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h264_ps.c
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1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding
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 parameter set decoding.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27 
28 #include <inttypes.h>
29 
30 #include "libavutil/imgutils.h"
31 #include "internal.h"
32 #include "mathops.h"
33 #include "avcodec.h"
34 #include "h264data.h"
35 #include "h264_ps.h"
36 #include "golomb.h"
37 
38 #define MAX_LOG2_MAX_FRAME_NUM (12 + 4)
39 #define MIN_LOG2_MAX_FRAME_NUM 4
40 
41 #define EXTENDED_SAR 255
42 
43 static const uint8_t default_scaling4[2][16] = {
44  { 6, 13, 20, 28, 13, 20, 28, 32,
45  20, 28, 32, 37, 28, 32, 37, 42 },
46  { 10, 14, 20, 24, 14, 20, 24, 27,
47  20, 24, 27, 30, 24, 27, 30, 34 }
48 };
49 
50 static const uint8_t default_scaling8[2][64] = {
51  { 6, 10, 13, 16, 18, 23, 25, 27,
52  10, 11, 16, 18, 23, 25, 27, 29,
53  13, 16, 18, 23, 25, 27, 29, 31,
54  16, 18, 23, 25, 27, 29, 31, 33,
55  18, 23, 25, 27, 29, 31, 33, 36,
56  23, 25, 27, 29, 31, 33, 36, 38,
57  25, 27, 29, 31, 33, 36, 38, 40,
58  27, 29, 31, 33, 36, 38, 40, 42 },
59  { 9, 13, 15, 17, 19, 21, 22, 24,
60  13, 13, 17, 19, 21, 22, 24, 25,
61  15, 17, 19, 21, 22, 24, 25, 27,
62  17, 19, 21, 22, 24, 25, 27, 28,
63  19, 21, 22, 24, 25, 27, 28, 30,
64  21, 22, 24, 25, 27, 28, 30, 32,
65  22, 24, 25, 27, 28, 30, 32, 33,
66  24, 25, 27, 28, 30, 32, 33, 35 }
67 };
68 
69 /* maximum number of MBs in the DPB for a given level */
70 static const int level_max_dpb_mbs[][2] = {
71  { 10, 396 },
72  { 11, 900 },
73  { 12, 2376 },
74  { 13, 2376 },
75  { 20, 2376 },
76  { 21, 4752 },
77  { 22, 8100 },
78  { 30, 8100 },
79  { 31, 18000 },
80  { 32, 20480 },
81  { 40, 32768 },
82  { 41, 32768 },
83  { 42, 34816 },
84  { 50, 110400 },
85  { 51, 184320 },
86  { 52, 184320 },
87 };
88 
89 static void remove_pps(H264ParamSets *s, int id)
90 {
91  av_buffer_unref(&s->pps_list[id]);
92 }
93 
94 static void remove_sps(H264ParamSets *s, int id)
95 {
96 #if 0
97  int i;
98  if (s->sps_list[id]) {
99  /* drop all PPS that depend on this SPS */
100  for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
101  if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
102  remove_pps(s, i);
103  }
104 #endif
105  av_buffer_unref(&s->sps_list[id]);
106 }
107 
108 static inline int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx,
109  SPS *sps)
110 {
111  int cpb_count, i;
112  cpb_count = get_ue_golomb_31(gb) + 1;
113 
114  if (cpb_count > 32U) {
115  av_log(avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
116  return AVERROR_INVALIDDATA;
117  }
118 
119  get_bits(gb, 4); /* bit_rate_scale */
120  get_bits(gb, 4); /* cpb_size_scale */
121  for (i = 0; i < cpb_count; i++) {
122  get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
123  get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
124  get_bits1(gb); /* cbr_flag */
125  }
126  sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
127  sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
128  sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
129  sps->time_offset_length = get_bits(gb, 5);
130  sps->cpb_cnt = cpb_count;
131  return 0;
132 }
133 
134 static inline int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx,
135  SPS *sps)
136 {
137  int aspect_ratio_info_present_flag;
138  unsigned int aspect_ratio_idc;
139 
140  aspect_ratio_info_present_flag = get_bits1(gb);
141 
142  if (aspect_ratio_info_present_flag) {
143  aspect_ratio_idc = get_bits(gb, 8);
144  if (aspect_ratio_idc == EXTENDED_SAR) {
145  sps->sar.num = get_bits(gb, 16);
146  sps->sar.den = get_bits(gb, 16);
147  } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
148  sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
149  } else {
150  av_log(avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
151  return AVERROR_INVALIDDATA;
152  }
153  } else {
154  sps->sar.num =
155  sps->sar.den = 0;
156  }
157 
158  if (get_bits1(gb)) /* overscan_info_present_flag */
159  get_bits1(gb); /* overscan_appropriate_flag */
160 
163  get_bits(gb, 3); /* video_format */
164  sps->full_range = get_bits1(gb); /* video_full_range_flag */
165 
168  sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
169  sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
170  sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
171  if (sps->color_primaries >= AVCOL_PRI_NB)
173  if (sps->color_trc >= AVCOL_TRC_NB)
175  if (sps->colorspace >= AVCOL_SPC_NB)
177  }
178  }
179 
180  /* chroma_location_info_present_flag */
181  if (get_bits1(gb)) {
182  /* chroma_sample_location_type_top_field */
