FFmpeg  4.3.7
h264dec.c
Go to the documentation of this file.
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"
36 
37 #include "internal.h"
38 #include "bytestream.h"
39 #include "cabac.h"
40 #include "cabac_functions.h"
41 #include "error_resilience.h"
42 #include "avcodec.h"
43 #include "h264.h"
44 #include "h264dec.h"
45 #include "h2645_parse.h"
46 #include "h264data.h"
47 #include "h264chroma.h"
48 #include "h264_mvpred.h"
49 #include "h264_ps.h"
50 #include "golomb.h"
51 #include "hwconfig.h"
52 #include "mathops.h"
53 #include "me_cmp.h"
54 #include "mpegutils.h"
55 #include "profiles.h"
56 #include "rectangle.h"
57 #include "thread.h"
58 
59 const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
60 
62 {
63  H264Context *h = avctx->priv_data;
64  return h && h->ps.sps ? h->ps.sps->num_reorder_frames : 0;
65 }
66 
67 static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
68  int (*mv)[2][4][2],
69  int mb_x, int mb_y, int mb_intra, int mb_skipped)
70 {
71  H264Context *h = opaque;
72  H264SliceContext *sl = &h->slice_ctx[0];
73 
74  sl->mb_x = mb_x;
75  sl->mb_y = mb_y;
76  sl->mb_xy = mb_x + mb_y * h->mb_stride;
77  memset(sl->non_zero_count_cache, 0, sizeof(sl->non_zero_count_cache));
78  av_assert1(ref >= 0);
79  /* FIXME: It is possible albeit uncommon that slice references
80  * differ between slices. We take the easy approach and ignore
81  * it for now. If this turns out to have any relevance in
82  * practice then correct remapping should be added. */
83  if (ref >= sl->ref_count[0])
84  ref = 0;
85  if (!sl->ref_list[0][ref].data[0]) {
86  av_log(h->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
87  ref = 0;
88  }
89  if ((sl->ref_list[0][ref].reference&3) != 3) {
90  av_log(h->avctx, AV_LOG_DEBUG, "Reference invalid\n");
91  return;
92  }
93  fill_rectangle(&h->cur_pic.ref_index[0][4 * sl->mb_xy],
94  2, 2, 2, ref, 1);
95  fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
96  fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
97  pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
98  sl->mb_mbaff =
99  sl->mb_field_decoding_flag = 0;
100  ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
101 }
102 
104  int y, int height)
105 {
106  AVCodecContext *avctx = h->avctx;
107  const AVFrame *src = h->cur_pic.f;
109  int vshift = desc->log2_chroma_h;
110  const int field_pic = h->picture_structure != PICT_FRAME;
111  if (field_pic) {
112  height <<= 1;
113  y <<= 1;
114  }
115 
116  height = FFMIN(height, avctx->height - y);
117 
118  if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
119  return;
120 
121  if (avctx->draw_horiz_band) {
123  int i;
124 
125  offset[0] = y * src->linesize[0];
126  offset[1] =
127  offset[2] = (y >> vshift) * src->linesize[1];
128  for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
129  offset[i] = 0;
130 
131  emms_c();
132 
133  avctx->draw_horiz_band(avctx, src, offset,
134  y, h->picture_structure, height);
135  }
136 }
137 
139 {
140  int i;
141 
144  av_freep(&h->cbp_table);
145  av_freep(&h->mvd_table[0]);
146  av_freep(&h->mvd_table[1]);
147  av_freep(&h->direct_table);
150  h->slice_table = NULL;
151  av_freep(&h->list_counts);
152 
153  av_freep(&h->mb2b_xy);
154  av_freep(&h->mb2br_xy);
155 
160 
161  for (i = 0; i < h->nb_slice_ctx; i++) {
162  H264SliceContext *sl = &h->slice_ctx[i];
163 
164  av_freep(&sl->dc_val_base);
165  av_freep(&sl->er.mb_index2xy);
167  av_freep(&sl->er.er_temp_buffer);
168 
171  av_freep(&sl->top_borders[0]);
172  av_freep(&sl->top_borders[1]);
173 
176  sl->top_borders_allocated[0] = 0;
177  sl->top_borders_allocated[1] = 0;
178  }
179 }
180 
182 {
183  const int big_mb_num = h->mb_stride * (h->mb_height + 1);
184  const int row_mb_num = 2*h->mb_stride*FFMAX(h->nb_slice_ctx, 1);
185  int x, y;
186 
188  row_mb_num, 8 * sizeof(uint8_t), fail)
190 
192  big_mb_num * 48 * sizeof(uint8_t), fail)
194  (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
196  big_mb_num * sizeof(uint16_t), fail)
198  big_mb_num * sizeof(uint8_t), fail)
200  row_mb_num, 16 * sizeof(uint8_t), fail);
202  row_mb_num, 16 * sizeof(uint8_t), fail);
203  h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
204  h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
205 
207  4 * big_mb_num * sizeof(uint8_t), fail);
209  big_mb_num * sizeof(uint8_t), fail)
210 
211  memset(h->slice_table_base, -1,
212  (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
213  h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
214 
216  big_mb_num * sizeof(uint32_t), fail);
218  big_mb_num * sizeof(uint32_t), fail);
219  for (y = 0; y < h->mb_height; y++)
220  for (x = 0; x < h->mb_width; x++) {
221  const int mb_xy = x + y * h->mb_stride;
222  const int b_xy = 4 * x + 4 * y * h->b_stride;
223 
224  h->mb2b_xy[mb_xy] = b_xy;
225  h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
226  }
227 
228  return 0;
229 
230 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
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 
313  h->workaround_bugs = avctx->workaround_bugs;
314  h->flags = avctx->flags;
315  h->poc.prev_poc_msb = 1 << 16;
316  h->recovery_frame = -1;
317  h->frame_recovered = 0;
318  h->poc.prev_frame_num = -1;
320  h->sei.unregistered.x264_build = -1;
321 
322  h->next_outputed_poc = INT_MIN;
323  for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
324  h->last_pocs[i] = INT_MIN;
325 
326  ff_h264_sei_uninit(&h->sei);
327 
328  h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? avctx->thread_count : 1;
329  h->slice_ctx = av_mallocz_array(h->nb_slice_ctx, sizeof(*h->slice_ctx));
