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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 "h264.h"
35 #include "h264data.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 static const uint8_t default_scaling4[2][16] = {
42  { 6, 13, 20, 28, 13, 20, 28, 32,
43  20, 28, 32, 37, 28, 32, 37, 42 },
44  { 10, 14, 20, 24, 14, 20, 24, 27,
45  20, 24, 27, 30, 24, 27, 30, 34 }
46 };
47 
48 static const uint8_t default_scaling8[2][64] = {
49  { 6, 10, 13, 16, 18, 23, 25, 27,
50  10, 11, 16, 18, 23, 25, 27, 29,
51  13, 16, 18, 23, 25, 27, 29, 31,
52  16, 18, 23, 25, 27, 29, 31, 33,
53  18, 23, 25, 27, 29, 31, 33, 36,
54  23, 25, 27, 29, 31, 33, 36, 38,
55  25, 27, 29, 31, 33, 36, 38, 40,
56  27, 29, 31, 33, 36, 38, 40, 42 },
57  { 9, 13, 15, 17, 19, 21, 22, 24,
58  13, 13, 17, 19, 21, 22, 24, 25,
59  15, 17, 19, 21, 22, 24, 25, 27,
60  17, 19, 21, 22, 24, 25, 27, 28,
61  19, 21, 22, 24, 25, 27, 28, 30,
62  21, 22, 24, 25, 27, 28, 30, 32,
63  22, 24, 25, 27, 28, 30, 32, 33,
64  24, 25, 27, 28, 30, 32, 33, 35 }
65 };
66 
67 /* maximum number of MBs in the DPB for a given level */
68 static const int level_max_dpb_mbs[][2] = {
69  { 10, 396 },
70  { 11, 900 },
71  { 12, 2376 },
72  { 13, 2376 },
73  { 20, 2376 },
74  { 21, 4752 },
75  { 22, 8100 },
76  { 30, 8100 },
77  { 31, 18000 },
78  { 32, 20480 },
79  { 40, 32768 },
80  { 41, 32768 },
81  { 42, 34816 },
82  { 50, 110400 },
83  { 51, 184320 },
84  { 52, 184320 },
85 };
86 
87 static void remove_pps(H264ParamSets *s, int id)
88 {
89  av_buffer_unref(&s->pps_list[id]);
90 }
91 
92 static void remove_sps(H264ParamSets *s, int id)
93 {
94 #if 0
95  int i;
96  if (s->sps_list[id]) {
97  /* drop all PPS that depend on this SPS */
98  for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
99  if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
100  remove_pps(s, i);
101  }
102 #endif
103  av_buffer_unref(&s->sps_list[id]);
104 }
105 
106 static inline int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx,
107  SPS *sps)
108 {
109  int cpb_count, i;
110  cpb_count = get_ue_golomb_31(gb) + 1;
111 
112  if (cpb_count > 32U) {
113  av_log(avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
114  return AVERROR_INVALIDDATA;
115  }
116 
117  get_bits(gb, 4); /* bit_rate_scale */
118  get_bits(gb, 4); /* cpb_size_scale */
119  for (i = 0; i < cpb_count; i++) {
120  get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
121  get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
122  get_bits1(gb); /* cbr_flag */
123  }
124  sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
125  sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
126  sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
127  sps->time_offset_length = get_bits(gb, 5);
128  sps->cpb_cnt = cpb_count;
129  return 0;
130 }
131 
132 static inline int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx,
133  SPS *sps)
134 {
135  int aspect_ratio_info_present_flag;
136  unsigned int aspect_ratio_idc;
137 
138  aspect_ratio_info_present_flag = get_bits1(gb);
139 
140  if (aspect_ratio_info_present_flag) {
141  aspect_ratio_idc = get_bits(gb, 8);
142  if (aspect_ratio_idc == EXTENDED_SAR) {
143  sps->sar.num = get_bits(gb, 16);
144  sps->sar.den = get_bits(gb, 16);
145  } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
146  sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
147  } else {
148  av_log(avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
149  return AVERROR_INVALIDDATA;
150  }
151  } else {
152  sps->sar.num =
153  sps->sar.den = 0;
154  }
155 
156  if (get_bits1(gb)) /* overscan_info_present_flag */
157  get_bits1(gb); /* overscan_appropriate_flag */
158 
161  get_bits(gb, 3); /* video_format */
162  sps->full_range = get_bits1(gb); /* video_full_range_flag */
163 
166  sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
167  sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
168  sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
169  if (sps->color_primaries >= AVCOL_PRI_NB)
171  if (sps->color_trc >= AVCOL_TRC_NB)
173  if (sps->colorspace >= AVCOL_SPC_NB)
175  }
176  }
177 
178  /* chroma_location_info_present_flag */
179  if (get_bits1(gb)) {
180  /* chroma_sample_location_type_top_field */
181  avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
182  get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
183  }
184 
185  if (show_bits1(gb) && get_bits_left(gb) < 10) {
186  av_log(avctx, AV_LOG_WARNING, "Truncated VUI\n");
