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