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h264dec.c
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1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... decoder
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * H.264 / AVC / MPEG-4 part10 codec.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27 
28 #define UNCHECKED_BITSTREAM_READER 1
29 
30 #include "libavutil/avassert.h"
31 #include "libavutil/display.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/stereo3d.h"
35 #include "libavutil/timer.h"
36 #include "internal.h"
37 #include "bytestream.h"
38 #include "cabac.h"
39 #include "cabac_functions.h"
40 #include "error_resilience.h"
41 #include "avcodec.h"
42 #include "h264.h"
43 #include "h264dec.h"
44 #include "h2645_parse.h"
45 #include "h264data.h"
46 #include "h264chroma.h"
47 #include "h264_mvpred.h"
48 #include "h264_ps.h"
49 #include "golomb.h"
50 #include "mathops.h"
51 #include "me_cmp.h"
52 #include "mpegutils.h"
53 #include "profiles.h"
54 #include "rectangle.h"
55 #include "thread.h"
56 #include "vdpau_compat.h"
57 
58 static int h264_decode_end(AVCodecContext *avctx);
59 
60 const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
61 
63 {
64  H264Context *h = avctx->priv_data;
65  return h && h->ps.sps ? h->ps.sps->num_reorder_frames : 0;
66 }
67 
68 static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
69  int (*mv)[2][4][2],
70  int mb_x, int mb_y, int mb_intra, int mb_skipped)
71 {
72  H264Context *h = opaque;
73  H264SliceContext *sl = &h->slice_ctx[0];
74 
75  sl->mb_x = mb_x;
76  sl->mb_y = mb_y;
77  sl->mb_xy = mb_x + mb_y * h->mb_stride;
78  memset(sl->non_zero_count_cache, 0, sizeof(sl->non_zero_count_cache));
79  av_assert1(ref >= 0);
80  /* FIXME: It is possible albeit uncommon that slice references
81  * differ between slices. We take the easy approach and ignore
82  * it for now. If this turns out to have any relevance in
83  * practice then correct remapping should be added. */
84  if (ref >= sl->ref_count[0])
85  ref = 0;
86  if (!sl->ref_list[0][ref].data[0]) {
87  av_log(h->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
88  ref = 0;
89  }
90  if ((sl->ref_list[0][ref].reference&3) != 3) {
91  av_log(h->avctx, AV_LOG_DEBUG, "Reference invalid\n");
92  return;
93  }
94  fill_rectangle(&h->cur_pic.ref_index[0][4 * sl->mb_xy],
95  2, 2, 2, ref, 1);
96  fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
97  fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
98  pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
99  sl->mb_mbaff =
100  sl->mb_field_decoding_flag = 0;
101  ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
102 }
103 
105  int y, int height)
106 {
107  AVCodecContext *avctx = h->avctx;
108  const AVFrame *src = h->cur_pic.f;
110  int vshift = desc->log2_chroma_h;
111  const int field_pic = h->picture_structure != PICT_FRAME;
112  if (field_pic) {
113  height <<= 1;
114  y <<= 1;
115  }
116 
117  height = FFMIN(height, avctx->height - y);
118 
119  if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
120  return;
121 
122  if (avctx->draw_horiz_band) {
124  int i;
125 
126  offset[0] = y * src->linesize[0];
127  offset[1] =
128  offset[2] = (y >> vshift) * src->linesize[1];
129  for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
130  offset[i] = 0;
131 
132  emms_c();
133 
134  avctx->draw_horiz_band(avctx, src, offset,
135  y, h->picture_structure, height);
136  }
137 }
138 
140 {
141  int i;
142 
145  av_freep(&h->cbp_table);
146  av_freep(&h->mvd_table[0]);
147  av_freep(&h->mvd_table[1]);
148  av_freep(&h->direct_table);
151  h->slice_table = NULL;
152  av_freep(&h->list_counts);
153 
154  av_freep(&h->mb2b_xy);
155  av_freep(&h->mb2br_xy);
156 
161 
162  for (i = 0; i < h->nb_slice_ctx; i++) {
163  H264SliceContext *sl = &h->slice_ctx[i];
164 
165  av_freep(&sl->dc_val_base);
166  av_freep(&sl->er.mb_index2xy);
168  av_freep(&sl->er.er_temp_buffer);
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  const int big_mb_num = h->mb_stride * (h->mb_height + 1);
185  const int row_mb_num = 2*h->mb_stride*FFMAX(h->nb_slice_ctx, 1);
186  int x, y;
187 
189  row_mb_num, 8 * sizeof(uint8_t), fail)
191 
193  big_mb_num * 48 * sizeof(uint8_t), fail)
195  (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
197  big_mb_num * sizeof(uint16_t), fail)
199  big_mb_num * sizeof(uint8_t), fail)
201  row_mb_num, 16 * sizeof(uint8_t), fail);
203  row_mb_num, 16 * sizeof(uint8_t), fail);
204  h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
205  h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
206 
208  4 * big_mb_num * sizeof(uint8_t), fail);
210  big_mb_num * sizeof(uint8_t), fail)
211 
212  memset(h->slice_table_base, -1,
213  (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
214  h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
215 
217  big_mb_num * sizeof(uint32_t), fail);
219  big_mb_num * sizeof(uint32_t), fail);
220  for (y = 0; y < h->mb_height; y++)
221  for (x = 0; x < h->mb_width; x++) {
222  const int mb_xy = x + y * h->mb_stride;
223  const int b_xy = 4 * x + 4 * y * h->b_stride;
224 
225  h->mb2b_xy[mb_xy] = b_xy;
226  h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
227  }
228 
229  return 0;
230 
231 fail:
233  return AVERROR(ENOMEM);
234 }
235 
236 /**
237  * Init context
238  * Allocate buffers which are not shared amongst multiple threads.
