blob: 3d88f957b6dee9462dff17cf1503151251ecda75
1 | /* |
2 | * copyright (c) 2001 Fabrice Bellard |
3 | * |
4 | * This file is part of FFmpeg. |
5 | * |
6 | * FFmpeg is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU Lesser General Public |
8 | * License as published by the Free Software Foundation; either |
9 | * version 2.1 of the License, or (at your option) any later version. |
10 | * |
11 | * FFmpeg is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | * Lesser General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU Lesser General Public |
17 | * License along with FFmpeg; if not, write to the Free Software |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | */ |
20 | |
21 | #ifndef AVCODEC_AVCODEC_H |
22 | #define AVCODEC_AVCODEC_H |
23 | |
24 | /** |
25 | * @file |
26 | * @ingroup libavc |
27 | * Libavcodec external API header |
28 | */ |
29 | |
30 | #include <errno.h> |
31 | #include "libavutil/samplefmt.h" |
32 | #include "libavutil/attributes.h" |
33 | #include "libavutil/avutil.h" |
34 | #include "libavutil/buffer.h" |
35 | #include "libavutil/cpu.h" |
36 | #include "libavutil/channel_layout.h" |
37 | #include "libavutil/dict.h" |
38 | #include "libavutil/frame.h" |
39 | #include "libavutil/log.h" |
40 | #include "libavutil/pixfmt.h" |
41 | #include "libavutil/rational.h" |
42 | |
43 | #include "version.h" |
44 | |
45 | /** |
46 | * @defgroup libavc libavcodec |
47 | * Encoding/Decoding Library |
48 | * |
49 | * @{ |
50 | * |
51 | * @defgroup lavc_decoding Decoding |
52 | * @{ |
53 | * @} |
54 | * |
55 | * @defgroup lavc_encoding Encoding |
56 | * @{ |
57 | * @} |
58 | * |
59 | * @defgroup lavc_codec Codecs |
60 | * @{ |
61 | * @defgroup lavc_codec_native Native Codecs |
62 | * @{ |
63 | * @} |
64 | * @defgroup lavc_codec_wrappers External library wrappers |
65 | * @{ |
66 | * @} |
67 | * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge |
68 | * @{ |
69 | * @} |
70 | * @} |
71 | * @defgroup lavc_internal Internal |
72 | * @{ |
73 | * @} |
74 | * @} |
75 | */ |
76 | |
77 | /** |
78 | * @ingroup libavc |
79 | * @defgroup lavc_encdec send/receive encoding and decoding API overview |
80 | * @{ |
81 | * |
82 | * The avcodec_send_packet()/avcodec_receive_frame()/avcodec_send_frame()/ |
83 | * avcodec_receive_packet() functions provide an encode/decode API, which |
84 | * decouples input and output. |
85 | * |
86 | * The API is very similar for encoding/decoding and audio/video, and works as |
87 | * follows: |
88 | * - Set up and open the AVCodecContext as usual. |
89 | * - Send valid input: |
90 | * - For decoding, call avcodec_send_packet() to give the decoder raw |
91 | * compressed data in an AVPacket. |
92 | * - For encoding, call avcodec_send_frame() to give the encoder an AVFrame |
93 | * containing uncompressed audio or video. |
94 | * In both cases, it is recommended that AVPackets and AVFrames are |
95 | * refcounted, or libavcodec might have to copy the input data. (libavformat |
96 | * always returns refcounted AVPackets, and av_frame_get_buffer() allocates |
97 | * refcounted AVFrames.) |
98 | * - Receive output in a loop. Periodically call one of the avcodec_receive_*() |
99 | * functions and process their output: |
100 | * - For decoding, call avcodec_receive_frame(). On success, it will return |
101 | * an AVFrame containing uncompressed audio or video data. |
102 | * - For encoding, call avcodec_receive_packet(). On success, it will return |
103 | * an AVPacket with a compressed frame. |
104 | * Repeat this call until it returns AVERROR(EAGAIN) or an error. The |
105 | * AVERROR(EAGAIN) return value means that new input data is required to |
106 | * return new output. In this case, continue with sending input. For each |
107 | * input frame/packet, the codec will typically return 1 output frame/packet, |
108 | * but it can also be 0 or more than 1. |
109 | * |
110 | * At the beginning of decoding or encoding, the codec might accept multiple |
111 | * input frames/packets without returning a frame, until its internal buffers |
112 | * are filled. This situation is handled transparently if you follow the steps |
113 | * outlined above. |
114 | * |
115 | * In theory, sending input can result in EAGAIN - this should happen only if |
116 | * not all output was received. You can use this to structure alternative decode |
117 | * or encode loops other than the one suggested above. For example, you could |
118 | * try sending new input on each iteration, and try to receive output if that |
119 | * returns EAGAIN. |
120 | * |
121 | * End of stream situations. These require "flushing" (aka draining) the codec, |
122 | * as the codec might buffer multiple frames or packets internally for |
123 | * performance or out of necessity (consider B-frames). |
124 | * This is handled as follows: |
125 | * - Instead of valid input, send NULL to the avcodec_send_packet() (decoding) |
126 | * or avcodec_send_frame() (encoding) functions. This will enter draining |
127 | * mode. |
128 | * - Call avcodec_receive_frame() (decoding) or avcodec_receive_packet() |
129 | * (encoding) in a loop until AVERROR_EOF is returned. The functions will |
130 | * not return AVERROR(EAGAIN), unless you forgot to enter draining mode. |
131 | * - Before decoding can be resumed again, the codec has to be reset with |
132 | * avcodec_flush_buffers(). |
133 | * |
134 | * Using the API as outlined above is highly recommended. But it is also |
135 | * possible to call functions outside of this rigid schema. For example, you can |
136 | * call avcodec_send_packet() repeatedly without calling |
137 | * avcodec_receive_frame(). In this case, avcodec_send_packet() will succeed |
138 | * until the codec's internal buffer has been filled up (which is typically of |
139 | * size 1 per output frame, after initial input), and then reject input with |
140 | * AVERROR(EAGAIN). Once it starts rejecting input, you have no choice but to |
141 | * read at least some output. |
142 | * |
143 | * Not all codecs will follow a rigid and predictable dataflow; the only |
144 | * guarantee is that an AVERROR(EAGAIN) return value on a send/receive call on |
145 | * one end implies that a receive/send call on the other end will succeed, or |
146 | * at least will not fail with AVERROR(EAGAIN). In general, no codec will |
147 | * permit unlimited buffering of input or output. |
148 | * |
149 | * This API replaces the following legacy functions: |
150 | * - avcodec_decode_video2() and avcodec_decode_audio4(): |
151 | * Use avcodec_send_packet() to feed input to the decoder, then use |
152 | * avcodec_receive_frame() to receive decoded frames after each packet. |
153 | * Unlike with the old video decoding API, multiple frames might result from |
154 | * a packet. For audio, splitting the input packet into frames by partially |
155 | * decoding packets becomes transparent to the API user. You never need to |
156 | * feed an AVPacket to the API twice (unless it is rejected with AVERROR(EAGAIN) - then |
157 | * no data was read from the packet). |
158 | * Additionally, sending a flush/draining packet is required only once. |
159 | * - avcodec_encode_video2()/avcodec_encode_audio2(): |
160 | * Use avcodec_send_frame() to feed input to the encoder, then use |
161 | * avcodec_receive_packet() to receive encoded packets. |
162 | * Providing user-allocated buffers for avcodec_receive_packet() is not |
163 | * possible. |
164 | * - The new API does not handle subtitles yet. |
165 | * |
166 | * Mixing new and old function calls on the same AVCodecContext is not allowed, |
167 | * and will result in undefined behavior. |
168 | * |
169 | * Some codecs might require using the new API; using the old API will return |
170 | * an error when calling it. All codecs support the new API. |
171 | * |
172 | * A codec is not allowed to return AVERROR(EAGAIN) for both sending and receiving. This |
173 | * would be an invalid state, which could put the codec user into an endless |
174 | * loop. The API has no concept of time either: it cannot happen that trying to |
175 | * do avcodec_send_packet() results in AVERROR(EAGAIN), but a repeated call 1 second |
176 | * later accepts the packet (with no other receive/flush API calls involved). |
177 | * The API is a strict state machine, and the passage of time is not supposed |
178 | * to influence it. Some timing-dependent behavior might still be deemed |
179 | * acceptable in certain cases. But it must never result in both send/receive |
180 | * returning EAGAIN at the same time at any point. It must also absolutely be |
181 | * avoided that the current state is "unstable" and can "flip-flop" between |
182 | * the send/receive APIs allowing progress. For example, it's not allowed that |
183 | * the codec randomly decides that it actually wants to consume a packet now |
184 | * instead of returning a frame, after it just returned AVERROR(EAGAIN) on an |
185 | * avcodec_send_packet() call. |
186 | * @} |
187 | */ |
188 | |
189 | /** |
190 | * @defgroup lavc_core Core functions/structures. |
191 | * @ingroup libavc |
192 | * |
193 | * Basic definitions, functions for querying libavcodec capabilities, |
194 | * allocating core structures, etc. |
195 | * @{ |
196 | */ |
197 | |
198 | |
199 | /** |
200 | * Identify the syntax and semantics of the bitstream. |
201 | * The principle is roughly: |
202 | * Two decoders with the same ID can decode the same streams. |
203 | * Two encoders with the same ID can encode compatible streams. |
204 | * There may be slight deviations from the principle due to implementation |
205 | * details. |
206 | * |
207 | * If you add a codec ID to this list, add it so that |
208 | * 1. no value of an existing codec ID changes (that would break ABI), |
209 | * 2. it is as close as possible to similar codecs |
210 | * |
211 | * After adding new codec IDs, do not forget to add an entry to the codec |
212 | * descriptor list and bump libavcodec minor version. |
213 | */ |
214 | enum AVCodecID { |
215 | AV_CODEC_ID_NONE, |
216 | |
217 | /* video codecs */ |
218 | AV_CODEC_ID_MPEG1VIDEO, |
219 | AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding |
220 | #if FF_API_XVMC |
221 | AV_CODEC_ID_MPEG2VIDEO_XVMC, |
222 | #endif /* FF_API_XVMC */ |
223 | AV_CODEC_ID_H261, |
224 | AV_CODEC_ID_H263, |
225 | AV_CODEC_ID_RV10, |
226 | AV_CODEC_ID_RV20, |
227 | AV_CODEC_ID_MJPEG, |
228 | AV_CODEC_ID_MJPEGB, |
229 | AV_CODEC_ID_LJPEG, |
230 | AV_CODEC_ID_SP5X, |
231 | AV_CODEC_ID_JPEGLS, |
232 | AV_CODEC_ID_MPEG4, |
233 | AV_CODEC_ID_RAWVIDEO, |
234 | AV_CODEC_ID_MSMPEG4V1, |
235 | AV_CODEC_ID_MSMPEG4V2, |
236 | AV_CODEC_ID_MSMPEG4V3, |
237 | AV_CODEC_ID_WMV1, |
238 | AV_CODEC_ID_WMV2, |
239 | AV_CODEC_ID_H263P, |
240 | AV_CODEC_ID_H263I, |
241 | AV_CODEC_ID_FLV1, |
242 | AV_CODEC_ID_SVQ1, |
243 | AV_CODEC_ID_SVQ3, |
244 | AV_CODEC_ID_DVVIDEO, |
245 | AV_CODEC_ID_HUFFYUV, |
246 | AV_CODEC_ID_CYUV, |
247 | AV_CODEC_ID_H264, |
248 | AV_CODEC_ID_INDEO3, |
249 | AV_CODEC_ID_VP3, |
250 | AV_CODEC_ID_THEORA, |
251 | AV_CODEC_ID_ASV1, |
252 | AV_CODEC_ID_ASV2, |
253 | AV_CODEC_ID_FFV1, |
254 | AV_CODEC_ID_4XM, |
255 | AV_CODEC_ID_VCR1, |
256 | AV_CODEC_ID_CLJR, |
257 | AV_CODEC_ID_MDEC, |
258 | AV_CODEC_ID_ROQ, |
259 | AV_CODEC_ID_INTERPLAY_VIDEO, |
260 | AV_CODEC_ID_XAN_WC3, |
261 | AV_CODEC_ID_XAN_WC4, |
262 | AV_CODEC_ID_RPZA, |
263 | AV_CODEC_ID_CINEPAK, |
264 | AV_CODEC_ID_WS_VQA, |
265 | AV_CODEC_ID_MSRLE, |
266 | AV_CODEC_ID_MSVIDEO1, |
267 | AV_CODEC_ID_IDCIN, |
268 | AV_CODEC_ID_8BPS, |
269 | AV_CODEC_ID_SMC, |
270 | AV_CODEC_ID_FLIC, |
271 | AV_CODEC_ID_TRUEMOTION1, |
272 | AV_CODEC_ID_VMDVIDEO, |
273 | AV_CODEC_ID_MSZH, |
274 | AV_CODEC_ID_ZLIB, |
275 | AV_CODEC_ID_QTRLE, |
276 | AV_CODEC_ID_TSCC, |
277 | AV_CODEC_ID_ULTI, |
278 | AV_CODEC_ID_QDRAW, |
279 | AV_CODEC_ID_VIXL, |
280 | AV_CODEC_ID_QPEG, |
281 | AV_CODEC_ID_PNG, |
282 | AV_CODEC_ID_PPM, |
283 | AV_CODEC_ID_PBM, |
284 | AV_CODEC_ID_PGM, |
285 | AV_CODEC_ID_PGMYUV, |
286 | AV_CODEC_ID_PAM, |
287 | AV_CODEC_ID_FFVHUFF, |
288 | AV_CODEC_ID_RV30, |
289 | AV_CODEC_ID_RV40, |
290 | AV_CODEC_ID_VC1, |
291 | AV_CODEC_ID_WMV3, |
292 | AV_CODEC_ID_LOCO, |
293 | AV_CODEC_ID_WNV1, |
294 | AV_CODEC_ID_AASC, |
295 | AV_CODEC_ID_INDEO2, |
296 | AV_CODEC_ID_FRAPS, |
297 | AV_CODEC_ID_TRUEMOTION2, |
298 | AV_CODEC_ID_BMP, |
299 | AV_CODEC_ID_CSCD, |
300 | AV_CODEC_ID_MMVIDEO, |
301 | AV_CODEC_ID_ZMBV, |
302 | AV_CODEC_ID_AVS, |
303 | AV_CODEC_ID_SMACKVIDEO, |
304 | AV_CODEC_ID_NUV, |
305 | AV_CODEC_ID_KMVC, |
306 | AV_CODEC_ID_FLASHSV, |
307 | AV_CODEC_ID_CAVS, |
308 | AV_CODEC_ID_JPEG2000, |
309 | AV_CODEC_ID_VMNC, |
310 | AV_CODEC_ID_VP5, |
311 | AV_CODEC_ID_VP6, |
312 | AV_CODEC_ID_VP6F, |
313 | AV_CODEC_ID_TARGA, |
314 | AV_CODEC_ID_DSICINVIDEO, |
315 | AV_CODEC_ID_TIERTEXSEQVIDEO, |
316 | AV_CODEC_ID_TIFF, |
317 | AV_CODEC_ID_GIF, |
318 | AV_CODEC_ID_DXA, |
319 | AV_CODEC_ID_DNXHD, |
320 | AV_CODEC_ID_THP, |
321 | AV_CODEC_ID_SGI, |
322 | AV_CODEC_ID_C93, |
323 | AV_CODEC_ID_BETHSOFTVID, |
324 | AV_CODEC_ID_PTX, |
325 | AV_CODEC_ID_TXD, |
326 | AV_CODEC_ID_VP6A, |
327 | AV_CODEC_ID_AMV, |
328 | AV_CODEC_ID_VB, |
329 | AV_CODEC_ID_PCX, |
330 | AV_CODEC_ID_SUNRAST, |
331 | AV_CODEC_ID_INDEO4, |
332 | AV_CODEC_ID_INDEO5, |
333 | AV_CODEC_ID_MIMIC, |
334 | AV_CODEC_ID_RL2, |
335 | AV_CODEC_ID_ESCAPE124, |
336 | AV_CODEC_ID_DIRAC, |
337 | AV_CODEC_ID_BFI, |
338 | AV_CODEC_ID_CMV, |
339 | AV_CODEC_ID_MOTIONPIXELS, |
340 | AV_CODEC_ID_TGV, |
341 | AV_CODEC_ID_TGQ, |
342 | AV_CODEC_ID_TQI, |
343 | AV_CODEC_ID_AURA, |
344 | AV_CODEC_ID_AURA2, |
345 | AV_CODEC_ID_V210X, |
346 | AV_CODEC_ID_TMV, |
347 | AV_CODEC_ID_V210, |
348 | AV_CODEC_ID_DPX, |
349 | AV_CODEC_ID_MAD, |
350 | AV_CODEC_ID_FRWU, |
351 | AV_CODEC_ID_FLASHSV2, |
352 | AV_CODEC_ID_CDGRAPHICS, |
353 | AV_CODEC_ID_R210, |
354 | AV_CODEC_ID_ANM, |
355 | AV_CODEC_ID_BINKVIDEO, |
356 | AV_CODEC_ID_IFF_ILBM, |
357 | #define AV_CODEC_ID_IFF_BYTERUN1 AV_CODEC_ID_IFF_ILBM |
358 | AV_CODEC_ID_KGV1, |
359 | AV_CODEC_ID_YOP, |
360 | AV_CODEC_ID_VP8, |
361 | AV_CODEC_ID_PICTOR, |
362 | AV_CODEC_ID_ANSI, |
363 | AV_CODEC_ID_A64_MULTI, |
364 | AV_CODEC_ID_A64_MULTI5, |
365 | AV_CODEC_ID_R10K, |
366 | AV_CODEC_ID_MXPEG, |
367 | AV_CODEC_ID_LAGARITH, |
368 | AV_CODEC_ID_PRORES, |
369 | AV_CODEC_ID_JV, |
370 | AV_CODEC_ID_DFA, |
371 | AV_CODEC_ID_WMV3IMAGE, |
372 | AV_CODEC_ID_VC1IMAGE, |
373 | AV_CODEC_ID_UTVIDEO, |
374 | AV_CODEC_ID_BMV_VIDEO, |
375 | AV_CODEC_ID_VBLE, |
376 | AV_CODEC_ID_DXTORY, |
377 | AV_CODEC_ID_V410, |
378 | AV_CODEC_ID_XWD, |
379 | AV_CODEC_ID_CDXL, |
380 | AV_CODEC_ID_XBM, |
381 | AV_CODEC_ID_ZEROCODEC, |
382 | AV_CODEC_ID_MSS1, |
383 | AV_CODEC_ID_MSA1, |
384 | AV_CODEC_ID_TSCC2, |
385 | AV_CODEC_ID_MTS2, |
386 | AV_CODEC_ID_CLLC, |
387 | AV_CODEC_ID_MSS2, |
388 | AV_CODEC_ID_VP9, |
389 | AV_CODEC_ID_AIC, |
390 | AV_CODEC_ID_ESCAPE130, |
391 | AV_CODEC_ID_G2M, |
392 | AV_CODEC_ID_WEBP, |
393 | AV_CODEC_ID_HNM4_VIDEO, |
394 | AV_CODEC_ID_HEVC, |
395 | #define AV_CODEC_ID_H265 AV_CODEC_ID_HEVC |
396 | AV_CODEC_ID_FIC, |
397 | AV_CODEC_ID_ALIAS_PIX, |
398 | AV_CODEC_ID_BRENDER_PIX, |
399 | AV_CODEC_ID_PAF_VIDEO, |
400 | AV_CODEC_ID_EXR, |
401 | AV_CODEC_ID_VP7, |
402 | AV_CODEC_ID_SANM, |
403 | AV_CODEC_ID_SGIRLE, |
404 | AV_CODEC_ID_MVC1, |
405 | AV_CODEC_ID_MVC2, |
406 | AV_CODEC_ID_HQX, |
407 | AV_CODEC_ID_TDSC, |
408 | AV_CODEC_ID_HQ_HQA, |
409 | AV_CODEC_ID_HAP, |
410 | AV_CODEC_ID_DDS, |
411 | AV_CODEC_ID_DXV, |
412 | AV_CODEC_ID_SCREENPRESSO, |
413 | AV_CODEC_ID_RSCC, |
414 | |
415 | AV_CODEC_ID_Y41P = 0x8000, |
416 | AV_CODEC_ID_AVRP, |
417 | AV_CODEC_ID_012V, |
418 | AV_CODEC_ID_AVUI, |
419 | AV_CODEC_ID_AYUV, |
420 | AV_CODEC_ID_TARGA_Y216, |
421 | AV_CODEC_ID_V308, |
422 | AV_CODEC_ID_V408, |
423 | AV_CODEC_ID_YUV4, |
424 | AV_CODEC_ID_AVRN, |
425 | AV_CODEC_ID_CPIA, |
426 | AV_CODEC_ID_XFACE, |
427 | AV_CODEC_ID_SNOW, |
428 | AV_CODEC_ID_SMVJPEG, |
429 | AV_CODEC_ID_APNG, |
430 | AV_CODEC_ID_DAALA, |
431 | AV_CODEC_ID_CFHD, |
432 | AV_CODEC_ID_TRUEMOTION2RT, |
433 | AV_CODEC_ID_M101, |
434 | AV_CODEC_ID_MAGICYUV, |
435 | AV_CODEC_ID_SHEERVIDEO, |
436 | AV_CODEC_ID_YLC, |
437 | AV_CODEC_ID_PSD, |
438 | AV_CODEC_ID_PIXLET, |
439 | AV_CODEC_ID_SPEEDHQ, |
440 | AV_CODEC_ID_FMVC, |
441 | AV_CODEC_ID_SCPR, |
442 | AV_CODEC_ID_CLEARVIDEO, |
443 | AV_CODEC_ID_XPM, |
444 | AV_CODEC_ID_AV1, |
445 | |
446 | /* various PCM "codecs" */ |
447 | AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs |
448 | AV_CODEC_ID_PCM_S16LE = 0x10000, |
449 | AV_CODEC_ID_PCM_S16BE, |
450 | AV_CODEC_ID_PCM_U16LE, |
451 | AV_CODEC_ID_PCM_U16BE, |
452 | AV_CODEC_ID_PCM_S8, |
453 | AV_CODEC_ID_PCM_U8, |
454 | AV_CODEC_ID_PCM_MULAW, |
455 | AV_CODEC_ID_PCM_ALAW, |
456 | AV_CODEC_ID_PCM_S32LE, |
457 | AV_CODEC_ID_PCM_S32BE, |
458 | AV_CODEC_ID_PCM_U32LE, |
459 | AV_CODEC_ID_PCM_U32BE, |
460 | AV_CODEC_ID_PCM_S24LE, |
461 | AV_CODEC_ID_PCM_S24BE, |
462 | AV_CODEC_ID_PCM_U24LE, |
463 | AV_CODEC_ID_PCM_U24BE, |
464 | AV_CODEC_ID_PCM_S24DAUD, |
465 | AV_CODEC_ID_PCM_ZORK, |
466 | AV_CODEC_ID_PCM_S16LE_PLANAR, |
467 | AV_CODEC_ID_PCM_DVD, |
468 | AV_CODEC_ID_PCM_F32BE, |
469 | AV_CODEC_ID_PCM_F32LE, |
470 | AV_CODEC_ID_PCM_F64BE, |
471 | AV_CODEC_ID_PCM_F64LE, |
472 | AV_CODEC_ID_PCM_BLURAY, |
473 | AV_CODEC_ID_PCM_LXF, |
474 | AV_CODEC_ID_S302M, |
475 | AV_CODEC_ID_PCM_S8_PLANAR, |
476 | AV_CODEC_ID_PCM_S24LE_PLANAR, |
477 | AV_CODEC_ID_PCM_S32LE_PLANAR, |
478 | AV_CODEC_ID_PCM_S16BE_PLANAR, |
479 | |
480 | AV_CODEC_ID_PCM_S64LE = 0x10800, |
481 | AV_CODEC_ID_PCM_S64BE, |
482 | AV_CODEC_ID_PCM_F16LE, |
483 | AV_CODEC_ID_PCM_F24LE, |
484 | |
485 | /* various ADPCM codecs */ |
486 | AV_CODEC_ID_ADPCM_IMA_QT = 0x11000, |
487 | AV_CODEC_ID_ADPCM_IMA_WAV, |
488 | AV_CODEC_ID_ADPCM_IMA_DK3, |
489 | AV_CODEC_ID_ADPCM_IMA_DK4, |
490 | AV_CODEC_ID_ADPCM_IMA_WS, |
491 | AV_CODEC_ID_ADPCM_IMA_SMJPEG, |
492 | AV_CODEC_ID_ADPCM_MS, |
493 | AV_CODEC_ID_ADPCM_4XM, |
494 | AV_CODEC_ID_ADPCM_XA, |
495 | AV_CODEC_ID_ADPCM_ADX, |
496 | AV_CODEC_ID_ADPCM_EA, |
497 | AV_CODEC_ID_ADPCM_G726, |
498 | AV_CODEC_ID_ADPCM_CT, |
499 | AV_CODEC_ID_ADPCM_SWF, |
500 | AV_CODEC_ID_ADPCM_YAMAHA, |
501 | AV_CODEC_ID_ADPCM_SBPRO_4, |
502 | AV_CODEC_ID_ADPCM_SBPRO_3, |
503 | AV_CODEC_ID_ADPCM_SBPRO_2, |
504 | AV_CODEC_ID_ADPCM_THP, |
505 | AV_CODEC_ID_ADPCM_IMA_AMV, |
506 | AV_CODEC_ID_ADPCM_EA_R1, |
507 | AV_CODEC_ID_ADPCM_EA_R3, |
508 | AV_CODEC_ID_ADPCM_EA_R2, |
509 | AV_CODEC_ID_ADPCM_IMA_EA_SEAD, |
510 | AV_CODEC_ID_ADPCM_IMA_EA_EACS, |
511 | AV_CODEC_ID_ADPCM_EA_XAS, |
512 | AV_CODEC_ID_ADPCM_EA_MAXIS_XA, |
513 | AV_CODEC_ID_ADPCM_IMA_ISS, |
514 | AV_CODEC_ID_ADPCM_G722, |
515 | AV_CODEC_ID_ADPCM_IMA_APC, |
516 | AV_CODEC_ID_ADPCM_VIMA, |
517 | #if FF_API_VIMA_DECODER |
518 | AV_CODEC_ID_VIMA = AV_CODEC_ID_ADPCM_VIMA, |
519 | #endif |
520 | |
521 | AV_CODEC_ID_ADPCM_AFC = 0x11800, |
522 | AV_CODEC_ID_ADPCM_IMA_OKI, |
523 | AV_CODEC_ID_ADPCM_DTK, |
524 | AV_CODEC_ID_ADPCM_IMA_RAD, |
525 | AV_CODEC_ID_ADPCM_G726LE, |
526 | AV_CODEC_ID_ADPCM_THP_LE, |
527 | AV_CODEC_ID_ADPCM_PSX, |
528 | AV_CODEC_ID_ADPCM_AICA, |
529 | AV_CODEC_ID_ADPCM_IMA_DAT4, |
530 | AV_CODEC_ID_ADPCM_MTAF, |
531 | |
532 | /* AMR */ |
533 | AV_CODEC_ID_AMR_NB = 0x12000, |
534 | AV_CODEC_ID_AMR_WB, |
535 | |
536 | /* RealAudio codecs*/ |
537 | AV_CODEC_ID_RA_144 = 0x13000, |
538 | AV_CODEC_ID_RA_288, |
539 | |
540 | /* various DPCM codecs */ |
541 | AV_CODEC_ID_ROQ_DPCM = 0x14000, |
542 | AV_CODEC_ID_INTERPLAY_DPCM, |
543 | AV_CODEC_ID_XAN_DPCM, |
544 | AV_CODEC_ID_SOL_DPCM, |
545 | |
546 | AV_CODEC_ID_SDX2_DPCM = 0x14800, |
547 | |
548 | /* audio codecs */ |
549 | AV_CODEC_ID_MP2 = 0x15000, |
550 | AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3 |
551 | AV_CODEC_ID_AAC, |
552 | AV_CODEC_ID_AC3, |
553 | AV_CODEC_ID_DTS, |
554 | AV_CODEC_ID_VORBIS, |
555 | AV_CODEC_ID_DVAUDIO, |
556 | AV_CODEC_ID_WMAV1, |
557 | AV_CODEC_ID_WMAV2, |
558 | AV_CODEC_ID_MACE3, |
559 | AV_CODEC_ID_MACE6, |
560 | AV_CODEC_ID_VMDAUDIO, |
561 | AV_CODEC_ID_FLAC, |
562 | AV_CODEC_ID_MP3ADU, |
563 | AV_CODEC_ID_MP3ON4, |
564 | AV_CODEC_ID_SHORTEN, |
565 | AV_CODEC_ID_ALAC, |
566 | AV_CODEC_ID_WESTWOOD_SND1, |
567 | AV_CODEC_ID_GSM, ///< as in Berlin toast format |
568 | AV_CODEC_ID_QDM2, |
569 | AV_CODEC_ID_COOK, |
570 | AV_CODEC_ID_TRUESPEECH, |
571 | AV_CODEC_ID_TTA, |
572 | AV_CODEC_ID_SMACKAUDIO, |
573 | AV_CODEC_ID_QCELP, |
574 | AV_CODEC_ID_WAVPACK, |
575 | AV_CODEC_ID_DSICINAUDIO, |
576 | AV_CODEC_ID_IMC, |
577 | AV_CODEC_ID_MUSEPACK7, |
578 | AV_CODEC_ID_MLP, |
579 | AV_CODEC_ID_GSM_MS, /* as found in WAV */ |
580 | AV_CODEC_ID_ATRAC3, |
581 | #if FF_API_VOXWARE |
582 | AV_CODEC_ID_VOXWARE, |
583 | #endif |
584 | AV_CODEC_ID_APE, |
585 | AV_CODEC_ID_NELLYMOSER, |
586 | AV_CODEC_ID_MUSEPACK8, |
587 | AV_CODEC_ID_SPEEX, |
588 | AV_CODEC_ID_WMAVOICE, |
589 | AV_CODEC_ID_WMAPRO, |
590 | AV_CODEC_ID_WMALOSSLESS, |
591 | AV_CODEC_ID_ATRAC3P, |
592 | AV_CODEC_ID_EAC3, |
593 | AV_CODEC_ID_SIPR, |
594 | AV_CODEC_ID_MP1, |
595 | AV_CODEC_ID_TWINVQ, |
596 | AV_CODEC_ID_TRUEHD, |
597 | AV_CODEC_ID_MP4ALS, |
598 | AV_CODEC_ID_ATRAC1, |
599 | AV_CODEC_ID_BINKAUDIO_RDFT, |
600 | AV_CODEC_ID_BINKAUDIO_DCT, |
601 | AV_CODEC_ID_AAC_LATM, |
602 | AV_CODEC_ID_QDMC, |
603 | AV_CODEC_ID_CELT, |
604 | AV_CODEC_ID_G723_1, |
605 | AV_CODEC_ID_G729, |
606 | AV_CODEC_ID_8SVX_EXP, |
607 | AV_CODEC_ID_8SVX_FIB, |
608 | AV_CODEC_ID_BMV_AUDIO, |
609 | AV_CODEC_ID_RALF, |
610 | AV_CODEC_ID_IAC, |
611 | AV_CODEC_ID_ILBC, |
612 | AV_CODEC_ID_OPUS, |
613 | AV_CODEC_ID_COMFORT_NOISE, |
614 | AV_CODEC_ID_TAK, |
615 | AV_CODEC_ID_METASOUND, |
616 | AV_CODEC_ID_PAF_AUDIO, |
617 | AV_CODEC_ID_ON2AVC, |
618 | AV_CODEC_ID_DSS_SP, |
619 | |
620 | AV_CODEC_ID_FFWAVESYNTH = 0x15800, |
621 | AV_CODEC_ID_SONIC, |
622 | AV_CODEC_ID_SONIC_LS, |
623 | AV_CODEC_ID_EVRC, |
624 | AV_CODEC_ID_SMV, |
625 | AV_CODEC_ID_DSD_LSBF, |
626 | AV_CODEC_ID_DSD_MSBF, |
627 | AV_CODEC_ID_DSD_LSBF_PLANAR, |
628 | AV_CODEC_ID_DSD_MSBF_PLANAR, |
629 | AV_CODEC_ID_4GV, |
630 | AV_CODEC_ID_INTERPLAY_ACM, |
631 | AV_CODEC_ID_XMA1, |
632 | AV_CODEC_ID_XMA2, |
633 | AV_CODEC_ID_DST, |
634 | AV_CODEC_ID_ATRAC3AL, |
635 | AV_CODEC_ID_ATRAC3PAL, |
636 | |
637 | AV_CODEC_ID_DRA = MKBETAG('D','A','R','1'), |
638 | |
639 | /* subtitle codecs */ |
640 | AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs. |
641 | AV_CODEC_ID_DVD_SUBTITLE = 0x17000, |
642 | AV_CODEC_ID_DVB_SUBTITLE, |
643 | AV_CODEC_ID_TEXT, ///< raw UTF-8 text |
644 | AV_CODEC_ID_XSUB, |
645 | AV_CODEC_ID_SSA, |
646 | AV_CODEC_ID_MOV_TEXT, |
647 | AV_CODEC_ID_HDMV_PGS_SUBTITLE, |
648 | AV_CODEC_ID_DVB_TELETEXT, |
649 | AV_CODEC_ID_SRT, |
650 | |
651 | AV_CODEC_ID_MICRODVD = 0x17800, |
652 | AV_CODEC_ID_EIA_608, |
653 | AV_CODEC_ID_JACOSUB, |
654 | AV_CODEC_ID_SAMI, |
655 | AV_CODEC_ID_REALTEXT, |
656 | AV_CODEC_ID_STL, |
657 | AV_CODEC_ID_SUBVIEWER1, |
658 | AV_CODEC_ID_SUBVIEWER, |
659 | AV_CODEC_ID_SUBRIP, |
660 | AV_CODEC_ID_WEBVTT, |
661 | AV_CODEC_ID_MPL2, |
662 | AV_CODEC_ID_VPLAYER, |
663 | AV_CODEC_ID_PJS, |
664 | AV_CODEC_ID_ASS, |
665 | AV_CODEC_ID_HDMV_TEXT_SUBTITLE, |
666 | |
667 | /* other specific kind of codecs (generally used for attachments) */ |
668 | AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs. |
669 | AV_CODEC_ID_TTF = 0x18000, |
670 | |
671 | AV_CODEC_ID_SCTE_35, ///< Contain timestamp estimated through PCR of program stream. |
672 | AV_CODEC_ID_BINTEXT = 0x18800, |
673 | AV_CODEC_ID_XBIN, |
674 | AV_CODEC_ID_IDF, |
675 | AV_CODEC_ID_OTF, |
676 | AV_CODEC_ID_SMPTE_KLV, |
677 | AV_CODEC_ID_DVD_NAV, |
678 | AV_CODEC_ID_TIMED_ID3, |
679 | AV_CODEC_ID_BIN_DATA, |
680 | |
681 | |
682 | AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it |
683 | |
684 | AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS |
685 | * stream (only used by libavformat) */ |
686 | AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems |
687 | * stream (only used by libavformat) */ |
688 | AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information. |
689 | AV_CODEC_ID_WRAPPED_AVFRAME = 0x21001, ///< Passthrough codec, AVFrames wrapped in AVPacket |
690 | }; |
691 | |
692 | /** |
693 | * This struct describes the properties of a single codec described by an |
694 | * AVCodecID. |
695 | * @see avcodec_descriptor_get() |
696 | */ |
697 | typedef struct AVCodecDescriptor { |
698 | enum AVCodecID id; |
699 | enum AVMediaType type; |
700 | /** |
701 | * Name of the codec described by this descriptor. It is non-empty and |
702 | * unique for each codec descriptor. It should contain alphanumeric |
703 | * characters and '_' only. |
704 | */ |
705 | const char *name; |
706 | /** |
707 | * A more descriptive name for this codec. May be NULL. |
708 | */ |
709 | const char *long_name; |
710 | /** |
711 | * Codec properties, a combination of AV_CODEC_PROP_* flags. |
712 | */ |
713 | int props; |
714 | /** |
715 | * MIME type(s) associated with the codec. |
716 | * May be NULL; if not, a NULL-terminated array of MIME types. |
717 | * The first item is always non-NULL and is the preferred MIME type. |
718 | */ |
719 | const char *const *mime_types; |
720 | /** |
721 | * If non-NULL, an array of profiles recognized for this codec. |
722 | * Terminated with FF_PROFILE_UNKNOWN. |
723 | */ |
724 | const struct AVProfile *profiles; |
725 | } AVCodecDescriptor; |
726 | |
727 | /** |
728 | * Codec uses only intra compression. |
729 | * Video codecs only. |
730 | */ |
731 | #define AV_CODEC_PROP_INTRA_ONLY (1 << 0) |
732 | /** |
733 | * Codec supports lossy compression. Audio and video codecs only. |
734 | * @note a codec may support both lossy and lossless |
735 | * compression modes |
736 | */ |
737 | #define AV_CODEC_PROP_LOSSY (1 << 1) |
738 | /** |
739 | * Codec supports lossless compression. Audio and video codecs only. |
740 | */ |
741 | #define AV_CODEC_PROP_LOSSLESS (1 << 2) |
742 | /** |
743 | * Codec supports frame reordering. That is, the coded order (the order in which |
744 | * the encoded packets are output by the encoders / stored / input to the |
745 | * decoders) may be different from the presentation order of the corresponding |
746 | * frames. |
747 | * |
748 | * For codecs that do not have this property set, PTS and DTS should always be |
749 | * equal. |
750 | */ |
751 | #define AV_CODEC_PROP_REORDER (1 << 3) |
752 | /** |
753 | * Subtitle codec is bitmap based |
754 | * Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field. |
755 | */ |
756 | #define AV_CODEC_PROP_BITMAP_SUB (1 << 16) |
757 | /** |
758 | * Subtitle codec is text based. |
759 | * Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field. |
760 | */ |
761 | #define AV_CODEC_PROP_TEXT_SUB (1 << 17) |
762 | |
763 | /** |
764 | * @ingroup lavc_decoding |
765 | * Required number of additionally allocated bytes at the end of the input bitstream for decoding. |
766 | * This is mainly needed because some optimized bitstream readers read |
767 | * 32 or 64 bit at once and could read over the end.<br> |
768 | * Note: If the first 23 bits of the additional bytes are not 0, then damaged |
769 | * MPEG bitstreams could cause overread and segfault. |
770 | */ |
771 | #define AV_INPUT_BUFFER_PADDING_SIZE 32 |
772 | |
773 | /** |
774 | * @ingroup lavc_encoding |
775 | * minimum encoding buffer size |
776 | * Used to avoid some checks during header writing. |
777 | */ |
778 | #define AV_INPUT_BUFFER_MIN_SIZE 16384 |
779 | |
780 | #if FF_API_WITHOUT_PREFIX |
781 | /** |
782 | * @deprecated use AV_INPUT_BUFFER_PADDING_SIZE instead |
783 | */ |
784 | #define FF_INPUT_BUFFER_PADDING_SIZE 32 |
785 | |
786 | /** |
787 | * @deprecated use AV_INPUT_BUFFER_MIN_SIZE instead |
788 | */ |
789 | #define FF_MIN_BUFFER_SIZE 16384 |
790 | #endif /* FF_API_WITHOUT_PREFIX */ |
791 | |
792 | /** |
793 | * @ingroup lavc_encoding |
794 | * motion estimation type. |
795 | * @deprecated use codec private option instead |
796 | */ |
797 | #if FF_API_MOTION_EST |
798 | enum Motion_Est_ID { |
799 | ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed |
800 | ME_FULL, |
801 | ME_LOG, |
802 | ME_PHODS, |
803 | ME_EPZS, ///< enhanced predictive zonal search |
804 | ME_X1, ///< reserved for experiments |
805 | ME_HEX, ///< hexagon based search |
806 | ME_UMH, ///< uneven multi-hexagon search |
807 | ME_TESA, ///< transformed exhaustive search algorithm |
808 | ME_ITER=50, ///< iterative search |
809 | }; |
810 | #endif |
811 | |
812 | /** |
813 | * @ingroup lavc_decoding |
814 | */ |
815 | enum AVDiscard{ |
816 | /* We leave some space between them for extensions (drop some |
817 | * keyframes for intra-only or drop just some bidir frames). */ |
818 | AVDISCARD_NONE =-16, ///< discard nothing |
819 | AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi |
820 | AVDISCARD_NONREF = 8, ///< discard all non reference |
821 | AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames |
822 | AVDISCARD_NONINTRA= 24, ///< discard all non intra frames |
823 | AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes |
824 | AVDISCARD_ALL = 48, ///< discard all |
825 | }; |
826 | |
827 | enum AVAudioServiceType { |
828 | AV_AUDIO_SERVICE_TYPE_MAIN = 0, |
829 | AV_AUDIO_SERVICE_TYPE_EFFECTS = 1, |
830 | AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2, |
831 | AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3, |
832 | AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4, |
833 | AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5, |
834 | AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6, |
835 | AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7, |
836 | AV_AUDIO_SERVICE_TYPE_KARAOKE = 8, |
837 | AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI |
838 | }; |
839 | |
840 | /** |
841 | * @ingroup lavc_encoding |
842 | */ |
843 | typedef struct RcOverride{ |
844 | int start_frame; |
845 | int end_frame; |
846 | int qscale; // If this is 0 then quality_factor will be used instead. |
847 | float quality_factor; |
848 | } RcOverride; |
849 | |
850 | #if FF_API_MAX_BFRAMES |
851 | /** |
852 | * @deprecated there is no libavcodec-wide limit on the number of B-frames |
853 | */ |
854 | #define FF_MAX_B_FRAMES 16 |
855 | #endif |
856 | |
857 | /* encoding support |
858 | These flags can be passed in AVCodecContext.flags before initialization. |
859 | Note: Not everything is supported yet. |
860 | */ |
861 | |
862 | /** |
863 | * Allow decoders to produce frames with data planes that are not aligned |
