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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(HEVCParamSets *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(HEVCParamSets *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.         av_assert0(!(s->sps_list[id] && s->sps == (HEVCSPS*)s->sps_list[id]->data));

  92.     }

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

  94. }

  95. 

  96. static void remove_vps(HEVCParamSets *s, int id)

  97. {

  98.     int i;

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

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

  101.             s->vps = NULL;

  102. 

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

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

  105.                 remove_sps(s, i);

  106.     }

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

  108. }

  109. 

  110. int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx,

  111.                                   ShortTermRPS *rps, const HEVCSPS *sps, int is_slice_header)

  112. {

  113.     uint8_t rps_predict = 0;

  114.     int delta_poc;

  115.     int k0 = 0;

  116.     int k1 = 0;

  117.     int k  = 0;

  118.     int i;

  119. 

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

  121.         rps_predict = get_bits1(gb);

  122. 

  123.     if (rps_predict) {

  124.         const ShortTermRPS *rps_ridx;

  125.         int delta_rps;

  126.         unsigned abs_delta_rps;

  127.         uint8_t use_delta_flag = 0;

  128.         uint8_t delta_rps_sign;

  129. 

  130.         if (is_slice_header) {

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

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

  133.                 av_log(avctx, AV_LOG_ERROR,

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

  135.                        delta_idx, sps->nb_st_rps);

  136.                 return AVERROR_INVALIDDATA;

  137.             }

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

  139.             rps->rps_idx_num_delta_pocs = rps_ridx->num_delta_pocs;

  140.         } else

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

  142. 

  143.         delta_rps_sign = get_bits1(gb);

  144.         abs_delta_rps  = get_ue_golomb_long(gb) + 1;

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

  146.             av_log(avctx, AV_LOG_ERROR,

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

  148.                    abs_delta_rps);

  149.             return AVERROR_INVALIDDATA;

  150.         }

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

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

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

  154. 

  155.             if (!used)

  156.                 use_delta_flag = get_bits1(gb);

  157. 

  158.             if (used || use_delta_flag) {

  159.                 if (i < rps_ridx->num_delta_pocs)

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

  161.                 else

  162.                     delta_poc = delta_rps;

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

  164.                 if (delta_poc < 0)

  165.                     k0++;

  166.                 else

  167.                     k1++;

  168.                 k++;

  169.             }

  170.         }

  171. 

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

  173.             av_log(avctx, AV_LOG_ERROR,

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

  175.             return AVERROR_INVALIDDATA;

  176.         }

  177. 

  178.         rps->num_delta_pocs    = k;

  179.         rps->num_negative_pics = k0;

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

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

  182.             int used, tmp;

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

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

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

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

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

  188.                     if (delta_poc < tmp) {

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

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

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

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

  193.                     }

  194.                 }

  195.             }

  196.         }

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

  198.             int used;

  199.             k = rps->num_negative_pics - 1;

  200.             // flip the negative values to largest first

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

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

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

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

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

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

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

  208.                 k--;

  209.             }

  210.         }

  211.     } else {

  212.         unsigned int prev, nb_positive_pics;

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

  214.         nb_positive_pics       = get_ue_golomb_long(gb);

  215. 

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

  217.             nb_positive_pics >= MAX_REFS) {

  218.             av_log(avctx, AV_LOG_ERROR, "Too many refs in a short term RPS.\n");

  219.             return AVERROR_INVALIDDATA;

  220.         }

  221. 

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

  223.         if (rps->num_delta_pocs) {

  224.             prev = 0;

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

  226.                 delta_poc = get_ue_golomb_long(gb) + 1;

  227.                 if (delta_poc < 1 || delta_poc > 32768) {

  228.                     av_log(avctx, AV_LOG_ERROR,

  229.                         "Invalid value of delta_poc: %d\n",

  230.                         delta_poc);

  231.                     return AVERROR_INVALIDDATA;

  232.                 }

  233.                 prev -= delta_poc;

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

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

  236.             }

  237.             prev = 0;

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

  239.                 delta_poc = get_ue_golomb_long(gb) + 1;

  240.                 if (delta_poc < 1 || delta_poc > 32768) {

  241.                     av_log(avctx, AV_LOG_ERROR,

  242.                         "Invalid value of delta_poc: %d\n",

  243.                         delta_poc);

  244.                     return AVERROR_INVALIDDATA;

  245.                 }

  246.                 prev += delta_poc;

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

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

  249.             }

  250.         }

  251.     }

  252.     return 0;

  253. }

  254. 

  255. 

  256. static int decode_profile_tier_level(GetBitContext *gb, AVCodecContext *avctx,

  257.                                       PTLCommon *ptl)

  258. {

  259.     int i;

  260. 

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

  262.         return -1;

  263. 

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

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

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

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

  268.         av_log(avctx, AV_LOG_DEBUG, "Main profile bitstream\n");

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

  270.         av_log(avctx, AV_LOG_DEBUG, "Main 10 profile bitstream\n");

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

  272.         av_log(avctx, AV_LOG_DEBUG, "Main Still Picture profile bitstream\n");

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

  274.         av_log(avctx, AV_LOG_DEBUG, "Range Extension profile bitstream\n");

  275.     else

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

  277. 

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

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

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

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

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

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

  284. 

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

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

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

  288. 

  289.     return 0;

  290. }

  291. 

  292. static int parse_ptl(GetBitContext *gb, AVCodecContext *avctx,

  293.                       PTL *ptl, int max_num_sub_layers)

  294. {

  295.     int i;

  296.     if (decode_profile_tier_level(gb, avctx, &ptl->general_ptl) < 0 ||

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

  298.         av_log(avctx, AV_LOG_ERROR, "PTL information too short\n");

  299.         return -1;

  300.     }

  301. 

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

  303. 

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

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

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

  307.     }

  308. 

