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 Libav.
6  *
7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
28 #include "libavutil/imgutils.h"
29 #include "internal.h"
30 #include "dsputil.h"
31 #include "avcodec.h"
32 #include "h264.h"
33 #include "h264data.h" //FIXME FIXME FIXME (just for zigzag_scan)
34 #include "golomb.h"
35 
36 
37 //#undef NDEBUG
38 #include <assert.h>
39 
40 #define MAX_LOG2_MAX_FRAME_NUM (12 + 4)
41 #define MIN_LOG2_MAX_FRAME_NUM 4
42 
43 static const AVRational pixel_aspect[17]={
44  {0, 1},
45  {1, 1},
46  {12, 11},
47  {10, 11},
48  {16, 11},
49  {40, 33},
50  {24, 11},
51  {20, 11},
52  {32, 11},
53  {80, 33},
54  {18, 11},
55  {15, 11},
56  {64, 33},
57  {160,99},
58  {4, 3},
59  {3, 2},
60  {2, 1},
61 };
62 
63 #define QP(qP,depth) ( (qP)+6*((depth)-8) )
64 
65 #define CHROMA_QP_TABLE_END(d) \
66  QP(0,d), QP(1,d), QP(2,d), QP(3,d), QP(4,d), QP(5,d),\
67  QP(6,d), QP(7,d), QP(8,d), QP(9,d), QP(10,d), QP(11,d),\
68  QP(12,d), QP(13,d), QP(14,d), QP(15,d), QP(16,d), QP(17,d),\
69  QP(18,d), QP(19,d), QP(20,d), QP(21,d), QP(22,d), QP(23,d),\
70  QP(24,d), QP(25,d), QP(26,d), QP(27,d), QP(28,d), QP(29,d),\
71  QP(29,d), QP(30,d), QP(31,d), QP(32,d), QP(32,d), QP(33,d),\
72  QP(34,d), QP(34,d), QP(35,d), QP(35,d), QP(36,d), QP(36,d),\
73  QP(37,d), QP(37,d), QP(37,d), QP(38,d), QP(38,d), QP(38,d),\
74  QP(39,d), QP(39,d), QP(39,d), QP(39,d)
75 
76 const uint8_t ff_h264_chroma_qp[3][QP_MAX_NUM+1] = {
77  {
79  },
80  {
81  0, 1, 2, 3, 4, 5,
83  },
84  {
85  0, 1, 2, 3, 4, 5,
86  6, 7, 8, 9, 10, 11,
88  },
89 };
90 
91 static const uint8_t default_scaling4[2][16]={
92 { 6,13,20,28,
93  13,20,28,32,
94  20,28,32,37,
95  28,32,37,42
96 },{
97  10,14,20,24,
98  14,20,24,27,
99  20,24,27,30,
100  24,27,30,34
101 }};
102 
103 static const uint8_t default_scaling8[2][64]={
104 { 6,10,13,16,18,23,25,27,
105  10,11,16,18,23,25,27,29,
106  13,16,18,23,25,27,29,31,
107  16,18,23,25,27,29,31,33,
108  18,23,25,27,29,31,33,36,
109  23,25,27,29,31,33,36,38,
110  25,27,29,31,33,36,38,40,
111  27,29,31,33,36,38,40,42
112 },{
113  9,13,15,17,19,21,22,24,
114  13,13,17,19,21,22,24,25,
115  15,17,19,21,22,24,25,27,
116  17,19,21,22,24,25,27,28,
117  19,21,22,24,25,27,28,30,
118  21,22,24,25,27,28,30,32,
119  22,24,25,27,28,30,32,33,
120  24,25,27,28,30,32,33,35
121 }};
122 
123 static inline int decode_hrd_parameters(H264Context *h, SPS *sps){
124  MpegEncContext * const s = &h->s;
125  int cpb_count, i;
126  cpb_count = get_ue_golomb_31(&s->gb) + 1;
127 
128  if(cpb_count > 32U){
129  av_log(h->s.avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
130  return -1;
131  }
132 
133  get_bits(&s->gb, 4); /* bit_rate_scale */
134  get_bits(&s->gb, 4); /* cpb_size_scale */
135  for(i=0; i<cpb_count; i++){
136  get_ue_golomb_long(&s->gb); /* bit_rate_value_minus1 */
137  get_ue_golomb_long(&s->gb); /* cpb_size_value_minus1 */
138  get_bits1(&s->gb); /* cbr_flag */
139  }
140  sps->initial_cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
141  sps->cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
142  sps->dpb_output_delay_length = get_bits(&s->gb, 5) + 1;
143  sps->time_offset_length = get_bits(&s->gb, 5);
144  sps->cpb_cnt = cpb_count;
145  return 0;
146 }
147 
148 static inline int decode_vui_parameters(H264Context *h, SPS *sps){
149  MpegEncContext * const s = &h->s;
150  int aspect_ratio_info_present_flag;
151  unsigned int aspect_ratio_idc;
152 
153  aspect_ratio_info_present_flag= get_bits1(&s->gb);
154 
155  if( aspect_ratio_info_present_flag ) {
156  aspect_ratio_idc= get_bits(&s->gb, 8);
157  if( aspect_ratio_idc == EXTENDED_SAR ) {
158  sps->sar.num= get_bits(&s->gb, 16);
159  sps->sar.den= get_bits(&s->gb, 16);
