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h264dec.c
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1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... decoder
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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  * H.264 / AVC / MPEG-4 part10 codec.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27 
28 #define UNCHECKED_BITSTREAM_READER 1
29 
30 #include "libavutil/avassert.h"
31 #include "libavutil/display.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/stereo3d.h"
35 #include "libavutil/timer.h"
36 #include "internal.h"
37 #include "bytestream.h"
38 #include "cabac.h"
39 #include "cabac_functions.h"
40 #include "error_resilience.h"
41 #include "avcodec.h"
42 #include "h264.h"
43 #include "h264dec.h"
44 #include "h2645_parse.h"
45 #include "h264data.h"
46 #include "h264chroma.h"
47 #include "h264_mvpred.h"
48 #include "h264_ps.h"
49 #include "golomb.h"
50 #include "hwaccel.h"
51 #include "mathops.h"
52 #include "me_cmp.h"
53 #include "mpegutils.h"
54 #include "profiles.h"
55 #include "rectangle.h"
56 #include "thread.h"
57 
58 const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
59 
61 {
62  H264Context *h = avctx->priv_data;
63  return h && h->ps.sps ? h->ps.sps->num_reorder_frames : 0;
64 }
65 
66 static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
67  int (*mv)[2][4][2],
68  int mb_x, int mb_y, int mb_intra, int mb_skipped)
69 {
70  H264Context *h = opaque;
71  H264SliceContext *sl = &h->slice_ctx[0];
72 
73  sl->mb_x = mb_x;
74  sl->mb_y = mb_y;
75  sl->mb_xy = mb_x + mb_y * h->mb_stride;
76  memset(sl->non_zero_count_cache, 0, sizeof(sl->non_zero_count_cache));
77  av_assert1(ref >= 0);
78  /* FIXME: It is possible albeit uncommon that slice references
79  * differ between slices. We take the easy approach and ignore
80  * it for now. If this turns out to have any relevance in
81  * practice then correct remapping should be added. */
82  if (ref >= sl->ref_count[0])
83  ref = 0;
84  if (!sl->ref_list[0][ref].data[0]) {
85  av_log(h->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
86  ref = 0;
87  }
88  if ((sl->ref_list[0][ref].reference&3) != 3) {
89  av_log(h->avctx, AV_LOG_DEBUG, "Reference invalid\n");
90  return;
91  }
92  fill_rectangle(&h->cur_pic.ref_index[0][4 * sl->mb_xy],
93  2, 2, 2, ref, 1);
94  fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
95  fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
96  pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
97  sl->mb_mbaff =
98  sl->mb_field_decoding_flag = 0;
100 }
101 
103  int y, int height)
104 {
105  AVCodecContext *avctx = h->avctx;
106  const AVFrame *src = h->cur_pic.f;
108  int vshift = desc->log2_chroma_h;
109  const int field_pic = h->picture_structure != PICT_FRAME;
110  if (field_pic) {
111  height <<= 1;
112  y <<= 1;
113  }
114 
115  height = FFMIN(height, avctx->height - y);
116 
117  if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
118  return;
119 
120  if (avctx->draw_horiz_band) {
122  int i;
123 
124  offset[0] = y * src->linesize[0];
125  offset[1] =
126  offset[2] = (y >> vshift) * src->linesize[1];
127  for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
128  offset[i] = 0;
129 
130  emms_c();
131 
132  avctx->draw_horiz_band(avctx, src, offset,
133  y, h->picture_structure, height);
134  }
135 }
136 
138 {
139  int i;
140 
143  av_freep(&h->cbp_table);
144  av_freep(&h->mvd_table[0]);
145  av_freep(&h->mvd_table[1]);
146  av_freep(&h->direct_table);
149  h->slice_table = NULL;
150  av_freep(&h->list_counts);
151 
152  av_freep(&h->mb2b_xy);
153  av_freep(&h->mb2br_xy);
154 
159 
160  for (i = 0; i < h->nb_slice_ctx; i++) {
161  H264SliceContext *sl = &h->slice_ctx[i];
162 
163  av_freep(&sl->dc_val_base);
164  av_freep(&sl->er.mb_index2xy);
166  av_freep(&sl->er.er_temp_buffer);
167 
170  av_freep(&sl->top_borders[0]);
171  av_freep(&sl->top_borders[1]);
172 
175  sl->top_borders_allocated[0] = 0;
176  sl->top_borders_allocated[1] = 0;
177  }
178 }
179 
181 {
182  const int big_mb_num = h->mb_stride * (h->mb_height + 1);
183  const int row_mb_num = 2*h->mb_stride*FFMAX(h->nb_slice_ctx, 1);
184  int x, y;
185 
187  row_mb_num, 8 * sizeof(uint8_t), fail)
189 
191  big_mb_num * 48 * sizeof(uint8_t), fail)
193  (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
195  big_mb_num * sizeof(uint16_t), fail)
197  big_mb_num * sizeof(uint8_t), fail)
199  row_mb_num, 16 * sizeof(uint8_t), fail);
201  row_mb_num, 16 * sizeof(uint8_t), fail);
202  h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
203  h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
204 
206  4 * big_mb_num * sizeof(uint8_t), fail);
208  big_mb_num * sizeof(uint8_t), fail)
209 
210  memset(h->slice_table_base, -1,
211  (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
212  h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
213 
215  big_mb_num * sizeof(uint32_t), fail);
217  big_mb_num * sizeof(uint32_t), fail);
218  for (y = 0; y < h->mb_height; y++)
219  for (x = 0; x < h->mb_width; x++) {
220  const int mb_xy = x + y * h->mb_stride;
221  const int b_xy = 4 * x + 4 * y * h->b_stride;
222 
223  h->mb2b_xy[mb_xy] = b_xy;
224  h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
225  }
226 
227  return 0;
228 
229 fail:
231  return AVERROR(ENOMEM);
232 }
233 
234 /**
235  * Init context
236  * Allocate buffers which are not shared amongst multiple threads.
