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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.         rps->num_delta_pocs    = k;

  173.         rps->num_negative_pics = k0;

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

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

  176.             int used, tmp;

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

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

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

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

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

  182.                     if (delta_poc < tmp) {

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

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

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

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

  187.                     }

  188.                 }

  189.             }

  190.         }

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

  192.             int used;

  193.             k = rps->num_negative_pics - 1;

  194.             // flip the negative values to largest first

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

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

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

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

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

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

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

  202.                 k--;

  203.             }

  204.         }

  205.     } else {

  206.         unsigned int prev, nb_positive_pics;

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

  208.         nb_positive_pics       = get_ue_golomb_long(gb);

  209. 

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

  211.             nb_positive_pics >= MAX_REFS) {

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

  213.             return AVERROR_INVALIDDATA;

  214.         }

  215. 

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

  217.         if (rps->num_delta_pocs) {

  218.             prev = 0;

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

  220.                 delta_poc = get_ue_golomb_long(gb) + 1;

  221.                 prev -= delta_poc;

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

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

  224.             }

  225.             prev = 0;

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

  227.                 delta_poc = get_ue_golomb_long(gb) + 1;

  228.                 prev += delta_poc;

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

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

  231.             }

  232.         }

  233.     }

  234.     return 0;

  235. }

  236. 

  237. 

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

  239.                                       PTLCommon *ptl)

  240. {

  241.     int i;

  242. 

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

  244.         return -1;

  245. 

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

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

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

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

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

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

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

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

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

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

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

  257.     else

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

  259. 

  260.     for (i = 0; i < 32; i++) {

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

  262. 

  263.         if (ptl->profile_idc == 0 && i > 0 && ptl->profile_compatibility_flag[i])

  264.             ptl->profile_idc = i;

  265.     }

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

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

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

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

  270. 

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

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

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

  274. 

  275.     return 0;

  276. }

  277. 

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

  279.                       PTL *ptl, int max_num_sub_layers)

  280. {

  281.     int i;

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

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

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

  285.         return -1;

  286.     }

  287. 

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

  289. 

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

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

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

  293.     }

  294. 

  295.     if (max_num_sub_layers - 1> 0)

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

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

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

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

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

  301.             av_log(avctx, AV_LOG_ERROR,

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

  303.             return -1;

  304.         }

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

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

  307.                 av_log(avctx, AV_LOG_ERROR,

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

  309.                 return -1;

  310.             } else

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

  312.         }

  313.     }

  314. 

  315.     return 0;

  316. }

  317. 

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

  319.                                 int subpic_params_present)

  320. {

  321.     int i;

  322. 

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

  324.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  325.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  326. 

  327.         if (subpic_params_present) {

  328.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  329.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  330.         }

  331.         skip_bits1(gb); // cbr_flag

  332.     }

  333. }

  334. 

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

  336.                        int max_sublayers)

  337. {

  338.     int nal_params_present = 0, vcl_params_present = 0;

  339.     int subpic_params_present = 0;

  340.     int i;

  341. 

  342.     if (common_inf_present) {

  343.         nal_params_present = get_bits1(gb);

  344.         vcl_params_present = get_bits1(gb);

  345. 

  346.         if (nal_params_present || vcl_params_present) {

  347.             subpic_params_present = get_bits1(gb);

  348. 

  349.             if (subpic_params_present) {

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

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

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

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

  354.             }

  355. 

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

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

  358. 

  359.             if (subpic_params_present)

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

  361. 

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

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

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

  365.         }

  366.     }

  367. 

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

  369.         int low_delay = 0;

  370.         unsigned int nb_cpb = 1;

  371.         int fixed_rate = get_bits1(gb);

  372. 

  373.         if (!fixed_rate)

  374.             fixed_rate = get_bits1(gb);

  375. 

  376.         if (fixed_rate)

  377.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  378.         else

  379.             low_delay = get_bits1(gb);

  380. 

  381.         if (!low_delay) {

  382.             nb_cpb = get_ue_golomb_long(gb) + 1;

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

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

  385.                 return AVERROR_INVALIDDATA;

  386.             }

  387.         }

  388. 

  389.         if (nal_params_present)

  390.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  391.         if (vcl_params_present)

  392.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  393.     }

  394.     return 0;

  395. }

  396. 

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

  398.                            HEVCParamSets *ps)

  399. {

  400.     int i,j;

  401.     int vps_id = 0;

  402.     HEVCVPS *vps;

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

  404. 

  405.     if (!vps_buf)

  406.         return AVERROR(ENOMEM);

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

  408. 