330  if (!h->slice_ctx) {
331  h->nb_slice_ctx = 0;
332  return AVERROR(ENOMEM);
333  }
334 
335  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
336  h->DPB[i].f = av_frame_alloc();
337  if (!h->DPB[i].f)
338  return AVERROR(ENOMEM);
339  }
340 
341  h->cur_pic.f = av_frame_alloc();
342  if (!h->cur_pic.f)
343  return AVERROR(ENOMEM);
344 
346  if (!h->last_pic_for_ec.f)
347  return AVERROR(ENOMEM);
348 
349  for (i = 0; i < h->nb_slice_ctx; i++)
350  h->slice_ctx[i].h264 = h;
351 
352  return 0;
353 }
354 
356 {
357  H264Context *h = avctx->priv_data;
358  int i;
359 
362 
363  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
364  ff_h264_unref_picture(h, &h->DPB[i]);
365  av_frame_free(&h->DPB[i].f);
366  }
367  memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
368 
369  h->cur_pic_ptr = NULL;
370 
371  av_freep(&h->slice_ctx);
372  h->nb_slice_ctx = 0;
373 
374  ff_h264_sei_uninit(&h->sei);
375  ff_h264_ps_uninit(&h->ps);
376 
378 
380  av_frame_free(&h->cur_pic.f);
383 
384  return 0;
385 }
386 
388 
390 {
391  H264Context *h = avctx->priv_data;
392  int ret;
393 
394  ret = h264_init_context(avctx, h);
395  if (ret < 0)
396  return ret;
397 
398  ret = ff_thread_once(&h264_vlc_init, ff_h264_decode_init_vlc);
399  if (ret != 0) {
400  av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
401  return AVERROR_UNKNOWN;
402  }
403 
404  if (avctx->ticks_per_frame == 1) {
405  if(h->avctx->time_base.den < INT_MAX/2) {
406  h->avctx->time_base.den *= 2;
407  } else
408  h->avctx->time_base.num /= 2;
409  }
410  avctx->ticks_per_frame = 2;
411 
412  if (!avctx->internal->is_copy) {
413  if (avctx->extradata_size > 0 && avctx->extradata) {
415  &h->ps, &h->is_avc, &h->nal_length_size,
416  avctx->err_recognition, avctx);
417  if (ret < 0) {
418  int explode = avctx->err_recognition & AV_EF_EXPLODE;
419  av_log(avctx, explode ? AV_LOG_ERROR: AV_LOG_WARNING,
420  "Error decoding the extradata\n");
421  if (explode) {
422  return ret;
423  }
424  ret = 0;
425  }
426  }
427  }
428 
429  if (h->ps.sps && h->ps.sps->bitstream_restriction_flag &&
432  }
433 
435 
436  if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
437  h->enable_er = 0;
438 
439  if (h->enable_er && (avctx->active_thread_type & FF_THREAD_SLICE)) {
440  av_log(avctx, AV_LOG_WARNING,
441  "Error resilience with slice threads is enabled. It is unsafe and unsupported and may crash. "
442  "Use it at your own risk\n");
443  }
444 
445  return 0;
446 }
447 
448 /**
449  * instantaneous decoder refresh.
450  */
451 static void idr(H264Context *h)
452 {
453  int i;
455  h->poc.prev_frame_num =
456  h->poc.prev_frame_num_offset = 0;
457  h->poc.prev_poc_msb = 1<<16;
458  h->poc.prev_poc_lsb = -1;
459  for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
460  h->last_pocs[i] = INT_MIN;
461 }
462 
463 /* forget old pics after a seek */
465 {
466  int i, j;
467 
468  h->next_outputed_poc = INT_MIN;
469  h->prev_interlaced_frame = 1;
470  idr(h);
471 
472  h->poc.prev_frame_num = -1;
473  if (h->cur_pic_ptr) {
474  h->cur_pic_ptr->reference = 0;
475  for (j=i=0; h->delayed_pic[i]; i++)
476  if (h->delayed_pic[i] != h->cur_pic_ptr)
477  h->delayed_pic[j++] = h->delayed_pic[i];
478  h->delayed_pic[j] = NULL;
479  }
481 
482  h->first_field = 0;
483  h->recovery_frame = -1;
484  h->frame_recovered = 0;
485  h->current_slice = 0;
486  h->mmco_reset = 1;
487 }
488 
490 {
491  H264Context *h = avctx->priv_data;
492  int i;
493 
494  memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
495 
497  ff_h264_sei_uninit(&h->sei);
498 
499  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
500  ff_h264_unref_picture(h, &h->DPB[i]);
501  h->cur_pic_ptr = NULL;
503 
504  h->mb_y = 0;
505 
507  h->context_initialized = 0;
508 }
509 
511 {
512  int nals_needed = 0;
513  int first_slice = 0;
514  int i, ret;
515 
516  for (i = 0; i < h->pkt.nb_nals; i++) {
517  H2645NAL *nal = &h->pkt.nals[i];
518  GetBitContext gb;
519 
520  /* packets can sometimes contain multiple PPS/SPS,
521  * e.g. two PAFF field pictures in one packet, or a demuxer
522  * which splits NALs strangely if so, when frame threading we
523  * can't start the next thread until we've read all of them */
524  switch (nal->type) {
525  case H264_NAL_SPS:
526  case H264_NAL_PPS:
527  nals_needed = i;
528  break;
529  case H264_NAL_DPA:
530  case H264_NAL_IDR_SLICE:
531  case H264_NAL_SLICE:
532  ret = init_get_bits8(&gb, nal->data + 1, nal->size - 1);
533  if (ret < 0) {
534  av_log(h->avctx, AV_LOG_ERROR, "Invalid zero-sized VCL NAL unit\n");
536  return ret;
537 
538  break;
539  }
540  if (!get_ue_golomb_long(&gb) || // first_mb_in_slice
541  !first_slice ||
542  first_slice != nal->type)
543  nals_needed = i;
544  if (!first_slice)
545  first_slice = nal->type;
546  }
547  }
548 
549  return nals_needed;
550 }
551 
552 static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
553 {
554  av_log(logctx, AV_LOG_DEBUG, "Green Metadata Info SEI message\n");
555  av_log(logctx, AV_LOG_DEBUG, " green_metadata_type: %d\n", gm->green_metadata_type);
556 
557  if (gm->green_metadata_type == 0) {
558  av_log(logctx, AV_LOG_DEBUG, " green_metadata_period_type: %d\n", gm->period_type);
559 
560  if (gm->period_type == 2)
561  av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_seconds: %d\n", gm->num_seconds);
562  else if (gm->period_type == 3)
563  av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_pictures: %d\n", gm->num_pictures);
564 
565  av_log(logctx, AV_LOG_DEBUG, " SEI GREEN Complexity Metrics: %f %f %f %f\n",