237  */
239 {
240  ERContext *er = &sl->er;
241  int mb_array_size = h->mb_height * h->mb_stride;
242  int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
243  int c_size = h->mb_stride * (h->mb_height + 1);
244  int yc_size = y_size + 2 * c_size;
245  int x, y, i;
246 
247  sl->ref_cache[0][scan8[5] + 1] =
248  sl->ref_cache[0][scan8[7] + 1] =
249  sl->ref_cache[0][scan8[13] + 1] =
250  sl->ref_cache[1][scan8[5] + 1] =
251  sl->ref_cache[1][scan8[7] + 1] =
252  sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
253 
254  if (sl != h->slice_ctx) {
255  memset(er, 0, sizeof(*er));
256  } else
257  if (CONFIG_ERROR_RESILIENCE) {
258 
259  /* init ER */
260  er->avctx = h->avctx;
262  er->opaque = h;
263  er->quarter_sample = 1;
264 
265  er->mb_num = h->mb_num;
266  er->mb_width = h->mb_width;
267  er->mb_height = h->mb_height;
268  er->mb_stride = h->mb_stride;
269  er->b8_stride = h->mb_width * 2 + 1;
270 
271  // error resilience code looks cleaner with this
273  (h->mb_num + 1) * sizeof(int), fail);
274 
275  for (y = 0; y < h->mb_height; y++)
276  for (x = 0; x < h->mb_width; x++)
277  er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
278 
279  er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
280  h->mb_stride + h->mb_width;
281 
283  mb_array_size * sizeof(uint8_t), fail);
284 
286  h->mb_height * h->mb_stride * (4*sizeof(int) + 1), fail);
287 
289  yc_size * sizeof(int16_t), fail);
290  er->dc_val[0] = sl->dc_val_base + h->mb_width * 2 + 2;
291  er->dc_val[1] = sl->dc_val_base + y_size + h->mb_stride + 1;
292  er->dc_val[2] = er->dc_val[1] + c_size;
293  for (i = 0; i < yc_size; i++)
294  sl->dc_val_base[i] = 1024;
295  }
296 
297  return 0;
298 
299 fail:
300  return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
301 }
302 
304 {
305  int i;
306 
307  h->avctx = avctx;
308  h->cur_chroma_format_idc = -1;
309 
310  h->width_from_caller = avctx->width;
311  h->height_from_caller = avctx->height;
312 
314  h->workaround_bugs = avctx->workaround_bugs;
315  h->flags = avctx->flags;
316  h->poc.prev_poc_msb = 1 << 16;
317  h->recovery_frame = -1;
318  h->frame_recovered = 0;
319  h->poc.prev_frame_num = -1;
321  h->sei.unregistered.x264_build = -1;
322 
323  h->next_outputed_poc = INT_MIN;
324  for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
325  h->last_pocs[i] = INT_MIN;
326 
327  ff_h264_sei_uninit(&h->sei);
328 
330 
331  h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? avctx->thread_count : 1;
332  h->slice_ctx = av_mallocz_array(h->nb_slice_ctx, sizeof(*h->slice_ctx));
333  if (!h->slice_ctx) {
334  h->nb_slice_ctx = 0;
335  return AVERROR(ENOMEM);
336  }
337 
338  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
339  h->DPB[i].f = av_frame_alloc();
340  if (!h->DPB[i].f)
341  return AVERROR(ENOMEM);
342  }
343 
344  h->cur_pic.f = av_frame_alloc();
345  if (!h->cur_pic.f)
346  return AVERROR(ENOMEM);
347 
349  if (!h->last_pic_for_ec.f)
350  return AVERROR(ENOMEM);
351 
352  for (i = 0; i < h->nb_slice_ctx; i++)
353  h->slice_ctx[i].h264 = h;
354 
355  return 0;
356 }
357 
359 {
360  H264Context *h = avctx->priv_data;
361  int i;
362 
365 
366  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
367  ff_h264_unref_picture(h, &h->DPB[i]);
368  av_frame_free(&h->DPB[i].f);
369  }
370  memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
371 
372  h->cur_pic_ptr = NULL;
373 
374  av_freep(&h->slice_ctx);
375  h->nb_slice_ctx = 0;
376 
377  ff_h264_sei_uninit(&h->sei);
378  ff_h264_ps_uninit(&h->ps);
379 
381 
383  av_frame_free(&h->cur_pic.f);
386 
387  return 0;
388 }
389 
391 
393 {
394  H264Context *h = avctx->priv_data;
395  int ret;
396 
397  ret = h264_init_context(avctx, h);
398  if (ret < 0)
399  return ret;
400 
401  ret = ff_thread_once(&h264_vlc_init, ff_h264_decode_init_vlc);
402  if (ret != 0) {
403  av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
404  return AVERROR_UNKNOWN;
405  }
406 
407  if (avctx->ticks_per_frame == 1) {
408  if(h->avctx->time_base.den < INT_MAX/2) {
409  h->avctx->time_base.den *= 2;
410  } else
411  h->avctx->time_base.num /= 2;
412  }
413  avctx->ticks_per_frame = 2;
414 
415  if (avctx->extradata_size > 0 && avctx->extradata) {
417  &h->ps, &h->is_avc, &h->nal_length_size,
418  avctx->err_recognition, avctx);
419  if (ret < 0) {
420  h264_decode_end(avctx);
421  return ret;
422  }
423  }
424 
425  if (h->ps.sps && h->ps.sps->bitstream_restriction_flag &&
428  }
429 
430  avctx->internal->allocate_progress = 1;
431 
433 
434  if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
435  h->enable_er = 0;
436 
437  if (h->enable_er && (avctx->active_thread_type & FF_THREAD_SLICE)) {
438  av_log(avctx, AV_LOG_WARNING,
439  "Error resilience with slice threads is enabled. It is unsafe and unsupported and may crash. "
440  "Use it at your own risk\n");
441  }
442 
443  return 0;
444 }
445 
446 #if HAVE_THREADS
447 static int decode_init_thread_copy(AVCodecContext *avctx)
448 {
449  H264Context *h = avctx->priv_data;
450  int ret;
451 
452  if (!avctx->internal->is_copy)
453  return 0;
454 
455  memset(h, 0, sizeof(*h));
456 
457  ret = h264_init_context(avctx, h);
458  if (ret < 0)
459  return ret;
460 
461  h->context_initialized = 0;
462 
463  return 0;
464 }
465 #endif
466 
467 /**
468  * instantaneous decoder refresh.
