FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
libxvid.c
Go to the documentation of this file.
1 /*
2  * Interface to xvidcore for mpeg4 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 <xvid.h>
29 
30 #include "libavutil/cpu.h"
31 #include "libavutil/file.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/mathematics.h"
34 
35 #include "avcodec.h"
36 #include "internal.h"
37 #include "libxvid.h"
38 #include "mpegvideo.h"
39 
40 #if HAVE_UNISTD_H
41 #include <unistd.h>
42 #endif
43 
44 #if HAVE_IO_H
45 #include <io.h>
46 #endif
47 
48 /**
49  * Buffer management macros.
50  */
51 #define BUFFER_SIZE 1024
52 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
53 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
54 
55 /**
56  * Structure for the private Xvid context.
57  * This stores all the private context for the codec.
58  */
59 struct xvid_context {
60  AVClass *class;
61  void *encoder_handle; /**< Handle for Xvid encoder */
62  int xsize; /**< Frame x size */
63  int ysize; /**< Frame y size */
64  int vop_flags; /**< VOP flags for Xvid encoder */
65  int vol_flags; /**< VOL flags for Xvid encoder */
66  int me_flags; /**< Motion Estimation flags */
67  int qscale; /**< Do we use constant scale? */
68  int quicktime_format; /**< Are we in a QT-based format? */
69  char *twopassbuffer; /**< Character buffer for two-pass */
70  char *old_twopassbuffer; /**< Old character buffer (two-pass) */
71  char *twopassfile; /**< second pass temp file name */
72  int twopassfd;
73  unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
74  unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
75  int lumi_aq; /**< Lumi masking as an aq method */
76  int variance_aq; /**< Variance adaptive quantization */
77  int ssim; /**< SSIM information display mode */
78  int ssim_acc; /**< SSIM accuracy. 0: accurate. 4: fast. */
79  int gmc;
80  int me_quality; /**< Motion estimation quality. 0: fast 6: best. */
81 };
82 
83 /**
84  * Structure for the private first-pass plugin.
85  */
86 struct xvid_ff_pass1 {
87  int version; /**< Xvid version */
88  struct xvid_context *context; /**< Pointer to private context */
89 };
90 
91 static int xvid_encode_close(AVCodecContext *avctx);
92 
93 /*
94  * Xvid 2-Pass Kludge Section
95  *
96  * Xvid's default 2-pass doesn't allow us to create data as we need to, so
97  * this section spends time replacing the first pass plugin so we can write
98  * statistic information as libavcodec requests in. We have another kludge
99  * that allows us to pass data to the second pass in Xvid without a custom
100  * rate-control plugin.
101  */
102 
103 /**
104  * Initialize the two-pass plugin and context.
105  *
106  * @param param Input construction parameter structure
107  * @param handle Private context handle
108  * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
109  */
110 static int xvid_ff_2pass_create(xvid_plg_create_t *param, void **handle)
111 {
112  struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *) param->param;
113  char *log = x->context->twopassbuffer;
114 
115  /* Do a quick bounds check */
116  if (!log)
117  return XVID_ERR_FAIL;
118 
119  /* We use snprintf() */
120  /* This is because we can safely prevent a buffer overflow */
121  log[0] = 0;
122  snprintf(log, BUFFER_REMAINING(log),
123  "# ffmpeg 2-pass log file, using xvid codec\n");
125  "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
126  XVID_VERSION_MAJOR(XVID_VERSION),
127  XVID_VERSION_MINOR(XVID_VERSION),
128  XVID_VERSION_PATCH(XVID_VERSION));
129 
130  *handle = x->context;
131  return 0;
132 }
133 
134 /**
135  * Destroy the two-pass plugin context.
136  *
137  * @param ref Context pointer for the plugin
138  * @param param Destrooy context
139  * @return Returns 0, success guaranteed
140  */
141 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
142  xvid_plg_destroy_t *param)
143 {
144  /* Currently cannot think of anything to do on destruction */
145  /* Still, the framework should be here for reference/use */
146  if (ref->twopassbuffer)
147  ref->twopassbuffer[0] = 0;
148  return 0;
149 }
150 
151 /**
152  * Enable fast encode mode during the first pass.
153  *
154  * @param ref Context pointer for the plugin
155  * @param param Frame data
156  * @return Returns 0, success guaranteed
157  */
158 static int xvid_ff_2pass_before(struct xvid_context *ref,
159  xvid_plg_data_t *param)
160 {
161  int motion_remove;
162  int motion_replacements;
163  int vop_remove;
164 
165  /* Nothing to do here, result is changed too much */
166  if (param->zone && param->zone->mode == XVID_ZONE_QUANT)
167  return 0;
168 
169  /* We can implement a 'turbo' first pass mode here */
170  param->quant = 2;
171 
172  /* Init values */
173  motion_remove = ~XVID_ME_CHROMA_PVOP &
174  ~XVID_ME_CHROMA_BVOP &
175  ~XVID_ME_EXTSEARCH16 &
176  ~XVID_ME_ADVANCEDDIAMOND16;
177  motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
178  XVID_ME_SKIP_DELTASEARCH |
179  XVID_ME_FASTREFINE16 |
180  XVID_ME_BFRAME_EARLYSTOP;
181  vop_remove = ~XVID_VOP_MODEDECISION_RD &
182  ~XVID_VOP_FAST_MODEDECISION_RD &
183  ~XVID_VOP_TRELLISQUANT &
184  ~XVID_VOP_INTER4V &
185  ~XVID_VOP_HQACPRED;
186 
187  param->vol_flags &= ~XVID_VOL_GMC;
188  param->vop_flags &= vop_remove;
189  param->motion_flags &= motion_remove;
190  param->motion_flags |= motion_replacements;
191 
192  return 0;
193 }
194 
195 /**
196  * Capture statistic data and write it during first pass.
