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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. static void remove_pps(HEVCContext *s, int id)

  73. {

  74.     if (s->pps_list[id] && s->pps == (const HEVCPPS*)s->pps_list[id]->data)

  75.         s->pps = NULL;

  76.     av_buffer_unref(&s->pps_list[id]);

  77. }

  78. 

  79. static void remove_sps(HEVCContext *s, int id)

  80. {

  81.     int i;

  82.     if (s->sps_list[id]) {

  83.         if (s->sps == (const HEVCSPS*)s->sps_list[id]->data)

  84.             s->sps = NULL;

  85. 

  86.         /* drop all PPS that depend on this SPS */

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

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

  89.                 remove_pps(s, i);

  90. 

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

  92.             av_buffer_unref(&s->current_sps);

  93.             s->current_sps = av_buffer_ref(s->sps_list[id]);

  94.             if (!s->current_sps)

  95.                 s->sps = NULL;

  96.         }

  97.     }

  98.     av_buffer_unref(&s->sps_list[id]);

  99. }

  100. 

  101. static void remove_vps(HEVCContext *s, int id)

  102. {

  103.     int i;

  104.     if (s->vps_list[id]) {

  105.         if (s->vps == (const HEVCVPS*)s->vps_list[id]->data)

  106.             s->vps = NULL;

  107. 

  108.         for (i = 0; i < FF_ARRAY_ELEMS(s->sps_list); i++)

  109.             if (s->sps_list[i] && ((HEVCSPS*)s->sps_list[i]->data)->vps_id == id)

  110.                 remove_sps(s, i);

  111.     }

  112.     av_buffer_unref(&s->vps_list[id]);

  113. }

  114. 

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

  116.                                   const HEVCSPS *sps, int is_slice_header)

  117. {

  118.     HEVCLocalContext *lc = s->HEVClc;

  119.     uint8_t rps_predict = 0;

  120.     int delta_poc;

  121.     int k0 = 0;

  122.     int k1 = 0;

  123.     int k  = 0;

  124.     int i;

  125. 

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

  127. 

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

  129.         rps_predict = get_bits1(gb);

  130. 

  131.     if (rps_predict) {

  132.         const ShortTermRPS *rps_ridx;

  133.         int delta_rps;

  134.         unsigned abs_delta_rps;

  135.         uint8_t use_delta_flag = 0;

  136.         uint8_t delta_rps_sign;

  137. 

  138.         if (is_slice_header) {

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

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

  141.                 av_log(s->avctx, AV_LOG_ERROR,

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

  143.                        delta_idx, sps->nb_st_rps);

  144.                 return AVERROR_INVALIDDATA;

  145.             }

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

  147.         } else

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

  149. 

  150.         delta_rps_sign = get_bits1(gb);

  151.         abs_delta_rps  = get_ue_golomb_long(gb) + 1;

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

  153.             av_log(s->avctx, AV_LOG_ERROR,

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

  155.                    abs_delta_rps);

  156.             return AVERROR_INVALIDDATA;

  157.         }

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

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

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

  161. 

  162.             if (!used)

  163.                 use_delta_flag = get_bits1(gb);

  164. 

  165.             if (used || use_delta_flag) {

  166.                 if (i < rps_ridx->num_delta_pocs)

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

  168.                 else

  169.                     delta_poc = delta_rps;

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

  171.                 if (delta_poc < 0)

  172.                     k0++;

  173.                 else

  174.                     k1++;

  175.                 k++;

  176.             }

  177.         }

  178. 

  179.         rps->num_delta_pocs    = k;

  180.         rps->num_negative_pics = k0;

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

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

  183.             int used, tmp;

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

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

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

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

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

  189.                     if (delta_poc < tmp) {

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

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

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

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

  194.                     }

  195.                 }

  196.             }

  197.         }

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

  199.             int used;

  200.             k = rps->num_negative_pics - 1;

  201.             // flip the negative values to largest first

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

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

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

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

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

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

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

  209.                 k--;

  210.             }

  211.         }

  212.     } else {

  213.         unsigned int prev, nb_positive_pics;

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

  215.         nb_positive_pics       = get_ue_golomb_long(gb);

  216. 

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

  218.             nb_positive_pics >= MAX_REFS) {

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

  220.             return AVERROR_INVALIDDATA;

  221.         }

  222. 

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

  224.         if (rps->num_delta_pocs) {

  225.             prev = 0;

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

  227.                 delta_poc = get_ue_golomb_long(gb) + 1;

  228.                 prev -= delta_poc;

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

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

  231.             }

  232.             prev = 0;

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

  234.                 delta_poc = get_ue_golomb_long(gb) + 1;

  235.                 prev += delta_poc;

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

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

  238.             }

  239.         }

  240.     }

  241.     return 0;

  242. }

  243. 

  244. 

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

  246. {

  247.     int i;

  248.     HEVCLocalContext *lc = s->HEVClc;

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

  250. 

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

  252.         return -1;

  253. 

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

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

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

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

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

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

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

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

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

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

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

  265.     else

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

  267. 

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

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

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

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

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

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

  274. 

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

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

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

  278. 

  279.     return 0;

  280. }

  281. 

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

  283. {

  284.     int i;

  285.     HEVCLocalContext *lc = s->HEVClc;

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

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

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

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

  290.         return -1;

  291.     }

  292. 

