FFmpeg
libxvid.c
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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  */
65 struct 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  */
93 struct xvid_ff_pass1 {
94  int version; /**< Xvid version */
95  struct xvid_context *context; /**< Pointer to private context */
96 };
97 
98 static int xvid_encode_close(AVCodecContext *avctx);
99 static 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  */
120 static 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");
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  */
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  */
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  */
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 
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  */
249 static 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  */
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  */
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 
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  }
422 
423  /* Decide how we should decide blocks */
424  switch (avctx->mb_decision) {
425  case 2:
426  x->vop_flags |= XVID_VOP_MODEDECISION_RD;
427  x->me_flags |= XVID_ME_HALFPELREFINE8_RD |
428  XVID_ME_QUARTERPELREFINE8_RD |
429  XVID_ME_EXTSEARCH_RD |
430  XVID_ME_CHECKPREDICTION_RD;
431  case 1:
432  if (!(x->vop_flags & XVID_VOP_MODEDECISION_RD))
433  x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
434  x->me_flags |= XVID_ME_HALFPELREFINE16_RD |
435  XVID_ME_QUARTERPELREFINE16_RD;
436  default:
437  break;
438  }
439 
440  /* Bring in VOL flags from ffmpeg command-line */
441  x->vol_flags = 0;
442  if (x->gmc) {
443  x->vol_flags |= XVID_VOL_GMC;
444  x->me_flags |= XVID_ME_GME_REFINE;
445  }
446  if (xvid_flags & AV_CODEC_FLAG_QPEL) {
447  x->vol_flags |= XVID_VOL_QUARTERPEL;
448  x->me_flags |= XVID_ME_QUARTERPELREFINE16;
449  if (x->vop_flags & XVID_VOP_INTER4V)
450  x->me_flags |= XVID_ME_QUARTERPELREFINE8;
451  }
452 
453  xvid_gbl_init.version = XVID_VERSION;
454  xvid_gbl_init.debug = 0;
455  xvid_gbl_init.cpu_flags = 0;
456 
457  /* Initialize */
458  xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
459 
460  /* Create the encoder reference */
461  xvid_enc_create.version = XVID_VERSION;
462 
463  /* Store the desired frame size */
464  xvid_enc_create.width =
465  x->xsize = avctx->width;
466  xvid_enc_create.height =
467  x->ysize = avctx->height;
468 
469  /* Xvid can determine the proper profile to use */
470  /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
471 
472  /* We don't use zones */
473  xvid_enc_create.zones = NULL;
474  xvid_enc_create.num_zones = 0;
475 
476  xvid_enc_create.num_threads = avctx->thread_count;
477 #if (XVID_VERSION <= 0x010303) && (XVID_VERSION >= 0x010300)
478  /* workaround for a bug in libxvidcore */
479  if (avctx->height <= 16) {
480  if (avctx->thread_count < 2) {
481  xvid_enc_create.num_threads = 0;
482  } else {
483  av_log(avctx, AV_LOG_ERROR,
484  "Too small height for threads > 1.");
485  return AVERROR(EINVAL);
486  }
487  }
488 #endif
489 
490  xvid_enc_create.plugins = plugins;
491  xvid_enc_create.num_plugins = 0;
492 
493  /* Initialize Buffers */
494  x->twopassbuffer = NULL;
495  x->old_twopassbuffer = NULL;
496  x->twopassfile = NULL;
497 
498  if (xvid_flags & AV_CODEC_FLAG_PASS1) {
499  rc2pass1.version = XVID_VERSION;
500  rc2pass1.context = x;
503  if (!x->twopassbuffer || !x->old_twopassbuffer) {
504  av_log(avctx, AV_LOG_ERROR,
505  "Xvid: Cannot allocate 2-pass log buffers\n");
506  return AVERROR(ENOMEM);
507  }