566  (float)gm->percent_non_zero_macroblocks/255,
567  (float)gm->percent_intra_coded_macroblocks/255,
568  (float)gm->percent_six_tap_filtering/255,
570 
571  } else if (gm->green_metadata_type == 1) {
572  av_log(logctx, AV_LOG_DEBUG, " xsd_metric_type: %d\n", gm->xsd_metric_type);
573 
574  if (gm->xsd_metric_type == 0)
575  av_log(logctx, AV_LOG_DEBUG, " xsd_metric_value: %f\n",
576  (float)gm->xsd_metric_value/100);
577  }
578 }
579 
580 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
581 {
582  AVCodecContext *const avctx = h->avctx;
583  int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
584  int idr_cleared=0;
585  int i, ret = 0;
586 
587  h->has_slice = 0;
588  h->nal_unit_type= 0;
589 
590  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
591  h->current_slice = 0;
592  if (!h->first_field) {
593  h->cur_pic_ptr = NULL;
594  ff_h264_sei_uninit(&h->sei);
595  }
596  }
597 
598  if (h->nal_length_size == 4) {
599  if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
600  h->is_avc = 0;
601  }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
602  h->is_avc = 1;
603  }
604 
605  ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc, h->nal_length_size,
606  avctx->codec_id, 0, 0);
607  if (ret < 0) {
608  av_log(avctx, AV_LOG_ERROR,
609  "Error splitting the input into NAL units.\n");
610  return ret;
611  }
612 
613  if (avctx->active_thread_type & FF_THREAD_FRAME)
614  nals_needed = get_last_needed_nal(h);
615  if (nals_needed < 0)
616  return nals_needed;
617 
618  for (i = 0; i < h->pkt.nb_nals; i++) {
619  H2645NAL *nal = &h->pkt.nals[i];
620  int max_slice_ctx, err;
621 
622  if (avctx->skip_frame >= AVDISCARD_NONREF &&
623  nal->ref_idc == 0 && nal->type != H264_NAL_SEI)
624  continue;
625 
626  // FIXME these should stop being context-global variables
627  h->nal_ref_idc = nal->ref_idc;
628  h->nal_unit_type = nal->type;
629 
630  err = 0;
631  switch (nal->type) {
632  case H264_NAL_IDR_SLICE:
633  if ((nal->data[1] & 0xFC) == 0x98) {
634  av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
635  h->next_outputed_poc = INT_MIN;
636  ret = -1;
637  goto end;
638  }
639  if(!idr_cleared) {
640  idr(h); // FIXME ensure we don't lose some frames if there is reordering
641  }
642  idr_cleared = 1;
643  h->has_recovery_point = 1;
644  case H264_NAL_SLICE:
645  h->has_slice = 1;
646 
647  if ((err = ff_h264_queue_decode_slice(h, nal))) {
649  sl->ref_count[0] = sl->ref_count[1] = 0;
650  break;
651  }
652 
653  if (h->current_slice == 1) {
654  if (avctx->active_thread_type & FF_THREAD_FRAME &&
655  i >= nals_needed && !h->setup_finished && h->cur_pic_ptr) {
656  ff_thread_finish_setup(avctx);
657  h->setup_finished = 1;
658  }
659 
660  if (h->avctx->hwaccel &&
661  (ret = h->avctx->hwaccel->start_frame(h->avctx, buf, buf_size)) < 0)
662  goto end;
663  }
664 
665  max_slice_ctx = avctx->hwaccel ? 1 : h->nb_slice_ctx;
666  if (h->nb_slice_ctx_queued == max_slice_ctx) {
667  if (h->avctx->hwaccel) {
668  ret = avctx->hwaccel->decode_slice(avctx, nal->raw_data, nal->raw_size);
669  h->nb_slice_ctx_queued = 0;
670  } else
672  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
673  goto end;
674  }
675  break;
676  case H264_NAL_DPA:
677  case H264_NAL_DPB:
678  case H264_NAL_DPC:
679  avpriv_request_sample(avctx, "data partitioning");
680  break;
681  case H264_NAL_SEI:
682  if (h->setup_finished) {
683  avpriv_request_sample(avctx, "Late SEI");
684  break;
685  }
686  ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
688  if (avctx->debug & FF_DEBUG_GREEN_MD)
690  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
691  goto end;
692  break;
693  case H264_NAL_SPS: {
694  GetBitContext tmp_gb = nal->gb;
695  if (avctx->hwaccel && avctx->hwaccel->decode_params) {
696  ret = avctx->hwaccel->decode_params(avctx,
697  nal->type,
698  nal->raw_data,
699  nal->raw_size);
700  if (ret < 0)
701  goto end;
702  }
703  if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
704  break;
706  "SPS decoding failure, trying again with the complete NAL\n");
707  init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
708  if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
709  break;
710  ff_h264_decode_seq_parameter_set(&nal->gb, avctx, &h->ps, 1);
711  break;
712  }
713  case H264_NAL_PPS:
714  if (avctx->hwaccel && avctx->hwaccel->decode_params) {
715  ret = avctx->hwaccel->decode_params(avctx,
716  nal->type,
717  nal->raw_data,
718  nal->raw_size);
719  if (ret < 0)
720  goto end;
721  }
722  ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
723  nal->size_bits);
724  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
725  goto end;
726  break;
727  case H264_NAL_AUD:
729  case H264_NAL_END_STREAM:
731  case H264_NAL_SPS_EXT:
733  break;
734  default:
735  av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
736  nal->type, nal->size_bits);
737  }
738 
739  if (err < 0) {
740  av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
741  }
742  }
743 
745  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
746  goto end;
747 
748  // set decode_error_flags to allow users to detect concealed decoding errors
749  if ((ret < 0 || h->slice_ctx->er.error_occurred) && h->cur_pic_ptr) {
751  }
752 
753  ret = 0;
754 end:
755 
756 #if CONFIG_ERROR_RESILIENCE
757  /*
758  * FIXME: Error handling code does not seem to support interlaced
759  * when slices span multiple rows
760  * The ff_er_add_slice calls don't work right for bottom
761  * fields; they cause massive erroneous error concealing
762  * Error marking covers both fields (top and bottom).
