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ffmpeg / libavcodec / h264_ps.c @ 1c3ce2cd

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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
 *
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 * This file is part of FFmpeg.
6
 *
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 * 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.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
/**
23
 * @file libavcodec/h264_ps.c
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 * H.264 / AVC / MPEG4 part10 parameter set decoding.
25
 * @author Michael Niedermayer <michaelni@gmx.at>
26
 */
27

    
28
#include "internal.h"
29
#include "dsputil.h"
30
#include "avcodec.h"
31
#include "h264.h"
32
#include "h264data.h" //FIXME FIXME FIXME (just for zigzag_scan)
33
#include "golomb.h"
34

    
35

    
36
//#undef NDEBUG
37
#include <assert.h>
38

    
39
static const AVRational pixel_aspect[17]={
40
 {0, 1},
41
 {1, 1},
42
 {12, 11},
43
 {10, 11},
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 {16, 11},
45
 {40, 33},
46
 {24, 11},
47
 {20, 11},
48
 {32, 11},
49
 {80, 33},
50
 {18, 11},
51
 {15, 11},
52
 {64, 33},
53
 {160,99},
54
 {4, 3},
55
 {3, 2},
56
 {2, 1},
57
};
58

    
59
const uint8_t ff_h264_chroma_qp[52]={
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    0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,
61
   12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,
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   28,29,29,30,31,32,32,33,34,34,35,35,36,36,37,37,
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   37,38,38,38,39,39,39,39
64
};
65

    
66
static const uint8_t default_scaling4[2][16]={
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{   6,13,20,28,
68
   13,20,28,32,
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   20,28,32,37,
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   28,32,37,42
71
},{
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   10,14,20,24,
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   14,20,24,27,
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   20,24,27,30,
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   24,27,30,34
76
}};
77

    
78
static const uint8_t default_scaling8[2][64]={
79
{   6,10,13,16,18,23,25,27,
80
   10,11,16,18,23,25,27,29,
81
   13,16,18,23,25,27,29,31,
82
   16,18,23,25,27,29,31,33,
83
   18,23,25,27,29,31,33,36,
84
   23,25,27,29,31,33,36,38,
85
   25,27,29,31,33,36,38,40,
86
   27,29,31,33,36,38,40,42
87
},{
88
    9,13,15,17,19,21,22,24,
89
   13,13,17,19,21,22,24,25,
90
   15,17,19,21,22,24,25,27,
91
   17,19,21,22,24,25,27,28,
92
   19,21,22,24,25,27,28,30,
93
   21,22,24,25,27,28,30,32,
94
   22,24,25,27,28,30,32,33,
95
   24,25,27,28,30,32,33,35
96
}};
97

    
98
static inline int decode_hrd_parameters(H264Context *h, SPS *sps){
99
    MpegEncContext * const s = &h->s;
100
    int cpb_count, i;
101
    cpb_count = get_ue_golomb_31(&s->gb) + 1;
102

    
103
    if(cpb_count > 32U){
104
        av_log(h->s.avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
105
        return -1;
106
    }
107

    
108
    get_bits(&s->gb, 4); /* bit_rate_scale */
109
    get_bits(&s->gb, 4); /* cpb_size_scale */
110
    for(i=0; i<cpb_count; i++){
111
        get_ue_golomb(&s->gb); /* bit_rate_value_minus1 */
112
        get_ue_golomb(&s->gb); /* cpb_size_value_minus1 */
113
        get_bits1(&s->gb);     /* cbr_flag */
114
    }
115
    sps->initial_cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
116
    sps->cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
117
    sps->dpb_output_delay_length = get_bits(&s->gb, 5) + 1;
118
    sps->time_offset_length = get_bits(&s->gb, 5);
119
    sps->cpb_cnt = cpb_count;
120
    return 0;
121
}
122

    
123
static inline int decode_vui_parameters(H264Context *h, SPS *sps){
124
    MpegEncContext * const s = &h->s;
125
    int aspect_ratio_info_present_flag;
126
    unsigned int aspect_ratio_idc;
127

