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FFmpeg/libavcodec/hevc_ps.c

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  1. /*

  2.  * HEVC Parameter Set decoding

  3.  *

  4.  * Copyright (C) 2012 - 2103 Guillaume Martres

  5.  * Copyright (C) 2012 - 2103 Mickael Raulet

  6.  * Copyright (C) 2012 - 2013 Gildas Cocherel

  7.  * Copyright (C) 2013 Vittorio Giovara

  8.  *

  9.  * This file is part of FFmpeg.

  10.  *

  11.  * FFmpeg is free software; you can redistribute it and/or

  12.  * modify it under the terms of the GNU Lesser General Public

  13.  * License as published by the Free Software Foundation; either

  14.  * version 2.1 of the License, or (at your option) any later version.

  15.  *

  16.  * FFmpeg is distributed in the hope that it will be useful,

  17.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  18.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  19.  * Lesser General Public License for more details.

  20.  *

  21.  * You should have received a copy of the GNU Lesser General Public

  22.  * License along with FFmpeg; if not, write to the Free Software

  23.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  24.  */

  25. 

  26. #include "libavutil/imgutils.h"

  27. #include "golomb.h"

  28. #include "hevc.h"

  29. 

  30. static const uint8_t default_scaling_list_intra[] = {

  31.     16, 16, 16, 16, 17, 18, 21, 24,

  32.     16, 16, 16, 16, 17, 19, 22, 25,

  33.     16, 16, 17, 18, 20, 22, 25, 29,

  34.     16, 16, 18, 21, 24, 27, 31, 36,

  35.     17, 17, 20, 24, 30, 35, 41, 47,

  36.     18, 19, 22, 27, 35, 44, 54, 65,

  37.     21, 22, 25, 31, 41, 54, 70, 88,

  38.     24, 25, 29, 36, 47, 65, 88, 115

  39. };

  40. 

  41. static const uint8_t default_scaling_list_inter[] = {

  42.     16, 16, 16, 16, 17, 18, 20, 24,

  43.     16, 16, 16, 17, 18, 20, 24, 25,

  44.     16, 16, 17, 18, 20, 24, 25, 28,

  45.     16, 17, 18, 20, 24, 25, 28, 33,

  46.     17, 18, 20, 24, 25, 28, 33, 41,

  47.     18, 20, 24, 25, 28, 33, 41, 54,

  48.     20, 24, 25, 28, 33, 41, 54, 71,

  49.     24, 25, 28, 33, 41, 54, 71, 91

  50. };

  51. 

  52. static const AVRational vui_sar[] = {

  53.     {  0,   1 },

  54.     {  1,   1 },

  55.     { 12,  11 },

  56.     { 10,  11 },

  57.     { 16,  11 },

  58.     { 40,  33 },

  59.     { 24,  11 },

  60.     { 20,  11 },

  61.     { 32,  11 },

  62.     { 80,  33 },

  63.     { 18,  11 },

  64.     { 15,  11 },

  65.     { 64,  33 },

  66.     { 160, 99 },

  67.     {  4,   3 },

  68.     {  3,   2 },

  69.     {  2,   1 },

  70. };

  71. 

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

  73.                                   const HEVCSPS *sps, int is_slice_header)

  74. {

  75.     HEVCLocalContext *lc = s->HEVClc;

  76.     uint8_t rps_predict = 0;

  77.     int delta_poc;

  78.     int k0 = 0;

  79.     int k1 = 0;

  80.     int k  = 0;

  81.     int i;

  82. 

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

  84. 

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

  86.         rps_predict = get_bits1(gb);

  87. 

  88.     if (rps_predict) {

  89.         const ShortTermRPS *rps_ridx;

  90.         int delta_rps;

  91.         unsigned abs_delta_rps;

  92.         uint8_t use_delta_flag = 0;

  93.         uint8_t delta_rps_sign;

  94. 

  95.         if (is_slice_header) {

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

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

  98.                 av_log(s->avctx, AV_LOG_ERROR,

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

  100.                        delta_idx, sps->nb_st_rps);

  101.                 return AVERROR_INVALIDDATA;

  102.             }

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

  104.         } else

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

  106. 

  107.         delta_rps_sign = get_bits1(gb);

  108.         abs_delta_rps  = get_ue_golomb_long(gb) + 1;

  109.         if (abs_delta_rps < 1 || abs_delta_rps > 32768) {

  110.             av_log(s->avctx, AV_LOG_ERROR,

  111.                    "Invalid value of abs_delta_rps: %d\n",

  112.                    abs_delta_rps);

  113.             return AVERROR_INVALIDDATA;

  114.         }

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

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

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

  118. 

  119.             if (!used)

  120.                 use_delta_flag = get_bits1(gb);

  121. 

  122.             if (used || use_delta_flag) {

  123.                 if (i < rps_ridx->num_delta_pocs)

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

  125.                 else

  126.                     delta_poc = delta_rps;

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

  128.                 if (delta_poc < 0)

  129.                     k0++;

  130.                 else

  131.                     k1++;

  132.                 k++;

  133.             }

  134.         }

  135. 

  136.         rps->num_delta_pocs    = k;

  137.         rps->num_negative_pics = k0;

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

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

  140.             int used, tmp;

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

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

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

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

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

  146.                     if (delta_poc < tmp) {

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

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

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

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

  151.                     }

  152.                 }

  153.             }

  154.         }

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

  156.             int used;

  157.             k = rps->num_negative_pics - 1;

  158.             // flip the negative values to largest first

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

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

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

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

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

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

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

  166.                 k--;

  167.             }

  168.         }

  169.     } else {

  170.         unsigned int prev, nb_positive_pics;

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

  172.         nb_positive_pics       = get_ue_golomb_long(gb);

  173. 

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

  175.             nb_positive_pics >= MAX_REFS) {

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

  177.             return AVERROR_INVALIDDATA;

  178.         }

  179. 

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

  181.         if (rps->num_delta_pocs) {

  182.             prev = 0;

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

  184.                 delta_poc = get_ue_golomb_long(gb) + 1;

  185.                 prev -= delta_poc;

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

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

  188.             }

  189.             prev = 0;

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

  191.                 delta_poc = get_ue_golomb_long(gb) + 1;

  192.                 prev += delta_poc;

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

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

  195.             }

  196.         }

  197.     }

  198.     return 0;

  199. }

  200. 

  201. 

