FFmpeg: libavcodec/libxvid.c Source File

FFmpeg
libxvid.c
Go to the documentation of this file.
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");
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  */
151  static 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  */
168  static 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  */
212  static 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  */
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  */
281  static 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  */
323  static 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 
373  static 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  }
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;
501  x->twopassbuffer = av_malloc(BUFFER_SIZE);
502  x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
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
621 FF_DISABLE_DEPRECATION_WARNINGS
622  if (avctx->mpeg_quant)
623  x->mpeg_quant = avctx->mpeg_quant;
624 FF_ENABLE_DEPRECATION_WARNINGS
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 
733  static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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",
785  avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
786  av_reduce(&avctx->sample_aspect_ratio.num, &avctx->sample_aspect_ratio.den,
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;
811  x->old_twopassbuffer = x->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
834 FF_DISABLE_DEPRECATION_WARNINGS
835  avctx->coded_frame->pict_type = pict_type;
836  avctx->coded_frame->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
837 FF_ENABLE_DEPRECATION_WARNINGS
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
844 FF_DISABLE_DEPRECATION_WARNINGS
845  avctx->coded_frame->key_frame = 1;
846 FF_ENABLE_DEPRECATION_WARNINGS
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
854 FF_DISABLE_DEPRECATION_WARNINGS
855  avctx->coded_frame->key_frame = 0;
856 FF_ENABLE_DEPRECATION_WARNINGS
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 
874  static av_cold int xvid_encode_close(AVCodecContext *avctx)
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);
886  av_freep(&x->old_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 
924  AVCodec ff_libxvid_encoder = {
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 |
936  FF_CODEC_CAP_INIT_CLEANUP,
937  .wrapper_name = "libxvid",
938 };
FF_CODEC_CAP_INIT_CLEANUP
#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
NULL
#define NULL
Definition: coverity.c:32
AV_PICTURE_TYPE_S
S(GMC)-VOP MPEG-4.
Definition: avutil.h:277
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
AVOption
AVOption.
Definition: opt.h:246
xvid_context::old_twopassbuffer
char * old_twopassbuffer
Old character buffer (two-pass)
Definition: libxvid.c:76
ff_side_data_set_encoder_stats
int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
Definition: avpacket.c:710
ff_libxvid_encoder
AVCodec ff_libxvid_encoder
Definition: libxvid.c:924
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
AVCodecContext::bit_rate
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1568
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
mem.h
Memory handling functions.
AV_OPT_TYPE_INT
Definition: opt.h:223
AVCodecContext::max_b_frames
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:1777
BUFFER_REMAINING
#define BUFFER_REMAINING(x)
Definition: libxvid.c:58
AVRational::num
int num
Numerator.
Definition: rational.h:59
AVPacket::size
int size
Definition: avcodec.h:1431
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVCodecContext::sample_aspect_ratio
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:1896
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1727
avpriv_tempfile
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
AVCodecContext::stats_in
char * stats_in
pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed he...
Definition: avcodec.h:2540
AV_CODEC_ID_MPEG4
Definition: avcodec.h:230
xvid_context::intra_matrix
unsigned char * intra_matrix
P-Frame Quant Matrix.
Definition: libxvid.c:79
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
xvid_context::ysize
int ysize
Frame y size.
Definition: libxvid.c:69
AVCodec
AVCodec.
Definition: avcodec.h:3408
xvid_context::me_flags
int me_flags
Motion Estimation flags.
Definition: libxvid.c:72
libxvid.h
common functions for use with the Xvid wrappers
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1640
xvid_context::xsize
int xsize
Frame x size.
Definition: libxvid.c:68
AVClass::class_name
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
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
ff_alloc_packet2
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
AV_OPT_TYPE_CONST
Definition: opt.h:232
FF_CODEC_CAP_INIT_THREADSAFE
#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
av_cold
#define av_cold
Definition: attributes.h:82
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:189
opt.h
AVOptions.
xvid_encode_frame
static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *picture, int *got_packet)
Definition: libxvid.c:733
AVCodecContext::b_quant_factor
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:1786
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1618
xvid_context::quicktime_format
int quicktime_format
Are we in a QT-based format?