864 | * to CPU requirements (e.g. due to cropping). |
865 | */ |
866 | #define AV_CODEC_FLAG_UNALIGNED (1 << 0) |
867 | /** |
868 | * Use fixed qscale. |
869 | */ |
870 | #define AV_CODEC_FLAG_QSCALE (1 << 1) |
871 | /** |
872 | * 4 MV per MB allowed / advanced prediction for H.263. |
873 | */ |
874 | #define AV_CODEC_FLAG_4MV (1 << 2) |
875 | /** |
876 | * Output even those frames that might be corrupted. |
877 | */ |
878 | #define AV_CODEC_FLAG_OUTPUT_CORRUPT (1 << 3) |
879 | /** |
880 | * Use qpel MC. |
881 | */ |
882 | #define AV_CODEC_FLAG_QPEL (1 << 4) |
883 | /** |
884 | * Use internal 2pass ratecontrol in first pass mode. |
885 | */ |
886 | #define AV_CODEC_FLAG_PASS1 (1 << 9) |
887 | /** |
888 | * Use internal 2pass ratecontrol in second pass mode. |
889 | */ |
890 | #define AV_CODEC_FLAG_PASS2 (1 << 10) |
891 | /** |
892 | * loop filter. |
893 | */ |
894 | #define AV_CODEC_FLAG_LOOP_FILTER (1 << 11) |
895 | /** |
896 | * Only decode/encode grayscale. |
897 | */ |
898 | #define AV_CODEC_FLAG_GRAY (1 << 13) |
899 | /** |
900 | * error[?] variables will be set during encoding. |
901 | */ |
902 | #define AV_CODEC_FLAG_PSNR (1 << 15) |
903 | /** |
904 | * Input bitstream might be truncated at a random location |
905 | * instead of only at frame boundaries. |
906 | */ |
907 | #define AV_CODEC_FLAG_TRUNCATED (1 << 16) |
908 | /** |
909 | * Use interlaced DCT. |
910 | */ |
911 | #define AV_CODEC_FLAG_INTERLACED_DCT (1 << 18) |
912 | /** |
913 | * Force low delay. |
914 | */ |
915 | #define AV_CODEC_FLAG_LOW_DELAY (1 << 19) |
916 | /** |
917 | * Place global headers in extradata instead of every keyframe. |
918 | */ |
919 | #define AV_CODEC_FLAG_GLOBAL_HEADER (1 << 22) |
920 | /** |
921 | * Use only bitexact stuff (except (I)DCT). |
922 | */ |
923 | #define AV_CODEC_FLAG_BITEXACT (1 << 23) |
924 | /* Fx : Flag for H.263+ extra options */ |
925 | /** |
926 | * H.263 advanced intra coding / MPEG-4 AC prediction |
927 | */ |
928 | #define AV_CODEC_FLAG_AC_PRED (1 << 24) |
929 | /** |
930 | * interlaced motion estimation |
931 | */ |
932 | #define AV_CODEC_FLAG_INTERLACED_ME (1 << 29) |
933 | #define AV_CODEC_FLAG_CLOSED_GOP (1U << 31) |
934 | |
935 | /** |
936 | * Allow non spec compliant speedup tricks. |
937 | */ |
938 | #define AV_CODEC_FLAG2_FAST (1 << 0) |
939 | /** |
940 | * Skip bitstream encoding. |
941 | */ |
942 | #define AV_CODEC_FLAG2_NO_OUTPUT (1 << 2) |
943 | /** |
944 | * Place global headers at every keyframe instead of in extradata. |
945 | */ |
946 | #define AV_CODEC_FLAG2_LOCAL_HEADER (1 << 3) |
947 | |
948 | /** |
949 | * timecode is in drop frame format. DEPRECATED!!!! |
950 | */ |
951 | #define AV_CODEC_FLAG2_DROP_FRAME_TIMECODE (1 << 13) |
952 | |
953 | /** |
954 | * Input bitstream might be truncated at a packet boundaries |
955 | * instead of only at frame boundaries. |
956 | */ |
957 | #define AV_CODEC_FLAG2_CHUNKS (1 << 15) |
958 | /** |
959 | * Discard cropping information from SPS. |
960 | */ |
961 | #define AV_CODEC_FLAG2_IGNORE_CROP (1 << 16) |
962 | |
963 | /** |
964 | * Show all frames before the first keyframe |
965 | */ |
966 | #define AV_CODEC_FLAG2_SHOW_ALL (1 << 22) |
967 | /** |
968 | * Export motion vectors through frame side data |
969 | */ |
970 | #define AV_CODEC_FLAG2_EXPORT_MVS (1 << 28) |
971 | /** |
972 | * Do not skip samples and export skip information as frame side data |
973 | */ |
974 | #define AV_CODEC_FLAG2_SKIP_MANUAL (1 << 29) |
975 | /** |
976 | * Do not reset ASS ReadOrder field on flush (subtitles decoding) |
977 | */ |
978 | #define AV_CODEC_FLAG2_RO_FLUSH_NOOP (1 << 30) |
979 | |
980 | /* Unsupported options : |
981 | * Syntax Arithmetic coding (SAC) |
982 | * Reference Picture Selection |
983 | * Independent Segment Decoding */ |
984 | /* /Fx */ |
985 | /* codec capabilities */ |
986 | |
987 | /** |
988 | * Decoder can use draw_horiz_band callback. |
989 | */ |
990 | #define AV_CODEC_CAP_DRAW_HORIZ_BAND (1 << 0) |
991 | /** |
992 | * Codec uses get_buffer() for allocating buffers and supports custom allocators. |
993 | * If not set, it might not use get_buffer() at all or use operations that |
994 | * assume the buffer was allocated by avcodec_default_get_buffer. |
995 | */ |
996 | #define AV_CODEC_CAP_DR1 (1 << 1) |
997 | #define AV_CODEC_CAP_TRUNCATED (1 << 3) |
998 | /** |
999 | * Encoder or decoder requires flushing with NULL input at the end in order to |
1000 | * give the complete and correct output. |
1001 | * |
1002 | * NOTE: If this flag is not set, the codec is guaranteed to never be fed with |
1003 | * with NULL data. The user can still send NULL data to the public encode |
1004 | * or decode function, but libavcodec will not pass it along to the codec |
1005 | * unless this flag is set. |
1006 | * |
1007 | * Decoders: |
1008 | * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL, |
1009 | * avpkt->size=0 at the end to get the delayed data until the decoder no longer |
1010 | * returns frames. |
1011 | * |
1012 | * Encoders: |
1013 | * The encoder needs to be fed with NULL data at the end of encoding until the |
1014 | * encoder no longer returns data. |
1015 | * |
1016 | * NOTE: For encoders implementing the AVCodec.encode2() function, setting this |
1017 | * flag also means that the encoder must set the pts and duration for |
1018 | * each output packet. If this flag is not set, the pts and duration will |
1019 | * be determined by libavcodec from the input frame. |
1020 | */ |
1021 | #define AV_CODEC_CAP_DELAY (1 << 5) |
1022 | /** |
1023 | * Codec can be fed a final frame with a smaller size. |
1024 | * This can be used to prevent truncation of the last audio samples. |
1025 | */ |
1026 | #define AV_CODEC_CAP_SMALL_LAST_FRAME (1 << 6) |
1027 | |
1028 | #if FF_API_CAP_VDPAU |
1029 | /** |
1030 | * Codec can export data for HW decoding (VDPAU). |
1031 | */ |
1032 | #define AV_CODEC_CAP_HWACCEL_VDPAU (1 << 7) |
1033 | #endif |
1034 | |
1035 | /** |
1036 | * Codec can output multiple frames per AVPacket |
1037 | * Normally demuxers return one frame at a time, demuxers which do not do |
1038 | * are connected to a parser to split what they return into proper frames. |
1039 | * This flag is reserved to the very rare category of codecs which have a |
1040 | * bitstream that cannot be split into frames without timeconsuming |
1041 | * operations like full decoding. Demuxers carrying such bitstreams thus |
1042 | * may return multiple frames in a packet. This has many disadvantages like |
1043 | * prohibiting stream copy in many cases thus it should only be considered |
1044 | * as a last resort. |
1045 | */ |
1046 | #define AV_CODEC_CAP_SUBFRAMES (1 << 8) |
1047 | /** |
1048 | * Codec is experimental and is thus avoided in favor of non experimental |
1049 | * encoders |
1050 | */ |
1051 | #define AV_CODEC_CAP_EXPERIMENTAL (1 << 9) |
1052 | /** |
1053 | * Codec should fill in channel configuration and samplerate instead of container |
1054 | */ |
1055 | #define AV_CODEC_CAP_CHANNEL_CONF (1 << 10) |
1056 | /** |
1057 | * Codec supports frame-level multithreading. |
1058 | */ |
1059 | #define AV_CODEC_CAP_FRAME_THREADS (1 << 12) |
1060 | /** |
1061 | * Codec supports slice-based (or partition-based) multithreading. |
1062 | */ |
1063 | #define AV_CODEC_CAP_SLICE_THREADS (1 << 13) |
1064 | /** |
1065 | * Codec supports changed parameters at any point. |
1066 | */ |
1067 | #define AV_CODEC_CAP_PARAM_CHANGE (1 << 14) |
1068 | /** |
1069 | * Codec supports avctx->thread_count == 0 (auto). |
1070 | */ |
1071 | #define AV_CODEC_CAP_AUTO_THREADS (1 << 15) |
1072 | /** |
1073 | * Audio encoder supports receiving a different number of samples in each call. |
1074 | */ |
1075 | #define AV_CODEC_CAP_VARIABLE_FRAME_SIZE (1 << 16) |
1076 | /** |
1077 | * Decoder is not a preferred choice for probing. |
1078 | * This indicates that the decoder is not a good choice for probing. |
1079 | * It could for example be an expensive to spin up hardware decoder, |
1080 | * or it could simply not provide a lot of useful information about |
1081 | * the stream. |
1082 | * A decoder marked with this flag should only be used as last resort |
1083 | * choice for probing. |
1084 | */ |
1085 | #define AV_CODEC_CAP_AVOID_PROBING (1 << 17) |
1086 | /** |
1087 | * Codec is intra only. |
1088 | */ |
1089 | #define AV_CODEC_CAP_INTRA_ONLY 0x40000000 |
1090 | /** |
1091 | * Codec is lossless. |
1092 | */ |
1093 | #define AV_CODEC_CAP_LOSSLESS 0x80000000 |
1094 | |
1095 | |
1096 | #if FF_API_WITHOUT_PREFIX |
1097 | /** |
1098 | * Allow decoders to produce frames with data planes that are not aligned |
1099 | * to CPU requirements (e.g. due to cropping). |
1100 | */ |
1101 | #define CODEC_FLAG_UNALIGNED AV_CODEC_FLAG_UNALIGNED |
1102 | #define CODEC_FLAG_QSCALE AV_CODEC_FLAG_QSCALE |
1103 | #define CODEC_FLAG_4MV AV_CODEC_FLAG_4MV |
1104 | #define CODEC_FLAG_OUTPUT_CORRUPT AV_CODEC_FLAG_OUTPUT_CORRUPT |
1105 | #define CODEC_FLAG_QPEL AV_CODEC_FLAG_QPEL |
1106 | #if FF_API_GMC |
1107 | /** |
1108 | * @deprecated use the "gmc" private option of the libxvid encoder |
1109 | */ |
1110 | #define CODEC_FLAG_GMC 0x0020 ///< Use GMC. |
1111 | #endif |
1112 | #if FF_API_MV0 |
1113 | /** |
1114 | * @deprecated use the flag "mv0" in the "mpv_flags" private option of the |
1115 | * mpegvideo encoders |
1116 | */ |
1117 | #define CODEC_FLAG_MV0 0x0040 |
1118 | #endif |
1119 | #if FF_API_INPUT_PRESERVED |
1120 | /** |
1121 | * @deprecated passing reference-counted frames to the encoders replaces this |
1122 | * flag |
1123 | */ |
1124 | #define CODEC_FLAG_INPUT_PRESERVED 0x0100 |
1125 | #endif |
1126 | #define CODEC_FLAG_PASS1 AV_CODEC_FLAG_PASS1 |
1127 | #define CODEC_FLAG_PASS2 AV_CODEC_FLAG_PASS2 |
1128 | #define CODEC_FLAG_GRAY AV_CODEC_FLAG_GRAY |
1129 | #if FF_API_EMU_EDGE |
1130 | /** |
1131 | * @deprecated edges are not used/required anymore. I.e. this flag is now always |
1132 | * set. |
1133 | */ |
1134 | #define CODEC_FLAG_EMU_EDGE 0x4000 |
1135 | #endif |
1136 | #define CODEC_FLAG_PSNR AV_CODEC_FLAG_PSNR |
1137 | #define CODEC_FLAG_TRUNCATED AV_CODEC_FLAG_TRUNCATED |
1138 | |
1139 | #if FF_API_NORMALIZE_AQP |
1140 | /** |
1141 | * @deprecated use the flag "naq" in the "mpv_flags" private option of the |
1142 | * mpegvideo encoders |
1143 | */ |
1144 | #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 |
1145 | #endif |
1146 | #define CODEC_FLAG_INTERLACED_DCT AV_CODEC_FLAG_INTERLACED_DCT |
1147 | #define CODEC_FLAG_LOW_DELAY AV_CODEC_FLAG_LOW_DELAY |
1148 | #define CODEC_FLAG_GLOBAL_HEADER AV_CODEC_FLAG_GLOBAL_HEADER |
1149 | #define CODEC_FLAG_BITEXACT AV_CODEC_FLAG_BITEXACT |
1150 | #define CODEC_FLAG_AC_PRED AV_CODEC_FLAG_AC_PRED |
1151 | #define CODEC_FLAG_LOOP_FILTER AV_CODEC_FLAG_LOOP_FILTER |
1152 | #define CODEC_FLAG_INTERLACED_ME AV_CODEC_FLAG_INTERLACED_ME |
1153 | #define CODEC_FLAG_CLOSED_GOP AV_CODEC_FLAG_CLOSED_GOP |
1154 | #define CODEC_FLAG2_FAST AV_CODEC_FLAG2_FAST |
1155 | #define CODEC_FLAG2_NO_OUTPUT AV_CODEC_FLAG2_NO_OUTPUT |
1156 | #define CODEC_FLAG2_LOCAL_HEADER AV_CODEC_FLAG2_LOCAL_HEADER |
1157 | #define CODEC_FLAG2_DROP_FRAME_TIMECODE AV_CODEC_FLAG2_DROP_FRAME_TIMECODE |
1158 | #define CODEC_FLAG2_IGNORE_CROP AV_CODEC_FLAG2_IGNORE_CROP |
1159 | |
1160 | #define CODEC_FLAG2_CHUNKS AV_CODEC_FLAG2_CHUNKS |
1161 | #define CODEC_FLAG2_SHOW_ALL AV_CODEC_FLAG2_SHOW_ALL |
1162 | #define CODEC_FLAG2_EXPORT_MVS AV_CODEC_FLAG2_EXPORT_MVS |
1163 | #define CODEC_FLAG2_SKIP_MANUAL AV_CODEC_FLAG2_SKIP_MANUAL |
1164 | |
1165 | /* Unsupported options : |
1166 | * Syntax Arithmetic coding (SAC) |
1167 | * Reference Picture Selection |
1168 | * Independent Segment Decoding */ |
1169 | /* /Fx */ |
1170 | /* codec capabilities */ |
1171 | |
1172 | #define CODEC_CAP_DRAW_HORIZ_BAND AV_CODEC_CAP_DRAW_HORIZ_BAND ///< Decoder can use draw_horiz_band callback. |
1173 | /** |
1174 | * Codec uses get_buffer() for allocating buffers and supports custom allocators. |
1175 | * If not set, it might not use get_buffer() at all or use operations that |
1176 | * assume the buffer was allocated by avcodec_default_get_buffer. |
1177 | */ |
1178 | #define CODEC_CAP_DR1 AV_CODEC_CAP_DR1 |
1179 | #define CODEC_CAP_TRUNCATED AV_CODEC_CAP_TRUNCATED |
1180 | #if FF_API_XVMC |
1181 | /* Codec can export data for HW decoding. This flag indicates that |
1182 | * the codec would call get_format() with list that might contain HW accelerated |
1183 | * pixel formats (XvMC, VDPAU, VAAPI, etc). The application can pick any of them |
1184 | * including raw image format. |
1185 | * The application can use the passed context to determine bitstream version, |
1186 | * chroma format, resolution etc. |
1187 | */ |
1188 | #define CODEC_CAP_HWACCEL 0x0010 |
1189 | #endif /* FF_API_XVMC */ |
1190 | /** |
1191 | * Encoder or decoder requires flushing with NULL input at the end in order to |
1192 | * give the complete and correct output. |
1193 | * |
1194 | * NOTE: If this flag is not set, the codec is guaranteed to never be fed with |
1195 | * with NULL data. The user can still send NULL data to the public encode |
1196 | * or decode function, but libavcodec will not pass it along to the codec |
1197 | * unless this flag is set. |
1198 | * |
1199 | * Decoders: |
1200 | * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL, |
1201 | * avpkt->size=0 at the end to get the delayed data until the decoder no longer |
1202 | * returns frames. |
1203 | * |
1204 | * Encoders: |
1205 | * The encoder needs to be fed with NULL data at the end of encoding until the |
1206 | * encoder no longer returns data. |
1207 | * |
1208 | * NOTE: For encoders implementing the AVCodec.encode2() function, setting this |
1209 | * flag also means that the encoder must set the pts and duration for |
1210 | * each output packet. If this flag is not set, the pts and duration will |
1211 | * be determined by libavcodec from the input frame. |
1212 | */ |
1213 | #define CODEC_CAP_DELAY AV_CODEC_CAP_DELAY |
1214 | /** |
1215 | * Codec can be fed a final frame with a smaller size. |
1216 | * This can be used to prevent truncation of the last audio samples. |
1217 | */ |
1218 | #define CODEC_CAP_SMALL_LAST_FRAME AV_CODEC_CAP_SMALL_LAST_FRAME |
1219 | #if FF_API_CAP_VDPAU |
1220 | /** |
1221 | * Codec can export data for HW decoding (VDPAU). |
1222 | */ |
1223 | #define CODEC_CAP_HWACCEL_VDPAU AV_CODEC_CAP_HWACCEL_VDPAU |
1224 | #endif |
1225 | /** |
1226 | * Codec can output multiple frames per AVPacket |
1227 | * Normally demuxers return one frame at a time, demuxers which do not do |
1228 | * are connected to a parser to split what they return into proper frames. |
1229 | * This flag is reserved to the very rare category of codecs which have a |
1230 | * bitstream that cannot be split into frames without timeconsuming |
1231 | * operations like full decoding. Demuxers carrying such bitstreams thus |
1232 | * may return multiple frames in a packet. This has many disadvantages like |
1233 | * prohibiting stream copy in many cases thus it should only be considered |
1234 | * as a last resort. |
1235 | */ |
1236 | #define CODEC_CAP_SUBFRAMES AV_CODEC_CAP_SUBFRAMES |
1237 | /** |
1238 | * Codec is experimental and is thus avoided in favor of non experimental |
1239 | * encoders |
1240 | */ |
1241 | #define CODEC_CAP_EXPERIMENTAL AV_CODEC_CAP_EXPERIMENTAL |
1242 | /** |
1243 | * Codec should fill in channel configuration and samplerate instead of container |
1244 | */ |
1245 | #define CODEC_CAP_CHANNEL_CONF AV_CODEC_CAP_CHANNEL_CONF |
1246 | #if FF_API_NEG_LINESIZES |
1247 | /** |
1248 | * @deprecated no codecs use this capability |
1249 | */ |
1250 | #define CODEC_CAP_NEG_LINESIZES 0x0800 |
1251 | #endif |
1252 | /** |
1253 | * Codec supports frame-level multithreading. |
1254 | */ |
1255 | #define CODEC_CAP_FRAME_THREADS AV_CODEC_CAP_FRAME_THREADS |
1256 | /** |
1257 | * Codec supports slice-based (or partition-based) multithreading. |
1258 | */ |
1259 | #define CODEC_CAP_SLICE_THREADS AV_CODEC_CAP_SLICE_THREADS |
1260 | /** |
1261 | * Codec supports changed parameters at any point. |
1262 | */ |
1263 | #define CODEC_CAP_PARAM_CHANGE AV_CODEC_CAP_PARAM_CHANGE |
1264 | /** |
1265 | * Codec supports avctx->thread_count == 0 (auto). |
1266 | */ |
1267 | #define CODEC_CAP_AUTO_THREADS AV_CODEC_CAP_AUTO_THREADS |
1268 | /** |
1269 | * Audio encoder supports receiving a different number of samples in each call. |
1270 | */ |
1271 | #define CODEC_CAP_VARIABLE_FRAME_SIZE AV_CODEC_CAP_VARIABLE_FRAME_SIZE |
1272 | /** |
1273 | * Codec is intra only. |
1274 | */ |
1275 | #define CODEC_CAP_INTRA_ONLY AV_CODEC_CAP_INTRA_ONLY |
1276 | /** |
1277 | * Codec is lossless. |
1278 | */ |
1279 | #define CODEC_CAP_LOSSLESS AV_CODEC_CAP_LOSSLESS |
1280 | |
1281 | /** |
1282 | * HWAccel is experimental and is thus avoided in favor of non experimental |
1283 | * codecs |
1284 | */ |
1285 | #define HWACCEL_CODEC_CAP_EXPERIMENTAL 0x0200 |
1286 | #endif /* FF_API_WITHOUT_PREFIX */ |
1287 | |
1288 | #if FF_API_MB_TYPE |
1289 | //The following defines may change, don't expect compatibility if you use them. |
1290 | #define MB_TYPE_INTRA4x4 0x0001 |
1291 | #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific |
1292 | #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific |
1293 | #define MB_TYPE_16x16 0x0008 |
1294 | #define MB_TYPE_16x8 0x0010 |
1295 | #define MB_TYPE_8x16 0x0020 |
1296 | #define MB_TYPE_8x8 0x0040 |
1297 | #define MB_TYPE_INTERLACED 0x0080 |
1298 | #define MB_TYPE_DIRECT2 0x0100 //FIXME |
1299 | #define MB_TYPE_ACPRED 0x0200 |
1300 | #define MB_TYPE_GMC 0x0400 |
1301 | #define MB_TYPE_SKIP 0x0800 |
1302 | #define MB_TYPE_P0L0 0x1000 |
1303 | #define MB_TYPE_P1L0 0x2000 |
1304 | #define MB_TYPE_P0L1 0x4000 |
1305 | #define MB_TYPE_P1L1 0x8000 |
1306 | #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0) |
1307 | #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1) |
1308 | #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1) |
1309 | #define MB_TYPE_QUANT 0x00010000 |
1310 | #define MB_TYPE_CBP 0x00020000 |
1311 | // Note bits 24-31 are reserved for codec specific use (H.264 ref0, MPEG-1 0mv, ...) |
1312 | #endif |
1313 | |
1314 | /** |
1315 | * Pan Scan area. |
1316 | * This specifies the area which should be displayed. |
1317 | * Note there may be multiple such areas for one frame. |
1318 | */ |
1319 | typedef struct AVPanScan{ |
1320 | /** |
1321 | * id |
1322 | * - encoding: Set by user. |
1323 | * - decoding: Set by libavcodec. |
1324 | */ |
1325 | int id; |
1326 | |
1327 | /** |
1328 | * width and height in 1/16 pel |
1329 | * - encoding: Set by user. |
1330 | * - decoding: Set by libavcodec. |
1331 | */ |
1332 | int width; |
1333 | int height; |
1334 | |
1335 | /** |
1336 | * position of the top left corner in 1/16 pel for up to 3 fields/frames |
1337 | * - encoding: Set by user. |
1338 | * - decoding: Set by libavcodec. |
1339 | */ |
1340 | int16_t position[3][2]; |
1341 | }AVPanScan; |
1342 | |
1343 | /** |
1344 | * This structure describes the bitrate properties of an encoded bitstream. It |
1345 | * roughly corresponds to a subset the VBV parameters for MPEG-2 or HRD |
1346 | * parameters for H.264/HEVC. |
1347 | */ |
1348 | typedef struct AVCPBProperties { |
1349 | /** |
1350 | * Maximum bitrate of the stream, in bits per second. |
1351 | * Zero if unknown or unspecified. |
1352 | */ |
1353 | int max_bitrate; |
1354 | /** |
1355 | * Minimum bitrate of the stream, in bits per second. |
1356 | * Zero if unknown or unspecified. |
1357 | */ |
1358 | int min_bitrate; |
1359 | /** |
1360 | * Average bitrate of the stream, in bits per second. |
1361 | * Zero if unknown or unspecified. |
1362 | */ |
1363 | int avg_bitrate; |
1364 | |
1365 | /** |
1366 | * The size of the buffer to which the ratecontrol is applied, in bits. |
1367 | * Zero if unknown or unspecified. |
1368 | */ |
1369 | int buffer_size; |
1370 | |
1371 | /** |
1372 | * The delay between the time the packet this structure is associated with |
1373 | * is received and the time when it should be decoded, in periods of a 27MHz |
1374 | * clock. |
1375 | * |
1376 | * UINT64_MAX when unknown or unspecified. |
1377 | */ |
1378 | uint64_t vbv_delay; |
1379 | } AVCPBProperties; |
1380 | |
1381 | #if FF_API_QSCALE_TYPE |
1382 | #define FF_QSCALE_TYPE_MPEG1 0 |
1383 | #define FF_QSCALE_TYPE_MPEG2 1 |
1384 | #define FF_QSCALE_TYPE_H264 2 |
1385 | #define FF_QSCALE_TYPE_VP56 3 |
1386 | #endif |
1387 | |
1388 | /** |
1389 | * The decoder will keep a reference to the frame and may reuse it later. |
1390 | */ |
1391 | #define AV_GET_BUFFER_FLAG_REF (1 << 0) |
1392 | |
1393 | /** |
1394 | * @defgroup lavc_packet AVPacket |
1395 | * |
1396 | * Types and functions for working with AVPacket. |
1397 | * @{ |
1398 | */ |
1399 | enum AVPacketSideDataType { |
1400 | /** |
1401 | * An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE |
1402 | * bytes worth of palette. This side data signals that a new palette is |
1403 | * present. |
1404 | */ |
1405 | AV_PKT_DATA_PALETTE, |
1406 | |
1407 | /** |
1408 | * The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format |
1409 | * that the extradata buffer was changed and the receiving side should |
1410 | * act upon it appropriately. The new extradata is embedded in the side |
1411 | * data buffer and should be immediately used for processing the current |
1412 | * frame or packet. |
1413 | */ |
1414 | AV_PKT_DATA_NEW_EXTRADATA, |
1415 | |
1416 | /** |
1417 | * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows: |
1418 | * @code |
1419 | * u32le param_flags |
1420 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) |
1421 | * s32le channel_count |
1422 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) |
1423 | * u64le channel_layout |
1424 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) |
1425 | * s32le sample_rate |
1426 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) |
1427 | * s32le width |
1428 | * s32le height |
1429 | * @endcode |
1430 | */ |
1431 | AV_PKT_DATA_PARAM_CHANGE, |
1432 | |
1433 | /** |
1434 | * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of |
1435 | * structures with info about macroblocks relevant to splitting the |
1436 | * packet into smaller packets on macroblock edges (e.g. as for RFC 2190). |
1437 | * That is, it does not necessarily contain info about all macroblocks, |
1438 | * as long as the distance between macroblocks in the info is smaller |
1439 | * than the target payload size. |
1440 | * Each MB info structure is 12 bytes, and is laid out as follows: |
1441 | * @code |
1442 | * u32le bit offset from the start of the packet |
1443 | * u8 current quantizer at the start of the macroblock |
1444 | * u8 GOB number |
1445 | * u16le macroblock address within the GOB |
1446 | * u8 horizontal MV predictor |
1447 | * u8 vertical MV predictor |
1448 | * u8 horizontal MV predictor for block number 3 |
1449 | * u8 vertical MV predictor for block number 3 |
1450 | * @endcode |
1451 | */ |
1452 | AV_PKT_DATA_H263_MB_INFO, |
1453 | |
1454 | /** |
1455 | * This side data should be associated with an audio stream and contains |
1456 | * ReplayGain information in form of the AVReplayGain struct. |
1457 | */ |
1458 | AV_PKT_DATA_REPLAYGAIN, |
1459 | |
1460 | /** |
1461 | * This side data contains a 3x3 transformation matrix describing an affine |
1462 | * transformation that needs to be applied to the decoded video frames for |
1463 | * correct presentation. |
1464 | * |
1465 | * See libavutil/display.h for a detailed description of the data. |
1466 | */ |
1467 | AV_PKT_DATA_DISPLAYMATRIX, |
1468 | |
1469 | /** |
1470 | * This side data should be associated with a video stream and contains |
1471 | * Stereoscopic 3D information in form of the AVStereo3D struct. |
1472 | */ |
1473 | AV_PKT_DATA_STEREO3D, |
1474 | |
1475 | /** |
1476 | * This side data should be associated with an audio stream and corresponds |
1477 | * to enum AVAudioServiceType. |
1478 | */ |
1479 | AV_PKT_DATA_AUDIO_SERVICE_TYPE, |
1480 | |
1481 | /** |
1482 | * This side data contains quality related information from the encoder. |
1483 | * @code |
1484 | * u32le quality factor of the compressed frame. Allowed range is between 1 (good) and FF_LAMBDA_MAX (bad). |
1485 | * u8 picture type |
1486 | * u8 error count |
1487 | * u16 reserved |
1488 | * u64le[error count] sum of squared differences between encoder in and output |
1489 | * @endcode |
1490 | */ |
1491 | AV_PKT_DATA_QUALITY_STATS, |
1492 | |
1493 | /** |
1494 | * This side data contains an integer value representing the stream index |
1495 | * of a "fallback" track. A fallback track indicates an alternate |
1496 | * track to use when the current track can not be decoded for some reason. |
1497 | * e.g. no decoder available for codec. |
1498 | */ |
1499 | AV_PKT_DATA_FALLBACK_TRACK, |
1500 | |
1501 | /** |
1502 | * This side data corresponds to the AVCPBProperties struct. |
1503 | */ |
1504 | AV_PKT_DATA_CPB_PROPERTIES, |
1505 | |
1506 | /** |
1507 | * Recommmends skipping the specified number of samples |
1508 | * @code |
1509 | * u32le number of samples to skip from start of this packet |
1510 | * u32le number of samples to skip from end of this packet |
1511 | * u8 reason for start skip |
1512 | * u8 reason for end skip (0=padding silence, 1=convergence) |
1513 | * @endcode |
1514 | */ |
1515 | AV_PKT_DATA_SKIP_SAMPLES=70, |
1516 | |
1517 | /** |
1518 | * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that |
1519 | * the packet may contain "dual mono" audio specific to Japanese DTV |
1520 | * and if it is true, recommends only the selected channel to be used. |
1521 | * @code |
1522 | * u8 selected channels (0=mail/left, 1=sub/right, 2=both) |
1523 | * @endcode |
1524 | */ |
1525 | AV_PKT_DATA_JP_DUALMONO, |
1526 | |
1527 | /** |
1528 | * A list of zero terminated key/value strings. There is no end marker for |
1529 | * the list, so it is required to rely on the side data size to stop. |
1530 | */ |
1531 | AV_PKT_DATA_STRINGS_METADATA, |
1532 | |
1533 | /** |
1534 | * Subtitle event position |
1535 | * @code |
1536 | * u32le x1 |
1537 | * u32le y1 |
1538 | * u32le x2 |
1539 | * u32le y2 |
1540 | * @endcode |
1541 | */ |
1542 | AV_PKT_DATA_SUBTITLE_POSITION, |
1543 | |
1544 | /** |
1545 | * Data found in BlockAdditional element of matroska container. There is |
1546 | * no end marker for the data, so it is required to rely on the side data |
1547 | * size to recognize the end. 8 byte id (as found in BlockAddId) followed |
1548 | * by data. |
1549 | */ |
1550 | AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL, |
1551 | |
1552 | /** |
1553 | * The optional first identifier line of a WebVTT cue. |
1554 | */ |
1555 | AV_PKT_DATA_WEBVTT_IDENTIFIER, |
1556 | |
1557 | /** |
1558 | * The optional settings (rendering instructions) that immediately |
1559 | * follow the timestamp specifier of a WebVTT cue. |
1560 | */ |
1561 | AV_PKT_DATA_WEBVTT_SETTINGS, |
1562 | |
1563 | /** |
1564 | * A list of zero terminated key/value strings. There is no end marker for |
1565 | * the list, so it is required to rely on the side data size to stop. This |
1566 | * side data includes updated metadata which appeared in the stream. |
1567 | */ |
1568 | AV_PKT_DATA_METADATA_UPDATE, |
1569 | |
1570 | /** |
1571 | * MPEGTS stream ID, this is required to pass the stream ID |
1572 | * information from the demuxer to the corresponding muxer. |
1573 | */ |
1574 | AV_PKT_DATA_MPEGTS_STREAM_ID, |
1575 | |
1576 | /** |
1577 | * Mastering display metadata (based on SMPTE-2086:2014). This metadata |
1578 | * should be associated with a video stream and containts data in the form |
1579 | * of the AVMasteringDisplayMetadata struct. |
1580 | */ |
1581 | AV_PKT_DATA_MASTERING_DISPLAY_METADATA, |
1582 | |
1583 | /** |
1584 | * This side data should be associated with a video stream and corresponds |
1585 | * to the AVSphericalMapping structure. |
1586 | */ |
1587 | AV_PKT_DATA_SPHERICAL, |
1588 | }; |
1589 | |
1590 | #define AV_PKT_DATA_QUALITY_FACTOR AV_PKT_DATA_QUALITY_STATS //DEPRECATED |
1591 | |
1592 | typedef struct AVPacketSideData { |
1593 | uint8_t *data; |
1594 | int size; |
1595 | enum AVPacketSideDataType type; |
1596 | } AVPacketSideData; |
1597 | |
1598 | /** |
1599 | * This structure stores compressed data. It is typically exported by demuxers |
1600 | * and then passed as input to decoders, or received as output from encoders and |
1601 | * then passed to muxers. |
1602 | * |
1603 | * For video, it should typically contain one compressed frame. For audio it may |
1604 | * contain several compressed frames. Encoders are allowed to output empty |
1605 | * packets, with no compressed data, containing only side data |
1606 | * (e.g. to update some stream parameters at the end of encoding). |
1607 | * |
1608 | * AVPacket is one of the few structs in FFmpeg, whose size is a part of public |
1609 | * ABI. Thus it may be allocated on stack and no new fields can be added to it |
1610 | * without libavcodec and libavformat major bump. |
1611 | * |
1612 | * The semantics of data ownership depends on the buf field. |
1613 | * If it is set, the packet data is dynamically allocated and is |
1614 | * valid indefinitely until a call to av_packet_unref() reduces the |
1615 | * reference count to 0. |
1616 | * |
1617 | * If the buf field is not set av_packet_ref() would make a copy instead |
1618 | * of increasing the reference count. |
1619 | * |
1620 | * The side data is always allocated with av_malloc(), copied by |
1621 | * av_packet_ref() and freed by av_packet_unref(). |
1622 | * |
1623 | * @see av_packet_ref |
1624 | * @see av_packet_unref |
1625 | */ |
1626 | typedef struct AVPacket { |
1627 | /** |
1628 | * A reference to the reference-counted buffer where the packet data is |
1629 | * stored. |
1630 | * May be NULL, then the packet data is not reference-counted. |
1631 | */ |
1632 | AVBufferRef *buf; |
1633 | /** |
1634 | * Presentation timestamp in AVStream->time_base units; the time at which |
1635 | * the decompressed packet will be presented to the user. |
1636 | * Can be AV_NOPTS_VALUE if it is not stored in the file. |
1637 | * pts MUST be larger or equal to dts as presentation cannot happen before |
1638 | * decompression, unless one wants to view hex dumps. Some formats misuse |
