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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 void 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  next = (last + get_se_golomb(gb)) & 0xff;
262  if (!i && !next) { /* matrix not written, we use the preset one */
263  memcpy(factors, jvt_list, size * sizeof(uint8_t));
264  break;
265  }
266  last = factors[scan[i]] = next ? next : last;
267  }
268 }
269 
270 /* returns non zero if the provided SPS scaling matrix has been filled */
271 static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
272  const PPS *pps, int is_sps,
273  uint8_t(*scaling_matrix4)[16],
274  uint8_t(*scaling_matrix8)[64])
275 {
276  int fallback_sps = !is_sps && sps->scaling_matrix_present;
277  const uint8_t *fallback[4] = {
278  fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
279  fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
280  fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
281  fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
282  };
283  int ret = 0;
284  if (get_bits1(gb)) {
285  ret = is_sps;
286  decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
287  decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
288  decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
289  decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
290  decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
291  decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
292  if (is_sps || pps->transform_8x8_mode) {
293  decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
294  decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
295  if (sps->chroma_format_idc == 3) {
296  decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
297  decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
298  decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
299  decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
300  }
301  }
302  }
303 
304  return ret;
305 }
306 
308 {
309  int i;
310 
311  for (i = 0; i < MAX_SPS_COUNT; i++)
312  av_buffer_unref(&ps->sps_list[i]);
313 
314  for (i = 0; i < MAX_PPS_COUNT; i++)
315  av_buffer_unref(&ps->pps_list[i]);
316 
317  av_buffer_unref(&ps->sps_ref);
318  av_buffer_unref(&ps->pps_ref);
319 
320  ps->pps = NULL;
321  ps->sps = NULL;
322 }
323 
325  H264ParamSets *ps, int ignore_truncation)
326 {
327  AVBufferRef *sps_buf;
328  int profile_idc, level_idc, constraint_set_flags = 0;
329  unsigned int sps_id;
330  int i, log2_max_frame_num_minus4;
331  SPS *sps;
332 
333  sps_buf = av_buffer_allocz(sizeof(*sps));
334  if (!sps_buf)
335  return AVERROR(ENOMEM);
336  sps = (SPS*)sps_buf->data;
337 
338  sps->data_size = gb->buffer_end - gb->buffer;
339  if (sps->data_size > sizeof(sps->data)) {
340  av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS\n");
341  sps->data_size = sizeof(sps->data);
342  }
343  memcpy(sps->data, gb->buffer, sps->data_size);
344 
345  profile_idc = get_bits(gb, 8);
346  constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
347  constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
348  constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
349  constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
350  constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
351  constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
352  skip_bits(gb, 2); // reserved_zero_2bits
353  level_idc = get_bits(gb, 8);
354  sps_id = get_ue_golomb_31(gb);
355 
356  if (sps_id >= MAX_SPS_COUNT) {
357  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
358  goto fail;
359  }
360 
361  sps->sps_id = sps_id;
362  sps->time_offset_length = 24;
363  sps->profile_idc = profile_idc;
364  sps->constraint_set_flags = constraint_set_flags;
365  sps->level_idc = level_idc;
366  sps->full_range = -1;
367 
368  memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
369  memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
370  sps->scaling_matrix_present = 0;
371  sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
372 
373  if (sps->profile_idc == 100 || // High profile
374  sps->profile_idc == 110 || // High10 profile
375  sps->profile_idc == 122 || // High422 profile
376  sps->profile_idc == 244 || // High444 Predictive profile
377  sps->profile_idc == 44 || // Cavlc444 profile
378  sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