239  */
241 {
242  ERContext *er = &sl->er;
243  int mb_array_size = h->mb_height * h->mb_stride;
244  int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
245  int c_size = h->mb_stride * (h->mb_height + 1);
246  int yc_size = y_size + 2 * c_size;
247  int x, y, i;
248 
249  sl->ref_cache[0][scan8[5] + 1] =
250  sl->ref_cache[0][scan8[7] + 1] =
251  sl->ref_cache[0][scan8[13] + 1] =
252  sl->ref_cache[1][scan8[5] + 1] =
253  sl->ref_cache[1][scan8[7] + 1] =
254  sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
255 
256  if (sl != h->slice_ctx) {
257  memset(er, 0, sizeof(*er));
258  } else
259  if (CONFIG_ERROR_RESILIENCE) {
260 
261  /* init ER */
262  er->avctx = h->avctx;
264  er->opaque = h;
265  er->quarter_sample = 1;
266 
267  er->mb_num = h->mb_num;
268  er->mb_width = h->mb_width;
269  er->mb_height = h->mb_height;
270  er->mb_stride = h->mb_stride;
271  er->b8_stride = h->mb_width * 2 + 1;
272 
273  // error resilience code looks cleaner with this
275  (h->mb_num + 1) * sizeof(int), fail);
276 
277  for (y = 0; y < h->mb_height; y++)
278  for (x = 0; x < h->mb_width; x++)
279  er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
280 
281  er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
282  h->mb_stride + h->mb_width;
283 
285  mb_array_size * sizeof(uint8_t), fail);
286 
288  h->mb_height * h->mb_stride * (4*sizeof(int) + 1), fail);
289 
291  yc_size * sizeof(int16_t), fail);
292  er->dc_val[0] = sl->dc_val_base + h->mb_width * 2 + 2;
293  er->dc_val[1] = sl->dc_val_base + y_size + h->mb_stride + 1;
294  er->dc_val[2] = er->dc_val[1] + c_size;
295  for (i = 0; i < yc_size; i++)
296  sl->dc_val_base[i] = 1024;
297  }
298 
299  return 0;
300 
301 fail:
302  return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
303 }
304 
306 {
307  int i;
308 
309  h->avctx = avctx;
310  h->cur_chroma_format_idc = -1;
311 
313  h->workaround_bugs = avctx->workaround_bugs;
314  h->flags = avctx->flags;
315  h->poc.prev_poc_msb = 1 << 16;
316  h->recovery_frame = -1;
317  h->frame_recovered = 0;
318  h->poc.prev_frame_num = -1;
320  h->sei.unregistered.x264_build = -1;
321 
322  h->next_outputed_poc = INT_MIN;
323  for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
324  h->last_pocs[i] = INT_MIN;
325 
326  ff_h264_sei_uninit(&h->sei);
327 
329 
330  h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? avctx->thread_count : 1;
331  h->slice_ctx = av_mallocz_array(h->nb_slice_ctx, sizeof(*h->slice_ctx));
332  if (!h->slice_ctx) {
333  h->nb_slice_ctx = 0;
334  return AVERROR(ENOMEM);
335  }
336 
337  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
338  h->DPB[i].f = av_frame_alloc();
339  if (!h->DPB[i].f)
340  return AVERROR(ENOMEM);
341  }
342 
343  h->cur_pic.f = av_frame_alloc();
344  if (!h->cur_pic.f)
345  return AVERROR(ENOMEM);
346 
348  if (!h->last_pic_for_ec.f)
349  return AVERROR(ENOMEM);
350 
351  for (i = 0; i < h->nb_slice_ctx; i++)
352  h->slice_ctx[i].h264 = h;
353 
354  return 0;
355 }
356 
358 {
359  H264Context *h = avctx->priv_data;
360  int i;
361 
364 
365  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
366  ff_h264_unref_picture(h, &h->DPB[i]);
367  av_frame_free(&h->DPB[i].f);
368  }
369  memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
370 
371  h->cur_pic_ptr = NULL;
372 
373  av_freep(&h->slice_ctx);
374  h->nb_slice_ctx = 0;
375 
376  ff_h264_sei_uninit(&h->sei);
377  ff_h264_ps_uninit(&h->ps);
378 
380 
382  av_frame_free(&h->cur_pic.f);
385 
386  return 0;
387 }
388 
390 
392 {
393  H264Context *h = avctx->priv_data;
394  int ret;
395 
396  ret = h264_init_context(avctx, h);
397  if (ret < 0)
398  return ret;
399 
400  ret = ff_thread_once(&h264_vlc_init, ff_h264_decode_init_vlc);
401  if (ret != 0) {
402  av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
403  return AVERROR_UNKNOWN;
404  }
405 
406  if (avctx->ticks_per_frame == 1) {
407  if(h->avctx->time_base.den < INT_MAX/2) {
408  h->avctx->time_base.den *= 2;
409  } else
410  h->avctx->time_base.num /= 2;
411  }
412  avctx->ticks_per_frame = 2;
413 
414  if (avctx->extradata_size > 0 && avctx->extradata) {
416  &h->ps, &h->is_avc, &h->nal_length_size,
417  avctx->err_recognition, avctx);
418  if (ret < 0) {
419  h264_decode_end(avctx);
420  return ret;
421  }
422  }
423 
424  if (h->ps.sps && h->ps.sps->bitstream_restriction_flag &&
427  }
428 
429  avctx->internal->allocate_progress = 1;
430 
432 
433  if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
434  h->enable_er = 0;
435 
436  if (h->enable_er && (avctx->active_thread_type & FF_THREAD_SLICE)) {
437  av_log(avctx, AV_LOG_WARNING,
438  "Error resilience with slice threads is enabled. It is unsafe and unsupported and may crash. "
439  "Use it at your own risk\n");
440  }
441 
442  return 0;
443 }
444 
445 #if HAVE_THREADS
446 static int decode_init_thread_copy(AVCodecContext *avctx)
447 {
448  H264Context *h = avctx->priv_data;
449  int ret;
450 
451  if (!avctx->internal->is_copy)
452  return 0;
453 
454  memset(h, 0, sizeof(*h));
455 
456  ret = h264_init_context(avctx, h);
457  if (ret < 0)
458  return ret;
459 
460  h->context_initialized = 0;
461 
462  return 0;
463 }
464 #endif
465 
466 /**
467  * instantaneous decoder refresh.