    
128
    aspect_ratio_info_present_flag= get_bits1(&s->gb);
129

    
130
    if( aspect_ratio_info_present_flag ) {
131
        aspect_ratio_idc= get_bits(&s->gb, 8);
132
        if( aspect_ratio_idc == EXTENDED_SAR ) {
133
            sps->sar.num= get_bits(&s->gb, 16);
134
            sps->sar.den= get_bits(&s->gb, 16);
135
        }else if(aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)){
136
            sps->sar=  pixel_aspect[aspect_ratio_idc];
137
        }else{
138
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
139
            return -1;
140
        }
141
    }else{
142
        sps->sar.num=
143
        sps->sar.den= 0;
144
    }
145
//            s->avctx->aspect_ratio= sar_width*s->width / (float)(s->height*sar_height);
146

    
147
    if(get_bits1(&s->gb)){      /* overscan_info_present_flag */
148
        get_bits1(&s->gb);      /* overscan_appropriate_flag */
149
    }
150

    
151
    sps->video_signal_type_present_flag = get_bits1(&s->gb);
152
    if(sps->video_signal_type_present_flag){
153
        get_bits(&s->gb, 3);    /* video_format */
154
        sps->full_range = get_bits1(&s->gb); /* video_full_range_flag */
155

    
156
        sps->colour_description_present_flag = get_bits1(&s->gb);
157
        if(sps->colour_description_present_flag){
158
            sps->color_primaries = get_bits(&s->gb, 8); /* colour_primaries */
159
            sps->color_trc       = get_bits(&s->gb, 8); /* transfer_characteristics */
160
            sps->colorspace      = get_bits(&s->gb, 8); /* matrix_coefficients */
161
            if (sps->color_primaries >= AVCOL_PRI_NB)
162
                sps->color_primaries  = AVCOL_PRI_UNSPECIFIED;
163
            if (sps->color_trc >= AVCOL_TRC_NB)
164
                sps->color_trc  = AVCOL_TRC_UNSPECIFIED;
165
            if (sps->colorspace >= AVCOL_SPC_NB)
166
                sps->colorspace  = AVCOL_SPC_UNSPECIFIED;
167
        }
168
    }
169

    
170
    if(get_bits1(&s->gb)){      /* chroma_location_info_present_flag */
171
        s->avctx->chroma_sample_location = get_ue_golomb(&s->gb)+1;  /* chroma_sample_location_type_top_field */
172
        get_ue_golomb(&s->gb);  /* chroma_sample_location_type_bottom_field */
173
    }
174

    
175
    sps->timing_info_present_flag = get_bits1(&s->gb);
176
    if(sps->timing_info_present_flag){
177
        sps->num_units_in_tick = get_bits_long(&s->gb, 32);
178
        sps->time_scale = get_bits_long(&s->gb, 32);
179
        if(!sps->num_units_in_tick || !sps->time_scale){
180
            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);
181
            return -1;
182
        }
183
        sps->fixed_frame_rate_flag = get_bits1(&s->gb);
184
    }
185

    
186
    sps->nal_hrd_parameters_present_flag = get_bits1(&s->gb);
187
    if(sps->nal_hrd_parameters_present_flag)
188
        if(decode_hrd_parameters(h, sps) < 0)
189
            return -1;
190
    sps->vcl_hrd_parameters_present_flag = get_bits1(&s->gb);
191
    if(sps->vcl_hrd_parameters_present_flag)
192
        if(decode_hrd_parameters(h, sps) < 0)
193
            return -1;
194
    if(sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag)
195
        get_bits1(&s->gb);     /* low_delay_hrd_flag */
196
    sps->pic_struct_present_flag = get_bits1(&s->gb);
197

    
198
    sps->bitstream_restriction_flag = get_bits1(&s->gb);
199
    if(sps->bitstream_restriction_flag){
200
        get_bits1(&s->gb);     /* motion_vectors_over_pic_boundaries_flag */
201
        get_ue_golomb(&s->gb); /* max_bytes_per_pic_denom */
202
        get_ue_golomb(&s->gb); /* max_bits_per_mb_denom */
203
        get_ue_golomb(&s->gb); /* log2_max_mv_length_horizontal */
204
        get_ue_golomb(&s->gb); /* log2_max_mv_length_vertical */
205
        sps->num_reorder_frames= get_ue_golomb(&s->gb);
206
        get_ue_golomb(&s->gb); /*max_dec_frame_buffering*/
207