  202. static int decode_profile_tier_level(HEVCContext *s, PTLCommon *ptl)

  203. {

  204.     int i;

  205.     HEVCLocalContext *lc = s->HEVClc;

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

  207. 

  208.     if (get_bits_left(gb) < 2+1+5 + 32 + 4 + 16 + 16 + 12)

  209.         return -1;

  210. 

  211.     ptl->profile_space = get_bits(gb, 2);

  212.     ptl->tier_flag     = get_bits1(gb);

  213.     ptl->profile_idc   = get_bits(gb, 5);

  214.     if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN)

  215.         av_log(s->avctx, AV_LOG_DEBUG, "Main profile bitstream\n");

  216.     else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_10)

  217.         av_log(s->avctx, AV_LOG_DEBUG, "Main 10 profile bitstream\n");

  218.     else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_STILL_PICTURE)

  219.         av_log(s->avctx, AV_LOG_DEBUG, "Main Still Picture profile bitstream\n");

  220.     else if (ptl->profile_idc == FF_PROFILE_HEVC_REXT)

  221.         av_log(s->avctx, AV_LOG_DEBUG, "Range Extension profile bitstream\n");

  222.     else

  223.         av_log(s->avctx, AV_LOG_WARNING, "Unknown HEVC profile: %d\n", ptl->profile_idc);

  224. 

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

  226.         ptl->profile_compatibility_flag[i] = get_bits1(gb);

  227.     ptl->progressive_source_flag    = get_bits1(gb);

  228.     ptl->interlaced_source_flag     = get_bits1(gb);

  229.     ptl->non_packed_constraint_flag = get_bits1(gb);

  230.     ptl->frame_only_constraint_flag = get_bits1(gb);

  231. 

  232.     skip_bits(gb, 16); // XXX_reserved_zero_44bits[0..15]

  233.     skip_bits(gb, 16); // XXX_reserved_zero_44bits[16..31]

  234.     skip_bits(gb, 12); // XXX_reserved_zero_44bits[32..43]

  235. 

  236.     return 0;

  237. }

  238. 

  239. static int parse_ptl(HEVCContext *s, PTL *ptl, int max_num_sub_layers)

  240. {

  241.     int i;

  242.     HEVCLocalContext *lc = s->HEVClc;

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

  244.     if (decode_profile_tier_level(s, &ptl->general_ptl) < 0 ||

  245.         get_bits_left(gb) < 8 + 8*2) {

  246.         av_log(s->avctx, AV_LOG_ERROR, "PTL information too short\n");

  247.         return -1;

  248.     }

  249. 

  250.     ptl->general_ptl.level_idc = get_bits(gb, 8);

  251. 

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

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

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

  255.     }

  256. 

  257.     if (max_num_sub_layers - 1> 0)

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

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

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

  261.         if (ptl->sub_layer_profile_present_flag[i] &&

  262.             decode_profile_tier_level(s, &ptl->sub_layer_ptl[i]) < 0) {

  263.             av_log(s->avctx, AV_LOG_ERROR,

  264.                    "PTL information for sublayer %i too short\n", i);

  265.             return -1;

  266.         }

  267.         if (ptl->sub_layer_level_present_flag[i]) {

  268.             if (get_bits_left(gb) < 8) {

  269.                 av_log(s->avctx, AV_LOG_ERROR,

  270.                        "Not enough data for sublayer %i level_idc\n", i);

  271.                 return -1;

  272.             } else

  273.                 ptl->sub_layer_ptl[i].level_idc = get_bits(gb, 8);

  274.         }

  275.     }

  276. 

  277.     return 0;

  278. }

  279. 

  280. static void decode_sublayer_hrd(HEVCContext *s, unsigned int nb_cpb,

  281.                                 int subpic_params_present)

  282. {

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

  284.     int i;

  285. 

  286.     for (i = 0; i < nb_cpb; i++) {

  287.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  288.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  289. 

  290.         if (subpic_params_present) {

  291.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  292.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  293.         }

  294.         skip_bits1(gb); // cbr_flag

  295.     }

  296. }

  297. 

  298. static int decode_hrd(HEVCContext *s, int common_inf_present,

  299.                        int max_sublayers)

  300. {

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

  302.     int nal_params_present = 0, vcl_params_present = 0;

  303.     int subpic_params_present = 0;

  304.     int i;

  305. 

  306.     if (common_inf_present) {

  307.         nal_params_present = get_bits1(gb);

  308.         vcl_params_present = get_bits1(gb);

  309. 

  310.         if (nal_params_present || vcl_params_present) {

  311.             subpic_params_present = get_bits1(gb);

  312. 

  313.             if (subpic_params_present) {

  314.                 skip_bits(gb, 8); // tick_divisor_minus2

  315.                 skip_bits(gb, 5); // du_cpb_removal_delay_increment_length_minus1

  316.                 skip_bits(gb, 1); // sub_pic_cpb_params_in_pic_timing_sei_flag

  317.                 skip_bits(gb, 5); // dpb_output_delay_du_length_minus1

  318.             }

  319. 

  320.             skip_bits(gb, 4); // bit_rate_scale

  321.             skip_bits(gb, 4); // cpb_size_scale

  322. 

  323.             if (subpic_params_present)

  324.                 skip_bits(gb, 4);  // cpb_size_du_scale

  325. 

  326.             skip_bits(gb, 5); // initial_cpb_removal_delay_length_minus1

  327.             skip_bits(gb, 5); // au_cpb_removal_delay_length_minus1

  328.             skip_bits(gb, 5); // dpb_output_delay_length_minus1

  329.         }

  330.     }

  331. 

  332.     for (i = 0; i < max_sublayers; i++) {

  333.         int low_delay = 0;

  334.         unsigned int nb_cpb = 1;

  335.         int fixed_rate = get_bits1(gb);

  336. 

  337.         if (!fixed_rate)

  338.             fixed_rate = get_bits1(gb);

  339. 

  340.         if (fixed_rate)

  341.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  342.         else

  343.             low_delay = get_bits1(gb);

  344. 

  345.         if (!low_delay) {

  346.             nb_cpb = get_ue_golomb_long(gb) + 1;

  347.             if (nb_cpb < 1 || nb_cpb > 32) {

  348.                 av_log(s->avctx, AV_LOG_ERROR, "nb_cpb %d invalid\n", nb_cpb);

  349.                 return AVERROR_INVALIDDATA;

  350.             }

  351.         }

  352. 

