Libav
libxvid.c
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1 /*
2  * Interface to xvidcore for mpeg4 encoding
3  * Copyright (c) 2004 Adam Thayer <krevnik@comcast.net>
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
28 #include <xvid.h>
29 #include <unistd.h>
30 #include "avcodec.h"
31 #include "libavutil/cpu.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/mathematics.h"
34 #include "libxvid.h"
35 #include "mpegvideo.h"
36 
40 #define BUFFER_SIZE 1024
41 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
42 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
43 
48 struct xvid_context {
50  int xsize;
51  int ysize;
52  int vop_flags;
53  int vol_flags;
54  int me_flags;
55  int qscale;
57  char *twopassbuffer;
59  char *twopassfile;
60  unsigned char *intra_matrix;
61  unsigned char *inter_matrix;
62 };
63 
67 struct xvid_ff_pass1 {
68  int version;
70 };
71 
72 /*
73  * Xvid 2-Pass Kludge Section
74  *
75  * Xvid's default 2-pass doesn't allow us to create data as we need to, so
76  * this section spends time replacing the first pass plugin so we can write
77  * statistic information as libavcodec requests in. We have another kludge
78  * that allows us to pass data to the second pass in Xvid without a custom
79  * rate-control plugin.
80  */
81 
89 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
90  void ** handle) {
91  struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
92  char *log = x->context->twopassbuffer;
93 
94  /* Do a quick bounds check */
95  if( log == NULL )
96  return XVID_ERR_FAIL;
97 
98  /* We use snprintf() */
99  /* This is because we can safely prevent a buffer overflow */
100  log[0] = 0;
101  snprintf(log, BUFFER_REMAINING(log),
102  "# avconv 2-pass log file, using xvid codec\n");
103  snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
104  "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
105  XVID_VERSION_MAJOR(XVID_VERSION),
106  XVID_VERSION_MINOR(XVID_VERSION),
107  XVID_VERSION_PATCH(XVID_VERSION));
108 
109  *handle = x->context;
110  return 0;
111 }
112 
120 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
121  xvid_plg_destroy_t *param) {
122  /* Currently cannot think of anything to do on destruction */
123  /* Still, the framework should be here for reference/use */
124  if( ref->twopassbuffer != NULL )
125  ref->twopassbuffer[0] = 0;
126  return 0;
127 }
128 
136 static int xvid_ff_2pass_before(struct xvid_context *ref,
137  xvid_plg_data_t *param) {
138  int motion_remove;
139  int motion_replacements;
140  int vop_remove;
141 
142  /* Nothing to do here, result is changed too much */
143  if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
144  return 0;
145 
146  /* We can implement a 'turbo' first pass mode here */
147  param->quant = 2;
148 
149  /* Init values */
150  motion_remove = ~XVID_ME_CHROMA_PVOP &
151  ~XVID_ME_CHROMA_BVOP &
152  ~XVID_ME_EXTSEARCH16 &
153  ~XVID_ME_ADVANCEDDIAMOND16;
154  motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
155  XVID_ME_SKIP_DELTASEARCH |
156  XVID_ME_FASTREFINE16 |
157  XVID_ME_BFRAME_EARLYSTOP;
158  vop_remove = ~XVID_VOP_MODEDECISION_RD &
159  ~XVID_VOP_FAST_MODEDECISION_RD &
160  ~XVID_VOP_TRELLISQUANT &
161  ~XVID_VOP_INTER4V &
162  ~XVID_VOP_HQACPRED;
163 
164  param->vol_flags &= ~XVID_VOL_GMC;
165  param->vop_flags &= vop_remove;
166  param->motion_flags &= motion_remove;
167  param->motion_flags |= motion_replacements;
168 
169  return 0;
170 }
171 
179 static int xvid_ff_2pass_after(struct xvid_context *ref,
180  xvid_plg_data_t *param) {
181  char *log = ref->twopassbuffer;
182  const char *frame_types = " ipbs";
183  char frame_type;
184 
185  /* Quick bounds check */
186  if( log == NULL )
187  return XVID_ERR_FAIL;
188 
189  /* Convert the type given to us into a character */
190  if( param->type < 5 && param->type > 0 ) {