  309.     if (max_num_sub_layers - 1> 0)

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

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

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

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

  314.             decode_profile_tier_level(gb, avctx, &ptl->sub_layer_ptl[i]) < 0) {

  315.             av_log(avctx, AV_LOG_ERROR,

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

  317.             return -1;

  318.         }

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

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

  321.                 av_log(avctx, AV_LOG_ERROR,

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

  323.                 return -1;

  324.             } else

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

  326.         }

  327.     }

  328. 

  329.     return 0;

  330. }

  331. 

  332. static void decode_sublayer_hrd(GetBitContext *gb, unsigned int nb_cpb,

  333.                                 int subpic_params_present)

  334. {

  335.     int i;

  336. 

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

  338.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  339.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  340. 

  341.         if (subpic_params_present) {

  342.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  343.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  344.         }

  345.         skip_bits1(gb); // cbr_flag

  346.     }

  347. }

  348. 

  349. static int decode_hrd(GetBitContext *gb, int common_inf_present,

  350.                        int max_sublayers)

  351. {

  352.     int nal_params_present = 0, vcl_params_present = 0;

  353.     int subpic_params_present = 0;

  354.     int i;

  355. 

  356.     if (common_inf_present) {

  357.         nal_params_present = get_bits1(gb);

  358.         vcl_params_present = get_bits1(gb);

  359. 

  360.         if (nal_params_present || vcl_params_present) {

  361.             subpic_params_present = get_bits1(gb);

  362. 

  363.             if (subpic_params_present) {

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

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

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

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

  368.             }

  369. 

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

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

  372. 

  373.             if (subpic_params_present)

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

  375. 

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

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

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

  379.         }

  380.     }

  381. 

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

  383.         int low_delay = 0;

  384.         unsigned int nb_cpb = 1;

  385.         int fixed_rate = get_bits1(gb);

  386. 

  387.         if (!fixed_rate)

  388.             fixed_rate = get_bits1(gb);

  389. 

  390.         if (fixed_rate)

  391.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  392.         else

  393.             low_delay = get_bits1(gb);

  394. 

  395.         if (!low_delay) {

  396.             nb_cpb = get_ue_golomb_long(gb) + 1;

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

  398.                 av_log(NULL, AV_LOG_ERROR, "nb_cpb %d invalid\n", nb_cpb);

  399.                 return AVERROR_INVALIDDATA;

  400.             }

  401.         }

  402. 

  403.         if (nal_params_present)

  404.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  405.         if (vcl_params_present)

  406.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  407.     }

  408.     return 0;

  409. }

  410. 

  411. int ff_hevc_decode_nal_vps(GetBitContext *gb, AVCodecContext *avctx,

  412.                            HEVCParamSets *ps)

  413. {

  414.     int i,j;

  415.     int vps_id = 0;

  416.     HEVCVPS *vps;

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

  418. 

  419.     if (!vps_buf)

  420.         return AVERROR(ENOMEM);

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

  422. 

  423.     av_log(avctx, AV_LOG_DEBUG, "Decoding VPS\n");

  424. 

  425.     vps_id = get_bits(gb, 4);

  426.     if (vps_id >= MAX_VPS_COUNT) {

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

  428.         goto err;

  429.     }

  430. 

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

  432.         av_log(avctx, AV_LOG_ERROR, "vps_reserved_three_2bits is not three\n");

  433.         goto err;

  434.     }

  435. 

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

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

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

  439. 

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

  441.         av_log(avctx, AV_LOG_ERROR, "vps_reserved_ffff_16bits is not 0xffff\n");

  442.         goto err;

  443.     }

  444. 

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

  446.         av_log(avctx, AV_LOG_ERROR, "vps_max_sub_layers out of range: %d\n",

  447.                vps->vps_max_sub_layers);

  448.         goto err;

  449.     }

  450. 

  451.     if (parse_ptl(gb, avctx, &vps->ptl, vps->vps_max_sub_layers) < 0)

  452.         goto err;

  453. 

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

  455. 

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

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

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

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

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

  461. 

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

  463.             av_log(avctx, AV_LOG_ERROR, "vps_max_dec_pic_buffering_minus1 out of range: %d\n",

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

  465.             goto err;

  466.         }

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

  468.             av_log(avctx, AV_LOG_WARNING, "vps_max_num_reorder_pics out of range: %d\n",

  469.                    vps->vps_num_reorder_pics[i]);

  470.             if (avctx->err_recognition & AV_EF_EXPLODE)

  471.                 goto err;

  472.         }

  473.     }

  474. 

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

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

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

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

  479.         av_log(avctx, AV_LOG_ERROR, "too many layer_id_included_flags\n");

  480.         goto err;

  481.     }

  482. 

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

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

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

  486. 

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

  488.     if (vps->vps_timing_info_present_flag) {

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

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

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

  492.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  496.             av_log(avctx, AV_LOG_ERROR,

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

  498.             goto err;

  499.         }

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

  501.             int common_inf_present = 1;

  502. 

  503.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  504.             if (i)

  505.                 common_inf_present = get_bits1(gb);

  506.             decode_hrd(gb, common_inf_present, vps->vps_max_sub_layers);

  507.         }

  508.     }

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

  510. 

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

  512.         av_log(avctx, AV_LOG_ERROR,

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

  514.         if (ps->vps_list[vps_id])

  515.             goto err;

  516.     }

  517. 

  518.     if (ps->vps_list[vps_id] &&

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

  520.         av_buffer_unref(&vps_buf);

  521.     } else {

  522.         remove_vps(ps, vps_id);

  523.         ps->vps_list[vps_id] = vps_buf;

  524.     }

  525. 

  526.     return 0;

  527. 

  528. err:

  529.     av_buffer_unref(&vps_buf);

  530.     return AVERROR_INVALIDDATA;

  531. }

  532. 

  533. static void decode_vui(GetBitContext *gb, AVCodecContext *avctx,

  534.                        int apply_defdispwin, HEVCSPS *sps)

  535. {

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

  537.     GetBitContext backup;

  538.     int sar_present, alt = 0;

  539. 

