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path: root/libavcodec/libxvid.c (plain)
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1/*
2 * Interface to xvidcore for MPEG-4 encoding
3 * Copyright (c) 2004 Adam Thayer <krevnik@comcast.net>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * @file
24 * Interface to xvidcore for MPEG-4 compliant encoding.
25 * @author Adam Thayer (krevnik@comcast.net)
26 */
27
28#include <stdio.h>
29#include <string.h>
30#include <xvid.h>
31
32#include "libavutil/avassert.h"
33#include "libavutil/cpu.h"
34#include "libavutil/file.h"
35#include "libavutil/internal.h"
36#include "libavutil/intreadwrite.h"
37#include "libavutil/mathematics.h"
38#include "libavutil/mem.h"
39#include "libavutil/opt.h"
40
41#include "avcodec.h"
42#include "internal.h"
43#include "libxvid.h"
44#include "mpegutils.h"
45
46#if HAVE_UNISTD_H
47#include <unistd.h>
48#endif
49
50#if HAVE_IO_H
51#include <io.h>
52#endif
53
54/**
55 * Buffer management macros.
56 */
57#define BUFFER_SIZE 1024
58#define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
59#define BUFFER_CAT(x) (&((x)[strlen(x)]))
60
61/**
62 * Structure for the private Xvid context.
63 * This stores all the private context for the codec.
64 */
65struct xvid_context {
66 AVClass *class;
67 void *encoder_handle; /**< Handle for Xvid encoder */
68 int xsize; /**< Frame x size */
69 int ysize; /**< Frame y size */
70 int vop_flags; /**< VOP flags for Xvid encoder */
71 int vol_flags; /**< VOL flags for Xvid encoder */
72 int me_flags; /**< Motion Estimation flags */
73 int qscale; /**< Do we use constant scale? */
74 int quicktime_format; /**< Are we in a QT-based format? */
75 char *twopassbuffer; /**< Character buffer for two-pass */
76 char *old_twopassbuffer; /**< Old character buffer (two-pass) */
77 char *twopassfile; /**< second pass temp file name */
78 int twopassfd;
79 unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
80 unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
81 int lumi_aq; /**< Lumi masking as an aq method */
82 int variance_aq; /**< Variance adaptive quantization */
83 int ssim; /**< SSIM information display mode */
84 int ssim_acc; /**< SSIM accuracy. 0: accurate. 4: fast. */
85 int gmc;
86 int me_quality; /**< Motion estimation quality. 0: fast 6: best. */
87 int mpeg_quant; /**< Quantization type. 0: H.263, 1: MPEG */
88};
89
90/**
91 * Structure for the private first-pass plugin.
92 */
93struct xvid_ff_pass1 {
94 int version; /**< Xvid version */
95 struct xvid_context *context; /**< Pointer to private context */
96};
97
98static int xvid_encode_close(AVCodecContext *avctx);
99static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
100 const AVFrame *picture, int *got_packet);
101
102
103/*
104 * Xvid 2-Pass Kludge Section
105 *
106 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
107 * this section spends time replacing the first pass plugin so we can write
108 * statistic information as libavcodec requests in. We have another kludge
109 * that allows us to pass data to the second pass in Xvid without a custom
110 * rate-control plugin.
111 */
112
113/**
114 * Initialize the two-pass plugin and context.
115 *
116 * @param param Input construction parameter structure
117 * @param handle Private context handle
118 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
119 */
120static int xvid_ff_2pass_create(xvid_plg_create_t *param, void **handle)
121{
122 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *) param->param;
123 char *log = x->context->twopassbuffer;
124
125 /* Do a quick bounds check */
126 if (!log)
127 return XVID_ERR_FAIL;
128
129 /* We use snprintf() */
130 /* This is because we can safely prevent a buffer overflow */
131 log[0] = 0;
132 snprintf(log, BUFFER_REMAINING(log),
133 "# ffmpeg 2-pass log file, using xvid codec\n");
134 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
135 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
136 XVID_VERSION_MAJOR(XVID_VERSION),
137 XVID_VERSION_MINOR(XVID_VERSION),
138 XVID_VERSION_PATCH(XVID_VERSION));
139
140 *handle = x->context;
141 return 0;
142}
143
144/**
145 * Destroy the two-pass plugin context.