183  avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
184  get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
185  }
186 
187  if (show_bits1(gb) && get_bits_left(gb) < 10) {
188  av_log(avctx, AV_LOG_WARNING, "Truncated VUI\n");
189  return 0;
190  }
191 
193  if (sps->timing_info_present_flag) {
194  unsigned num_units_in_tick = get_bits_long(gb, 32);
195  unsigned time_scale = get_bits_long(gb, 32);
196  if (!num_units_in_tick || !time_scale) {
197  av_log(avctx, AV_LOG_ERROR,
198  "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
199  time_scale, num_units_in_tick);
200  sps->timing_info_present_flag = 0;
201  } else {
202  sps->num_units_in_tick = num_units_in_tick;
203  sps->time_scale = time_scale;
204  }
205  sps->fixed_frame_rate_flag = get_bits1(gb);
206  }
207 
210  if (decode_hrd_parameters(gb, avctx, sps) < 0)
211  return AVERROR_INVALIDDATA;
214  if (decode_hrd_parameters(gb, avctx, sps) < 0)
215  return AVERROR_INVALIDDATA;
218  get_bits1(gb); /* low_delay_hrd_flag */
220  if (!get_bits_left(gb))
221  return 0;
223  if (sps->bitstream_restriction_flag) {
224  get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
225  get_ue_golomb(gb); /* max_bytes_per_pic_denom */
226  get_ue_golomb(gb); /* max_bits_per_mb_denom */
227  get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
228  get_ue_golomb(gb); /* log2_max_mv_length_vertical */
230  get_ue_golomb(gb); /*max_dec_frame_buffering*/
231 
232  if (get_bits_left(gb) < 0) {
233  sps->num_reorder_frames = 0;
235  }
236 
237  if (sps->num_reorder_frames > 16U
238  /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
239  av_log(avctx, AV_LOG_ERROR,
240  "Clipping illegal num_reorder_frames %d\n",
241  sps->num_reorder_frames);
242  sps->num_reorder_frames = 16;
243  return AVERROR_INVALIDDATA;
244  }
245  }
246 
247  return 0;
248 }
249 
250 static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
251  const uint8_t *jvt_list,
252  const uint8_t *fallback_list)
253 {
254  int i, last = 8, next = 8;
255  const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
256  if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
257  memcpy(factors, fallback_list, size * sizeof(uint8_t));
258  else
259  for (i = 0; i < size; i++) {
260  if (next) {
261  int v = get_se_golomb(gb);
262  if (v < -128 || v > 127) {
263  av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
264  return AVERROR_INVALIDDATA;
265  }
266  next = (last + v) & 0xff;
267  }
268  if (!i && !next) { /* matrix not written, we use the preset one */
269  memcpy(factors, jvt_list, size * sizeof(uint8_t));
270  break;
271  }
272  last = factors[scan[i]] = next ? next : last;
273  }
274  return 0;
275 }
276 
277 /* returns non zero if the provided SPS scaling matrix has been filled */
278 static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
279  const PPS *pps, int is_sps,
280  uint8_t(*scaling_matrix4)[16],
281  uint8_t(*scaling_matrix8)[64])
282 {
283  int fallback_sps = !is_sps && sps->scaling_matrix_present;
284  const uint8_t *fallback[4] = {
285  fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
286  fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
287  fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
288  fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
289  };
290  int ret = 0;
291  if (get_bits1(gb)) {
292  ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
293  ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
294  ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
295  ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
296  ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
297  ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
298  if (is_sps || pps->transform_8x8_mode) {
299  ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
300  ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
301  if (sps->chroma_format_idc == 3) {
302  ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
303  ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
304  ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
305  ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
306  }
307  }
308  if (!ret)
309  ret = is_sps;
310  }
311 
312  return ret;
313 }
314 
316 {
317  int i;
318 
319  for (i = 0; i < MAX_SPS_COUNT; i++)
320  av_buffer_unref(&ps->sps_list[i]);
321 
322  for (i = 0; i < MAX_PPS_COUNT; i++)
323  av_buffer_unref(&ps->pps_list[i]);
324 
325  av_buffer_unref(&ps->sps_ref);
326  av_buffer_unref(&ps->pps_ref);
327 
328  ps->pps = NULL;
329  ps->sps = NULL;
330 }
331 
333  H264ParamSets *ps, int ignore_truncation)
334 {
335  AVBufferRef *sps_buf;
336  int profile_idc, level_idc, constraint_set_flags = 0;