763  * This causes a mismatched s->error_count
764  * and a bad error table. Further, the error count goes to
765  * INT_MAX when called for bottom field, because mb_y is
766  * past end by one (callers fault) and resync_mb_y != 0
767  * causes problems for the first MB line, too.
768  */
769  if (!FIELD_PICTURE(h) && h->current_slice && h->enable_er) {
770 
771  H264SliceContext *sl = h->slice_ctx;
772  int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
773 
775 
776  if (use_last_pic) {
778  sl->ref_list[0][0].parent = &h->last_pic_for_ec;
779  memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
780  memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
782  } else if (sl->ref_count[0]) {
783  ff_h264_set_erpic(&sl->er.last_pic, sl->ref_list[0][0].parent);
784  } else
786 
787  if (sl->ref_count[1])
788  ff_h264_set_erpic(&sl->er.next_pic, sl->ref_list[1][0].parent);
789 
790  sl->er.ref_count = sl->ref_count[0];
791 
792  ff_er_frame_end(&sl->er);
793  if (use_last_pic)
794  memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
795  }
796 #endif /* CONFIG_ERROR_RESILIENCE */
797  /* clean up */
798  if (h->cur_pic_ptr && !h->droppable && h->has_slice) {
801  }
802 
803  return (ret < 0) ? ret : buf_size;
804 }
805 
806 /**
807  * Return the number of bytes consumed for building the current frame.
808  */
809 static int get_consumed_bytes(int pos, int buf_size)
810 {
811  if (pos == 0)
812  pos = 1; // avoid infinite loops (I doubt that is needed but...)
813  if (pos + 10 > buf_size)
814  pos = buf_size; // oops ;)
815 
816  return pos;
817 }
818 
820 {
821  AVVideoEncParams *par;
822  unsigned int nb_mb = p->mb_height * p->mb_width;
823  unsigned int x, y;
824 
826  if (!par)
827  return AVERROR(ENOMEM);
828 
829  par->qp = p->pps->init_qp;
830 
831  par->delta_qp[1][0] = p->pps->chroma_qp_index_offset[0];
832  par->delta_qp[1][1] = p->pps->chroma_qp_index_offset[0];
833  par->delta_qp[2][0] = p->pps->chroma_qp_index_offset[1];
834  par->delta_qp[2][1] = p->pps->chroma_qp_index_offset[1];
835 
836  for (y = 0; y < p->mb_height; y++)
837  for (x = 0; x < p->mb_width; x++) {
838  const unsigned int block_idx = y * p->mb_width + x;
839  const unsigned int mb_xy = y * p->mb_stride + x;
841 
842  b->src_x = x * 16;
843  b->src_y = y * 16;
844  b->w = 16;
845  b->h = 16;
846 
847  b->delta_qp = p->qscale_table[mb_xy] - par->qp;
848  }
849 
850  return 0;
851 }
852 
853 static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
854 {
855  AVFrame *src = srcp->f;
856  int ret;
857 
858  ret = av_frame_ref(dst, src);
859  if (ret < 0)
860  return ret;
861 
862  av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(&h->sei.frame_packing), 0);
863 
864  if (srcp->sei_recovery_frame_cnt == 0)
865  dst->key_frame = 1;
866 
868  ret = h264_export_enc_params(dst, srcp);
869  if (ret < 0)
870  goto fail;
871  }
872 
873  return 0;
874 fail:
875  av_frame_unref(dst);
876  return ret;
877 }
878 
879 static int is_extra(const uint8_t *buf, int buf_size)
880 {
881  int cnt= buf[5]&0x1f;
882  const uint8_t *p= buf+6;
883  if (!cnt)
884  return 0;
885  while(cnt--){
886  int nalsize= AV_RB16(p) + 2;
887  if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
888  return 0;
889  p += nalsize;
890  }
891  cnt = *(p++);
892  if(!cnt)
893  return 0;
894  while(cnt--){
895  int nalsize= AV_RB16(p) + 2;
896  if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8)
897  return 0;
898  p += nalsize;
899  }
900  return 1;
901 }
902 
903 static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
904 {
905  int ret;
906 
909  out->recovered)) {
910 
911  if (!h->avctx->hwaccel &&
912  (out->field_poc[0] == INT_MAX ||
913  out->field_poc[1] == INT_MAX)
914  ) {
915  int p;
916  AVFrame *f = out->f;
917  int field = out->field_poc[0] == INT_MAX;
918  uint8_t *dst_data[4];
919  int linesizes[4];
920  const uint8_t *src_data[4];
921 
922  av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
923 
924  for (p = 0; p<4; p++) {
925  dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
926  src_data[p] = f->data[p] + field *f->linesize[p];
927  linesizes[p] = 2*f->linesize[p];
928  }
929 
930  av_image_copy(dst_data, linesizes, src_data, linesizes,
931  f->format, f->width, f->height>>1);
932  }
933 
934  ret = output_frame(h, dst, out);
935  if (ret < 0)
936  return ret;
937 
938  *got_frame = 1;
939 
940  if (CONFIG_MPEGVIDEO) {
942  out->mb_type,
943  out->qscale_table,
944  out->motion_val,
945  NULL,
946  out->mb_width, out->mb_height, out->mb_stride, 1);
947  }
948  }
949 
950  return 0;
951 }
952 
954  int *got_frame, int buf_index)
955 {
956  int ret, i, out_idx;
957  H264Picture *out = h->delayed_pic[0];
958 
959  h->cur_pic_ptr = NULL;
960  h->first_field = 0;
961 
962  out_idx = 0;
963  for (i = 1;
964  h->delayed_pic[i] &&
