Merge remote-tracking branch 'qatar/master'
[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 FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg 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 FFmpeg; 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[5][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         0,  1, 2, 3,  4,  5,
88         6,  7, 8, 9, 10, 11,
89         12,13,14,15, 16, 17,
90         CHROMA_QP_TABLE_END(11)
91     },
92     {
93         0,  1, 2, 3,  4,  5,
94         6,  7, 8, 9, 10, 11,
95         12,13,14,15, 16, 17,
96         18,19,20,21, 22, 23,
97         CHROMA_QP_TABLE_END(12)
98     },
99 };
100
101 static const uint8_t default_scaling4[2][16]={
102 {   6,13,20,28,
103    13,20,28,32,
104    20,28,32,37,
105    28,32,37,42
106 },{
107    10,14,20,24,
108    14,20,24,27,
109    20,24,27,30,
110    24,27,30,34
111 }};
112
113 static const uint8_t default_scaling8[2][64]={
114 {   6,10,13,16,18,23,25,27,
115    10,11,16,18,23,25,27,29,
116    13,16,18,23,25,27,29,31,
117    16,18,23,25,27,29,31,33,
118    18,23,25,27,29,31,33,36,
119    23,25,27,29,31,33,36,38,
120    25,27,29,31,33,36,38,40,
121    27,29,31,33,36,38,40,42
122 },{
123     9,13,15,17,19,21,22,24,
124    13,13,17,19,21,22,24,25,
125    15,17,19,21,22,24,25,27,
126    17,19,21,22,24,25,27,28,
127    19,21,22,24,25,27,28,30,
128    21,22,24,25,27,28,30,32,
129    22,24,25,27,28,30,32,33,
130    24,25,27,28,30,32,33,35
131 }};
132
133 static inline int decode_hrd_parameters(H264Context *h, SPS *sps){
134     MpegEncContext * const s = &h->s;
135     int cpb_count, i;
136     cpb_count = get_ue_golomb_31(&s->gb) + 1;
137
138     if(cpb_count > 32U){
139         av_log(h->s.avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
140         return -1;
141     }
142
143     get_bits(&s->gb, 4); /* bit_rate_scale */
144     get_bits(&s->gb, 4); /* cpb_size_scale */
145     for(i=0; i<cpb_count; i++){
146         get_ue_golomb_long(&s->gb); /* bit_rate_value_minus1 */
147         get_ue_golomb_long(&s->gb); /* cpb_size_value_minus1 */
148         get_bits1(&s->gb);     /* cbr_flag */
149     }
150     sps->initial_cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
151     sps->cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
152     sps->dpb_output_delay_length = get_bits(&s->gb, 5) + 1;
153     sps->time_offset_length = get_bits(&s->gb, 5);
154     sps->cpb_cnt = cpb_count;
155     return 0;
156 }
157
158 static inline int decode_vui_parameters(H264Context *h, SPS *sps){
159     MpegEncContext * const s = &h->s;
160     int aspect_ratio_info_present_flag;
161     unsigned int aspect_ratio_idc;
162
163     aspect_ratio_info_present_flag= get_bits1(&s->gb);
164
165     if( aspect_ratio_info_present_flag ) {
166         aspect_ratio_idc= get_bits(&s->gb, 8);
167         if( aspect_ratio_idc == EXTENDED_SAR ) {
168             sps->sar.num= get_bits(&s->gb, 16);
169             sps->sar.den= get_bits(&s->gb, 16);
170         }else if(aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)){
171             sps->sar=  pixel_aspect[aspect_ratio_idc];
172         }else{
173             av_log(h->s.avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
174             return -1;
175         }
176     }else{
177         sps->sar.num=
178         sps->sar.den= 0;
179     }
180 //            s->avctx->aspect_ratio= sar_width*s->width / (float)(s->height*sar_height);
181
182     if(get_bits1(&s->gb)){      /* overscan_info_present_flag */
183         get_bits1(&s->gb);      /* overscan_appropriate_flag */
184     }
185
186     sps->video_signal_type_present_flag = get_bits1(&s->gb);
187     if(sps->video_signal_type_present_flag){
188         get_bits(&s->gb, 3);    /* video_format */
189         sps->full_range = get_bits1(&s->gb); /* video_full_range_flag */
190
191         sps->colour_description_present_flag = get_bits1(&s->gb);
192         if(sps->colour_description_present_flag){
193             sps->color_primaries = get_bits(&s->gb, 8); /* colour_primaries */
194             sps->color_trc       = get_bits(&s->gb, 8); /* transfer_characteristics */
195             sps->colorspace      = get_bits(&s->gb, 8); /* matrix_coefficients */
196             if (sps->color_primaries >= AVCOL_PRI_NB)
197                 sps->color_primaries  = AVCOL_PRI_UNSPECIFIED;
198             if (sps->color_trc >= AVCOL_TRC_NB)
199                 sps->color_trc  = AVCOL_TRC_UNSPECIFIED;
200             if (sps->colorspace >= AVCOL_SPC_NB)
201                 sps->colorspace  = AVCOL_SPC_UNSPECIFIED;
202         }
203     }
204
205     if(get_bits1(&s->gb)){      /* chroma_location_info_present_flag */
