677ca80abb55fdc095d83ccd5ead614a826418cb
[libav.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(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 int bits_left;
466
467 if(pps_id >= MAX_PPS_COUNT) {
468 av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
469 return -1;
470 }
471
472 pps= av_mallocz(sizeof(PPS));
473 if(pps == NULL)
474 return -1;
475 pps->sps_id= get_ue_golomb_31(&s->gb);
476 if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
477 av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
478 goto fail;
479 }
480
481 pps->cabac= get_bits1(&s->gb);
482 pps->pic_order_present= get_bits1(&s->gb);
483 pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
484 if(pps->slice_group_count > 1 ){
485 pps->mb_slice_group_map_type= get_ue_golomb(&s->gb);
486 av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
487 switch(pps->mb_slice_group_map_type){
488 case 0:
489 #if 0
490 | for( i = 0; i <= num_slice_groups_minus1; i++ ) | | |
491 | run_length[ i ] |1 |ue(v) |
492 #endif
493 break;
494 case 2:
495 #if 0
496 | for( i = 0; i < num_slice_groups_minus1; i++ ) | | |
497 |{ | | |
498 | top_left_mb[ i ] |1 |ue(v) |
499 | bottom_right_mb[ i ] |1 |ue(v) |
500 | } | | |
501 #endif
502 break;
503 case 3:
504 case 4:
505 case 5:
506 #if 0
507 | slice_group_change_direction_flag |1 |u(1) |
508 | slice_group_change_rate_minus1 |1 |ue(v) |
509 #endif
510 break;
511 case 6:
512 #if 0
513 | slice_group_id_cnt_minus1 |1 |ue(v) |
514 | for( i = 0; i <= slice_group_id_cnt_minus1; i++ | | |
515 |) | | |
516 | slice_group_id[ i ] |1 |u(v) |
517 #endif
518 break;
519 }
520 }
521 pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
522 pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
523 if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
524 av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
525 goto fail;
526 }
527
528 pps->weighted_pred= get_bits1(&s->gb);
529 pps->weighted_bipred_idc= get_bits(&s->gb, 2);
530 pps->init_qp= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
531 pps->init_qs= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
532 pps->chroma_qp_index_offset[0]= get_se_golomb(&s->gb);
533 pps->deblocking_filter_parameters_present= get_bits1(&s->gb);
534 pps->constrained_intra_pred= get_bits1(&s->gb);
535 pps->redundant_pic_cnt_present = get_bits1(&s->gb);
536
537 pps->transform_8x8_mode= 0;
538 h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
539 memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
540 memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
541
542 bits_left = bit_length - get_bits_count(&s->gb);
543 if (bits_left && (bits_left > 8 ||
544 show_bits(&s->gb, bits_left) != 1 << (bits_left - 1))) {
545 pps->transform_8x8_mode= get_bits1(&s->gb);
546 decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
547 pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
548 } else {
549 pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
550 }
551
552 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], h->sps.bit_depth_luma);
553 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], h->sps.bit_depth_luma);
554 if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
555 pps->chroma_qp_diff= 1;
556
557 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
558 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",
559 pps_id, pps->sps_id,
560 pps->cabac ? "CABAC" : "CAVLC",
561 pps->slice_group_count,
562 pps->ref_count[0], pps->ref_count[1],
563 pps->weighted_pred ? "weighted" : "",
564 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
565 pps->deblocking_filter_parameters_present ? "LPAR" : "",
566 pps->constrained_intra_pred ? "CONSTR" : "",
567 pps->redundant_pic_cnt_present ? "REDU" : "",
568 pps->transform_8x8_mode ? "8x8DCT" : ""
569 );
570 }
571
572 av_free(h->pps_buffers[pps_id]);
573 h->pps_buffers[pps_id]= pps;
574 return 0;
575 fail:
576 av_free(pps);
577 return -1;
578 }