508  x->twopassbuffer[0] =
509  x->old_twopassbuffer[0] = 0;
510 
511  plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
512  plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
513  xvid_enc_create.num_plugins++;
514  } else if (xvid_flags & AV_CODEC_FLAG_PASS2) {
515  rc2pass2.version = XVID_VERSION;
516  rc2pass2.bitrate = avctx->bit_rate;
517 
518  fd = avpriv_tempfile("xvidff.", &x->twopassfile, 0, avctx);
519  if (fd < 0) {
520  av_log(avctx, AV_LOG_ERROR, "Xvid: Cannot write 2-pass pipe\n");
521  return fd;
522  }
523  x->twopassfd = fd;
524 
525  if (!avctx->stats_in) {
526  av_log(avctx, AV_LOG_ERROR,
527  "Xvid: No 2-pass information loaded for second pass\n");
528  return AVERROR(EINVAL);
529  }
530 
531  ret = write(fd, avctx->stats_in, strlen(avctx->stats_in));
532  if (ret == -1)
533  ret = AVERROR(errno);
534  else if (strlen(avctx->stats_in) > ret) {
535  av_log(avctx, AV_LOG_ERROR, "Xvid: Cannot write to 2-pass pipe\n");
536  ret = AVERROR(EIO);
537  }
538  if (ret < 0)
539  return ret;
540 
541  rc2pass2.filename = x->twopassfile;
542  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
543  plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
544  xvid_enc_create.num_plugins++;
545  } else if (!(xvid_flags & AV_CODEC_FLAG_QSCALE)) {
546  /* Single Pass Bitrate Control! */
547  single.version = XVID_VERSION;
548  single.bitrate = avctx->bit_rate;
549 
550  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
551  plugins[xvid_enc_create.num_plugins].param = &single;
552  xvid_enc_create.num_plugins++;
553  }
554 
555  if (avctx->lumi_masking != 0.0)
556  x->lumi_aq = 1;
557 
558  /* Luminance Masking */
559  if (x->lumi_aq) {
560  masking_l.method = 0;
561  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
562 
563  /* The old behavior is that when avctx->lumi_masking is specified,
564  * plugins[...].param = NULL. Trying to keep the old behavior here. */
565  plugins[xvid_enc_create.num_plugins].param =
566  avctx->lumi_masking ? NULL : &masking_l;
567  xvid_enc_create.num_plugins++;
568  }
569 
570  /* Variance AQ */
571  if (x->variance_aq) {
572  masking_v.method = 1;
573  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
574  plugins[xvid_enc_create.num_plugins].param = &masking_v;
575  xvid_enc_create.num_plugins++;
576  }
577 
578  if (x->lumi_aq && x->variance_aq )
579  av_log(avctx, AV_LOG_INFO,
580  "Both lumi_aq and variance_aq are enabled. The resulting quality"
581  "will be the worse one of the two effects made by the AQ.\n");
582 
583  /* SSIM */
584  if (x->ssim) {
585  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_ssim;
586  ssim.b_printstat = x->ssim == 2;
587  ssim.acc = x->ssim_acc;
588  ssim.cpu_flags = xvid_gbl_init.cpu_flags;
589  ssim.b_visualize = 0;
590  plugins[xvid_enc_create.num_plugins].param = &ssim;
591  xvid_enc_create.num_plugins++;
592  }
593 
594  /* Frame Rate and Key Frames */
595  xvid_correct_framerate(avctx);
596  xvid_enc_create.fincr = avctx->time_base.num;
597  xvid_enc_create.fbase = avctx->time_base.den;
598  if (avctx->gop_size > 0)
599  xvid_enc_create.max_key_interval = avctx->gop_size;
600  else
601  xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
602 
603  /* Quants */
604  if (xvid_flags & AV_CODEC_FLAG_QSCALE)
605  x->qscale = 1;
606  else
607  x->qscale = 0;
608 
609  xvid_enc_create.min_quant[0] = avctx->qmin;
610  xvid_enc_create.min_quant[1] = avctx->qmin;
611  xvid_enc_create.min_quant[2] = avctx->qmin;
612  xvid_enc_create.max_quant[0] = avctx->qmax;
613  xvid_enc_create.max_quant[1] = avctx->qmax;
614  xvid_enc_create.max_quant[2] = avctx->qmax;
