FFmpeg
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 "config_components.h"
31 
32 #include "libavutil/avassert.h"
33 #include "libavutil/emms.h"
34 #include "libavutil/imgutils.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/thread.h"
38 
39 #include "codec_internal.h"
40 #include "internal.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 "h264_ps.h"
48 #include "golomb.h"
49 #include "hwaccel_internal.h"
50 #include "hwconfig.h"
51 #include "mpegutils.h"
52 #include "profiles.h"
53 #include "rectangle.h"
54 #include "refstruct.h"
55 #include "thread.h"
56 #include "threadframe.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  const 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;
99  ff_h264_hl_decode_mb(h, &h->slice_ctx[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 
141  av_freep(&h->intra4x4_pred_mode);
142  av_freep(&h->chroma_pred_mode_table);
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);
147  av_freep(&h->non_zero_count);
148  av_freep(&h->slice_table_base);
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 
155  ff_refstruct_pool_uninit(&h->qscale_table_pool);
156  ff_refstruct_pool_uninit(&h->mb_type_pool);
157  ff_refstruct_pool_uninit(&h->motion_val_pool);
158  ff_refstruct_pool_uninit(&h->ref_index_pool);
159 
160 #if CONFIG_ERROR_RESILIENCE
161  av_freep(&h->er.mb_index2xy);
162  av_freep(&h->er.error_status_table);
163  av_freep(&h->er.er_temp_buffer);
164  av_freep(&h->dc_val_base);
165 #endif
166 
167  for (i = 0; i < h->nb_slice_ctx; i++) {
168  H264SliceContext *sl = &h->slice_ctx[i];
169 
172  av_freep(&sl->top_borders[0]);
173  av_freep(&sl->top_borders[1]);
174 
177  sl->top_borders_allocated[0] = 0;
178  sl->top_borders_allocated[1] = 0;
179  }
180 }
181 
183 {
184  ERContext *const er = &h->er;
185  const int big_mb_num = h->mb_stride * (h->mb_height + 1);
186  const int row_mb_num = 2*h->mb_stride*FFMAX(h->nb_slice_ctx, 1);
187  const int st_size = big_mb_num + h->mb_stride;
188  int x, y;
189 
190  if (!FF_ALLOCZ_TYPED_ARRAY(h->intra4x4_pred_mode, row_mb_num * 8) ||
191  !FF_ALLOCZ_TYPED_ARRAY(h->non_zero_count, big_mb_num) ||
192  !FF_ALLOCZ_TYPED_ARRAY(h->slice_table_base, st_size) ||
193  !FF_ALLOCZ_TYPED_ARRAY(h->cbp_table, big_mb_num) ||
194  !FF_ALLOCZ_TYPED_ARRAY(h->chroma_pred_mode_table, big_mb_num) ||
195  !FF_ALLOCZ_TYPED_ARRAY(h->mvd_table[0], row_mb_num * 8) ||
196  !FF_ALLOCZ_TYPED_ARRAY(h->mvd_table[1], row_mb_num * 8) ||
197  !FF_ALLOCZ_TYPED_ARRAY(h->direct_table, big_mb_num * 4) ||
198  !FF_ALLOCZ_TYPED_ARRAY(h->list_counts, big_mb_num) ||
199  !FF_ALLOCZ_TYPED_ARRAY(h->mb2b_xy, big_mb_num) ||
200  !FF_ALLOCZ_TYPED_ARRAY(h->mb2br_xy, big_mb_num))
201  return AVERROR(ENOMEM);
202  h->slice_ctx[0].intra4x4_pred_mode = h->intra4x4_pred_mode;
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  memset(h->slice_table_base, -1,
206  st_size * sizeof(*h->slice_table_base));
207  h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
208  for (y = 0; y < h->mb_height; y++)
209  for (x = 0; x < h->mb_width; x++) {
210  const int mb_xy = x + y * h->mb_stride;
211  const int b_xy = 4 * x + 4 * y * h->b_stride;
212 
213  h->mb2b_xy[mb_xy] = b_xy;
214  h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
215  }
216 
217  if (CONFIG_ERROR_RESILIENCE) {
218  const int er_size = h->mb_height * h->mb_stride * (4*sizeof(int) + 1);
219  int mb_array_size = h->mb_height * h->mb_stride;
220  int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
221  int yc_size = y_size + 2 * big_mb_num;
222 
223  /* init ER */
224  er->avctx = h->avctx;
226  er->opaque = h;
227  er->quarter_sample = 1;
228 
229  er->mb_num = h->mb_num;
230  er->mb_width = h->mb_width;
231  er->mb_height = h->mb_height;
232  er->mb_stride = h->mb_stride;
233  er->b8_stride = h->mb_width * 2 + 1;
234 
235  // error resilience code looks cleaner with this
236  if (!FF_ALLOCZ_TYPED_ARRAY(er->mb_index2xy, h->mb_num + 1) ||
237  !FF_ALLOCZ_TYPED_ARRAY(er->error_status_table, mb_array_size) ||
238  !FF_ALLOCZ_TYPED_ARRAY(er->er_temp_buffer, er_size) ||
239  !FF_ALLOCZ_TYPED_ARRAY(h->dc_val_base, yc_size))
240  return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
241 
242  for (y = 0; y < h->mb_height; y++)
243  for (x = 0; x < h->mb_width; x++)
244  er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
245 
246  er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
247  h->mb_stride + h->mb_width;
248  er->dc_val[0] = h->dc_val_base + h->mb_width * 2 + 2;
249  er->dc_val[1] = h->dc_val_base + y_size + h->mb_stride + 1;
250  er->dc_val[2] = er->dc_val[1] + big_mb_num;
251  for (int i = 0; i < yc_size; i++)
252  h->dc_val_base[i] = 1024;
253  }
254 
255  return 0;
256 }
257 
258 /**
259  * Init slice context
260  */
262 {
263  sl->ref_cache[0][scan8[5] + 1] =
264  sl->ref_cache[0][scan8[7] + 1] =
265  sl->ref_cache[0][scan8[13] + 1] =
266  sl->ref_cache[1][scan8[5] + 1] =
267  sl->ref_cache[1][scan8[7] + 1] =
268  sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
269 
270  sl->er = &h->er;
271 }
272 
273 static int h264_init_pic(H264Picture *pic)
274 {
275  pic->f = av_frame_alloc();
276  if (!pic->f)
277  return AVERROR(ENOMEM);
278 
279  pic->f_grain = av_frame_alloc();
280  if (!pic->f_grain)
281  return AVERROR(ENOMEM);
282 
283  return 0;
284 }
285 
287 {
288  int i, ret;
289 
290  h->avctx = avctx;
291  h->cur_chroma_format_idc = -1;
292 
293  h->width_from_caller = avctx->width;
294  h->height_from_caller = avctx->height;
295 
296  h->workaround_bugs = avctx->workaround_bugs;
297  h->flags = avctx->flags;
298  h->poc.prev_poc_msb = 1 << 16;
299  h->recovery_frame = -1;
300  h->frame_recovered = 0;
301  h->poc.prev_frame_num = -1;
302  h->sei.common.frame_packing.arrangement_cancel_flag = -1;
303  h->sei.common.unregistered.x264_build = -1;
304 
305  h->next_outputed_poc = INT_MIN;
306  for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++)
307  h->last_pocs[i] = INT_MIN;
308 
309  ff_h264_sei_uninit(&h->sei);
310 
311  if (avctx->active_thread_type & FF_THREAD_FRAME) {
312  h->decode_error_flags_pool = ff_refstruct_pool_alloc(sizeof(atomic_int), 0);
313  if (!h->decode_error_flags_pool)
314  return AVERROR(ENOMEM);
315  }
316 
317  h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? avctx->thread_count : 1;
318  h->slice_ctx = av_calloc(h->nb_slice_ctx, sizeof(*h->slice_ctx));
319  if (!h->slice_ctx) {