187  return 0;
188  }
189 
191  if (sps->timing_info_present_flag) {
192  unsigned num_units_in_tick = get_bits_long(gb, 32);
193  unsigned time_scale = get_bits_long(gb, 32);
194  if (!num_units_in_tick || !time_scale) {
195  av_log(avctx, AV_LOG_ERROR,
196  "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
197  time_scale, num_units_in_tick);
198  sps->timing_info_present_flag = 0;
199  } else {
200  sps->num_units_in_tick = num_units_in_tick;
201  sps->time_scale = time_scale;
202  }
203  sps->fixed_frame_rate_flag = get_bits1(gb);
204  }
205 
208  if (decode_hrd_parameters(gb, avctx, sps) < 0)
209  return AVERROR_INVALIDDATA;
212  if (decode_hrd_parameters(gb, avctx, sps) < 0)
213  return AVERROR_INVALIDDATA;
216  get_bits1(gb); /* low_delay_hrd_flag */
218  if (!get_bits_left(gb))
219  return 0;
221  if (sps->bitstream_restriction_flag) {
222  get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
223  get_ue_golomb(gb); /* max_bytes_per_pic_denom */
224  get_ue_golomb(gb); /* max_bits_per_mb_denom */
225  get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
226  get_ue_golomb(gb); /* log2_max_mv_length_vertical */
228  get_ue_golomb(gb); /*max_dec_frame_buffering*/
229 
230  if (get_bits_left(gb) < 0) {
231  sps->num_reorder_frames = 0;
233  }
234 
235  if (sps->num_reorder_frames > 16U
236  /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
237  av_log(avctx, AV_LOG_ERROR,
238  "Clipping illegal num_reorder_frames %d\n",
239  sps->num_reorder_frames);
240  sps->num_reorder_frames = 16;
241  return AVERROR_INVALIDDATA;
242  }
243  }
244 
245  return 0;
246 }
247 
248 static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
249  const uint8_t *jvt_list,
250  const uint8_t *fallback_list)
251 {
252  int i, last = 8, next = 8;
253  const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
254  if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
255  memcpy(factors, fallback_list, size * sizeof(uint8_t));
256  else
257  for (i = 0; i < size; i++) {
258  if (next)
259  next = (last + get_se_golomb(gb)) & 0xff;
260  if (!i && !next) { /* matrix not written, we use the preset one */
261  memcpy(factors, jvt_list, size * sizeof(uint8_t));
262  break;
263  }
264  last = factors[scan[i]] = next ? next : last;
265  }
266 }
267 
268 /* returns non zero if the provided SPS scaling matrix has been filled */
269 static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
270  const PPS *pps, int is_sps,
271  uint8_t(*scaling_matrix4)[16],
272  uint8_t(*scaling_matrix8)[64])
273 {
274  int fallback_sps = !is_sps && sps->scaling_matrix_present;
275  const uint8_t *fallback[4] = {
276  fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
277  fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
278  fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
279  fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
280  };
281  int ret = 0;
282  if (get_bits1(gb)) {
283  ret = is_sps;
284  decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
285  decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
286  decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
287  decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
288  decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
289  decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
290  if (is_sps || pps->transform_8x8_mode) {
291  decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
292  decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
293  if (sps->chroma_format_idc == 3) {
294  decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
295  decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
296  decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
297  decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
298  }
299  }
300  }
301 
302  return ret;
303 }
304 
306 {
307  int i;
308 
309  for (i = 0; i < MAX_SPS_COUNT; i++)
310  av_buffer_unref(&ps->sps_list[i]);
311 
312  for (i = 0; i < MAX_PPS_COUNT; i++)
313  av_buffer_unref(&ps->pps_list[i]);
314 
315  av_buffer_unref(&ps->sps_ref);
316  av_buffer_unref(&ps->pps_ref);
317 
318  ps->pps = NULL;
319  ps->sps = NULL;
320 }
321 
323  H264ParamSets *ps, int ignore_truncation)
324 {
325  AVBufferRef *sps_buf;
326  int profile_idc, level_idc, constraint_set_flags = 0;
327  unsigned int sps_id;
328  int i, log2_max_frame_num_minus4;
329  SPS *sps;
330 
331  sps_buf = av_buffer_allocz(sizeof(*sps));
332  if (!sps_buf)
333  return AVERROR(ENOMEM);