160  }else if(aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)){
161  sps->sar= pixel_aspect[aspect_ratio_idc];
162  }else{
163  av_log(h->s.avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
164  return -1;
165  }
166  }else{
167  sps->sar.num=
168  sps->sar.den= 0;
169  }
170 // s->avctx->aspect_ratio= sar_width*s->width / (float)(s->height*sar_height);
171 
172  if(get_bits1(&s->gb)){ /* overscan_info_present_flag */
173  get_bits1(&s->gb); /* overscan_appropriate_flag */
174  }
175 
178  get_bits(&s->gb, 3); /* video_format */
179  sps->full_range = get_bits1(&s->gb); /* video_full_range_flag */
180 
183  sps->color_primaries = get_bits(&s->gb, 8); /* colour_primaries */
184  sps->color_trc = get_bits(&s->gb, 8); /* transfer_characteristics */
185  sps->colorspace = get_bits(&s->gb, 8); /* matrix_coefficients */
186  if (sps->color_primaries >= AVCOL_PRI_NB)
188  if (sps->color_trc >= AVCOL_TRC_NB)
190  if (sps->colorspace >= AVCOL_SPC_NB)
192  }
193  }
194 
195  if(get_bits1(&s->gb)){ /* chroma_location_info_present_flag */
196  s->avctx->chroma_sample_location = get_ue_golomb(&s->gb)+1; /* chroma_sample_location_type_top_field */
197  get_ue_golomb(&s->gb); /* chroma_sample_location_type_bottom_field */
198  }
199 
201  if(sps->timing_info_present_flag){
202  sps->num_units_in_tick = get_bits_long(&s->gb, 32);
203  sps->time_scale = get_bits_long(&s->gb, 32);
204  if(!sps->num_units_in_tick || !sps->time_scale){
205  av_log(h->s.avctx, AV_LOG_ERROR, "time_scale/num_units_in_tick invalid or unsupported (%d/%d)\n", sps->time_scale, sps->num_units_in_tick);
206  return -1;
207  }
208  sps->fixed_frame_rate_flag = get_bits1(&s->gb);
209  }
210 
213  if(decode_hrd_parameters(h, sps) < 0)
214  return -1;
217  if(decode_hrd_parameters(h, sps) < 0)
218  return -1;
220  get_bits1(&s->gb); /* low_delay_hrd_flag */
222 
225  get_bits1(&s->gb); /* motion_vectors_over_pic_boundaries_flag */
226  get_ue_golomb(&s->gb); /* max_bytes_per_pic_denom */
227  get_ue_golomb(&s->gb); /* max_bits_per_mb_denom */
228  get_ue_golomb(&s->gb); /* log2_max_mv_length_horizontal */
229  get_ue_golomb(&s->gb); /* log2_max_mv_length_vertical */
231  get_ue_golomb(&s->gb); /*max_dec_frame_buffering*/
232 
233  if (get_bits_left(&s->gb) < 0) {
234  sps->num_reorder_frames=0;
236  }
237 
238  if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
239  av_log(h->s.avctx, AV_LOG_ERROR, "Clipping illegal num_reorder_frames %d\n",
240  sps->num_reorder_frames);
241  sps->num_reorder_frames = 16;
242  return -1;
243  }
244  }
245  if (get_bits_left(&s->gb) < 0) {
246  av_log(h->s.avctx, AV_LOG_ERROR, "Overread VUI by %d bits\n", -get_bits_left(&s->gb));
247  return AVERROR_INVALIDDATA;
248  }
249 
250  return 0;
251 }
252 
253 static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
254  const uint8_t *jvt_list, const uint8_t *fallback_list){
255  MpegEncContext * const s = &h->s;
256  int i, last = 8, next = 8;
257  const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
258  if(!get_bits1(&s->gb)) /* matrix not written, we use the predicted one */
259  memcpy(factors, fallback_list, size*sizeof(uint8_t));
260  else
261  for(i=0;i<size;i++){
262  if(next)
263  next = (last + get_se_golomb(&s->gb)) & 0xff;
264  if(!i && !next){ /* matrix not written, we use the preset one */
265  memcpy(factors, jvt_list, size*sizeof(uint8_t));
266  break;
267  }
268  last = factors[scan[i]] = next ? next : last;
269  }
270 }
271 
272 static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
273  uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
274  MpegEncContext * const s = &h->s;
275  int fallback_sps = !is_sps && sps->scaling_matrix_present;
276  const uint8_t *fallback[4] = {