337  unsigned int sps_id;
338  int i, log2_max_frame_num_minus4;
339  SPS *sps;
340  int ret;
341 
342  sps_buf = av_buffer_allocz(sizeof(*sps));
343  if (!sps_buf)
344  return AVERROR(ENOMEM);
345  sps = (SPS*)sps_buf->data;
346 
347  sps->data_size = gb->buffer_end - gb->buffer;
348  if (sps->data_size > sizeof(sps->data)) {
349  av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS\n");
350  sps->data_size = sizeof(sps->data);
351  }
352  memcpy(sps->data, gb->buffer, sps->data_size);
353 
354  profile_idc = get_bits(gb, 8);
355  constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
356  constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
357  constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
358  constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
359  constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
360  constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
361  skip_bits(gb, 2); // reserved_zero_2bits
362  level_idc = get_bits(gb, 8);
363  sps_id = get_ue_golomb_31(gb);
364 
365  if (sps_id >= MAX_SPS_COUNT) {
366  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
367  goto fail;
368  }
369 
370  sps->sps_id = sps_id;
371  sps->time_offset_length = 24;
372  sps->profile_idc = profile_idc;
373  sps->constraint_set_flags = constraint_set_flags;
374  sps->level_idc = level_idc;
375  sps->full_range = -1;
376 
377  memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
378  memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
379  sps->scaling_matrix_present = 0;
380  sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
381 
382  if (sps->profile_idc == 100 || // High profile
383  sps->profile_idc == 110 || // High10 profile
384  sps->profile_idc == 122 || // High422 profile
385  sps->profile_idc == 244 || // High444 Predictive profile
386  sps->profile_idc == 44 || // Cavlc444 profile
387  sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
388  sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
389  sps->profile_idc == 118 || // Stereo High profile (MVC)
390  sps->profile_idc == 128 || // Multiview High profile (MVC)
391  sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
392  sps->profile_idc == 144) { // old High444 profile
394  if (sps->chroma_format_idc > 3U) {
395  avpriv_request_sample(avctx, "chroma_format_idc %u",
396  sps->chroma_format_idc);
397  goto fail;
398  } else if (sps->chroma_format_idc == 3) {
401  av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
402  goto fail;
403  }
404  }
405  sps->bit_depth_luma = get_ue_golomb(gb) + 8;
406  sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
407  if (sps->bit_depth_chroma != sps->bit_depth_luma) {
408  avpriv_request_sample(avctx,
409  "Different chroma and luma bit depth");
410  goto fail;
411  }
412  if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
413  sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
414  av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
415  sps->bit_depth_luma, sps->bit_depth_chroma);
416  goto fail;
417  }
418  sps->transform_bypass = get_bits1(gb);
419  ret = decode_scaling_matrices(gb, sps, NULL, 1,
420  sps->scaling_matrix4, sps->scaling_matrix8);
421  if (ret < 0)
422  goto fail;
423  sps->scaling_matrix_present |= ret;
424  } else {
425  sps->chroma_format_idc = 1;
426  sps->bit_depth_luma = 8;
427  sps->bit_depth_chroma = 8;
428  }
429 
430  log2_max_frame_num_minus4 = get_ue_golomb(gb);
431  if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
432  log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
433  av_log(avctx, AV_LOG_ERROR,
434  "log2_max_frame_num_minus4 out of range (0-12): %d\n",
435  log2_max_frame_num_minus4);
436  goto fail;
437  }
438  sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
439 
440  sps->poc_type = get_ue_golomb_31(gb);
441 
442  if (sps->poc_type == 0) { // FIXME #define
443  unsigned t = get_ue_golomb(gb);
444  if (t>12) {
445  av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
446  goto fail;
447  }
448  sps->log2_max_poc_lsb = t + 4;
449  } else if (sps->poc_type == 1) { // FIXME #define
453  sps->poc_cycle_length = get_ue_golomb(gb);
454 
455  if ((unsigned)sps->poc_cycle_length >=
457  av_log(avctx, AV_LOG_ERROR,
458  "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
459  goto fail;
460  }
461 
462  for (i = 0; i < sps->poc_cycle_length; i++)
463  sps->offset_for_ref_frame[i] = get_se_golomb(gb);
464  } else if (sps->poc_type != 2) {
465  av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
466  goto fail;
467  }
468 
470  if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
471  sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
473  av_log(avctx, AV_LOG_ERROR,