334  sps = (SPS*)sps_buf->data;
335 
336  sps->data_size = gb->buffer_end - gb->buffer;
337  if (sps->data_size > sizeof(sps->data)) {
338  av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS\n");
339  sps->data_size = sizeof(sps->data);
340  }
341  memcpy(sps->data, gb->buffer, sps->data_size);
342 
343  profile_idc = get_bits(gb, 8);
344  constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
345  constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
346  constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
347  constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
348  constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
349  constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
350  skip_bits(gb, 2); // reserved_zero_2bits
351  level_idc = get_bits(gb, 8);
352  sps_id = get_ue_golomb_31(gb);
353 
354  if (sps_id >= MAX_SPS_COUNT) {
355  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
356  goto fail;
357  }
358 
359  sps->sps_id = sps_id;
360  sps->time_offset_length = 24;
361  sps->profile_idc = profile_idc;
362  sps->constraint_set_flags = constraint_set_flags;
363  sps->level_idc = level_idc;
364  sps->full_range = -1;
365 
366  memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
367  memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
368  sps->scaling_matrix_present = 0;
369  sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
370 
371  if (sps->profile_idc == 100 || // High profile
372  sps->profile_idc == 110 || // High10 profile
373  sps->profile_idc == 122 || // High422 profile
374  sps->profile_idc == 244 || // High444 Predictive profile
375  sps->profile_idc == 44 || // Cavlc444 profile
376  sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
377  sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
378  sps->profile_idc == 118 || // Stereo High profile (MVC)
379  sps->profile_idc == 128 || // Multiview High profile (MVC)
380  sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
381  sps->profile_idc == 144) { // old High444 profile
383  if (sps->chroma_format_idc > 3U) {
384  avpriv_request_sample(avctx, "chroma_format_idc %u",
385  sps->chroma_format_idc);
386  goto fail;
387  } else if (sps->chroma_format_idc == 3) {
390  av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
391  goto fail;
392  }
393  }
394  sps->bit_depth_luma = get_ue_golomb(gb) + 8;
395  sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
396  if (sps->bit_depth_chroma != sps->bit_depth_luma) {
397  avpriv_request_sample(avctx,
398  "Different chroma and luma bit depth");
399  goto fail;
400  }
401  if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
402  sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
403  av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
404  sps->bit_depth_luma, sps->bit_depth_chroma);
405  goto fail;
406  }
407  sps->transform_bypass = get_bits1(gb);
409  sps->scaling_matrix4, sps->scaling_matrix8);
410  } else {
411  sps->chroma_format_idc = 1;
412  sps->bit_depth_luma = 8;
413  sps->bit_depth_chroma = 8;
414  }
415 
416  log2_max_frame_num_minus4 = get_ue_golomb(gb);
417  if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
418  log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
419  av_log(avctx, AV_LOG_ERROR,
420  "log2_max_frame_num_minus4 out of range (0-12): %d\n",
421  log2_max_frame_num_minus4);
422  goto fail;
423  }
424  sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
425 
426  sps->poc_type = get_ue_golomb_31(gb);
427 
428  if (sps->poc_type == 0) { // FIXME #define
429  unsigned t = get_ue_golomb(gb);
430  if (t>12) {
431  av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
432  goto fail;
433  }
434  sps->log2_max_poc_lsb = t + 4;
435  } else if (sps->poc_type == 1) { // FIXME #define
439  sps->poc_cycle_length = get_ue_golomb(gb);
440 
441  if ((unsigned)sps->poc_cycle_length >=
443  av_log(avctx, AV_LOG_ERROR,
444  "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
445  goto fail;
446  }
447 
448  for (i = 0; i < sps->poc_cycle_length; i++)
449  sps->offset_for_ref_frame[i] = get_se_golomb(gb);
450  } else if (sps->poc_type != 2) {
451  av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
452  goto fail;
453  }
454 
456  if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
457  sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
458  if (sps->ref_frame_count > H264_MAX_PICTURE_COUNT - 2 ||
459  sps->ref_frame_count > 16U) {
460  av_log(avctx, AV_LOG_ERROR,