146 *
147 * @param ref Context pointer for the plugin
148 * @param param Destroy context
149 * @return Returns 0, success guaranteed
150 */
151static int xvid_ff_2pass_destroy(struct xvid_context *ref,
152 xvid_plg_destroy_t *param)
153{
154 /* Currently cannot think of anything to do on destruction */
155 /* Still, the framework should be here for reference/use */
156 if (ref->twopassbuffer)
157 ref->twopassbuffer[0] = 0;
158 return 0;
159}
160
161/**
162 * Enable fast encode mode during the first pass.
163 *
164 * @param ref Context pointer for the plugin
165 * @param param Frame data
166 * @return Returns 0, success guaranteed
167 */
168static int xvid_ff_2pass_before(struct xvid_context *ref,
169 xvid_plg_data_t *param)
170{
171 int motion_remove;
172 int motion_replacements;
173 int vop_remove;
174
175 /* Nothing to do here, result is changed too much */
176 if (param->zone && param->zone->mode == XVID_ZONE_QUANT)
177 return 0;
178
179 /* We can implement a 'turbo' first pass mode here */
180 param->quant = 2;
181
182 /* Init values */
183 motion_remove = ~XVID_ME_CHROMA_PVOP &
184 ~XVID_ME_CHROMA_BVOP &
185 ~XVID_ME_EXTSEARCH16 &
186 ~XVID_ME_ADVANCEDDIAMOND16;
187 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
188 XVID_ME_SKIP_DELTASEARCH |
189 XVID_ME_FASTREFINE16 |
190 XVID_ME_BFRAME_EARLYSTOP;
191 vop_remove = ~XVID_VOP_MODEDECISION_RD &
192 ~XVID_VOP_FAST_MODEDECISION_RD &
193 ~XVID_VOP_TRELLISQUANT &
194 ~XVID_VOP_INTER4V &
195 ~XVID_VOP_HQACPRED;
196
197 param->vol_flags &= ~XVID_VOL_GMC;
198 param->vop_flags &= vop_remove;
199 param->motion_flags &= motion_remove;
200 param->motion_flags |= motion_replacements;
201
202 return 0;
203}
204
205/**
206 * Capture statistic data and write it during first pass.
207 *
208 * @param ref Context pointer for the plugin
209 * @param param Statistic data
210 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
211 */
212static int xvid_ff_2pass_after(struct xvid_context *ref,
213 xvid_plg_data_t *param)
214{
215 char *log = ref->twopassbuffer;
216 const char *frame_types = " ipbs";
217 char frame_type;
218
219 /* Quick bounds check */
220 if (!log)
221 return XVID_ERR_FAIL;
222
223 /* Convert the type given to us into a character */
224 if (param->type < 5 && param->type > 0)
225 frame_type = frame_types[param->type];
226 else
227 return XVID_ERR_FAIL;
228
229 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
230 "%c %d %d %d %d %d %d\n",
231 frame_type, param->stats.quant, param->stats.kblks,
232 param->stats.mblks, param->stats.ublks,
233 param->stats.length, param->stats.hlength);
234
235 return 0;
236}
237
238/**
239 * Dispatch function for our custom plugin.
240 * This handles the dispatch for the Xvid plugin. It passes data
241 * on to other functions for actual processing.
242 *
243 * @param ref Context pointer for the plugin
244 * @param cmd The task given for us to complete
245 * @param p1 First parameter (varies)
246 * @param p2 Second parameter (varies)
247 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
248 */
249static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
250{
251 switch (cmd) {
252 case XVID_PLG_INFO:
253 case XVID_PLG_FRAME:
254 return 0;
255 case XVID_PLG_BEFORE:
256 return xvid_ff_2pass_before(ref, p1);
257 case XVID_PLG_CREATE:
258 return xvid_ff_2pass_create(p1, p2);
259 case XVID_PLG_AFTER:
260 return xvid_ff_2pass_after(ref, p1);
261 case XVID_PLG_DESTROY:
262 return xvid_ff_2pass_destroy(ref, p1);
263 default:
264 return XVID_ERR_FAIL;
265 }
266}
267
268/**
269 * Routine to create a global VO/VOL header for MP4 container.
270 * What we do here is extract the header from the Xvid bitstream
271 * as it is encoded. We also strip the repeated headers from the
272 * bitstream when a global header is requested for MPEG-4 ISO
273 * compliance.