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

  294. 

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

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

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

  298.     }

  299. 

  300.     if (max_num_sub_layers - 1> 0)

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

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

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

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

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

  306.             av_log(s->avctx, AV_LOG_ERROR,

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

  308.             return -1;

  309.         }

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

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

  312.                 av_log(s->avctx, AV_LOG_ERROR,

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

  314.                 return -1;

  315.             } else

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

  317.         }

  318.     }

  319. 

  320.     return 0;

  321. }

  322. 

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

  324.                                 int subpic_params_present)

  325. {

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

  327.     int i;

  328. 

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

  330.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  331.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  332. 

  333.         if (subpic_params_present) {

  334.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  335.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  336.         }

  337.         skip_bits1(gb); // cbr_flag

  338.     }

  339. }

  340. 

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

  342.                        int max_sublayers)

  343. {

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

  345.     int nal_params_present = 0, vcl_params_present = 0;

  346.     int subpic_params_present = 0;

  347.     int i;

  348. 

  349.     if (common_inf_present) {

  350.         nal_params_present = get_bits1(gb);

  351.         vcl_params_present = get_bits1(gb);

  352. 

  353.         if (nal_params_present || vcl_params_present) {

  354.             subpic_params_present = get_bits1(gb);

  355. 

  356.             if (subpic_params_present) {

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

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

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

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

  361.             }

  362. 

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

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

  365. 

  366.             if (subpic_params_present)

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

  368. 

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

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

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

  372.         }

  373.     }

  374. 

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

  376.         int low_delay = 0;

  377.         unsigned int nb_cpb = 1;

  378.         int fixed_rate = get_bits1(gb);

  379. 

  380.         if (!fixed_rate)

  381.             fixed_rate = get_bits1(gb);

  382. 

  383.         if (fixed_rate)

  384.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  385.         else

  386.             low_delay = get_bits1(gb);

  387. 

  388.         if (!low_delay) {

  389.             nb_cpb = get_ue_golomb_long(gb) + 1;

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

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

  392.                 return AVERROR_INVALIDDATA;

  393.             }

  394.         }

  395. 

  396.         if (nal_params_present)

  397.             decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

  398.         if (vcl_params_present)

  399.             decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

  400.     }

  401.     return 0;

  402. }

  403. 

  404. int ff_hevc_decode_nal_vps(HEVCContext *s)

  405. {

  406.     int i,j;

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

  408.     int vps_id = 0;

  409.     HEVCVPS *vps;

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

  411. 

  412.     if (!vps_buf)

  413.         return AVERROR(ENOMEM);

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

  415. 

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

  417. 

  418.     vps_id = get_bits(gb, 4);

  419.     if (vps_id >= MAX_VPS_COUNT) {

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

  421.         goto err;

  422.     }

  423. 

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

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

  426.         goto err;

  427.     }

  428. 

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

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

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

  432. 

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

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

  435.         goto err;

  436.     }

  437. 

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

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

  440.                vps->vps_max_sub_layers);

  441.         goto err;

  442.     }

  443. 

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

  445.         goto err;

  446. 

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

  448. 

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

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

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

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

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

  454. 

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

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

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

  458.             goto err;

  459.         }

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

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

  462.                    vps->vps_num_reorder_pics[i]);

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

  464.                 goto err;

  465.         }

  466.     }

  467. 

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

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

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

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

  472.         goto err;

  473.     }

  474. 

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

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

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

  478. 

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

  480.     if (vps->vps_timing_info_present_flag) {

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

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

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

  484.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  488.             int common_inf_present = 1;

  489. 

  490.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  491.             if (i)

  492.                 common_inf_present = get_bits1(gb);

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

  494.         }

  495.     }

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

  497. 

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

  499.         av_log(s->avctx, AV_LOG_ERROR,

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

  501.         goto err;

  502.     }

  503. 

  504.     if (s->vps_list[vps_id] &&

  505.         !memcmp(s->vps_list[vps_id]->data, vps_buf->data, vps_buf->size)) {

  506.         av_buffer_unref(&vps_buf);

  507.     } else {

  508.         remove_vps(s, vps_id);

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

  510.     }

  511. 

  512.     return 0;

  513. 

  514. err:

  515.     av_buffer_unref(&vps_buf);

  516.     return AVERROR_INVALIDDATA;

  517. }

  518. 

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

  520. {

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

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

  523.     GetBitContext backup;

  524.     int sar_present, alt = 0;

  525. 

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

  527. 

  528.     sar_present = get_bits1(gb);

  529.     if (sar_present) {

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

  531.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  533.         else if (sar_idx == 255) {

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

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

  536.         } else

  537.             av_log(s->avctx, AV_LOG_WARNING,

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

  539.     }

  540. 

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

  542.     if (vui->overscan_info_present_flag)

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

  544. 

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

  546.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  551.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  552.         if (vui->colour_description_present_flag) {

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

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

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

  556. 

  557.             // Set invalid values to "unspecified"

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

  559.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  561.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  563.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

  564.         }

  565.     }

  566. 

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

  568.     if (vui->chroma_loc_info_present_flag) {

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

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

  571.     }

  572. 

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

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

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

  576. 

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

  578.         vui->default_display_window_flag = 0;

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

  580.     } else

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

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

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

  584. 