474  "too many reference frames %d\n", sps->ref_frame_count);
475  goto fail;
476  }
478  sps->mb_width = get_ue_golomb(gb) + 1;
479  sps->mb_height = get_ue_golomb(gb) + 1;
480 
481  sps->frame_mbs_only_flag = get_bits1(gb);
482 
483  if (sps->mb_height >= INT_MAX / 2U) {
484  av_log(avctx, AV_LOG_ERROR, "height overflow\n");
485  goto fail;
486  }
487  sps->mb_height *= 2 - sps->frame_mbs_only_flag;
488 
489  if (!sps->frame_mbs_only_flag)
490  sps->mb_aff = get_bits1(gb);
491  else
492  sps->mb_aff = 0;
493 
494  if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
495  (unsigned)sps->mb_height >= INT_MAX / 16 ||
496  av_image_check_size(16 * sps->mb_width,
497  16 * sps->mb_height, 0, avctx)) {
498  av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
499  goto fail;
500  }
501 
503 
504 #ifndef ALLOW_INTERLACE
505  if (sps->mb_aff)
506  av_log(avctx, AV_LOG_ERROR,
507  "MBAFF support not included; enable it at compile-time.\n");
508 #endif
509  sps->crop = get_bits1(gb);
510  if (sps->crop) {
511  unsigned int crop_left = get_ue_golomb(gb);
512  unsigned int crop_right = get_ue_golomb(gb);
513  unsigned int crop_top = get_ue_golomb(gb);
514  unsigned int crop_bottom = get_ue_golomb(gb);
515  int width = 16 * sps->mb_width;
516  int height = 16 * sps->mb_height;
517 
518  if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
519  av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
520  "values are l:%d r:%d t:%d b:%d\n",
521  crop_left, crop_right, crop_top, crop_bottom);
522 
523  sps->crop_left =
524  sps->crop_right =
525  sps->crop_top =
526  sps->crop_bottom = 0;
527  } else {
528  int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
529  int hsub = (sps->chroma_format_idc == 1 ||
530  sps->chroma_format_idc == 2) ? 1 : 0;
531  int step_x = 1 << hsub;
532  int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
533 
534  if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) &&
535  !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {
536  crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8));
537  av_log(avctx, AV_LOG_WARNING,
538  "Reducing left cropping to %d "
539  "chroma samples to preserve alignment.\n",
540  crop_left);
541  }
542 
543  if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
544  crop_right > (unsigned)INT_MAX / 4 / step_x ||
545  crop_top > (unsigned)INT_MAX / 4 / step_y ||
546  crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
547  (crop_left + crop_right ) * step_x >= width ||
548  (crop_top + crop_bottom) * step_y >= height
549  ) {
550  av_log(avctx, AV_LOG_ERROR, "crop values invalid %d %d %d %d / %d %d\n", crop_left, crop_right, crop_top, crop_bottom, width, height);
551  goto fail;
552  }
553 
554  sps->crop_left = crop_left * step_x;
555  sps->crop_right = crop_right * step_x;
556  sps->crop_top = crop_top * step_y;
557  sps->crop_bottom = crop_bottom * step_y;
558  }
559  } else {
560  sps->crop_left =
561  sps->crop_right =
562  sps->crop_top =
563  sps->crop_bottom =
564  sps->crop = 0;
565  }
566 
568  if (sps->vui_parameters_present_flag) {
569  int ret = decode_vui_parameters(gb, avctx, sps);
570  if (ret < 0)
571  goto fail;
572  }
573 
574  if (get_bits_left(gb) < 0) {
575  av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
576  "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
577  if (!ignore_truncation)
578  goto fail;
579  }
580 
581  /* if the maximum delay is not stored in the SPS, derive it based on the
582  * level */
583  if (!sps->bitstream_restriction_flag &&
586  for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
587  if (level_max_dpb_mbs[i][0] == sps->level_idc) {
588  sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
589  sps->num_reorder_frames);
590  break;
591  }
592  }
593  }
594 
595  if (!sps->sar.den)
596  sps->sar.den = 1;
597 
598  if (avctx->debug & FF_DEBUG_PICT_INFO) {
599  static const char csp[4][5] = { "Gray", "420", "422", "444" };
600  av_log(avctx, AV_LOG_DEBUG,
601  "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%u/%u/%u/%u %s %s %"PRId32"/%"PRId32" b%d reo:%d\n",
602  sps_id, sps->profile_idc, sps->level_idc,
603  sps->poc_type,
604  sps->ref_frame_count,
605  sps->mb_width, sps->mb_height,
606  sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
607  sps->direct_8x8_inference_flag ? "8B8" : "",
608  sps->crop_left, sps->crop_right,
609  sps->crop_top, sps->crop_bottom,
610  sps->vui_parameters_present_flag ? "VUI" : "",
611  csp[sps->chroma_format_idc],
613  sps->timing_info_present_flag ? sps->time_scale : 0,
614  sps->bit_depth_luma,
616  );
617  }
618 
619  /* check if this is a repeat of an already parsed SPS, then keep the
620  * original one.
