FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
hevc_ps.c
Go to the documentation of this file.
1 /*
2  * HEVC Parameter Set decoding
3  *
4  * Copyright (C) 2012 - 2103 Guillaume Martres
5  * Copyright (C) 2012 - 2103 Mickael Raulet
6  * Copyright (C) 2012 - 2013 Gildas Cocherel
7  * Copyright (C) 2013 Vittorio Giovara
8  *
9  * This file is part of FFmpeg.
10  *
11  * FFmpeg is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Lesser General Public
13  * License as published by the Free Software Foundation; either
14  * version 2.1 of the License, or (at your option) any later version.
15  *
16  * FFmpeg is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  * Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public
22  * License along with FFmpeg; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24  */
25 
26 #include "libavutil/imgutils.h"
27 #include "golomb.h"
28 #include "hevc.h"
29 
30 static const uint8_t default_scaling_list_intra[] = {
31  16, 16, 16, 16, 17, 18, 21, 24,
32  16, 16, 16, 16, 17, 19, 22, 25,
33  16, 16, 17, 18, 20, 22, 25, 29,
34  16, 16, 18, 21, 24, 27, 31, 36,
35  17, 17, 20, 24, 30, 35, 41, 47,
36  18, 19, 22, 27, 35, 44, 54, 65,
37  21, 22, 25, 31, 41, 54, 70, 88,
38  24, 25, 29, 36, 47, 65, 88, 115
39 };
40 
41 static const uint8_t default_scaling_list_inter[] = {
42  16, 16, 16, 16, 17, 18, 20, 24,
43  16, 16, 16, 17, 18, 20, 24, 25,
44  16, 16, 17, 18, 20, 24, 25, 28,
45  16, 17, 18, 20, 24, 25, 28, 33,
46  17, 18, 20, 24, 25, 28, 33, 41,
47  18, 20, 24, 25, 28, 33, 41, 54,
48  20, 24, 25, 28, 33, 41, 54, 71,
49  24, 25, 28, 33, 41, 54, 71, 91
50 };
51 
52 static const AVRational vui_sar[] = {
53  { 0, 1 },
54  { 1, 1 },
55  { 12, 11 },
56  { 10, 11 },
57  { 16, 11 },
58  { 40, 33 },
59  { 24, 11 },
60  { 20, 11 },
61  { 32, 11 },
62  { 80, 33 },
63  { 18, 11 },
64  { 15, 11 },
65  { 64, 33 },
66  { 160, 99 },
67  { 4, 3 },
68  { 3, 2 },
69  { 2, 1 },
70 };
71 
72 int ff_hevc_decode_short_term_rps(HEVCContext *s, ShortTermRPS *rps,
73  const HEVCSPS *sps, int is_slice_header)
74 {
75  HEVCLocalContext *lc = s->HEVClc;
76  uint8_t rps_predict = 0;
77  int delta_poc;
78  int k0 = 0;
79  int k1 = 0;
80  int k = 0;
81  int i;
82 
83  GetBitContext *gb = &lc->gb;
84 
85  if (rps != sps->st_rps && sps->nb_st_rps)
86  rps_predict = get_bits1(gb);
87 
88  if (rps_predict) {
89  const ShortTermRPS *rps_ridx;
90  int delta_rps;
91  unsigned abs_delta_rps;
92  uint8_t use_delta_flag = 0;
93  uint8_t delta_rps_sign;
94 
95  if (is_slice_header) {
96  unsigned int delta_idx = get_ue_golomb_long(gb) + 1;
97  if (delta_idx > sps->nb_st_rps) {
98  av_log(s->avctx, AV_LOG_ERROR,
99  "Invalid value of delta_idx in slice header RPS: %d > %d.\n",
100  delta_idx, sps->nb_st_rps);
101  return AVERROR_INVALIDDATA;
102  }
103  rps_ridx = &sps->st_rps[sps->nb_st_rps - delta_idx];
104  } else
105  rps_ridx = &sps->st_rps[rps - sps->st_rps - 1];
106 
107  delta_rps_sign = get_bits1(gb);
108  abs_delta_rps = get_ue_golomb_long(gb) + 1;
109  if (abs_delta_rps < 1 || abs_delta_rps > 32768) {
110  av_log(s->avctx, AV_LOG_ERROR,
111  "Invalid value of abs_delta_rps: %d\n",
112  abs_delta_rps);
113  return AVERROR_INVALIDDATA;
114  }
115  delta_rps = (1 - (delta_rps_sign << 1)) * abs_delta_rps;
116  for (i = 0; i <= rps_ridx->num_delta_pocs; i++) {
117  int used = rps->used[k] = get_bits1(gb);
118 
119  if (!used)
120  use_delta_flag = get_bits1(gb);
121 
122  if (used || use_delta_flag) {
123  if (i < rps_ridx->num_delta_pocs)
124  delta_poc = delta_rps + rps_ridx->delta_poc[i];
125  else
126  delta_poc = delta_rps;
127  rps->delta_poc[k] = delta_poc;
128  if (delta_poc < 0)
129  k0++;
130  else
131  k1++;
132  k++;
133  }
134  }
135 
136  rps->num_delta_pocs = k;
137  rps->num_negative_pics = k0;
138  // sort in increasing order (smallest first)
139  if (rps->num_delta_pocs != 0) {
140  int used, tmp;
141  for (i = 1; i < rps->num_delta_pocs; i++) {
142  delta_poc = rps->delta_poc[i];
143  used = rps->used[i];
144  for (k = i - 1; k >= 0; k--) {
145  tmp = rps->delta_poc[k];
146  if (delta_poc < tmp) {
147  rps->delta_poc[k + 1] = tmp;
148  rps->used[k + 1] = rps->used[k];
149  rps->delta_poc[k] = delta_poc;
150  rps->used[k] = used;
151  }
152  }
153  }
154  }
155  if ((rps->num_negative_pics >> 1) != 0) {
156  int used;
157  k = rps->num_negative_pics - 1;
158  // flip the negative values to largest first
159  for (i = 0; i < rps->num_negative_pics >> 1; i++) {
160  delta_poc = rps->delta_poc[i];
161  used = rps->used[i];
162  rps->delta_poc[i] = rps->delta_poc[k];
163  rps->used[i] = rps->used[k];
164  rps->delta_poc[k] = delta_poc;
165  rps->used[k] = used;
166  k--;
167  }
168  }
169  } else {
170  unsigned int prev, nb_positive_pics;
171  rps->num_negative_pics = get_ue_golomb_long(gb);
172  nb_positive_pics = get_ue_golomb_long(gb);
173 
174  if (rps->num_negative_pics >= MAX_REFS ||
175  nb_positive_pics >= MAX_REFS) {
176  av_log(s->avctx, AV_LOG_ERROR, "Too many refs in a short term RPS.\n");
177  return AVERROR_INVALIDDATA;
178  }
179 
180  rps->num_delta_pocs = rps->num_negative_pics + nb_positive_pics;
181  if (rps->num_delta_pocs) {
182  prev = 0;
183  for (i = 0; i < rps->num_negative_pics; i++) {
184  delta_poc = get_ue_golomb_long(gb) + 1;
185  prev -= delta_poc;
186  rps->delta_poc[i] = prev;
187  rps->used[i] = get_bits1(gb);
188  }
189  prev = 0;
190  for (i = 0; i < nb_positive_pics; i++) {
191  delta_poc = get_ue_golomb_long(gb) + 1;
192  prev += delta_poc;
193  rps->delta_poc[rps->num_negative_pics + i] = prev;
194  rps->used[rps->num_negative_pics + i] = get_bits1(gb);
195  }
196  }
197  }
198  return 0;
199 }
200 
201 
202 static int decode_profile_tier_level(HEVCContext *s, PTLCommon *ptl)
203 {
204  int i;
205  HEVCLocalContext *lc = s->HEVClc;
206  GetBitContext *gb = &lc->gb;
207 
208  if (get_bits_left(gb) < 2+1+5 + 32 + 4 + 16 + 16 + 12)
209  return -1;
210 
211  ptl->profile_space = get_bits(gb, 2);
212  ptl->tier_flag = get_bits1(gb);
213  ptl->profile_idc = get_bits(gb, 5);
214  if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN)
215  av_log(s->avctx, AV_LOG_DEBUG, "Main profile bitstream\n");
216  else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_10)
217  av_log(s->avctx, AV_LOG_DEBUG, "Main 10 profile bitstream\n");
218  else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_STILL_PICTURE)
219  av_log(s->avctx, AV_LOG_DEBUG, "Main Still Picture profile bitstream\n");
220  else if (ptl->profile_idc == FF_PROFILE_HEVC_REXT)
221  av_log(s->avctx, AV_LOG_DEBUG, "Range Extension profile bitstream\n");
222  else
223  av_log(s->avctx, AV_LOG_WARNING, "Unknown HEVC profile: %d\n", ptl->profile_idc);
