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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>
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 *
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 * This file is part of FFmpeg.
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 *
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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
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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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 * FFmpeg 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 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
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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"
31
#include "avcodec.h"
32
#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
#define QP(qP,depth) ( (qP)+6*((depth)-8) )
61

    
62
#define CHROMA_QP_TABLE_END(d) \
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     QP(0,d),  QP(1,d),  QP(2,d),  QP(3,d),  QP(4,d),  QP(5,d),\
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     QP(6,d),  QP(7,d),  QP(8,d),  QP(9,d), QP(10,d), QP(11,d),\
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    QP(12,d), QP(13,d), QP(14,d), QP(15,d), QP(16,d), QP(17,d),\
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    QP(18,d), QP(19,d), QP(20,d), QP(21,d), QP(22,d), QP(23,d),\
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    QP(24,d), QP(25,d), QP(26,d), QP(27,d), QP(28,d), QP(29,d),\
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    QP(29,d), QP(30,d), QP(31,d), QP(32,d), QP(32,d), QP(33,d),\
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    QP(34,d), QP(34,d), QP(35,d), QP(35,d), QP(36,d), QP(36,d),\
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    QP(37,d), QP(37,d), QP(37,d), QP(38,d), QP(38,d), QP(38,d),\
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    QP(39,d), QP(39,d), QP(39,d), QP(39,d)
72

    
73
const uint8_t ff_h264_chroma_qp[3][QP_MAX_MAX+1] = {
74
    {
75
        CHROMA_QP_TABLE_END(8)
76
    },
77
    {
78
        0, 1, 2, 3, 4, 5,
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        CHROMA_QP_TABLE_END(9)
80
    },
81
    {
82
        0, 1, 2, 3,  4,  5,
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        6, 7, 8, 9, 10, 11,
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        CHROMA_QP_TABLE_END(10)
85
    },
86
};
87

    
88
static const uint8_t default_scaling4[2][16]={
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{   6,13,20,28,
90
   13,20,28,32,
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   20,28,32,37,
92
   28,32,37,42
93
},{
94
   10,14,20,24,
95
   14,20,24,27,
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   20,24,27,30,
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   24,27,30,34
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}};
99

    
100
static const uint8_t default_scaling8[2][64]={
101
{   6,10,13,16,18,23,25,27,
102
   10,11,16,18,23,25,27,29,
103
   13,16,18,23,25,27,29,31,
104
   16,18,23,25,27,29,31,33,
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   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
109
},{
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    9,13,15,17,19,21,22,24,
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   13,13,17,19,21,22,24,25,
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   15,17,19,21,22,24,25,27,
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   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,
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   22,24,25,27,28,30,32,33,
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   24,25,27,28,30,32,33,35
118
}};
119

    
120
static inline int decode_hrd_parameters(H264Context *h, SPS *sps){
121
    MpegEncContext * const s = &h->s;
122
    int cpb_count, i;
123
    cpb_count = get_ue_golomb_31(&s->gb) + 1;
124

    
125
    if(cpb_count > 32U){
126
        av_log(h->s.avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
127
        return -1;
128
    }
129

    
130
    get_bits(&s->gb, 4); /* bit_rate_scale */
131
    get_bits(&s->gb, 4); /* cpb_size_scale */
132
    for(i=0; i<cpb_count; i++){
133
        get_ue_golomb(&s->gb); /* bit_rate_value_minus1 */
134
        get_ue_golomb(&s->gb); /* cpb_size_value_minus1 */
135
        get_bits1(&s->gb);     /* cbr_flag */
136
    }
137
    sps->initial_cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
138
    sps->cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
139
    sps->dpb_output_delay_length = get_bits(&s->gb, 5) + 1;
140
    sps->time_offset_length = get_bits(&s->gb, 5);
141
    sps->cpb_cnt = cpb_count;
142
    return 0;
143
}
144

    
145
static inline int decode_vui_parameters(H264Context *h, SPS *sps){
146
    MpegEncContext * const s = &h->s;
147
    int aspect_ratio_info_present_flag;
148
    unsigned int aspect_ratio_idc;
149