  540.     av_log(avctx, AV_LOG_DEBUG, "Decoding VUI\n");

  541. 

  542.     sar_present = get_bits1(gb);

  543.     if (sar_present) {

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

  545.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  547.         else if (sar_idx == 255) {

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

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

  550.         } else

  551.             av_log(avctx, AV_LOG_WARNING,

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

  553.     }

  554. 

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

  556.     if (vui->overscan_info_present_flag)

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

  558. 

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

  560.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  565.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  566.         if (vui->colour_description_present_flag) {

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

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

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

  570. 

  571.             // Set invalid values to "unspecified"

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

  573.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  575.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  577.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

  578.         }

  579.     }

  580. 

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

  582.     if (vui->chroma_loc_info_present_flag) {

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

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

  585.     }

  586. 

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

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

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

  590. 

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

  592.         vui->default_display_window_flag = 0;

  593.         av_log(avctx, AV_LOG_WARNING, "Invalid default display window\n");

  594.     } else

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

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

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

  598. 

  599.     if (vui->default_display_window_flag) {

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

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

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

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

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

  605. 

  606.         if (apply_defdispwin &&

  607.             avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {

  608.             av_log(avctx, AV_LOG_DEBUG,

  609.                    "discarding vui default display window, "

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

  611.                    vui->def_disp_win.left_offset,

  612.                    vui->def_disp_win.right_offset,

  613.                    vui->def_disp_win.top_offset,

  614.                    vui->def_disp_win.bottom_offset);

  615. 

  616.             vui->def_disp_win.left_offset   =

  617.             vui->def_disp_win.right_offset  =

  618.             vui->def_disp_win.top_offset    =

  619.             vui->def_disp_win.bottom_offset = 0;

  620.         }

  621.     }

  622. 

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

  624. 

  625.     if (vui->vui_timing_info_present_flag) {

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

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

  628.             // at where def_disp_win is normally located

  629.             av_log(avctx, AV_LOG_WARNING,

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

  631.             vui->default_display_window_flag = 0;

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

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

  634.             alt = 1;

  635.         }

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

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

  638.         if (alt) {

  639.             av_log(avctx, AV_LOG_INFO, "Retry got %i/%i fps\n",

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

  641.         }

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

  643.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  646.         if (vui->vui_hrd_parameters_present_flag)

  647.             decode_hrd(gb, 1, sps->max_sub_layers);

  648.     }

  649. 

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

  651.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  660.     }

  661. }

  662. 

  663. static void set_default_scaling_list_data(ScalingList *sl)

  664. {

  665.     int matrixId;

  666. 

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

  668.         // 4x4 default is 16

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

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

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

  672.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  691. }

  692. 

  693. static int scaling_list_data(GetBitContext *gb, AVCodecContext *avctx, ScalingList *sl, HEVCSPS *sps)

  694. {

  695.     uint8_t scaling_list_pred_mode_flag;

  696.     int32_t scaling_list_dc_coef[2][6];

  697.     int size_id, matrix_id, pos;

  698.     int i;

  699. 

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

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

  702.             scaling_list_pred_mode_flag = get_bits1(gb);

  703.             if (!scaling_list_pred_mode_flag) {

  704.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  707.                 if (delta) {

  708.                     // Copy from previous array.

  709.                     if (matrix_id < delta) {

  710.                         av_log(avctx, AV_LOG_ERROR,

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

  712.                         return AVERROR_INVALIDDATA;

  713.                     }

  714. 

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

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

  717.                            size_id > 0 ? 64 : 16);

  718.                     if (size_id > 1)

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

  720.                 }

  721.             } else {

  722.                 int next_coef, coef_num;

  723.                 int32_t scaling_list_delta_coef;

  724. 

  725.                 next_coef = 8;

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

  727.                 if (size_id > 1) {

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

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

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

  731.                 }

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

  733.                     if (size_id == 0)

  734.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  735.                                   ff_hevc_diag_scan4x4_x[i];

  736.                     else

  737.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  738.                                   ff_hevc_diag_scan8x8_x[i];

  739. 

  740.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  743.                 }

  744.             }

  745.         }

  746. 

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

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

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

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

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

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

  753.         }

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

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

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

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

  758.     }

  759. 

  760. 

  761.     return 0;

  762. }

  763. 

  764. static int map_pixel_format(AVCodecContext *avctx, HEVCSPS *sps)

  765. {

  766.     const AVPixFmtDescriptor *desc;

  767.     switch (sps->bit_depth) {

  768.     case 8:

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

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

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

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

  773.        break;

  774.     case 9:

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

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

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

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

  779.         break;

  780.     case 10:

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

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

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

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

  785.         break;

  786.     case 12:

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

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

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

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

  791.         break;

  792.     default:

  793.         av_log(avctx, AV_LOG_ERROR,

  794.                "4:2:0, 4:2:2, 4:4:4 supports are currently specified for 8, 10 and 12 bits.\n");

  795.         av_log(avctx, AV_LOG_ERROR,

  796.                "chroma_format_idc is %d, depth is %d",

  797.                sps->chroma_format_idc, sps->bit_depth);

  798.         return AVERROR_INVALIDDATA;

  799.     }

  800. 

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

  802.     if (!desc)

  803.         return AVERROR(EINVAL);

  804. 

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

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

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

  808. 

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

  810. 

  811.     return 0;

  812. }

  813. 

  814. int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,

  815.                       int apply_defdispwin, AVBufferRef **vps_list, AVCodecContext *avctx)

  816. {

  817.     int ret = 0;

  818.     int log2_diff_max_min_transform_block_size;

  819.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  820.     int i;

  821. 

  822.     // Coded parameters

  823. 

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

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

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

  827.         return AVERROR_INVALIDDATA;

  828.     }

  829. 

