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;
58  char *twopassbuffer;
60  char *twopassfile;
61  unsigned char *intra_matrix;
62  unsigned char *inter_matrix;
63 };
64 
68 struct xvid_ff_pass1 {
69  int version;
71 };
72 
73 /*
74  * Xvid 2-Pass Kludge Section
75  *
76  * Xvid's default 2-pass doesn't allow us to create data as we need to, so
77  * this section spends time replacing the first pass plugin so we can write
78  * statistic information as libavcodec requests in. We have another kludge
79  * that allows us to pass data to the second pass in Xvid without a custom
80  * rate-control plugin.
81  */
82 
90 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
91  void ** handle) {
92  struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
93  char *log = x->context->twopassbuffer;
94 
95  /* Do a quick bounds check */
96  if( log == NULL )
97  return XVID_ERR_FAIL;
98 
99  /* We use snprintf() */
100  /* This is because we can safely prevent a buffer overflow */
101  log[0] = 0;
102  snprintf(log, BUFFER_REMAINING(log),
103  "# avconv 2-pass log file, using xvid codec\n");
104  snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
105  "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
106  XVID_VERSION_MAJOR(XVID_VERSION),
107  XVID_VERSION_MINOR(XVID_VERSION),
108  XVID_VERSION_PATCH(XVID_VERSION));
109 
110  *handle = x->context;
111  return 0;
112 }
113 
121 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
122  xvid_plg_destroy_t *param) {
123  /* Currently cannot think of anything to do on destruction */
124  /* Still, the framework should be here for reference/use */
125  if( ref->twopassbuffer != NULL )
126  ref->twopassbuffer[0] = 0;
127  return 0;
128 }
129 
137 static int xvid_ff_2pass_before(struct xvid_context *ref,
138  xvid_plg_data_t *param) {
139  int motion_remove;
140  int motion_replacements;
141  int vop_remove;
142 
143  /* Nothing to do here, result is changed too much */
144  if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
145  return 0;
146 
147  /* We can implement a 'turbo' first pass mode here */
148  param->quant = 2;
149 
150  /* Init values */
151  motion_remove = ~XVID_ME_CHROMA_PVOP &
152  ~XVID_ME_CHROMA_BVOP &
153  ~XVID_ME_EXTSEARCH16 &
154  ~XVID_ME_ADVANCEDDIAMOND16;
155  motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
156  XVID_ME_SKIP_DELTASEARCH |
157  XVID_ME_FASTREFINE16 |
158  XVID_ME_BFRAME_EARLYSTOP;
159  vop_remove = ~XVID_VOP_MODEDECISION_RD &
160  ~XVID_VOP_FAST_MODEDECISION_RD &
161  ~XVID_VOP_TRELLISQUANT &
162  ~XVID_VOP_INTER4V &
163  ~XVID_VOP_HQACPRED;
164 
165  param->vol_flags &= ~XVID_VOL_GMC;
166  param->vop_flags &= vop_remove;
167  param->motion_flags &= motion_remove;
168  param->motion_flags |= motion_replacements;
169 
170  return 0;
171 }
172 
180 static int xvid_ff_2pass_after(struct xvid_context *ref,
181  xvid_plg_data_t *param) {
182  char *log = ref->twopassbuffer;
183  const char *frame_types = " ipbs";
184  char frame_type;
185 
186  /* Quick bounds check */
187  if( log == NULL )
188  return XVID_ERR_FAIL;
189 
190  /* Convert the type given to us into a character */
191  if( param->type < 5 && param->type > 0 ) {
192  frame_type = frame_types[param->type];
193  } else {
194  return XVID_ERR_FAIL;
195  }
196 
197  snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
198  "%c %d %d %d %d %d %d\n",
199  frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
200  param->stats.ublks, param->stats.length, param->stats.hlength);
201 
202  return 0;
203 }
204 
216 static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
217 {
218  switch( cmd ) {
219  case XVID_PLG_INFO:
220  case XVID_PLG_FRAME:
221  return 0;
222 
223  case XVID_PLG_BEFORE:
224  return xvid_ff_2pass_before(ref, p1);
225 
226  case XVID_PLG_CREATE:
227  return xvid_ff_2pass_create(p1, p2);
228 
229  case XVID_PLG_AFTER:
230  return xvid_ff_2pass_after(ref, p1);
231 
232  case XVID_PLG_DESTROY:
233  return xvid_ff_2pass_destroy(ref, p1);
234 
235  default:
236  return XVID_ERR_FAIL;
237  }
238 }
239 
254  AVPacket *pkt,
255  unsigned int header_len,
256  unsigned int frame_len) {
257  int vo_len = 0, i;
258 
259  for( i = 0; i < header_len - 3; i++ ) {
