FFmpeg  4.4
h264dec.c
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1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... decoder
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * H.264 / AVC / MPEG-4 part10 codec.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27 
28 #define UNCHECKED_BITSTREAM_READER 1
29 
30 #include "libavutil/avassert.h"
31 #include "libavutil/display.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/stereo3d.h"
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 
142  av_freep(&h->intra4x4_pred_mode);
143  av_freep(&h->chroma_pred_mode_table);
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);
148  av_freep(&h->non_zero_count);
149  av_freep(&h->slice_table_base);
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 
156  av_buffer_pool_uninit(&h->qscale_table_pool);
157  av_buffer_pool_uninit(&h->mb_type_pool);
158  av_buffer_pool_uninit(&h->motion_val_pool);
159  av_buffer_pool_uninit(&h->ref_index_pool);
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  const int st_size = big_mb_num + h->mb_stride;
186  int x, y;
187 
188  if (!FF_ALLOCZ_TYPED_ARRAY(h->intra4x4_pred_mode, row_mb_num * 8) ||
189  !FF_ALLOCZ_TYPED_ARRAY(h->non_zero_count, big_mb_num) ||
190  !FF_ALLOCZ_TYPED_ARRAY(h->slice_table_base, st_size) ||
191  !FF_ALLOCZ_TYPED_ARRAY(h->cbp_table, big_mb_num) ||
192  !FF_ALLOCZ_TYPED_ARRAY(h->chroma_pred_mode_table, big_mb_num) ||
193  !FF_ALLOCZ_TYPED_ARRAY(h->mvd_table[0], row_mb_num * 8) ||
194  !FF_ALLOCZ_TYPED_ARRAY(h->mvd_table[1], row_mb_num * 8) ||
195  !FF_ALLOCZ_TYPED_ARRAY(h->direct_table, big_mb_num * 4) ||
196  !FF_ALLOCZ_TYPED_ARRAY(h->list_counts, big_mb_num) ||
197  !FF_ALLOCZ_TYPED_ARRAY(h->mb2b_xy, big_mb_num) ||
198  !FF_ALLOCZ_TYPED_ARRAY(h->mb2br_xy, big_mb_num))
199  return AVERROR(ENOMEM);
200  h->slice_ctx[0].intra4x4_pred_mode = h->intra4x4_pred_mode;
201  h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
202  h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
203  memset(h->slice_table_base, -1,
204  st_size * sizeof(*h->slice_table_base));
205  h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
206  for (y = 0; y < h->mb_height; y++)
207  for (x = 0; x < h->mb_width; x++) {
208  const int mb_xy = x + y * h->mb_stride;
209  const int b_xy = 4 * x + 4 * y * h->b_stride;
210 
211  h->mb2b_xy[mb_xy] = b_xy;
212  h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
213  }
214 
215  return 0;
216 }
217 
218 /**
219  * Init context
220  * Allocate buffers which are not shared amongst multiple threads.
221  */
223 {
224  ERContext *er = &sl->er;
225  int mb_array_size = h->mb_height * h->mb_stride;
226  int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
227  int c_size = h->mb_stride * (h->mb_height + 1);
228  int yc_size = y_size + 2 * c_size;
229  int x, y, i;
230 
231  sl->ref_cache[0][scan8[5] + 1] =
232  sl->ref_cache[0][scan8[7] + 1] =
233  sl->ref_cache[0][scan8[13] + 1] =
234  sl->ref_cache[1][scan8[5] + 1] =
235  sl->ref_cache[1][scan8[7] + 1] =
236  sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
237 
238  if (sl != h->slice_ctx) {
239  memset(er, 0, sizeof(*er));
240  } else if (CONFIG_ERROR_RESILIENCE) {
241  const int er_size = h->mb_height * h->mb_stride * (4*sizeof(int) + 1);
242 
243  /* init ER */
244  er->avctx = h->avctx;
246  er->opaque = h;
247  er->quarter_sample = 1;
248 
249  er->mb_num = h->mb_num;
250  er->mb_width = h->mb_width;
251  er->mb_height = h->mb_height;
252  er->mb_stride = h->mb_stride;
253  er->b8_stride = h->mb_width * 2 + 1;
254 
255  // error resilience code looks cleaner with this
256  if (!FF_ALLOCZ_TYPED_ARRAY(er->mb_index2xy, h->mb_num + 1) ||
257  !FF_ALLOCZ_TYPED_ARRAY(er->error_status_table, mb_array_size) ||
258  !FF_ALLOCZ_TYPED_ARRAY(er->er_temp_buffer, er_size) ||
259  !FF_ALLOCZ_TYPED_ARRAY(sl->dc_val_base, yc_size))
260  return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
261 
262  for (y = 0; y < h->mb_height; y++)
263  for (x = 0; x < h->mb_width; x++)
264  er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
265 
266  er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
267  h->mb_stride + h->mb_width;
268  er->dc_val[0] = sl->dc_val_base + h->mb_width * 2 + 2;
269  er->dc_val[1] = sl->dc_val_base + y_size + h->mb_stride + 1;
270  er->dc_val[2] = er->dc_val[1] + c_size;
271  for (i = 0; i < yc_size; i++)
272  sl->dc_val_base[i] = 1024;
273  }
274 
275  return 0;
276 }
277 
279 {
280  int i;
281 
282  h->avctx = avctx;
283  h->cur_chroma_format_idc = -1;
284 
285  h->width_from_caller = avctx->width;
286  h->height_from_caller = avctx->height;
287 
288  h->workaround_bugs = avctx->workaround_bugs;
289  h->flags = avctx->flags;
290  h->poc.prev_poc_msb = 1 << 16;
