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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.         if (k >= FF_ARRAY_ELEMS(rps->used)) {

  137.             av_log(s->avctx, AV_LOG_ERROR,

  138.                    "Invalid num_delta_pocs: %d\n", k);

  139.             return AVERROR_INVALIDDATA;

  140.         }

  141. 

  142.         rps->num_delta_pocs    = k;

  143.         rps->num_negative_pics = k0;

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

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

  146.             int used, tmp;

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

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

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

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

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

  152.                     if (delta_poc < tmp) {

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

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

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

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

  157.                     }

  158.                 }

  159.             }

  160.         }

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

  162.             int used;

  163.             k = rps->num_negative_pics - 1;

  164.             // flip the negative values to largest first

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

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

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

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

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

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

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

  172.                 k--;

  173.             }

  174.         }

  175.     } else {

  176.         unsigned int prev, nb_positive_pics;

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

  178.         nb_positive_pics       = get_ue_golomb_long(gb);

  179. 

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

  181.             nb_positive_pics >= MAX_REFS) {

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

  183.             return AVERROR_INVALIDDATA;

  184.         }

  185. 

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

  187.         if (rps->num_delta_pocs) {

  188.             prev = 0;

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

  190.                 delta_poc = get_ue_golomb_long(gb) + 1;

  191.                 prev -= delta_poc;

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

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

  194.             }

  195.             prev = 0;

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

  197.                 delta_poc = get_ue_golomb_long(gb) + 1;

  198.                 prev += delta_poc;

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

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

  201.             }

  202.         }

  203.     }

  204.     return 0;

  205. }

  206. 

  207. 

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

  209. {

  210.     int i;

  211.     HEVCLocalContext *lc = s->HEVClc;

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

  213. 

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

  215.         return -1;

  216. 

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

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

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

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

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

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

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

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

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

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

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

  228.     else

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

  230. 

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

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

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

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

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

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

  237. 

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

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

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

  241. 

  242.     return 0;

  243. }

  244. 

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

  246. {

  247.     int i;

  248.     HEVCLocalContext *lc = s->HEVClc;

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

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

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

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

  253.         return -1;

  254.     }

  255. 

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

  257. 

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

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

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

  261.     }

  262. 

  263.     if (max_num_sub_layers - 1> 0)

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

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

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

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

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

  269.             av_log(s->avctx, AV_LOG_ERROR,

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

  271.             return -1;

  272.         }

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

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

  275.                 av_log(s->avctx, AV_LOG_ERROR,

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

  277.                 return -1;

  278.             } else

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

  280.         }

  281.     }

  282. 

  283.     return 0;

  284. }

  285. 

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

  287.                                 int subpic_params_present)

  288. {

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

  290.     int i;

  291. 

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

  293.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  294.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  295. 

  296.         if (subpic_params_present) {

  297.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  298.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  299.         }

  300.         skip_bits1(gb); // cbr_flag

  301.     }

  302. }

  303. 

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

  305.                        int max_sublayers)

  306. {

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

  308.     int nal_params_present = 0, vcl_params_present = 0;

  309.     int subpic_params_present = 0;

  310.     int i;

  311. 

  312.     if (common_inf_present) {

  313.         nal_params_present = get_bits1(gb);

  314.         vcl_params_present = get_bits1(gb);

  315. 

  316.         if (nal_params_present || vcl_params_present) {

  317.             subpic_params_present = get_bits1(gb);

  318. 

  319.             if (subpic_params_present) {

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

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

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

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

  324.             }

  325. 

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

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

  328. 

  329.             if (subpic_params_present)

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

  331. 

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

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

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

  335.         }

  336.     }

  337. 

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

  339.         int low_delay = 0;

  340.         unsigned int nb_cpb = 1;

  341.         int fixed_rate = get_bits1(gb);

  342. 

  343.         if (!fixed_rate)

  344.             fixed_rate = get_bits1(gb);

  345. 

  346.         if (fixed_rate)

  347.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  348.         else

  349.             low_delay = get_bits1(gb);

  350. 

  351.         if (!low_delay) {

  352.             nb_cpb = get_ue_golomb_long(gb) + 1;

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

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

  355.                 return AVERROR_INVALIDDATA;

  356.             }

  357.         }

  358. 

  359.         if (nal_params_present)

  360.             decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

  361.         if (vcl_params_present)

  362.             decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

  363.     }

  364.     return 0;

  365. }

  366. 

  367. int ff_hevc_decode_nal_vps(HEVCContext *s)

  368. {

  369.     int i,j;

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

  371.     int vps_id = 0;

  372.     HEVCVPS *vps;

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

  374. 

  375.     if (!vps_buf)

  376.         return AVERROR(ENOMEM);

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

  378. 

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

  380. 

  381.     vps_id = get_bits(gb, 4);

  382.     if (vps_id >= MAX_VPS_COUNT) {

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

  384.         goto err;

  385.     }

  386. 

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

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

  389.         goto err;

  390.     }

  391. 

