FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
h264_ps.c
Go to the documentation of this file.
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 MIN_LOG2_MAX_FRAME_NUM 4
39 
40 #define EXTENDED_SAR 255
41 
42 static const uint8_t default_scaling4[2][16] = {
43  { 6, 13, 20, 28, 13, 20, 28, 32,
44  20, 28, 32, 37, 28, 32, 37, 42 },
45  { 10, 14, 20, 24, 14, 20, 24, 27,
46  20, 24, 27, 30, 24, 27, 30, 34 }
47 };
48 
49 static const uint8_t default_scaling8[2][64] = {
50  { 6, 10, 13, 16, 18, 23, 25, 27,
51  10, 11, 16, 18, 23, 25, 27, 29,
52  13, 16, 18, 23, 25, 27, 29, 31,
53  16, 18, 23, 25, 27, 29, 31, 33,
54  18, 23, 25, 27, 29, 31, 33, 36,
55  23, 25, 27, 29, 31, 33, 36, 38,
56  25, 27, 29, 31, 33, 36, 38, 40,
57  27, 29, 31, 33, 36, 38, 40, 42 },
58  { 9, 13, 15, 17, 19, 21, 22, 24,
59  13, 13, 17, 19, 21, 22, 24, 25,
60  15, 17, 19, 21, 22, 24, 25, 27,
61  17, 19, 21, 22, 24, 25, 27, 28,
62  19, 21, 22, 24, 25, 27, 28, 30,
63  21, 22, 24, 25, 27, 28, 30, 32,
64  22, 24, 25, 27, 28, 30, 32, 33,
65  24, 25, 27, 28, 30, 32, 33, 35 }
66 };
67 
68 /* maximum number of MBs in the DPB for a given level */
69 static const int level_max_dpb_mbs[][2] = {
70  { 10, 396 },
71  { 11, 900 },
72  { 12, 2376 },
73  { 13, 2376 },
74  { 20, 2376 },
75  { 21, 4752 },
76  { 22, 8100 },
77  { 30, 8100 },
78  { 31, 18000 },
79  { 32, 20480 },
80  { 40, 32768 },
81  { 41, 32768 },
82  { 42, 34816 },
83  { 50, 110400 },
84  { 51, 184320 },
85  { 52, 184320 },
86 };
87 
88 static void remove_pps(H264ParamSets *s, int id)
89 {
90  av_buffer_unref(&s->pps_list[id]);
91 }
92 
93 static void remove_sps(H264ParamSets *s, int id)
94 {
95 #if 0
96  int i;
97  if (s->sps_list[id]) {
98  /* drop all PPS that depend on this SPS */
99  for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
100  if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
101  remove_pps(s, i);
102  }
103 #endif
104  av_buffer_unref(&s->sps_list[id]);
105 }
106 
107 static inline int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx,
108  SPS *sps)
109 {
110  int cpb_count, i;
111  cpb_count = get_ue_golomb_31(gb) + 1;
112 
113  if (cpb_count > 32U) {
114  av_log(avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
115  return AVERROR_INVALIDDATA;
116  }
117 
118  get_bits(gb, 4); /* bit_rate_scale */
119  get_bits(gb, 4); /* cpb_size_scale */
120  for (i = 0; i < cpb_count; i++) {
121  get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
122  get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
123  get_bits1(gb); /* cbr_flag */
124  }
125  sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
126  sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
127  sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
128  sps->time_offset_length = get_bits(gb, 5);
129  sps->cpb_cnt = cpb_count;
130  return 0;
131 }
132 
133 static inline int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx,
134  SPS *sps)
135 {
136  int aspect_ratio_info_present_flag;
137  unsigned int aspect_ratio_idc;
138 
139  aspect_ratio_info_present_flag = get_bits1(gb);
140 
141  if (aspect_ratio_info_present_flag) {
142  aspect_ratio_idc = get_bits(gb, 8);
143  if (aspect_ratio_idc == EXTENDED_SAR) {
144  sps->sar.num = get_bits(gb, 16);
145  sps->sar.den = get_bits(gb, 16);
146  } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
147  sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
148  } else {
149  av_log(avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
150  return AVERROR_INVALIDDATA;
151  }
152  } else {
153  sps->sar.num =
154  sps->sar.den = 0;
155  }
156 
157  if (get_bits1(gb)) /* overscan_info_present_flag */
158  get_bits1(gb); /* overscan_appropriate_flag */
159 
162  get_bits(gb, 3); /* video_format */
163  sps->full_range = get_bits1(gb); /* video_full_range_flag */
164 
167  sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
168  sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
169  sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
170 
171  // Set invalid values to "unspecified"
176  if (!av_color_space_name(sps->colorspace))
178  }
179  }
180 
181  /* chroma_location_info_present_flag */
182  if (get_bits1(gb)) {
183  /* chroma_sample_location_type_top_field */
184  avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
185  get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
186  }
187 
188  if (show_bits1(gb) && get_bits_left(gb) < 10) {