291  h->recovery_frame = -1;
292  h->frame_recovered = 0;
293  h->poc.prev_frame_num = -1;
294  h->sei.frame_packing.arrangement_cancel_flag = -1;
295  h->sei.unregistered.x264_build = -1;
296 
297  h->next_outputed_poc = INT_MIN;
298  for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
299  h->last_pocs[i] = INT_MIN;
300 
301  ff_h264_sei_uninit(&h->sei);
302 
303  h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? avctx->thread_count : 1;
304  h->slice_ctx = av_mallocz_array(h->nb_slice_ctx, sizeof(*h->slice_ctx));
305  if (!h->slice_ctx) {
306  h->nb_slice_ctx = 0;
307  return AVERROR(ENOMEM);
308  }
309 
310  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
311  h->DPB[i].f = av_frame_alloc();
312  if (!h->DPB[i].f)
313  return AVERROR(ENOMEM);
314  }
315 
316  h->cur_pic.f = av_frame_alloc();
317  if (!h->cur_pic.f)
318  return AVERROR(ENOMEM);
319 
320  h->last_pic_for_ec.f = av_frame_alloc();
321  if (!h->last_pic_for_ec.f)
322  return AVERROR(ENOMEM);
323 
324  for (i = 0; i < h->nb_slice_ctx; i++)
325  h->slice_ctx[i].h264 = h;
326 
327  return 0;
328 }
329 
331 {
332  H264Context *h = avctx->priv_data;
333  int i;
334 
337 
338  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
339  ff_h264_unref_picture(h, &h->DPB[i]);
340  av_frame_free(&h->DPB[i].f);
341  }
342  memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
343 
344  h->cur_pic_ptr = NULL;
345 
346  av_freep(&h->slice_ctx);
347  h->nb_slice_ctx = 0;
348 
349  ff_h264_sei_uninit(&h->sei);
350  ff_h264_ps_uninit(&h->ps);
351 
352  ff_h2645_packet_uninit(&h->pkt);
353 
354  ff_h264_unref_picture(h, &h->cur_pic);
355  av_frame_free(&h->cur_pic.f);
356  ff_h264_unref_picture(h, &h->last_pic_for_ec);
357  av_frame_free(&h->last_pic_for_ec.f);
358 
359  return 0;
360 }
361 
363 
365 {
366  H264Context *h = avctx->priv_data;
367  int ret;
368 
369  ret = h264_init_context(avctx, h);
370  if (ret < 0)
371  return ret;
372 
374  if (ret != 0) {
375  av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
376  return AVERROR_UNKNOWN;
377  }
378 
379  if (avctx->ticks_per_frame == 1) {
380  if(h->avctx->time_base.den < INT_MAX/2) {
381  h->avctx->time_base.den *= 2;
382  } else
383  h->avctx->time_base.num /= 2;
384  }
385  avctx->ticks_per_frame = 2;
386 
387  if (!avctx->internal->is_copy) {
388  if (avctx->extradata_size > 0 && avctx->extradata) {
390  &h->ps, &h->is_avc, &h->nal_length_size,
391  avctx->err_recognition, avctx);
392  if (ret < 0) {
393  int explode = avctx->err_recognition & AV_EF_EXPLODE;
394  av_log(avctx, explode ? AV_LOG_ERROR: AV_LOG_WARNING,
395  "Error decoding the extradata\n");
396  if (explode) {
397  return ret;
398  }
399  ret = 0;
400  }
401  }
402  }
403 
404  if (h->ps.sps && h->ps.sps->bitstream_restriction_flag &&
405  h->avctx->has_b_frames < h->ps.sps->num_reorder_frames) {
406  h->avctx->has_b_frames = h->ps.sps->num_reorder_frames;
407  }
408 
410 
411  if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
412  h->enable_er = 0;
413 
414  if (h->enable_er && (avctx->active_thread_type & FF_THREAD_SLICE)) {
415  av_log(avctx, AV_LOG_WARNING,
416  "Error resilience with slice threads is enabled. It is unsafe and unsupported and may crash. "
417  "Use it at your own risk\n");
418  }
419 
420  return 0;
421 }
422 
423 /**
424  * instantaneous decoder refresh.
425  */
426 static void idr(H264Context *h)
427 {
428  int i;
430  h->poc.prev_frame_num =
431  h->poc.prev_frame_num_offset = 0;
432  h->poc.prev_poc_msb = 1<<16;
433  h->poc.prev_poc_lsb = -1;
434  for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
435  h->last_pocs[i] = INT_MIN;
436 }
437 
438 /* forget old pics after a seek */
440 {
441  int i, j;
442 
443  h->next_outputed_poc = INT_MIN;
444  h->prev_interlaced_frame = 1;
445  idr(h);
446 
447  h->poc.prev_frame_num = -1;
448  if (h->cur_pic_ptr) {
449  h->cur_pic_ptr->reference = 0;
450  for (j=i=0; h->delayed_pic[i]; i++)
451  if (h->delayed_pic[i] != h->cur_pic_ptr)
452  h->delayed_pic[j++] = h->delayed_pic[i];
453  h->delayed_pic[j] = NULL;
454  }
455  ff_h264_unref_picture(h, &h->last_pic_for_ec);
456 
457  h->first_field = 0;
458  h->recovery_frame = -1;
459  h->frame_recovered = 0;
460  h->current_slice = 0;
461  h->mmco_reset = 1;
462 }
463 
465 {
466  H264Context *h = avctx->priv_data;
467  int i;
468 
469  memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
470 
472  ff_h264_sei_uninit(&h->sei);
473 
474  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
475  ff_h264_unref_picture(h, &h->DPB[i]);
476  h->cur_pic_ptr = NULL;
477  ff_h264_unref_picture(h, &h->cur_pic);
478 
479  h->mb_y = 0;
480 
482  h->context_initialized = 0;
483 }
484 
486 {
487  int nals_needed = 0;