469  */
470 static void idr(H264Context *h)
471 {
472  int i;
474  h->poc.prev_frame_num =
475  h->poc.prev_frame_num_offset = 0;
476  h->poc.prev_poc_msb = 1<<16;
477  h->poc.prev_poc_lsb = 0;
478  for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
479  h->last_pocs[i] = INT_MIN;
480 }
481 
482 /* forget old pics after a seek */
484 {
485  int i, j;
486 
487  h->next_outputed_poc = INT_MIN;
488  h->prev_interlaced_frame = 1;
489  idr(h);
490 
491  h->poc.prev_frame_num = -1;
492  if (h->cur_pic_ptr) {
493  h->cur_pic_ptr->reference = 0;
494  for (j=i=0; h->delayed_pic[i]; i++)
495  if (h->delayed_pic[i] != h->cur_pic_ptr)
496  h->delayed_pic[j++] = h->delayed_pic[i];
497  h->delayed_pic[j] = NULL;
498  }
500 
501  h->first_field = 0;
502  h->recovery_frame = -1;
503  h->frame_recovered = 0;
504  h->current_slice = 0;
505  h->mmco_reset = 1;
506 }
507 
508 /* forget old pics after a seek */
509 static void flush_dpb(AVCodecContext *avctx)
510 {
511  H264Context *h = avctx->priv_data;
512  int i;
513 
514  memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
515 
517  ff_h264_sei_uninit(&h->sei);
518 
519  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
520  ff_h264_unref_picture(h, &h->DPB[i]);
521  h->cur_pic_ptr = NULL;
523 
524  h->mb_y = 0;
525 
527  h->context_initialized = 0;
528 }
529 
531 {
532  int nals_needed = 0;
533  int first_slice = 0;
534  int i, ret;
535 
536  for (i = 0; i < h->pkt.nb_nals; i++) {
537  H2645NAL *nal = &h->pkt.nals[i];
538  GetBitContext gb;
539 
540  /* packets can sometimes contain multiple PPS/SPS,
541  * e.g. two PAFF field pictures in one packet, or a demuxer
542  * which splits NALs strangely if so, when frame threading we
543  * can't start the next thread until we've read all of them */
544  switch (nal->type) {
545  case H264_NAL_SPS:
546  case H264_NAL_PPS:
547  nals_needed = i;
548  break;
549  case H264_NAL_DPA:
550  case H264_NAL_IDR_SLICE:
551  case H264_NAL_SLICE:
552  ret = init_get_bits8(&gb, nal->data + 1, nal->size - 1);
553  if (ret < 0) {
554  av_log(h->avctx, AV_LOG_ERROR, "Invalid zero-sized VCL NAL unit\n");
556  return ret;
557 
558  break;
559  }
560  if (!get_ue_golomb_long(&gb) || // first_mb_in_slice
561  !first_slice ||
562  first_slice != nal->type)
563  nals_needed = i;
564  if (!first_slice)
565  first_slice = nal->type;
566  }
567  }
568 
569  return nals_needed;
570 }
571 
572 static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
573 {
574  av_log(logctx, AV_LOG_DEBUG, "Green Metadata Info SEI message\n");
575  av_log(logctx, AV_LOG_DEBUG, " green_metadata_type: %d\n", gm->green_metadata_type);
576 
577  if (gm->green_metadata_type == 0) {
578  av_log(logctx, AV_LOG_DEBUG, " green_metadata_period_type: %d\n", gm->period_type);
579 
580  if (gm->period_type == 2)
581  av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_seconds: %d\n", gm->num_seconds);
582  else if (gm->period_type == 3)
583  av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_pictures: %d\n", gm->num_pictures);
584 
585  av_log(logctx, AV_LOG_DEBUG, " SEI GREEN Complexity Metrics: %f %f %f %f\n",
586  (float)gm->percent_non_zero_macroblocks/255,
587  (float)gm->percent_intra_coded_macroblocks/255,
588  (float)gm->percent_six_tap_filtering/255,
590 
591  } else if (gm->green_metadata_type == 1) {
592  av_log(logctx, AV_LOG_DEBUG, " xsd_metric_type: %d\n", gm->xsd_metric_type);
593 
594  if (gm->xsd_metric_type == 0)
595  av_log(logctx, AV_LOG_DEBUG, " xsd_metric_value: %f\n",
596  (float)gm->xsd_metric_value/100);
597  }
598 }
599 
600 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
601 {
602  AVCodecContext *const avctx = h->avctx;
603  int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
604  int idr_cleared=0;
605  int i, ret = 0;
606 
607  h->has_slice = 0;
608  h->nal_unit_type= 0;
609 
610  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
611  h->current_slice = 0;
612  if (!h->first_field)
613  h->cur_pic_ptr = NULL;
614  ff_h264_sei_uninit(&h->sei);
615  }
616 
617  if (h->nal_length_size == 4) {
618  if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
619  h->is_avc = 0;
620  }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
621  h->is_avc = 1;
622  }
623 
624  ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc,
625  h->nal_length_size, avctx->codec_id, avctx->flags2 & AV_CODEC_FLAG2_FAST);
626  if (ret < 0) {
627  av_log(avctx, AV_LOG_ERROR,
628  "Error splitting the input into NAL units.\n");
629  return ret;
630  }
631 
632  if (avctx->active_thread_type & FF_THREAD_FRAME)
633  nals_needed = get_last_needed_nal(h);
634  if (nals_needed < 0)
635  return nals_needed;
636 
637  for (i = 0; i < h->pkt.nb_nals; i++) {
638  H2645NAL *nal = &h->pkt.nals[i];
639  int max_slice_ctx, err;
640 
641  if (avctx->skip_frame >= AVDISCARD_NONREF &&
642  nal->ref_idc == 0 && nal->type != H264_NAL_SEI)
643  continue;
644 
645  // FIXME these should stop being context-global variables
646  h->nal_ref_idc = nal->ref_idc;
647  h->nal_unit_type = nal->type;
648 
649  err = 0;
650  switch (nal->type) {
651  case H264_NAL_IDR_SLICE:
652  if ((nal->data[1] & 0xFC) == 0x98) {
653  av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
654  h->next_outputed_poc = INT_MIN;
655  ret = -1;
656  goto end;
657  }
658  if(!idr_cleared) {
659  if (h->current_slice && (avctx->active_thread_type & FF_THREAD_SLICE)) {
660  av_log(h, AV_LOG_ERROR, "invalid mixed IDR / non IDR frames cannot be decoded in slice multithreading mode\n");
661  ret = AVERROR_INVALIDDATA;
662  goto end;
663  }
664  idr(h); // FIXME ensure we don't lose some frames if there is reordering
665  }
666  idr_cleared = 1;
667  h->has_recovery_point = 1;
668  case H264_NAL_SLICE:
669  h->has_slice = 1;
670 
671  if ((err = ff_h264_queue_decode_slice(h, nal))) {
673  sl->ref_count[0] = sl->ref_count[1] = 0;
674  break;
675  }
676 
677  if (h->current_slice == 1) {
678  if (avctx->active_thread_type & FF_THREAD_FRAME &&
679  i >= nals_needed && !h->setup_finished && h->cur_pic_ptr) {
680  ff_thread_finish_setup(avctx);