206         s->avctx->chroma_sample_location = get_ue_golomb(&s->gb)+1;  /* chroma_sample_location_type_top_field */
207         get_ue_golomb(&s->gb);  /* chroma_sample_location_type_bottom_field */
208     }
209
210     sps->timing_info_present_flag = get_bits1(&s->gb);
211     if(sps->timing_info_present_flag){
212         sps->num_units_in_tick = get_bits_long(&s->gb, 32);
213         sps->time_scale = get_bits_long(&s->gb, 32);
214         if(!sps->num_units_in_tick || !sps->time_scale){
215             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);
216             return -1;
217         }
218         sps->fixed_frame_rate_flag = get_bits1(&s->gb);
219     }
220
221     sps->nal_hrd_parameters_present_flag = get_bits1(&s->gb);
222     if(sps->nal_hrd_parameters_present_flag)
223         if(decode_hrd_parameters(h, sps) < 0)
224             return -1;
225     sps->vcl_hrd_parameters_present_flag = get_bits1(&s->gb);
226     if(sps->vcl_hrd_parameters_present_flag)
227         if(decode_hrd_parameters(h, sps) < 0)
228             return -1;
229     if(sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag)
230         get_bits1(&s->gb);     /* low_delay_hrd_flag */
231     sps->pic_struct_present_flag = get_bits1(&s->gb);
232     if(!get_bits_left(&s->gb))
233         return 0;
234     sps->bitstream_restriction_flag = get_bits1(&s->gb);
235     if(sps->bitstream_restriction_flag){
236         get_bits1(&s->gb);     /* motion_vectors_over_pic_boundaries_flag */
237         get_ue_golomb(&s->gb); /* max_bytes_per_pic_denom */
238         get_ue_golomb(&s->gb); /* max_bits_per_mb_denom */
239         get_ue_golomb(&s->gb); /* log2_max_mv_length_horizontal */
240         get_ue_golomb(&s->gb); /* log2_max_mv_length_vertical */
241         sps->num_reorder_frames= get_ue_golomb(&s->gb);
242         get_ue_golomb(&s->gb); /*max_dec_frame_buffering*/
243
244         if (get_bits_left(&s->gb) < 0) {
245             sps->num_reorder_frames=0;
246             sps->bitstream_restriction_flag= 0;
247         }
248
249         if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
250             av_log(h->s.avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
251             return -1;
252         }
253     }
254
255     if (get_bits_left(&s->gb) < 0) {
256         av_log(h->s.avctx, AV_LOG_ERROR, "Overread VUI by %d bits\n", -get_bits_left(&s->gb));
257         return AVERROR_INVALIDDATA;
258     }
259
260     return 0;
261 }
262
263 static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
264                                 const uint8_t *jvt_list, const uint8_t *fallback_list){
265     MpegEncContext * const s = &h->s;
266     int i, last = 8, next = 8;
267     const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
268     if(!get_bits1(&s->gb)) /* matrix not written, we use the predicted one */
269         memcpy(factors, fallback_list, size*sizeof(uint8_t));
270     else
271     for(i=0;i<size;i++){
272         if(next)
273             next = (last + get_se_golomb(&s->gb)) & 0xff;
274         if(!i && !next){ /* matrix not written, we use the preset one */
275             memcpy(factors, jvt_list, size*sizeof(uint8_t));
276             break;
277         }
278         last = factors[scan[i]] = next ? next : last;
279     }
280 }
281
282 static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
283                                    uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
284     MpegEncContext * const s = &h->s;
285     int fallback_sps = !is_sps && sps->scaling_matrix_present;
286     const uint8_t *fallback[4] = {
287         fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
288         fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
289         fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
290         fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
291     };
292     if(get_bits1(&s->gb)){
293         sps->scaling_matrix_present |= is_sps;
294         decode_scaling_list(h,scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
295         decode_scaling_list(h,scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
296         decode_scaling_list(h,scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
297         decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
298         decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
299         decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
300         if(is_sps || pps->transform_8x8_mode){
301             decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]);  // Intra, Y
302             if(sps->chroma_format_idc == 3){
303                 decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[0],scaling_matrix8[0]);  // Intra, Cr