197  *
198  * @param ref Context pointer for the plugin
199  * @param param Statistic data
200  * @return Returns XVID_ERR_xxxx on failure, or 0 on success
201  */
202 static int xvid_ff_2pass_after(struct xvid_context *ref,
203  xvid_plg_data_t *param)
204 {
205  char *log = ref->twopassbuffer;
206  const char *frame_types = " ipbs";
207  char frame_type;
208 
209  /* Quick bounds check */
210  if (!log)
211  return XVID_ERR_FAIL;
212 
213  /* Convert the type given to us into a character */
214  if (param->type < 5 && param->type > 0)
215  frame_type = frame_types[param->type];
216  else
217  return XVID_ERR_FAIL;
218 
220  "%c %d %d %d %d %d %d\n",
221  frame_type, param->stats.quant, param->stats.kblks,
222  param->stats.mblks, param->stats.ublks,
223  param->stats.length, param->stats.hlength);
224 
225  return 0;
226 }
227 
228 /**
229  * Dispatch function for our custom plugin.
230  * This handles the dispatch for the Xvid plugin. It passes data
231  * on to other functions for actual processing.
232  *
233  * @param ref Context pointer for the plugin
234  * @param cmd The task given for us to complete
235  * @param p1 First parameter (varies)
236  * @param p2 Second parameter (varies)
237  * @return Returns XVID_ERR_xxxx on failure, or 0 on success
238  */
239 static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
240 {
241  switch (cmd) {
242  case XVID_PLG_INFO:
243  case XVID_PLG_FRAME:
244  return 0;
245  case XVID_PLG_BEFORE:
246  return xvid_ff_2pass_before(ref, p1);
247  case XVID_PLG_CREATE:
248  return xvid_ff_2pass_create(p1, p2);
249  case XVID_PLG_AFTER:
250  return xvid_ff_2pass_after(ref, p1);
251  case XVID_PLG_DESTROY:
252  return xvid_ff_2pass_destroy(ref, p1);
253  default:
254  return XVID_ERR_FAIL;
255  }
256 }
257 
258 /**
259  * Routine to create a global VO/VOL header for MP4 container.
260  * What we do here is extract the header from the Xvid bitstream
261  * as it is encoded. We also strip the repeated headers from the
262  * bitstream when a global header is requested for MPEG-4 ISO
263  * compliance.
264  *
265  * @param avctx AVCodecContext pointer to context
266  * @param frame Pointer to encoded frame data
267  * @param header_len Length of header to search
268  * @param frame_len Length of encoded frame data
269  * @return Returns new length of frame data
270  */
272  unsigned int header_len,
273  unsigned int frame_len)
274 {
275  int vo_len = 0, i;
276 
277  for (i = 0; i < header_len - 3; i++) {
278  if (pkt->data[i] == 0x00 &&
279  pkt->data[i + 1] == 0x00 &&
280  pkt->data[i + 2] == 0x01 &&
281  pkt->data[i + 3] == 0xB6) {
282  vo_len = i;
283  break;
284  }
285  }
286 
287  if (vo_len > 0) {
288  /* We need to store the header, so extract it */
289  if (!avctx->extradata) {
290  avctx->extradata = av_malloc(vo_len);
291  if (!avctx->extradata)
292  return AVERROR(ENOMEM);
293  memcpy(avctx->extradata, pkt->data, vo_len);
294  avctx->extradata_size = vo_len;
295  }
296  /* Less dangerous now, memmove properly copies the two
297  * chunks of overlapping data */
298  memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
299  pkt->size = frame_len - vo_len;
300  }
301  return 0;
302 }
303 
304 /**
305  * Routine to correct a possibly erroneous framerate being fed to us.
306  * Xvid currently chokes on framerates where the ticks per frame is
307  * extremely large. This function works to correct problems in this area
308  * by estimating a new framerate and taking the simpler fraction of
309  * the two presented.
310  *
311  * @param avctx Context that contains the framerate to correct.