1639 | * the terms dts and pts/cts to mean something different. Such timestamps |
1640 | * must be converted to true pts/dts before they are stored in AVPacket. |
1641 | */ |
1642 | int64_t pts; |
1643 | /** |
1644 | * Decompression timestamp in AVStream->time_base units; the time at which |
1645 | * the packet is decompressed. |
1646 | * Can be AV_NOPTS_VALUE if it is not stored in the file. |
1647 | */ |
1648 | int64_t dts; |
1649 | uint8_t *data; |
1650 | int size; |
1651 | int stream_index; |
1652 | /** |
1653 | * A combination of AV_PKT_FLAG values |
1654 | */ |
1655 | int flags; |
1656 | /** |
1657 | * Additional packet data that can be provided by the container. |
1658 | * Packet can contain several types of side information. |
1659 | */ |
1660 | AVPacketSideData *side_data; |
1661 | int side_data_elems; |
1662 | |
1663 | /** |
1664 | * Duration of this packet in AVStream->time_base units, 0 if unknown. |
1665 | * Equals next_pts - this_pts in presentation order. |
1666 | */ |
1667 | int64_t duration; |
1668 | |
1669 | int64_t pos; ///< byte position in stream, -1 if unknown |
1670 | |
1671 | #if FF_API_CONVERGENCE_DURATION |
1672 | /** |
1673 | * @deprecated Same as the duration field, but as int64_t. This was required |
1674 | * for Matroska subtitles, whose duration values could overflow when the |
1675 | * duration field was still an int. |
1676 | */ |
1677 | attribute_deprecated |
1678 | int64_t convergence_duration; |
1679 | #endif |
1680 | } AVPacket; |
1681 | #define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe |
1682 | #define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted |
1683 | /** |
1684 | * Flag is used to discard packets which are required to maintain valid |
1685 | * decoder state but are not required for output and should be dropped |
1686 | * after decoding. |
1687 | **/ |
1688 | #define AV_PKT_FLAG_DISCARD 0x0004 |
1689 | |
1690 | enum AVSideDataParamChangeFlags { |
1691 | AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001, |
1692 | AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002, |
1693 | AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004, |
1694 | AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008, |
1695 | }; |
1696 | /** |
1697 | * @} |
1698 | */ |
1699 | |
1700 | struct AVCodecInternal; |
1701 | |
1702 | enum AVFieldOrder { |
1703 | AV_FIELD_UNKNOWN, |
1704 | AV_FIELD_PROGRESSIVE, |
1705 | AV_FIELD_TT, //< Top coded_first, top displayed first |
1706 | AV_FIELD_BB, //< Bottom coded first, bottom displayed first |
1707 | AV_FIELD_TB, //< Top coded first, bottom displayed first |
1708 | AV_FIELD_BT, //< Bottom coded first, top displayed first |
1709 | }; |
1710 | |
1711 | /** |
1712 | * main external API structure. |
1713 | * New fields can be added to the end with minor version bumps. |
1714 | * Removal, reordering and changes to existing fields require a major |
1715 | * version bump. |
1716 | * You can use AVOptions (av_opt* / av_set/get*()) to access these fields from user |
1717 | * applications. |
1718 | * The name string for AVOptions options matches the associated command line |
1719 | * parameter name and can be found in libavcodec/options_table.h |
1720 | * The AVOption/command line parameter names differ in some cases from the C |
1721 | * structure field names for historic reasons or brevity. |
1722 | * sizeof(AVCodecContext) must not be used outside libav*. |
1723 | */ |
1724 | typedef struct AVCodecContext { |
1725 | /** |
1726 | * information on struct for av_log |
1727 | * - set by avcodec_alloc_context3 |
1728 | */ |
1729 | const AVClass *av_class; |
1730 | int log_level_offset; |
1731 | |
1732 | enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */ |
1733 | const struct AVCodec *codec; |
1734 | #if FF_API_CODEC_NAME |
1735 | /** |
1736 | * @deprecated this field is not used for anything in libavcodec |
1737 | */ |
1738 | attribute_deprecated |
1739 | char codec_name[32]; |
1740 | #endif |
1741 | enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */ |
1742 | |
1743 | /** |
1744 | * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A'). |
1745 | * This is used to work around some encoder bugs. |
1746 | * A demuxer should set this to what is stored in the field used to identify the codec. |
1747 | * If there are multiple such fields in a container then the demuxer should choose the one |
1748 | * which maximizes the information about the used codec. |
1749 | * If the codec tag field in a container is larger than 32 bits then the demuxer should |
1750 | * remap the longer ID to 32 bits with a table or other structure. Alternatively a new |
1751 | * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated |
1752 | * first. |
1753 | * - encoding: Set by user, if not then the default based on codec_id will be used. |
1754 | * - decoding: Set by user, will be converted to uppercase by libavcodec during init. |
1755 | */ |
1756 | unsigned int codec_tag; |
1757 | |
1758 | #if FF_API_STREAM_CODEC_TAG |
1759 | /** |
1760 | * @deprecated this field is unused |
1761 | */ |
1762 | attribute_deprecated |
1763 | unsigned int stream_codec_tag; |
1764 | #endif |
1765 | |
1766 | void *priv_data; |
1767 | |
1768 | /** |
1769 | * Private context used for internal data. |
1770 | * |
1771 | * Unlike priv_data, this is not codec-specific. It is used in general |
1772 | * libavcodec functions. |
1773 | */ |
1774 | struct AVCodecInternal *internal; |
1775 | |
1776 | /** |
1777 | * Private data of the user, can be used to carry app specific stuff. |
1778 | * - encoding: Set by user. |
1779 | * - decoding: Set by user. |
1780 | */ |
1781 | void *opaque; |
1782 | |
1783 | /** |
1784 | * the average bitrate |
1785 | * - encoding: Set by user; unused for constant quantizer encoding. |
1786 | * - decoding: Set by user, may be overwritten by libavcodec |
1787 | * if this info is available in the stream |
1788 | */ |
1789 | int64_t bit_rate; |
1790 | |
1791 | /** |
1792 | * number of bits the bitstream is allowed to diverge from the reference. |
1793 | * the reference can be CBR (for CBR pass1) or VBR (for pass2) |
1794 | * - encoding: Set by user; unused for constant quantizer encoding. |
1795 | * - decoding: unused |
1796 | */ |
1797 | int bit_rate_tolerance; |
1798 | |
1799 | /** |
1800 | * Global quality for codecs which cannot change it per frame. |
1801 | * This should be proportional to MPEG-1/2/4 qscale. |
1802 | * - encoding: Set by user. |
1803 | * - decoding: unused |
1804 | */ |
1805 | int global_quality; |
1806 | |
1807 | /** |
1808 | * - encoding: Set by user. |
1809 | * - decoding: unused |
1810 | */ |
1811 | int compression_level; |
1812 | #define FF_COMPRESSION_DEFAULT -1 |
1813 | |
1814 | /** |
1815 | * AV_CODEC_FLAG_*. |
1816 | * - encoding: Set by user. |
1817 | * - decoding: Set by user. |
1818 | */ |
1819 | int flags; |
1820 | |
1821 | /** |
1822 | * AV_CODEC_FLAG2_* |
1823 | * - encoding: Set by user. |
1824 | * - decoding: Set by user. |
1825 | */ |
1826 | int flags2; |
1827 | |
1828 | /** |
1829 | * some codecs need / can use extradata like Huffman tables. |
1830 | * MJPEG: Huffman tables |
1831 | * rv10: additional flags |
1832 | * MPEG-4: global headers (they can be in the bitstream or here) |
1833 | * The allocated memory should be AV_INPUT_BUFFER_PADDING_SIZE bytes larger |
1834 | * than extradata_size to avoid problems if it is read with the bitstream reader. |
1835 | * The bytewise contents of extradata must not depend on the architecture or CPU endianness. |
1836 | * - encoding: Set/allocated/freed by libavcodec. |
1837 | * - decoding: Set/allocated/freed by user. |
1838 | */ |
1839 | uint8_t *extradata; |
1840 | int extradata_size; |
1841 | |
1842 | /** |
1843 | * This is the fundamental unit of time (in seconds) in terms |
1844 | * of which frame timestamps are represented. For fixed-fps content, |
1845 | * timebase should be 1/framerate and timestamp increments should be |
1846 | * identically 1. |
1847 | * This often, but not always is the inverse of the frame rate or field rate |
1848 | * for video. 1/time_base is not the average frame rate if the frame rate is not |
1849 | * constant. |
1850 | * |
1851 | * Like containers, elementary streams also can store timestamps, 1/time_base |
1852 | * is the unit in which these timestamps are specified. |
1853 | * As example of such codec time base see ISO/IEC 14496-2:2001(E) |
1854 | * vop_time_increment_resolution and fixed_vop_rate |
1855 | * (fixed_vop_rate == 0 implies that it is different from the framerate) |
1856 | * |
1857 | * - encoding: MUST be set by user. |
1858 | * - decoding: the use of this field for decoding is deprecated. |
1859 | * Use framerate instead. |
1860 | */ |
1861 | AVRational time_base; |
1862 | |
1863 | /** |
1864 | * For some codecs, the time base is closer to the field rate than the frame rate. |
1865 | * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration |
1866 | * if no telecine is used ... |
1867 | * |
1868 | * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2. |
1869 | */ |
1870 | int ticks_per_frame; |
1871 | |
1872 | /** |
1873 | * Codec delay. |
1874 | * |
1875 | * Encoding: Number of frames delay there will be from the encoder input to |
1876 | * the decoder output. (we assume the decoder matches the spec) |
1877 | * Decoding: Number of frames delay in addition to what a standard decoder |
1878 | * as specified in the spec would produce. |
1879 | * |
1880 | * Video: |
1881 | * Number of frames the decoded output will be delayed relative to the |
1882 | * encoded input. |
1883 | * |
1884 | * Audio: |
1885 | * For encoding, this field is unused (see initial_padding). |
1886 | * |
1887 | * For decoding, this is the number of samples the decoder needs to |
1888 | * output before the decoder's output is valid. When seeking, you should |
1889 | * start decoding this many samples prior to your desired seek point. |
1890 | * |
1891 | * - encoding: Set by libavcodec. |
1892 | * - decoding: Set by libavcodec. |
1893 | */ |
1894 | int delay; |
1895 | |
1896 | |
1897 | /* video only */ |
1898 | /** |
1899 | * picture width / height. |
1900 | * |
1901 | * @note Those fields may not match the values of the last |
1902 | * AVFrame output by avcodec_decode_video2 due frame |
1903 | * reordering. |
1904 | * |
1905 | * - encoding: MUST be set by user. |
1906 | * - decoding: May be set by the user before opening the decoder if known e.g. |
1907 | * from the container. Some decoders will require the dimensions |
1908 | * to be set by the caller. During decoding, the decoder may |
1909 | * overwrite those values as required while parsing the data. |
1910 | */ |
1911 | int width, height; |
1912 | |
1913 | /** |
1914 | * Bitstream width / height, may be different from width/height e.g. when |
1915 | * the decoded frame is cropped before being output or lowres is enabled. |
1916 | * |
1917 | * @note Those field may not match the value of the last |
1918 | * AVFrame output by avcodec_receive_frame() due frame |
1919 | * reordering. |
1920 | * |
1921 | * - encoding: unused |
1922 | * - decoding: May be set by the user before opening the decoder if known |
1923 | * e.g. from the container. During decoding, the decoder may |
1924 | * overwrite those values as required while parsing the data. |
1925 | */ |
1926 | int coded_width, coded_height; |
1927 | |
1928 | #if FF_API_ASPECT_EXTENDED |
1929 | #define FF_ASPECT_EXTENDED 15 |
1930 | #endif |
1931 | |
1932 | /** |
1933 | * the number of pictures in a group of pictures, or 0 for intra_only |
1934 | * - encoding: Set by user. |
1935 | * - decoding: unused |
1936 | */ |
1937 | int gop_size; |
1938 | |
1939 | /** |
1940 | * Pixel format, see AV_PIX_FMT_xxx. |
1941 | * May be set by the demuxer if known from headers. |
1942 | * May be overridden by the decoder if it knows better. |
1943 | * |
1944 | * @note This field may not match the value of the last |
1945 | * AVFrame output by avcodec_receive_frame() due frame |
1946 | * reordering. |
1947 | * |
1948 | * - encoding: Set by user. |
1949 | * - decoding: Set by user if known, overridden by libavcodec while |
1950 | * parsing the data. |
1951 | */ |
1952 | enum AVPixelFormat pix_fmt; |
1953 | |
1954 | #if FF_API_MOTION_EST |
1955 | /** |
1956 | * This option does nothing |
1957 | * @deprecated use codec private options instead |
1958 | */ |
1959 | attribute_deprecated int me_method; |
1960 | #endif |
1961 | |
1962 | /** |
1963 | * If non NULL, 'draw_horiz_band' is called by the libavcodec |
1964 | * decoder to draw a horizontal band. It improves cache usage. Not |
1965 | * all codecs can do that. You must check the codec capabilities |
1966 | * beforehand. |
1967 | * When multithreading is used, it may be called from multiple threads |
1968 | * at the same time; threads might draw different parts of the same AVFrame, |
1969 | * or multiple AVFrames, and there is no guarantee that slices will be drawn |
1970 | * in order. |
1971 | * The function is also used by hardware acceleration APIs. |
1972 | * It is called at least once during frame decoding to pass |
1973 | * the data needed for hardware render. |
1974 | * In that mode instead of pixel data, AVFrame points to |
1975 | * a structure specific to the acceleration API. The application |
1976 | * reads the structure and can change some fields to indicate progress |
1977 | * or mark state. |
1978 | * - encoding: unused |
1979 | * - decoding: Set by user. |
1980 | * @param height the height of the slice |
1981 | * @param y the y position of the slice |
1982 | * @param type 1->top field, 2->bottom field, 3->frame |
1983 | * @param offset offset into the AVFrame.data from which the slice should be read |
1984 | */ |
1985 | void (*draw_horiz_band)(struct AVCodecContext *s, |
1986 | const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], |
1987 | int y, int type, int height); |
1988 | |
1989 | /** |
1990 | * callback to negotiate the pixelFormat |
1991 | * @param fmt is the list of formats which are supported by the codec, |
1992 | * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. |
1993 | * The first is always the native one. |
1994 | * @note The callback may be called again immediately if initialization for |
1995 | * the selected (hardware-accelerated) pixel format failed. |
1996 | * @warning Behavior is undefined if the callback returns a value not |
1997 | * in the fmt list of formats. |
1998 | * @return the chosen format |
1999 | * - encoding: unused |
2000 | * - decoding: Set by user, if not set the native format will be chosen. |
2001 | */ |
2002 | enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt); |
2003 | |
2004 | /** |
2005 | * maximum number of B-frames between non-B-frames |
2006 | * Note: The output will be delayed by max_b_frames+1 relative to the input. |
2007 | * - encoding: Set by user. |
2008 | * - decoding: unused |
2009 | */ |
2010 | int max_b_frames; |
2011 | |
2012 | /** |
2013 | * qscale factor between IP and B-frames |
2014 | * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset). |
2015 | * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset). |
2016 | * - encoding: Set by user. |
2017 | * - decoding: unused |
2018 | */ |
2019 | float b_quant_factor; |
2020 | |
2021 | #if FF_API_RC_STRATEGY |
2022 | /** @deprecated use codec private option instead */ |
2023 | attribute_deprecated int rc_strategy; |
2024 | #define FF_RC_STRATEGY_XVID 1 |
2025 | #endif |
2026 | |
2027 | #if FF_API_PRIVATE_OPT |
2028 | /** @deprecated use encoder private options instead */ |
2029 | attribute_deprecated |
2030 | int b_frame_strategy; |
2031 | #endif |
2032 | |
2033 | /** |
2034 | * qscale offset between IP and B-frames |
2035 | * - encoding: Set by user. |
2036 | * - decoding: unused |
2037 | */ |
2038 | float b_quant_offset; |
2039 | |
2040 | /** |
2041 | * Size of the frame reordering buffer in the decoder. |
2042 | * For MPEG-2 it is 1 IPB or 0 low delay IP. |
2043 | * - encoding: Set by libavcodec. |
2044 | * - decoding: Set by libavcodec. |
2045 | */ |
2046 | int has_b_frames; |
2047 | |
2048 | #if FF_API_PRIVATE_OPT |
2049 | /** @deprecated use encoder private options instead */ |
2050 | attribute_deprecated |
2051 | int mpeg_quant; |
2052 | #endif |
2053 | |
2054 | /** |
2055 | * qscale factor between P- and I-frames |
2056 | * If > 0 then the last P-frame quantizer will be used (q = lastp_q * factor + offset). |
2057 | * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset). |
2058 | * - encoding: Set by user. |
2059 | * - decoding: unused |
2060 | */ |
2061 | float i_quant_factor; |
2062 | |
2063 | /** |
2064 | * qscale offset between P and I-frames |
2065 | * - encoding: Set by user. |
2066 | * - decoding: unused |
2067 | */ |
2068 | float i_quant_offset; |
2069 | |
2070 | /** |
2071 | * luminance masking (0-> disabled) |
2072 | * - encoding: Set by user. |
2073 | * - decoding: unused |
2074 | */ |
2075 | float lumi_masking; |
2076 | |
2077 | /** |
2078 | * temporary complexity masking (0-> disabled) |
2079 | * - encoding: Set by user. |
2080 | * - decoding: unused |
2081 | */ |
2082 | float temporal_cplx_masking; |
2083 | |
2084 | /** |
2085 | * spatial complexity masking (0-> disabled) |
2086 | * - encoding: Set by user. |
2087 | * - decoding: unused |
2088 | */ |
2089 | float spatial_cplx_masking; |
2090 | |
2091 | /** |
2092 | * p block masking (0-> disabled) |
2093 | * - encoding: Set by user. |
2094 | * - decoding: unused |
2095 | */ |
2096 | float p_masking; |
2097 | |
2098 | /** |
2099 | * darkness masking (0-> disabled) |
2100 | * - encoding: Set by user. |
2101 | * - decoding: unused |
2102 | */ |
2103 | float dark_masking; |
2104 | |
2105 | /** |
2106 | * slice count |
2107 | * - encoding: Set by libavcodec. |
2108 | * - decoding: Set by user (or 0). |
2109 | */ |
2110 | int slice_count; |
2111 | |
2112 | #if FF_API_PRIVATE_OPT |
2113 | /** @deprecated use encoder private options instead */ |
2114 | attribute_deprecated |
2115 | int prediction_method; |
2116 | #define FF_PRED_LEFT 0 |
2117 | #define FF_PRED_PLANE 1 |
2118 | #define FF_PRED_MEDIAN 2 |
2119 | #endif |
2120 | |
2121 | /** |
2122 | * slice offsets in the frame in bytes |
2123 | * - encoding: Set/allocated by libavcodec. |
2124 | * - decoding: Set/allocated by user (or NULL). |
2125 | */ |
2126 | int *slice_offset; |
2127 | |
2128 | /** |
2129 | * sample aspect ratio (0 if unknown) |
2130 | * That is the width of a pixel divided by the height of the pixel. |
2131 | * Numerator and denominator must be relatively prime and smaller than 256 for some video standards. |
2132 | * - encoding: Set by user. |
2133 | * - decoding: Set by libavcodec. |
2134 | */ |
2135 | AVRational sample_aspect_ratio; |
2136 | |
2137 | /** |
2138 | * motion estimation comparison function |
2139 | * - encoding: Set by user. |
2140 | * - decoding: unused |
2141 | */ |
2142 | int me_cmp; |
2143 | /** |
2144 | * subpixel motion estimation comparison function |
2145 | * - encoding: Set by user. |
2146 | * - decoding: unused |
2147 | */ |
2148 | int me_sub_cmp; |
2149 | /** |
2150 | * macroblock comparison function (not supported yet) |
2151 | * - encoding: Set by user. |
2152 | * - decoding: unused |
2153 | */ |
2154 | int mb_cmp; |
2155 | /** |
2156 | * interlaced DCT comparison function |
2157 | * - encoding: Set by user. |
2158 | * - decoding: unused |
2159 | */ |
2160 | int ildct_cmp; |
2161 | #define FF_CMP_SAD 0 |
2162 | #define FF_CMP_SSE 1 |
2163 | #define FF_CMP_SATD 2 |
2164 | #define FF_CMP_DCT 3 |
2165 | #define FF_CMP_PSNR 4 |
2166 | #define FF_CMP_BIT 5 |
2167 | #define FF_CMP_RD 6 |
2168 | #define FF_CMP_ZERO 7 |
2169 | #define FF_CMP_VSAD 8 |
2170 | #define FF_CMP_VSSE 9 |
2171 | #define FF_CMP_NSSE 10 |
2172 | #define FF_CMP_W53 11 |
2173 | #define FF_CMP_W97 12 |
2174 | #define FF_CMP_DCTMAX 13 |
2175 | #define FF_CMP_DCT264 14 |
2176 | #define FF_CMP_MEDIAN_SAD 15 |
2177 | #define FF_CMP_CHROMA 256 |
2178 | |
2179 | /** |
2180 | * ME diamond size & shape |
2181 | * - encoding: Set by user. |
2182 | * - decoding: unused |
2183 | */ |
2184 | int dia_size; |
2185 | |
2186 | /** |
2187 | * amount of previous MV predictors (2a+1 x 2a+1 square) |
2188 | * - encoding: Set by user. |
2189 | * - decoding: unused |
2190 | */ |
2191 | int last_predictor_count; |
2192 | |
2193 | #if FF_API_PRIVATE_OPT |
2194 | /** @deprecated use encoder private options instead */ |
2195 | attribute_deprecated |
2196 | int pre_me; |
2197 | #endif |
2198 | |
2199 | /** |
2200 | * motion estimation prepass comparison function |
2201 | * - encoding: Set by user. |
2202 | * - decoding: unused |
2203 | */ |
2204 | int me_pre_cmp; |
2205 | |
2206 | /** |
2207 | * ME prepass diamond size & shape |
2208 | * - encoding: Set by user. |
2209 | * - decoding: unused |
2210 | */ |
2211 | int pre_dia_size; |
2212 | |
2213 | /** |
2214 | * subpel ME quality |
2215 | * - encoding: Set by user. |
2216 | * - decoding: unused |
2217 | */ |
2218 | int me_subpel_quality; |
2219 | |
2220 | #if FF_API_AFD |
2221 | /** |
2222 | * DTG active format information (additional aspect ratio |
2223 | * information only used in DVB MPEG-2 transport streams) |
2224 | * 0 if not set. |
2225 | * |
2226 | * - encoding: unused |
2227 | * - decoding: Set by decoder. |
2228 | * @deprecated Deprecated in favor of AVSideData |
2229 | */ |
2230 | attribute_deprecated int dtg_active_format; |
2231 | #define FF_DTG_AFD_SAME 8 |
2232 | #define FF_DTG_AFD_4_3 9 |
2233 | #define FF_DTG_AFD_16_9 10 |
2234 | #define FF_DTG_AFD_14_9 11 |
2235 | #define FF_DTG_AFD_4_3_SP_14_9 13 |
2236 | #define FF_DTG_AFD_16_9_SP_14_9 14 |
2237 | #define FF_DTG_AFD_SP_4_3 15 |
2238 | #endif /* FF_API_AFD */ |
2239 | |
2240 | /** |
2241 | * maximum motion estimation search range in subpel units |
2242 | * If 0 then no limit. |
2243 | * |
2244 | * - encoding: Set by user. |
2245 | * - decoding: unused |
2246 | */ |
2247 | int me_range; |
2248 | |
2249 | #if FF_API_QUANT_BIAS |
2250 | /** |
2251 | * @deprecated use encoder private option instead |
2252 | */ |
2253 | attribute_deprecated int intra_quant_bias; |
2254 | #define FF_DEFAULT_QUANT_BIAS 999999 |
2255 | |
2256 | /** |
2257 | * @deprecated use encoder private option instead |
2258 | */ |
2259 | attribute_deprecated int inter_quant_bias; |
2260 | #endif |
2261 | |
2262 | /** |
2263 | * slice flags |
2264 | * - encoding: unused |
2265 | * - decoding: Set by user. |
2266 | */ |
2267 | int slice_flags; |
2268 | #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display |
2269 | #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG-2 field pics) |
2270 | #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1) |
2271 | |
2272 | #if FF_API_XVMC |
2273 | /** |
2274 | * XVideo Motion Acceleration |
2275 | * - encoding: forbidden |
2276 | * - decoding: set by decoder |
2277 | * @deprecated XvMC doesn't need it anymore. |
2278 | */ |
2279 | attribute_deprecated int xvmc_acceleration; |
2280 | #endif /* FF_API_XVMC */ |
2281 | |
2282 | /** |
2283 | * macroblock decision mode |
2284 | * - encoding: Set by user. |
2285 | * - decoding: unused |
2286 | */ |
2287 | int mb_decision; |
2288 | #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp |
2289 | #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits |
2290 | #define FF_MB_DECISION_RD 2 ///< rate distortion |
2291 | |
2292 | /** |
2293 | * custom intra quantization matrix |
2294 | * - encoding: Set by user, can be NULL. |
2295 | * - decoding: Set by libavcodec. |
2296 | */ |
2297 | uint16_t *intra_matrix; |
2298 | |
2299 | /** |
2300 | * custom inter quantization matrix |
2301 | * - encoding: Set by user, can be NULL. |
2302 | * - decoding: Set by libavcodec. |
2303 | */ |
2304 | uint16_t *inter_matrix; |
2305 | |
2306 | #if FF_API_PRIVATE_OPT |
2307 | /** @deprecated use encoder private options instead */ |
2308 | attribute_deprecated |
2309 | int scenechange_threshold; |
2310 | |
2311 | /** @deprecated use encoder private options instead */ |
2312 | attribute_deprecated |
2313 | int noise_reduction; |
2314 | #endif |
2315 | |
2316 | #if FF_API_MPV_OPT |
2317 | /** |
2318 | * @deprecated this field is unused |
2319 | */ |
2320 | attribute_deprecated |
2321 | int me_threshold; |
2322 | |
2323 | /** |
2324 | * @deprecated this field is unused |
2325 | */ |
2326 | attribute_deprecated |
2327 | int mb_threshold; |
2328 | #endif |
2329 | |
2330 | /** |
2331 | * precision of the intra DC coefficient - 8 |
2332 | * - encoding: Set by user. |
2333 | * - decoding: Set by libavcodec |
2334 | */ |
2335 | int intra_dc_precision; |
2336 | |
2337 | /** |
2338 | * Number of macroblock rows at the top which are skipped. |
2339 | * - encoding: unused |
2340 | * - decoding: Set by user. |
2341 | */ |
2342 | int skip_top; |
2343 | |
2344 | /** |
2345 | * Number of macroblock rows at the bottom which are skipped. |
2346 | * - encoding: unused |
2347 | * - decoding: Set by user. |
2348 | */ |
2349 | int skip_bottom; |
2350 | |
2351 | #if FF_API_MPV_OPT |
2352 | /** |
2353 | * @deprecated use encoder private options instead |
2354 | */ |
2355 | attribute_deprecated |
2356 | float border_masking; |
2357 | #endif |
2358 | |
2359 | /** |
2360 | * minimum MB Lagrange multiplier |
2361 | * - encoding: Set by user. |
2362 | * - decoding: unused |
2363 | */ |
2364 | int mb_lmin; |
2365 | |
2366 | /** |
2367 | * maximum MB Lagrange multiplier |
2368 | * - encoding: Set by user. |
2369 | * - decoding: unused |
2370 | */ |
2371 | int mb_lmax; |
2372 | |
2373 | #if FF_API_PRIVATE_OPT |
2374 | /** |
2375 | * @deprecated use encoder private options instead |
2376 | */ |
2377 | attribute_deprecated |
2378 | int me_penalty_compensation; |
2379 | #endif |
2380 | |
2381 | /** |
2382 | * - encoding: Set by user. |
2383 | * - decoding: unused |
2384 | */ |
2385 | int bidir_refine; |
2386 | |
2387 | #if FF_API_PRIVATE_OPT |
2388 | /** @deprecated use encoder private options instead */ |
2389 | attribute_deprecated |
2390 | int brd_scale; |
2391 | #endif |
2392 | |
2393 | /** |
2394 | * minimum GOP size |
2395 | * - encoding: Set by user. |
2396 | * - decoding: unused |
2397 | */ |
2398 | int keyint_min; |
2399 | |
2400 | /** |
2401 | * number of reference frames |
2402 | * - encoding: Set by user. |
2403 | * - decoding: Set by lavc. |
2404 | */ |
2405 | int refs; |
2406 | |
2407 | #if FF_API_PRIVATE_OPT |
2408 | /** @deprecated use encoder private options instead */ |
2409 | attribute_deprecated |
2410 | int chromaoffset; |
2411 | #endif |
2412 | |
2413 | #if FF_API_UNUSED_MEMBERS |
2414 | /** |
2415 | * Multiplied by qscale for each frame and added to scene_change_score. |
2416 | * - encoding: Set by user. |
2417 | * - decoding: unused |
2418 | */ |
2419 | attribute_deprecated int scenechange_factor; |
2420 | #endif |
2421 | |
2422 | /** |
2423 | * Note: Value depends upon the compare function used for fullpel ME. |
2424 | * - encoding: Set by user. |
2425 | * - decoding: unused |
2426 | */ |
2427 | int mv0_threshold; |
2428 | |
2429 | #if FF_API_PRIVATE_OPT |
2430 | /** @deprecated use encoder private options instead */ |
2431 | attribute_deprecated |
2432 | int b_sensitivity; |
2433 | #endif |
2434 | |
2435 | /** |
2436 | * Chromaticity coordinates of the source primaries. |
2437 | * - encoding: Set by user |
2438 | * - decoding: Set by libavcodec |
2439 | */ |
2440 | enum AVColorPrimaries color_primaries; |
2441 | |
2442 | /** |
2443 | * Color Transfer Characteristic. |
2444 | * - encoding: Set by user |
2445 | * - decoding: Set by libavcodec |
2446 | */ |
2447 | enum AVColorTransferCharacteristic color_trc; |
2448 | |
2449 | /** |
2450 | * YUV colorspace type. |
2451 | * - encoding: Set by user |
2452 | * - decoding: Set by libavcodec |
2453 | */ |
2454 | enum AVColorSpace colorspace; |
2455 | |
2456 | /** |
2457 | * MPEG vs JPEG YUV range. |
2458 | * - encoding: Set by user |
2459 | * - decoding: Set by libavcodec |
2460 | */ |
2461 | enum AVColorRange color_range; |
2462 | |
2463 | /** |
2464 | * This defines the location of chroma samples. |
2465 | * - encoding: Set by user |
2466 | * - decoding: Set by libavcodec |
2467 | */ |
2468 | enum AVChromaLocation chroma_sample_location; |
2469 | |
2470 | /** |
2471 | * Number of slices. |
2472 | * Indicates number of picture subdivisions. Used for parallelized |
2473 | * decoding. |
2474 | * - encoding: Set by user |
2475 | * - decoding: unused |
2476 | */ |
2477 | int slices; |
2478 | |
2479 | /** Field order |
2480 | * - encoding: set by libavcodec |
2481 | * - decoding: Set by user. |
2482 | */ |
2483 | enum AVFieldOrder field_order; |
2484 | |
2485 | /* audio only */ |
2486 | int sample_rate; ///< samples per second |
2487 | int channels; ///< number of audio channels |
2488 | |
2489 | /** |
2490 | * audio sample format |
2491 | * - encoding: Set by user. |
2492 | * - decoding: Set by libavcodec. |
2493 | */ |
2494 | enum AVSampleFormat sample_fmt; ///< sample format |
2495 | |
2496 | /* The following data should not be initialized. */ |
2497 | /** |
2498 | * Number of samples per channel in an audio frame. |
2499 | * |
2500 | * - encoding: set by libavcodec in avcodec_open2(). Each submitted frame |
2501 | * except the last must contain exactly frame_size samples per channel. |
2502 | * May be 0 when the codec has AV_CODEC_CAP_VARIABLE_FRAME_SIZE set, then the |
2503 | * frame size is not restricted. |
2504 | * - decoding: may be set by some decoders to indicate constant frame size |
2505 | */ |
2506 | int frame_size; |
2507 | |
2508 | /** |
2509 | * Frame counter, set by libavcodec. |
2510 | * |
2511 | * - decoding: total number of frames returned from the decoder so far. |
2512 | * - encoding: total number of frames passed to the encoder so far. |
2513 | * |
2514 | * @note the counter is not incremented if encoding/decoding resulted in |
2515 | * an error. |
2516 | */ |
2517 | int frame_number; |
2518 | |
2519 | /** |
2520 | * number of bytes per packet if constant and known or 0 |
2521 | * Used by some WAV based audio codecs. |
2522 | */ |
2523 | int block_align; |
2524 | |
2525 | /** |
2526 | * Audio cutoff bandwidth (0 means "automatic") |
2527 | * - encoding: Set by user. |
2528 | * - decoding: unused |
2529 | */ |
2530 | int cutoff; |
2531 | |
2532 | /** |
2533 | * Audio channel layout. |
2534 | * - encoding: set by user. |
2535 | * - decoding: set by user, may be overwritten by libavcodec. |
2536 | */ |