  830.     if (vps_list && !vps_list[sps->vps_id]) {

  831.         av_log(avctx, AV_LOG_ERROR, "VPS %d does not exist\n",

  832.                sps->vps_id);

  833.         return AVERROR_INVALIDDATA;

  834.     }

  835. 

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

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

  838.         av_log(avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n",

  839.                sps->max_sub_layers);

  840.         return AVERROR_INVALIDDATA;

  841.     }

  842. 

  843.     skip_bits1(gb); // temporal_id_nesting_flag

  844. 

  845.     if ((ret = parse_ptl(gb, avctx, &sps->ptl, sps->max_sub_layers)) < 0)

  846.         return ret;

  847. 

  848.     *sps_id = get_ue_golomb_long(gb);

  849.     if (*sps_id >= MAX_SPS_COUNT) {

  850.         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", *sps_id);

  851.         return AVERROR_INVALIDDATA;

  852.     }

  853. 

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

  855.     if (sps->chroma_format_idc > 3U) {

  856.         av_log(avctx, AV_LOG_ERROR, "chroma_format_idc %d is invalid\n", sps->chroma_format_idc);

  857.         return AVERROR_INVALIDDATA;

  858.     }

  859. 

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

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

  862. 

  863.     if (sps->separate_colour_plane_flag)

  864.         sps->chroma_format_idc = 0;

  865. 

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

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

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

  869.                                    sps->height, 0, avctx)) < 0)

  870.         return ret;

  871. 

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

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

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

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

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

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

  878. 

  879.         if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {

  880.             av_log(avctx, AV_LOG_DEBUG,

  881.                    "discarding sps conformance window, "

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

  883.                    sps->pic_conf_win.left_offset,

  884.                    sps->pic_conf_win.right_offset,

  885.                    sps->pic_conf_win.top_offset,

  886.                    sps->pic_conf_win.bottom_offset);

  887. 

  888.             sps->pic_conf_win.left_offset   =

  889.             sps->pic_conf_win.right_offset  =

  890.             sps->pic_conf_win.top_offset    =

  891.             sps->pic_conf_win.bottom_offset = 0;

  892.         }

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

  894.     }

  895. 

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

  897.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  899.         av_log(avctx, AV_LOG_ERROR,

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

  901.                "this is unsupported.\n",

  902.                sps->bit_depth, bit_depth_chroma);

  903.         return AVERROR_INVALIDDATA;

  904.     }

  905. 

  906.     ret = map_pixel_format(avctx, sps);

  907.     if (ret < 0)

  908.         return ret;

  909. 

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

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

  912.         av_log(avctx, AV_LOG_ERROR, "log2_max_pic_order_cnt_lsb_minus4 out range: %d\n",

  913.                sps->log2_max_poc_lsb - 4);

  914.         return AVERROR_INVALIDDATA;

  915.     }

  916. 

  917.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

  924.             av_log(avctx, AV_LOG_ERROR, "sps_max_dec_pic_buffering_minus1 out of range: %d\n",

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

  926.             return AVERROR_INVALIDDATA;

  927.         }

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

  929.             av_log(avctx, AV_LOG_WARNING, "sps_max_num_reorder_pics out of range: %d\n",

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

  931.             if (avctx->err_recognition & AV_EF_EXPLODE ||

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

  933.                 return AVERROR_INVALIDDATA;

  934.             }

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

  936.         }

  937.     }

  938. 

  939.     if (!sublayer_ordering_info) {

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

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

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

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

  944.         }

  945.     }

  946. 

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

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

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

  950.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  951.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  952.                                                sps->log2_min_tb_size;

  953. 

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

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

  956.         return AVERROR_INVALIDDATA;

  957.     }

  958. 

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

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

  961.         return AVERROR_INVALIDDATA;

  962.     }

  963. 

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

  965.         av_log(avctx, AV_LOG_ERROR, "Invalid value for log2_min_tb_size");

  966.         return AVERROR_INVALIDDATA;

  967.     }

  968. 

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

  970.         av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_transform_block_size", log2_diff_max_min_transform_block_size);

  971.         return AVERROR_INVALIDDATA;

  972.     }

  973. 

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

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

  976. 

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

  978.     if (sps->scaling_list_enable_flag) {

  979.         set_default_scaling_list_data(&sps->scaling_list);

  980. 

  981.         if (get_bits1(gb)) {

  982.             ret = scaling_list_data(gb, avctx, &sps->scaling_list, sps);

  983.             if (ret < 0)

  984.                 return ret;

  985.         }

  986.     }

  987. 

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

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

  990. 

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

  992.     if (sps->pcm_enabled_flag) {

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

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

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

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

  997.                                         get_ue_golomb_long(gb);

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

  999.             av_log(avctx, AV_LOG_ERROR,

  1000.                    "PCM bit depth (%d) is greater than normal bit depth (%d)\n",

  1001.                    sps->pcm.bit_depth, sps->bit_depth);

  1002.             return AVERROR_INVALIDDATA;

  1003.         }

  1004. 

  1005.         sps->pcm.loop_filter_disable_flag = get_bits1(gb);

  1006.     }

  1007. 

  1008.     sps->nb_st_rps = get_ue_golomb_long(gb);

  1009.     if (sps->nb_st_rps > MAX_SHORT_TERM_RPS_COUNT) {

  1010.         av_log(avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",

  1011.                sps->nb_st_rps);

  1012.         return AVERROR_INVALIDDATA;

  1013.     }

  1014.     for (i = 0; i < sps->nb_st_rps; i++) {

  1015.         if ((ret = ff_hevc_decode_short_term_rps(gb, avctx, &sps->st_rps[i],

  1016.                                                  sps, 0)) < 0)

  1017.             return ret;

  1018.     }

  1019. 