681  h->setup_finished = 1;
682  }
683 
684  if (h->avctx->hwaccel &&
685  (ret = h->avctx->hwaccel->start_frame(h->avctx, buf, buf_size)) < 0)
686  goto end;
687  }
688 
689  max_slice_ctx = avctx->hwaccel ? 1 : h->nb_slice_ctx;
690  if (h->nb_slice_ctx_queued == max_slice_ctx) {
691  if (h->avctx->hwaccel) {
692  ret = avctx->hwaccel->decode_slice(avctx, nal->raw_data, nal->raw_size);
693  h->nb_slice_ctx_queued = 0;
694  } else
696  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
697  goto end;
698  }
699  break;
700  case H264_NAL_DPA:
701  case H264_NAL_DPB:
702  case H264_NAL_DPC:
703  avpriv_request_sample(avctx, "data partitioning");
704  break;
705  case H264_NAL_SEI:
706  ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
708  if (avctx->debug & FF_DEBUG_GREEN_MD)
710  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
711  goto end;
712  break;
713  case H264_NAL_SPS: {
714  GetBitContext tmp_gb = nal->gb;
715  if (avctx->hwaccel && avctx->hwaccel->decode_params) {
716  ret = avctx->hwaccel->decode_params(avctx,
717  nal->type,
718  nal->raw_data,
719  nal->raw_size);
720  if (ret < 0)
721  goto end;
722  }
723  if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
724  break;
726  "SPS decoding failure, trying again with the complete NAL\n");
727  init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
728  if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
729  break;
730  ff_h264_decode_seq_parameter_set(&nal->gb, avctx, &h->ps, 1);
731  break;
732  }
733  case H264_NAL_PPS:
734  if (avctx->hwaccel && avctx->hwaccel->decode_params) {
735  ret = avctx->hwaccel->decode_params(avctx,
736  nal->type,
737  nal->raw_data,
738  nal->raw_size);
739  if (ret < 0)
740  goto end;
741  }
742  ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
743  nal->size_bits);
744  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
745  goto end;
746  break;
747  case H264_NAL_AUD:
749  case H264_NAL_END_STREAM:
751  case H264_NAL_SPS_EXT:
753  break;
754  default:
755  av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
756  nal->type, nal->size_bits);
757  }
758 
759  if (err < 0) {
760  av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
761  }
762  }
763 
765  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
766  goto end;
767 
768  ret = 0;
769 end:
770 
771 #if CONFIG_ERROR_RESILIENCE
772  /*
773  * FIXME: Error handling code does not seem to support interlaced
774  * when slices span multiple rows
775  * The ff_er_add_slice calls don't work right for bottom
776  * fields; they cause massive erroneous error concealing
777  * Error marking covers both fields (top and bottom).
778  * This causes a mismatched s->error_count
779  * and a bad error table. Further, the error count goes to
780  * INT_MAX when called for bottom field, because mb_y is
781  * past end by one (callers fault) and resync_mb_y != 0
782  * causes problems for the first MB line, too.
783  */
784  if (!FIELD_PICTURE(h) && h->current_slice &&
785  h->ps.sps == (const SPS*)h->ps.sps_list[h->ps.pps->sps_id]->data &&
786  h->enable_er) {
787 
788  H264SliceContext *sl = h->slice_ctx;
789  int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
790 
792 
793  if (use_last_pic) {
795  sl->ref_list[0][0].parent = &h->last_pic_for_ec;
796  memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
797  memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
799  } else if (sl->ref_count[0]) {
800  ff_h264_set_erpic(&sl->er.last_pic, sl->ref_list[0][0].parent);
801  } else
803 
804  if (sl->ref_count[1])
805  ff_h264_set_erpic(&sl->er.next_pic, sl->ref_list[1][0].parent);
806 
807  sl->er.ref_count = sl->ref_count[0];
808 
809  ff_er_frame_end(&sl->er);
810  if (use_last_pic)
811  memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
812  }
813 #endif /* CONFIG_ERROR_RESILIENCE */
814  /* clean up */
815  if (h->cur_pic_ptr && !h->droppable && h->has_slice) {
818  }
819 
820  return (ret < 0) ? ret : buf_size;
821 }
822 
823 /**
824  * Return the number of bytes consumed for building the current frame.
825  */
826 static int get_consumed_bytes(int pos, int buf_size)
827 {
828  if (pos == 0)
829  pos = 1; // avoid infinite loops (I doubt that is needed but...)
830  if (pos + 10 > buf_size)
831  pos = buf_size; // oops ;)
832 
833  return pos;
834 }
835 
837 {
838  AVFrame *src = srcp->f;
839  int ret;
840 
841  ret = av_frame_ref(dst, src);
842  if (ret < 0)
843  return ret;
844 
845  av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(&h->sei.frame_packing), 0);
846 
847  if (srcp->sei_recovery_frame_cnt == 0)
848  dst->key_frame = 1;
849 
850  return 0;
851 }
852 
853 static int is_extra(const uint8_t *buf, int buf_size)
854 {
855  int cnt= buf[5]&0x1f;
856  const uint8_t *p= buf+6;
857  while(cnt--){
858  int nalsize= AV_RB16(p) + 2;
859  if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
860  return 0;
861  p += nalsize;
862  }
863  cnt = *(p++);
864  if(!cnt)
865  return 0;
866  while(cnt--){
867  int nalsize= AV_RB16(p) + 2;
868  if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8)
869  return 0;
870  p += nalsize;
871  }
872  return 1;
873 }
874 
875 static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
876 {
877  int ret;
878 
881  out->recovered)) {
882 
883  if (!h->avctx->hwaccel &&
884  (out->field_poc[0] == INT_MAX ||
885  out->field_poc[1] == INT_MAX)
886  ) {
887  int p;
888  AVFrame *f = out->f;
889  int field = out->field_poc[0] == INT_MAX;
890  uint8_t *dst_data[4];
891  int linesizes[4];
892  const uint8_t *src_data[4];
893 
894  av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
895 
896  for (p = 0; p<4; p++) {
897  dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
898  src_data[p] = f->data[p] + field *f->linesize[p];
899  linesizes[p] = 2*f->linesize[p];
900  }
901 
902  av_image_copy(dst_data, linesizes, src_data, linesizes,
903  f->format, f->width, f->height>>1);
904  }
905 
906  ret = output_frame(h, dst, out);
907  if (ret < 0)
908  return ret;
909 
910  *got_frame = 1;
911 