2537 | uint64_t channel_layout; |
2538 | |
2539 | /** |
2540 | * Request decoder to use this channel layout if it can (0 for default) |
2541 | * - encoding: unused |
2542 | * - decoding: Set by user. |
2543 | */ |
2544 | uint64_t request_channel_layout; |
2545 | |
2546 | /** |
2547 | * Type of service that the audio stream conveys. |
2548 | * - encoding: Set by user. |
2549 | * - decoding: Set by libavcodec. |
2550 | */ |
2551 | enum AVAudioServiceType audio_service_type; |
2552 | |
2553 | /** |
2554 | * desired sample format |
2555 | * - encoding: Not used. |
2556 | * - decoding: Set by user. |
2557 | * Decoder will decode to this format if it can. |
2558 | */ |
2559 | enum AVSampleFormat request_sample_fmt; |
2560 | |
2561 | /** |
2562 | * This callback is called at the beginning of each frame to get data |
2563 | * buffer(s) for it. There may be one contiguous buffer for all the data or |
2564 | * there may be a buffer per each data plane or anything in between. What |
2565 | * this means is, you may set however many entries in buf[] you feel necessary. |
2566 | * Each buffer must be reference-counted using the AVBuffer API (see description |
2567 | * of buf[] below). |
2568 | * |
2569 | * The following fields will be set in the frame before this callback is |
2570 | * called: |
2571 | * - format |
2572 | * - width, height (video only) |
2573 | * - sample_rate, channel_layout, nb_samples (audio only) |
2574 | * Their values may differ from the corresponding values in |
2575 | * AVCodecContext. This callback must use the frame values, not the codec |
2576 | * context values, to calculate the required buffer size. |
2577 | * |
2578 | * This callback must fill the following fields in the frame: |
2579 | * - data[] |
2580 | * - linesize[] |
2581 | * - extended_data: |
2582 | * * if the data is planar audio with more than 8 channels, then this |
2583 | * callback must allocate and fill extended_data to contain all pointers |
2584 | * to all data planes. data[] must hold as many pointers as it can. |
2585 | * extended_data must be allocated with av_malloc() and will be freed in |
2586 | * av_frame_unref(). |
2587 | * * otherwise extended_data must point to data |
2588 | * - buf[] must contain one or more pointers to AVBufferRef structures. Each of |
2589 | * the frame's data and extended_data pointers must be contained in these. That |
2590 | * is, one AVBufferRef for each allocated chunk of memory, not necessarily one |
2591 | * AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(), |
2592 | * and av_buffer_ref(). |
2593 | * - extended_buf and nb_extended_buf must be allocated with av_malloc() by |
2594 | * this callback and filled with the extra buffers if there are more |
2595 | * buffers than buf[] can hold. extended_buf will be freed in |
2596 | * av_frame_unref(). |
2597 | * |
2598 | * If AV_CODEC_CAP_DR1 is not set then get_buffer2() must call |
2599 | * avcodec_default_get_buffer2() instead of providing buffers allocated by |
2600 | * some other means. |
2601 | * |
2602 | * Each data plane must be aligned to the maximum required by the target |
2603 | * CPU. |
2604 | * |
2605 | * @see avcodec_default_get_buffer2() |
2606 | * |
2607 | * Video: |
2608 | * |
2609 | * If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused |
2610 | * (read and/or written to if it is writable) later by libavcodec. |
2611 | * |
2612 | * avcodec_align_dimensions2() should be used to find the required width and |
2613 | * height, as they normally need to be rounded up to the next multiple of 16. |
2614 | * |
2615 | * Some decoders do not support linesizes changing between frames. |
2616 | * |
2617 | * If frame multithreading is used and thread_safe_callbacks is set, |
2618 | * this callback may be called from a different thread, but not from more |
2619 | * than one at once. Does not need to be reentrant. |
2620 | * |
2621 | * @see avcodec_align_dimensions2() |
2622 | * |
2623 | * Audio: |
2624 | * |
2625 | * Decoders request a buffer of a particular size by setting |
2626 | * AVFrame.nb_samples prior to calling get_buffer2(). The decoder may, |
2627 | * however, utilize only part of the buffer by setting AVFrame.nb_samples |
2628 | * to a smaller value in the output frame. |
2629 | * |
2630 | * As a convenience, av_samples_get_buffer_size() and |
2631 | * av_samples_fill_arrays() in libavutil may be used by custom get_buffer2() |
2632 | * functions to find the required data size and to fill data pointers and |
2633 | * linesize. In AVFrame.linesize, only linesize[0] may be set for audio |
2634 | * since all planes must be the same size. |
2635 | * |
2636 | * @see av_samples_get_buffer_size(), av_samples_fill_arrays() |
2637 | * |
2638 | * - encoding: unused |
2639 | * - decoding: Set by libavcodec, user can override. |
2640 | */ |
2641 | int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags); |
2642 | |
2643 | /** |
2644 | * If non-zero, the decoded audio and video frames returned from |
2645 | * avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted |
2646 | * and are valid indefinitely. The caller must free them with |
2647 | * av_frame_unref() when they are not needed anymore. |
2648 | * Otherwise, the decoded frames must not be freed by the caller and are |
2649 | * only valid until the next decode call. |
2650 | * |
2651 | * This is always automatically enabled if avcodec_receive_frame() is used. |
2652 | * |
2653 | * - encoding: unused |
2654 | * - decoding: set by the caller before avcodec_open2(). |
2655 | */ |
2656 | int refcounted_frames; |
2657 | |
2658 | /* - encoding parameters */ |
2659 | float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0) |
2660 | float qblur; ///< amount of qscale smoothing over time (0.0-1.0) |
2661 | |
2662 | /** |
2663 | * minimum quantizer |
2664 | * - encoding: Set by user. |
2665 | * - decoding: unused |
2666 | */ |
2667 | int qmin; |
2668 | |
2669 | /** |
2670 | * maximum quantizer |
2671 | * - encoding: Set by user. |
2672 | * - decoding: unused |
2673 | */ |
2674 | int qmax; |
2675 | |
2676 | /** |
2677 | * maximum quantizer difference between frames |
2678 | * - encoding: Set by user. |
2679 | * - decoding: unused |
2680 | */ |
2681 | int max_qdiff; |
2682 | |
2683 | #if FF_API_MPV_OPT |
2684 | /** |
2685 | * @deprecated use encoder private options instead |
2686 | */ |
2687 | attribute_deprecated |
2688 | float rc_qsquish; |
2689 | |
2690 | attribute_deprecated |
2691 | float rc_qmod_amp; |
2692 | attribute_deprecated |
2693 | int rc_qmod_freq; |
2694 | #endif |
2695 | |
2696 | /** |
2697 | * decoder bitstream buffer size |
2698 | * - encoding: Set by user. |
2699 | * - decoding: unused |
2700 | */ |
2701 | int rc_buffer_size; |
2702 | |
2703 | /** |
2704 | * ratecontrol override, see RcOverride |
2705 | * - encoding: Allocated/set/freed by user. |
2706 | * - decoding: unused |
2707 | */ |
2708 | int rc_override_count; |
2709 | RcOverride *rc_override; |
2710 | |
2711 | #if FF_API_MPV_OPT |
2712 | /** |
2713 | * @deprecated use encoder private options instead |
2714 | */ |
2715 | attribute_deprecated |
2716 | const char *rc_eq; |
2717 | #endif |
2718 | |
2719 | /** |
2720 | * maximum bitrate |
2721 | * - encoding: Set by user. |
2722 | * - decoding: Set by user, may be overwritten by libavcodec. |
2723 | */ |
2724 | int64_t rc_max_rate; |
2725 | |
2726 | /** |
2727 | * minimum bitrate |
2728 | * - encoding: Set by user. |
2729 | * - decoding: unused |
2730 | */ |
2731 | int64_t rc_min_rate; |
2732 | |
2733 | #if FF_API_MPV_OPT |
2734 | /** |
2735 | * @deprecated use encoder private options instead |
2736 | */ |
2737 | attribute_deprecated |
2738 | float rc_buffer_aggressivity; |
2739 | |
2740 | attribute_deprecated |
2741 | float rc_initial_cplx; |
2742 | #endif |
2743 | |
2744 | /** |
2745 | * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow. |
2746 | * - encoding: Set by user. |
2747 | * - decoding: unused. |
2748 | */ |
2749 | float rc_max_available_vbv_use; |
2750 | |
2751 | /** |
2752 | * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow. |
2753 | * - encoding: Set by user. |
2754 | * - decoding: unused. |
2755 | */ |
2756 | float rc_min_vbv_overflow_use; |
2757 | |
2758 | /** |
2759 | * Number of bits which should be loaded into the rc buffer before decoding starts. |
2760 | * - encoding: Set by user. |
2761 | * - decoding: unused |
2762 | */ |
2763 | int rc_initial_buffer_occupancy; |
2764 | |
2765 | #if FF_API_CODER_TYPE |
2766 | #define FF_CODER_TYPE_VLC 0 |
2767 | #define FF_CODER_TYPE_AC 1 |
2768 | #define FF_CODER_TYPE_RAW 2 |
2769 | #define FF_CODER_TYPE_RLE 3 |
2770 | #if FF_API_UNUSED_MEMBERS |
2771 | #define FF_CODER_TYPE_DEFLATE 4 |
2772 | #endif /* FF_API_UNUSED_MEMBERS */ |
2773 | /** |
2774 | * @deprecated use encoder private options instead |
2775 | */ |
2776 | attribute_deprecated |
2777 | int coder_type; |
2778 | #endif /* FF_API_CODER_TYPE */ |
2779 | |
2780 | #if FF_API_PRIVATE_OPT |
2781 | /** @deprecated use encoder private options instead */ |
2782 | attribute_deprecated |
2783 | int context_model; |
2784 | #endif |
2785 | |
2786 | #if FF_API_MPV_OPT |
2787 | /** |
2788 | * @deprecated use encoder private options instead |
2789 | */ |
2790 | attribute_deprecated |
2791 | int lmin; |
2792 | |
2793 | /** |
2794 | * @deprecated use encoder private options instead |
2795 | */ |
2796 | attribute_deprecated |
2797 | int lmax; |
2798 | #endif |
2799 | |
2800 | #if FF_API_PRIVATE_OPT |
2801 | /** @deprecated use encoder private options instead */ |
2802 | attribute_deprecated |
2803 | int frame_skip_threshold; |
2804 | |
2805 | /** @deprecated use encoder private options instead */ |
2806 | attribute_deprecated |
2807 | int frame_skip_factor; |
2808 | |
2809 | /** @deprecated use encoder private options instead */ |
2810 | attribute_deprecated |
2811 | int frame_skip_exp; |
2812 | |
2813 | /** @deprecated use encoder private options instead */ |
2814 | attribute_deprecated |
2815 | int frame_skip_cmp; |
2816 | #endif /* FF_API_PRIVATE_OPT */ |
2817 | |
2818 | /** |
2819 | * trellis RD quantization |
2820 | * - encoding: Set by user. |
2821 | * - decoding: unused |
2822 | */ |
2823 | int trellis; |
2824 | |
2825 | #if FF_API_PRIVATE_OPT |
2826 | /** @deprecated use encoder private options instead */ |
2827 | attribute_deprecated |
2828 | int min_prediction_order; |
2829 | |
2830 | /** @deprecated use encoder private options instead */ |
2831 | attribute_deprecated |
2832 | int max_prediction_order; |
2833 | |
2834 | /** @deprecated use encoder private options instead */ |
2835 | attribute_deprecated |
2836 | int64_t timecode_frame_start; |
2837 | #endif |
2838 | |
2839 | #if FF_API_RTP_CALLBACK |
2840 | /** |
2841 | * @deprecated unused |
2842 | */ |
2843 | /* The RTP callback: This function is called */ |
2844 | /* every time the encoder has a packet to send. */ |
2845 | /* It depends on the encoder if the data starts */ |
2846 | /* with a Start Code (it should). H.263 does. */ |
2847 | /* mb_nb contains the number of macroblocks */ |
2848 | /* encoded in the RTP payload. */ |
2849 | attribute_deprecated |
2850 | void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb); |
2851 | #endif |
2852 | |
2853 | #if FF_API_PRIVATE_OPT |
2854 | /** @deprecated use encoder private options instead */ |
2855 | attribute_deprecated |
2856 | int rtp_payload_size; /* The size of the RTP payload: the coder will */ |
2857 | /* do its best to deliver a chunk with size */ |
2858 | /* below rtp_payload_size, the chunk will start */ |
2859 | /* with a start code on some codecs like H.263. */ |
2860 | /* This doesn't take account of any particular */ |
2861 | /* headers inside the transmitted RTP payload. */ |
2862 | #endif |
2863 | |
2864 | #if FF_API_STAT_BITS |
2865 | /* statistics, used for 2-pass encoding */ |
2866 | attribute_deprecated |
2867 | int mv_bits; |
2868 | attribute_deprecated |
2869 | int header_bits; |
2870 | attribute_deprecated |
2871 | int i_tex_bits; |
2872 | attribute_deprecated |
2873 | int p_tex_bits; |
2874 | attribute_deprecated |
2875 | int i_count; |
2876 | attribute_deprecated |
2877 | int p_count; |
2878 | attribute_deprecated |
2879 | int skip_count; |
2880 | attribute_deprecated |
2881 | int misc_bits; |
2882 | |
2883 | /** @deprecated this field is unused */ |
2884 | attribute_deprecated |
2885 | int frame_bits; |
2886 | #endif |
2887 | |
2888 | /** |
2889 | * pass1 encoding statistics output buffer |
2890 | * - encoding: Set by libavcodec. |
2891 | * - decoding: unused |
2892 | */ |
2893 | char *stats_out; |
2894 | |
2895 | /** |
2896 | * pass2 encoding statistics input buffer |
2897 | * Concatenated stuff from stats_out of pass1 should be placed here. |
2898 | * - encoding: Allocated/set/freed by user. |
2899 | * - decoding: unused |
2900 | */ |
2901 | char *stats_in; |
2902 | |
2903 | /** |
2904 | * Work around bugs in encoders which sometimes cannot be detected automatically. |
2905 | * - encoding: Set by user |
2906 | * - decoding: Set by user |
2907 | */ |
2908 | int workaround_bugs; |
2909 | #define FF_BUG_AUTODETECT 1 ///< autodetection |
2910 | #if FF_API_OLD_MSMPEG4 |
2911 | #define FF_BUG_OLD_MSMPEG4 2 |
2912 | #endif |
2913 | #define FF_BUG_XVID_ILACE 4 |
2914 | #define FF_BUG_UMP4 8 |
2915 | #define FF_BUG_NO_PADDING 16 |
2916 | #define FF_BUG_AMV 32 |
2917 | #if FF_API_AC_VLC |
2918 | #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default. |
2919 | #endif |
2920 | #define FF_BUG_QPEL_CHROMA 64 |
2921 | #define FF_BUG_STD_QPEL 128 |
2922 | #define FF_BUG_QPEL_CHROMA2 256 |
2923 | #define FF_BUG_DIRECT_BLOCKSIZE 512 |
2924 | #define FF_BUG_EDGE 1024 |
2925 | #define FF_BUG_HPEL_CHROMA 2048 |
2926 | #define FF_BUG_DC_CLIP 4096 |
2927 | #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders. |
2928 | #define FF_BUG_TRUNCATED 16384 |
2929 | #define FF_BUG_IEDGE 32768 |
2930 | |
2931 | /** |
2932 | * strictly follow the standard (MPEG-4, ...). |
2933 | * - encoding: Set by user. |
2934 | * - decoding: Set by user. |
2935 | * Setting this to STRICT or higher means the encoder and decoder will |
2936 | * generally do stupid things, whereas setting it to unofficial or lower |
2937 | * will mean the encoder might produce output that is not supported by all |
2938 | * spec-compliant decoders. Decoders don't differentiate between normal, |
2939 | * unofficial and experimental (that is, they always try to decode things |
2940 | * when they can) unless they are explicitly asked to behave stupidly |
2941 | * (=strictly conform to the specs) |
2942 | */ |
2943 | int strict_std_compliance; |
2944 | #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software. |
2945 | #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences. |
2946 | #define FF_COMPLIANCE_NORMAL 0 |
2947 | #define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions |
2948 | #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things. |
2949 | |
2950 | /** |
2951 | * error concealment flags |
2952 | * - encoding: unused |
2953 | * - decoding: Set by user. |
2954 | */ |
2955 | int error_concealment; |
2956 | #define FF_EC_GUESS_MVS 1 |
2957 | #define FF_EC_DEBLOCK 2 |
2958 | #define FF_EC_FAVOR_INTER 256 |
2959 | |
2960 | /** |
2961 | * debug |
2962 | * - encoding: Set by user. |
2963 | * - decoding: Set by user. |
2964 | */ |
2965 | int debug; |
2966 | #define FF_DEBUG_PICT_INFO 1 |
2967 | #define FF_DEBUG_RC 2 |
2968 | #define FF_DEBUG_BITSTREAM 4 |
2969 | #define FF_DEBUG_MB_TYPE 8 |
2970 | #define FF_DEBUG_QP 16 |
2971 | #if FF_API_DEBUG_MV |
2972 | /** |
2973 | * @deprecated this option does nothing |
2974 | */ |
2975 | #define FF_DEBUG_MV 32 |
2976 | #endif |
2977 | #define FF_DEBUG_DCT_COEFF 0x00000040 |
2978 | #define FF_DEBUG_SKIP 0x00000080 |
2979 | #define FF_DEBUG_STARTCODE 0x00000100 |
2980 | #if FF_API_UNUSED_MEMBERS |
2981 | #define FF_DEBUG_PTS 0x00000200 |
2982 | #endif /* FF_API_UNUSED_MEMBERS */ |
2983 | #define FF_DEBUG_ER 0x00000400 |
2984 | #define FF_DEBUG_MMCO 0x00000800 |
2985 | #define FF_DEBUG_BUGS 0x00001000 |
2986 | #if FF_API_DEBUG_MV |
2987 | #define FF_DEBUG_VIS_QP 0x00002000 |
2988 | #define FF_DEBUG_VIS_MB_TYPE 0x00004000 |
2989 | #endif |
2990 | #define FF_DEBUG_BUFFERS 0x00008000 |
2991 | #define FF_DEBUG_THREADS 0x00010000 |
2992 | #define FF_DEBUG_GREEN_MD 0x00800000 |
2993 | #define FF_DEBUG_NOMC 0x01000000 |
2994 | |
2995 | #if FF_API_DEBUG_MV |
2996 | /** |
2997 | * debug |
2998 | * - encoding: Set by user. |
2999 | * - decoding: Set by user. |
3000 | */ |
3001 | int debug_mv; |
3002 | #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 // visualize forward predicted MVs of P-frames |
3003 | #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 // visualize forward predicted MVs of B-frames |
3004 | #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 // visualize backward predicted MVs of B-frames |
3005 | #endif |
3006 | |
3007 | /** |
3008 | * Error recognition; may misdetect some more or less valid parts as errors. |
3009 | * - encoding: unused |
3010 | * - decoding: Set by user. |
3011 | */ |
3012 | int err_recognition; |
3013 | |
3014 | /** |
3015 | * Verify checksums embedded in the bitstream (could be of either encoded or |
3016 | * decoded data, depending on the codec) and print an error message on mismatch. |
3017 | * If AV_EF_EXPLODE is also set, a mismatching checksum will result in the |
3018 | * decoder returning an error. |
3019 | */ |
3020 | #define AV_EF_CRCCHECK (1<<0) |
3021 | #define AV_EF_BITSTREAM (1<<1) ///< detect bitstream specification deviations |
3022 | #define AV_EF_BUFFER (1<<2) ///< detect improper bitstream length |
3023 | #define AV_EF_EXPLODE (1<<3) ///< abort decoding on minor error detection |
3024 | |
3025 | #define AV_EF_IGNORE_ERR (1<<15) ///< ignore errors and continue |
3026 | #define AV_EF_CAREFUL (1<<16) ///< consider things that violate the spec, are fast to calculate and have not been seen in the wild as errors |
3027 | #define AV_EF_COMPLIANT (1<<17) ///< consider all spec non compliances as errors |
3028 | #define AV_EF_AGGRESSIVE (1<<18) ///< consider things that a sane encoder should not do as an error |
3029 | |
3030 | |
3031 | /** |
3032 | * opaque 64-bit number (generally a PTS) that will be reordered and |
3033 | * output in AVFrame.reordered_opaque |
3034 | * - encoding: unused |
3035 | * - decoding: Set by user. |
3036 | */ |
3037 | int64_t reordered_opaque; |
3038 | |
3039 | /** |
3040 | * Hardware accelerator in use |
3041 | * - encoding: unused. |
3042 | * - decoding: Set by libavcodec |
3043 | */ |
3044 | struct AVHWAccel *hwaccel; |
3045 | |
3046 | /** |
3047 | * Hardware accelerator context. |
3048 | * For some hardware accelerators, a global context needs to be |
3049 | * provided by the user. In that case, this holds display-dependent |
3050 | * data FFmpeg cannot instantiate itself. Please refer to the |
3051 | * FFmpeg HW accelerator documentation to know how to fill this |
3052 | * is. e.g. for VA API, this is a struct vaapi_context. |
3053 | * - encoding: unused |
3054 | * - decoding: Set by user |
3055 | */ |
3056 | void *hwaccel_context; |
3057 | |
3058 | /** |
3059 | * error |
3060 | * - encoding: Set by libavcodec if flags & AV_CODEC_FLAG_PSNR. |
3061 | * - decoding: unused |
3062 | */ |
3063 | uint64_t error[AV_NUM_DATA_POINTERS]; |
3064 | |
3065 | /** |
3066 | * DCT algorithm, see FF_DCT_* below |
3067 | * - encoding: Set by user. |
3068 | * - decoding: unused |
3069 | */ |
3070 | int dct_algo; |
3071 | #define FF_DCT_AUTO 0 |
3072 | #define FF_DCT_FASTINT 1 |
3073 | #define FF_DCT_INT 2 |
3074 | #define FF_DCT_MMX 3 |
3075 | #define FF_DCT_ALTIVEC 5 |
3076 | #define FF_DCT_FAAN 6 |
3077 | |
3078 | /** |
3079 | * IDCT algorithm, see FF_IDCT_* below. |
3080 | * - encoding: Set by user. |
3081 | * - decoding: Set by user. |
3082 | */ |
3083 | int idct_algo; |
3084 | #define FF_IDCT_AUTO 0 |
3085 | #define FF_IDCT_INT 1 |
3086 | #define FF_IDCT_SIMPLE 2 |
3087 | #define FF_IDCT_SIMPLEMMX 3 |
3088 | #define FF_IDCT_ARM 7 |
3089 | #define FF_IDCT_ALTIVEC 8 |
3090 | #if FF_API_ARCH_SH4 |
3091 | #define FF_IDCT_SH4 9 |
3092 | #endif |
3093 | #define FF_IDCT_SIMPLEARM 10 |
3094 | #if FF_API_UNUSED_MEMBERS |
3095 | #define FF_IDCT_IPP 13 |
3096 | #endif /* FF_API_UNUSED_MEMBERS */ |
3097 | #define FF_IDCT_XVID 14 |
3098 | #if FF_API_IDCT_XVIDMMX |
3099 | #define FF_IDCT_XVIDMMX 14 |
3100 | #endif /* FF_API_IDCT_XVIDMMX */ |
3101 | #define FF_IDCT_SIMPLEARMV5TE 16 |
3102 | #define FF_IDCT_SIMPLEARMV6 17 |
3103 | #if FF_API_ARCH_SPARC |
3104 | #define FF_IDCT_SIMPLEVIS 18 |
3105 | #endif |
3106 | #define FF_IDCT_FAAN 20 |
3107 | #define FF_IDCT_SIMPLENEON 22 |
3108 | #if FF_API_ARCH_ALPHA |
3109 | #define FF_IDCT_SIMPLEALPHA 23 |
3110 | #endif |
3111 | #define FF_IDCT_SIMPLEAUTO 128 |
3112 | |
3113 | /** |
3114 | * bits per sample/pixel from the demuxer (needed for huffyuv). |
3115 | * - encoding: Set by libavcodec. |
3116 | * - decoding: Set by user. |
3117 | */ |
3118 | int bits_per_coded_sample; |
3119 | |
3120 | /** |
3121 | * Bits per sample/pixel of internal libavcodec pixel/sample format. |
3122 | * - encoding: set by user. |
3123 | * - decoding: set by libavcodec. |
3124 | */ |
3125 | int bits_per_raw_sample; |
3126 | |
3127 | #if FF_API_LOWRES |
3128 | /** |
3129 | * low resolution decoding, 1-> 1/2 size, 2->1/4 size |
3130 | * - encoding: unused |
3131 | * - decoding: Set by user. |
3132 | */ |
3133 | int lowres; |
3134 | #endif |
3135 | |
3136 | #if FF_API_CODED_FRAME |
3137 | /** |
3138 | * the picture in the bitstream |
3139 | * - encoding: Set by libavcodec. |
3140 | * - decoding: unused |
3141 | * |
3142 | * @deprecated use the quality factor packet side data instead |
3143 | */ |
3144 | attribute_deprecated AVFrame *coded_frame; |
3145 | #endif |
3146 | |
3147 | /** |
3148 | * thread count |
3149 | * is used to decide how many independent tasks should be passed to execute() |
3150 | * - encoding: Set by user. |
3151 | * - decoding: Set by user. |
3152 | */ |
3153 | int thread_count; |
3154 | |
3155 | /** |
3156 | * Which multithreading methods to use. |
3157 | * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread, |
3158 | * so clients which cannot provide future frames should not use it. |
3159 | * |
3160 | * - encoding: Set by user, otherwise the default is used. |
3161 | * - decoding: Set by user, otherwise the default is used. |
3162 | */ |
3163 | int thread_type; |
3164 | #define FF_THREAD_FRAME 1 ///< Decode more than one frame at once |
3165 | #define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once |
3166 | |
3167 | /** |
3168 | * Which multithreading methods are in use by the codec. |
3169 | * - encoding: Set by libavcodec. |
3170 | * - decoding: Set by libavcodec. |
3171 | */ |
3172 | int active_thread_type; |
3173 | |
3174 | /** |
3175 | * Set by the client if its custom get_buffer() callback can be called |
3176 | * synchronously from another thread, which allows faster multithreaded decoding. |
3177 | * draw_horiz_band() will be called from other threads regardless of this setting. |
3178 | * Ignored if the default get_buffer() is used. |
3179 | * - encoding: Set by user. |
3180 | * - decoding: Set by user. |
3181 | */ |
3182 | int thread_safe_callbacks; |
3183 | |
3184 | /** |
3185 | * The codec may call this to execute several independent things. |
3186 | * It will return only after finishing all tasks. |
3187 | * The user may replace this with some multithreaded implementation, |
3188 | * the default implementation will execute the parts serially. |
3189 | * @param count the number of things to execute |
3190 | * - encoding: Set by libavcodec, user can override. |
3191 | * - decoding: Set by libavcodec, user can override. |
3192 | */ |
3193 | int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size); |
3194 | |
3195 | /** |
3196 | * The codec may call this to execute several independent things. |
3197 | * It will return only after finishing all tasks. |
3198 | * The user may replace this with some multithreaded implementation, |
3199 | * the default implementation will execute the parts serially. |
3200 | * Also see avcodec_thread_init and e.g. the --enable-pthread configure option. |
3201 | * @param c context passed also to func |
3202 | * @param count the number of things to execute |
3203 | * @param arg2 argument passed unchanged to func |
3204 | * @param ret return values of executed functions, must have space for "count" values. May be NULL. |
3205 | * @param func function that will be called count times, with jobnr from 0 to count-1. |
3206 | * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no |
3207 | * two instances of func executing at the same time will have the same threadnr. |
3208 | * @return always 0 currently, but code should handle a future improvement where when any call to func |
3209 | * returns < 0 no further calls to func may be done and < 0 is returned. |
3210 | * - encoding: Set by libavcodec, user can override. |
3211 | * - decoding: Set by libavcodec, user can override. |
3212 | */ |
3213 | int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count); |
3214 | |
3215 | /** |
3216 | * noise vs. sse weight for the nsse comparison function |
3217 | * - encoding: Set by user. |
3218 | * - decoding: unused |
3219 | */ |
3220 | int nsse_weight; |
3221 | |
3222 | /** |
3223 | * profile |
3224 | * - encoding: Set by user. |
3225 | * - decoding: Set by libavcodec. |
3226 | */ |
3227 | int profile; |
3228 | #define FF_PROFILE_UNKNOWN -99 |
3229 | #define FF_PROFILE_RESERVED -100 |
3230 | |
3231 | #define FF_PROFILE_AAC_MAIN 0 |
3232 | #define FF_PROFILE_AAC_LOW 1 |
3233 | #define FF_PROFILE_AAC_SSR 2 |
3234 | #define FF_PROFILE_AAC_LTP 3 |
3235 | #define FF_PROFILE_AAC_HE 4 |
3236 | #define FF_PROFILE_AAC_HE_V2 28 |
3237 | #define FF_PROFILE_AAC_LD 22 |
3238 | #define FF_PROFILE_AAC_ELD 38 |
3239 | #define FF_PROFILE_MPEG2_AAC_LOW 128 |
3240 | #define FF_PROFILE_MPEG2_AAC_HE 131 |
3241 | |
3242 | #define FF_PROFILE_DNXHD 0 |
3243 | #define FF_PROFILE_DNXHR_LB 1 |
3244 | #define FF_PROFILE_DNXHR_SQ 2 |
3245 | #define FF_PROFILE_DNXHR_HQ 3 |
3246 | #define FF_PROFILE_DNXHR_HQX 4 |
3247 | #define FF_PROFILE_DNXHR_444 5 |
3248 | |
3249 | #define FF_PROFILE_DTS 20 |
3250 | #define FF_PROFILE_DTS_ES 30 |
3251 | #define FF_PROFILE_DTS_96_24 40 |
3252 | #define FF_PROFILE_DTS_HD_HRA 50 |
3253 | #define FF_PROFILE_DTS_HD_MA 60 |
3254 | #define FF_PROFILE_DTS_EXPRESS 70 |
3255 | |
3256 | #define FF_PROFILE_MPEG2_422 0 |
3257 | #define FF_PROFILE_MPEG2_HIGH 1 |
3258 | #define FF_PROFILE_MPEG2_SS 2 |
3259 | #define FF_PROFILE_MPEG2_SNR_SCALABLE 3 |
3260 | #define FF_PROFILE_MPEG2_MAIN 4 |
3261 | #define FF_PROFILE_MPEG2_SIMPLE 5 |
3262 | |
3263 | #define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag |
3264 | #define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag |
3265 | |
3266 | #define FF_PROFILE_H264_BASELINE 66 |
3267 | #define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED) |
3268 | #define FF_PROFILE_H264_MAIN 77 |
3269 | #define FF_PROFILE_H264_EXTENDED 88 |
3270 | #define FF_PROFILE_H264_HIGH 100 |
3271 | #define FF_PROFILE_H264_HIGH_10 110 |
3272 | #define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA) |
3273 | #define FF_PROFILE_H264_MULTIVIEW_HIGH 118 |
3274 | #define FF_PROFILE_H264_HIGH_422 122 |
3275 | #define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA) |
3276 | #define FF_PROFILE_H264_STEREO_HIGH 128 |
3277 | #define FF_PROFILE_H264_HIGH_444 144 |
3278 | #define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244 |
3279 | #define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA) |
3280 | #define FF_PROFILE_H264_CAVLC_444 44 |
3281 | |
3282 | #define FF_PROFILE_VC1_SIMPLE 0 |
3283 | #define FF_PROFILE_VC1_MAIN 1 |
3284 | #define FF_PROFILE_VC1_COMPLEX 2 |
3285 | #define FF_PROFILE_VC1_ADVANCED 3 |
3286 | |
3287 | #define FF_PROFILE_MPEG4_SIMPLE 0 |
3288 | #define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1 |
3289 | #define FF_PROFILE_MPEG4_CORE 2 |
3290 | #define FF_PROFILE_MPEG4_MAIN 3 |
3291 | #define FF_PROFILE_MPEG4_N_BIT 4 |
3292 | #define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5 |
3293 | #define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6 |
3294 | #define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7 |
3295 | #define FF_PROFILE_MPEG4_HYBRID 8 |
3296 | #define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9 |
3297 | #define FF_PROFILE_MPEG4_CORE_SCALABLE 10 |
3298 | #define FF_PROFILE_MPEG4_ADVANCED_CODING 11 |
3299 | #define FF_PROFILE_MPEG4_ADVANCED_CORE 12 |
3300 | #define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13 |
3301 | #define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14 |
3302 | #define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15 |
3303 | |
3304 | #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 1 |
3305 | #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 2 |
3306 | #define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 32768 |
3307 | #define FF_PROFILE_JPEG2000_DCINEMA_2K 3 |
3308 | #define FF_PROFILE_JPEG2000_DCINEMA_4K 4 |
3309 | |
3310 | #define FF_PROFILE_VP9_0 0 |
3311 | #define FF_PROFILE_VP9_1 1 |
3312 | #define FF_PROFILE_VP9_2 2 |
3313 | #define FF_PROFILE_VP9_3 3 |
3314 | |
3315 | #define FF_PROFILE_HEVC_MAIN 1 |
3316 | #define FF_PROFILE_HEVC_MAIN_10 2 |
3317 | #define FF_PROFILE_HEVC_MAIN_STILL_PICTURE 3 |
3318 | #define FF_PROFILE_HEVC_REXT 4 |
3319 | |
3320 | /** |
3321 | * level |
3322 | * - encoding: Set by user. |
3323 | * - decoding: Set by libavcodec. |
3324 | */ |
3325 | int level; |
3326 | #define FF_LEVEL_UNKNOWN -99 |
3327 | |
3328 | /** |
3329 | * Skip loop filtering for selected frames. |
3330 | * - encoding: unused |
3331 | * - decoding: Set by user. |
3332 | */ |
3333 | enum AVDiscard skip_loop_filter; |
3334 | |
3335 | /** |
3336 | * Skip IDCT/dequantization for selected frames. |
3337 | * - encoding: unused |
3338 | * - decoding: Set by user. |
3339 | */ |
3340 | enum AVDiscard skip_idct; |
3341 | |
3342 | /** |
3343 | * Skip decoding for selected frames. |
3344 | * - encoding: unused |
3345 | * - decoding: Set by user. |
3346 | */ |
3347 | enum AVDiscard skip_frame; |
3348 | |
3349 | /** |
3350 | * Header containing style information for text subtitles. |