488  int first_slice = 0;
489  int i, ret;
490 
491  for (i = 0; i < h->pkt.nb_nals; i++) {
492  H2645NAL *nal = &h->pkt.nals[i];
493  GetBitContext gb;
494 
495  /* packets can sometimes contain multiple PPS/SPS,
496  * e.g. two PAFF field pictures in one packet, or a demuxer
497  * which splits NALs strangely if so, when frame threading we
498  * can't start the next thread until we've read all of them */
499  switch (nal->type) {
500  case H264_NAL_SPS:
501  case H264_NAL_PPS:
502  nals_needed = i;
503  break;
504  case H264_NAL_DPA:
505  case H264_NAL_IDR_SLICE:
506  case H264_NAL_SLICE:
507  ret = init_get_bits8(&gb, nal->data + 1, nal->size - 1);
508  if (ret < 0) {
509  av_log(h->avctx, AV_LOG_ERROR, "Invalid zero-sized VCL NAL unit\n");
510  if (h->avctx->err_recognition & AV_EF_EXPLODE)
511  return ret;
512 
513  break;
514  }
515  if (!get_ue_golomb_long(&gb) || // first_mb_in_slice
516  !first_slice ||
517  first_slice != nal->type)
518  nals_needed = i;
519  if (!first_slice)
520  first_slice = nal->type;
521  }
522  }
523 
524  return nals_needed;
525 }
526 
527 static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
528 {
529  av_log(logctx, AV_LOG_DEBUG, "Green Metadata Info SEI message\n");
530  av_log(logctx, AV_LOG_DEBUG, " green_metadata_type: %d\n", gm->green_metadata_type);
531 
532  if (gm->green_metadata_type == 0) {
533  av_log(logctx, AV_LOG_DEBUG, " green_metadata_period_type: %d\n", gm->period_type);
534 
535  if (gm->period_type == 2)
536  av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_seconds: %d\n", gm->num_seconds);
537  else if (gm->period_type == 3)
538  av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_pictures: %d\n", gm->num_pictures);
539 
540  av_log(logctx, AV_LOG_DEBUG, " SEI GREEN Complexity Metrics: %f %f %f %f\n",
541  (float)gm->percent_non_zero_macroblocks/255,
542  (float)gm->percent_intra_coded_macroblocks/255,
543  (float)gm->percent_six_tap_filtering/255,
545 
546  } else if (gm->green_metadata_type == 1) {
547  av_log(logctx, AV_LOG_DEBUG, " xsd_metric_type: %d\n", gm->xsd_metric_type);
548 
549  if (gm->xsd_metric_type == 0)
550  av_log(logctx, AV_LOG_DEBUG, " xsd_metric_value: %f\n",
551  (float)gm->xsd_metric_value/100);
552  }
553 }
554 
555 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
556 {
557  AVCodecContext *const avctx = h->avctx;
558  int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
559  int idr_cleared=0;
560  int i, ret = 0;
561 
562  h->has_slice = 0;
563  h->nal_unit_type= 0;
564 
565  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
566  h->current_slice = 0;
567  if (!h->first_field) {
568  h->cur_pic_ptr = NULL;
569  ff_h264_sei_uninit(&h->sei);
570  }
571  }
572 
573  if (h->nal_length_size == 4) {
574  if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
575  h->is_avc = 0;
576  }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
577  h->is_avc = 1;
578  }
579 
580  ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc, h->nal_length_size,
581  avctx->codec_id, 0, 0);
582  if (ret < 0) {
583  av_log(avctx, AV_LOG_ERROR,
584  "Error splitting the input into NAL units.\n");
585  return ret;
586  }
587 
588  if (avctx->active_thread_type & FF_THREAD_FRAME)
589  nals_needed = get_last_needed_nal(h);
590  if (nals_needed < 0)
591  return nals_needed;
592 
593  for (i = 0; i < h->pkt.nb_nals; i++) {
594  H2645NAL *nal = &h->pkt.nals[i];
595  int max_slice_ctx, err;
596 
597  if (avctx->skip_frame >= AVDISCARD_NONREF &&
598  nal->ref_idc == 0 && nal->type != H264_NAL_SEI)
599  continue;
600 
601  // FIXME these should stop being context-global variables
602  h->nal_ref_idc = nal->ref_idc;
603  h->nal_unit_type = nal->type;
604 
605  err = 0;
606  switch (nal->type) {
607  case H264_NAL_IDR_SLICE:
608  if ((nal->data[1] & 0xFC) == 0x98) {
609  av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
610  h->next_outputed_poc = INT_MIN;
611  ret = -1;
612  goto end;
613  }
614  if(!idr_cleared) {
615  idr(h); // FIXME ensure we don't lose some frames if there is reordering
616  }
617  idr_cleared = 1;
618  h->has_recovery_point = 1;
619  case H264_NAL_SLICE:
620  h->has_slice = 1;
621 
622  if ((err = ff_h264_queue_decode_slice(h, nal))) {
623  H264SliceContext *sl = h->slice_ctx + h->nb_slice_ctx_queued;
624  sl->ref_count[0] = sl->ref_count[1] = 0;
625  break;
626  }
627 
628  if (h->current_slice == 1) {
629  if (avctx->active_thread_type & FF_THREAD_FRAME &&
630  i >= nals_needed && !h->setup_finished && h->cur_pic_ptr) {
631  ff_thread_finish_setup(avctx);
632  h->setup_finished = 1;
633  }
634 
635  if (h->avctx->hwaccel &&
636  (ret = h->avctx->hwaccel->start_frame(h->avctx, buf, buf_size)) < 0)
637  goto end;
638  }
639 