277  fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
278  fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
279  fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
280  fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
281  };
282  if(get_bits1(&s->gb)){
283  sps->scaling_matrix_present |= is_sps;
284  decode_scaling_list(h,scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
285  decode_scaling_list(h,scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
286  decode_scaling_list(h,scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
287  decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
288  decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
289  decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
290  if(is_sps || pps->transform_8x8_mode){
291  decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]); // Intra, Y
292  if(sps->chroma_format_idc == 3){
293  decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[0],scaling_matrix8[0]); // Intra, Cr
294  decode_scaling_list(h,scaling_matrix8[2],64,default_scaling8[0],scaling_matrix8[1]); // Intra, Cb
295  }
296  decode_scaling_list(h,scaling_matrix8[3],64,default_scaling8[1],fallback[3]); // Inter, Y
297  if(sps->chroma_format_idc == 3){
298  decode_scaling_list(h,scaling_matrix8[4],64,default_scaling8[1],scaling_matrix8[3]); // Inter, Cr
299  decode_scaling_list(h,scaling_matrix8[5],64,default_scaling8[1],scaling_matrix8[4]); // Inter, Cb
300  }
301  }
302  }
303 }
304 
306  MpegEncContext * const s = &h->s;
307  int profile_idc, level_idc, constraint_set_flags = 0;
308  unsigned int sps_id;
309  int i, log2_max_frame_num_minus4;
310  SPS *sps;
311 
312  profile_idc= get_bits(&s->gb, 8);
313  constraint_set_flags |= get_bits1(&s->gb) << 0; //constraint_set0_flag
314  constraint_set_flags |= get_bits1(&s->gb) << 1; //constraint_set1_flag
315  constraint_set_flags |= get_bits1(&s->gb) << 2; //constraint_set2_flag
316  constraint_set_flags |= get_bits1(&s->gb) << 3; //constraint_set3_flag
317  get_bits(&s->gb, 4); // reserved
318  level_idc= get_bits(&s->gb, 8);
319  sps_id= get_ue_golomb_31(&s->gb);
320 
321  if(sps_id >= MAX_SPS_COUNT) {
322  av_log(h->s.avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
323  return -1;
324  }
325  sps= av_mallocz(sizeof(SPS));
326  if(sps == NULL)
327  return -1;
328 
329  sps->time_offset_length = 24;
330  sps->profile_idc= profile_idc;
331  sps->constraint_set_flags = constraint_set_flags;
332  sps->level_idc= level_idc;
333 
334  memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
335  memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
336  sps->scaling_matrix_present = 0;
337 
338  if (sps->profile_idc == 100 || sps->profile_idc == 110 ||
339  sps->profile_idc == 122 || sps->profile_idc == 244 ||
340  sps->profile_idc == 44 || sps->profile_idc == 83 ||
341  sps->profile_idc == 86 || sps->profile_idc == 118 ||
342  sps->profile_idc == 128 || sps->profile_idc == 144) {
344  if(sps->chroma_format_idc > 3) {
345  av_log(h->s.avctx, AV_LOG_ERROR, "chroma_format_idc (%u) out of range\n", sps->chroma_format_idc);
346  return -1;
347  } else if(sps->chroma_format_idc == 3) {
349  }
350  sps->bit_depth_luma = get_ue_golomb(&s->gb) + 8;
351  sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8;
352  if (sps->bit_depth_chroma != sps->bit_depth_luma) {
354  "Different bit depth between chroma and luma", 1);
355  goto fail;
356  }
357  sps->transform_bypass = get_bits1(&s->gb);
359  }else{
360  sps->chroma_format_idc= 1;
361  sps->bit_depth_luma = 8;
362  sps->bit_depth_chroma = 8;
363  }
364 
365  log2_max_frame_num_minus4 = get_ue_golomb(&s->gb);
366  if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