320  h->nb_slice_ctx = 0;
321  return AVERROR(ENOMEM);
322  }
323 
324  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
325  if ((ret = h264_init_pic(&h->DPB[i])) < 0)
326  return ret;
327  }
328 
329  if ((ret = h264_init_pic(&h->cur_pic)) < 0)
330  return ret;
331 
332  if ((ret = h264_init_pic(&h->last_pic_for_ec)) < 0)
333  return ret;
334 
335  for (i = 0; i < h->nb_slice_ctx; i++)
336  h->slice_ctx[i].h264 = h;
337 
338  return 0;
339 }
340 
342 {
344  av_frame_free(&pic->f);
345  av_frame_free(&pic->f_grain);
346 }
347 
349 {
350  H264Context *h = avctx->priv_data;
351  int i;
352 
355 
356  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
357  h264_free_pic(h, &h->DPB[i]);
358  }
359  memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
360 
361  h->cur_pic_ptr = NULL;
362 
363  ff_refstruct_pool_uninit(&h->decode_error_flags_pool);
364 
365  av_freep(&h->slice_ctx);
366  h->nb_slice_ctx = 0;
367 
368  ff_h264_sei_uninit(&h->sei);
369  ff_h264_ps_uninit(&h->ps);
370 
371  ff_h2645_packet_uninit(&h->pkt);
372 
373  h264_free_pic(h, &h->cur_pic);
374  h264_free_pic(h, &h->last_pic_for_ec);
375 
376  return 0;
377 }
378 
380 
382 {
383  H264Context *h = avctx->priv_data;
384  int ret;
385 
386  ret = h264_init_context(avctx, h);
387  if (ret < 0)
388  return ret;
389 
391  if (ret != 0) {
392  av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
393  return AVERROR_UNKNOWN;
394  }
395 
396 #if FF_API_TICKS_PER_FRAME
398  avctx->ticks_per_frame = 2;
400 #endif
401 
402  if (!avctx->internal->is_copy) {
403  if (avctx->extradata_size > 0 && avctx->extradata) {
405  &h->ps, &h->is_avc, &h->nal_length_size,
406  avctx->err_recognition, avctx);
407  if (ret < 0) {
408  int explode = avctx->err_recognition & AV_EF_EXPLODE;
409  av_log(avctx, explode ? AV_LOG_ERROR: AV_LOG_WARNING,
410  "Error decoding the extradata\n");
411  if (explode) {
412  return ret;
413  }
414  ret = 0;
415  }
416  }
417  }
418 
419  if (h->ps.sps && h->ps.sps->bitstream_restriction_flag &&
420  h->avctx->has_b_frames < h->ps.sps->num_reorder_frames) {
421  h->avctx->has_b_frames = h->ps.sps->num_reorder_frames;
422  }
423 
425 
426  if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
427  h->enable_er = 0;
428 
429  if (h->enable_er && (avctx->active_thread_type & FF_THREAD_SLICE)) {
430  av_log(avctx, AV_LOG_WARNING,
431  "Error resilience with slice threads is enabled. It is unsafe and unsupported and may crash. "
432  "Use it at your own risk\n");
433  }
434 
435  return 0;
436 }
437 
438 /**
439  * instantaneous decoder refresh.
440  */
441 static void idr(H264Context *h)
442 {
443  int i;
445  h->poc.prev_frame_num =
446  h->poc.prev_frame_num_offset = 0;
447  h->poc.prev_poc_msb = 1<<16;
448  h->poc.prev_poc_lsb = -1;
449  for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++)
450  h->last_pocs[i] = INT_MIN;
451 }
452 
453 /* forget old pics after a seek */
455 {
456  int i, j;
457 
458  h->next_outputed_poc = INT_MIN;
459  h->prev_interlaced_frame = 1;
460  idr(h);
461 
462  h->poc.prev_frame_num = -1;
463  if (h->cur_pic_ptr) {
464  h->cur_pic_ptr->reference = 0;
465  for (j=i=0; h->delayed_pic[i]; i++)
466  if (h->delayed_pic[i] != h->cur_pic_ptr)
467  h->delayed_pic[j++] = h->delayed_pic[i];
468  h->delayed_pic[j] = NULL;
469  }
470  ff_h264_unref_picture(&h->last_pic_for_ec);
471 
472  h->first_field = 0;
473  h->recovery_frame = -1;
474  h->frame_recovered = 0;
475  h->current_slice = 0;
476  h->mmco_reset = 1;
477 }
478 
480 {
481  H264Context *h = avctx->priv_data;
482  int i;
483 
484  memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
485 
487  ff_h264_sei_uninit(&h->sei);
488 
489  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
490  ff_h264_unref_picture(&h->DPB[i]);
491  h->cur_pic_ptr = NULL;
492  ff_h264_unref_picture(&h->cur_pic);
493 
494  h->mb_y = 0;
495  h->non_gray = 0;
496 
498  h->context_initialized = 0;
499 
500  if (FF_HW_HAS_CB(avctx, flush))
501  FF_HW_SIMPLE_CALL(avctx, flush);
502 }
503 
505 {
506  int nals_needed = 0;
507  int slice_type = 0;
508  int picture_intra_only = 1;
509  int first_slice = 0;
510  int i, ret;
511 
512  for (i = 0; i < h->pkt.nb_nals; i++) {
513  H2645NAL *nal = &h->pkt.nals[i];
514  GetBitContext gb;
515 
516  /* packets can sometimes contain multiple PPS/SPS,
517  * e.g. two PAFF field pictures in one packet, or a demuxer
518  * which splits NALs strangely if so, when frame threading we
519  * can't start the next thread until we've read all of them */
520  switch (nal->type) {
521  case H264_NAL_SPS:
522  case H264_NAL_PPS:
523  nals_needed = i;
524  break;
525  case H264_NAL_DPA:
526  case H264_NAL_IDR_SLICE:
527  case H264_NAL_SLICE:
528  ret = init_get_bits8(&gb, nal->data + 1, nal->size - 1);
529  if (ret < 0) {
530  av_log(h->avctx, AV_LOG_ERROR, "Invalid zero-sized VCL NAL unit\n");
531  if (h->avctx->err_recognition & AV_EF_EXPLODE)
532  return ret;
533 
534  break;
535  }
536  if (!get_ue_golomb_long(&gb) || // first_mb_in_slice
537  !first_slice ||
538  first_slice != nal->type)
539  nals_needed = i;
540  slice_type = get_ue_golomb_31(&gb);
541  if (slice_type > 9)
542  slice_type = 0;
543  if (slice_type > 4)
544  slice_type -= 5;
545 
546  slice_type = ff_h264_golomb_to_pict_type[slice_type];
547  picture_intra_only &= (slice_type & 3) == AV_PICTURE_TYPE_I;
548  if (!first_slice)
549  first_slice = nal->type;
550  }
551  }
552 
553  h->picture_intra_only = picture_intra_only;
554 
555  return nals_needed;
556 }
557 
558 static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
559 {
560  av_log(logctx, AV_LOG_DEBUG, "Green Metadata Info SEI message\n");
561  av_log(logctx, AV_LOG_DEBUG, " green_metadata_type: %d\n", gm->green_metadata_type);
562 
563  if (gm->green_metadata_type == 0) {
564  av_log(logctx, AV_LOG_DEBUG, " green_metadata_period_type: %d\n", gm->period_type);
565 
566  if (gm->period_type == 2)
567  av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_seconds: %d\n", gm->num_seconds);
568  else if (gm->period_type == 3)
569  av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_pictures: %d\n", gm->num_pictures);
570 
571  av_log(logctx, AV_LOG_DEBUG, " SEI GREEN Complexity Metrics: %f %f %f %f\n",
572  (float)gm->percent_non_zero_macroblocks/255,
573  (float)gm->percent_intra_coded_macroblocks/255,
574  (float)gm->percent_six_tap_filtering/255,