3351 | * For SUBTITLE_ASS subtitle type, it should contain the whole ASS |
3352 | * [Script Info] and [V4+ Styles] section, plus the [Events] line and |
3353 | * the Format line following. It shouldn't include any Dialogue line. |
3354 | * - encoding: Set/allocated/freed by user (before avcodec_open2()) |
3355 | * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2()) |
3356 | */ |
3357 | uint8_t *subtitle_header; |
3358 | int subtitle_header_size; |
3359 | |
3360 | #if FF_API_ERROR_RATE |
3361 | /** |
3362 | * @deprecated use the 'error_rate' private AVOption of the mpegvideo |
3363 | * encoders |
3364 | */ |
3365 | attribute_deprecated |
3366 | int error_rate; |
3367 | #endif |
3368 | |
3369 | #if FF_API_VBV_DELAY |
3370 | /** |
3371 | * VBV delay coded in the last frame (in periods of a 27 MHz clock). |
3372 | * Used for compliant TS muxing. |
3373 | * - encoding: Set by libavcodec. |
3374 | * - decoding: unused. |
3375 | * @deprecated this value is now exported as a part of |
3376 | * AV_PKT_DATA_CPB_PROPERTIES packet side data |
3377 | */ |
3378 | attribute_deprecated |
3379 | uint64_t vbv_delay; |
3380 | #endif |
3381 | |
3382 | #if FF_API_SIDEDATA_ONLY_PKT |
3383 | /** |
3384 | * Encoding only and set by default. Allow encoders to output packets |
3385 | * that do not contain any encoded data, only side data. |
3386 | * |
3387 | * Some encoders need to output such packets, e.g. to update some stream |
3388 | * parameters at the end of encoding. |
3389 | * |
3390 | * @deprecated this field disables the default behaviour and |
3391 | * it is kept only for compatibility. |
3392 | */ |
3393 | attribute_deprecated |
3394 | int side_data_only_packets; |
3395 | #endif |
3396 | |
3397 | /** |
3398 | * Audio only. The number of "priming" samples (padding) inserted by the |
3399 | * encoder at the beginning of the audio. I.e. this number of leading |
3400 | * decoded samples must be discarded by the caller to get the original audio |
3401 | * without leading padding. |
3402 | * |
3403 | * - decoding: unused |
3404 | * - encoding: Set by libavcodec. The timestamps on the output packets are |
3405 | * adjusted by the encoder so that they always refer to the |
3406 | * first sample of the data actually contained in the packet, |
3407 | * including any added padding. E.g. if the timebase is |
3408 | * 1/samplerate and the timestamp of the first input sample is |
3409 | * 0, the timestamp of the first output packet will be |
3410 | * -initial_padding. |
3411 | */ |
3412 | int initial_padding; |
3413 | |
3414 | /** |
3415 | * - decoding: For codecs that store a framerate value in the compressed |
3416 | * bitstream, the decoder may export it here. { 0, 1} when |
3417 | * unknown. |
3418 | * - encoding: May be used to signal the framerate of CFR content to an |
3419 | * encoder. |
3420 | */ |
3421 | AVRational framerate; |
3422 | |
3423 | /** |
3424 | * Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx. |
3425 | * - encoding: unused. |
3426 | * - decoding: Set by libavcodec before calling get_format() |
3427 | */ |
3428 | enum AVPixelFormat sw_pix_fmt; |
3429 | |
3430 | /** |
3431 | * Timebase in which pkt_dts/pts and AVPacket.dts/pts are. |
3432 | * - encoding unused. |
3433 | * - decoding set by user. |
3434 | */ |
3435 | AVRational pkt_timebase; |
3436 | |
3437 | /** |
3438 | * AVCodecDescriptor |
3439 | * - encoding: unused. |
3440 | * - decoding: set by libavcodec. |
3441 | */ |
3442 | const AVCodecDescriptor *codec_descriptor; |
3443 | |
3444 | #if !FF_API_LOWRES |
3445 | /** |
3446 | * low resolution decoding, 1-> 1/2 size, 2->1/4 size |
3447 | * - encoding: unused |
3448 | * - decoding: Set by user. |
3449 | */ |
3450 | int lowres; |
3451 | #endif |
3452 | |
3453 | /** |
3454 | * Current statistics for PTS correction. |
3455 | * - decoding: maintained and used by libavcodec, not intended to be used by user apps |
3456 | * - encoding: unused |
3457 | */ |
3458 | int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far |
3459 | int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far |
3460 | int64_t pts_correction_last_pts; /// PTS of the last frame |
3461 | int64_t pts_correction_last_dts; /// DTS of the last frame |
3462 | |
3463 | /** |
3464 | * Character encoding of the input subtitles file. |
3465 | * - decoding: set by user |
3466 | * - encoding: unused |
3467 | */ |
3468 | char *sub_charenc; |
3469 | |
3470 | /** |
3471 | * Subtitles character encoding mode. Formats or codecs might be adjusting |
3472 | * this setting (if they are doing the conversion themselves for instance). |
3473 | * - decoding: set by libavcodec |
3474 | * - encoding: unused |
3475 | */ |
3476 | int sub_charenc_mode; |
3477 | #define FF_SUB_CHARENC_MODE_DO_NOTHING -1 ///< do nothing (demuxer outputs a stream supposed to be already in UTF-8, or the codec is bitmap for instance) |
3478 | #define FF_SUB_CHARENC_MODE_AUTOMATIC 0 ///< libavcodec will select the mode itself |
3479 | #define FF_SUB_CHARENC_MODE_PRE_DECODER 1 ///< the AVPacket data needs to be recoded to UTF-8 before being fed to the decoder, requires iconv |
3480 | |
3481 | /** |
3482 | * Skip processing alpha if supported by codec. |
3483 | * Note that if the format uses pre-multiplied alpha (common with VP6, |
3484 | * and recommended due to better video quality/compression) |
3485 | * the image will look as if alpha-blended onto a black background. |
3486 | * However for formats that do not use pre-multiplied alpha |
3487 | * there might be serious artefacts (though e.g. libswscale currently |
3488 | * assumes pre-multiplied alpha anyway). |
3489 | * |
3490 | * - decoding: set by user |
3491 | * - encoding: unused |
3492 | */ |
3493 | int skip_alpha; |
3494 | |
3495 | /** |
3496 | * Number of samples to skip after a discontinuity |
3497 | * - decoding: unused |
3498 | * - encoding: set by libavcodec |
3499 | */ |
3500 | int seek_preroll; |
3501 | |
3502 | #if !FF_API_DEBUG_MV |
3503 | /** |
3504 | * debug motion vectors |
3505 | * - encoding: Set by user. |
3506 | * - decoding: Set by user. |
3507 | */ |
3508 | int debug_mv; |
3509 | #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames |
3510 | #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames |
3511 | #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames |
3512 | #endif |
3513 | |
3514 | /** |
3515 | * custom intra quantization matrix |
3516 | * - encoding: Set by user, can be NULL. |
3517 | * - decoding: unused. |
3518 | */ |
3519 | uint16_t *chroma_intra_matrix; |
3520 | |
3521 | /** |
3522 | * dump format separator. |
3523 | * can be ", " or "\n " or anything else |
3524 | * - encoding: Set by user. |
3525 | * - decoding: Set by user. |
3526 | */ |
3527 | uint8_t *dump_separator; |
3528 | |
3529 | /** |
3530 | * ',' separated list of allowed decoders. |
3531 | * If NULL then all are allowed |
3532 | * - encoding: unused |
3533 | * - decoding: set by user |
3534 | */ |
3535 | char *codec_whitelist; |
3536 | |
3537 | /* |
3538 | * Properties of the stream that gets decoded |
3539 | * - encoding: unused |
3540 | * - decoding: set by libavcodec |
3541 | */ |
3542 | unsigned properties; |
3543 | #define FF_CODEC_PROPERTY_LOSSLESS 0x00000001 |
3544 | #define FF_CODEC_PROPERTY_CLOSED_CAPTIONS 0x00000002 |
3545 | |
3546 | /** |
3547 | * Additional data associated with the entire coded stream. |
3548 | * |
3549 | * - decoding: unused |
3550 | * - encoding: may be set by libavcodec after avcodec_open2(). |
3551 | */ |
3552 | AVPacketSideData *coded_side_data; |
3553 | int nb_coded_side_data; |
3554 | |
3555 | /** |
3556 | * A reference to the AVHWFramesContext describing the input (for encoding) |
3557 | * or output (decoding) frames. The reference is set by the caller and |
3558 | * afterwards owned (and freed) by libavcodec - it should never be read by |
3559 | * the caller after being set. |
3560 | * |
3561 | * - decoding: This field should be set by the caller from the get_format() |
3562 | * callback. The previous reference (if any) will always be |
3563 | * unreffed by libavcodec before the get_format() call. |
3564 | * |
3565 | * If the default get_buffer2() is used with a hwaccel pixel |
3566 | * format, then this AVHWFramesContext will be used for |
3567 | * allocating the frame buffers. |
3568 | * |
3569 | * - encoding: For hardware encoders configured to use a hwaccel pixel |
3570 | * format, this field should be set by the caller to a reference |
3571 | * to the AVHWFramesContext describing input frames. |
3572 | * AVHWFramesContext.format must be equal to |
3573 | * AVCodecContext.pix_fmt. |
3574 | * |
3575 | * This field should be set before avcodec_open2() is called. |
3576 | */ |
3577 | AVBufferRef *hw_frames_ctx; |
3578 | |
3579 | /** |
3580 | * Control the form of AVSubtitle.rects[N]->ass |
3581 | * - decoding: set by user |
3582 | * - encoding: unused |
3583 | */ |
3584 | int sub_text_format; |
3585 | #define FF_SUB_TEXT_FMT_ASS 0 |
3586 | #if FF_API_ASS_TIMING |
3587 | #define FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS 1 |
3588 | #endif |
3589 | |
3590 | /** |
3591 | * Audio only. The amount of padding (in samples) appended by the encoder to |
3592 | * the end of the audio. I.e. this number of decoded samples must be |
3593 | * discarded by the caller from the end of the stream to get the original |
3594 | * audio without any trailing padding. |
3595 | * |
3596 | * - decoding: unused |
3597 | * - encoding: unused |
3598 | */ |
3599 | int trailing_padding; |
3600 | |
3601 | /** |
3602 | * The number of pixels per image to maximally accept. |
3603 | * |
3604 | * - decoding: set by user |
3605 | * - encoding: set by user |
3606 | */ |
3607 | int64_t max_pixels; |
3608 | |
3609 | /** |
3610 | * A reference to the AVHWDeviceContext describing the device which will |
3611 | * be used by a hardware encoder/decoder. The reference is set by the |
3612 | * caller and afterwards owned (and freed) by libavcodec. |
3613 | * |
3614 | * This should be used if either the codec device does not require |
3615 | * hardware frames or any that are used are to be allocated internally by |
3616 | * libavcodec. If the user wishes to supply any of the frames used as |
3617 | * encoder input or decoder output then hw_frames_ctx should be used |
3618 | * instead. When hw_frames_ctx is set in get_format() for a decoder, this |
3619 | * field will be ignored while decoding the associated stream segment, but |
3620 | * may again be used on a following one after another get_format() call. |
3621 | * |
3622 | * For both encoders and decoders this field should be set before |
3623 | * avcodec_open2() is called and must not be written to thereafter. |
3624 | * |
3625 | * Note that some decoders may require this field to be set initially in |
3626 | * order to support hw_frames_ctx at all - in that case, all frames |
3627 | * contexts used must be created on the same device. |
3628 | */ |
3629 | AVBufferRef *hw_device_ctx; |
3630 | |
3631 | /** |
3632 | * Bit set of AV_HWACCEL_FLAG_* flags, which affect hardware accelerated |
3633 | * decoding (if active). |
3634 | * - encoding: unused |
3635 | * - decoding: Set by user (either before avcodec_open2(), or in the |
3636 | * AVCodecContext.get_format callback) |
3637 | */ |
3638 | int hwaccel_flags; |
3639 | int has_dolby_vision_meta; |
3640 | } AVCodecContext; |
3641 | |
3642 | AVRational av_codec_get_pkt_timebase (const AVCodecContext *avctx); |
3643 | void av_codec_set_pkt_timebase (AVCodecContext *avctx, AVRational val); |
3644 | |
3645 | const AVCodecDescriptor *av_codec_get_codec_descriptor(const AVCodecContext *avctx); |
3646 | void av_codec_set_codec_descriptor(AVCodecContext *avctx, const AVCodecDescriptor *desc); |
3647 | |
3648 | unsigned av_codec_get_codec_properties(const AVCodecContext *avctx); |
3649 | |
3650 | int av_codec_get_lowres(const AVCodecContext *avctx); |
3651 | void av_codec_set_lowres(AVCodecContext *avctx, int val); |
3652 | |
3653 | int av_codec_get_seek_preroll(const AVCodecContext *avctx); |
3654 | void av_codec_set_seek_preroll(AVCodecContext *avctx, int val); |
3655 | |
3656 | uint16_t *av_codec_get_chroma_intra_matrix(const AVCodecContext *avctx); |
3657 | void av_codec_set_chroma_intra_matrix(AVCodecContext *avctx, uint16_t *val); |
3658 | |
3659 | /** |
3660 | * AVProfile. |
3661 | */ |
3662 | typedef struct AVProfile { |
3663 | int profile; |
3664 | const char *name; ///< short name for the profile |
3665 | } AVProfile; |
3666 | |
3667 | typedef struct AVCodecDefault AVCodecDefault; |
3668 | |
3669 | struct AVSubtitle; |
3670 | |
3671 | /** |
3672 | * AVCodec. |
3673 | */ |
3674 | typedef struct AVCodec { |
3675 | /** |
3676 | * Name of the codec implementation. |
3677 | * The name is globally unique among encoders and among decoders (but an |
3678 | * encoder and a decoder can share the same name). |
3679 | * This is the primary way to find a codec from the user perspective. |
3680 | */ |
3681 | const char *name; |
3682 | /** |
3683 | * Descriptive name for the codec, meant to be more human readable than name. |
3684 | * You should use the NULL_IF_CONFIG_SMALL() macro to define it. |
3685 | */ |
3686 | const char *long_name; |
3687 | enum AVMediaType type; |
3688 | enum AVCodecID id; |
3689 | /** |
3690 | * Codec capabilities. |
3691 | * see AV_CODEC_CAP_* |
3692 | */ |
3693 | int capabilities; |
3694 | const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0} |
3695 | const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1 |
3696 | const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0 |
3697 | const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1 |
3698 | const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0 |
3699 | uint8_t max_lowres; ///< maximum value for lowres supported by the decoder |
3700 | const AVClass *priv_class; ///< AVClass for the private context |
3701 | const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN} |
3702 | |
3703 | /***************************************************************** |
3704 | * No fields below this line are part of the public API. They |
3705 | * may not be used outside of libavcodec and can be changed and |
3706 | * removed at will. |
3707 | * New public fields should be added right above. |
3708 | ***************************************************************** |
3709 | */ |
3710 | int priv_data_size; |
3711 | struct AVCodec *next; |
3712 | /** |
3713 | * @name Frame-level threading support functions |
3714 | * @{ |
3715 | */ |
3716 | /** |
3717 | * If defined, called on thread contexts when they are created. |
3718 | * If the codec allocates writable tables in init(), re-allocate them here. |
3719 | * priv_data will be set to a copy of the original. |
3720 | */ |
3721 | int (*init_thread_copy)(AVCodecContext *); |
3722 | /** |
3723 | * Copy necessary context variables from a previous thread context to the current one. |
3724 | * If not defined, the next thread will start automatically; otherwise, the codec |
3725 | * must call ff_thread_finish_setup(). |
3726 | * |
3727 | * dst and src will (rarely) point to the same context, in which case memcpy should be skipped. |
3728 | */ |
3729 | int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src); |
3730 | /** @} */ |
3731 | |
3732 | /** |
3733 | * Private codec-specific defaults. |
3734 | */ |
3735 | const AVCodecDefault *defaults; |
3736 | |
3737 | /** |
3738 | * Initialize codec static data, called from avcodec_register(). |
3739 | */ |
3740 | void (*init_static_data)(struct AVCodec *codec); |
3741 | |
3742 | int (*init)(AVCodecContext *); |
3743 | int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size, |
3744 | const struct AVSubtitle *sub); |
3745 | /** |
3746 | * Encode data to an AVPacket. |
3747 | * |
3748 | * @param avctx codec context |
3749 | * @param avpkt output AVPacket (may contain a user-provided buffer) |
3750 | * @param[in] frame AVFrame containing the raw data to be encoded |
3751 | * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a |
3752 | * non-empty packet was returned in avpkt. |
3753 | * @return 0 on success, negative error code on failure |
3754 | */ |
3755 | int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, |
3756 | int *got_packet_ptr); |
3757 | int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt); |
3758 | int (*close)(AVCodecContext *); |
3759 | /** |
3760 | * Decode/encode API with decoupled packet/frame dataflow. The API is the |
3761 | * same as the avcodec_ prefixed APIs (avcodec_send_frame() etc.), except |
3762 | * that: |
3763 | * - never called if the codec is closed or the wrong type, |
3764 | * - AVPacket parameter change side data is applied right before calling |
3765 | * AVCodec->send_packet, |
3766 | * - if AV_CODEC_CAP_DELAY is not set, drain packets or frames are never sent, |
3767 | * - only one drain packet is ever passed down (until the next flush()), |
3768 | * - a drain AVPacket is always NULL (no need to check for avpkt->size). |
3769 | */ |
3770 | int (*send_frame)(AVCodecContext *avctx, const AVFrame *frame); |
3771 | int (*send_packet)(AVCodecContext *avctx, const AVPacket *avpkt); |
3772 | int (*receive_frame)(AVCodecContext *avctx, AVFrame *frame); |
3773 | int (*receive_packet)(AVCodecContext *avctx, AVPacket *avpkt); |
3774 | /** |
3775 | * Flush buffers. |
3776 | * Will be called when seeking |
3777 | */ |
3778 | void (*flush)(AVCodecContext *); |
3779 | /** |
3780 | * Internal codec capabilities. |
3781 | * See FF_CODEC_CAP_* in internal.h |
3782 | */ |
3783 | int caps_internal; |
3784 | } AVCodec; |
3785 | |
3786 | int av_codec_get_max_lowres(const AVCodec *codec); |
3787 | |
3788 | struct MpegEncContext; |
3789 | |
3790 | /** |
3791 | * @defgroup lavc_hwaccel AVHWAccel |
3792 | * @{ |
3793 | */ |
3794 | typedef struct AVHWAccel { |
3795 | /** |
3796 | * Name of the hardware accelerated codec. |
3797 | * The name is globally unique among encoders and among decoders (but an |
3798 | * encoder and a decoder can share the same name). |
3799 | */ |
3800 | const char *name; |
3801 | |
3802 | /** |
3803 | * Type of codec implemented by the hardware accelerator. |
3804 | * |
3805 | * See AVMEDIA_TYPE_xxx |
3806 | */ |
3807 | enum AVMediaType type; |
3808 | |
3809 | /** |
3810 | * Codec implemented by the hardware accelerator. |
3811 | * |
3812 | * See AV_CODEC_ID_xxx |
3813 | */ |
3814 | enum AVCodecID id; |
3815 | |
3816 | /** |
3817 | * Supported pixel format. |
3818 | * |
3819 | * Only hardware accelerated formats are supported here. |
3820 | */ |
3821 | enum AVPixelFormat pix_fmt; |
3822 | |
3823 | /** |
3824 | * Hardware accelerated codec capabilities. |
3825 | * see HWACCEL_CODEC_CAP_* |
3826 | */ |
3827 | int capabilities; |
3828 | |
3829 | /***************************************************************** |
3830 | * No fields below this line are part of the public API. They |
3831 | * may not be used outside of libavcodec and can be changed and |
3832 | * removed at will. |
3833 | * New public fields should be added right above. |
3834 | ***************************************************************** |
3835 | */ |
3836 | struct AVHWAccel *next; |
3837 | |
3838 | /** |
3839 | * Allocate a custom buffer |
3840 | */ |
3841 | int (*alloc_frame)(AVCodecContext *avctx, AVFrame *frame); |
3842 | |
3843 | /** |
3844 | * Called at the beginning of each frame or field picture. |
3845 | * |
3846 | * Meaningful frame information (codec specific) is guaranteed to |
3847 | * be parsed at this point. This function is mandatory. |
3848 | * |
3849 | * Note that buf can be NULL along with buf_size set to 0. |
3850 | * Otherwise, this means the whole frame is available at this point. |
3851 | * |
3852 | * @param avctx the codec context |
3853 | * @param buf the frame data buffer base |
3854 | * @param buf_size the size of the frame in bytes |
3855 | * @return zero if successful, a negative value otherwise |
3856 | */ |
3857 | int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); |
3858 | |
3859 | /** |
3860 | * Callback for each slice. |
3861 | * |
3862 | * Meaningful slice information (codec specific) is guaranteed to |
3863 | * be parsed at this point. This function is mandatory. |
3864 | * The only exception is XvMC, that works on MB level. |
3865 | * |
3866 | * @param avctx the codec context |
3867 | * @param buf the slice data buffer base |
3868 | * @param buf_size the size of the slice in bytes |
3869 | * @return zero if successful, a negative value otherwise |
3870 | */ |
3871 | int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); |
3872 | |
3873 | /** |
3874 | * Called at the end of each frame or field picture. |
3875 | * |
3876 | * The whole picture is parsed at this point and can now be sent |
3877 | * to the hardware accelerator. This function is mandatory. |
3878 | * |
3879 | * @param avctx the codec context |
3880 | * @return zero if successful, a negative value otherwise |
3881 | */ |
3882 | int (*end_frame)(AVCodecContext *avctx); |
3883 | |
3884 | /** |
3885 | * Size of per-frame hardware accelerator private data. |
3886 | * |
3887 | * Private data is allocated with av_mallocz() before |
3888 | * AVCodecContext.get_buffer() and deallocated after |
3889 | * AVCodecContext.release_buffer(). |
3890 | */ |
3891 | int frame_priv_data_size; |
3892 | |
3893 | /** |
3894 | * Called for every Macroblock in a slice. |
3895 | * |
3896 | * XvMC uses it to replace the ff_mpv_decode_mb(). |
3897 | * Instead of decoding to raw picture, MB parameters are |
3898 | * stored in an array provided by the video driver. |
3899 | * |
3900 | * @param s the mpeg context |
3901 | */ |
3902 | void (*decode_mb)(struct MpegEncContext *s); |
3903 | |
3904 | /** |
3905 | * Initialize the hwaccel private data. |
3906 | * |
3907 | * This will be called from ff_get_format(), after hwaccel and |
3908 | * hwaccel_context are set and the hwaccel private data in AVCodecInternal |
3909 | * is allocated. |
3910 | */ |
3911 | int (*init)(AVCodecContext *avctx); |
3912 | |
3913 | /** |
3914 | * Uninitialize the hwaccel private data. |
3915 | * |
3916 | * This will be called from get_format() or avcodec_close(), after hwaccel |
3917 | * and hwaccel_context are already uninitialized. |
3918 | */ |
3919 | int (*uninit)(AVCodecContext *avctx); |
3920 | |
3921 | /** |
3922 | * Size of the private data to allocate in |
3923 | * AVCodecInternal.hwaccel_priv_data. |
3924 | */ |
3925 | int priv_data_size; |
3926 | |
3927 | /** |
3928 | * Internal hwaccel capabilities. |
3929 | */ |
3930 | int caps_internal; |
3931 | } AVHWAccel; |
3932 | |
3933 | /** |
3934 | * Hardware acceleration should be used for decoding even if the codec level |
3935 | * used is unknown or higher than the maximum supported level reported by the |
3936 | * hardware driver. |
3937 | * |
3938 | * It's generally a good idea to pass this flag unless you have a specific |
3939 | * reason not to, as hardware tends to under-report supported levels. |
3940 | */ |
3941 | #define AV_HWACCEL_FLAG_IGNORE_LEVEL (1 << 0) |
3942 | |
3943 | /** |
3944 | * Hardware acceleration can output YUV pixel formats with a different chroma |
3945 | * sampling than 4:2:0 and/or other than 8 bits per component. |
3946 | */ |
3947 | #define AV_HWACCEL_FLAG_ALLOW_HIGH_DEPTH (1 << 1) |
3948 | |
3949 | /** |
3950 | * @} |
3951 | */ |
3952 | |
3953 | #if FF_API_AVPICTURE |
3954 | /** |
3955 | * @defgroup lavc_picture AVPicture |
3956 | * |
3957 | * Functions for working with AVPicture |
3958 | * @{ |
3959 | */ |
3960 | |
3961 | /** |
3962 | * Picture data structure. |
3963 | * |
3964 | * Up to four components can be stored into it, the last component is |
3965 | * alpha. |
3966 | * @deprecated use AVFrame or imgutils functions instead |
3967 | */ |
3968 | typedef struct AVPicture { |
3969 | attribute_deprecated |
3970 | uint8_t *data[AV_NUM_DATA_POINTERS]; ///< pointers to the image data planes |
3971 | attribute_deprecated |
3972 | int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line |
3973 | } AVPicture; |
3974 | |
3975 | /** |
3976 | * @} |
3977 | */ |
3978 | #endif |
3979 | |
3980 | enum AVSubtitleType { |
3981 | SUBTITLE_NONE, |
3982 | |
3983 | SUBTITLE_BITMAP, ///< A bitmap, pict will be set |
3984 | |
3985 | /** |
3986 | * Plain text, the text field must be set by the decoder and is |
3987 | * authoritative. ass and pict fields may contain approximations. |
3988 | */ |
3989 | SUBTITLE_TEXT, |
3990 | |
3991 | /** |
3992 | * Formatted text, the ass field must be set by the decoder and is |
3993 | * authoritative. pict and text fields may contain approximations. |
3994 | */ |
3995 | SUBTITLE_ASS, |
3996 | }; |
3997 | |
3998 | #define AV_SUBTITLE_FLAG_FORCED 0x00000001 |
3999 | |
4000 | typedef struct AVSubtitleRect { |
4001 | int x; ///< top left corner of pict, undefined when pict is not set |
4002 | int y; ///< top left corner of pict, undefined when pict is not set |
4003 | int w; ///< width of pict, undefined when pict is not set |
4004 | int h; ///< height of pict, undefined when pict is not set |
4005 | int nb_colors; ///< number of colors in pict, undefined when pict is not set |
4006 | |
4007 | #if FF_API_AVPICTURE |
4008 | /** |
4009 | * @deprecated unused |
4010 | */ |
4011 | attribute_deprecated |
4012 | AVPicture pict; |
4013 | #endif |
4014 | /** |
4015 | * data+linesize for the bitmap of this subtitle. |
4016 | * Can be set for text/ass as well once they are rendered. |
4017 | */ |
4018 | uint8_t *data[4]; |
4019 | int linesize[4]; |
4020 | |
4021 | enum AVSubtitleType type; |
4022 | |
4023 | char *text; ///< 0 terminated plain UTF-8 text |
4024 | |
4025 | /** |
4026 | * 0 terminated ASS/SSA compatible event line. |
4027 | * The presentation of this is unaffected by the other values in this |
4028 | * struct. |
4029 | */ |
4030 | char *ass; |
4031 | |
4032 | int flags; |
4033 | } AVSubtitleRect; |
4034 | |
4035 | typedef struct AVSubtitle { |
4036 | uint16_t format; /* 0 = graphics */ |
4037 | uint32_t start_display_time; /* relative to packet pts, in ms */ |
4038 | uint32_t end_display_time; /* relative to packet pts, in ms */ |
4039 | unsigned num_rects; |
4040 | AVSubtitleRect **rects; |
4041 | int64_t pts; ///< Same as packet pts, in AV_TIME_BASE |
4042 | } AVSubtitle; |
4043 | |
4044 | /** |
4045 | * This struct describes the properties of an encoded stream. |
4046 | * |
4047 | * sizeof(AVCodecParameters) is not a part of the public ABI, this struct must |
4048 | * be allocated with avcodec_parameters_alloc() and freed with |
4049 | * avcodec_parameters_free(). |
4050 | */ |
4051 | typedef struct AVCodecParameters { |
4052 | /** |
4053 | * General type of the encoded data. |
4054 | */ |
4055 | enum AVMediaType codec_type; |
4056 | /** |
4057 | * Specific type of the encoded data (the codec used). |
4058 | */ |
4059 | enum AVCodecID codec_id; |
4060 | /** |
4061 | * Additional information about the codec (corresponds to the AVI FOURCC). |
4062 | */ |
4063 | uint32_t codec_tag; |
4064 | |
4065 | /** |
4066 | * Extra binary data needed for initializing the decoder, codec-dependent. |
4067 | * |
4068 | * Must be allocated with av_malloc() and will be freed by |
4069 | * avcodec_parameters_free(). The allocated size of extradata must be at |
4070 | * least extradata_size + AV_INPUT_BUFFER_PADDING_SIZE, with the padding |
4071 | * bytes zeroed. |
4072 | */ |
4073 | uint8_t *extradata; |
4074 | /** |
4075 | * Size of the extradata content in bytes. |
4076 | */ |
4077 | int extradata_size; |
4078 | |
4079 | /** |
4080 | * - video: the pixel format, the value corresponds to enum AVPixelFormat. |
4081 | * - audio: the sample format, the value corresponds to enum AVSampleFormat. |
4082 | */ |
4083 | int format; |
4084 | |
4085 | /** |
4086 | * The average bitrate of the encoded data (in bits per second). |
4087 | */ |
4088 | int64_t bit_rate; |
4089 | |
4090 | /** |
4091 | * The number of bits per sample in the codedwords. |
4092 | * |
4093 | * This is basically the bitrate per sample. It is mandatory for a bunch of |
4094 | * formats to actually decode them. It's the number of bits for one sample in |
4095 | * the actual coded bitstream. |
4096 | * |
4097 | * This could be for example 4 for ADPCM |
4098 | * For PCM formats this matches bits_per_raw_sample |
4099 | * Can be 0 |
4100 | */ |
4101 | int bits_per_coded_sample; |
4102 | |
4103 | /** |
4104 | * This is the number of valid bits in each output sample. If the |
4105 | * sample format has more bits, the least significant bits are additional |
4106 | * padding bits, which are always 0. Use right shifts to reduce the sample |
4107 | * to its actual size. For example, audio formats with 24 bit samples will |
4108 | * have bits_per_raw_sample set to 24, and format set to AV_SAMPLE_FMT_S32. |
4109 | * To get the original sample use "(int32_t)sample >> 8"." |
4110 | * |
4111 | * For ADPCM this might be 12 or 16 or similar |
4112 | * Can be 0 |
4113 | */ |
4114 | int bits_per_raw_sample; |
4115 | |
4116 | /** |
4117 | * Codec-specific bitstream restrictions that the stream conforms to. |
4118 | */ |
4119 | int profile; |
4120 | int level; |
4121 | |
4122 | /** |
4123 | * Video only. The dimensions of the video frame in pixels. |
4124 | */ |
4125 | int width; |
4126 | int height; |
4127 | |
4128 | /** |
4129 | * Video only. The aspect ratio (width / height) which a single pixel |
4130 | * should have when displayed. |
4131 | * |
4132 | * When the aspect ratio is unknown / undefined, the numerator should be |
4133 | * set to 0 (the denominator may have any value). |
4134 | */ |
4135 | AVRational sample_aspect_ratio; |
4136 | |
4137 | /** |
4138 | * Video only. The order of the fields in interlaced video. |
4139 | */ |
4140 | enum AVFieldOrder field_order; |
4141 | |
4142 | /** |
4143 | * Video only. Additional colorspace characteristics. |
4144 | */ |
4145 | enum AVColorRange color_range; |
4146 | enum AVColorPrimaries color_primaries; |
4147 | enum AVColorTransferCharacteristic color_trc; |
4148 | enum AVColorSpace color_space; |
4149 | enum AVChromaLocation chroma_location; |
4150 | |
4151 | /** |
4152 | * Video only. Number of delayed frames. |
4153 | */ |
4154 | int video_delay; |
4155 | |
4156 | /** |
4157 | * Audio only. The channel layout bitmask. May be 0 if the channel layout is |
4158 | * unknown or unspecified, otherwise the number of bits set must be equal to |
4159 | * the channels field. |