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

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

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

  395. 

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

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

  398.         goto err;

  399.     }

  400. 

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

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

  403.                vps->vps_max_sub_layers);

  404.         goto err;

  405.     }

  406. 

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

  408.         goto err;

  409. 

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

  411. 

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

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

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

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

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

  417. 

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

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

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

  421.             goto err;

  422.         }

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

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

  425.                    vps->vps_num_reorder_pics[i]);

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

  427.                 goto err;

  428.         }

  429.     }

  430. 

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

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

  433.     if (vps->vps_num_layer_sets < 1 || vps->vps_num_layer_sets > 1024 ||

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

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

  436.         goto err;

  437.     }

  438. 

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

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

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

  442. 

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

  444.     if (vps->vps_timing_info_present_flag) {

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

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

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

  448.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

  451.         if (vps->vps_num_hrd_parameters > (unsigned)vps->vps_num_layer_sets) {

  452.             av_log(s->avctx, AV_LOG_ERROR,

  453.                    "vps_num_hrd_parameters %d is invalid\n", vps->vps_num_hrd_parameters);

  454.             goto err;

  455.         }

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

  457.             int common_inf_present = 1;

  458. 

  459.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  460.             if (i)

  461.                 common_inf_present = get_bits1(gb);

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

  463.         }

  464.     }

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

  466. 

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

  468.         av_log(s->avctx, AV_LOG_ERROR,

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

  470.         if (s->vps_list[vps_id])

  471.             goto err;

  472.     }

  473. 

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

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

  476.     return 0;

  477. 

  478. err:

  479.     av_buffer_unref(&vps_buf);

  480.     return AVERROR_INVALIDDATA;

  481. }

  482. 

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

  484. {

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

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

  487.     GetBitContext backup;

  488.     int sar_present, alt = 0;

  489. 

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

  491. 

  492.     sar_present = get_bits1(gb);

  493.     if (sar_present) {

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

  495.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  497.         else if (sar_idx == 255) {

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

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

  500.         } else

  501.             av_log(s->avctx, AV_LOG_WARNING,

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

  503.     }

  504. 

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

  506.     if (vui->overscan_info_present_flag)

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

  508. 

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

  510.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  515.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  516.         if (vui->colour_description_present_flag) {

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

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

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

  520. 

  521.             // Set invalid values to "unspecified"

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

  523.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  525.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  527.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

  528.         }

  529.     }

  530. 

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

  532.     if (vui->chroma_loc_info_present_flag) {

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

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

  535.     }

  536. 

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

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

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

  540. 

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

  542.         vui->default_display_window_flag = 0;

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

  544.     } else

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

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

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

  548. 

  549.     if (vui->default_display_window_flag) {

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

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

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

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

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

  555. 

  556.         if (s->apply_defdispwin &&

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

  558.             av_log(s->avctx, AV_LOG_DEBUG,

  559.                    "discarding vui default display window, "

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

  561.                    vui->def_disp_win.left_offset,

  562.                    vui->def_disp_win.right_offset,

  563.                    vui->def_disp_win.top_offset,

  564.                    vui->def_disp_win.bottom_offset);

  565. 

  566.             vui->def_disp_win.left_offset   =

  567.             vui->def_disp_win.right_offset  =

  568.             vui->def_disp_win.top_offset    =

  569.             vui->def_disp_win.bottom_offset = 0;

  570.         }

  571.     }

  572. 

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

  574. 

  575.     if (vui->vui_timing_info_present_flag) {

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

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

  578.             // at where def_disp_win is normally located

  579.             av_log(s->avctx, AV_LOG_WARNING,

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

  581.             vui->default_display_window_flag = 0;

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

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

  584.             alt = 1;

  585.         }

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

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

  588.         if (alt) {

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

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

  591.         }

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

  593.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  596.         if (vui->vui_hrd_parameters_present_flag)

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

  598.     }

  599. 

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

  601.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  610.     }

  611. }

  612. 

  613. static void set_default_scaling_list_data(ScalingList *sl)

  614. {

  615.     int matrixId;

  616. 

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

  618.         // 4x4 default is 16

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

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

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

  622.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  641. }

  642. 

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

  644. {

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

  646.     uint8_t scaling_list_pred_mode_flag;

  647.     int32_t scaling_list_dc_coef[2][6];

  648.     int size_id, matrix_id, pos;

  649.     int i;

  650. 

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

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

  653.             scaling_list_pred_mode_flag = get_bits1(gb);

  654.             if (!scaling_list_pred_mode_flag) {

  655.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  658.                 if (delta) {

  659.                     // Copy from previous array.

  660.                     if (matrix_id < delta) {

  661.                         av_log(s->avctx, AV_LOG_ERROR,

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

  663.                         return AVERROR_INVALIDDATA;

  664.                     }

  665. 

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

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

  668.                            size_id > 0 ? 64 : 16);

  669.                     if (size_id > 1)

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

  671.                 }

  672.             } else {

  673.                 int next_coef, coef_num;

  674.                 int32_t scaling_list_delta_coef;

  675. 