640  max_slice_ctx = avctx->hwaccel ? 1 : h->nb_slice_ctx;
641  if (h->nb_slice_ctx_queued == max_slice_ctx) {
642  if (h->avctx->hwaccel) {
643  ret = avctx->hwaccel->decode_slice(avctx, nal->raw_data, nal->raw_size);
644  h->nb_slice_ctx_queued = 0;
645  } else
647  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
648  goto end;
649  }
650  break;
651  case H264_NAL_DPA:
652  case H264_NAL_DPB:
653  case H264_NAL_DPC:
654  avpriv_request_sample(avctx, "data partitioning");
655  break;
656  case H264_NAL_SEI:
657  ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
658  h->has_recovery_point = h->has_recovery_point || h->sei.recovery_point.recovery_frame_cnt != -1;
659  if (avctx->debug & FF_DEBUG_GREEN_MD)
660  debug_green_metadata(&h->sei.green_metadata, h->avctx);
661  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
662  goto end;
663  break;
664  case H264_NAL_SPS: {
665  GetBitContext tmp_gb = nal->gb;
666  if (avctx->hwaccel && avctx->hwaccel->decode_params) {
667  ret = avctx->hwaccel->decode_params(avctx,
668  nal->type,
669  nal->raw_data,
670  nal->raw_size);
671  if (ret < 0)
672  goto end;
673  }
674  if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
675  break;
676  av_log(h->avctx, AV_LOG_DEBUG,
677  "SPS decoding failure, trying again with the complete NAL\n");
678  init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
679  if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
680  break;
681  ff_h264_decode_seq_parameter_set(&nal->gb, avctx, &h->ps, 1);
682  break;
683  }
684  case H264_NAL_PPS:
685  if (avctx->hwaccel && avctx->hwaccel->decode_params) {
686  ret = avctx->hwaccel->decode_params(avctx,
687  nal->type,
688  nal->raw_data,
689  nal->raw_size);
690  if (ret < 0)
691  goto end;
692  }
693  ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
694  nal->size_bits);
695  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
696  goto end;
697  break;
698  case H264_NAL_AUD:
700  case H264_NAL_END_STREAM:
702  case H264_NAL_SPS_EXT:
704  break;
705  default:
706  av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
707  nal->type, nal->size_bits);
708  }
709 
710  if (err < 0) {
711  av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
712  }
713  }
714 
716  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
717  goto end;
718 
719  // set decode_error_flags to allow users to detect concealed decoding errors
720  if ((ret < 0 || h->slice_ctx->er.error_occurred) && h->cur_pic_ptr) {
721  h->cur_pic_ptr->f->decode_error_flags |= FF_DECODE_ERROR_DECODE_SLICES;
722  }
723 
724  ret = 0;
725 end:
726 
727 #if CONFIG_ERROR_RESILIENCE
728  /*
729  * FIXME: Error handling code does not seem to support interlaced
730  * when slices span multiple rows
731  * The ff_er_add_slice calls don't work right for bottom
732  * fields; they cause massive erroneous error concealing
733  * Error marking covers both fields (top and bottom).
734  * This causes a mismatched s->error_count
735  * and a bad error table. Further, the error count goes to
736  * INT_MAX when called for bottom field, because mb_y is
737  * past end by one (callers fault) and resync_mb_y != 0
738  * causes problems for the first MB line, too.
739  */
740  if (!FIELD_PICTURE(h) && h->current_slice && h->enable_er) {
741 
742  H264SliceContext *sl = h->slice_ctx;
743  int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
744 
745  ff_h264_set_erpic(&sl->er.cur_pic, h->cur_pic_ptr);
746 
747  if (use_last_pic) {
748  ff_h264_set_erpic(&sl->er.last_pic, &h->last_pic_for_ec);
749  sl->ref_list[0][0].parent = &h->last_pic_for_ec;
750  memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
751  memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
752  sl->ref_list[0][0].reference = h->last_pic_for_ec.reference;
753  } else if (sl->ref_count[0]) {
754  ff_h264_set_erpic(&sl->er.last_pic, sl->ref_list[0][0].parent);
755  } else
757 
758  if (sl->ref_count[1])
759  ff_h264_set_erpic(&sl->er.next_pic, sl->ref_list[1][0].parent);
760 
761  sl->er.ref_count = sl->ref_count[0];
762 
763  ff_er_frame_end(&sl->er);
764  if (use_last_pic)
765  memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
766  }
767 #endif /* CONFIG_ERROR_RESILIENCE */
768  /* clean up */
769  if (h->cur_pic_ptr && !h->droppable && h->has_slice) {
770  ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
771  h->picture_structure == PICT_BOTTOM_FIELD);
772  }
773 
774  return (ret < 0) ? ret : buf_size;
775 }
776 
777 /**
778  * Return the number of bytes consumed for building the current frame.
779  */
780 static int get_consumed_bytes(int pos, int buf_size)
781 {
782  if (pos == 0)
783  pos = 1; // avoid infinite loops (I doubt that is needed but...)