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

  410. 

  411.     vps_id = get_bits(gb, 4);

  412.     if (vps_id >= MAX_VPS_COUNT) {

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

  414.         goto err;

  415.     }

  416. 

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

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

  419.         goto err;

  420.     }

  421. 

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

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

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

  425. 

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

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

  428.         goto err;

  429.     }

  430. 

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

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

  433.                vps->vps_max_sub_layers);

  434.         goto err;

  435.     }

  436. 

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

  438.         goto err;

  439. 

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

  441. 

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

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

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

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

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

  447. 

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

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

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

  451.             goto err;

  452.         }

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

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

  455.                    vps->vps_num_reorder_pics[i]);

  456.             if (avctx->err_recognition & AV_EF_EXPLODE)

  457.                 goto err;

  458.         }

  459.     }

  460. 

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

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

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

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

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

  466.         goto err;

  467.     }

  468. 

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

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

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

  472. 

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

  474.     if (vps->vps_timing_info_present_flag) {

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

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

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

  478.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  482.             av_log(avctx, AV_LOG_ERROR,

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

  484.             goto err;

  485.         }

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

  487.             int common_inf_present = 1;

  488. 

  489.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  490.             if (i)

  491.                 common_inf_present = get_bits1(gb);

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

  493.         }

  494.     }

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

  496. 

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

  498.         av_log(avctx, AV_LOG_ERROR,

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

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

  501.             goto err;

  502.     }

  503. 

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

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

  506.         av_buffer_unref(&vps_buf);

  507.     } else {

  508.         remove_vps(ps, vps_id);

  509.         ps->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(GetBitContext *gb, AVCodecContext *avctx,

  520.                        int apply_defdispwin, HEVCSPS *sps)

  521. {

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

  523.     GetBitContext backup;

  524.     int sar_present, alt = 0;

  525. 

  526.     av_log(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(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.             if (vui->matrix_coeffs == AVCOL_SPC_RGB) {

  565.                 switch (sps->pix_fmt) {

  566.                 case AV_PIX_FMT_YUV444P:

  567.                     sps->pix_fmt = AV_PIX_FMT_GBRP;

  568.                     break;

  569.                 case AV_PIX_FMT_YUV444P10:

  570.                     sps->pix_fmt = AV_PIX_FMT_GBRP10;

  571.                     break;

  572.                 case AV_PIX_FMT_YUV444P12:

  573.                     sps->pix_fmt = AV_PIX_FMT_GBRP12;

  574.                     break;

  575.                 }

  576.             }

  577.         }

  578.     }

  579. 

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

  581.     if (vui->chroma_loc_info_present_flag) {

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

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

  584.     }

  585. 

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

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

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

  589. 

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

  591.         vui->default_display_window_flag = 0;

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

  593.     } else

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

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

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

  597. 

  598.     if (vui->default_display_window_flag) {

  599.         int vert_mult  = 1 + (sps->chroma_format_idc < 2);

  600.         int horiz_mult = 1 + (sps->chroma_format_idc < 3);

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

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

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

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

  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 + scaling_list_delta_coef + 256) % 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.         int vert_mult  = 1 + (sps->chroma_format_idc < 2);

  874.         int horiz_mult = 1 + (sps->chroma_format_idc < 3);

  875.         sps->pic_conf_win.left_offset   = get_ue_golomb_long(gb) * horiz_mult;

  876.         sps->pic_conf_win.right_offset  = get_ue_golomb_long(gb) * horiz_mult;

  877.         sps->pic_conf_win.top_offset    = get_ue_golomb_long(gb) *  vert_mult;

  878.         sps->pic_conf_win.bottom_offset = get_ue_golomb_long(gb) *  vert_mult;

  879. 

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

  881.             av_log(avctx, AV_LOG_DEBUG,

  882.                    "discarding sps conformance window, "

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

  884.                    sps->pic_conf_win.left_offset,

  885.                    sps->pic_conf_win.right_offset,

  886.                    sps->pic_conf_win.top_offset,

  887.                    sps->pic_conf_win.bottom_offset);

  888. 

  889.             sps->pic_conf_win.left_offset   =

  890.             sps->pic_conf_win.right_offset  =

  891.             sps->pic_conf_win.top_offset    =

  892.             sps->pic_conf_win.bottom_offset = 0;

  893.         }

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

  895.     }

  896. 

