H.264: fix 4:4:4 cropping warning
[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 Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 /**
23  * @file
24  * H.264 / AVC / MPEG4 part10 parameter set decoding.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27
28 #include "libavutil/imgutils.h"
29 #include "internal.h"
30 #include "dsputil.h"
31 #include "avcodec.h"
32 #include "h264.h"
33 #include "h264data.h" //FIXME FIXME FIXME (just for zigzag_scan)
34 #include "golomb.h"
35
36
37 //#undef NDEBUG
38 #include <assert.h>
39
40 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 #define QP(qP,depth) ( (qP)+6*((depth)-8) )
61
62 #define CHROMA_QP_TABLE_END(d) \
63      QP(0,d),  QP(1,d),  QP(2,d),  QP(3,d),  QP(4,d),  QP(5,d),\
64      QP(6,d),  QP(7,d),  QP(8,d),  QP(9,d), QP(10,d), QP(11,d),\
65     QP(12,d), QP(13,d), QP(14,d), QP(15,d), QP(16,d), QP(17,d),\
66     QP(18,d), QP(19,d), QP(20,d), QP(21,d), QP(22,d), QP(23,d),\
67     QP(24,d), QP(25,d), QP(26,d), QP(27,d), QP(28,d), QP(29,d),\
68     QP(29,d), QP(30,d), QP(31,d), QP(32,d), QP(32,d), QP(33,d),\
69     QP(34,d), QP(34,d), QP(35,d), QP(35,d), QP(36,d), QP(36,d),\
70     QP(37,d), QP(37,d), QP(37,d), QP(38,d), QP(38,d), QP(38,d),\
71     QP(39,d), QP(39,d), QP(39,d), QP(39,d)
72
73 const uint8_t ff_h264_chroma_qp[3][QP_MAX_NUM+1] = {
74     {
75         CHROMA_QP_TABLE_END(8)
76     },
77     {
78         0, 1, 2, 3, 4, 5,
79         CHROMA_QP_TABLE_END(9)
80     },
81     {
82         0, 1, 2, 3,  4,  5,
83         6, 7, 8, 9, 10, 11,
84         CHROMA_QP_TABLE_END(10)
85     },
86 };
87
88 static const uint8_t default_scaling4[2][16]={
89 {   6,13,20,28,
90    13,20,28,32,
91    20,28,32,37,
92    28,32,37,42
93 },{
94    10,14,20,24,
95    14,20,24,27,
96    20,24,27,30,
97    24,27,30,34
98 }};
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,
105    18,23,25,27,29,31,33,36,
106    23,25,27,29,31,33,36,38,
107    25,27,29,31,33,36,38,40,
108    27,29,31,33,36,38,40,42
109 },{
110     9,13,15,17,19,21,22,24,
111    13,13,17,19,21,22,24,25,
112    15,17,19,21,22,24,25,27,
113    17,19,21,22,24,25,27,28,
114    19,21,22,24,25,27,28,30,
115    21,22,24,25,27,28,30,32,
116    22,24,25,27,28,30,32,33,
117    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[3] : 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             if(sps->chroma_format_idc == 3){
285                 decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[0],scaling_matrix8[0]);  // Intra, Cr
286                 decode_scaling_list(h,scaling_matrix8[2],64,default_scaling8[0],scaling_matrix8[1]);  // Intra, Cb
287             }
288             decode_scaling_list(h,scaling_matrix8[3],64,default_scaling8[1],fallback[3]);  // Inter, Y
289             if(sps->chroma_format_idc == 3){
290                 decode_scaling_list(h,scaling_matrix8[4],64,default_scaling8[1],scaling_matrix8[3]);  // Inter, Cr
291                 decode_scaling_list(h,scaling_matrix8[5],64,default_scaling8[1],scaling_matrix8[4]);  // Inter, Cb
292             }
293         }
294     }
295 }
296
297 int ff_h264_decode_seq_parameter_set(H264Context *h){
298     MpegEncContext * const s = &h->s;
299     int profile_idc, level_idc, constraint_set_flags = 0;
300     unsigned int sps_id;
301     int i;
302     SPS *sps;
303
304     profile_idc= get_bits(&s->gb, 8);
305     constraint_set_flags |= get_bits1(&s->gb) << 0;   //constraint_set0_flag
306     constraint_set_flags |= get_bits1(&s->gb) << 1;   //constraint_set1_flag
307     constraint_set_flags |= get_bits1(&s->gb) << 2;   //constraint_set2_flag
308     constraint_set_flags |= get_bits1(&s->gb) << 3;   //constraint_set3_flag
309     get_bits(&s->gb, 4); // reserved
310     level_idc= get_bits(&s->gb, 8);
311     sps_id= get_ue_golomb_31(&s->gb);
312
313     if(sps_id >= MAX_SPS_COUNT) {
314         av_log(h->s.avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
315         return -1;
316     }
317     sps= av_mallocz(sizeof(SPS));
318     if(sps == NULL)
319         return -1;
320
321     sps->time_offset_length = 24;
322     sps->profile_idc= profile_idc;
323     sps->constraint_set_flags = constraint_set_flags;
324     sps->level_idc= level_idc;
325
326     memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
327     memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
328     sps->scaling_matrix_present = 0;
329
330     if(sps->profile_idc >= 100){ //high profile
331         sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
332         if(sps->chroma_format_idc == 3)
333             sps->residual_color_transform_flag = get_bits1(&s->gb);
334         sps->bit_depth_luma   = get_ue_golomb(&s->gb) + 8;
335         sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8;
336         sps->transform_bypass = get_bits1(&s->gb);