367  log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
369  "log2_max_frame_num_minus4 out of range (0-12): %d\n",
370  log2_max_frame_num_minus4);
371  return AVERROR_INVALIDDATA;
372  }
373  sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
374 
375  sps->poc_type= get_ue_golomb_31(&s->gb);
376 
377  if(sps->poc_type == 0){ //FIXME #define
378  sps->log2_max_poc_lsb= get_ue_golomb(&s->gb) + 4;
379  } else if(sps->poc_type == 1){//FIXME #define
383  sps->poc_cycle_length = get_ue_golomb(&s->gb);
384 
385  if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
386  av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
387  goto fail;
388  }
389 
390  for(i=0; i<sps->poc_cycle_length; i++)
391  sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb);
392  }else if(sps->poc_type != 2){
393  av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
394  goto fail;
395  }
396 
398  if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count >= 32U){
399  av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
400  goto fail;
401  }
403  sps->mb_width = get_ue_golomb(&s->gb) + 1;
404  sps->mb_height= get_ue_golomb(&s->gb) + 1;
405  if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
406  av_image_check_size(16*sps->mb_width, 16*sps->mb_height, 0, h->s.avctx)){
407  av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
408  goto fail;
409  }
410 
411  sps->frame_mbs_only_flag= get_bits1(&s->gb);
412  if(!sps->frame_mbs_only_flag)
413  sps->mb_aff= get_bits1(&s->gb);
414  else
415  sps->mb_aff= 0;
416 
419  av_log(h->s.avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
420  goto fail;
421  }
422 
423 #ifndef ALLOW_INTERLACE
424  if(sps->mb_aff)
425  av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
426 #endif
427  sps->crop= get_bits1(&s->gb);
428  if(sps->crop){
429  int crop_vertical_limit = sps->chroma_format_idc & 2 ? 16 : 8;
430  int crop_horizontal_limit = sps->chroma_format_idc == 3 ? 16 : 8;
431  sps->crop_left = get_ue_golomb(&s->gb);
432  sps->crop_right = get_ue_golomb(&s->gb);
433  sps->crop_top = get_ue_golomb(&s->gb);
434  sps->crop_bottom= get_ue_golomb(&s->gb);
435  if(sps->crop_left || sps->crop_top){
436  av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
437  }
438  if(sps->crop_right >= crop_horizontal_limit || sps->crop_bottom >= crop_vertical_limit){
439  av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n");
440  }
441  }else{
442  sps->crop_left =
443  sps->crop_right =
444  sps->crop_top =
445  sps->crop_bottom= 0;
446  }
447 
449  if( sps->vui_parameters_present_flag )
450  if (decode_vui_parameters(h, sps) < 0)
451  goto fail;
452 
453  if(!sps->sar.den)
454  sps->sar.den= 1;
455 
457  av_log(h->s.avctx, AV_LOG_DEBUG, "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%d/%d/%d/%d %s %s %d/%d\n",
458  sps_id, sps->profile_idc, sps->level_idc,
459  sps->poc_type,
460  sps->ref_frame_count,
461  sps->mb_width, sps->mb_height,
462  sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
463  sps->direct_8x8_inference_flag ? "8B8" : "",
464  sps->crop_left, sps->crop_right,
465  sps->crop_top, sps->crop_bottom,
466  sps->vui_parameters_present_flag ? "VUI" : "",
467  ((const char*[]){"Gray","420","422","444"})[sps->chroma_format_idc],
469  sps->timing_info_present_flag ? sps->time_scale : 0
470  );
471  }
472  sps->new = 1;
473 
474  av_free(h->sps_buffers[sps_id]);
475  h->sps_buffers[sps_id] = sps;
476  h->sps = *sps;
477  h->current_sps_id = sps_id;
478 
479  return 0;
480 fail:
481  av_free(sps);
482  return -1;
483 }
484 
485 static void
486 build_qp_table(PPS *pps, int t, int index, const int depth)
487 {
488  int i;
489  const int max_qp = 51 + 6*(depth-8);
490  for(i = 0; i < max_qp+1; i++)