    
208
        if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
209
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
210
            return -1;
211
        }
212
    }
213

    
214
    return 0;
215
}
216

    
217
static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
218
                                const uint8_t *jvt_list, const uint8_t *fallback_list){
219
    MpegEncContext * const s = &h->s;
220
    int i, last = 8, next = 8;
221
    const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
222
    if(!get_bits1(&s->gb)) /* matrix not written, we use the predicted one */
223
        memcpy(factors, fallback_list, size*sizeof(uint8_t));
224
    else
225
    for(i=0;i<size;i++){
226
        if(next)
227
            next = (last + get_se_golomb(&s->gb)) & 0xff;
228
        if(!i && !next){ /* matrix not written, we use the preset one */
229
            memcpy(factors, jvt_list, size*sizeof(uint8_t));
230
            break;
231
        }
232
        last = factors[scan[i]] = next ? next : last;
233
    }
234
}
235

    
236
static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
237
                                   uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
238
    MpegEncContext * const s = &h->s;
239
    int fallback_sps = !is_sps && sps->scaling_matrix_present;
240
    const uint8_t *fallback[4] = {
241
        fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
242
        fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
243
        fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
244
        fallback_sps ? sps->scaling_matrix8[1] : default_scaling8[1]
245
    };
246
    if(get_bits1(&s->gb)){
247
        sps->scaling_matrix_present |= is_sps;
248
        decode_scaling_list(h,scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
249
        decode_scaling_list(h,scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
250
        decode_scaling_list(h,scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
251
        decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
252
        decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
253
        decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
254
        if(is_sps || pps->transform_8x8_mode){
255
            decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]);  // Intra, Y
256
            decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[1],fallback[3]);  // Inter, Y
257
        }
258
    }
259
}
260

    
261
int ff_h264_decode_seq_parameter_set(H264Context *h){
262
    MpegEncContext * const s = &h->s;
263
    int profile_idc, level_idc;
264
    unsigned int sps_id;
265
    int i;
266
    SPS *sps;
267

    
268
    profile_idc= get_bits(&s->gb, 8);
269
    get_bits1(&s->gb);   //constraint_set0_flag
270
    get_bits1(&s->gb);   //constraint_set1_flag
271
    get_bits1(&s->gb);   //constraint_set2_flag
272
    get_bits1(&s->gb);   //constraint_set3_flag
273
    get_bits(&s->gb, 4); // reserved
274
    level_idc= get_bits(&s->gb, 8);
275
    sps_id= get_ue_golomb_31(&s->gb);
276

    
277
    if(sps_id >= MAX_SPS_COUNT) {
278
        av_log(h->s.avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
279
        return -1;
280
    }
281
    sps= av_mallocz(sizeof(SPS));
282
    if(sps == NULL)
283
        return -1;
284

    
285
    sps->profile_idc= profile_idc;
286
    sps->level_idc= level_idc;
287

    
288
    memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
289
    memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
290
    sps->scaling_matrix_present = 0;
291

    
292
    if(sps->profile_idc >= 100){ //high profile
293
        sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
294
        if(sps->chroma_format_idc == 3)
295
            sps->residual_color_transform_flag = get_bits1(&s->gb);
296
        sps->bit_depth_luma   = get_ue_golomb(&s->gb) + 8;
297
        sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8;
298
        sps->transform_bypass = get_bits1(&s->gb);
299
        decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
300
    }else{
301
        sps->chroma_format_idc= 1;
302
        sps->bit_depth_luma   = 8;
303
        sps->bit_depth_chroma = 8;
304
    }
305

    
306
    sps->log2_max_frame_num= get_ue_golomb(&s->gb) + 4;
307
    sps->poc_type= get_ue_golomb_31(&s->gb);
308