  1020.     sps->long_term_ref_pics_present_flag = get_bits1(gb);

  1021.     if (sps->long_term_ref_pics_present_flag) {

  1022.         sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);

  1023.         if (sps->num_long_term_ref_pics_sps > 31U) {

  1024.             av_log(avctx, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",

  1025.                    sps->num_long_term_ref_pics_sps);

  1026.             return AVERROR_INVALIDDATA;

  1027.         }

  1028.         for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {

  1029.             sps->lt_ref_pic_poc_lsb_sps[i]       = get_bits(gb, sps->log2_max_poc_lsb);

  1030.             sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);

  1031.         }

  1032.     }

  1033. 

  1034.     sps->sps_temporal_mvp_enabled_flag          = get_bits1(gb);

  1035.     sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);

  1036.     sps->vui.sar = (AVRational){0, 1};

  1037.     vui_present = get_bits1(gb);

  1038.     if (vui_present)

  1039.         decode_vui(gb, avctx, apply_defdispwin, sps);

  1040. 

  1041.     if (get_bits1(gb)) { // sps_extension_flag

  1042.         int sps_extension_flag[1];

  1043.         for (i = 0; i < 1; i++)

  1044.             sps_extension_flag[i] = get_bits1(gb);

  1045.         skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);

  1046.         if (sps_extension_flag[0]) {

  1047.             int extended_precision_processing_flag;

  1048.             int high_precision_offsets_enabled_flag;

  1049.             int cabac_bypass_alignment_enabled_flag;

  1050. 

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

  1052.             sps->transform_skip_context_enabled_flag  = get_bits1(gb);

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

  1054. 

  1055.             sps->explicit_rdpcm_enabled_flag = get_bits1(gb);

  1056. 

  1057.             extended_precision_processing_flag = get_bits1(gb);

  1058.             if (extended_precision_processing_flag)

  1059.                 av_log(avctx, AV_LOG_WARNING,

  1060.                    "extended_precision_processing_flag not yet implemented\n");

  1061. 

  1062.             sps->intra_smoothing_disabled_flag       = get_bits1(gb);

  1063.             high_precision_offsets_enabled_flag  = get_bits1(gb);

  1064.             if (high_precision_offsets_enabled_flag)

  1065.                 av_log(avctx, AV_LOG_WARNING,

  1066.                    "high_precision_offsets_enabled_flag not yet implemented\n");

  1067. 

  1068.             sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);

  1069. 

  1070.             cabac_bypass_alignment_enabled_flag  = get_bits1(gb);

  1071.             if (cabac_bypass_alignment_enabled_flag)

  1072.                 av_log(avctx, AV_LOG_WARNING,

  1073.                    "cabac_bypass_alignment_enabled_flag not yet implemented\n");

  1074.         }

  1075.     }

  1076.     if (apply_defdispwin) {

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

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

  1079.         sps->output_window.top_offset    += sps->vui.def_disp_win.top_offset;

  1080.         sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

  1081.     }

  1082.     if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) &&

  1083.         !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {

  1084.         sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));

  1085.         av_log(avctx, AV_LOG_WARNING, "Reducing left output window to %d "

  1086.                "chroma samples to preserve alignment.\n",

  1087.                sps->output_window.left_offset);

  1088.     }

  1089.     sps->output_width  = sps->width -

  1090.                          (sps->output_window.left_offset + sps->output_window.right_offset);

  1091.     sps->output_height = sps->height -

  1092.                          (sps->output_window.top_offset + sps->output_window.bottom_offset);

  1093.     if (sps->width  <= sps->output_window.left_offset + (int64_t)sps->output_window.right_offset  ||

  1094.         sps->height <= sps->output_window.top_offset  + (int64_t)sps->output_window.bottom_offset) {

  1095.         av_log(avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",

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

  1097.         if (avctx->err_recognition & AV_EF_EXPLODE) {

  1098.             return AVERROR_INVALIDDATA;

  1099.         }

  1100.         av_log(avctx, AV_LOG_WARNING,

  1101.                "Displaying the whole video surface.\n");

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

  1103.         memset(&sps->output_window, 0, sizeof(sps->output_window));

  1104.         sps->output_width               = sps->width;

  1105.         sps->output_height              = sps->height;

  1106.     }

  1107. 

  1108.     // Inferred parameters

  1109.     sps->log2_ctb_size = sps->log2_min_cb_size +

  1110.                          sps->log2_diff_max_min_coding_block_size;

  1111.     sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

  1112. 

  1113.     if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {

  1114.         av_log(avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);

  1115.         return AVERROR_INVALIDDATA;

  1116.     }

  1117.     if (sps->log2_ctb_size < 4) {

  1118.         av_log(avctx,

  1119.                AV_LOG_ERROR,

  1120.                "log2_ctb_size %d differs from the bounds of any known profile\n",

  1121.                sps->log2_ctb_size);

  1122.         avpriv_request_sample(avctx, "log2_ctb_size %d", sps->log2_ctb_size);

  1123.         return AVERROR_INVALIDDATA;

  1124.     }

  1125. 

  1126.     sps->ctb_width  = (sps->width  + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1127.     sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1128.     sps->ctb_size   = sps->ctb_width * sps->ctb_height;

  1129. 

  1130.     sps->min_cb_width  = sps->width  >> sps->log2_min_cb_size;

  1131.     sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

  1132.     sps->min_tb_width  = sps->width  >> sps->log2_min_tb_size;

  1133.     sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

  1134.     sps->min_pu_width  = sps->width  >> sps->log2_min_pu_size;

  1135.     sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

  1136.     sps->tb_mask       = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;

  1137. 

  1138.     sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

  1139. 

  1140.     if (av_mod_uintp2(sps->width, sps->log2_min_cb_size) ||

  1141.         av_mod_uintp2(sps->height, sps->log2_min_cb_size)) {

  1142.         av_log(avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  1143.         return AVERROR_INVALIDDATA;

  1144.     }

  1145. 

