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1
/*
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 * 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 Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * 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 Libav; 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
/**
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 * @file
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 * H.264 / AVC / MPEG4 part10 parameter set decoding.
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 * @author Michael Niedermayer <michaelni@gmx.at>
26
 */
27

    
28
#include "libavutil/imgutils.h"
29
#include "internal.h"
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#include "dsputil.h"
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#include "avcodec.h"
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#include "h264.h"
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#include "h264data.h" //FIXME FIXME FIXME (just for zigzag_scan)
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#include "golomb.h"
35

    
36

    
37
//#undef NDEBUG
38
#include <assert.h>
39

    
40
static const AVRational pixel_aspect[17]={
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 {0, 1},
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 {1, 1},
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 {12, 11},
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 {10, 11},
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 {16, 11},
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 {40, 33},
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 {24, 11},
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 {20, 11},
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 {32, 11},
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 {80, 33},
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 {18, 11},
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 {15, 11},
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 {64, 33},
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 {160,99},
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 {4, 3},
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 {3, 2},
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 {2, 1},
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};
59

    
60
const uint8_t ff_h264_chroma_qp[52]={
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    0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,
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   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
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};
66

    
67
static const uint8_t default_scaling4[2][16]={
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{   6,13,20,28,
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   13,20,28,32,
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   20,28,32,37,
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   28,32,37,42
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},{
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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
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}};
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,
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   23,25,27,29,31,33,36,38,
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   25,27,29,31,33,36,38,40,
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   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,
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   15,17,19,21,22,24,25,27,
92
   17,19,21,22,24,25,27,28,
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   19,21,22,24,25,27,28,30,
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   21,22,24,25,27,28,30,32,
95
   22,24,25,27,28,30,32,33,
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   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 */
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        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, constraint_set_flags = 0;
271
    unsigned int sps_id;
272
    int i;
273
    SPS *sps;
274

    
275
    profile_idc= get_bits(&s->gb, 8);
276
    constraint_set_flags |= get_bits1(&s->gb) << 0;   //constraint_set0_flag
277
    constraint_set_flags |= get_bits1(&s->gb) << 1;   //constraint_set1_flag
278
    constraint_set_flags |= get_bits1(&s->gb) << 2;   //constraint_set2_flag
279
    constraint_set_flags |= get_bits1(&s->gb) << 3;   //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->time_offset_length = 24;
293
    sps->profile_idc= profile_idc;
294
    sps->constraint_set_flags = constraint_set_flags;
295
    sps->level_idc= level_idc;
296

    
297
    memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
298
    memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
299
    sps->scaling_matrix_present = 0;
300

    
301
    if(sps->profile_idc >= 100){ //high profile
302
        sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
303
        if(sps->chroma_format_idc == 3)
304
            sps->residual_color_transform_flag = get_bits1(&s->gb);
305
        sps->bit_depth_luma   = get_ue_golomb(&s->gb) + 8;
306
        sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8;
307
        sps->transform_bypass = get_bits1(&s->gb);
308
        decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
309
    }else{
310
        sps->chroma_format_idc= 1;
311
        sps->bit_depth_luma   = 8;
312
        sps->bit_depth_chroma = 8;
313
    }
314

    
315
    sps->log2_max_frame_num= get_ue_golomb(&s->gb) + 4;
316
    sps->poc_type= get_ue_golomb_31(&s->gb);
317

    
318
    if(sps->poc_type == 0){ //FIXME #define
319
        sps->log2_max_poc_lsb= get_ue_golomb(&s->gb) + 4;
320
    } else if(sps->poc_type == 1){//FIXME #define
321
        sps->delta_pic_order_always_zero_flag= get_bits1(&s->gb);
322
        sps->offset_for_non_ref_pic= get_se_golomb(&s->gb);
323
        sps->offset_for_top_to_bottom_field= get_se_golomb(&s->gb);
324
        sps->poc_cycle_length                = get_ue_golomb(&s->gb);
325