621  * otherwise drop all PPSes that depend on it */
622  if (ps->sps_list[sps_id] &&
623  !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
624  av_buffer_unref(&sps_buf);
625  } else {
626  remove_sps(ps, sps_id);
627  ps->sps_list[sps_id] = sps_buf;
628  }
629 
630  return 0;
631 
632 fail:
633  av_buffer_unref(&sps_buf);
634  return AVERROR_INVALIDDATA;
635 }
636 
637 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
638 {
639  int i, j, q, x;
640  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
641 
642  for (i = 0; i < 6; i++) {
643  pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
644  for (j = 0; j < i; j++)
645  if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
646  64 * sizeof(uint8_t))) {
647  pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
648  break;
649  }
650  if (j < i)
651  continue;
652 
653  for (q = 0; q < max_qp + 1; q++) {
654  int shift = ff_h264_quant_div6[q];
655  int idx = ff_h264_quant_rem6[q];
656  for (x = 0; x < 64; x++)
657  pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
658  ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
659  pps->scaling_matrix8[i][x]) << shift;
660  }
661  }
662 }
663 
664 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
665 {
666  int i, j, q, x;
667  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
668  for (i = 0; i < 6; i++) {
669  pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
670  for (j = 0; j < i; j++)
671  if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
672  16 * sizeof(uint8_t))) {
673  pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
674  break;
675  }
676  if (j < i)
677  continue;
678 
679  for (q = 0; q < max_qp + 1; q++) {
680  int shift = ff_h264_quant_div6[q] + 2;
681  int idx = ff_h264_quant_rem6[q];
682  for (x = 0; x < 16; x++)
683  pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
684  ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
685  pps->scaling_matrix4[i][x]) << shift;
686  }
687  }
688 }
689 
690 static void init_dequant_tables(PPS *pps, const SPS *sps)
691 {
692  int i, x;
693  init_dequant4_coeff_table(pps, sps);
694  memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
695 
696  if (pps->transform_8x8_mode)
697  init_dequant8_coeff_table(pps, sps);
698  if (sps->transform_bypass) {
699  for (i = 0; i < 6; i++)
700  for (x = 0; x < 16; x++)
701  pps->dequant4_coeff[i][0][x] = 1 << 6;
702  if (pps->transform_8x8_mode)
703  for (i = 0; i < 6; i++)
704  for (x = 0; x < 64; x++)
705  pps->dequant8_coeff[i][0][x] = 1 << 6;
706  }
707 }
708 
709 static void build_qp_table(PPS *pps, int t, int index, const int depth)
710 {
711  int i;
712  const int max_qp = 51 + 6 * (depth - 8);
713  for (i = 0; i < max_qp + 1; i++)
714  pps->chroma_qp_table[t][i] =
715  ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
716 }
717 
718 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
719 {
720  int profile_idc = sps->profile_idc;
721 
722  if ((profile_idc == 66 || profile_idc == 77 ||
723  profile_idc == 88) && (sps->constraint_set_flags & 7)) {
724  av_log(logctx, AV_LOG_VERBOSE,
725  "Current profile doesn't provide more RBSP data in PPS, skipping\n");
726  return 0;
727  }
728 
729  return 1;
730 }
731 
733  H264ParamSets *ps, int bit_length)
734 {
735  AVBufferRef *pps_buf;
736  const SPS *sps;
737  unsigned int pps_id = get_ue_golomb(gb);
738  PPS *pps;
739  int qp_bd_offset;
740  int bits_left;
741  int ret;
742 
743  if (pps_id >= MAX_PPS_COUNT) {
744  av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
745  return AVERROR_INVALIDDATA;
746  }
747 
748  pps_buf = av_buffer_allocz(sizeof(*pps));
749  if (!pps_buf)
750  return AVERROR(ENOMEM);
751  pps = (PPS*)pps_buf->data;
752 
753  pps->data_size = gb->buffer_end - gb->buffer;
754  if (pps->data_size > sizeof(pps->data)) {
755  av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "
756  "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
757  pps->data_size, sizeof(pps->data));
758  pps->data_size = sizeof(pps->data);
759  }
760  memcpy(pps->data, gb->buffer, pps->data_size);
761 
762  pps->sps_id = get_ue_golomb_31(gb);
763  if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
764  !ps->sps_list[pps->sps_id]) {
765  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
766  ret = AVERROR_INVALIDDATA;
767  goto fail;
768  }
769  sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
770  if (sps->bit_depth_luma > 14) {
771  av_log(avctx, AV_LOG_ERROR,
772  "Invalid luma bit depth=%d\n",
773  sps->bit_depth_luma);
774  ret = AVERROR_INVALIDDATA;
775  goto fail;
776  } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
777  av_log(avctx, AV_LOG_ERROR,
778  "Unimplemented luma bit depth=%d\n",
779  sps->bit_depth_luma);
780  ret = AVERROR_PATCHWELCOME;
781  goto fail;
782  }
783 
784  pps->cabac = get_bits1(gb);
785  pps->pic_order_present = get_bits1(gb);
786  pps->slice_group_count = get_ue_golomb(gb) + 1;
787  if (pps->slice_group_count > 1) {
789  av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
790  }
791  pps->ref_count[0] = get_ue_golomb(gb) + 1;
792  pps->ref_count[1] = get_ue_golomb(gb) + 1;