  585.     if (vui->default_display_window_flag) {

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

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

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

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

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

  591. 

  592.         if (s->apply_defdispwin &&

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

  594.             av_log(s->avctx, AV_LOG_DEBUG,

  595.                    "discarding vui default display window, "

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

  597.                    vui->def_disp_win.left_offset,

  598.                    vui->def_disp_win.right_offset,

  599.                    vui->def_disp_win.top_offset,

  600.                    vui->def_disp_win.bottom_offset);

  601. 

  602.             vui->def_disp_win.left_offset   =

  603.             vui->def_disp_win.right_offset  =

  604.             vui->def_disp_win.top_offset    =

  605.             vui->def_disp_win.bottom_offset = 0;

  606.         }

  607.     }

  608. 

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

  610. 

  611.     if (vui->vui_timing_info_present_flag) {

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

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

  614.             // at where def_disp_win is normally located

  615.             av_log(s->avctx, AV_LOG_WARNING,

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

  617.             vui->default_display_window_flag = 0;

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

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

  620.             alt = 1;

  621.         }

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

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

  624.         if (alt) {

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

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

  627.         }

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

  629.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  632.         if (vui->vui_hrd_parameters_present_flag)

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

  634.     }

  635. 

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

  637.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  646.     }

  647. }

  648. 

  649. static void set_default_scaling_list_data(ScalingList *sl)

  650. {

  651.     int matrixId;

  652. 

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

  654.         // 4x4 default is 16

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

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

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

  658.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  677. }

  678. 

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

  680. {

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

  682.     uint8_t scaling_list_pred_mode_flag;

  683.     int32_t scaling_list_dc_coef[2][6];

  684.     int size_id, matrix_id, pos;

  685.     int i;

  686. 

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

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

  689.             scaling_list_pred_mode_flag = get_bits1(gb);

  690.             if (!scaling_list_pred_mode_flag) {

  691.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  694.                 if (delta) {

  695.                     // Copy from previous array.

  696.                     if (matrix_id < delta) {

  697.                         av_log(s->avctx, AV_LOG_ERROR,

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

  699.                         return AVERROR_INVALIDDATA;

  700.                     }

  701. 

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

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

  704.                            size_id > 0 ? 64 : 16);

  705.                     if (size_id > 1)

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

  707.                 }

  708.             } else {

  709.                 int next_coef, coef_num;

  710.                 int32_t scaling_list_delta_coef;

  711. 

  712.                 next_coef = 8;

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

  714.                 if (size_id > 1) {

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

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

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

  718.                 }

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

  720.                     if (size_id == 0)

  721.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  722.                                   ff_hevc_diag_scan4x4_x[i];

  723.                     else

  724.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  725.                                   ff_hevc_diag_scan8x8_x[i];

  726. 

  727.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  730.                 }

  731.             }

  732.         }

  733. 

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

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

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

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

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

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

  740.         }

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

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

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

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

  745.     }

  746. 

  747. 

  748.     return 0;

  749. }

  750. 

  751. int ff_hevc_decode_nal_sps(HEVCContext *s)

  752. {

  753.     const AVPixFmtDescriptor *desc;

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

  755.     int ret = 0;

  756.     unsigned int sps_id = 0;

  757.     int log2_diff_max_min_transform_block_size;

  758.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  759.     int i;

  760. 

  761.     HEVCSPS *sps;

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

  763. 

  764.     if (!sps_buf)

  765.         return AVERROR(ENOMEM);

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

  767. 

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

  769. 

  770.     // Coded parameters

  771. 

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

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

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

  775.         ret = AVERROR_INVALIDDATA;

  776.         goto err;

  777.     }

  778. 

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

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

  781.                sps->vps_id);

  782.         ret = AVERROR_INVALIDDATA;

  783.         goto err;

  784.     }

  785. 

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

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

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

  789.                sps->max_sub_layers);

  790.         ret = AVERROR_INVALIDDATA;

  791.         goto err;

  792.     }

  793. 

  794.     skip_bits1(gb); // temporal_id_nesting_flag

  795. 

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

  797.         goto err;

  798. 

  799.     sps_id = get_ue_golomb_long(gb);

  800.     if (sps_id >= MAX_SPS_COUNT) {

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

  802.         ret = AVERROR_INVALIDDATA;

  803.         goto err;

  804.     }

  805. 

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

  807. 

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

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

  810. 

  811.     if (sps->separate_colour_plane_flag)

  812.         sps->chroma_format_idc = 0;

  813. 

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

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

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

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

  818.         goto err;

  819. 

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

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

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

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

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

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

  826. 

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

  828.             av_log(s->avctx, AV_LOG_DEBUG,

  829.                    "discarding sps conformance window, "

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

  831.                    sps->pic_conf_win.left_offset,

  832.                    sps->pic_conf_win.right_offset,

  833.                    sps->pic_conf_win.top_offset,

  834.                    sps->pic_conf_win.bottom_offset);

  835. 

  836.             sps->pic_conf_win.left_offset   =

  837.             sps->pic_conf_win.right_offset  =

  838.             sps->pic_conf_win.top_offset    =

  839.             sps->pic_conf_win.bottom_offset = 0;

  840.         }

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

  842.     }

  843. 