4160 | */ |
4161 | uint64_t channel_layout; |
4162 | /** |
4163 | * Audio only. The number of audio channels. |
4164 | */ |
4165 | int channels; |
4166 | /** |
4167 | * Audio only. The number of audio samples per second. |
4168 | */ |
4169 | int sample_rate; |
4170 | /** |
4171 | * Audio only. The number of bytes per coded audio frame, required by some |
4172 | * formats. |
4173 | * |
4174 | * Corresponds to nBlockAlign in WAVEFORMATEX. |
4175 | */ |
4176 | int block_align; |
4177 | /** |
4178 | * Audio only. Audio frame size, if known. Required by some formats to be static. |
4179 | */ |
4180 | int frame_size; |
4181 | |
4182 | /** |
4183 | * Audio only. The amount of padding (in samples) inserted by the encoder at |
4184 | * the beginning of the audio. I.e. this number of leading decoded samples |
4185 | * must be discarded by the caller to get the original audio without leading |
4186 | * padding. |
4187 | */ |
4188 | int initial_padding; |
4189 | /** |
4190 | * Audio only. The amount of padding (in samples) appended by the encoder to |
4191 | * the end of the audio. I.e. this number of decoded samples must be |
4192 | * discarded by the caller from the end of the stream to get the original |
4193 | * audio without any trailing padding. |
4194 | */ |
4195 | int trailing_padding; |
4196 | /** |
4197 | * Audio only. Number of samples to skip after a discontinuity. |
4198 | */ |
4199 | int seek_preroll; |
4200 | } AVCodecParameters; |
4201 | |
4202 | /** |
4203 | * If c is NULL, returns the first registered codec, |
4204 | * if c is non-NULL, returns the next registered codec after c, |
4205 | * or NULL if c is the last one. |
4206 | */ |
4207 | AVCodec *av_codec_next(const AVCodec *c); |
4208 | |
4209 | /** |
4210 | * Return the LIBAVCODEC_VERSION_INT constant. |
4211 | */ |
4212 | unsigned avcodec_version(void); |
4213 | |
4214 | /** |
4215 | * Return the libavcodec build-time configuration. |
4216 | */ |
4217 | const char *avcodec_configuration(void); |
4218 | |
4219 | /** |
4220 | * Return the libavcodec license. |
4221 | */ |
4222 | const char *avcodec_license(void); |
4223 | |
4224 | /** |
4225 | * Register the codec codec and initialize libavcodec. |
4226 | * |
4227 | * @warning either this function or avcodec_register_all() must be called |
4228 | * before any other libavcodec functions. |
4229 | * |
4230 | * @see avcodec_register_all() |
4231 | */ |
4232 | void avcodec_register(AVCodec *codec); |
4233 | |
4234 | /** |
4235 | * Register all the codecs, parsers and bitstream filters which were enabled at |
4236 | * configuration time. If you do not call this function you can select exactly |
4237 | * which formats you want to support, by using the individual registration |
4238 | * functions. |
4239 | * |
4240 | * @see avcodec_register |
4241 | * @see av_register_codec_parser |
4242 | * @see av_register_bitstream_filter |
4243 | */ |
4244 | void avcodec_register_all(void); |
4245 | |
4246 | /** |
4247 | * Allocate an AVCodecContext and set its fields to default values. The |
4248 | * resulting struct should be freed with avcodec_free_context(). |
4249 | * |
4250 | * @param codec if non-NULL, allocate private data and initialize defaults |
4251 | * for the given codec. It is illegal to then call avcodec_open2() |
4252 | * with a different codec. |
4253 | * If NULL, then the codec-specific defaults won't be initialized, |
4254 | * which may result in suboptimal default settings (this is |
4255 | * important mainly for encoders, e.g. libx264). |
4256 | * |
4257 | * @return An AVCodecContext filled with default values or NULL on failure. |
4258 | */ |
4259 | AVCodecContext *avcodec_alloc_context3(const AVCodec *codec); |
4260 | |
4261 | /** |
4262 | * Free the codec context and everything associated with it and write NULL to |
4263 | * the provided pointer. |
4264 | */ |
4265 | void avcodec_free_context(AVCodecContext **avctx); |
4266 | |
4267 | #if FF_API_GET_CONTEXT_DEFAULTS |
4268 | /** |
4269 | * @deprecated This function should not be used, as closing and opening a codec |
4270 | * context multiple time is not supported. A new codec context should be |
4271 | * allocated for each new use. |
4272 | */ |
4273 | int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec); |
4274 | #endif |
4275 | |
4276 | /** |
4277 | * Get the AVClass for AVCodecContext. It can be used in combination with |
4278 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. |
4279 | * |
4280 | * @see av_opt_find(). |
4281 | */ |
4282 | const AVClass *avcodec_get_class(void); |
4283 | |
4284 | #if FF_API_COPY_CONTEXT |
4285 | /** |
4286 | * Get the AVClass for AVFrame. It can be used in combination with |
4287 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. |
4288 | * |
4289 | * @see av_opt_find(). |
4290 | */ |
4291 | const AVClass *avcodec_get_frame_class(void); |
4292 | |
4293 | /** |
4294 | * Get the AVClass for AVSubtitleRect. It can be used in combination with |
4295 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. |
4296 | * |
4297 | * @see av_opt_find(). |
4298 | */ |
4299 | const AVClass *avcodec_get_subtitle_rect_class(void); |
4300 | |
4301 | /** |
4302 | * Copy the settings of the source AVCodecContext into the destination |
4303 | * AVCodecContext. The resulting destination codec context will be |
4304 | * unopened, i.e. you are required to call avcodec_open2() before you |
4305 | * can use this AVCodecContext to decode/encode video/audio data. |
4306 | * |
4307 | * @param dest target codec context, should be initialized with |
4308 | * avcodec_alloc_context3(NULL), but otherwise uninitialized |
4309 | * @param src source codec context |
4310 | * @return AVERROR() on error (e.g. memory allocation error), 0 on success |
4311 | * |
4312 | * @deprecated The semantics of this function are ill-defined and it should not |
4313 | * be used. If you need to transfer the stream parameters from one codec context |
4314 | * to another, use an intermediate AVCodecParameters instance and the |
4315 | * avcodec_parameters_from_context() / avcodec_parameters_to_context() |
4316 | * functions. |
4317 | */ |
4318 | attribute_deprecated |
4319 | int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src); |
4320 | #endif |
4321 | |
4322 | /** |
4323 | * Allocate a new AVCodecParameters and set its fields to default values |
4324 | * (unknown/invalid/0). The returned struct must be freed with |
4325 | * avcodec_parameters_free(). |
4326 | */ |
4327 | AVCodecParameters *avcodec_parameters_alloc(void); |
4328 | |
4329 | /** |
4330 | * Free an AVCodecParameters instance and everything associated with it and |
4331 | * write NULL to the supplied pointer. |
4332 | */ |
4333 | void avcodec_parameters_free(AVCodecParameters **par); |
4334 | |
4335 | /** |
4336 | * Copy the contents of src to dst. Any allocated fields in dst are freed and |
4337 | * replaced with newly allocated duplicates of the corresponding fields in src. |
4338 | * |
4339 | * @return >= 0 on success, a negative AVERROR code on failure. |
4340 | */ |
4341 | int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src); |
4342 | |
4343 | /** |
4344 | * Fill the parameters struct based on the values from the supplied codec |
4345 | * context. Any allocated fields in par are freed and replaced with duplicates |
4346 | * of the corresponding fields in codec. |
4347 | * |
4348 | * @return >= 0 on success, a negative AVERROR code on failure |
4349 | */ |
4350 | int avcodec_parameters_from_context(AVCodecParameters *par, |
4351 | const AVCodecContext *codec); |
4352 | |
4353 | /** |
4354 | * Fill the codec context based on the values from the supplied codec |
4355 | * parameters. Any allocated fields in codec that have a corresponding field in |
4356 | * par are freed and replaced with duplicates of the corresponding field in par. |
4357 | * Fields in codec that do not have a counterpart in par are not touched. |
4358 | * |
4359 | * @return >= 0 on success, a negative AVERROR code on failure. |
4360 | */ |
4361 | int avcodec_parameters_to_context(AVCodecContext *codec, |
4362 | const AVCodecParameters *par); |
4363 | |
4364 | /** |
4365 | * Initialize the AVCodecContext to use the given AVCodec. Prior to using this |
4366 | * function the context has to be allocated with avcodec_alloc_context3(). |
4367 | * |
4368 | * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(), |
4369 | * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for |
4370 | * retrieving a codec. |
4371 | * |
4372 | * @warning This function is not thread safe! |
4373 | * |
4374 | * @note Always call this function before using decoding routines (such as |
4375 | * @ref avcodec_receive_frame()). |
4376 | * |
4377 | * @code |
4378 | * avcodec_register_all(); |
4379 | * av_dict_set(&opts, "b", "2.5M", 0); |
4380 | * codec = avcodec_find_decoder(AV_CODEC_ID_H264); |
4381 | * if (!codec) |
4382 | * exit(1); |
4383 | * |
4384 | * context = avcodec_alloc_context3(codec); |
4385 | * |
4386 | * if (avcodec_open2(context, codec, opts) < 0) |
4387 | * exit(1); |
4388 | * @endcode |
4389 | * |
4390 | * @param avctx The context to initialize. |
4391 | * @param codec The codec to open this context for. If a non-NULL codec has been |
4392 | * previously passed to avcodec_alloc_context3() or |
4393 | * for this context, then this parameter MUST be either NULL or |
4394 | * equal to the previously passed codec. |
4395 | * @param options A dictionary filled with AVCodecContext and codec-private options. |
4396 | * On return this object will be filled with options that were not found. |
4397 | * |
4398 | * @return zero on success, a negative value on error |
4399 | * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(), |
4400 | * av_dict_set(), av_opt_find(). |
4401 | */ |
4402 | int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options); |
4403 | |
4404 | /** |
4405 | * Close a given AVCodecContext and free all the data associated with it |
4406 | * (but not the AVCodecContext itself). |
4407 | * |
4408 | * Calling this function on an AVCodecContext that hasn't been opened will free |
4409 | * the codec-specific data allocated in avcodec_alloc_context3() with a non-NULL |
4410 | * codec. Subsequent calls will do nothing. |
4411 | * |
4412 | * @note Do not use this function. Use avcodec_free_context() to destroy a |
4413 | * codec context (either open or closed). Opening and closing a codec context |
4414 | * multiple times is not supported anymore -- use multiple codec contexts |
4415 | * instead. |
4416 | */ |
4417 | int avcodec_close(AVCodecContext *avctx); |
4418 | |
4419 | /** |
4420 | * Free all allocated data in the given subtitle struct. |
4421 | * |
4422 | * @param sub AVSubtitle to free. |
4423 | */ |
4424 | void avsubtitle_free(AVSubtitle *sub); |
4425 | |
4426 | /** |
4427 | * @} |
4428 | */ |
4429 | |
4430 | /** |
4431 | * @addtogroup lavc_packet |
4432 | * @{ |
4433 | */ |
4434 | |
4435 | /** |
4436 | * Allocate an AVPacket and set its fields to default values. The resulting |
4437 | * struct must be freed using av_packet_free(). |
4438 | * |
4439 | * @return An AVPacket filled with default values or NULL on failure. |
4440 | * |
4441 | * @note this only allocates the AVPacket itself, not the data buffers. Those |
4442 | * must be allocated through other means such as av_new_packet. |
4443 | * |
4444 | * @see av_new_packet |
4445 | */ |
4446 | AVPacket *av_packet_alloc(void); |
4447 | |
4448 | /** |
4449 | * Create a new packet that references the same data as src. |
4450 | * |
4451 | * This is a shortcut for av_packet_alloc()+av_packet_ref(). |
4452 | * |
4453 | * @return newly created AVPacket on success, NULL on error. |
4454 | * |
4455 | * @see av_packet_alloc |
4456 | * @see av_packet_ref |
4457 | */ |
4458 | AVPacket *av_packet_clone(const AVPacket *src); |
4459 | |
4460 | /** |
4461 | * Free the packet, if the packet is reference counted, it will be |
4462 | * unreferenced first. |
4463 | * |
4464 | * @param packet packet to be freed. The pointer will be set to NULL. |
4465 | * @note passing NULL is a no-op. |
4466 | */ |
4467 | void av_packet_free(AVPacket **pkt); |
4468 | |
4469 | /** |
4470 | * Initialize optional fields of a packet with default values. |
4471 | * |
4472 | * Note, this does not touch the data and size members, which have to be |
4473 | * initialized separately. |
4474 | * |
4475 | * @param pkt packet |
4476 | */ |
4477 | void av_init_packet(AVPacket *pkt); |
4478 | |
4479 | /** |
4480 | * Allocate the payload of a packet and initialize its fields with |
4481 | * default values. |
4482 | * |
4483 | * @param pkt packet |
4484 | * @param size wanted payload size |
4485 | * @return 0 if OK, AVERROR_xxx otherwise |
4486 | */ |
4487 | int av_new_packet(AVPacket *pkt, int size); |
4488 | |
4489 | /** |
4490 | * Reduce packet size, correctly zeroing padding |
4491 | * |
4492 | * @param pkt packet |
4493 | * @param size new size |
4494 | */ |
4495 | void av_shrink_packet(AVPacket *pkt, int size); |
4496 | |
4497 | /** |
4498 | * Increase packet size, correctly zeroing padding |
4499 | * |
4500 | * @param pkt packet |
4501 | * @param grow_by number of bytes by which to increase the size of the packet |
4502 | */ |
4503 | int av_grow_packet(AVPacket *pkt, int grow_by); |
4504 | |
4505 | /** |
4506 | * Initialize a reference-counted packet from av_malloc()ed data. |
4507 | * |
4508 | * @param pkt packet to be initialized. This function will set the data, size, |
4509 | * buf and destruct fields, all others are left untouched. |
4510 | * @param data Data allocated by av_malloc() to be used as packet data. If this |
4511 | * function returns successfully, the data is owned by the underlying AVBuffer. |
4512 | * The caller may not access the data through other means. |
4513 | * @param size size of data in bytes, without the padding. I.e. the full buffer |
4514 | * size is assumed to be size + AV_INPUT_BUFFER_PADDING_SIZE. |
4515 | * |
4516 | * @return 0 on success, a negative AVERROR on error |
4517 | */ |
4518 | int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size); |
4519 | |
4520 | #if FF_API_AVPACKET_OLD_API |
4521 | /** |
4522 | * @warning This is a hack - the packet memory allocation stuff is broken. The |
4523 | * packet is allocated if it was not really allocated. |
4524 | * |
4525 | * @deprecated Use av_packet_ref |
4526 | */ |
4527 | attribute_deprecated |
4528 | int av_dup_packet(AVPacket *pkt); |
4529 | /** |
4530 | * Copy packet, including contents |
4531 | * |
4532 | * @return 0 on success, negative AVERROR on fail |
4533 | */ |
4534 | int av_copy_packet(AVPacket *dst, const AVPacket *src); |
4535 | |
4536 | /** |
4537 | * Copy packet side data |
4538 | * |
4539 | * @return 0 on success, negative AVERROR on fail |
4540 | */ |
4541 | int av_copy_packet_side_data(AVPacket *dst, const AVPacket *src); |
4542 | |
4543 | /** |
4544 | * Free a packet. |
4545 | * |
4546 | * @deprecated Use av_packet_unref |
4547 | * |
4548 | * @param pkt packet to free |
4549 | */ |
4550 | attribute_deprecated |
4551 | void av_free_packet(AVPacket *pkt); |
4552 | #endif |
4553 | /** |
4554 | * Allocate new information of a packet. |
4555 | * |
4556 | * @param pkt packet |
4557 | * @param type side information type |
4558 | * @param size side information size |
4559 | * @return pointer to fresh allocated data or NULL otherwise |
4560 | */ |
4561 | uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
4562 | int size); |
4563 | |
4564 | /** |
4565 | * Wrap an existing array as a packet side data. |
4566 | * |
4567 | * @param pkt packet |
4568 | * @param type side information type |
4569 | * @param data the side data array. It must be allocated with the av_malloc() |
4570 | * family of functions. The ownership of the data is transferred to |
4571 | * pkt. |
4572 | * @param size side information size |
4573 | * @return a non-negative number on success, a negative AVERROR code on |
4574 | * failure. On failure, the packet is unchanged and the data remains |
4575 | * owned by the caller. |
4576 | */ |
4577 | int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
4578 | uint8_t *data, size_t size); |
4579 | |
4580 | /** |
4581 | * Shrink the already allocated side data buffer |
4582 | * |
4583 | * @param pkt packet |
4584 | * @param type side information type |
4585 | * @param size new side information size |
4586 | * @return 0 on success, < 0 on failure |
4587 | */ |
4588 | int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
4589 | int size); |
4590 | |
4591 | /** |
4592 | * Get side information from packet. |
4593 | * |
4594 | * @param pkt packet |
4595 | * @param type desired side information type |
4596 | * @param size pointer for side information size to store (optional) |
4597 | * @return pointer to data if present or NULL otherwise |
4598 | */ |
4599 | uint8_t* av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, |
4600 | int *size); |
4601 | |
4602 | #if FF_API_MERGE_SD_API |
4603 | attribute_deprecated |
4604 | int av_packet_merge_side_data(AVPacket *pkt); |
4605 | |
4606 | attribute_deprecated |
4607 | int av_packet_split_side_data(AVPacket *pkt); |
4608 | #endif |
4609 | |
4610 | const char *av_packet_side_data_name(enum AVPacketSideDataType type); |
4611 | |
4612 | /** |
4613 | * Pack a dictionary for use in side_data. |
4614 | * |
4615 | * @param dict The dictionary to pack. |
4616 | * @param size pointer to store the size of the returned data |
4617 | * @return pointer to data if successful, NULL otherwise |
4618 | */ |
4619 | uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size); |
4620 | /** |
4621 | * Unpack a dictionary from side_data. |
4622 | * |
4623 | * @param data data from side_data |
4624 | * @param size size of the data |
4625 | * @param dict the metadata storage dictionary |
4626 | * @return 0 on success, < 0 on failure |
4627 | */ |
4628 | int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict); |
4629 | |
4630 | |
4631 | /** |
4632 | * Convenience function to free all the side data stored. |
4633 | * All the other fields stay untouched. |
4634 | * |
4635 | * @param pkt packet |
4636 | */ |
4637 | void av_packet_free_side_data(AVPacket *pkt); |
4638 | |
4639 | /** |
4640 | * Setup a new reference to the data described by a given packet |
4641 | * |
4642 | * If src is reference-counted, setup dst as a new reference to the |
4643 | * buffer in src. Otherwise allocate a new buffer in dst and copy the |
4644 | * data from src into it. |
4645 | * |
4646 | * All the other fields are copied from src. |
4647 | * |
4648 | * @see av_packet_unref |
4649 | * |
4650 | * @param dst Destination packet |
4651 | * @param src Source packet |
4652 | * |
4653 | * @return 0 on success, a negative AVERROR on error. |
4654 | */ |
4655 | int av_packet_ref(AVPacket *dst, const AVPacket *src); |
4656 | |
4657 | /** |
4658 | * Wipe the packet. |
4659 | * |
4660 | * Unreference the buffer referenced by the packet and reset the |
4661 | * remaining packet fields to their default values. |
4662 | * |
4663 | * @param pkt The packet to be unreferenced. |
4664 | */ |
4665 | void av_packet_unref(AVPacket *pkt); |
4666 | |
4667 | /** |
4668 | * Move every field in src to dst and reset src. |
4669 | * |
4670 | * @see av_packet_unref |
4671 | * |
4672 | * @param src Source packet, will be reset |
4673 | * @param dst Destination packet |
4674 | */ |
4675 | void av_packet_move_ref(AVPacket *dst, AVPacket *src); |
4676 | |
4677 | /** |
4678 | * Copy only "properties" fields from src to dst. |
4679 | * |
4680 | * Properties for the purpose of this function are all the fields |
4681 | * beside those related to the packet data (buf, data, size) |
4682 | * |
4683 | * @param dst Destination packet |
4684 | * @param src Source packet |
4685 | * |
4686 | * @return 0 on success AVERROR on failure. |
4687 | */ |
4688 | int av_packet_copy_props(AVPacket *dst, const AVPacket *src); |
4689 | |
4690 | /** |
4691 | * Convert valid timing fields (timestamps / durations) in a packet from one |
4692 | * timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be |
4693 | * ignored. |
4694 | * |
4695 | * @param pkt packet on which the conversion will be performed |
4696 | * @param tb_src source timebase, in which the timing fields in pkt are |
4697 | * expressed |
4698 | * @param tb_dst destination timebase, to which the timing fields will be |
4699 | * converted |
4700 | */ |
4701 | void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst); |
4702 | |
4703 | /** |
4704 | * @} |
4705 | */ |
4706 | |
4707 | /** |
4708 | * @addtogroup lavc_decoding |
4709 | * @{ |
4710 | */ |
4711 | |
4712 | /** |
4713 | * Find a registered decoder with a matching codec ID. |
4714 | * |
4715 | * @param id AVCodecID of the requested decoder |
4716 | * @return A decoder if one was found, NULL otherwise. |
4717 | */ |
4718 | AVCodec *avcodec_find_decoder(enum AVCodecID id); |
4719 | |
4720 | /** |
4721 | * Find a registered decoder with the specified name. |
4722 | * |
4723 | * @param name name of the requested decoder |
4724 | * @return A decoder if one was found, NULL otherwise. |
4725 | */ |
4726 | AVCodec *avcodec_find_decoder_by_name(const char *name); |
4727 | |
4728 | /** |
4729 | * The default callback for AVCodecContext.get_buffer2(). It is made public so |
4730 | * it can be called by custom get_buffer2() implementations for decoders without |
4731 | * AV_CODEC_CAP_DR1 set. |
4732 | */ |
4733 | int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags); |
4734 | |
4735 | #if FF_API_EMU_EDGE |
4736 | /** |
4737 | * Return the amount of padding in pixels which the get_buffer callback must |
4738 | * provide around the edge of the image for codecs which do not have the |
4739 | * CODEC_FLAG_EMU_EDGE flag. |
4740 | * |
4741 | * @return Required padding in pixels. |
4742 | * |
4743 | * @deprecated CODEC_FLAG_EMU_EDGE is deprecated, so this function is no longer |
4744 | * needed |
4745 | */ |
4746 | attribute_deprecated |
4747 | unsigned avcodec_get_edge_width(void); |
4748 | #endif |
4749 | |
4750 | /** |
4751 | * Modify width and height values so that they will result in a memory |
4752 | * buffer that is acceptable for the codec if you do not use any horizontal |
4753 | * padding. |
4754 | * |
4755 | * May only be used if a codec with AV_CODEC_CAP_DR1 has been opened. |
4756 | */ |
4757 | void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height); |
4758 | |
4759 | /** |
4760 | * Modify width and height values so that they will result in a memory |
4761 | * buffer that is acceptable for the codec if you also ensure that all |
4762 | * line sizes are a multiple of the respective linesize_align[i]. |
4763 | * |
4764 | * May only be used if a codec with AV_CODEC_CAP_DR1 has been opened. |
4765 | */ |
4766 | void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, |
4767 | int linesize_align[AV_NUM_DATA_POINTERS]); |
4768 | |
4769 | /** |
4770 | * Converts AVChromaLocation to swscale x/y chroma position. |
4771 | * |
4772 | * The positions represent the chroma (0,0) position in a coordinates system |
4773 | * with luma (0,0) representing the origin and luma(1,1) representing 256,256 |
4774 | * |
4775 | * @param xpos horizontal chroma sample position |
4776 | * @param ypos vertical chroma sample position |
4777 | */ |
4778 | int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos); |
4779 | |
4780 | /** |
4781 | * Converts swscale x/y chroma position to AVChromaLocation. |
4782 | * |
4783 | * The positions represent the chroma (0,0) position in a coordinates system |
4784 | * with luma (0,0) representing the origin and luma(1,1) representing 256,256 |
4785 | * |
4786 | * @param xpos horizontal chroma sample position |
4787 | * @param ypos vertical chroma sample position |
4788 | */ |
4789 | enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos); |
4790 | |
4791 | /** |
4792 | * Decode the audio frame of size avpkt->size from avpkt->data into frame. |
4793 | * |
4794 | * Some decoders may support multiple frames in a single AVPacket. Such |
4795 | * decoders would then just decode the first frame and the return value would be |
4796 | * less than the packet size. In this case, avcodec_decode_audio4 has to be |
4797 | * called again with an AVPacket containing the remaining data in order to |
4798 | * decode the second frame, etc... Even if no frames are returned, the packet |
4799 | * needs to be fed to the decoder with remaining data until it is completely |
4800 | * consumed or an error occurs. |
4801 | * |
4802 | * Some decoders (those marked with AV_CODEC_CAP_DELAY) have a delay between input |
4803 | * and output. This means that for some packets they will not immediately |
4804 | * produce decoded output and need to be flushed at the end of decoding to get |
4805 | * all the decoded data. Flushing is done by calling this function with packets |
4806 | * with avpkt->data set to NULL and avpkt->size set to 0 until it stops |
4807 | * returning samples. It is safe to flush even those decoders that are not |
4808 | * marked with AV_CODEC_CAP_DELAY, then no samples will be returned. |
4809 | * |
4810 | * @warning The input buffer, avpkt->data must be AV_INPUT_BUFFER_PADDING_SIZE |
4811 | * larger than the actual read bytes because some optimized bitstream |
4812 | * readers read 32 or 64 bits at once and could read over the end. |
4813 | * |
4814 | * @note The AVCodecContext MUST have been opened with @ref avcodec_open2() |
4815 | * before packets may be fed to the decoder. |
4816 | * |
4817 | * @param avctx the codec context |
4818 | * @param[out] frame The AVFrame in which to store decoded audio samples. |
4819 | * The decoder will allocate a buffer for the decoded frame by |
4820 | * calling the AVCodecContext.get_buffer2() callback. |
4821 | * When AVCodecContext.refcounted_frames is set to 1, the frame is |
4822 | * reference counted and the returned reference belongs to the |
4823 | * caller. The caller must release the frame using av_frame_unref() |
4824 | * when the frame is no longer needed. The caller may safely write |
4825 | * to the frame if av_frame_is_writable() returns 1. |
4826 | * When AVCodecContext.refcounted_frames is set to 0, the returned |
4827 | * reference belongs to the decoder and is valid only until the |
4828 | * next call to this function or until closing or flushing the |
4829 | * decoder. The caller may not write to it. |
4830 | * @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is |
4831 | * non-zero. Note that this field being set to zero |
4832 | * does not mean that an error has occurred. For |
4833 | * decoders with AV_CODEC_CAP_DELAY set, no given decode |
4834 | * call is guaranteed to produce a frame. |
4835 | * @param[in] avpkt The input AVPacket containing the input buffer. |
4836 | * At least avpkt->data and avpkt->size should be set. Some |
4837 | * decoders might also require additional fields to be set. |
4838 | * @return A negative error code is returned if an error occurred during |
4839 | * decoding, otherwise the number of bytes consumed from the input |
4840 | * AVPacket is returned. |
4841 | * |
4842 | * @deprecated Use avcodec_send_packet() and avcodec_receive_frame(). |
4843 | */ |
4844 | attribute_deprecated |
4845 | int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, |
4846 | int *got_frame_ptr, const AVPacket *avpkt); |
4847 | |
4848 | /** |
4849 | * Decode the video frame of size avpkt->size from avpkt->data into picture. |
4850 | * Some decoders may support multiple frames in a single AVPacket, such |
4851 | * decoders would then just decode the first frame. |
4852 | * |
4853 | * @warning The input buffer must be AV_INPUT_BUFFER_PADDING_SIZE larger than |
4854 | * the actual read bytes because some optimized bitstream readers read 32 or 64 |
4855 | * bits at once and could read over the end. |
4856 | * |
4857 | * @warning The end of the input buffer buf should be set to 0 to ensure that |
4858 | * no overreading happens for damaged MPEG streams. |
4859 | * |
4860 | * @note Codecs which have the AV_CODEC_CAP_DELAY capability set have a delay |
4861 | * between input and output, these need to be fed with avpkt->data=NULL, |
4862 | * avpkt->size=0 at the end to return the remaining frames. |
4863 | * |
4864 | * @note The AVCodecContext MUST have been opened with @ref avcodec_open2() |
4865 | * before packets may be fed to the decoder. |
4866 | * |
4867 | * @param avctx the codec context |
4868 | * @param[out] picture The AVFrame in which the decoded video frame will be stored. |
4869 | * Use av_frame_alloc() to get an AVFrame. The codec will |
4870 | * allocate memory for the actual bitmap by calling the |
4871 | * AVCodecContext.get_buffer2() callback. |
4872 | * When AVCodecContext.refcounted_frames is set to 1, the frame is |
4873 | * reference counted and the returned reference belongs to the |
4874 | * caller. The caller must release the frame using av_frame_unref() |
4875 | * when the frame is no longer needed. The caller may safely write |
4876 | * to the frame if av_frame_is_writable() returns 1. |
4877 | * When AVCodecContext.refcounted_frames is set to 0, the returned |
4878 | * reference belongs to the decoder and is valid only until the |
4879 | * next call to this function or until closing or flushing the |
4880 | * decoder. The caller may not write to it. |
4881 | * |
4882 | * @param[in] avpkt The input AVPacket containing the input buffer. |
4883 | * You can create such packet with av_init_packet() and by then setting |
4884 | * data and size, some decoders might in addition need other fields like |
4885 | * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least |
4886 | * fields possible. |
4887 | * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero. |
4888 | * @return On error a negative value is returned, otherwise the number of bytes |
4889 | * used or zero if no frame could be decompressed. |
4890 | * |
4891 | * @deprecated Use avcodec_send_packet() and avcodec_receive_frame(). |
4892 | */ |
4893 | attribute_deprecated |
4894 | int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, |
4895 | int *got_picture_ptr, |
4896 | const AVPacket *avpkt); |
4897 | |
4898 | /** |
4899 | * Decode a subtitle message. |
4900 | * Return a negative value on error, otherwise return the number of bytes used. |
4901 | * If no subtitle could be decompressed, got_sub_ptr is zero. |