191  frame_type = frame_types[param->type];
192  } else {
193  return XVID_ERR_FAIL;
194  }
195 
196  snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
197  "%c %d %d %d %d %d %d\n",
198  frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
199  param->stats.ublks, param->stats.length, param->stats.hlength);
200 
201  return 0;
202 }
203 
215 static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
216 {
217  switch( cmd ) {
218  case XVID_PLG_INFO:
219  case XVID_PLG_FRAME:
220  return 0;
221 
222  case XVID_PLG_BEFORE:
223  return xvid_ff_2pass_before(ref, p1);
224 
225  case XVID_PLG_CREATE:
226  return xvid_ff_2pass_create(p1, p2);
227 
228  case XVID_PLG_AFTER:
229  return xvid_ff_2pass_after(ref, p1);
230 
231  case XVID_PLG_DESTROY:
232  return xvid_ff_2pass_destroy(ref, p1);
233 
234  default:
235  return XVID_ERR_FAIL;
236  }
237 }
238 
253  AVPacket *pkt,
254  unsigned int header_len,
255  unsigned int frame_len) {
256  int vo_len = 0, i;
257 
258  for( i = 0; i < header_len - 3; i++ ) {
259  if( pkt->data[i] == 0x00 &&
260  pkt->data[i+1] == 0x00 &&
261  pkt->data[i+2] == 0x01 &&
262  pkt->data[i+3] == 0xB6 ) {
263  vo_len = i;
264  break;
265  }
266  }
267 
268  if( vo_len > 0 ) {
269  /* We need to store the header, so extract it */
270  if( avctx->extradata == NULL ) {
271  avctx->extradata = av_malloc(vo_len);
272  memcpy(avctx->extradata, pkt->data, vo_len);
273  avctx->extradata_size = vo_len;
274  }
275  /* Less dangerous now, memmove properly copies the two
276  chunks of overlapping data */
277  memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
278  pkt->size = frame_len - vo_len;
279  }
280  return 0;
281 }
282 
293 {
294  int frate, fbase;
295  int est_frate, est_fbase;
296  int gcd;
297  float est_fps, fps;
298 
299  frate = avctx->time_base.den;
300  fbase = avctx->time_base.num;
301 
302  gcd = av_gcd(frate, fbase);
303  if( gcd > 1 ) {
304  frate /= gcd;
305  fbase /= gcd;
306  }
307 
308  if( frate <= 65000 && fbase <= 65000 ) {
309  avctx->time_base.den = frate;
310  avctx->time_base.num = fbase;
311  return;
312  }
313 
314  fps = (float)frate / (float)fbase;
315  est_fps = roundf(fps * 1000.0) / 1000.0;
316 
317  est_frate = (int)est_fps;
318  if( est_fps > (int)est_fps ) {
319  est_frate = (est_frate + 1) * 1000;
320  est_fbase = (int)roundf((float)est_frate / est_fps);
321  } else
322  est_fbase = 1;
323 
324  gcd = av_gcd(est_frate, est_fbase);
325  if( gcd > 1 ) {
326  est_frate /= gcd;
327  est_fbase /= gcd;
328  }
329 
330  if( fbase > est_fbase ) {
331  avctx->time_base.den = est_frate;
332  avctx->time_base.num = est_fbase;
333  av_log(avctx, AV_LOG_DEBUG,
334  "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
335  est_fps, (((est_fps - fps)/fps) * 100.0));
336  } else {
337  avctx->time_base.den = frate;
338  avctx->time_base.num = fbase;
339  }
340 }
341 
343  int xerr, i;
344  int xvid_flags = avctx->flags;
345  struct xvid_context *x = avctx->priv_data;
346  uint16_t *intra, *inter;
347  int fd;
348 
349  xvid_plugin_single_t single = { 0 };
350  struct xvid_ff_pass1 rc2pass1 = { 0 };
351  xvid_plugin_2pass2_t rc2pass2 = { 0 };
352  xvid_gbl_init_t xvid_gbl_init = { 0 };
353  xvid_enc_create_t xvid_enc_create = { 0 };
354  xvid_enc_plugin_t plugins[7];
355 
356  /* Bring in VOP flags from avconv command-line */
357  x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
358  if( xvid_flags & CODEC_FLAG_4MV )
359  x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
360  if( avctx->trellis
361  )
362  x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
363  if( xvid_flags & CODEC_FLAG_AC_PRED )
364  x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
365  if( xvid_flags & CODEC_FLAG_GRAY )
366  x->vop_flags |= XVID_VOP_GREYSCALE;
367 
368  /* Decide which ME quality setting to use */
369  x->me_flags = 0;