  353.         if (nal_params_present)

  354.             decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

  355.         if (vcl_params_present)

  356.             decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

  357.     }

  358.     return 0;

  359. }

  360. 

  361. int ff_hevc_decode_nal_vps(HEVCContext *s)

  362. {

  363.     int i,j;

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

  365.     int vps_id = 0;

  366.     HEVCVPS *vps;

  367.     AVBufferRef *vps_buf = av_buffer_allocz(sizeof(*vps));

  368. 

  369.     if (!vps_buf)

  370.         return AVERROR(ENOMEM);

  371.     vps = (HEVCVPS*)vps_buf->data;

  372. 

  373.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding VPS\n");

  374. 

  375.     vps_id = get_bits(gb, 4);

  376.     if (vps_id >= MAX_VPS_COUNT) {

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

  378.         goto err;

  379.     }

  380. 

  381.     if (get_bits(gb, 2) != 3) { // vps_reserved_three_2bits

  382.         av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_three_2bits is not three\n");

  383.         goto err;

  384.     }

  385. 

  386.     vps->vps_max_layers               = get_bits(gb, 6) + 1;

  387.     vps->vps_max_sub_layers           = get_bits(gb, 3) + 1;

  388.     vps->vps_temporal_id_nesting_flag = get_bits1(gb);

  389. 

  390.     if (get_bits(gb, 16) != 0xffff) { // vps_reserved_ffff_16bits

  391.         av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_ffff_16bits is not 0xffff\n");

  392.         goto err;

  393.     }

  394. 

  395.     if (vps->vps_max_sub_layers > MAX_SUB_LAYERS) {

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

  397.                vps->vps_max_sub_layers);

  398.         goto err;

  399.     }

  400. 

  401.     if (parse_ptl(s, &vps->ptl, vps->vps_max_sub_layers) < 0)

  402.         goto err;

  403. 

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

  405. 

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

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

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

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

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

  411. 

  412.         if (vps->vps_max_dec_pic_buffering[i] > MAX_DPB_SIZE || !vps->vps_max_dec_pic_buffering[i]) {

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

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

  415.             goto err;

  416.         }

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

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

  419.                    vps->vps_num_reorder_pics[i]);

  420.             if (s->avctx->err_recognition & AV_EF_EXPLODE)

  421.                 goto err;

  422.         }

  423.     }

  424. 

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

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

  427.     if ((vps->vps_num_layer_sets - 1LL) * (vps->vps_max_layer_id + 1LL) > get_bits_left(gb)) {

  428.         av_log(s->avctx, AV_LOG_ERROR, "too many layer_id_included_flags\n");

  429.         goto err;

  430.     }

  431. 

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

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

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

  435. 

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

  437.     if (vps->vps_timing_info_present_flag) {

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

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

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

  441.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  445.             int common_inf_present = 1;

  446. 

  447.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  448.             if (i)

  449.                 common_inf_present = get_bits1(gb);

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

  451.         }

  452.     }

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

  454. 

  455.     if (get_bits_left(gb) < 0) {

  456.         av_log(s->avctx, AV_LOG_ERROR,

  457.                "Overread VPS by %d bits\n", -get_bits_left(gb));

  458.         goto err;

  459.     }

  460. 

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

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

  463.     return 0;

  464. 

  465. err:

  466.     av_buffer_unref(&vps_buf);

  467.     return AVERROR_INVALIDDATA;

  468. }

  469. 

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

  471. {

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

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

  474.     GetBitContext backup;

  475.     int sar_present, alt = 0;

  476. 

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

  478. 

  479.     sar_present = get_bits1(gb);

  480.     if (sar_present) {

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

  482.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  484.         else if (sar_idx == 255) {

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

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

  487.         } else

  488.             av_log(s->avctx, AV_LOG_WARNING,

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

  490.     }

  491. 

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

  493.     if (vui->overscan_info_present_flag)

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

  495. 

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

  497.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  502.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  503.         if (vui->colour_description_present_flag) {

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

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

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

  507. 

  508.             // Set invalid values to "unspecified"

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

  510.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  512.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  514.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

  515.         }

  516.     }

  517. 

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

  519.     if (vui->chroma_loc_info_present_flag) {

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

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

  522.     }

  523. 

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

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

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

  527. 

  528.     if (get_bits_left(gb) >= 68 && show_bits_long(gb, 21) == 0x100000) {

  529.         vui->default_display_window_flag = 0;

  530.         av_log(s->avctx, AV_LOG_WARNING, "Invalid default display window\n");

  531.     } else

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

  533.     // Backup context in case an alternate header is detected

  534.     memcpy(&backup, gb, sizeof(backup));

  535. 

  536.     if (vui->default_display_window_flag) {

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

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

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

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

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

  542. 

  543.         if (s->apply_defdispwin &&

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

  545.             av_log(s->avctx, AV_LOG_DEBUG,

  546.                    "discarding vui default display window, "

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

  548.                    vui->def_disp_win.left_offset,

  549.                    vui->def_disp_win.right_offset,

  550.                    vui->def_disp_win.top_offset,

  551.                    vui->def_disp_win.bottom_offset);

  552. 

  553.             vui->def_disp_win.left_offset   =

  554.             vui->def_disp_win.right_offset  =

  555.             vui->def_disp_win.top_offset    =

  556.             vui->def_disp_win.bottom_offset = 0;

  557.         }

  558.     }

  559. 

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

  561. 

  562.     if (vui->vui_timing_info_present_flag) {

  563.         if( get_bits_left(gb) < 66) {

  564.             // The alternate syntax seem to have timing info located

  565.             // at where def_disp_win is normally located

  566.             av_log(s->avctx, AV_LOG_WARNING,

  567.                    "Strange VUI timing information, retrying...\n");

  568.             vui->default_display_window_flag = 0;

  569.             memset(&vui->def_disp_win, 0, sizeof(vui->def_disp_win));

  570.             memcpy(gb, &backup, sizeof(backup));

  571.             alt = 1;

  572.         }

  573.         vui->vui_num_units_in_tick               = get_bits_long(gb, 32);

  574.         vui->vui_time_scale                      = get_bits_long(gb, 32);

  575.         if (alt) {

  576.             av_log(s->avctx, AV_LOG_INFO, "Retry got %i/%i fps\n",

  577.                    vui->vui_time_scale, vui->vui_num_units_in_tick);

  578.         }

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

  580.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  583.         if (vui->vui_hrd_parameters_present_flag)

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

  585.     }

  586. 