784  if (pos + 10 > buf_size)
785  pos = buf_size; // oops ;)
786 
787  return pos;
788 }
789 
791 {
792  AVVideoEncParams *par;
793  unsigned int nb_mb = p->mb_height * p->mb_width;
794  unsigned int x, y;
795 
797  if (!par)
798  return AVERROR(ENOMEM);
799 
800  par->qp = p->pps->init_qp;
801 
802  par->delta_qp[1][0] = p->pps->chroma_qp_index_offset[0];
803  par->delta_qp[1][1] = p->pps->chroma_qp_index_offset[0];
804  par->delta_qp[2][0] = p->pps->chroma_qp_index_offset[1];
805  par->delta_qp[2][1] = p->pps->chroma_qp_index_offset[1];
806 
807  for (y = 0; y < p->mb_height; y++)
808  for (x = 0; x < p->mb_width; x++) {
809  const unsigned int block_idx = y * p->mb_width + x;
810  const unsigned int mb_xy = y * p->mb_stride + x;
812 
813  b->src_x = x * 16;
814  b->src_y = y * 16;
815  b->w = 16;
816  b->h = 16;
817 
818  b->delta_qp = p->qscale_table[mb_xy] - par->qp;
819  }
820 
821  return 0;
822 }
823 
824 static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
825 {
826  AVFrame *src = srcp->f;
827  int ret;
828 
829  ret = av_frame_ref(dst, src);
830  if (ret < 0)
831  return ret;
832 
833  av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(&h->sei.frame_packing), 0);
834 
835  if (srcp->sei_recovery_frame_cnt == 0)
836  dst->key_frame = 1;
837 
838  if (h->avctx->export_side_data & AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS) {
839  ret = h264_export_enc_params(dst, srcp);
840  if (ret < 0)
841  goto fail;
842  }
843 
844  return 0;
845 fail:
846  av_frame_unref(dst);
847  return ret;
848 }
849 
850 static int is_avcc_extradata(const uint8_t *buf, int buf_size)
851 {
852  int cnt= buf[5]&0x1f;
853  const uint8_t *p= buf+6;
854  if (!cnt)
855  return 0;
856  while(cnt--){
857  int nalsize= AV_RB16(p) + 2;
858  if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
859  return 0;
860  p += nalsize;
861  }
862  cnt = *(p++);
863  if(!cnt)
864  return 0;
865  while(cnt--){
866  int nalsize= AV_RB16(p) + 2;
867  if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8)
868  return 0;
869  p += nalsize;
870  }
871  return 1;
872 }
873 
874 static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
875 {
876  int ret;
877 
878  if (((h->avctx->flags & AV_CODEC_FLAG_OUTPUT_CORRUPT) ||
879  (h->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL) ||
880  out->recovered)) {
881 
882  if (!h->avctx->hwaccel &&
883  (out->field_poc[0] == INT_MAX ||
884  out->field_poc[1] == INT_MAX)
885  ) {
886  int p;
887  AVFrame *f = out->f;
888  int field = out->field_poc[0] == INT_MAX;
889  uint8_t *dst_data[4];
890  int linesizes[4];
891  const uint8_t *src_data[4];
892 
893  av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
894 
895  for (p = 0; p<4; p++) {
896  dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
897  src_data[p] = f->data[p] + field *f->linesize[p];
898  linesizes[p] = 2*f->linesize[p];
899  }
900 
901  av_image_copy(dst_data, linesizes, src_data, linesizes,
902  f->format, f->width, f->height>>1);
903  }
904 
905  ret = output_frame(h, dst, out);
906  if (ret < 0)
907  return ret;
908 
909  *got_frame = 1;
910 
911  if (CONFIG_MPEGVIDEO) {
912  ff_print_debug_info2(h->avctx, dst, NULL,
913  out->mb_type,
914  out->qscale_table,
915  out->motion_val,
916  NULL,
917  h->mb_width, h->mb_height, h->mb_stride, 1);
918  }
919  }
920 
921  return 0;
922 }
923 
925  int *got_frame, int buf_index)
926 {
927  int ret, i, out_idx;
928  H264Picture *out = h->delayed_pic[0];
929 
930  h->cur_pic_ptr = NULL;
931  h->first_field = 0;
932 
933  out_idx = 0;
934  for (i = 1;
935  h->delayed_pic[i] &&
936  !h->delayed_pic[i]->f->key_frame &&
937  !h->delayed_pic[i]->mmco_reset;
938  i++)
939  if (h->delayed_pic[i]->poc < out->poc) {
940  out = h->delayed_pic[i];
941  out_idx = i;
942  }
943 
944  for (i = out_idx; h->delayed_pic[i]; i++)
945  h->delayed_pic[i] = h->delayed_pic[i + 1];
946 
947  if (out) {
948  out->reference &= ~DELAYED_PIC_REF;
949  ret = finalize_frame(h, dst_frame, out, got_frame);
950  if (ret < 0)
951  return ret;
952  }
953 
954  return buf_index;
955 }
956 
957 static int h264_decode_frame(AVCodecContext *avctx, void *data,
958  int *got_frame, AVPacket *avpkt)
959 {
960  const uint8_t *buf = avpkt->data;
961  int buf_size = avpkt->size;
962  H264Context *h = avctx->priv_data;
963  AVFrame *pict = data;
964  int buf_index;
965  int ret;
966 
967  h->flags = avctx->flags;
968  h->setup_finished = 0;
969  h->nb_slice_ctx_queued = 0;
970 
971  ff_h264_unref_picture(h, &h->last_pic_for_ec);
972 
973  /* end of stream, output what is still in the buffers */
974  if (buf_size == 0)
975  return send_next_delayed_frame(h, pict, got_frame, 0);
976 
978  buffer_size_t side_size;
979  uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
980  ff_h264_decode_extradata(side, side_size,
981  &h->ps, &h->is_avc, &h->nal_length_size,
982  avctx->err_recognition, avctx);
983  }
984  if (h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC) {
985  if (is_avcc_extradata(buf, buf_size))
986  return ff_h264_decode_extradata(buf, buf_size,
987  &h->ps, &h->is_avc, &h->nal_length_size,
988  avctx->err_recognition, avctx);
989  }
990 
991  buf_index = decode_nal_units(h, buf, buf_size);
992  if (buf_index < 0)
993  return AVERROR_INVALIDDATA;
994 
995  if (!h->cur_pic_ptr && h->nal_unit_type == H264_NAL_END_SEQUENCE) {
996  av_assert0(buf_index <= buf_size);
997  return send_next_delayed_frame(h, pict, got_frame, buf_index);
998  }
999 
1000  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && (!h->cur_pic_ptr || !h->has_slice)) {
1001  if (avctx->skip_frame >= AVDISCARD_NONREF ||
1002  buf_size >= 4 && !memcmp("Q264", buf, 4))
