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path: root/libavcodec/libx265.c (plain)
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1/*
2 * libx265 encoder
3 *
4 * Copyright (c) 2013-2014 Derek Buitenhuis
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#if defined(_MSC_VER)
24#define X265_API_IMPORTS 1
25#endif
26
27#include <x265.h>
28#include <float.h>
29
30#include "libavutil/internal.h"
31#include "libavutil/common.h"
32#include "libavutil/opt.h"
33#include "libavutil/pixdesc.h"
34#include "avcodec.h"
35#include "internal.h"
36
37typedef struct libx265Context {
38 const AVClass *class;
39
40 x265_encoder *encoder;
41 x265_param *params;
42 const x265_api *api;
43
44 float crf;
45 int forced_idr;
46 char *preset;
47 char *tune;
48 char *x265_opts;
49} libx265Context;
50
51static int is_keyframe(NalUnitType naltype)
52{
53 switch (naltype) {
54 case NAL_UNIT_CODED_SLICE_BLA_W_LP:
55 case NAL_UNIT_CODED_SLICE_BLA_W_RADL:
56 case NAL_UNIT_CODED_SLICE_BLA_N_LP:
57 case NAL_UNIT_CODED_SLICE_IDR_W_RADL:
58 case NAL_UNIT_CODED_SLICE_IDR_N_LP:
59 case NAL_UNIT_CODED_SLICE_CRA:
60 return 1;
61 default:
62 return 0;
63 }
64}
65
66static av_cold int libx265_encode_close(AVCodecContext *avctx)
67{
68 libx265Context *ctx = avctx->priv_data;
69
70 ctx->api->param_free(ctx->params);
71
72 if (ctx->encoder)
73 ctx->api->encoder_close(ctx->encoder);
74
75 return 0;
76}
77
78static av_cold int libx265_encode_init(AVCodecContext *avctx)
79{
80 libx265Context *ctx = avctx->priv_data;
81
82 ctx->api = x265_api_get(av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth);
83 if (!ctx->api)
84 ctx->api = x265_api_get(0);
85
86 ctx->params = ctx->api->param_alloc();
87 if (!ctx->params) {
88 av_log(avctx, AV_LOG_ERROR, "Could not allocate x265 param structure.\n");
89 return AVERROR(ENOMEM);
90 }
91
92 if (ctx->api->param_default_preset(ctx->params, ctx->preset, ctx->tune) < 0) {
93 int i;
94
95 av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", ctx->preset, ctx->tune);
96 av_log(avctx, AV_LOG_INFO, "Possible presets:");
97 for (i = 0; x265_preset_names[i]; i++)
98 av_log(avctx, AV_LOG_INFO, " %s", x265_preset_names[i]);
99
100 av_log(avctx, AV_LOG_INFO, "\n");
101 av_log(avctx, AV_LOG_INFO, "Possible tunes:");
102 for (i = 0; x265_tune_names[i]; i++)
103 av_log(avctx, AV_LOG_INFO, " %s", x265_tune_names[i]);
104
105 av_log(avctx, AV_LOG_INFO, "\n");
106
107 return AVERROR(EINVAL);
108 }
109
110 ctx->params->frameNumThreads = avctx->thread_count;
111 ctx->params->fpsNum = avctx->time_base.den;
112 ctx->params->fpsDenom = avctx->time_base.num * avctx->ticks_per_frame;
113 ctx->params->sourceWidth = avctx->width;
114 ctx->params->sourceHeight = avctx->height;
115 ctx->params->bEnablePsnr = !!(avctx->flags & AV_CODEC_FLAG_PSNR);
116
117 if ((avctx->color_primaries <= AVCOL_PRI_BT2020 &&
118 avctx->color_primaries != AVCOL_PRI_UNSPECIFIED) ||
119 (avctx->color_trc <= AVCOL_TRC_BT2020_12 &&
120 avctx->color_trc != AVCOL_TRC_UNSPECIFIED) ||
121 (avctx->colorspace <= AVCOL_SPC_BT2020_CL &&