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

  845.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

  846.     if (sps->chroma_format_idc && bit_depth_chroma != sps->bit_depth) {

  847.         av_log(s->avctx, AV_LOG_ERROR,

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

  849.                "this is unsupported.\n",

  850.                sps->bit_depth, bit_depth_chroma);

  851.         ret = AVERROR_INVALIDDATA;

  852.         goto err;

  853.     }

  854. 

  855.     switch (sps->bit_depth) {

  856.     case 8:

  857.         if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY8;

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

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

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

  861.        break;

  862.     case 9:

  863.         if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;

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

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

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

  867.         break;

  868.     case 10:

  869.         if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;

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

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

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

  873.         break;

  874.     case 12:

  875.         if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;

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

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

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

  879.         break;

  880.     default:

  881.         av_log(s->avctx, AV_LOG_ERROR,

  882.                "4:2:0, 4:2:2, 4:4:4 supports are currently specified for 8, 10 and 12 bits.\n");

  883.         ret = AVERROR_PATCHWELCOME;

  884.         goto err;

  885.     }

  886. 

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

  888.     if (!desc) {

  889.         ret = AVERROR(EINVAL);

  890.         goto err;

  891.     }

  892. 

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

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

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

  896. 

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

  898. 

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

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

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

  902.                sps->log2_max_poc_lsb - 4);

  903.         ret = AVERROR_INVALIDDATA;

  904.         goto err;

  905.     }

  906. 

  907.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  916.             ret = AVERROR_INVALIDDATA;

  917.             goto err;

  918.         }

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

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

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

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

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

  924.                 ret = AVERROR_INVALIDDATA;

  925.                 goto err;

  926.             }

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

  928.         }

  929.     }

  930. 

  931.     if (!sublayer_ordering_info) {

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

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

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

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

  936.         }

  937.     }

  938. 

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

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

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

  942.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  943.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  944.                                                sps->log2_min_tb_size;

  945. 

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

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

  948.         ret = AVERROR_INVALIDDATA;

  949.         goto err;

  950.     }

  951. 

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

  953.         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);

  954.         ret = AVERROR_INVALIDDATA;

  955.         goto err;

  956.     }

  957. 

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

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

  960.         ret = AVERROR_INVALIDDATA;

  961.         goto err;

  962.     }

  963. 

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

  965.         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);

  966.         ret = AVERROR_INVALIDDATA;

  967.         goto err;

  968.     }

  969. 

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

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

  972. 

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

  974.     if (sps->scaling_list_enable_flag) {

  975.         set_default_scaling_list_data(&sps->scaling_list);

  976. 

  977.         if (get_bits1(gb)) {

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

  979.             if (ret < 0)

  980.                 goto err;

  981.         }

  982.     }

  983. 

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

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

  986. 

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

  988.     if (sps->pcm_enabled_flag) {

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

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

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

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

  993.                                         get_ue_golomb_long(gb);

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

  995.             av_log(s->avctx, AV_LOG_ERROR,

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

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

  998.             ret = AVERROR_INVALIDDATA;

  999.             goto err;

  1000.         }

  1001. 

  1002.         sps->pcm.loop_filter_disable_flag = get_bits1(gb);

  1003.     }

  1004. 

  1005.     sps->nb_st_rps = get_ue_golomb_long(gb);

  1006.     if (sps->nb_st_rps > MAX_SHORT_TERM_RPS_COUNT) {

  1007.         av_log(s->avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",

  1008.                sps->nb_st_rps);

  1009.         ret = AVERROR_INVALIDDATA;

  1010.         goto err;

  1011.     }

  1012.     for (i = 0; i < sps->nb_st_rps; i++) {

  1013.         if ((ret = ff_hevc_decode_short_term_rps(s, &sps->st_rps[i],

  1014.                                                  sps, 0)) < 0)

  1015.             goto err;

  1016.     }

  1017. 

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

  1019.     if (sps->long_term_ref_pics_present_flag) {

  1020.         sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);

  1021.         if (sps->num_long_term_ref_pics_sps > 31U) {

  1022.             av_log(s->avctx, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",

  1023.                    sps->num_long_term_ref_pics_sps);

  1024.             goto err;

  1025.         }

  1026.         for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {

  1027.             sps->lt_ref_pic_poc_lsb_sps[i]       = get_bits(gb, sps->log2_max_poc_lsb);

  1028.             sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);

  1029.         }

  1030.     }

  1031. 

  1032.     sps->sps_temporal_mvp_enabled_flag          = get_bits1(gb);

  1033.     sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);

  1034.     sps->vui.sar = (AVRational){0, 1};

  1035.     vui_present = get_bits1(gb);

  1036.     if (vui_present)

  1037.         decode_vui(s, sps);

  1038. 

  1039.     if (get_bits1(gb)) { // sps_extension_flag

  1040.         int sps_extension_flag[1];

  1041.         for (i = 0; i < 1; i++)

  1042.             sps_extension_flag[i] = get_bits1(gb);

  1043.         skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);

  1044.         if (sps_extension_flag[0]) {

  1045.             int extended_precision_processing_flag;

  1046.             int high_precision_offsets_enabled_flag;

  1047.             int cabac_bypass_alignment_enabled_flag;

  1048. 