274 *
275 * @param avctx AVCodecContext pointer to context
276 * @param frame Pointer to encoded frame data
277 * @param header_len Length of header to search
278 * @param frame_len Length of encoded frame data
279 * @return Returns new length of frame data
280 */
281static int xvid_strip_vol_header(AVCodecContext *avctx, AVPacket *pkt,
282 unsigned int header_len,
283 unsigned int frame_len)
284{
285 int vo_len = 0, i;
286
287 for (i = 0; i < header_len - 3; i++) {
288 if (pkt->data[i] == 0x00 &&
289 pkt->data[i + 1] == 0x00 &&
290 pkt->data[i + 2] == 0x01 &&
291 pkt->data[i + 3] == 0xB6) {
292 vo_len = i;
293 break;
294 }
295 }
296
297 if (vo_len > 0) {
298 /* We need to store the header, so extract it */
299 if (!avctx->extradata) {
300 avctx->extradata = av_malloc(vo_len);
301 if (!avctx->extradata)
302 return AVERROR(ENOMEM);
303 memcpy(avctx->extradata, pkt->data, vo_len);
304 avctx->extradata_size = vo_len;
305 }
306 /* Less dangerous now, memmove properly copies the two
307 * chunks of overlapping data */
308 memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
309 pkt->size = frame_len - vo_len;
310 }
311 return 0;
312}
313
314/**
315 * Routine to correct a possibly erroneous framerate being fed to us.
316 * Xvid currently chokes on framerates where the ticks per frame is
317 * extremely large. This function works to correct problems in this area
318 * by estimating a new framerate and taking the simpler fraction of
319 * the two presented.
320 *
321 * @param avctx Context that contains the framerate to correct.
322 */
323static void xvid_correct_framerate(AVCodecContext *avctx)
324{
325 int frate, fbase;
326 int est_frate, est_fbase;
327 int gcd;
328 float est_fps, fps;
329
330 frate = avctx->time_base.den;
331 fbase = avctx->time_base.num;
332
333 gcd = av_gcd(frate, fbase);
334 if (gcd > 1) {
335 frate /= gcd;
336 fbase /= gcd;
337 }
338
339 if (frate <= 65000 && fbase <= 65000) {
340 avctx->time_base.den = frate;
341 avctx->time_base.num = fbase;
342 return;
343 }
344
345 fps = (float) frate / (float) fbase;
346 est_fps = roundf(fps * 1000.0) / 1000.0;
347
348 est_frate = (int) est_fps;
349 if (est_fps > (int) est_fps) {
350 est_frate = (est_frate + 1) * 1000;
351 est_fbase = (int) roundf((float) est_frate / est_fps);
352 } else
353 est_fbase = 1;
354
355 gcd = av_gcd(est_frate, est_fbase);
356 if (gcd > 1) {
357 est_frate /= gcd;
358 est_fbase /= gcd;
359 }
360
361 if (fbase > est_fbase) {
362 avctx->time_base.den = est_frate;
363 avctx->time_base.num = est_fbase;
364 av_log(avctx, AV_LOG_DEBUG,
365 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
366 est_fps, (((est_fps - fps) / fps) * 100.0));
367 } else {
368 avctx->time_base.den = frate;
369 avctx->time_base.num = fbase;
370 }
371}
372
373static av_cold int xvid_encode_init(AVCodecContext *avctx)
374{
375 int xerr, i, ret = -1;
376 int xvid_flags = avctx->flags;
377 struct xvid_context *x = avctx->priv_data;
378 uint16_t *intra, *inter;
379 int fd;
380
381 xvid_plugin_single_t single = { 0 };
382 struct xvid_ff_pass1 rc2pass1 = { 0 };
383 xvid_plugin_2pass2_t rc2pass2 = { 0 };
384 xvid_plugin_lumimasking_t masking_l = { 0 }; /* For lumi masking */
385 xvid_plugin_lumimasking_t masking_v = { 0 }; /* For variance AQ */
386 xvid_plugin_ssim_t ssim = { 0 };
387 xvid_gbl_init_t xvid_gbl_init = { 0 };
388 xvid_enc_create_t xvid_enc_create = { 0 };
389 xvid_enc_plugin_t plugins[4];
390
391 x->twopassfd = -1;
392
393 /* Bring in VOP flags from ffmpeg command-line */
394 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
395 if (xvid_flags & AV_CODEC_FLAG_4MV)
396 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