576 
577  } else if (gm->green_metadata_type == 1) {
578  av_log(logctx, AV_LOG_DEBUG, " xsd_metric_type: %d\n", gm->xsd_metric_type);
579 
580  if (gm->xsd_metric_type == 0)
581  av_log(logctx, AV_LOG_DEBUG, " xsd_metric_value: %f\n",
582  (float)gm->xsd_metric_value/100);
583  }
584 }
585 
586 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
587 {
588  AVCodecContext *const avctx = h->avctx;
589  int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
590  int idr_cleared=0;
591  int i, ret = 0;
592 
593  h->has_slice = 0;
594  h->nal_unit_type= 0;
595 
596  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
597  h->current_slice = 0;
598  if (!h->first_field) {
599  h->cur_pic_ptr = NULL;
600  ff_h264_sei_uninit(&h->sei);
601  }
602  }
603 
604  if (h->nal_length_size == 4) {
605  if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
606  h->is_avc = 0;
607  }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
608  h->is_avc = 1;
609  }
610 
611  ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc, h->nal_length_size,
612  avctx->codec_id, 0, 0);
613  if (ret < 0) {
614  av_log(avctx, AV_LOG_ERROR,
615  "Error splitting the input into NAL units.\n");
616  return ret;
617  }
618 
619  if (avctx->active_thread_type & FF_THREAD_FRAME)
620  nals_needed = get_last_needed_nal(h);
621  if (nals_needed < 0)
622  return nals_needed;
623 
624  for (i = 0; i < h->pkt.nb_nals; i++) {
625  H2645NAL *nal = &h->pkt.nals[i];
626  int max_slice_ctx, err;
627 
628  if (avctx->skip_frame >= AVDISCARD_NONREF &&
629  nal->ref_idc == 0 && nal->type != H264_NAL_SEI)
630  continue;
631 
632  // FIXME these should stop being context-global variables
633  h->nal_ref_idc = nal->ref_idc;
634  h->nal_unit_type = nal->type;
635 
636  err = 0;
637  switch (nal->type) {
638  case H264_NAL_IDR_SLICE:
639  if ((nal->data[1] & 0xFC) == 0x98) {
640  av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
641  h->next_outputed_poc = INT_MIN;
642  ret = -1;
643  goto end;
644  }
645  if(!idr_cleared) {
646  idr(h); // FIXME ensure we don't lose some frames if there is reordering
647  }
648  idr_cleared = 1;
649  h->has_recovery_point = 1;
650  case H264_NAL_SLICE:
651  h->has_slice = 1;
652 
653  if ((err = ff_h264_queue_decode_slice(h, nal))) {
654  H264SliceContext *sl = h->slice_ctx + h->nb_slice_ctx_queued;
655  sl->ref_count[0] = sl->ref_count[1] = 0;
656  break;
657  }
658 
659  if (h->current_slice == 1) {
660  if (avctx->active_thread_type & FF_THREAD_FRAME &&
661  i >= nals_needed && !h->setup_finished && h->cur_pic_ptr) {
662  ff_thread_finish_setup(avctx);
663  h->setup_finished = 1;
664  }
665 
666  if (h->avctx->hwaccel &&
667  (ret = FF_HW_CALL(h->avctx, start_frame, buf, buf_size)) < 0)
668  goto end;
669  }
670 
671  max_slice_ctx = avctx->hwaccel ? 1 : h->nb_slice_ctx;
672  if (h->nb_slice_ctx_queued == max_slice_ctx) {
673  if (h->avctx->hwaccel) {
674  ret = FF_HW_CALL(avctx, decode_slice, nal->raw_data, nal->raw_size);
675  h->nb_slice_ctx_queued = 0;
676  } else
678  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
679  goto end;
680  }
681  break;
682  case H264_NAL_DPA:
683  case H264_NAL_DPB:
684  case H264_NAL_DPC:
685  avpriv_request_sample(avctx, "data partitioning");
686  break;
687  case H264_NAL_SEI:
688  if (h->setup_finished) {
689  avpriv_request_sample(avctx, "Late SEI");
690  break;
691  }
692  ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
693  h->has_recovery_point = h->has_recovery_point || h->sei.recovery_point.recovery_frame_cnt != -1;
694  if (avctx->debug & FF_DEBUG_GREEN_MD)
695  debug_green_metadata(&h->sei.green_metadata, h->avctx);
696  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
697  goto end;
698  break;
699  case H264_NAL_SPS: {
700  GetBitContext tmp_gb = nal->gb;
701  if (FF_HW_HAS_CB(avctx, decode_params)) {
702  ret = FF_HW_CALL(avctx, decode_params,
703  nal->type, nal->raw_data, nal->raw_size);
704  if (ret < 0)
705  goto end;
706  }
707  if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
708  break;
709  av_log(h->avctx, AV_LOG_DEBUG,
710  "SPS decoding failure, trying again with the complete NAL\n");
711  init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
712  if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
713  break;
714  ff_h264_decode_seq_parameter_set(&nal->gb, avctx, &h->ps, 1);
715  break;
716  }
717  case H264_NAL_PPS:
718  if (FF_HW_HAS_CB(avctx, decode_params)) {
719  ret = FF_HW_CALL(avctx, decode_params,
720  nal->type, nal->raw_data, nal->raw_size);
721  if (ret < 0)
722  goto end;
723  }
724  ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
725  nal->size_bits);
726  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
727  goto end;
728  break;
729  case H264_NAL_AUD:
731  case H264_NAL_END_STREAM:
733  case H264_NAL_SPS_EXT:
735  break;
736  default:
737  av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
738  nal->type, nal->size_bits);
739  }
740 
741  if (err < 0) {
742  av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
743  }
744  }
745 
747  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
748  goto end;
749 
750  // set decode_error_flags to allow users to detect concealed decoding errors
751  if ((ret < 0 || h->er.error_occurred) && h->cur_pic_ptr) {
752  if (h->cur_pic_ptr->decode_error_flags) {
753  /* Frame-threading in use */
754  atomic_int *decode_error = h->cur_pic_ptr->decode_error_flags;
755  /* Using atomics here is not supposed to provide syncronisation;
756  * they are merely used to allow to set decode_error from both
757  * decoding threads in case of coded slices. */
759  memory_order_relaxed);
760  } else
761  h->cur_pic_ptr->f->decode_error_flags |= FF_DECODE_ERROR_DECODE_SLICES;
762  }
763 
764  ret = 0;
765 end:
766 
767 #if CONFIG_ERROR_RESILIENCE
768  /*
769  * FIXME: Error handling code does not seem to support interlaced
770  * when slices span multiple rows
771  * The ff_er_add_slice calls don't work right for bottom
772  * fields; they cause massive erroneous error concealing
773  * Error marking covers both fields (top and bottom).
774  * This causes a mismatched s->error_count
775  * and a bad error table. Further, the error count goes to
776  * INT_MAX when called for bottom field, because mb_y is
777  * past end by one (callers fault) and resync_mb_y != 0
778  * causes problems for the first MB line, too.