    
150
    aspect_ratio_info_present_flag= get_bits1(&s->gb);
151

    
152
    if( aspect_ratio_info_present_flag ) {
153
        aspect_ratio_idc= get_bits(&s->gb, 8);
154
        if( aspect_ratio_idc == EXTENDED_SAR ) {
155
            sps->sar.num= get_bits(&s->gb, 16);
156
            sps->sar.den= get_bits(&s->gb, 16);
157
        }else if(aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)){
158
            sps->sar=  pixel_aspect[aspect_ratio_idc];
159
        }else{
160
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
161
            return -1;
162
        }
163
    }else{
164
        sps->sar.num=
165
        sps->sar.den= 0;
166
    }
167
//            s->avctx->aspect_ratio= sar_width*s->width / (float)(s->height*sar_height);
168

    
169
    if(get_bits1(&s->gb)){      /* overscan_info_present_flag */
170
        get_bits1(&s->gb);      /* overscan_appropriate_flag */
171
    }
172

    
173
    sps->video_signal_type_present_flag = get_bits1(&s->gb);
174
    if(sps->video_signal_type_present_flag){
175
        get_bits(&s->gb, 3);    /* video_format */
176
        sps->full_range = get_bits1(&s->gb); /* video_full_range_flag */
177

    
178
        sps->colour_description_present_flag = get_bits1(&s->gb);
179
        if(sps->colour_description_present_flag){
180
            sps->color_primaries = get_bits(&s->gb, 8); /* colour_primaries */
181
            sps->color_trc       = get_bits(&s->gb, 8); /* transfer_characteristics */
182
            sps->colorspace      = get_bits(&s->gb, 8); /* matrix_coefficients */
183
            if (sps->color_primaries >= AVCOL_PRI_NB)
184
                sps->color_primaries  = AVCOL_PRI_UNSPECIFIED;
185
            if (sps->color_trc >= AVCOL_TRC_NB)
186
                sps->color_trc  = AVCOL_TRC_UNSPECIFIED;
187
            if (sps->colorspace >= AVCOL_SPC_NB)
188
                sps->colorspace  = AVCOL_SPC_UNSPECIFIED;
189
        }
190
    }
191

    
192
    if(get_bits1(&s->gb)){      /* chroma_location_info_present_flag */
193
        s->avctx->chroma_sample_location = get_ue_golomb(&s->gb)+1;  /* chroma_sample_location_type_top_field */
194
        get_ue_golomb(&s->gb);  /* chroma_sample_location_type_bottom_field */
195
    }
196

    
197
    sps->timing_info_present_flag = get_bits1(&s->gb);
198
    if(sps->timing_info_present_flag){
199
        sps->num_units_in_tick = get_bits_long(&s->gb, 32);
200
        sps->time_scale = get_bits_long(&s->gb, 32);
201
        if(!sps->num_units_in_tick || !sps->time_scale){
202
            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);
203
            return -1;
204
        }
205
        sps->fixed_frame_rate_flag = get_bits1(&s->gb);
206
    }
207

    
208
    sps->nal_hrd_parameters_present_flag = get_bits1(&s->gb);
209
    if(sps->nal_hrd_parameters_present_flag)
210
        if(decode_hrd_parameters(h, sps) < 0)
211
            return -1;
212
    sps->vcl_hrd_parameters_present_flag = get_bits1(&s->gb);
213
    if(sps->vcl_hrd_parameters_present_flag)
214
        if(decode_hrd_parameters(h, sps) < 0)
215
            return -1;
216
    if(sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag)
217
        get_bits1(&s->gb);     /* low_delay_hrd_flag */
218
    sps->pic_struct_present_flag = get_bits1(&s->gb);
219

    
220
    sps->bitstream_restriction_flag = get_bits1(&s->gb);
221
    if(sps->bitstream_restriction_flag){
222
        get_bits1(&s->gb);     /* motion_vectors_over_pic_boundaries_flag */
223
        get_ue_golomb(&s->gb); /* max_bytes_per_pic_denom */
224
        get_ue_golomb(&s->gb); /* max_bits_per_mb_denom */
225
        get_ue_golomb(&s->gb); /* log2_max_mv_length_horizontal */
226
        get_ue_golomb(&s->gb); /* log2_max_mv_length_vertical */
227
        sps->num_reorder_frames= get_ue_golomb(&s->gb);
228
        get_ue_golomb(&s->gb); /*max_dec_frame_buffering*/
229