468  */
469 static void idr(H264Context *h)
470 {
471  int i;
473  h->poc.prev_frame_num =
474  h->poc.prev_frame_num_offset = 0;
475  h->poc.prev_poc_msb = 1<<16;
476  h->poc.prev_poc_lsb = 0;
477  for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
478  h->last_pocs[i] = INT_MIN;
479 }
480 
481 /* forget old pics after a seek */
483 {
484  int i, j;
485 
486  h->next_outputed_poc = INT_MIN;
487  h->prev_interlaced_frame = 1;
488  idr(h);
489 
490  h->poc.prev_frame_num = -1;
491  if (h->cur_pic_ptr) {
492  h->cur_pic_ptr->reference = 0;
493  for (j=i=0; h->delayed_pic[i]; i++)
494  if (h->delayed_pic[i] != h->cur_pic_ptr)
495  h->delayed_pic[j++] = h->delayed_pic[i];
496  h->delayed_pic[j] = NULL;
497  }
499 
500  h->first_field = 0;
501  ff_h264_sei_uninit(&h->sei);
502  h->recovery_frame = -1;
503  h->frame_recovered = 0;
504  h->current_slice = 0;
505  h->mmco_reset = 1;
506 }
507 
508 /* forget old pics after a seek */
509 static void flush_dpb(AVCodecContext *avctx)
510 {
511  H264Context *h = avctx->priv_data;
512  int i;
513 
514  memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
515 
517 
518  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
519  ff_h264_unref_picture(h, &h->DPB[i]);
520  h->cur_pic_ptr = NULL;
522 
523  h->mb_y = 0;
524 
526  h->context_initialized = 0;
527 }
528 
529 #if FF_API_CAP_VDPAU
530 static const uint8_t start_code[] = { 0x00, 0x00, 0x01 };
531 #endif
532 
534 {
535  int nals_needed = 0;
536  int first_slice = 0;
537  int i, ret;
538 
539  for (i = 0; i < h->pkt.nb_nals; i++) {
540  H2645NAL *nal = &h->pkt.nals[i];
541  GetBitContext gb;
542 
543  /* packets can sometimes contain multiple PPS/SPS,
544  * e.g. two PAFF field pictures in one packet, or a demuxer
545  * which splits NALs strangely if so, when frame threading we
546  * can't start the next thread until we've read all of them */
547  switch (nal->type) {
548  case H264_NAL_SPS:
549  case H264_NAL_PPS:
550  nals_needed = i;
551  break;
552  case H264_NAL_DPA:
553  case H264_NAL_IDR_SLICE:
554  case H264_NAL_SLICE:
555  ret = init_get_bits8(&gb, nal->data + 1, nal->size - 1);
556  if (ret < 0) {
557  av_log(h->avctx, AV_LOG_ERROR, "Invalid zero-sized VCL NAL unit\n");
559  return ret;
560 
561  break;
562  }
563  if (!get_ue_golomb_long(&gb) || // first_mb_in_slice
564  !first_slice ||
565  first_slice != nal->type)
566  nals_needed = i;
567  if (!first_slice)
568  first_slice = nal->type;
569  }
570  }
571 
572  return nals_needed;
573 }
574 
575 static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
576 {
577  av_log(logctx, AV_LOG_DEBUG, "Green Metadata Info SEI message\n");
578  av_log(logctx, AV_LOG_DEBUG, " green_metadata_type: %d\n", gm->green_metadata_type);
579 
580  if (gm->green_metadata_type == 0) {
581  av_log(logctx, AV_LOG_DEBUG, " green_metadata_period_type: %d\n", gm->period_type);
582 
583  if (gm->period_type == 2)
584  av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_seconds: %d\n", gm->num_seconds);
585  else if (gm->period_type == 3)
586  av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_pictures: %d\n", gm->num_pictures);
587 
588  av_log(logctx, AV_LOG_DEBUG, " SEI GREEN Complexity Metrics: %f %f %f %f\n",
589  (float)gm->percent_non_zero_macroblocks/255,
590  (float)gm->percent_intra_coded_macroblocks/255,
591  (float)gm->percent_six_tap_filtering/255,
593 
594  } else if (gm->green_metadata_type == 1) {
595  av_log(logctx, AV_LOG_DEBUG, " xsd_metric_type: %d\n", gm->xsd_metric_type);
596 
597  if (gm->xsd_metric_type == 0)
598  av_log(logctx, AV_LOG_DEBUG, " xsd_metric_value: %f\n",
599  (float)gm->xsd_metric_value/100);
600  }
601 }
602 
603 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
604 {
605  AVCodecContext *const avctx = h->avctx;
606  int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
607  int idr_cleared=0;
608  int i, ret = 0;
609 
610  h->has_slice = 0;
611  h->nal_unit_type= 0;
612 
613  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
614  h->current_slice = 0;
615  if (!h->first_field)
616  h->cur_pic_ptr = NULL;
617  ff_h264_sei_uninit(&h->sei);
618  }
619 
620  if (h->nal_length_size == 4) {
621  if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
622  h->is_avc = 0;
623  }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
624  h->is_avc = 1;
625  }
626 
627  ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc,
628  h->nal_length_size, avctx->codec_id, avctx->flags2 & AV_CODEC_FLAG2_FAST);
629  if (ret < 0) {
630  av_log(avctx, AV_LOG_ERROR,
631  "Error splitting the input into NAL units.\n");
632  return ret;
633  }
634 
635  if (avctx->active_thread_type & FF_THREAD_FRAME)
636  nals_needed = get_last_needed_nal(h);
637  if (nals_needed < 0)
638  return nals_needed;
639 
640  for (i = 0; i < h->pkt.nb_nals; i++) {
641  H2645NAL *nal = &h->pkt.nals[i];
642  int max_slice_ctx, err;
643 
644  if (avctx->skip_frame >= AVDISCARD_NONREF &&
645  nal->ref_idc == 0 && nal->type != H264_NAL_SEI)
646  continue;
647 
648  // FIXME these should stop being context-global variables
649  h->nal_ref_idc = nal->ref_idc;
650  h->nal_unit_type = nal->type;
651 
652  err = 0;
653  switch (nal->type) {
654  case H264_NAL_IDR_SLICE:
655  if ((nal->data[1] & 0xFC) == 0x98) {
656  av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
657  h->next_outputed_poc = INT_MIN;
658  ret = -1;
659  goto end;
660  }
661  if(!idr_cleared) {
662  if (h->current_slice && (avctx->active_thread_type & FF_THREAD_SLICE)) {
663  av_log(h, AV_LOG_ERROR, "invalid mixed IDR / non IDR frames cannot be decoded in slice multithreading mode\n");
664  ret = AVERROR_INVALIDDATA;
665  goto end;
666  }
667  idr(h); // FIXME ensure we don't lose some frames if there is reordering
668  }
669  idr_cleared = 1;
670  h->has_recovery_point = 1;
671  case H264_NAL_SLICE:
672  h->has_slice = 1;
673 
674  if ((err = ff_h264_queue_decode_slice(h, nal))) {
676  sl->ref_count[0] = sl->ref_count[1] = 0;
677  break;
678  }
679 
680  if (h->current_slice == 1) {
681  if (avctx->active_thread_type & FF_THREAD_FRAME &&