304                 decode_scaling_list(h,scaling_matrix8[2],64,default_scaling8[0],scaling_matrix8[1]);  // Intra, Cb
305             }
306             decode_scaling_list(h,scaling_matrix8[3],64,default_scaling8[1],fallback[3]);  // Inter, Y
307             if(sps->chroma_format_idc == 3){
308                 decode_scaling_list(h,scaling_matrix8[4],64,default_scaling8[1],scaling_matrix8[3]);  // Inter, Cr
309                 decode_scaling_list(h,scaling_matrix8[5],64,default_scaling8[1],scaling_matrix8[4]);  // Inter, Cb
310             }
311         }
312     }
313 }
314
315 int ff_h264_decode_seq_parameter_set(H264Context *h){
316     MpegEncContext * const s = &h->s;
317     int profile_idc, level_idc, constraint_set_flags = 0;
318     unsigned int sps_id;
319     int i;
320     SPS *sps;
321
322     profile_idc= get_bits(&s->gb, 8);
323     constraint_set_flags |= get_bits1(&s->gb) << 0;   //constraint_set0_flag
324     constraint_set_flags |= get_bits1(&s->gb) << 1;   //constraint_set1_flag
325     constraint_set_flags |= get_bits1(&s->gb) << 2;   //constraint_set2_flag
326     constraint_set_flags |= get_bits1(&s->gb) << 3;   //constraint_set3_flag
327     get_bits(&s->gb, 4); // reserved
328     level_idc= get_bits(&s->gb, 8);
329     sps_id= get_ue_golomb_31(&s->gb);
330
331     if(sps_id >= MAX_SPS_COUNT) {
332         av_log(h->s.avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
333         return -1;
334     }
335     sps= av_mallocz(sizeof(SPS));
336     if(sps == NULL)
337         return -1;
338
339     sps->time_offset_length = 24;
340     sps->profile_idc= profile_idc;
341     sps->constraint_set_flags = constraint_set_flags;
342     sps->level_idc= level_idc;
343     sps->full_range = -1;
344
345     memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
346     memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
347     sps->scaling_matrix_present = 0;
348     sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
349
350     if(sps->profile_idc >= 100){ //high profile
351         sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
352         if (sps->chroma_format_idc > 3U) {
353             av_log(h->s.avctx, AV_LOG_ERROR, "chroma_format_idc %d is illegal\n", sps->chroma_format_idc);
354             goto fail;
355         } else if(sps->chroma_format_idc == 3) {
356             sps->residual_color_transform_flag = get_bits1(&s->gb);
357         }
358         sps->bit_depth_luma   = get_ue_golomb(&s->gb) + 8;
359         sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8;
360         if (sps->bit_depth_luma > 12U || sps->bit_depth_chroma > 12U) {
361             av_log(h->s.avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
362                    sps->bit_depth_luma, sps->bit_depth_chroma);
363             goto fail;
364         }
365         sps->transform_bypass = get_bits1(&s->gb);
366         decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
367     }else{
368         sps->chroma_format_idc= 1;
369         sps->bit_depth_luma   = 8;
370         sps->bit_depth_chroma = 8;
371     }
372
373     sps->log2_max_frame_num= get_ue_golomb(&s->gb) + 4;
374     if (sps->log2_max_frame_num < 4 || sps->log2_max_frame_num > 16) {
375         av_log(h->s.avctx, AV_LOG_ERROR, "illegal log2_max_frame_num %d\n",
376                sps->log2_max_frame_num);
377         goto fail;
378     }
379
380     sps->poc_type= get_ue_golomb_31(&s->gb);
381
382     if(sps->poc_type == 0){ //FIXME #define
383         sps->log2_max_poc_lsb= get_ue_golomb(&s->gb) + 4;
384     } else if(sps->poc_type == 1){//FIXME #define
385         sps->delta_pic_order_always_zero_flag= get_bits1(&s->gb);
386         sps->offset_for_non_ref_pic= get_se_golomb(&s->gb);
387         sps->offset_for_top_to_bottom_field= get_se_golomb(&s->gb);
388         sps->poc_cycle_length                = get_ue_golomb(&s->gb);
389
390         if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
391             av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
392             goto fail;
393         }
394
395         for(i=0; i<sps->poc_cycle_length; i++)
396             sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb);
397     }else if(sps->poc_type != 2){
398         av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
399         goto fail;
400     }
401
402     sps->ref_frame_count= get_ue_golomb_31(&s->gb);
403     if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count > 16U){
404         av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
405         goto fail;
406     }
407     sps->gaps_in_frame_num_allowed_flag= get_bits1(&s->gb);
408     sps->mb_width = get_ue_golomb(&s->gb) + 1;