1003  return buf_size;
1004  av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1005  return AVERROR_INVALIDDATA;
1006  }
1007 
1008  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
1009  (h->mb_y >= h->mb_height && h->mb_height)) {
1010  if ((ret = ff_h264_field_end(h, &h->slice_ctx[0], 0)) < 0)
1011  return ret;
1012 
1013  /* Wait for second field. */
1014  if (h->next_output_pic) {
1015  ret = finalize_frame(h, pict, h->next_output_pic, got_frame);
1016  if (ret < 0)
1017  return ret;
1018  }
1019  }
1020 
1021  av_assert0(pict->buf[0] || !*got_frame);
1022 
1023  ff_h264_unref_picture(h, &h->last_pic_for_ec);
1024 
1025  return get_consumed_bytes(buf_index, buf_size);
1026 }
1027 
1028 #define OFFSET(x) offsetof(H264Context, x)
1029 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1030 static const AVOption h264_options[] = {
1031  { "is_avc", "is avc", OFFSET(is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, 0 },
1032  { "nal_length_size", "nal_length_size", OFFSET(nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, 0 },
1033  { "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
1034  { "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 },
1035  { NULL },
1036 };
1037 
1038 static const AVClass h264_class = {
1039  .class_name = "H264 Decoder",
1040  .item_name = av_default_item_name,
1041  .option = h264_options,
1042  .version = LIBAVUTIL_VERSION_INT,
1043 };
1044 
1046  .name = "h264",
1047  .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1048  .type = AVMEDIA_TYPE_VIDEO,
1049  .id = AV_CODEC_ID_H264,
1050  .priv_data_size = sizeof(H264Context),
1052  .close = h264_decode_end,
1054  .capabilities = /*AV_CODEC_CAP_DRAW_HORIZ_BAND |*/ AV_CODEC_CAP_DR1 |
1057  .hw_configs = (const AVCodecHWConfigInternal *const []) {
1058 #if CONFIG_H264_DXVA2_HWACCEL
1059  HWACCEL_DXVA2(h264),
1060 #endif
1061 #if CONFIG_H264_D3D11VA_HWACCEL
1062  HWACCEL_D3D11VA(h264),
1063 #endif
1064 #if CONFIG_H264_D3D11VA2_HWACCEL
1065  HWACCEL_D3D11VA2(h264),
1066 #endif
1067 #if CONFIG_H264_NVDEC_HWACCEL
1068  HWACCEL_NVDEC(h264),
1069 #endif
1070 #if CONFIG_H264_VAAPI_HWACCEL
1071  HWACCEL_VAAPI(h264),
1072 #endif
1073 #if CONFIG_H264_VDPAU_HWACCEL
1074  HWACCEL_VDPAU(h264),
1075 #endif
1076 #if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
1077  HWACCEL_VIDEOTOOLBOX(h264),
1078 #endif
1079  NULL
1080  },
1083  .flush = h264_decode_flush,
1084  .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
1086  .priv_class = &h264_class,
1087 };
#define av_cold
Definition: attributes.h:88
uint8_t
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Libavcodec external API header.
#define SLICE_FLAG_ALLOW_FIELD
allow draw_horiz_band() with field slices (MPEG-2 field pics)
Definition: avcodec.h:1016
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:1784
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1656
#define FF_DEBUG_GREEN_MD
Definition: avcodec.h:1637
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:1785
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, buffer_size_t *size)
Definition: avpacket.c:368
#define AV_RB32
Definition: intreadwrite.h:130
#define AV_RB16
Definition: intreadwrite.h:53
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
Context Adaptive Binary Arithmetic Coder inline functions.
#define f(width, name)
Definition: cbs_vp9.c:255
#define fail()
Definition: checkasm.h:133
#define FFMIN(a, b)
Definition: common.h:105
#define FFMAX(a, b)
Definition: common.h:103
#define CONFIG_ERROR_RESILIENCE
Definition: config.h:582
#define CONFIG_MPEGVIDEO
Definition: config.h:673
#define NULL
Definition: coverity.c:32
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
Display matrix.
void ff_er_frame_end(ERContext *s)
@ HWACCEL_VIDEOTOOLBOX
Definition: ffmpeg.h:62
int
static void fill_rectangle(int x, int y, int w, int h)
Definition: ffplay.c:828
#define FF_DECODE_ERROR_DECODE_SLICES
Definition: frame.h:617
#define AV_NUM_DATA_POINTERS
Definition: frame.h:319
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:677
exp golomb vlc stuff
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:106
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
#define AV_CODEC_FLAG2_SHOW_ALL
Show all frames before the first keyframe.
Definition: avcodec.h:376
#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:77
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:112
#define AV_CODEC_FLAG2_CHUNKS
Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
Definition: avcodec.h:367
#define AV_CODEC_FLAG_OUTPUT_CORRUPT
Output even those frames that might be corrupted.
Definition: avcodec.h:283
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:108
#define AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS
Decoding only.
Definition: avcodec.h:412
@ AV_CODEC_ID_H264
Definition: codec_id.h:76
@ AVDISCARD_NONREF
discard all non reference
Definition: avcodec.h:232
@ 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:55
void av_buffer_pool_uninit(AVBufferPool **ppool)
Mark the pool as being available for freeing.
Definition: buffer.c:308
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
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:553
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:443
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
void * av_mallocz_array(size_t nmemb, size_t size)
Allocate a memory block for an array with av_mallocz().
Definition: mem.c:190
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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:422
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
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:523
H.264 common definitions.