965  !h->delayed_pic[i]->f->key_frame &&
966  !h->delayed_pic[i]->mmco_reset;
967  i++)
968  if (h->delayed_pic[i]->poc < out->poc) {
969  out = h->delayed_pic[i];
970  out_idx = i;
971  }
972 
973  for (i = out_idx; h->delayed_pic[i]; i++)
974  h->delayed_pic[i] = h->delayed_pic[i + 1];
975 
976  if (out) {
977  out->reference &= ~DELAYED_PIC_REF;
978  ret = finalize_frame(h, dst_frame, out, got_frame);
979  if (ret < 0)
980  return ret;
981  }
982 
983  return buf_index;
984 }
985 
986 static int h264_decode_frame(AVCodecContext *avctx, void *data,
987  int *got_frame, AVPacket *avpkt)
988 {
989  const uint8_t *buf = avpkt->data;
990  int buf_size = avpkt->size;
991  H264Context *h = avctx->priv_data;
992  AVFrame *pict = data;
993  int buf_index;
994  int ret;
995 
996  h->flags = avctx->flags;
997  h->setup_finished = 0;
998  h->nb_slice_ctx_queued = 0;
999 
1001 
1002  /* end of stream, output what is still in the buffers */
1003  if (buf_size == 0)
1004  return send_next_delayed_frame(h, pict, got_frame, 0);
1005 
1007  int side_size;
1008  uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1009  if (is_extra(side, side_size))
1010  ff_h264_decode_extradata(side, side_size,
1011  &h->ps, &h->is_avc, &h->nal_length_size,
1012  avctx->err_recognition, avctx);
1013  }
1014  if (h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC) {
1015  if (is_extra(buf, buf_size))
1016  return ff_h264_decode_extradata(buf, buf_size,
1017  &h->ps, &h->is_avc, &h->nal_length_size,
1018  avctx->err_recognition, avctx);
1019  }
1020 
1021  buf_index = decode_nal_units(h, buf, buf_size);
1022  if (buf_index < 0)
1023  return AVERROR_INVALIDDATA;
1024 
1025  if (!h->cur_pic_ptr && h->nal_unit_type == H264_NAL_END_SEQUENCE) {
1026  av_assert0(buf_index <= buf_size);
1027  return send_next_delayed_frame(h, pict, got_frame, buf_index);
1028  }
1029 
1030  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && (!h->cur_pic_ptr || !h->has_slice)) {
1031  if (avctx->skip_frame >= AVDISCARD_NONREF ||
1032  buf_size >= 4 && !memcmp("Q264", buf, 4))
1033  return buf_size;
1034  av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1035  return AVERROR_INVALIDDATA;
1036  }
1037 
1038  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
1039  (h->mb_y >= h->mb_height && h->mb_height)) {
1040  if ((ret = ff_h264_field_end(h, &h->slice_ctx[0], 0)) < 0)
1041  return ret;
1042 
1043  /* Wait for second field. */
1044  if (h->next_output_pic) {
1045  ret = finalize_frame(h, pict, h->next_output_pic, got_frame);
1046  if (ret < 0)
1047  return ret;
1048  }
1049  }
1050 
1051  av_assert0(pict->buf[0] || !*got_frame);
1052 
1054 
1055  return get_consumed_bytes(buf_index, buf_size);
1056 }
1057 
1058 #define OFFSET(x) offsetof(H264Context, x)
1059 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1060 static const AVOption h264_options[] = {
1061  { "is_avc", "is avc", OFFSET(is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, 0 },
1062  { "nal_length_size", "nal_length_size", OFFSET(nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, 0 },
1063  { "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
1064  { "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 },
1065  { NULL },
1066 };
1067 
1068 static const AVClass h264_class = {
1069  .class_name = "H264 Decoder",
1070  .item_name = av_default_item_name,
1071  .option = h264_options,
1072  .version = LIBAVUTIL_VERSION_INT,
1073 };
1074 
1076  .name = "h264",
1077  .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1078  .type = AVMEDIA_TYPE_VIDEO,
1079  .id = AV_CODEC_ID_H264,
1080  .priv_data_size = sizeof(H264Context),
1082  .close = h264_decode_end,
1084  .capabilities = /*AV_CODEC_CAP_DRAW_HORIZ_BAND |*/ AV_CODEC_CAP_DR1 |
1087  .hw_configs = (const AVCodecHWConfigInternal*[]) {
1088 #if CONFIG_H264_DXVA2_HWACCEL
1089  HWACCEL_DXVA2(h264),
1090 #endif
1091 #if CONFIG_H264_D3D11VA_HWACCEL
1092  HWACCEL_D3D11VA(h264),
1093 #endif
1094 #if CONFIG_H264_D3D11VA2_HWACCEL
1095  HWACCEL_D3D11VA2(h264),
1096 #endif
1097 #if CONFIG_H264_NVDEC_HWACCEL
1098  HWACCEL_NVDEC(h264),
1099 #endif
1100 #if CONFIG_H264_VAAPI_HWACCEL
1101  HWACCEL_VAAPI(h264),
1102 #endif
1103 #if CONFIG_H264_VDPAU_HWACCEL
1104  HWACCEL_VDPAU(h264),
1105 #endif
1106 #if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
1107  HWACCEL_VIDEOTOOLBOX(h264),
1108 #endif
1109  NULL
1110  },
1113  .flush = h264_decode_flush,
1114  .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
1116  .priv_class = &h264_class,
1117 };
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:749
struct H264Context * h264
Definition: h264dec.h:184
static int h264_export_enc_params(AVFrame *f, H264Picture *p)
Definition: h264dec.c:819
#define NULL
Definition: coverity.c:32
#define AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS
Decoding only.