4902 | * Otherwise, the subtitle is stored in *sub. |
4903 | * Note that AV_CODEC_CAP_DR1 is not available for subtitle codecs. This is for |
4904 | * simplicity, because the performance difference is expect to be negligible |
4905 | * and reusing a get_buffer written for video codecs would probably perform badly |
4906 | * due to a potentially very different allocation pattern. |
4907 | * |
4908 | * Some decoders (those marked with CODEC_CAP_DELAY) have a delay between input |
4909 | * and output. This means that for some packets they will not immediately |
4910 | * produce decoded output and need to be flushed at the end of decoding to get |
4911 | * all the decoded data. Flushing is done by calling this function with packets |
4912 | * with avpkt->data set to NULL and avpkt->size set to 0 until it stops |
4913 | * returning subtitles. It is safe to flush even those decoders that are not |
4914 | * marked with CODEC_CAP_DELAY, then no subtitles will be returned. |
4915 | * |
4916 | * @note The AVCodecContext MUST have been opened with @ref avcodec_open2() |
4917 | * before packets may be fed to the decoder. |
4918 | * |
4919 | * @param avctx the codec context |
4920 | * @param[out] sub The Preallocated AVSubtitle in which the decoded subtitle will be stored, |
4921 | * must be freed with avsubtitle_free if *got_sub_ptr is set. |
4922 | * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero. |
4923 | * @param[in] avpkt The input AVPacket containing the input buffer. |
4924 | */ |
4925 | int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, |
4926 | int *got_sub_ptr, |
4927 | AVPacket *avpkt); |
4928 | |
4929 | /** |
4930 | * Supply raw packet data as input to a decoder. |
4931 | * |
4932 | * Internally, this call will copy relevant AVCodecContext fields, which can |
4933 | * influence decoding per-packet, and apply them when the packet is actually |
4934 | * decoded. (For example AVCodecContext.skip_frame, which might direct the |
4935 | * decoder to drop the frame contained by the packet sent with this function.) |
4936 | * |
4937 | * @warning The input buffer, avpkt->data must be AV_INPUT_BUFFER_PADDING_SIZE |
4938 | * larger than the actual read bytes because some optimized bitstream |
4939 | * readers read 32 or 64 bits at once and could read over the end. |
4940 | * |
4941 | * @warning Do not mix this API with the legacy API (like avcodec_decode_video2()) |
4942 | * on the same AVCodecContext. It will return unexpected results now |
4943 | * or in future libavcodec versions. |
4944 | * |
4945 | * @note The AVCodecContext MUST have been opened with @ref avcodec_open2() |
4946 | * before packets may be fed to the decoder. |
4947 | * |
4948 | * @param avctx codec context |
4949 | * @param[in] avpkt The input AVPacket. Usually, this will be a single video |
4950 | * frame, or several complete audio frames. |
4951 | * Ownership of the packet remains with the caller, and the |
4952 | * decoder will not write to the packet. The decoder may create |
4953 | * a reference to the packet data (or copy it if the packet is |
4954 | * not reference-counted). |
4955 | * Unlike with older APIs, the packet is always fully consumed, |
4956 | * and if it contains multiple frames (e.g. some audio codecs), |
4957 | * will require you to call avcodec_receive_frame() multiple |
4958 | * times afterwards before you can send a new packet. |
4959 | * It can be NULL (or an AVPacket with data set to NULL and |
4960 | * size set to 0); in this case, it is considered a flush |
4961 | * packet, which signals the end of the stream. Sending the |
4962 | * first flush packet will return success. Subsequent ones are |
4963 | * unnecessary and will return AVERROR_EOF. If the decoder |
4964 | * still has frames buffered, it will return them after sending |
4965 | * a flush packet. |
4966 | * |
4967 | * @return 0 on success, otherwise negative error code: |
4968 | * AVERROR(EAGAIN): input is not accepted in the current state - user |
4969 | * must read output with avcodec_receive_frame() (once |
4970 | * all output is read, the packet should be resent, and |
4971 | * the call will not fail with EAGAIN). |
4972 | * AVERROR_EOF: the decoder has been flushed, and no new packets can |
4973 | * be sent to it (also returned if more than 1 flush |
4974 | * packet is sent) |
4975 | * AVERROR(EINVAL): codec not opened, it is an encoder, or requires flush |
4976 | * AVERROR(ENOMEM): failed to add packet to internal queue, or similar |
4977 | * other errors: legitimate decoding errors |
4978 | */ |
4979 | int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt); |
4980 | |
4981 | /** |
4982 | * Return decoded output data from a decoder. |
4983 | * |
4984 | * @param avctx codec context |
4985 | * @param frame This will be set to a reference-counted video or audio |
4986 | * frame (depending on the decoder type) allocated by the |
4987 | * decoder. Note that the function will always call |
4988 | * av_frame_unref(frame) before doing anything else. |
4989 | * |
4990 | * @return |
4991 | * 0: success, a frame was returned |
4992 | * AVERROR(EAGAIN): output is not available in this state - user must try |
4993 | * to send new input |
4994 | * AVERROR_EOF: the decoder has been fully flushed, and there will be |
4995 | * no more output frames |
4996 | * AVERROR(EINVAL): codec not opened, or it is an encoder |
4997 | * other negative values: legitimate decoding errors |
4998 | */ |
4999 | int avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame); |
5000 | |
5001 | /** |
5002 | * Supply a raw video or audio frame to the encoder. Use avcodec_receive_packet() |
5003 | * to retrieve buffered output packets. |
5004 | * |
5005 | * @param avctx codec context |
5006 | * @param[in] frame AVFrame containing the raw audio or video frame to be encoded. |
5007 | * Ownership of the frame remains with the caller, and the |
5008 | * encoder will not write to the frame. The encoder may create |
5009 | * a reference to the frame data (or copy it if the frame is |
5010 | * not reference-counted). |
5011 | * It can be NULL, in which case it is considered a flush |
5012 | * packet. This signals the end of the stream. If the encoder |
5013 | * still has packets buffered, it will return them after this |
5014 | * call. Once flushing mode has been entered, additional flush |
5015 | * packets are ignored, and sending frames will return |
5016 | * AVERROR_EOF. |
5017 | * |
5018 | * For audio: |
5019 | * If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame |
5020 | * can have any number of samples. |
5021 | * If it is not set, frame->nb_samples must be equal to |
5022 | * avctx->frame_size for all frames except the last. |
5023 | * The final frame may be smaller than avctx->frame_size. |
5024 | * @return 0 on success, otherwise negative error code: |
5025 | * AVERROR(EAGAIN): input is not accepted in the current state - user |
5026 | * must read output with avcodec_receive_packet() (once |
5027 | * all output is read, the packet should be resent, and |
5028 | * the call will not fail with EAGAIN). |
5029 | * AVERROR_EOF: the encoder has been flushed, and no new frames can |
5030 | * be sent to it |
5031 | * AVERROR(EINVAL): codec not opened, refcounted_frames not set, it is a |
5032 | * decoder, or requires flush |
5033 | * AVERROR(ENOMEM): failed to add packet to internal queue, or similar |
5034 | * other errors: legitimate decoding errors |
5035 | */ |
5036 | int avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame); |
5037 | |
5038 | /** |
5039 | * Read encoded data from the encoder. |
5040 | * |
5041 | * @param avctx codec context |
5042 | * @param avpkt This will be set to a reference-counted packet allocated by the |
5043 | * encoder. Note that the function will always call |
5044 | * av_frame_unref(frame) before doing anything else. |
5045 | * @return 0 on success, otherwise negative error code: |
5046 | * AVERROR(EAGAIN): output is not available in the current state - user |
5047 | * must try to send input |
5048 | * AVERROR_EOF: the encoder has been fully flushed, and there will be |
5049 | * no more output packets |
5050 | * AVERROR(EINVAL): codec not opened, or it is an encoder |
5051 | * other errors: legitimate decoding errors |
5052 | */ |
5053 | int avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt); |
5054 | |
5055 | |
5056 | /** |
5057 | * @defgroup lavc_parsing Frame parsing |
5058 | * @{ |
5059 | */ |
5060 | |
5061 | enum AVPictureStructure { |
5062 | AV_PICTURE_STRUCTURE_UNKNOWN, //< unknown |
5063 | AV_PICTURE_STRUCTURE_TOP_FIELD, //< coded as top field |
5064 | AV_PICTURE_STRUCTURE_BOTTOM_FIELD, //< coded as bottom field |
5065 | AV_PICTURE_STRUCTURE_FRAME, //< coded as frame |
5066 | }; |
5067 | |
5068 | typedef struct AVCodecParserContext { |
5069 | void *priv_data; |
5070 | struct AVCodecParser *parser; |
5071 | int64_t frame_offset; /* offset of the current frame */ |
5072 | int64_t cur_offset; /* current offset |
5073 | (incremented by each av_parser_parse()) */ |
5074 | int64_t next_frame_offset; /* offset of the next frame */ |
5075 | /* video info */ |
5076 | int pict_type; /* XXX: Put it back in AVCodecContext. */ |
5077 | /** |
5078 | * This field is used for proper frame duration computation in lavf. |
5079 | * It signals, how much longer the frame duration of the current frame |
5080 | * is compared to normal frame duration. |
5081 | * |
5082 | * frame_duration = (1 + repeat_pict) * time_base |
5083 | * |
5084 | * It is used by codecs like H.264 to display telecined material. |
5085 | */ |
5086 | int repeat_pict; /* XXX: Put it back in AVCodecContext. */ |
5087 | int64_t pts; /* pts of the current frame */ |
5088 | int64_t dts; /* dts of the current frame */ |
5089 | |
5090 | /* private data */ |
5091 | int64_t last_pts; |
5092 | int64_t last_dts; |
5093 | int fetch_timestamp; |
5094 | |
5095 | #define AV_PARSER_PTS_NB 4 |
5096 | int cur_frame_start_index; |
5097 | int64_t cur_frame_offset[AV_PARSER_PTS_NB]; |
5098 | int64_t cur_frame_pts[AV_PARSER_PTS_NB]; |
5099 | int64_t cur_frame_dts[AV_PARSER_PTS_NB]; |
5100 | |
5101 | int flags; |
5102 | #define PARSER_FLAG_COMPLETE_FRAMES 0x0001 |
5103 | #define PARSER_FLAG_ONCE 0x0002 |
5104 | /// Set if the parser has a valid file offset |
5105 | #define PARSER_FLAG_FETCHED_OFFSET 0x0004 |
5106 | #define PARSER_FLAG_USE_CODEC_TS 0x1000 |
5107 | |
5108 | /*for dolby vision flag*/ |
5109 | #define PARSER_FLAG_HAS_DV_META 0x0008 |
5110 | |
5111 | int64_t offset; ///< byte offset from starting packet start |
5112 | int64_t cur_frame_end[AV_PARSER_PTS_NB]; |
5113 | |
5114 | /** |
5115 | * Set by parser to 1 for key frames and 0 for non-key frames. |
5116 | * It is initialized to -1, so if the parser doesn't set this flag, |
5117 | * old-style fallback using AV_PICTURE_TYPE_I picture type as key frames |
5118 | * will be used. |
5119 | */ |
5120 | int key_frame; |
5121 | |
5122 | #if FF_API_CONVERGENCE_DURATION |
5123 | /** |
5124 | * @deprecated unused |
5125 | */ |
5126 | attribute_deprecated |
5127 | int64_t convergence_duration; |
5128 | #endif |
5129 | |
5130 | // Timestamp generation support: |
5131 | /** |
5132 | * Synchronization point for start of timestamp generation. |
5133 | * |
5134 | * Set to >0 for sync point, 0 for no sync point and <0 for undefined |
5135 | * (default). |
5136 | * |
5137 | * For example, this corresponds to presence of H.264 buffering period |
5138 | * SEI message. |
5139 | */ |
5140 | int dts_sync_point; |
5141 | |
5142 | /** |
5143 | * Offset of the current timestamp against last timestamp sync point in |
5144 | * units of AVCodecContext.time_base. |
5145 | * |
5146 | * Set to INT_MIN when dts_sync_point unused. Otherwise, it must |
5147 | * contain a valid timestamp offset. |
5148 | * |
5149 | * Note that the timestamp of sync point has usually a nonzero |
5150 | * dts_ref_dts_delta, which refers to the previous sync point. Offset of |
5151 | * the next frame after timestamp sync point will be usually 1. |
5152 | * |
5153 | * For example, this corresponds to H.264 cpb_removal_delay. |
5154 | */ |
5155 | int dts_ref_dts_delta; |
5156 | |
5157 | /** |
5158 | * Presentation delay of current frame in units of AVCodecContext.time_base. |
5159 | * |
5160 | * Set to INT_MIN when dts_sync_point unused. Otherwise, it must |
5161 | * contain valid non-negative timestamp delta (presentation time of a frame |
5162 | * must not lie in the past). |
5163 | * |
5164 | * This delay represents the difference between decoding and presentation |
5165 | * time of the frame. |
5166 | * |
5167 | * For example, this corresponds to H.264 dpb_output_delay. |
5168 | */ |
5169 | int pts_dts_delta; |
5170 | |
5171 | /** |
5172 | * Position of the packet in file. |
5173 | * |
5174 | * Analogous to cur_frame_pts/dts |
5175 | */ |
5176 | int64_t cur_frame_pos[AV_PARSER_PTS_NB]; |
5177 | |
5178 | /** |
5179 | * Byte position of currently parsed frame in stream. |
5180 | */ |
5181 | int64_t pos; |
5182 | |
5183 | /** |
5184 | * Previous frame byte position. |
5185 | */ |
5186 | int64_t last_pos; |
5187 | |
5188 | /** |
5189 | * Duration of the current frame. |
5190 | * For audio, this is in units of 1 / AVCodecContext.sample_rate. |
5191 | * For all other types, this is in units of AVCodecContext.time_base. |
5192 | */ |
5193 | int duration; |
5194 | |
5195 | enum AVFieldOrder field_order; |
5196 | |
5197 | /** |
5198 | * Indicate whether a picture is coded as a frame, top field or bottom field. |
5199 | * |
5200 | * For example, H.264 field_pic_flag equal to 0 corresponds to |
5201 | * AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag |
5202 | * equal to 1 and bottom_field_flag equal to 0 corresponds to |
5203 | * AV_PICTURE_STRUCTURE_TOP_FIELD. |
5204 | */ |
5205 | enum AVPictureStructure picture_structure; |
5206 | |
5207 | /** |
5208 | * Picture number incremented in presentation or output order. |
5209 | * This field may be reinitialized at the first picture of a new sequence. |
5210 | * |
5211 | * For example, this corresponds to H.264 PicOrderCnt. |
5212 | */ |
5213 | int output_picture_number; |
5214 | |
5215 | /** |
5216 | * Dimensions of the decoded video intended for presentation. |
5217 | */ |
5218 | int width; |
5219 | int height; |
5220 | |
5221 | /** |
5222 | * Dimensions of the coded video. |
5223 | */ |
5224 | int coded_width; |
5225 | int coded_height; |
5226 | |
5227 | /** |
5228 | * The format of the coded data, corresponds to enum AVPixelFormat for video |
5229 | * and for enum AVSampleFormat for audio. |
5230 | * |
5231 | * Note that a decoder can have considerable freedom in how exactly it |
5232 | * decodes the data, so the format reported here might be different from the |
5233 | * one returned by a decoder. |
5234 | */ |
5235 | int format; |
5236 | } AVCodecParserContext; |
5237 | |
5238 | typedef struct AVCodecParser { |
5239 | int codec_ids[5]; /* several codec IDs are permitted */ |
5240 | int priv_data_size; |
5241 | int (*parser_init)(AVCodecParserContext *s); |
5242 | /* This callback never returns an error, a negative value means that |
5243 | * the frame start was in a previous packet. */ |
5244 | int (*parser_parse)(AVCodecParserContext *s, |
5245 | AVCodecContext *avctx, |
5246 | const uint8_t **poutbuf, int *poutbuf_size, |
5247 | const uint8_t *buf, int buf_size); |
5248 | void (*parser_close)(AVCodecParserContext *s); |
5249 | int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size); |
5250 | struct AVCodecParser *next; |
5251 | } AVCodecParser; |
5252 | |
5253 | AVCodecParser *av_parser_next(const AVCodecParser *c); |
5254 | |
5255 | void av_register_codec_parser(AVCodecParser *parser); |
5256 | AVCodecParserContext *av_parser_init(int codec_id); |
5257 | |
5258 | /** |
5259 | * Parse a packet. |
5260 | * |
5261 | * @param s parser context. |
5262 | * @param avctx codec context. |
5263 | * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished. |
5264 | * @param poutbuf_size set to size of parsed buffer or zero if not yet finished. |
5265 | * @param buf input buffer. |
5266 | * @param buf_size buffer size in bytes without the padding. I.e. the full buffer |
5267 | size is assumed to be buf_size + AV_INPUT_BUFFER_PADDING_SIZE. |
5268 | To signal EOF, this should be 0 (so that the last frame |
5269 | can be output). |
5270 | * @param pts input presentation timestamp. |
5271 | * @param dts input decoding timestamp. |
5272 | * @param pos input byte position in stream. |
5273 | * @return the number of bytes of the input bitstream used. |
5274 | * |
5275 | * Example: |
5276 | * @code |
5277 | * while(in_len){ |
5278 | * len = av_parser_parse2(myparser, AVCodecContext, &data, &size, |
5279 | * in_data, in_len, |
5280 | * pts, dts, pos); |
5281 | * in_data += len; |
5282 | * in_len -= len; |
5283 | * |
5284 | * if(size) |
5285 | * decode_frame(data, size); |
5286 | * } |
5287 | * @endcode |
5288 | */ |
5289 | int av_parser_parse2(AVCodecParserContext *s, |
5290 | AVCodecContext *avctx, |
5291 | uint8_t **poutbuf, int *poutbuf_size, |
5292 | const uint8_t *buf, int buf_size, |
5293 | int64_t pts, int64_t dts, |
5294 | int64_t pos); |
5295 | |
5296 | /** |
5297 | * @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed |
5298 | * @deprecated use AVBitStreamFilter |
5299 | */ |
5300 | int av_parser_change(AVCodecParserContext *s, |
5301 | AVCodecContext *avctx, |
5302 | uint8_t **poutbuf, int *poutbuf_size, |
5303 | const uint8_t *buf, int buf_size, int keyframe); |
5304 | void av_parser_close(AVCodecParserContext *s); |
5305 | |
5306 | /** |
5307 | * @} |
5308 | * @} |
5309 | */ |
5310 | |
5311 | /** |
5312 | * @addtogroup lavc_encoding |
5313 | * @{ |
5314 | */ |
5315 | |
5316 | /** |
5317 | * Find a registered encoder with a matching codec ID. |
5318 | * |
5319 | * @param id AVCodecID of the requested encoder |
5320 | * @return An encoder if one was found, NULL otherwise. |
5321 | */ |
5322 | AVCodec *avcodec_find_encoder(enum AVCodecID id); |
5323 | |
5324 | /** |
5325 | * Find a registered encoder with the specified name. |
5326 | * |
5327 | * @param name name of the requested encoder |
5328 | * @return An encoder if one was found, NULL otherwise. |
5329 | */ |
5330 | AVCodec *avcodec_find_encoder_by_name(const char *name); |
5331 | |
5332 | /** |
5333 | * Encode a frame of audio. |
5334 | * |
5335 | * Takes input samples from frame and writes the next output packet, if |
5336 | * available, to avpkt. The output packet does not necessarily contain data for |
5337 | * the most recent frame, as encoders can delay, split, and combine input frames |
5338 | * internally as needed. |
5339 | * |
5340 | * @param avctx codec context |
5341 | * @param avpkt output AVPacket. |
5342 | * The user can supply an output buffer by setting |
5343 | * avpkt->data and avpkt->size prior to calling the |
5344 | * function, but if the size of the user-provided data is not |
5345 | * large enough, encoding will fail. If avpkt->data and |
5346 | * avpkt->size are set, avpkt->destruct must also be set. All |
5347 | * other AVPacket fields will be reset by the encoder using |
5348 | * av_init_packet(). If avpkt->data is NULL, the encoder will |
5349 | * allocate it. The encoder will set avpkt->size to the size |
5350 | * of the output packet. |
5351 | * |
5352 | * If this function fails or produces no output, avpkt will be |
5353 | * freed using av_packet_unref(). |
5354 | * @param[in] frame AVFrame containing the raw audio data to be encoded. |
5355 | * May be NULL when flushing an encoder that has the |
5356 | * AV_CODEC_CAP_DELAY capability set. |
5357 | * If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame |
5358 | * can have any number of samples. |
5359 | * If it is not set, frame->nb_samples must be equal to |
5360 | * avctx->frame_size for all frames except the last. |
5361 | * The final frame may be smaller than avctx->frame_size. |
5362 | * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the |
5363 | * output packet is non-empty, and to 0 if it is |
5364 | * empty. If the function returns an error, the |
5365 | * packet can be assumed to be invalid, and the |
5366 | * value of got_packet_ptr is undefined and should |
5367 | * not be used. |
5368 | * @return 0 on success, negative error code on failure |
5369 | * |
5370 | * @deprecated use avcodec_send_frame()/avcodec_receive_packet() instead |
5371 | */ |
5372 | attribute_deprecated |
5373 | int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, |
5374 | const AVFrame *frame, int *got_packet_ptr); |
5375 | |
5376 | /** |
5377 | * Encode a frame of video. |
5378 | * |
5379 | * Takes input raw video data from frame and writes the next output packet, if |
5380 | * available, to avpkt. The output packet does not necessarily contain data for |
5381 | * the most recent frame, as encoders can delay and reorder input frames |
5382 | * internally as needed. |
5383 | * |
5384 | * @param avctx codec context |
5385 | * @param avpkt output AVPacket. |
5386 | * The user can supply an output buffer by setting |
5387 | * avpkt->data and avpkt->size prior to calling the |
5388 | * function, but if the size of the user-provided data is not |
5389 | * large enough, encoding will fail. All other AVPacket fields |
5390 | * will be reset by the encoder using av_init_packet(). If |
5391 | * avpkt->data is NULL, the encoder will allocate it. |
5392 | * The encoder will set avpkt->size to the size of the |
5393 | * output packet. The returned data (if any) belongs to the |
5394 | * caller, he is responsible for freeing it. |
5395 | * |
5396 | * If this function fails or produces no output, avpkt will be |
5397 | * freed using av_packet_unref(). |
5398 | * @param[in] frame AVFrame containing the raw video data to be encoded. |
5399 | * May be NULL when flushing an encoder that has the |
5400 | * AV_CODEC_CAP_DELAY capability set. |
5401 | * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the |
5402 | * output packet is non-empty, and to 0 if it is |
5403 | * empty. If the function returns an error, the |
5404 | * packet can be assumed to be invalid, and the |
5405 | * value of got_packet_ptr is undefined and should |
5406 | * not be used. |
5407 | * @return 0 on success, negative error code on failure |
5408 | * |
5409 | * @deprecated use avcodec_send_frame()/avcodec_receive_packet() instead |
5410 | */ |
5411 | attribute_deprecated |
5412 | int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt, |
5413 | const AVFrame *frame, int *got_packet_ptr); |
5414 | |
5415 | int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size, |
5416 | const AVSubtitle *sub); |
5417 | |
5418 | |
5419 | /** |
5420 | * @} |
5421 | */ |
5422 | |
5423 | #if FF_API_AVCODEC_RESAMPLE |
5424 | /** |
5425 | * @defgroup lavc_resample Audio resampling |
5426 | * @ingroup libavc |
5427 | * @deprecated use libswresample instead |
5428 | * |
5429 | * @{ |
5430 | */ |
5431 | struct ReSampleContext; |
5432 | struct AVResampleContext; |
5433 | |
5434 | typedef struct ReSampleContext ReSampleContext; |
5435 | |
5436 | /** |
5437 | * Initialize audio resampling context. |
5438 | * |
5439 | * @param output_channels number of output channels |
5440 | * @param input_channels number of input channels |
5441 | * @param output_rate output sample rate |
5442 | * @param input_rate input sample rate |
5443 | * @param sample_fmt_out requested output sample format |
5444 | * @param sample_fmt_in input sample format |
5445 | * @param filter_length length of each FIR filter in the filterbank relative to the cutoff frequency |
5446 | * @param log2_phase_count log2 of the number of entries in the polyphase filterbank |
5447 | * @param linear if 1 then the used FIR filter will be linearly interpolated |
5448 | between the 2 closest, if 0 the closest will be used |
5449 | * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate |
5450 | * @return allocated ReSampleContext, NULL if error occurred |
5451 | */ |
5452 | attribute_deprecated |
5453 | ReSampleContext *av_audio_resample_init(int output_channels, int input_channels, |
5454 | int output_rate, int input_rate, |
5455 | enum AVSampleFormat sample_fmt_out, |
5456 | enum AVSampleFormat sample_fmt_in, |
5457 | int filter_length, int log2_phase_count, |
5458 | int linear, double cutoff); |
5459 | |
5460 | attribute_deprecated |
5461 | int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples); |
5462 | |
5463 | /** |
5464 | * Free resample context. |
5465 | * |
5466 | * @param s a non-NULL pointer to a resample context previously |
5467 | * created with av_audio_resample_init() |
5468 | */ |
5469 | attribute_deprecated |
5470 | void audio_resample_close(ReSampleContext *s); |
5471 | |
5472 | |
5473 | /** |
5474 | * Initialize an audio resampler. |
5475 | * Note, if either rate is not an integer then simply scale both rates up so they are. |
5476 | * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq |
5477 | * @param log2_phase_count log2 of the number of entries in the polyphase filterbank |
5478 | * @param linear If 1 then the used FIR filter will be linearly interpolated |
5479 | between the 2 closest, if 0 the closest will be used |
5480 | * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate |
5481 | */ |
5482 | attribute_deprecated |
5483 | struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff); |
5484 | |
5485 | /** |
5486 | * Resample an array of samples using a previously configured context. |
5487 | * @param src an array of unconsumed samples |
5488 | * @param consumed the number of samples of src which have been consumed are returned here |
5489 | * @param src_size the number of unconsumed samples available |
5490 | * @param dst_size the amount of space in samples available in dst |
5491 | * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context. |
5492 | * @return the number of samples written in dst or -1 if an error occurred |
5493 | */ |
5494 | attribute_deprecated |
5495 | int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx); |
5496 | |
5497 | |
5498 | /** |
5499 | * Compensate samplerate/timestamp drift. The compensation is done by changing |
5500 | * the resampler parameters, so no audible clicks or similar distortions occur |
5501 | * @param compensation_distance distance in output samples over which the compensation should be performed |
5502 | * @param sample_delta number of output samples which should be output less |
5503 | * |
5504 | * example: av_resample_compensate(c, 10, 500) |
5505 | * here instead of 510 samples only 500 samples would be output |
5506 | * |
5507 | * note, due to rounding the actual compensation might be slightly different, |
5508 | * especially if the compensation_distance is large and the in_rate used during init is small |
5509 | */ |
5510 | attribute_deprecated |
5511 | void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance); |
5512 | attribute_deprecated |
5513 | void av_resample_close(struct AVResampleContext *c); |
5514 | |
5515 | /** |
5516 | * @} |
5517 | */ |
5518 | #endif |
5519 | |
5520 | #if FF_API_AVPICTURE |
5521 | /** |
5522 | * @addtogroup lavc_picture |
5523 | * @{ |
5524 | */ |
5525 | |
5526 | /** |
5527 | * @deprecated unused |
5528 | */ |
5529 | attribute_deprecated |
5530 | int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height); |
5531 | |
5532 | /** |
5533 | * @deprecated unused |
5534 | */ |
5535 | attribute_deprecated |
5536 | void avpicture_free(AVPicture *picture); |
5537 | |
5538 | /** |
5539 | * @deprecated use av_image_fill_arrays() instead. |
5540 | */ |
5541 | attribute_deprecated |
5542 | int avpicture_fill(AVPicture *picture, const uint8_t *ptr, |
5543 | enum AVPixelFormat pix_fmt, int width, int height); |
5544 | |
5545 | /** |
5546 | * @deprecated use av_image_copy_to_buffer() instead. |
5547 | */ |
5548 | attribute_deprecated |
5549 | int avpicture_layout(const AVPicture *src, enum AVPixelFormat pix_fmt, |
5550 | int width, int height, |
5551 | unsigned char *dest, int dest_size); |
5552 | |
5553 | /** |
5554 | * @deprecated use av_image_get_buffer_size() instead. |
5555 | */ |
5556 | attribute_deprecated |
5557 | int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height); |
5558 | |
5559 | /** |
5560 | * @deprecated av_image_copy() instead. |
5561 | */ |
5562 | attribute_deprecated |
5563 | void av_picture_copy(AVPicture *dst, const AVPicture *src, |
5564 | enum AVPixelFormat pix_fmt, int width, int height); |
5565 | |
5566 | /** |
5567 | * @deprecated unused |
5568 | */ |
5569 | attribute_deprecated |
5570 | int av_picture_crop(AVPicture *dst, const AVPicture *src, |
5571 | enum AVPixelFormat pix_fmt, int top_band, int left_band); |
5572 | |
5573 | /** |
5574 | * @deprecated unused |
5575 | */ |
5576 | attribute_deprecated |
5577 | int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt, |
5578 | int padtop, int padbottom, int padleft, int padright, int *color); |
5579 | |
5580 | /** |
5581 | * @} |
5582 | */ |
5583 | #endif |
5584 | |
5585 | /** |
5586 | * @defgroup lavc_misc Utility functions |
5587 | * @ingroup libavc |
5588 | * |
5589 | * Miscellaneous utility functions related to both encoding and decoding |
5590 | * (or neither). |
5591 | * @{ |
5592 | */ |
5593 | |
5594 | /** |
5595 | * @defgroup lavc_misc_pixfmt Pixel formats |
5596 | * |
5597 | * Functions for working with pixel formats. |
5598 | * @{ |
5599 | */ |
5600 | |
5601 | /** |
5602 | * Utility function to access log2_chroma_w log2_chroma_h from |
5603 | * the pixel format AVPixFmtDescriptor. |
5604 | * |
5605 | * This function asserts that pix_fmt is valid. See av_pix_fmt_get_chroma_sub_sample |
5606 | * for one that returns a failure code and continues in case of invalid |
5607 | * pix_fmts. |
5608 | * |
5609 | * @param[in] pix_fmt the pixel format |
5610 | * @param[out] h_shift store log2_chroma_w |
5611 | * @param[out] v_shift store log2_chroma_h |
5612 | * |
5613 | * @see av_pix_fmt_get_chroma_sub_sample |
5614 | */ |
5615 | |
5616 | void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift); |
5617 | |
5618 | /** |
5619 | * Return a value representing the fourCC code associated to the |
5620 | * pixel format pix_fmt, or 0 if no associated fourCC code can be |
5621 | * found. |
5622 | */ |
5623 | unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt); |
5624 | |
5625 | /** |
