Remove some silly disabled code.
[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_long(&s->gb); /* bit_rate_value_minus1 */
134         get_ue_golomb_long(&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 (get_bits_left(&s->gb) < 0) {
231             sps->num_reorder_frames=0;
232             sps->bitstream_restriction_flag= 0;
233         }
234
235         if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
236             av_log(h->s.avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
237             return -1;
238         }
239     }
240     if (get_bits_left(&s->gb) < 0) {
241         av_log(h->s.avctx, AV_LOG_ERROR, "Overread VUI by %d bits\n", -get_bits_left(&s->gb));
242         return AVERROR_INVALIDDATA;
243     }
244
245     return 0;
246 }
247
248 static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
249                                 const uint8_t *jvt_list, const uint8_t *fallback_list){
250     MpegEncContext * const s = &h->s;
251     int i, last = 8, next = 8;
252     const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
253     if(!get_bits1(&s->gb)) /* matrix not written, we use the predicted one */
254         memcpy(factors, fallback_list, size*sizeof(uint8_t));
255     else
256     for(i=0;i<size;i++){
257         if(next)
258             next = (last + get_se_golomb(&s->gb)) & 0xff;
259         if(!i && !next){ /* matrix not written, we use the preset one */
260             memcpy(factors, jvt_list, size*sizeof(uint8_t));
261             break;
262         }
263         last = factors[scan[i]] = next ? next : last;
264     }
265 }
266
267 static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
268                                    uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
269     MpegEncContext * const s = &h->s;
270     int fallback_sps = !is_sps && sps->scaling_matrix_present;
271     const uint8_t *fallback[4] = {
272         fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
273         fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
274         fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
275         fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
276     };
277     if(get_bits1(&s->gb)){
278         sps->scaling_matrix_present |= is_sps;
279         decode_scaling_list(h,scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
280         decode_scaling_list(h,scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
281         decode_scaling_list(h,scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
282         decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
283         decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
284         decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
285         if(is_sps || pps->transform_8x8_mode){
286             decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]);  // Intra, Y
287             if(sps->chroma_format_idc == 3){
288                 decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[0],scaling_matrix8[0]);  // Intra, Cr
289                 decode_scaling_list(h,scaling_matrix8[2],64,default_scaling8[0],scaling_matrix8[1]);  // Intra, Cb
290             }
291             decode_scaling_list(h,scaling_matrix8[3],64,default_scaling8[1],fallback[3]);  // Inter, Y
292             if(sps->chroma_format_idc == 3){
293                 decode_scaling_list(h,scaling_matrix8[4],64,default_scaling8[1],scaling_matrix8[3]);  // Inter, Cr
294                 decode_scaling_list(h,scaling_matrix8[5],64,default_scaling8[1],scaling_matrix8[4]);  // Inter, Cb
295             }
296         }
297     }
298 }
299
300 int ff_h264_decode_seq_parameter_set(H264Context *h){
301     MpegEncContext * const s = &h->s;
302     int profile_idc, level_idc, constraint_set_flags = 0;
303     unsigned int sps_id;
304     int i;
305     SPS *sps;
306
307     profile_idc= get_bits(&s->gb, 8);
308     constraint_set_flags |= get_bits1(&s->gb) << 0;   //constraint_set0_flag
309     constraint_set_flags |= get_bits1(&s->gb) << 1;   //constraint_set1_flag
310     constraint_set_flags |= get_bits1(&s->gb) << 2;   //constraint_set2_flag
311     constraint_set_flags |= get_bits1(&s->gb) << 3;   //constraint_set3_flag
312     get_bits(&s->gb, 4); // reserved
313     level_idc= get_bits(&s->gb, 8);
314     sps_id= get_ue_golomb_31(&s->gb);
315
316     if(sps_id >= MAX_SPS_COUNT) {
317         av_log(h->s.avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
318         return -1;
319     }
320     sps= av_mallocz(sizeof(SPS));
321     if(sps == NULL)
322         return -1;
323
324     sps->time_offset_length = 24;
325     sps->profile_idc= profile_idc;
326     sps->constraint_set_flags = constraint_set_flags;
327     sps->level_idc= level_idc;
328
329     memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
330     memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
331     sps->scaling_matrix_present = 0;
332
333     if(sps->profile_idc >= 100){ //high profile
334         sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
335         if(sps->chroma_format_idc > 3) {
336             av_log(h->s.avctx, AV_LOG_ERROR, "chroma_format_idc (%u) out of range\n", sps->chroma_format_idc);
337             goto fail;