615 
616  /* Quant Matrices */
617  x->intra_matrix =
618  x->inter_matrix = NULL;
619 
620 #if FF_API_PRIVATE_OPT
622  if (avctx->mpeg_quant)
623  x->mpeg_quant = avctx->mpeg_quant;
625 #endif
626 
627  if (x->mpeg_quant)
628  x->vol_flags |= XVID_VOL_MPEGQUANT;
629  if ((avctx->intra_matrix || avctx->inter_matrix)) {
630  x->vol_flags |= XVID_VOL_MPEGQUANT;
631 
632  if (avctx->intra_matrix) {
633  intra = avctx->intra_matrix;
634  x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
635  if (!x->intra_matrix)
636  return AVERROR(ENOMEM);
637  } else
638  intra = NULL;
639  if (avctx->inter_matrix) {
640  inter = avctx->inter_matrix;
641  x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
642  if (!x->inter_matrix)
643  return AVERROR(ENOMEM);
644  } else
645  inter = NULL;
646 
647  for (i = 0; i < 64; i++) {
648  if (intra)
649  x->intra_matrix[i] = (unsigned char) intra[i];
650  if (inter)
651  x->inter_matrix[i] = (unsigned char) inter[i];
652  }
653  }
654 
655  /* Misc Settings */
656  xvid_enc_create.frame_drop_ratio = 0;
657  xvid_enc_create.global = 0;
658  if (xvid_flags & AV_CODEC_FLAG_CLOSED_GOP)
659  xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
660 
661  /* Determines which codec mode we are operating in */
662  avctx->extradata = NULL;
663  avctx->extradata_size = 0;
664  if (xvid_flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
665  /* In this case, we are claiming to be MPEG-4 */
666  x->quicktime_format = 1;
667  avctx->codec_id = AV_CODEC_ID_MPEG4;
668  } else {
669  /* We are claiming to be Xvid */
670  x->quicktime_format = 0;
671  if (!avctx->codec_tag)
672  avctx->codec_tag = AV_RL32("xvid");
673  }
674 
675  /* Bframes */
676  xvid_enc_create.max_bframes = avctx->max_b_frames;
677  xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
678  xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
679  if (avctx->max_b_frames > 0 && !x->quicktime_format)
680  xvid_enc_create.global |= XVID_GLOBAL_PACKED;
681 
682  av_assert0(xvid_enc_create.num_plugins + (!!x->ssim) + (!!x->variance_aq) + (!!x->lumi_aq) <= FF_ARRAY_ELEMS(plugins));
683 
684  /* Encode a dummy frame to get the extradata immediately */
685  if (x->quicktime_format) {
686  AVFrame *picture;
687  AVPacket packet = {0};
688  int size, got_packet, ret;
689 
690  av_init_packet(&packet);
691 
692  picture = av_frame_alloc();
693  if (!picture)
694  return AVERROR(ENOMEM);
695 
696  xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
697  if( xerr ) {
698  av_frame_free(&picture);
699  av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
700  return AVERROR_EXTERNAL;
701  }
702  x->encoder_handle = xvid_enc_create.handle;
703  size = ((avctx->width + 1) & ~1) * ((avctx->height + 1) & ~1);
704  picture->data[0] = av_malloc(size + size / 2);
705  if (!picture->data[0]) {
706  av_frame_free(&picture);
707  return AVERROR(ENOMEM);
708  }
709  picture->data[1] = picture->data[0] + size;
710  picture->data[2] = picture->data[1] + size / 4;
711  memset(picture->data[0], 0, size);
712  memset(picture->data[1], 128, size / 2);
713  ret = xvid_encode_frame(avctx, &packet, picture, &got_packet);
714  if (!ret && got_packet)
715  av_packet_unref(&packet);
716  av_free(picture->data[0]);
717  av_frame_free(&picture);
718  xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
719  }
720 
721  /* Create encoder context */
722  xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
723  if (xerr) {
724  av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
725  return AVERROR_EXTERNAL;
726  }
727 
728  x->encoder_handle = xvid_enc_create.handle;
729 