682  i >= nals_needed && !h->setup_finished && h->cur_pic_ptr) {
683  ff_thread_finish_setup(avctx);
684  h->setup_finished = 1;
685  }
686 
687  if (h->avctx->hwaccel &&
688  (ret = h->avctx->hwaccel->start_frame(h->avctx, buf, buf_size)) < 0)
689  goto end;
690 #if FF_API_CAP_VDPAU
691  if (CONFIG_H264_VDPAU_DECODER &&
694 #endif
695  }
696 
697  max_slice_ctx = avctx->hwaccel ? 1 : h->nb_slice_ctx;
698  if (h->nb_slice_ctx_queued == max_slice_ctx) {
699  if (h->avctx->hwaccel) {
700  ret = avctx->hwaccel->decode_slice(avctx, nal->raw_data, nal->raw_size);
701  h->nb_slice_ctx_queued = 0;
702  } else
703 #if FF_API_CAP_VDPAU
704  if (CONFIG_H264_VDPAU_DECODER &&
707  start_code,
708  sizeof(start_code));
710  nal->raw_data,
711  nal->raw_size);
712  ret = 0;
713  } else
714 #endif
716  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
717  goto end;
718  }
719  break;
720  case H264_NAL_DPA:
721  case H264_NAL_DPB:
722  case H264_NAL_DPC:
723  avpriv_request_sample(avctx, "data partitioning");
724  break;
725  case H264_NAL_SEI:
726  ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
728  if (avctx->debug & FF_DEBUG_GREEN_MD)
730 #if FF_API_AFD
734 #endif /* FF_API_AFD */
735  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
736  goto end;
737  break;
738  case H264_NAL_SPS: {
739  GetBitContext tmp_gb = nal->gb;
740  if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
741  break;
743  "SPS decoding failure, trying again with the complete NAL\n");
744  init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
745  if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
746  break;
747  ff_h264_decode_seq_parameter_set(&nal->gb, avctx, &h->ps, 1);
748  break;
749  }
750  case H264_NAL_PPS:
751  ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
752  nal->size_bits);
753  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
754  goto end;
755  break;
756  case H264_NAL_AUD:
758  case H264_NAL_END_STREAM:
760  case H264_NAL_SPS_EXT:
762  break;
763  default:
764  av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
765  nal->type, nal->size_bits);
766  }
767 
768  if (err < 0) {
769  av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
770  }
771  }
772 
774  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
775  goto end;
776 
777  ret = 0;
778 end:
779 
780 #if CONFIG_ERROR_RESILIENCE
781  /*
782  * FIXME: Error handling code does not seem to support interlaced
783  * when slices span multiple rows
784  * The ff_er_add_slice calls don't work right for bottom
785  * fields; they cause massive erroneous error concealing
786  * Error marking covers both fields (top and bottom).
787  * This causes a mismatched s->error_count
788  * and a bad error table. Further, the error count goes to
789  * INT_MAX when called for bottom field, because mb_y is
790  * past end by one (callers fault) and resync_mb_y != 0
791  * causes problems for the first MB line, too.
792  */
793  if (!FIELD_PICTURE(h) && h->current_slice &&
794  h->ps.sps == (const SPS*)h->ps.sps_list[h->ps.pps->sps_id]->data &&
795  h->enable_er) {
796 
797  H264SliceContext *sl = h->slice_ctx;
798  int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
799 
801 
802  if (use_last_pic) {
804  sl->ref_list[0][0].parent = &h->last_pic_for_ec;
805  memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
806  memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
808  } else if (sl->ref_count[0]) {
809  ff_h264_set_erpic(&sl->er.last_pic, sl->ref_list[0][0].parent);
810  } else
812 
813  if (sl->ref_count[1])
814  ff_h264_set_erpic(&sl->er.next_pic, sl->ref_list[1][0].parent);
815 
816  sl->er.ref_count = sl->ref_count[0];
817 
818  ff_er_frame_end(&sl->er);
819  if (use_last_pic)
820  memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
821  }
822 #endif /* CONFIG_ERROR_RESILIENCE */
823  /* clean up */
824  if (h->cur_pic_ptr && !h->droppable && h->has_slice) {
827  }
828 
829  return (ret < 0) ? ret : buf_size;
830 }
831 
832 /**
833  * Return the number of bytes consumed for building the current frame.
834  */
835 static int get_consumed_bytes(int pos, int buf_size)
836 {
837  if (pos == 0)
838  pos = 1; // avoid infinite loops (I doubt that is needed but...)
839  if (pos + 10 > buf_size)
840  pos = buf_size; // oops ;)
841 
842  return pos;
843 }
844 
846 {
847  AVFrame *src = srcp->f;
849  int i;
850  int ret;
851 
852  if (src->format == AV_PIX_FMT_VIDEOTOOLBOX && src->buf[0]->size == 1)
853  return AVERROR_EXTERNAL;
854 
855  ret = av_frame_ref(dst, src);
856  if (ret < 0)
857  return ret;
858 
859  av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(&h->sei.frame_packing), 0);
860 
861  if (srcp->sei_recovery_frame_cnt == 0)
862  dst->key_frame = 1;
863  if (!srcp->crop)
864  return 0;
865 
866  for (i = 0; i < desc->nb_components; i++) {
867  int hshift = (i > 0) ? desc->log2_chroma_w : 0;
868  int vshift = (i > 0) ? desc->log2_chroma_h : 0;
869  int off = ((srcp->crop_left >> hshift) << h->pixel_shift) +
870  (srcp->crop_top >> vshift) * dst->linesize[i];
871  dst->data[i] += off;
872  }
873  return 0;
874 }
875 
876 static int is_extra(const uint8_t *buf, int buf_size)
877 {
878  int cnt= buf[5]&0x1f;
879  const uint8_t *p= buf+6;
880  while(cnt--){
881  int nalsize= AV_RB16(p) + 2;
882  if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
883  return 0;
884  p += nalsize;
885  }
886  cnt = *(p++);
887  if(!cnt)
888  return 0;
889  while(cnt--){
890  int nalsize= AV_RB16(p) + 2;
891  if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8)
892  return 0;
893  p += nalsize;
894  }
895  return 1;
896 }
897 
898 static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
899 {
900  int ret;
901 
904  out->recovered)) {
905 
906  if (!h->avctx->hwaccel &&
907  (out->field_poc[0] == INT_MAX ||
908  out->field_poc[1] == INT_MAX)
909  ) {
910  int p;
911  AVFrame *f = out->f;
912  int field = out->field_poc[0] == INT_MAX;
913  uint8_t *dst_data[4];
914  int linesizes[4];
915  const uint8_t *src_data[4];
916 
917  av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
918 
919  for (p = 0; p<4; p++) {