  1049.             sps->transform_skip_rotation_enabled_flag = get_bits1(gb);

  1050.             sps->transform_skip_context_enabled_flag  = get_bits1(gb);

  1051.             sps->implicit_rdpcm_enabled_flag = get_bits1(gb);

  1052. 

  1053.             sps->explicit_rdpcm_enabled_flag = get_bits1(gb);

  1054. 

  1055.             extended_precision_processing_flag = get_bits1(gb);

  1056.             if (extended_precision_processing_flag)

  1057.                 av_log(s->avctx, AV_LOG_WARNING,

  1058.                    "extended_precision_processing_flag not yet implemented\n");

  1059. 

  1060.             sps->intra_smoothing_disabled_flag       = get_bits1(gb);

  1061.             high_precision_offsets_enabled_flag  = get_bits1(gb);

  1062.             if (high_precision_offsets_enabled_flag)

  1063.                 av_log(s->avctx, AV_LOG_WARNING,

  1064.                    "high_precision_offsets_enabled_flag not yet implemented\n");

  1065. 

  1066.             sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);

  1067. 

  1068.             cabac_bypass_alignment_enabled_flag  = get_bits1(gb);

  1069.             if (cabac_bypass_alignment_enabled_flag)

  1070.                 av_log(s->avctx, AV_LOG_WARNING,

  1071.                    "cabac_bypass_alignment_enabled_flag not yet implemented\n");

  1072.         }

  1073.     }

  1074.     if (s->apply_defdispwin) {

  1075.         sps->output_window.left_offset   += sps->vui.def_disp_win.left_offset;

  1076.         sps->output_window.right_offset  += sps->vui.def_disp_win.right_offset;

  1077.         sps->output_window.top_offset    += sps->vui.def_disp_win.top_offset;

  1078.         sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

  1079.     }

  1080.     if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) &&

  1081.         !(s->avctx->flags & CODEC_FLAG_UNALIGNED)) {

  1082.         sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));

  1083.         av_log(s->avctx, AV_LOG_WARNING, "Reducing left output window to %d "

  1084.                "chroma samples to preserve alignment.\n",

  1085.                sps->output_window.left_offset);

  1086.     }

  1087.     sps->output_width  = sps->width -

  1088.                          (sps->output_window.left_offset + sps->output_window.right_offset);

  1089.     sps->output_height = sps->height -

  1090.                          (sps->output_window.top_offset + sps->output_window.bottom_offset);

  1091.     if (sps->width  <= sps->output_window.left_offset + (int64_t)sps->output_window.right_offset  ||

  1092.         sps->height <= sps->output_window.top_offset  + (int64_t)sps->output_window.bottom_offset) {

  1093.         av_log(s->avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",

  1094.                sps->output_width, sps->output_height);

  1095.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  1096.             ret = AVERROR_INVALIDDATA;

  1097.             goto err;

  1098.         }

  1099.         av_log(s->avctx, AV_LOG_WARNING,

  1100.                "Displaying the whole video surface.\n");

  1101.         memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));

  1102.         memset(&sps->output_window, 0, sizeof(sps->output_window));

  1103.         sps->output_width               = sps->width;

  1104.         sps->output_height              = sps->height;

  1105.     }

  1106. 

  1107.     // Inferred parameters

  1108.     sps->log2_ctb_size = sps->log2_min_cb_size +

  1109.                          sps->log2_diff_max_min_coding_block_size;

  1110.     sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

  1111. 

  1112.     sps->ctb_width  = (sps->width  + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1113.     sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1114.     sps->ctb_size   = sps->ctb_width * sps->ctb_height;

  1115. 

  1116.     sps->min_cb_width  = sps->width  >> sps->log2_min_cb_size;

  1117.     sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

  1118.     sps->min_tb_width  = sps->width  >> sps->log2_min_tb_size;

  1119.     sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

  1120.     sps->min_pu_width  = sps->width  >> sps->log2_min_pu_size;

  1121.     sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

  1122.     sps->tb_mask       = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;

  1123. 

  1124.     sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

  1125. 

  1126.     if (sps->width  & ((1 << sps->log2_min_cb_size) - 1) ||

  1127.         sps->height & ((1 << sps->log2_min_cb_size) - 1)) {

  1128.         av_log(s->avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  1129.         goto err;

  1130.     }

  1131. 

  1132.     if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {

  1133.         av_log(s->avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);

  1134.         goto err;

  1135.     }

  1136.     if (sps->log2_ctb_size < 4) {

  1137.         av_log(s->avctx,

  1138.                AV_LOG_ERROR,

  1139.                "log2_ctb_size %d differs from the bounds of any known profile\n",

  1140.                sps->log2_ctb_size);

  1141.         avpriv_request_sample(s->avctx, "log2_ctb_size %d", sps->log2_ctb_size);

  1142.         goto err;

  1143.     }

  1144.     if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1145.         av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

  1146.                sps->max_transform_hierarchy_depth_inter);

  1147.         goto err;

  1148.     }

  1149.     if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1150.         av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  1151.                sps->max_transform_hierarchy_depth_intra);

  1152.         goto err;

  1153.     }

  1154.     if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

  1155.         av_log(s->avctx, AV_LOG_ERROR,

  1156.                "max transform block size out of range: %d\n",

  1157.                sps->log2_max_trafo_size);

  1158.         goto err;

  1159.     }

  1160. 