189  av_log(avctx, AV_LOG_WARNING, "Truncated VUI\n");
190  return 0;
191  }
192 
194  if (sps->timing_info_present_flag) {
195  unsigned num_units_in_tick = get_bits_long(gb, 32);
196  unsigned time_scale = get_bits_long(gb, 32);
197  if (!num_units_in_tick || !time_scale) {
198  av_log(avctx, AV_LOG_ERROR,
199  "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
200  time_scale, num_units_in_tick);
201  sps->timing_info_present_flag = 0;
202  } else {
203  sps->num_units_in_tick = num_units_in_tick;
204  sps->time_scale = time_scale;
205  }
206  sps->fixed_frame_rate_flag = get_bits1(gb);
207  }
208 
211  if (decode_hrd_parameters(gb, avctx, sps) < 0)
212  return AVERROR_INVALIDDATA;
215  if (decode_hrd_parameters(gb, avctx, sps) < 0)
216  return AVERROR_INVALIDDATA;
219  get_bits1(gb); /* low_delay_hrd_flag */
221  if (!get_bits_left(gb))
222  return 0;
224  if (sps->bitstream_restriction_flag) {
225  get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
226  get_ue_golomb(gb); /* max_bytes_per_pic_denom */
227  get_ue_golomb(gb); /* max_bits_per_mb_denom */
228  get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
229  get_ue_golomb(gb); /* log2_max_mv_length_vertical */
231  get_ue_golomb(gb); /*max_dec_frame_buffering*/
232 
233  if (get_bits_left(gb) < 0) {
234  sps->num_reorder_frames = 0;
236  }
237 
238  if (sps->num_reorder_frames > 16U
239  /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
240  av_log(avctx, AV_LOG_ERROR,
241  "Clipping illegal num_reorder_frames %d\n",
242  sps->num_reorder_frames);
243  sps->num_reorder_frames = 16;
244  return AVERROR_INVALIDDATA;
245  }
246  }
247 
248  return 0;
249 }
250 
251 static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
252  const uint8_t *jvt_list,
253  const uint8_t *fallback_list)
254 {
255  int i, last = 8, next = 8;
256  const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
257  if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
258  memcpy(factors, fallback_list, size * sizeof(uint8_t));
259  else
260  for (i = 0; i < size; i++) {
261  if (next) {
262  int v = get_se_golomb(gb);
263  if (v < -128 || v > 127) {
264  av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
265  return AVERROR_INVALIDDATA;
266  }
267  next = (last + v) & 0xff;
268  }
269  if (!i && !next) { /* matrix not written, we use the preset one */
270  memcpy(factors, jvt_list, size * sizeof(uint8_t));
271  break;
272  }
273  last = factors[scan[i]] = next ? next : last;
274  }
275  return 0;
276 }
277 
278 /* returns non zero if the provided SPS scaling matrix has been filled */
280  const PPS *pps, int is_sps,
281  uint8_t(*scaling_matrix4)[16],
282  uint8_t(*scaling_matrix8)[64])
283 {
284  int fallback_sps = !is_sps && sps->scaling_matrix_present;
285  const uint8_t *fallback[4] = {
286  fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
287  fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
288  fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
289  fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
290  };
291  int ret = 0;
292  if (get_bits1(gb)) {
293  ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
294  ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
295  ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
296  ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
297  ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
298  ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
299  if (is_sps || pps->transform_8x8_mode) {
300  ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
301  ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
302  if (sps->chroma_format_idc == 3) {
303  ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
304  ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
305  ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
306  ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
307  }
308  }
309  if (!ret)
310  ret = is_sps;
311  }
312 
313  return ret;
314 }
315 
317 {
318  int i;
319 
320  for (i = 0; i < MAX_SPS_COUNT; i++)
321  av_buffer_unref(&ps->sps_list[i]);
322 
323  for (i = 0; i < MAX_PPS_COUNT; i++)
324  av_buffer_unref(&ps->pps_list[i]);
325 
326  av_buffer_unref(&ps->sps_ref);
327  av_buffer_unref(&ps->pps_ref);
328 
329  ps->pps = NULL;
330  ps->sps = NULL;
331 }
332 
334  H264ParamSets *ps, int ignore_truncation)
335 {
336  AVBufferRef *sps_buf;
337  int profile_idc, level_idc, constraint_set_flags = 0;
338  unsigned int sps_id;