920  dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
921  src_data[p] = f->data[p] + field *f->linesize[p];
922  linesizes[p] = 2*f->linesize[p];
923  }
924 
925  av_image_copy(dst_data, linesizes, src_data, linesizes,
926  f->format, f->width, f->height>>1);
927  }
928 
929  ret = output_frame(h, dst, out);
930  if (ret < 0)
931  return ret;
932 
933  *got_frame = 1;
934 
935  if (CONFIG_MPEGVIDEO) {
937  out->mb_type,
938  out->qscale_table,
939  out->motion_val,
940  NULL,
941  h->mb_width, h->mb_height, h->mb_stride, 1);
942  }
943  }
944 
945  return 0;
946 }
947 
948 static int send_next_delayed_frame(H264Context *h, AVFrame *dst_frame,
949  int *got_frame, int buf_index)
950 {
951  int ret, i, out_idx;
952  H264Picture *out = h->delayed_pic[0];
953 
954  h->cur_pic_ptr = NULL;
955  h->first_field = 0;
956 
957  out_idx = 0;
958  for (i = 1;
959  h->delayed_pic[i] &&
960  !h->delayed_pic[i]->f->key_frame &&
961  !h->delayed_pic[i]->mmco_reset;
962  i++)
963  if (h->delayed_pic[i]->poc < out->poc) {
964  out = h->delayed_pic[i];
965  out_idx = i;
966  }
967 
968  for (i = out_idx; h->delayed_pic[i]; i++)
969  h->delayed_pic[i] = h->delayed_pic[i + 1];
970 
971  if (out) {
972  out->reference &= ~DELAYED_PIC_REF;
973  ret = finalize_frame(h, dst_frame, out, got_frame);
974  if (ret < 0)
975  return ret;
976  }
977 
978  return buf_index;
979 }
980 
981 static int h264_decode_frame(AVCodecContext *avctx, void *data,
982  int *got_frame, AVPacket *avpkt)
983 {
984  const uint8_t *buf = avpkt->data;
985  int buf_size = avpkt->size;
986  H264Context *h = avctx->priv_data;
987  AVFrame *pict = data;
988  int buf_index;
989  int ret;
990 
991  h->flags = avctx->flags;
992  h->setup_finished = 0;
993  h->nb_slice_ctx_queued = 0;
994 
996 
997  /* end of stream, output what is still in the buffers */
998  if (buf_size == 0)
999  return send_next_delayed_frame(h, pict, got_frame, 0);
1000 
1002  int side_size;
1003  uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1004  if (is_extra(side, side_size))
1005  ff_h264_decode_extradata(side, side_size,
1006  &h->ps, &h->is_avc, &h->nal_length_size,
1007  avctx->err_recognition, avctx);
1008  }
1009  if(h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC && (buf[5]&0x1F) && buf[8]==0x67){
1010  if (is_extra(buf, buf_size))
1011  return ff_h264_decode_extradata(buf, buf_size,
1012  &h->ps, &h->is_avc, &h->nal_length_size,
1013  avctx->err_recognition, avctx);
1014  }
1015 
1016  buf_index = decode_nal_units(h, buf, buf_size);
1017  if (buf_index < 0)
1018  return AVERROR_INVALIDDATA;
1019 
1020  if (!h->cur_pic_ptr && h->nal_unit_type == H264_NAL_END_SEQUENCE) {
1021  av_assert0(buf_index <= buf_size);
1022  return send_next_delayed_frame(h, pict, got_frame, buf_index);
1023  }
1024 
1025  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && (!h->cur_pic_ptr || !h->has_slice)) {
1026  if (avctx->skip_frame >= AVDISCARD_NONREF ||
1027  buf_size >= 4 && !memcmp("Q264", buf, 4))
1028  return buf_size;
1029  av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1030  return AVERROR_INVALIDDATA;
1031  }
1032 
1033  if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
1034  (h->mb_y >= h->mb_height && h->mb_height)) {
1035  if ((ret = ff_h264_field_end(h, &h->slice_ctx[0], 0)) < 0)
1036  return ret;
1037 
1038  /* Wait for second field. */
1039  if (h->next_output_pic) {
1040  ret = finalize_frame(h, pict, h->next_output_pic, got_frame);
1041  if (ret < 0)
1042  return ret;
1043  }
1044  }
1045 
1046  av_assert0(pict->buf[0] || !*got_frame);
1047 
1049 
1050  return get_consumed_bytes(buf_index, buf_size);
1051 }
1052 
1053 #define OFFSET(x) offsetof(H264Context, x)
1054 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1055 static const AVOption h264_options[] = {
1056  { "is_avc", "is avc", OFFSET(is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, 0 },
1057  { "nal_length_size", "nal_length_size", OFFSET(nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, 0 },
1058  { "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
1059  { NULL },
1060 };
1061 
1062 static const AVClass h264_class = {
1063  .class_name = "H264 Decoder",
1064  .item_name = av_default_item_name,
1065  .option = h264_options,
1066  .version = LIBAVUTIL_VERSION_INT,
1067 };
1068 
1070  .name = "h264",
1071  .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1072  .type = AVMEDIA_TYPE_VIDEO,
1073  .id = AV_CODEC_ID_H264,
1074  .priv_data_size = sizeof(H264Context),
1076  .close = h264_decode_end,
1078  .capabilities = /*AV_CODEC_CAP_DRAW_HORIZ_BAND |*/ AV_CODEC_CAP_DR1 |
1081  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
1082  .flush = flush_dpb,
1083  .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1084  .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
1086  .priv_class = &h264_class,
1087 };
1088 
1089 #if CONFIG_H264_VDPAU_DECODER && FF_API_VDPAU
1090 static const AVClass h264_vdpau_class = {
1091  .class_name = "H264 VDPAU Decoder",
1092  .item_name = av_default_item_name,
1093  .option = h264_options,
1094  .version = LIBAVUTIL_VERSION_INT,
1095 };
1096 
1097 AVCodec ff_h264_vdpau_decoder = {
1098  .name = "h264_vdpau",
1099  .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
1100  .type = AVMEDIA_TYPE_VIDEO,
1101  .id = AV_CODEC_ID_H264,
1102  .priv_data_size = sizeof(H264Context),
1104  .close = h264_decode_end,
1107  .flush = flush_dpb,
1108  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_VDPAU_H264,
1109  AV_PIX_FMT_NONE},
1111  .priv_class = &h264_vdpau_class,
1112 };
1113 #endif
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:732
struct H264Context * h264
Definition: h264dec.h:182
int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length, void *logctx, int is_nalff, int nal_length_size, enum AVCodecID codec_id, int small_padding)
Split an input packet into NAL units.
Definition: h2645_parse.c:250
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1741
int(* start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Called at the beginning of each frame or field picture.