461  "too many reference frames %d\n", sps->ref_frame_count);
462  goto fail;
463  }
465  sps->mb_width = get_ue_golomb(gb) + 1;
466  sps->mb_height = get_ue_golomb(gb) + 1;
467 
468  sps->frame_mbs_only_flag = get_bits1(gb);
469  if (!sps->frame_mbs_only_flag)
470  sps->mb_aff = get_bits1(gb);
471  else
472  sps->mb_aff = 0;
473 
474  if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
475  (unsigned)sps->mb_height >= INT_MAX / (16 * (2 - sps->frame_mbs_only_flag)) ||
476  av_image_check_size(16 * sps->mb_width,
477  16 * sps->mb_height * (2 - sps->frame_mbs_only_flag), 0, avctx)) {
478  av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
479  goto fail;
480  }
481 
483 
484 #ifndef ALLOW_INTERLACE
485  if (sps->mb_aff)
486  av_log(avctx, AV_LOG_ERROR,
487  "MBAFF support not included; enable it at compile-time.\n");
488 #endif
489  sps->crop = get_bits1(gb);
490  if (sps->crop) {
491  unsigned int crop_left = get_ue_golomb(gb);
492  unsigned int crop_right = get_ue_golomb(gb);
493  unsigned int crop_top = get_ue_golomb(gb);
494  unsigned int crop_bottom = get_ue_golomb(gb);
495  int width = 16 * sps->mb_width;
496  int height = 16 * sps->mb_height * (2 - sps->frame_mbs_only_flag);
497 
498  if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
499  av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
500  "values are l:%d r:%d t:%d b:%d\n",
501  crop_left, crop_right, crop_top, crop_bottom);
502 
503  sps->crop_left =
504  sps->crop_right =
505  sps->crop_top =
506  sps->crop_bottom = 0;
507  } else {
508  int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
509  int hsub = (sps->chroma_format_idc == 1 ||
510  sps->chroma_format_idc == 2) ? 1 : 0;
511  int step_x = 1 << hsub;
512  int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
513 
514  if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) &&
515  !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {
516  crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8));
517  av_log(avctx, AV_LOG_WARNING,
518  "Reducing left cropping to %d "
519  "chroma samples to preserve alignment.\n",
520  crop_left);
521  }
522 
523  if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
524  crop_right > (unsigned)INT_MAX / 4 / step_x ||
525  crop_top > (unsigned)INT_MAX / 4 / step_y ||
526  crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
527  (crop_left + crop_right ) * step_x >= width ||
528  (crop_top + crop_bottom) * step_y >= height
529  ) {
530  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);
531  goto fail;
532  }
533 
534  sps->crop_left = crop_left * step_x;
535  sps->crop_right = crop_right * step_x;
536  sps->crop_top = crop_top * step_y;
537  sps->crop_bottom = crop_bottom * step_y;
538  }
539  } else {
540  sps->crop_left =
541  sps->crop_right =
542  sps->crop_top =
543  sps->crop_bottom =
544  sps->crop = 0;
545  }
546 
548  if (sps->vui_parameters_present_flag) {
549  int ret = decode_vui_parameters(gb, avctx, sps);
550  if (ret < 0)
551  goto fail;
552  }
553 
554  if (get_bits_left(gb) < 0) {
555  av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
556  "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
557  if (!ignore_truncation)
558  goto fail;
559  }
560 
561  /* if the maximum delay is not stored in the SPS, derive it based on the
562  * level */
563  if (!sps->bitstream_restriction_flag &&
566  for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
567  if (level_max_dpb_mbs[i][0] == sps->level_idc) {
568  sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
569  sps->num_reorder_frames);
570  break;
571  }
572  }
573  }
574 
575  if (!sps->sar.den)
576  sps->sar.den = 1;
577 
578  if (avctx->debug & FF_DEBUG_PICT_INFO) {
579  static const char csp[4][5] = { "Gray", "420", "422", "444" };
580  av_log(avctx, AV_LOG_DEBUG,
581  "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",
582  sps_id, sps->profile_idc, sps->level_idc,
583  sps->poc_type,
584  sps->ref_frame_count,
585  sps->mb_width, sps->mb_height,
586  sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
587  sps->direct_8x8_inference_flag ? "8B8" : "",
588  sps->crop_left, sps->crop_right,
589  sps->crop_top, sps->crop_bottom,
590  sps->vui_parameters_present_flag ? "VUI" : "",
591  csp[sps->chroma_format_idc],
593  sps->timing_info_present_flag ? sps->time_scale : 0,
594  sps->bit_depth_luma,
596  );
597  }
598 
599  /* check if this is a repeat of an already parsed SPS, then keep the
600  * original one.