779  */
780  if (!FIELD_PICTURE(h) && h->current_slice && h->enable_er) {
781 
782  H264SliceContext *sl = h->slice_ctx;
783  int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
784  int decode_error_flags = 0;
785 
786  ff_h264_set_erpic(&h->er.cur_pic, h->cur_pic_ptr);
787 
788  if (use_last_pic) {
789  ff_h264_set_erpic(&h->er.last_pic, &h->last_pic_for_ec);
790  sl->ref_list[0][0].parent = &h->last_pic_for_ec;
791  memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
792  memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
793  sl->ref_list[0][0].reference = h->last_pic_for_ec.reference;
794  } else if (sl->ref_count[0]) {
795  ff_h264_set_erpic(&h->er.last_pic, sl->ref_list[0][0].parent);
796  } else
797  ff_h264_set_erpic(&h->er.last_pic, NULL);
798 
799  if (sl->ref_count[1])
800  ff_h264_set_erpic(&h->er.next_pic, sl->ref_list[1][0].parent);
801 
802  ff_er_frame_end(&h->er, &decode_error_flags);
803  if (decode_error_flags) {
804  if (h->cur_pic_ptr->decode_error_flags) {
805  atomic_int *decode_error = h->cur_pic_ptr->decode_error_flags;
806  atomic_fetch_or_explicit(decode_error, decode_error_flags,
807  memory_order_relaxed);
808  } else
809  h->cur_pic_ptr->f->decode_error_flags |= decode_error_flags;
810  }
811  if (use_last_pic)
812  memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
813  }
814 #endif /* CONFIG_ERROR_RESILIENCE */
815  /* clean up */
816  if (h->cur_pic_ptr && !h->droppable && h->has_slice) {
817  ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
818  h->picture_structure == PICT_BOTTOM_FIELD);
819  }
820 
821  return (ret < 0) ? ret : buf_size;
822 }
823 
824 /**
825  * Return the number of bytes consumed for building the current frame.
826  */
827 static int get_consumed_bytes(int pos, int buf_size)
828 {
829  if (pos == 0)
830  pos = 1; // avoid infinite loops (I doubt that is needed but...)
831  if (pos + 10 > buf_size)
832  pos = buf_size; // oops ;)
833 
834  return pos;
835 }
836 
838 {
839  AVVideoEncParams *par;
840  unsigned int nb_mb = p->mb_height * p->mb_width;
841  unsigned int x, y;
842 
844  if (!par)
845  return AVERROR(ENOMEM);
846 
847  par->qp = p->pps->init_qp;
848 
849  par->delta_qp[1][0] = p->pps->chroma_qp_index_offset[0];
850  par->delta_qp[1][1] = p->pps->chroma_qp_index_offset[0];
851  par->delta_qp[2][0] = p->pps->chroma_qp_index_offset[1];
852  par->delta_qp[2][1] = p->pps->chroma_qp_index_offset[1];
853 
854  for (y = 0; y < p->mb_height; y++)
855  for (x = 0; x < p->mb_width; x++) {
856  const unsigned int block_idx = y * p->mb_width + x;
857  const unsigned int mb_xy = y * p->mb_stride + x;
859 
860  b->src_x = x * 16;
861  b->src_y = y * 16;
862  b->w = 16;
863  b->h = 16;
864 
865  b->delta_qp = p->qscale_table[mb_xy] - par->qp;
866  }
867 
868  return 0;
869 }
870 
871 static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
872 {
873  int ret;
874 
875  ret = av_frame_ref(dst, srcp->needs_fg ? srcp->f_grain : srcp->f);
876  if (ret < 0)
877  return ret;
878 
879  if (srcp->needs_fg && (ret = av_frame_copy_props(dst, srcp->f)) < 0)
880  return ret;
881 
882  if (srcp->decode_error_flags) {
883  atomic_int *decode_error = srcp->decode_error_flags;
884  /* The following is not supposed to provide synchronisation at all:
885  * given that srcp has already finished decoding, decode_error
886  * has already been set to its final value. */
887  dst->decode_error_flags |= atomic_load_explicit(decode_error, memory_order_relaxed);
888  }
889 
890  av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(&h->sei.common.frame_packing), 0);
891 
892  if (srcp->sei_recovery_frame_cnt == 0)
893  dst->flags |= AV_FRAME_FLAG_KEY;
894 
895  if (h->avctx->export_side_data & AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS) {
896  ret = h264_export_enc_params(dst, srcp);
897  if (ret < 0)
898  goto fail;
899  }
900 
901  if (!(h->avctx->export_side_data & AV_CODEC_EXPORT_DATA_FILM_GRAIN))
903 
904  return 0;
905 fail:
906  av_frame_unref(dst);
907  return ret;
908 }
909 
910 static int is_avcc_extradata(const uint8_t *buf, int buf_size)
911 {
912  int cnt= buf[5]&0x1f;
913  const uint8_t *p= buf+6;
914  if (!cnt)
915  return 0;
916  while(cnt--){
917  int nalsize= AV_RB16(p) + 2;
918  if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
919  return 0;
920  p += nalsize;
921  }
922  cnt = *(p++);
923  if(!cnt)
924  return 0;
925  while(cnt--){
926  int nalsize= AV_RB16(p) + 2;
927  if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8)
928  return 0;
929  p += nalsize;
930  }
931  return 1;
932 }
933 
934 static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
935 {
936  int ret;
937 
938  if (((h->avctx->flags & AV_CODEC_FLAG_OUTPUT_CORRUPT) ||
939  (h->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL) ||
940  out->recovered)) {
941 
942  if (h->skip_gray > 0 &&
943  h->non_gray && out->gray &&
944  !(h->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL)
945  )
946  return 0;
947 
948  if (!h->avctx->hwaccel &&
949  (out->field_poc[0] == INT_MAX ||
950  out->field_poc[1] == INT_MAX)
951  ) {
952  int p;
953  AVFrame *f = out->f;
954  int field = out->field_poc[0] == INT_MAX;
955  uint8_t *dst_data[4];
956  int linesizes[4];
957  const uint8_t *src_data[4];
958 
959  av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
960 
961  for (p = 0; p<4; p++) {
962  dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
963  src_data[p] = f->data[p] + field *f->linesize[p];
964  linesizes[p] = 2*f->linesize[p];
965  }
966 
967  av_image_copy(dst_data, linesizes, src_data, linesizes,
968  f->format, f->width, f->height>>1);
969  }
970 
971  ret = output_frame(h, dst, out);
972  if (ret < 0)
973  return ret;
974 
975  *got_frame = 1;
976 
977  if (CONFIG_MPEGVIDEODEC) {
978  ff_print_debug_info2(h->avctx, dst, NULL,
979  out->mb_type,
980  out->qscale_table,
981  out->motion_val,
982  out->mb_width, out->mb_height, out->mb_stride, 1);
983  }
984  }
985 
986  return 0;
987 }
988 
990  int *got_frame, int buf_index)
991 {
992  int ret, i, out_idx;
993  H264Picture *out = h->delayed_pic[0];
994 
995  h->cur_pic_ptr = NULL;
996  h->first_field = 0;
997 
998  out_idx = 0;
999  for (i = 1;
1000  h->delayed_pic[i] &&
1001  !(h->delayed_pic[i]->f->flags & AV_FRAME_FLAG_KEY) &&
1002  !h->delayed_pic[i]->mmco_reset;
1003  i++)
1004  if (h->delayed_pic[i]->poc < out->poc) {
1005  out = h->delayed_pic[i];
1006  out_idx = i;
1007  }
1008 
1009  for (i = out_idx; h->delayed_pic[i]; i++)
1010  h->delayed_pic[i] = h->delayed_pic[i + 1];
1011 
1012  if (out) {
1013  out->reference &= ~DELAYED_PIC_REF;
1014  ret = finalize_frame(h, dst_frame, out, got_frame);
1015  if (ret < 0)
1016  return ret;
1017  }
1018 
1019  return buf_index;
1020 }
1021 
1022 static int h264_decode_frame(AVCodecContext *avctx, AVFrame *pict,
1023  int *got_frame, AVPacket *avpkt)
1024 {
1025  const uint8_t *buf = avpkt->data;
1026  int buf_size = avpkt->size;