370  switch( avctx->me_method ) {
371  case ME_FULL: /* Quality 6 */
372  x->me_flags |= XVID_ME_EXTSEARCH16
373  | XVID_ME_EXTSEARCH8;
374 
375  case ME_EPZS: /* Quality 4 */
376  x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
377  | XVID_ME_HALFPELREFINE8
378  | XVID_ME_CHROMA_PVOP
379  | XVID_ME_CHROMA_BVOP;
380 
381  case ME_LOG: /* Quality 2 */
382  case ME_PHODS:
383  case ME_X1:
384  x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
385  | XVID_ME_HALFPELREFINE16;
386 
387  case ME_ZERO: /* Quality 0 */
388  default:
389  break;
390  }
391 
392  /* Decide how we should decide blocks */
393  switch( avctx->mb_decision ) {
394  case 2:
395  x->vop_flags |= XVID_VOP_MODEDECISION_RD;
396  x->me_flags |= XVID_ME_HALFPELREFINE8_RD
397  | XVID_ME_QUARTERPELREFINE8_RD
398  | XVID_ME_EXTSEARCH_RD
399  | XVID_ME_CHECKPREDICTION_RD;
400  case 1:
401  if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
402  x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
403  x->me_flags |= XVID_ME_HALFPELREFINE16_RD
404  | XVID_ME_QUARTERPELREFINE16_RD;
405 
406  default:
407  break;
408  }
409 
410  /* Bring in VOL flags from avconv command-line */
411  x->vol_flags = 0;
412  if( xvid_flags & CODEC_FLAG_GMC ) {
413  x->vol_flags |= XVID_VOL_GMC;
414  x->me_flags |= XVID_ME_GME_REFINE;
415  }
416  if( xvid_flags & CODEC_FLAG_QPEL ) {
417  x->vol_flags |= XVID_VOL_QUARTERPEL;
418  x->me_flags |= XVID_ME_QUARTERPELREFINE16;
419  if( x->vop_flags & XVID_VOP_INTER4V )
420  x->me_flags |= XVID_ME_QUARTERPELREFINE8;
421  }
422 
423  xvid_gbl_init.version = XVID_VERSION;
424  xvid_gbl_init.debug = 0;
425 
426 #if ARCH_PPC
427  /* Xvid's PPC support is borked, use libavcodec to detect */
428 #if HAVE_ALTIVEC
430  xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
431  } else
432 #endif
433  xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
434 #else
435  /* Xvid can detect on x86 */
436  xvid_gbl_init.cpu_flags = 0;
437 #endif
438 
439  /* Initialize */
440  xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
441 
442  /* Create the encoder reference */
443  xvid_enc_create.version = XVID_VERSION;
444 
445  /* Store the desired frame size */
446  xvid_enc_create.width = x->xsize = avctx->width;
447  xvid_enc_create.height = x->ysize = avctx->height;
448 
449  /* Xvid can determine the proper profile to use */
450  /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
451 
452  /* We don't use zones */
453  xvid_enc_create.zones = NULL;
454  xvid_enc_create.num_zones = 0;
455 
456  xvid_enc_create.num_threads = avctx->thread_count;
457 
458  xvid_enc_create.plugins = plugins;
459  xvid_enc_create.num_plugins = 0;
460 
461  /* Initialize Buffers */
462  x->twopassbuffer = NULL;
463  x->old_twopassbuffer = NULL;
464  x->twopassfile = NULL;
465 
466  if( xvid_flags & CODEC_FLAG_PASS1 ) {
467  rc2pass1.version = XVID_VERSION;
468  rc2pass1.context = x;
471  if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
472  av_log(avctx, AV_LOG_ERROR,
473  "Xvid: Cannot allocate 2-pass log buffers\n");
474  return -1;
475  }
476  x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
477 
478  plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
479  plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
480  xvid_enc_create.num_plugins++;
481  } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
482  rc2pass2.version = XVID_VERSION;
483  rc2pass2.bitrate = avctx->bit_rate;
484 
485  fd = ff_tempfile("xvidff.", &x->twopassfile);
486  if( fd == -1 ) {
487  av_log(avctx, AV_LOG_ERROR,
488  "Xvid: Cannot write 2-pass pipe\n");
489  return -1;
490  }
491 
492  if( avctx->stats_in == NULL ) {
493  av_log(avctx, AV_LOG_ERROR,
494  "Xvid: No 2-pass information loaded for second pass\n");
495  return -1;
496  }
497 
498  if( strlen(avctx->stats_in) >
499  write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
