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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 
172  // Set invalid values to "unspecified"
177  if (!av_color_space_name(sps->colorspace))
179  }
180  }
181 
182  /* chroma_location_info_present_flag */
183  if (get_bits1(gb)) {
184  /* chroma_sample_location_type_top_field */
185  avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
186  get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
187  }
188 
189  if (show_bits1(gb) && get_bits_left(gb) < 10) {
190  av_log(avctx, AV_LOG_WARNING, "Truncated VUI\n");
191  return 0;
192  }
193 
195  if (sps->timing_info_present_flag) {
196  unsigned num_units_in_tick = get_bits_long(gb, 32);
197  unsigned time_scale = get_bits_long(gb, 32);
198  if (!num_units_in_tick || !time_scale) {
199  av_log(avctx, AV_LOG_ERROR,
200  "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
201  time_scale, num_units_in_tick);
202  sps->timing_info_present_flag = 0;
203  } else {
204  sps->num_units_in_tick = num_units_in_tick;
205  sps->time_scale = time_scale;
206  }
207  sps->fixed_frame_rate_flag = get_bits1(gb);
208  }
209 
212  if (decode_hrd_parameters(gb, avctx, sps) < 0)
213  return AVERROR_INVALIDDATA;
216  if (decode_hrd_parameters(gb, avctx, sps) < 0)
217  return AVERROR_INVALIDDATA;
220  get_bits1(gb); /* low_delay_hrd_flag */
222  if (!get_bits_left(gb))
223  return 0;
225  if (sps->bitstream_restriction_flag) {
226  get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
227  get_ue_golomb(gb); /* max_bytes_per_pic_denom */
228  get_ue_golomb(gb); /* max_bits_per_mb_denom */
229  get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
230  get_ue_golomb(gb); /* log2_max_mv_length_vertical */
232  get_ue_golomb(gb); /*max_dec_frame_buffering*/
233 
234  if (get_bits_left(gb) < 0) {
235  sps->num_reorder_frames = 0;
237  }
238 
239  if (sps->num_reorder_frames > 16U
240  /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
241  av_log(avctx, AV_LOG_ERROR,
242  "Clipping illegal num_reorder_frames %d\n",
243  sps->num_reorder_frames);
244  sps->num_reorder_frames = 16;
245  return AVERROR_INVALIDDATA;
246  }
247  }
248 
249  return 0;
250 }
251 
252 static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
253  const uint8_t *jvt_list,
254  const uint8_t *fallback_list)
255 {
256  int i, last = 8, next = 8;
257  const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
258  if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
259  memcpy(factors, fallback_list, size * sizeof(uint8_t));
260  else
261  for (i = 0; i < size; i++) {
262  if (next) {
263  int v = get_se_golomb(gb);
264  if (v < -128 || v > 127) {
265  av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
266  return AVERROR_INVALIDDATA;
267  }
268  next = (last + v) & 0xff;
269  }
270  if (!i && !next) { /* matrix not written, we use the preset one */
271  memcpy(factors, jvt_list, size * sizeof(uint8_t));
272  break;
273  }
274  last = factors[scan[i]] = next ? next : last;
275  }
276  return 0;
277 }
278 
279 /* returns non zero if the provided SPS scaling matrix has been filled */
280 static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
281  const PPS *pps, int is_sps,
282  uint8_t(*scaling_matrix4)[16],
283  uint8_t(*scaling_matrix8)[64])
284 {
285  int fallback_sps = !is_sps && sps->scaling_matrix_present;
286  const uint8_t *fallback[4] = {
287  fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
288  fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
289  fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
290  fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
291  };
292  int ret = 0;
293  if (get_bits1(gb)) {
294  ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
295  ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
296  ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
297  ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
298  ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
299  ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
300  if (is_sps || pps->transform_8x8_mode) {
301  ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
302  ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
303  if (sps->chroma_format_idc == 3) {
304  ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
305  ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
306  ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
307  ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
308  }
309  }
310  if (!ret)
311  ret = is_sps;
312  }
313 
314  return ret;
315 }
316 
318 {
319  int i;
320 
321  for (i = 0; i < MAX_SPS_COUNT; i++)
322  av_buffer_unref(&ps->sps_list[i]);
323 
324  for (i = 0; i < MAX_PPS_COUNT; i++)
325  av_buffer_unref(&ps->pps_list[i]);
326 