601  * otherwise drop all PPSes that depend on it */
602  if (ps->sps_list[sps_id] &&
603  !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
604  av_buffer_unref(&sps_buf);
605  } else {
606  remove_sps(ps, sps_id);
607  ps->sps_list[sps_id] = sps_buf;
608  }
609 
610  return 0;
611 
612 fail:
613  av_buffer_unref(&sps_buf);
614  return AVERROR_INVALIDDATA;
615 }
616 
617 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
618 {
619  int i, j, q, x;
620  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
621 
622  for (i = 0; i < 6; i++) {
623  pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
624  for (j = 0; j < i; j++)
625  if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
626  64 * sizeof(uint8_t))) {
627  pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
628  break;
629  }
630  if (j < i)
631  continue;
632 
633  for (q = 0; q < max_qp + 1; q++) {
634  int shift = ff_h264_quant_div6[q];
635  int idx = ff_h264_quant_rem6[q];
636  for (x = 0; x < 64; x++)
637  pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
638  ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
639  pps->scaling_matrix8[i][x]) << shift;
640  }
641  }
642 }
643 
644 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
645 {
646  int i, j, q, x;
647  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
648  for (i = 0; i < 6; i++) {
649  pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
650  for (j = 0; j < i; j++)
651  if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
652  16 * sizeof(uint8_t))) {
653  pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
654  break;
655  }
656  if (j < i)
657  continue;
658 
659  for (q = 0; q < max_qp + 1; q++) {
660  int shift = ff_h264_quant_div6[q] + 2;
661  int idx = ff_h264_quant_rem6[q];
662  for (x = 0; x < 16; x++)
663  pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
664  ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
665  pps->scaling_matrix4[i][x]) << shift;
666  }
667  }
668 }
669 
670 static void init_dequant_tables(PPS *pps, const SPS *sps)
671 {
672  int i, x;
673  init_dequant4_coeff_table(pps, sps);
674  memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
675 
676  if (pps->transform_8x8_mode)
677  init_dequant8_coeff_table(pps, sps);
678  if (sps->transform_bypass) {
679  for (i = 0; i < 6; i++)
680  for (x = 0; x < 16; x++)
681  pps->dequant4_coeff[i][0][x] = 1 << 6;
682  if (pps->transform_8x8_mode)
683  for (i = 0; i < 6; i++)
684  for (x = 0; x < 64; x++)
685  pps->dequant8_coeff[i][0][x] = 1 << 6;
686  }
687 }
688 
689 static void build_qp_table(PPS *pps, int t, int index, const int depth)
690 {
691  int i;
692  const int max_qp = 51 + 6 * (depth - 8);
693  for (i = 0; i < max_qp + 1; i++)
694  pps->chroma_qp_table[t][i] =
695  ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
696 }
697 
698 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
699 {
700  int profile_idc = sps->profile_idc;
701 
702  if ((profile_idc == 66 || profile_idc == 77 ||
703  profile_idc == 88) && (sps->constraint_set_flags & 7)) {
704  av_log(logctx, AV_LOG_VERBOSE,
705  "Current profile doesn't provide more RBSP data in PPS, skipping\n");
706  return 0;
707  }
708 
709  return 1;
710 }
711 
713  H264ParamSets *ps, int bit_length)
714 {
715  AVBufferRef *pps_buf;
716  const SPS *sps;
717  unsigned int pps_id = get_ue_golomb(gb);
718  PPS *pps;
719  int qp_bd_offset;
720  int bits_left;
721  int ret;
722 
723  if (pps_id >= MAX_PPS_COUNT) {
724  av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
725  return AVERROR_INVALIDDATA;
726  }
727 
728  pps_buf = av_buffer_allocz(sizeof(*pps));
729  if (!pps_buf)
730  return AVERROR(ENOMEM);
731  pps = (PPS*)pps_buf->data;
732 
733  pps->data_size = gb->buffer_end - gb->buffer;
734  if (pps->data_size > sizeof(pps->data)) {
735  av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "
736  "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
737  pps->data_size, sizeof(pps->data));
738  pps->data_size = sizeof(pps->data);