    
309
    if(sps->poc_type == 0){ //FIXME #define
310
        sps->log2_max_poc_lsb= get_ue_golomb(&s->gb) + 4;
311
    } else if(sps->poc_type == 1){//FIXME #define
312
        sps->delta_pic_order_always_zero_flag= get_bits1(&s->gb);
313
        sps->offset_for_non_ref_pic= get_se_golomb(&s->gb);
314
        sps->offset_for_top_to_bottom_field= get_se_golomb(&s->gb);
315
        sps->poc_cycle_length                = get_ue_golomb(&s->gb);
316

    
317
        if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
318
            av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
319
            goto fail;
320
        }
321

    
322
        for(i=0; i<sps->poc_cycle_length; i++)
323
            sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb);
324
    }else if(sps->poc_type != 2){
325
        av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
326
        goto fail;
327
    }
328

    
329
    sps->ref_frame_count= get_ue_golomb_31(&s->gb);
330
    if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count >= 32U){
331
        av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
332
        goto fail;
333
    }
334
    sps->gaps_in_frame_num_allowed_flag= get_bits1(&s->gb);
335
    sps->mb_width = get_ue_golomb(&s->gb) + 1;
336
    sps->mb_height= get_ue_golomb(&s->gb) + 1;
337
    if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
338
       avcodec_check_dimensions(NULL, 16*sps->mb_width, 16*sps->mb_height)){
339
        av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
340
        goto fail;
341
    }
342

    
343
    sps->frame_mbs_only_flag= get_bits1(&s->gb);
344
    if(!sps->frame_mbs_only_flag)
345
        sps->mb_aff= get_bits1(&s->gb);
346
    else
347
        sps->mb_aff= 0;
348

    
349
    sps->direct_8x8_inference_flag= get_bits1(&s->gb);
350
    if(!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag){
351
        av_log(h->s.avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
352
        goto fail;
353
    }
354

    
355
#ifndef ALLOW_INTERLACE
356
    if(sps->mb_aff)
357
        av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
358
#endif
359
    sps->crop= get_bits1(&s->gb);
360
    if(sps->crop){
361
        sps->crop_left  = get_ue_golomb(&s->gb);
362
        sps->crop_right = get_ue_golomb(&s->gb);
363
        sps->crop_top   = get_ue_golomb(&s->gb);
364
        sps->crop_bottom= get_ue_golomb(&s->gb);
365
        if(sps->crop_left || sps->crop_top){
366
            av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
367
        }
368
        if(sps->crop_right >= 8 || sps->crop_bottom >= (8>> !sps->frame_mbs_only_flag)){
369
            av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n");
370
        }
371
    }else{
372
        sps->crop_left  =
373
        sps->crop_right =
374
        sps->crop_top   =
375
        sps->crop_bottom= 0;
376
    }
377

    
378
    sps->vui_parameters_present_flag= get_bits1(&s->gb);
379
    if( sps->vui_parameters_present_flag )
380
        if (decode_vui_parameters(h, sps) < 0)
381
            goto fail;
382

    
383
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
384
        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",
385
               sps_id, sps->profile_idc, sps->level_idc,
386
               sps->poc_type,
387
               sps->ref_frame_count,
388
               sps->mb_width, sps->mb_height,
389
               sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
390
               sps->direct_8x8_inference_flag ? "8B8" : "",
391
               sps->crop_left, sps->crop_right,
392
               sps->crop_top, sps->crop_bottom,
393
               sps->vui_parameters_present_flag ? "VUI" : "",
394
               ((const char*[]){"Gray","420","422","444"})[sps->chroma_format_idc],
395
               sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
396
               sps->timing_info_present_flag ? sps->time_scale : 0
397
               );
398
    }
399

    
400
    av_free(h->sps_buffers[sps_id]);
401
    h->sps_buffers[sps_id]= sps;
402
    h->sps = *sps;
403
    return 0;
404
fail:
405
    av_free(sps);
406
    return -1;
407
}
408

    
409
static void
410
build_qp_table(PPS *pps, int t, int index)
411
{
412
    int i;
413
    for(i = 0; i < 52; i++)
414
        pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[av_clip(i + index, 0, 51)];
415
}
416

    
417
int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
418
    MpegEncContext * const s = &h->s;
419
    unsigned int pps_id= get_ue_golomb(&s->gb);
420
    PPS *pps;
421

