Use new imgutils.h API names, fix deprecation warnings.
[ffmpeg.git] / libavcodec / h264_ps.c
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 / MPEG4 part10 parameter set decoding.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27
28 #include "libavcore/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 static const AVRational pixel_aspect[17]={
41  {0, 1},
42  {1, 1},
43  {12, 11},
44  {10, 11},
45  {16, 11},
46  {40, 33},
47  {24, 11},
48  {20, 11},
49  {32, 11},
50  {80, 33},
51  {18, 11},
52  {15, 11},
53  {64, 33},
54  {160,99},
55  {4, 3},
56  {3, 2},
57  {2, 1},
58 };
59
60 const uint8_t ff_h264_chroma_qp[52]={
61     0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,
62    12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,
63    28,29,29,30,31,32,32,33,34,34,35,35,36,36,37,37,
64    37,38,38,38,39,39,39,39
65 };
66
67 static const uint8_t default_scaling4[2][16]={
68 {   6,13,20,28,
69    13,20,28,32,
70    20,28,32,37,
71    28,32,37,42
72 },{
73    10,14,20,24,
74    14,20,24,27,
75    20,24,27,30,
76    24,27,30,34
77 }};
78
79 static const uint8_t default_scaling8[2][64]={
80 {   6,10,13,16,18,23,25,27,
81    10,11,16,18,23,25,27,29,
82    13,16,18,23,25,27,29,31,
83    16,18,23,25,27,29,31,33,
84    18,23,25,27,29,31,33,36,
85    23,25,27,29,31,33,36,38,
86    25,27,29,31,33,36,38,40,
87    27,29,31,33,36,38,40,42
88 },{
89     9,13,15,17,19,21,22,24,
90    13,13,17,19,21,22,24,25,
91    15,17,19,21,22,24,25,27,
92    17,19,21,22,24,25,27,28,
93    19,21,22,24,25,27,28,30,
94    21,22,24,25,27,28,30,32,
95    22,24,25,27,28,30,32,33,
96    24,25,27,28,30,32,33,35
97 }};
98
99 static inline int decode_hrd_parameters(H264Context *h, SPS *sps){
100     MpegEncContext * const s = &h->s;
101     int cpb_count, i;
102     cpb_count = get_ue_golomb_31(&s->gb) + 1;
103
104     if(cpb_count > 32U){
105         av_log(h->s.avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
106         return -1;
107     }
108
109     get_bits(&s->gb, 4); /* bit_rate_scale */
110     get_bits(&s->gb, 4); /* cpb_size_scale */
111     for(i=0; i<cpb_count; i++){
112         get_ue_golomb(&s->gb); /* bit_rate_value_minus1 */
113         get_ue_golomb(&s->gb); /* cpb_size_value_minus1 */
114         get_bits1(&s->gb);     /* cbr_flag */
115     }
116     sps->initial_cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
117     sps->cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
118     sps->dpb_output_delay_length = get_bits(&s->gb, 5) + 1;
119     sps->time_offset_length = get_bits(&s->gb, 5);
120     sps->cpb_cnt = cpb_count;
121     return 0;
122 }
123
124 static inline int decode_vui_parameters(H264Context *h, SPS *sps){
125     MpegEncContext * const s = &h->s;
126     int aspect_ratio_info_present_flag;
127     unsigned int aspect_ratio_idc;
128
129     aspect_ratio_info_present_flag= get_bits1(&s->gb);
130
131     if( aspect_ratio_info_present_flag ) {
132         aspect_ratio_idc= get_bits(&s->gb, 8);
133         if( aspect_ratio_idc == EXTENDED_SAR ) {
134             sps->sar.num= get_bits(&s->gb, 16);
135             sps->sar.den= get_bits(&s->gb, 16);
136         }else if(aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)){
137             sps->sar=  pixel_aspect[aspect_ratio_idc];
138         }else{
139             av_log(h->s.avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
140             return -1;
141         }
142     }else{
143         sps->sar.num=
144         sps->sar.den= 0;
145     }
146 //            s->avctx->aspect_ratio= sar_width*s->width / (float)(s->height*sar_height);
147
148     if(get_bits1(&s->gb)){      /* overscan_info_present_flag */
149         get_bits1(&s->gb);      /* overscan_appropriate_flag */
150     }
151
152     sps->video_signal_type_present_flag = get_bits1(&s->gb);
153     if(sps->video_signal_type_present_flag){
154         get_bits(&s->gb, 3);    /* video_format */
155         sps->full_range = get_bits1(&s->gb); /* video_full_range_flag */
156
157         sps->colour_description_present_flag = get_bits1(&s->gb);