912  if (CONFIG_MPEGVIDEO) {
914  out->mb_type,
915  out->qscale_table,
916  out->motion_val,
917  NULL,
918  h->mb_width, h->mb_height, h->mb_stride, 1);
919  }
920  }
921 
922  return 0;
923 }
924 
925 static int send_next_delayed_frame(H264Context *h, AVFrame *dst_frame,
926  int *got_frame, int buf_index)
927 {
928  int ret, i, out_idx;
929  H264Picture *out = h->delayed_pic[0];
930 
931  h->cur_pic_ptr = NULL;
932  h->first_field = 0;
933 
934  out_idx = 0;
935  for (i = 1;
936  h->delayed_pic[i] &&
937  !h->delayed_pic[i]->f->key_frame &&
938  !h->delayed_pic[i]->mmco_reset;
939  i++)
940  if (h->delayed_pic[i]->poc < out->poc) {
941  out = h->delayed_pic[i];
942  out_idx = i;
943  }
944 
945  for (i = out_idx; h->delayed_pic[i]; i++)
946  h->delayed_pic[i] = h->delayed_pic[i + 1];
947 
948  if (out) {
949  out->reference &= ~DELAYED_PIC_REF;
950  ret = finalize_frame(h, dst_frame, out, got_frame);
951  if (ret < 0)
952  return ret;
953  }
954 
955  return buf_index;
956 }
957 
958 static int h264_decode_frame(AVCodecContext *avctx, void *data,
959  int *got_frame, AVPacket *avpkt)
960 {
961  const uint8_t *buf = avpkt->data;
962  int buf_size = avpkt->size;
963  H264Context *h = avctx->priv_data;
964  AVFrame *pict = data;
965  int buf_index;
966  int ret;
967 
968  h->flags = avctx->flags;
969  h->setup_finished = 0;
970  h->nb_slice_ctx_queued = 0;
971 
973 
974  /* end of stream, output what is still in the buffers */
975  if (buf_size == 0)
976  return send_next_delayed_frame(h, pict, got_frame, 0);
977 
979  int side_size;
980  uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
981  if (is_extra(side, side_size))
982  ff_h264_decode_extradata(side, side_size,
983  &h->ps, &h->is_avc, &h->nal_length_size,
984  avctx->err_recognition, avctx);
985  }
986  if(h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC && (buf[5]&0x1F) && buf[8]==0x67){
987  if (is_extra(buf, buf_size))
988  return ff_h264_decode_extradata(buf, buf_size,
989  &h->ps, &h->is_avc, &h->nal_length_size,
990  avctx->err_recognition, avctx);
991  }
992 
993  buf_index = decode_nal_units(h, buf, buf_size);
994  if (buf_index < 0)
995  return AVERROR_INVALIDDATA;
996 
998  av_assert0(buf_index <= buf_size);
999  return send_next_delayed_frame(h, pict, got_frame, buf_index);
1000  }
1001 
1002  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && (!h->cur_pic_ptr || !h->has_slice)) {
1003  if (avctx->skip_frame >= AVDISCARD_NONREF ||
1004  buf_size >= 4 && !memcmp("Q264", buf, 4))
1005  return buf_size;
1006  av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1007  return AVERROR_INVALIDDATA;
1008  }
1009 
1010  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
1011  (h->mb_y >= h->mb_height && h->mb_height)) {
1012  if ((ret = ff_h264_field_end(h, &h->slice_ctx[0], 0)) < 0)
1013  return ret;
1014 
1015  /* Wait for second field. */
1016  if (h->next_output_pic) {
1017  ret = finalize_frame(h, pict, h->next_output_pic, got_frame);
1018  if (ret < 0)
1019  return ret;
1020  }
1021  }
1022 
1023  av_assert0(pict->buf[0] || !*got_frame);
1024 
1026 
1027  return get_consumed_bytes(buf_index, buf_size);
1028 }
1029 
1030 #define OFFSET(x) offsetof(H264Context, x)
1031 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1032 static const AVOption h264_options[] = {
1033  { "is_avc", "is avc", OFFSET(is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, 0 },
1034  { "nal_length_size", "nal_length_size", OFFSET(nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, 0 },
1035  { "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
1036  { "x264_build", "Assume this x264 version if no x264 version found in any SEI", OFFSET(x264_build), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VD },
1037  { NULL },
1038 };
1039 
1040 static const AVClass h264_class = {
1041  .class_name = "H264 Decoder",
1042  .item_name = av_default_item_name,
1043  .option = h264_options,
1044  .version = LIBAVUTIL_VERSION_INT,
1045 };
1046 
1048  .name = "h264",
1049  .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1050  .type = AVMEDIA_TYPE_VIDEO,
1051  .id = AV_CODEC_ID_H264,
1052  .priv_data_size = sizeof(H264Context),
1054  .close = h264_decode_end,
1056  .capabilities = /*AV_CODEC_CAP_DRAW_HORIZ_BAND |*/ AV_CODEC_CAP_DR1 |
1059  .hw_configs = (const AVCodecHWConfigInternal*[]) {
1060 #if CONFIG_H264_DXVA2_HWACCEL
1061  HWACCEL_DXVA2(h264),
1062 #endif
1063 #if CONFIG_H264_D3D11VA_HWACCEL
1064  HWACCEL_D3D11VA(h264),
1065 #endif
1066 #if CONFIG_H264_D3D11VA2_HWACCEL
1067  HWACCEL_D3D11VA2(h264),
1068 #endif
1069 #if CONFIG_H264_NVDEC_HWACCEL
1070  HWACCEL_NVDEC(h264),
1071 #endif
1072 #if CONFIG_H264_VAAPI_HWACCEL
1073  HWACCEL_VAAPI(h264),
1074 #endif
1075 #if CONFIG_H264_VDPAU_HWACCEL
1076  HWACCEL_VDPAU(h264),
1077 #endif
1078 #if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
1079  HWACCEL_VIDEOTOOLBOX(h264),
1080 #endif
1081  NULL
1082  },
1084  .flush = flush_dpb,
1085  .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1086  .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
1088  .priv_class = &h264_class,
1089 };
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:724
struct H264Context * h264
Definition: h264dec.h:178
int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length, void *logctx, int is_nalff, int nal_length_size, enum AVCodecID codec_id, int small_padding)
Split an input packet into NAL units.
Definition: h2645_parse.c:346
#define NULL
Definition: coverity.c:32
int(* start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Called at the beginning of each frame or field picture.
Definition: avcodec.h:3640
int workaround_bugs
Definition: h264dec.h:367
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int sei_recovery_frame_cnt
Definition: h264dec.h:163
#define AV_NUM_DATA_POINTERS
Definition: frame.h:219
#define SLICE_FLAG_ALLOW_FIELD
allow draw_horiz_band() with field slices (MPEG-2 field pics)
Definition: avcodec.h:1999
int ff_h264_queue_decode_slice(H264Context *h, const H2645NAL *nal)
Submit a slice for decoding.