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

  588.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  597.     }

  598. }

  599. 

  600. static void set_default_scaling_list_data(ScalingList *sl)

  601. {

  602.     int matrixId;

  603. 

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

  605.         // 4x4 default is 16

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

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

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

  609.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

  623.     memcpy(sl->sl[3][1], default_scaling_list_intra, 64);

  624.     memcpy(sl->sl[3][2], default_scaling_list_intra, 64);

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

  626.     memcpy(sl->sl[3][4], default_scaling_list_inter, 64);

  627.     memcpy(sl->sl[3][5], default_scaling_list_inter, 64);

  628. }

  629. 

  630. static int scaling_list_data(HEVCContext *s, ScalingList *sl, HEVCSPS *sps)

  631. {

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

  633.     uint8_t scaling_list_pred_mode_flag;

  634.     int32_t scaling_list_dc_coef[2][6];

  635.     int size_id, matrix_id, pos;

  636.     int i;

  637. 

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

  639.         for (matrix_id = 0; matrix_id < 6; matrix_id += ((size_id == 3) ? 3 : 1)) {

  640.             scaling_list_pred_mode_flag = get_bits1(gb);

  641.             if (!scaling_list_pred_mode_flag) {

  642.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  645.                 if (delta) {

  646.                     // Copy from previous array.

  647.                     if (matrix_id < delta) {

  648.                         av_log(s->avctx, AV_LOG_ERROR,

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

  650.                         return AVERROR_INVALIDDATA;

  651.                     }

  652. 

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

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

  655.                            size_id > 0 ? 64 : 16);

  656.                     if (size_id > 1)

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

  658.                 }

  659.             } else {

  660.                 int next_coef, coef_num;

  661.                 int32_t scaling_list_delta_coef;

  662. 

  663.                 next_coef = 8;

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

  665.                 if (size_id > 1) {

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

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

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

  669.                 }

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

  671.                     if (size_id == 0)

  672.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  673.                                   ff_hevc_diag_scan4x4_x[i];

  674.                     else

  675.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  676.                                   ff_hevc_diag_scan8x8_x[i];

  677. 

  678.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  681.                 }

  682.             }

  683.         }

  684. 

  685.     if (sps->chroma_format_idc == 3) {

  686.         for (i = 0; i < 64; i++) {

  687.             sl->sl[3][1][i] = sl->sl[2][1][i];

  688.             sl->sl[3][2][i] = sl->sl[2][2][i];

  689.             sl->sl[3][4][i] = sl->sl[2][4][i];

  690.             sl->sl[3][5][i] = sl->sl[2][5][i];

  691.         }

  692.         sl->sl_dc[1][1] = sl->sl_dc[0][1];

  693.         sl->sl_dc[1][2] = sl->sl_dc[0][2];

  694.         sl->sl_dc[1][4] = sl->sl_dc[0][4];

  695.         sl->sl_dc[1][5] = sl->sl_dc[0][5];

  696.     }

  697. 

  698. 

  699.     return 0;

  700. }

  701. 

  702. int ff_hevc_decode_nal_sps(HEVCContext *s)

  703. {

  704.     const AVPixFmtDescriptor *desc;

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

  706.     int ret = 0;

  707.     unsigned int sps_id = 0;

  708.     int log2_diff_max_min_transform_block_size;

  709.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  710.     int i;

  711. 

  712.     HEVCSPS *sps;

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

  714. 

  715.     if (!sps_buf)

  716.         return AVERROR(ENOMEM);

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

  718. 

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

  720. 

  721.     // Coded parameters

  722. 

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

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

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

  726.         ret = AVERROR_INVALIDDATA;

  727.         goto err;

  728.     }

  729. 

  730.     if (!s->vps_list[sps->vps_id]) {

  731.         av_log(s->avctx, AV_LOG_ERROR, "VPS %d does not exist\n",

  732.                sps->vps_id);

  733.         ret = AVERROR_INVALIDDATA;

  734.         goto err;

  735.     }

  736. 

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

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

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

  740.                sps->max_sub_layers);

  741.         ret = AVERROR_INVALIDDATA;

  742.         goto err;

  743.     }

  744. 

  745.     skip_bits1(gb); // temporal_id_nesting_flag

  746. 

  747.     if (parse_ptl(s, &sps->ptl, sps->max_sub_layers) < 0)

  748.         goto err;

  749. 

  750.     sps_id = get_ue_golomb_long(gb);

  751.     if (sps_id >= MAX_SPS_COUNT) {

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

  753.         ret = AVERROR_INVALIDDATA;

  754.         goto err;

  755.     }

  756. 

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

  758.     if (!(sps->chroma_format_idc == 1 || sps->chroma_format_idc == 2 || sps->chroma_format_idc == 3)) {

  759.         avpriv_report_missing_feature(s->avctx, "chroma_format_idc != {1, 2, 3}\n");

  760.         ret = AVERROR_PATCHWELCOME;

  761.         goto err;

  762.     }

  763. 

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

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

  766. 

  767.     if (sps->separate_colour_plane_flag)

  768.         sps->chroma_format_idc = 0;

  769. 

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

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

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

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

  774.         goto err;

  775. 

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

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

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

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

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

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

  782. 

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

  784.             av_log(s->avctx, AV_LOG_DEBUG,

  785.                    "discarding sps conformance window, "

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

  787.                    sps->pic_conf_win.left_offset,

  788.                    sps->pic_conf_win.right_offset,

  789.                    sps->pic_conf_win.top_offset,

  790.                    sps->pic_conf_win.bottom_offset);

  791. 

  792.             sps->pic_conf_win.left_offset   =

  793.             sps->pic_conf_win.right_offset  =

  794.             sps->pic_conf_win.top_offset    =

  795.             sps->pic_conf_win.bottom_offset = 0;

  796.         }

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

  798.     }

  799. 

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

  801.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  803.         av_log(s->avctx, AV_LOG_ERROR,

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

  805.                "this is unsupported.\n",

  806.                sps->bit_depth, bit_depth_chroma);

  807.         ret = AVERROR_INVALIDDATA;

  808.         goto err;

  809.     }

  810. 