    
326
        if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
327
            av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
328
            goto fail;
329
        }
330

    
331
        for(i=0; i<sps->poc_cycle_length; i++)
332
            sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb);
333
    }else if(sps->poc_type != 2){
334
        av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
335
        goto fail;
336
    }
337

    
338
    sps->ref_frame_count= get_ue_golomb_31(&s->gb);
339
    if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count >= 32U){
340
        av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
341
        goto fail;
342
    }
343
    sps->gaps_in_frame_num_allowed_flag= get_bits1(&s->gb);
344
    sps->mb_width = get_ue_golomb(&s->gb) + 1;
345
    sps->mb_height= get_ue_golomb(&s->gb) + 1;
346
    if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
347
       av_image_check_size(16*sps->mb_width, 16*sps->mb_height, 0, h->s.avctx)){
348
        av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
349
        goto fail;
350
    }
351

    
352
    sps->frame_mbs_only_flag= get_bits1(&s->gb);
353
    if(!sps->frame_mbs_only_flag)
354
        sps->mb_aff= get_bits1(&s->gb);
355
    else
356
        sps->mb_aff= 0;
357

    
358
    sps->direct_8x8_inference_flag= get_bits1(&s->gb);
359
    if(!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag){
360
        av_log(h->s.avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
361
        goto fail;
362
    }
363

    
364
#ifndef ALLOW_INTERLACE
365
    if(sps->mb_aff)
366
        av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
367
#endif
368
    sps->crop= get_bits1(&s->gb);
369
    if(sps->crop){
370
        sps->crop_left  = get_ue_golomb(&s->gb);
371
        sps->crop_right = get_ue_golomb(&s->gb);
372
        sps->crop_top   = get_ue_golomb(&s->gb);
373
        sps->crop_bottom= get_ue_golomb(&s->gb);
374
        if(sps->crop_left || sps->crop_top){
375
            av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
376
        }
377
        if(sps->crop_right >= 8 || sps->crop_bottom >= 8){
378
            av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n");
379
        }
380
    }else{
381
        sps->crop_left  =
382
        sps->crop_right =
383
        sps->crop_top   =
384
        sps->crop_bottom= 0;
385
    }
386

    
387
    sps->vui_parameters_present_flag= get_bits1(&s->gb);
388
    if( sps->vui_parameters_present_flag )
389
        if (decode_vui_parameters(h, sps) < 0)
390
            goto fail;
391

    
392
    if(!sps->sar.den)
393
        sps->sar.den= 1;
394

    
395
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
396
        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",
397
               sps_id, sps->profile_idc, sps->level_idc,
398
               sps->poc_type,
399
               sps->ref_frame_count,
400
               sps->mb_width, sps->mb_height,
401
               sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
402
               sps->direct_8x8_inference_flag ? "8B8" : "",
403
               sps->crop_left, sps->crop_right,
404
               sps->crop_top, sps->crop_bottom,
405
               sps->vui_parameters_present_flag ? "VUI" : "",
406
               ((const char*[]){"Gray","420","422","444"})[sps->chroma_format_idc],
407
               sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
408
               sps->timing_info_present_flag ? sps->time_scale : 0
409
               );
410
    }
411

    
412
    av_free(h->sps_buffers[sps_id]);
413
    h->sps_buffers[sps_id]= sps;
414
    h->sps = *sps;
415
    return 0;
416
fail:
417
    av_free(sps);
418
    return -1;
419
}
420

    
421
static void
422
build_qp_table(PPS *pps, int t, int index)
423
{
424
    int i;
425
    for(i = 0; i < 52; i++)
426
        pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[av_clip(i + index, 0, 51)];
427
}
428

    
429
int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
430
    MpegEncContext * const s = &h->s;
431
    unsigned int pps_id= get_ue_golomb(&s->gb);
432
    PPS *pps;
433

    
434
    if(pps_id >= MAX_PPS_COUNT) {
435
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
436
        return -1;
437
    }
438