  1161.     if (get_bits_left(gb) < 0) {

  1162.         av_log(s->avctx, AV_LOG_ERROR,

  1163.                "Overread SPS by %d bits\n", -get_bits_left(gb));

  1164.         goto err;

  1165.     }

  1166. 

  1167.     if (s->avctx->debug & FF_DEBUG_BITSTREAM) {

  1168.         av_log(s->avctx, AV_LOG_DEBUG,

  1169.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1170.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1171.                sps_id, sps->width, sps->height,

  1172.                sps->output_width, sps->output_height,

  1173.                av_get_pix_fmt_name(sps->pix_fmt));

  1174.     }

  1175. 

  1176.     /* check if this is a repeat of an already parsed SPS, then keep the

  1177.      * original one.

  1178.      * otherwise drop all PPSes that depend on it */

  1179.     if (s->sps_list[sps_id] &&

  1180.         !memcmp(s->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1181.         av_buffer_unref(&sps_buf);

  1182.     } else {

  1183.         remove_sps(s, sps_id);

  1184.         s->sps_list[sps_id] = sps_buf;

  1185.     }

  1186. 

  1187.     return 0;

  1188. 

  1189. err:

  1190.     av_buffer_unref(&sps_buf);

  1191.     return ret;

  1192. }

  1193. 

  1194. static void hevc_pps_free(void *opaque, uint8_t *data)

  1195. {

  1196.     HEVCPPS *pps = (HEVCPPS*)data;

  1197. 

  1198.     av_freep(&pps->column_width);

  1199.     av_freep(&pps->row_height);

  1200.     av_freep(&pps->col_bd);

  1201.     av_freep(&pps->row_bd);

  1202.     av_freep(&pps->col_idxX);

  1203.     av_freep(&pps->ctb_addr_rs_to_ts);

  1204.     av_freep(&pps->ctb_addr_ts_to_rs);

  1205.     av_freep(&pps->tile_pos_rs);

  1206.     av_freep(&pps->tile_id);

  1207.     av_freep(&pps->min_tb_addr_zs_tab);

  1208. 

  1209.     av_freep(&pps);

  1210. }

  1211. 

  1212. static int pps_range_extensions(HEVCContext *s, HEVCPPS *pps, HEVCSPS *sps) {

  1213.     GetBitContext *gb = &s->HEVClc->gb;

  1214.     int i;

  1215. 

  1216.     if (pps->transform_skip_enabled_flag) {

  1217.         pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;

  1218.     }

  1219.     pps->cross_component_prediction_enabled_flag = get_bits1(gb);

  1220.     pps->chroma_qp_offset_list_enabled_flag = get_bits1(gb);

  1221.     if (pps->chroma_qp_offset_list_enabled_flag) {

  1222.         pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);

  1223.         pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);

  1224.         if (pps->chroma_qp_offset_list_len_minus1 && pps->chroma_qp_offset_list_len_minus1 >= 5) {

  1225.             av_log(s->avctx, AV_LOG_ERROR,

  1226.                    "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");

  1227.             return AVERROR_INVALIDDATA;

  1228.         }

  1229.         for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {

  1230.             pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);

  1231.             if (pps->cb_qp_offset_list[i]) {

  1232.                 av_log(s->avctx, AV_LOG_WARNING,

  1233.                        "cb_qp_offset_list not tested yet.\n");

  1234.             }

  1235.             pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);

  1236.             if (pps->cr_qp_offset_list[i]) {

  1237.                 av_log(s->avctx, AV_LOG_WARNING,

  1238.                        "cb_qp_offset_list not tested yet.\n");

  1239.             }

  1240.         }

  1241.     }

  1242.     pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);

  1243.     pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);

  1244. 

  1245.     return(0);

  1246. }

  1247. 

  1248. int ff_hevc_decode_nal_pps(HEVCContext *s)

  1249. {

  1250.     GetBitContext *gb = &s->HEVClc->gb;

  1251.     HEVCSPS      *sps = NULL;

  1252.     int pic_area_in_ctbs;

  1253.     int log2_diff_ctb_min_tb_size;

  1254.     int i, j, x, y, ctb_addr_rs, tile_id;

  1255.     int ret = 0;

  1256.     unsigned int pps_id = 0;

  1257. 

  1258.     AVBufferRef *pps_buf;

  1259.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1260. 

  1261.     if (!pps)

  1262.         return AVERROR(ENOMEM);

  1263. 

  1264.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1265.                                hevc_pps_free, NULL, 0);

  1266.     if (!pps_buf) {

  1267.         av_freep(&pps);

  1268.         return AVERROR(ENOMEM);

  1269.     }

  1270. 

  1271.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1272. 

  1273.     // Default values

  1274.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1275.     pps->num_tile_columns                      = 1;

  1276.     pps->num_tile_rows                         = 1;

  1277.     pps->uniform_spacing_flag                  = 1;

  1278.     pps->disable_dbf                           = 0;

  1279.     pps->beta_offset                           = 0;

  1280.     pps->tc_offset                             = 0;

  1281.     pps->log2_max_transform_skip_block_size    = 2;

  1282. 