793  if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
794  av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
795  ret = AVERROR_INVALIDDATA;
796  goto fail;
797  }
798 
799  qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
800 
801  pps->weighted_pred = get_bits1(gb);
802  pps->weighted_bipred_idc = get_bits(gb, 2);
803  pps->init_qp = get_se_golomb(gb) + 26 + qp_bd_offset;
804  pps->init_qs = get_se_golomb(gb) + 26 + qp_bd_offset;
806  if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
807  ret = AVERROR_INVALIDDATA;
808  goto fail;
809  }
810 
814 
815  pps->transform_8x8_mode = 0;
816  memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
817  sizeof(pps->scaling_matrix4));
818  memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
819  sizeof(pps->scaling_matrix8));
820 
821  bits_left = bit_length - get_bits_count(gb);
822  if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
823  pps->transform_8x8_mode = get_bits1(gb);
824  ret = decode_scaling_matrices(gb, sps, pps, 0,
825  pps->scaling_matrix4, pps->scaling_matrix8);
826  if (ret < 0)
827  goto fail;
828  // second_chroma_qp_index_offset
830  if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
831  ret = AVERROR_INVALIDDATA;
832  goto fail;
833  }
834  } else {
836  }
837 
838  build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
839  sps->bit_depth_luma);
840  build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
841  sps->bit_depth_luma);
842 
843  init_dequant_tables(pps, sps);
844 
845  if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
846  pps->chroma_qp_diff = 1;
847 
848  if (avctx->debug & FF_DEBUG_PICT_INFO) {
849  av_log(avctx, AV_LOG_DEBUG,
850  "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
851  pps_id, pps->sps_id,
852  pps->cabac ? "CABAC" : "CAVLC",
853  pps->slice_group_count,
854  pps->ref_count[0], pps->ref_count[1],
855  pps->weighted_pred ? "weighted" : "",
856  pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
857  pps->deblocking_filter_parameters_present ? "LPAR" : "",
858  pps->constrained_intra_pred ? "CONSTR" : "",
859  pps->redundant_pic_cnt_present ? "REDU" : "",
860  pps->transform_8x8_mode ? "8x8DCT" : "");
861  }
862 
863  remove_pps(ps, pps_id);
864  ps->pps_list[pps_id] = pps_buf;
865 
866  return 0;
867 
868 fail:
869  av_buffer_unref(&pps_buf);
870  return ret;
871 }
int chroma_format_idc
Definition: h264_ps.h:47
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:732
static unsigned int show_bits1(GetBitContext *s)
Definition: get_bits.h:333
#define MAX_LOG2_MAX_FRAME_NUM
Definition: h264_ps.c:38
int video_signal_type_present_flag
Definition: h264_ps.h:73
static void remove_pps(H264ParamSets *s, int id)
Definition: h264_ps.c:89
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx, SPS *sps)
Definition: h264_ps.c:108
static int shift(int a, int b)
Definition: sonic.c:82
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
#define MAX_SPS_COUNT
Definition: h264_ps.h:37
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:183
enum AVCodecID id
Definition: mxfenc.c:104
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:261
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int weighted_bipred_idc
Definition: h264_ps.h:116
int chroma_qp_index_offset[2]
Definition: h264_ps.h:119
AVBufferRef * sps_list[MAX_SPS_COUNT]
Definition: h264_ps.h:138
int scaling_matrix_present
Definition: h264_ps.h:86
uint8_t scaling_matrix4[6][16]
Definition: h264_ps.h:87
Sequence parameter set.
Definition: h264_ps.h:43
int bitstream_restriction_flag
Definition: h264_ps.h:84
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264_ps.h:114
int num
Numerator.
Definition: rational.h:59
const uint8_t * buffer
Definition: get_bits.h:56
Picture parameter set.
Definition: h264_ps.h:108
int frame_mbs_only_flag
Definition: h264_ps.h:61
const uint8_t ff_h264_quant_rem6[QP_MAX_NUM+1]
Definition: h264data.c:174
int chroma_qp_diff
Definition: h264_ps.h:127
uint32_t num_units_in_tick
Definition: h264_ps.h:80
int profile_idc
Definition: h264_ps.h:45
unsigned int crop_top
frame_cropping_rect_top_offset
Definition: h264_ps.h:69
int fixed_frame_rate_flag
Definition: h264_ps.h:82
uint8_t scaling_matrix4[6][16]
Definition: h264_ps.h:124
int deblocking_filter_parameters_present
deblocking_filter_parameters_present_flag
Definition: h264_ps.h:120
static const AVRational ff_h264_pixel_aspect[17]
Definition: h264data.h:51
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
const uint8_t ff_h264_dequant4_coeff_init[6][3]
Definition: h264data.c:152
const PPS * pps
Definition: h264_ps.h:144
uint8_t
int full_range
Definition: h264_ps.h:74
unsigned int crop_left
frame_cropping_rect_left_offset
Definition: h264_ps.h:67
int offset_for_non_ref_pic
Definition: h264_ps.h:53
int gaps_in_frame_num_allowed_flag
Definition: h264_ps.h:57
int bit_depth_chroma
bit_depth_chroma_minus8 + 8
Definition: h264_ps.h:98
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2959
enum AVColorPrimaries color_primaries
Definition: h264_ps.h:76
#define AV_CODEC_FLAG_UNALIGNED
Allow decoders to produce frames with data planes that are not aligned to CPU requirements (e...