@ H264_NAL_END_STREAM
Definition: h264.h:45
@ H264_NAL_DPB
Definition: h264.h:37
@ H264_NAL_END_SEQUENCE
Definition: h264.h:44
@ H264_NAL_AUXILIARY_SLICE
Definition: h264.h:53
@ H264_NAL_DPA
Definition: h264.h:36
@ H264_NAL_DPC
Definition: h264.h:38
@ H264_NAL_PPS
Definition: h264.h:42
@ H264_NAL_SPS
Definition: h264.h:41
@ H264_NAL_SLICE
Definition: h264.h:35
@ H264_NAL_FILLER_DATA
Definition: h264.h:46
@ H264_NAL_SPS_EXT
Definition: h264.h:47
@ H264_NAL_SEI
Definition: h264.h:40
@ H264_NAL_AUD
Definition: h264.h:43
@ H264_NAL_IDR_SLICE
Definition: h264.h:39
av_cold void ff_h264_decode_init_vlc(void)
Definition: h264_cavlc.c:327
void ff_h264_hl_decode_mb(const H264Context *h, H264SliceContext *sl)
Definition: h264_mb.c:799
H.264 / AVC / MPEG-4 part10 motion vector prediction.
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
int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
Definition: h264_picture.c:159
void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
Definition: h264_picture.c:44
void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
Definition: h264_picture.c:136
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:317
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:749
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:333
H.264 parameter set handling.
void ff_h264_remove_all_refs(H264Context *h)
Definition: h264_refs.c:565
const char * ff_h264_sei_stereo_mode(const H264SEIFramePacking *h)
Get stereo_mode string from the h264 frame_packing_arrangement.
Definition: h264_sei.c:493
int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, const H264ParamSets *ps, void *logctx)
Definition: h264_sei.c:413
void ff_h264_sei_uninit(H264SEIContext *h)
Reset SEI values at the beginning of the frame.
Definition: h264_sei.c:42
int ff_h264_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: h264_slice.c:296
int ff_h264_execute_decode_slices(H264Context *h)
Call decode_slice() for each context.
Definition: h264_slice.c:2797
int ff_h264_queue_decode_slice(H264Context *h, const H2645NAL *nal)
Submit a slice for decoding.
Definition: h264_slice.c:2088
H.264 / AVC / MPEG-4 part10 codec.
static const uint8_t scan8[16 *3+3]
Definition: h264dec.h:651
#define FMO
Definition: h264dec.h:63
#define H264_MAX_PICTURE_COUNT
Definition: h264dec.h:53
#define FIELD_PICTURE(h)
Definition: h264dec.h:75
static av_always_inline uint32_t pack16to32(unsigned a, unsigned b)
Definition: h264dec.h:667
#define MAX_DELAYED_PIC_COUNT
Definition: h264dec.h:57
#define PART_NOT_AVAILABLE
Definition: h264dec.h:398
for(j=16;j >0;--j)
#define HWACCEL_DXVA2(codec)
Definition: hwconfig.h:67
#define HWACCEL_VDPAU(codec)
Definition: hwconfig.h:75
#define HWACCEL_NVDEC(codec)
Definition: hwconfig.h:71
#define HWACCEL_VAAPI(codec)
Definition: hwconfig.h:73
#define HWACCEL_D3D11VA(codec)
Definition: hwconfig.h:79
#define HWACCEL_D3D11VA2(codec)
Definition: hwconfig.h:69
misc image utilities
int i
Definition: input.c:407
static const int8_t mv[256][2]
Definition: 4xm.c:78
#define DELAYED_PIC_REF
Value of Picture.reference when Picture is not a reference picture, but is held for delayed output.
Definition: diracdec.c:68
static av_cold int h264_decode_end(AVCodecContext *avctx)
Definition: h264dec.c:330
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
Definition: h264dec.c:555
const uint16_t ff_h264_mb_sizes[4]
Definition: h264dec.c:59
int ff_h264_alloc_tables(H264Context *h)
Allocate tables.
Definition: h264dec.c:181
int ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
Init context Allocate buffers which are not shared amongst multiple threads.
Definition: h264dec.c:222
static av_cold int h264_decode_init(AVCodecContext *avctx)
Definition: h264dec.c:364
static int get_last_needed_nal(H264Context *h)
Definition: h264dec.c:485
void ff_h264_free_tables(H264Context *h)
Definition: h264dec.c:138
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
static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
Definition: h264dec.c:874
void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl, int y, int height)
Definition: h264dec.c:103
static const AVOption h264_options[]
Definition: h264dec.c:1030
static int h264_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: h264dec.c:957
static int h264_export_enc_params(AVFrame *f, H264Picture *p)
Definition: h264dec.c:790
static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
Definition: h264dec.c:824
static int h264_init_context(AVCodecContext *avctx, H264Context *h)
Definition: h264dec.c:278
static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
Definition: h264dec.c:527
#define VD
Definition: h264dec.c:1029
static int is_avcc_extradata(const uint8_t *buf, int buf_size)
Definition: h264dec.c:850
static void h264_decode_flush(AVCodecContext *avctx)
Definition: h264dec.c:464
static AVOnce h264_vlc_init
Definition: h264dec.c:362
#define OFFSET(x)
Definition: h264dec.c:1028
static void idr(H264Context *h)
instantaneous decoder refresh.
Definition: h264dec.c:426
AVCodec ff_h264_decoder
Definition: h264dec.c:1045
static const AVClass h264_class
Definition: h264dec.c:1038
void ff_h264_flush_change(H264Context *h)
Definition: h264dec.c:439
static int get_consumed_bytes(int pos, int buf_size)
Return the number of bytes consumed for building the current frame.
Definition: h264dec.c:780
static int send_next_delayed_frame(H264Context *h, AVFrame *dst_frame, int *got_frame, int buf_index)
Definition: h264dec.c:924
int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
Definition: h264dec.c:61
#define FF_CODEC_CAP_ALLOCATE_PROGRESS
Definition: internal.h:76
#define FF_CODEC_CAP_EXPORTS_CROPPING
The decoder sets the cropping fields in the output frames manually.
Definition: internal.h:67
#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:41
#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:49
common internal API header
int buffer_size_t
Definition: internal.h:306
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:156
#define emms_c()
Definition: internal.h:54
#define FF_ALLOCZ_TYPED_ARRAY(p, nelem)
Definition: internal.h:103
Stereoscopic video.