730  return 0;
731 }
732 
734  const AVFrame *picture, int *got_packet)
735 {
736  int xerr, i, ret, user_packet = !!pkt->data;
737  struct xvid_context *x = avctx->priv_data;
738  int mb_width = (avctx->width + 15) / 16;
739  int mb_height = (avctx->height + 15) / 16;
740  char *tmp;
741 
742  xvid_enc_frame_t xvid_enc_frame = { 0 };
743  xvid_enc_stats_t xvid_enc_stats = { 0 };
744 
745  if ((ret = ff_alloc_packet2(avctx, pkt, mb_width*(int64_t)mb_height*MAX_MB_BYTES + AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)
746  return ret;
747 
748  /* Start setting up the frame */
749  xvid_enc_frame.version = XVID_VERSION;
750  xvid_enc_stats.version = XVID_VERSION;
751 
752  /* Let Xvid know where to put the frame. */
753  xvid_enc_frame.bitstream = pkt->data;
754  xvid_enc_frame.length = pkt->size;
755 
756  /* Initialize input image fields */
757  if (avctx->pix_fmt != AV_PIX_FMT_YUV420P) {
758  av_log(avctx, AV_LOG_ERROR,
759  "Xvid: Color spaces other than 420P not supported\n");
760  return AVERROR(EINVAL);
761  }
762 
763  xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
764 
765  for (i = 0; i < 4; i++) {
766  xvid_enc_frame.input.plane[i] = picture->data[i];
767  xvid_enc_frame.input.stride[i] = picture->linesize[i];
768  }
769 
770  /* Encoder Flags */
771  xvid_enc_frame.vop_flags = x->vop_flags;
772  xvid_enc_frame.vol_flags = x->vol_flags;
773  xvid_enc_frame.motion = x->me_flags;
774  xvid_enc_frame.type =
775  picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
776  picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
777  picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
778  XVID_TYPE_AUTO;
779 
780  /* Pixel aspect ratio setting */
781  if (avctx->sample_aspect_ratio.num < 0 || avctx->sample_aspect_ratio.num > 255 ||
782  avctx->sample_aspect_ratio.den < 0 || avctx->sample_aspect_ratio.den > 255) {
783  av_log(avctx, AV_LOG_WARNING,
784  "Invalid pixel aspect ratio %i/%i, limit is 255/255 reducing\n",
787  avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 255);
788  }
789  xvid_enc_frame.par = XVID_PAR_EXT;
790  xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
791  xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
792 
793  /* Quant Setting */
794  if (x->qscale)
795  xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
796  else
797  xvid_enc_frame.quant = 0;
798 
799  /* Matrices */
800  xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
801  xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
802 
803  /* Encode */
804  xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
805  &xvid_enc_frame, &xvid_enc_stats);
806 
807  /* Two-pass log buffer swapping */
808  avctx->stats_out = NULL;
809  if (x->twopassbuffer) {
810  tmp = x->old_twopassbuffer;
812  x->twopassbuffer = tmp;
813  x->twopassbuffer[0] = 0;
814  if (x->old_twopassbuffer[0] != 0) {
815  avctx->stats_out = x->old_twopassbuffer;
816  }
817  }
818 
819  if (xerr > 0) {
820  int pict_type;
821 
822  *got_packet = 1;
823 
824  if (xvid_enc_stats.type == XVID_TYPE_PVOP)
825  pict_type = AV_PICTURE_TYPE_P;
826  else if (xvid_enc_stats.type == XVID_TYPE_BVOP)
827  pict_type = AV_PICTURE_TYPE_B;
828  else if (xvid_enc_stats.type == XVID_TYPE_SVOP)
829  pict_type = AV_PICTURE_TYPE_S;
830  else
831  pict_type = AV_PICTURE_TYPE_I;
832 
833 #if FF_API_CODED_FRAME
835  avctx->coded_frame->pict_type = pict_type;
836  avctx->coded_frame->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
838 #endif
839 
840  ff_side_data_set_encoder_stats(pkt, xvid_enc_stats.quant * FF_QP2LAMBDA, NULL, 0, pict_type);
841 