Definition: avcodec.h:412
int workaround_bugs
Definition: h264dec.h:373
#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:301
#define SLICE_FLAG_ALLOW_FIELD
allow draw_horiz_band() with field slices (MPEG-2 field pics)
Definition: avcodec.h:1006
int ff_h264_queue_decode_slice(H264Context *h, const H2645NAL *nal)
Submit a slice for decoding.
Definition: h264_slice.c:2083
H264POCContext poc
Definition: h264dec.h:466
static int send_next_delayed_frame(H264Context *h, AVFrame *dst_frame, int *got_frame, int buf_index)
Definition: h264dec.c:953
int mb_num
Definition: h264dec.h:443
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2549
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
#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:139
static av_always_inline AVVideoBlockParams * av_video_enc_params_block(AVVideoEncParams *par, unsigned int idx)
int16_t mv_cache[2][5 *8][2]
Motion vector cache.
Definition: h264dec.h:305
AVOption.
Definition: opt.h:246
int size
Definition: h2645_parse.h:35
int edge_emu_buffer_allocated
Definition: h264dec.h:293
uint16_t num_pictures
Definition: h264_sei.h:168
static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
Definition: h264dec.c:552
int32_t qp
Base quantisation parameter for the frame.
int first_field
Definition: h264dec.h:414
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
int chroma_qp_index_offset[2]
Definition: h264_ps.h:122
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:491
const char * desc
Definition: nvenc.c:79
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint16_t * cbp_table
Definition: h264dec.h:419
#define avpriv_request_sample(...)
void ff_er_frame_end(ERContext *s)
int32_t delta_qp
Difference between this block&#39;s final quantization parameter and the corresponding per-frame value...
int mb_y
Definition: h264dec.h:440
int bitstream_restriction_flag
Definition: h264_ps.h:87
int num
Numerator.
Definition: rational.h:59
int bipred_scratchpad_allocated
Definition: h264dec.h:292
#define HWACCEL_NVDEC(codec)
Definition: hwconfig.h:71
int size
Definition: packet.h:356
const char * b
Definition: vf_curves.c:116
#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:235
AVBufferPool * mb_type_pool
Definition: h264dec.h:556
static void idr(H264Context *h)
instantaneous decoder refresh.
Definition: h264dec.c:451
int16_t(*[2] motion_val)[2]
Definition: h264dec.h:136
int flags
Definition: h264dec.h:372
void ff_h264_flush_change(H264Context *h)
Definition: h264dec.c:464
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:736
int mb_height
Definition: h264dec.h:441
H264Picture * delayed_pic[MAX_DELAYED_PIC_COUNT+2]
Definition: h264dec.h:471
int is_avc
Used to parse AVC variant of H.264.
Definition: h264dec.h:456
AVBufferPool * ref_index_pool
Definition: h264dec.h:558
int height_from_caller
Definition: h264dec.h:549
int src_x
Distance in luma pixels from the top-left corner of the visible frame to the top-left corner of the b...
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:343
AVFrame * f
Definition: h264dec.h:129
const PPS * pps
Definition: h264dec.h:166
#define AV_CODEC_FLAG2_CHUNKS
Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries...
Definition: avcodec.h:367
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:1690
AVCodec.
Definition: codec.h:190
int picture_structure
Definition: h264dec.h:413
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
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, &#39;draw_horiz_band&#39; is called by the libavcodec decoder to draw a horizontal band...
Definition: avcodec.h:761
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264dec.h:273
int size_bits
Size, in bits, of just the data, excluding the stop bit and any trailing padding. ...
Definition: h2645_parse.h:42
H264SEIGreenMetaData green_metadata
Definition: h264_sei.h:191
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:649
int ff_h264_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: h264_slice.c:296
uint8_t * chroma_pred_mode_table
Definition: h264dec.h:422
int32_t delta_qp[4][2]
Quantisation parameter offset from the base (per-frame) qp for a given plane (first index) and AC/DC ...
int setup_finished
Definition: h264dec.h:540
void ff_h264_remove_all_refs(H264Context *h)
Definition: h264_refs.c:565
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:2004
int ff_h264_execute_decode_slices(H264Context *h)
Call decode_slice() for each context.
Definition: h264_slice.c:2792
H264SEIContext sei
Definition: h264dec.h:553
int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
Definition: h264dec.c:61
const char * ff_h264_sei_stereo_mode(const H264SEIFramePacking *h)
Get stereo_mode string from the h264 frame_packing_arrangement.
Definition: h264_sei.c:498
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: codec.h:75
#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:809
ptrdiff_t b8_stride
#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
int export_side_data
Bit set of AV_CODEC_EXPORT_DATA_* flags, which affects the kind of metadata exported in frame...
Definition: avcodec.h:2354
uint8_t
#define av_cold
Definition: attributes.h:88
uint8_t green_metadata_type
Definition: h264_sei.h:165
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
#define HWACCEL_VDPAU(codec)
Definition: hwconfig.h:75
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:2486
AVOptions.
void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
Definition: h264_picture.c:136
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
#define AV_RB32
Definition: intreadwrite.h:130
Data structure for storing block-level encoding information.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
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:444
#define emms_c()
Definition: internal.h:55
static int get_last_needed_nal(H264Context *h)
Definition: h264dec.c:510
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:627
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, int use_ref)
Split an input packet into NAL units.
Definition: h2645_parse.c:392
void ff_h2645_packet_uninit(H2645Packet *pkt)
Free all the allocated memory in the packet.
Definition: h2645_parse.c:519
ERPicture cur_pic
int frame_recovered
Initial frame has been completely recovered.