339  int i, log2_max_frame_num_minus4;
340  SPS *sps;
341  int ret;
342 
343  sps_buf = av_buffer_allocz(sizeof(*sps));
344  if (!sps_buf)
345  return AVERROR(ENOMEM);
346  sps = (SPS*)sps_buf->data;
347 
348  sps->data_size = gb->buffer_end - gb->buffer;
349  if (sps->data_size > sizeof(sps->data)) {
350  av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized SPS\n");
351  sps->data_size = sizeof(sps->data);
352  }
353  memcpy(sps->data, gb->buffer, sps->data_size);
354 
355  profile_idc = get_bits(gb, 8);
356  constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
357  constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
358  constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
359  constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
360  constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
361  constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
362  skip_bits(gb, 2); // reserved_zero_2bits
363  level_idc = get_bits(gb, 8);
364  sps_id = get_ue_golomb_31(gb);
365 
366  if (sps_id >= MAX_SPS_COUNT) {
367  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
368  goto fail;
369  }
370 
371  sps->sps_id = sps_id;
372  sps->time_offset_length = 24;
373  sps->profile_idc = profile_idc;
374  sps->constraint_set_flags = constraint_set_flags;
375  sps->level_idc = level_idc;
376  sps->full_range = -1;
377 
378  memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
379  memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
380  sps->scaling_matrix_present = 0;
381  sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
382 
383  if (sps->profile_idc == 100 || // High profile
384  sps->profile_idc == 110 || // High10 profile
385  sps->profile_idc == 122 || // High422 profile
386  sps->profile_idc == 244 || // High444 Predictive profile
387  sps->profile_idc == 44 || // Cavlc444 profile
388  sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
389  sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
390  sps->profile_idc == 118 || // Stereo High profile (MVC)
391  sps->profile_idc == 128 || // Multiview High profile (MVC)
392  sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
393  sps->profile_idc == 144) { // old High444 profile
395  if (sps->chroma_format_idc > 3U) {
396  avpriv_request_sample(avctx, "chroma_format_idc %u",
397  sps->chroma_format_idc);
398  goto fail;
399  } else if (sps->chroma_format_idc == 3) {
402  av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
403  goto fail;
404  }
405  }
406  sps->bit_depth_luma = get_ue_golomb(gb) + 8;
407  sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
408  if (sps->bit_depth_chroma != sps->bit_depth_luma) {
409  avpriv_request_sample(avctx,
410  "Different chroma and luma bit depth");
411  goto fail;
412  }
413  if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
414  sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
415  av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
416  sps->bit_depth_luma, sps->bit_depth_chroma);
417  goto fail;
418  }
419  sps->transform_bypass = get_bits1(gb);
420  ret = decode_scaling_matrices(gb, sps, NULL, 1,
421  sps->scaling_matrix4, sps->scaling_matrix8);
422  if (ret < 0)
423  goto fail;
424  sps->scaling_matrix_present |= ret;
425  } else {
426  sps->chroma_format_idc = 1;
427  sps->bit_depth_luma = 8;
428  sps->bit_depth_chroma = 8;
429  }
430 
431  log2_max_frame_num_minus4 = get_ue_golomb(gb);
432  if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
433  log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
434  av_log(avctx, AV_LOG_ERROR,
435  "log2_max_frame_num_minus4 out of range (0-12): %d\n",
436  log2_max_frame_num_minus4);
437  goto fail;
438  }
439  sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
440 
441  sps->poc_type = get_ue_golomb_31(gb);
442 
443  if (sps->poc_type == 0) { // FIXME #define
444  unsigned t = get_ue_golomb(gb);
445  if (t>12) {
446  av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
447  goto fail;
448  }
449  sps->log2_max_poc_lsb = t + 4;
450  } else if (sps->poc_type == 1) { // FIXME #define
454  sps->poc_cycle_length = get_ue_golomb(gb);
455 
456  if ((unsigned)sps->poc_cycle_length >=
458  av_log(avctx, AV_LOG_ERROR,
459  "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
460  goto fail;
461  }
462 
463  for (i = 0; i < sps->poc_cycle_length; i++)
464  sps->offset_for_ref_frame[i] = get_se_golomb(gb);
465  } else if (sps->poc_type != 2) {