  811.     switch (sps->bit_depth) {

  812.     case 8:

  813.         if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P;

  814.         if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P;

  815.         if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P;

  816.        break;

  817.     case 9:

  818.         if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P9;

  819.         if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P9;

  820.         if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P9;

  821.         break;

  822.     case 10:

  823.         if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P10;

  824.         if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P10;

  825.         if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P10;

  826.         break;

  827.     case 12:

  828.         if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P12;

  829.         if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P12;

  830.         if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P12;

  831.         break;

  832.     default:

  833.         av_log(s->avctx, AV_LOG_ERROR,

  834.                "4:2:0, 4:2:2, 4:4:4 supports are currently specified for 8, 10 and 12 bits.\n");

  835.         ret = AVERROR_PATCHWELCOME;

  836.         goto err;

  837.     }

  838. 

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

  840.     if (!desc) {

  841.         ret = AVERROR(EINVAL);

  842.         goto err;

  843.     }

  844. 

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

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

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

  848. 

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

  850. 

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

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

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

  854.                sps->log2_max_poc_lsb - 4);

  855.         ret = AVERROR_INVALIDDATA;

  856.         goto err;

  857.     }

  858. 

  859.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  868.             ret = AVERROR_INVALIDDATA;

  869.             goto err;

  870.         }

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

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

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

  874.             if (s->avctx->err_recognition & AV_EF_EXPLODE ||

  875.                 sps->temporal_layer[i].num_reorder_pics > MAX_DPB_SIZE - 1) {

  876.                 ret = AVERROR_INVALIDDATA;

  877.                 goto err;

  878.             }

  879.             sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[i].num_reorder_pics + 1;

  880.         }

  881.     }

  882. 

  883.     if (!sublayer_ordering_info) {

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

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

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

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

  888.         }

  889.     }

  890. 

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

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

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

  894.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  895.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  896.                                                sps->log2_min_tb_size;

  897. 

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

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

  900.         ret = AVERROR_INVALIDDATA;

  901.         goto err;

  902.     }

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

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

  905. 

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

  907.     if (sps->scaling_list_enable_flag) {

  908.         set_default_scaling_list_data(&sps->scaling_list);

  909. 

  910.         if (get_bits1(gb)) {

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

  912.             if (ret < 0)

  913.                 goto err;

  914.         }

  915.     }

  916. 

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

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

  919. 

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

  921.     if (sps->pcm_enabled_flag) {

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

  923.         sps->pcm.bit_depth_chroma = get_bits(gb, 4) + 1;

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

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

  926.                                         get_ue_golomb_long(gb);

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

  928.             av_log(s->avctx, AV_LOG_ERROR,

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

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

  931.             ret = AVERROR_INVALIDDATA;

  932.             goto err;

  933.         }

  934. 

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

  936.     }

  937. 

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

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

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

  941.                sps->nb_st_rps);

  942.         ret = AVERROR_INVALIDDATA;

  943.         goto err;

  944.     }

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

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

  947.                                                  sps, 0)) < 0)

  948.             goto err;

  949.     }

  950. 

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

  952.     if (sps->long_term_ref_pics_present_flag) {

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

  954.         if (sps->num_long_term_ref_pics_sps > 31U) {

  955.             av_log(0, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",

  956.                    sps->num_long_term_ref_pics_sps);

  957.             goto err;

  958.         }

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

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

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

  962.         }

  963.     }

  964. 

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

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

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

  968.     vui_present = get_bits1(gb);

  969.     if (vui_present)

  970.         decode_vui(s, sps);

  971. 

  972.     if (get_bits1(gb)) { // sps_extension_flag

  973.         int sps_extension_flag[1];

  974.         for (i = 0; i < 1; i++)

  975.             sps_extension_flag[i] = get_bits1(gb);

  976.         skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);

  977.         if (sps_extension_flag[0]) {

  978.             int extended_precision_processing_flag;

  979.             int high_precision_offsets_enabled_flag;

  980.             int cabac_bypass_alignment_enabled_flag;

  981. 

  982.             sps->transform_skip_rotation_enabled_flag = get_bits1(gb);

  983.             sps->transform_skip_context_enabled_flag  = get_bits1(gb);

  984.             sps->implicit_rdpcm_enabled_flag = get_bits1(gb);

  985. 

  986.             sps->explicit_rdpcm_enabled_flag = get_bits1(gb);

  987. 

  988.             extended_precision_processing_flag = get_bits1(gb);

  989.             if (extended_precision_processing_flag)

  990.                 av_log(s->avctx, AV_LOG_WARNING,

  991.                    "extended_precision_processing_flag not yet implemented\n");

  992. 

  993.             sps->intra_smoothing_disabled_flag       = get_bits1(gb);

  994.             high_precision_offsets_enabled_flag  = get_bits1(gb);

  995.             if (high_precision_offsets_enabled_flag)

  996.                 av_log(s->avctx, AV_LOG_WARNING,

  997.                    "high_precision_offsets_enabled_flag not yet implemented\n");

  998. 

  999.             sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);

  1000. 

  1001.             cabac_bypass_alignment_enabled_flag  = get_bits1(gb);

  1002.             if (cabac_bypass_alignment_enabled_flag)

  1003.                 av_log(s->avctx, AV_LOG_WARNING,

  1004.                    "cabac_bypass_alignment_enabled_flag not yet implemented\n");

  1005.         }

  1006.     }

  1007.     if (s->apply_defdispwin) {

  1008.         sps->output_window.left_offset   += sps->vui.def_disp_win.left_offset;

  1009.         sps->output_window.right_offset  += sps->vui.def_disp_win.right_offset;

  1010.         sps->output_window.top_offset    += sps->vui.def_disp_win.top_offset;

  1011.         sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

  1012.     }

  1013.     if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) &&

  1014.         !(s->avctx->flags & CODEC_FLAG_UNALIGNED)) {

  1015.         sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));

  1016.         av_log(s->avctx, AV_LOG_WARNING, "Reducing left output window to %d "

  1017.                "chroma samples to preserve alignment.\n",

  1018.                sps->output_window.left_offset);

  1019.     }

  1020.     sps->output_width  = sps->width -

  1021.                          (sps->output_window.left_offset + sps->output_window.right_offset);

  1022.     sps->output_height = sps->height -

  1023.                          (sps->output_window.top_offset + sps->output_window.bottom_offset);

  1024.     if (sps->output_width <= 0 || sps->output_height <= 0) {

  1025.         av_log(s->avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",

  1026.                sps->output_width, sps->output_height);

  1027.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  1028.             ret = AVERROR_INVALIDDATA;

  1029.             goto err;

  1030.         }

  1031.         av_log(s->avctx, AV_LOG_WARNING,

  1032.                "Displaying the whole video surface.\n");

  1033.         memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));

  1034.         memset(&sps->output_window, 0, sizeof(sps->output_window));

  1035.         sps->output_width               = sps->width;

  1036.         sps->output_height              = sps->height;

  1037.     }

  1038. 