397 if (avctx->trellis)
398 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
399 if (xvid_flags & AV_CODEC_FLAG_AC_PRED)
400 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
401 if (xvid_flags & AV_CODEC_FLAG_GRAY)
402 x->vop_flags |= XVID_VOP_GREYSCALE;
403
404 /* Decide which ME quality setting to use */
405 x->me_flags = 0;
406 switch (x->me_quality) {
407 case 6:
408 case 5:
409 x->me_flags |= XVID_ME_EXTSEARCH16 |
410 XVID_ME_EXTSEARCH8;
411 case 4:
412 case 3:
413 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8 |
414 XVID_ME_HALFPELREFINE8 |
415 XVID_ME_CHROMA_PVOP |
416 XVID_ME_CHROMA_BVOP;
417 case 2:
418 case 1:
419 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16 |
420 XVID_ME_HALFPELREFINE16;
421#if FF_API_MOTION_EST
422FF_DISABLE_DEPRECATION_WARNINGS
423 break;
424 default:
425 switch (avctx->me_method) {
426 case ME_FULL: /* Quality 6 */
427 x->me_flags |= XVID_ME_EXTSEARCH16 |
428 XVID_ME_EXTSEARCH8;
429 case ME_EPZS: /* Quality 4 */
430 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8 |
431 XVID_ME_HALFPELREFINE8 |
432 XVID_ME_CHROMA_PVOP |
433 XVID_ME_CHROMA_BVOP;
434 case ME_LOG: /* Quality 2 */
435 case ME_PHODS:
436 case ME_X1:
437 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16 |
438 XVID_ME_HALFPELREFINE16;
439 case ME_ZERO: /* Quality 0 */
440 default:
441 break;
442 }
443FF_ENABLE_DEPRECATION_WARNINGS
444#endif
445 }
446
447 /* Decide how we should decide blocks */
448 switch (avctx->mb_decision) {
449 case 2:
450 x->vop_flags |= XVID_VOP_MODEDECISION_RD;
451 x->me_flags |= XVID_ME_HALFPELREFINE8_RD |
452 XVID_ME_QUARTERPELREFINE8_RD |
453 XVID_ME_EXTSEARCH_RD |
454 XVID_ME_CHECKPREDICTION_RD;
455 case 1:
456 if (!(x->vop_flags & XVID_VOP_MODEDECISION_RD))
457 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
458 x->me_flags |= XVID_ME_HALFPELREFINE16_RD |
459 XVID_ME_QUARTERPELREFINE16_RD;
460 default:
461 break;
462 }
463
464 /* Bring in VOL flags from ffmpeg command-line */
465#if FF_API_GMC
466 if (avctx->flags & CODEC_FLAG_GMC)
467 x->gmc = 1;
468#endif
469
470 x->vol_flags = 0;
471 if (x->gmc) {
472 x->vol_flags |= XVID_VOL_GMC;
473 x->me_flags |= XVID_ME_GME_REFINE;
474 }
475 if (xvid_flags & AV_CODEC_FLAG_QPEL) {
476 x->vol_flags |= XVID_VOL_QUARTERPEL;
477 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
478 if (x->vop_flags & XVID_VOP_INTER4V)
479 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
480 }
481
482 xvid_gbl_init.version = XVID_VERSION;
483 xvid_gbl_init.debug = 0;
484 xvid_gbl_init.cpu_flags = 0;
485
486 /* Initialize */
487 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
488
489 /* Create the encoder reference */
490 xvid_enc_create.version = XVID_VERSION;
491
492 /* Store the desired frame size */
493 xvid_enc_create.width =
494 x->xsize = avctx->width;
495 xvid_enc_create.height =
496 x->ysize = avctx->height;
497
498 /* Xvid can determine the proper profile to use */
499 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
500
501 /* We don't use zones */
502 xvid_enc_create.zones = NULL;
503 xvid_enc_create.num_zones = 0;
504
505 xvid_enc_create.num_threads = avctx->thread_count;
506#if (XVID_VERSION <= 0x010303) && (XVID_VERSION >= 0x010300)
507 /* workaround for a bug in libxvidcore */
508 if (avctx->height <= 16) {
509 if (avctx->thread_count < 2) {
510 xvid_enc_create.num_threads = 0;
511 } else {
512 av_log(avctx, AV_LOG_ERROR,
513 "Too small height for threads > 1.");
514 return AVERROR(EINVAL);
515 }
516 }
517#endif
518
519 xvid_enc_create.plugins = plugins;
520 xvid_enc_create.num_plugins = 0;
521
522 /* Initialize Buffers */
523 x->twopassbuffer = NULL;
524 x->old_twopassbuffer = NULL;