739  }
740  memcpy(pps->data, gb->buffer, pps->data_size);
741 
742  pps->sps_id = get_ue_golomb_31(gb);
743  if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
744  !ps->sps_list[pps->sps_id]) {
745  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
746  ret = AVERROR_INVALIDDATA;
747  goto fail;
748  }
749  sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
750  if (sps->bit_depth_luma > 14) {
751  av_log(avctx, AV_LOG_ERROR,
752  "Invalid luma bit depth=%d\n",
753  sps->bit_depth_luma);
754  ret = AVERROR_INVALIDDATA;
755  goto fail;
756  } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
757  av_log(avctx, AV_LOG_ERROR,
758  "Unimplemented luma bit depth=%d\n",
759  sps->bit_depth_luma);
760  ret = AVERROR_PATCHWELCOME;
761  goto fail;
762  }
763 
764  pps->cabac = get_bits1(gb);
765  pps->pic_order_present = get_bits1(gb);
766  pps->slice_group_count = get_ue_golomb(gb) + 1;
767  if (pps->slice_group_count > 1) {
769  av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
770  switch (pps->mb_slice_group_map_type) {
771  case 0:
772 #if 0
773  | for (i = 0; i <= num_slice_groups_minus1; i++) | | |
774  | run_length[i] |1 |ue(v) |
775 #endif
776  break;
777  case 2:
778 #if 0
779  | for (i = 0; i < num_slice_groups_minus1; i++) { | | |
780  | top_left_mb[i] |1 |ue(v) |
781  | bottom_right_mb[i] |1 |ue(v) |
782  | } | | |
783 #endif
784  break;
785  case 3:
786  case 4:
787  case 5:
788 #if 0
789  | slice_group_change_direction_flag |1 |u(1) |
790  | slice_group_change_rate_minus1 |1 |ue(v) |
791 #endif
792  break;
793  case 6:
794 #if 0
795  | slice_group_id_cnt_minus1 |1 |ue(v) |
796  | for (i = 0; i <= slice_group_id_cnt_minus1; i++)| | |
797  | slice_group_id[i] |1 |u(v) |
798 #endif
799  break;
800  }
801  }
802  pps->ref_count[0] = get_ue_golomb(gb) + 1;
803  pps->ref_count[1] = get_ue_golomb(gb) + 1;
804  if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
805  av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
806  ret = AVERROR_INVALIDDATA;
807  goto fail;
808  }
809 
810  qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
811 
812  pps->weighted_pred = get_bits1(gb);
813  pps->weighted_bipred_idc = get_bits(gb, 2);
814  pps->init_qp = get_se_golomb(gb) + 26 + qp_bd_offset;
815  pps->init_qs = get_se_golomb(gb) + 26 + qp_bd_offset;
820 
821  pps->transform_8x8_mode = 0;
822  memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
823  sizeof(pps->scaling_matrix4));
824  memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
825  sizeof(pps->scaling_matrix8));
826 
827  bits_left = bit_length - get_bits_count(gb);
828  if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
829  pps->transform_8x8_mode = get_bits1(gb);
830  decode_scaling_matrices(gb, sps, pps, 0,
831  pps->scaling_matrix4, pps->scaling_matrix8);
832  // second_chroma_qp_index_offset
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.h:140
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:712
static unsigned int show_bits1(GetBitContext *s)
Definition: get_bits.h:319
#define MAX_LOG2_MAX_FRAME_NUM
Definition: h264_ps.c:38
int video_signal_type_present_flag
Definition: h264.h:165
static void remove_pps(H264ParamSets *s, int id)
Definition: h264_ps.c:87
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
#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:106
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:124
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:183
enum AVCodecID id
Definition: mxfenc.c:104
#define H264_MAX_PICTURE_COUNT
Definition: h264.h:51
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:247
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int weighted_bipred_idc
Definition: h264.h:208
int chroma_qp_index_offset[2]
Definition: h264.h:211
AVBufferRef * sps_list[MAX_SPS_COUNT]
Definition: h264.h:230
int scaling_matrix_present
Definition: h264.h:178
uint8_t scaling_matrix4[6][16]
Definition: h264.h:179
#define MAX_PPS_COUNT
Definition: h264.h:54
Sequence parameter set.