  676.                 next_coef = 8;

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

  678.                 if (size_id > 1) {

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

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

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

  682.                 }

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

  684.                     if (size_id == 0)

  685.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  686.                                   ff_hevc_diag_scan4x4_x[i];

  687.                     else

  688.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  689.                                   ff_hevc_diag_scan8x8_x[i];

  690. 

  691.                     scaling_list_delta_coef = get_se_golomb(gb);

  692.                     next_coef = (next_coef + 256U + scaling_list_delta_coef) % 256;

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

  694.                 }

  695.             }

  696.         }

  697. 

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

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

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

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

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

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

  704.         }

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

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

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

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

  709.     }

  710. 

  711. 

  712.     return 0;

  713. }

  714. 

  715. int ff_hevc_decode_nal_sps(HEVCContext *s)

  716. {

  717.     const AVPixFmtDescriptor *desc;

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

  719.     int ret = 0;

  720.     unsigned int sps_id = 0;

  721.     int log2_diff_max_min_transform_block_size;

  722.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  723.     int i;

  724. 

  725.     HEVCSPS *sps;

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

  727. 

  728.     if (!sps_buf)

  729.         return AVERROR(ENOMEM);

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

  731. 

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

  733. 

  734.     // Coded parameters

  735. 

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

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

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

  739.         ret = AVERROR_INVALIDDATA;

  740.         goto err;

  741.     }

  742. 

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

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

  745.                sps->vps_id);

  746.         ret = AVERROR_INVALIDDATA;

  747.         goto err;

  748.     }

  749. 

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

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

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

  753.                sps->max_sub_layers);

  754.         ret = AVERROR_INVALIDDATA;

  755.         goto err;

  756.     }

  757. 

  758.     skip_bits1(gb); // temporal_id_nesting_flag

  759. 

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

  761.         goto err;

  762. 

  763.     sps_id = get_ue_golomb_long(gb);

  764.     if (sps_id >= MAX_SPS_COUNT) {

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

  766.         ret = AVERROR_INVALIDDATA;

  767.         goto err;

  768.     }

  769. 

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

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

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

  773.         ret = AVERROR_PATCHWELCOME;

  774.         goto err;

  775.     }

  776. 

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

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

  779. 

  780.     if (sps->separate_colour_plane_flag)

  781.         sps->chroma_format_idc = 0;

  782. 

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

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

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

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

  787.         goto err;

  788. 

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

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

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

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

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

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

  795. 

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

  797.             av_log(s->avctx, AV_LOG_DEBUG,

  798.                    "discarding sps conformance window, "

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

  800.                    sps->pic_conf_win.left_offset,

  801.                    sps->pic_conf_win.right_offset,

  802.                    sps->pic_conf_win.top_offset,

  803.                    sps->pic_conf_win.bottom_offset);

  804. 

  805.             sps->pic_conf_win.left_offset   =

  806.             sps->pic_conf_win.right_offset  =

  807.             sps->pic_conf_win.top_offset    =

  808.             sps->pic_conf_win.bottom_offset = 0;

  809.         }

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

  811.     }

  812. 

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

  814.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  816.         av_log(s->avctx, AV_LOG_ERROR,

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

  818.                "this is unsupported.\n",

  819.                sps->bit_depth, bit_depth_chroma);

  820.         ret = AVERROR_INVALIDDATA;

  821.         goto err;

  822.     }

  823. 

  824.     switch (sps->bit_depth) {

  825.     case 8:

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

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

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

  829.        break;

  830.     case 9:

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

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

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

  834.         break;

  835.     case 10:

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

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

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

  839.         break;

  840.     case 12:

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

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

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

  844.         break;

  845.     default:

  846.         av_log(s->avctx, AV_LOG_ERROR,

  847.                "4:2:0, 4:2:2, 4:4:4 supports are currently specified for 8, 10 and 12 bits.\n");

  848.         ret = AVERROR_PATCHWELCOME;

  849.         goto err;

  850.     }

  851. 

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

  853.     if (!desc) {

  854.         ret = AVERROR(EINVAL);

  855.         goto err;

  856.     }

  857. 

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

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

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

  861. 

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

  863. 

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

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

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

  867.                sps->log2_max_poc_lsb - 4);

  868.         ret = AVERROR_INVALIDDATA;

  869.         goto err;

  870.     }

  871. 

  872.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  881.             ret = AVERROR_INVALIDDATA;

  882.             goto err;

  883.         }

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

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

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

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

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

  889.                 ret = AVERROR_INVALIDDATA;

  890.                 goto err;

  891.             }

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

  893.         }

  894.     }

  895. 

  896.     if (!sublayer_ordering_info) {

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

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

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

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

  901.         }

  902.     }

  903. 

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

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

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

  907.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  908.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  909.                                                sps->log2_min_tb_size;

  910. 