  1039.     // Inferred parameters

  1040.     sps->log2_ctb_size = sps->log2_min_cb_size +

  1041.                          sps->log2_diff_max_min_coding_block_size;

  1042.     sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

  1043. 

  1044.     sps->ctb_width  = (sps->width  + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1045.     sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1046.     sps->ctb_size   = sps->ctb_width * sps->ctb_height;

  1047. 

  1048.     sps->min_cb_width  = sps->width  >> sps->log2_min_cb_size;

  1049.     sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

  1050.     sps->min_tb_width  = sps->width  >> sps->log2_min_tb_size;

  1051.     sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

  1052.     sps->min_pu_width  = sps->width  >> sps->log2_min_pu_size;

  1053.     sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

  1054.     sps->tb_mask       = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;

  1055. 

  1056.     sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

  1057. 

  1058.     if (sps->width  & ((1 << sps->log2_min_cb_size) - 1) ||

  1059.         sps->height & ((1 << sps->log2_min_cb_size) - 1)) {

  1060.         av_log(s->avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  1061.         goto err;

  1062.     }

  1063. 

  1064.     if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {

  1065.         av_log(s->avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);

  1066.         goto err;

  1067.     }

  1068.     if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1069.         av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

  1070.                sps->max_transform_hierarchy_depth_inter);

  1071.         goto err;

  1072.     }

  1073.     if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1074.         av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  1075.                sps->max_transform_hierarchy_depth_intra);

  1076.         goto err;

  1077.     }

  1078.     if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

  1079.         av_log(s->avctx, AV_LOG_ERROR,

  1080.                "max transform block size out of range: %d\n",

  1081.                sps->log2_max_trafo_size);

  1082.         goto err;

  1083.     }

  1084. 

  1085.     if (get_bits_left(gb) < 0) {

  1086.         av_log(s->avctx, AV_LOG_ERROR,

  1087.                "Overread SPS by %d bits\n", -get_bits_left(gb));

  1088.         goto err;

  1089.     }

  1090. 

  1091.     if (s->avctx->debug & FF_DEBUG_BITSTREAM) {

  1092.         av_log(s->avctx, AV_LOG_DEBUG,

  1093.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1094.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1095.                sps_id, sps->width, sps->height,

  1096.                sps->output_width, sps->output_height,

  1097.                av_get_pix_fmt_name(sps->pix_fmt));

  1098.     }

  1099. 

  1100.     /* check if this is a repeat of an already parsed SPS, then keep the

  1101.      * original one.

  1102.      * otherwise drop all PPSes that depend on it */

  1103.     if (s->sps_list[sps_id] &&

  1104.         !memcmp(s->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1105.         av_buffer_unref(&sps_buf);

  1106.     } else {

  1107.         for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++) {

  1108.             if (s->pps_list[i] && ((HEVCPPS*)s->pps_list[i]->data)->sps_id == sps_id)

  1109.                 av_buffer_unref(&s->pps_list[i]);

  1110.         }

  1111.         if (s->sps_list[sps_id] && s->sps == (HEVCSPS*)s->sps_list[sps_id]->data) {

  1112.             av_buffer_unref(&s->current_sps);

  1113.             s->current_sps = av_buffer_ref(s->sps_list[sps_id]);

  1114.             if (!s->current_sps)

  1115.                 s->sps = NULL;

  1116.         }

  1117.         av_buffer_unref(&s->sps_list[sps_id]);

  1118.         s->sps_list[sps_id] = sps_buf;

  1119.     }

  1120. 

  1121.     return 0;

  1122. 

  1123. err:

  1124.     av_buffer_unref(&sps_buf);

  1125.     return ret;

  1126. }

  1127. 

  1128. static void hevc_pps_free(void *opaque, uint8_t *data)

  1129. {

  1130.     HEVCPPS *pps = (HEVCPPS*)data;

  1131. 

  1132.     av_freep(&pps->column_width);

  1133.     av_freep(&pps->row_height);

  1134.     av_freep(&pps->col_bd);

  1135.     av_freep(&pps->row_bd);

  1136.     av_freep(&pps->col_idxX);

  1137.     av_freep(&pps->ctb_addr_rs_to_ts);

  1138.     av_freep(&pps->ctb_addr_ts_to_rs);

  1139.     av_freep(&pps->tile_pos_rs);

  1140.     av_freep(&pps->tile_id);

  1141.     av_freep(&pps->min_tb_addr_zs_tab);

  1142. 

  1143.     av_freep(&pps);

  1144. }

  1145. 

  1146. static int pps_range_extensions(HEVCContext *s, HEVCPPS *pps, HEVCSPS *sps) {

  1147.     GetBitContext *gb = &s->HEVClc->gb;

  1148.     int i;

  1149. 

  1150.     if (pps->transform_skip_enabled_flag) {

  1151.         pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;

  1152.     }

  1153.     pps->cross_component_prediction_enabled_flag = get_bits1(gb);

  1154.     pps->chroma_qp_offset_list_enabled_flag = get_bits1(gb);

  1155.     if (pps->chroma_qp_offset_list_enabled_flag) {

  1156.         pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);

  1157.         pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);

  1158.         if (pps->chroma_qp_offset_list_len_minus1 && pps->chroma_qp_offset_list_len_minus1 >= 5) {

  1159.             av_log(s->avctx, AV_LOG_ERROR,

  1160.                    "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");

  1161.             return AVERROR_INVALIDDATA;

  1162.         }

  1163.         for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {

  1164.             pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);

  1165.             if (pps->cb_qp_offset_list[i]) {

  1166.                 av_log(s->avctx, AV_LOG_WARNING,

  1167.                        "cb_qp_offset_list not tested yet.\n");

  1168.             }

  1169.             pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);

  1170.             if (pps->cr_qp_offset_list[i]) {

  1171.                 av_log(s->avctx, AV_LOG_WARNING,

  1172.                        "cb_qp_offset_list not tested yet.\n");

  1173.             }

  1174.         }

  1175.     }

  1176.     pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);

  1177.     pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);

  1178. 