500  close(fd);
501  av_log(avctx, AV_LOG_ERROR,
502  "Xvid: Cannot write to 2-pass pipe\n");
503  return -1;
504  }
505 
506  close(fd);
507  rc2pass2.filename = x->twopassfile;
508  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
509  plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
510  xvid_enc_create.num_plugins++;
511  } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
512  /* Single Pass Bitrate Control! */
513  single.version = XVID_VERSION;
514  single.bitrate = avctx->bit_rate;
515 
516  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
517  plugins[xvid_enc_create.num_plugins].param = &single;
518  xvid_enc_create.num_plugins++;
519  }
520 
521  /* Luminance Masking */
522  if( 0.0 != avctx->lumi_masking ) {
523  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
524  plugins[xvid_enc_create.num_plugins].param = NULL;
525  xvid_enc_create.num_plugins++;
526  }
527 
528  /* Frame Rate and Key Frames */
529  xvid_correct_framerate(avctx);
530  xvid_enc_create.fincr = avctx->time_base.num;
531  xvid_enc_create.fbase = avctx->time_base.den;
532  if( avctx->gop_size > 0 )
533  xvid_enc_create.max_key_interval = avctx->gop_size;
534  else
535  xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
536 
537  /* Quants */
538  if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
539  else x->qscale = 0;
540 
541  xvid_enc_create.min_quant[0] = avctx->qmin;
542  xvid_enc_create.min_quant[1] = avctx->qmin;
543  xvid_enc_create.min_quant[2] = avctx->qmin;
544  xvid_enc_create.max_quant[0] = avctx->qmax;
545  xvid_enc_create.max_quant[1] = avctx->qmax;
546  xvid_enc_create.max_quant[2] = avctx->qmax;
547 
548  /* Quant Matrices */
549  x->intra_matrix = x->inter_matrix = NULL;
550  if( avctx->mpeg_quant )
551  x->vol_flags |= XVID_VOL_MPEGQUANT;
552  if( (avctx->intra_matrix || avctx->inter_matrix) ) {
553  x->vol_flags |= XVID_VOL_MPEGQUANT;
554 
555  if( avctx->intra_matrix ) {
556  intra = avctx->intra_matrix;
557  x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
558  } else
559  intra = NULL;
560  if( avctx->inter_matrix ) {
561  inter = avctx->inter_matrix;
562  x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
563  } else
564  inter = NULL;
565 
566  for( i = 0; i < 64; i++ ) {
567  if( intra )
568  x->intra_matrix[i] = (unsigned char)intra[i];
569  if( inter )
570  x->inter_matrix[i] = (unsigned char)inter[i];
571  }
572  }
573 
574  /* Misc Settings */
575  xvid_enc_create.frame_drop_ratio = 0;
576  xvid_enc_create.global = 0;
577  if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
578  xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
579 
580  /* Determines which codec mode we are operating in */
581  avctx->extradata = NULL;
582  avctx->extradata_size = 0;
583  if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
584  /* In this case, we are claiming to be MPEG4 */
585  x->quicktime_format = 1;
586  avctx->codec_id = AV_CODEC_ID_MPEG4;
587  } else {
588  /* We are claiming to be Xvid */
589  x->quicktime_format = 0;
590  if(!avctx->codec_tag)
591  avctx->codec_tag = AV_RL32("xvid");
592  }
593 
594  /* Bframes */
595  xvid_enc_create.max_bframes = avctx->max_b_frames;
596  xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
597  xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
598  if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
599 
600  /* Create encoder context */
601  xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
602  if( xerr ) {
603  av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
604  return -1;
605  }
606 
607  x->encoder_handle = xvid_enc_create.handle;
608  avctx->coded_frame = av_frame_alloc();
609  if (!avctx->coded_frame)
610  return AVERROR(ENOMEM);
611 
612  return 0;
613 }
614 
615 static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
616  const AVFrame *picture, int *got_packet)