  911.     if (sps->log2_min_cb_size < 3 || sps->log2_min_cb_size > 30) {

  912.         av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_min_cb_size", sps->log2_min_cb_size);

  913.         ret = AVERROR_INVALIDDATA;

  914.         goto err;

  915.     }

  916. 

  917.     if (sps->log2_diff_max_min_coding_block_size > 30) {

  918.         av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_coding_block_size", sps->log2_diff_max_min_coding_block_size);

  919.         ret = AVERROR_INVALIDDATA;

  920.         goto err;

  921.     }

  922. 

  923.     if (sps->log2_min_tb_size >= sps->log2_min_cb_size || sps->log2_min_tb_size < 2) {

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

  925.         ret = AVERROR_INVALIDDATA;

  926.         goto err;

  927.     }

  928. 

  929.     if (log2_diff_max_min_transform_block_size < 0 || log2_diff_max_min_transform_block_size > 30) {

  930.         av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_transform_block_size", log2_diff_max_min_transform_block_size);

  931.         ret = AVERROR_INVALIDDATA;

  932.         goto err;

  933.     }

  934. 

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

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

  937. 

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

  939.     if (sps->scaling_list_enable_flag) {

  940.         set_default_scaling_list_data(&sps->scaling_list);

  941. 

  942.         if (get_bits1(gb)) {

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

  944.             if (ret < 0)

  945.                 goto err;

  946.         }

  947.     }

  948. 

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

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

  951. 

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

  953.     if (sps->pcm_enabled_flag) {

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

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

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

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

  958.                                         get_ue_golomb_long(gb);

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

  960.             av_log(s->avctx, AV_LOG_ERROR,

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

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

  963.             ret = AVERROR_INVALIDDATA;

  964.             goto err;

  965.         }

  966. 

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

  968.     }

  969. 

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

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

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

  973.                sps->nb_st_rps);

  974.         ret = AVERROR_INVALIDDATA;

  975.         goto err;

  976.     }

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

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

  979.                                                  sps, 0)) < 0)

  980.             goto err;

  981.     }

  982. 

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

  984.     if (sps->long_term_ref_pics_present_flag) {

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

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

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

  988.                    sps->num_long_term_ref_pics_sps);

  989.             goto err;

  990.         }

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

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

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

  994.         }

  995.     }

  996. 

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

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

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

  1000.     vui_present = get_bits1(gb);

  1001.     if (vui_present)

  1002.         decode_vui(s, sps);

  1003. 

  1004.     if (get_bits1(gb)) { // sps_extension_flag

  1005.         int sps_extension_flag[1];

  1006.         for (i = 0; i < 1; i++)

  1007.             sps_extension_flag[i] = get_bits1(gb);

  1008.         skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);

  1009.         if (sps_extension_flag[0]) {

  1010.             int extended_precision_processing_flag;

  1011.             int high_precision_offsets_enabled_flag;

  1012.             int cabac_bypass_alignment_enabled_flag;

  1013. 

  1014.             sps->transform_skip_rotation_enabled_flag = get_bits1(gb);

  1015.             sps->transform_skip_context_enabled_flag  = get_bits1(gb);

  1016.             sps->implicit_rdpcm_enabled_flag = get_bits1(gb);

  1017. 

  1018.             sps->explicit_rdpcm_enabled_flag = get_bits1(gb);

  1019. 

  1020.             extended_precision_processing_flag = get_bits1(gb);

  1021.             if (extended_precision_processing_flag)

  1022.                 av_log(s->avctx, AV_LOG_WARNING,

  1023.                    "extended_precision_processing_flag not yet implemented\n");

  1024. 

  1025.             sps->intra_smoothing_disabled_flag       = get_bits1(gb);

  1026.             high_precision_offsets_enabled_flag  = get_bits1(gb);

  1027.             if (high_precision_offsets_enabled_flag)

  1028.                 av_log(s->avctx, AV_LOG_WARNING,

  1029.                    "high_precision_offsets_enabled_flag not yet implemented\n");

  1030. 

  1031.             sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);

  1032. 

  1033.             cabac_bypass_alignment_enabled_flag  = get_bits1(gb);

  1034.             if (cabac_bypass_alignment_enabled_flag)

  1035.                 av_log(s->avctx, AV_LOG_WARNING,

  1036.                    "cabac_bypass_alignment_enabled_flag not yet implemented\n");

  1037.         }

  1038.     }

  1039.     if (s->apply_defdispwin) {

  1040.         sps->output_window.left_offset   += sps->vui.def_disp_win.left_offset;

  1041.         sps->output_window.right_offset  += sps->vui.def_disp_win.right_offset;

  1042.         sps->output_window.top_offset    += sps->vui.def_disp_win.top_offset;

  1043.         sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

  1044.     }

  1045.     if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) &&

  1046.         !(s->avctx->flags & CODEC_FLAG_UNALIGNED)) {

  1047.         sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));

  1048.         av_log(s->avctx, AV_LOG_WARNING, "Reducing left output window to %d "