158         if(sps->colour_description_present_flag){
159             sps->color_primaries = get_bits(&s->gb, 8); /* colour_primaries */
160             sps->color_trc       = get_bits(&s->gb, 8); /* transfer_characteristics */
161             sps->colorspace      = get_bits(&s->gb, 8); /* matrix_coefficients */
162             if (sps->color_primaries >= AVCOL_PRI_NB)
163                 sps->color_primaries  = AVCOL_PRI_UNSPECIFIED;
164             if (sps->color_trc >= AVCOL_TRC_NB)
165                 sps->color_trc  = AVCOL_TRC_UNSPECIFIED;
166             if (sps->colorspace >= AVCOL_SPC_NB)
167                 sps->colorspace  = AVCOL_SPC_UNSPECIFIED;
168         }
169     }
170
171     if(get_bits1(&s->gb)){      /* chroma_location_info_present_flag */
172         s->avctx->chroma_sample_location = get_ue_golomb(&s->gb)+1;  /* chroma_sample_location_type_top_field */
173         get_ue_golomb(&s->gb);  /* chroma_sample_location_type_bottom_field */
174     }
175
176     sps->timing_info_present_flag = get_bits1(&s->gb);
177     if(sps->timing_info_present_flag){
178         sps->num_units_in_tick = get_bits_long(&s->gb, 32);
179         sps->time_scale = get_bits_long(&s->gb, 32);
180         if(!sps->num_units_in_tick || !sps->time_scale){
181             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);
182             return -1;
183         }
184         sps->fixed_frame_rate_flag = get_bits1(&s->gb);
185     }
186
187     sps->nal_hrd_parameters_present_flag = get_bits1(&s->gb);
188     if(sps->nal_hrd_parameters_present_flag)
189         if(decode_hrd_parameters(h, sps) < 0)
190             return -1;
191     sps->vcl_hrd_parameters_present_flag = get_bits1(&s->gb);
192     if(sps->vcl_hrd_parameters_present_flag)
193         if(decode_hrd_parameters(h, sps) < 0)
194             return -1;
195     if(sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag)
196         get_bits1(&s->gb);     /* low_delay_hrd_flag */
197     sps->pic_struct_present_flag = get_bits1(&s->gb);
198
199     sps->bitstream_restriction_flag = get_bits1(&s->gb);
200     if(sps->bitstream_restriction_flag){
201         get_bits1(&s->gb);     /* motion_vectors_over_pic_boundaries_flag */
202         get_ue_golomb(&s->gb); /* max_bytes_per_pic_denom */
203         get_ue_golomb(&s->gb); /* max_bits_per_mb_denom */
204         get_ue_golomb(&s->gb); /* log2_max_mv_length_horizontal */
205         get_ue_golomb(&s->gb); /* log2_max_mv_length_vertical */
206         sps->num_reorder_frames= get_ue_golomb(&s->gb);
207         get_ue_golomb(&s->gb); /*max_dec_frame_buffering*/
208
209         if(s->gb.size_in_bits < get_bits_count(&s->gb)){
210             av_log(h->s.avctx, AV_LOG_ERROR, "Overread VUI by %d bits\n", get_bits_count(&s->gb) - s->gb.size_in_bits);
211             sps->num_reorder_frames=0;
212             sps->bitstream_restriction_flag= 0;
213         }
214
215         if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
216             av_log(h->s.avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
217             return -1;
218         }
219     }
220
221     return 0;
222 }
223
224 static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
225                                 const uint8_t *jvt_list, const uint8_t *fallback_list){
226     MpegEncContext * const s = &h->s;
227     int i, last = 8, next = 8;
228     const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
229     if(!get_bits1(&s->gb)) /* matrix not written, we use the predicted one */
230         memcpy(factors, fallback_list, size*sizeof(uint8_t));
231     else
232     for(i=0;i<size;i++){
233         if(next)
234             next = (last + get_se_golomb(&s->gb)) & 0xff;
235         if(!i && !next){ /* matrix not written, we use the preset one */
236             memcpy(factors, jvt_list, size*sizeof(uint8_t));
237             break;
238         }
239         last = factors[scan[i]] = next ? next : last;
240     }
241 }
242
243 static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