617 {
618  int xerr, i, ret, user_packet = !!pkt->data;
619  char *tmp;
620  struct xvid_context *x = avctx->priv_data;
621  AVFrame *p = avctx->coded_frame;
622  int mb_width = (avctx->width + 15) / 16;
623  int mb_height = (avctx->height + 15) / 16;
624 
625  xvid_enc_frame_t xvid_enc_frame = { 0 };
626  xvid_enc_stats_t xvid_enc_stats = { 0 };
627 
628  if (!user_packet &&
629  (ret = av_new_packet(pkt, mb_width*mb_height*MAX_MB_BYTES + FF_MIN_BUFFER_SIZE)) < 0) {
630  av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
631  return ret;
632  }
633 
634  /* Start setting up the frame */
635  xvid_enc_frame.version = XVID_VERSION;
636  xvid_enc_stats.version = XVID_VERSION;
637 
638  /* Let Xvid know where to put the frame. */
639  xvid_enc_frame.bitstream = pkt->data;
640  xvid_enc_frame.length = pkt->size;
641 
642  /* Initialize input image fields */
643  if( avctx->pix_fmt != AV_PIX_FMT_YUV420P ) {
644  av_log(avctx, AV_LOG_ERROR, "Xvid: Color spaces other than 420p not supported\n");
645  return -1;
646  }
647 
648  xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
649 
650  for( i = 0; i < 4; i++ ) {
651  xvid_enc_frame.input.plane[i] = picture->data[i];
652  xvid_enc_frame.input.stride[i] = picture->linesize[i];
653  }
654 
655  /* Encoder Flags */
656  xvid_enc_frame.vop_flags = x->vop_flags;
657  xvid_enc_frame.vol_flags = x->vol_flags;
658  xvid_enc_frame.motion = x->me_flags;
659  xvid_enc_frame.type =
660  picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
661  picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
662  picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
663  XVID_TYPE_AUTO;
664 
665  /* Pixel aspect ratio setting */
666  if (avctx->sample_aspect_ratio.num < 1 || avctx->sample_aspect_ratio.num > 255 ||
667  avctx->sample_aspect_ratio.den < 1 || avctx->sample_aspect_ratio.den > 255) {
668  av_log(avctx, AV_LOG_ERROR, "Invalid pixel aspect ratio %i/%i\n",
670  return -1;
671  }
672  xvid_enc_frame.par = XVID_PAR_EXT;
673  xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
674  xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
675 
676  /* Quant Setting */
677  if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
678  else xvid_enc_frame.quant = 0;
679 
680  /* Matrices */
681  xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
682  xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
683 
684  /* Encode */
685  xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
686  &xvid_enc_frame, &xvid_enc_stats);
687 
688  /* Two-pass log buffer swapping */
689  avctx->stats_out = NULL;
690  if( x->twopassbuffer ) {
691  tmp = x->old_twopassbuffer;
693  x->twopassbuffer = tmp;
694  x->twopassbuffer[0] = 0;
695  if( x->old_twopassbuffer[0] != 0 ) {
696  avctx->stats_out = x->old_twopassbuffer;
697  }
698  }
699 
700  if (xerr > 0) {
701  *got_packet = 1;
702 
703  p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
704  if( xvid_enc_stats.type == XVID_TYPE_PVOP )
706  else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
708  else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
710  else
712  if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
713  p->key_frame = 1;
714  pkt->flags |= AV_PKT_FLAG_KEY;
715  if( x->quicktime_format )
716  return xvid_strip_vol_header(avctx, pkt,
717  xvid_enc_stats.hlength, xerr);
718  } else
719  p->key_frame = 0;
720 
721  pkt->size = xerr;
722 
723  return 0;
724  } else {
725  if (!user_packet)
726  av_free_packet(pkt);
727  if (!xerr)
728  return 0;
729  av_log(avctx, AV_LOG_ERROR, "Xvid: Encoding Error Occurred: %i\n", xerr);
730  return -1;
731  }
732 }
733 
735  struct xvid_context *x = avctx->priv_data;
736 
737  xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
738 
739  av_freep(&avctx->extradata);
740  if( x->twopassbuffer != NULL ) {
743  }