Definition: avcodec.h:864
int cabac
entropy_coding_mode_flag
Definition: h264_ps.h:110
unsigned int crop_right
frame_cropping_rect_right_offset
Definition: h264_ps.h:68
uint32_t(*[6] dequant4_coeff)[16]
Definition: h264_ps.h:133
#define height
#define MAX_PPS_COUNT
Definition: h264_ps.h:38
int transform_bypass
qpprime_y_zero_transform_bypass_flag
Definition: h264_ps.h:48
uint32_t(*[6] dequant8_coeff)[64]
Definition: h264_ps.h:134
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
static const int level_max_dpb_mbs[][2]
Definition: h264_ps.c:70
int redundant_pic_cnt_present
redundant_pic_cnt_present_flag
Definition: h264_ps.h:122
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
ptrdiff_t size
Definition: opengl_enc.c:101
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2461
#define av_log(a,...)
#define U(x)
Definition: vp56_arith.h:37
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:587
H.264 parameter set handling.
int mb_aff
mb_adaptive_frame_field_flag
Definition: h264_ps.h:62
enum AVColorTransferCharacteristic color_trc
Definition: h264_ps.h:77
AVBufferRef * sps_ref
Definition: h264_ps.h:142
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AV_CODEC_FLAG2_IGNORE_CROP
Discard cropping information from SPS.
Definition: avcodec.h:959
static int get_ue_golomb(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to 8190.
Definition: golomb.h:53
int poc_type
pic_order_cnt_type
Definition: h264_ps.h:50
int constrained_intra_pred
constrained_intra_pred_flag
Definition: h264_ps.h:121
int num_reorder_frames
Definition: h264_ps.h:85
#define AVERROR(e)
Definition: error.h:43
int time_offset_length
Definition: h264_ps.h:92
const uint8_t ff_zigzag_scan[16+1]
Definition: mathtables.c:109
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
Not part of ABI.
Definition: pixfmt.h:416
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1812
int weighted_pred
weighted_pred_flag
Definition: h264_ps.h:115
static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps, const PPS *pps, int is_sps, uint8_t(*scaling_matrix4)[16], uint8_t(*scaling_matrix8)[64])
Definition: h264_ps.c:278
#define MIN_LOG2_MAX_FRAME_NUM
Definition: h264_ps.c:39
int residual_color_transform_flag
residual_colour_transform_flag
Definition: h264_ps.h:99
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:88
int delta_pic_order_always_zero_flag
Definition: h264_ps.h:52
int offset_for_top_to_bottom_field
Definition: h264_ps.h:54
int depth
Definition: v4l.c:62
static void remove_sps(H264ParamSets *s, int id)
Definition: h264_ps.c:94
static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:637
int crop
frame_cropping_flag
Definition: h264_ps.h:64
uint8_t scaling_matrix8[6][64]
Definition: h264_ps.h:125
size_t data_size
Definition: h264_ps.h:102
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:281
int ref_frame_count
num_ref_frames
Definition: h264_ps.h:56
int initial_cpb_removal_delay_length
initial_cpb_removal_delay_length_minus1 + 1
Definition: h264_ps.h:94
uint8_t data[4096]
Definition: h264_ps.h:128
#define FFMIN(a, b)
Definition: common.h:96
int poc_cycle_length
num_ref_frames_in_pic_order_cnt_cycle
Definition: h264_ps.h:55
int colour_description_present_flag
Definition: h264_ps.h:75
AVRational sar
Definition: h264_ps.h:72
#define width
uint8_t chroma_qp_table[2][QP_MAX_NUM+1]
pre-scaled (with chroma_qp_index_offset) version of qp_table
Definition: h264_ps.h:126
int init_qp
pic_init_qp_minus26 + 26
Definition: h264_ps.h:117
int direct_8x8_inference_flag
Definition: h264_ps.h:63
uint8_t scaling_matrix8[6][64]
Definition: h264_ps.h:88
static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size, const uint8_t *jvt_list, const uint8_t *fallback_list)
Definition: h264_ps.c:250
unsigned int sps_id
Definition: h264_ps.h:44
#define FF_ARRAY_ELEMS(a)
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 AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
int pic_order_present
pic_order_present_flag
Definition: h264_ps.h:111
short offset_for_ref_frame[256]
Definition: h264_ps.h:83
static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
Definition: h264_ps.c:718
static int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx, SPS *sps)
Definition: h264_ps.c:134
int timing_info_present_flag
Definition: h264_ps.h:79
int vcl_hrd_parameters_present_flag
Definition: h264_ps.h:90
Libavcodec external API header.