525 x->twopassfile = NULL;
526
527 if (xvid_flags & AV_CODEC_FLAG_PASS1) {
528 rc2pass1.version = XVID_VERSION;
529 rc2pass1.context = x;
530 x->twopassbuffer = av_malloc(BUFFER_SIZE);
531 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
532 if (!x->twopassbuffer || !x->old_twopassbuffer) {
533 av_log(avctx, AV_LOG_ERROR,
534 "Xvid: Cannot allocate 2-pass log buffers\n");
535 return AVERROR(ENOMEM);
536 }
537 x->twopassbuffer[0] =
538 x->old_twopassbuffer[0] = 0;
539
540 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
541 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
542 xvid_enc_create.num_plugins++;
543 } else if (xvid_flags & AV_CODEC_FLAG_PASS2) {
544 rc2pass2.version = XVID_VERSION;
545 rc2pass2.bitrate = avctx->bit_rate;
546
547 fd = avpriv_tempfile("xvidff.", &x->twopassfile, 0, avctx);
548 if (fd < 0) {
549 av_log(avctx, AV_LOG_ERROR, "Xvid: Cannot write 2-pass pipe\n");
550 return fd;
551 }
552 x->twopassfd = fd;
553
554 if (!avctx->stats_in) {
555 av_log(avctx, AV_LOG_ERROR,
556 "Xvid: No 2-pass information loaded for second pass\n");
557 return AVERROR(EINVAL);
558 }
559
560 ret = write(fd, avctx->stats_in, strlen(avctx->stats_in));
561 if (ret == -1)
562 ret = AVERROR(errno);
563 else if (strlen(avctx->stats_in) > ret) {
564 av_log(avctx, AV_LOG_ERROR, "Xvid: Cannot write to 2-pass pipe\n");
565 ret = AVERROR(EIO);
566 }
567 if (ret < 0)
568 return ret;
569
570 rc2pass2.filename = x->twopassfile;
571 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
572 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
573 xvid_enc_create.num_plugins++;
574 } else if (!(xvid_flags & AV_CODEC_FLAG_QSCALE)) {
575 /* Single Pass Bitrate Control! */
576 single.version = XVID_VERSION;
577 single.bitrate = avctx->bit_rate;
578
579 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
580 plugins[xvid_enc_create.num_plugins].param = &single;
581 xvid_enc_create.num_plugins++;
582 }
583
584 if (avctx->lumi_masking != 0.0)
585 x->lumi_aq = 1;
586
587 /* Luminance Masking */
588 if (x->lumi_aq) {
589 masking_l.method = 0;
590 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
591
592 /* The old behavior is that when avctx->lumi_masking is specified,
593 * plugins[...].param = NULL. Trying to keep the old behavior here. */
594 plugins[xvid_enc_create.num_plugins].param =
595 avctx->lumi_masking ? NULL : &masking_l;
596 xvid_enc_create.num_plugins++;
597 }
598
599 /* Variance AQ */
600 if (x->variance_aq) {
601 masking_v.method = 1;
602 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
603 plugins[xvid_enc_create.num_plugins].param = &masking_v;
604 xvid_enc_create.num_plugins++;
605 }
606
607 if (x->lumi_aq && x->variance_aq )
608 av_log(avctx, AV_LOG_INFO,
609 "Both lumi_aq and variance_aq are enabled. The resulting quality"
610 "will be the worse one of the two effects made by the AQ.\n");
611
612 /* SSIM */
613 if (x->ssim) {
614 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_ssim;
615 ssim.b_printstat = x->ssim == 2;
616 ssim.acc = x->ssim_acc;
617 ssim.cpu_flags = xvid_gbl_init.cpu_flags;
618 ssim.b_visualize = 0;
619 plugins[xvid_enc_create.num_plugins].param = &ssim;
620 xvid_enc_create.num_plugins++;
621 }
622
623 /* Frame Rate and Key Frames */
624 xvid_correct_framerate(avctx);
625 xvid_enc_create.fincr = avctx->time_base.num;
626 xvid_enc_create.fbase = avctx->time_base.den;
627 if (avctx->gop_size > 0)
628 xvid_enc_create.max_key_interval = avctx->gop_size;
629 else
630 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
631
632 /* Quants */
633 if (xvid_flags & AV_CODEC_FLAG_QSCALE)
634 x->qscale = 1;
635 else
636 x->qscale = 0;
637