Definition: libxvid.c:74
file.h
Misc file utilities.
AVPacket::data
uint8_t * data
Definition: avcodec.h:1430
xvid_ff_pass1::context
struct xvid_context * context
Pointer to private context.
Definition: libxvid.c:95
xvid_strip_vol_header
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
size
ptrdiff_t size
Definition: opengl_enc.c:101
av_reduce
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
AVCodecContext::lumi_masking
float lumi_masking
luminance masking (0-> disabled)
Definition: avcodec.h:1836
AVCodecContext::stats_out
char * stats_out
pass1 encoding statistics output buffer
Definition: avcodec.h:2532
AV_CODEC_FLAG_GRAY
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:861
AV_INPUT_BUFFER_MIN_SIZE
#define AV_INPUT_BUFFER_MIN_SIZE
minimum encoding buffer size Used to avoid some checks during header writing.
Definition: avcodec.h:780
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1462
xvid_ff_2pass
static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
Dispatch function for our custom plugin.
Definition: libxvid.c:249
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
xvid_context::twopassfd
int twopassfd
Definition: libxvid.c:78
AV_CODEC_FLAG_4MV
#define AV_CODEC_FLAG_4MV
4 MV per MB allowed / advanced prediction for H.263.
Definition: avcodec.h:837
MAX_MB_BYTES
#define MAX_MB_BYTES
Definition: mpegutils.h:47
AVERROR
#define AVERROR(e)
Definition: error.h:43
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
AVCodecContext::qmax
int qmax
maximum quantizer
Definition: avcodec.h:2362
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1598
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
av_gcd
int64_t av_gcd(int64_t a, int64_t b)
Compute the greatest common divisor of two integer operands.
Definition: mathematics.c:37
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3415
xvid_context::me_quality
int me_quality
Motion estimation quality.
Definition: libxvid.c:86
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1436
OFFSET
#define OFFSET(x)
Definition: libxvid.c:901
xvid_encode_close
static int xvid_encode_close(AVCodecContext *avctx)
Definition: libxvid.c:874
xvid_context::twopassfile
char * twopassfile
second pass temp file name
Definition: libxvid.c:77
internal.h
common internal API header
options
static const AVOption options[]
Definition: libxvid.c:903
BUFFER_SIZE
#define BUFFER_SIZE
Buffer management macros.
Definition: libxvid.c:57
xvid_context::vop_flags
int vop_flags
VOP flags for Xvid encoder.
Definition: libxvid.c:70
xvid_ff_pass1
Structure for the private first-pass plugin.
Definition: libxvid.c:93
AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:301
AV_CODEC_FLAG_QSCALE
#define AV_CODEC_FLAG_QSCALE
Use fixed qscale.
Definition: avcodec.h:833
xvid_context::variance_aq
int variance_aq
Variance adaptive quantization.
Definition: libxvid.c:82
AV_CODEC_FLAG_AC_PRED
#define AV_CODEC_FLAG_AC_PRED
H.263 advanced intra coding / MPEG-4 AC prediction.
Definition: avcodec.h:891
xvid_context
Structure for the private Xvid context.
Definition: libxvid.c:65
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:1690
xvid_class
static const AVClass xvid_class
Definition: libxvid.c:917
xvid_context::inter_matrix
unsigned char * inter_matrix
I-Frame Quant Matrix.
Definition: libxvid.c:80
AV_CODEC_FLAG_PASS1
#define AV_CODEC_FLAG_PASS1
Use internal 2pass ratecontrol in first pass mode.
Definition: avcodec.h:849
AVFrame::quality
int quality
quality (between 1 (good) and FF_LAMBDA_MAX (bad))
Definition: frame.h:341
AVCodecContext::mb_decision
int mb_decision
macroblock decision mode
Definition: avcodec.h:2005
AVCodecContext::height
int height
Definition: avcodec.h:1690
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:36
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2769
xvid_context::ssim_acc
int ssim_acc
SSIM accuracy.
Definition: libxvid.c:84
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
avcodec.h
Libavcodec external API header.