466  av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
467  goto fail;
468  }
469 
471  if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
472  sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
474  av_log(avctx, AV_LOG_ERROR,
475  "too many reference frames %d\n", sps->ref_frame_count);
476  goto fail;
477  }
479  sps->mb_width = get_ue_golomb(gb) + 1;
480  sps->mb_height = get_ue_golomb(gb) + 1;
481 
482  sps->frame_mbs_only_flag = get_bits1(gb);
483 
484  if (sps->mb_height >= INT_MAX / 2U) {
485  av_log(avctx, AV_LOG_ERROR, "height overflow\n");
486  goto fail;
487  }
488  sps->mb_height *= 2 - sps->frame_mbs_only_flag;
489 
490  if (!sps->frame_mbs_only_flag)
491  sps->mb_aff = get_bits1(gb);
492  else
493  sps->mb_aff = 0;
494 
495  if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
496  (unsigned)sps->mb_height >= INT_MAX / 16 ||
497  av_image_check_size(16 * sps->mb_width,
498  16 * sps->mb_height, 0, avctx)) {
499  av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
500  goto fail;
501  }
502 
504 
505 #ifndef ALLOW_INTERLACE
506  if (sps->mb_aff)
507  av_log(avctx, AV_LOG_ERROR,
508  "MBAFF support not included; enable it at compile-time.\n");
509 #endif
510  sps->crop = get_bits1(gb);
511  if (sps->crop) {
512  unsigned int crop_left = get_ue_golomb(gb);
513  unsigned int crop_right = get_ue_golomb(gb);
514  unsigned int crop_top = get_ue_golomb(gb);
515  unsigned int crop_bottom = get_ue_golomb(gb);
516  int width = 16 * sps->mb_width;
517  int height = 16 * sps->mb_height;
518 
519  if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
520  av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
521  "values are l:%d r:%d t:%d b:%d\n",
522  crop_left, crop_right, crop_top, crop_bottom);
523 
524  sps->crop_left =
525  sps->crop_right =
526  sps->crop_top =
527  sps->crop_bottom = 0;
528  } else {
529  int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
530  int hsub = (sps->chroma_format_idc == 1 ||
531  sps->chroma_format_idc == 2) ? 1 : 0;
532  int step_x = 1 << hsub;
533  int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
534 
535  if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
536  crop_right > (unsigned)INT_MAX / 4 / step_x ||
537  crop_top > (unsigned)INT_MAX / 4 / step_y ||
538  crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
539  (crop_left + crop_right ) * step_x >= width ||
540  (crop_top + crop_bottom) * step_y >= height
541  ) {
542  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);
543  goto fail;
544  }
545 
546  sps->crop_left = crop_left * step_x;
547  sps->crop_right = crop_right * step_x;
548  sps->crop_top = crop_top * step_y;
549  sps->crop_bottom = crop_bottom * step_y;
550  }
551  } else {
552  sps->crop_left =
553  sps->crop_right =
554  sps->crop_top =
555  sps->crop_bottom =
556  sps->crop = 0;
557  }
558 
560  if (sps->vui_parameters_present_flag) {
561  int ret = decode_vui_parameters(gb, avctx, sps);
562  if (ret < 0)
563  goto fail;
564  }
565 
566  if (get_bits_left(gb) < 0) {
567  av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
568  "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
569  if (!ignore_truncation)
570  goto fail;
571  }
572 
573  /* if the maximum delay is not stored in the SPS, derive it based on the
574  * level */
575  if (!sps->bitstream_restriction_flag &&
578  for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
579  if (level_max_dpb_mbs[i][0] == sps->level_idc) {
580  sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
581  sps->num_reorder_frames);
582  break;
583  }
584  }
585  }
586 
587  if (!sps->sar.den)
588  sps->sar.den = 1;
589 
590  if (avctx->debug & FF_DEBUG_PICT_INFO) {
591  static const char csp[4][5] = { "Gray", "420", "422", "444" };
592  av_log(avctx, AV_LOG_DEBUG,
593  "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",
594  sps_id, sps->profile_idc, sps->level_idc,
595  sps->poc_type,
596  sps->ref_frame_count,
597  sps->mb_width, sps->mb_height,
598  sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
599  sps->direct_8x8_inference_flag ? "8B8" : "",
600  sps->crop_left, sps->crop_right,
601  sps->crop_top, sps->crop_bottom,
602  sps->vui_parameters_present_flag ? "VUI" : "",
603  csp[sps->chroma_format_idc],
605  sps->timing_info_present_flag ? sps->time_scale : 0,
606  sps->bit_depth_luma,
608  );
609  }
610 
611  /* check if this is a repeat of an already parsed SPS, then keep the
612  * original one.