  1283.     // Coded parameters

  1284.     pps_id = get_ue_golomb_long(gb);

  1285.     if (pps_id >= MAX_PPS_COUNT) {

  1286.         av_log(s->avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1287.         ret = AVERROR_INVALIDDATA;

  1288.         goto err;

  1289.     }

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

  1291.     if (pps->sps_id >= MAX_SPS_COUNT) {

  1292.         av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1293.         ret = AVERROR_INVALIDDATA;

  1294.         goto err;

  1295.     }

  1296.     if (!s->sps_list[pps->sps_id]) {

  1297.         av_log(s->avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1298.         ret = AVERROR_INVALIDDATA;

  1299.         goto err;

  1300.     }

  1301.     sps = (HEVCSPS *)s->sps_list[pps->sps_id]->data;

  1302. 

  1303.     pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

  1304.     pps->output_flag_present_flag              = get_bits1(gb);

  1305.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1306. 

  1307.     pps->sign_data_hiding_flag = get_bits1(gb);

  1308. 

  1309.     pps->cabac_init_present_flag = get_bits1(gb);

  1310. 

  1311.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1312.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1313. 

  1314.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1315. 

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

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

  1318. 

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

  1320.     pps->diff_cu_qp_delta_depth   = 0;

  1321.     if (pps->cu_qp_delta_enabled_flag)

  1322.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1323. 

  1324.     if (pps->diff_cu_qp_delta_depth < 0 ||

  1325.         pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {

  1326.         av_log(s->avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",

  1327.                pps->diff_cu_qp_delta_depth);

  1328.         ret = AVERROR_INVALIDDATA;

  1329.         goto err;

  1330.     }

  1331. 

  1332.     pps->cb_qp_offset = get_se_golomb(gb);

  1333.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1334.         av_log(s->avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1335.                pps->cb_qp_offset);

  1336.         ret = AVERROR_INVALIDDATA;

  1337.         goto err;

  1338.     }

  1339.     pps->cr_qp_offset = get_se_golomb(gb);

  1340.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1341.         av_log(s->avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1342.                pps->cr_qp_offset);

  1343.         ret = AVERROR_INVALIDDATA;

  1344.         goto err;

  1345.     }

  1346.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1347. 

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

  1349.     pps->weighted_bipred_flag = get_bits1(gb);

  1350. 

  1351.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1352.     pps->tiles_enabled_flag               = get_bits1(gb);

  1353.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1354. 

  1355.     if (pps->tiles_enabled_flag) {

  1356.         pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

  1357.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

  1358.         if (pps->num_tile_columns == 0 ||

  1359.             pps->num_tile_columns >= sps->width) {

  1360.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1361.                    pps->num_tile_columns - 1);

  1362.             ret = AVERROR_INVALIDDATA;

  1363.             goto err;

  1364.         }

  1365.         if (pps->num_tile_rows == 0 ||

  1366.             pps->num_tile_rows >= sps->height) {

  1367.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1368.                    pps->num_tile_rows - 1);

  1369.             ret = AVERROR_INVALIDDATA;

  1370.             goto err;

  1371.         }

  1372. 

  1373.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1374.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1375.         if (!pps->column_width || !pps->row_height) {

  1376.             ret = AVERROR(ENOMEM);

  1377.             goto err;

  1378.         }

  1379. 

  1380.         pps->uniform_spacing_flag = get_bits1(gb);

  1381.         if (!pps->uniform_spacing_flag) {

  1382.             uint64_t sum = 0;

  1383.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1384.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1385.                 sum                 += pps->column_width[i];

  1386.             }

  1387.             if (sum >= sps->ctb_width) {

  1388.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1389.                 ret = AVERROR_INVALIDDATA;

  1390.                 goto err;

  1391.             }

  1392.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1393. 

  1394.             sum = 0;

  1395.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1396.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1397.                 sum               += pps->row_height[i];

  1398.             }

  1399.             if (sum >= sps->ctb_height) {

  1400.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1401.                 ret = AVERROR_INVALIDDATA;

  1402.                 goto err;

  1403.             }

  1404.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1405.         }

  1406.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1407.     }

  1408. 

  1409.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1410. 

  1411.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1412.     if (pps->deblocking_filter_control_present_flag) {

  1413.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1414.         pps->disable_dbf                             = get_bits1(gb);

  1415.         if (!pps->disable_dbf) {

  1416.             pps->beta_offset = get_se_golomb(gb) * 2;

  1417.             pps->tc_offset = get_se_golomb(gb) * 2;

  1418.             if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

  1419.                 av_log(s->avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1420.                        pps->beta_offset/2);

  1421.                 ret = AVERROR_INVALIDDATA;

  1422.                 goto err;

  1423.             }

  1424.             if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

  1425.                 av_log(s->avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1426.                        pps->tc_offset/2);

  1427.                 ret = AVERROR_INVALIDDATA;

  1428.                 goto err;

  1429.             }

  1430.         }

  1431.     }

  1432. 

  1433.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1434.     if (pps->scaling_list_data_present_flag) {

  1435.         set_default_scaling_list_data(&pps->scaling_list);

  1436.         ret = scaling_list_data(s, &pps->scaling_list, sps);

  1437.         if (ret < 0)

  1438.             goto err;

  1439.     }

  1440.     pps->lists_modification_present_flag = get_bits1(gb);

  1441.     pps->log2_parallel_merge_level       = get_ue_golomb_long(gb) + 2;

  1442.     if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {

  1443.         av_log(s->avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1444.                pps->log2_parallel_merge_level - 2);

  1445.         ret = AVERROR_INVALIDDATA;

  1446.         goto err;

  1447.     }

  1448. 