260  if( pkt->data[i] == 0x00 &&
261  pkt->data[i+1] == 0x00 &&
262  pkt->data[i+2] == 0x01 &&
263  pkt->data[i+3] == 0xB6 ) {
264  vo_len = i;
265  break;
266  }
267  }
268 
269  if( vo_len > 0 ) {
270  /* We need to store the header, so extract it */
271  if( avctx->extradata == NULL ) {
272  avctx->extradata = av_malloc(vo_len);
273  memcpy(avctx->extradata, pkt->data, vo_len);
274  avctx->extradata_size = vo_len;
275  }
276  /* Less dangerous now, memmove properly copies the two
277  chunks of overlapping data */
278  memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
279  pkt->size = frame_len - vo_len;
280  }
281  return 0;
282 }
283 
294 {
295  int frate, fbase;
296  int est_frate, est_fbase;
297  int gcd;
298  float est_fps, fps;
299 
300  frate = avctx->time_base.den;
301  fbase = avctx->time_base.num;
302 
303  gcd = av_gcd(frate, fbase);
304  if( gcd > 1 ) {
305  frate /= gcd;
306  fbase /= gcd;
307  }
308 
309  if( frate <= 65000 && fbase <= 65000 ) {
310  avctx->time_base.den = frate;
311  avctx->time_base.num = fbase;
312  return;
313  }
314 
315  fps = (float)frate / (float)fbase;
316  est_fps = roundf(fps * 1000.0) / 1000.0;
317 
318  est_frate = (int)est_fps;
319  if( est_fps > (int)est_fps ) {
320  est_frate = (est_frate + 1) * 1000;
321  est_fbase = (int)roundf((float)est_frate / est_fps);
322  } else
323  est_fbase = 1;
324 
325  gcd = av_gcd(est_frate, est_fbase);
326  if( gcd > 1 ) {
327  est_frate /= gcd;
328  est_fbase /= gcd;
329  }
330 
331  if( fbase > est_fbase ) {
332  avctx->time_base.den = est_frate;
333  avctx->time_base.num = est_fbase;
334  av_log(avctx, AV_LOG_DEBUG,
335  "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
336  est_fps, (((est_fps - fps)/fps) * 100.0));
337  } else {
338  avctx->time_base.den = frate;
339  avctx->time_base.num = fbase;
340  }
341 }
342 
344  int xerr, i;
345  int xvid_flags = avctx->flags;
346  struct xvid_context *x = avctx->priv_data;
347  uint16_t *intra, *inter;
348  int fd;
349 
350  xvid_plugin_single_t single = { 0 };
351  struct xvid_ff_pass1 rc2pass1 = { 0 };
352  xvid_plugin_2pass2_t rc2pass2 = { 0 };
353  xvid_gbl_init_t xvid_gbl_init = { 0 };
354  xvid_enc_create_t xvid_enc_create = { 0 };
355  xvid_enc_plugin_t plugins[7];
356 
357  /* Bring in VOP flags from avconv command-line */
358  x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
359  if( xvid_flags & CODEC_FLAG_4MV )
360  x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
361  if( avctx->trellis
362  )
363  x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
364  if( xvid_flags & CODEC_FLAG_AC_PRED )
365  x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
366  if( xvid_flags & CODEC_FLAG_GRAY )
367  x->vop_flags |= XVID_VOP_GREYSCALE;
368 
369  /* Decide which ME quality setting to use */
370  x->me_flags = 0;
371  switch( avctx->me_method ) {
372  case ME_FULL: /* Quality 6 */
373  x->me_flags |= XVID_ME_EXTSEARCH16
374  | XVID_ME_EXTSEARCH8;
375 
376  case ME_EPZS: /* Quality 4 */
377  x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
378  | XVID_ME_HALFPELREFINE8
379  | XVID_ME_CHROMA_PVOP
380  | XVID_ME_CHROMA_BVOP;
381 
382  case ME_LOG: /* Quality 2 */
383  case ME_PHODS:
384  case ME_X1:
385  x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
386  | XVID_ME_HALFPELREFINE16;
387 
388  case ME_ZERO: /* Quality 0 */
389  default:
390  break;
391  }
392 
393  /* Decide how we should decide blocks */
394  switch( avctx->mb_decision ) {
395  case 2:
396  x->vop_flags |= XVID_VOP_MODEDECISION_RD;
397  x->me_flags |= XVID_ME_HALFPELREFINE8_RD
398  | XVID_ME_QUARTERPELREFINE8_RD
399  | XVID_ME_EXTSEARCH_RD
400  | XVID_ME_CHECKPREDICTION_RD;
401  case 1:
402  if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
403  x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
404  x->me_flags |= XVID_ME_HALFPELREFINE16_RD
405  | XVID_ME_QUARTERPELREFINE16_RD;
406 
407  default:
408  break;
409  }
410 
411  /* Bring in VOL flags from avconv command-line */
412  x->vol_flags = 0;
413  if( xvid_flags & CODEC_FLAG_GMC ) {
414  x->vol_flags |= XVID_VOL_GMC;
415  x->me_flags |= XVID_ME_GME_REFINE;
416  }
417  if( xvid_flags & CODEC_FLAG_QPEL ) {
418  x->vol_flags |= XVID_VOL_QUARTERPEL;