    
230
        if(s->gb.size_in_bits < get_bits_count(&s->gb)){
231
            av_log(h->s.avctx, AV_LOG_ERROR, "Overread VUI by %d bits\n", get_bits_count(&s->gb) - s->gb.size_in_bits);
232
            sps->num_reorder_frames=0;
233
            sps->bitstream_restriction_flag= 0;
234
        }
235

    
236
        if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
237
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
238
            return -1;
239
        }
240
    }
241

    
242
    return 0;
243
}
244

    
245
static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
246
                                const uint8_t *jvt_list, const uint8_t *fallback_list){
247
    MpegEncContext * const s = &h->s;
248
    int i, last = 8, next = 8;
249
    const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
250
    if(!get_bits1(&s->gb)) /* matrix not written, we use the predicted one */
251
        memcpy(factors, fallback_list, size*sizeof(uint8_t));
252
    else
253
    for(i=0;i<size;i++){
254
        if(next)
255
            next = (last + get_se_golomb(&s->gb)) & 0xff;
256
        if(!i && !next){ /* matrix not written, we use the preset one */
257
            memcpy(factors, jvt_list, size*sizeof(uint8_t));
258
            break;
259
        }
260
        last = factors[scan[i]] = next ? next : last;
261
    }
262
}
263

    
264
static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
265
                                   uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
266
    MpegEncContext * const s = &h->s;
267
    int fallback_sps = !is_sps && sps->scaling_matrix_present;
268
    const uint8_t *fallback[4] = {
269
        fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
270
        fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
271
        fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
272
        fallback_sps ? sps->scaling_matrix8[1] : default_scaling8[1]
273
    };
274
    if(get_bits1(&s->gb)){
275
        sps->scaling_matrix_present |= is_sps;
276
        decode_scaling_list(h,scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
277
        decode_scaling_list(h,scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
278
        decode_scaling_list(h,scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
279
        decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
280
        decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
281
        decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
282
        if(is_sps || pps->transform_8x8_mode){
283
            decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]);  // Intra, Y
284
            decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[1],fallback[3]);  // Inter, Y
285
        }
286
    }
287
}
288

    
289
int ff_h264_decode_seq_parameter_set(H264Context *h){
290
    MpegEncContext * const s = &h->s;
291
    int profile_idc, level_idc, constraint_set_flags = 0;
292
    unsigned int sps_id;
293
    int i;
294
    SPS *sps;
295

    
296
    profile_idc= get_bits(&s->gb, 8);
297
    constraint_set_flags |= get_bits1(&s->gb) << 0;   //constraint_set0_flag
298
    constraint_set_flags |= get_bits1(&s->gb) << 1;   //constraint_set1_flag
299
    constraint_set_flags |= get_bits1(&s->gb) << 2;   //constraint_set2_flag
300
    constraint_set_flags |= get_bits1(&s->gb) << 3;   //constraint_set3_flag
301
    get_bits(&s->gb, 4); // reserved
302
    level_idc= get_bits(&s->gb, 8);
303
    sps_id= get_ue_golomb_31(&s->gb);
304

    
305
    if(sps_id >= MAX_SPS_COUNT) {
306
        av_log(h->s.avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
307
        return -1;
308
    }
309
    sps= av_mallocz(sizeof(SPS));
310
    if(sps == NULL)
311
        return -1;
312

    
313
    sps->time_offset_length = 24;
314
    sps->profile_idc= profile_idc;
315
    sps->constraint_set_flags = constraint_set_flags;
316
    sps->level_idc= level_idc;
317

    
318
    memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
319
    memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
320
    sps->scaling_matrix_present = 0;
321

    
322
    if(sps->profile_idc >= 100){ //high profile
323
        sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
324
        if(sps->chroma_format_idc == 3)
325
            sps->residual_color_transform_flag = get_bits1(&s->gb);
326
        sps->bit_depth_luma   = get_ue_golomb(&s->gb) + 8;
327
        sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8;
328
        sps->transform_bypass = get_bits1(&s->gb);
329
        decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
330
    }else{
331
        sps->chroma_format_idc= 1;
332
        sps->bit_depth_luma   = 8;
333
        sps->bit_depth_chroma = 8;
334
    }
335

    
336
    sps->log2_max_frame_num= get_ue_golomb(&s->gb) + 4;
337
    sps->poc_type= get_ue_golomb_31(&s->gb);
338