  1449.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1450. 

  1451.     if (get_bits1(gb)) { // pps_extension_present_flag

  1452.         int pps_range_extensions_flag = get_bits1(gb);

  1453.         /* int pps_extension_7bits = */ get_bits(gb, 7);

  1454.         if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {

  1455.             if ((ret = pps_range_extensions(s, pps, sps)) < 0)

  1456.                 goto err;

  1457.         }

  1458.     }

  1459. 

  1460.     // Inferred parameters

  1461.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1462.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1463.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1464.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX) {

  1465.         ret = AVERROR(ENOMEM);

  1466.         goto err;

  1467.     }

  1468. 

  1469.     if (pps->uniform_spacing_flag) {

  1470.         if (!pps->column_width) {

  1471.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1472.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1473.         }

  1474.         if (!pps->column_width || !pps->row_height) {

  1475.             ret = AVERROR(ENOMEM);

  1476.             goto err;

  1477.         }

  1478. 

  1479.         for (i = 0; i < pps->num_tile_columns; i++) {

  1480.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1481.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1482.         }

  1483. 

  1484.         for (i = 0; i < pps->num_tile_rows; i++) {

  1485.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1486.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1487.         }

  1488.     }

  1489. 

  1490.     pps->col_bd[0] = 0;

  1491.     for (i = 0; i < pps->num_tile_columns; i++)

  1492.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1493. 

  1494.     pps->row_bd[0] = 0;

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

  1496.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1497. 

  1498.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1499.         if (i > pps->col_bd[j])

  1500.             j++;

  1501.         pps->col_idxX[i] = j;

  1502.     }

  1503. 

  1504.     /**

  1505.      * 6.5

  1506.      */

  1507.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1508. 

  1509.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1510.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1511.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1512.     pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));

  1513.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1514.         !pps->tile_id || !pps->min_tb_addr_zs_tab) {

  1515.         ret = AVERROR(ENOMEM);

  1516.         goto err;

  1517.     }

  1518. 

  1519.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1520.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1521.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1522.         int tile_x = 0;

  1523.         int tile_y = 0;

  1524.         int val    = 0;

  1525. 

  1526.         for (i = 0; i < pps->num_tile_columns; i++) {

  1527.             if (tb_x < pps->col_bd[i + 1]) {

  1528.                 tile_x = i;

  1529.                 break;

  1530.             }

  1531.         }

  1532. 

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

  1534.             if (tb_y < pps->row_bd[i + 1]) {

  1535.                 tile_y = i;

  1536.                 break;

  1537.             }

  1538.         }

  1539. 

  1540.         for (i = 0; i < tile_x; i++)

  1541.             val += pps->row_height[tile_y] * pps->column_width[i];

  1542.         for (i = 0; i < tile_y; i++)

  1543.             val += sps->ctb_width * pps->row_height[i];

  1544. 

  1545.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1546.                tb_x - pps->col_bd[tile_x];

  1547. 

  1548.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1549.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1550.     }

  1551. 

  1552.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1553.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1554.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1555.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1556.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1557. 

  1558.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1559.     if (!pps->tile_pos_rs) {

  1560.         ret = AVERROR(ENOMEM);

  1561.         goto err;

  1562.     }

  1563. 

  1564.     for (j = 0; j < pps->num_tile_rows; j++)

  1565.         for (i = 0; i < pps->num_tile_columns; i++)

  1566.             pps->tile_pos_rs[j * pps->num_tile_columns + i] = pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1567. 

  1568.     log2_diff_ctb_min_tb_size = sps->log2_ctb_size - sps->log2_min_tb_size;

  1569.     pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];

  1570.     for (y = 0; y < sps->tb_mask+2; y++) {

  1571.         pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;

  1572.         pps->min_tb_addr_zs_tab[y]    = -1;

  1573.     }

  1574.     for (y = 0; y < sps->tb_mask+1; y++) {

  1575.         for (x = 0; x < sps->tb_mask+1; x++) {

  1576.             int tb_x        = x >> log2_diff_ctb_min_tb_size;

  1577.             int tb_y        = y >> log2_diff_ctb_min_tb_size;

  1578.             int ctb_addr_rs = sps->ctb_width * tb_y + tb_x;

  1579.             int val         = pps->ctb_addr_rs_to_ts[ctb_addr_rs] <<

  1580.                               (log2_diff_ctb_min_tb_size * 2);

  1581.             for (i = 0; i < log2_diff_ctb_min_tb_size; i++) {

  1582.                 int m = 1 << i;

  1583.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1584.             }

  1585.             pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;

  1586.         }

  1587.     }

  1588. 

  1589.     if (get_bits_left(gb) < 0) {

  1590.         av_log(s->avctx, AV_LOG_ERROR,

  1591.                "Overread PPS by %d bits\n", -get_bits_left(gb));

  1592.         goto err;

  1593.     }

  1594. 

  1595.     remove_pps(s, pps_id);

  1596.     s->pps_list[pps_id] = pps_buf;

  1597. 

  1598.     return 0;

  1599. 

  1600. err:

  1601.     av_buffer_unref(&pps_buf);

  1602.     return ret;

  1603. }