337         decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
338     }else{
339         sps->chroma_format_idc= 1;
340         sps->bit_depth_luma   = 8;
341         sps->bit_depth_chroma = 8;
342     }
343
344     sps->log2_max_frame_num= get_ue_golomb(&s->gb) + 4;
345     sps->poc_type= get_ue_golomb_31(&s->gb);
346
347     if(sps->poc_type == 0){ //FIXME #define
348         sps->log2_max_poc_lsb= get_ue_golomb(&s->gb) + 4;
349     } else if(sps->poc_type == 1){//FIXME #define
350         sps->delta_pic_order_always_zero_flag= get_bits1(&s->gb);
351         sps->offset_for_non_ref_pic= get_se_golomb(&s->gb);
352         sps->offset_for_top_to_bottom_field= get_se_golomb(&s->gb);
353         sps->poc_cycle_length                = get_ue_golomb(&s->gb);
354
355         if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
356             av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
357             goto fail;
358         }
359
360         for(i=0; i<sps->poc_cycle_length; i++)
361             sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb);
362     }else if(sps->poc_type != 2){
363         av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
364         goto fail;
365     }
366
367     sps->ref_frame_count= get_ue_golomb_31(&s->gb);
368     if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count >= 32U){
369         av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
370         goto fail;
371     }
372     sps->gaps_in_frame_num_allowed_flag= get_bits1(&s->gb);
373     sps->mb_width = get_ue_golomb(&s->gb) + 1;
374     sps->mb_height= get_ue_golomb(&s->gb) + 1;
375     if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
376        av_image_check_size(16*sps->mb_width, 16*sps->mb_height, 0, h->s.avctx)){
377         av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
378         goto fail;
379     }
380
381     sps->frame_mbs_only_flag= get_bits1(&s->gb);
382     if(!sps->frame_mbs_only_flag)
383         sps->mb_aff= get_bits1(&s->gb);
384     else
385         sps->mb_aff= 0;
386
387     sps->direct_8x8_inference_flag= get_bits1(&s->gb);
388     if(!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag){
389         av_log(h->s.avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
390         goto fail;
391     }
392
393 #ifndef ALLOW_INTERLACE
394     if(sps->mb_aff)
395         av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
396 #endif
397     sps->crop= get_bits1(&s->gb);
398     if(sps->crop){
399         int crop_limit = sps->chroma_format_idc == 3 ? 16 : 8;
400         sps->crop_left  = get_ue_golomb(&s->gb);
401         sps->crop_right = get_ue_golomb(&s->gb);
402         sps->crop_top   = get_ue_golomb(&s->gb);
403         sps->crop_bottom= get_ue_golomb(&s->gb);
404         if(sps->crop_left || sps->crop_top){
405             av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
406         }
407         if(sps->crop_right >= crop_limit || sps->crop_bottom >= crop_limit){
408             av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n");
409         }
410     }else{
411         sps->crop_left  =
412         sps->crop_right =
413         sps->crop_top   =
414         sps->crop_bottom= 0;
415     }
416
417     sps->vui_parameters_present_flag= get_bits1(&s->gb);
418     if( sps->vui_parameters_present_flag )
419         if (decode_vui_parameters(h, sps) < 0)
420             goto fail;
421
422     if(!sps->sar.den)
423         sps->sar.den= 1;
424
425     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
426         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",
427                sps_id, sps->profile_idc, sps->level_idc,
428                sps->poc_type,
429                sps->ref_frame_count,
430                sps->mb_width, sps->mb_height,
431                sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
432                sps->direct_8x8_inference_flag ? "8B8" : "",
433                sps->crop_left, sps->crop_right,
434                sps->crop_top, sps->crop_bottom,
435                sps->vui_parameters_present_flag ? "VUI" : "",
436                ((const char*[]){"Gray","420","422","444"})[sps->chroma_format_idc],
437                sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
438                sps->timing_info_present_flag ? sps->time_scale : 0
439                );
440     }
441
442     av_free(h->sps_buffers[sps_id]);
443     h->sps_buffers[sps_id]= sps;
444     h->sps = *sps;
445     return 0;
446 fail:
447     av_free(sps);
448     return -1;
449 }
450
451 static void
452 build_qp_table(PPS *pps, int t, int index, const int depth)
453 {
454     int i;
455     const int max_qp = 51 + 6*(depth-8);
456     for(i = 0; i < max_qp+1; i++)
457         pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[depth-8][av_clip(i + index, 0, max_qp)];
458 }
459