244                                    uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
245     MpegEncContext * const s = &h->s;
246     int fallback_sps = !is_sps && sps->scaling_matrix_present;
247     const uint8_t *fallback[4] = {
248         fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
249         fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
250         fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
251         fallback_sps ? sps->scaling_matrix8[1] : default_scaling8[1]
252     };
253     if(get_bits1(&s->gb)){
254         sps->scaling_matrix_present |= is_sps;
255         decode_scaling_list(h,scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
256         decode_scaling_list(h,scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
257         decode_scaling_list(h,scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
258         decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
259         decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
260         decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
261         if(is_sps || pps->transform_8x8_mode){
262             decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]);  // Intra, Y
263             decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[1],fallback[3]);  // Inter, Y
264         }
265     }
266 }
267
268 int ff_h264_decode_seq_parameter_set(H264Context *h){
269     MpegEncContext * const s = &h->s;
270     int profile_idc, level_idc;
271     unsigned int sps_id;
272     int i;
273     SPS *sps;
274
275     profile_idc= get_bits(&s->gb, 8);
276     get_bits1(&s->gb);   //constraint_set0_flag
277     get_bits1(&s->gb);   //constraint_set1_flag
278     get_bits1(&s->gb);   //constraint_set2_flag
279     get_bits1(&s->gb);   //constraint_set3_flag
280     get_bits(&s->gb, 4); // reserved
281     level_idc= get_bits(&s->gb, 8);
282     sps_id= get_ue_golomb_31(&s->gb);
283
284     if(sps_id >= MAX_SPS_COUNT) {
285         av_log(h->s.avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
286         return -1;
287     }
288     sps= av_mallocz(sizeof(SPS));
289     if(sps == NULL)
290         return -1;
291
292     sps->profile_idc= profile_idc;
293     sps->level_idc= level_idc;
294
295     memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
296     memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
297     sps->scaling_matrix_present = 0;
298
299     if(sps->profile_idc >= 100){ //high profile
300         sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
301         if(sps->chroma_format_idc == 3)
302             sps->residual_color_transform_flag = get_bits1(&s->gb);
303         sps->bit_depth_luma   = get_ue_golomb(&s->gb) + 8;
304         sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8;
305         sps->transform_bypass = get_bits1(&s->gb);
306         decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
307     }else{
308         sps->chroma_format_idc= 1;
309         sps->bit_depth_luma   = 8;
310         sps->bit_depth_chroma = 8;
311     }
312
313     sps->log2_max_frame_num= get_ue_golomb(&s->gb) + 4;
314     sps->poc_type= get_ue_golomb_31(&s->gb);
315
316     if(sps->poc_type == 0){ //FIXME #define
317         sps->log2_max_poc_lsb= get_ue_golomb(&s->gb) + 4;
318     } else if(sps->poc_type == 1){//FIXME #define
319         sps->delta_pic_order_always_zero_flag= get_bits1(&s->gb);
320         sps->offset_for_non_ref_pic= get_se_golomb(&s->gb);
321         sps->offset_for_top_to_bottom_field= get_se_golomb(&s->gb);
322         sps->poc_cycle_length                = get_ue_golomb(&s->gb);
323
324         if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
325             av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
326             goto fail;
327         }
328
329         for(i=0; i<sps->poc_cycle_length; i++)
330             sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb);
331     }else if(sps->poc_type != 2){
332         av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
333         goto fail;
334     }
335