842  if (xvid_enc_frame.out_flags & XVID_KEYFRAME) {
843 #if FF_API_CODED_FRAME
845  avctx->coded_frame->key_frame = 1;
847 #endif
848  pkt->flags |= AV_PKT_FLAG_KEY;
849  if (x->quicktime_format)
850  return xvid_strip_vol_header(avctx, pkt,
851  xvid_enc_stats.hlength, xerr);
852  } else {
853 #if FF_API_CODED_FRAME
855  avctx->coded_frame->key_frame = 0;
857 #endif
858  }
859 
860  pkt->size = xerr;
861 
862  return 0;
863  } else {
864  if (!user_packet)
865  av_packet_unref(pkt);
866  if (!xerr)
867  return 0;
868  av_log(avctx, AV_LOG_ERROR,
869  "Xvid: Encoding Error Occurred: %i\n", xerr);
870  return AVERROR_EXTERNAL;
871  }
872 }
873 
875 {
876  struct xvid_context *x = avctx->priv_data;
877 
878  if (x->encoder_handle) {
879  xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
880  x->encoder_handle = NULL;
881  }
882 
883  av_freep(&avctx->extradata);
884  if (x->twopassbuffer) {
885  av_freep(&x->twopassbuffer);
887  avctx->stats_out = NULL;
888  }
889  if (x->twopassfd>=0) {
890  unlink(x->twopassfile);
891  close(x->twopassfd);
892  x->twopassfd = -1;
893  }
894  av_freep(&x->twopassfile);
895  av_freep(&x->intra_matrix);
896  av_freep(&x->inter_matrix);
897 
898  return 0;
899 }
900 
901 #define OFFSET(x) offsetof(struct xvid_context, x)
902 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
903 static const AVOption options[] = {
904  { "lumi_aq", "Luminance masking AQ", OFFSET(lumi_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
905  { "variance_aq", "Variance AQ", OFFSET(variance_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
906  { "ssim", "Show SSIM information to stdout", OFFSET(ssim), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, VE, "ssim" },
907  { "off", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "ssim" },
908  { "avg", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "ssim" },
909  { "frame", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "ssim" },
910  { "ssim_acc", "SSIM accuracy", OFFSET(ssim_acc), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, 4, VE },
911  { "gmc", "use GMC", OFFSET(gmc), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
912  { "me_quality", "Motion estimation quality", OFFSET(me_quality), AV_OPT_TYPE_INT, { .i64 = 4 }, 0, 6, VE },
913  { "mpeg_quant", "Use MPEG quantizers instead of H.263", OFFSET(mpeg_quant), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
914  { NULL },
915 };
916 
917 static const AVClass xvid_class = {
918  .class_name = "libxvid",
919  .item_name = av_default_item_name,
920  .option = options,
921  .version = LIBAVUTIL_VERSION_INT,
922 };
923 
925  .name = "libxvid",
926  .long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
927  .type = AVMEDIA_TYPE_VIDEO,
928  .id = AV_CODEC_ID_MPEG4,
929  .priv_data_size = sizeof(struct xvid_context),
930  .init = xvid_encode_init,
931  .encode2 = xvid_encode_frame,
932  .close = xvid_encode_close,
933  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
934  .priv_class = &xvid_class,
935  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
937  .wrapper_name = "libxvid",
938 };
#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 MPEG-4.
Definition: avutil.h:277
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVOption.
Definition: opt.h:246
char * old_twopassbuffer
Old character buffer (two-pass)
Definition: libxvid.c:76
int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
Definition: avpacket.c:720
AVCodec ff_libxvid_encoder
Definition: libxvid.c:924
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1618
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
Memory handling functions.