613  * otherwise drop all PPSes that depend on it */
614  if (ps->sps_list[sps_id] &&
615  !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
616  av_buffer_unref(&sps_buf);
617  } else {
618  remove_sps(ps, sps_id);
619  ps->sps_list[sps_id] = sps_buf;
620  }
621 
622  return 0;
623 
624 fail:
625  av_buffer_unref(&sps_buf);
626  return AVERROR_INVALIDDATA;
627 }
628 
629 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
630 {
631  int i, j, q, x;
632  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
633 
634  for (i = 0; i < 6; i++) {
635  pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
636  for (j = 0; j < i; j++)
637  if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
638  64 * sizeof(uint8_t))) {
639  pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
640  break;
641  }
642  if (j < i)
643  continue;
644 
645  for (q = 0; q < max_qp + 1; q++) {
646  int shift = ff_h264_quant_div6[q];
647  int idx = ff_h264_quant_rem6[q];
648  for (x = 0; x < 64; x++)
649  pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
650  ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
651  pps->scaling_matrix8[i][x]) << shift;
652  }
653  }
654 }
655 
656 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
657 {
658  int i, j, q, x;
659  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
660  for (i = 0; i < 6; i++) {
661  pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
662  for (j = 0; j < i; j++)
663  if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
664  16 * sizeof(uint8_t))) {
665  pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
666  break;
667  }
668  if (j < i)
669  continue;
670 
671  for (q = 0; q < max_qp + 1; q++) {
672  int shift = ff_h264_quant_div6[q] + 2;
673  int idx = ff_h264_quant_rem6[q];
674  for (x = 0; x < 16; x++)
675  pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
676  ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
677  pps->scaling_matrix4[i][x]) << shift;
678  }
679  }
680 }
681 
682 static void init_dequant_tables(PPS *pps, const SPS *sps)
683 {
684  int i, x;
685  init_dequant4_coeff_table(pps, sps);
686  memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
687 
688  if (pps->transform_8x8_mode)
689  init_dequant8_coeff_table(pps, sps);
690  if (sps->transform_bypass) {
691  for (i = 0; i < 6; i++)
692  for (x = 0; x < 16; x++)
693  pps->dequant4_coeff[i][0][x] = 1 << 6;
694  if (pps->transform_8x8_mode)
695  for (i = 0; i < 6; i++)
696  for (x = 0; x < 64; x++)
697  pps->dequant8_coeff[i][0][x] = 1 << 6;
698  }
699 }
700 
701 static void build_qp_table(PPS *pps, int t, int index, const int depth)
702 {
703  int i;
704  const int max_qp = 51 + 6 * (depth - 8);
705  for (i = 0; i < max_qp + 1; i++)
706  pps->chroma_qp_table[t][i] =
707  ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
708 }
709 
710 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
711 {
712  int profile_idc = sps->profile_idc;
713 
714  if ((profile_idc == 66 || profile_idc == 77 ||
715  profile_idc == 88) && (sps->constraint_set_flags & 7)) {
716  av_log(logctx, AV_LOG_VERBOSE,
717  "Current profile doesn't provide more RBSP data in PPS, skipping\n");
718  return 0;
719  }
720 
721  return 1;
722 }
723 
725  H264ParamSets *ps, int bit_length)
726 {
727  AVBufferRef *pps_buf;
728  const SPS *sps;
729  unsigned int pps_id = get_ue_golomb(gb);
730  PPS *pps;
731  int qp_bd_offset;
732  int bits_left;
733  int ret;
734 
735  if (pps_id >= MAX_PPS_COUNT) {
736  av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
737  return AVERROR_INVALIDDATA;
738  }
739 
740  pps_buf = av_buffer_allocz(sizeof(*pps));
741  if (!pps_buf)
742  return AVERROR(ENOMEM);
743  pps = (PPS*)pps_buf->data;
744 
745  pps->data_size = gb->buffer_end - gb->buffer;
746  if (pps->data_size > sizeof(pps->data)) {
747  av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS "
748  "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
749  pps->data_size, sizeof(pps->data));
750  pps->data_size = sizeof(pps->data);
751  }
752  memcpy(pps->data, gb->buffer, pps->data_size);
753 
754  pps->sps_id = get_ue_golomb_31(gb);
755  if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
756  !ps->sps_list[pps->sps_id]) {
757  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
758  ret = AVERROR_INVALIDDATA;