460 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
461     MpegEncContext * const s = &h->s;
462     unsigned int pps_id= get_ue_golomb(&s->gb);
463     PPS *pps;
464     const int qp_bd_offset = 6*(h->sps.bit_depth_luma-8);
465
466     if(pps_id >= MAX_PPS_COUNT) {
467         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
468         return -1;
469     }
470
471     pps= av_mallocz(sizeof(PPS));
472     if(pps == NULL)
473         return -1;
474     pps->sps_id= get_ue_golomb_31(&s->gb);
475     if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
476         av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
477         goto fail;
478     }
479
480     pps->cabac= get_bits1(&s->gb);
481     pps->pic_order_present= get_bits1(&s->gb);
482     pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
483     if(pps->slice_group_count > 1 ){
484         pps->mb_slice_group_map_type= get_ue_golomb(&s->gb);
485         av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
486         switch(pps->mb_slice_group_map_type){
487         case 0:
488 #if 0
489 |   for( i = 0; i <= num_slice_groups_minus1; i++ ) |   |        |
490 |    run_length[ i ]                                |1  |ue(v)   |
491 #endif
492             break;
493         case 2:
494 #if 0
495 |   for( i = 0; i < num_slice_groups_minus1; i++ )  |   |        |
496 |{                                                  |   |        |
497 |    top_left_mb[ i ]                               |1  |ue(v)   |
498 |    bottom_right_mb[ i ]                           |1  |ue(v)   |
499 |   }                                               |   |        |
500 #endif
501             break;
502         case 3:
503         case 4:
504         case 5:
505 #if 0
506 |   slice_group_change_direction_flag               |1  |u(1)    |
507 |   slice_group_change_rate_minus1                  |1  |ue(v)   |
508 #endif
509             break;
510         case 6:
511 #if 0
512 |   slice_group_id_cnt_minus1                       |1  |ue(v)   |
513 |   for( i = 0; i <= slice_group_id_cnt_minus1; i++ |   |        |
514 |)                                                  |   |        |
515 |    slice_group_id[ i ]                            |1  |u(v)    |
516 #endif
517             break;
518         }
519     }
520     pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
521     pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
522     if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
523         av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
524         goto fail;
525     }
526
527     pps->weighted_pred= get_bits1(&s->gb);
528     pps->weighted_bipred_idc= get_bits(&s->gb, 2);
529     pps->init_qp= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
530     pps->init_qs= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
531     pps->chroma_qp_index_offset[0]= get_se_golomb(&s->gb);
532     pps->deblocking_filter_parameters_present= get_bits1(&s->gb);
533     pps->constrained_intra_pred= get_bits1(&s->gb);
534     pps->redundant_pic_cnt_present = get_bits1(&s->gb);
535
536     pps->transform_8x8_mode= 0;
537     h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
538     memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
539     memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
540
541     if(get_bits_count(&s->gb) < bit_length){
542         pps->transform_8x8_mode= get_bits1(&s->gb);
543         decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
544         pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
545     } else {
546         pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
547     }
548
549     build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], h->sps.bit_depth_luma);
550     build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], h->sps.bit_depth_luma);
551     if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
552         pps->chroma_qp_diff= 1;
553
554     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
555         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",
556                pps_id, pps->sps_id,
557                pps->cabac ? "CABAC" : "CAVLC",
558                pps->slice_group_count,
559                pps->ref_count[0], pps->ref_count[1],
560                pps->weighted_pred ? "weighted" : "",
561                pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
562                pps->deblocking_filter_parameters_present ? "LPAR" : "",
563                pps->constrained_intra_pred ? "CONSTR" : "",
564                pps->redundant_pic_cnt_present ? "REDU" : "",
565                pps->transform_8x8_mode ? "8x8DCT" : ""
566                );
567     }
568
569     av_free(h->pps_buffers[pps_id]);
570     h->pps_buffers[pps_id]= pps;
571     return 0;
572 fail:
573     av_free(pps);
574     return -1;
575 }