312  */
314 {
315  int frate, fbase;
316  int est_frate, est_fbase;
317  int gcd;
318  float est_fps, fps;
319 
320  frate = avctx->time_base.den;
321  fbase = avctx->time_base.num;
322 
323  gcd = av_gcd(frate, fbase);
324  if (gcd > 1) {
325  frate /= gcd;
326  fbase /= gcd;
327  }
328 
329  if (frate <= 65000 && fbase <= 65000) {
330  avctx->time_base.den = frate;
331  avctx->time_base.num = fbase;
332  return;
333  }
334 
335  fps = (float) frate / (float) fbase;
336  est_fps = roundf(fps * 1000.0) / 1000.0;
337 
338  est_frate = (int) est_fps;
339  if (est_fps > (int) est_fps) {
340  est_frate = (est_frate + 1) * 1000;
341  est_fbase = (int) roundf((float) est_frate / est_fps);
342  } else
343  est_fbase = 1;
344 
345  gcd = av_gcd(est_frate, est_fbase);
346  if (gcd > 1) {
347  est_frate /= gcd;
348  est_fbase /= gcd;
349  }
350 
351  if (fbase > est_fbase) {
352  avctx->time_base.den = est_frate;
353  avctx->time_base.num = est_fbase;
354  av_log(avctx, AV_LOG_DEBUG,
355  "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
356  est_fps, (((est_fps - fps) / fps) * 100.0));
357  } else {
358  avctx->time_base.den = frate;
359  avctx->time_base.num = fbase;
360  }
361 }
362 
364 {
365  int xerr, i, ret = -1;
366  int xvid_flags = avctx->flags;
367  struct xvid_context *x = avctx->priv_data;
368  uint16_t *intra, *inter;
369  int fd;
370 
371  xvid_plugin_single_t single = { 0 };
372  struct xvid_ff_pass1 rc2pass1 = { 0 };
373  xvid_plugin_2pass2_t rc2pass2 = { 0 };
374  xvid_plugin_lumimasking_t masking_l = { 0 }; /* For lumi masking */
375  xvid_plugin_lumimasking_t masking_v = { 0 }; /* For variance AQ */
376  xvid_plugin_ssim_t ssim = { 0 };
377  xvid_gbl_init_t xvid_gbl_init = { 0 };
378  xvid_enc_create_t xvid_enc_create = { 0 };
379  xvid_enc_plugin_t plugins[4];
380 
381  x->twopassfd = -1;
382 
383  /* Bring in VOP flags from ffmpeg command-line */
384  x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
385  if (xvid_flags & AV_CODEC_FLAG_4MV)
386  x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
387  if (avctx->trellis)
388  x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
389  if (xvid_flags & AV_CODEC_FLAG_AC_PRED)
390  x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
391  if (xvid_flags & AV_CODEC_FLAG_GRAY)
392  x->vop_flags |= XVID_VOP_GREYSCALE;
393 
394  /* Decide which ME quality setting to use */
395  x->me_flags = 0;
396  switch (x->me_quality) {
397  case 6:
398  case 5:
399  x->me_flags |= XVID_ME_EXTSEARCH16 |
400  XVID_ME_EXTSEARCH8;
401  case 4:
402  case 3:
403  x->me_flags |= XVID_ME_ADVANCEDDIAMOND8 |
404  XVID_ME_HALFPELREFINE8 |
405  XVID_ME_CHROMA_PVOP |
406  XVID_ME_CHROMA_BVOP;
407  case 2:
408  case 1:
409  x->me_flags |= XVID_ME_ADVANCEDDIAMOND16 |
410  XVID_ME_HALFPELREFINE16;
411 #if FF_API_MOTION_EST
413  break;
414  default:
415  switch (avctx->me_method) {
416  case ME_FULL: /* Quality 6 */
417  x->me_flags |= XVID_ME_EXTSEARCH16 |
418  XVID_ME_EXTSEARCH8;
419  case ME_EPZS: /* Quality 4 */
420  x->me_flags |= XVID_ME_ADVANCEDDIAMOND8 |
421  XVID_ME_HALFPELREFINE8 |
422  XVID_ME_CHROMA_PVOP |
423  XVID_ME_CHROMA_BVOP;
424  case ME_LOG: /* Quality 2 */
425  case ME_PHODS:
426  case ME_X1:
427  x->me_flags |= XVID_ME_ADVANCEDDIAMOND16 |
428  XVID_ME_HALFPELREFINE16;
429  case ME_ZERO: /* Quality 0 */
430  default:
431  break;
432  }
434 #endif
435  }
436 
437  /* Decide how we should decide blocks */
438  switch (avctx->mb_decision) {
439  case 2:
440  x->vop_flags |= XVID_VOP_MODEDECISION_RD;
441  x->me_flags |= XVID_ME_HALFPELREFINE8_RD |
442  XVID_ME_QUARTERPELREFINE8_RD |
443  XVID_ME_EXTSEARCH_RD |
444  XVID_ME_CHECKPREDICTION_RD;
445  case 1:
446  if (!(x->vop_flags & XVID_VOP_MODEDECISION_RD))
447  x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
448  x->me_flags |= XVID_ME_HALFPELREFINE16_RD |
449  XVID_ME_QUARTERPELREFINE16_RD;
450  default:
451  break;
452  }
453 
454  /* Bring in VOL flags from ffmpeg command-line */
455 #if FF_API_GMC
456  if (avctx->flags & CODEC_FLAG_GMC)
457  x->gmc = 1;
458 #endif
459 
460  x->vol_flags = 0;
461  if (x->gmc) {
462  x->vol_flags |= XVID_VOL_GMC;
463  x->me_flags |= XVID_ME_GME_REFINE;
464  }
465  if (xvid_flags & AV_CODEC_FLAG_QPEL) {
466  x->vol_flags |= XVID_VOL_QUARTERPEL;
467  x->me_flags |= XVID_ME_QUARTERPELREFINE16;
468  if (x->vop_flags & XVID_VOP_INTER4V)
469  x->me_flags |= XVID_ME_QUARTERPELREFINE8;
470  }
471 
472  xvid_gbl_init.version = XVID_VERSION;
473  xvid_gbl_init.debug = 0;
474  xvid_gbl_init.cpu_flags = 0;
475 