  1049.                "chroma samples to preserve alignment.\n",

  1050.                sps->output_window.left_offset);

  1051.     }

  1052.     sps->output_width  = sps->width -

  1053.                          (sps->output_window.left_offset + sps->output_window.right_offset);

  1054.     sps->output_height = sps->height -

  1055.                          (sps->output_window.top_offset + sps->output_window.bottom_offset);

  1056.     if (sps->width  <= sps->output_window.left_offset + (int64_t)sps->output_window.right_offset  ||

  1057.         sps->height <= sps->output_window.top_offset  + (int64_t)sps->output_window.bottom_offset) {

  1058.         av_log(s->avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",

  1059.                sps->output_width, sps->output_height);

  1060.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  1061.             ret = AVERROR_INVALIDDATA;

  1062.             goto err;

  1063.         }

  1064.         av_log(s->avctx, AV_LOG_WARNING,

  1065.                "Displaying the whole video surface.\n");

  1066.         memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));

  1067.         memset(&sps->output_window, 0, sizeof(sps->output_window));

  1068.         sps->output_width               = sps->width;

  1069.         sps->output_height              = sps->height;

  1070.     }

  1071. 

  1072.     // Inferred parameters

  1073.     sps->log2_ctb_size = sps->log2_min_cb_size +

  1074.                          sps->log2_diff_max_min_coding_block_size;

  1075.     sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

  1076. 

  1077.     sps->ctb_width  = (sps->width  + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1078.     sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1079.     sps->ctb_size   = sps->ctb_width * sps->ctb_height;

  1080. 

  1081.     sps->min_cb_width  = sps->width  >> sps->log2_min_cb_size;

  1082.     sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

  1083.     sps->min_tb_width  = sps->width  >> sps->log2_min_tb_size;

  1084.     sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

  1085.     sps->min_pu_width  = sps->width  >> sps->log2_min_pu_size;

  1086.     sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

  1087.     sps->tb_mask       = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;

  1088. 

  1089.     sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

  1090. 

  1091.     if (sps->width  & ((1 << sps->log2_min_cb_size) - 1) ||

  1092.         sps->height & ((1 << sps->log2_min_cb_size) - 1)) {

  1093.         av_log(s->avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  1094.         goto err;

  1095.     }

  1096. 

  1097.     if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {

  1098.         av_log(s->avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);

  1099.         goto err;

  1100.     }

  1101.     if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1102.         av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

  1103.                sps->max_transform_hierarchy_depth_inter);

  1104.         goto err;

  1105.     }

  1106.     if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1107.         av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  1108.                sps->max_transform_hierarchy_depth_intra);

  1109.         goto err;

  1110.     }

  1111.     if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

  1112.         av_log(s->avctx, AV_LOG_ERROR,

  1113.                "max transform block size out of range: %d\n",

  1114.                sps->log2_max_trafo_size);

  1115.         goto err;

  1116.     }

  1117. 

  1118.     if (get_bits_left(gb) < 0) {

  1119.         av_log(s->avctx, AV_LOG_ERROR,

  1120.                "Overread SPS by %d bits\n", -get_bits_left(gb));

  1121.         goto err;

  1122.     }

  1123. 

  1124.     if (s->avctx->debug & FF_DEBUG_BITSTREAM) {

  1125.         av_log(s->avctx, AV_LOG_DEBUG,

  1126.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1127.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1128.                sps_id, sps->width, sps->height,

  1129.                sps->output_width, sps->output_height,

  1130.                av_get_pix_fmt_name(sps->pix_fmt));

  1131.     }

  1132. 

  1133.     /* check if this is a repeat of an already parsed SPS, then keep the

  1134.      * original one.

  1135.      * otherwise drop all PPSes that depend on it */

  1136.     if (s->sps_list[sps_id] &&

  1137.         !memcmp(s->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1138.         av_buffer_unref(&sps_buf);

  1139.     } else {

  1140.         for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++) {

  1141.             if (s->pps_list[i] && ((HEVCPPS*)s->pps_list[i]->data)->sps_id == sps_id)

  1142.                 av_buffer_unref(&s->pps_list[i]);

  1143.         }

  1144.         if (s->sps_list[sps_id] && s->sps == (HEVCSPS*)s->sps_list[sps_id]->data) {

  1145.             av_buffer_unref(&s->current_sps);

  1146.             s->current_sps = av_buffer_ref(s->sps_list[sps_id]);

  1147.             if (!s->current_sps)

  1148.                 s->sps = NULL;

  1149.         }

  1150.         av_buffer_unref(&s->sps_list[sps_id]);

  1151.         s->sps_list[sps_id] = sps_buf;

  1152.     }

  1153. 

  1154.     return 0;

  1155. 

  1156. err:

  1157.     av_buffer_unref(&sps_buf);

  1158.     return ret;

  1159. }

  1160. 

  1161. static void hevc_pps_free(void *opaque, uint8_t *data)

  1162. {

  1163.     HEVCPPS *pps = (HEVCPPS*)data;

  1164. 