638 xvid_enc_create.min_quant[0] = avctx->qmin;
639 xvid_enc_create.min_quant[1] = avctx->qmin;
640 xvid_enc_create.min_quant[2] = avctx->qmin;
641 xvid_enc_create.max_quant[0] = avctx->qmax;
642 xvid_enc_create.max_quant[1] = avctx->qmax;
643 xvid_enc_create.max_quant[2] = avctx->qmax;
644
645 /* Quant Matrices */
646 x->intra_matrix =
647 x->inter_matrix = NULL;
648
649#if FF_API_PRIVATE_OPT
650FF_DISABLE_DEPRECATION_WARNINGS
651 if (avctx->mpeg_quant)
652 x->mpeg_quant = avctx->mpeg_quant;
653FF_ENABLE_DEPRECATION_WARNINGS
654#endif
655
656 if (x->mpeg_quant)
657 x->vol_flags |= XVID_VOL_MPEGQUANT;
658 if ((avctx->intra_matrix || avctx->inter_matrix)) {
659 x->vol_flags |= XVID_VOL_MPEGQUANT;
660
661 if (avctx->intra_matrix) {
662 intra = avctx->intra_matrix;
663 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
664 if (!x->intra_matrix)
665 return AVERROR(ENOMEM);
666 } else
667 intra = NULL;
668 if (avctx->inter_matrix) {
669 inter = avctx->inter_matrix;
670 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
671 if (!x->inter_matrix)
672 return AVERROR(ENOMEM);
673 } else
674 inter = NULL;
675
676 for (i = 0; i < 64; i++) {
677 if (intra)
678 x->intra_matrix[i] = (unsigned char) intra[i];
679 if (inter)
680 x->inter_matrix[i] = (unsigned char) inter[i];
681 }
682 }
683
684 /* Misc Settings */
685 xvid_enc_create.frame_drop_ratio = 0;
686 xvid_enc_create.global = 0;
687 if (xvid_flags & AV_CODEC_FLAG_CLOSED_GOP)
688 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
689
690 /* Determines which codec mode we are operating in */
691 avctx->extradata = NULL;
692 avctx->extradata_size = 0;
693 if (xvid_flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
694 /* In this case, we are claiming to be MPEG-4 */
695 x->quicktime_format = 1;
696 avctx->codec_id = AV_CODEC_ID_MPEG4;
697 } else {
698 /* We are claiming to be Xvid */
699 x->quicktime_format = 0;
700 if (!avctx->codec_tag)
701 avctx->codec_tag = AV_RL32("xvid");
702 }
703
704 /* Bframes */
705 xvid_enc_create.max_bframes = avctx->max_b_frames;
706 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
707 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
708 if (avctx->max_b_frames > 0 && !x->quicktime_format)
709 xvid_enc_create.global |= XVID_GLOBAL_PACKED;
710
711 av_assert0(xvid_enc_create.num_plugins + (!!x->ssim) + (!!x->variance_aq) + (!!x->lumi_aq) <= FF_ARRAY_ELEMS(plugins));
712
713 /* Encode a dummy frame to get the extradata immediately */
714 if (x->quicktime_format) {
715 AVFrame *picture;
716 AVPacket packet = {0};
717 int size, got_packet, ret;
718
719 av_init_packet(&packet);
720
721 picture = av_frame_alloc();
722 if (!picture)
723 return AVERROR(ENOMEM);
724
725 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
726 if( xerr ) {
727 av_frame_free(&picture);
728 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
729 return AVERROR_EXTERNAL;
730 }
731 x->encoder_handle = xvid_enc_create.handle;
732 size = ((avctx->width + 1) & ~1) * ((avctx->height + 1) & ~1);
733 picture->data[0] = av_malloc(size + size / 2);
734 if (!picture->data[0]) {
735 av_frame_free(&picture);
736 return AVERROR(ENOMEM);
737 }
738 picture->data[1] = picture->data[0] + size;
739 picture->data[2] = picture->data[1] + size / 4;
740 memset(picture->data[0], 0, size);
741 memset(picture->data[1], 128, size / 2);
742 ret = xvid_encode_frame(avctx, &packet, picture, &got_packet);
743 if (!ret && got_packet)
744 av_packet_unref(&packet);
745 av_free(picture->data[0]);
746 av_frame_free(&picture);
747 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
748 }
749
750 /* Create encoder context */
751 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