1027  H264Context *h = avctx->priv_data;
1028  int buf_index;
1029  int ret;
1030 
1031  h->flags = avctx->flags;
1032  h->setup_finished = 0;
1033  h->nb_slice_ctx_queued = 0;
1034 
1035  ff_h264_unref_picture(&h->last_pic_for_ec);
1036 
1037  /* end of stream, output what is still in the buffers */
1038  if (buf_size == 0)
1039  return send_next_delayed_frame(h, pict, got_frame, 0);
1040 
1042  size_t side_size;
1043  uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1044  ff_h264_decode_extradata(side, side_size,
1045  &h->ps, &h->is_avc, &h->nal_length_size,
1046  avctx->err_recognition, avctx);
1047  }
1048  if (h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC) {
1049  if (is_avcc_extradata(buf, buf_size))
1050  return ff_h264_decode_extradata(buf, buf_size,
1051  &h->ps, &h->is_avc, &h->nal_length_size,
1052  avctx->err_recognition, avctx);
1053  }
1054 
1055  buf_index = decode_nal_units(h, buf, buf_size);
1056  if (buf_index < 0)
1057  return AVERROR_INVALIDDATA;
1058 
1059  if (!h->cur_pic_ptr && h->nal_unit_type == H264_NAL_END_SEQUENCE) {
1060  av_assert0(buf_index <= buf_size);
1061  return send_next_delayed_frame(h, pict, got_frame, buf_index);
1062  }
1063 
1064  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && (!h->cur_pic_ptr || !h->has_slice)) {
1065  if (avctx->skip_frame >= AVDISCARD_NONREF ||
1066  buf_size >= 4 && !memcmp("Q264", buf, 4))
1067  return buf_size;
1068  av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1069  return AVERROR_INVALIDDATA;
1070  }
1071 
1072  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
1073  (h->mb_y >= h->mb_height && h->mb_height)) {
1074  if ((ret = ff_h264_field_end(h, &h->slice_ctx[0], 0)) < 0)
1075  return ret;
1076 
1077  /* Wait for second field. */
1078  if (h->next_output_pic) {
1079  ret = finalize_frame(h, pict, h->next_output_pic, got_frame);
1080  if (ret < 0)
1081  return ret;
1082  }
1083  }
1084 
1085  av_assert0(pict->buf[0] || !*got_frame);
1086 
1087  ff_h264_unref_picture(&h->last_pic_for_ec);
1088 
1089  return get_consumed_bytes(buf_index, buf_size);
1090 }
1091 
1092 #define OFFSET(x) offsetof(H264Context, x)
1093 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1094 #define VDX VD | AV_OPT_FLAG_EXPORT
1095 static const AVOption h264_options[] = {
1096  { "is_avc", "is avc", OFFSET(is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, VDX },
1097  { "nal_length_size", "nal_length_size", OFFSET(nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, VDX },
1098  { "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
1099  { "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 },
1100  { "skip_gray", "Do not return gray gap frames", OFFSET(skip_gray), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, VD },
1101  { "noref_gray", "Avoid using gray gap frames as references", OFFSET(noref_gray), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, VD },
1102  { NULL },
1103 };
1104 
1105 static const AVClass h264_class = {
1106  .class_name = "H264 Decoder",
1107  .item_name = av_default_item_name,
1108  .option = h264_options,
1109  .version = LIBAVUTIL_VERSION_INT,
1110 };
1111 
1113  .p.name = "h264",
1114  CODEC_LONG_NAME("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1115  .p.type = AVMEDIA_TYPE_VIDEO,
1116  .p.id = AV_CODEC_ID_H264,
1117  .priv_data_size = sizeof(H264Context),
1119  .close = h264_decode_end,
1121  .p.capabilities = AV_CODEC_CAP_DR1 |
1124  .hw_configs = (const AVCodecHWConfigInternal *const []) {
1125 #if CONFIG_H264_DXVA2_HWACCEL
1126  HWACCEL_DXVA2(h264),
1127 #endif
1128 #if CONFIG_H264_D3D11VA_HWACCEL
1129  HWACCEL_D3D11VA(h264),
1130 #endif
1131 #if CONFIG_H264_D3D11VA2_HWACCEL
1132  HWACCEL_D3D11VA2(h264),
1133 #endif
1134 #if CONFIG_H264_NVDEC_HWACCEL
1135  HWACCEL_NVDEC(h264),
1136 #endif
1137 #if CONFIG_H264_VAAPI_HWACCEL
1138  HWACCEL_VAAPI(h264),
1139 #endif
1140 #if CONFIG_H264_VDPAU_HWACCEL
1141  HWACCEL_VDPAU(h264),
1142 #endif
1143 #if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
1144  HWACCEL_VIDEOTOOLBOX(h264),
1145 #endif
1146 #if CONFIG_H264_VULKAN_HWACCEL
1147  HWACCEL_VULKAN(h264),
1148 #endif
1149  NULL
1150  },
1151  .caps_internal = FF_CODEC_CAP_EXPORTS_CROPPING |
1153  .flush = h264_decode_flush,
1156  .p.profiles = NULL_IF_CONFIG_SMALL(ff_h264_profiles),
1157  .p.priv_class = &h264_class,
1158 };
FF_ALLOCZ_TYPED_ARRAY
#define FF_ALLOCZ_TYPED_ARRAY(p, nelem)
Definition: internal.h:88
PICT_FRAME
#define PICT_FRAME
Definition: mpegutils.h:38
AVVideoEncParams::qp
int32_t qp
Base quantisation parameter for the frame.
Definition: video_enc_params.h:103
hwconfig.h
AVCodecContext::hwaccel
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:1435
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:73
H264SliceContext::mb_xy
int mb_xy
Definition: h264dec.h:226
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
H264SliceContext::ref_cache
int8_t ref_cache[2][5 *8]
Definition: h264dec.h:294
ff_h264_free_tables
void ff_h264_free_tables(H264Context *h)
Definition: h264dec.c:137
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: defs.h:51
ff_h264_sei_uninit
void ff_h264_sei_uninit(H264SEIContext *h)
Reset SEI values at the beginning of the frame.
Definition: h264_sei.c:48
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: codec_internal.h:42
h2645_parse.h
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
decode_slice
static int decode_slice(AVCodecContext *c, void *arg)
Definition: ffv1dec.c:255
AVCodecContext::workaround_bugs
int workaround_bugs
Work around bugs in encoders which sometimes cannot be detected automatically.
Definition: avcodec.h:1341
opt.h
ff_h264_mb_sizes
const uint16_t ff_h264_mb_sizes[4]
Definition: h264dec.c:58
H264Picture::f
AVFrame * f
Definition: h264dec.h:107
ff_h264_ps_uninit
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:270
idr
static void idr(H264Context *h)
instantaneous decoder refresh.
Definition: h264dec.c:441
ff_refstruct_pool_alloc
FFRefStructPool * ff_refstruct_pool_alloc(size_t size, unsigned flags)
Equivalent to ff_refstruct_pool_alloc(size, flags, NULL, NULL, NULL, NULL, NULL)
Definition: refstruct.c:335
out
FILE * out
Definition: movenc.c:54
H264_NAL_FILLER_DATA
@ H264_NAL_FILLER_DATA
Definition: h264.h:46
thread.h
AV_PKT_DATA_NEW_EXTRADATA
@ AV_PKT_DATA_NEW_EXTRADATA
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: packet.h:56
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2964
h264_decode_init
static av_cold int h264_decode_init(AVCodecContext *avctx)
Definition: h264dec.c:381
SLICE_FLAG_ALLOW_FIELD
#define SLICE_FLAG_ALLOW_FIELD
allow draw_horiz_band() with field slices (MPEG-2 field pics)
Definition: avcodec.h:917
AVCodecContext::err_recognition
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:1412
mv
static const int8_t mv[256][2]
Definition: 4xm.c:80
AV_FRAME_DATA_FILM_GRAIN_PARAMS
@ AV_FRAME_DATA_FILM_GRAIN_PARAMS
Film grain parameters for a frame, described by AVFilmGrainParams.