759  goto fail;
760  }
761  sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
762  if (sps->bit_depth_luma > 14) {
763  av_log(avctx, AV_LOG_ERROR,
764  "Invalid luma bit depth=%d\n",
765  sps->bit_depth_luma);
766  ret = AVERROR_INVALIDDATA;
767  goto fail;
768  } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
770  "Unimplemented luma bit depth=%d",
771  sps->bit_depth_luma);
772  ret = AVERROR_PATCHWELCOME;
773  goto fail;
774  }
775 
776  pps->cabac = get_bits1(gb);
777  pps->pic_order_present = get_bits1(gb);
778  pps->slice_group_count = get_ue_golomb(gb) + 1;
779  if (pps->slice_group_count > 1) {
781  av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
782  }
783  pps->ref_count[0] = get_ue_golomb(gb) + 1;
784  pps->ref_count[1] = get_ue_golomb(gb) + 1;
785  if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
786  av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
787  ret = AVERROR_INVALIDDATA;
788  goto fail;
789  }
790 
791  qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
792 
793  pps->weighted_pred = get_bits1(gb);
794  pps->weighted_bipred_idc = get_bits(gb, 2);
795  pps->init_qp = get_se_golomb(gb) + 26U + qp_bd_offset;
796  pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset;
798  if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
799  ret = AVERROR_INVALIDDATA;
800  goto fail;
801  }
802 
806 
807  pps->transform_8x8_mode = 0;
808  memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
809  sizeof(pps->scaling_matrix4));
810  memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
811  sizeof(pps->scaling_matrix8));
812 
813  bits_left = bit_length - get_bits_count(gb);
814  if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
815  pps->transform_8x8_mode = get_bits1(gb);
816  ret = decode_scaling_matrices(gb, sps, pps, 0,
817  pps->scaling_matrix4, pps->scaling_matrix8);
818  if (ret < 0)
819  goto fail;
820  // second_chroma_qp_index_offset
822  if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
823  ret = AVERROR_INVALIDDATA;
824  goto fail;
825  }
826  } else {
828  }
829 
830  build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
831  sps->bit_depth_luma);
832  build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
833  sps->bit_depth_luma);
834 
835  init_dequant_tables(pps, sps);
836 
837  if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
838  pps->chroma_qp_diff = 1;
839 
840  if (avctx->debug & FF_DEBUG_PICT_INFO) {
841  av_log(avctx, AV_LOG_DEBUG,
842  "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
843  pps_id, pps->sps_id,
844  pps->cabac ? "CABAC" : "CAVLC",
845  pps->slice_group_count,
846  pps->ref_count[0], pps->ref_count[1],
847  pps->weighted_pred ? "weighted" : "",
848  pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
849  pps->deblocking_filter_parameters_present ? "LPAR" : "",
850  pps->constrained_intra_pred ? "CONSTR" : "",
851  pps->redundant_pic_cnt_present ? "REDU" : "",
852  pps->transform_8x8_mode ? "8x8DCT" : "");
853  }
854 
855  remove_pps(ps, pps_id);
856  ps->pps_list[pps_id] = pps_buf;
857 
858  return 0;
859 
860 fail:
861  av_buffer_unref(&pps_buf);
862  return ret;
863 }
int chroma_format_idc
Definition: h264_ps.h:48
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:724
static unsigned int show_bits1(GetBitContext *s)
Definition: get_bits.h:518
int video_signal_type_present_flag
Definition: h264_ps.h:74
static void remove_pps(H264ParamSets *s, int id)
Definition: h264_ps.c:88
#define NULL
Definition: coverity.c:32
#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:107
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:237
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:381
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int weighted_bipred_idc
Definition: h264_ps.h:117
int chroma_qp_index_offset[2]
Definition: h264_ps.h:120
AVBufferRef * sps_list[MAX_SPS_COUNT]
Definition: h264_ps.h:139
int scaling_matrix_present
Definition: h264_ps.h:87
uint8_t scaling_matrix4[6][16]
Definition: h264_ps.h:88
Sequence parameter set.
Definition: h264_ps.h:44
int bitstream_restriction_flag
Definition: h264_ps.h:85
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264_ps.h:115
int num
Numerator.
Definition: rational.h:59
const uint8_t * buffer
Definition: get_bits.h:62
Picture parameter set.