752 if (xerr) {
753 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
754 return AVERROR_EXTERNAL;
755 }
756
757 x->encoder_handle = xvid_enc_create.handle;
758
759 return 0;
760}
761
762static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
763 const AVFrame *picture, int *got_packet)
764{
765 int xerr, i, ret, user_packet = !!pkt->data;
766 struct xvid_context *x = avctx->priv_data;
767 int mb_width = (avctx->width + 15) / 16;
768 int mb_height = (avctx->height + 15) / 16;
769 char *tmp;
770
771 xvid_enc_frame_t xvid_enc_frame = { 0 };
772 xvid_enc_stats_t xvid_enc_stats = { 0 };
773
774 if ((ret = ff_alloc_packet2(avctx, pkt, mb_width*(int64_t)mb_height*MAX_MB_BYTES + AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)
775 return ret;
776
777 /* Start setting up the frame */
778 xvid_enc_frame.version = XVID_VERSION;
779 xvid_enc_stats.version = XVID_VERSION;
780
781 /* Let Xvid know where to put the frame. */
782 xvid_enc_frame.bitstream = pkt->data;
783 xvid_enc_frame.length = pkt->size;
784
785 /* Initialize input image fields */
786 if (avctx->pix_fmt != AV_PIX_FMT_YUV420P) {
787 av_log(avctx, AV_LOG_ERROR,
788 "Xvid: Color spaces other than 420P not supported\n");
789 return AVERROR(EINVAL);
790 }
791
792 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
793
794 for (i = 0; i < 4; i++) {
795 xvid_enc_frame.input.plane[i] = picture->data[i];
796 xvid_enc_frame.input.stride[i] = picture->linesize[i];
797 }
798
799 /* Encoder Flags */
800 xvid_enc_frame.vop_flags = x->vop_flags;
801 xvid_enc_frame.vol_flags = x->vol_flags;
802 xvid_enc_frame.motion = x->me_flags;
803 xvid_enc_frame.type =
804 picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
805 picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
806 picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
807 XVID_TYPE_AUTO;
808
809 /* Pixel aspect ratio setting */
810 if (avctx->sample_aspect_ratio.num < 0 || avctx->sample_aspect_ratio.num > 255 ||
811 avctx->sample_aspect_ratio.den < 0 || avctx->sample_aspect_ratio.den > 255) {
812 av_log(avctx, AV_LOG_WARNING,
813 "Invalid pixel aspect ratio %i/%i, limit is 255/255 reducing\n",
814 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
815 av_reduce(&avctx->sample_aspect_ratio.num, &avctx->sample_aspect_ratio.den,
816 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 255);
817 }
818 xvid_enc_frame.par = XVID_PAR_EXT;
819 xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
820 xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
821
822 /* Quant Setting */
823 if (x->qscale)
824 xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
825 else
826 xvid_enc_frame.quant = 0;
827
828 /* Matrices */
829 xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
830 xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
831
832 /* Encode */
833 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
834 &xvid_enc_frame, &xvid_enc_stats);
835
836 /* Two-pass log buffer swapping */
837 avctx->stats_out = NULL;
838 if (x->twopassbuffer) {
839 tmp = x->old_twopassbuffer;
840 x->old_twopassbuffer = x->twopassbuffer;
841 x->twopassbuffer = tmp;
842 x->twopassbuffer[0] = 0;
843 if (x->old_twopassbuffer[0] != 0) {
844 avctx->stats_out = x->old_twopassbuffer;
845 }
846 }
847
848 if (xerr > 0) {
849 int pict_type;
850
851 *got_packet = 1;
852
853 if (xvid_enc_stats.type == XVID_TYPE_PVOP)
854 pict_type = AV_PICTURE_TYPE_P;
855 else if (xvid_enc_stats.type == XVID_TYPE_BVOP)
856 pict_type = AV_PICTURE_TYPE_B;
857 else if (xvid_enc_stats.type == XVID_TYPE_SVOP)
858 pict_type = AV_PICTURE_TYPE_S;
859 else
860 pict_type = AV_PICTURE_TYPE_I;
861
862#if FF_API_CODED_FRAME