  1165.     av_freep(&pps->column_width);

  1166.     av_freep(&pps->row_height);

  1167.     av_freep(&pps->col_bd);

  1168.     av_freep(&pps->row_bd);

  1169.     av_freep(&pps->col_idxX);

  1170.     av_freep(&pps->ctb_addr_rs_to_ts);

  1171.     av_freep(&pps->ctb_addr_ts_to_rs);

  1172.     av_freep(&pps->tile_pos_rs);

  1173.     av_freep(&pps->tile_id);

  1174.     av_freep(&pps->min_tb_addr_zs_tab);

  1175. 

  1176.     av_freep(&pps);

  1177. }

  1178. 

  1179. static int pps_range_extensions(HEVCContext *s, HEVCPPS *pps, HEVCSPS *sps) {

  1180.     GetBitContext *gb = &s->HEVClc->gb;

  1181.     int i;

  1182. 

  1183.     if (pps->transform_skip_enabled_flag) {

  1184.         pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;

  1185.     }

  1186.     pps->cross_component_prediction_enabled_flag = get_bits1(gb);

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

  1188.     if (pps->chroma_qp_offset_list_enabled_flag) {

  1189.         pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);

  1190.         pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);

  1191.         if (pps->chroma_qp_offset_list_len_minus1 && pps->chroma_qp_offset_list_len_minus1 >= 5) {

  1192.             av_log(s->avctx, AV_LOG_ERROR,

  1193.                    "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");

  1194.             return AVERROR_INVALIDDATA;

  1195.         }

  1196.         for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {

  1197.             pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);

  1198.             if (pps->cb_qp_offset_list[i]) {

  1199.                 av_log(s->avctx, AV_LOG_WARNING,

  1200.                        "cb_qp_offset_list not tested yet.\n");

  1201.             }

  1202.             pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);

  1203.             if (pps->cr_qp_offset_list[i]) {

  1204.                 av_log(s->avctx, AV_LOG_WARNING,

  1205.                        "cb_qp_offset_list not tested yet.\n");

  1206.             }

  1207.         }

  1208.     }

  1209.     pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);

  1210.     pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);

  1211. 

  1212.     return(0);

  1213. }

  1214. 

  1215. int ff_hevc_decode_nal_pps(HEVCContext *s)

  1216. {

  1217.     GetBitContext *gb = &s->HEVClc->gb;

  1218.     HEVCSPS      *sps = NULL;

  1219.     int pic_area_in_ctbs;

  1220.     int log2_diff_ctb_min_tb_size;

  1221.     int i, j, x, y, ctb_addr_rs, tile_id;

  1222.     int ret = 0;

  1223.     unsigned int pps_id = 0;

  1224.     unsigned log2_parallel_merge_level_minus2;

  1225. 

  1226.     AVBufferRef *pps_buf;

  1227.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1228. 

  1229.     if (!pps)

  1230.         return AVERROR(ENOMEM);

  1231. 

  1232.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1233.                                hevc_pps_free, NULL, 0);

  1234.     if (!pps_buf) {

  1235.         av_freep(&pps);

  1236.         return AVERROR(ENOMEM);

  1237.     }

  1238. 

  1239.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1240. 

  1241.     // Default values

  1242.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1243.     pps->num_tile_columns                      = 1;

  1244.     pps->num_tile_rows                         = 1;

  1245.     pps->uniform_spacing_flag                  = 1;

  1246.     pps->disable_dbf                           = 0;

  1247.     pps->beta_offset                           = 0;

  1248.     pps->tc_offset                             = 0;

  1249.     pps->log2_max_transform_skip_block_size    = 2;

  1250. 

  1251.     // Coded parameters

  1252.     pps_id = get_ue_golomb_long(gb);

  1253.     if (pps_id >= MAX_PPS_COUNT) {

  1254.         av_log(s->avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1255.         ret = AVERROR_INVALIDDATA;

  1256.         goto err;

  1257.     }

  1258.     pps->sps_id = get_ue_golomb_long(gb);

  1259.     if (pps->sps_id >= MAX_SPS_COUNT) {

  1260.         av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1261.         ret = AVERROR_INVALIDDATA;

  1262.         goto err;

  1263.     }

  1264.     if (!s->sps_list[pps->sps_id]) {

  1265.         av_log(s->avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1266.         ret = AVERROR_INVALIDDATA;

  1267.         goto err;

  1268.     }

  1269.     sps = (HEVCSPS *)s->sps_list[pps->sps_id]->data;

  1270. 

  1271.     pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

  1272.     pps->output_flag_present_flag              = get_bits1(gb);

  1273.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1274. 

  1275.     pps->sign_data_hiding_flag = get_bits1(gb);

  1276. 

  1277.     pps->cabac_init_present_flag = get_bits1(gb);

  1278. 

  1279.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1280.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1281. 

  1282.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1283. 

  1284.     pps->constrained_intra_pred_flag = get_bits1(gb);

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

  1286. 