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:1828
#define BUFFER_REMAINING(x)
Definition: libxvid.c:58
int num
Numerator.
Definition: rational.h:59
int size
Definition: avcodec.h:1481
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
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:1947
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1778
int avpriv_tempfile(const char *prefix, char **filename, int log_offset, void *log_ctx)
Wrapper to work around the lack of mkstemp() on mingw.
Definition: file_open.c:110
char * stats_in
pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed he...
Definition: avcodec.h:2595
unsigned char * intra_matrix
P-Frame Quant Matrix.
Definition: libxvid.c:79
static AVPacket pkt
int ysize
Frame y size.
Definition: libxvid.c:69
AVCodec.
Definition: avcodec.h:3492
int me_flags
Motion Estimation flags.
Definition: libxvid.c:72
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:1691
int xsize
Frame x size.
Definition: libxvid.c:68
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
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: encode.c:32
#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:82
#define av_malloc(s)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:189
AVOptions.
static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *picture, int *got_packet)
Definition: libxvid.c:733
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:1837
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1669
int quicktime_format
Are we in a QT-based format?
Definition: libxvid.c:74
Misc file utilities.
uint8_t * data
Definition: avcodec.h:1480
struct xvid_context * context
Pointer to private context.
Definition: libxvid.c:95
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:281
ptrdiff_t size
Definition: opengl_enc.c:100
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
float lumi_masking
luminance masking (0-> disabled)
Definition: avcodec.h:1887
char * stats_out
pass1 encoding statistics output buffer
Definition: avcodec.h:2587
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:886
#define AV_INPUT_BUFFER_MIN_SIZE
minimum encoding buffer size Used to avoid some checks during header writing.
Definition: avcodec.h:800
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1512
static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
Dispatch function for our custom plugin.
Definition: libxvid.c:249
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int twopassfd
Definition: libxvid.c:78
#define AV_CODEC_FLAG_4MV
4 MV per MB allowed / advanced prediction for H.263.
Definition: avcodec.h:857
#define MAX_MB_BYTES
Definition: mpegutils.h:47
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
int qmax
maximum quantizer
Definition: avcodec.h:2417
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1648
simple assert() macros that are a bit more flexible than ISO C assert().
int64_t av_gcd(int64_t a, int64_t b)
Compute the greatest common divisor of two integer operands.
Definition: mathematics.c:37
const char * name
Name of the codec implementation.
Definition: avcodec.h:3499
int me_quality
Motion estimation quality.
Definition: libxvid.c:86
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1486
#define OFFSET(x)
Definition: libxvid.c:901
static int xvid_encode_close(AVCodecContext *avctx)
Definition: libxvid.c:874
char * twopassfile
second pass temp file name
Definition: libxvid.c:77
common internal API header
static const AVOption options[]
Definition: libxvid.c:903
#define BUFFER_SIZE
Buffer management macros.
Definition: libxvid.c:57
int vop_flags
VOP flags for Xvid encoder.
Definition: libxvid.c:70
Structure for the private first-pass plugin.
Definition: libxvid.c:93
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:378
#define AV_CODEC_FLAG_QSCALE
Use fixed qscale.
Definition: avcodec.h:853
int variance_aq
Variance adaptive quantization.
Definition: libxvid.c:82
#define AV_CODEC_FLAG_AC_PRED
H.263 advanced intra coding / MPEG-4 AC prediction.
Definition: avcodec.h:916
Structure for the private Xvid context.
Definition: libxvid.c:65
int width
picture width / height.
Definition: avcodec.h:1741
static const AVClass xvid_class
Definition: libxvid.c:917
unsigned char * inter_matrix
I-Frame Quant Matrix.
Definition: libxvid.c:80
#define AV_CODEC_FLAG_PASS1
Use internal 2pass ratecontrol in first pass mode.