379  sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
380  sps->profile_idc == 118 || // Stereo High profile (MVC)
381  sps->profile_idc == 128 || // Multiview High profile (MVC)
382  sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
383  sps->profile_idc == 144) { // old High444 profile
385  if (sps->chroma_format_idc > 3U) {
386  avpriv_request_sample(avctx, "chroma_format_idc %u",
387  sps->chroma_format_idc);
388  goto fail;
389  } else if (sps->chroma_format_idc == 3) {
392  av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
393  goto fail;
394  }
395  }
396  sps->bit_depth_luma = get_ue_golomb(gb) + 8;
397  sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
398  if (sps->bit_depth_chroma != sps->bit_depth_luma) {
399  avpriv_request_sample(avctx,
400  "Different chroma and luma bit depth");
401  goto fail;
402  }
403  if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
404  sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
405  av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
406  sps->bit_depth_luma, sps->bit_depth_chroma);
407  goto fail;
408  }
409  sps->transform_bypass = get_bits1(gb);
411  sps->scaling_matrix4, sps->scaling_matrix8);
412  } else {
413  sps->chroma_format_idc = 1;
414  sps->bit_depth_luma = 8;
415  sps->bit_depth_chroma = 8;
416  }
417 
418  log2_max_frame_num_minus4 = get_ue_golomb(gb);
419  if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
420  log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
421  av_log(avctx, AV_LOG_ERROR,
422  "log2_max_frame_num_minus4 out of range (0-12): %d\n",
423  log2_max_frame_num_minus4);
424  goto fail;
425  }
426  sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
427 
428  sps->poc_type = get_ue_golomb_31(gb);
429 
430  if (sps->poc_type == 0) { // FIXME #define
431  unsigned t = get_ue_golomb(gb);
432  if (t>12) {
433  av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
434  goto fail;
435  }
436  sps->log2_max_poc_lsb = t + 4;
437  } else if (sps->poc_type == 1) { // FIXME #define
441  sps->poc_cycle_length = get_ue_golomb(gb);
442 
443  if ((unsigned)sps->poc_cycle_length >=
445  av_log(avctx, AV_LOG_ERROR,
446  "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
447  goto fail;
448  }
449 
450  for (i = 0; i < sps->poc_cycle_length; i++)
451  sps->offset_for_ref_frame[i] = get_se_golomb(gb);
452  } else if (sps->poc_type != 2) {
453  av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
454  goto fail;
455  }
456 
458  if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
459  sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
461  av_log(avctx, AV_LOG_ERROR,
462  "too many reference frames %d\n", sps->ref_frame_count);
463  goto fail;
464  }
466  sps->mb_width = get_ue_golomb(gb) + 1;
467  sps->mb_height = get_ue_golomb(gb) + 1;
468 
469  sps->frame_mbs_only_flag = get_bits1(gb);
470 
471  if (sps->mb_height >= INT_MAX / 2) {
472  av_log(avctx, AV_LOG_ERROR, "height overflow\n");
473  goto fail;
474  }
475  sps->mb_height *= 2 - sps->frame_mbs_only_flag;
476 
477  if (!sps->frame_mbs_only_flag)
478  sps->mb_aff = get_bits1(gb);
479  else
480  sps->mb_aff = 0;
481 
482  if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
483  (unsigned)sps->mb_height >= INT_MAX / 16 ||
484  av_image_check_size(16 * sps->mb_width,
485  16 * sps->mb_height, 0, avctx)) {
486  av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
487  goto fail;
488  }
489 
491 
492 #ifndef ALLOW_INTERLACE
493  if (sps->mb_aff)
494  av_log(avctx, AV_LOG_ERROR,
495  "MBAFF support not included; enable it at compile-time.\n");
496 #endif
497  sps->crop = get_bits1(gb);
498  if (sps->crop) {
499  unsigned int crop_left = get_ue_golomb(gb);
500  unsigned int crop_right = get_ue_golomb(gb);
501  unsigned int crop_top = get_ue_golomb(gb);
502  unsigned int crop_bottom = get_ue_golomb(gb);
503  int width = 16 * sps->mb_width;
504  int height = 16 * sps->mb_height;
505 
506  if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
507  av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
508  "values are l:%d r:%d t:%d b:%d\n",
509  crop_left, crop_right, crop_top, crop_bottom);
510 
511  sps->crop_left =
512  sps->crop_right =
513  sps->crop_top =
514  sps->crop_bottom = 0;
515  } else {
516  int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