476  /* Initialize */
477  xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
478 
479  /* Create the encoder reference */
480  xvid_enc_create.version = XVID_VERSION;
481 
482  /* Store the desired frame size */
483  xvid_enc_create.width =
484  x->xsize = avctx->width;
485  xvid_enc_create.height =
486  x->ysize = avctx->height;
487 
488  /* Xvid can determine the proper profile to use */
489  /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
490 
491  /* We don't use zones */
492  xvid_enc_create.zones = NULL;
493  xvid_enc_create.num_zones = 0;
494 
495  xvid_enc_create.num_threads = avctx->thread_count;
496 #if (XVID_VERSION <= 0x010303) && (XVID_VERSION >= 0x010300)
497  /* workaround for a bug in libxvidcore */
498  if (avctx->height <= 16) {
499  if (avctx->thread_count < 2) {
500  xvid_enc_create.num_threads = 0;
501  } else {
502  av_log(avctx, AV_LOG_ERROR,
503  "Too small height for threads > 1.");
504  return AVERROR(EINVAL);
505  }
506  }
507 #endif
508 
509  xvid_enc_create.plugins = plugins;
510  xvid_enc_create.num_plugins = 0;
511 
512  /* Initialize Buffers */
513  x->twopassbuffer = NULL;
514  x->old_twopassbuffer = NULL;
515  x->twopassfile = NULL;
516 
517  if (xvid_flags & AV_CODEC_FLAG_PASS1) {
518  rc2pass1.version = XVID_VERSION;
519  rc2pass1.context = x;
522  if (!x->twopassbuffer || !x->old_twopassbuffer) {
523  av_log(avctx, AV_LOG_ERROR,
524  "Xvid: Cannot allocate 2-pass log buffers\n");
525  return AVERROR(ENOMEM);
526  }
527  x->twopassbuffer[0] =
528  x->old_twopassbuffer[0] = 0;
529 
530  plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
531  plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
532  xvid_enc_create.num_plugins++;
533  } else if (xvid_flags & AV_CODEC_FLAG_PASS2) {
534  rc2pass2.version = XVID_VERSION;
535  rc2pass2.bitrate = avctx->bit_rate;
536 
537  fd = av_tempfile("xvidff.", &x->twopassfile, 0, avctx);
538  if (fd < 0) {
539  av_log(avctx, AV_LOG_ERROR, "Xvid: Cannot write 2-pass pipe\n");
540  return fd;
541  }
542  x->twopassfd = fd;
543 
544  if (!avctx->stats_in) {
545  av_log(avctx, AV_LOG_ERROR,
546  "Xvid: No 2-pass information loaded for second pass\n");
547  return AVERROR(EINVAL);
548  }
549 
550  ret = write(fd, avctx->stats_in, strlen(avctx->stats_in));
551  if (ret == -1)
552  ret = AVERROR(errno);
553  else if (strlen(avctx->stats_in) > ret) {
554  av_log(avctx, AV_LOG_ERROR, "Xvid: Cannot write to 2-pass pipe\n");
555  ret = AVERROR(EIO);
556  }
557  if (ret < 0)
558  return ret;
559 
560  rc2pass2.filename = x->twopassfile;
561  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
562  plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
563  xvid_enc_create.num_plugins++;
564  } else if (!(xvid_flags & AV_CODEC_FLAG_QSCALE)) {
565  /* Single Pass Bitrate Control! */
566  single.version = XVID_VERSION;
567  single.bitrate = avctx->bit_rate;
568 
569  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
570  plugins[xvid_enc_create.num_plugins].param = &single;
571  xvid_enc_create.num_plugins++;
572  }
573 
574  if (avctx->lumi_masking != 0.0)
575  x->lumi_aq = 1;
576 
577  /* Luminance Masking */
578  if (x->lumi_aq) {
579  masking_l.method = 0;
580  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
581 
582  /* The old behavior is that when avctx->lumi_masking is specified,
583  * plugins[...].param = NULL. Trying to keep the old behavior here. */
584  plugins[xvid_enc_create.num_plugins].param =
585  avctx->lumi_masking ? NULL : &masking_l;
586  xvid_enc_create.num_plugins++;
587  }
588 
589  /* Variance AQ */
590  if (x->variance_aq) {
591  masking_v.method = 1;
592  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
593  plugins[xvid_enc_create.num_plugins].param = &masking_v;
594  xvid_enc_create.num_plugins++;
595  }
596 
597  if (x->lumi_aq && x->variance_aq )
598  av_log(avctx, AV_LOG_INFO,
599  "Both lumi_aq and variance_aq are enabled. The resulting quality"
600  "will be the worse one of the two effects made by the AQ.\n");
601 
602  /* SSIM */
603  if (x->ssim) {
604  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_ssim;
605  ssim.b_printstat = x->ssim == 2;
606  ssim.acc = x->ssim_acc;
607  ssim.cpu_flags = xvid_gbl_init.cpu_flags;
608  ssim.b_visualize = 0;
609  plugins[xvid_enc_create.num_plugins].param = &ssim;
610  xvid_enc_create.num_plugins++;
611  }
612 
613  /* Frame Rate and Key Frames */
614  xvid_correct_framerate(avctx);
615  xvid_enc_create.fincr = avctx->time_base.num;
616  xvid_enc_create.fbase = avctx->time_base.den;