744  av_free(x->twopassfile);
745  av_free(x->intra_matrix);
746  av_free(x->inter_matrix);
747 
748  return 0;
749 }
750 
752  .name = "libxvid",
753  .long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
754  .type = AVMEDIA_TYPE_VIDEO,
755  .id = AV_CODEC_ID_MPEG4,
756  .priv_data_size = sizeof(struct xvid_context),
757  .init = xvid_encode_init,
758  .encode2 = xvid_encode_frame,
759  .close = xvid_encode_close,
760  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
761 };
#define AV_CPU_FLAG_ALTIVEC
standard
Definition: cpu.h:53
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
S(GMC)-VOP MPEG4.
Definition: avutil.h:256
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:242
This structure describes decoded (raw) audio or video data.
Definition: frame.h:107
int mpeg_quant
0-> h263 quant 1-> mpeg quant
Definition: avcodec.h:1339
char * old_twopassbuffer
Old character buffer (two-pass)
Definition: libxvid.c:58
#define CODEC_FLAG_PASS2
Use internal 2pass ratecontrol in second pass mode.
Definition: avcodec.h:669
AVCodec ff_libxvid_encoder
Definition: libxvid.c:751
#define CODEC_FLAG_PASS1
Use internal 2pass ratecontrol in first pass mode.
Definition: avcodec.h:668
static AVFrame * picture
Definition: output.c:179
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2506
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:1302
#define BUFFER_REMAINING(x)
Definition: libxvid.c:41
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:974
enhanced predictive zonal search
Definition: avcodec.h:528
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:1422
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1247
char * stats_in
pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed he...
Definition: avcodec.h:2286
mpegvideo header.
unsigned char * intra_matrix
P-Frame Quant Matrix.
Definition: libxvid.c:60
int ysize
Frame y size.
Definition: libxvid.c:51
AVCodec.
Definition: avcodec.h:2755
int me_flags
Motion Estimation flags.
Definition: libxvid.c:54
#define CODEC_FLAG_QPEL
Use qpel MC.
Definition: avcodec.h:659
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:1173
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
int xsize
Frame x size.
Definition: libxvid.c:50
#define av_cold
Definition: attributes.h:66
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:43
#define CODEC_FLAG_GLOBAL_HEADER
Place global headers in extradata instead of every keyframe.
Definition: avcodec.h:684
static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *picture, int *got_packet)
Definition: libxvid.c:615
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:1311
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1162
int quicktime_format
Are we in a QT-based format?
Definition: libxvid.c:56
uint8_t * data
Definition: avcodec.h:973
struct xvid_context * context
Pointer to private context.
Definition: libxvid.c:69
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:252
float lumi_masking
luminance masking (0-> disabled)
Definition: avcodec.h:1362
char * stats_out
pass1 encoding statistics output buffer
Definition: avcodec.h:2278
#define CODEC_FLAG_AC_PRED
H.263 advanced intra coding / MPEG-4 AC prediction.
Definition: avcodec.h:687
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1023
static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
Dispatch function for our custom plugin.
Definition: libxvid.c:215
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:80
no search, that is use 0,0 vector whenever one is needed
Definition: avcodec.h:524
reserved for experiments
Definition: avcodec.h:529
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
#define AVERROR(e)
Definition: error.h:43
int qmax
maximum quantizer
Definition: avcodec.h:2068
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:142
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:144
int flags
CODEC_FLAG_*.