517  int hsub = (sps->chroma_format_idc == 1 ||
518  sps->chroma_format_idc == 2) ? 1 : 0;
519  int step_x = 1 << hsub;
520  int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
521 
522  if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) &&
523  !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {
524  crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8));
525  av_log(avctx, AV_LOG_WARNING,
526  "Reducing left cropping to %d "
527  "chroma samples to preserve alignment.\n",
528  crop_left);
529  }
530 
531  if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
532  crop_right > (unsigned)INT_MAX / 4 / step_x ||
533  crop_top > (unsigned)INT_MAX / 4 / step_y ||
534  crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
535  (crop_left + crop_right ) * step_x >= width ||
536  (crop_top + crop_bottom) * step_y >= height
537  ) {
538  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);
539  goto fail;
540  }
541 
542  sps->crop_left = crop_left * step_x;
543  sps->crop_right = crop_right * step_x;
544  sps->crop_top = crop_top * step_y;
545  sps->crop_bottom = crop_bottom * step_y;
546  }
547  } else {
548  sps->crop_left =
549  sps->crop_right =
550  sps->crop_top =
551  sps->crop_bottom =
552  sps->crop = 0;
553  }
554 
556  if (sps->vui_parameters_present_flag) {
557  int ret = decode_vui_parameters(gb, avctx, sps);
558  if (ret < 0)
559  goto fail;
560  }
561 
562  if (get_bits_left(gb) < 0) {
563  av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
564  "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
565  if (!ignore_truncation)
566  goto fail;
567  }
568 
569  /* if the maximum delay is not stored in the SPS, derive it based on the
570  * level */
571  if (!sps->bitstream_restriction_flag &&
574  for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
575  if (level_max_dpb_mbs[i][0] == sps->level_idc) {
576  sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
577  sps->num_reorder_frames);
578  break;
579  }
580  }
581  }
582 
583  if (!sps->sar.den)
584  sps->sar.den = 1;
585 
586  if (avctx->debug & FF_DEBUG_PICT_INFO) {
587  static const char csp[4][5] = { "Gray", "420", "422", "444" };
588  av_log(avctx, AV_LOG_DEBUG,
589  "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",
590  sps_id, sps->profile_idc, sps->level_idc,
591  sps->poc_type,
592  sps->ref_frame_count,
593  sps->mb_width, sps->mb_height,
594  sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
595  sps->direct_8x8_inference_flag ? "8B8" : "",
596  sps->crop_left, sps->crop_right,
597  sps->crop_top, sps->crop_bottom,
598  sps->vui_parameters_present_flag ? "VUI" : "",
599  csp[sps->chroma_format_idc],
601  sps->timing_info_present_flag ? sps->time_scale : 0,
602  sps->bit_depth_luma,
604  );
605  }
606 
607  /* check if this is a repeat of an already parsed SPS, then keep the
608  * original one.
609  * otherwise drop all PPSes that depend on it */
610  if (ps->sps_list[sps_id] &&
611  !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
612  av_buffer_unref(&sps_buf);
613  } else {
614  remove_sps(ps, sps_id);
615  ps->sps_list[sps_id] = sps_buf;
616  }
617 
618  return 0;
619 
620 fail:
621  av_buffer_unref(&sps_buf);
622  return AVERROR_INVALIDDATA;
623 }
624 
625 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
626 {
627  int i, j, q, x;
628  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
629 
630  for (i = 0; i < 6; i++) {
631  pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
632  for (j = 0; j < i; j++)
633  if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
634  64 * sizeof(uint8_t))) {
635  pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
636  break;
637  }
638  if (j < i)
639  continue;
640 
641  for (q = 0; q < max_qp + 1; q++) {
642  int shift = ff_h264_quant_div6[q];
643  int idx = ff_h264_quant_rem6[q];
644  for (x = 0; x < 64; x++)
645  pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
646  ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
647  pps->scaling_matrix8[i][x]) << shift;
648  }
649  }
650 }
651 
652 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
653 {
654  int i, j, q, x;
655  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
656  for (i = 0; i < 6; i++) {
657  pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
658  for (j = 0; j < i; j++)
