2 * HEVC Parameter Set decoding
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
9 * This file is part of FFmpeg.
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.
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.
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
26 #include "libavutil/imgutils.h"
28 #include "hevc_data.h"
31 static const uint8_t default_scaling_list_intra[] = {
32 16, 16, 16, 16, 17, 18, 21, 24,
33 16, 16, 16, 16, 17, 19, 22, 25,
34 16, 16, 17, 18, 20, 22, 25, 29,
35 16, 16, 18, 21, 24, 27, 31, 36,
36 17, 17, 20, 24, 30, 35, 41, 47,
37 18, 19, 22, 27, 35, 44, 54, 65,
38 21, 22, 25, 31, 41, 54, 70, 88,
39 24, 25, 29, 36, 47, 65, 88, 115
42 static const uint8_t default_scaling_list_inter[] = {
43 16, 16, 16, 16, 17, 18, 20, 24,
44 16, 16, 16, 17, 18, 20, 24, 25,
45 16, 16, 17, 18, 20, 24, 25, 28,
46 16, 17, 18, 20, 24, 25, 28, 33,
47 17, 18, 20, 24, 25, 28, 33, 41,
48 18, 20, 24, 25, 28, 33, 41, 54,
49 20, 24, 25, 28, 33, 41, 54, 71,
50 24, 25, 28, 33, 41, 54, 71, 91
53 static const AVRational vui_sar[] = {
73 static void remove_pps(HEVCParamSets *s, int id)
75 if (s->pps_list[id] && s->pps == (const HEVCPPS*)s->pps_list[id]->data)
77 av_buffer_unref(&s->pps_list[id]);
80 static void remove_sps(HEVCParamSets *s, int id)
83 if (s->sps_list[id]) {
84 if (s->sps == (const HEVCSPS*)s->sps_list[id]->data)
87 /* drop all PPS that depend on this SPS */
88 for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
89 if (s->pps_list[i] && ((HEVCPPS*)s->pps_list[i]->data)->sps_id == id)
92 av_assert0(!(s->sps_list[id] && s->sps == (HEVCSPS*)s->sps_list[id]->data));
94 av_buffer_unref(&s->sps_list[id]);
97 static void remove_vps(HEVCParamSets *s, int id)
100 if (s->vps_list[id]) {
101 if (s->vps == (const HEVCVPS*)s->vps_list[id]->data)
104 for (i = 0; i < FF_ARRAY_ELEMS(s->sps_list); i++)
105 if (s->sps_list[i] && ((HEVCSPS*)s->sps_list[i]->data)->vps_id == id)
108 av_buffer_unref(&s->vps_list[id]);
111 int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx,
112 ShortTermRPS *rps, const HEVCSPS *sps, int is_slice_header)
114 uint8_t rps_predict = 0;
121 if (rps != sps->st_rps && sps->nb_st_rps)
122 rps_predict = get_bits1(gb);
125 const ShortTermRPS *rps_ridx;
127 unsigned abs_delta_rps;
128 uint8_t use_delta_flag = 0;
129 uint8_t delta_rps_sign;
131 if (is_slice_header) {
132 unsigned int delta_idx = get_ue_golomb_long(gb) + 1;
133 if (delta_idx > sps->nb_st_rps) {
134 av_log(avctx, AV_LOG_ERROR,
135 "Invalid value of delta_idx in slice header RPS: %d > %d.\n",
136 delta_idx, sps->nb_st_rps);
137 return AVERROR_INVALIDDATA;
139 rps_ridx = &sps->st_rps[sps->nb_st_rps - delta_idx];
140 rps->rps_idx_num_delta_pocs = rps_ridx->num_delta_pocs;
142 rps_ridx = &sps->st_rps[rps - sps->st_rps - 1];
144 delta_rps_sign = get_bits1(gb);
145 abs_delta_rps = get_ue_golomb_long(gb) + 1;
146 if (abs_delta_rps < 1 || abs_delta_rps > 32768) {
147 av_log(avctx, AV_LOG_ERROR,
148 "Invalid value of abs_delta_rps: %d\n",
150 return AVERROR_INVALIDDATA;
152 delta_rps = (1 - (delta_rps_sign << 1)) * abs_delta_rps;
153 for (i = 0; i <= rps_ridx->num_delta_pocs; i++) {
154 int used = rps->used[k] = get_bits1(gb);
157 use_delta_flag = get_bits1(gb);
159 if (used || use_delta_flag) {
160 if (i < rps_ridx->num_delta_pocs)
161 delta_poc = delta_rps + rps_ridx->delta_poc[i];
163 delta_poc = delta_rps;
164 rps->delta_poc[k] = delta_poc;
173 if (k >= FF_ARRAY_ELEMS(rps->used)) {
174 av_log(avctx, AV_LOG_ERROR,
175 "Invalid num_delta_pocs: %d\n", k);
176 return AVERROR_INVALIDDATA;
179 rps->num_delta_pocs = k;
180 rps->num_negative_pics = k0;
181 // sort in increasing order (smallest first)
182 if (rps->num_delta_pocs != 0) {
184 for (i = 1; i < rps->num_delta_pocs; i++) {
185 delta_poc = rps->delta_poc[i];
187 for (k = i - 1; k >= 0; k--) {
188 tmp = rps->delta_poc[k];
189 if (delta_poc < tmp) {
190 rps->delta_poc[k + 1] = tmp;
191 rps->used[k + 1] = rps->used[k];
192 rps->delta_poc[k] = delta_poc;
198 if ((rps->num_negative_pics >> 1) != 0) {
200 k = rps->num_negative_pics - 1;
201 // flip the negative values to largest first
202 for (i = 0; i < rps->num_negative_pics >> 1; i++) {
203 delta_poc = rps->delta_poc[i];
205 rps->delta_poc[i] = rps->delta_poc[k];
206 rps->used[i] = rps->used[k];
207 rps->delta_poc[k] = delta_poc;
213 unsigned int prev, nb_positive_pics;
214 rps->num_negative_pics = get_ue_golomb_long(gb);
215 nb_positive_pics = get_ue_golomb_long(gb);
217 if (rps->num_negative_pics >= HEVC_MAX_REFS ||
218 nb_positive_pics >= HEVC_MAX_REFS) {
219 av_log(avctx, AV_LOG_ERROR, "Too many refs in a short term RPS.\n");
220 return AVERROR_INVALIDDATA;
223 rps->num_delta_pocs = rps->num_negative_pics + nb_positive_pics;
224 if (rps->num_delta_pocs) {
226 for (i = 0; i < rps->num_negative_pics; i++) {
227 delta_poc = get_ue_golomb_long(gb) + 1;
228 if (delta_poc < 1 || delta_poc > 32768) {
229 av_log(avctx, AV_LOG_ERROR,
230 "Invalid value of delta_poc: %d\n",
232 return AVERROR_INVALIDDATA;
235 rps->delta_poc[i] = prev;
236 rps->used[i] = get_bits1(gb);
239 for (i = 0; i < nb_positive_pics; i++) {
240 delta_poc = get_ue_golomb_long(gb) + 1;
241 if (delta_poc < 1 || delta_poc > 32768) {
242 av_log(avctx, AV_LOG_ERROR,
243 "Invalid value of delta_poc: %d\n",
245 return AVERROR_INVALIDDATA;
248 rps->delta_poc[rps->num_negative_pics + i] = prev;
249 rps->used[rps->num_negative_pics + i] = get_bits1(gb);
257 static int decode_profile_tier_level(GetBitContext *gb, AVCodecContext *avctx,
262 if (get_bits_left(gb) < 2+1+5 + 32 + 4 + 16 + 16 + 12)
265 ptl->profile_space = get_bits(gb, 2);
266 ptl->tier_flag = get_bits1(gb);
267 ptl->profile_idc = get_bits(gb, 5);
268 if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN)
269 av_log(avctx, AV_LOG_DEBUG, "Main profile bitstream\n");
270 else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_10)
271 av_log(avctx, AV_LOG_DEBUG, "Main 10 profile bitstream\n");
272 else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_STILL_PICTURE)
273 av_log(avctx, AV_LOG_DEBUG, "Main Still Picture profile bitstream\n");
274 else if (ptl->profile_idc == FF_PROFILE_HEVC_REXT)
275 av_log(avctx, AV_LOG_DEBUG, "Range Extension profile bitstream\n");
277 av_log(avctx, AV_LOG_WARNING, "Unknown HEVC profile: %d\n", ptl->profile_idc);
279 for (i = 0; i < 32; i++) {
280 ptl->profile_compatibility_flag[i] = get_bits1(gb);
282 if (ptl->profile_idc == 0 && i > 0 && ptl->profile_compatibility_flag[i])
283 ptl->profile_idc = i;
285 ptl->progressive_source_flag = get_bits1(gb);
286 ptl->interlaced_source_flag = get_bits1(gb);
287 ptl->non_packed_constraint_flag = get_bits1(gb);
288 ptl->frame_only_constraint_flag = get_bits1(gb);
290 skip_bits(gb, 16); // XXX_reserved_zero_44bits[0..15]
291 skip_bits(gb, 16); // XXX_reserved_zero_44bits[16..31]
292 skip_bits(gb, 12); // XXX_reserved_zero_44bits[32..43]
297 static int parse_ptl(GetBitContext *gb, AVCodecContext *avctx,
298 PTL *ptl, int max_num_sub_layers)
301 if (decode_profile_tier_level(gb, avctx, &ptl->general_ptl) < 0 ||
302 get_bits_left(gb) < 8 + (8*2 * (max_num_sub_layers - 1 > 0))) {
303 av_log(avctx, AV_LOG_ERROR, "PTL information too short\n");
307 ptl->general_ptl.level_idc = get_bits(gb, 8);
309 for (i = 0; i < max_num_sub_layers - 1; i++) {
310 ptl->sub_layer_profile_present_flag[i] = get_bits1(gb);
311 ptl->sub_layer_level_present_flag[i] = get_bits1(gb);
314 if (max_num_sub_layers - 1> 0)
315 for (i = max_num_sub_layers - 1; i < 8; i++)
316 skip_bits(gb, 2); // reserved_zero_2bits[i]
317 for (i = 0; i < max_num_sub_layers - 1; i++) {
318 if (ptl->sub_layer_profile_present_flag[i] &&
319 decode_profile_tier_level(gb, avctx, &ptl->sub_layer_ptl[i]) < 0) {
320 av_log(avctx, AV_LOG_ERROR,
321 "PTL information for sublayer %i too short\n", i);
324 if (ptl->sub_layer_level_present_flag[i]) {
325 if (get_bits_left(gb) < 8) {
326 av_log(avctx, AV_LOG_ERROR,
327 "Not enough data for sublayer %i level_idc\n", i);
330 ptl->sub_layer_ptl[i].level_idc = get_bits(gb, 8);
337 static void decode_sublayer_hrd(GetBitContext *gb, unsigned int nb_cpb,
338 int subpic_params_present)
342 for (i = 0; i < nb_cpb; i++) {
343 get_ue_golomb_long(gb); // bit_rate_value_minus1
344 get_ue_golomb_long(gb); // cpb_size_value_minus1
346 if (subpic_params_present) {
347 get_ue_golomb_long(gb); // cpb_size_du_value_minus1
348 get_ue_golomb_long(gb); // bit_rate_du_value_minus1
350 skip_bits1(gb); // cbr_flag
354 static int decode_hrd(GetBitContext *gb, int common_inf_present,
357 int nal_params_present = 0, vcl_params_present = 0;
358 int subpic_params_present = 0;
361 if (common_inf_present) {
362 nal_params_present = get_bits1(gb);
363 vcl_params_present = get_bits1(gb);
365 if (nal_params_present || vcl_params_present) {
366 subpic_params_present = get_bits1(gb);
368 if (subpic_params_present) {
369 skip_bits(gb, 8); // tick_divisor_minus2
370 skip_bits(gb, 5); // du_cpb_removal_delay_increment_length_minus1
371 skip_bits(gb, 1); // sub_pic_cpb_params_in_pic_timing_sei_flag
372 skip_bits(gb, 5); // dpb_output_delay_du_length_minus1
375 skip_bits(gb, 4); // bit_rate_scale
376 skip_bits(gb, 4); // cpb_size_scale
378 if (subpic_params_present)
379 skip_bits(gb, 4); // cpb_size_du_scale
381 skip_bits(gb, 5); // initial_cpb_removal_delay_length_minus1
382 skip_bits(gb, 5); // au_cpb_removal_delay_length_minus1
383 skip_bits(gb, 5); // dpb_output_delay_length_minus1
387 for (i = 0; i < max_sublayers; i++) {
389 unsigned int nb_cpb = 1;
390 int fixed_rate = get_bits1(gb);
393 fixed_rate = get_bits1(gb);
396 get_ue_golomb_long(gb); // elemental_duration_in_tc_minus1
398 low_delay = get_bits1(gb);
401 nb_cpb = get_ue_golomb_long(gb) + 1;
402 if (nb_cpb < 1 || nb_cpb > 32) {
403 av_log(NULL, AV_LOG_ERROR, "nb_cpb %d invalid\n", nb_cpb);
404 return AVERROR_INVALIDDATA;
408 if (nal_params_present)
409 decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);
410 if (vcl_params_present)
411 decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);
416 int ff_hevc_decode_nal_vps(GetBitContext *gb, AVCodecContext *avctx,
423 AVBufferRef *vps_buf = av_buffer_allocz(sizeof(*vps));
426 return AVERROR(ENOMEM);
427 vps = (HEVCVPS*)vps_buf->data;
429 av_log(avctx, AV_LOG_DEBUG, "Decoding VPS\n");
431 nal_size = gb->buffer_end - gb->buffer;
432 if (nal_size > sizeof(vps->data)) {
433 av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized VPS "
434 "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",
435 nal_size, sizeof(vps->data));
436 vps->data_size = sizeof(vps->data);
438 vps->data_size = nal_size;
440 memcpy(vps->data, gb->buffer, vps->data_size);
442 vps_id = get_bits(gb, 4);
443 if (vps_id >= HEVC_MAX_VPS_COUNT) {
444 av_log(avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", vps_id);
448 if (get_bits(gb, 2) != 3) { // vps_reserved_three_2bits
449 av_log(avctx, AV_LOG_ERROR, "vps_reserved_three_2bits is not three\n");
453 vps->vps_max_layers = get_bits(gb, 6) + 1;
454 vps->vps_max_sub_layers = get_bits(gb, 3) + 1;
455 vps->vps_temporal_id_nesting_flag = get_bits1(gb);
457 if (get_bits(gb, 16) != 0xffff) { // vps_reserved_ffff_16bits
458 av_log(avctx, AV_LOG_ERROR, "vps_reserved_ffff_16bits is not 0xffff\n");
462 if (vps->vps_max_sub_layers > HEVC_MAX_SUB_LAYERS) {
463 av_log(avctx, AV_LOG_ERROR, "vps_max_sub_layers out of range: %d\n",
464 vps->vps_max_sub_layers);
468 if (parse_ptl(gb, avctx, &vps->ptl, vps->vps_max_sub_layers) < 0)
471 vps->vps_sub_layer_ordering_info_present_flag = get_bits1(gb);
473 i = vps->vps_sub_layer_ordering_info_present_flag ? 0 : vps->vps_max_sub_layers - 1;
474 for (; i < vps->vps_max_sub_layers; i++) {
475 vps->vps_max_dec_pic_buffering[i] = get_ue_golomb_long(gb) + 1;
476 vps->vps_num_reorder_pics[i] = get_ue_golomb_long(gb);
477 vps->vps_max_latency_increase[i] = get_ue_golomb_long(gb) - 1;
479 if (vps->vps_max_dec_pic_buffering[i] > HEVC_MAX_DPB_SIZE || !vps->vps_max_dec_pic_buffering[i]) {
480 av_log(avctx, AV_LOG_ERROR, "vps_max_dec_pic_buffering_minus1 out of range: %d\n",
481 vps->vps_max_dec_pic_buffering[i] - 1);
484 if (vps->vps_num_reorder_pics[i] > vps->vps_max_dec_pic_buffering[i] - 1) {
485 av_log(avctx, AV_LOG_WARNING, "vps_max_num_reorder_pics out of range: %d\n",
486 vps->vps_num_reorder_pics[i]);
487 if (avctx->err_recognition & AV_EF_EXPLODE)
492 vps->vps_max_layer_id = get_bits(gb, 6);
493 vps->vps_num_layer_sets = get_ue_golomb_long(gb) + 1;
494 if (vps->vps_num_layer_sets < 1 || vps->vps_num_layer_sets > 1024 ||
495 (vps->vps_num_layer_sets - 1LL) * (vps->vps_max_layer_id + 1LL) > get_bits_left(gb)) {
496 av_log(avctx, AV_LOG_ERROR, "too many layer_id_included_flags\n");
500 for (i = 1; i < vps->vps_num_layer_sets; i++)
501 for (j = 0; j <= vps->vps_max_layer_id; j++)
502 skip_bits(gb, 1); // layer_id_included_flag[i][j]
504 vps->vps_timing_info_present_flag = get_bits1(gb);
505 if (vps->vps_timing_info_present_flag) {
506 vps->vps_num_units_in_tick = get_bits_long(gb, 32);
507 vps->vps_time_scale = get_bits_long(gb, 32);
508 vps->vps_poc_proportional_to_timing_flag = get_bits1(gb);
509 if (vps->vps_poc_proportional_to_timing_flag)
510 vps->vps_num_ticks_poc_diff_one = get_ue_golomb_long(gb) + 1;
511 vps->vps_num_hrd_parameters = get_ue_golomb_long(gb);
512 if (vps->vps_num_hrd_parameters > (unsigned)vps->vps_num_layer_sets) {
513 av_log(avctx, AV_LOG_ERROR,
514 "vps_num_hrd_parameters %d is invalid\n", vps->vps_num_hrd_parameters);
517 for (i = 0; i < vps->vps_num_hrd_parameters; i++) {
518 int common_inf_present = 1;
520 get_ue_golomb_long(gb); // hrd_layer_set_idx
522 common_inf_present = get_bits1(gb);
523 decode_hrd(gb, common_inf_present, vps->vps_max_sub_layers);
526 get_bits1(gb); /* vps_extension_flag */
528 if (get_bits_left(gb) < 0) {
529 av_log(avctx, AV_LOG_ERROR,
530 "Overread VPS by %d bits\n", -get_bits_left(gb));
531 if (ps->vps_list[vps_id])
535 if (ps->vps_list[vps_id] &&
536 !memcmp(ps->vps_list[vps_id]->data, vps_buf->data, vps_buf->size)) {
537 av_buffer_unref(&vps_buf);
539 remove_vps(ps, vps_id);
540 ps->vps_list[vps_id] = vps_buf;
546 av_buffer_unref(&vps_buf);
547 return AVERROR_INVALIDDATA;
550 static void decode_vui(GetBitContext *gb, AVCodecContext *avctx,
551 int apply_defdispwin, HEVCSPS *sps)
553 VUI backup_vui, *vui = &sps->vui;
554 GetBitContext backup;
555 int sar_present, alt = 0;
557 av_log(avctx, AV_LOG_DEBUG, "Decoding VUI\n");
559 sar_present = get_bits1(gb);
561 uint8_t sar_idx = get_bits(gb, 8);
562 if (sar_idx < FF_ARRAY_ELEMS(vui_sar))
563 vui->sar = vui_sar[sar_idx];
564 else if (sar_idx == 255) {
565 vui->sar.num = get_bits(gb, 16);
566 vui->sar.den = get_bits(gb, 16);
568 av_log(avctx, AV_LOG_WARNING,
569 "Unknown SAR index: %u.\n", sar_idx);
572 vui->overscan_info_present_flag = get_bits1(gb);
573 if (vui->overscan_info_present_flag)
574 vui->overscan_appropriate_flag = get_bits1(gb);
576 vui->video_signal_type_present_flag = get_bits1(gb);
577 if (vui->video_signal_type_present_flag) {
578 vui->video_format = get_bits(gb, 3);
579 vui->video_full_range_flag = get_bits1(gb);
580 vui->colour_description_present_flag = get_bits1(gb);
581 if (vui->video_full_range_flag && sps->pix_fmt == AV_PIX_FMT_YUV420P)
582 sps->pix_fmt = AV_PIX_FMT_YUVJ420P;
583 if (vui->colour_description_present_flag) {
584 vui->colour_primaries = get_bits(gb, 8);
585 vui->transfer_characteristic = get_bits(gb, 8);
586 vui->matrix_coeffs = get_bits(gb, 8);
588 // Set invalid values to "unspecified"
589 if (!av_color_primaries_name(vui->colour_primaries))
590 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;
591 if (!av_color_transfer_name(vui->transfer_characteristic))
592 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;
593 if (!av_color_space_name(vui->matrix_coeffs))
594 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;
595 if (vui->matrix_coeffs == AVCOL_SPC_RGB) {
596 switch (sps->pix_fmt) {
597 case AV_PIX_FMT_YUV444P:
598 sps->pix_fmt = AV_PIX_FMT_GBRP;
600 case AV_PIX_FMT_YUV444P10:
601 sps->pix_fmt = AV_PIX_FMT_GBRP10;
603 case AV_PIX_FMT_YUV444P12:
604 sps->pix_fmt = AV_PIX_FMT_GBRP12;
611 vui->chroma_loc_info_present_flag = get_bits1(gb);
612 if (vui->chroma_loc_info_present_flag) {
613 vui->chroma_sample_loc_type_top_field = get_ue_golomb_long(gb);
614 vui->chroma_sample_loc_type_bottom_field = get_ue_golomb_long(gb);
617 vui->neutra_chroma_indication_flag = get_bits1(gb);
618 vui->field_seq_flag = get_bits1(gb);
619 vui->frame_field_info_present_flag = get_bits1(gb);
621 // Backup context in case an alternate header is detected
622 memcpy(&backup, gb, sizeof(backup));
623 memcpy(&backup_vui, vui, sizeof(backup_vui));
624 if (get_bits_left(gb) >= 68 && show_bits_long(gb, 21) == 0x100000) {
625 vui->default_display_window_flag = 0;
626 av_log(avctx, AV_LOG_WARNING, "Invalid default display window\n");
628 vui->default_display_window_flag = get_bits1(gb);
630 if (vui->default_display_window_flag) {
631 int vert_mult = 1 + (sps->chroma_format_idc < 2);
632 int horiz_mult = 1 + (sps->chroma_format_idc < 3);
633 vui->def_disp_win.left_offset = get_ue_golomb_long(gb) * horiz_mult;
634 vui->def_disp_win.right_offset = get_ue_golomb_long(gb) * horiz_mult;
635 vui->def_disp_win.top_offset = get_ue_golomb_long(gb) * vert_mult;
636 vui->def_disp_win.bottom_offset = get_ue_golomb_long(gb) * vert_mult;
638 if (apply_defdispwin &&
639 avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
640 av_log(avctx, AV_LOG_DEBUG,
641 "discarding vui default display window, "
642 "original values are l:%u r:%u t:%u b:%u\n",
643 vui->def_disp_win.left_offset,
644 vui->def_disp_win.right_offset,
645 vui->def_disp_win.top_offset,
646 vui->def_disp_win.bottom_offset);
648 vui->def_disp_win.left_offset =
649 vui->def_disp_win.right_offset =
650 vui->def_disp_win.top_offset =
651 vui->def_disp_win.bottom_offset = 0;
656 vui->vui_timing_info_present_flag = get_bits1(gb);
658 if (vui->vui_timing_info_present_flag) {
659 if( get_bits_left(gb) < 66 && !alt) {
660 // The alternate syntax seem to have timing info located
661 // at where def_disp_win is normally located
662 av_log(avctx, AV_LOG_WARNING,
663 "Strange VUI timing information, retrying...\n");
664 memcpy(vui, &backup_vui, sizeof(backup_vui));
665 memcpy(gb, &backup, sizeof(backup));
669 vui->vui_num_units_in_tick = get_bits_long(gb, 32);
670 vui->vui_time_scale = get_bits_long(gb, 32);
672 av_log(avctx, AV_LOG_INFO, "Retry got %"PRIu32"/%"PRIu32" fps\n",
673 vui->vui_time_scale, vui->vui_num_units_in_tick);
675 vui->vui_poc_proportional_to_timing_flag = get_bits1(gb);
676 if (vui->vui_poc_proportional_to_timing_flag)
677 vui->vui_num_ticks_poc_diff_one_minus1 = get_ue_golomb_long(gb);
678 vui->vui_hrd_parameters_present_flag = get_bits1(gb);
679 if (vui->vui_hrd_parameters_present_flag)
680 decode_hrd(gb, 1, sps->max_sub_layers);
683 vui->bitstream_restriction_flag = get_bits1(gb);
684 if (vui->bitstream_restriction_flag) {
685 if (get_bits_left(gb) < 8 && !alt) {
686 av_log(avctx, AV_LOG_WARNING,
687 "Strange VUI bitstream restriction information, retrying"
688 " from timing information...\n");
689 memcpy(vui, &backup_vui, sizeof(backup_vui));
690 memcpy(gb, &backup, sizeof(backup));
694 vui->tiles_fixed_structure_flag = get_bits1(gb);
695 vui->motion_vectors_over_pic_boundaries_flag = get_bits1(gb);
696 vui->restricted_ref_pic_lists_flag = get_bits1(gb);
697 vui->min_spatial_segmentation_idc = get_ue_golomb_long(gb);
698 vui->max_bytes_per_pic_denom = get_ue_golomb_long(gb);
699 vui->max_bits_per_min_cu_denom = get_ue_golomb_long(gb);
700 vui->log2_max_mv_length_horizontal = get_ue_golomb_long(gb);
701 vui->log2_max_mv_length_vertical = get_ue_golomb_long(gb);
704 if (get_bits_left(gb) < 1 && !alt) {
705 // XXX: Alternate syntax when sps_range_extension_flag != 0?
706 av_log(avctx, AV_LOG_WARNING,
707 "Overread in VUI, retrying from timing information...\n");
708 memcpy(vui, &backup_vui, sizeof(backup_vui));
709 memcpy(gb, &backup, sizeof(backup));
715 static void set_default_scaling_list_data(ScalingList *sl)
719 for (matrixId = 0; matrixId < 6; matrixId++) {
721 memset(sl->sl[0][matrixId], 16, 16);
722 sl->sl_dc[0][matrixId] = 16; // default for 16x16
723 sl->sl_dc[1][matrixId] = 16; // default for 32x32
725 memcpy(sl->sl[1][0], default_scaling_list_intra, 64);
726 memcpy(sl->sl[1][1], default_scaling_list_intra, 64);
727 memcpy(sl->sl[1][2], default_scaling_list_intra, 64);
728 memcpy(sl->sl[1][3], default_scaling_list_inter, 64);
729 memcpy(sl->sl[1][4], default_scaling_list_inter, 64);
730 memcpy(sl->sl[1][5], default_scaling_list_inter, 64);
731 memcpy(sl->sl[2][0], default_scaling_list_intra, 64);
732 memcpy(sl->sl[2][1], default_scaling_list_intra, 64);
733 memcpy(sl->sl[2][2], default_scaling_list_intra, 64);
734 memcpy(sl->sl[2][3], default_scaling_list_inter, 64);
735 memcpy(sl->sl[2][4], default_scaling_list_inter, 64);
736 memcpy(sl->sl[2][5], default_scaling_list_inter, 64);
737 memcpy(sl->sl[3][0], default_scaling_list_intra, 64);
738 memcpy(sl->sl[3][1], default_scaling_list_intra, 64);
739 memcpy(sl->sl[3][2], default_scaling_list_intra, 64);
740 memcpy(sl->sl[3][3], default_scaling_list_inter, 64);
741 memcpy(sl->sl[3][4], default_scaling_list_inter, 64);
742 memcpy(sl->sl[3][5], default_scaling_list_inter, 64);
745 static int scaling_list_data(GetBitContext *gb, AVCodecContext *avctx, ScalingList *sl, HEVCSPS *sps)
747 uint8_t scaling_list_pred_mode_flag;
748 int32_t scaling_list_dc_coef[2][6];
749 int size_id, matrix_id, pos;
752 for (size_id = 0; size_id < 4; size_id++)
753 for (matrix_id = 0; matrix_id < 6; matrix_id += ((size_id == 3) ? 3 : 1)) {
754 scaling_list_pred_mode_flag = get_bits1(gb);
755 if (!scaling_list_pred_mode_flag) {
756 unsigned int delta = get_ue_golomb_long(gb);
757 /* Only need to handle non-zero delta. Zero means default,
758 * which should already be in the arrays. */
760 // Copy from previous array.
761 delta *= (size_id == 3) ? 3 : 1;
762 if (matrix_id < delta) {
763 av_log(avctx, AV_LOG_ERROR,
764 "Invalid delta in scaling list data: %d.\n", delta);
765 return AVERROR_INVALIDDATA;
768 memcpy(sl->sl[size_id][matrix_id],
769 sl->sl[size_id][matrix_id - delta],
770 size_id > 0 ? 64 : 16);
772 sl->sl_dc[size_id - 2][matrix_id] = sl->sl_dc[size_id - 2][matrix_id - delta];
775 int next_coef, coef_num;
776 int32_t scaling_list_delta_coef;
779 coef_num = FFMIN(64, 1 << (4 + (size_id << 1)));
781 scaling_list_dc_coef[size_id - 2][matrix_id] = get_se_golomb(gb) + 8;
782 next_coef = scaling_list_dc_coef[size_id - 2][matrix_id];
783 sl->sl_dc[size_id - 2][matrix_id] = next_coef;
785 for (i = 0; i < coef_num; i++) {
787 pos = 4 * ff_hevc_diag_scan4x4_y[i] +
788 ff_hevc_diag_scan4x4_x[i];
790 pos = 8 * ff_hevc_diag_scan8x8_y[i] +
791 ff_hevc_diag_scan8x8_x[i];
793 scaling_list_delta_coef = get_se_golomb(gb);
794 next_coef = (next_coef + 256U + scaling_list_delta_coef) % 256;
795 sl->sl[size_id][matrix_id][pos] = next_coef;
800 if (sps->chroma_format_idc == 3) {
801 for (i = 0; i < 64; i++) {
802 sl->sl[3][1][i] = sl->sl[2][1][i];
803 sl->sl[3][2][i] = sl->sl[2][2][i];
804 sl->sl[3][4][i] = sl->sl[2][4][i];
805 sl->sl[3][5][i] = sl->sl[2][5][i];
807 sl->sl_dc[1][1] = sl->sl_dc[0][1];
808 sl->sl_dc[1][2] = sl->sl_dc[0][2];
809 sl->sl_dc[1][4] = sl->sl_dc[0][4];
810 sl->sl_dc[1][5] = sl->sl_dc[0][5];
817 static int map_pixel_format(AVCodecContext *avctx, HEVCSPS *sps)
819 const AVPixFmtDescriptor *desc;
820 switch (sps->bit_depth) {
822 if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY8;
823 if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P;
824 if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P;
825 if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P;
828 if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;
829 if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P9;
830 if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P9;
831 if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P9;
834 if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY10;
835 if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P10;
836 if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P10;
837 if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P10;
840 if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY12;
841 if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P12;
842 if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P12;
843 if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P12;
846 av_log(avctx, AV_LOG_ERROR,
847 "The following bit-depths are currently specified: 8, 9, 10 and 12 bits, "
848 "chroma_format_idc is %d, depth is %d\n",
849 sps->chroma_format_idc, sps->bit_depth);
850 return AVERROR_INVALIDDATA;
853 desc = av_pix_fmt_desc_get(sps->pix_fmt);
855 return AVERROR(EINVAL);
857 sps->hshift[0] = sps->vshift[0] = 0;
858 sps->hshift[2] = sps->hshift[1] = desc->log2_chroma_w;
859 sps->vshift[2] = sps->vshift[1] = desc->log2_chroma_h;
861 sps->pixel_shift = sps->bit_depth > 8;
866 int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
867 int apply_defdispwin, AVBufferRef **vps_list, AVCodecContext *avctx)
871 int log2_diff_max_min_transform_block_size;
872 int bit_depth_chroma, start, vui_present, sublayer_ordering_info;
877 sps->vps_id = get_bits(gb, 4);
878 if (sps->vps_id >= HEVC_MAX_VPS_COUNT) {
879 av_log(avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", sps->vps_id);
880 return AVERROR_INVALIDDATA;
883 if (vps_list && !vps_list[sps->vps_id]) {
884 av_log(avctx, AV_LOG_ERROR, "VPS %d does not exist\n",
886 return AVERROR_INVALIDDATA;
889 sps->max_sub_layers = get_bits(gb, 3) + 1;
890 if (sps->max_sub_layers > HEVC_MAX_SUB_LAYERS) {
891 av_log(avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n",
892 sps->max_sub_layers);
893 return AVERROR_INVALIDDATA;
896 sps->temporal_id_nesting_flag = get_bits(gb, 1);
898 if ((ret = parse_ptl(gb, avctx, &sps->ptl, sps->max_sub_layers)) < 0)
901 *sps_id = get_ue_golomb_long(gb);
902 if (*sps_id >= HEVC_MAX_SPS_COUNT) {
903 av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", *sps_id);
904 return AVERROR_INVALIDDATA;
907 sps->chroma_format_idc = get_ue_golomb_long(gb);
908 if (sps->chroma_format_idc > 3U) {
909 av_log(avctx, AV_LOG_ERROR, "chroma_format_idc %d is invalid\n", sps->chroma_format_idc);
910 return AVERROR_INVALIDDATA;
913 if (sps->chroma_format_idc == 3)
914 sps->separate_colour_plane_flag = get_bits1(gb);
916 if (sps->separate_colour_plane_flag)
917 sps->chroma_format_idc = 0;
919 sps->width = get_ue_golomb_long(gb);
920 sps->height = get_ue_golomb_long(gb);
921 if ((ret = av_image_check_size(sps->width,
922 sps->height, 0, avctx)) < 0)
925 if (get_bits1(gb)) { // pic_conformance_flag
926 int vert_mult = 1 + (sps->chroma_format_idc < 2);
927 int horiz_mult = 1 + (sps->chroma_format_idc < 3);
928 sps->pic_conf_win.left_offset = get_ue_golomb_long(gb) * horiz_mult;
929 sps->pic_conf_win.right_offset = get_ue_golomb_long(gb) * horiz_mult;
930 sps->pic_conf_win.top_offset = get_ue_golomb_long(gb) * vert_mult;
931 sps->pic_conf_win.bottom_offset = get_ue_golomb_long(gb) * vert_mult;
933 if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
934 av_log(avctx, AV_LOG_DEBUG,
935 "discarding sps conformance window, "
936 "original values are l:%u r:%u t:%u b:%u\n",
937 sps->pic_conf_win.left_offset,
938 sps->pic_conf_win.right_offset,
939 sps->pic_conf_win.top_offset,
940 sps->pic_conf_win.bottom_offset);
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;
947 sps->output_window = sps->pic_conf_win;
950 sps->bit_depth = get_ue_golomb_long(gb) + 8;
951 bit_depth_chroma = get_ue_golomb_long(gb) + 8;
952 if (sps->chroma_format_idc && bit_depth_chroma != sps->bit_depth) {
953 av_log(avctx, AV_LOG_ERROR,
954 "Luma bit depth (%d) is different from chroma bit depth (%d), "
955 "this is unsupported.\n",
956 sps->bit_depth, bit_depth_chroma);
957 return AVERROR_INVALIDDATA;
959 sps->bit_depth_chroma = bit_depth_chroma;
961 ret = map_pixel_format(avctx, sps);
965 sps->log2_max_poc_lsb = get_ue_golomb_long(gb) + 4;
966 if (sps->log2_max_poc_lsb > 16) {
967 av_log(avctx, AV_LOG_ERROR, "log2_max_pic_order_cnt_lsb_minus4 out range: %d\n",
968 sps->log2_max_poc_lsb - 4);
969 return AVERROR_INVALIDDATA;
972 sublayer_ordering_info = get_bits1(gb);
973 start = sublayer_ordering_info ? 0 : sps->max_sub_layers - 1;
974 for (i = start; i < sps->max_sub_layers; i++) {
975 sps->temporal_layer[i].max_dec_pic_buffering = get_ue_golomb_long(gb) + 1;
976 sps->temporal_layer[i].num_reorder_pics = get_ue_golomb_long(gb);
977 sps->temporal_layer[i].max_latency_increase = get_ue_golomb_long(gb) - 1;
978 if (sps->temporal_layer[i].max_dec_pic_buffering > (unsigned)HEVC_MAX_DPB_SIZE) {
979 av_log(avctx, AV_LOG_ERROR, "sps_max_dec_pic_buffering_minus1 out of range: %d\n",
980 sps->temporal_layer[i].max_dec_pic_buffering - 1U);
981 return AVERROR_INVALIDDATA;
983 if (sps->temporal_layer[i].num_reorder_pics > sps->temporal_layer[i].max_dec_pic_buffering - 1) {
984 av_log(avctx, AV_LOG_WARNING, "sps_max_num_reorder_pics out of range: %d\n",
985 sps->temporal_layer[i].num_reorder_pics);
986 if (avctx->err_recognition & AV_EF_EXPLODE ||
987 sps->temporal_layer[i].num_reorder_pics > HEVC_MAX_DPB_SIZE - 1) {
988 return AVERROR_INVALIDDATA;
990 sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[i].num_reorder_pics + 1;
994 if (!sublayer_ordering_info) {
995 for (i = 0; i < start; i++) {
996 sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[start].max_dec_pic_buffering;
997 sps->temporal_layer[i].num_reorder_pics = sps->temporal_layer[start].num_reorder_pics;
998 sps->temporal_layer[i].max_latency_increase = sps->temporal_layer[start].max_latency_increase;
1002 sps->log2_min_cb_size = get_ue_golomb_long(gb) + 3;
1003 sps->log2_diff_max_min_coding_block_size = get_ue_golomb_long(gb);
1004 sps->log2_min_tb_size = get_ue_golomb_long(gb) + 2;
1005 log2_diff_max_min_transform_block_size = get_ue_golomb_long(gb);
1006 sps->log2_max_trafo_size = log2_diff_max_min_transform_block_size +
1007 sps->log2_min_tb_size;
1009 if (sps->log2_min_cb_size < 3 || sps->log2_min_cb_size > 30) {
1010 av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_min_cb_size", sps->log2_min_cb_size);
1011 return AVERROR_INVALIDDATA;
1014 if (sps->log2_diff_max_min_coding_block_size > 30) {
1015 av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_coding_block_size", sps->log2_diff_max_min_coding_block_size);
1016 return AVERROR_INVALIDDATA;
1019 if (sps->log2_min_tb_size >= sps->log2_min_cb_size || sps->log2_min_tb_size < 2) {
1020 av_log(avctx, AV_LOG_ERROR, "Invalid value for log2_min_tb_size");
1021 return AVERROR_INVALIDDATA;
1024 if (log2_diff_max_min_transform_block_size < 0 || log2_diff_max_min_transform_block_size > 30) {
1025 av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_transform_block_size", log2_diff_max_min_transform_block_size);
1026 return AVERROR_INVALIDDATA;
1029 sps->max_transform_hierarchy_depth_inter = get_ue_golomb_long(gb);
1030 sps->max_transform_hierarchy_depth_intra = get_ue_golomb_long(gb);
1032 sps->scaling_list_enable_flag = get_bits1(gb);
1033 if (sps->scaling_list_enable_flag) {
1034 set_default_scaling_list_data(&sps->scaling_list);
1036 if (get_bits1(gb)) {
1037 ret = scaling_list_data(gb, avctx, &sps->scaling_list, sps);
1043 sps->amp_enabled_flag = get_bits1(gb);
1044 sps->sao_enabled = get_bits1(gb);
1046 sps->pcm_enabled_flag = get_bits1(gb);
1047 if (sps->pcm_enabled_flag) {
1048 sps->pcm.bit_depth = get_bits(gb, 4) + 1;
1049 sps->pcm.bit_depth_chroma = get_bits(gb, 4) + 1;
1050 sps->pcm.log2_min_pcm_cb_size = get_ue_golomb_long(gb) + 3;
1051 sps->pcm.log2_max_pcm_cb_size = sps->pcm.log2_min_pcm_cb_size +
1052 get_ue_golomb_long(gb);
1053 if (FFMAX(sps->pcm.bit_depth, sps->pcm.bit_depth_chroma) > sps->bit_depth) {
1054 av_log(avctx, AV_LOG_ERROR,
1055 "PCM bit depth (%d, %d) is greater than normal bit depth (%d)\n",
1056 sps->pcm.bit_depth, sps->pcm.bit_depth_chroma, sps->bit_depth);
1057 return AVERROR_INVALIDDATA;
1060 sps->pcm.loop_filter_disable_flag = get_bits1(gb);
1063 sps->nb_st_rps = get_ue_golomb_long(gb);
1064 if (sps->nb_st_rps > HEVC_MAX_SHORT_TERM_REF_PIC_SETS) {
1065 av_log(avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",
1067 return AVERROR_INVALIDDATA;
1069 for (i = 0; i < sps->nb_st_rps; i++) {
1070 if ((ret = ff_hevc_decode_short_term_rps(gb, avctx, &sps->st_rps[i],
1075 sps->long_term_ref_pics_present_flag = get_bits1(gb);
1076 if (sps->long_term_ref_pics_present_flag) {
1077 sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);
1078 if (sps->num_long_term_ref_pics_sps > 31U) {
1079 av_log(avctx, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",
1080 sps->num_long_term_ref_pics_sps);
1081 return AVERROR_INVALIDDATA;
1083 for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {
1084 sps->lt_ref_pic_poc_lsb_sps[i] = get_bits(gb, sps->log2_max_poc_lsb);
1085 sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);
1089 sps->sps_temporal_mvp_enabled_flag = get_bits1(gb);
1090 sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);
1091 sps->vui.sar = (AVRational){0, 1};
1092 vui_present = get_bits1(gb);
1094 decode_vui(gb, avctx, apply_defdispwin, sps);
1096 if (get_bits1(gb)) { // sps_extension_flag
1097 int sps_extension_flag[1];
1098 for (i = 0; i < 1; i++)
1099 sps_extension_flag[i] = get_bits1(gb);
1100 skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);
1101 if (sps_extension_flag[0]) {
1102 int extended_precision_processing_flag;
1103 int high_precision_offsets_enabled_flag;
1104 int cabac_bypass_alignment_enabled_flag;
1106 sps->transform_skip_rotation_enabled_flag = get_bits1(gb);
1107 sps->transform_skip_context_enabled_flag = get_bits1(gb);
1108 sps->implicit_rdpcm_enabled_flag = get_bits1(gb);
1110 sps->explicit_rdpcm_enabled_flag = get_bits1(gb);
1112 extended_precision_processing_flag = get_bits1(gb);
1113 if (extended_precision_processing_flag)
1114 av_log(avctx, AV_LOG_WARNING,
1115 "extended_precision_processing_flag not yet implemented\n");
1117 sps->intra_smoothing_disabled_flag = get_bits1(gb);
1118 high_precision_offsets_enabled_flag = get_bits1(gb);
1119 if (high_precision_offsets_enabled_flag)
1120 av_log(avctx, AV_LOG_WARNING,
1121 "high_precision_offsets_enabled_flag not yet implemented\n");
1123 sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);
1125 cabac_bypass_alignment_enabled_flag = get_bits1(gb);
1126 if (cabac_bypass_alignment_enabled_flag)
1127 av_log(avctx, AV_LOG_WARNING,
1128 "cabac_bypass_alignment_enabled_flag not yet implemented\n");
1131 if (apply_defdispwin) {
1132 sps->output_window.left_offset += sps->vui.def_disp_win.left_offset;
1133 sps->output_window.right_offset += sps->vui.def_disp_win.right_offset;
1134 sps->output_window.top_offset += sps->vui.def_disp_win.top_offset;
1135 sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;
1138 ow = &sps->output_window;
1139 if (ow->left_offset >= INT_MAX - ow->right_offset ||
1140 ow->top_offset >= INT_MAX - ow->bottom_offset ||
1141 ow->left_offset + ow->right_offset >= sps->width ||
1142 ow->top_offset + ow->bottom_offset >= sps->height) {
1143 av_log(avctx, AV_LOG_WARNING, "Invalid cropping offsets: %u/%u/%u/%u\n",
1144 ow->left_offset, ow->right_offset, ow->top_offset, ow->bottom_offset);
1145 if (avctx->err_recognition & AV_EF_EXPLODE) {
1146 return AVERROR_INVALIDDATA;
1148 av_log(avctx, AV_LOG_WARNING,
1149 "Displaying the whole video surface.\n");
1150 memset(ow, 0, sizeof(*ow));
1151 memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));
1154 // Inferred parameters
1155 sps->log2_ctb_size = sps->log2_min_cb_size +
1156 sps->log2_diff_max_min_coding_block_size;
1157 sps->log2_min_pu_size = sps->log2_min_cb_size - 1;
1159 if (sps->log2_ctb_size > HEVC_MAX_LOG2_CTB_SIZE) {
1160 av_log(avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);
1161 return AVERROR_INVALIDDATA;
1163 if (sps->log2_ctb_size < 4) {
1166 "log2_ctb_size %d differs from the bounds of any known profile\n",
1167 sps->log2_ctb_size);
1168 avpriv_request_sample(avctx, "log2_ctb_size %d", sps->log2_ctb_size);
1169 return AVERROR_INVALIDDATA;
1172 sps->ctb_width = (sps->width + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;
1173 sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;
1174 sps->ctb_size = sps->ctb_width * sps->ctb_height;
1176 sps->min_cb_width = sps->width >> sps->log2_min_cb_size;
1177 sps->min_cb_height = sps->height >> sps->log2_min_cb_size;
1178 sps->min_tb_width = sps->width >> sps->log2_min_tb_size;
1179 sps->min_tb_height = sps->height >> sps->log2_min_tb_size;
1180 sps->min_pu_width = sps->width >> sps->log2_min_pu_size;
1181 sps->min_pu_height = sps->height >> sps->log2_min_pu_size;
1182 sps->tb_mask = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;
1184 sps->qp_bd_offset = 6 * (sps->bit_depth - 8);
1186 if (av_mod_uintp2(sps->width, sps->log2_min_cb_size) ||
1187 av_mod_uintp2(sps->height, sps->log2_min_cb_size)) {
1188 av_log(avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");
1189 return AVERROR_INVALIDDATA;
1192 if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {
1193 av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",
1194 sps->max_transform_hierarchy_depth_inter);
1195 return AVERROR_INVALIDDATA;
1197 if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {
1198 av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",
1199 sps->max_transform_hierarchy_depth_intra);
1200 return AVERROR_INVALIDDATA;
1202 if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {
1203 av_log(avctx, AV_LOG_ERROR,
1204 "max transform block size out of range: %d\n",
1205 sps->log2_max_trafo_size);
1206 return AVERROR_INVALIDDATA;
1209 if (get_bits_left(gb) < 0) {
1210 av_log(avctx, AV_LOG_ERROR,
1211 "Overread SPS by %d bits\n", -get_bits_left(gb));
1212 return AVERROR_INVALIDDATA;
1218 int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,
1219 HEVCParamSets *ps, int apply_defdispwin)
1222 AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));
1223 unsigned int sps_id;
1228 return AVERROR(ENOMEM);
1229 sps = (HEVCSPS*)sps_buf->data;
1231 av_log(avctx, AV_LOG_DEBUG, "Decoding SPS\n");
1233 nal_size = gb->buffer_end - gb->buffer;
1234 if (nal_size > sizeof(sps->data)) {
1235 av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS "
1236 "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",
1237 nal_size, sizeof(sps->data));
1238 sps->data_size = sizeof(sps->data);
1240 sps->data_size = nal_size;
1242 memcpy(sps->data, gb->buffer, sps->data_size);
1244 ret = ff_hevc_parse_sps(sps, gb, &sps_id,
1246 ps->vps_list, avctx);
1248 av_buffer_unref(&sps_buf);
1252 if (avctx->debug & FF_DEBUG_BITSTREAM) {
1253 av_log(avctx, AV_LOG_DEBUG,
1254 "Parsed SPS: id %d; coded wxh: %dx%d; "
1255 "cropped wxh: %dx%d; pix_fmt: %s.\n",
1256 sps_id, sps->width, sps->height,
1257 sps->width - (sps->output_window.left_offset + sps->output_window.right_offset),
1258 sps->height - (sps->output_window.top_offset + sps->output_window.bottom_offset),
1259 av_get_pix_fmt_name(sps->pix_fmt));
1262 /* check if this is a repeat of an already parsed SPS, then keep the
1264 * otherwise drop all PPSes that depend on it */
1265 if (ps->sps_list[sps_id] &&
1266 !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
1267 av_buffer_unref(&sps_buf);
1269 remove_sps(ps, sps_id);
1270 ps->sps_list[sps_id] = sps_buf;
1276 static void hevc_pps_free(void *opaque, uint8_t *data)
1278 HEVCPPS *pps = (HEVCPPS*)data;
1280 av_freep(&pps->column_width);
1281 av_freep(&pps->row_height);
1282 av_freep(&pps->col_bd);
1283 av_freep(&pps->row_bd);
1284 av_freep(&pps->col_idxX);
1285 av_freep(&pps->ctb_addr_rs_to_ts);
1286 av_freep(&pps->ctb_addr_ts_to_rs);
1287 av_freep(&pps->tile_pos_rs);
1288 av_freep(&pps->tile_id);
1289 av_freep(&pps->min_tb_addr_zs_tab);
1294 static int pps_range_extensions(GetBitContext *gb, AVCodecContext *avctx,
1295 HEVCPPS *pps, HEVCSPS *sps) {
1298 if (pps->transform_skip_enabled_flag) {
1299 pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;
1301 pps->cross_component_prediction_enabled_flag = get_bits1(gb);
1302 pps->chroma_qp_offset_list_enabled_flag = get_bits1(gb);
1303 if (pps->chroma_qp_offset_list_enabled_flag) {
1304 pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);
1305 pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);
1306 if (pps->chroma_qp_offset_list_len_minus1 > 5) {
1307 av_log(avctx, AV_LOG_ERROR,
1308 "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");
1309 return AVERROR_INVALIDDATA;
1311 for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {
1312 pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);
1313 if (pps->cb_qp_offset_list[i]) {
1314 av_log(avctx, AV_LOG_WARNING,
1315 "cb_qp_offset_list not tested yet.\n");
1317 pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);
1318 if (pps->cr_qp_offset_list[i]) {
1319 av_log(avctx, AV_LOG_WARNING,
1320 "cb_qp_offset_list not tested yet.\n");
1324 pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);
1325 pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);
1330 static inline int setup_pps(AVCodecContext *avctx, GetBitContext *gb,
1331 HEVCPPS *pps, HEVCSPS *sps)
1334 int pic_area_in_ctbs;
1335 int i, j, x, y, ctb_addr_rs, tile_id;
1337 // Inferred parameters
1338 pps->col_bd = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));
1339 pps->row_bd = av_malloc_array(pps->num_tile_rows + 1, sizeof(*pps->row_bd));
1340 pps->col_idxX = av_malloc_array(sps->ctb_width, sizeof(*pps->col_idxX));
1341 if (!pps->col_bd || !pps->row_bd || !pps->col_idxX)
1342 return AVERROR(ENOMEM);
1344 if (pps->uniform_spacing_flag) {
1345 if (!pps->column_width) {
1346 pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));
1347 pps->row_height = av_malloc_array(pps->num_tile_rows, sizeof(*pps->row_height));
1349 if (!pps->column_width || !pps->row_height)
1350 return AVERROR(ENOMEM);
1352 for (i = 0; i < pps->num_tile_columns; i++) {
1353 pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -
1354 (i * sps->ctb_width) / pps->num_tile_columns;
1357 for (i = 0; i < pps->num_tile_rows; i++) {
1358 pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -
1359 (i * sps->ctb_height) / pps->num_tile_rows;
1364 for (i = 0; i < pps->num_tile_columns; i++)
1365 pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];
1368 for (i = 0; i < pps->num_tile_rows; i++)
1369 pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];
1371 for (i = 0, j = 0; i < sps->ctb_width; i++) {
1372 if (i > pps->col_bd[j])
1374 pps->col_idxX[i] = j;
1380 pic_area_in_ctbs = sps->ctb_width * sps->ctb_height;
1382 pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->ctb_addr_rs_to_ts));
1383 pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->ctb_addr_ts_to_rs));
1384 pps->tile_id = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->tile_id));
1385 pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));
1386 if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||
1387 !pps->tile_id || !pps->min_tb_addr_zs_tab) {
1388 return AVERROR(ENOMEM);
1391 for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {
1392 int tb_x = ctb_addr_rs % sps->ctb_width;
1393 int tb_y = ctb_addr_rs / sps->ctb_width;
1398 for (i = 0; i < pps->num_tile_columns; i++) {
1399 if (tb_x < pps->col_bd[i + 1]) {
1405 for (i = 0; i < pps->num_tile_rows; i++) {
1406 if (tb_y < pps->row_bd[i + 1]) {
1412 for (i = 0; i < tile_x; i++)
1413 val += pps->row_height[tile_y] * pps->column_width[i];
1414 for (i = 0; i < tile_y; i++)
1415 val += sps->ctb_width * pps->row_height[i];
1417 val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +
1418 tb_x - pps->col_bd[tile_x];
1420 pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;
1421 pps->ctb_addr_ts_to_rs[val] = ctb_addr_rs;
1424 for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)
1425 for (i = 0; i < pps->num_tile_columns; i++, tile_id++)
1426 for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)
1427 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)
1428 pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;
1430 pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));
1431 if (!pps->tile_pos_rs)
1432 return AVERROR(ENOMEM);
1434 for (j = 0; j < pps->num_tile_rows; j++)
1435 for (i = 0; i < pps->num_tile_columns; i++)
1436 pps->tile_pos_rs[j * pps->num_tile_columns + i] =
1437 pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];
1439 log2_diff = sps->log2_ctb_size - sps->log2_min_tb_size;
1440 pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];
1441 for (y = 0; y < sps->tb_mask+2; y++) {
1442 pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;
1443 pps->min_tb_addr_zs_tab[y] = -1;
1445 for (y = 0; y < sps->tb_mask+1; y++) {
1446 for (x = 0; x < sps->tb_mask+1; x++) {
1447 int tb_x = x >> log2_diff;
1448 int tb_y = y >> log2_diff;
1449 int rs = sps->ctb_width * tb_y + tb_x;
1450 int val = pps->ctb_addr_rs_to_ts[rs] << (log2_diff * 2);
1451 for (i = 0; i < log2_diff; i++) {
1453 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);
1455 pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;
1462 int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,
1465 HEVCSPS *sps = NULL;
1467 unsigned int pps_id = 0;
1469 unsigned log2_parallel_merge_level_minus2;
1471 AVBufferRef *pps_buf;
1472 HEVCPPS *pps = av_mallocz(sizeof(*pps));
1475 return AVERROR(ENOMEM);
1477 pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),
1478 hevc_pps_free, NULL, 0);
1481 return AVERROR(ENOMEM);
1484 av_log(avctx, AV_LOG_DEBUG, "Decoding PPS\n");
1486 nal_size = gb->buffer_end - gb->buffer;
1487 if (nal_size > sizeof(pps->data)) {
1488 av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "
1489 "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",
1490 nal_size, sizeof(pps->data));
1491 pps->data_size = sizeof(pps->data);
1493 pps->data_size = nal_size;
1495 memcpy(pps->data, gb->buffer, pps->data_size);
1498 pps->loop_filter_across_tiles_enabled_flag = 1;
1499 pps->num_tile_columns = 1;
1500 pps->num_tile_rows = 1;
1501 pps->uniform_spacing_flag = 1;
1502 pps->disable_dbf = 0;
1503 pps->beta_offset = 0;
1505 pps->log2_max_transform_skip_block_size = 2;
1508 pps_id = get_ue_golomb_long(gb);
1509 if (pps_id >= HEVC_MAX_PPS_COUNT) {
1510 av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);
1511 ret = AVERROR_INVALIDDATA;
1514 pps->sps_id = get_ue_golomb_long(gb);
1515 if (pps->sps_id >= HEVC_MAX_SPS_COUNT) {
1516 av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);
1517 ret = AVERROR_INVALIDDATA;
1520 if (!ps->sps_list[pps->sps_id]) {
1521 av_log(avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);
1522 ret = AVERROR_INVALIDDATA;
1525 sps = (HEVCSPS *)ps->sps_list[pps->sps_id]->data;
1527 pps->dependent_slice_segments_enabled_flag = get_bits1(gb);
1528 pps->output_flag_present_flag = get_bits1(gb);
1529 pps->num_extra_slice_header_bits = get_bits(gb, 3);
1531 pps->sign_data_hiding_flag = get_bits1(gb);
1533 pps->cabac_init_present_flag = get_bits1(gb);
1535 pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;
1536 pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;
1538 pps->pic_init_qp_minus26 = get_se_golomb(gb);
1540 pps->constrained_intra_pred_flag = get_bits1(gb);
1541 pps->transform_skip_enabled_flag = get_bits1(gb);
1543 pps->cu_qp_delta_enabled_flag = get_bits1(gb);
1544 pps->diff_cu_qp_delta_depth = 0;
1545 if (pps->cu_qp_delta_enabled_flag)
1546 pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);
1548 if (pps->diff_cu_qp_delta_depth < 0 ||
1549 pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {
1550 av_log(avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",
1551 pps->diff_cu_qp_delta_depth);
1552 ret = AVERROR_INVALIDDATA;
1556 pps->cb_qp_offset = get_se_golomb(gb);
1557 if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {
1558 av_log(avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",
1560 ret = AVERROR_INVALIDDATA;
1563 pps->cr_qp_offset = get_se_golomb(gb);
1564 if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {
1565 av_log(avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",
1567 ret = AVERROR_INVALIDDATA;
1570 pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);
1572 pps->weighted_pred_flag = get_bits1(gb);
1573 pps->weighted_bipred_flag = get_bits1(gb);
1575 pps->transquant_bypass_enable_flag = get_bits1(gb);
1576 pps->tiles_enabled_flag = get_bits1(gb);
1577 pps->entropy_coding_sync_enabled_flag = get_bits1(gb);
1579 if (pps->tiles_enabled_flag) {
1580 pps->num_tile_columns = get_ue_golomb_long(gb) + 1;
1581 pps->num_tile_rows = get_ue_golomb_long(gb) + 1;
1582 if (pps->num_tile_columns <= 0 ||
1583 pps->num_tile_columns >= sps->width) {
1584 av_log(avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",
1585 pps->num_tile_columns - 1);
1586 ret = AVERROR_INVALIDDATA;
1589 if (pps->num_tile_rows <= 0 ||
1590 pps->num_tile_rows >= sps->height) {
1591 av_log(avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",
1592 pps->num_tile_rows - 1);
1593 ret = AVERROR_INVALIDDATA;
1597 pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));
1598 pps->row_height = av_malloc_array(pps->num_tile_rows, sizeof(*pps->row_height));
1599 if (!pps->column_width || !pps->row_height) {
1600 ret = AVERROR(ENOMEM);
1604 pps->uniform_spacing_flag = get_bits1(gb);
1605 if (!pps->uniform_spacing_flag) {
1607 for (i = 0; i < pps->num_tile_columns - 1; i++) {
1608 pps->column_width[i] = get_ue_golomb_long(gb) + 1;
1609 sum += pps->column_width[i];
1611 if (sum >= sps->ctb_width) {
1612 av_log(avctx, AV_LOG_ERROR, "Invalid tile widths.\n");
1613 ret = AVERROR_INVALIDDATA;
1616 pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;
1619 for (i = 0; i < pps->num_tile_rows - 1; i++) {
1620 pps->row_height[i] = get_ue_golomb_long(gb) + 1;
1621 sum += pps->row_height[i];
1623 if (sum >= sps->ctb_height) {
1624 av_log(avctx, AV_LOG_ERROR, "Invalid tile heights.\n");
1625 ret = AVERROR_INVALIDDATA;
1628 pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;
1630 pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);
1633 pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);
1635 pps->deblocking_filter_control_present_flag = get_bits1(gb);
1636 if (pps->deblocking_filter_control_present_flag) {
1637 pps->deblocking_filter_override_enabled_flag = get_bits1(gb);
1638 pps->disable_dbf = get_bits1(gb);
1639 if (!pps->disable_dbf) {
1640 int beta_offset_div2 = get_se_golomb(gb);
1641 int tc_offset_div2 = get_se_golomb(gb) ;
1642 if (beta_offset_div2 < -6 || beta_offset_div2 > 6) {
1643 av_log(avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",
1645 ret = AVERROR_INVALIDDATA;
1648 if (tc_offset_div2 < -6 || tc_offset_div2 > 6) {
1649 av_log(avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",
1651 ret = AVERROR_INVALIDDATA;
1654 pps->beta_offset = 2 * beta_offset_div2;
1655 pps->tc_offset = 2 * tc_offset_div2;
1659 pps->scaling_list_data_present_flag = get_bits1(gb);
1660 if (pps->scaling_list_data_present_flag) {
1661 set_default_scaling_list_data(&pps->scaling_list);
1662 ret = scaling_list_data(gb, avctx, &pps->scaling_list, sps);
1666 pps->lists_modification_present_flag = get_bits1(gb);
1667 log2_parallel_merge_level_minus2 = get_ue_golomb_long(gb);
1668 if (log2_parallel_merge_level_minus2 > sps->log2_ctb_size) {
1669 av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",
1670 log2_parallel_merge_level_minus2);
1671 ret = AVERROR_INVALIDDATA;
1674 pps->log2_parallel_merge_level = log2_parallel_merge_level_minus2 + 2;
1676 pps->slice_header_extension_present_flag = get_bits1(gb);
1678 if (get_bits1(gb)) { // pps_extension_present_flag
1679 int pps_range_extensions_flag = get_bits1(gb);
1680 /* int pps_extension_7bits = */ get_bits(gb, 7);
1681 if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {
1682 if ((ret = pps_range_extensions(gb, avctx, pps, sps)) < 0)
1687 ret = setup_pps(avctx, gb, pps, sps);
1691 if (get_bits_left(gb) < 0) {
1692 av_log(avctx, AV_LOG_ERROR,
1693 "Overread PPS by %d bits\n", -get_bits_left(gb));
1697 remove_pps(ps, pps_id);
1698 ps->pps_list[pps_id] = pps_buf;
1703 av_buffer_unref(&pps_buf);
1707 int ff_hevc_compute_poc(const HEVCSPS *sps, int pocTid0, int poc_lsb, int nal_unit_type)
1709 int max_poc_lsb = 1 << sps->log2_max_poc_lsb;
1710 int prev_poc_lsb = pocTid0 % max_poc_lsb;
1711 int prev_poc_msb = pocTid0 - prev_poc_lsb;
1714 if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)
1715 poc_msb = prev_poc_msb + max_poc_lsb;
1716 else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)
1717 poc_msb = prev_poc_msb - max_poc_lsb;
1719 poc_msb = prev_poc_msb;
1721 // For BLA picture types, POCmsb is set to 0.
1722 if (nal_unit_type == HEVC_NAL_BLA_W_LP ||
1723 nal_unit_type == HEVC_NAL_BLA_W_RADL ||
1724 nal_unit_type == HEVC_NAL_BLA_N_LP)
1727 return poc_msb + poc_lsb;