    
439
    pps= av_mallocz(sizeof(PPS));
440
    if(pps == NULL)
441
        return -1;
442
    pps->sps_id= get_ue_golomb_31(&s->gb);
443
    if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
444
        av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
445
        goto fail;
446
    }
447

    
448
    pps->cabac= get_bits1(&s->gb);
449
    pps->pic_order_present= get_bits1(&s->gb);
450
    pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
451
    if(pps->slice_group_count > 1 ){
452
        pps->mb_slice_group_map_type= get_ue_golomb(&s->gb);
453
        av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
454
        switch(pps->mb_slice_group_map_type){
455
        case 0:
456
#if 0
457
|   for( i = 0; i <= num_slice_groups_minus1; i++ ) |   |        |
458
|    run_length[ i ]                                |1  |ue(v)   |
459
#endif
460
            break;
461
        case 2:
462
#if 0
463
|   for( i = 0; i < num_slice_groups_minus1; i++ )  |   |        |
464
|{                                                  |   |        |
465
|    top_left_mb[ i ]                               |1  |ue(v)   |
466
|    bottom_right_mb[ i ]                           |1  |ue(v)   |
467
|   }                                               |   |        |
468
#endif
469
            break;
470
        case 3:
471
        case 4:
472
        case 5:
473
#if 0
474
|   slice_group_change_direction_flag               |1  |u(1)    |
475
|   slice_group_change_rate_minus1                  |1  |ue(v)   |
476
#endif
477
            break;
478
        case 6:
479
#if 0
480
|   slice_group_id_cnt_minus1                       |1  |ue(v)   |
481
|   for( i = 0; i <= slice_group_id_cnt_minus1; i++ |   |        |
482
|)                                                  |   |        |
483
|    slice_group_id[ i ]                            |1  |u(v)    |
484
#endif
485
            break;
486
        }
487
    }
488
    pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
489
    pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
490
    if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
491
        av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
492
        goto fail;
493
    }
494

    
495
    pps->weighted_pred= get_bits1(&s->gb);
496
    pps->weighted_bipred_idc= get_bits(&s->gb, 2);
497
    pps->init_qp= get_se_golomb(&s->gb) + 26;
498
    pps->init_qs= get_se_golomb(&s->gb) + 26;
499
    pps->chroma_qp_index_offset[0]= get_se_golomb(&s->gb);
500
    pps->deblocking_filter_parameters_present= get_bits1(&s->gb);
501
    pps->constrained_intra_pred= get_bits1(&s->gb);
502
    pps->redundant_pic_cnt_present = get_bits1(&s->gb);
503

    
504
    pps->transform_8x8_mode= 0;
505
    h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
506
    memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
507
    memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
508

    
509
    if(get_bits_count(&s->gb) < bit_length){
510
        pps->transform_8x8_mode= get_bits1(&s->gb);
511
        decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
512
        pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
513
    } else {
514
        pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
515
    }
516

    
517
    build_qp_table(pps, 0, pps->chroma_qp_index_offset[0]);
518
    build_qp_table(pps, 1, pps->chroma_qp_index_offset[1]);
519
    if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
520
        pps->chroma_qp_diff= 1;
521

    
522
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
523
        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",
524
               pps_id, pps->sps_id,
525
               pps->cabac ? "CABAC" : "CAVLC",
526
               pps->slice_group_count,
527
               pps->ref_count[0], pps->ref_count[1],
528
               pps->weighted_pred ? "weighted" : "",
529
               pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
530
               pps->deblocking_filter_parameters_present ? "LPAR" : "",
531
               pps->constrained_intra_pred ? "CONSTR" : "",
532
               pps->redundant_pic_cnt_present ? "REDU" : "",
533
               pps->transform_8x8_mode ? "8x8DCT" : ""
534
               );
535
    }
536

    
537
    av_free(h->pps_buffers[pps_id]);
538
    h->pps_buffers[pps_id]= pps;
539
    return 0;
540
fail:
541
    av_free(pps);
542
    return -1;
543
}