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

  898.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  900.         av_log(avctx, AV_LOG_ERROR,

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

  902.                "this is unsupported.\n",

  903.                sps->bit_depth, bit_depth_chroma);

  904.         return AVERROR_INVALIDDATA;

  905.     }

  906. 

  907.     ret = map_pixel_format(avctx, sps);

  908.     if (ret < 0)

  909.         return ret;

  910. 

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

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

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

  914.                sps->log2_max_poc_lsb - 4);

  915.         return AVERROR_INVALIDDATA;

  916.     }

  917. 

  918.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  927.             return AVERROR_INVALIDDATA;

  928.         }

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

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

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

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

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

  934.                 return AVERROR_INVALIDDATA;

  935.             }

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

  937.         }

  938.     }

  939. 

  940.     if (!sublayer_ordering_info) {

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

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

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

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

  945.         }

  946.     }

  947. 

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

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

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

  951.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  952.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  953.                                                sps->log2_min_tb_size;

  954. 

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

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

  957.         return AVERROR_INVALIDDATA;

  958.     }

  959. 

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

  961.         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);

  962.         return AVERROR_INVALIDDATA;

  963.     }

  964. 

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

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

  967.         return AVERROR_INVALIDDATA;

  968.     }

  969. 

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

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

  972.         return AVERROR_INVALIDDATA;

  973.     }

  974. 

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

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

  977. 

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

  979.     if (sps->scaling_list_enable_flag) {

  980.         set_default_scaling_list_data(&sps->scaling_list);

  981. 

  982.         if (get_bits1(gb)) {

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

  984.             if (ret < 0)

  985.                 return ret;

  986.         }

  987.     }

  988. 

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

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

  991. 

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

  993.     if (sps->pcm_enabled_flag) {

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

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

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

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

  998.                                         get_ue_golomb_long(gb);

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

  1000.             av_log(avctx, AV_LOG_ERROR,

  1001.                    "PCM bit depth (%d) is greater than normal bit depth (%d)\n",

  1002.                    sps->pcm.bit_depth, sps->bit_depth);

  1003.             return AVERROR_INVALIDDATA;

  1004.         }

  1005. 

  1006.         sps->pcm.loop_filter_disable_flag = get_bits1(gb);

  1007.     }

  1008. 

  1009.     sps->nb_st_rps = get_ue_golomb_long(gb);

  1010.     if (sps->nb_st_rps > MAX_SHORT_TERM_RPS_COUNT) {

  1011.         av_log(avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",

  1012.                sps->nb_st_rps);

  1013.         return AVERROR_INVALIDDATA;

  1014.     }

  1015.     for (i = 0; i < sps->nb_st_rps; i++) {

  1016.         if ((ret = ff_hevc_decode_short_term_rps(gb, avctx, &sps->st_rps[i],

  1017.                                                  sps, 0)) < 0)

  1018.             return ret;

  1019.     }

  1020. 

  1021.     sps->long_term_ref_pics_present_flag = get_bits1(gb);

  1022.     if (sps->long_term_ref_pics_present_flag) {

  1023.         sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);

  1024.         if (sps->num_long_term_ref_pics_sps > 31U) {

  1025.             av_log(avctx, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",

  1026.                    sps->num_long_term_ref_pics_sps);

  1027.             return AVERROR_INVALIDDATA;

  1028.         }

  1029.         for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {

  1030.             sps->lt_ref_pic_poc_lsb_sps[i]       = get_bits(gb, sps->log2_max_poc_lsb);

  1031.             sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);

  1032.         }

  1033.     }

  1034. 

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

  1036.     sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);

  1037.     sps->vui.sar = (AVRational){0, 1};

  1038.     vui_present = get_bits1(gb);

  1039.     if (vui_present)

  1040.         decode_vui(gb, avctx, apply_defdispwin, sps);

  1041. 

  1042.     if (get_bits1(gb)) { // sps_extension_flag

  1043.         int sps_extension_flag[1];

  1044.         for (i = 0; i < 1; i++)

  1045.             sps_extension_flag[i] = get_bits1(gb);

  1046.         skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);

  1047.         if (sps_extension_flag[0]) {

  1048.             int extended_precision_processing_flag;

  1049.             int high_precision_offsets_enabled_flag;

  1050.             int cabac_bypass_alignment_enabled_flag;

  1051. 

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

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

  1054.             sps->implicit_rdpcm_enabled_flag = get_bits1(gb);

  1055. 

  1056.             sps->explicit_rdpcm_enabled_flag = get_bits1(gb);

  1057. 