Definition: h264_slice.c:2027
H264POCContext poc
Definition: h264dec.h:460
static int send_next_delayed_frame(H264Context *h, AVFrame *dst_frame, int *got_frame, int buf_index)
Definition: h264dec.c:925
int mb_num
Definition: h264dec.h:437
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2384
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:524
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
#define FF_ALLOCZ_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)
Definition: internal.h:167
int recovery_frame_cnt
recovery_frame_cnt
Definition: h264_sei.h:114
#define HWACCEL_D3D11VA2(codec)
Definition: hwaccel.h:69
int16_t mv_cache[2][5 *8][2]
Motion vector cache.
Definition: h264dec.h:299
AVOption.
Definition: opt.h:246
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int size
Definition: h2645_parse.h:34
#define HWACCEL_NVDEC(codec)
Definition: hwaccel.h:71
int edge_emu_buffer_allocated
Definition: h264dec.h:287
uint16_t num_pictures
Definition: h264_sei.h:143
static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
Definition: h264dec.c:572
int first_field
Definition: h264dec.h:408
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVBufferRef * sps_list[MAX_SPS_COUNT]
Definition: h264_ps.h:139
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:410
const char * desc
Definition: nvenc.c:65
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint16_t * cbp_table
Definition: h264dec.h:413
void ff_er_frame_end(ERContext *s)
Sequence parameter set.
Definition: h264_ps.h:44
int mb_y
Definition: h264dec.h:434
int bitstream_restriction_flag
Definition: h264_ps.h:85
int num
Numerator.
Definition: rational.h:59
int bipred_scratchpad_allocated
Definition: h264dec.h:286
int size
Definition: avcodec.h:1433
#define DELAYED_PIC_REF
Value of Picture.reference when Picture is not a reference picture, but is held for delayed output...
Definition: diracdec.c:67
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVBufferPool * mb_type_pool
Definition: h264dec.h:550
static void idr(H264Context *h)
instantaneous decoder refresh.
Definition: h264dec.c:470
int16_t(*[2] motion_val)[2]
Definition: h264dec.h:136
int flags
Definition: h264dec.h:366
void ff_h264_flush_change(H264Context *h)
Definition: h264dec.c:483
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1729
int mb_height
Definition: h264dec.h:435
H264Picture * delayed_pic[MAX_DELAYED_PIC_COUNT+2]
Definition: h264dec.h:465
int is_avc
Used to parse AVC variant of H.264.
Definition: h264dec.h:450
AVBufferPool * ref_index_pool
Definition: h264dec.h:552
int height_from_caller
Definition: h264dec.h:543
void ff_h264_sei_uninit(H264SEIContext *h)
Reset SEI values at the beginning of the frame.
Definition: h264_sei.c:41
ERPicture last_pic
H264Context.
Definition: h264dec.h:337
AVFrame * f
Definition: h264dec.h:129
#define AV_CODEC_FLAG2_CHUNKS
Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries...
Definition: avcodec.h:922
#define HWACCEL_D3D11VA(codec)
Definition: hwaccel.h:79
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2676
#define src
Definition: vp8dsp.c:254
AVCodec.
Definition: avcodec.h:3410
int picture_structure
Definition: h264dec.h:407
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
static void flush_dpb(AVCodecContext *avctx)
Definition: h264dec.c:509
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264dec.h:267
int size_bits
Size, in bits, of just the data, excluding the stop bit and any trailing padding. ...
Definition: h2645_parse.h:41
H264SEIGreenMetaData green_metadata
Definition: h264_sei.h:166
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1642
int ff_h264_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: h264_slice.c:288
uint8_t * chroma_pred_mode_table
Definition: h264dec.h:416
int setup_finished
Definition: h264dec.h:534
void ff_h264_remove_all_refs(H264Context *h)
Definition: h264_refs.c:563
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:2977
int ff_h264_execute_decode_slices(H264Context *h)
Call decode_slice() for each context.
Definition: h264_slice.c:2738
H264SEIContext sei
Definition: h264dec.h:547
int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
Definition: h264dec.c:60
const char * ff_h264_sei_stereo_mode(const H264SEIFramePacking *h)
Get stereo_mode string from the h264 frame_packing_arrangement.
Definition: h264_sei.c:472
BYTE int const BYTE * srcp
Definition: avisynth_c.h:813
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:986
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static int get_consumed_bytes(int pos, int buf_size)
Return the number of bytes consumed for building the current frame.
Definition: h264dec.c:826
ptrdiff_t b8_stride
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
const PPS * pps
Definition: h264_ps.h:145
#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
uint8_t
#define av_cold
Definition: attributes.h:82
uint8_t green_metadata_type
Definition: h264_sei.h:140
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:189
AVOptions.
void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
Definition: h264_picture.c:131
void ff_h264_hl_decode_mb(const H264Context *h, H264SliceContext *sl)
Definition: h264_mb.c:799
int poc
frame POC
Definition: h264dec.h:148
#define f(width, name)
Definition: cbs_vp9.c:255
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
Multithreading support functions.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:441
static int get_last_needed_nal(H264Context *h)
Definition: h264dec.c:530
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1620
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
uint8_t(*[2] top_borders)[(16 *3)*2]
Definition: h264dec.h:285
void ff_h2645_packet_uninit(H2645Packet *pkt)
Free all the allocated memory in the packet.
Definition: h2645_parse.c:469
ERPicture cur_pic
int frame_recovered
Initial frame has been completely recovered.
Definition: h264dec.h:524
int ff_h264_decode_extradata(const uint8_t *data, int size, H264ParamSets *ps, int *is_avc, int *nal_length_size, int err_recognition, void *logctx)
Definition: h264_parse.c:443
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
#define height
uint8_t * data
Definition: avcodec.h:1432
#define HWACCEL_DXVA2(codec)
Definition: hwaccel.h:67
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
Definition: h264dec.c:600
AVDictionary * metadata
metadata.
Definition: frame.h:505
int has_slice
slice NAL is found in the packet, set by decode_nal_units, its state does not need to be preserved ou...
Definition: h264dec.h:445
static int h264_init_context(AVCodecContext *avctx, H264Context *h)
Definition: h264dec.c:303
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
H264Picture * parent
Definition: h264dec.h:174
high precision timer, useful to profile code
int recovered
picture at IDR or recovery point + recovery count
Definition: h264dec.h:161
#define AVOnce
Definition: thread.h:159
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2157
#define av_log(a,...)
int last_pocs[MAX_DELAYED_PIC_COUNT]
Definition: h264dec.h:466
uint16_t num_seconds
Definition: h264_sei.h:142
uint8_t percent_six_tap_filtering
Definition: h264_sei.h:146
H.264 common definitions.
void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl, int y, int height)
Definition: h264dec.c:102
H.264 parameter set handling.