    
339
    if(sps->poc_type == 0){ //FIXME #define
340
        sps->log2_max_poc_lsb= get_ue_golomb(&s->gb) + 4;
341
    } else if(sps->poc_type == 1){//FIXME #define
342
        sps->delta_pic_order_always_zero_flag= get_bits1(&s->gb);
343
        sps->offset_for_non_ref_pic= get_se_golomb(&s->gb);
344
        sps->offset_for_top_to_bottom_field= get_se_golomb(&s->gb);
345
        sps->poc_cycle_length                = get_ue_golomb(&s->gb);
346

    
347
        if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
348
            av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
349
            goto fail;
350
        }
351

    
352
        for(i=0; i<sps->poc_cycle_length; i++)
353
            sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb);
354
    }else if(sps->poc_type != 2){
355
        av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
356
        goto fail;
357
    }
358

    
359
    sps->ref_frame_count= get_ue_golomb_31(&s->gb);
360
    if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count >= 32U){
361
        av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
362
        goto fail;
363
    }
364
    sps->gaps_in_frame_num_allowed_flag= get_bits1(&s->gb);
365
    sps->mb_width = get_ue_golomb(&s->gb) + 1;
366
    sps->mb_height= get_ue_golomb(&s->gb) + 1;
367
    if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
368
       av_image_check_size(16*sps->mb_width, 16*sps->mb_height, 0, h->s.avctx)){
369
        av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
370
        goto fail;
371
    }
372

    
373
    sps->frame_mbs_only_flag= get_bits1(&s->gb);
374
    if(!sps->frame_mbs_only_flag)
375
        sps->mb_aff= get_bits1(&s->gb);
376
    else
377
        sps->mb_aff= 0;
378

    
379
    sps->direct_8x8_inference_flag= get_bits1(&s->gb);
380
    if(!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag){
381
        av_log(h->s.avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
382
        goto fail;
383
    }
384

    
385
#ifndef ALLOW_INTERLACE
386
    if(sps->mb_aff)
387
        av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
388
#endif
389
    sps->crop= get_bits1(&s->gb);
390
    if(sps->crop){
391
        sps->crop_left  = get_ue_golomb(&s->gb);
392
        sps->crop_right = get_ue_golomb(&s->gb);
393
        sps->crop_top   = get_ue_golomb(&s->gb);
394
        sps->crop_bottom= get_ue_golomb(&s->gb);
395
        if(sps->crop_left || sps->crop_top){
396
            av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
397
        }
398
        if(sps->crop_right >= 8 || sps->crop_bottom >= 8){
399
            av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n");
400
        }
401
    }else{
402
        sps->crop_left  =
403
        sps->crop_right =
404
        sps->crop_top   =
405
        sps->crop_bottom= 0;
406
    }
407

    
408
    sps->vui_parameters_present_flag= get_bits1(&s->gb);
409
    if( sps->vui_parameters_present_flag )
410
        if (decode_vui_parameters(h, sps) < 0)
411
            goto fail;
412

    
413
    if(!sps->sar.den)
414
        sps->sar.den= 1;
415

    
416
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
417
        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",
418
               sps_id, sps->profile_idc, sps->level_idc,
419
               sps->poc_type,
420
               sps->ref_frame_count,
421
               sps->mb_width, sps->mb_height,
422
               sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
423
               sps->direct_8x8_inference_flag ? "8B8" : "",
424
               sps->crop_left, sps->crop_right,
425
               sps->crop_top, sps->crop_bottom,
426
               sps->vui_parameters_present_flag ? "VUI" : "",
427
               ((const char*[]){"Gray","420","422","444"})[sps->chroma_format_idc],
428
               sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
429
               sps->timing_info_present_flag ? sps->time_scale : 0
430
               );
431
    }
432

    
433
    av_free(h->sps_buffers[sps_id]);
434
    h->sps_buffers[sps_id]= sps;
435
    h->sps = *sps;
436
    return 0;
437
fail:
438
    av_free(sps);
439
    return -1;
440
}
441

    
442
static void
443
build_qp_table(PPS *pps, int t, int index, const int depth)
444
{
445
    int i;
446
    const int max_qp = 51 + 6*(depth-8);
447
    for(i = 0; i < max_qp+1; i++)
448
        pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[depth-8][av_clip(i + index, 0, max_qp)];
449
}
450