617  if (avctx->gop_size > 0)
618  xvid_enc_create.max_key_interval = avctx->gop_size;
619  else
620  xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
621 
622  /* Quants */
623  if (xvid_flags & AV_CODEC_FLAG_QSCALE)
624  x->qscale = 1;
625  else
626  x->qscale = 0;
627 
628  xvid_enc_create.min_quant[0] = avctx->qmin;
629  xvid_enc_create.min_quant[1] = avctx->qmin;
630  xvid_enc_create.min_quant[2] = avctx->qmin;
631  xvid_enc_create.max_quant[0] = avctx->qmax;
632  xvid_enc_create.max_quant[1] = avctx->qmax;
633  xvid_enc_create.max_quant[2] = avctx->qmax;
634 
635  /* Quant Matrices */
636  x->intra_matrix =
637  x->inter_matrix = NULL;
638  if (avctx->mpeg_quant)
639  x->vol_flags |= XVID_VOL_MPEGQUANT;
640  if ((avctx->intra_matrix || avctx->inter_matrix)) {
641  x->vol_flags |= XVID_VOL_MPEGQUANT;
642 
643  if (avctx->intra_matrix) {
644  intra = avctx->intra_matrix;
645  x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
646  if (!x->intra_matrix)
647  return AVERROR(ENOMEM);
648  } else
649  intra = NULL;
650  if (avctx->inter_matrix) {
651  inter = avctx->inter_matrix;
652  x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
653  if (!x->inter_matrix)
654  return AVERROR(ENOMEM);
655  } else
656  inter = NULL;
657 
658  for (i = 0; i < 64; i++) {
659  if (intra)
660  x->intra_matrix[i] = (unsigned char) intra[i];
661  if (inter)
662  x->inter_matrix[i] = (unsigned char) inter[i];
663  }
664  }
665 
666  /* Misc Settings */
667  xvid_enc_create.frame_drop_ratio = 0;
668  xvid_enc_create.global = 0;
669  if (xvid_flags & AV_CODEC_FLAG_CLOSED_GOP)
670  xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
671 
672  /* Determines which codec mode we are operating in */
673  avctx->extradata = NULL;
674  avctx->extradata_size = 0;
675  if (xvid_flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
676  /* In this case, we are claiming to be MPEG4 */
677  x->quicktime_format = 1;
678  avctx->codec_id = AV_CODEC_ID_MPEG4;
679  } else {
680  /* We are claiming to be Xvid */
681  x->quicktime_format = 0;
682  if (!avctx->codec_tag)
683  avctx->codec_tag = AV_RL32("xvid");
684  }
685 
686  /* Bframes */
687  xvid_enc_create.max_bframes = avctx->max_b_frames;
688  xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
689  xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
690  if (avctx->max_b_frames > 0 && !x->quicktime_format)
691  xvid_enc_create.global |= XVID_GLOBAL_PACKED;
692 
693  av_assert0(xvid_enc_create.num_plugins + (!!x->ssim) + (!!x->variance_aq) + (!!x->lumi_aq) <= FF_ARRAY_ELEMS(plugins));
694 
695  /* Create encoder context */
696  xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
697  if (xerr) {
698  av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
699  return AVERROR_EXTERNAL;
700  }
701 
702  x->encoder_handle = xvid_enc_create.handle;
703 
704  return 0;
705 }
706 
708  const AVFrame *picture, int *got_packet)
709 {
710  int xerr, i, ret, user_packet = !!pkt->data;
711  struct xvid_context *x = avctx->priv_data;
712  int mb_width = (avctx->width + 15) / 16;
713  int mb_height = (avctx->height + 15) / 16;
714  char *tmp;
715 
716  xvid_enc_frame_t xvid_enc_frame = { 0 };
717  xvid_enc_stats_t xvid_enc_stats = { 0 };
718 
719  if ((ret = ff_alloc_packet2(avctx, pkt, mb_width*(int64_t)mb_height*MAX_MB_BYTES + AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)
720  return ret;
721 
722  /* Start setting up the frame */
723  xvid_enc_frame.version = XVID_VERSION;
724  xvid_enc_stats.version = XVID_VERSION;
725 
726  /* Let Xvid know where to put the frame. */
727  xvid_enc_frame.bitstream = pkt->data;
728  xvid_enc_frame.length = pkt->size;
729 
730  /* Initialize input image fields */
731  if (avctx->pix_fmt != AV_PIX_FMT_YUV420P) {
732  av_log(avctx, AV_LOG_ERROR,
733  "Xvid: Color spaces other than 420P not supported\n");
734  return AVERROR(EINVAL);
735  }
736 
737  xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
738 
739  for (i = 0; i < 4; i++) {
740  xvid_enc_frame.input.plane[i] = picture->data[i];
741  xvid_enc_frame.input.stride[i] = picture->linesize[i];
742  }
743 
744  /* Encoder Flags */
745  xvid_enc_frame.vop_flags = x->vop_flags;
746  xvid_enc_frame.vol_flags = x->vol_flags;
747  xvid_enc_frame.motion = x->me_flags;
748  xvid_enc_frame.type =
749  picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
750  picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
751  picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
752  XVID_TYPE_AUTO;
753 
754  /* Pixel aspect ratio setting */