122 avctx->colorspace != AVCOL_SPC_UNSPECIFIED)) {
123
124 ctx->params->vui.bEnableVideoSignalTypePresentFlag = 1;
125 ctx->params->vui.bEnableColorDescriptionPresentFlag = 1;
126
127 // x265 validates the parameters internally
128 ctx->params->vui.colorPrimaries = avctx->color_primaries;
129 ctx->params->vui.transferCharacteristics = avctx->color_trc;
130 ctx->params->vui.matrixCoeffs = avctx->colorspace;
131 }
132
133 if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
134 char sar[12];
135 int sar_num, sar_den;
136
137 av_reduce(&sar_num, &sar_den,
138 avctx->sample_aspect_ratio.num,
139 avctx->sample_aspect_ratio.den, 65535);
140 snprintf(sar, sizeof(sar), "%d:%d", sar_num, sar_den);
141 if (ctx->api->param_parse(ctx->params, "sar", sar) == X265_PARAM_BAD_VALUE) {
142 av_log(avctx, AV_LOG_ERROR, "Invalid SAR: %d:%d.\n", sar_num, sar_den);
143 return AVERROR_INVALIDDATA;
144 }
145 }
146
147 switch (avctx->pix_fmt) {
148 case AV_PIX_FMT_YUV420P:
149 case AV_PIX_FMT_YUV420P10:
150 case AV_PIX_FMT_YUV420P12:
151 ctx->params->internalCsp = X265_CSP_I420;
152 break;
153 case AV_PIX_FMT_YUV422P:
154 case AV_PIX_FMT_YUV422P10:
155 case AV_PIX_FMT_YUV422P12:
156 ctx->params->internalCsp = X265_CSP_I422;
157 break;
158 case AV_PIX_FMT_GBRP:
159 case AV_PIX_FMT_GBRP10:
160 case AV_PIX_FMT_GBRP12:
161 ctx->params->vui.matrixCoeffs = AVCOL_SPC_RGB;
162 ctx->params->vui.bEnableVideoSignalTypePresentFlag = 1;
163 ctx->params->vui.bEnableColorDescriptionPresentFlag = 1;
164 case AV_PIX_FMT_YUV444P:
165 case AV_PIX_FMT_YUV444P10:
166 case AV_PIX_FMT_YUV444P12:
167 ctx->params->internalCsp = X265_CSP_I444;
168 break;
169 case AV_PIX_FMT_GRAY8:
170 case AV_PIX_FMT_GRAY10:
171 case AV_PIX_FMT_GRAY12:
172 if (ctx->api->api_build_number < 85) {
173 av_log(avctx, AV_LOG_ERROR,
174 "libx265 version is %d, must be at least 85 for gray encoding.\n",
175 ctx->api->api_build_number);
176 return AVERROR_INVALIDDATA;
177 }
178 ctx->params->internalCsp = X265_CSP_I400;
179 break;
180 }
181
182 if (ctx->crf >= 0) {
183 char crf[6];
184
185 snprintf(crf, sizeof(crf), "%2.2f", ctx->crf);
186 if (ctx->api->param_parse(ctx->params, "crf", crf) == X265_PARAM_BAD_VALUE) {
187 av_log(avctx, AV_LOG_ERROR, "Invalid crf: %2.2f.\n", ctx->crf);
188 return AVERROR(EINVAL);
189 }
190 } else if (avctx->bit_rate > 0) {
191 ctx->params->rc.bitrate = avctx->bit_rate / 1000;
192 ctx->params->rc.rateControlMode = X265_RC_ABR;
193 }
194
195 if (!(avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER))
196 ctx->params->bRepeatHeaders = 1;
197
198 if (ctx->x265_opts) {
199 AVDictionary *dict = NULL;
200 AVDictionaryEntry *en = NULL;
201
202 if (!av_dict_parse_string(&dict, ctx->x265_opts, "=", ":", 0)) {
203 while ((en = av_dict_get(dict, "", en, AV_DICT_IGNORE_SUFFIX))) {
204 int parse_ret = ctx->api->param_parse(ctx->params, en->key, en->value);
205
206 switch (parse_ret) {
207 case X265_PARAM_BAD_NAME:
208 av_log(avctx, AV_LOG_WARNING,
209 "Unknown option: %s.\n", en->key);
210 break;
211 case X265_PARAM_BAD_VALUE:
212 av_log(avctx, AV_LOG_WARNING,
213 "Invalid value for %s: %s.\n", en->key, en->value);
214 break;
215 default:
216 break;
217 }
218 }
219 av_dict_free(&dict);
220 }
221 }
222
223 ctx->encoder = ctx->api->encoder_open(ctx->params);
224 if (!ctx->encoder) {
225 av_log(avctx, AV_LOG_ERROR, "Cannot open libx265 encoder.\n");
226 libx265_encode_close(avctx);
227 return AVERROR_INVALIDDATA;
228 }
229
230 if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
231 x265_nal *nal;
232 int nnal;
233
234 avctx->extradata_size = ctx->api->encoder_headers(ctx->encoder, &nal, &nnal);
235 if (avctx->extradata_size <= 0) {
236 av_log(avctx, AV_LOG_ERROR, "Cannot encode headers.\n");
237 libx265_encode_close(avctx);
238 return AVERROR_INVALIDDATA;
239 }
240
241 avctx->extradata = av_malloc(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
242 if (!avctx->extradata) {
243 av_log(avctx, AV_LOG_ERROR,
244 "Cannot allocate HEVC header of size %d.\n", avctx->extradata_size);
245 libx265_encode_close(avctx);
246 return AVERROR(ENOMEM);
247 }
248
249 memcpy(avctx->extradata, nal[0].payload, avctx->extradata_size);
250 }
251
252 return 0;
253}
254
255static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
256 const AVFrame *pic, int *got_packet)
257{
258 libx265Context *ctx = avctx->priv_data;
259 x265_picture x265pic;
260 x265_picture x265pic_out = { 0 };
261 x265_nal *nal;
262 uint8_t *dst;
263 int payload = 0;
264 int nnal;
265 int ret;
266 int i;
267
268 ctx->api->picture_init(ctx->params, &x265pic);
269
270 if (pic) {
271 for (i = 0; i < 3; i++) {
272 x265pic.planes[i] = pic->data[i];
273 x265pic.stride[i] = pic->linesize[i];
274 }
275
276 x265pic.pts = pic->pts;
277 x265pic.bitDepth = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth;
278
279 x265pic.sliceType = pic->pict_type == AV_PICTURE_TYPE_I ?
280 (ctx->forced_idr ? X265_TYPE_IDR : X265_TYPE_I) :
281 pic->pict_type == AV_PICTURE_TYPE_P ? X265_TYPE_P :
282 pic->pict_type == AV_PICTURE_TYPE_B ? X265_TYPE_B :
283 X265_TYPE_AUTO;
284 }
285
286 ret = ctx->api->encoder_encode(ctx->encoder, &nal, &nnal,
287 pic ? &x265pic : NULL, &x265pic_out);
288 if (ret < 0)
289 return AVERROR_EXTERNAL;
290
291 if (!nnal)
292 return 0;
293
294 for (i = 0; i < nnal; i++)
295 payload += nal[i].sizeBytes;
296
297 ret = ff_alloc_packet(pkt, payload);
298 if (ret < 0) {
299 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
300 return ret;
301 }
302 dst = pkt->data;
303
304 for (i = 0; i < nnal; i++) {
305 memcpy(dst, nal[i].payload, nal[i].sizeBytes);
306 dst += nal[i].sizeBytes;
307
308 if (is_keyframe(nal[i].type))
309 pkt->flags |= AV_PKT_FLAG_KEY;
310 }
311
312 pkt->pts = x265pic_out.pts;
313 pkt->dts = x265pic_out.dts;
314
315#if FF_API_CODED_FRAME
316FF_DISABLE_DEPRECATION_WARNINGS
317 switch (x265pic_out.sliceType) {
318 case X265_TYPE_IDR:
319 case X265_TYPE_I:
320 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
321 break;
322 case X265_TYPE_P:
323 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_P;
324 break;
325 case X265_TYPE_B:
326 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_B;
327 break;
328 }
329FF_ENABLE_DEPRECATION_WARNINGS
330#endif
331
332 *got_packet = 1;
333 return 0;
334}
335
336static const enum AVPixelFormat x265_csp_eight[] = {
337 AV_PIX_FMT_YUV420P,
338 AV_PIX_FMT_YUV422P,
339 AV_PIX_FMT_YUV444P,
340 AV_PIX_FMT_GBRP,
341 AV_PIX_FMT_GRAY8,
342 AV_PIX_FMT_NONE
343};
344
345static const enum AVPixelFormat x265_csp_ten[] = {
346 AV_PIX_FMT_YUV420P,
347 AV_PIX_FMT_YUV422P,
348 AV_PIX_FMT_YUV444P,
349 AV_PIX_FMT_GBRP,
350 AV_PIX_FMT_YUV420P10,
351 AV_PIX_FMT_YUV422P10,
352 AV_PIX_FMT_YUV444P10,
353 AV_PIX_FMT_GBRP10,
354 AV_PIX_FMT_GRAY8,
355 AV_PIX_FMT_GRAY10,
356 AV_PIX_FMT_NONE
357};
358
359static const enum AVPixelFormat x265_csp_twelve[] = {
360 AV_PIX_FMT_YUV420P,
361 AV_PIX_FMT_YUV422P,
362 AV_PIX_FMT_YUV444P,
363 AV_PIX_FMT_GBRP,
364 AV_PIX_FMT_YUV420P10,
365 AV_PIX_FMT_YUV422P10,
366 AV_PIX_FMT_YUV444P10,
367 AV_PIX_FMT_GBRP10,
368 AV_PIX_FMT_YUV420P12,
369 AV_PIX_FMT_YUV422P12,
370 AV_PIX_FMT_YUV444P12,
371 AV_PIX_FMT_GBRP12,
372 AV_PIX_FMT_GRAY8,
373 AV_PIX_FMT_GRAY10,
374 AV_PIX_FMT_GRAY12,
375 AV_PIX_FMT_NONE
376};
377
378static av_cold void libx265_encode_init_csp(AVCodec *codec)
379{
380 if (x265_api_get(12))
381 codec->pix_fmts = x265_csp_twelve;
382 else if (x265_api_get(10))
383 codec->pix_fmts = x265_csp_ten;
384 else if (x265_api_get(8))
385 codec->pix_fmts = x265_csp_eight;
386}
387
388#define OFFSET(x) offsetof(libx265Context, x)
389#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
390static const AVOption options[] = {
391 { "crf", "set the x265 crf", OFFSET(crf), AV_OPT_TYPE_FLOAT, { .dbl = -1 }, -1, FLT_MAX, VE },
392 { "forced-idr", "if forcing keyframes, force them as IDR frames", OFFSET(forced_idr),AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
393 { "preset", "set the x265 preset", OFFSET(preset), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
394 { "tune", "set the x265 tune parameter", OFFSET(tune), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
395 { "x265-params", "set the x265 configuration using a :-separated list of key=value parameters", OFFSET(x265_opts), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
396 { NULL }
397};
398
399static const AVClass class = {
400 .class_name = "libx265",
401 .item_name = av_default_item_name,
402 .option = options,
403 .version = LIBAVUTIL_VERSION_INT,
404};
405
406static const AVCodecDefault x265_defaults[] = {
407 { "b", "0" },
408 { NULL },
409};
410
411AVCodec ff_libx265_encoder = {
412 .name = "libx265",
413 .long_name = NULL_IF_CONFIG_SMALL("libx265 H.265 / HEVC"),
414 .type = AVMEDIA_TYPE_VIDEO,
415 .id = AV_CODEC_ID_HEVC,
416 .init = libx265_encode_init,
417 .init_static_data = libx265_encode_init_csp,
418 .encode2 = libx265_encode_frame,
419 .close = libx265_encode_close,
420 .priv_data_size = sizeof(libx265Context),
421 .priv_class = &class,
422 .defaults = x265_defaults,
423 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
424};
425
generated by cgit at 2024-05-17 20:22:54 (GMT)