    
451
int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
452
    MpegEncContext * const s = &h->s;
453
    unsigned int pps_id= get_ue_golomb(&s->gb);
454
    PPS *pps;
455
    const int qp_bd_offset = 6*(h->sps.bit_depth_luma-8);
456

    
457
    if(pps_id >= MAX_PPS_COUNT) {
458
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
459
        return -1;
460
    }
461

    
462
    pps= av_mallocz(sizeof(PPS));
463
    if(pps == NULL)
464
        return -1;
465
    pps->sps_id= get_ue_golomb_31(&s->gb);
466
    if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
467
        av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
468
        goto fail;
469
    }
470

    
471
    pps->cabac= get_bits1(&s->gb);
472
    pps->pic_order_present= get_bits1(&s->gb);
473
    pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
474
    if(pps->slice_group_count > 1 ){
475
        pps->mb_slice_group_map_type= get_ue_golomb(&s->gb);
476
        av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
477
        switch(pps->mb_slice_group_map_type){
478
        case 0:
479
#if 0
480
|   for( i = 0; i <= num_slice_groups_minus1; i++ ) |   |        |
481
|    run_length[ i ]                                |1  |ue(v)   |
482
#endif
483
            break;
484
        case 2:
485
#if 0
486
|   for( i = 0; i < num_slice_groups_minus1; i++ )  |   |        |
487
|{                                                  |   |        |
488
|    top_left_mb[ i ]                               |1  |ue(v)   |
489
|    bottom_right_mb[ i ]                           |1  |ue(v)   |
490
|   }                                               |   |        |
491
#endif
492
            break;
493
        case 3:
494
        case 4:
495
        case 5:
496
#if 0
497
|   slice_group_change_direction_flag               |1  |u(1)    |
498
|   slice_group_change_rate_minus1                  |1  |ue(v)   |
499
#endif
500
            break;
501
        case 6:
502
#if 0
503
|   slice_group_id_cnt_minus1                       |1  |ue(v)   |
504
|   for( i = 0; i <= slice_group_id_cnt_minus1; i++ |   |        |
505
|)                                                  |   |        |
506
|    slice_group_id[ i ]                            |1  |u(v)    |
507
#endif
508
            break;
509
        }
510
    }
511
    pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
512
    pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
513
    if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
514
        av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
515
        goto fail;
516
    }
517

    
518
    pps->weighted_pred= get_bits1(&s->gb);
519
    pps->weighted_bipred_idc= get_bits(&s->gb, 2);
520
    pps->init_qp= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
521
    pps->init_qs= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
522
    pps->chroma_qp_index_offset[0]= get_se_golomb(&s->gb);
523
    pps->deblocking_filter_parameters_present= get_bits1(&s->gb);
524
    pps->constrained_intra_pred= get_bits1(&s->gb);
525
    pps->redundant_pic_cnt_present = get_bits1(&s->gb);
526

    
527
    pps->transform_8x8_mode= 0;
528
    h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
529
    memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
530
    memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
531

    
532
    if(get_bits_count(&s->gb) < bit_length){
533
        pps->transform_8x8_mode= get_bits1(&s->gb);
534
        decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
535
        pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
536
    } else {
537
        pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
538
    }
539

    
540
    build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], h->sps.bit_depth_luma);
541
    build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], h->sps.bit_depth_luma);
542
    if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
543
        pps->chroma_qp_diff= 1;
544

    
545
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
546
        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",
547
               pps_id, pps->sps_id,
548
               pps->cabac ? "CABAC" : "CAVLC",
549
               pps->slice_group_count,
550
               pps->ref_count[0], pps->ref_count[1],
551
               pps->weighted_pred ? "weighted" : "",
552
               pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
553
               pps->deblocking_filter_parameters_present ? "LPAR" : "",
554
               pps->constrained_intra_pred ? "CONSTR" : "",
555
               pps->redundant_pic_cnt_present ? "REDU" : "",
556
               pps->transform_8x8_mode ? "8x8DCT" : ""
557
               );
558
    }
559

    
560
    av_free(h->pps_buffers[pps_id]);
561
    h->pps_buffers[pps_id]= pps;
562
    return 0;
563
fail:
564
    av_free(pps);
565
    return -1;
566
}