Definition: h264.h:136
int bitstream_restriction_flag
Definition: h264.h:176
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264.h:206
int num
numerator
Definition: rational.h:44
const uint8_t * buffer
Definition: get_bits.h:56
Picture parameter set.
Definition: h264.h:200
int frame_mbs_only_flag
Definition: h264.h:153
const uint8_t ff_h264_quant_rem6[QP_MAX_NUM+1]
Definition: h264data.c:174
int chroma_qp_diff
Definition: h264.h:219
uint32_t num_units_in_tick
Definition: h264.h:172
int profile_idc
Definition: h264.h:138
unsigned int crop_top
frame_cropping_rect_top_offset
Definition: h264.h:161
int fixed_frame_rate_flag
Definition: h264.h:174
uint8_t scaling_matrix4[6][16]
Definition: h264.h:216
int deblocking_filter_parameters_present
deblocking_filter_parameters_present_flag
Definition: h264.h:212
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.h:236
uint8_t
int full_range
Definition: h264.h:166
unsigned int crop_left
frame_cropping_rect_left_offset
Definition: h264.h:159
int offset_for_non_ref_pic
Definition: h264.h:146
int gaps_in_frame_num_allowed_flag
Definition: h264.h:150
int bit_depth_chroma
bit_depth_chroma_minus8 + 8
Definition: h264.h:190
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2897
enum AVColorPrimaries color_primaries
Definition: h264.h:168
#define AV_CODEC_FLAG_UNALIGNED
Allow decoders to produce frames with data planes that are not aligned to CPU requirements (e...
Definition: avcodec.h:826
int cabac
entropy_coding_mode_flag
Definition: h264.h:202
unsigned int crop_right
frame_cropping_rect_right_offset
Definition: h264.h:160
uint32_t(*[6] dequant4_coeff)[16]
Definition: h264.h:225
#define height
int transform_bypass
qpprime_y_zero_transform_bypass_flag
Definition: h264.h:141
uint32_t(*[6] dequant8_coeff)[64]
Definition: h264.h:226
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:68
int redundant_pic_cnt_present
redundant_pic_cnt_present_flag
Definition: h264.h:214
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define MAX_DELAYED_PIC_COUNT
Definition: h264.h:58
ptrdiff_t size
Definition: opengl_enc.c:101
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2400
#define av_log(a,...)
static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size, const uint8_t *jvt_list, const uint8_t *fallback_list)
Definition: h264_ps.c:248
#define ue(...)
H.264 / AVC / MPEG-4 part10 codec.
#define U(x)
Definition: vp56_arith.h:37
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:568
int mb_aff
mb_adaptive_frame_field_flag
Definition: h264.h:154
enum AVColorTransferCharacteristic color_trc
Definition: h264.h:169
AVBufferRef * sps_ref
Definition: h264.h:234
#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:921
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.h:143
int constrained_intra_pred
constrained_intra_pred_flag
Definition: h264.h:213
int num_reorder_frames
Definition: h264.h:177
#define AVERROR(e)
Definition: error.h:43
int time_offset_length
Definition: h264.h:184
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:404
#define EXTENDED_SAR
Definition: h264.h:105
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1752
int weighted_pred
weighted_pred_flag
Definition: h264.h:207
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:269
#define MIN_LOG2_MAX_FRAME_NUM
Definition: h264_ps.c:39
int residual_color_transform_flag
residual_colour_transform_flag
Definition: h264.h:191
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:82
int delta_pic_order_always_zero_flag
Definition: h264.h:145
int offset_for_top_to_bottom_field
Definition: h264.h:147
int depth
Definition: v4l.c:62
static void remove_sps(H264ParamSets *s, int id)
Definition: h264_ps.c:92
static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:617
int crop
frame_cropping_flag
Definition: h264.h:156
uint8_t scaling_matrix8[6][64]
Definition: h264.h:217
size_t data_size
Definition: h264.h:194
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:251
int ref_frame_count
num_ref_frames
Definition: h264.h:149
int initial_cpb_removal_delay_length
initial_cpb_removal_delay_length_minus1 + 1
Definition: h264.h:186
uint8_t data[4096]
Definition: h264.h:220
#define FFMIN(a, b)
Definition: common.h:96
int poc_cycle_length
num_ref_frames_in_pic_order_cnt_cycle
Definition: h264.h:148
int colour_description_present_flag
Definition: h264.h:167
AVRational sar
Definition: h264.h:164
#define width
#define MAX_SPS_COUNT
Definition: h264.h:53
uint8_t chroma_qp_table[2][QP_MAX_NUM+1]
pre-scaled (with chroma_qp_index_offset) version of qp_table
Definition: h264.h:218
int init_qp
pic_init_qp_minus26 + 26
Definition: h264.h:209
int direct_8x8_inference_flag
Definition: h264.h:155
uint8_t scaling_matrix8[6][64]
Definition: h264.h:180
unsigned int sps_id
Definition: h264.h:137
#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.h:203
short offset_for_ref_frame[256]
Definition: h264.h:175
static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
Definition: h264_ps.c:698
static int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx, SPS *sps)
Definition: h264_ps.c:132
int timing_info_present_flag
Definition: h264.h:171
int vcl_hrd_parameters_present_flag
Definition: h264.h:182
Libavcodec external API header.