Definition: avcodec.h:3864
int workaround_bugs
Definition: h264dec.h:371
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int sei_recovery_frame_cnt
Definition: h264dec.h:163
#define AV_NUM_DATA_POINTERS
Definition: frame.h:188
#define SLICE_FLAG_ALLOW_FIELD
allow draw_horiz_band() with field slices (MPEG-2 field pics)
Definition: avcodec.h:2277
int ff_h264_queue_decode_slice(H264Context *h, const H2645NAL *nal)
Submit a slice for decoding.
Definition: h264_slice.c:1995
H264POCContext poc
Definition: h264dec.h:458
static int send_next_delayed_frame(H264Context *h, AVFrame *dst_frame, int *got_frame, int buf_index)
Definition: h264dec.c:948
int mb_num
Definition: h264dec.h:435
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2333
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:497
This structure describes decoded (raw) audio or video data.
Definition: frame.h:187
#define FF_ALLOCZ_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)
Definition: internal.h:160
int recovery_frame_cnt
recovery_frame_cnt
Definition: h264_sei.h:110
int16_t mv_cache[2][5 *8][2]
Motion vector cache.
Definition: h264dec.h:303
AVOption.
Definition: opt.h:246
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static void flush(AVCodecContext *avctx)
int size
Definition: h2645_parse.h:35
int edge_emu_buffer_allocated
Definition: h264dec.h:291
uint16_t num_pictures
Definition: h264_sei.h:138
static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
Definition: h264dec.c:575
int first_field
Definition: h264dec.h:406
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static int init_thread_copy(AVCodecContext *avctx)
Definition: tta.c:392
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVBufferRef * sps_list[MAX_SPS_COUNT]
Definition: h264_ps.h:138
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:370
const char * desc
Definition: nvenc.c:60
hardware decoding through Videotoolbox
Definition: pixfmt.h:296
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint16_t * cbp_table
Definition: h264dec.h:411
int frame_packing_arrangement_cancel_flag
is previous arrangement canceled, -1 if never received
Definition: h264_sei.h:121
void ff_er_frame_end(ERContext *s)
Sequence parameter set.
Definition: h264_ps.h:43
int mb_y
Definition: h264dec.h:432
int bitstream_restriction_flag
Definition: h264_ps.h:84
int num
Numerator.
Definition: rational.h:59
int bipred_scratchpad_allocated
Definition: h264dec.h:290
int size
Definition: avcodec.h:1658
#define DELAYED_PIC_REF
Value of Picture.reference when Picture is not a reference picture, but is held for delayed output...
Definition: diracdec.c:66
AVBufferPool * mb_type_pool
Definition: h264dec.h:543
static void idr(H264Context *h)
instantaneous decoder refresh.
Definition: h264dec.c:469
int crop
Definition: h264dec.h:165
int16_t(*[2] motion_val)[2]
Definition: h264dec.h:136
int flags
Definition: h264dec.h:370
void ff_h264_flush_change(H264Context *h)
Definition: h264dec.c:482
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1960
int mb_height
Definition: h264dec.h:433
H264Picture * delayed_pic[MAX_DELAYED_PIC_COUNT+2]
Definition: h264dec.h:463
int is_avc
Used to parse AVC variant of H.264.
Definition: h264dec.h:448
AVBufferPool * ref_index_pool
Definition: h264dec.h:545
void ff_h264_sei_uninit(H264SEIContext *h)
Reset SEI values at the beginning of the frame.
Definition: h264_sei.c:41
ERPicture last_pic
H264Context.
Definition: h264dec.h:341
AVFrame * f
Definition: h264dec.h:129
#define AV_CODEC_FLAG2_CHUNKS
Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries...
Definition: avcodec.h:955
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
#define src
Definition: vp8dsp.c:254
AVCodec.
Definition: avcodec.h:3681
int picture_structure
Definition: h264dec.h:405
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
static void flush_dpb(AVCodecContext *avctx)
Definition: h264dec.c:509
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264dec.h:271
int size_bits
Size, in bits, of just the data, excluding the stop bit and any trailing padding. ...
Definition: h2645_parse.h:42
H264SEIGreenMetaData green_metadata
Definition: h264_sei.h:156
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1869
int ff_h264_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: h264_slice.c:292
uint8_t * chroma_pred_mode_table
Definition: h264dec.h:414
int setup_finished
Definition: h264dec.h:532
void ff_h264_remove_all_refs(H264Context *h)
Definition: h264_refs.c:563
av_cold int ff_h264_decode_init(AVCodecContext *avctx)
Definition: h264dec.c:391
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:3355
int ff_h264_execute_decode_slices(H264Context *h)
Call decode_slice() for each context.
Definition: h264_slice.c:2706
H264SEIContext sei
Definition: h264dec.h:540
int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
Definition: h264dec.c:62
const char * ff_h264_sei_stereo_mode(const H264SEIFramePacking *h)
Get stereo_mode string from the h264 frame_packing_arrangement.
Definition: h264_sei.c:457
BYTE int const BYTE * srcp
Definition: avisynth_c.h:813
struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:3052
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:1019
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static int get_consumed_bytes(int pos, int buf_size)
Return the number of bytes consumed for building the current frame.
Definition: h264dec.c:835
ptrdiff_t b8_stride
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
const PPS * pps
Definition: h264_ps.h:144
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
uint8_t
#define av_cold
Definition: attributes.h:82
uint8_t green_metadata_type
Definition: h264_sei.h:135
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:150
AVOptions.
void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
Definition: h264_picture.c:129
void ff_h264_hl_decode_mb(const H264Context *h, H264SliceContext *sl)
Definition: h264_mb.c:799
int poc
frame POC
Definition: h264dec.h:148
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
Multithreading support functions.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:388
static int get_last_needed_nal(H264Context *h)
Definition: h264dec.c:533
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1847
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
uint8_t(*[2] top_borders)[(16 *3)*2]
Definition: h264dec.h:289
void ff_h2645_packet_uninit(H2645Packet *pkt)
Free all the allocated memory in the packet.
Definition: h2645_parse.c:371
ERPicture cur_pic
int frame_recovered
Initial frame has been completely recovered.
Definition: h264dec.h:522
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:437
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
#define height
uint8_t * data
Definition: avcodec.h:1657
#define AV_CODEC_CAP_HWACCEL_VDPAU
Codec can export data for HW decoding (VDPAU).
Definition: avcodec.h:1030
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
Definition: h264dec.c:603
AVDictionary * metadata
metadata.
Definition: frame.h:465
int has_slice
slice NAL is found in the packet, set by decode_nal_units, its state does not need to be preserved ou...