336     sps->ref_frame_count= get_ue_golomb_31(&s->gb);
337     if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count >= 32U){
338         av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
339         goto fail;
340     }
341     sps->gaps_in_frame_num_allowed_flag= get_bits1(&s->gb);
342     sps->mb_width = get_ue_golomb(&s->gb) + 1;
343     sps->mb_height= get_ue_golomb(&s->gb) + 1;
344     if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
345        av_image_check_size(16*sps->mb_width, 16*sps->mb_height, 0, h->s.avctx)){
346         av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
347         goto fail;
348     }
349
350     sps->frame_mbs_only_flag= get_bits1(&s->gb);
351     if(!sps->frame_mbs_only_flag)
352         sps->mb_aff= get_bits1(&s->gb);
353     else
354         sps->mb_aff= 0;
355
356     sps->direct_8x8_inference_flag= get_bits1(&s->gb);
357     if(!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag){
358         av_log(h->s.avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
359         goto fail;
360     }
361
362 #ifndef ALLOW_INTERLACE
363     if(sps->mb_aff)
364         av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
365 #endif
366     sps->crop= get_bits1(&s->gb);
367     if(sps->crop){
368         sps->crop_left  = get_ue_golomb(&s->gb);
369         sps->crop_right = get_ue_golomb(&s->gb);
370         sps->crop_top   = get_ue_golomb(&s->gb);
371         sps->crop_bottom= get_ue_golomb(&s->gb);
372         if(sps->crop_left || sps->crop_top){
373             av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
374         }
375         if(sps->crop_right >= 8 || sps->crop_bottom >= (8>> !sps->frame_mbs_only_flag)){
376             av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n");
377         }
378     }else{
379         sps->crop_left  =
380         sps->crop_right =
381         sps->crop_top   =
382         sps->crop_bottom= 0;
383     }
384
385     sps->vui_parameters_present_flag= get_bits1(&s->gb);
386     if( sps->vui_parameters_present_flag )
387         if (decode_vui_parameters(h, sps) < 0)
388             goto fail;
389
390     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
391         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",
392                sps_id, sps->profile_idc, sps->level_idc,
393                sps->poc_type,
394                sps->ref_frame_count,
395                sps->mb_width, sps->mb_height,
396                sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
397                sps->direct_8x8_inference_flag ? "8B8" : "",
398                sps->crop_left, sps->crop_right,
399                sps->crop_top, sps->crop_bottom,
400                sps->vui_parameters_present_flag ? "VUI" : "",
401                ((const char*[]){"Gray","420","422","444"})[sps->chroma_format_idc],
402                sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
403                sps->timing_info_present_flag ? sps->time_scale : 0
404                );
405     }
406
407     av_free(h->sps_buffers[sps_id]);
408     h->sps_buffers[sps_id]= sps;
409     h->sps = *sps;
410     return 0;
411 fail:
412     av_free(sps);
413     return -1;
414 }
415
416 static void
417 build_qp_table(PPS *pps, int t, int index)
418 {
419     int i;
420     for(i = 0; i < 52; i++)
421         pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[av_clip(i + index, 0, 51)];
422 }
423
424 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
425     MpegEncContext * const s = &h->s;
426     unsigned int pps_id= get_ue_golomb(&s->gb);
427     PPS *pps;
428
429     if(pps_id >= MAX_PPS_COUNT) {
430         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
431         return -1;
432     }
433
434     pps= av_mallocz(sizeof(PPS));
435     if(pps == NULL)
436         return -1;
437     pps->sps_id= get_ue_golomb_31(&s->gb);
438     if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
439         av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
440         goto fail;
441     }
442