327  av_buffer_unref(&ps->sps_ref);
328  av_buffer_unref(&ps->pps_ref);
329 
330  ps->pps = NULL;
331  ps->sps = NULL;
332 }
333 
335  H264ParamSets *ps, int ignore_truncation)
336 {
337  AVBufferRef *sps_buf;
338  int profile_idc, level_idc, constraint_set_flags = 0;
339  unsigned int sps_id;
340  int i, log2_max_frame_num_minus4;
341  SPS *sps;
342  int ret;
343 
344  sps_buf = av_buffer_allocz(sizeof(*sps));
345  if (!sps_buf)
346  return AVERROR(ENOMEM);
347  sps = (SPS*)sps_buf->data;
348 
349  sps->data_size = gb->buffer_end - gb->buffer;
350  if (sps->data_size > sizeof(sps->data)) {
351  av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS\n");
352  sps->data_size = sizeof(sps->data);
353  }
354  memcpy(sps->data, gb->buffer, sps->data_size);
355 
356  profile_idc = get_bits(gb, 8);
357  constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
358  constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
359  constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
360  constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
361  constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
362  constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
363  skip_bits(gb, 2); // reserved_zero_2bits
364  level_idc = get_bits(gb, 8);
365  sps_id = get_ue_golomb_31(gb);
366 
367  if (sps_id >= MAX_SPS_COUNT) {
368  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
369  goto fail;
370  }
371 
372  sps->sps_id = sps_id;
373  sps->time_offset_length = 24;
374  sps->profile_idc = profile_idc;
375  sps->constraint_set_flags = constraint_set_flags;
376  sps->level_idc = level_idc;
377  sps->full_range = -1;
378 
379  memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
380  memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
381  sps->scaling_matrix_present = 0;
382  sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
383 
384  if (sps->profile_idc == 100 || // High profile
385  sps->profile_idc == 110 || // High10 profile
386  sps->profile_idc == 122 || // High422 profile
387  sps->profile_idc == 244 || // High444 Predictive profile
388  sps->profile_idc == 44 || // Cavlc444 profile
389  sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
390  sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
391  sps->profile_idc == 118 || // Stereo High profile (MVC)
392  sps->profile_idc == 128 || // Multiview High profile (MVC)
393  sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
394  sps->profile_idc == 144) { // old High444 profile
396  if (sps->chroma_format_idc > 3U) {
397  avpriv_request_sample(avctx, "chroma_format_idc %u",
398  sps->chroma_format_idc);
399  goto fail;
400  } else if (sps->chroma_format_idc == 3) {
403  av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
404  goto fail;
405  }
406  }
407  sps->bit_depth_luma = get_ue_golomb(gb) + 8;
408  sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
409  if (sps->bit_depth_chroma != sps->bit_depth_luma) {
410  avpriv_request_sample(avctx,
411  "Different chroma and luma bit depth");
412  goto fail;
413  }
414  if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
415  sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
416  av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
417  sps->bit_depth_luma, sps->bit_depth_chroma);
418  goto fail;
419  }
420  sps->transform_bypass = get_bits1(gb);
421  ret = decode_scaling_matrices(gb, sps, NULL, 1,
422  sps->scaling_matrix4, sps->scaling_matrix8);
423  if (ret < 0)
424  goto fail;
425  sps->scaling_matrix_present |= ret;
426  } else {
427  sps->chroma_format_idc = 1;
428  sps->bit_depth_luma = 8;
429  sps->bit_depth_chroma = 8;
430  }
431 
432  log2_max_frame_num_minus4 = get_ue_golomb(gb);
433  if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
434  log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
435  av_log(avctx, AV_LOG_ERROR,
436  "log2_max_frame_num_minus4 out of range (0-12): %d\n",
437  log2_max_frame_num_minus4);
438  goto fail;
439  }
440  sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
441 
442  sps->poc_type = get_ue_golomb_31(gb);
443 
444  if (sps->poc_type == 0) { // FIXME #define
445  unsigned t = get_ue_golomb(gb);
446  if (t>12) {
447  av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
448  goto fail;
449  }
450  sps->log2_max_poc_lsb = t + 4;
451  } else if (sps->poc_type == 1) { // FIXME #define
455  sps->poc_cycle_length = get_ue_golomb(gb);
456 
457  if ((unsigned)sps->poc_cycle_length >=
459  av_log(avctx, AV_LOG_ERROR,
460  "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
461  goto fail;
462  }
463 
464  for (i = 0; i < sps->poc_cycle_length; i++)
465  sps->offset_for_ref_frame[i] = get_se_golomb(gb);
466  } else if (sps->poc_type != 2) {
467  av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