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

  1288.     pps->diff_cu_qp_delta_depth   = 0;

  1289.     if (pps->cu_qp_delta_enabled_flag)

  1290.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1291. 

  1292.     if (pps->diff_cu_qp_delta_depth < 0 ||

  1293.         pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {

  1294.         av_log(s->avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",

  1295.                pps->diff_cu_qp_delta_depth);

  1296.         ret = AVERROR_INVALIDDATA;

  1297.         goto err;

  1298.     }

  1299. 

  1300.     pps->cb_qp_offset = get_se_golomb(gb);

  1301.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1302.         av_log(s->avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1303.                pps->cb_qp_offset);

  1304.         ret = AVERROR_INVALIDDATA;

  1305.         goto err;

  1306.     }

  1307.     pps->cr_qp_offset = get_se_golomb(gb);

  1308.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1309.         av_log(s->avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1310.                pps->cr_qp_offset);

  1311.         ret = AVERROR_INVALIDDATA;

  1312.         goto err;

  1313.     }

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

  1315. 

  1316.     pps->weighted_pred_flag   = get_bits1(gb);

  1317.     pps->weighted_bipred_flag = get_bits1(gb);

  1318. 

  1319.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1320.     pps->tiles_enabled_flag               = get_bits1(gb);

  1321.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1322. 

  1323.     if (pps->tiles_enabled_flag) {

  1324.         pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

  1325.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

  1326.         if (pps->num_tile_columns <= 0 ||

  1327.             pps->num_tile_columns >= sps->width) {

  1328.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1329.                    pps->num_tile_columns - 1);

  1330.             ret = AVERROR_INVALIDDATA;

  1331.             goto err;

  1332.         }

  1333.         if (pps->num_tile_rows <= 0 ||

  1334.             pps->num_tile_rows >= sps->height) {

  1335.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1336.                    pps->num_tile_rows - 1);

  1337.             ret = AVERROR_INVALIDDATA;

  1338.             goto err;

  1339.         }

  1340. 

  1341.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1342.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1343.         if (!pps->column_width || !pps->row_height) {

  1344.             ret = AVERROR(ENOMEM);

  1345.             goto err;

  1346.         }

  1347. 

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

  1349.         if (!pps->uniform_spacing_flag) {

  1350.             uint64_t sum = 0;

  1351.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1352.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1353.                 sum                 += pps->column_width[i];

  1354.             }

  1355.             if (sum >= sps->ctb_width) {

  1356.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1357.                 ret = AVERROR_INVALIDDATA;

  1358.                 goto err;

  1359.             }

  1360.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1361. 

  1362.             sum = 0;

  1363.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1364.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1365.                 sum               += pps->row_height[i];

  1366.             }

  1367.             if (sum >= sps->ctb_height) {

  1368.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1369.                 ret = AVERROR_INVALIDDATA;

  1370.                 goto err;

  1371.             }

  1372.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1373.         }

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

  1375.     }

  1376. 

  1377.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1378. 

  1379.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1380.     if (pps->deblocking_filter_control_present_flag) {

  1381.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1382.         pps->disable_dbf                             = get_bits1(gb);

  1383.         if (!pps->disable_dbf) {

  1384.             pps->beta_offset = get_se_golomb(gb) * 2;

  1385.             pps->tc_offset = get_se_golomb(gb) * 2;

  1386.             if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

  1387.                 av_log(s->avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1388.                        pps->beta_offset/2);

  1389.                 ret = AVERROR_INVALIDDATA;

  1390.                 goto err;

  1391.             }

  1392.             if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

  1393.                 av_log(s->avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1394.                        pps->tc_offset/2);

  1395.                 ret = AVERROR_INVALIDDATA;

  1396.                 goto err;

  1397.             }

  1398.         }

  1399.     }

  1400. 

  1401.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1402.     if (pps->scaling_list_data_present_flag) {

  1403.         set_default_scaling_list_data(&pps->scaling_list);

  1404.         ret = scaling_list_data(s, &pps->scaling_list, sps);

  1405.         if (ret < 0)

  1406.             goto err;

  1407.     }

  1408.     pps->lists_modification_present_flag = get_bits1(gb);

  1409.     log2_parallel_merge_level_minus2     = get_ue_golomb_long(gb);

  1410.     if (log2_parallel_merge_level_minus2 > sps->log2_ctb_size) {

  1411.         av_log(s->avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1412.                log2_parallel_merge_level_minus2);

  1413.         ret = AVERROR_INVALIDDATA;

  1414.         goto err;

  1415.     }

  1416.     pps->log2_parallel_merge_level       = log2_parallel_merge_level_minus2 + 2;

  1417. 

  1418.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1419. 

  1420.     if (get_bits1(gb)) { // pps_extension_present_flag

  1421.         int pps_range_extensions_flag = get_bits1(gb);

  1422.         /* int pps_extension_7bits = */ get_bits(gb, 7);

  1423.         if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {

  1424.             if ((ret = pps_range_extensions(s, pps, sps)) < 0)

  1425.                 goto err;

  1426.         }

  1427.     }

  1428. 