Definition: frame.h:184
H264Picture::pps
const PPS * pps
Definition: h264dec.h:150
H2645NAL::ref_idc
int ref_idc
H.264 only, nal_ref_idc.
Definition: h2645_parse.h:57
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:100
ff_h264_slice_context_init
void ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
Init slice context.
Definition: h264dec.c:261
ERContext::mb_index2xy
int * mb_index2xy
Definition: error_resilience.h:58
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
HWACCEL_DXVA2
#define HWACCEL_DXVA2(codec)
Definition: hwconfig.h:64
ff_h264_update_thread_context
int ff_h264_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: h264_slice.c:329
H264_NAL_DPB
@ H264_NAL_DPB
Definition: h264.h:37
AVPacket::data
uint8_t * data
Definition: packet.h:491
AVOption
AVOption.
Definition: opt.h:251
HWACCEL_D3D11VA2
#define HWACCEL_D3D11VA2(codec)
Definition: hwconfig.h:66
ff_h2645_packet_uninit
void ff_h2645_packet_uninit(H2645Packet *pkt)
Free all the allocated memory in the packet.
Definition: h2645_parse.c:597
b
#define b
Definition: input.c:41
H264SliceContext::ref_count
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264dec.h:262
atomic_int
intptr_t atomic_int
Definition: stdatomic.h:55
H264SEIGreenMetaData::xsd_metric_value
uint16_t xsd_metric_value
Definition: h264_sei.h:116
H264SEIGreenMetaData::period_type
uint8_t period_type
Definition: h264_sei.h:108
PPS::chroma_qp_index_offset
int chroma_qp_index_offset[2]
Definition: h264_ps.h:122
H264Picture::qscale_table
int8_t * qscale_table
Definition: h264dec.h:113
FFCodec
Definition: codec_internal.h:127
ERContext
Definition: error_resilience.h:52
PICT_BOTTOM_FIELD
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:37
ff_h264_update_thread_context_for_user
int ff_h264_update_thread_context_for_user(AVCodecContext *dst, const AVCodecContext *src)
Definition: h264_slice.c:465
FF_HW_SIMPLE_CALL
#define FF_HW_SIMPLE_CALL(avctx, function)
Definition: hwaccel_internal.h:174
decode_nal_units
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
Definition: h264dec.c:586
AVFrame::flags
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:649
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
AVERROR_UNKNOWN
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:73
mpegutils.h
AVFrame::buf
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:590
H264SliceContext::mb_x
int mb_x
Definition: h264dec.h:225
H2645NAL::size_bits
int size_bits
Size, in bits, of just the data, excluding the stop bit and any trailing padding.
Definition: h2645_parse.h:42
ff_h264_decode_picture_parameter_set
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:696
FF_DECODE_ERROR_DECODE_SLICES
#define FF_DECODE_ERROR_DECODE_SLICES
Definition: frame.h:721
H264SliceContext
Definition: h264dec.h:172
golomb.h
exp golomb vlc stuff
AVCodecInternal::is_copy
int is_copy
When using frame-threaded decoding, this field is set for the first worker thread (e....
Definition: internal.h:57
H264SliceContext::mv_cache
int16_t mv_cache[2][5 *8][2]
Motion vector cache.
Definition: h264dec.h:293
AV_CODEC_FLAG_OUTPUT_CORRUPT
#define AV_CODEC_FLAG_OUTPUT_CORRUPT
Output even those frames that might be corrupted.
Definition: avcodec.h:228
H264_NAL_END_SEQUENCE
@ H264_NAL_END_SEQUENCE
Definition: h264.h:44
debug_green_metadata
static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
Definition: h264dec.c:558
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
H264SEIGreenMetaData::percent_non_zero_macroblocks
uint8_t percent_non_zero_macroblocks
Definition: h264_sei.h:111
AVVideoEncParams::delta_qp
int32_t delta_qp[4][2]
Quantisation parameter offset from the base (per-frame) qp for a given plane (first index) and AC/DC ...
Definition: video_enc_params.h:109
AVCodecContext::skip_frame
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:1766
fail
#define fail()
Definition: checkasm.h:141
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1532
ff_refstruct_pool_uninit
static void ff_refstruct_pool_uninit(FFRefStructPool **poolp)
Mark the pool as being available for freeing.
Definition: refstruct.h:292
ff_h264_sei_decode
int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, const H264ParamSets *ps, void *logctx)
Definition: h264_sei.c:231
GetBitContext
Definition: get_bits.h:108
AV_VIDEO_ENC_PARAMS_H264
@ AV_VIDEO_ENC_PARAMS_H264
H.264 stores:
Definition: video_enc_params.h:57
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:521
HWACCEL_VDPAU
#define HWACCEL_VDPAU(codec)
Definition: hwconfig.h:72
H264Picture::mb_stride
int mb_stride
Definition: h264dec.h:153
scan8
static const uint8_t scan8[16 *3+3]
Definition: h264_parse.h:40
ff_h264_flush_change
void ff_h264_flush_change(H264Context *h)
Definition: h264dec.c:454
finalize_frame
static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
Definition: h264dec.c:934
H264Picture::f_grain
AVFrame * f_grain
Definition: h264dec.h:110
ff_h264_golomb_to_pict_type
const uint8_t ff_h264_golomb_to_pict_type[5]
Definition: h264data.c:37
H264Ref::data
uint8_t * data[3]
Definition: h264dec.h:162
pack16to32
static av_always_inline uint32_t pack16to32(unsigned a, unsigned b)
Definition: h264_parse.h:127
refstruct.h
AVVideoEncParams
Video encoding parameters for a given frame.
Definition: video_enc_params.h:73
ERContext::mb_num
int mb_num
Definition: error_resilience.h:59
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:88
ERContext::avctx
AVCodecContext * avctx
Definition: error_resilience.h:53
ff_h264_hl_decode_mb
void ff_h264_hl_decode_mb(const H264Context *h, H264SliceContext *sl)
Definition: h264_mb.c:800
avassert.h
ff_thread_once
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:203
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
h264_decode_frame
static int h264_decode_frame(AVCodecContext *avctx, AVFrame *pict, int *got_frame, AVPacket *avpkt)
Definition: h264dec.c:1022
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
h264_free_pic
static void h264_free_pic(H264Context *h, H264Picture *pic)
Definition: h264dec.c:341
av_cold
#define av_cold
Definition: attributes.h:90
init_get_bits8
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:545
AV_FRAME_FLAG_KEY
#define AV_FRAME_FLAG_KEY
A flag to mark frames that are keyframes.
Definition: frame.h:628
ff_thread_report_progress
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
Definition: pthread_frame.c:589
H2645NAL::size
int size
Definition: h2645_parse.h:36
H264_NAL_END_STREAM
@ H264_NAL_END_STREAM
Definition: h264.h:45
emms_c
#define emms_c()
Definition: emms.h:63
get_last_needed_nal
static int get_last_needed_nal(H264Context *h)
Definition: h264dec.c:504
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:543
ff_er_frame_end
void ff_er_frame_end(ERContext *s, int *decode_error_flags)
Indicate that a frame has finished decoding and perform error concealment in case it has been enabled...
Definition: error_resilience.c:892
ff_h264_queue_decode_slice
int ff_h264_queue_decode_slice(H264Context *h, const H2645NAL *nal)
Submit a slice for decoding.
Definition: h264_slice.c:2052
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:306
h264_init_pic
static int h264_init_pic(H264Picture *pic)
Definition: h264dec.c:273
h264_decode_end
static av_cold int h264_decode_end(AVCodecContext *avctx)
Definition: h264dec.c:348
H264_NAL_PPS
@ H264_NAL_PPS
Definition: h264.h:42
get_consumed_bytes
static int get_consumed_bytes(int pos, int buf_size)
Return the number of bytes consumed for building the current frame.