H264Picture DPB[H264_MAX_PICTURE_COUNT]
Definition: h264dec.h:345
int width
Definition: frame.h:276
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:1809
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
static const AVClass h264_class
Definition: h264dec.c:1040
int16_t * dc_val_base
Definition: h264dec.h:281
int context_initialized
Definition: h264dec.h:365
ERContext er
Definition: h264dec.h:180
int nal_unit_type
Definition: h264dec.h:443
int num_reorder_frames
Definition: h264_ps.h:86
int is_copy
Whether the parent AVCodecContext is a copy of the context which had init() called on it...
Definition: internal.h:136
#define AVERROR(e)
Definition: error.h:43
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:350
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static const AVOption h264_options[]
Definition: h264dec.c:1032
Display matrix.
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:2790
H2645Packet pkt
Definition: h264dec.h:354
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
#define FIELD_PICTURE(h)
Definition: h264dec.h:74
void(* decode_mb)(void *opaque, int ref, int mv_dir, int mv_type, int(*mv)[2][4][2], int mb_x, int mb_y, int mb_intra, int mb_skipped)
uint8_t(*[2] mvd_table)[2]
Definition: h264dec.h:417
static av_cold int h264_decode_end(AVCodecContext *avctx)
Definition: h264dec.c:358
int prev_interlaced_frame
Complement sei_pic_struct SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced...
Definition: h264dec.h:498
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1600
static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
Definition: h264dec.c:875
ThreadFrame tf
Definition: h264dec.h:130
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3417
H264SEIUnregistered unregistered
Definition: h264_sei.h:161
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
uint8_t * list_counts
Array of list_count per MB specifying the slice type.
Definition: h264dec.h:410
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:117
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1017
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
Definition: imgutils.c:387
int * mb_index2xy
int raw_size
Definition: h2645_parse.h:43
uint8_t percent_non_zero_macroblocks
Definition: h264_sei.h:144
#define FF_CODEC_CAP_EXPORTS_CROPPING
The decoder sets the cropping fields in the output frames manually.
Definition: internal.h:66
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:225
uint8_t * error_status_table
uint8_t * direct_table
Definition: h264dec.h:418
int nal_length_size
Number of bytes used for nal length (1, 2 or 4)
Definition: h264dec.h:451
useful rectangle filling function
uint8_t * data[3]
Definition: h264dec.h:167
int prev_poc_msb
poc_msb of the last reference pic for POC type 0
Definition: h264_parse.h:49
void(* draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)
If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band...
Definition: avcodec.h:1754
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2644
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:2782
uint32_t * mb2br_xy
Definition: h264dec.h:400
uint8_t * er_temp_buffer
#define FFMIN(a, b)
Definition: common.h:96
uint16_t * slice_table
slice_table_base + 2*mb_stride + 1
Definition: h264dec.h:403
static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type, int(*mv)[2][4][2], int mb_x, int mb_y, int mb_intra, int mb_skipped)
Definition: h264dec.c:66
int reference
Definition: h264dec.h:160
static int is_extra(const uint8_t *buf, int buf_size)
Definition: h264dec.c:853
int width
picture width / height.
Definition: avcodec.h:1692
int nb_slice_ctx
Definition: h264dec.h:351
uint32_t * mb_type
Definition: h264dec.h:139
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:2783
Context Adaptive Binary Arithmetic Coder inline functions.
H.264 / AVC / MPEG-4 part10 codec.
int mmco_reset
Definition: h264dec.h:475
H264SliceContext * slice_ctx
Definition: h264dec.h:350
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2655
int reference
Definition: h264dec.h:170
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:1651
int top_borders_allocated[2]
Definition: h264dec.h:288
static void fill_rectangle(int x, int y, int w, int h)
Definition: ffplay.c:822
int ref_idc
H.264 only, nal_ref_idc.
Definition: h2645_parse.h:64
void ff_print_debug_info2(AVCodecContext *avctx, AVFrame *pict, uint8_t *mbskip_table, uint32_t *mbtype_table, int8_t *qscale_table, int16_t(*motion_val[2])[2], int *low_delay, int mb_width, int mb_height, int mb_stride, int quarter_sample)
Print debugging info for the given picture.
Definition: mpegutils.c:103
int type
NAL unit type.
Definition: h2645_parse.h:51
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2771
uint8_t * edge_emu_buffer
Definition: h264dec.h:284
static unsigned get_ue_golomb_long(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to UINT32_MAX-1.
Definition: golomb.h:85
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1021
static const int8_t mv[256][2]
Definition: 4xm.c:77
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:291
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1160
int mb_stride
Definition: h264dec.h:436
AVCodecContext * avctx
Definition: h264dec.h:339
#define AV_ONCE_INIT
Definition: thread.h:160
Libavcodec external API header.
#define MAX_DELAYED_PIC_COUNT
Definition: h264dec.h:56
enum AVCodecID codec_id
Definition: avcodec.h:1530
AVCodec ff_h264_decoder
Definition: h264dec.c:1047
ERPicture next_pic
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
int next_outputed_poc
Definition: h264dec.h:468
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:464
int field_poc[2]
top/bottom POC
Definition: h264dec.h:147
#define AV_CODEC_FLAG2_FAST
Allow non spec compliant speedup tricks.
Definition: avcodec.h:903
int debug
debug
Definition: avcodec.h:2600
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
int recovery_frame
recovery_frame is the frame_num at which the next frame should be fully constructed.
Definition: h264dec.h:511
main external API structure.
Definition: avcodec.h:1520
uint8_t * data
The data buffer.
Definition: buffer.h:89
const uint8_t * data
Definition: h2645_parse.h:35
static AVOnce h264_vlc_init
Definition: h264dec.c:390
void * buf
Definition: avisynth_c.h:690
int8_t * qscale_table
Definition: h264dec.h:133
static const uint8_t scan8[16 *3+3]
Definition: h264dec.h:644
int extradata_size
Definition: avcodec.h:1621
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
int slice_flags
slice flags
Definition: avcodec.h:1997
static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
Definition: h264dec.c:836
Describe the class of an AVClass context structure.
Definition: log.h:67
int prev_frame_num
frame_num of the last pic for POC type 1/2
Definition: h264_parse.h:53
uint8_t non_zero_count_cache[15 *8]
non zero coeff count cache.