Definition: avcodec.h:1142
#define CODEC_FLAG_QSCALE
Use fixed qscale.
Definition: avcodec.h:656
int64_t av_gcd(int64_t a, int64_t b)
Return the greatest common divisor of a and b.
Definition: mathematics.c:53
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:148
const char * name
Name of the codec implementation.
Definition: avcodec.h:2762
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:979
static av_cold int xvid_encode_close(AVCodecContext *avctx)
Definition: libxvid.c:734
char * twopassfile
second pass temp file name
Definition: libxvid.c:59
#define BUFFER_SIZE
Buffer management macros.
Definition: libxvid.c:40
int vop_flags
VOP flags for Xvid encoder.
Definition: libxvid.c:52
int bit_rate
the average bitrate
Definition: avcodec.h:1112
Structure for the private first-pass plugin.
Definition: libxvid.c:67
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:168
#define FF_MIN_BUFFER_SIZE
minimum encoding buffer size Used to avoid some checks during header writing.
Definition: avcodec.h:516
#define MAX_MB_BYTES
Definition: mpegvideo.h:74
Structure for the private Xvid context.
Definition: libxvid.c:48
int width
picture width / height.
Definition: avcodec.h:1217
unsigned char * inter_matrix
I-Frame Quant Matrix.
Definition: libxvid.c:61
int quality
quality (between 1 (good) and FF_LAMBDA_MAX (bad))
Definition: frame.h:207
#define AV_RL32
Definition: intreadwrite.h:146
int mb_decision
macroblock decision mode
Definition: avcodec.h:1571
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2514
NULL
Definition: eval.c:55
Libavcodec external API header.
#define BUFFER_CAT(x)
Definition: libxvid.c:42
enum AVCodecID codec_id
Definition: avcodec.h:1065
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:125
main external API structure.
Definition: avcodec.h:1054
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:489
int qmin
minimum quantizer
Definition: avcodec.h:2061
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1080
int extradata_size
Definition: avcodec.h:1163
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:1581
char * twopassbuffer
Character buffer for two-pass.
Definition: libxvid.c:57
float b_quant_offset
qscale offset between IP and B-frames
Definition: avcodec.h:1324
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:47
static av_cold int xvid_encode_init(AVCodecContext *avctx)
Definition: libxvid.c:342
int version
Xvid version.
Definition: libxvid.c:68
#define CODEC_FLAG_CLOSED_GOP
Definition: avcodec.h:690
static av_always_inline av_const float roundf(float x)
Definition: libm.h:158
uint16_t * inter_matrix
custom inter quantization matrix
Definition: avcodec.h:1588
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:113
int gop_size
the number of pictures in a group of pictures, or 0 for intra_only
Definition: avcodec.h:1238
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
#define CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:670
int vol_flags
VOL flags for Xvid encoder.
Definition: libxvid.c:53
Bi-dir predicted.
Definition: avutil.h:255
int ff_tempfile(const char *prefix, char **filename)
Definition: libxvid_rc.c:44
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:89
int trellis
trellis RD quantization
Definition: avcodec.h:2220
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:136
void * encoder_handle
Handle for Xvid encoder.
Definition: libxvid.c:49
void * priv_data
Definition: avcodec.h:1090
#define CODEC_FLAG_GMC
Use GMC.
Definition: avcodec.h:660
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:179
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:163
#define FF_QP2LAMBDA
factor to convert from H.263 QP to lambda
Definition: avutil.h:207
static int xvid_ff_2pass_destroy(struct xvid_context *ref, xvid_plg_destroy_t *param)
Destroy the two-pass plugin context.
Definition: libxvid.c:120
static void xvid_correct_framerate(AVCodecContext *avctx)
Routine to correct a possibly erroneous framerate being fed to us.
Definition: libxvid.c:292
int me_method
Motion estimation algorithm used for video coding.
Definition: avcodec.h:1256
int qscale
Do we use constant scale?
Definition: libxvid.c:55
#define CODEC_FLAG_4MV
4 MV per MB allowed / advanced prediction for H.263.
Definition: avcodec.h:657
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
This structure stores compressed data.
Definition: avcodec.h:950
Predicted.
Definition: avutil.h:254