Definition: h264_ps.h:109
int frame_mbs_only_flag
Definition: h264_ps.h:62
const uint8_t ff_h264_quant_rem6[QP_MAX_NUM+1]
Definition: h264data.c:174
int chroma_qp_diff
Definition: h264_ps.h:128
uint32_t num_units_in_tick
Definition: h264_ps.h:81
int profile_idc
Definition: h264_ps.h:46
const char * av_color_space_name(enum AVColorSpace space)
Definition: pixdesc.c:2799
int profile_idc
Definition: h264_levels.c:52
unsigned int crop_top
frame_cropping_rect_top_offset
Definition: h264_ps.h:70
int fixed_frame_rate_flag
Definition: h264_ps.h:83
uint8_t scaling_matrix4[6][16]
Definition: h264_ps.h:125
int deblocking_filter_parameters_present
deblocking_filter_parameters_present_flag
Definition: h264_ps.h:121
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:145
uint8_t
int full_range
Definition: h264_ps.h:75
unsigned int crop_left
frame_cropping_rect_left_offset
Definition: h264_ps.h:68
int offset_for_non_ref_pic
Definition: h264_ps.h:54
int gaps_in_frame_num_allowed_flag
Definition: h264_ps.h:58
int bit_depth_chroma
bit_depth_chroma_minus8 + 8
Definition: h264_ps.h:99
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2614
enum AVColorPrimaries color_primaries
Definition: h264_ps.h:77
int cabac
entropy_coding_mode_flag
Definition: h264_ps.h:111
unsigned int crop_right
frame_cropping_rect_right_offset
Definition: h264_ps.h:69
int level_idc
Definition: h264_levels.c:25
uint32_t(*[6] dequant4_coeff)[16]
Definition: h264_ps.h:134
#define height
#define MAX_PPS_COUNT
Definition: h264_ps.h:38
int transform_bypass
qpprime_y_zero_transform_bypass_flag
Definition: h264_ps.h:49
uint32_t(*[6] dequant8_coeff)[64]
Definition: h264_ps.h:135
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
static const int level_max_dpb_mbs[][2]
Definition: h264_ps.c:69
int redundant_pic_cnt_present
redundant_pic_cnt_present_flag
Definition: h264_ps.h:123
#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:2170
#define av_log(a,...)
#define U(x)
Definition: vp56_arith.h:37
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:814
H.264 parameter set handling.
int mb_aff
mb_adaptive_frame_field_flag
Definition: h264_ps.h:63
enum AVColorTransferCharacteristic color_trc
Definition: h264_ps.h:78
AVBufferRef * sps_ref
Definition: h264_ps.h:143
#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:932
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:51
int constrained_intra_pred
constrained_intra_pred_flag
Definition: h264_ps.h:122
int num_reorder_frames
Definition: h264_ps.h:86
#define AVERROR(e)
Definition: error.h:43
int time_offset_length
Definition: h264_ps.h:93
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 weighted_pred
weighted_pred_flag
Definition: h264_ps.h:116
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:279
#define MIN_LOG2_MAX_FRAME_NUM
Definition: h264_ps.c:38
int residual_color_transform_flag
residual_colour_transform_flag
Definition: h264_ps.h:100
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:117
int delta_pic_order_always_zero_flag
Definition: h264_ps.h:53
int offset_for_top_to_bottom_field
Definition: h264_ps.h:55
const char * av_color_primaries_name(enum AVColorPrimaries primaries)
Definition: pixdesc.c:2751
static void remove_sps(H264ParamSets *s, int id)
Definition: h264_ps.c:93
static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:629
int crop
frame_cropping_flag
Definition: h264_ps.h:65
uint8_t scaling_matrix8[6][64]
Definition: h264_ps.h:126
size_t data_size
Definition: h264_ps.h:103
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:282
int ref_frame_count
num_ref_frames
Definition: h264_ps.h:57
int initial_cpb_removal_delay_length
initial_cpb_removal_delay_length_minus1 + 1
Definition: h264_ps.h:95
uint8_t data[4096]
Definition: h264_ps.h:129
#define FFMIN(a, b)
Definition: common.h:96
int poc_cycle_length
num_ref_frames_in_pic_order_cnt_cycle
Definition: h264_ps.h:56
int colour_description_present_flag
Definition: h264_ps.h:76
AVRational sar
Definition: h264_ps.h:73
#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:127
#define s(width, name)
Definition: cbs_vp9.c:257
int init_qp
pic_init_qp_minus26 + 26
Definition: h264_ps.h:118
int direct_8x8_inference_flag
Definition: h264_ps.h:64
uint8_t scaling_matrix8[6][64]
Definition: h264_ps.h:89
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:251
unsigned int sps_id
Definition: h264_ps.h:45
#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:103
#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:112
short offset_for_ref_frame[256]
Definition: h264_ps.h:84
static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
Definition: h264_ps.c:710
static int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx, SPS *sps)
Definition: h264_ps.c:133
int timing_info_present_flag
Definition: h264_ps.h:80
int vcl_hrd_parameters_present_flag
Definition: h264_ps.h:91
Libavcodec external API header.