659  if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
660  16 * sizeof(uint8_t))) {
661  pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
662  break;
663  }
664  if (j < i)
665  continue;
666 
667  for (q = 0; q < max_qp + 1; q++) {
668  int shift = ff_h264_quant_div6[q] + 2;
669  int idx = ff_h264_quant_rem6[q];
670  for (x = 0; x < 16; x++)
671  pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
672  ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
673  pps->scaling_matrix4[i][x]) << shift;
674  }
675  }
676 }
677 
678 static void init_dequant_tables(PPS *pps, const SPS *sps)
679 {
680  int i, x;
681  init_dequant4_coeff_table(pps, sps);
682  memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
683 
684  if (pps->transform_8x8_mode)
685  init_dequant8_coeff_table(pps, sps);
686  if (sps->transform_bypass) {
687  for (i = 0; i < 6; i++)
688  for (x = 0; x < 16; x++)
689  pps->dequant4_coeff[i][0][x] = 1 << 6;
690  if (pps->transform_8x8_mode)
691  for (i = 0; i < 6; i++)
692  for (x = 0; x < 64; x++)
693  pps->dequant8_coeff[i][0][x] = 1 << 6;
694  }
695 }
696 
697 static void build_qp_table(PPS *pps, int t, int index, const int depth)
698 {
699  int i;
700  const int max_qp = 51 + 6 * (depth - 8);
701  for (i = 0; i < max_qp + 1; i++)
702  pps->chroma_qp_table[t][i] =
703  ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
704 }
705 
706 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
707 {
708  int profile_idc = sps->profile_idc;
709 
710  if ((profile_idc == 66 || profile_idc == 77 ||
711  profile_idc == 88) && (sps->constraint_set_flags & 7)) {
712  av_log(logctx, AV_LOG_VERBOSE,
713  "Current profile doesn't provide more RBSP data in PPS, skipping\n");
714  return 0;
715  }
716 
717  return 1;
718 }
719 
721  H264ParamSets *ps, int bit_length)
722 {
723  AVBufferRef *pps_buf;
724  const SPS *sps;
725  unsigned int pps_id = get_ue_golomb(gb);
726  PPS *pps;
727  int qp_bd_offset;
728  int bits_left;
729  int ret;
730 
731  if (pps_id >= MAX_PPS_COUNT) {
732  av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
733  return AVERROR_INVALIDDATA;
734  }
735 
736  pps_buf = av_buffer_allocz(sizeof(*pps));
737  if (!pps_buf)
738  return AVERROR(ENOMEM);
739  pps = (PPS*)pps_buf->data;
740 
741  pps->data_size = gb->buffer_end - gb->buffer;
742  if (pps->data_size > sizeof(pps->data)) {
743  av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "
744  "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
745  pps->data_size, sizeof(pps->data));
746  pps->data_size = sizeof(pps->data);
747  }
748  memcpy(pps->data, gb->buffer, pps->data_size);
749 
750  pps->sps_id = get_ue_golomb_31(gb);
751  if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
752  !ps->sps_list[pps->sps_id]) {
753  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
754  ret = AVERROR_INVALIDDATA;
755  goto fail;
756  }
757  sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
758  if (sps->bit_depth_luma > 14) {
759  av_log(avctx, AV_LOG_ERROR,
760  "Invalid luma bit depth=%d\n",
761  sps->bit_depth_luma);
762  ret = AVERROR_INVALIDDATA;
763  goto fail;
764  } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
765  av_log(avctx, AV_LOG_ERROR,
766  "Unimplemented luma bit depth=%d\n",
767  sps->bit_depth_luma);
768  ret = AVERROR_PATCHWELCOME;
769  goto fail;
770  }
771 
772  pps->cabac = get_bits1(gb);
773  pps->pic_order_present = get_bits1(gb);
774  pps->slice_group_count = get_ue_golomb(gb) + 1;
775  if (pps->slice_group_count > 1) {
777  av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
778  switch (pps->mb_slice_group_map_type) {
779  case 0:
780 #if 0
781  | for (i = 0; i <= num_slice_groups_minus1; i++) | | |
782  | run_length[i] |1 |ue(v) |
783 #endif
784  break;
785  case 2:
786 #if 0
787  | for (i = 0; i < num_slice_groups_minus1; i++) { | | |
788  | top_left_mb[i] |1 |ue(v) |
789  | bottom_right_mb[i] |1 |ue(v) |
790  | } | | |
791 #endif
792  break;
793  case 3:
794  case 4:
795  case 5:
796 #if 0
797  | slice_group_change_direction_flag |1 |u(1) |
798  | slice_group_change_rate_minus1 |1 |ue(v) |
799 #endif
800  break;
801  case 6:
802 #if 0
803  | slice_group_id_cnt_minus1 |1 |ue(v) |
804  | for (i = 0; i <= slice_group_id_cnt_minus1; i++)| | |
805  | slice_group_id[i] |1 |u(v) |
806 #endif
807  break;
808  }
809  }