  1058.             extended_precision_processing_flag = get_bits1(gb);

  1059.             if (extended_precision_processing_flag)

  1060.                 av_log(avctx, AV_LOG_WARNING,

  1061.                    "extended_precision_processing_flag not yet implemented\n");

  1062. 

  1063.             sps->intra_smoothing_disabled_flag       = get_bits1(gb);

  1064.             high_precision_offsets_enabled_flag  = get_bits1(gb);

  1065.             if (high_precision_offsets_enabled_flag)

  1066.                 av_log(avctx, AV_LOG_WARNING,

  1067.                    "high_precision_offsets_enabled_flag not yet implemented\n");

  1068. 

  1069.             sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);

  1070. 

  1071.             cabac_bypass_alignment_enabled_flag  = get_bits1(gb);

  1072.             if (cabac_bypass_alignment_enabled_flag)

  1073.                 av_log(avctx, AV_LOG_WARNING,

  1074.                    "cabac_bypass_alignment_enabled_flag not yet implemented\n");

  1075.         }

  1076.     }

  1077.     if (apply_defdispwin) {

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

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

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

  1081.         sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

  1082.     }

  1083.     if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) &&

  1084.         !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {

  1085.         sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));

  1086.         av_log(avctx, AV_LOG_WARNING, "Reducing left output window to %d "

  1087.                "chroma samples to preserve alignment.\n",

  1088.                sps->output_window.left_offset);

  1089.     }

  1090.     sps->output_width  = sps->width -

  1091.                          (sps->output_window.left_offset + sps->output_window.right_offset);

  1092.     sps->output_height = sps->height -

  1093.                          (sps->output_window.top_offset + sps->output_window.bottom_offset);

  1094.     if (sps->width  <= sps->output_window.left_offset + (int64_t)sps->output_window.right_offset  ||

  1095.         sps->height <= sps->output_window.top_offset  + (int64_t)sps->output_window.bottom_offset) {

  1096.         av_log(avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",

  1097.                sps->output_width, sps->output_height);

  1098.         if (avctx->err_recognition & AV_EF_EXPLODE) {

  1099.             return AVERROR_INVALIDDATA;

  1100.         }

  1101.         av_log(avctx, AV_LOG_WARNING,

  1102.                "Displaying the whole video surface.\n");

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

  1104.         memset(&sps->output_window, 0, sizeof(sps->output_window));

  1105.         sps->output_width               = sps->width;

  1106.         sps->output_height              = sps->height;

  1107.     }

  1108. 

  1109.     // Inferred parameters

  1110.     sps->log2_ctb_size = sps->log2_min_cb_size +

  1111.                          sps->log2_diff_max_min_coding_block_size;

  1112.     sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

  1113. 

  1114.     if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {

  1115.         av_log(avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);

  1116.         return AVERROR_INVALIDDATA;

  1117.     }

  1118.     if (sps->log2_ctb_size < 4) {

  1119.         av_log(avctx,

  1120.                AV_LOG_ERROR,

  1121.                "log2_ctb_size %d differs from the bounds of any known profile\n",

  1122.                sps->log2_ctb_size);

  1123.         avpriv_request_sample(avctx, "log2_ctb_size %d", sps->log2_ctb_size);

  1124.         return AVERROR_INVALIDDATA;

  1125.     }

  1126. 

  1127.     sps->ctb_width  = (sps->width  + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1128.     sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1129.     sps->ctb_size   = sps->ctb_width * sps->ctb_height;

  1130. 

  1131.     sps->min_cb_width  = sps->width  >> sps->log2_min_cb_size;

  1132.     sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

  1133.     sps->min_tb_width  = sps->width  >> sps->log2_min_tb_size;

  1134.     sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

  1135.     sps->min_pu_width  = sps->width  >> sps->log2_min_pu_size;

  1136.     sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

  1137.     sps->tb_mask       = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;

  1138. 

  1139.     sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

  1140. 

  1141.     if (av_mod_uintp2(sps->width, sps->log2_min_cb_size) ||

  1142.         av_mod_uintp2(sps->height, sps->log2_min_cb_size)) {

  1143.         av_log(avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  1144.         return AVERROR_INVALIDDATA;

  1145.     }

  1146. 

  1147.     if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1148.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

  1149.                sps->max_transform_hierarchy_depth_inter);

  1150.         return AVERROR_INVALIDDATA;

  1151.     }

  1152.     if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1153.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  1154.                sps->max_transform_hierarchy_depth_intra);

  1155.         return AVERROR_INVALIDDATA;

  1156.     }

  1157.     if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

  1158.         av_log(avctx, AV_LOG_ERROR,

  1159.                "max transform block size out of range: %d\n",

  1160.                sps->log2_max_trafo_size);

  1161.         return AVERROR_INVALIDDATA;

  1162.     }

  1163. 