#define MAX_DELAYED_PIC_COUNT
Definition: h264dec.h:56
AVBufferRef * pps_list[MAX_PPS_COUNT]
Definition: h264_ps.h:139
static int get_ue_golomb_31(GetBitContext *gb)
read unsigned exp golomb code, constraint to a max of 31.
Definition: golomb.h:100
int debug
debug
Definition: avcodec.h:2958
main external API structure.
Definition: avcodec.h:1717
const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM+1]
Definition: h264data.c:203
int dpb_output_delay_length
dpb_output_delay_length_minus1 + 1
Definition: h264_ps.h:96
uint8_t * data
The data buffer.
Definition: buffer.h:89
int vui_parameters_present_flag
Definition: h264_ps.h:71
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1749
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:664
AVBufferRef * av_buffer_allocz(int size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:83
int constraint_set_flags
constraint_set[0-3]_flag
Definition: h264_ps.h:100
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:313
const uint8_t ff_h264_quant_div6[QP_MAX_NUM+1]
Definition: h264data.c:182
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:306
int index
Definition: gxfenc.c:89
Not part of ABI.
Definition: pixfmt.h:444
#define EXTENDED_SAR
Definition: h264_ps.c:41
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
#define FF_COMPLIANCE_STRICT
Strictly conform to all the things in the spec no matter what consequences.
Definition: avcodec.h:2938
const SPS * sps
Definition: h264_ps.h:145
unsigned int sps_id
Definition: h264_ps.h:109
int log2_max_poc_lsb
log2_max_pic_order_cnt_lsb_minus4
Definition: h264_ps.h:51
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:346
int size
Size of data in bytes.
Definition: buffer.h:93
uint32_t time_scale
Definition: h264_ps.h:81
int transform_8x8_mode
transform_8x8_mode_flag
Definition: h264_ps.h:123
#define SIZE_SPECIFIER
Definition: internal.h:256
int pic_struct_present_flag
Definition: h264_ps.h:91
const uint8_t ff_h264_dequant8_coeff_init[6][6]
Definition: h264data.c:165
A reference to a data buffer.
Definition: buffer.h:81
int mb_height
Definition: h264_ps.h:60
int init_qs
pic_init_qs_minus26 + 26
Definition: h264_ps.h:118
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
uint8_t data[4096]
Definition: h264_ps.h:101
AVBufferRef * pps_ref
Definition: h264_ps.h:141
int nal_hrd_parameters_present_flag
Definition: h264_ps.h:89
size_t data_size
Definition: h264_ps.h:129
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264_ps.h:49
const uint8_t * buffer_end
Definition: get_bits.h:56
static const uint8_t default_scaling4[2][16]
Definition: h264_ps.c:43
int den
Denominator.
Definition: rational.h:60
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:315
int bit_depth_luma
bit_depth_luma_minus8 + 8
Definition: h264_ps.h:97
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:332
int mb_width
pic_width_in_mbs_minus1 + 1
Definition: h264_ps.h:58
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1819
int slice_group_count
num_slice_groups_minus1 + 1
Definition: h264_ps.h:112
int cpb_cnt
See H.264 E.1.2.
Definition: h264_ps.h:93
uint32_t dequant4_buffer[6][QP_MAX_NUM+1][16]
Definition: h264_ps.h:131
static const uint8_t default_scaling8[2][64]
Definition: h264_ps.c:50
uint32_t dequant8_buffer[6][QP_MAX_NUM+1][64]
Definition: h264_ps.h:132
int cpb_removal_delay_length
cpb_removal_delay_length_minus1 + 1
Definition: h264_ps.h:95
static void init_dequant_tables(PPS *pps, const SPS *sps)
Definition: h264_ps.c:690
#define MKTAG(a, b, c, d)
Definition: common.h:342
unsigned int crop_bottom
frame_cropping_rect_bottom_offset
Definition: h264_ps.h:70
exp golomb vlc stuff
int level_idc
Definition: h264_ps.h:46
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2936
Not part of ABI.
Definition: pixfmt.h:463
const uint8_t ff_h264_dequant8_coeff_init_scan[16]
Definition: h264data.c:161
static void build_qp_table(PPS *pps, int t, int index, const int depth)
Definition: h264_ps.c:709
int mb_slice_group_map_type
Definition: h264_ps.h:113
enum AVColorSpace colorspace
Definition: h264_ps.h:78