338         } else if(sps->chroma_format_idc == 3) {
339             sps->residual_color_transform_flag = get_bits1(&s->gb);
340         }
341         sps->bit_depth_luma   = get_ue_golomb(&s->gb) + 8;
342         sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8;
343         sps->transform_bypass = get_bits1(&s->gb);
344         decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
345     }else{
346         sps->chroma_format_idc= 1;
347         sps->bit_depth_luma   = 8;
348         sps->bit_depth_chroma = 8;
349     }
350
351     sps->log2_max_frame_num= get_ue_golomb(&s->gb) + 4;
352     sps->poc_type= get_ue_golomb_31(&s->gb);
353
354     if(sps->poc_type == 0){ //FIXME #define
355         sps->log2_max_poc_lsb= get_ue_golomb(&s->gb) + 4;
356     } else if(sps->poc_type == 1){//FIXME #define
357         sps->delta_pic_order_always_zero_flag= get_bits1(&s->gb);
358         sps->offset_for_non_ref_pic= get_se_golomb(&s->gb);
359         sps->offset_for_top_to_bottom_field= get_se_golomb(&s->gb);
360         sps->poc_cycle_length                = get_ue_golomb(&s->gb);
361
362         if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
363             av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
364             goto fail;
365         }
366
367         for(i=0; i<sps->poc_cycle_length; i++)
368             sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb);
369     }else if(sps->poc_type != 2){
370         av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
371         goto fail;
372     }
373
374     sps->ref_frame_count= get_ue_golomb_31(&s->gb);
375     if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count >= 32U){
376         av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
377         goto fail;
378     }
379     sps->gaps_in_frame_num_allowed_flag= get_bits1(&s->gb);
380     sps->mb_width = get_ue_golomb(&s->gb) + 1;
381     sps->mb_height= get_ue_golomb(&s->gb) + 1;
382     if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
383        av_image_check_size(16*sps->mb_width, 16*sps->mb_height, 0, h->s.avctx)){
384         av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
385         goto fail;
386     }
387
388     sps->frame_mbs_only_flag= get_bits1(&s->gb);
389     if(!sps->frame_mbs_only_flag)
390         sps->mb_aff= get_bits1(&s->gb);
391     else
392         sps->mb_aff= 0;
393
394     sps->direct_8x8_inference_flag= get_bits1(&s->gb);
395     if(!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag){
396         av_log(h->s.avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
397         goto fail;
398     }
399
400 #ifndef ALLOW_INTERLACE
401     if(sps->mb_aff)
402         av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
403 #endif
404     sps->crop= get_bits1(&s->gb);
405     if(sps->crop){
406         int crop_vertical_limit   = sps->chroma_format_idc  & 2 ? 16 : 8;
407         int crop_horizontal_limit = sps->chroma_format_idc == 3 ? 16 : 8;
408         sps->crop_left  = get_ue_golomb(&s->gb);
409         sps->crop_right = get_ue_golomb(&s->gb);
410         sps->crop_top   = get_ue_golomb(&s->gb);
411         sps->crop_bottom= get_ue_golomb(&s->gb);
412         if(sps->crop_left || sps->crop_top){
413             av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
414         }
415         if(sps->crop_right >= crop_horizontal_limit || sps->crop_bottom >= crop_vertical_limit){
416             av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n");
417         }
418     }else{
419         sps->crop_left  =
420         sps->crop_right =
421         sps->crop_top   =
422         sps->crop_bottom= 0;
423     }
424
425     sps->vui_parameters_present_flag= get_bits1(&s->gb);
426     if( sps->vui_parameters_present_flag )
427         if (decode_vui_parameters(h, sps) < 0)
428             goto fail;
429
430     if(!sps->sar.den)
431         sps->sar.den= 1;
432
433     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
434         static const char csp[4][5] = { "Gray", "420", "422", "444" };
435         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",
436                sps_id, sps->profile_idc, sps->level_idc,
437                sps->poc_type,
438                sps->ref_frame_count,
439                sps->mb_width, sps->mb_height,
440                sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
441                sps->direct_8x8_inference_flag ? "8B8" : "",
442                sps->crop_left, sps->crop_right,
443                sps->crop_top, sps->crop_bottom,
444                sps->vui_parameters_present_flag ? "VUI" : "",
445                csp[sps->chroma_format_idc],
446                sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
447                sps->timing_info_present_flag ? sps->time_scale : 0
448                );
449     }
450
451     av_free(h->sps_buffers[sps_id]);
452     h->sps_buffers[sps_id]= sps;
453     h->sps = *sps;
454     return 0;
455 fail:
456     av_free(sps);
457     return -1;
458 }
459
460 static void
461 build_qp_table(PPS *pps, int t, int index, const int depth)
462 {
463     int i;
464     const int max_qp = 51 + 6*(depth-8);
465     for(i = 0; i < max_qp+1; i++)
466         pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[depth-8][av_clip(i + index, 0, max_qp)];