419  x->me_flags |= XVID_ME_QUARTERPELREFINE16;
420  if( x->vop_flags & XVID_VOP_INTER4V )
421  x->me_flags |= XVID_ME_QUARTERPELREFINE8;
422  }
423 
424  xvid_gbl_init.version = XVID_VERSION;
425  xvid_gbl_init.debug = 0;
426 
427 #if ARCH_PPC
428  /* Xvid's PPC support is borked, use libavcodec to detect */
429 #if HAVE_ALTIVEC
431  xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
432  } else
433 #endif
434  xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
435 #else
436  /* Xvid can detect on x86 */
437  xvid_gbl_init.cpu_flags = 0;
438 #endif
439 
440  /* Initialize */
441  xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
442 
443  /* Create the encoder reference */
444  xvid_enc_create.version = XVID_VERSION;
445 
446  /* Store the desired frame size */
447  xvid_enc_create.width = x->xsize = avctx->width;
448  xvid_enc_create.height = x->ysize = avctx->height;
449 
450  /* Xvid can determine the proper profile to use */
451  /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
452 
453  /* We don't use zones */
454  xvid_enc_create.zones = NULL;
455  xvid_enc_create.num_zones = 0;
456 
457  xvid_enc_create.num_threads = avctx->thread_count;
458 
459  xvid_enc_create.plugins = plugins;
460  xvid_enc_create.num_plugins = 0;
461 
462  /* Initialize Buffers */
463  x->twopassbuffer = NULL;
464  x->old_twopassbuffer = NULL;
465  x->twopassfile = NULL;
466 
467  if( xvid_flags & CODEC_FLAG_PASS1 ) {
468  rc2pass1.version = XVID_VERSION;
469  rc2pass1.context = x;
472  if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
473  av_log(avctx, AV_LOG_ERROR,
474  "Xvid: Cannot allocate 2-pass log buffers\n");
475  return -1;
476  }
477  x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
478 
479  plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
480  plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
481  xvid_enc_create.num_plugins++;
482  } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
483  rc2pass2.version = XVID_VERSION;
484  rc2pass2.bitrate = avctx->bit_rate;
485 
486  fd = ff_tempfile("xvidff.", &x->twopassfile);
487  if( fd == -1 ) {
488  av_log(avctx, AV_LOG_ERROR,
489  "Xvid: Cannot write 2-pass pipe\n");
490  return -1;
491  }
492 
493  if( avctx->stats_in == NULL ) {
494  av_log(avctx, AV_LOG_ERROR,
495  "Xvid: No 2-pass information loaded for second pass\n");
496  return -1;
497  }
498 
499  if( strlen(avctx->stats_in) >
500  write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
501  close(fd);
502  av_log(avctx, AV_LOG_ERROR,
503  "Xvid: Cannot write to 2-pass pipe\n");
504  return -1;
505  }
506 
507  close(fd);
508  rc2pass2.filename = x->twopassfile;
509  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
510  plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
511  xvid_enc_create.num_plugins++;
512  } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
513  /* Single Pass Bitrate Control! */
514  single.version = XVID_VERSION;
515  single.bitrate = avctx->bit_rate;
516 
517  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
518  plugins[xvid_enc_create.num_plugins].param = &single;
519  xvid_enc_create.num_plugins++;
520  }
521 
522  /* Luminance Masking */
523  if( 0.0 != avctx->lumi_masking ) {
524  plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
525  plugins[xvid_enc_create.num_plugins].param = NULL;
526  xvid_enc_create.num_plugins++;
527  }
528 
529  /* Frame Rate and Key Frames */
530  xvid_correct_framerate(avctx);
531  xvid_enc_create.fincr = avctx->time_base.num;
532  xvid_enc_create.fbase = avctx->time_base.den;
533  if( avctx->gop_size > 0 )
534  xvid_enc_create.max_key_interval = avctx->gop_size;
535  else
536  xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
537 
538  /* Quants */
539  if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
540  else x->qscale = 0;
541 
542  xvid_enc_create.min_quant[0] = avctx->qmin;
543  xvid_enc_create.min_quant[1] = avctx->qmin;
544  xvid_enc_create.min_quant[2] = avctx->qmin;
545  xvid_enc_create.max_quant[0] = avctx->qmax;
546  xvid_enc_create.max_quant[1] = avctx->qmax;
547  xvid_enc_create.max_quant[2] = avctx->qmax;
548 
549  /* Quant Matrices */
550  x->intra_matrix = x->inter_matrix = NULL;
551  if( avctx->mpeg_quant )
552  x->vol_flags |= XVID_VOL_MPEGQUANT;
553  if( (avctx->intra_matrix || avctx->inter_matrix) ) {
554  x->vol_flags |= XVID_VOL_MPEGQUANT;
555 
556  if( avctx->intra_matrix ) {
557  intra = avctx->intra_matrix;
558  x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
559  } else
560  intra = NULL;
561  if( avctx->inter_matrix ) {
562  inter = avctx->inter_matrix;
563  x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
564  } else
565  inter = NULL;
566 
567  for( i = 0; i < 64; i++ ) {
568  if( intra )
569  x->intra_matrix[i] = (unsigned char)intra[i];
570  if( inter )
571  x->inter_matrix[i] = (unsigned char)inter[i];
572  }
573  }
574 
575  /* Misc Settings */
576  xvid_enc_create.frame_drop_ratio = 0;
577  xvid_enc_create.global = 0;
578  if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
579  xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
580 
581  /* Determines which codec mode we are operating in */
582  avctx->extradata = NULL;
583  avctx->extradata_size = 0;
584  if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
585  /* In this case, we are claiming to be MPEG4 */
586  x->quicktime_format = 1;
587  avctx->codec_id = AV_CODEC_ID_MPEG4;
588  } else {
589  /* We are claiming to be Xvid */
590  x->quicktime_format = 0;
591  if(!avctx->codec_tag)
592  avctx->codec_tag = AV_RL32("xvid");
593  }
594 
595  /* Bframes */
596  xvid_enc_create.max_bframes = avctx->max_b_frames;
597  xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
598  xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
599  if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
600 
601  /* Create encoder context */
602  xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
603  if( xerr ) {
604  av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
605  return -1;
606  }
607 
608  x->encoder_handle = xvid_enc_create.handle;
609  avctx->coded_frame = &x->encoded_picture;
610 
611  return 0;
612 }
613 
614 static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
615  const AVFrame *picture, int *got_packet)
616 {
617  int xerr, i, ret, user_packet = !!pkt->data;
618  char *tmp;
619  struct xvid_context *x = avctx->priv_data;
620  AVFrame *p = &x->encoded_picture;
621  int mb_width = (avctx->width + 15) / 16;
622  int mb_height = (avctx->height + 15) / 16;
623 
624  xvid_enc_frame_t xvid_enc_frame = { 0 };
625  xvid_enc_stats_t xvid_enc_stats = { 0 };
626 
627  if (!user_packet &&
628  (ret = av_new_packet(pkt, mb_width*mb_height*MAX_MB_BYTES + FF_MIN_BUFFER_SIZE)) < 0) {
629  av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
630  return ret;
631  }
632 
633  /* Start setting up the frame */
634  xvid_enc_frame.version = XVID_VERSION;
635  xvid_enc_stats.version = XVID_VERSION;
636  *p = *picture;
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  .type = AVMEDIA_TYPE_VIDEO,
754  .id = AV_CODEC_ID_MPEG4,
755  .priv_data_size = sizeof(struct xvid_context),
756  .init = xvid_encode_init,
757  .encode2 = xvid_encode_frame,
758  .close = xvid_encode_close,
759  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
760  .long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
761 };
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:61
S(GMC)-VOP MPEG4.
Definition: avutil.h:248
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:153
This structure describes decoded (raw) audio or video data.
Definition: avcodec.h:989
int mpeg_quant
0-> h263 quant 1-> mpeg quant
Definition: avcodec.h:1641
char * old_twopassbuffer
Old character buffer (two-pass)
Definition: libxvid.c:59
AVCodec ff_libxvid_encoder
Definition: libxvid.c:751
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2725
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:1588
#define BUFFER_REMAINING(x)
Definition: libxvid.c:41
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:916
enhanced predictive zonal search
Definition: avcodec.h:517
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:1724
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1533
char * stats_in
pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed he...
Definition: avcodec.h:2510
mpegvideo header.
unsigned char * intra_matrix
P-Frame Quant Matrix.