491  pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[depth-8][av_clip(i + index, 0, max_qp)];
492 }
493 
495  MpegEncContext * const s = &h->s;
496  unsigned int pps_id= get_ue_golomb(&s->gb);
497  PPS *pps;
498  const int qp_bd_offset = 6*(h->sps.bit_depth_luma-8);
499  int bits_left;
500 
501  if(pps_id >= MAX_PPS_COUNT) {
502  av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
503  return -1;
504  } else if (h->sps.bit_depth_luma > 10) {
505  av_log(h->s.avctx, AV_LOG_ERROR, "Unimplemented luma bit depth=%d (max=10)\n", h->sps.bit_depth_luma);
506  return AVERROR_PATCHWELCOME;
507  }
508 
509  pps= av_mallocz(sizeof(PPS));
510  if(pps == NULL)
511  return -1;
512  pps->sps_id= get_ue_golomb_31(&s->gb);
513  if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
514  av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
515  goto fail;
516  }
517 
518  pps->cabac= get_bits1(&s->gb);
519  pps->pic_order_present= get_bits1(&s->gb);
520  pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
521  if(pps->slice_group_count > 1 ){
523  av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
524  switch(pps->mb_slice_group_map_type){
525  case 0:
526 #if 0
527 | for( i = 0; i <= num_slice_groups_minus1; i++ ) | | |
528 | run_length[ i ] |1 |ue(v) |
529 #endif
530  break;
531  case 2:
532 #if 0
533 | for( i = 0; i < num_slice_groups_minus1; i++ ) | | |
534 |{ | | |
535 | top_left_mb[ i ] |1 |ue(v) |
536 | bottom_right_mb[ i ] |1 |ue(v) |
537 | } | | |
538 #endif
539  break;
540  case 3:
541  case 4:
542  case 5:
543 #if 0
544 | slice_group_change_direction_flag |1 |u(1) |
545 | slice_group_change_rate_minus1 |1 |ue(v) |
546 #endif
547  break;
548  case 6:
549 #if 0
550 | slice_group_id_cnt_minus1 |1 |ue(v) |
551 | for( i = 0; i <= slice_group_id_cnt_minus1; i++ | | |
552 |) | | |
553 | slice_group_id[ i ] |1 |u(v) |
554 #endif
555  break;
556  }
557  }
558  pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
559  pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
560  if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
561  av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
562  goto fail;
563  }
564 
565  pps->weighted_pred= get_bits1(&s->gb);
566  pps->weighted_bipred_idc= get_bits(&s->gb, 2);
567  pps->init_qp= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
568  pps->init_qs= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
573 
574  pps->transform_8x8_mode= 0;
575  h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
576  memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
577  memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
578 
579  bits_left = bit_length - get_bits_count(&s->gb);
580  if (bits_left && (bits_left > 8 ||
581  show_bits(&s->gb, bits_left) != 1 << (bits_left - 1))) {
582  pps->transform_8x8_mode= get_bits1(&s->gb);
584  pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
585  } else {
587  }
588 
591  if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
592  pps->chroma_qp_diff= 1;
593 
595  av_log(h->s.avctx, AV_LOG_DEBUG, "pps:%u sps:%u %s slice_groups:%d ref:%d/%d %s qp:%d/%d/%d/%d %s %s %s %s\n",
596  pps_id, pps->sps_id,
597  pps->cabac ? "CABAC" : "CAVLC",
598  pps->slice_group_count,
599  pps->ref_count[0], pps->ref_count[1],
600  pps->weighted_pred ? "weighted" : "",
601  pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
602  pps->deblocking_filter_parameters_present ? "LPAR" : "",
603  pps->constrained_intra_pred ? "CONSTR" : "",
604  pps->redundant_pic_cnt_present ? "REDU" : "",
605  pps->transform_8x8_mode ? "8x8DCT" : ""
606  );
607  }
608 
609  av_free(h->pps_buffers[pps_id]);
610  h->pps_buffers[pps_id]= pps;
611  return 0;
612 fail:
613  av_free(pps);
614  return -1;
615 }