  1146.     if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1147.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

  1148.                sps->max_transform_hierarchy_depth_inter);

  1149.         return AVERROR_INVALIDDATA;

  1150.     }

  1151.     if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1152.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  1153.                sps->max_transform_hierarchy_depth_intra);

  1154.         return AVERROR_INVALIDDATA;

  1155.     }

  1156.     if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

  1157.         av_log(avctx, AV_LOG_ERROR,

  1158.                "max transform block size out of range: %d\n",

  1159.                sps->log2_max_trafo_size);

  1160.         return AVERROR_INVALIDDATA;

  1161.     }

  1162. 

  1163.     if (get_bits_left(gb) < 0) {

  1164.         av_log(avctx, AV_LOG_ERROR,

  1165.                "Overread SPS by %d bits\n", -get_bits_left(gb));

  1166.         return AVERROR_INVALIDDATA;

  1167.     }

  1168. 

  1169.     return 0;

  1170. }

  1171. 

  1172. int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,

  1173.                            HEVCParamSets *ps, int apply_defdispwin)

  1174. {

  1175.     HEVCSPS *sps;

  1176.     AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));

  1177.     unsigned int sps_id;

  1178.     int ret;

  1179. 

  1180.     if (!sps_buf)

  1181.         return AVERROR(ENOMEM);

  1182.     sps = (HEVCSPS*)sps_buf->data;

  1183. 

  1184.     av_log(avctx, AV_LOG_DEBUG, "Decoding SPS\n");

  1185. 

  1186.     ret = ff_hevc_parse_sps(sps, gb, &sps_id,

  1187.                             apply_defdispwin,

  1188.                             ps->vps_list, avctx);

  1189.     if (ret < 0) {

  1190.         av_buffer_unref(&sps_buf);

  1191.         return ret;

  1192.     }

  1193. 

  1194.     if (avctx->debug & FF_DEBUG_BITSTREAM) {

  1195.         av_log(avctx, AV_LOG_DEBUG,

  1196.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1197.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1198.                sps_id, sps->width, sps->height,

  1199.                sps->output_width, sps->output_height,

  1200.                av_get_pix_fmt_name(sps->pix_fmt));

  1201.     }

  1202. 

  1203.     /* check if this is a repeat of an already parsed SPS, then keep the

  1204.      * original one.

  1205.      * otherwise drop all PPSes that depend on it */

  1206.     if (ps->sps_list[sps_id] &&

  1207.         !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1208.         av_buffer_unref(&sps_buf);

  1209.     } else {

  1210.         remove_sps(ps, sps_id);

  1211.         ps->sps_list[sps_id] = sps_buf;

  1212.     }

  1213. 

  1214.     return 0;

  1215. }

  1216. 

  1217. static void hevc_pps_free(void *opaque, uint8_t *data)

  1218. {

  1219.     HEVCPPS *pps = (HEVCPPS*)data;

  1220. 

  1221.     av_freep(&pps->column_width);

  1222.     av_freep(&pps->row_height);

  1223.     av_freep(&pps->col_bd);

  1224.     av_freep(&pps->row_bd);

  1225.     av_freep(&pps->col_idxX);

  1226.     av_freep(&pps->ctb_addr_rs_to_ts);

  1227.     av_freep(&pps->ctb_addr_ts_to_rs);

  1228.     av_freep(&pps->tile_pos_rs);

  1229.     av_freep(&pps->tile_id);

  1230.     av_freep(&pps->min_tb_addr_zs_tab);

  1231. 

  1232.     av_freep(&pps);

  1233. }

  1234. 

  1235. static int pps_range_extensions(GetBitContext *gb, AVCodecContext *avctx,

  1236.                                 HEVCPPS *pps, HEVCSPS *sps) {

  1237.     int i;

  1238. 

  1239.     if (pps->transform_skip_enabled_flag) {

  1240.         pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;

  1241.     }

  1242.     pps->cross_component_prediction_enabled_flag = get_bits1(gb);

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

  1244.     if (pps->chroma_qp_offset_list_enabled_flag) {

  1245.         pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);

  1246.         pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);

  1247.         if (pps->chroma_qp_offset_list_len_minus1 && pps->chroma_qp_offset_list_len_minus1 >= 5) {

  1248.             av_log(avctx, AV_LOG_ERROR,

  1249.                    "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");

  1250.             return AVERROR_INVALIDDATA;

  1251.         }

  1252.         for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {

  1253.             pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);

  1254.             if (pps->cb_qp_offset_list[i]) {

  1255.                 av_log(avctx, AV_LOG_WARNING,

  1256.                        "cb_qp_offset_list not tested yet.\n");

  1257.             }

  1258.             pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);

  1259.             if (pps->cr_qp_offset_list[i]) {

  1260.                 av_log(avctx, AV_LOG_WARNING,

  1261.                        "cb_qp_offset_list not tested yet.\n");

  1262.             }

  1263.         }

  1264.     }

  1265.     pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);

  1266.     pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);

  1267. 

  1268.     return(0);

  1269. }

  1270. 

  1271. static inline int setup_pps(AVCodecContext *avctx, GetBitContext *gb,

  1272.                             HEVCPPS *pps, HEVCSPS *sps)

  1273. {

  1274.     int log2_diff;

  1275.     int pic_area_in_ctbs;

  1276.     int i, j, x, y, ctb_addr_rs, tile_id;

  1277. 

  1278.     // Inferred parameters

  1279.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1280.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1281.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1282.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX)

  1283.         return AVERROR(ENOMEM);

  1284. 

  1285.     if (pps->uniform_spacing_flag) {

  1286.         if (!pps->column_width) {

  1287.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1288.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1289.         }

  1290.         if (!pps->column_width || !pps->row_height)

  1291.             return AVERROR(ENOMEM);

  1292. 

  1293.         for (i = 0; i < pps->num_tile_columns; i++) {

  1294.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1295.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1296.         }

  1297. 

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

  1299.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1300.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1301.         }

  1302.     }

  1303. 

  1304.     pps->col_bd[0] = 0;

  1305.     for (i = 0; i < pps->num_tile_columns; i++)

  1306.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1307. 