AVBufferRef * pps_list[MAX_PPS_COUNT]
Definition: h264.h:231
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:2896
main external API structure.
Definition: avcodec.h:1657
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.h:188
uint8_t * data
The data buffer.
Definition: buffer.h:89
int vui_parameters_present_flag
Definition: h264.h:163
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1689
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:644
AVBufferRef * av_buffer_allocz(int size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:82
int constraint_set_flags
constraint_set[0-3]_flag
Definition: h264.h:192
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:299
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:292
int index
Definition: gxfenc.c:89
Not part of ABI.
Definition: pixfmt.h:430
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:2876
const SPS * sps
Definition: h264.h:237
#define u(width,...)
unsigned int sps_id
Definition: h264.h:201
int log2_max_poc_lsb
log2_max_pic_order_cnt_lsb_minus4
Definition: h264.h:144
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:332
int size
Size of data in bytes.
Definition: buffer.h:93
uint32_t time_scale
Definition: h264.h:173
int transform_8x8_mode
transform_8x8_mode_flag
Definition: h264.h:215
#define SIZE_SPECIFIER
Definition: internal.h:252
int pic_struct_present_flag
Definition: h264.h:183
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
pic_height_in_map_units_minus1 + 1
Definition: h264.h:152
int init_qs
pic_init_qs_minus26 + 26
Definition: h264.h:210
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
uint8_t data[4096]
Definition: h264.h:193
AVBufferRef * pps_ref
Definition: h264.h:233
int nal_hrd_parameters_present_flag
Definition: h264.h:181
size_t data_size
Definition: h264.h:221
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264.h:142
const uint8_t * buffer_end
Definition: get_bits.h:56
static const uint8_t default_scaling4[2][16]
Definition: h264_ps.c:41
int den
denominator
Definition: rational.h:45
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:305
int bit_depth_luma
bit_depth_luma_minus8 + 8
Definition: h264.h:189
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:322
int mb_width
pic_width_in_mbs_minus1 + 1
Definition: h264.h:151
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1759
int slice_group_count
num_slice_groups_minus1 + 1
Definition: h264.h:204
int cpb_cnt
See H.264 E.1.2.
Definition: h264.h:185
uint32_t dequant4_buffer[6][QP_MAX_NUM+1][16]
Definition: h264.h:223
static const uint8_t default_scaling8[2][64]
Definition: h264_ps.c:48
uint32_t dequant8_buffer[6][QP_MAX_NUM+1][64]
Definition: h264.h:224
int cpb_removal_delay_length
cpb_removal_delay_length_minus1 + 1
Definition: h264.h:187
static void init_dequant_tables(PPS *pps, const SPS *sps)
Definition: h264_ps.c:670
#define MKTAG(a, b, c, d)
Definition: common.h:342
unsigned int crop_bottom
frame_cropping_rect_bottom_offset
Definition: h264.h:162
exp golomb vlc stuff
int level_idc
Definition: h264.h:139
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2874
Not part of ABI.
Definition: pixfmt.h:448
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:689
int mb_slice_group_map_type
Definition: h264.h:205
enum AVColorSpace colorspace
Definition: h264.h:170