Definition: h264dec.h:530
const char data[16]
Definition: mxf.c:91
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:462
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
#define height
uint8_t * data
Definition: packet.h:355
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
Definition: h264dec.c:580
AVDictionary * metadata
metadata.
Definition: frame.h:586
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:451
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:180
int recovered
picture at IDR or recovery point + recovery count
Definition: h264dec.h:161
#define AVOnce
Definition: thread.h:172
#define av_log(a,...)
#define FF_CODEC_CAP_ALLOCATE_PROGRESS
Definition: internal.h:75
int last_pocs[MAX_DELAYED_PIC_COUNT]
Definition: h264dec.h:472
uint16_t num_seconds
Definition: h264_sei.h:167
#define HWACCEL_D3D11VA(codec)
Definition: hwconfig.h:79
uint8_t percent_six_tap_filtering
Definition: h264_sei.h:171
H.264 common definitions.
void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl, int y, int height)
Definition: h264dec.c:103
#define src
Definition: vp8dsp.c:254
H.264 parameter set handling.
H264Picture DPB[H264_MAX_PICTURE_COUNT]
Definition: h264dec.h:351
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
int width
Definition: frame.h:358
#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:816
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:1068
int16_t * dc_val_base
Definition: h264dec.h:287
int context_initialized
Definition: h264dec.h:371
ERContext er
Definition: h264dec.h:186
int nal_unit_type
Definition: h264dec.h:449
int num_reorder_frames
Definition: h264_ps.h:88
#define AV_RB16
Definition: intreadwrite.h:53
int is_copy
Whether the parent AVCodecContext is a copy of the context which had init() called on it...
Definition: internal.h:123
#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:353
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
static const AVOption h264_options[]
Definition: h264dec.c:1060
Display matrix.
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:1804
H2645Packet pkt
Definition: h264dec.h:360
unsigned int pos
Definition: spdifenc.c:412
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
#define FIELD_PICTURE(h)
Definition: h264dec.h:74
uint8_t(*[2] mvd_table)[2]
Definition: h264dec.h:423
static av_cold int h264_decode_end(AVCodecContext *avctx)
Definition: h264dec.c:355
int prev_interlaced_frame
Complement sei_pic_struct SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced...
Definition: h264dec.h:504
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:606
static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
Definition: h264dec.c:903
ThreadFrame tf
Definition: h264dec.h:130
simple assert() macros that are a bit more flexible than ISO C assert().
uint8_t(*[2] top_borders)[(16 *3) *2]
Definition: h264dec.h:291
const char * name
Name of the codec implementation.
Definition: codec.h:197
H264SEIUnregistered unregistered
Definition: h264_sei.h:186
static const uint8_t offset[127][2]
Definition: vf_spp.c:93
uint8_t * list_counts
Array of list_count per MB specifying the slice type.
Definition: h264dec.h:416
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:123
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:106
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:44
uint8_t percent_non_zero_macroblocks
Definition: h264_sei.h:169
#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:227
uint8_t * error_status_table
uint8_t * direct_table
Definition: h264dec.h:424
int nal_length_size
Number of bytes used for nal length (1, 2 or 4)
Definition: h264dec.h:457
useful rectangle filling function
uint8_t * data[3]
Definition: h264dec.h:173
int prev_poc_msb
poc_msb of the last reference pic for POC type 0
Definition: h264_parse.h:49
#define CONFIG_MPEGVIDEO
Definition: config.h:665
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:1655
#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:1796
uint32_t * mb2br_xy
Definition: h264dec.h:406
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:409
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:67
Video encoding parameters for a given frame.
int reference
Definition: h264dec.h:160
int w
Width and height of the block in luma pixels.
static int is_extra(const uint8_t *buf, int buf_size)
Definition: h264dec.c:879
int width
picture width / height.
Definition: avcodec.h:699
int nb_slice_ctx
Definition: h264dec.h:357
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:1797
Context Adaptive Binary Arithmetic Coder inline functions.
int init_qp
pic_init_qp_minus26 + 26
Definition: h264_ps.h:120
H.264 / AVC / MPEG-4 part10 codec.
int mmco_reset
Definition: h264dec.h:481
H264SliceContext * slice_ctx
Definition: h264dec.h:356
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1666
int reference
Definition: h264dec.h:176
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:658
int top_borders_allocated[2]
Definition: h264dec.h:294
static void fill_rectangle(int x, int y, int w, int h)
Definition: ffplay.c:831
int ref_idc
H.264 only, nal_ref_idc.
Definition: h2645_parse.h:70
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:52
#define HWACCEL_DXVA2(codec)
Definition: hwconfig.h:67
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:1785
uint8_t * edge_emu_buffer
Definition: h264dec.h:290
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:105
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:110
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:373
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: packet.h:55
int mb_stride
Definition: h264dec.h:442
AVCodecContext * avctx
Definition: h264dec.h:345
#define AV_ONCE_INIT
Definition: thread.h:173
Libavcodec external API header.
#define MAX_DELAYED_PIC_COUNT
Definition: h264dec.h:56
enum AVCodecID codec_id
Definition: avcodec.h:536
AVCodec ff_h264_decoder
Definition: h264dec.c:1075
ERPicture next_pic
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:331
int next_outputed_poc
Definition: h264dec.h:474
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:677
int field_poc[2]
top/bottom POC
Definition: h264dec.h:147
AVVideoEncParams * av_video_enc_params_create_side_data(AVFrame *frame, enum AVVideoEncParamsType type, unsigned int nb_blocks)
Allocates memory for AVEncodeInfoFrame plus an array of.
int debug
debug
Definition: avcodec.h:1611
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:517
main external API structure.
Definition: avcodec.h:526
const uint8_t * data
Definition: h2645_parse.h:36
int mb_height
Definition: h264dec.h:168
static AVOnce h264_vlc_init
Definition: h264dec.c:387
int8_t * qscale_table
Definition: h264dec.h:133
static const uint8_t scan8[16 *3+3]
Definition: h264dec.h:650
int extradata_size
Definition: avcodec.h:628
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:1004
static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
Definition: h264dec.c:853
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:300
void av_buffer_pool_uninit(AVBufferPool **ppool)
Mark the pool as being available for freeing.