  1308.     pps->row_bd[0] = 0;

  1309.     for (i = 0; i < pps->num_tile_rows; i++)

  1310.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1311. 

  1312.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1313.         if (i > pps->col_bd[j])

  1314.             j++;

  1315.         pps->col_idxX[i] = j;

  1316.     }

  1317. 

  1318.     /**

  1319.      * 6.5

  1320.      */

  1321.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1322. 

  1323.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1324.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1325.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1326.     pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));

  1327.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1328.         !pps->tile_id || !pps->min_tb_addr_zs_tab) {

  1329.         return AVERROR(ENOMEM);

  1330.     }

  1331. 

  1332.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1333.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1334.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1335.         int tile_x = 0;

  1336.         int tile_y = 0;

  1337.         int val    = 0;

  1338. 

  1339.         for (i = 0; i < pps->num_tile_columns; i++) {

  1340.             if (tb_x < pps->col_bd[i + 1]) {

  1341.                 tile_x = i;

  1342.                 break;

  1343.             }

  1344.         }

  1345. 

  1346.         for (i = 0; i < pps->num_tile_rows; i++) {

  1347.             if (tb_y < pps->row_bd[i + 1]) {

  1348.                 tile_y = i;

  1349.                 break;

  1350.             }

  1351.         }

  1352. 

  1353.         for (i = 0; i < tile_x; i++)

  1354.             val += pps->row_height[tile_y] * pps->column_width[i];

  1355.         for (i = 0; i < tile_y; i++)

  1356.             val += sps->ctb_width * pps->row_height[i];

  1357. 

  1358.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1359.                tb_x - pps->col_bd[tile_x];

  1360. 

  1361.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1362.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1363.     }

  1364. 

  1365.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1366.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1367.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1368.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1369.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1370. 

  1371.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1372.     if (!pps->tile_pos_rs)

  1373.         return AVERROR(ENOMEM);

  1374. 

  1375.     for (j = 0; j < pps->num_tile_rows; j++)

  1376.         for (i = 0; i < pps->num_tile_columns; i++)

  1377.             pps->tile_pos_rs[j * pps->num_tile_columns + i] =

  1378.                 pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1379. 

  1380.     log2_diff = sps->log2_ctb_size - sps->log2_min_tb_size;

  1381.     pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];

  1382.     for (y = 0; y < sps->tb_mask+2; y++) {

  1383.         pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;

  1384.         pps->min_tb_addr_zs_tab[y]    = -1;

  1385.     }

  1386.     for (y = 0; y < sps->tb_mask+1; y++) {

  1387.         for (x = 0; x < sps->tb_mask+1; x++) {

  1388.             int tb_x = x >> log2_diff;

  1389.             int tb_y = y >> log2_diff;

  1390.             int rs   = sps->ctb_width * tb_y + tb_x;

  1391.             int val  = pps->ctb_addr_rs_to_ts[rs] << (log2_diff * 2);

  1392.             for (i = 0; i < log2_diff; i++) {

  1393.                 int m = 1 << i;

  1394.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1395.             }

  1396.             pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;

  1397.         }

  1398.     }

  1399. 

  1400.     return 0;

  1401. }

  1402. 

  1403. int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,

  1404.                            HEVCParamSets *ps)

  1405. {

  1406.     HEVCSPS      *sps = NULL;

  1407.     int i, ret = 0;

  1408.     unsigned int pps_id = 0;

  1409.     unsigned log2_parallel_merge_level_minus2;

  1410. 

  1411.     AVBufferRef *pps_buf;

  1412.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1413. 

  1414.     if (!pps)

  1415.         return AVERROR(ENOMEM);

  1416. 

  1417.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1418.                                hevc_pps_free, NULL, 0);

  1419.     if (!pps_buf) {

  1420.         av_freep(&pps);

  1421.         return AVERROR(ENOMEM);

  1422.     }

  1423. 

  1424.     av_log(avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1425. 

  1426.     // Default values

  1427.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1428.     pps->num_tile_columns                      = 1;

  1429.     pps->num_tile_rows                         = 1;

  1430.     pps->uniform_spacing_flag                  = 1;

  1431.     pps->disable_dbf                           = 0;

  1432.     pps->beta_offset                           = 0;

  1433.     pps->tc_offset                             = 0;

  1434.     pps->log2_max_transform_skip_block_size    = 2;

  1435. 

  1436.     // Coded parameters

  1437.     pps_id = get_ue_golomb_long(gb);

  1438.     if (pps_id >= MAX_PPS_COUNT) {

  1439.         av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1440.         ret = AVERROR_INVALIDDATA;

  1441.         goto err;

  1442.     }

  1443.     pps->sps_id = get_ue_golomb_long(gb);

  1444.     if (pps->sps_id >= MAX_SPS_COUNT) {

  1445.         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1446.         ret = AVERROR_INVALIDDATA;

  1447.         goto err;

  1448.     }

  1449.     if (!ps->sps_list[pps->sps_id]) {

  1450.         av_log(avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1451.         ret = AVERROR_INVALIDDATA;

  1452.         goto err;

  1453.     }

  1454.     sps = (HEVCSPS *)ps->sps_list[pps->sps_id]->data;

  1455. 

  1456.     pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

  1457.     pps->output_flag_present_flag              = get_bits1(gb);

  1458.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1459. 

  1460.     pps->sign_data_hiding_flag = get_bits1(gb);

  1461. 

  1462.     pps->cabac_init_present_flag = get_bits1(gb);

  1463. 

  1464.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1465.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1466. 

  1467.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1468. 

  1469.     pps->constrained_intra_pred_flag = get_bits1(gb);

  1470.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1471. 

  1472.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1473.     pps->diff_cu_qp_delta_depth   = 0;

  1474.     if (pps->cu_qp_delta_enabled_flag)

  1475.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1476. 