755  if (avctx->sample_aspect_ratio.num < 0 || avctx->sample_aspect_ratio.num > 255 ||
756  avctx->sample_aspect_ratio.den < 0 || avctx->sample_aspect_ratio.den > 255) {
757  av_log(avctx, AV_LOG_WARNING,
758  "Invalid pixel aspect ratio %i/%i, limit is 255/255 reducing\n",
761  avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 255);
762  }
763  xvid_enc_frame.par = XVID_PAR_EXT;
764  xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
765  xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
766 
767  /* Quant Setting */
768  if (x->qscale)
769  xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
770  else
771  xvid_enc_frame.quant = 0;
772 
773  /* Matrices */
774  xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
775  xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
776 
777  /* Encode */
778  xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
779  &xvid_enc_frame, &xvid_enc_stats);
780 
781  /* Two-pass log buffer swapping */
782  avctx->stats_out = NULL;
783  if (x->twopassbuffer) {
784  tmp = x->old_twopassbuffer;
786  x->twopassbuffer = tmp;
787  x->twopassbuffer[0] = 0;
788  if (x->old_twopassbuffer[0] != 0) {
789  avctx->stats_out = x->old_twopassbuffer;
790  }
791  }
792 
793  if (xerr > 0) {
794  int pict_type;
795 
796  *got_packet = 1;
797 
798  if (xvid_enc_stats.type == XVID_TYPE_PVOP)
799  pict_type = AV_PICTURE_TYPE_P;
800  else if (xvid_enc_stats.type == XVID_TYPE_BVOP)
801  pict_type = AV_PICTURE_TYPE_B;
802  else if (xvid_enc_stats.type == XVID_TYPE_SVOP)
803  pict_type = AV_PICTURE_TYPE_S;
804  else
805  pict_type = AV_PICTURE_TYPE_I;
806 
807 #if FF_API_CODED_FRAME
809  avctx->coded_frame->pict_type = pict_type;
810  avctx->coded_frame->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
812 #endif
813 
814  ff_side_data_set_encoder_stats(pkt, xvid_enc_stats.quant * FF_QP2LAMBDA, NULL, 0, pict_type);
815 
816  if (xvid_enc_frame.out_flags & XVID_KEYFRAME) {
817 #if FF_API_CODED_FRAME
819  avctx->coded_frame->key_frame = 1;
821 #endif
822  pkt->flags |= AV_PKT_FLAG_KEY;
823  if (x->quicktime_format)
824  return xvid_strip_vol_header(avctx, pkt,
825  xvid_enc_stats.hlength, xerr);
826  } else {
827 #if FF_API_CODED_FRAME
829  avctx->coded_frame->key_frame = 0;
831 #endif
832  }
833 
834  pkt->size = xerr;
835 
836  return 0;
837  } else {
838  if (!user_packet)
839  av_free_packet(pkt);
840  if (!xerr)
841  return 0;
842  av_log(avctx, AV_LOG_ERROR,
843  "Xvid: Encoding Error Occurred: %i\n", xerr);
844  return AVERROR_EXTERNAL;
845  }
846 }
847 
849 {
850  struct xvid_context *x = avctx->priv_data;
851 
852  if (x->encoder_handle) {
853  xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
854  x->encoder_handle = NULL;
855  }
856 
857  av_freep(&avctx->extradata);
858  if (x->twopassbuffer) {
859  av_freep(&x->twopassbuffer);
861  avctx->stats_out = NULL;
862  }
863  if (x->twopassfd>=0) {
864  unlink(x->twopassfile);
865  close(x->twopassfd);
866  x->twopassfd = -1;
867  }
868  av_freep(&x->twopassfile);
869  av_freep(&x->intra_matrix);
870  av_freep(&x->inter_matrix);
871 
872  return 0;
873 }
874 
875 #define OFFSET(x) offsetof(struct xvid_context, x)
876 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
877 static const AVOption options[] = {
878  { "lumi_aq", "Luminance masking AQ", OFFSET(lumi_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
879  { "variance_aq", "Variance AQ", OFFSET(variance_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
880  { "ssim", "Show SSIM information to stdout", OFFSET(ssim), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, VE, "ssim" },
881  { "off", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "ssim" },
882  { "avg", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "ssim" },
883  { "frame", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "ssim" },
884  { "ssim_acc", "SSIM accuracy", OFFSET(ssim_acc), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, 4, VE },
885  { "gmc", "use GMC", OFFSET(gmc), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
886  { "me_quality", "Motion estimation quality", OFFSET(me_quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 6, VE },
887  { NULL },
888 };
889 
890 static const AVClass xvid_class = {
891  .class_name = "libxvid",
892  .item_name = av_default_item_name,
893  .option = options,
894  .version = LIBAVUTIL_VERSION_INT,
895 };
896 
898  .name = "libxvid",
899  .long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
900  .type = AVMEDIA_TYPE_VIDEO,
901  .id = AV_CODEC_ID_MPEG4,