467 }
468
469 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
470     MpegEncContext * const s = &h->s;
471     unsigned int pps_id= get_ue_golomb(&s->gb);
472     PPS *pps;
473     const int qp_bd_offset = 6*(h->sps.bit_depth_luma-8);
474     int bits_left;
475
476     if(pps_id >= MAX_PPS_COUNT) {
477         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
478         return -1;
479     } else if (h->sps.bit_depth_luma > 10) {
480         av_log(h->s.avctx, AV_LOG_ERROR, "Unimplemented luma bit depth=%d (max=10)\n", h->sps.bit_depth_luma);
481         return AVERROR_PATCHWELCOME;
482     }
483
484     pps= av_mallocz(sizeof(PPS));
485     if(pps == NULL)
486         return -1;
487     pps->sps_id= get_ue_golomb_31(&s->gb);
488     if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
489         av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
490         goto fail;
491     }
492
493     pps->cabac= get_bits1(&s->gb);
494     pps->pic_order_present= get_bits1(&s->gb);
495     pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
496     if(pps->slice_group_count > 1 ){
497         pps->mb_slice_group_map_type= get_ue_golomb(&s->gb);
498         av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
499         switch(pps->mb_slice_group_map_type){
500         case 0:
501 #if 0
502 |   for( i = 0; i <= num_slice_groups_minus1; i++ ) |   |        |
503 |    run_length[ i ]                                |1  |ue(v)   |
504 #endif
505             break;
506         case 2:
507 #if 0
508 |   for( i = 0; i < num_slice_groups_minus1; i++ )  |   |        |
509 |{                                                  |   |        |
510 |    top_left_mb[ i ]                               |1  |ue(v)   |
511 |    bottom_right_mb[ i ]                           |1  |ue(v)   |
512 |   }                                               |   |        |
513 #endif
514             break;
515         case 3:
516         case 4:
517         case 5:
518 #if 0
519 |   slice_group_change_direction_flag               |1  |u(1)    |
520 |   slice_group_change_rate_minus1                  |1  |ue(v)   |
521 #endif
522             break;
523         case 6:
524 #if 0
525 |   slice_group_id_cnt_minus1                       |1  |ue(v)   |
526 |   for( i = 0; i <= slice_group_id_cnt_minus1; i++ |   |        |
527 |)                                                  |   |        |
528 |    slice_group_id[ i ]                            |1  |u(v)    |
529 #endif
530             break;
531         }
532     }
533     pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
534     pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
535     if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
536         av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
537         goto fail;
538     }
539
540     pps->weighted_pred= get_bits1(&s->gb);
541     pps->weighted_bipred_idc= get_bits(&s->gb, 2);
542     pps->init_qp= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
543     pps->init_qs= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
544     pps->chroma_qp_index_offset[0]= get_se_golomb(&s->gb);
545     pps->deblocking_filter_parameters_present= get_bits1(&s->gb);
546     pps->constrained_intra_pred= get_bits1(&s->gb);
547     pps->redundant_pic_cnt_present = get_bits1(&s->gb);
548
549     pps->transform_8x8_mode= 0;
550     h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
551     memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
552     memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
553
554     bits_left = bit_length - get_bits_count(&s->gb);
555     if (bits_left && (bits_left > 8 ||
556                       show_bits(&s->gb, bits_left) != 1 << (bits_left - 1))) {
557         pps->transform_8x8_mode= get_bits1(&s->gb);
558         decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
559         pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
560     } else {
561         pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
562     }
563
564     build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], h->sps.bit_depth_luma);
565     build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], h->sps.bit_depth_luma);
566     if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
567         pps->chroma_qp_diff= 1;
568
569     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
570         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",
571                pps_id, pps->sps_id,
572                pps->cabac ? "CABAC" : "CAVLC",
573                pps->slice_group_count,
574                pps->ref_count[0], pps->ref_count[1],
575                pps->weighted_pred ? "weighted" : "",
576                pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
577                pps->deblocking_filter_parameters_present ? "LPAR" : "",
578                pps->constrained_intra_pred ? "CONSTR" : "",
579                pps->redundant_pic_cnt_present ? "REDU" : "",
580                pps->transform_8x8_mode ? "8x8DCT" : ""
581                );
582     }
583
584     av_free(h->pps_buffers[pps_id]);
585     h->pps_buffers[pps_id]= pps;
586     return 0;
587 fail:
588     av_free(pps);
589     return -1;
590 }