  1179.     return(0);

  1180. }

  1181. 

  1182. int ff_hevc_decode_nal_pps(HEVCContext *s)

  1183. {

  1184.     GetBitContext *gb = &s->HEVClc->gb;

  1185.     HEVCSPS      *sps = NULL;

  1186.     int pic_area_in_ctbs;

  1187.     int log2_diff_ctb_min_tb_size;

  1188.     int i, j, x, y, ctb_addr_rs, tile_id;

  1189.     int ret = 0;

  1190.     unsigned int pps_id = 0;

  1191. 

  1192.     AVBufferRef *pps_buf;

  1193.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1194. 

  1195.     if (!pps)

  1196.         return AVERROR(ENOMEM);

  1197. 

  1198.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1199.                                hevc_pps_free, NULL, 0);

  1200.     if (!pps_buf) {

  1201.         av_freep(&pps);

  1202.         return AVERROR(ENOMEM);

  1203.     }

  1204. 

  1205.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1206. 

  1207.     // Default values

  1208.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1209.     pps->num_tile_columns                      = 1;

  1210.     pps->num_tile_rows                         = 1;

  1211.     pps->uniform_spacing_flag                  = 1;

  1212.     pps->disable_dbf                           = 0;

  1213.     pps->beta_offset                           = 0;

  1214.     pps->tc_offset                             = 0;

  1215.     pps->log2_max_transform_skip_block_size    = 2;

  1216. 

  1217.     // Coded parameters

  1218.     pps_id = get_ue_golomb_long(gb);

  1219.     if (pps_id >= MAX_PPS_COUNT) {

  1220.         av_log(s->avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1221.         ret = AVERROR_INVALIDDATA;

  1222.         goto err;

  1223.     }

  1224.     pps->sps_id = get_ue_golomb_long(gb);

  1225.     if (pps->sps_id >= MAX_SPS_COUNT) {

  1226.         av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1227.         ret = AVERROR_INVALIDDATA;

  1228.         goto err;

  1229.     }

  1230.     if (!s->sps_list[pps->sps_id]) {

  1231.         av_log(s->avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1232.         ret = AVERROR_INVALIDDATA;

  1233.         goto err;

  1234.     }

  1235.     sps = (HEVCSPS *)s->sps_list[pps->sps_id]->data;

  1236. 

  1237.     pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

  1238.     pps->output_flag_present_flag              = get_bits1(gb);

  1239.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1240. 

  1241.     pps->sign_data_hiding_flag = get_bits1(gb);

  1242. 

  1243.     pps->cabac_init_present_flag = get_bits1(gb);

  1244. 

  1245.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1246.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1247. 

  1248.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1249. 

  1250.     pps->constrained_intra_pred_flag = get_bits1(gb);

  1251.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1252. 

  1253.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1254.     pps->diff_cu_qp_delta_depth   = 0;

  1255.     if (pps->cu_qp_delta_enabled_flag)

  1256.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1257. 

  1258.     if (pps->diff_cu_qp_delta_depth < 0 ||

  1259.         pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {

  1260.         av_log(s->avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",

  1261.                pps->diff_cu_qp_delta_depth);

  1262.         ret = AVERROR_INVALIDDATA;

  1263.         goto err;

  1264.     }

  1265. 

  1266.     pps->cb_qp_offset = get_se_golomb(gb);

  1267.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1268.         av_log(s->avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1269.                pps->cb_qp_offset);

  1270.         ret = AVERROR_INVALIDDATA;

  1271.         goto err;

  1272.     }

  1273.     pps->cr_qp_offset = get_se_golomb(gb);

  1274.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1275.         av_log(s->avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1276.                pps->cr_qp_offset);

  1277.         ret = AVERROR_INVALIDDATA;

  1278.         goto err;

  1279.     }

  1280.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1281. 

  1282.     pps->weighted_pred_flag   = get_bits1(gb);

  1283.     pps->weighted_bipred_flag = get_bits1(gb);

  1284. 

  1285.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1286.     pps->tiles_enabled_flag               = get_bits1(gb);

  1287.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1288. 

  1289.     if (pps->tiles_enabled_flag) {

  1290.         pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

  1291.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

  1292.         if (pps->num_tile_columns == 0 ||

  1293.             pps->num_tile_columns >= sps->width) {

  1294.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1295.                    pps->num_tile_columns - 1);

  1296.             ret = AVERROR_INVALIDDATA;

  1297.             goto err;

  1298.         }

  1299.         if (pps->num_tile_rows == 0 ||

  1300.             pps->num_tile_rows >= sps->height) {

  1301.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1302.                    pps->num_tile_rows - 1);

  1303.             ret = AVERROR_INVALIDDATA;

  1304.             goto err;

  1305.         }

  1306. 

  1307.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1308.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1309.         if (!pps->column_width || !pps->row_height) {

  1310.             ret = AVERROR(ENOMEM);

  1311.             goto err;

  1312.         }

  1313. 

  1314.         pps->uniform_spacing_flag = get_bits1(gb);

  1315.         if (!pps->uniform_spacing_flag) {

  1316.             uint64_t sum = 0;

  1317.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1318.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1319.                 sum                 += pps->column_width[i];

  1320.             }

  1321.             if (sum >= sps->ctb_width) {

  1322.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1323.                 ret = AVERROR_INVALIDDATA;

  1324.                 goto err;

  1325.             }

  1326.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1327. 

  1328.             sum = 0;

  1329.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1330.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1331.                 sum               += pps->row_height[i];

  1332.             }

  1333.             if (sum >= sps->ctb_height) {

  1334.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1335.                 ret = AVERROR_INVALIDDATA;

  1336.                 goto err;

  1337.             }

  1338.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1339.         }

  1340.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1341.     }

  1342. 

  1343.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1344. 

  1345.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1346.     if (pps->deblocking_filter_control_present_flag) {

  1347.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1348.         pps->disable_dbf                             = get_bits1(gb);

  1349.         if (!pps->disable_dbf) {

  1350.             pps->beta_offset = get_se_golomb(gb) * 2;

  1351.             pps->tc_offset = get_se_golomb(gb) * 2;

  1352.             if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

  1353.                 av_log(s->avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1354.                        pps->beta_offset/2);

  1355.                 ret = AVERROR_INVALIDDATA;

  1356.                 goto err;

  1357.             }

  1358.             if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

  1359.                 av_log(s->avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1360.                        pps->tc_offset/2);

  1361.                 ret = AVERROR_INVALIDDATA;

  1362.                 goto err;

  1363.             }

  1364.         }

  1365.     }

  1366. 