409     sps->mb_height= get_ue_golomb(&s->gb) + 1;
410     if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
411        av_image_check_size(16*sps->mb_width, 16*sps->mb_height, 0, h->s.avctx)){
412         av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
413         goto fail;
414     }
415
416     sps->frame_mbs_only_flag= get_bits1(&s->gb);
417     if(!sps->frame_mbs_only_flag)
418         sps->mb_aff= get_bits1(&s->gb);
419     else
420         sps->mb_aff= 0;
421
422     sps->direct_8x8_inference_flag= get_bits1(&s->gb);
423
424 #ifndef ALLOW_INTERLACE
425     if(sps->mb_aff)
426         av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
427 #endif
428     sps->crop= get_bits1(&s->gb);
429     if(sps->crop){
430         int crop_vertical_limit   = sps->chroma_format_idc  & 2 ? 16 : 8;
431         int crop_horizontal_limit = sps->chroma_format_idc == 3 ? 16 : 8;
432         sps->crop_left  = get_ue_golomb(&s->gb);
433         sps->crop_right = get_ue_golomb(&s->gb);
434         sps->crop_top   = get_ue_golomb(&s->gb);
435         sps->crop_bottom= get_ue_golomb(&s->gb);
436         if(sps->crop_left || sps->crop_top){
437             av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ... (left: %d, top: %d)\n", sps->crop_left, sps->crop_top);
438         }
439         if(sps->crop_right >= crop_horizontal_limit || sps->crop_bottom >= crop_vertical_limit){
440             av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, cropping disabled (right: %d, bottom: %d)\n", sps->crop_right, sps->crop_bottom);
441         /* It is very unlikely that partial cropping will make anybody happy.
442          * Not cropping at all fixes for example playback of Sisvel 3D streams
443          * in applications supporting Sisvel 3D. */
444         sps->crop_left  =
445         sps->crop_right =
446         sps->crop_top   =
447         sps->crop_bottom= 0;
448         }
449     }else{
450         sps->crop_left  =
451         sps->crop_right =
452         sps->crop_top   =
453         sps->crop_bottom= 0;
454     }
455
456     sps->vui_parameters_present_flag= get_bits1(&s->gb);
457     if( sps->vui_parameters_present_flag )
458         if (decode_vui_parameters(h, sps) < 0)
459             goto fail;
460
461     if(!sps->sar.den)
462         sps->sar.den= 1;
463
464     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
465         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 b%d\n",
466                sps_id, sps->profile_idc, sps->level_idc,
467                sps->poc_type,
468                sps->ref_frame_count,
469                sps->mb_width, sps->mb_height,
470                sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
471                sps->direct_8x8_inference_flag ? "8B8" : "",
472                sps->crop_left, sps->crop_right,
473                sps->crop_top, sps->crop_bottom,
474                sps->vui_parameters_present_flag ? "VUI" : "",
475                ((const char*[]){"Gray","420","422","444"})[sps->chroma_format_idc],
476                sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
477                sps->timing_info_present_flag ? sps->time_scale : 0,
478                sps->bit_depth_luma
479                );
480     }
481
482     av_free(h->sps_buffers[sps_id]);
483     h->sps_buffers[sps_id]= sps;
484     h->sps = *sps;
485     return 0;
486 fail:
487     av_free(sps);
488     return -1;
489 }
490
491 static void
492 build_qp_table(PPS *pps, int t, int index, const int depth)
493 {
494     int i;
495     const int max_qp = 51 + 6*(depth-8);
496     for(i = 0; i < max_qp+1; i++)
497         pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[depth-8][av_clip(i + index, 0, max_qp)];
498 }
499
500 static int more_rbsp_data_in_pps(H264Context *h, PPS *pps)
501 {
502     const SPS *sps = h->sps_buffers[pps->sps_id];
503     int profile_idc = sps->profile_idc;
504
505     if ((profile_idc == 66 || profile_idc == 77 ||
506          profile_idc == 88) && (sps->constraint_set_flags & 7)) {
507         av_log(h->s.avctx, AV_LOG_VERBOSE,
508                "Current profile doesn't provide more RBSP data in PPS, skipping\n");
509         return 0;
510     }
511
512     return 1;
513 }
514
515 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
516     MpegEncContext * const s = &h->s;
517     unsigned int pps_id= get_ue_golomb(&s->gb);
518     PPS *pps;
519     const int qp_bd_offset = 6*(h->sps.bit_depth_luma-8);
520     int bits_left;
521
522     if(pps_id >= MAX_PPS_COUNT) {
523         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
524         return -1;
525     } else if (h->sps.bit_depth_luma > 10) {