5626 | * @deprecated see av_get_pix_fmt_loss() |
5627 | */ |
5628 | int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt, |
5629 | int has_alpha); |
5630 | |
5631 | /** |
5632 | * Find the best pixel format to convert to given a certain source pixel |
5633 | * format. When converting from one pixel format to another, information loss |
5634 | * may occur. For example, when converting from RGB24 to GRAY, the color |
5635 | * information will be lost. Similarly, other losses occur when converting from |
5636 | * some formats to other formats. avcodec_find_best_pix_fmt_of_2() searches which of |
5637 | * the given pixel formats should be used to suffer the least amount of loss. |
5638 | * The pixel formats from which it chooses one, are determined by the |
5639 | * pix_fmt_list parameter. |
5640 | * |
5641 | * |
5642 | * @param[in] pix_fmt_list AV_PIX_FMT_NONE terminated array of pixel formats to choose from |
5643 | * @param[in] src_pix_fmt source pixel format |
5644 | * @param[in] has_alpha Whether the source pixel format alpha channel is used. |
5645 | * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur. |
5646 | * @return The best pixel format to convert to or -1 if none was found. |
5647 | */ |
5648 | enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list, |
5649 | enum AVPixelFormat src_pix_fmt, |
5650 | int has_alpha, int *loss_ptr); |
5651 | |
5652 | /** |
5653 | * @deprecated see av_find_best_pix_fmt_of_2() |
5654 | */ |
5655 | enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, |
5656 | enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr); |
5657 | |
5658 | attribute_deprecated |
5659 | enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, |
5660 | enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr); |
5661 | |
5662 | enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt); |
5663 | |
5664 | /** |
5665 | * @} |
5666 | */ |
5667 | |
5668 | #if FF_API_SET_DIMENSIONS |
5669 | /** |
5670 | * @deprecated this function is not supposed to be used from outside of lavc |
5671 | */ |
5672 | attribute_deprecated |
5673 | void avcodec_set_dimensions(AVCodecContext *s, int width, int height); |
5674 | #endif |
5675 | |
5676 | #if FF_API_TAG_STRING |
5677 | /** |
5678 | * Put a string representing the codec tag codec_tag in buf. |
5679 | * |
5680 | * @param buf buffer to place codec tag in |
5681 | * @param buf_size size in bytes of buf |
5682 | * @param codec_tag codec tag to assign |
5683 | * @return the length of the string that would have been generated if |
5684 | * enough space had been available, excluding the trailing null |
5685 | * |
5686 | * @deprecated see av_fourcc_make_string() and av_fourcc2str(). |
5687 | */ |
5688 | attribute_deprecated |
5689 | size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag); |
5690 | #endif |
5691 | |
5692 | void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode); |
5693 | |
5694 | /** |
5695 | * Return a name for the specified profile, if available. |
5696 | * |
5697 | * @param codec the codec that is searched for the given profile |
5698 | * @param profile the profile value for which a name is requested |
5699 | * @return A name for the profile if found, NULL otherwise. |
5700 | */ |
5701 | const char *av_get_profile_name(const AVCodec *codec, int profile); |
5702 | |
5703 | /** |
5704 | * Return a name for the specified profile, if available. |
5705 | * |
5706 | * @param codec_id the ID of the codec to which the requested profile belongs |
5707 | * @param profile the profile value for which a name is requested |
5708 | * @return A name for the profile if found, NULL otherwise. |
5709 | * |
5710 | * @note unlike av_get_profile_name(), which searches a list of profiles |
5711 | * supported by a specific decoder or encoder implementation, this |
5712 | * function searches the list of profiles from the AVCodecDescriptor |
5713 | */ |
5714 | const char *avcodec_profile_name(enum AVCodecID codec_id, int profile); |
5715 | |
5716 | int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size); |
5717 | int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count); |
5718 | //FIXME func typedef |
5719 | |
5720 | /** |
5721 | * Fill AVFrame audio data and linesize pointers. |
5722 | * |
5723 | * The buffer buf must be a preallocated buffer with a size big enough |
5724 | * to contain the specified samples amount. The filled AVFrame data |
5725 | * pointers will point to this buffer. |
5726 | * |
5727 | * AVFrame extended_data channel pointers are allocated if necessary for |
5728 | * planar audio. |
5729 | * |
5730 | * @param frame the AVFrame |
5731 | * frame->nb_samples must be set prior to calling the |
5732 | * function. This function fills in frame->data, |
5733 | * frame->extended_data, frame->linesize[0]. |
5734 | * @param nb_channels channel count |
5735 | * @param sample_fmt sample format |
5736 | * @param buf buffer to use for frame data |
5737 | * @param buf_size size of buffer |
5738 | * @param align plane size sample alignment (0 = default) |
5739 | * @return >=0 on success, negative error code on failure |
5740 | * @todo return the size in bytes required to store the samples in |
5741 | * case of success, at the next libavutil bump |
5742 | */ |
5743 | int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels, |
5744 | enum AVSampleFormat sample_fmt, const uint8_t *buf, |
5745 | int buf_size, int align); |
5746 | |
5747 | /** |
5748 | * Reset the internal decoder state / flush internal buffers. Should be called |
5749 | * e.g. when seeking or when switching to a different stream. |
5750 | * |
5751 | * @note when refcounted frames are not used (i.e. avctx->refcounted_frames is 0), |
5752 | * this invalidates the frames previously returned from the decoder. When |
5753 | * refcounted frames are used, the decoder just releases any references it might |
5754 | * keep internally, but the caller's reference remains valid. |
5755 | */ |
5756 | void avcodec_flush_buffers(AVCodecContext *avctx); |
5757 | |
5758 | /** |
5759 | * Return codec bits per sample. |
5760 | * |
5761 | * @param[in] codec_id the codec |
5762 | * @return Number of bits per sample or zero if unknown for the given codec. |
5763 | */ |
5764 | int av_get_bits_per_sample(enum AVCodecID codec_id); |
5765 | |
5766 | /** |
5767 | * Return the PCM codec associated with a sample format. |
5768 | * @param be endianness, 0 for little, 1 for big, |
5769 | * -1 (or anything else) for native |
5770 | * @return AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE |
5771 | */ |
5772 | enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be); |
5773 | |
5774 | /** |
5775 | * Return codec bits per sample. |
5776 | * Only return non-zero if the bits per sample is exactly correct, not an |
5777 | * approximation. |
5778 | * |
5779 | * @param[in] codec_id the codec |
5780 | * @return Number of bits per sample or zero if unknown for the given codec. |
5781 | */ |
5782 | int av_get_exact_bits_per_sample(enum AVCodecID codec_id); |
5783 | |
5784 | /** |
5785 | * Return audio frame duration. |
5786 | * |
5787 | * @param avctx codec context |
5788 | * @param frame_bytes size of the frame, or 0 if unknown |
5789 | * @return frame duration, in samples, if known. 0 if not able to |
5790 | * determine. |
5791 | */ |
5792 | int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes); |
5793 | |
5794 | /** |
5795 | * This function is the same as av_get_audio_frame_duration(), except it works |
5796 | * with AVCodecParameters instead of an AVCodecContext. |
5797 | */ |
5798 | int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes); |
5799 | |
5800 | #if FF_API_OLD_BSF |
5801 | typedef struct AVBitStreamFilterContext { |
5802 | void *priv_data; |
5803 | const struct AVBitStreamFilter *filter; |
5804 | AVCodecParserContext *parser; |
5805 | struct AVBitStreamFilterContext *next; |
5806 | /** |
5807 | * Internal default arguments, used if NULL is passed to av_bitstream_filter_filter(). |
5808 | * Not for access by library users. |
5809 | */ |
5810 | char *args; |
5811 | } AVBitStreamFilterContext; |
5812 | #endif |
5813 | |
5814 | typedef struct AVBSFInternal AVBSFInternal; |
5815 | |
5816 | /** |
5817 | * The bitstream filter state. |
5818 | * |
5819 | * This struct must be allocated with av_bsf_alloc() and freed with |
5820 | * av_bsf_free(). |
5821 | * |
5822 | * The fields in the struct will only be changed (by the caller or by the |
5823 | * filter) as described in their documentation, and are to be considered |
5824 | * immutable otherwise. |
5825 | */ |
5826 | typedef struct AVBSFContext { |
5827 | /** |
5828 | * A class for logging and AVOptions |
5829 | */ |
5830 | const AVClass *av_class; |
5831 | |
5832 | /** |
5833 | * The bitstream filter this context is an instance of. |
5834 | */ |
5835 | const struct AVBitStreamFilter *filter; |
5836 | |
5837 | /** |
5838 | * Opaque libavcodec internal data. Must not be touched by the caller in any |
5839 | * way. |
5840 | */ |
5841 | AVBSFInternal *internal; |
5842 | |
5843 | /** |
5844 | * Opaque filter-specific private data. If filter->priv_class is non-NULL, |
5845 | * this is an AVOptions-enabled struct. |
5846 | */ |
5847 | void *priv_data; |
5848 | |
5849 | /** |
5850 | * Parameters of the input stream. This field is allocated in |
5851 | * av_bsf_alloc(), it needs to be filled by the caller before |
5852 | * av_bsf_init(). |
5853 | */ |
5854 | AVCodecParameters *par_in; |
5855 | |
5856 | /** |
5857 | * Parameters of the output stream. This field is allocated in |
5858 | * av_bsf_alloc(), it is set by the filter in av_bsf_init(). |
5859 | */ |
5860 | AVCodecParameters *par_out; |
5861 | |
5862 | /** |
5863 | * The timebase used for the timestamps of the input packets. Set by the |
5864 | * caller before av_bsf_init(). |
5865 | */ |
5866 | AVRational time_base_in; |
5867 | |
5868 | /** |
5869 | * The timebase used for the timestamps of the output packets. Set by the |
5870 | * filter in av_bsf_init(). |
5871 | */ |
5872 | AVRational time_base_out; |
5873 | } AVBSFContext; |
5874 | |
5875 | typedef struct AVBitStreamFilter { |
5876 | const char *name; |
5877 | |
5878 | /** |
5879 | * A list of codec ids supported by the filter, terminated by |
5880 | * AV_CODEC_ID_NONE. |
5881 | * May be NULL, in that case the bitstream filter works with any codec id. |
5882 | */ |
5883 | const enum AVCodecID *codec_ids; |
5884 | |
5885 | /** |
5886 | * A class for the private data, used to declare bitstream filter private |
5887 | * AVOptions. This field is NULL for bitstream filters that do not declare |
5888 | * any options. |
5889 | * |
5890 | * If this field is non-NULL, the first member of the filter private data |
5891 | * must be a pointer to AVClass, which will be set by libavcodec generic |
5892 | * code to this class. |
5893 | */ |
5894 | const AVClass *priv_class; |
5895 | |
5896 | /***************************************************************** |
5897 | * No fields below this line are part of the public API. They |
5898 | * may not be used outside of libavcodec and can be changed and |
5899 | * removed at will. |
5900 | * New public fields should be added right above. |
5901 | ***************************************************************** |
5902 | */ |
5903 | |
5904 | int priv_data_size; |
5905 | int (*init)(AVBSFContext *ctx); |
5906 | int (*filter)(AVBSFContext *ctx, AVPacket *pkt); |
5907 | void (*close)(AVBSFContext *ctx); |
5908 | } AVBitStreamFilter; |
5909 | |
5910 | #if FF_API_OLD_BSF |
5911 | /** |
5912 | * Register a bitstream filter. |
5913 | * |
5914 | * The filter will be accessible to the application code through |
5915 | * av_bitstream_filter_next() or can be directly initialized with |
5916 | * av_bitstream_filter_init(). |
5917 | * |
5918 | * @see avcodec_register_all() |
5919 | */ |
5920 | attribute_deprecated |
5921 | void av_register_bitstream_filter(AVBitStreamFilter *bsf); |
5922 | |
5923 | /** |
5924 | * Create and initialize a bitstream filter context given a bitstream |
5925 | * filter name. |
5926 | * |
5927 | * The returned context must be freed with av_bitstream_filter_close(). |
5928 | * |
5929 | * @param name the name of the bitstream filter |
5930 | * @return a bitstream filter context if a matching filter was found |
5931 | * and successfully initialized, NULL otherwise |
5932 | */ |
5933 | attribute_deprecated |
5934 | AVBitStreamFilterContext *av_bitstream_filter_init(const char *name); |
5935 | |
5936 | /** |
5937 | * Filter bitstream. |
5938 | * |
5939 | * This function filters the buffer buf with size buf_size, and places the |
5940 | * filtered buffer in the buffer pointed to by poutbuf. |
5941 | * |
5942 | * The output buffer must be freed by the caller. |
5943 | * |
5944 | * @param bsfc bitstream filter context created by av_bitstream_filter_init() |
5945 | * @param avctx AVCodecContext accessed by the filter, may be NULL. |
5946 | * If specified, this must point to the encoder context of the |
5947 | * output stream the packet is sent to. |
5948 | * @param args arguments which specify the filter configuration, may be NULL |
5949 | * @param poutbuf pointer which is updated to point to the filtered buffer |
5950 | * @param poutbuf_size pointer which is updated to the filtered buffer size in bytes |
5951 | * @param buf buffer containing the data to filter |
5952 | * @param buf_size size in bytes of buf |
5953 | * @param keyframe set to non-zero if the buffer to filter corresponds to a key-frame packet data |
5954 | * @return >= 0 in case of success, or a negative error code in case of failure |
5955 | * |
5956 | * If the return value is positive, an output buffer is allocated and |
5957 | * is available in *poutbuf, and is distinct from the input buffer. |
5958 | * |
5959 | * If the return value is 0, the output buffer is not allocated and |
5960 | * should be considered identical to the input buffer, or in case |
5961 | * *poutbuf was set it points to the input buffer (not necessarily to |
5962 | * its starting address). A special case is if *poutbuf was set to NULL and |
5963 | * *poutbuf_size was set to 0, which indicates the packet should be dropped. |
5964 | */ |
5965 | attribute_deprecated |
5966 | int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, |
5967 | AVCodecContext *avctx, const char *args, |
5968 | uint8_t **poutbuf, int *poutbuf_size, |
5969 | const uint8_t *buf, int buf_size, int keyframe); |
5970 | |
5971 | /** |
5972 | * Release bitstream filter context. |
5973 | * |
5974 | * @param bsf the bitstream filter context created with |
5975 | * av_bitstream_filter_init(), can be NULL |
5976 | */ |
5977 | attribute_deprecated |
5978 | void av_bitstream_filter_close(AVBitStreamFilterContext *bsf); |
5979 | |
5980 | /** |
5981 | * If f is NULL, return the first registered bitstream filter, |
5982 | * if f is non-NULL, return the next registered bitstream filter |
5983 | * after f, or NULL if f is the last one. |
5984 | * |
5985 | * This function can be used to iterate over all registered bitstream |
5986 | * filters. |
5987 | */ |
5988 | attribute_deprecated |
5989 | AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f); |
5990 | #endif |
5991 | |
5992 | /** |
5993 | * @return a bitstream filter with the specified name or NULL if no such |
5994 | * bitstream filter exists. |
5995 | */ |
5996 | const AVBitStreamFilter *av_bsf_get_by_name(const char *name); |
5997 | |
5998 | /** |
5999 | * Iterate over all registered bitstream filters. |
6000 | * |
6001 | * @param opaque a pointer where libavcodec will store the iteration state. Must |
6002 | * point to NULL to start the iteration. |
6003 | * |
6004 | * @return the next registered bitstream filter or NULL when the iteration is |
6005 | * finished |
6006 | */ |
6007 | const AVBitStreamFilter *av_bsf_next(void **opaque); |
6008 | |
6009 | /** |
6010 | * Allocate a context for a given bitstream filter. The caller must fill in the |
6011 | * context parameters as described in the documentation and then call |
6012 | * av_bsf_init() before sending any data to the filter. |
6013 | * |
6014 | * @param filter the filter for which to allocate an instance. |
6015 | * @param ctx a pointer into which the pointer to the newly-allocated context |
6016 | * will be written. It must be freed with av_bsf_free() after the |
6017 | * filtering is done. |
6018 | * |
6019 | * @return 0 on success, a negative AVERROR code on failure |
6020 | */ |
6021 | int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **ctx); |
6022 | |
6023 | /** |
6024 | * Prepare the filter for use, after all the parameters and options have been |
6025 | * set. |
6026 | */ |
6027 | int av_bsf_init(AVBSFContext *ctx); |
6028 | |
6029 | /** |
6030 | * Submit a packet for filtering. |
6031 | * |
6032 | * After sending each packet, the filter must be completely drained by calling |
6033 | * av_bsf_receive_packet() repeatedly until it returns AVERROR(EAGAIN) or |
6034 | * AVERROR_EOF. |
6035 | * |
6036 | * @param pkt the packet to filter. pkt must contain some payload (i.e data or |
6037 | * side data must be present in pkt). The bitstream filter will take ownership of |
6038 | * the packet and reset the contents of pkt. pkt is not touched if an error occurs. |
6039 | * This parameter may be NULL, which signals the end of the stream (i.e. no more |
6040 | * packets will be sent). That will cause the filter to output any packets it |
6041 | * may have buffered internally. |
6042 | * |
6043 | * @return 0 on success, a negative AVERROR on error. |
6044 | */ |
6045 | int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt); |
6046 | |
6047 | /** |
6048 | * Retrieve a filtered packet. |
6049 | * |
6050 | * @param[out] pkt this struct will be filled with the contents of the filtered |
6051 | * packet. It is owned by the caller and must be freed using |
6052 | * av_packet_unref() when it is no longer needed. |
6053 | * This parameter should be "clean" (i.e. freshly allocated |
6054 | * with av_packet_alloc() or unreffed with av_packet_unref()) |
6055 | * when this function is called. If this function returns |
6056 | * successfully, the contents of pkt will be completely |
6057 | * overwritten by the returned data. On failure, pkt is not |
6058 | * touched. |
6059 | * |
6060 | * @return 0 on success. AVERROR(EAGAIN) if more packets need to be sent to the |
6061 | * filter (using av_bsf_send_packet()) to get more output. AVERROR_EOF if there |
6062 | * will be no further output from the filter. Another negative AVERROR value if |
6063 | * an error occurs. |
6064 | * |
6065 | * @note one input packet may result in several output packets, so after sending |
6066 | * a packet with av_bsf_send_packet(), this function needs to be called |
6067 | * repeatedly until it stops returning 0. It is also possible for a filter to |
6068 | * output fewer packets than were sent to it, so this function may return |
6069 | * AVERROR(EAGAIN) immediately after a successful av_bsf_send_packet() call. |
6070 | */ |
6071 | int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt); |
6072 | |
6073 | /** |
6074 | * Free a bitstream filter context and everything associated with it; write NULL |
6075 | * into the supplied pointer. |
6076 | */ |
6077 | void av_bsf_free(AVBSFContext **ctx); |
6078 | |
6079 | /** |
6080 | * Get the AVClass for AVBSFContext. It can be used in combination with |
6081 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. |
6082 | * |
6083 | * @see av_opt_find(). |
6084 | */ |
6085 | const AVClass *av_bsf_get_class(void); |
6086 | |
6087 | /** |
6088 | * Structure for chain/list of bitstream filters. |
6089 | * Empty list can be allocated by av_bsf_list_alloc(). |
6090 | */ |
6091 | typedef struct AVBSFList AVBSFList; |
6092 | |
6093 | /** |
6094 | * Allocate empty list of bitstream filters. |
6095 | * The list must be later freed by av_bsf_list_free() |
6096 | * or finalized by av_bsf_list_finalize(). |
6097 | * |
6098 | * @return Pointer to @ref AVBSFList on success, NULL in case of failure |
6099 | */ |
6100 | AVBSFList *av_bsf_list_alloc(void); |
6101 | |
6102 | /** |
6103 | * Free list of bitstream filters. |
6104 | * |
6105 | * @param lst Pointer to pointer returned by av_bsf_list_alloc() |
6106 | */ |
6107 | void av_bsf_list_free(AVBSFList **lst); |
6108 | |
6109 | /** |
6110 | * Append bitstream filter to the list of bitstream filters. |
6111 | * |
6112 | * @param lst List to append to |
6113 | * @param bsf Filter context to be appended |
6114 | * |
6115 | * @return >=0 on success, negative AVERROR in case of failure |
6116 | */ |
6117 | int av_bsf_list_append(AVBSFList *lst, AVBSFContext *bsf); |
6118 | |
6119 | /** |
6120 | * Construct new bitstream filter context given it's name and options |
6121 | * and append it to the list of bitstream filters. |
6122 | * |
6123 | * @param lst List to append to |
6124 | * @param bsf_name Name of the bitstream filter |
6125 | * @param options Options for the bitstream filter, can be set to NULL |
6126 | * |
6127 | * @return >=0 on success, negative AVERROR in case of failure |
6128 | */ |
6129 | int av_bsf_list_append2(AVBSFList *lst, const char * bsf_name, AVDictionary **options); |
6130 | /** |
6131 | * Finalize list of bitstream filters. |
6132 | * |
6133 | * This function will transform @ref AVBSFList to single @ref AVBSFContext, |
6134 | * so the whole chain of bitstream filters can be treated as single filter |
6135 | * freshly allocated by av_bsf_alloc(). |
6136 | * If the call is successful, @ref AVBSFList structure is freed and lst |
6137 | * will be set to NULL. In case of failure, caller is responsible for |
6138 | * freeing the structure by av_bsf_list_free() |
6139 | * |
6140 | * @param lst Filter list structure to be transformed |
6141 | * @param[out] bsf Pointer to be set to newly created @ref AVBSFContext structure |
6142 | * representing the chain of bitstream filters |
6143 | * |
6144 | * @return >=0 on success, negative AVERROR in case of failure |
6145 | */ |
6146 | int av_bsf_list_finalize(AVBSFList **lst, AVBSFContext **bsf); |
6147 | |
6148 | /** |
6149 | * Parse string describing list of bitstream filters and create single |
6150 | * @ref AVBSFContext describing the whole chain of bitstream filters. |
6151 | * Resulting @ref AVBSFContext can be treated as any other @ref AVBSFContext freshly |
6152 | * allocated by av_bsf_alloc(). |
6153 | * |
6154 | * @param str String describing chain of bitstream filters in format |
6155 | * `bsf1[=opt1=val1:opt2=val2][,bsf2]` |
6156 | * @param[out] bsf Pointer to be set to newly created @ref AVBSFContext structure |
6157 | * representing the chain of bitstream filters |
6158 | * |
6159 | * @return >=0 on success, negative AVERROR in case of failure |
6160 | */ |
6161 | int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf); |
6162 | |
6163 | /** |
6164 | * Get null/pass-through bitstream filter. |
6165 | * |
6166 | * @param[out] bsf Pointer to be set to new instance of pass-through bitstream filter |
6167 | * |
6168 | * @return |
6169 | */ |
6170 | int av_bsf_get_null_filter(AVBSFContext **bsf); |
6171 | |
6172 | /* memory */ |
6173 | |
6174 | /** |
6175 | * Same behaviour av_fast_malloc but the buffer has additional |
6176 | * AV_INPUT_BUFFER_PADDING_SIZE at the end which will always be 0. |
6177 | * |
6178 | * In addition the whole buffer will initially and after resizes |
6179 | * be 0-initialized so that no uninitialized data will ever appear. |
6180 | */ |
6181 | void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size); |
6182 | |
6183 | /** |
6184 | * Same behaviour av_fast_padded_malloc except that buffer will always |
6185 | * be 0-initialized after call. |
6186 | */ |
6187 | void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size); |
6188 | |
6189 | /** |
6190 | * Encode extradata length to a buffer. Used by xiph codecs. |
6191 | * |
6192 | * @param s buffer to write to; must be at least (v/255+1) bytes long |
6193 | * @param v size of extradata in bytes |
6194 | * @return number of bytes written to the buffer. |
6195 | */ |
6196 | unsigned int av_xiphlacing(unsigned char *s, unsigned int v); |
6197 | |
6198 | #if FF_API_MISSING_SAMPLE |
6199 | /** |
6200 | * Log a generic warning message about a missing feature. This function is |
6201 | * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) |
6202 | * only, and would normally not be used by applications. |
6203 | * @param[in] avc a pointer to an arbitrary struct of which the first field is |
6204 | * a pointer to an AVClass struct |
6205 | * @param[in] feature string containing the name of the missing feature |
6206 | * @param[in] want_sample indicates if samples are wanted which exhibit this feature. |
6207 | * If want_sample is non-zero, additional verbiage will be added to the log |
6208 | * message which tells the user how to report samples to the development |
6209 | * mailing list. |
6210 | * @deprecated Use avpriv_report_missing_feature() instead. |
6211 | */ |
6212 | attribute_deprecated |
6213 | void av_log_missing_feature(void *avc, const char *feature, int want_sample); |
6214 | |
6215 | /** |
6216 | * Log a generic warning message asking for a sample. This function is |
6217 | * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) |
6218 | * only, and would normally not be used by applications. |
6219 | * @param[in] avc a pointer to an arbitrary struct of which the first field is |
6220 | * a pointer to an AVClass struct |
6221 | * @param[in] msg string containing an optional message, or NULL if no message |
6222 | * @deprecated Use avpriv_request_sample() instead. |
6223 | */ |
6224 | attribute_deprecated |
6225 | void av_log_ask_for_sample(void *avc, const char *msg, ...) av_printf_format(2, 3); |
6226 | #endif /* FF_API_MISSING_SAMPLE */ |
6227 | |
6228 | /** |
6229 | * Register the hardware accelerator hwaccel. |
6230 | */ |
6231 | void av_register_hwaccel(AVHWAccel *hwaccel); |
6232 | |
6233 | /** |
6234 | * If hwaccel is NULL, returns the first registered hardware accelerator, |
6235 | * if hwaccel is non-NULL, returns the next registered hardware accelerator |
6236 | * after hwaccel, or NULL if hwaccel is the last one. |
6237 | */ |
6238 | AVHWAccel *av_hwaccel_next(const AVHWAccel *hwaccel); |
6239 | |
6240 | |
6241 | /** |
6242 | * Lock operation used by lockmgr |
6243 | */ |
6244 | enum AVLockOp { |
6245 | AV_LOCK_CREATE, ///< Create a mutex |
6246 | AV_LOCK_OBTAIN, ///< Lock the mutex |
6247 | AV_LOCK_RELEASE, ///< Unlock the mutex |
6248 | AV_LOCK_DESTROY, ///< Free mutex resources |
6249 | }; |
6250 | |
6251 | /** |
6252 | * Register a user provided lock manager supporting the operations |
6253 | * specified by AVLockOp. The "mutex" argument to the function points |
6254 | * to a (void *) where the lockmgr should store/get a pointer to a user |
6255 | * allocated mutex. It is NULL upon AV_LOCK_CREATE and equal to the |
6256 | * value left by the last call for all other ops. If the lock manager is |
6257 | * unable to perform the op then it should leave the mutex in the same |
6258 | * state as when it was called and return a non-zero value. However, |
6259 | * when called with AV_LOCK_DESTROY the mutex will always be assumed to |
6260 | * have been successfully destroyed. If av_lockmgr_register succeeds |
6261 | * it will return a non-negative value, if it fails it will return a |
6262 | * negative value and destroy all mutex and unregister all callbacks. |
6263 | * av_lockmgr_register is not thread-safe, it must be called from a |
6264 | * single thread before any calls which make use of locking are used. |
6265 | * |
6266 | * @param cb User defined callback. av_lockmgr_register invokes calls |
6267 | * to this callback and the previously registered callback. |
6268 | * The callback will be used to create more than one mutex |
6269 | * each of which must be backed by its own underlying locking |
6270 | * mechanism (i.e. do not use a single static object to |
6271 | * implement your lock manager). If cb is set to NULL the |
6272 | * lockmgr will be unregistered. |
6273 | */ |
6274 | int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op)); |
6275 | |
6276 | /** |
6277 | * Get the type of the given codec. |
6278 | */ |
6279 | enum AVMediaType avcodec_get_type(enum AVCodecID codec_id); |
6280 | |
6281 | /** |
6282 | * Get the name of a codec. |
6283 | * @return a static string identifying the codec; never NULL |
6284 | */ |
6285 | const char *avcodec_get_name(enum AVCodecID id); |
6286 | |
6287 | /** |
6288 | * @return a positive value if s is open (i.e. avcodec_open2() was called on it |
6289 | * with no corresponding avcodec_close()), 0 otherwise. |
6290 | */ |
6291 | int avcodec_is_open(AVCodecContext *s); |
6292 | |
6293 | /** |
6294 | * @return a non-zero number if codec is an encoder, zero otherwise |
6295 | */ |
6296 | int av_codec_is_encoder(const AVCodec *codec); |
6297 | |
6298 | /** |
6299 | * @return a non-zero number if codec is a decoder, zero otherwise |
6300 | */ |
6301 | int av_codec_is_decoder(const AVCodec *codec); |
6302 | |
6303 | /** |
6304 | * @return descriptor for given codec ID or NULL if no descriptor exists. |
6305 | */ |
6306 | const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id); |
6307 | |
6308 | /** |
6309 | * Iterate over all codec descriptors known to libavcodec. |
6310 | * |
6311 | * @param prev previous descriptor. NULL to get the first descriptor. |
6312 | * |
6313 | * @return next descriptor or NULL after the last descriptor |
6314 | */ |
6315 | const AVCodecDescriptor *avcodec_descriptor_next(const AVCodecDescriptor *prev); |
6316 | |
6317 | /** |
6318 | * @return codec descriptor with the given name or NULL if no such descriptor |
6319 | * exists. |
6320 | */ |
6321 | const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name); |
6322 | |
6323 | /** |
6324 | * Allocate a CPB properties structure and initialize its fields to default |
6325 | * values. |
6326 | * |
6327 | * @param size if non-NULL, the size of the allocated struct will be written |
6328 | * here. This is useful for embedding it in side data. |
6329 | * |
6330 | * @return the newly allocated struct or NULL on failure |
6331 | */ |
6332 | AVCPBProperties *av_cpb_properties_alloc(size_t *size); |
6333 | |
6334 | /** |
6335 | * @} |
6336 | */ |
6337 | |
6338 | #endif /* AVCODEC_AVCODEC_H */ |
6339 |