  1367.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1368.     if (pps->scaling_list_data_present_flag) {

  1369.         set_default_scaling_list_data(&pps->scaling_list);

  1370.         ret = scaling_list_data(s, &pps->scaling_list, sps);

  1371.         if (ret < 0)

  1372.             goto err;

  1373.     }

  1374.     pps->lists_modification_present_flag = get_bits1(gb);

  1375.     pps->log2_parallel_merge_level       = get_ue_golomb_long(gb) + 2;

  1376.     if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {

  1377.         av_log(s->avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1378.                pps->log2_parallel_merge_level - 2);

  1379.         ret = AVERROR_INVALIDDATA;

  1380.         goto err;

  1381.     }

  1382. 

  1383.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1384. 

  1385.     if (get_bits1(gb)) { // pps_extension_present_flag

  1386.         int pps_range_extensions_flag = get_bits1(gb);

  1387.         /* int pps_extension_7bits = */ get_bits(gb, 7);

  1388.         if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {

  1389.             if ((ret = pps_range_extensions(s, pps, sps)) < 0)

  1390.                 goto err;

  1391.         }

  1392.     }

  1393. 

  1394.     // Inferred parameters

  1395.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1396.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1397.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1398.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX) {

  1399.         ret = AVERROR(ENOMEM);

  1400.         goto err;

  1401.     }

  1402. 

  1403.     if (pps->uniform_spacing_flag) {

  1404.         if (!pps->column_width) {

  1405.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1406.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1407.         }

  1408.         if (!pps->column_width || !pps->row_height) {

  1409.             ret = AVERROR(ENOMEM);

  1410.             goto err;

  1411.         }

  1412. 

  1413.         for (i = 0; i < pps->num_tile_columns; i++) {

  1414.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1415.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1416.         }

  1417. 

  1418.         for (i = 0; i < pps->num_tile_rows; i++) {

  1419.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1420.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1421.         }

  1422.     }

  1423. 

  1424.     pps->col_bd[0] = 0;

  1425.     for (i = 0; i < pps->num_tile_columns; i++)

  1426.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1427. 

  1428.     pps->row_bd[0] = 0;

  1429.     for (i = 0; i < pps->num_tile_rows; i++)

  1430.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1431. 

  1432.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1433.         if (i > pps->col_bd[j])

  1434.             j++;

  1435.         pps->col_idxX[i] = j;

  1436.     }

  1437. 

  1438.     /**

  1439.      * 6.5

  1440.      */

  1441.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1442. 

  1443.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1444.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1445.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1446.     pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));

  1447.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1448.         !pps->tile_id || !pps->min_tb_addr_zs_tab) {

  1449.         ret = AVERROR(ENOMEM);

  1450.         goto err;

  1451.     }

  1452. 

  1453.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1454.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1455.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1456.         int tile_x = 0;

  1457.         int tile_y = 0;

  1458.         int val    = 0;

  1459. 

  1460.         for (i = 0; i < pps->num_tile_columns; i++) {

  1461.             if (tb_x < pps->col_bd[i + 1]) {

  1462.                 tile_x = i;

  1463.                 break;

  1464.             }

  1465.         }

  1466. 

  1467.         for (i = 0; i < pps->num_tile_rows; i++) {

  1468.             if (tb_y < pps->row_bd[i + 1]) {

  1469.                 tile_y = i;

  1470.                 break;

  1471.             }

  1472.         }

  1473. 

  1474.         for (i = 0; i < tile_x; i++)

  1475.             val += pps->row_height[tile_y] * pps->column_width[i];

  1476.         for (i = 0; i < tile_y; i++)

  1477.             val += sps->ctb_width * pps->row_height[i];

  1478. 

  1479.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1480.                tb_x - pps->col_bd[tile_x];

  1481. 

  1482.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1483.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1484.     }

  1485. 

  1486.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1487.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1488.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1489.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1490.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1491. 

  1492.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1493.     if (!pps->tile_pos_rs) {

  1494.         ret = AVERROR(ENOMEM);

  1495.         goto err;

  1496.     }

  1497. 

  1498.     for (j = 0; j < pps->num_tile_rows; j++)

  1499.         for (i = 0; i < pps->num_tile_columns; i++)

  1500.             pps->tile_pos_rs[j * pps->num_tile_columns + i] = pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1501. 

  1502.     log2_diff_ctb_min_tb_size = sps->log2_ctb_size - sps->log2_min_tb_size;

  1503.     pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];

  1504.     for (y = 0; y < sps->tb_mask+2; y++) {

  1505.         pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;

  1506.         pps->min_tb_addr_zs_tab[y]    = -1;

  1507.     }

  1508.     for (y = 0; y < sps->tb_mask+1; y++) {

  1509.         for (x = 0; x < sps->tb_mask+1; x++) {

  1510.             int tb_x        = x >> log2_diff_ctb_min_tb_size;

  1511.             int tb_y        = y >> log2_diff_ctb_min_tb_size;

  1512.             int ctb_addr_rs = sps->ctb_width * tb_y + tb_x;

  1513.             int val         = pps->ctb_addr_rs_to_ts[ctb_addr_rs] <<

  1514.                               (log2_diff_ctb_min_tb_size * 2);

  1515.             for (i = 0; i < log2_diff_ctb_min_tb_size; i++) {

  1516.                 int m = 1 << i;

  1517.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1518.             }

  1519.             pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;

  1520.         }

  1521.     }

  1522. 

  1523.     if (get_bits_left(gb) < 0) {

  1524.         av_log(s->avctx, AV_LOG_ERROR,

  1525.                "Overread PPS by %d bits\n", -get_bits_left(gb));

  1526.         goto err;

  1527.     }

  1528. 

  1529.     av_buffer_unref(&s->pps_list[pps_id]);

  1530.     s->pps_list[pps_id] = pps_buf;

  1531. 

  1532.     return 0;

  1533. 

  1534. err:

  1535.     av_buffer_unref(&pps_buf);

  1536.     return ret;

  1537. }