Definition: buffer.c:276
static av_always_inline uint32_t pack16to32(unsigned a, unsigned b)
Definition: h264dec.h:666
int8_t * ref_index[2]
Definition: h264dec.h:145
av_cold void ff_h264_decode_init_vlc(void)
Definition: h264_cavlc.c:327
#define HWACCEL_D3D11VA2(codec)
Definition: hwconfig.h:69
int mmco_reset
MMCO_RESET set this 1.
Definition: h264dec.h:150
H264Picture * cur_pic_ptr
Definition: h264dec.h:352
#define FMO
Definition: h264dec.h:62
int mb_mbaff
mb_aff_frame && mb_field_decoding_flag
Definition: h264dec.h:248
#define FF_DEBUG_GREEN_MD
Definition: avcodec.h:1635
int enable_er
Definition: h264dec.h:551
uint8_t percent_intra_coded_macroblocks
Definition: h264_sei.h:170
const SPS * sps
Definition: h264_ps.h:150
#define FF_DECODE_ERROR_DECODE_SLICES
Definition: frame.h:599
int width_from_caller
Definition: h264dec.h:548
int decode_error_flags
decode error flags of the frame, set to a combination of FF_DECODE_ERROR_xxx flags if the decoder pro...
Definition: frame.h:595
H264SEIRecoveryPoint recovery_point
Definition: h264_sei.h:187
AVCodecContext * avctx
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:554
int linesize[3]
Definition: h264dec.h:174
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:2500
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:314
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:173
int ff_h264_alloc_tables(H264Context *h)
Allocate tables.
Definition: h264dec.c:181
#define OFFSET(x)
Definition: ffmpeg_opt.c:3387
int has_recovery_point
Definition: h264dec.h:532
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:2472
#define CONFIG_ERROR_RESILIENCE
Definition: config.h:575
int mb_stride
Definition: h264dec.h:169
uint16_t xsd_metric_value
Definition: h264_sei.h:174
int nb_slice_ctx_queued
Definition: h264dec.h:358
discard all non reference
Definition: avcodec.h:232
int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
Definition: h264_picture.c:159
AVBufferPool * qscale_table_pool
Definition: h264dec.h:555
H264Picture * next_output_pic
Definition: h264dec.h:473
AVBufferPool * motion_val_pool
Definition: h264dec.h:557
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:464
H264ParamSets ps
Definition: h264dec.h:462
int16_t * dc_val[3]
H264SEIFramePacking frame_packing
Definition: h264_sei.h:189
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:1560
const AVProfile ff_h264_profiles[]
Definition: profiles.c:58
int cur_chroma_format_idc
Definition: h264dec.h:542
int8_t * intra4x4_pred_mode
Definition: h264dec.h:212
int den
Denominator.
Definition: rational.h:60
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:317
#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:986
GetBitContext gb
Definition: h2645_parse.h:47
void ff_h264_free_tables(H264Context *h)
Definition: h264dec.c:138
void * priv_data
Definition: avcodec.h:553
const uint8_t * raw_data
Definition: h2645_parse.h:45
#define PICT_FRAME
Definition: mpegutils.h:39
int8_t ref_cache[2][5 *8]
Definition: h264dec.h:306
#define AV_CODEC_FLAG_OUTPUT_CORRUPT
Output even those frames that might be corrupted.
Definition: avcodec.h:283
#define HWACCEL_VAAPI(codec)
Definition: hwconfig.h:73
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:561
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:175
H2645NAL * nals
Definition: h2645_parse.h:82
H264Picture cur_pic
Definition: h264dec.h:353
#define PART_NOT_AVAILABLE
Definition: h264dec.h:397
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:378
int mb_width
Definition: h264dec.h:441
int current_slice
current slice number, used to initialize slice_num of each thread/context
Definition: h264dec.h:494
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:613
uint32_t * mb2b_xy
Definition: h264dec.h:405
H264Ref ref_list[2][48]
0..15: frame refs, 16..47: mbaff field refs.
Definition: h264dec.h:275
static av_cold int h264_decode_init(AVCodecContext *avctx)
Definition: h264dec.c:389
H264Picture last_pic_for_ec
Definition: h264dec.h:354
int height
Definition: frame.h:358
#define AV_CODEC_FLAG2_SHOW_ALL
Show all frames before the first keyframe.
Definition: avcodec.h:376
FILE * out
Definition: movenc.c:54
uint8_t(*[2] mvd_table)[2]
Definition: h264dec.h:319
int mb_width
Definition: h264dec.h:168
#define av_freep(p)
static void h264_decode_flush(AVCodecContext *avctx)
Definition: h264dec.c:489
int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, const H264ParamSets *ps, void *logctx)
Definition: h264_sei.c:418
int prev_frame_num_offset
for POC type 2
Definition: h264_parse.h:52
int8_t * intra4x4_pred_mode
Definition: h264dec.h:391
#define VD
Definition: cuviddec.c:1080
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
ptrdiff_t mb_stride
int mb_field_decoding_flag
Definition: h264dec.h:247
uint8_t(* non_zero_count)[48]
Definition: h264dec.h:394
exp golomb vlc stuff
uint8_t * bipred_scratchpad
Definition: h264dec.h:289
void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
Definition: h264_picture.c:44
This structure stores compressed data.
Definition: packet.h:332
int droppable
Definition: h264dec.h:368
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
int arrangement_cancel_flag
is previous arrangement canceled, -1 if never received
Definition: h264_sei.h:150
int nal_ref_idc
Definition: h264dec.h:448
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:407
const uint16_t ff_h264_mb_sizes[4]
Definition: h264dec.c:59
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)
#define H264_MAX_PICTURE_COUNT
Definition: h264dec.h:52
void * av_mallocz_array(size_t nmemb, size_t size)
Allocate a memory block for an array with av_mallocz().
Definition: mem.c:190
uint8_t percent_alpha_point_deblocking_instance
Definition: h264_sei.h:172