#define MAX_DELAYED_PIC_COUNT
Definition: h264dec.h:56
AVBufferRef * pps_list[MAX_PPS_COUNT]
Definition: h264_ps.h:140
static int get_ue_golomb_31(GetBitContext *gb)
read unsigned exp golomb code, constraint to a max of 31.
Definition: golomb.h:118
int debug
debug
Definition: avcodec.h:2613
main external API structure.
Definition: avcodec.h:1532
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:97
uint8_t * data
The data buffer.
Definition: buffer.h:89
int vui_parameters_present_flag
Definition: h264_ps.h:72
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1557
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:656
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:101
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:487
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:460
static int FUNC() pps(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current)
int index
Definition: gxfenc.c:89
#define EXTENDED_SAR
Definition: h264_ps.c:40
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
#define FF_COMPLIANCE_STRICT
Strictly conform to all the things in the spec no matter what consequences.
Definition: avcodec.h:2593
const SPS * sps
Definition: h264_ps.h:146
unsigned int sps_id
Definition: h264_ps.h:110
int log2_max_poc_lsb
log2_max_pic_order_cnt_lsb_minus4
Definition: h264_ps.h:52
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:531
int size
Size of data in bytes.
Definition: buffer.h:93
uint32_t time_scale
Definition: h264_ps.h:82
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:124
#define SIZE_SPECIFIER
Definition: internal.h:262
int pic_struct_present_flag
Definition: h264_ps.h:92
const uint8_t ff_h264_dequant8_coeff_init[6][6]
Definition: h264data.c:165
#define MAX_LOG2_MAX_FRAME_NUM
Definition: h264_ps.h:39
A reference to a data buffer.
Definition: buffer.h:81
int mb_height
Definition: h264_ps.h:61
int init_qs
pic_init_qs_minus26 + 26
Definition: h264_ps.h:119
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:279
uint8_t data[4096]
Definition: h264_ps.h:102
AVBufferRef * pps_ref
Definition: h264_ps.h:142
int nal_hrd_parameters_present_flag
Definition: h264_ps.h:90
size_t data_size
Definition: h264_ps.h:130
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264_ps.h:50
const char * av_color_transfer_name(enum AVColorTransferCharacteristic transfer)
Definition: pixdesc.c:2775
const uint8_t * buffer_end
Definition: get_bits.h:62
static const uint8_t default_scaling4[2][16]
Definition: h264_ps.c:42
int den
Denominator.
Definition: rational.h:60
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:316
int bit_depth_luma
bit_depth_luma_minus8 + 8
Definition: h264_ps.h:98
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:333
int mb_width
pic_width_in_mbs_minus1 + 1
Definition: h264_ps.h:59
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1619
int slice_group_count
num_slice_groups_minus1 + 1
Definition: h264_ps.h:113
int cpb_cnt
See H.264 E.1.2.
Definition: h264_ps.h:94
uint32_t dequant4_buffer[6][QP_MAX_NUM+1][16]
Definition: h264_ps.h:132
static const uint8_t default_scaling8[2][64]
Definition: h264_ps.c:49
uint32_t dequant8_buffer[6][QP_MAX_NUM+1][64]
Definition: h264_ps.h:133
int cpb_removal_delay_length
cpb_removal_delay_length_minus1 + 1
Definition: h264_ps.h:96
static void init_dequant_tables(PPS *pps, const SPS *sps)
Definition: h264_ps.c:682
#define MKTAG(a, b, c, d)
Definition: common.h:366
unsigned int crop_bottom
frame_cropping_rect_bottom_offset
Definition: h264_ps.h:71
exp golomb vlc stuff
enum AVCodecID id
int level_idc
Definition: h264_ps.h:47
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2591
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:701
int mb_slice_group_map_type
Definition: h264_ps.h:114
enum AVColorSpace colorspace
Definition: h264_ps.h:79