443     pps->cabac= get_bits1(&s->gb);
444     pps->pic_order_present= get_bits1(&s->gb);
445     pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
446     if(pps->slice_group_count > 1 ){
447         pps->mb_slice_group_map_type= get_ue_golomb(&s->gb);
448         av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
449         switch(pps->mb_slice_group_map_type){
450         case 0:
451 #if 0
452 |   for( i = 0; i <= num_slice_groups_minus1; i++ ) |   |        |
453 |    run_length[ i ]                                |1  |ue(v)   |
454 #endif
455             break;
456         case 2:
457 #if 0
458 |   for( i = 0; i < num_slice_groups_minus1; i++ )  |   |        |
459 |{                                                  |   |        |
460 |    top_left_mb[ i ]                               |1  |ue(v)   |
461 |    bottom_right_mb[ i ]                           |1  |ue(v)   |
462 |   }                                               |   |        |
463 #endif
464             break;
465         case 3:
466         case 4:
467         case 5:
468 #if 0
469 |   slice_group_change_direction_flag               |1  |u(1)    |
470 |   slice_group_change_rate_minus1                  |1  |ue(v)   |
471 #endif
472             break;
473         case 6:
474 #if 0
475 |   slice_group_id_cnt_minus1                       |1  |ue(v)   |
476 |   for( i = 0; i <= slice_group_id_cnt_minus1; i++ |   |        |
477 |)                                                  |   |        |
478 |    slice_group_id[ i ]                            |1  |u(v)    |
479 #endif
480             break;
481         }
482     }
483     pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
484     pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
485     if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
486         av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
487         goto fail;
488     }
489
490     pps->weighted_pred= get_bits1(&s->gb);
491     pps->weighted_bipred_idc= get_bits(&s->gb, 2);
492     pps->init_qp= get_se_golomb(&s->gb) + 26;
493     pps->init_qs= get_se_golomb(&s->gb) + 26;
494     pps->chroma_qp_index_offset[0]= get_se_golomb(&s->gb);
495     pps->deblocking_filter_parameters_present= get_bits1(&s->gb);
496     pps->constrained_intra_pred= get_bits1(&s->gb);
497     pps->redundant_pic_cnt_present = get_bits1(&s->gb);
498
499     pps->transform_8x8_mode= 0;
500     h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
501     memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
502     memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
503
504     if(get_bits_count(&s->gb) < bit_length){
505         pps->transform_8x8_mode= get_bits1(&s->gb);
506         decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
507         pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
508     } else {
509         pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
510     }
511
512     build_qp_table(pps, 0, pps->chroma_qp_index_offset[0]);
513     build_qp_table(pps, 1, pps->chroma_qp_index_offset[1]);
514     if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
515         pps->chroma_qp_diff= 1;
516
517     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
518         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",
519                pps_id, pps->sps_id,
520                pps->cabac ? "CABAC" : "CAVLC",
521                pps->slice_group_count,
522                pps->ref_count[0], pps->ref_count[1],
523                pps->weighted_pred ? "weighted" : "",
524                pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
525                pps->deblocking_filter_parameters_present ? "LPAR" : "",
526                pps->constrained_intra_pred ? "CONSTR" : "",
527                pps->redundant_pic_cnt_present ? "REDU" : "",
528                pps->transform_8x8_mode ? "8x8DCT" : ""
529                );
530     }
531
532     av_free(h->pps_buffers[pps_id]);
533     h->pps_buffers[pps_id]= pps;
534     return 0;
535 fail:
536     av_free(pps);
537     return -1;
538 }