Definition: avcodec.h:874
int quality
quality (between 1 (good) and FF_LAMBDA_MAX (bad))
Definition: frame.h:418
int mb_decision
macroblock decision mode
Definition: avcodec.h:2056
#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:2827
if(ret)
int ssim_acc
SSIM accuracy.
Definition: libxvid.c:84
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
Libavcodec external API header.
attribute_deprecated int mpeg_quant
Definition: avcodec.h:1863
#define BUFFER_CAT(x)
Definition: libxvid.c:59
enum AVCodecID codec_id
Definition: avcodec.h:1578
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
main external API structure.
Definition: avcodec.h:1568
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:599
int qmin
minimum quantizer
Definition: avcodec.h:2410
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> (&#39;D&#39;<<24) + (&#39;C&#39;<<16) + (&#39;B&#39;<<8) + &#39;A&#39;).
Definition: avcodec.h:1593
int extradata_size
Definition: avcodec.h:1670
uint16_t * intra_matrix
custom intra quantization matrix Must be allocated with the av_malloc() family of functions...
Definition: avcodec.h:2068
Describe the class of an AVClass context structure.
Definition: log.h:67
char * twopassbuffer
Character buffer for two-pass.
Definition: libxvid.c:75
float b_quant_offset
qscale offset between IP and B-frames
Definition: avcodec.h:1850
#define snprintf
Definition: snprintf.h:34
static av_cold int xvid_encode_init(AVCodecContext *avctx)
Definition: libxvid.c:373
int version
Xvid version.
Definition: libxvid.c:94
static av_always_inline av_const float roundf(float x)
Definition: libm.h:451
uint16_t * inter_matrix
custom inter quantization matrix Must be allocated with the av_malloc() family of functions...
Definition: avcodec.h:2077
#define AV_CODEC_FLAG_QPEL
Use qpel MC.
Definition: avcodec.h:865
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
#define AV_CODEC_FLAG_GLOBAL_HEADER
Place global headers in extradata instead of every keyframe.
Definition: avcodec.h:907
int mpeg_quant
Quantization type.
Definition: libxvid.c:87
int gop_size
the number of pictures in a group of pictures, or 0 for intra_only
Definition: avcodec.h:1763
int ssim
SSIM information display mode.
Definition: libxvid.c:83
int
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
common internal api header.
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
int vol_flags
VOL flags for Xvid encoder.
Definition: libxvid.c:71
Bi-dir predicted.
Definition: avutil.h:276
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2818
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
int den
Denominator.
Definition: rational.h:60
static int xvid_ff_2pass_create(xvid_plg_create_t *param, void **handle)
Initialize the two-pass plugin and context.
Definition: libxvid.c:120
int trellis
trellis RD quantization
Definition: avcodec.h:2517
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:168
#define AV_CODEC_FLAG_PASS2
Use internal 2pass ratecontrol in second pass mode.
Definition: avcodec.h:878
void * encoder_handle
Handle for Xvid encoder.
Definition: libxvid.c:67
void * priv_data
Definition: avcodec.h:1595
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:212
#define av_free(p)
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:373
#define VE
Definition: libxvid.c:902
#define FF_QP2LAMBDA
factor to convert from H.263 QP to lambda
Definition: avutil.h:227
static int xvid_ff_2pass_destroy(struct xvid_context *ref, xvid_plg_destroy_t *param)
Destroy the two-pass plugin context.
Definition: libxvid.c:151
static void xvid_correct_framerate(AVCodecContext *avctx)
Routine to correct a possibly erroneous framerate being fed to us.
Definition: libxvid.c:323
#define av_freep(p)
#define AV_CODEC_FLAG_CLOSED_GOP
Definition: avcodec.h:921
int qscale
Do we use constant scale?
Definition: libxvid.c:73
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
#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:64
This structure stores compressed data.
Definition: avcodec.h:1457
Predicted.
Definition: avutil.h:275
int lumi_aq
Lumi masking as an aq method.
Definition: libxvid.c:81
static uint8_t tmp[11]
Definition: aes_ctr.c:26