Definition: h264dec.c:827
ff_h264_decode_extradata
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:464
FIELD_PICTURE
#define FIELD_PICTURE(h)
Definition: h264dec.h:67
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts_bsf.c:365
avpriv_h264_has_num_reorder_frames
int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
Definition: h264dec.c:60
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
h264data.h
ff_h264_remove_all_refs
void ff_h264_remove_all_refs(H264Context *h)
Definition: h264_refs.c:576
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
ERContext::dc_val
int16_t * dc_val[3]
Definition: error_resilience.h:68
H2645NAL::data
const uint8_t * data
Definition: h2645_parse.h:35
field
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this field
Definition: writing_filters.txt:78
ff_h264_decoder
const FFCodec ff_h264_decoder
Definition: h264dec.c:1112
H264Picture::sei_recovery_frame_cnt
int sei_recovery_frame_cnt
Definition: h264dec.h:147
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: codec_id.h:79
H2645NAL::type
int type
NAL unit type.
Definition: h2645_parse.h:52
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:272
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:451
ff_h264_draw_horiz_band
void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl, int y, int height)
Definition: h264dec.c:102
if
if(ret)
Definition: filter_design.txt:179
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:110
threadframe.h
H264SEIGreenMetaData::percent_alpha_point_deblocking_instance
uint8_t percent_alpha_point_deblocking_instance
Definition: h264_sei.h:114
H2645NAL::raw_size
int raw_size
Definition: h2645_parse.h:44
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AV_ONCE_INIT
#define AV_ONCE_INIT
Definition: thread.h:201
h264_class
static const AVClass h264_class
Definition: h264dec.c:1105
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
h264_er_decode_mb
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
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:736
H264SliceContext::edge_emu_buffer
uint8_t * edge_emu_buffer
Definition: h264dec.h:278
hwaccel_internal.h
AVCodecContext::slice_flags
int slice_flags
slice flags
Definition: avcodec.h:915
h264_init_context
static int h264_init_context(AVCodecContext *avctx, H264Context *h)
Definition: h264dec.c:286
H264Ref::parent
const H264Picture * parent
Definition: h264dec.h:169
H264Ref::linesize
int linesize[3]
Definition: h264dec.h:163
AVCodecContext::internal
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:476
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:279
profiles.h
ff_h264_profiles
const AVProfile ff_h264_profiles[]
Definition: profiles.c:70
PPS::init_qp
int init_qp
pic_init_qp_minus26 + 26
Definition: h264_ps.h:120
H264Picture::mb_height
int mb_height
Definition: h264dec.h:152
H264SEIGreenMetaData
Definition: h264_sei.h:106
UPDATE_THREAD_CONTEXT
#define UPDATE_THREAD_CONTEXT(func)
Definition: codec_internal.h:281
FF_HW_HAS_CB
#define FF_HW_HAS_CB(avctx, function)
Definition: hwaccel_internal.h:177
H264SliceContext::top_borders_allocated
int top_borders_allocated[2]
Definition: h264dec.h:282
atomic_load_explicit
#define atomic_load_explicit(object, order)
Definition: stdatomic.h:96
AVOnce
#define AVOnce
Definition: thread.h:200
H264SEIGreenMetaData::percent_intra_coded_macroblocks
uint8_t percent_intra_coded_macroblocks
Definition: h264_sei.h:112
h264_ps.h
h264_vlc_init
static AVOnce h264_vlc_init
Definition: h264dec.c:379
DELAYED_PIC_REF
#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
av_video_enc_params_create_side_data
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.
Definition: video_enc_params.c:58
ERContext::opaque
void * opaque
Definition: error_resilience.h:88
f
f
Definition: af_crystalizer.c:121
H264SEIGreenMetaData::percent_six_tap_filtering
uint8_t percent_six_tap_filtering
Definition: h264_sei.h:113
AVCodecContext::flags2
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:528
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:492
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:106
av_frame_ref
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:361
h264_options
static const AVOption h264_options[]
Definition: h264dec.c:1095
codec_internal.h
H264SEIGreenMetaData::num_seconds
uint16_t num_seconds
Definition: h264_sei.h:109
rectangle.h
H264_NAL_SEI
@ H264_NAL_SEI
Definition: h264.h:40
for
for(k=2;k<=8;++k)
Definition: h264pred_template.c:425
FF_CODEC_CAP_EXPORTS_CROPPING
#define FF_CODEC_CAP_EXPORTS_CROPPING
The decoder sets the cropping fields in the output frames manually.
Definition: codec_internal.h:60
AV_NUM_DATA_POINTERS
#define AV_NUM_DATA_POINTERS
Definition: frame.h:341
ERContext::b8_stride
ptrdiff_t b8_stride
Definition: error_resilience.h:62
FF_CODEC_CAP_ALLOCATE_PROGRESS
#define FF_CODEC_CAP_ALLOCATE_PROGRESS
Definition: codec_internal.h:69
H264Picture::decode_error_flags
atomic_int * decode_error_flags
RefStruct reference; its pointee is shared between decoding threads.
Definition: h264dec.h:156
H2645NAL::gb
GetBitContext gb
Definition: h2645_parse.h:47
AV_RB32
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:96
H2645NAL
Definition: h2645_parse.h:34
H264SliceContext::top_borders
uint8_t(*[2] top_borders)[(16 *3) *2]
Definition: h264dec.h:279
H264SEIGreenMetaData::green_metadata_type
uint8_t green_metadata_type
Definition: h264_sei.h:107
ERContext::mb_stride
ptrdiff_t mb_stride
Definition: error_resilience.h:61
FF_THREAD_SLICE
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:1544
AVCodecHWConfigInternal
Definition: hwconfig.h:25
H264SliceContext::mb_y
int mb_y
Definition: h264dec.h:225
av_frame_remove_side_data
void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type)
Remove and free all side data instances of the given type.
Definition: frame.c:919
ff_h2645_packet_split
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:463
height
#define height
ERContext::decode_mb
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)
Definition: error_resilience.h:85
VD
#define VD
Definition: av1dec.c:1472
output_frame
static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
Definition: h264dec.c:871
AV_CODEC_CAP_SLICE_THREADS
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:114
HWACCEL_D3D11VA
#define HWACCEL_D3D11VA(codec)
Definition: hwconfig.h:78
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
HWACCEL_NVDEC
#define HWACCEL_NVDEC(codec)
Definition: hwconfig.h:68
FF_THREAD_FRAME
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:1543
H264SliceContext::mb_mbaff
int mb_mbaff
mb_aff_frame && mb_field_decoding_flag
Definition: h264dec.h:237
emms.h
h264dec.h
ff_h264_decode_seq_parameter_set
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:284
H264Picture::needs_fg
int needs_fg
whether picture needs film grain synthesis (see f_grain)
Definition: h264dec.h:148
is_avcc_extradata
static int is_avcc_extradata(const uint8_t *buf, int buf_size)
Definition: h264dec.c:910
H264Context
H264Context.
Definition: h264dec.h:332
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:245
AV_CODEC_FLAG2_SHOW_ALL
#define AV_CODEC_FLAG2_SHOW_ALL
Show all frames before the first keyframe.
Definition: avcodec.h:376
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:542
av_packet_get_side_data
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, size_t *size)
Get side information from packet.
Definition: avpacket.c:252
H264_NAL_AUXILIARY_SLICE
@ H264_NAL_AUXILIARY_SLICE
Definition: h264.h:53
ff_h264_execute_decode_slices
int ff_h264_execute_decode_slices(H264Context *h)
Call decode_slice() for each context.
Definition: h264_slice.c:2759
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:56
ERContext::mb_width
int mb_width
Definition: error_resilience.h:60
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:622
AVVideoBlockParams
Data structure for storing block-level encoding information.
Definition: video_enc_params.h:120
ff_h264_decode_init_vlc
av_cold void ff_h264_decode_init_vlc(void)
Definition: h264_cavlc.c:315
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:194
AVCodecContext::height
int height
Definition: avcodec.h:621
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:658
ff_h264_alloc_tables
int ff_h264_alloc_tables(H264Context *h)
Allocate tables.
Definition: h264dec.c:182
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:262
HWACCEL_VIDEOTOOLBOX
#define HWACCEL_VIDEOTOOLBOX(codec)
Definition: hwconfig.h:74
avcodec.h
h264_export_enc_params
static int h264_export_enc_params(AVFrame *f, const H264Picture *p)
Definition: h264dec.c:837
AVFrame::decode_error_flags
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:717
ret
ret
Definition: filter_design.txt:187
H2645NAL::raw_data
const uint8_t * raw_data
Definition: h2645_parse.h:45
ERContext::mb_height
int mb_height
Definition: error_resilience.h:60
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:71
FMO
#define FMO
Definition: h264dec.h:55
FF_DEBUG_GREEN_MD
#define FF_DEBUG_GREEN_MD
Definition: avcodec.h:1402
pos
unsigned int pos
Definition: spdifenc.c:413
ff_thread_finish_setup
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call ff_thread_finish_setup() afterwards. If some code can 't be moved
AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS
#define AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS
Decoding only.
Definition: avcodec.h:411
AV_CODEC_FLAG2_CHUNKS
#define AV_CODEC_FLAG2_CHUNKS
Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
Definition: avcodec.h:367
AVCodecContext::draw_horiz_band
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:683
HWACCEL_VULKAN
#define HWACCEL_VULKAN(codec)
Definition: hwconfig.h:76
H264_NAL_DPA
@ H264_NAL_DPA
Definition: h264.h:36
OFFSET
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option keep it simple and lowercase description are in without and describe what they for example set the foo of the bar offset is the offset of the field in your see the OFFSET() macro
AVCodecContext
main external API structure.
Definition: avcodec.h:441
AVCodecContext::active_thread_type
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:1551
get_ue_golomb_31
static int get_ue_golomb_31(GetBitContext *gb)
read unsigned exp golomb code, constraint to a max of 31.
Definition: golomb.h:120
H264SliceContext::bipred_scratchpad
uint8_t * bipred_scratchpad
Definition: h264dec.h:277
H264_NAL_SLICE
@ H264_NAL_SLICE
Definition: h264.h:35
error_resilience.h
FF_HW_CALL
#define FF_HW_CALL(avctx, function,...)
Definition: hwaccel_internal.h:171
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
H264Picture::mb_width
int mb_width
Definition: h264dec.h:152
ff_h264_unref_picture
void ff_h264_unref_picture(H264Picture *pic)
Definition: h264_picture.c:39
AVFrame::metadata
AVDictionary * metadata
metadata.
Definition: frame.h:708
atomic_fetch_or_explicit
#define atomic_fetch_or_explicit(object, operand, order)
Definition: stdatomic.h:155
fill_rectangle
static void fill_rectangle(int x, int y, int w, int h)
Definition: ffplay.c:826
H264Picture
Definition: h264dec.h:106
ERContext::error_status_table
uint8_t * error_status_table
Definition: error_resilience.h:66
H264_NAL_SPS
@ H264_NAL_SPS
Definition: h264.h:41
ERContext::quarter_sample
int quarter_sample
Definition: error_resilience.h:82
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:112
AVCodecContext::ticks_per_frame
attribute_deprecated int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:579
H264_NAL_SPS_EXT
@ H264_NAL_SPS_EXT
Definition: h264.h:47
AV_CODEC_CAP_DELAY
#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:76
PART_NOT_AVAILABLE
#define PART_NOT_AVAILABLE
Definition: h264pred.h:89
ff_h264_field_end
int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
Definition: h264_picture.c:189
H264_NAL_DPC
@ H264_NAL_DPC
Definition: h264.h:38
AVCodecContext::debug
int debug
debug
Definition: avcodec.h:1388
H264SliceContext::ref_list
H264Ref ref_list[2][48]
0..15: frame refs, 16..47: mbaff field refs.
Definition: h264dec.h:264
H264SliceContext::non_zero_count_cache
uint8_t non_zero_count_cache[15 *8]
non zero coeff count cache.
Definition: h264dec.h:288
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:72
ERContext::er_temp_buffer
uint8_t * er_temp_buffer
Definition: error_resilience.h:67
h264_decode_flush
static void h264_decode_flush(AVCodecContext *avctx)
Definition: h264dec.c:479
desc
const char * desc
Definition: libsvtav1.c:83
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
flush
void(* flush)(AVBSFContext *ctx)
Definition: dts2pts_bsf.c:367
H264_NAL_IDR_SLICE
@ H264_NAL_IDR_SLICE
Definition: h264.h:39
get_ue_golomb_long
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:104
ff_h264_sei_stereo_mode
const char * ff_h264_sei_stereo_mode(const H2645SEIFramePacking *h)
Get stereo_mode string from the h264 frame_packing_arrangement.
Definition: h264_sei.c:306
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
H264SliceContext::er
ERContext * er
Definition: h264dec.h:175
AVPacket
This structure stores compressed data.
Definition: packet.h:468
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:468
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
av_dict_set
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:88
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
HWACCEL_VAAPI
#define HWACCEL_VAAPI(codec)
Definition: hwconfig.h:70
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:621
h264.h
imgutils.h
H264SliceContext::edge_emu_buffer_allocated
int edge_emu_buffer_allocated
Definition: h264dec.h:281
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
UPDATE_THREAD_CONTEXT_FOR_USER
#define UPDATE_THREAD_CONTEXT_FOR_USER(func)
Definition: codec_internal.h:283
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
av_video_enc_params_block
static av_always_inline AVVideoBlockParams * av_video_enc_params_block(AVVideoEncParams *par, unsigned int idx)
Get the block at the specified.
Definition: video_enc_params.h:143
h
h
Definition: vp9dsp_template.c:2038
H264_MAX_PICTURE_COUNT
#define H264_MAX_PICTURE_COUNT
Definition: h264dec.h:49
H264SEIGreenMetaData::num_pictures
uint16_t num_pictures
Definition: h264_sei.h:110
H264SliceContext::bipred_scratchpad_allocated
int bipred_scratchpad_allocated
Definition: h264dec.h:280
av_image_copy
void av_image_copy(uint8_t *const dst_data[4], const int dst_linesizes[4], const uint8_t *const 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:422
AVDISCARD_NONREF
@ AVDISCARD_NONREF
discard all non reference
Definition: defs.h:215
H264_NAL_AUD
@ H264_NAL_AUD
Definition: h264.h:43
int
int
Definition: ffmpeg_filter.c:368
send_next_delayed_frame
static int send_next_delayed_frame(H264Context *h, AVFrame *dst_frame, int *got_frame, int buf_index)
Definition: h264dec.c:989
H264Ref::reference
int reference
Definition: h264dec.h:165
AV_CODEC_EXPORT_DATA_FILM_GRAIN
#define AV_CODEC_EXPORT_DATA_FILM_GRAIN
Decoding only.
Definition: avcodec.h:416
video_enc_params.h
ff_print_debug_info2
void ff_print_debug_info2(AVCodecContext *avctx, AVFrame *pict, const uint8_t *mbskip_table, const uint32_t *mbtype_table, const int8_t *qscale_table, int16_t(*const motion_val[2])[2], int mb_width, int mb_height, int mb_stride, int quarter_sample)
Print debugging info for the given picture.
Definition: mpegutils.c:158
AV_RB16
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:98
H264SliceContext::mb_field_decoding_flag
int mb_field_decoding_flag
Definition: h264dec.h:236
ff_h264_set_erpic
void ff_h264_set_erpic(ERPicture *dst, const H264Picture *src)
Definition: h264_picture.c:166
H264SEIGreenMetaData::xsd_metric_type
uint8_t xsd_metric_type
Definition: h264_sei.h:115