468  goto fail;
469  }
470 
472  if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
473  sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
475  av_log(avctx, AV_LOG_ERROR,
476  "too many reference frames %d\n", sps->ref_frame_count);
477  goto fail;
478  }
480  sps->mb_width = get_ue_golomb(gb) + 1;
481  sps->mb_height = get_ue_golomb(gb) + 1;
482 
483  sps->frame_mbs_only_flag = get_bits1(gb);
484 
485  if (sps->mb_height >= INT_MAX / 2U) {
486  av_log(avctx, AV_LOG_ERROR, "height overflow\n");
487  goto fail;
488  }
489  sps->mb_height *= 2 - sps->frame_mbs_only_flag;
490 
491  if (!sps->frame_mbs_only_flag)
492  sps->mb_aff = get_bits1(gb);
493  else
494  sps->mb_aff = 0;
495 
496  if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
497  (unsigned)sps->mb_height >= INT_MAX / 16 ||
498  av_image_check_size(16 * sps->mb_width,
499  16 * sps->mb_height, 0, avctx)) {
500  av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
501  goto fail;
502  }
503 
505 
506 #ifndef ALLOW_INTERLACE
507  if (sps->mb_aff)
508  av_log(avctx, AV_LOG_ERROR,
509  "MBAFF support not included; enable it at compile-time.\n");
510 #endif
511  sps->crop = get_bits1(gb);
512  if (sps->crop) {
513  unsigned int crop_left = get_ue_golomb(gb);
514  unsigned int crop_right = get_ue_golomb(gb);
515  unsigned int crop_top = get_ue_golomb(gb);
516  unsigned int crop_bottom = get_ue_golomb(gb);
517  int width = 16 * sps->mb_width;
518  int height = 16 * sps->mb_height;
519 
520  if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
521  av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
522  "values are l:%d r:%d t:%d b:%d\n",
523  crop_left, crop_right, crop_top, crop_bottom);
524 
525  sps->crop_left =
526  sps->crop_right =
527  sps->crop_top =
528  sps->crop_bottom = 0;
529  } else {
530  int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
531  int hsub = (sps->chroma_format_idc == 1 ||
532  sps->chroma_format_idc == 2) ? 1 : 0;
533  int step_x = 1 << hsub;
534  int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
535 
536  if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) &&
537  !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {
538  crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8));
539  av_log(avctx, AV_LOG_WARNING,
540  "Reducing left cropping to %d "
541  "chroma samples to preserve alignment.\n",
542  crop_left);
543  }
544 
545  if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
546  crop_right > (unsigned)INT_MAX / 4 / step_x ||
547  crop_top > (unsigned)INT_MAX / 4 / step_y ||
548  crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
549  (crop_left + crop_right ) * step_x >= width ||
550  (crop_top + crop_bottom) * step_y >= height
551  ) {
552  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);
553  goto fail;
554  }
555 
556  sps->crop_left = crop_left * step_x;
557  sps->crop_right = crop_right * step_x;
558  sps->crop_top = crop_top * step_y;
559  sps->crop_bottom = crop_bottom * step_y;
560  }
561  } else {
562  sps->crop_left =
563  sps->crop_right =
564  sps->crop_top =
565  sps->crop_bottom =
566  sps->crop = 0;
567  }
568 
570  if (sps->vui_parameters_present_flag) {
571  int ret = decode_vui_parameters(gb, avctx, sps);
572  if (ret < 0)
573  goto fail;
574  }
575 
576  if (get_bits_left(gb) < 0) {
577  av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
578  "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
579  if (!ignore_truncation)
580  goto fail;
581  }
582 
583  /* if the maximum delay is not stored in the SPS, derive it based on the
584  * level */
585  if (!sps->bitstream_restriction_flag &&
588  for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
589  if (level_max_dpb_mbs[i][0] == sps->level_idc) {
590  sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
591  sps->num_reorder_frames);
592  break;
593  }
594  }
595  }
596 
597  if (!sps->sar.den)
598  sps->sar.den = 1;
599 
600  if (avctx->debug & FF_DEBUG_PICT_INFO) {
601  static const char csp[4][5] = { "Gray", "420", "422", "444" };
602  av_log(avctx, AV_LOG_DEBUG,
603  "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",
604  sps_id, sps->profile_idc, sps->level_idc,
605  sps->poc_type,
606  sps->ref_frame_count,
607  sps->mb_width, sps->mb_height,
608  sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
609  sps->direct_8x8_inference_flag ? "8B8" : "",
610  sps->crop_left, sps->crop_right,
611  sps->crop_top, sps->crop_bottom,
612  sps->vui_parameters_present_flag ? "VUI" : "",
613  csp[sps->chroma_format_idc],
615  sps->timing_info_present_flag ? sps->time_scale : 0,
616  sps->bit_depth_luma,
618  );
619  }
620 
621  /* check if this is a repeat of an already parsed SPS, then keep the
622  * original one.