863FF_DISABLE_DEPRECATION_WARNINGS
864 avctx->coded_frame->pict_type = pict_type;
865 avctx->coded_frame->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
866FF_ENABLE_DEPRECATION_WARNINGS
867#endif
868
869 ff_side_data_set_encoder_stats(pkt, xvid_enc_stats.quant * FF_QP2LAMBDA, NULL, 0, pict_type);
870
871 if (xvid_enc_frame.out_flags & XVID_KEYFRAME) {
872#if FF_API_CODED_FRAME
873FF_DISABLE_DEPRECATION_WARNINGS
874 avctx->coded_frame->key_frame = 1;
875FF_ENABLE_DEPRECATION_WARNINGS
876#endif
877 pkt->flags |= AV_PKT_FLAG_KEY;
878 if (x->quicktime_format)
879 return xvid_strip_vol_header(avctx, pkt,
880 xvid_enc_stats.hlength, xerr);
881 } else {
882#if FF_API_CODED_FRAME
883FF_DISABLE_DEPRECATION_WARNINGS
884 avctx->coded_frame->key_frame = 0;
885FF_ENABLE_DEPRECATION_WARNINGS
886#endif
887 }
888
889 pkt->size = xerr;
890
891 return 0;
892 } else {
893 if (!user_packet)
894 av_packet_unref(pkt);
895 if (!xerr)
896 return 0;
897 av_log(avctx, AV_LOG_ERROR,
898 "Xvid: Encoding Error Occurred: %i\n", xerr);
899 return AVERROR_EXTERNAL;
900 }
901}
902
903static av_cold int xvid_encode_close(AVCodecContext *avctx)
904{
905 struct xvid_context *x = avctx->priv_data;
906
907 if (x->encoder_handle) {
908 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
909 x->encoder_handle = NULL;
910 }
911
912 av_freep(&avctx->extradata);
913 if (x->twopassbuffer) {
914 av_freep(&x->twopassbuffer);
915 av_freep(&x->old_twopassbuffer);
916 avctx->stats_out = NULL;
917 }
918 if (x->twopassfd>=0) {
919 unlink(x->twopassfile);
920 close(x->twopassfd);
921 x->twopassfd = -1;
922 }
923 av_freep(&x->twopassfile);
924 av_freep(&x->intra_matrix);
925 av_freep(&x->inter_matrix);
926
927 return 0;
928}
929
930#define OFFSET(x) offsetof(struct xvid_context, x)
931#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
932static const AVOption options[] = {
933 { "lumi_aq", "Luminance masking AQ", OFFSET(lumi_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
934 { "variance_aq", "Variance AQ", OFFSET(variance_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
935 { "ssim", "Show SSIM information to stdout", OFFSET(ssim), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, VE, "ssim" },
936 { "off", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "ssim" },
937 { "avg", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "ssim" },
938 { "frame", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "ssim" },
939 { "ssim_acc", "SSIM accuracy", OFFSET(ssim_acc), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, 4, VE },
940 { "gmc", "use GMC", OFFSET(gmc), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
941 { "me_quality", "Motion estimation quality", OFFSET(me_quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 6, VE },
942 { "mpeg_quant", "Use MPEG quantizers instead of H.263", OFFSET(mpeg_quant), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
943 { NULL },
944};
945
946static const AVClass xvid_class = {
947 .class_name = "libxvid",
948 .item_name = av_default_item_name,
949 .option = options,
950 .version = LIBAVUTIL_VERSION_INT,
951};
952
953AVCodec ff_libxvid_encoder = {
954 .name = "libxvid",
955 .long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
956 .type = AVMEDIA_TYPE_VIDEO,
957 .id = AV_CODEC_ID_MPEG4,
958 .priv_data_size = sizeof(struct xvid_context),
959 .init = xvid_encode_init,
960 .encode2 = xvid_encode_frame,
961 .close = xvid_encode_close,
962 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
963 .priv_class = &xvid_class,
964 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
965 FF_CODEC_CAP_INIT_CLEANUP,
966};
967
generated by cgit at 2024-05-17 02:05:24 (GMT)