  1477.     if (pps->diff_cu_qp_delta_depth < 0 ||

  1478.         pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {

  1479.         av_log(avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",

  1480.                pps->diff_cu_qp_delta_depth);

  1481.         ret = AVERROR_INVALIDDATA;

  1482.         goto err;

  1483.     }

  1484. 

  1485.     pps->cb_qp_offset = get_se_golomb(gb);

  1486.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1487.         av_log(avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1488.                pps->cb_qp_offset);

  1489.         ret = AVERROR_INVALIDDATA;

  1490.         goto err;

  1491.     }

  1492.     pps->cr_qp_offset = get_se_golomb(gb);

  1493.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1494.         av_log(avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1495.                pps->cr_qp_offset);

  1496.         ret = AVERROR_INVALIDDATA;

  1497.         goto err;

  1498.     }

  1499.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1500. 

  1501.     pps->weighted_pred_flag   = get_bits1(gb);

  1502.     pps->weighted_bipred_flag = get_bits1(gb);

  1503. 

  1504.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1505.     pps->tiles_enabled_flag               = get_bits1(gb);

  1506.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1507. 

  1508.     if (pps->tiles_enabled_flag) {

  1509.         pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

  1510.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

  1511.         if (pps->num_tile_columns <= 0 ||

  1512.             pps->num_tile_columns >= sps->width) {

  1513.             av_log(avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1514.                    pps->num_tile_columns - 1);

  1515.             ret = AVERROR_INVALIDDATA;

  1516.             goto err;

  1517.         }

  1518.         if (pps->num_tile_rows <= 0 ||

  1519.             pps->num_tile_rows >= sps->height) {

  1520.             av_log(avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1521.                    pps->num_tile_rows - 1);

  1522.             ret = AVERROR_INVALIDDATA;

  1523.             goto err;

  1524.         }

  1525. 

  1526.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1527.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1528.         if (!pps->column_width || !pps->row_height) {

  1529.             ret = AVERROR(ENOMEM);

  1530.             goto err;

  1531.         }

  1532. 

  1533.         pps->uniform_spacing_flag = get_bits1(gb);

  1534.         if (!pps->uniform_spacing_flag) {

  1535.             uint64_t sum = 0;

  1536.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1537.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1538.                 sum                 += pps->column_width[i];

  1539.             }

  1540.             if (sum >= sps->ctb_width) {

  1541.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1542.                 ret = AVERROR_INVALIDDATA;

  1543.                 goto err;

  1544.             }

  1545.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1546. 

  1547.             sum = 0;

  1548.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1549.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1550.                 sum               += pps->row_height[i];

  1551.             }

  1552.             if (sum >= sps->ctb_height) {

  1553.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1554.                 ret = AVERROR_INVALIDDATA;

  1555.                 goto err;

  1556.             }

  1557.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1558.         }

  1559.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1560.     }

  1561. 

  1562.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1563. 

  1564.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1565.     if (pps->deblocking_filter_control_present_flag) {

  1566.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1567.         pps->disable_dbf                             = get_bits1(gb);

  1568.         if (!pps->disable_dbf) {

  1569.             int beta_offset_div2 = get_se_golomb(gb);

  1570.             int tc_offset_div2   = get_se_golomb(gb) ;

  1571.             if (beta_offset_div2 < -6 || beta_offset_div2 > 6) {

  1572.                 av_log(avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1573.                        beta_offset_div2);

  1574.                 ret = AVERROR_INVALIDDATA;

  1575.                 goto err;

  1576.             }

  1577.             if (tc_offset_div2 < -6 || tc_offset_div2 > 6) {

  1578.                 av_log(avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1579.                        tc_offset_div2);

  1580.                 ret = AVERROR_INVALIDDATA;

  1581.                 goto err;

  1582.             }

  1583.             pps->beta_offset = 2 * beta_offset_div2;

  1584.             pps->tc_offset   = 2 *   tc_offset_div2;

  1585.         }

  1586.     }

  1587. 

  1588.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1589.     if (pps->scaling_list_data_present_flag) {

  1590.         set_default_scaling_list_data(&pps->scaling_list);

  1591.         ret = scaling_list_data(gb, avctx, &pps->scaling_list, sps);

  1592.         if (ret < 0)

  1593.             goto err;

  1594.     }

  1595.     pps->lists_modification_present_flag = get_bits1(gb);

  1596.     log2_parallel_merge_level_minus2     = get_ue_golomb_long(gb);

  1597.     if (log2_parallel_merge_level_minus2 > sps->log2_ctb_size) {

  1598.         av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1599.                log2_parallel_merge_level_minus2);

  1600.         ret = AVERROR_INVALIDDATA;

  1601.         goto err;

  1602.     }

  1603.     pps->log2_parallel_merge_level       = log2_parallel_merge_level_minus2 + 2;

  1604. 

  1605.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1606. 

  1607.     if (get_bits1(gb)) { // pps_extension_present_flag

  1608.         int pps_range_extensions_flag = get_bits1(gb);

  1609.         /* int pps_extension_7bits = */ get_bits(gb, 7);

  1610.         if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {

  1611.             if ((ret = pps_range_extensions(gb, avctx, pps, sps)) < 0)

  1612.                 goto err;

  1613.         }

  1614.     }

  1615. 

  1616.     ret = setup_pps(avctx, gb, pps, sps);

  1617.     if (ret < 0)

  1618.         goto err;

  1619. 

  1620.     if (get_bits_left(gb) < 0) {

  1621.         av_log(avctx, AV_LOG_ERROR,

  1622.                "Overread PPS by %d bits\n", -get_bits_left(gb));

  1623.         goto err;

  1624.     }

  1625. 

  1626.     remove_pps(ps, pps_id);

  1627.     ps->pps_list[pps_id] = pps_buf;

  1628. 

  1629.     return 0;

  1630. 

  1631. err:

  1632.     av_buffer_unref(&pps_buf);

  1633.     return ret;

  1634. }