    
422
    if(pps_id >= MAX_PPS_COUNT) {
423
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
424
        return -1;
425
    }
426

    
427
    pps= av_mallocz(sizeof(PPS));
428
    if(pps == NULL)
429
        return -1;
430
    pps->sps_id= get_ue_golomb_31(&s->gb);
431
    if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
432
        av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
433
        goto fail;
434
    }
435

    
436
    pps->cabac= get_bits1(&s->gb);
437
    pps->pic_order_present= get_bits1(&s->gb);
438
    pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
439
    if(pps->slice_group_count > 1 ){
440
        pps->mb_slice_group_map_type= get_ue_golomb(&s->gb);
441
        av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
442
        switch(pps->mb_slice_group_map_type){
443
        case 0:
444
#if 0
445
|   for( i = 0; i <= num_slice_groups_minus1; i++ ) |   |        |
446
|    run_length[ i ]                                |1  |ue(v)   |
447
#endif
448
            break;
449
        case 2:
450
#if 0
451
|   for( i = 0; i < num_slice_groups_minus1; i++ )  |   |        |
452
|{                                                  |   |        |
453
|    top_left_mb[ i ]                               |1  |ue(v)   |
454
|    bottom_right_mb[ i ]                           |1  |ue(v)   |
455
|   }                                               |   |        |
456
#endif
457
            break;
458
        case 3:
459
        case 4:
460
        case 5:
461
#if 0
462
|   slice_group_change_direction_flag               |1  |u(1)    |
463
|   slice_group_change_rate_minus1                  |1  |ue(v)   |
464
#endif
465
            break;
466
        case 6:
467
#if 0
468
|   slice_group_id_cnt_minus1                       |1  |ue(v)   |
469
|   for( i = 0; i <= slice_group_id_cnt_minus1; i++ |   |        |
470
|)                                                  |   |        |
471
|    slice_group_id[ i ]                            |1  |u(v)    |
472
#endif
473
            break;
474
        }
475
    }
476
    pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
477
    pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
478
    if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
479
        av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
480
        goto fail;
481
    }
482

    
483
    pps->weighted_pred= get_bits1(&s->gb);
484
    pps->weighted_bipred_idc= get_bits(&s->gb, 2);
485
    pps->init_qp= get_se_golomb(&s->gb) + 26;
486
    pps->init_qs= get_se_golomb(&s->gb) + 26;
487
    pps->chroma_qp_index_offset[0]= get_se_golomb(&s->gb);
488
    pps->deblocking_filter_parameters_present= get_bits1(&s->gb);
489
    pps->constrained_intra_pred= get_bits1(&s->gb);
490
    pps->redundant_pic_cnt_present = get_bits1(&s->gb);
491

    
492
    pps->transform_8x8_mode= 0;
493
    h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
494
    memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
495
    memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
496

    
497
    if(get_bits_count(&s->gb) < bit_length){
498
        pps->transform_8x8_mode= get_bits1(&s->gb);
499
        decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
500
        pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
501
    } else {
502
        pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
503
    }
504

    
505
    build_qp_table(pps, 0, pps->chroma_qp_index_offset[0]);
506
    build_qp_table(pps, 1, pps->chroma_qp_index_offset[1]);
507
    if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
508
        pps->chroma_qp_diff= 1;
509

    
510
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
511
        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",
512
               pps_id, pps->sps_id,
513
               pps->cabac ? "CABAC" : "CAVLC",
514
               pps->slice_group_count,
515
               pps->ref_count[0], pps->ref_count[1],
516
               pps->weighted_pred ? "weighted" : "",
517
               pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
518
               pps->deblocking_filter_parameters_present ? "LPAR" : "",
519
               pps->constrained_intra_pred ? "CONSTR" : "",
520
               pps->redundant_pic_cnt_present ? "REDU" : "",
521
               pps->transform_8x8_mode ? "8x8DCT" : ""
522
               );
523
    }
524

    
525
    av_free(h->pps_buffers[pps_id]);
526
    h->pps_buffers[pps_id]= pps;
527
    return 0;
528
fail:
529
    av_free(pps);
530
    return -1;
531
}