Definition: h264dec.h:443
static int h264_init_context(AVCodecContext *avctx, H264Context *h)
Definition: h264dec.c:305
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
H264Picture * parent
Definition: h264dec.h:178
H264SEIAFD afd
Definition: h264_sei.h:149
high precision timer, useful to profile code
int recovered
picture at IDR or recovery point + recovery count
Definition: h264dec.h:161
#define AVOnce
Definition: thread.h:154
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2476
#define av_log(a,...)
int last_pocs[MAX_DELAYED_PIC_COUNT]
Definition: h264dec.h:464
uint16_t num_seconds
Definition: h264_sei.h:137
uint8_t percent_six_tap_filtering
Definition: h264_sei.h:141
H.264 common definitions.
void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl, int y, int height)
Definition: h264dec.c:104
H.264 parameter set handling.
H264Picture DPB[H264_MAX_PICTURE_COUNT]
Definition: h264dec.h:349
int width
width and height of the video frame
Definition: frame.h:239
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:2054
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
static const AVClass h264_class
Definition: h264dec.c:1062
int16_t * dc_val_base
Definition: h264dec.h:285
int context_initialized
Definition: h264dec.h:369
ERContext er
Definition: h264dec.h:184
int nal_unit_type
Definition: h264dec.h:441
av_default_item_name
int num_reorder_frames
Definition: h264_ps.h:85
int is_copy
Whether the parent AVCodecContext is a copy of the context which had init() called on it...
Definition: internal.h:111
#define AVERROR(e)
Definition: error.h:43
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:350
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
static const AVOption h264_options[]
Definition: h264dec.c:1055
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:3180
H2645Packet pkt
Definition: h264dec.h:358
int capabilities
Codec capabilities.
Definition: avcodec.h:3700
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
#define FIELD_PICTURE(h)
Definition: h264dec.h:74
void(* decode_mb)(void *opaque, int ref, int mv_dir, int mv_type, int(*mv)[2][4][2], int mb_x, int mb_y, int mb_intra, int mb_skipped)
uint8_t(*[2] mvd_table)[2]
Definition: h264dec.h:415
static int h264_decode_end(AVCodecContext *avctx)
Definition: h264dec.c:357
int prev_interlaced_frame
Complement sei_pic_struct SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced...
Definition: h264dec.h:496
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1827
static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
Definition: h264dec.c:898
ThreadFrame tf
Definition: h264dec.h:130
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3688
H264SEIUnregistered unregistered
Definition: h264_sei.h:151
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
uint8_t * list_counts
Array of list_count per MB specifying the slice type.
Definition: h264dec.h:408
#define FFMAX(a, b)
Definition: common.h:94
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:229
#define fail()
Definition: checkasm.h:89
uint8_t active_format_description
Definition: h264_sei.h:90
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1057
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:385
int * mb_index2xy
int raw_size
Definition: h2645_parse.h:44
uint8_t percent_non_zero_macroblocks
Definition: h264_sei.h:139
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:218
int crop_left
Definition: h264dec.h:166
uint8_t * error_status_table
uint8_t * direct_table
Definition: h264dec.h:416
int nal_length_size
Number of bytes used for nal length (1, 2 or 4)
Definition: h264dec.h:449
useful rectangle filling function
uint8_t * data[3]
Definition: h264dec.h:171
int prev_poc_msb
poc_msb of the last reference pic for POC type 0
Definition: h264_parse.h:49
void ff_vdpau_h264_picture_start(H264Context *h)
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
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:1993
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:3020
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:3172
uint32_t * mb2br_xy
Definition: h264dec.h:398
uint8_t * er_temp_buffer
#define FFMIN(a, b)
Definition: common.h:96
uint16_t * slice_table
slice_table_base + 2*mb_stride + 1
Definition: h264dec.h:401
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:68
int reference
Definition: h264dec.h:160
static int is_extra(const uint8_t *buf, int buf_size)
Definition: h264dec.c:876
static const uint8_t start_code[]
Definition: h264dec.c:530
int nb_slice_ctx
Definition: h264dec.h:355
uint32_t * mb_type
Definition: h264dec.h:139
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:3173
Context Adaptive Binary Arithmetic Coder inline functions.
H.264 / AVC / MPEG-4 part10 codec.
int mmco_reset
Definition: h264dec.h:473
H264SliceContext * slice_ctx
Definition: h264dec.h:354
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:3031
int reference
Definition: h264dec.h:174
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:1878
int top_borders_allocated[2]
Definition: h264dec.h:292
static void fill_rectangle(int x, int y, int w, int h)
Definition: ffplay.c:786
int ref_idc
H.264 only, nal_ref_idc.
Definition: h2645_parse.h:65
int type
NAL unit type.
Definition: h2645_parse.h:52
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:3161
uint8_t * edge_emu_buffer
Definition: h264dec.h:288
static unsigned get_ue_golomb_long(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to UINT32_MAX-1.
Definition: golomb.h:85
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1061
static const int8_t mv[256][2]
Definition: 4xm.c:77
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:251
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1412
int mb_stride
Definition: h264dec.h:434
AVCodecContext * avctx
Definition: h264dec.h:343
#define AV_ONCE_INIT
Definition: thread.h:155
Libavcodec external API header.
#define MAX_DELAYED_PIC_COUNT
Definition: h264dec.h:56
enum AVCodecID codec_id
Definition: avcodec.h:1749
AVCodec ff_h264_decoder
Definition: h264dec.c:1069
ERPicture next_pic
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:218
int next_outputed_poc
Definition: h264dec.h:466
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:456
int field_poc[2]
top/bottom POC
Definition: h264dec.h:147
#define AV_CODEC_FLAG2_FAST
Allow non spec compliant speedup tricks.
Definition: avcodec.h:936
int debug
debug
Definition: avcodec.h:2973
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
int recovery_frame
recovery_frame is the frame_num at which the next frame should be fully constructed.
Definition: h264dec.h:509
main external API structure.
Definition: avcodec.h:1732
uint8_t * data
The data buffer.
Definition: buffer.h:89
const uint8_t * data
Definition: h2645_parse.h:36
static AVOnce h264_vlc_init
Definition: h264dec.c:389
void * buf
Definition: avisynth_c.h:690
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: mpegvideo.c:1579
int8_t * qscale_table
Definition: h264dec.h:133
static const uint8_t scan8[16 *3+3]
Definition: h264dec.h:638
int extradata_size
Definition: avcodec.h:1848
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
H.264 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstre...
Definition: pixfmt.h:104
int slice_flags
slice flags
Definition: avcodec.h:2275
static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
Definition: h264dec.c:845
Describe the class of an AVClass context structure.