#define AVOnce
Definition: thread.h:172
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:175
#define AV_ONCE_INIT
Definition: thread.h:173
const char * desc
Definition: libsvtav1.c:79
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
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
#define PICT_FRAME
Definition: mpegutils.h:39
const char data[16]
Definition: mxf.c:142
AVOptions.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
const AVProfile ff_h264_profiles[]
Definition: profiles.c:58
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
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...
useful rectangle filling function
unsigned int pos
Definition: spdifenc.c:412
Describe the class of an AVClass context structure.
Definition: log.h:67
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
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
int width
picture width / height.
Definition: avcodec.h:709
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:623
int debug
debug
Definition: avcodec.h:1623
int slice_flags
slice flags
Definition: avcodec.h:1014
int workaround_bugs
Work around bugs in encoders which sometimes cannot be detected automatically.
Definition: avcodec.h:1572
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:668
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:1680
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:1792
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:771
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1773
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:616
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:637
enum AVCodecID codec_id
Definition: avcodec.h:546
int extradata_size
Definition: avcodec.h:638
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:571
void * priv_data
Definition: avcodec.h:563
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:2006
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:1645
int is_copy
Whether the parent AVCodecContext is a copy of the context which had init() called on it.
Definition: internal.h:131
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:396
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:509
AVDictionary * metadata
metadata.
Definition: frame.h:604
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:2528
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:2514
AVOption.
Definition: opt.h:248
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
Data structure for storing block-level encoding information.
Video encoding parameters for a given frame.
int32_t delta_qp[4][2]
Quantisation parameter offset from the base (per-frame) qp for a given plane (first index) and AC/DC ...
int32_t qp
Base quantisation parameter for the frame.
ptrdiff_t mb_stride
ERPicture next_pic
int16_t * dc_val[3]
ERPicture cur_pic
uint8_t * er_temp_buffer
uint8_t * error_status_table
int * mb_index2xy
ptrdiff_t b8_stride
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)
AVCodecContext * avctx
ERPicture last_pic
const uint8_t * data
Definition: h2645_parse.h:36
int ref_idc
H.264 only, nal_ref_idc.
Definition: h2645_parse.h:70
int raw_size
Definition: h2645_parse.h:44
int size
Definition: h2645_parse.h:35
int type
NAL unit type.
Definition: h2645_parse.h:52
int size_bits
Size, in bits, of just the data, excluding the stop bit and any trailing padding.
Definition: h2645_parse.h:42
GetBitContext gb
Definition: h2645_parse.h:47
const uint8_t * raw_data
Definition: h2645_parse.h:45
H264Context.
Definition: h264dec.h:344
const PPS * pps
Definition: h264dec.h:167
int mb_stride
Definition: h264dec.h:170
int8_t * qscale_table
Definition: h264dec.h:134
int sei_recovery_frame_cnt
Definition: h264dec.h:164
AVFrame * f
Definition: h264dec.h:130
int mb_height
Definition: h264dec.h:169
int mb_width
Definition: h264dec.h:169
H264Picture * parent
Definition: h264dec.h:181
int linesize[3]
Definition: h264dec.h:175
uint8_t * data[3]
Definition: h264dec.h:174
int reference
Definition: h264dec.h:177
uint8_t percent_intra_coded_macroblocks
Definition: h264_sei.h:156
uint8_t green_metadata_type
Definition: h264_sei.h:151
uint8_t percent_six_tap_filtering
Definition: h264_sei.h:157
uint16_t num_pictures
Definition: h264_sei.h:154
uint8_t percent_alpha_point_deblocking_instance
Definition: h264_sei.h:158
uint8_t percent_non_zero_macroblocks
Definition: h264_sei.h:155
uint8_t xsd_metric_type
Definition: h264_sei.h:159
uint16_t xsd_metric_value
Definition: h264_sei.h:160
uint16_t num_seconds
Definition: h264_sei.h:153
int mb_field_decoding_flag
Definition: h264dec.h:248
int16_t * dc_val_base
Definition: h264dec.h:288
int8_t ref_cache[2][5 *8]
Definition: h264dec.h:307
ERContext er
Definition: h264dec.h:187
int bipred_scratchpad_allocated
Definition: h264dec.h:293
int16_t mv_cache[2][5 *8][2]
Motion vector cache.
Definition: h264dec.h:306
uint8_t * edge_emu_buffer
Definition: h264dec.h:291
int top_borders_allocated[2]
Definition: h264dec.h:295
uint8_t * bipred_scratchpad
Definition: h264dec.h:290
uint8_t(*[2] top_borders)[(16 *3) *2]
Definition: h264dec.h:292
H264Ref ref_list[2][48]
0..15: frame refs, 16..47: mbaff field refs.
Definition: h264dec.h:276
int mb_mbaff
mb_aff_frame && mb_field_decoding_flag
Definition: h264dec.h:249
int edge_emu_buffer_allocated
Definition: h264dec.h:294
uint8_t non_zero_count_cache[15 *8]
non zero coeff count cache.
Definition: h264dec.h:301
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264dec.h:274
int chroma_qp_index_offset[2]
Definition: h264_ps.h:122
int init_qp
pic_init_qp_minus26 + 26
Definition: h264_ps.h:120
#define avpriv_request_sample(...)
#define av_freep(p)
#define av_log(a,...)
#define src
Definition: vp8dsp.c:255
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
FILE * out
Definition: movenc.c:54
#define height
const char * b
Definition: vf_curves.c:118
if(ret< 0)
Definition: vf_mcdeint.c:282
static const uint8_t offset[127][2]
Definition: vf_spp.c:107
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.
static av_always_inline AVVideoBlockParams * av_video_enc_params_block(AVVideoEncParams *par, unsigned int idx)
@ AV_VIDEO_ENC_PARAMS_H264
H.264 stores: