falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38876 Commits
32 Branches
359MB
Tree: 7cbe1ea9df
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '7cbe1ea9df'
${ noResults }
FFmpeg/libavcodec/hevc_ps.c

1341 lines
50KB
Raw Blame History 

  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 Libav.

  10.  *

  11.  * Libav 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.  * Libav 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 Libav; 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. 

  28. #include "golomb.h"

  29. #include "hevc.h"

  30. 

  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

  40. };

  41. 

  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

  51. };

  52. 

  53. static const AVRational vui_sar[] = {

  54.     {  0,   1 },

  55.     {  1,   1 },

  56.     { 12,  11 },

  57.     { 10,  11 },

  58.     { 16,  11 },

  59.     { 40,  33 },

  60.     { 24,  11 },

  61.     { 20,  11 },

  62.     { 32,  11 },

  63.     { 80,  33 },

  64.     { 18,  11 },

  65.     { 15,  11 },

  66.     { 64,  33 },

  67.     { 160, 99 },

  68.     {  4,   3 },

  69.     {  3,   2 },

  70.     {  2,   1 },

  71. };

  72. 

  73. int ff_hevc_decode_short_term_rps(HEVCContext *s, ShortTermRPS *rps,

  74.                                   const HEVCSPS *sps, int is_slice_header)

  75. {

  76.     HEVCLocalContext *lc = &s->HEVClc;

  77.     uint8_t rps_predict = 0;

  78.     int delta_poc;

  79.     int k0 = 0;

  80.     int k1 = 0;

  81.     int k  = 0;

  82.     int i;

  83. 

  84.     GetBitContext *gb = &lc->gb;

  85. 

  86.     if (rps != sps->st_rps && sps->nb_st_rps)

  87.         rps_predict = get_bits1(gb);

  88. 

  89.     if (rps_predict) {

  90.         const ShortTermRPS *rps_ridx;

  91.         int delta_rps, abs_delta_rps;

  92.         uint8_t use_delta_flag = 0;

  93.         uint8_t delta_rps_sign;

  94. 

  95.         if (is_slice_header) {

  96.             int delta_idx = get_ue_golomb_long(gb) + 1;

  97.             if (delta_idx > sps->nb_st_rps) {

  98.                 av_log(s->avctx, AV_LOG_ERROR,

  99.                        "Invalid value of delta_idx in slice header RPS: %d > %d.\n",

  100.                        delta_idx, sps->nb_st_rps);

  101.                 return AVERROR_INVALIDDATA;

  102.             }

  103.             rps_ridx = &sps->st_rps[sps->nb_st_rps - delta_idx];

  104.         } else

  105.             rps_ridx = &sps->st_rps[rps - sps->st_rps - 1];

  106. 

  107.         delta_rps_sign = get_bits1(gb);

  108.         abs_delta_rps  = get_ue_golomb_long(gb) + 1;

  109.         delta_rps      = (1 - (delta_rps_sign << 1)) * abs_delta_rps;

  110.         for (i = 0; i <= rps_ridx->num_delta_pocs; i++) {

  111.             int used = rps->used[k] = get_bits1(gb);

  112. 

  113.             if (!used)

  114.                 use_delta_flag = get_bits1(gb);

  115. 

  116.             if (used || use_delta_flag) {

  117.                 if (i < rps_ridx->num_delta_pocs)

  118.                     delta_poc = delta_rps + rps_ridx->delta_poc[i];

  119.                 else

  120.                     delta_poc = delta_rps;

  121.                 rps->delta_poc[k] = delta_poc;

  122.                 if (delta_poc < 0)

  123.                     k0++;

  124.                 else

  125.                     k1++;

  126.                 k++;

  127.             }

  128.         }

  129. 

  130.         rps->num_delta_pocs    = k;

  131.         rps->num_negative_pics = k0;

  132.         // sort in increasing order (smallest first)

  133.         if (rps->num_delta_pocs != 0) {

  134.             int used, tmp;

  135.             for (i = 1; i < rps->num_delta_pocs; i++) {

  136.                 delta_poc = rps->delta_poc[i];

  137.                 used      = rps->used[i];

  138.                 for (k = i - 1; k >= 0; k--) {

  139.                     tmp = rps->delta_poc[k];

  140.                     if (delta_poc < tmp) {

  141.                         rps->delta_poc[k + 1] = tmp;

  142.                         rps->used[k + 1]      = rps->used[k];

  143.                         rps->delta_poc[k]     = delta_poc;

  144.                         rps->used[k]          = used;

  145.                     }

  146.                 }

  147.             }

  148.         }

  149.         if ((rps->num_negative_pics >> 1) != 0) {

  150.             int used;

  151.             k = rps->num_negative_pics - 1;

  152.             // flip the negative values to largest first

  153.             for (i = 0; i < rps->num_negative_pics >> 1; i++) {

  154.                 delta_poc         = rps->delta_poc[i];

  155.                 used              = rps->used[i];

  156.                 rps->delta_poc[i] = rps->delta_poc[k];

  157.                 rps->used[i]      = rps->used[k];

  158.                 rps->delta_poc[k] = delta_poc;

  159.                 rps->used[k]      = used;

  160.                 k--;

  161.             }

  162.         }

  163.     } else {

  164.         unsigned int prev, nb_positive_pics;

  165.         rps->num_negative_pics = get_ue_golomb_long(gb);

  166.         nb_positive_pics       = get_ue_golomb_long(gb);

  167. 

  168.         if (rps->num_negative_pics >= MAX_REFS ||

  169.             nb_positive_pics >= MAX_REFS) {

  170.             av_log(s->avctx, AV_LOG_ERROR, "Too many refs in a short term RPS.\n");

  171.             return AVERROR_INVALIDDATA;

  172.         }

  173. 

  174.         rps->num_delta_pocs = rps->num_negative_pics + nb_positive_pics;

  175.         if (rps->num_delta_pocs) {

  176.             prev = 0;

  177.             for (i = 0; i < rps->num_negative_pics; i++) {

  178.                 delta_poc = get_ue_golomb_long(gb) + 1;

  179.                 prev -= delta_poc;

  180.                 rps->delta_poc[i] = prev;

  181.                 rps->used[i]      = get_bits1(gb);

  182.             }

  183.             prev = 0;

  184.             for (i = 0; i < nb_positive_pics; i++) {

  185.                 delta_poc = get_ue_golomb_long(gb) + 1;

  186.                 prev += delta_poc;

  187.                 rps->delta_poc[rps->num_negative_pics + i] = prev;

  188.                 rps->used[rps->num_negative_pics + i]      = get_bits1(gb);

  189.             }

  190.         }

  191.     }

  192.     return 0;

  193. }

  194. 

  195. static int decode_profile_tier_level(HEVCLocalContext *lc, PTL *ptl,

  196.                                      int max_num_sub_layers)

  197. {

  198.     int i, j;

  199.     GetBitContext *gb = &lc->gb;

  200. 

  201.     ptl->general_profile_space = get_bits(gb, 2);

  202.     ptl->general_tier_flag     = get_bits1(gb);

  203.     ptl->general_profile_idc   = get_bits(gb, 5);

  204.     for (i = 0; i < 32; i++)

  205.         ptl->general_profile_compatibility_flag[i] = get_bits1(gb);

  206.     skip_bits1(gb); // general_progressive_source_flag

  207.     skip_bits1(gb); // general_interlaced_source_flag

  208.     skip_bits1(gb); // general_non_packed_constraint_flag

  209.     skip_bits1(gb); // general_frame_only_constraint_flag

  210.     if (get_bits(gb, 16) != 0) // XXX_reserved_zero_44bits[0..15]

  211.         return -1;

  212.     if (get_bits(gb, 16) != 0) // XXX_reserved_zero_44bits[16..31]

  213.         return -1;

  214.     if (get_bits(gb, 12) != 0) // XXX_reserved_zero_44bits[32..43]

  215.         return -1;

  216. 

  217.     ptl->general_level_idc = get_bits(gb, 8);

  218.     for (i = 0; i < max_num_sub_layers - 1; i++) {

  219.         ptl->sub_layer_profile_present_flag[i] = get_bits1(gb);

  220.         ptl->sub_layer_level_present_flag[i]   = get_bits1(gb);

  221.     }

  222.     if (max_num_sub_layers - 1 > 0)

  223.         for (i = max_num_sub_layers - 1; i < 8; i++)

  224.             skip_bits(gb, 2);  // reserved_zero_2bits[i]

  225.     for (i = 0; i < max_num_sub_layers - 1; i++) {

  226.         if (ptl->sub_layer_profile_present_flag[i]) {

  227.             ptl->sub_layer_profile_space[i] = get_bits(gb, 2);

  228.             ptl->sub_layer_tier_flag[i]     = get_bits(gb, 1);

  229.             ptl->sub_layer_profile_idc[i]   = get_bits(gb, 5);

  230.             for (j = 0; j < 32; j++)

  231.                 ptl->sub_layer_profile_compatibility_flags[i][j] = get_bits1(gb);

  232.             skip_bits1(gb); // sub_layer_progressive_source_flag

  233.             skip_bits1(gb); // sub_layer_interlaced_source_flag

  234.             skip_bits1(gb); // sub_layer_non_packed_constraint_flag

  235.             skip_bits1(gb); // sub_layer_frame_only_constraint_flag

  236. 

  237.             if (get_bits(gb, 16) != 0) // sub_layer_reserved_zero_44bits[0..15]

  238.                 return -1;

  239.             if (get_bits(gb, 16) != 0) // sub_layer_reserved_zero_44bits[16..31]

  240.                 return -1;

  241.             if (get_bits(gb, 12) != 0) // sub_layer_reserved_zero_44bits[32..43]

  242.                 return -1;

  243.         }

  244.         if (ptl->sub_layer_level_present_flag[i])

  245.             ptl->sub_layer_level_idc[i] = get_bits(gb, 8);

  246.     }

  247.     return 0;

  248. }

  249. 

  250. static void decode_sublayer_hrd(HEVCContext *s, 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.         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.     if (decode_profile_tier_level(&s->HEVClc, &vps->ptl, vps->vps_max_sub_layers) < 0) {

  366.         av_log(s->avctx, AV_LOG_ERROR, "Error decoding profile tier level.\n");

  367.         goto err;

  368.     }

  369.     vps->vps_sub_layer_ordering_info_present_flag = get_bits1(gb);

  370. 

  371.     i = vps->vps_sub_layer_ordering_info_present_flag ? 0 : vps->vps_max_sub_layers - 1;

  372.     for (; i < vps->vps_max_sub_layers; i++) {

  373.         vps->vps_max_dec_pic_buffering[i] = get_ue_golomb_long(gb) + 1;

  374.         vps->vps_num_reorder_pics[i]      = get_ue_golomb_long(gb);

  375.         vps->vps_max_latency_increase[i]  = get_ue_golomb_long(gb) - 1;

  376. 

  377.         if (vps->vps_max_dec_pic_buffering[i] > MAX_DPB_SIZE) {

  378.             av_log(s->avctx, AV_LOG_ERROR, "vps_max_dec_pic_buffering_minus1 out of range: %d\n",

  379.                    vps->vps_max_dec_pic_buffering[i] - 1);

  380.             goto err;

  381.         }

  382.         if (vps->vps_num_reorder_pics[i] > vps->vps_max_dec_pic_buffering[i] - 1) {

  383.             av_log(s->avctx, AV_LOG_ERROR, "vps_max_num_reorder_pics out of range: %d\n",

  384.                    vps->vps_num_reorder_pics[i]);

  385.             goto err;

  386.         }

  387.     }

  388. 

  389.     vps->vps_max_layer_id   = get_bits(gb, 6);

  390.     vps->vps_num_layer_sets = get_ue_golomb_long(gb) + 1;

  391.     for (i = 1; i < vps->vps_num_layer_sets; i++)

  392.         for (j = 0; j <= vps->vps_max_layer_id; j++)

  393.             skip_bits(gb, 1);  // layer_id_included_flag[i][j]

  394. 

  395.     vps->vps_timing_info_present_flag = get_bits1(gb);

  396.     if (vps->vps_timing_info_present_flag) {

  397.         vps->vps_num_units_in_tick               = get_bits_long(gb, 32);

  398.         vps->vps_time_scale                      = get_bits_long(gb, 32);

  399.         vps->vps_poc_proportional_to_timing_flag = get_bits1(gb);

  400.         if (vps->vps_poc_proportional_to_timing_flag)

  401.             vps->vps_num_ticks_poc_diff_one = get_ue_golomb_long(gb) + 1;

  402.         vps->vps_num_hrd_parameters = get_ue_golomb_long(gb);

  403.         for (i = 0; i < vps->vps_num_hrd_parameters; i++) {

  404.             int common_inf_present = 1;

  405. 

  406.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  407.             if (i)

  408.                 common_inf_present = get_bits1(gb);

  409.             decode_hrd(s, common_inf_present, vps->vps_max_sub_layers);

  410.         }

  411.     }

  412.     get_bits1(gb); /* vps_extension_flag */

  413. 

  414.     av_buffer_unref(&s->vps_list[vps_id]);

  415.     s->vps_list[vps_id] = vps_buf;

  416.     return 0;

  417. 

  418. err:

  419.     av_buffer_unref(&vps_buf);

  420.     return AVERROR_INVALIDDATA;

  421. }

  422. 

  423. static void decode_vui(HEVCContext *s, HEVCSPS *sps)

  424. {

  425.     VUI *vui          = &sps->vui;

  426.     GetBitContext *gb = &s->HEVClc.gb;

  427.     int sar_present;

  428. 

  429.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding VUI\n");

  430. 

  431.     sar_present = get_bits1(gb);

  432.     if (sar_present) {

  433.         uint8_t sar_idx = get_bits(gb, 8);

  434.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

  435.             vui->sar = vui_sar[sar_idx];

  436.         else if (sar_idx == 255) {

  437.             vui->sar.num = get_bits(gb, 16);

  438.             vui->sar.den = get_bits(gb, 16);

  439.         } else

  440.             av_log(s->avctx, AV_LOG_WARNING,

  441.                    "Unknown SAR index: %u.\n", sar_idx);

  442.     }

  443. 

  444.     vui->overscan_info_present_flag = get_bits1(gb);

  445.     if (vui->overscan_info_present_flag)

  446.         vui->overscan_appropriate_flag = get_bits1(gb);

  447. 

  448.     vui->video_signal_type_present_flag = get_bits1(gb);

  449.     if (vui->video_signal_type_present_flag) {

  450.         vui->video_format                    = get_bits(gb, 3);

  451.         vui->video_full_range_flag           = get_bits1(gb);

  452.         vui->colour_description_present_flag = get_bits1(gb);

  453.         if (vui->video_full_range_flag && sps->pix_fmt == AV_PIX_FMT_YUV420P)

  454.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  455.         if (vui->colour_description_present_flag) {

  456.             vui->colour_primaries        = get_bits(gb, 8);

  457.             vui->transfer_characteristic = get_bits(gb, 8);

  458.             vui->matrix_coeffs           = get_bits(gb, 8);

  459. 

  460.             // Set invalid values to "unspecified"

  461.             if (vui->colour_primaries >= AVCOL_PRI_NB)

  462.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

  463.             if (vui->transfer_characteristic >= AVCOL_TRC_NB)

  464.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

  465.             if (vui->matrix_coeffs >= AVCOL_SPC_NB)

  466.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

  467.         }

  468.     }

  469. 

  470.     vui->chroma_loc_info_present_flag = get_bits1(gb);

  471.     if (vui->chroma_loc_info_present_flag) {

  472.         vui->chroma_sample_loc_type_top_field    = get_ue_golomb_long(gb);

  473.         vui->chroma_sample_loc_type_bottom_field = get_ue_golomb_long(gb);

  474.     }

  475. 

  476.     vui->neutra_chroma_indication_flag = get_bits1(gb);

  477.     vui->field_seq_flag                = get_bits1(gb);

  478.     vui->frame_field_info_present_flag = get_bits1(gb);

  479. 

  480.     vui->default_display_window_flag = get_bits1(gb);

  481.     if (vui->default_display_window_flag) {

  482.         //TODO: * 2 is only valid for 420

  483.         vui->def_disp_win.left_offset   = get_ue_golomb_long(gb) * 2;

  484.         vui->def_disp_win.right_offset  = get_ue_golomb_long(gb) * 2;

  485.         vui->def_disp_win.top_offset    = get_ue_golomb_long(gb) * 2;

  486.         vui->def_disp_win.bottom_offset = get_ue_golomb_long(gb) * 2;

  487. 

  488.         if (s->apply_defdispwin &&

  489.             s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {

  490.             av_log(s->avctx, AV_LOG_DEBUG,

  491.                    "discarding vui default display window, "

  492.                    "original values are l:%u r:%u t:%u b:%u\n",

  493.                    vui->def_disp_win.left_offset,

  494.                    vui->def_disp_win.right_offset,

  495.                    vui->def_disp_win.top_offset,

  496.                    vui->def_disp_win.bottom_offset);

  497. 

  498.             vui->def_disp_win.left_offset   =

  499.             vui->def_disp_win.right_offset  =

  500.             vui->def_disp_win.top_offset    =

  501.             vui->def_disp_win.bottom_offset = 0;

  502.         }

  503.     }

  504. 

  505.     vui->vui_timing_info_present_flag = get_bits1(gb);

  506.     if (vui->vui_timing_info_present_flag) {

  507.         vui->vui_num_units_in_tick               = get_bits(gb, 32);

  508.         vui->vui_time_scale                      = get_bits(gb, 32);

  509.         vui->vui_poc_proportional_to_timing_flag = get_bits1(gb);

  510.         if (vui->vui_poc_proportional_to_timing_flag)

  511.             vui->vui_num_ticks_poc_diff_one_minus1 = get_ue_golomb_long(gb);

  512.         vui->vui_hrd_parameters_present_flag = get_bits1(gb);

  513.         if (vui->vui_hrd_parameters_present_flag)

  514.             decode_hrd(s, 1, sps->max_sub_layers);

  515.     }

  516. 

  517.     vui->bitstream_restriction_flag = get_bits1(gb);

  518.     if (vui->bitstream_restriction_flag) {

  519.         vui->tiles_fixed_structure_flag              = get_bits1(gb);

  520.         vui->motion_vectors_over_pic_boundaries_flag = get_bits1(gb);

  521.         vui->restricted_ref_pic_lists_flag           = get_bits1(gb);

  522.         vui->min_spatial_segmentation_idc            = get_ue_golomb_long(gb);

  523.         vui->max_bytes_per_pic_denom                 = get_ue_golomb_long(gb);

  524.         vui->max_bits_per_min_cu_denom               = get_ue_golomb_long(gb);

  525.         vui->log2_max_mv_length_horizontal           = get_ue_golomb_long(gb);

  526.         vui->log2_max_mv_length_vertical             = get_ue_golomb_long(gb);

  527.     }

  528. }

  529. 

  530. static void set_default_scaling_list_data(ScalingList *sl)

  531. {

  532.     int matrixId;

  533. 

  534.     for (matrixId = 0; matrixId < 6; matrixId++) {

  535.         // 4x4 default is 16

  536.         memset(sl->sl[0][matrixId], 16, 16);

  537.         sl->sl_dc[0][matrixId] = 16; // default for 16x16

  538.         sl->sl_dc[1][matrixId] = 16; // default for 32x32

  539.     }

  540.     memcpy(sl->sl[1][0], default_scaling_list_intra, 64);

  541.     memcpy(sl->sl[1][1], default_scaling_list_intra, 64);

  542.     memcpy(sl->sl[1][2], default_scaling_list_intra, 64);

  543.     memcpy(sl->sl[1][3], default_scaling_list_inter, 64);

  544.     memcpy(sl->sl[1][4], default_scaling_list_inter, 64);

  545.     memcpy(sl->sl[1][5], default_scaling_list_inter, 64);

  546.     memcpy(sl->sl[2][0], default_scaling_list_intra, 64);

  547.     memcpy(sl->sl[2][1], default_scaling_list_intra, 64);

  548.     memcpy(sl->sl[2][2], default_scaling_list_intra, 64);

  549.     memcpy(sl->sl[2][3], default_scaling_list_inter, 64);

  550.     memcpy(sl->sl[2][4], default_scaling_list_inter, 64);

  551.     memcpy(sl->sl[2][5], default_scaling_list_inter, 64);

  552.     memcpy(sl->sl[3][0], default_scaling_list_intra, 64);

  553.     memcpy(sl->sl[3][1], default_scaling_list_inter, 64);

  554. }

  555. 

  556. static int scaling_list_data(HEVCContext *s, ScalingList *sl)

  557. {

  558.     GetBitContext *gb = &s->HEVClc.gb;

  559.     uint8_t scaling_list_pred_mode_flag[4][6];

  560.     int32_t scaling_list_dc_coef[2][6];

  561.     int size_id, matrix_id, i, pos, delta;

  562. 

  563.     for (size_id = 0; size_id < 4; size_id++)

  564.         for (matrix_id = 0; matrix_id < (size_id == 3 ? 2 : 6); matrix_id++) {

  565.             scaling_list_pred_mode_flag[size_id][matrix_id] = get_bits1(gb);

  566.             if (!scaling_list_pred_mode_flag[size_id][matrix_id]) {

  567.                 delta = get_ue_golomb_long(gb);

  568.                 /* Only need to handle non-zero delta. Zero means default,

  569.                  * which should already be in the arrays. */

  570.                 if (delta) {

  571.                     // Copy from previous array.

  572.                     if (matrix_id - delta < 0) {

  573.                         av_log(s->avctx, AV_LOG_ERROR,

  574.                                "Invalid delta in scaling list data: %d.\n", delta);

  575.                         return AVERROR_INVALIDDATA;

  576.                     }

  577. 

  578.                     memcpy(sl->sl[size_id][matrix_id],

  579.                            sl->sl[size_id][matrix_id - delta],

  580.                            size_id > 0 ? 64 : 16);

  581.                     if (size_id > 1)

  582.                         sl->sl_dc[size_id - 2][matrix_id] = sl->sl_dc[size_id - 2][matrix_id - delta];

  583.                 }

  584.             } else {

  585.                 int next_coef, coef_num;

  586.                 int32_t scaling_list_delta_coef;

  587. 

  588.                 next_coef = 8;

  589.                 coef_num  = FFMIN(64, 1 << (4 + (size_id << 1)));

  590.                 if (size_id > 1) {

  591.                     scaling_list_dc_coef[size_id - 2][matrix_id] = get_se_golomb(gb) + 8;

  592.                     next_coef = scaling_list_dc_coef[size_id - 2][matrix_id];

  593.                     sl->sl_dc[size_id - 2][matrix_id] = next_coef;

  594.                 }

  595.                 for (i = 0; i < coef_num; i++) {

  596.                     if (size_id == 0)

  597.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  598.                                   ff_hevc_diag_scan4x4_x[i];

  599.                     else

  600.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  601.                                   ff_hevc_diag_scan8x8_x[i];

  602. 

  603.                     scaling_list_delta_coef = get_se_golomb(gb);

  604.                     next_coef = (next_coef + scaling_list_delta_coef + 256) % 256;

  605.                     sl->sl[size_id][matrix_id][pos] = next_coef;

  606.                 }

  607.             }

  608.         }

  609. 

  610.     return 0;

  611. }

  612. 

  613. int ff_hevc_decode_nal_sps(HEVCContext *s)

  614. {

  615.     const AVPixFmtDescriptor *desc;

  616.     GetBitContext *gb = &s->HEVClc.gb;

  617.     int ret    = 0;

  618.     int sps_id = 0;

  619.     int log2_diff_max_min_transform_block_size;

  620.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  621.     int i;

  622. 

  623.     HEVCSPS *sps;

  624.     AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));

  625. 

  626.     if (!sps_buf)

  627.         return AVERROR(ENOMEM);

  628.     sps = (HEVCSPS*)sps_buf->data;

  629. 

  630.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding SPS\n");

  631. 

  632.     // Coded parameters

  633. 

  634.     sps->vps_id = get_bits(gb, 4);

  635.     if (sps->vps_id >= MAX_VPS_COUNT) {

  636.         av_log(s->avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", sps->vps_id);

  637.         ret = AVERROR_INVALIDDATA;

  638.         goto err;

  639.     }

  640. 

  641.     sps->max_sub_layers = get_bits(gb, 3) + 1;

  642.     if (sps->max_sub_layers > MAX_SUB_LAYERS) {

  643.         av_log(s->avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n",

  644.                sps->max_sub_layers);

  645.         ret = AVERROR_INVALIDDATA;

  646.         goto err;

  647.     }

  648. 

  649.     skip_bits1(gb); // temporal_id_nesting_flag

  650.     if (decode_profile_tier_level(&s->HEVClc, &sps->ptl,

  651.                                   sps->max_sub_layers) < 0) {

  652.         av_log(s->avctx, AV_LOG_ERROR, "error decoding profile tier level\n");

  653.         ret = AVERROR_INVALIDDATA;

  654.         goto err;

  655.     }

  656.     sps_id = get_ue_golomb_long(gb);

  657.     if (sps_id >= MAX_SPS_COUNT) {

  658.         av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", sps_id);

  659.         ret = AVERROR_INVALIDDATA;

  660.         goto err;

  661.     }

  662. 

  663.     sps->chroma_format_idc = get_ue_golomb_long(gb);

  664.     if (sps->chroma_format_idc != 1) {

  665.         avpriv_report_missing_feature(s->avctx, "chroma_format_idc != 1\n");

  666.         ret = AVERROR_PATCHWELCOME;

  667.         goto err;

  668.     }

  669. 

  670.     if (sps->chroma_format_idc == 3)

  671.         sps->separate_colour_plane_flag = get_bits1(gb);

  672. 

  673.     sps->width  = get_ue_golomb_long(gb);

  674.     sps->height = get_ue_golomb_long(gb);

  675.     if ((ret = av_image_check_size(sps->width,

  676.                                    sps->height, 0, s->avctx)) < 0)

  677.         goto err;

  678. 

  679.     if (get_bits1(gb)) { // pic_conformance_flag

  680.         //TODO: * 2 is only valid for 420

  681.         sps->pic_conf_win.left_offset   = get_ue_golomb_long(gb) * 2;

  682.         sps->pic_conf_win.right_offset  = get_ue_golomb_long(gb) * 2;

  683.         sps->pic_conf_win.top_offset    = get_ue_golomb_long(gb) * 2;

  684.         sps->pic_conf_win.bottom_offset = get_ue_golomb_long(gb) * 2;

  685. 

  686.         if (s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {

  687.             av_log(s->avctx, AV_LOG_DEBUG,

  688.                    "discarding sps conformance window, "

  689.                    "original values are l:%u r:%u t:%u b:%u\n",

  690.                    sps->pic_conf_win.left_offset,

  691.                    sps->pic_conf_win.right_offset,

  692.                    sps->pic_conf_win.top_offset,

  693.                    sps->pic_conf_win.bottom_offset);

  694. 

  695.             sps->pic_conf_win.left_offset   =

  696.             sps->pic_conf_win.right_offset  =

  697.             sps->pic_conf_win.top_offset    =

  698.             sps->pic_conf_win.bottom_offset = 0;

  699.         }

  700.         sps->output_window = sps->pic_conf_win;

  701.     }

  702. 

  703.     sps->bit_depth   = get_ue_golomb_long(gb) + 8;

  704.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

  705.     if (bit_depth_chroma != sps->bit_depth) {

  706.         av_log(s->avctx, AV_LOG_ERROR,

  707.                "Luma bit depth (%d) is different from chroma bit depth (%d), "

  708.                "this is unsupported.\n",

  709.                sps->bit_depth, bit_depth_chroma);

  710.         ret = AVERROR_INVALIDDATA;

  711.         goto err;

  712.     }

  713. 

  714.     if (sps->chroma_format_idc == 1) {

  715.         switch (sps->bit_depth) {

  716.         case 8:  sps->pix_fmt = AV_PIX_FMT_YUV420P;   break;

  717.         case 9:  sps->pix_fmt = AV_PIX_FMT_YUV420P9;  break;

  718.         case 10: sps->pix_fmt = AV_PIX_FMT_YUV420P10; break;

  719.         default:

  720.             av_log(s->avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n",

  721.                    sps->bit_depth);

  722.             ret = AVERROR_PATCHWELCOME;

  723.             goto err;

  724.         }

  725.     } else {

  726.         av_log(s->avctx, AV_LOG_ERROR,

  727.                "non-4:2:0 support is currently unspecified.\n");

  728.         return AVERROR_PATCHWELCOME;

  729.     }

  730. 

  731.     desc = av_pix_fmt_desc_get(sps->pix_fmt);

  732.     if (!desc) {

  733.         ret = AVERROR(EINVAL);

  734.         goto err;

  735.     }

  736. 

  737.     sps->hshift[0] = sps->vshift[0] = 0;

  738.     sps->hshift[2] = sps->hshift[1] = desc->log2_chroma_w;

  739.     sps->vshift[2] = sps->vshift[1] = desc->log2_chroma_h;

  740. 

  741.     sps->pixel_shift = sps->bit_depth > 8;

  742. 

  743.     sps->log2_max_poc_lsb = get_ue_golomb_long(gb) + 4;

  744.     if (sps->log2_max_poc_lsb > 16) {

  745.         av_log(s->avctx, AV_LOG_ERROR, "log2_max_pic_order_cnt_lsb_minus4 out range: %d\n",

  746.                sps->log2_max_poc_lsb - 4);

  747.         ret = AVERROR_INVALIDDATA;

  748.         goto err;

  749.     }

  750. 

  751.     sublayer_ordering_info = get_bits1(gb);

  752.     start = sublayer_ordering_info ? 0 : sps->max_sub_layers - 1;

  753.     for (i = start; i < sps->max_sub_layers; i++) {

  754.         sps->temporal_layer[i].max_dec_pic_buffering = get_ue_golomb_long(gb) + 1;

  755.         sps->temporal_layer[i].num_reorder_pics      = get_ue_golomb_long(gb);

  756.         sps->temporal_layer[i].max_latency_increase  = get_ue_golomb_long(gb) - 1;

  757.         if (sps->temporal_layer[i].max_dec_pic_buffering > MAX_DPB_SIZE) {

  758.             av_log(s->avctx, AV_LOG_ERROR, "sps_max_dec_pic_buffering_minus1 out of range: %d\n",

  759.                    sps->temporal_layer[i].max_dec_pic_buffering - 1);

  760.             ret = AVERROR_INVALIDDATA;

  761.             goto err;

  762.         }

  763.         if (sps->temporal_layer[i].num_reorder_pics > sps->temporal_layer[i].max_dec_pic_buffering - 1) {

  764.             av_log(s->avctx, AV_LOG_ERROR, "sps_max_num_reorder_pics out of range: %d\n",

  765.                    sps->temporal_layer[i].num_reorder_pics);

  766.             ret = AVERROR_INVALIDDATA;

  767.             goto err;

  768.         }

  769.     }

  770. 

  771.     if (!sublayer_ordering_info) {

  772.         for (i = 0; i < start; i++) {

  773.             sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[start].max_dec_pic_buffering;

  774.             sps->temporal_layer[i].num_reorder_pics      = sps->temporal_layer[start].num_reorder_pics;

  775.             sps->temporal_layer[i].max_latency_increase  = sps->temporal_layer[start].max_latency_increase;

  776.         }

  777.     }

  778. 

  779.     sps->log2_min_cb_size                    = get_ue_golomb_long(gb) + 3;

  780.     sps->log2_diff_max_min_coding_block_size = get_ue_golomb_long(gb);

  781.     sps->log2_min_tb_size                    = get_ue_golomb_long(gb) + 2;

  782.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  783.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  784.                                                sps->log2_min_tb_size;

  785. 

  786.     if (sps->log2_min_tb_size >= sps->log2_min_cb_size) {

  787.         av_log(s->avctx, AV_LOG_ERROR, "Invalid value for log2_min_tb_size");

  788.         ret = AVERROR_INVALIDDATA;

  789.         goto err;

  790.     }

  791.     sps->max_transform_hierarchy_depth_inter = get_ue_golomb_long(gb);

  792.     sps->max_transform_hierarchy_depth_intra = get_ue_golomb_long(gb);

  793. 

  794.     sps->scaling_list_enable_flag = get_bits1(gb);

  795.     if (sps->scaling_list_enable_flag) {

  796.         set_default_scaling_list_data(&sps->scaling_list);

  797. 

  798.         if (get_bits1(gb)) {

  799.             ret = scaling_list_data(s, &sps->scaling_list);

  800.             if (ret < 0)

  801.                 goto err;

  802.         }

  803.     }

  804. 

  805.     sps->amp_enabled_flag = get_bits1(gb);

  806.     sps->sao_enabled      = get_bits1(gb);

  807. 

  808.     sps->pcm_enabled_flag = get_bits1(gb);

  809.     if (sps->pcm_enabled_flag) {

  810.         int pcm_bit_depth_chroma;

  811.         sps->pcm.bit_depth   = get_bits(gb, 4) + 1;

  812.         pcm_bit_depth_chroma = get_bits(gb, 4) + 1;

  813.         if (pcm_bit_depth_chroma != sps->pcm.bit_depth) {

  814.             av_log(s->avctx, AV_LOG_ERROR,

  815.                    "PCM Luma bit depth (%d) is different from PCM chroma"

  816.                    "bit depth (%d), this is unsupported.\n",

  817.                    sps->pcm.bit_depth, pcm_bit_depth_chroma);

  818.             ret = AVERROR_INVALIDDATA;

  819.             goto err;

  820.         }

  821. 

  822.         sps->pcm.log2_min_pcm_cb_size = get_ue_golomb_long(gb) + 3;

  823.         sps->pcm.log2_max_pcm_cb_size = sps->pcm.log2_min_pcm_cb_size +

  824.                                         get_ue_golomb_long(gb);

  825.         if (sps->pcm.bit_depth > sps->bit_depth) {

  826.             av_log(s->avctx, AV_LOG_ERROR,

  827.                    "PCM bit depth (%d) is greater than normal bit depth (%d)\n",

  828.                    sps->pcm.bit_depth, sps->bit_depth);

  829.             ret = AVERROR_INVALIDDATA;

  830.             goto err;

  831.         }

  832. 

  833.         sps->pcm.loop_filter_disable_flag = get_bits1(gb);

  834.     }

  835. 

  836.     sps->nb_st_rps = get_ue_golomb_long(gb);

  837.     if (sps->nb_st_rps > MAX_SHORT_TERM_RPS_COUNT) {

  838.         av_log(s->avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",

  839.                sps->nb_st_rps);

  840.         ret = AVERROR_INVALIDDATA;

  841.         goto err;

  842.     }

  843.     for (i = 0; i < sps->nb_st_rps; i++) {

  844.         if ((ret = ff_hevc_decode_short_term_rps(s, &sps->st_rps[i],

  845.                                                  sps, 0)) < 0)

  846.             goto err;

  847.     }

  848. 

  849.     sps->long_term_ref_pics_present_flag = get_bits1(gb);

  850.     if (sps->long_term_ref_pics_present_flag) {

  851.         sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);

  852.         for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {

  853.             sps->lt_ref_pic_poc_lsb_sps[i]       = get_bits(gb, sps->log2_max_poc_lsb);

  854.             sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);

  855.         }

  856.     }

  857. 

  858.     sps->sps_temporal_mvp_enabled_flag          = get_bits1(gb);

  859.     sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);

  860.     sps->vui.sar = (AVRational){0, 1};

  861.     vui_present = get_bits1(gb);

  862.     if (vui_present)

  863.         decode_vui(s, sps);

  864.     skip_bits1(gb); // sps_extension_flag

  865. 

  866.     if (s->apply_defdispwin) {

  867.         sps->output_window.left_offset   += sps->vui.def_disp_win.left_offset;

  868.         sps->output_window.right_offset  += sps->vui.def_disp_win.right_offset;

  869.         sps->output_window.top_offset    += sps->vui.def_disp_win.top_offset;

  870.         sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

  871.     }

  872.     if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) &&

  873.         !(s->avctx->flags & CODEC_FLAG_UNALIGNED)) {

  874.         sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));

  875.         av_log(s->avctx, AV_LOG_WARNING, "Reducing left output window to %d "

  876.                "chroma samples to preserve alignment.\n",

  877.                sps->output_window.left_offset);

  878.     }

  879.     sps->output_width  = sps->width -

  880.                          (sps->output_window.left_offset + sps->output_window.right_offset);

  881.     sps->output_height = sps->height -

  882.                          (sps->output_window.top_offset + sps->output_window.bottom_offset);

  883.     if (sps->output_width <= 0 || sps->output_height <= 0) {

  884.         av_log(s->avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",

  885.                sps->output_width, sps->output_height);

  886.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  887.             ret = AVERROR_INVALIDDATA;

  888.             goto err;

  889.         }

  890.         av_log(s->avctx, AV_LOG_WARNING,

  891.                "Displaying the whole video surface.\n");

  892.         sps->pic_conf_win.left_offset   =

  893.         sps->pic_conf_win.right_offset  =

  894.         sps->pic_conf_win.top_offset    =

  895.         sps->pic_conf_win.bottom_offset = 0;

  896.         sps->output_width               = sps->width;

  897.         sps->output_height              = sps->height;

  898.     }

  899. 

  900.     // Inferred parameters

  901.     sps->log2_ctb_size = sps->log2_min_cb_size +

  902.                          sps->log2_diff_max_min_coding_block_size;

  903.     sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

  904. 

  905.     sps->ctb_width  = (sps->width  + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  906.     sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  907.     sps->ctb_size   = sps->ctb_width * sps->ctb_height;

  908. 

  909.     sps->min_cb_width  = sps->width  >> sps->log2_min_cb_size;

  910.     sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

  911.     sps->min_tb_width  = sps->width  >> sps->log2_min_tb_size;

  912.     sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

  913.     sps->min_pu_width  = sps->width  >> sps->log2_min_pu_size;

  914.     sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

  915. 

  916.     sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

  917. 

  918.     if (sps->width  & ((1 << sps->log2_min_cb_size) - 1) ||

  919.         sps->height & ((1 << sps->log2_min_cb_size) - 1)) {

  920.         av_log(s->avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  921.         goto err;

  922.     }

  923. 

  924.     if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {

  925.         av_log(s->avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);

  926.         goto err;

  927.     }

  928.     if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {

  929.         av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

  930.                sps->max_transform_hierarchy_depth_inter);

  931.         goto err;

  932.     }

  933.     if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

  934.         av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  935.                sps->max_transform_hierarchy_depth_intra);

  936.         goto err;

  937.     }

  938.     if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

  939.         av_log(s->avctx, AV_LOG_ERROR,

  940.                "max transform block size out of range: %d\n",

  941.                sps->log2_max_trafo_size);

  942.         goto err;

  943.     }

  944. 

  945.     if (s->avctx->debug & FF_DEBUG_BITSTREAM) {

  946.         av_log(s->avctx, AV_LOG_DEBUG,

  947.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  948.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  949.                sps_id, sps->width, sps->height,

  950.                sps->output_width, sps->output_height,

  951.                av_get_pix_fmt_name(sps->pix_fmt));

  952.     }

  953. 

  954.     /* check if this is a repeat of an already parsed SPS, then keep the

  955.      * original one.

  956.      * otherwise drop all PPSes that depend on it */

  957.     if (s->sps_list[sps_id] &&

  958.         !memcmp(s->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  959.         av_buffer_unref(&sps_buf);

  960.     } else {

  961.         for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++) {

  962.             if (s->pps_list[i] && ((HEVCPPS*)s->pps_list[i]->data)->sps_id == sps_id)

  963.                 av_buffer_unref(&s->pps_list[i]);

  964.         }

  965.         av_buffer_unref(&s->sps_list[sps_id]);

  966.         s->sps_list[sps_id] = sps_buf;

  967.     }

  968. 

  969.     return 0;

  970. 

  971. err:

  972.     av_buffer_unref(&sps_buf);

  973.     return ret;

  974. }

  975. 

  976. static void hevc_pps_free(void *opaque, uint8_t *data)

  977. {

  978.     HEVCPPS *pps = (HEVCPPS*)data;

  979. 

  980.     av_freep(&pps->column_width);

  981.     av_freep(&pps->row_height);

  982.     av_freep(&pps->col_bd);

  983.     av_freep(&pps->row_bd);

  984.     av_freep(&pps->col_idxX);

  985.     av_freep(&pps->ctb_addr_rs_to_ts);

  986.     av_freep(&pps->ctb_addr_ts_to_rs);

  987.     av_freep(&pps->tile_pos_rs);

  988.     av_freep(&pps->tile_id);

  989.     av_freep(&pps->min_cb_addr_zs);

  990.     av_freep(&pps->min_tb_addr_zs);

  991. 

  992.     av_freep(&pps);

  993. }

  994. 

  995. int ff_hevc_decode_nal_pps(HEVCContext *s)

  996. {

  997.     GetBitContext *gb = &s->HEVClc.gb;

  998.     HEVCSPS      *sps = NULL;

  999.     int pic_area_in_ctbs, pic_area_in_min_cbs, pic_area_in_min_tbs;

  1000.     int log2_diff_ctb_min_tb_size;

  1001.     int i, j, x, y, ctb_addr_rs, tile_id;

  1002.     int ret    = 0;

  1003.     int pps_id = 0;

  1004. 

  1005.     AVBufferRef *pps_buf;

  1006.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1007. 

  1008.     if (!pps)

  1009.         return AVERROR(ENOMEM);

  1010. 

  1011.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1012.                                hevc_pps_free, NULL, 0);

  1013.     if (!pps_buf) {

  1014.         av_freep(&pps);

  1015.         return AVERROR(ENOMEM);

  1016.     }

  1017. 

  1018.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1019. 

  1020.     // Default values

  1021.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1022.     pps->num_tile_columns                      = 1;

  1023.     pps->num_tile_rows                         = 1;

  1024.     pps->uniform_spacing_flag                  = 1;

  1025.     pps->disable_dbf                           = 0;

  1026.     pps->beta_offset                           = 0;

  1027.     pps->tc_offset                             = 0;

  1028. 

  1029.     // Coded parameters

  1030.     pps_id = get_ue_golomb_long(gb);

  1031.     if (pps_id >= MAX_PPS_COUNT) {

  1032.         av_log(s->avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1033.         ret = AVERROR_INVALIDDATA;

  1034.         goto err;

  1035.     }

  1036.     pps->sps_id = get_ue_golomb_long(gb);

  1037.     if (pps->sps_id >= MAX_SPS_COUNT) {

  1038.         av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1039.         ret = AVERROR_INVALIDDATA;

  1040.         goto err;

  1041.     }

  1042.     if (!s->sps_list[pps->sps_id]) {

  1043.         av_log(s->avctx, AV_LOG_ERROR, "SPS does not exist \n");

  1044.         ret = AVERROR_INVALIDDATA;

  1045.         goto err;

  1046.     }

  1047.     sps = (HEVCSPS *)s->sps_list[pps->sps_id]->data;

  1048. 

  1049.     pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

  1050.     pps->output_flag_present_flag              = get_bits1(gb);

  1051.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1052. 

  1053.     pps->sign_data_hiding_flag = get_bits1(gb);

  1054. 

  1055.     pps->cabac_init_present_flag = get_bits1(gb);

  1056. 

  1057.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1058.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1059. 

  1060.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1061. 

  1062.     pps->constrained_intra_pred_flag = get_bits1(gb);

  1063.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1064. 

  1065.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1066.     pps->diff_cu_qp_delta_depth   = 0;

  1067.     if (pps->cu_qp_delta_enabled_flag)

  1068.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1069. 

  1070.     pps->cb_qp_offset = get_se_golomb(gb);

  1071.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1072.         av_log(s->avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1073.                pps->cb_qp_offset);

  1074.         ret = AVERROR_INVALIDDATA;

  1075.         goto err;

  1076.     }

  1077.     pps->cr_qp_offset = get_se_golomb(gb);

  1078.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1079.         av_log(s->avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1080.                pps->cr_qp_offset);

  1081.         ret = AVERROR_INVALIDDATA;

  1082.         goto err;

  1083.     }

  1084.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1085. 

  1086.     pps->weighted_pred_flag   = get_bits1(gb);

  1087.     pps->weighted_bipred_flag = get_bits1(gb);

  1088. 

  1089.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1090.     pps->tiles_enabled_flag               = get_bits1(gb);

  1091.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1092. 

  1093.     if (pps->tiles_enabled_flag) {

  1094.         pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

  1095.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

  1096.         if (pps->num_tile_columns == 0 ||

  1097.             pps->num_tile_columns >= sps->width) {

  1098.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1099.                    pps->num_tile_columns - 1);

  1100.             ret = AVERROR_INVALIDDATA;

  1101.             goto err;

  1102.         }

  1103.         if (pps->num_tile_rows == 0 ||

  1104.             pps->num_tile_rows >= sps->height) {

  1105.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1106.                    pps->num_tile_rows - 1);

  1107.             ret = AVERROR_INVALIDDATA;

  1108.             goto err;

  1109.         }

  1110. 

  1111.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1112.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1113.         if (!pps->column_width || !pps->row_height) {

  1114.             ret = AVERROR(ENOMEM);

  1115.             goto err;

  1116.         }

  1117. 

  1118.         pps->uniform_spacing_flag = get_bits1(gb);

  1119.         if (!pps->uniform_spacing_flag) {

  1120.             int sum = 0;

  1121.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1122.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1123.                 sum                 += pps->column_width[i];

  1124.             }

  1125.             if (sum >= sps->ctb_width) {

  1126.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1127.                 ret = AVERROR_INVALIDDATA;

  1128.                 goto err;

  1129.             }

  1130.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1131. 

  1132.             sum = 0;

  1133.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1134.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1135.                 sum               += pps->row_height[i];

  1136.             }

  1137.             if (sum >= sps->ctb_height) {

  1138.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1139.                 ret = AVERROR_INVALIDDATA;

  1140.                 goto err;

  1141.             }

  1142.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1143.         }

  1144.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1145.     }

  1146. 

  1147.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1148. 

  1149.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1150.     if (pps->deblocking_filter_control_present_flag) {

  1151.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1152.         pps->disable_dbf                             = get_bits1(gb);

  1153.         if (!pps->disable_dbf) {

  1154.             pps->beta_offset = get_se_golomb(gb) * 2;

  1155.             pps->tc_offset = get_se_golomb(gb) * 2;

  1156.             if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

  1157.                 av_log(s->avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1158.                        pps->beta_offset/2);

  1159.                 ret = AVERROR_INVALIDDATA;

  1160.                 goto err;

  1161.             }

  1162.             if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

  1163.                 av_log(s->avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1164.                        pps->tc_offset/2);

  1165.                 ret = AVERROR_INVALIDDATA;

  1166.                 goto err;

  1167.             }

  1168.         }

  1169.     }

  1170. 

  1171.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1172.     if (pps->scaling_list_data_present_flag) {

  1173.         set_default_scaling_list_data(&pps->scaling_list);

  1174.         ret = scaling_list_data(s, &pps->scaling_list);

  1175.         if (ret < 0)

  1176.             goto err;

  1177.     }

  1178.     pps->lists_modification_present_flag = get_bits1(gb);

  1179.     pps->log2_parallel_merge_level       = get_ue_golomb_long(gb) + 2;

  1180.     if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {

  1181.         av_log(s->avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1182.                pps->log2_parallel_merge_level - 2);

  1183.         ret = AVERROR_INVALIDDATA;

  1184.         goto err;

  1185.     }

  1186. 

  1187.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1188.     skip_bits1(gb);     // pps_extension_flag

  1189. 

  1190.     // Inferred parameters

  1191.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1192.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1193.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1194.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX) {

  1195.         ret = AVERROR(ENOMEM);

  1196.         goto err;

  1197.     }

  1198. 

  1199.     if (pps->uniform_spacing_flag) {

  1200.         if (!pps->column_width) {

  1201.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1202.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1203.         }

  1204.         if (!pps->column_width || !pps->row_height) {

  1205.             ret = AVERROR(ENOMEM);

  1206.             goto err;

  1207.         }

  1208. 

  1209.         for (i = 0; i < pps->num_tile_columns; i++) {

  1210.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1211.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1212.         }

  1213. 

  1214.         for (i = 0; i < pps->num_tile_rows; i++) {

  1215.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1216.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1217.         }

  1218.     }

  1219. 

  1220.     pps->col_bd[0] = 0;

  1221.     for (i = 0; i < pps->num_tile_columns; i++)

  1222.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1223. 

  1224.     pps->row_bd[0] = 0;

  1225.     for (i = 0; i < pps->num_tile_rows; i++)

  1226.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1227. 

  1228.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1229.         if (i > pps->col_bd[j])

  1230.             j++;

  1231.         pps->col_idxX[i] = j;

  1232.     }

  1233. 

  1234.     /**

  1235.      * 6.5

  1236.      */

  1237.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1238.     pic_area_in_min_cbs  = sps->min_cb_width * sps->min_cb_height;

  1239.     pic_area_in_min_tbs  = sps->min_tb_width * sps->min_tb_height;

  1240. 

  1241.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1242.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1243.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1244.     pps->min_cb_addr_zs    = av_malloc_array(pic_area_in_min_cbs, sizeof(*pps->min_cb_addr_zs));

  1245.     pps->min_tb_addr_zs    = av_malloc_array(pic_area_in_min_tbs, sizeof(*pps->min_tb_addr_zs));

  1246.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1247.         !pps->tile_id || !pps->min_cb_addr_zs || !pps->min_tb_addr_zs) {

  1248.         ret = AVERROR(ENOMEM);

  1249.         goto err;

  1250.     }

  1251. 

  1252.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1253.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1254.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1255.         int tile_x = 0;

  1256.         int tile_y = 0;

  1257.         int val    = 0;

  1258. 

  1259.         for (i = 0; i < pps->num_tile_columns; i++) {

  1260.             if (tb_x < pps->col_bd[i + 1]) {

  1261.                 tile_x = i;

  1262.                 break;

  1263.             }

  1264.         }

  1265. 

  1266.         for (i = 0; i < pps->num_tile_rows; i++) {

  1267.             if (tb_y < pps->row_bd[i + 1]) {

  1268.                 tile_y = i;

  1269.                 break;

  1270.             }

  1271.         }

  1272. 

  1273.         for (i = 0; i < tile_x; i++)

  1274.             val += pps->row_height[tile_y] * pps->column_width[i];

  1275.         for (i = 0; i < tile_y; i++)

  1276.             val += sps->ctb_width * pps->row_height[i];

  1277. 

  1278.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1279.                tb_x - pps->col_bd[tile_x];

  1280. 

  1281.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1282.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1283.     }

  1284. 

  1285.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1286.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1287.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1288.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1289.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1290. 

  1291.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1292.     if (!pps->tile_pos_rs) {

  1293.         ret = AVERROR(ENOMEM);

  1294.         goto err;

  1295.     }

  1296. 

  1297.     for (j = 0; j < pps->num_tile_rows; j++)

  1298.         for (i = 0; i < pps->num_tile_columns; i++)

  1299.             pps->tile_pos_rs[j * pps->num_tile_columns + i] = pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1300. 

  1301.     for (y = 0; y < sps->min_cb_height; y++) {

  1302.         for (x = 0; x < sps->min_cb_width; x++) {

  1303.             int tb_x        = x >> sps->log2_diff_max_min_coding_block_size;

  1304.             int tb_y        = y >> sps->log2_diff_max_min_coding_block_size;

  1305.             int ctb_addr_rs = sps->ctb_width * tb_y + tb_x;

  1306.             int val         = pps->ctb_addr_rs_to_ts[ctb_addr_rs] <<

  1307.                               (sps->log2_diff_max_min_coding_block_size * 2);

  1308.             for (i = 0; i < sps->log2_diff_max_min_coding_block_size; i++) {

  1309.                 int m = 1 << i;

  1310.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1311.             }

  1312.             pps->min_cb_addr_zs[y * sps->min_cb_width + x] = val;

  1313.         }

  1314.     }

  1315. 

  1316.     log2_diff_ctb_min_tb_size = sps->log2_ctb_size - sps->log2_min_tb_size;

  1317.     for (y = 0; y < sps->min_tb_height; y++) {

  1318.         for (x = 0; x < sps->min_tb_width; x++) {

  1319.             int tb_x        = x >> log2_diff_ctb_min_tb_size;

  1320.             int tb_y        = y >> log2_diff_ctb_min_tb_size;

  1321.             int ctb_addr_rs = sps->ctb_width * tb_y + tb_x;

  1322.             int val         = pps->ctb_addr_rs_to_ts[ctb_addr_rs] <<

  1323.                               (log2_diff_ctb_min_tb_size * 2);

  1324.             for (i = 0; i < log2_diff_ctb_min_tb_size; i++) {

  1325.                 int m = 1 << i;

  1326.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1327.             }

  1328.             pps->min_tb_addr_zs[y * sps->min_tb_width + x] = val;

  1329.         }

  1330.     }

  1331. 

  1332.     av_buffer_unref(&s->pps_list[pps_id]);

  1333.     s->pps_list[pps_id] = pps_buf;

  1334. 

  1335.     return 0;

  1336. 

  1337. err:

  1338.     av_buffer_unref(&pps_buf);

  1339.     return ret;

  1340. }