902  .priv_data_size = sizeof(struct xvid_context),
903  .init = xvid_encode_init,
904  .encode2 = xvid_encode_frame,
905  .close = xvid_encode_close,
906  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
907  .priv_class = &xvid_class,
908  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
910 };
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
#define NULL
Definition: coverity.c:32
S(GMC)-VOP MPEG4.
Definition: avutil.h:269
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:280
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
int mpeg_quant
0-> h263 quant 1-> mpeg quant
Definition: avcodec.h:1819
AVOption.
Definition: opt.h:255
char * old_twopassbuffer
Old character buffer (two-pass)
Definition: libxvid.c:70
int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
Definition: avpacket.c:606
AVCodec ff_libxvid_encoder
Definition: libxvid.c:897
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:62
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
Definition: avcodec.h:1780
#define BUFFER_REMAINING(x)
Definition: libxvid.c:52
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:1424
enhanced predictive zonal search
Definition: avcodec.h:668
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1902
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1722
char * stats_in
pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed he...
Definition: avcodec.h:2779
mpegvideo header.
unsigned char * intra_matrix
P-Frame Quant Matrix.
Definition: libxvid.c:73
static AVPacket pkt
int ysize
Frame y size.
Definition: libxvid.c:63
AVCodec.
Definition: avcodec.h:3472
int me_flags
Motion Estimation flags.
Definition: libxvid.c:66
attribute_deprecated int me_method
This option does nothing.
Definition: avcodec.h:1729
common functions for use with the Xvid wrappers
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1631
int xsize
Frame x size.
Definition: libxvid.c:62
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
#define av_cold
Definition: attributes.h:74
#define av_malloc(s)
static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *picture, int *got_packet)
Definition: libxvid.c:707
float b_quant_factor
qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q...
Definition: avcodec.h:1789
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1617
int quicktime_format
Are we in a QT-based format?
Definition: libxvid.c:68
Misc file utilities.
uint8_t * data
Definition: avcodec.h:1423
struct xvid_context * context
Pointer to private context.
Definition: libxvid.c:88
static int xvid_strip_vol_header(AVCodecContext *avctx, AVPacket *pkt, unsigned int header_len, unsigned int frame_len)
Routine to create a global VO/VOL header for MP4 container.
Definition: libxvid.c:271
float lumi_masking
luminance masking (0-> disabled)
Definition: avcodec.h:1842
char * stats_out
pass1 encoding statistics output buffer
Definition: avcodec.h:2771
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:763
#define AV_INPUT_BUFFER_MIN_SIZE
minimum encoding buffer size Used to avoid some checks during header writing.
Definition: avcodec.h:643
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1469
static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
Dispatch function for our custom plugin.
Definition: libxvid.c:239
no search, that is use 0,0 vector whenever one is needed
Definition: avcodec.h:664
reserved for experiments
Definition: avcodec.h:669
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int twopassfd
Definition: libxvid.c:72
#define AV_CODEC_FLAG_4MV
4 MV per MB allowed / advanced prediction for H.263.
Definition: avcodec.h:739
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
int qmax
maximum quantizer
Definition: avcodec.h:2554
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1597
int64_t av_gcd(int64_t a, int64_t b)
Return the greatest common divisor of a and b.
Definition: mathematics.c:55
const char * name
Name of the codec implementation.
Definition: avcodec.h:3479
int me_quality
Motion estimation quality.
Definition: libxvid.c:80
Libavcodec external API header.
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1429
#define OFFSET(x)
Definition: libxvid.c:875
static int xvid_encode_close(AVCodecContext *avctx)
Definition: libxvid.c:848
char * twopassfile
second pass temp file name
Definition: libxvid.c:71
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
static const AVOption options[]
Definition: libxvid.c:877
#define BUFFER_SIZE
Buffer management macros.
Definition: libxvid.c:51
int vop_flags
VOP flags for Xvid encoder.