Definition: libxvid.c:61
int ysize
Frame y size.
Definition: libxvid.c:51
AVCodec.
Definition: avcodec.h:2960
int me_flags
Motion Estimation flags.
Definition: libxvid.c:54
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:1465
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:151
int xsize
Frame x size.
Definition: libxvid.c:50
static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *picture, int *got_packet)
Definition: libxvid.c:614
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:1597
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1454
int quicktime_format
Are we in a QT-based format?
Definition: libxvid.c:56
uint8_t * data
Definition: avcodec.h:915
struct xvid_context * context
Pointer to private context.
Definition: libxvid.c:70
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:253
float lumi_masking
luminance masking (0-> disabled)
Definition: avcodec.h:1664
char * stats_out
pass1 encoding statistics output buffer
Definition: avcodec.h:2502
static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
Dispatch function for our custom plugin.
Definition: libxvid.c:216
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:56
no search, that is use 0,0 vector whenever one is needed
Definition: avcodec.h:513
reserved for experiments
Definition: avcodec.h:518
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:139
int qmax
maximum quantizer
Definition: avcodec.h:2292
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
int flags
CODEC_FLAG_*.
Definition: avcodec.h:1434
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:146
const char * name
Name of the codec implementation.
Definition: avcodec.h:2967
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:921
static av_cold int xvid_encode_close(AVCodecContext *avctx)
Definition: libxvid.c:734
char * twopassfile
second pass temp file name
Definition: libxvid.c:60
AVFrame encoded_picture
Encoded frame information.
Definition: libxvid.c:57
#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:1404
static AVFrame * picture
Structure for the private first-pass plugin.
Definition: libxvid.c:68
enum AVPictureType pict_type
Picture type of the frame, see ?_TYPE below.
Definition: avcodec.h:1065
#define MAX_MB_BYTES
Definition: mpegvideo.h:69
Structure for the private Xvid context.
Definition: libxvid.c:48
int width
picture width / height.
Definition: avcodec.h:1508
unsigned char * inter_matrix
I-Frame Quant Matrix.
Definition: libxvid.c:62
int quality
quality (between 1 (good) and FF_LAMBDA_MAX (bad))
Definition: avcodec.h:1122
#define AV_RL32
Definition: intreadwrite.h:146
int mb_decision
macroblock decision mode
Definition: avcodec.h:1882
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2733
NULL
Definition: eval.c:52
external API header
#define BUFFER_CAT(x)
Definition: libxvid.c:42
enum AVCodecID codec_id
Definition: avcodec.h:1350
int linesize[AV_NUM_DATA_POINTERS]
Size, in bytes, of the data for each picture/channel plane.
Definition: avcodec.h:1008
main external API structure.
Definition: avcodec.h:1339
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:326
int qmin
minimum quantizer
Definition: avcodec.h:2285
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1365
int extradata_size
Definition: avcodec.h:1455
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:1892
char * twopassbuffer
Character buffer for two-pass.
Definition: libxvid.c:58
float b_quant_offset
qscale offset between IP and B-frames
Definition: avcodec.h:1626
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:25
static av_cold int xvid_encode_init(AVCodecContext *avctx)
Definition: libxvid.c:343
int version
Xvid version.
Definition: libxvid.c:69
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:1899
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: avcodec.h:997
int gop_size
the number of pictures in a group of pictures, or 0 for intra_only
Definition: avcodec.h:1524
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
int vol_flags
VOL flags for Xvid encoder.
Definition: libxvid.c:53
Bi-dir predicted.
Definition: avutil.h:247
int ff_tempfile(const char *prefix, char **filename)
Definition: libxvid_rc.c:43
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:90
int trellis
trellis RD quantization
Definition: avcodec.h:2444
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:137
void * encoder_handle
Handle for Xvid encoder.
Definition: libxvid.c:49
void * priv_data
Definition: avcodec.h:1382
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:180
int key_frame
1 -> keyframe, 0-> not
Definition: avcodec.h:1058
static int xvid_ff_2pass_destroy(struct xvid_context *ref, xvid_plg_destroy_t *param)
Destroy the two-pass plugin context.
Definition: libxvid.c:121
static void xvid_correct_framerate(AVCodecContext *avctx)
Routine to correct a possibly erroneous framerate being fed to us.
Definition: libxvid.c:293
int me_method
Motion estimation algorithm used for video coding.
Definition: avcodec.h:1542
int qscale
Do we use constant scale?
Definition: libxvid.c:55
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
This structure stores compressed data.
Definition: avcodec.h:898
Predicted.
Definition: avutil.h:246