810  pps->ref_count[0] = get_ue_golomb(gb) + 1;
811  pps->ref_count[1] = get_ue_golomb(gb) + 1;
812  if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
813  av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
814  ret = AVERROR_INVALIDDATA;
815  goto fail;
816  }
817 
818  qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
819 
820  pps->weighted_pred = get_bits1(gb);
821  pps->weighted_bipred_idc = get_bits(gb, 2);
822  pps->init_qp = get_se_golomb(gb) + 26 + qp_bd_offset;
823  pps->init_qs = get_se_golomb(gb) + 26 + qp_bd_offset;
828 
829  pps->transform_8x8_mode = 0;
830  memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
831  sizeof(pps->scaling_matrix4));
832  memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
833  sizeof(pps->scaling_matrix8));
834 
835  bits_left = bit_length - get_bits_count(gb);
836  if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
837  pps->transform_8x8_mode = get_bits1(gb);
838  decode_scaling_matrices(gb, sps, pps, 0,
839  pps->scaling_matrix4, pps->scaling_matrix8);
840  // second_chroma_qp_index_offset
842  } else {
844  }
845 
846  build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
847  sps->bit_depth_luma);
848  build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
849  sps->bit_depth_luma);
850 
851  init_dequant_tables(pps, sps);
852 
853  if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
854  pps->chroma_qp_diff = 1;
855 
856  if (avctx->debug & FF_DEBUG_PICT_INFO) {
857  av_log(avctx, AV_LOG_DEBUG,
858  "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
859  pps_id, pps->sps_id,
860  pps->cabac ? "CABAC" : "CAVLC",
861  pps->slice_group_count,
862  pps->ref_count[0], pps->ref_count[1],
863  pps->weighted_pred ? "weighted" : "",
864  pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
865  pps->deblocking_filter_parameters_present ? "LPAR" : "",
866  pps->constrained_intra_pred ? "CONSTR" : "",
867  pps->redundant_pic_cnt_present ? "REDU" : "",
868  pps->transform_8x8_mode ? "8x8DCT" : "");
869  }
870 
871  remove_pps(ps, pps_id);
872  ps->pps_list[pps_id] = pps_buf;
873 
874  return 0;
875 
876 fail:
877  av_buffer_unref(&pps_buf);
878  return ret;
879 }
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:720
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_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:124
#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:247
#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:2924
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:829
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:2426
#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:250
#define ue(...)
#define U(x)
Definition: vp56_arith.h:37
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:572
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:924
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:1777
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:271
#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:84
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:625
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:251
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
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:706
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:2923
main external API structure.
Definition: avcodec.h:1682
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:1714
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:652
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_ps.h:100
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: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:2903
const SPS * sps
Definition: h264_ps.h:145
#define u(width,...)
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:332
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:252
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:307
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:324
int mb_width
pic_width_in_mbs_minus1 + 1
Definition: h264_ps.h:58
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1784
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:678
#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:2901
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:697
int mb_slice_group_map_type
Definition: h264_ps.h:113
enum AVColorSpace colorspace
Definition: h264_ps.h:78