  1429.     // Inferred parameters

  1430.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1431.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1432.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1433.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX) {

  1434.         ret = AVERROR(ENOMEM);

  1435.         goto err;

  1436.     }

  1437. 

  1438.     if (pps->uniform_spacing_flag) {

  1439.         if (!pps->column_width) {

  1440.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1441.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1442.         }

  1443.         if (!pps->column_width || !pps->row_height) {

  1444.             ret = AVERROR(ENOMEM);

  1445.             goto err;

  1446.         }

  1447. 

  1448.         for (i = 0; i < pps->num_tile_columns; i++) {

  1449.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1450.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1451.         }

  1452. 

  1453.         for (i = 0; i < pps->num_tile_rows; i++) {

  1454.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1455.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1456.         }

  1457.     }

  1458. 

  1459.     pps->col_bd[0] = 0;

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

  1461.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1462. 

  1463.     pps->row_bd[0] = 0;

  1464.     for (i = 0; i < pps->num_tile_rows; i++)

  1465.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1466. 

  1467.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1468.         if (i > pps->col_bd[j])

  1469.             j++;

  1470.         pps->col_idxX[i] = j;

  1471.     }

  1472. 

  1473.     /**

  1474.      * 6.5

  1475.      */

  1476.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1477. 

  1478.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1479.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1480.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1481.     pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));

  1482.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1483.         !pps->tile_id || !pps->min_tb_addr_zs_tab) {

  1484.         ret = AVERROR(ENOMEM);

  1485.         goto err;

  1486.     }

  1487. 

  1488.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1489.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1490.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1491.         int tile_x = 0;

  1492.         int tile_y = 0;

  1493.         int val    = 0;

  1494. 

  1495.         for (i = 0; i < pps->num_tile_columns; i++) {

  1496.             if (tb_x < pps->col_bd[i + 1]) {

  1497.                 tile_x = i;

  1498.                 break;

  1499.             }

  1500.         }

  1501. 

  1502.         for (i = 0; i < pps->num_tile_rows; i++) {

  1503.             if (tb_y < pps->row_bd[i + 1]) {

  1504.                 tile_y = i;

  1505.                 break;

  1506.             }

  1507.         }

  1508. 

  1509.         for (i = 0; i < tile_x; i++)

  1510.             val += pps->row_height[tile_y] * pps->column_width[i];

  1511.         for (i = 0; i < tile_y; i++)

  1512.             val += sps->ctb_width * pps->row_height[i];

  1513. 

  1514.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1515.                tb_x - pps->col_bd[tile_x];

  1516. 

  1517.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1518.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1519.     }

  1520. 

  1521.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1522.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1523.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1524.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1525.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1526. 

  1527.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1528.     if (!pps->tile_pos_rs) {

  1529.         ret = AVERROR(ENOMEM);

  1530.         goto err;

  1531.     }

  1532. 

  1533.     for (j = 0; j < pps->num_tile_rows; j++)

  1534.         for (i = 0; i < pps->num_tile_columns; i++)

  1535.             pps->tile_pos_rs[j * pps->num_tile_columns + i] = pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1536. 

  1537.     log2_diff_ctb_min_tb_size = sps->log2_ctb_size - sps->log2_min_tb_size;

  1538.     pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];

  1539.     for (y = 0; y < sps->tb_mask+2; y++) {

  1540.         pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;

  1541.         pps->min_tb_addr_zs_tab[y]    = -1;

  1542.     }

  1543.     for (y = 0; y < sps->tb_mask+1; y++) {

  1544.         for (x = 0; x < sps->tb_mask+1; x++) {

  1545.             int tb_x        = x >> log2_diff_ctb_min_tb_size;

  1546.             int tb_y        = y >> log2_diff_ctb_min_tb_size;

  1547.             int ctb_addr_rs = sps->ctb_width * tb_y + tb_x;

  1548.             int val         = pps->ctb_addr_rs_to_ts[ctb_addr_rs] <<

  1549.                               (log2_diff_ctb_min_tb_size * 2);

  1550.             for (i = 0; i < log2_diff_ctb_min_tb_size; i++) {

  1551.                 int m = 1 << i;

  1552.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1553.             }

  1554.             pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;

  1555.         }

  1556.     }

  1557. 

  1558.     if (get_bits_left(gb) < 0) {

  1559.         av_log(s->avctx, AV_LOG_ERROR,

  1560.                "Overread PPS by %d bits\n", -get_bits_left(gb));

  1561.         goto err;

  1562.     }

  1563. 

  1564.     av_buffer_unref(&s->pps_list[pps_id]);

  1565.     s->pps_list[pps_id] = pps_buf;

  1566. 

  1567.     return 0;

  1568. 

  1569. err:

  1570.     av_buffer_unref(&pps_buf);

  1571.     return ret;

  1572. }