623  * otherwise drop all PPSes that depend on it */
624  if (ps->sps_list[sps_id] &&
625  !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
626  av_buffer_unref(&sps_buf);
627  } else {
628  remove_sps(ps, sps_id);
629  ps->sps_list[sps_id] = sps_buf;
630  }
631 
632  return 0;
633 
634 fail:
635  av_buffer_unref(&sps_buf);
636  return AVERROR_INVALIDDATA;
637 }
638 
639 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
640 {
641  int i, j, q, x;
642  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
643 
644  for (i = 0; i < 6; i++) {
645  pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
646  for (j = 0; j < i; j++)
647  if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
648  64 * sizeof(uint8_t))) {
649  pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
650  break;
651  }
652  if (j < i)
653  continue;
654 
655  for (q = 0; q < max_qp + 1; q++) {
656  int shift = ff_h264_quant_div6[q];
657  int idx = ff_h264_quant_rem6[q];
658  for (x = 0; x < 64; x++)
659  pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
660  ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
661  pps->scaling_matrix8[i][x]) << shift;
662  }
663  }
664 }
665 
666 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
667 {
668  int i, j, q, x;
669  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
670  for (i = 0; i < 6; i++) {
671  pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
672  for (j = 0; j < i; j++)
673  if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
674  16 * sizeof(uint8_t))) {
675  pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
676  break;
677  }
678  if (j < i)
679  continue;
680 
681  for (q = 0; q < max_qp + 1; q++) {
682  int shift = ff_h264_quant_div6[q] + 2;
683  int idx = ff_h264_quant_rem6[q];
684  for (x = 0; x < 16; x++)
685  pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
686  ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
687  pps->scaling_matrix4[i][x]) << shift;
688  }
689  }
690 }
691 
692 static void init_dequant_tables(PPS *pps, const SPS *sps)
693 {
694  int i, x;
695  init_dequant4_coeff_table(pps, sps);
696  memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
697 
698  if (pps->transform_8x8_mode)
699  init_dequant8_coeff_table(pps, sps);
700  if (sps->transform_bypass) {
701  for (i = 0; i < 6; i++)
702  for (x = 0; x < 16; x++)
703  pps->dequant4_coeff[i][0][x] = 1 << 6;
704  if (pps->transform_8x8_mode)
705  for (i = 0; i < 6; i++)
706  for (x = 0; x < 64; x++)
707  pps->dequant8_coeff[i][0][x] = 1 << 6;
708  }
709 }
710 
711 static void build_qp_table(PPS *pps, int t, int index, const int depth)
712 {
713  int i;
714  const int max_qp = 51 + 6 * (depth - 8);
715  for (i = 0; i < max_qp + 1; i++)
716  pps->chroma_qp_table[t][i] =
717  ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
718 }
719 
720 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
721 {
722  int profile_idc = sps->profile_idc;
723 
724  if ((profile_idc == 66 || profile_idc == 77 ||
725  profile_idc == 88) && (sps->constraint_set_flags & 7)) {
726  av_log(logctx, AV_LOG_VERBOSE,
727  "Current profile doesn't provide more RBSP data in PPS, skipping\n");
728  return 0;
729  }
730 
731  return 1;
732 }
733 
735  H264ParamSets *ps, int bit_length)
736 {
737  AVBufferRef *pps_buf;
738  const SPS *sps;
739  unsigned int pps_id = get_ue_golomb(gb);
740  PPS *pps;
741  int qp_bd_offset;
742  int bits_left;
743  int ret;
744 
745  if (pps_id >= MAX_PPS_COUNT) {
746  av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
747  return AVERROR_INVALIDDATA;
748  }
749 
750  pps_buf = av_buffer_allocz(sizeof(*pps));
751  if (!pps_buf)
752  return AVERROR(ENOMEM);
753  pps = (PPS*)pps_buf->data;
754 
755  pps->data_size = gb->buffer_end - gb->buffer;
756  if (pps->data_size > sizeof(pps->data)) {
757  av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "
758  "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
759  pps->data_size, sizeof(pps->data));
760  pps->data_size = sizeof(pps->data);
761  }
762  memcpy(pps->data, gb->buffer, pps->data_size);
763 
764  pps->sps_id = get_ue_golomb_31(gb);
765  if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
766  !ps->sps_list[pps->sps_id]) {
767  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
768  ret = AVERROR_INVALIDDATA;
769  goto fail;
770  }
771  sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
772  if (sps->bit_depth_luma > 14) {
773  av_log(avctx, AV_LOG_ERROR,
774  "Invalid luma bit depth=%d\n",
775  sps->bit_depth_luma);
776  ret = AVERROR_INVALIDDATA;
777  goto fail;
778  } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
780  "Unimplemented luma bit depth=%d",
781  sps->bit_depth_luma);
782  ret = AVERROR_PATCHWELCOME;
783  goto fail;
784  }
785 
786  pps->cabac = get_bits1(gb);
787  pps->pic_order_present = get_bits1(gb);
788  pps->slice_group_count = get_ue_golomb(gb) + 1;
789  if (pps->slice_group_count > 1) {