224 
225  for (i = 0; i < 32; i++)
226  ptl->profile_compatibility_flag[i] = get_bits1(gb);
227  ptl->progressive_source_flag = get_bits1(gb);
228  ptl->interlaced_source_flag = get_bits1(gb);
229  ptl->non_packed_constraint_flag = get_bits1(gb);
230  ptl->frame_only_constraint_flag = get_bits1(gb);
231 
232  skip_bits(gb, 16); // XXX_reserved_zero_44bits[0..15]
233  skip_bits(gb, 16); // XXX_reserved_zero_44bits[16..31]
234  skip_bits(gb, 12); // XXX_reserved_zero_44bits[32..43]
235 
236  return 0;
237 }
238 
239 static int parse_ptl(HEVCContext *s, PTL *ptl, int max_num_sub_layers)
240 {
241  int i;
242  HEVCLocalContext *lc = s->HEVClc;
243  GetBitContext *gb = &lc->gb;
244  if (decode_profile_tier_level(s, &ptl->general_ptl) < 0 ||
245  get_bits_left(gb) < 8 + 8*2) {
246  av_log(s->avctx, AV_LOG_ERROR, "PTL information too short\n");
247  return -1;
248  }
249 
250  ptl->general_ptl.level_idc = get_bits(gb, 8);
251 
252  for (i = 0; i < max_num_sub_layers - 1; i++) {
253  ptl->sub_layer_profile_present_flag[i] = get_bits1(gb);
254  ptl->sub_layer_level_present_flag[i] = get_bits1(gb);
255  }
256 
257  if (max_num_sub_layers - 1> 0)
258  for (i = max_num_sub_layers - 1; i < 8; i++)
259  skip_bits(gb, 2); // reserved_zero_2bits[i]
260  for (i = 0; i < max_num_sub_layers - 1; i++) {
261  if (ptl->sub_layer_profile_present_flag[i] &&
262  decode_profile_tier_level(s, &ptl->sub_layer_ptl[i]) < 0) {
263  av_log(s->avctx, AV_LOG_ERROR,
264  "PTL information for sublayer %i too short\n", i);
265  return -1;
266  }
267  if (ptl->sub_layer_level_present_flag[i]) {
268  if (get_bits_left(gb) < 8) {
269  av_log(s->avctx, AV_LOG_ERROR,
270  "Not enough data for sublayer %i level_idc\n", i);
271  return -1;
272  } else
273  ptl->sub_layer_ptl[i].level_idc = get_bits(gb, 8);
274  }
275  }
276 
277  return 0;
278 }
279 
280 static void decode_sublayer_hrd(HEVCContext *s, unsigned int nb_cpb,
281  int subpic_params_present)
282 {
283  GetBitContext *gb = &s->HEVClc->gb;
284  int i;
285 
286  for (i = 0; i < nb_cpb; i++) {
287  get_ue_golomb_long(gb); // bit_rate_value_minus1
288  get_ue_golomb_long(gb); // cpb_size_value_minus1
289 
290  if (subpic_params_present) {
291  get_ue_golomb_long(gb); // cpb_size_du_value_minus1
292  get_ue_golomb_long(gb); // bit_rate_du_value_minus1
293  }
294  skip_bits1(gb); // cbr_flag
295  }
296 }
297 
298 static int decode_hrd(HEVCContext *s, int common_inf_present,
299  int max_sublayers)
300 {
301  GetBitContext *gb = &s->HEVClc->gb;
302  int nal_params_present = 0, vcl_params_present = 0;
303  int subpic_params_present = 0;
304  int i;
305 
306  if (common_inf_present) {
307  nal_params_present = get_bits1(gb);
308  vcl_params_present = get_bits1(gb);
309 
310  if (nal_params_present || vcl_params_present) {
311  subpic_params_present = get_bits1(gb);
312 
313  if (subpic_params_present) {
314  skip_bits(gb, 8); // tick_divisor_minus2
315  skip_bits(gb, 5); // du_cpb_removal_delay_increment_length_minus1
316  skip_bits(gb, 1); // sub_pic_cpb_params_in_pic_timing_sei_flag
317  skip_bits(gb, 5); // dpb_output_delay_du_length_minus1
318  }
319 
320  skip_bits(gb, 4); // bit_rate_scale
321  skip_bits(gb, 4); // cpb_size_scale
322 
323  if (subpic_params_present)
324  skip_bits(gb, 4); // cpb_size_du_scale
325 
326  skip_bits(gb, 5); // initial_cpb_removal_delay_length_minus1
327  skip_bits(gb, 5); // au_cpb_removal_delay_length_minus1
328  skip_bits(gb, 5); // dpb_output_delay_length_minus1
329  }
330  }
331 
332  for (i = 0; i < max_sublayers; i++) {
333  int low_delay = 0;
334  unsigned int nb_cpb = 1;
335  int fixed_rate = get_bits1(gb);
336 
337  if (!fixed_rate)
338  fixed_rate = get_bits1(gb);
339 
340  if (fixed_rate)
341  get_ue_golomb_long(gb); // elemental_duration_in_tc_minus1
342  else
343  low_delay = get_bits1(gb);
344 
345  if (!low_delay) {
346  nb_cpb = get_ue_golomb_long(gb) + 1;
347  if (nb_cpb < 1 || nb_cpb > 32) {
348  av_log(s->avctx, AV_LOG_ERROR, "nb_cpb %d invalid\n", nb_cpb);
349  return AVERROR_INVALIDDATA;
350  }
351  }
352 
353  if (nal_params_present)
354  decode_sublayer_hrd(s, nb_cpb, subpic_params_present);
355  if (vcl_params_present)
356  decode_sublayer_hrd(s, nb_cpb, subpic_params_present);
357  }
358  return 0;
359 }
360 
361 int ff_hevc_decode_nal_vps(HEVCContext *s)
362 {
363  int i,j;
364  GetBitContext *gb = &s->HEVClc->gb;
365  int vps_id = 0;
366  HEVCVPS *vps;
367  AVBufferRef *vps_buf = av_buffer_allocz(sizeof(*vps));
368 
369  if (!vps_buf)
370  return AVERROR(ENOMEM);
371  vps = (HEVCVPS*)vps_buf->data;
372 
373  av_log(s->avctx, AV_LOG_DEBUG, "Decoding VPS\n");
374 
375  vps_id = get_bits(gb, 4);
376  if (vps_id >= MAX_VPS_COUNT) {
377  av_log(s->avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", vps_id);
378  goto err;
379  }
380 
381  if (get_bits(gb, 2) != 3) { // vps_reserved_three_2bits
382  av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_three_2bits is not three\n");
383  goto err;
384  }
385 
386  vps->vps_max_layers = get_bits(gb, 6) + 1;
387  vps->vps_max_sub_layers = get_bits(gb, 3) + 1;
388  vps->vps_temporal_id_nesting_flag = get_bits1(gb);
389 
390  if (get_bits(gb, 16) != 0xffff) { // vps_reserved_ffff_16bits
391  av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_ffff_16bits is not 0xffff\n");
392  goto err;
393  }
394 
395  if (vps->vps_max_sub_layers > MAX_SUB_LAYERS) {
396  av_log(s->avctx, AV_LOG_ERROR, "vps_max_sub_layers out of range: %d\n",
397  vps->vps_max_sub_layers);
398  goto err;
399  }
400 
401  if (parse_ptl(s, &vps->ptl, vps->vps_max_sub_layers) < 0)
402  goto err;
403 
404  vps->vps_sub_layer_ordering_info_present_flag = get_bits1(gb);
405 
406  i = vps->vps_sub_layer_ordering_info_present_flag ? 0 : vps->vps_max_sub_layers - 1;
407  for (; i < vps->vps_max_sub_layers; i++) {
408  vps->vps_max_dec_pic_buffering[i] = get_ue_golomb_long(gb) + 1;
409  vps->vps_num_reorder_pics[i] = get_ue_golomb_long(gb);
410  vps->vps_max_latency_increase[i] = get_ue_golomb_long(gb) - 1;
411 
412  if (vps->vps_max_dec_pic_buffering[i] > MAX_DPB_SIZE || !vps->vps_max_dec_pic_buffering[i]) {
413  av_log(s->avctx, AV_LOG_ERROR, "vps_max_dec_pic_buffering_minus1 out of range: %d\n",
414  vps->vps_max_dec_pic_buffering[i] - 1);
415  goto err;
416  }
417  if (vps->vps_num_reorder_pics[i] > vps->vps_max_dec_pic_buffering[i] - 1) {
418  av_log(s->avctx, AV_LOG_WARNING, "vps_max_num_reorder_pics out of range: %d\n",
419  vps->vps_num_reorder_pics[i]);
420  if (s->avctx->err_recognition & AV_EF_EXPLODE)
421  goto err;
422  }
423  }
424 
425  vps->vps_max_layer_id = get_bits(gb, 6);
426  vps->vps_num_layer_sets = get_ue_golomb_long(gb) + 1;
427  if ((vps->vps_num_layer_sets - 1LL) * (vps->vps_max_layer_id + 1LL) > get_bits_left(gb)) {
428  av_log(s->avctx, AV_LOG_ERROR, "too many layer_id_included_flags\n");
429  goto err;
430  }
431 
432  for (i = 1; i < vps->vps_num_layer_sets; i++)
433  for (j = 0; j <= vps->vps_max_layer_id; j++)
434  skip_bits(gb, 1); // layer_id_included_flag[i][j]
435 
436  vps->vps_timing_info_present_flag = get_bits1(gb);
437  if (vps->vps_timing_info_present_flag) {
438  vps->vps_num_units_in_tick = get_bits_long(gb, 32);
439  vps->vps_time_scale = get_bits_long(gb, 32);
440  vps->vps_poc_proportional_to_timing_flag = get_bits1(gb);
441  if (vps->vps_poc_proportional_to_timing_flag)
442  vps->vps_num_ticks_poc_diff_one = get_ue_golomb_long(gb) + 1;
443  vps->vps_num_hrd_parameters = get_ue_golomb_long(gb);
444  for (i = 0; i < vps->vps_num_hrd_parameters; i++) {
445  int common_inf_present = 1;
446 
447  get_ue_golomb_long(gb); // hrd_layer_set_idx
448  if (i)
449  common_inf_present = get_bits1(gb);
450  decode_hrd(s, common_inf_present, vps->vps_max_sub_layers);
451  }
452  }
453  get_bits1(gb); /* vps_extension_flag */
454 
455  if (get_bits_left(gb) < 0) {
456  av_log(s->avctx, AV_LOG_ERROR,
457  "Overread VPS by %d bits\n", -get_bits_left(gb));
458  goto err;
459  }
460 
461  av_buffer_unref(&s->vps_list[vps_id]);
462  s->vps_list[vps_id] = vps_buf;
463  return 0;
464 
465 err:
466  av_buffer_unref(&vps_buf);
467  return AVERROR_INVALIDDATA;
468 }
469 
470 static void decode_vui(HEVCContext *s, HEVCSPS *sps)
471 {
472  VUI *vui = &sps->vui;
473  GetBitContext *gb = &s->HEVClc->gb;
474  GetBitContext backup;
475  int sar_present, alt = 0;
476 
477  av_log(s->avctx, AV_LOG_DEBUG, "Decoding VUI\n");
478 
479  sar_present = get_bits1(gb);
480  if (sar_present) {
481  uint8_t sar_idx = get_bits(gb, 8);
482  if (sar_idx < FF_ARRAY_ELEMS(vui_sar))
483  vui->sar = vui_sar[sar_idx];
484  else if (sar_idx == 255) {
485  vui->sar.num = get_bits(gb, 16);
486  vui->sar.den = get_bits(gb, 16);
487  } else
488  av_log(s->avctx, AV_LOG_WARNING,
489  "Unknown SAR index: %u.\n", sar_idx);
490  }
491 
492  vui->overscan_info_present_flag = get_bits1(gb);
493  if (vui->overscan_info_present_flag)
494  vui->overscan_appropriate_flag = get_bits1(gb);
495 
496  vui->video_signal_type_present_flag = get_bits1(gb);
497  if (vui->video_signal_type_present_flag) {
498  vui->video_format = get_bits(gb, 3);
499  vui->video_full_range_flag = get_bits1(gb);
500  vui->colour_description_present_flag = get_bits1(gb);
501  if (vui->video_full_range_flag && sps->pix_fmt == AV_PIX_FMT_YUV420P)
502  sps->pix_fmt = AV_PIX_FMT_YUVJ420P;
503  if (vui->colour_description_present_flag) {
504  vui->colour_primaries = get_bits(gb, 8);
505  vui->transfer_characteristic = get_bits(gb, 8);
506  vui->matrix_coeffs = get_bits(gb, 8);
507 
508  // Set invalid values to "unspecified"
509  if (vui->colour_primaries >= AVCOL_PRI_NB)
510  vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;
511  if (vui->transfer_characteristic >= AVCOL_TRC_NB)
512  vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;
513  if (vui->matrix_coeffs >= AVCOL_SPC_NB)
514  vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;
515  }
516  }
517 
518  vui->chroma_loc_info_present_flag = get_bits1(gb);
519  if (vui->chroma_loc_info_present_flag) {
520  vui->chroma_sample_loc_type_top_field = get_ue_golomb_long(gb);
521  vui->chroma_sample_loc_type_bottom_field = get_ue_golomb_long(gb);
522  }
523 
524  vui->neutra_chroma_indication_flag = get_bits1(gb);
525  vui->field_seq_flag = get_bits1(gb);
526  vui->frame_field_info_present_flag = get_bits1(gb);
527 
528  if (get_bits_left(gb) >= 68 && show_bits_long(gb, 21) == 0x100000) {
529  vui->default_display_window_flag = 0;
530  av_log(s->avctx, AV_LOG_WARNING, "Invalid default display window\n");
531  } else
532  vui->default_display_window_flag = get_bits1(gb);
533  // Backup context in case an alternate header is detected
534  memcpy(&backup, gb, sizeof(backup));
535 
536  if (vui->default_display_window_flag) {
537  //TODO: * 2 is only valid for 420
538  vui->def_disp_win.left_offset = get_ue_golomb_long(gb) * 2;
539  vui->def_disp_win.right_offset = get_ue_golomb_long(gb) * 2;
540  vui->def_disp_win.top_offset = get_ue_golomb_long(gb) * 2;
541  vui->def_disp_win.bottom_offset = get_ue_golomb_long(gb) * 2;
542 
543  if (s->apply_defdispwin &&
544  s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {
545  av_log(s->avctx, AV_LOG_DEBUG,
546  "discarding vui default display window, "
547  "original values are l:%u r:%u t:%u b:%u\n",
548  vui->def_disp_win.left_offset,
549  vui->def_disp_win.right_offset,
550  vui->def_disp_win.top_offset,
551  vui->def_disp_win.bottom_offset);
552 
553  vui->def_disp_win.left_offset =
554  vui->def_disp_win.right_offset =
555  vui->def_disp_win.top_offset =
556  vui->def_disp_win.bottom_offset = 0;
557  }
558  }
559 
560  vui->vui_timing_info_present_flag = get_bits1(gb);
561 
562  if (vui->vui_timing_info_present_flag) {
563  if( get_bits_left(gb) < 66) {
564  // The alternate syntax seem to have timing info located
565  // at where def_disp_win is normally located
566  av_log(s->avctx, AV_LOG_WARNING,
567  "Strange VUI timing information, retrying...\n");
568  vui->default_display_window_flag = 0;
569  memset(&vui->def_disp_win, 0, sizeof(vui->def_disp_win));
570  memcpy(gb, &backup, sizeof(backup));
571  alt = 1;
572  }
573  vui->vui_num_units_in_tick = get_bits_long(gb, 32);
574  vui->vui_time_scale = get_bits_long(gb, 32);
575  if (alt) {
576  av_log(s->avctx, AV_LOG_INFO, "Retry got %i/%i fps\n",
577  vui->vui_time_scale, vui->vui_num_units_in_tick);
578  }
579  vui->vui_poc_proportional_to_timing_flag = get_bits1(gb);
580  if (vui->vui_poc_proportional_to_timing_flag)
581  vui->vui_num_ticks_poc_diff_one_minus1 = get_ue_golomb_long(gb);
582  vui->vui_hrd_parameters_present_flag = get_bits1(gb);
583  if (vui->vui_hrd_parameters_present_flag)
584  decode_hrd(s, 1, sps->max_sub_layers);
585  }
586 
587  vui->bitstream_restriction_flag = get_bits1(gb);
588  if (vui->bitstream_restriction_flag) {
589  vui->tiles_fixed_structure_flag = get_bits1(gb);
590  vui->motion_vectors_over_pic_boundaries_flag = get_bits1(gb);
591  vui->restricted_ref_pic_lists_flag = get_bits1(gb);
592  vui->min_spatial_segmentation_idc = get_ue_golomb_long(gb);
593  vui->max_bytes_per_pic_denom = get_ue_golomb_long(gb);
594  vui->max_bits_per_min_cu_denom = get_ue_golomb_long(gb);
595  vui->log2_max_mv_length_horizontal = get_ue_golomb_long(gb);
596  vui->log2_max_mv_length_vertical = get_ue_golomb_long(gb);
597  }
598 }
599 
600 static void set_default_scaling_list_data(ScalingList *sl)
601 {
602  int matrixId;
603 
604  for (matrixId = 0; matrixId < 6; matrixId++) {
605  // 4x4 default is 16
606  memset(sl->sl[0][matrixId], 16, 16);
607  sl->sl_dc[0][matrixId] = 16; // default for 16x16
608  sl->sl_dc[1][matrixId] = 16; // default for 32x32
609  }
610  memcpy(sl->sl[1][0], default_scaling_list_intra, 64);
611  memcpy(sl->sl[1][1], default_scaling_list_intra, 64);
612  memcpy(sl->sl[1][2], default_scaling_list_intra, 64);
613  memcpy(sl->sl[1][3], default_scaling_list_inter, 64);
614  memcpy(sl->sl[1][4], default_scaling_list_inter, 64);
615  memcpy(sl->sl[1][5], default_scaling_list_inter, 64);
616  memcpy(sl->sl[2][0], default_scaling_list_intra, 64);
617  memcpy(sl->sl[2][1], default_scaling_list_intra, 64);
618  memcpy(sl->sl[2][2], default_scaling_list_intra, 64);
619  memcpy(sl->sl[2][3], default_scaling_list_inter, 64);
620  memcpy(sl->sl[2][4], default_scaling_list_inter, 64);
621  memcpy(sl->sl[2][5], default_scaling_list_inter, 64);
622  memcpy(sl->sl[3][0], default_scaling_list_intra, 64);
623  memcpy(sl->sl[3][1], default_scaling_list_intra, 64);
624  memcpy(sl->sl[3][2], default_scaling_list_intra, 64);
625  memcpy(sl->sl[3][3], default_scaling_list_inter, 64);
626  memcpy(sl->sl[3][4], default_scaling_list_inter, 64);
627  memcpy(sl->sl[3][5], default_scaling_list_inter, 64);
628 }
629 
630 static int scaling_list_data(HEVCContext *s, ScalingList *sl, HEVCSPS *sps)
631 {
632  GetBitContext *gb = &s->HEVClc->gb;
633  uint8_t scaling_list_pred_mode_flag;
634  int32_t scaling_list_dc_coef[2][6];
635  int size_id, matrix_id, pos;
636  int i;
637 
638  for (size_id = 0; size_id < 4; size_id++)
639  for (matrix_id = 0; matrix_id < 6; matrix_id += ((size_id == 3) ? 3 : 1)) {
640  scaling_list_pred_mode_flag = get_bits1(gb);
641  if (!scaling_list_pred_mode_flag) {
642  unsigned int delta = get_ue_golomb_long(gb);
643  /* Only need to handle non-zero delta. Zero means default,
644  * which should already be in the arrays. */
645  if (delta) {
646  // Copy from previous array.
647  if (matrix_id < delta) {
648  av_log(s->avctx, AV_LOG_ERROR,
649  "Invalid delta in scaling list data: %d.\n", delta);
650  return AVERROR_INVALIDDATA;
651  }
652 
653  memcpy(sl->sl[size_id][matrix_id],
654  sl->sl[size_id][matrix_id - delta],
655  size_id > 0 ? 64 : 16);
656  if (size_id > 1)
657  sl->sl_dc[size_id - 2][matrix_id] = sl->sl_dc[size_id - 2][matrix_id - delta];
658  }
659  } else {
660  int next_coef, coef_num;
661  int32_t scaling_list_delta_coef;
662 
663  next_coef = 8;
664  coef_num = FFMIN(64, 1 << (4 + (size_id << 1)));
665  if (size_id > 1) {
666  scaling_list_dc_coef[size_id - 2][matrix_id] = get_se_golomb(gb) + 8;
667  next_coef = scaling_list_dc_coef[size_id - 2][matrix_id];
668  sl->sl_dc[size_id - 2][matrix_id] = next_coef;
669  }
670  for (i = 0; i < coef_num; i++) {
671  if (size_id == 0)
672  pos = 4 * ff_hevc_diag_scan4x4_y[i] +
673  ff_hevc_diag_scan4x4_x[i];
674  else
675  pos = 8 * ff_hevc_diag_scan8x8_y[i] +
676  ff_hevc_diag_scan8x8_x[i];
677 
678  scaling_list_delta_coef = get_se_golomb(gb);
679  next_coef = (next_coef + scaling_list_delta_coef + 256) % 256;
680  sl->sl[size_id][matrix_id][pos] = next_coef;
681  }
682  }
683  }
684 
685  if (sps->chroma_format_idc == 3) {
686  for (i = 0; i < 64; i++) {
687  sl->sl[3][1][i] = sl->sl[2][1][i];
688  sl->sl[3][2][i] = sl->sl[2][2][i];
689  sl->sl[3][4][i] = sl->sl[2][4][i];
690  sl->sl[3][5][i] = sl->sl[2][5][i];
691  }
692  sl->sl_dc[1][1] = sl->sl_dc[0][1];
693  sl->sl_dc[1][2] = sl->sl_dc[0][2];
694  sl->sl_dc[1][4] = sl->sl_dc[0][4];
695  sl->sl_dc[1][5] = sl->sl_dc[0][5];
696  }
697 
698 
699  return 0;
700 }
701 
702 int ff_hevc_decode_nal_sps(HEVCContext *s)
703 {
704  const AVPixFmtDescriptor *desc;
705  GetBitContext *gb = &s->HEVClc->gb;
706  int ret = 0;
707  unsigned int sps_id = 0;
708  int log2_diff_max_min_transform_block_size;
709  int bit_depth_chroma, start, vui_present, sublayer_ordering_info;
710  int i;
711 
712  HEVCSPS *sps;
713  AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));
714 
715  if (!sps_buf)
716  return AVERROR(ENOMEM);
717  sps = (HEVCSPS*)sps_buf->data;
718 
719  av_log(s->avctx, AV_LOG_DEBUG, "Decoding SPS\n");
720 
721  // Coded parameters
722 
723  sps->vps_id = get_bits(gb, 4);
724  if (sps->vps_id >= MAX_VPS_COUNT) {
725  av_log(s->avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", sps->vps_id);
726  ret = AVERROR_INVALIDDATA;
727  goto err;
728  }
729 
730  if (!s->vps_list[sps->vps_id]) {
731  av_log(s->avctx, AV_LOG_ERROR, "VPS %d does not exist\n",
732  sps->vps_id);
733  ret = AVERROR_INVALIDDATA;
734  goto err;
735  }
736 
737  sps->max_sub_layers = get_bits(gb, 3) + 1;
738  if (sps->max_sub_layers > MAX_SUB_LAYERS) {
739  av_log(s->avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n",
740  sps->max_sub_layers);
741  ret = AVERROR_INVALIDDATA;
742  goto err;
743  }
744 
745  skip_bits1(gb); // temporal_id_nesting_flag
746 
747  if (parse_ptl(s, &sps->ptl, sps->max_sub_layers) < 0)
748  goto err;
749 
750  sps_id = get_ue_golomb_long(gb);
751  if (sps_id >= MAX_SPS_COUNT) {
752  av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", sps_id);
753  ret = AVERROR_INVALIDDATA;
754  goto err;
755  }
756 
757  sps->chroma_format_idc = get_ue_golomb_long(gb);
758 
759  if (sps->chroma_format_idc == 3)
760  sps->separate_colour_plane_flag = get_bits1(gb);
761 
762  if (sps->separate_colour_plane_flag)
763  sps->chroma_format_idc = 0;
764 
765  sps->width = get_ue_golomb_long(gb);
766  sps->height = get_ue_golomb_long(gb);
767  if ((ret = av_image_check_size(sps->width,
768  sps->height, 0, s->avctx)) < 0)
769  goto err;
770 
771  if (get_bits1(gb)) { // pic_conformance_flag
772  //TODO: * 2 is only valid for 420
773  sps->pic_conf_win.left_offset = get_ue_golomb_long(gb) * 2;
774  sps->pic_conf_win.right_offset = get_ue_golomb_long(gb) * 2;
775  sps->pic_conf_win.top_offset = get_ue_golomb_long(gb) * 2;
776  sps->pic_conf_win.bottom_offset = get_ue_golomb_long(gb) * 2;
777 
778  if (s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {
779  av_log(s->avctx, AV_LOG_DEBUG,
780  "discarding sps conformance window, "
781  "original values are l:%u r:%u t:%u b:%u\n",
782  sps->pic_conf_win.left_offset,
783  sps->pic_conf_win.right_offset,
784  sps->pic_conf_win.top_offset,
785  sps->pic_conf_win.bottom_offset);
786 
787  sps->pic_conf_win.left_offset =
788  sps->pic_conf_win.right_offset =
789  sps->pic_conf_win.top_offset =
790  sps->pic_conf_win.bottom_offset = 0;
791  }
792  sps->output_window = sps->pic_conf_win;
793  }
794 
795  sps->bit_depth = get_ue_golomb_long(gb) + 8;
796  bit_depth_chroma = get_ue_golomb_long(gb) + 8;
797  if (sps->chroma_format_idc && bit_depth_chroma != sps->bit_depth) {
798  av_log(s->avctx, AV_LOG_ERROR,
799  "Luma bit depth (%d) is different from chroma bit depth (%d), "
800  "this is unsupported.\n",
801  sps->bit_depth, bit_depth_chroma);
802  ret = AVERROR_INVALIDDATA;
803  goto err;
804  }
805 
806  switch (sps->bit_depth) {
807  case 8:
808  if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY8;
809  if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P;
810  if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P;
811  if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P;
812  break;
813  case 9:
814  if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;
815  if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P9;
816  if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P9;
817  if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P9;
818  break;
819  case 10:
820  if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;
821  if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P10;
822  if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P10;
823  if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P10;
824  break;
825  case 12:
826  if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;
827  if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P12;
828  if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P12;
829  if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P12;
830  break;
831  default:
832  av_log(s->avctx, AV_LOG_ERROR,
833  "4:2:0, 4:2:2, 4:4:4 supports are currently specified for 8, 10 and 12 bits.\n");
834  ret = AVERROR_PATCHWELCOME;
835  goto err;
836  }
837 
838  desc = av_pix_fmt_desc_get(sps->pix_fmt);
839  if (!desc) {
840  ret = AVERROR(EINVAL);
841  goto err;
842  }
843 
844  sps->hshift[0] = sps->vshift[0] = 0;
845  sps->hshift[2] = sps->hshift[1] = desc->log2_chroma_w;
846  sps->vshift[2] = sps->vshift[1] = desc->log2_chroma_h;
847 
848  sps->pixel_shift = sps->bit_depth > 8;
849 
850  sps->log2_max_poc_lsb = get_ue_golomb_long(gb) + 4;
851  if (sps->log2_max_poc_lsb > 16) {
852  av_log(s->avctx, AV_LOG_ERROR, "log2_max_pic_order_cnt_lsb_minus4 out range: %d\n",
853  sps->log2_max_poc_lsb - 4);
854  ret = AVERROR_INVALIDDATA;
855  goto err;
856  }
857 
858  sublayer_ordering_info = get_bits1(gb);
859  start = sublayer_ordering_info ? 0 : sps->max_sub_layers - 1;
860  for (i = start; i < sps->max_sub_layers; i++) {
861  sps->temporal_layer[i].max_dec_pic_buffering = get_ue_golomb_long(gb) + 1;
862  sps->temporal_layer[i].num_reorder_pics = get_ue_golomb_long(gb);
863  sps->temporal_layer[i].max_latency_increase = get_ue_golomb_long(gb) - 1;
864  if (sps->temporal_layer[i].max_dec_pic_buffering > MAX_DPB_SIZE) {
865  av_log(s->avctx, AV_LOG_ERROR, "sps_max_dec_pic_buffering_minus1 out of range: %d\n",
866  sps->temporal_layer[i].max_dec_pic_buffering - 1);
867  ret = AVERROR_INVALIDDATA;
868  goto err;
869  }
870  if (sps->temporal_layer[i].num_reorder_pics > sps->temporal_layer[i].max_dec_pic_buffering - 1) {
871  av_log(s->avctx, AV_LOG_WARNING, "sps_max_num_reorder_pics out of range: %d\n",
872  sps->temporal_layer[i].num_reorder_pics);
873  if (s->avctx->err_recognition & AV_EF_EXPLODE ||
874  sps->temporal_layer[i].num_reorder_pics > MAX_DPB_SIZE - 1) {
875  ret = AVERROR_INVALIDDATA;
876  goto err;
877  }
878  sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[i].num_reorder_pics + 1;
879  }
880  }
881 
882  if (!sublayer_ordering_info) {
883  for (i = 0; i < start; i++) {
884  sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[start].max_dec_pic_buffering;
885  sps->temporal_layer[i].num_reorder_pics = sps->temporal_layer[start].num_reorder_pics;
886  sps->temporal_layer[i].max_latency_increase = sps->temporal_layer[start].max_latency_increase;
887  }
888  }
889 
890  sps->log2_min_cb_size = get_ue_golomb_long(gb) + 3;
891  sps->log2_diff_max_min_coding_block_size = get_ue_golomb_long(gb);
892  sps->log2_min_tb_size = get_ue_golomb_long(gb) + 2;
893  log2_diff_max_min_transform_block_size = get_ue_golomb_long(gb);
894  sps->log2_max_trafo_size = log2_diff_max_min_transform_block_size +
895  sps->log2_min_tb_size;
896 
897  if (sps->log2_min_cb_size < 3 || sps->log2_min_cb_size > 30) {
898  av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_min_cb_size", sps->log2_min_cb_size);
899  ret = AVERROR_INVALIDDATA;
900  goto err;
901  }
902 
903  if (sps->log2_diff_max_min_coding_block_size > 30) {
904  av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_coding_block_size", sps->log2_diff_max_min_coding_block_size);
905  ret = AVERROR_INVALIDDATA;
906  goto err;
907  }
908 
909  if (sps->log2_min_tb_size >= sps->log2_min_cb_size || sps->log2_min_tb_size < 2) {
910  av_log(s->avctx, AV_LOG_ERROR, "Invalid value for log2_min_tb_size");
911  ret = AVERROR_INVALIDDATA;
912  goto err;
913  }
914 
915  if (log2_diff_max_min_transform_block_size < 0 || log2_diff_max_min_transform_block_size > 30) {
916  av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_transform_block_size", log2_diff_max_min_transform_block_size);
917  ret = AVERROR_INVALIDDATA;
918  goto err;
919  }
920 
921  sps->max_transform_hierarchy_depth_inter = get_ue_golomb_long(gb);
922  sps->max_transform_hierarchy_depth_intra = get_ue_golomb_long(gb);
923 
924  sps->scaling_list_enable_flag = get_bits1(gb);
925  if (sps->scaling_list_enable_flag) {
926  set_default_scaling_list_data(&sps->scaling_list);
927 
928  if (get_bits1(gb)) {
929  ret = scaling_list_data(s, &sps->scaling_list, sps);
930  if (ret < 0)
931  goto err;
932  }
933  }
934 
935  sps->amp_enabled_flag = get_bits1(gb);
936  sps->sao_enabled = get_bits1(gb);
937 
938  sps->pcm_enabled_flag = get_bits1(gb);
939  if (sps->pcm_enabled_flag) {
940  sps->pcm.bit_depth = get_bits(gb, 4) + 1;
941  sps->pcm.bit_depth_chroma = get_bits(gb, 4) + 1;
942  sps->pcm.log2_min_pcm_cb_size = get_ue_golomb_long(gb) + 3;
943  sps->pcm.log2_max_pcm_cb_size = sps->pcm.log2_min_pcm_cb_size +
944  get_ue_golomb_long(gb);
945  if (sps->pcm.bit_depth > sps->bit_depth) {
946  av_log(s->avctx, AV_LOG_ERROR,
947  "PCM bit depth (%d) is greater than normal bit depth (%d)\n",
948  sps->pcm.bit_depth, sps->bit_depth);
949  ret = AVERROR_INVALIDDATA;
950  goto err;
951  }
952 
953  sps->pcm.loop_filter_disable_flag = get_bits1(gb);
954  }
955 
956  sps->nb_st_rps = get_ue_golomb_long(gb);
957  if (sps->nb_st_rps > MAX_SHORT_TERM_RPS_COUNT) {
958  av_log(s->avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",
959  sps->nb_st_rps);
960  ret = AVERROR_INVALIDDATA;
961  goto err;
962  }
963  for (i = 0; i < sps->nb_st_rps; i++) {
964  if ((ret = ff_hevc_decode_short_term_rps(s, &sps->st_rps[i],
965  sps, 0)) < 0)
966  goto err;
967  }
968 
969  sps->long_term_ref_pics_present_flag = get_bits1(gb);
970  if (sps->long_term_ref_pics_present_flag) {
971  sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);
972  if (sps->num_long_term_ref_pics_sps > 31U) {
973  av_log(s->avctx, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",
974  sps->num_long_term_ref_pics_sps);
975  goto err;
976  }
977  for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {
978  sps->lt_ref_pic_poc_lsb_sps[i] = get_bits(gb, sps->log2_max_poc_lsb);
979  sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);
980  }
981  }
982 
983  sps->sps_temporal_mvp_enabled_flag = get_bits1(gb);
984  sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);
985  sps->vui.sar = (AVRational){0, 1};
986  vui_present = get_bits1(gb);
987  if (vui_present)
988  decode_vui(s, sps);
989 
990  if (get_bits1(gb)) { // sps_extension_flag
991  int sps_extension_flag[1];
992  for (i = 0; i < 1; i++)
993  sps_extension_flag[i] = get_bits1(gb);
994  skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);
995  if (sps_extension_flag[0]) {
996  int extended_precision_processing_flag;
997  int high_precision_offsets_enabled_flag;
998  int cabac_bypass_alignment_enabled_flag;
999 
1000  sps->transform_skip_rotation_enabled_flag = get_bits1(gb);
1001  sps->transform_skip_context_enabled_flag = get_bits1(gb);
1002  sps->implicit_rdpcm_enabled_flag = get_bits1(gb);
1003 
1004  sps->explicit_rdpcm_enabled_flag = get_bits1(gb);
1005 
1006  extended_precision_processing_flag = get_bits1(gb);
1007  if (extended_precision_processing_flag)
1008  av_log(s->avctx, AV_LOG_WARNING,
1009  "extended_precision_processing_flag not yet implemented\n");
1010 
1011  sps->intra_smoothing_disabled_flag = get_bits1(gb);
1012  high_precision_offsets_enabled_flag = get_bits1(gb);
1013  if (high_precision_offsets_enabled_flag)
1014  av_log(s->avctx, AV_LOG_WARNING,
1015  "high_precision_offsets_enabled_flag not yet implemented\n");
1016 
1017  sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);
1018 
1019  cabac_bypass_alignment_enabled_flag = get_bits1(gb);
1020  if (cabac_bypass_alignment_enabled_flag)
1021  av_log(s->avctx, AV_LOG_WARNING,
1022  "cabac_bypass_alignment_enabled_flag not yet implemented\n");
1023  }
1024  }
1025  if (s->apply_defdispwin) {
1026  sps->output_window.left_offset += sps->vui.def_disp_win.left_offset;
1027  sps->output_window.right_offset += sps->vui.def_disp_win.right_offset;
1028  sps->output_window.top_offset += sps->vui.def_disp_win.top_offset;
1029  sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;
1030  }
1031  if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) &&
1032  !(s->avctx->flags & CODEC_FLAG_UNALIGNED)) {
1033  sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));
1034  av_log(s->avctx, AV_LOG_WARNING, "Reducing left output window to %d "
1035  "chroma samples to preserve alignment.\n",
1036  sps->output_window.left_offset);
1037  }
1038  sps->output_width = sps->width -
1039  (sps->output_window.left_offset + sps->output_window.right_offset);
1040  sps->output_height = sps->height -
1041  (sps->output_window.top_offset + sps->output_window.bottom_offset);
1042  if (sps->output_width <= 0 || sps->output_height <= 0) {
1043  av_log(s->avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",
1044  sps->output_width, sps->output_height);
1045  if (s->avctx->err_recognition & AV_EF_EXPLODE) {
1046  ret = AVERROR_INVALIDDATA;
1047  goto err;
1048  }
1049  av_log(s->avctx, AV_LOG_WARNING,
1050  "Displaying the whole video surface.\n");
1051  memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));
1052  memset(&sps->output_window, 0, sizeof(sps->output_window));
1053  sps->output_width = sps->width;
1054  sps->output_height = sps->height;
1055  }
1056 
1057  // Inferred parameters
1058  sps->log2_ctb_size = sps->log2_min_cb_size +
1059  sps->log2_diff_max_min_coding_block_size;
1060  sps->log2_min_pu_size = sps->log2_min_cb_size - 1;
1061 
1062  sps->ctb_width = (sps->width + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;
1063  sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;
1064  sps->ctb_size = sps->ctb_width * sps->ctb_height;
1065 
1066  sps->min_cb_width = sps->width >> sps->log2_min_cb_size;
1067  sps->min_cb_height = sps->height >> sps->log2_min_cb_size;
1068  sps->min_tb_width = sps->width >> sps->log2_min_tb_size;
1069  sps->min_tb_height = sps->height >> sps->log2_min_tb_size;
1070  sps->min_pu_width = sps->width >> sps->log2_min_pu_size;
1071  sps->min_pu_height = sps->height >> sps->log2_min_pu_size;
1072  sps->tb_mask = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;
1073 
1074  sps->qp_bd_offset = 6 * (sps->bit_depth - 8);
1075 
1076  if (sps->width & ((1 << sps->log2_min_cb_size) - 1) ||
1077  sps->height & ((1 << sps->log2_min_cb_size) - 1)) {
1078  av_log(s->avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");
1079  goto err;
1080  }
1081 
1082  if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {
1083  av_log(s->avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);
1084  goto err;
1085  }
1086  if (sps->log2_ctb_size < 4) {
1087  av_log(s->avctx,
1088  AV_LOG_ERROR,
1089  "log2_ctb_size %d differs from the bounds of any known profile\n",
1090  sps->log2_ctb_size);
1091  avpriv_request_sample(s->avctx, "log2_ctb_size %d", sps->log2_ctb_size);
1092  goto err;
1093  }
1094  if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {
1095  av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",
1096  sps->max_transform_hierarchy_depth_inter);
1097  goto err;
1098  }
1099  if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {
1100  av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",
1101  sps->max_transform_hierarchy_depth_intra);
1102  goto err;
1103  }
1104  if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {
1105  av_log(s->avctx, AV_LOG_ERROR,
1106  "max transform block size out of range: %d\n",
1107  sps->log2_max_trafo_size);
1108  goto err;
1109  }
1110 
1111  if (get_bits_left(gb) < 0) {
1112  av_log(s->avctx, AV_LOG_ERROR,
1113  "Overread SPS by %d bits\n", -get_bits_left(gb));
1114  goto err;
1115  }
1116 
1117  if (s->avctx->debug & FF_DEBUG_BITSTREAM) {
1118  av_log(s->avctx, AV_LOG_DEBUG,
1119  "Parsed SPS: id %d; coded wxh: %dx%d; "
1120  "cropped wxh: %dx%d; pix_fmt: %s.\n",
1121  sps_id, sps->width, sps->height,
1122  sps->output_width, sps->output_height,
1123  av_get_pix_fmt_name(sps->pix_fmt));
1124  }
1125 
1126  /* check if this is a repeat of an already parsed SPS, then keep the
1127  * original one.
1128  * otherwise drop all PPSes that depend on it */
1129  if (s->sps_list[sps_id] &&
1130  !memcmp(s->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
1131  av_buffer_unref(&sps_buf);
1132  } else {
1133  for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++) {
1134  if (s->pps_list[i] && ((HEVCPPS*)s->pps_list[i]->data)->sps_id == sps_id)
1135  av_buffer_unref(&s->pps_list[i]);
1136  }
1137  if (s->sps_list[sps_id] && s->sps == (HEVCSPS*)s->sps_list[sps_id]->data) {
1138  av_buffer_unref(&s->current_sps);
1139  s->current_sps = av_buffer_ref(s->sps_list[sps_id]);
1140  if (!s->current_sps)
1141  s->sps = NULL;
1142  }
1143  av_buffer_unref(&s->sps_list[sps_id]);
1144  s->sps_list[sps_id] = sps_buf;
1145  }
1146 
1147  return 0;
1148 
1149 err:
1150  av_buffer_unref(&sps_buf);
1151  return ret;
1152 }
1153 
1154 static void hevc_pps_free(void *opaque, uint8_t *data)
1155 {
1156  HEVCPPS *pps = (HEVCPPS*)data;
1157 
1158  av_freep(&pps->column_width);
1159  av_freep(&pps->row_height);
1160  av_freep(&pps->col_bd);
1161  av_freep(&pps->row_bd);
1162  av_freep(&pps->col_idxX);
1163  av_freep(&pps->ctb_addr_rs_to_ts);
1164  av_freep(&pps->ctb_addr_ts_to_rs);
1165  av_freep(&pps->tile_pos_rs);
1166  av_freep(&pps->tile_id);
1167  av_freep(&pps->min_tb_addr_zs_tab);
1168 
1169  av_freep(&pps);
1170 }
1171 
1172 static int pps_range_extensions(HEVCContext *s, HEVCPPS *pps, HEVCSPS *sps) {
1173  GetBitContext *gb = &s->HEVClc->gb;
1174  int i;
1175 
1176  if (pps->transform_skip_enabled_flag) {
1177  pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;
1178  }
1179  pps->cross_component_prediction_enabled_flag = get_bits1(gb);
1180  pps->chroma_qp_offset_list_enabled_flag = get_bits1(gb);
1181  if (pps->chroma_qp_offset_list_enabled_flag) {
1182  pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);
1183  pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);
1184  if (pps->chroma_qp_offset_list_len_minus1 && pps->chroma_qp_offset_list_len_minus1 >= 5) {
1185  av_log(s->avctx, AV_LOG_ERROR,
1186  "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");
1187  return AVERROR_INVALIDDATA;
1188  }
1189  for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {
1190  pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);
1191  if (pps->cb_qp_offset_list[i]) {
1192  av_log(s->avctx, AV_LOG_WARNING,
1193  "cb_qp_offset_list not tested yet.\n");
1194  }
1195  pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);
1196  if (pps->cr_qp_offset_list[i]) {
1197  av_log(s->avctx, AV_LOG_WARNING,
1198  "cb_qp_offset_list not tested yet.\n");
1199  }
1200  }
1201  }
1202  pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);
1203  pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);
1204 
1205  return(0);
1206 }
1207 
1208 int ff_hevc_decode_nal_pps(HEVCContext *s)
1209 {
1210  GetBitContext *gb = &s->HEVClc->gb;
1211  HEVCSPS *sps = NULL;
1212  int pic_area_in_ctbs;
1213  int log2_diff_ctb_min_tb_size;
1214  int i, j, x, y, ctb_addr_rs, tile_id;
1215  int ret = 0;
1216  unsigned int pps_id = 0;
1217 
1218  AVBufferRef *pps_buf;
1219  HEVCPPS *pps = av_mallocz(sizeof(*pps));
1220 
1221  if (!pps)
1222  return AVERROR(ENOMEM);
1223 
1224  pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),
1225  hevc_pps_free, NULL, 0);
1226  if (!pps_buf) {
1227  av_freep(&pps);
1228  return AVERROR(ENOMEM);
1229  }
1230 
1231  av_log(s->avctx, AV_LOG_DEBUG, "Decoding PPS\n");
1232 
1233  // Default values
1234  pps->loop_filter_across_tiles_enabled_flag = 1;
1235  pps->num_tile_columns = 1;
1236  pps->num_tile_rows = 1;
1237  pps->uniform_spacing_flag = 1;
1238  pps->disable_dbf = 0;
1239  pps->beta_offset = 0;
1240  pps->tc_offset = 0;
1241  pps->log2_max_transform_skip_block_size = 2;
1242 
1243  // Coded parameters
1244  pps_id = get_ue_golomb_long(gb);
1245  if (pps_id >= MAX_PPS_COUNT) {
1246  av_log(s->avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);
1247  ret = AVERROR_INVALIDDATA;
1248  goto err;
1249  }
1250  pps->sps_id = get_ue_golomb_long(gb);
1251  if (pps->sps_id >= MAX_SPS_COUNT) {
1252  av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);
1253  ret = AVERROR_INVALIDDATA;
1254  goto err;
1255  }
1256  if (!s->sps_list[pps->sps_id]) {
1257  av_log(s->avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);
1258  ret = AVERROR_INVALIDDATA;
1259  goto err;
1260  }
1261  sps = (HEVCSPS *)s->sps_list[pps->sps_id]->data;
1262 
1263  pps->dependent_slice_segments_enabled_flag = get_bits1(gb);
1264  pps->output_flag_present_flag = get_bits1(gb);
1265  pps->num_extra_slice_header_bits = get_bits(gb, 3);
1266 
1267  pps->sign_data_hiding_flag = get_bits1(gb);
1268 
1269  pps->cabac_init_present_flag = get_bits1(gb);
1270 
1271  pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;
1272  pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;
1273 
1274  pps->pic_init_qp_minus26 = get_se_golomb(gb);
1275 
1276  pps->constrained_intra_pred_flag = get_bits1(gb);
1277  pps->transform_skip_enabled_flag = get_bits1(gb);
1278 
1279  pps->cu_qp_delta_enabled_flag = get_bits1(gb);
1280  pps->diff_cu_qp_delta_depth = 0;
1281  if (pps->cu_qp_delta_enabled_flag)
1282  pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);
1283 
1284  if (pps->diff_cu_qp_delta_depth < 0 ||
1285  pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {
1286  av_log(s->avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",
1287  pps->diff_cu_qp_delta_depth);
1288  ret = AVERROR_INVALIDDATA;
1289  goto err;
1290  }
1291 
1292  pps->cb_qp_offset = get_se_golomb(gb);
1293  if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {
1294  av_log(s->avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",
1295  pps->cb_qp_offset);
1296  ret = AVERROR_INVALIDDATA;
1297  goto err;
1298  }
1299  pps->cr_qp_offset = get_se_golomb(gb);
1300  if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {
1301  av_log(s->avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",
1302  pps->cr_qp_offset);
1303  ret = AVERROR_INVALIDDATA;
1304  goto err;
1305  }
1306  pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);
1307 
1308  pps->weighted_pred_flag = get_bits1(gb);
1309  pps->weighted_bipred_flag = get_bits1(gb);
1310 
1311  pps->transquant_bypass_enable_flag = get_bits1(gb);
1312  pps->tiles_enabled_flag = get_bits1(gb);
1313  pps->entropy_coding_sync_enabled_flag = get_bits1(gb);
1314 
1315  if (pps->tiles_enabled_flag) {
1316  pps->num_tile_columns = get_ue_golomb_long(gb) + 1;
1317  pps->num_tile_rows = get_ue_golomb_long(gb) + 1;
1318  if (pps->num_tile_columns == 0 ||
1319  pps->num_tile_columns >= sps->width) {
1320  av_log(s->avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",
1321  pps->num_tile_columns - 1);
1322  ret = AVERROR_INVALIDDATA;
1323  goto err;
1324  }
1325  if (pps->num_tile_rows == 0 ||
1326  pps->num_tile_rows >= sps->height) {
1327  av_log(s->avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",
1328  pps->num_tile_rows - 1);
1329  ret = AVERROR_INVALIDDATA;
1330  goto err;
1331  }
1332 
1333  pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));
1334  pps->row_height = av_malloc_array(pps->num_tile_rows, sizeof(*pps->row_height));
1335  if (!pps->column_width || !pps->row_height) {
1336  ret = AVERROR(ENOMEM);
1337  goto err;
1338  }
1339 
1340  pps->uniform_spacing_flag = get_bits1(gb);
1341  if (!pps->uniform_spacing_flag) {
1342  uint64_t sum = 0;
1343  for (i = 0; i < pps->num_tile_columns - 1; i++) {
1344  pps->column_width[i] = get_ue_golomb_long(gb) + 1;
1345  sum += pps->column_width[i];
1346  }
1347  if (sum >= sps->ctb_width) {
1348  av_log(s->avctx, AV_LOG_ERROR, "Invalid tile widths.\n");
1349  ret = AVERROR_INVALIDDATA;
1350  goto err;
1351  }
1352  pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;
1353 
1354  sum = 0;
1355  for (i = 0; i < pps->num_tile_rows - 1; i++) {
1356  pps->row_height[i] = get_ue_golomb_long(gb) + 1;
1357  sum += pps->row_height[i];
1358  }
1359  if (sum >= sps->ctb_height) {
1360  av_log(s->avctx, AV_LOG_ERROR, "Invalid tile heights.\n");
1361  ret = AVERROR_INVALIDDATA;
1362  goto err;
1363  }
1364  pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;
1365  }
1366  pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);
1367  }
1368 
1369  pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);
1370 
1371  pps->deblocking_filter_control_present_flag = get_bits1(gb);
1372  if (pps->deblocking_filter_control_present_flag) {
1373  pps->deblocking_filter_override_enabled_flag = get_bits1(gb);
1374  pps->disable_dbf = get_bits1(gb);
1375  if (!pps->disable_dbf) {
1376  pps->beta_offset = get_se_golomb(gb) * 2;
1377  pps->tc_offset = get_se_golomb(gb) * 2;
1378  if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {
1379  av_log(s->avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",
1380  pps->beta_offset/2);
1381  ret = AVERROR_INVALIDDATA;
1382  goto err;
1383  }
1384  if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {
1385  av_log(s->avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",
1386  pps->tc_offset/2);
1387  ret = AVERROR_INVALIDDATA;
1388  goto err;
1389  }
1390  }
1391  }
1392 
1393  pps->scaling_list_data_present_flag = get_bits1(gb);
1394  if (pps->scaling_list_data_present_flag) {
1395  set_default_scaling_list_data(&pps->scaling_list);
1396  ret = scaling_list_data(s, &pps->scaling_list, sps);
1397  if (ret < 0)
1398  goto err;
1399  }
1400  pps->lists_modification_present_flag = get_bits1(gb);
1401  pps->log2_parallel_merge_level = get_ue_golomb_long(gb) + 2;
1402  if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {
1403  av_log(s->avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",
1404  pps->log2_parallel_merge_level - 2);
1405  ret = AVERROR_INVALIDDATA;
1406  goto err;
1407  }
1408 
1409  pps->slice_header_extension_present_flag = get_bits1(gb);
1410 
1411  if (get_bits1(gb)) { // pps_extension_present_flag
1412  int pps_range_extensions_flag = get_bits1(gb);
1413  /* int pps_extension_7bits = */ get_bits(gb, 7);
1414  if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {
1415  if ((ret = pps_range_extensions(s, pps, sps)) < 0)
1416  goto err;
1417  }
1418  }
1419 
1420  // Inferred parameters
1421  pps->col_bd = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));
1422  pps->row_bd = av_malloc_array(pps->num_tile_rows + 1, sizeof(*pps->row_bd));
1423  pps->col_idxX = av_malloc_array(sps->ctb_width, sizeof(*pps->col_idxX));
1424  if (!pps->col_bd || !pps->row_bd || !pps->col_idxX) {
1425  ret = AVERROR(ENOMEM);
1426  goto err;
1427  }
1428 
1429  if (pps->uniform_spacing_flag) {
1430  if (!pps->column_width) {
1431  pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));
1432  pps->row_height = av_malloc_array(pps->num_tile_rows, sizeof(*pps->row_height));
1433  }
1434  if (!pps->column_width || !pps->row_height) {
1435  ret = AVERROR(ENOMEM);
1436  goto err;
1437  }
1438 
1439  for (i = 0; i < pps->num_tile_columns; i++) {
1440  pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -
1441  (i * sps->ctb_width) / pps->num_tile_columns;
1442  }
1443 
1444  for (i = 0; i < pps->num_tile_rows; i++) {
1445  pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -
1446  (i * sps->ctb_height) / pps->num_tile_rows;
1447  }
1448  }
1449 
1450  pps->col_bd[0] = 0;
1451  for (i = 0; i < pps->num_tile_columns; i++)
1452  pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];
1453 
1454  pps->row_bd[0] = 0;
1455  for (i = 0; i < pps->num_tile_rows; i++)
1456  pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];
1457 
1458  for (i = 0, j = 0; i < sps->ctb_width; i++) {
1459  if (i > pps->col_bd[j])
1460  j++;
1461  pps->col_idxX[i] = j;
1462  }
1463 
1464  /**
1465  * 6.5
1466  */
1467  pic_area_in_ctbs = sps->ctb_width * sps->ctb_height;
1468 
1469  pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->ctb_addr_rs_to_ts));
1470  pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->ctb_addr_ts_to_rs));
1471  pps->tile_id = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->tile_id));
1472  pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));
1473  if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||
1474  !pps->tile_id || !pps->min_tb_addr_zs_tab) {
1475  ret = AVERROR(ENOMEM);
1476  goto err;
1477  }
1478 
1479  for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {
1480  int tb_x = ctb_addr_rs % sps->ctb_width;
1481  int tb_y = ctb_addr_rs / sps->ctb_width;
1482  int tile_x = 0;
1483  int tile_y = 0;
1484  int val = 0;
1485 
1486  for (i = 0; i < pps->num_tile_columns; i++) {
1487  if (tb_x < pps->col_bd[i + 1]) {
1488  tile_x = i;
1489  break;
1490  }
1491  }
1492 
1493  for (i = 0; i < pps->num_tile_rows; i++) {
1494  if (tb_y < pps->row_bd[i + 1]) {
1495  tile_y = i;
1496  break;
1497  }
1498  }
1499 
1500  for (i = 0; i < tile_x; i++)
1501  val += pps->row_height[tile_y] * pps->column_width[i];
1502  for (i = 0; i < tile_y; i++)
1503  val += sps->ctb_width * pps->row_height[i];
1504 
1505  val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +
1506  tb_x - pps->col_bd[tile_x];
1507 
1508  pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;
1509  pps->ctb_addr_ts_to_rs[val] = ctb_addr_rs;
1510  }
1511 
1512  for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)
1513  for (i = 0; i < pps->num_tile_columns; i++, tile_id++)
1514  for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)
1515  for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)
1516  pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;
1517 
1518  pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));
1519  if (!pps->tile_pos_rs) {
1520  ret = AVERROR(ENOMEM);
1521  goto err;
1522  }
1523 
1524  for (j = 0; j < pps->num_tile_rows; j++)
1525  for (i = 0; i < pps->num_tile_columns; i++)
1526  pps->tile_pos_rs[j * pps->num_tile_columns + i] = pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];
1527 
1528  log2_diff_ctb_min_tb_size = sps->log2_ctb_size - sps->log2_min_tb_size;
1529  pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];
1530  for (y = 0; y < sps->tb_mask+2; y++) {
1531  pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;
1532  pps->min_tb_addr_zs_tab[y] = -1;
1533  }
1534  for (y = 0; y < sps->tb_mask+1; y++) {
1535  for (x = 0; x < sps->tb_mask+1; x++) {
1536  int tb_x = x >> log2_diff_ctb_min_tb_size;
1537  int tb_y = y >> log2_diff_ctb_min_tb_size;
1538  int ctb_addr_rs = sps->ctb_width * tb_y + tb_x;
1539  int val = pps->ctb_addr_rs_to_ts[ctb_addr_rs] <<
1540  (log2_diff_ctb_min_tb_size * 2);
1541  for (i = 0; i < log2_diff_ctb_min_tb_size; i++) {
1542  int m = 1 << i;
1543  val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);
1544  }
1545  pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;
1546  }
1547  }
1548 
1549  if (get_bits_left(gb) < 0) {
1550  av_log(s->avctx, AV_LOG_ERROR,
1551  "Overread PPS by %d bits\n", -get_bits_left(gb));
1552  goto err;
1553  }
1554 
1555  av_buffer_unref(&s->pps_list[pps_id]);
1556  s->pps_list[pps_id] = pps_buf;
1557 
1558  return 0;
1559 
1560 err:
1561  av_buffer_unref(&pps_buf);
1562  return ret;
1563 }
Generated on Sun Mar 8 2015 02:34:53 for FFmpeg by   doxygen 1.8.2