Definition: libxvid.c:64
int bit_rate
the average bitrate
Definition: avcodec.h:1567
Structure for the private first-pass plugin.
Definition: libxvid.c:86
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:242
#define AV_CODEC_FLAG_QSCALE
Use fixed qscale.
Definition: avcodec.h:735
int variance_aq
Variance adaptive quantization.
Definition: libxvid.c:76
#define MAX_MB_BYTES
Definition: mpegvideo.h:71
#define AV_CODEC_FLAG_AC_PRED
H.263 advanced intra coding / MPEG-4 AC prediction.
Definition: avcodec.h:793
Structure for the private Xvid context.
Definition: libxvid.c:59
int width
picture width / height.
Definition: avcodec.h:1681
static const AVClass xvid_class
Definition: libxvid.c:890
unsigned char * inter_matrix
I-Frame Quant Matrix.
Definition: libxvid.c:74
#define AV_CODEC_FLAG_PASS1
Use internal 2pass ratecontrol in first pass mode.
Definition: avcodec.h:751
int quality
quality (between 1 (good) and FF_LAMBDA_MAX (bad))
Definition: frame.h:283
int mb_decision
macroblock decision mode
Definition: avcodec.h:2054
#define FF_ARRAY_ELEMS(a)
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:3033
int ssim_acc
SSIM accuracy.
Definition: libxvid.c:78
int av_tempfile(const char *prefix, char **filename, int log_offset, void *log_ctx)
Wrapper to work around the lack of mkstemp() on mingw.
Definition: file.c:140
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
#define BUFFER_CAT(x)
Definition: libxvid.c:53
enum AVCodecID codec_id
Definition: avcodec.h:1519
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
main external API structure.
Definition: avcodec.h:1502
int qmin
minimum quantizer
Definition: avcodec.h:2547
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1534
int extradata_size
Definition: avcodec.h:1618
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:2064
Describe the class of an AVClass context structure.
Definition: log.h:67
char * twopassbuffer
Character buffer for two-pass.
Definition: libxvid.c:69
float b_quant_offset
qscale offset between IP and B-frames
Definition: avcodec.h:1804
#define snprintf
Definition: snprintf.h:34
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1782
static av_cold int xvid_encode_init(AVCodecContext *avctx)
Definition: libxvid.c:363
int version
Xvid version.
Definition: libxvid.c:87
static av_always_inline av_const float roundf(float x)
Definition: libm.h:169
uint16_t * inter_matrix
custom inter quantization matrix
Definition: avcodec.h:2071
#define AV_CODEC_FLAG_QPEL
Use qpel MC.
Definition: avcodec.h:747
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
#define AV_CODEC_FLAG_GLOBAL_HEADER
Place global headers in extradata instead of every keyframe.
Definition: avcodec.h:784
int gop_size
the number of pictures in a group of pictures, or 0 for intra_only
Definition: avcodec.h:1707
int ssim
SSIM information display mode.
Definition: libxvid.c:77
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:79
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:280
int vol_flags
VOL flags for Xvid encoder.
Definition: libxvid.c:65
Bi-dir predicted.
Definition: avutil.h:268
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:3024
int den
denominator
Definition: rational.h:45
static int xvid_ff_2pass_create(xvid_plg_create_t *param, void **handle)
Initialize the two-pass plugin and context.
Definition: libxvid.c:110
int trellis
trellis RD quantization
Definition: avcodec.h:2713
static int xvid_ff_2pass_before(struct xvid_context *ref, xvid_plg_data_t *param)
Enable fast encode mode during the first pass.
Definition: libxvid.c:158
#define AV_CODEC_FLAG_PASS2
Use internal 2pass ratecontrol in second pass mode.
Definition: avcodec.h:755
void * encoder_handle
Handle for Xvid encoder.
Definition: libxvid.c:61
void * priv_data
Definition: avcodec.h:1544
#define CODEC_FLAG_GMC
Definition: avcodec.h:961
static int xvid_ff_2pass_after(struct xvid_context *ref, xvid_plg_data_t *param)
Capture statistic data and write it during first pass.
Definition: libxvid.c:202
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:237
#define VE
Definition: libxvid.c:876
#define FF_QP2LAMBDA
factor to convert from H.263 QP to lambda
Definition: avutil.h:219
static int xvid_ff_2pass_destroy(struct xvid_context *ref, xvid_plg_destroy_t *param)
Destroy the two-pass plugin context.
Definition: libxvid.c:141
static void xvid_correct_framerate(AVCodecContext *avctx)
Routine to correct a possibly erroneous framerate being fed to us.
Definition: libxvid.c:313
#define av_freep(p)
#define AV_CODEC_FLAG_CLOSED_GOP
Allow non spec compliant speedup tricks.
Definition: avcodec.h:801
int qscale
Do we use constant scale?
Definition: libxvid.c:67
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:57
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
This structure stores compressed data.
Definition: avcodec.h:1400
Predicted.
Definition: avutil.h:267
int lumi_aq
Lumi masking as an aq method.
Definition: libxvid.c:75