791  av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
792  }
793  pps->ref_count[0] = get_ue_golomb(gb) + 1;
794  pps->ref_count[1] = get_ue_golomb(gb) + 1;
795  if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
796  av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
797  ret = AVERROR_INVALIDDATA;
798  goto fail;
799  }
800 
801  qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
802 
803  pps->weighted_pred = get_bits1(gb);
804  pps->weighted_bipred_idc = get_bits(gb, 2);
805  pps->init_qp = get_se_golomb(gb) + 26U + qp_bd_offset;
806  pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset;
808  if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
809  ret = AVERROR_INVALIDDATA;
810  goto fail;
811  }
812 
816 
817  pps->transform_8x8_mode = 0;
818  memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
819  sizeof(pps->scaling_matrix4));
820  memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
821  sizeof(pps->scaling_matrix8));
822 
823  bits_left = bit_length - get_bits_count(gb);
824  if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
825  pps->transform_8x8_mode = get_bits1(gb);
826  ret = decode_scaling_matrices(gb, sps, pps, 0,
827  pps->scaling_matrix4, pps->scaling_matrix8);
828  if (ret < 0)
829  goto fail;
830  // second_chroma_qp_index_offset
832  if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
833  ret = AVERROR_INVALIDDATA;
834  goto fail;
835  }
836  } else {
838  }
839 
840  build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
841  sps->bit_depth_luma);
842  build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
843  sps->bit_depth_luma);
844 
845  init_dequant_tables(pps, sps);
846 
847  if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
848  pps->chroma_qp_diff = 1;
849 
850  if (avctx->debug & FF_DEBUG_PICT_INFO) {
851  av_log(avctx, AV_LOG_DEBUG,
852  "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
853  pps_id, pps->sps_id,
854  pps->cabac ? "CABAC" : "CAVLC",
855  pps->slice_group_count,
856  pps->ref_count[0], pps->ref_count[1],
857  pps->weighted_pred ? "weighted" : "",
858  pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
859  pps->deblocking_filter_parameters_present ? "LPAR" : "",
860  pps->constrained_intra_pred ? "CONSTR" : "",
861  pps->redundant_pic_cnt_present ? "REDU" : "",
862  pps->transform_8x8_mode ? "8x8DCT" : "");
863  }
864 
865  remove_pps(ps, pps_id);
866  ps->pps_list[pps_id] = pps_buf;
867 
868  return 0;
869 
870 fail:
871  av_buffer_unref(&pps_buf);
872  return ret;
873 }
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:734
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
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
const char * av_color_space_name(enum AVColorSpace space)
Definition: pixdesc.c:2664
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:2974
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:867
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:2476
#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:962
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
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1827
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:280
#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:90
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
const char * av_color_primaries_name(enum AVColorPrimaries primaries)
Definition: pixdesc.c:2652
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:639
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:252
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:720
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:2973
main external API structure.
Definition: avcodec.h:1732
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:1764
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:666
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
#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:2953
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
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
int transform_8x8_mode
transform_8x8_mode_flag
Definition: h264_ps.h:123
#define SIZE_SPECIFIER
Definition: internal.h:255
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 char * av_color_transfer_name(enum AVColorTransferCharacteristic transfer)
Definition: pixdesc.c:2658
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:317
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:334
int mb_width
pic_width_in_mbs_minus1 + 1
Definition: h264_ps.h:58
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1834
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:692
#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
enum AVCodecID id
int level_idc
Definition: h264_ps.h:46
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2951
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:711
int mb_slice_group_map_type
Definition: h264_ps.h:113
enum AVColorSpace colorspace
Definition: h264_ps.h:78