AVCodecContext::mpeg_quant
attribute_deprecated int mpeg_quant
Definition: avcodec.h:1812
BUFFER_CAT
#define BUFFER_CAT(x)
Definition: libxvid.c:59
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:1528
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
AVCodecContext
main external API structure.
Definition: avcodec.h:1518
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:592
AVCodecContext::qmin
int qmin
minimum quantizer
Definition: avcodec.h:2355
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1543
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:1619
AVCodecContext::intra_matrix
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:2015
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
xvid_context::twopassbuffer
char * twopassbuffer
Character buffer for two-pass.
Definition: libxvid.c:75
AVCodecContext::b_quant_offset
float b_quant_offset
qscale offset between IP and B-frames
Definition: avcodec.h:1799
snprintf
#define snprintf
Definition: snprintf.h:34
xvid_encode_init
static av_cold int xvid_encode_init(AVCodecContext *avctx)
Definition: libxvid.c:373
xvid_ff_pass1::version
int version
Xvid version.
Definition: libxvid.c:94
roundf
static av_always_inline av_const float roundf(float x)
Definition: libm.h:451
AVCodecContext::inter_matrix
uint16_t * inter_matrix
custom inter quantization matrix
Definition: avcodec.h:2022
AV_CODEC_FLAG_QPEL
#define AV_CODEC_FLAG_QPEL
Use qpel MC.
Definition: avcodec.h:845
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
AV_CODEC_FLAG_GLOBAL_HEADER
#define AV_CODEC_FLAG_GLOBAL_HEADER
Place global headers in extradata instead of every keyframe.
Definition: avcodec.h:882
xvid_context::mpeg_quant
int mpeg_quant
Quantization type.
Definition: libxvid.c:87
AVCodecContext::gop_size
int gop_size
the number of pictures in a group of pictures, or 0 for intra_only
Definition: avcodec.h:1712
xvid_context::ssim
int ssim
SSIM information display mode.
Definition: libxvid.c:83
int
int
Definition: ffmpeg_filter.c:190
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
internal.h
common internal api header.
if
if(ret< 0)
Definition: vf_mcdeint.c:279
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
xvid_context::vol_flags
int vol_flags
VOL flags for Xvid encoder.
Definition: libxvid.c:71
AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:276
AVCodecContext::coded_frame
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2760
av_init_packet
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
AVRational::den
int den
Denominator.
Definition: rational.h:60
xvid_ff_2pass_create
static int xvid_ff_2pass_create(xvid_plg_create_t *param, void **handle)
Initialize the two-pass plugin and context.
Definition: libxvid.c:120
AVCodecContext::trellis
int trellis
trellis RD quantization
Definition: avcodec.h:2462
xvid_ff_2pass_before
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
AV_CODEC_FLAG_PASS2
#define AV_CODEC_FLAG_PASS2
Use internal 2pass ratecontrol in second pass mode.
Definition: avcodec.h:853
xvid_context::encoder_handle
void * encoder_handle
Handle for Xvid encoder.
Definition: libxvid.c:67
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1545
xvid_ff_2pass_after
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
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
AVFrame::key_frame
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:296
VE
#define VE
Definition: libxvid.c:902
FF_QP2LAMBDA
#define FF_QP2LAMBDA
factor to convert from H.263 QP to lambda
Definition: avutil.h:227
xvid_ff_2pass_destroy
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
xvid_correct_framerate
static void xvid_correct_framerate(AVCodecContext *avctx)
Routine to correct a possibly erroneous framerate being fed to us.
Definition: libxvid.c:323
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
xvid_context::gmc
int gmc
Definition: libxvid.c:85
AV_CODEC_FLAG_CLOSED_GOP
#define AV_CODEC_FLAG_CLOSED_GOP
Definition: avcodec.h:896
xvid_context::qscale
int qscale
Do we use constant scale?
Definition: libxvid.c:73
AVERROR_EXTERNAL
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:57
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1407
AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:275
xvid_context::lumi_aq
int lumi_aq
Lumi masking as an aq method.
Definition: libxvid.c:81
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:26
Generated on Sun May 13 2018 02:03:49 for FFmpeg by   doxygen 1.8.6

AltStyle によって変換されたページ (->オリジナル) /