Definition: h264dec.h:294
void av_buffer_pool_uninit(AVBufferPool **ppool)
Mark the pool as being available for freeing.
Definition: buffer.c:275
static av_always_inline uint32_t pack16to32(unsigned a, unsigned b)
Definition: h264dec.h:660
int8_t * ref_index[2]
Definition: h264dec.h:145
av_cold void ff_h264_decode_init_vlc(void)
Definition: h264_cavlc.c:327
int mmco_reset
MMCO_RESET set this 1.
Definition: h264dec.h:150
H264Picture * cur_pic_ptr
Definition: h264dec.h:346
#define FMO
Definition: h264dec.h:62
int mb_mbaff
mb_aff_frame && mb_field_decoding_flag
Definition: h264dec.h:242
#define FF_DEBUG_GREEN_MD
Definition: avcodec.h:2624
int enable_er
Definition: h264dec.h:545
uint8_t percent_intra_coded_macroblocks
Definition: h264_sei.h:145
const SPS * sps
Definition: h264_ps.h:146
unsigned int sps_id
Definition: h264_ps.h:110
int width_from_caller
Definition: h264dec.h:542
int allocate_progress
Whether to allocate progress for frame threading.
Definition: internal.h:151
H264SEIRecoveryPoint recovery_point
Definition: h264_sei.h:162
AVCodecContext * avctx
#define HWACCEL_VAAPI(codec)
Definition: hwaccel.h:73
int linesize[3]
Definition: h264dec.h:168
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
int prev_poc_lsb
poc_lsb of the last reference pic for POC type 0
Definition: h264_parse.h:50
uint8_t xsd_metric_type
Definition: h264_sei.h:148
int ff_h264_alloc_tables(H264Context *h)
Allocate tables.
Definition: h264dec.c:180
int has_recovery_point
Definition: h264dec.h:526
uint16_t xsd_metric_value
Definition: h264_sei.h:149
int nb_slice_ctx_queued
Definition: h264dec.h:352
discard all non reference
Definition: avcodec.h:792
int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
Definition: h264_picture.c:154
AVBufferPool * qscale_table_pool
Definition: h264dec.h:549
H264Picture * next_output_pic
Definition: h264dec.h:467
AVBufferPool * motion_val_pool
Definition: h264dec.h:551
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:279
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
#define FF_ALLOC_OR_GOTO(ctx, p, size, label)
Definition: internal.h:140
uint16_t * slice_table_base
Definition: h264dec.h:458
#define OFFSET(x)
Definition: h264dec.c:1030
H264ParamSets ps
Definition: h264dec.h:456
int16_t * dc_val[3]
H264SEIFramePacking frame_packing
Definition: h264_sei.h:164
H.264 / AVC / MPEG-4 part10 motion vector prediction.
Stereoscopic video.
int workaround_bugs
Work around bugs in encoders which sometimes cannot be detected automatically.
Definition: avcodec.h:2549
const AVProfile ff_h264_profiles[]
Definition: profiles.c:58
int cur_chroma_format_idc
Definition: h264dec.h:536
int8_t * intra4x4_pred_mode
Definition: h264dec.h:206
int den
Denominator.
Definition: rational.h:60
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:316
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
static int h264_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: h264dec.c:958
GetBitContext gb
Definition: h2645_parse.h:46
#define VD
Definition: h264dec.c:1031
void ff_h264_free_tables(H264Context *h)
Definition: h264dec.c:137
void * priv_data
Definition: avcodec.h:1547
const uint8_t * raw_data
Definition: h2645_parse.h:44
#define PICT_FRAME
Definition: mpegutils.h:39
int8_t ref_cache[2][5 *8]
Definition: h264dec.h:300
#define AV_CODEC_FLAG_OUTPUT_CORRUPT
Output even those frames that might be corrupted.
Definition: avcodec.h:843
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:333
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:1555
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:162
H2645NAL * nals
Definition: h2645_parse.h:75
H264Picture cur_pic
Definition: h264dec.h:347
#define PART_NOT_AVAILABLE
Definition: h264dec.h:391
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:296
int mb_width
Definition: h264dec.h:435
int current_slice
current slice number, used to initialize slice_num of each thread/context
Definition: h264dec.h:488
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1607
uint32_t * mb2b_xy
Definition: h264dec.h:399
H264Ref ref_list[2][48]
0..15: frame refs, 16..47: mbaff field refs.
Definition: h264dec.h:269
static av_cold int h264_decode_init(AVCodecContext *avctx)
Definition: h264dec.c:392
H264Picture last_pic_for_ec
Definition: h264dec.h:348
int height
Definition: frame.h:276
#define AV_CODEC_FLAG2_SHOW_ALL
Show all frames before the first keyframe.
Definition: avcodec.h:931
FILE * out
Definition: movenc.c:54
uint8_t(*[2] mvd_table)[2]
Definition: h264dec.h:313
#define av_freep(p)
#define HWACCEL_VDPAU(codec)
Definition: hwaccel.h:75
int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, const H264ParamSets *ps, void *logctx)
Definition: h264_sei.c:397
int prev_frame_num_offset
for POC type 2
Definition: h264_parse.h:52
int8_t * intra4x4_pred_mode
Definition: h264dec.h:385
int ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
Init context Allocate buffers which are not shared amongst multiple threads.
Definition: h264dec.c:238
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3668
ptrdiff_t mb_stride
int mb_field_decoding_flag
Definition: h264dec.h:241
uint8_t(* non_zero_count)[48]
Definition: h264dec.h:388
exp golomb vlc stuff
uint8_t * bipred_scratchpad
Definition: h264dec.h:283
void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
Definition: h264_picture.c:45
This structure stores compressed data.
Definition: avcodec.h:1409
int droppable
Definition: h264dec.h:362
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:961
int arrangement_cancel_flag
is previous arrangement canceled, -1 if never received
Definition: h264_sei.h:125
int nal_ref_idc
Definition: h264dec.h:442
for(j=16;j >0;--j)
#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)
Definition: internal.h:149
int b_stride
Definition: h264dec.h:401
const uint16_t ff_h264_mb_sizes[4]
Definition: h264dec.c:58
int(* decode_params)(AVCodecContext *avctx, int type, const uint8_t *buf, uint32_t buf_size)
Callback for parameter data (SPS/PPS/VPS etc).
Definition: avcodec.h:3654
Context Adaptive Binary Arithmetic Coder.
#define H264_MAX_PICTURE_COUNT
Definition: h264dec.h:52
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:191
uint8_t percent_alpha_point_deblocking_instance
Definition: h264_sei.h:147