526         av_log(h->s.avctx, AV_LOG_ERROR, "Unimplemented luma bit depth=%d (max=10)\n", h->sps.bit_depth_luma);
527         return AVERROR_PATCHWELCOME;
528     }
529
530     pps= av_mallocz(sizeof(PPS));
531     if(pps == NULL)
532         return -1;
533     pps->sps_id= get_ue_golomb_31(&s->gb);
534     if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
535         av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
536         goto fail;
537     }
538
539     pps->cabac= get_bits1(&s->gb);
540     pps->pic_order_present= get_bits1(&s->gb);
541     pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
542     if(pps->slice_group_count > 1 ){
543         pps->mb_slice_group_map_type= get_ue_golomb(&s->gb);
544         av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
545         switch(pps->mb_slice_group_map_type){
546         case 0:
547 #if 0
548 |   for( i = 0; i <= num_slice_groups_minus1; i++ ) |   |        |
549 |    run_length[ i ]                                |1  |ue(v)   |
550 #endif
551             break;
552         case 2:
553 #if 0
554 |   for( i = 0; i < num_slice_groups_minus1; i++ )  |   |        |
555 |{                                                  |   |        |
556 |    top_left_mb[ i ]                               |1  |ue(v)   |
557 |    bottom_right_mb[ i ]                           |1  |ue(v)   |
558 |   }                                               |   |        |
559 #endif
560             break;
561         case 3:
562         case 4:
563         case 5:
564 #if 0
565 |   slice_group_change_direction_flag               |1  |u(1)    |
566 |   slice_group_change_rate_minus1                  |1  |ue(v)   |
567 #endif
568             break;
569         case 6:
570 #if 0
571 |   slice_group_id_cnt_minus1                       |1  |ue(v)   |
572 |   for( i = 0; i <= slice_group_id_cnt_minus1; i++ |   |        |
573 |)                                                  |   |        |
574 |    slice_group_id[ i ]                            |1  |u(v)    |
575 #endif
576             break;
577         }
578     }
579     pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
580     pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
581     if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
582         av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
583         goto fail;
584     }
585
586     pps->weighted_pred= get_bits1(&s->gb);
587     pps->weighted_bipred_idc= get_bits(&s->gb, 2);
588     pps->init_qp= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
589     pps->init_qs= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
590     pps->chroma_qp_index_offset[0]= get_se_golomb(&s->gb);
591     pps->deblocking_filter_parameters_present= get_bits1(&s->gb);
592     pps->constrained_intra_pred= get_bits1(&s->gb);
593     pps->redundant_pic_cnt_present = get_bits1(&s->gb);
594
595     pps->transform_8x8_mode= 0;
596     h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
597     memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
598     memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
599
600     bits_left = bit_length - get_bits_count(&s->gb);
601     if(bits_left > 0 && more_rbsp_data_in_pps(h, pps)){
602         pps->transform_8x8_mode= get_bits1(&s->gb);
603         decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
604         pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
605     } else {
606         pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
607     }
608
609     build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], h->sps.bit_depth_luma);
610     build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], h->sps.bit_depth_luma);
611     if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
612         pps->chroma_qp_diff= 1;
613
614     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
615         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",
616                pps_id, pps->sps_id,
617                pps->cabac ? "CABAC" : "CAVLC",
618                pps->slice_group_count,
619                pps->ref_count[0], pps->ref_count[1],
620                pps->weighted_pred ? "weighted" : "",
621                pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
622                pps->deblocking_filter_parameters_present ? "LPAR" : "",
623                pps->constrained_intra_pred ? "CONSTR" : "",
624                pps->redundant_pic_cnt_present ? "REDU" : "",
625                pps->transform_8x8_mode ? "8x8DCT" : ""
626                );
627     }
628
629     av_free(h->pps_buffers[pps_id]);
630     h->pps_buffers[pps_id]= pps;
631     return 0;
632 fail:
633     av_free(pps);
634     return -1;
635 }