Definition: log.h:67
int prev_frame_num
frame_num of the last pic for POC type 1/2
Definition: h264_parse.h:53
uint8_t non_zero_count_cache[15 *8]
non zero coeff count cache.
Definition: h264dec.h:298
void av_buffer_pool_uninit(AVBufferPool **ppool)
Mark the pool as being available for freeing.
Definition: buffer.c:275
static av_always_inline uint32_t pack16to32(unsigned a, unsigned b)
Definition: h264dec.h:654
int8_t * ref_index[2]
Definition: h264dec.h:145
av_cold void ff_h264_decode_init_vlc(void)
Definition: h264_cavlc.c:327
int pixel_shift
0 for 8-bit H.264, 1 for high-bit-depth H.264
Definition: h264dec.h:360
int mmco_reset
MMCO_RESET set this 1.
Definition: h264dec.h:150
H264Picture * cur_pic_ptr
Definition: h264dec.h:350
#define FMO
Definition: h264dec.h:62
int mb_mbaff
mb_aff_frame && mb_field_decoding_flag
Definition: h264dec.h:246
#define FF_DEBUG_GREEN_MD
Definition: avcodec.h:3000
int enable_er
Definition: h264dec.h:538
uint8_t percent_intra_coded_macroblocks
Definition: h264_sei.h:140
const SPS * sps
Definition: h264_ps.h:145
unsigned int sps_id
Definition: h264_ps.h:109
attribute_deprecated int dtg_active_format
DTG active format information (additional aspect ratio information only used in DVB MPEG-2 transport ...
Definition: avcodec.h:2238
int allocate_progress
Whether to allocate progress for frame threading.
Definition: internal.h:126
H264SEIRecoveryPoint recovery_point
Definition: h264_sei.h:152
AVCodecContext * avctx
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
int size
Size of data in bytes.
Definition: buffer.h:93
int linesize[3]
Definition: h264dec.h:172
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:201
int prev_poc_lsb
poc_lsb of the last reference pic for POC type 0
Definition: h264_parse.h:50
uint8_t xsd_metric_type
Definition: h264_sei.h:143
int ff_h264_alloc_tables(H264Context *h)
Allocate tables.
Definition: h264dec.c:182
int has_recovery_point
Definition: h264dec.h:524
uint16_t xsd_metric_value
Definition: h264_sei.h:144
int nb_slice_ctx_queued
Definition: h264dec.h:356
discard all non reference
Definition: avcodec.h:818
int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
Definition: h264_picture.c:152
AVBufferPool * qscale_table_pool
Definition: h264dec.h:542
H264Picture * next_output_pic
Definition: h264dec.h:465
AVBufferPool * motion_val_pool
Definition: h264dec.h:544
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:83
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
#define FF_ALLOC_OR_GOTO(ctx, p, size, label)
Definition: internal.h:133
uint16_t * slice_table_base
Definition: h264dec.h:456
#define OFFSET(x)
Definition: h264dec.c:1053
H264ParamSets ps
Definition: h264dec.h:454
int16_t * dc_val[3]
H264SEIFramePacking frame_packing
Definition: h264_sei.h:154
H.264 / AVC / MPEG-4 part10 motion vector prediction.
int workaround_bugs
Work around bugs in encoders which sometimes cannot be detected automatically.
Definition: avcodec.h:2916
const AVProfile ff_h264_profiles[]
Definition: profiles.c:59
int cur_chroma_format_idc
Definition: h264dec.h:534
int8_t * intra4x4_pred_mode
Definition: h264dec.h:210
int den
Denominator.
Definition: rational.h:60
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:315
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
static int h264_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: h264dec.c:981
GetBitContext gb
Definition: h2645_parse.h:47
#define VD
Definition: h264dec.c:1054
void ff_h264_free_tables(H264Context *h)
Definition: h264dec.c:139
void * priv_data
Definition: avcodec.h:1774
const uint8_t * raw_data
Definition: h2645_parse.h:45
#define PICT_FRAME
Definition: mpegutils.h:39
int8_t ref_cache[2][5 *8]
Definition: h264dec.h:304
#define AV_CODEC_FLAG_OUTPUT_CORRUPT
Output even those frames that might be corrupted.
Definition: avcodec.h:876
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:332
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:1782
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:157
H2645NAL * nals
Definition: h2645_parse.h:70
H264Picture cur_pic
Definition: h264dec.h:351
#define PART_NOT_AVAILABLE
Definition: h264dec.h:389
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:256
int mb_width
Definition: h264dec.h:433
int current_slice
current slice number, used to initialize slice_num of each thread/context
Definition: h264dec.h:486
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1834
uint32_t * mb2b_xy
Definition: h264dec.h:397
H264Ref ref_list[2][48]
0..15: frame refs, 16..47: mbaff field refs.
Definition: h264dec.h:273
H264Picture last_pic_for_ec
Definition: h264dec.h:352
int height
Definition: frame.h:239
int crop_top
Definition: h264dec.h:167
#define AV_CODEC_FLAG2_SHOW_ALL
Show all frames before the first keyframe.
Definition: avcodec.h:964
FILE * out
Definition: movenc.c:54
uint8_t(*[2] mvd_table)[2]
Definition: h264dec.h:317
#define av_freep(p)
int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, const H264ParamSets *ps, void *logctx)
Definition: h264_sei.c:385
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Definition: ffmpeg.c:2257
int prev_frame_num_offset
for POC type 2
Definition: h264_parse.h:52
void ff_vdpau_add_data_chunk(uint8_t *data, const uint8_t *buf, int buf_size)
int8_t * intra4x4_pred_mode
Definition: h264dec.h:383
int ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
Init context Allocate buffers which are not shared amongst multiple threads.
Definition: h264dec.c:240
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3878
ptrdiff_t mb_stride
int mb_field_decoding_flag
Definition: h264dec.h:245
uint8_t(* non_zero_count)[48]
Definition: h264dec.h:386
exp golomb vlc stuff
uint8_t * bipred_scratchpad
Definition: h264dec.h:287
void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
Definition: h264_picture.c:46
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:57
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1634
int droppable
Definition: h264dec.h:366
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:994
int nal_ref_idc
Definition: h264dec.h:440
for(j=16;j >0;--j)
#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)
Definition: internal.h:142
int b_stride
Definition: h264dec.h:399
const uint16_t ff_h264_mb_sizes[4]
Definition: h264dec.c:60
Context Adaptive Binary Arithmetic Coder.
#define H264_MAX_PICTURE_COUNT
Definition: h264dec.h:52
uint8_t percent_alpha_point_deblocking_instance
Definition: h264_sei.h:142