  1164.     if (get_bits_left(gb) < 0) {

  1165.         av_log(avctx, AV_LOG_ERROR,

  1166.                "Overread SPS by %d bits\n", -get_bits_left(gb));

  1167.         return AVERROR_INVALIDDATA;

  1168.     }

  1169. 

  1170.     return 0;

  1171. }

  1172. 

  1173. int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,

  1174.                            HEVCParamSets *ps, int apply_defdispwin)

  1175. {

  1176.     HEVCSPS *sps;

  1177.     AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));

  1178.     unsigned int sps_id;

  1179.     int ret;

  1180. 

  1181.     if (!sps_buf)

  1182.         return AVERROR(ENOMEM);

  1183.     sps = (HEVCSPS*)sps_buf->data;

  1184. 

  1185.     av_log(avctx, AV_LOG_DEBUG, "Decoding SPS\n");

  1186. 

  1187.     ret = ff_hevc_parse_sps(sps, gb, &sps_id,

  1188.                             apply_defdispwin,

  1189.                             ps->vps_list, avctx);

  1190.     if (ret < 0) {

  1191.         av_buffer_unref(&sps_buf);

  1192.         return ret;

  1193.     }

  1194. 

  1195.     if (avctx->debug & FF_DEBUG_BITSTREAM) {

  1196.         av_log(avctx, AV_LOG_DEBUG,

  1197.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1198.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1199.                sps_id, sps->width, sps->height,

  1200.                sps->output_width, sps->output_height,

  1201.                av_get_pix_fmt_name(sps->pix_fmt));

  1202.     }

  1203. 

  1204.     /* check if this is a repeat of an already parsed SPS, then keep the

  1205.      * original one.

  1206.      * otherwise drop all PPSes that depend on it */

  1207.     if (ps->sps_list[sps_id] &&

  1208.         !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1209.         av_buffer_unref(&sps_buf);

  1210.     } else {

  1211.         remove_sps(ps, sps_id);

  1212.         ps->sps_list[sps_id] = sps_buf;

  1213.     }

  1214. 

  1215.     return 0;

  1216. }

  1217. 

  1218. static void hevc_pps_free(void *opaque, uint8_t *data)

  1219. {

  1220.     HEVCPPS *pps = (HEVCPPS*)data;

  1221. 

  1222.     av_freep(&pps->column_width);

  1223.     av_freep(&pps->row_height);

  1224.     av_freep(&pps->col_bd);

  1225.     av_freep(&pps->row_bd);

  1226.     av_freep(&pps->col_idxX);

  1227.     av_freep(&pps->ctb_addr_rs_to_ts);

  1228.     av_freep(&pps->ctb_addr_ts_to_rs);

  1229.     av_freep(&pps->tile_pos_rs);

  1230.     av_freep(&pps->tile_id);

  1231.     av_freep(&pps->min_tb_addr_zs_tab);

  1232. 

  1233.     av_freep(&pps);

  1234. }

  1235. 

  1236. static int pps_range_extensions(GetBitContext *gb, AVCodecContext *avctx,

  1237.                                 HEVCPPS *pps, HEVCSPS *sps) {

  1238.     int i;

  1239. 

  1240.     if (pps->transform_skip_enabled_flag) {

  1241.         pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;

  1242.     }

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

  1244.     pps->chroma_qp_offset_list_enabled_flag = get_bits1(gb);

  1245.     if (pps->chroma_qp_offset_list_enabled_flag) {

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

  1247.         pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);

  1248.         if (pps->chroma_qp_offset_list_len_minus1 && pps->chroma_qp_offset_list_len_minus1 >= 5) {

  1249.             av_log(avctx, AV_LOG_ERROR,

  1250.                    "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");

  1251.             return AVERROR_INVALIDDATA;

  1252.         }

  1253.         for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {

  1254.             pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);

  1255.             if (pps->cb_qp_offset_list[i]) {

  1256.                 av_log(avctx, AV_LOG_WARNING,

  1257.                        "cb_qp_offset_list not tested yet.\n");

  1258.             }

  1259.             pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);

  1260.             if (pps->cr_qp_offset_list[i]) {

  1261.                 av_log(avctx, AV_LOG_WARNING,

  1262.                        "cb_qp_offset_list not tested yet.\n");

  1263.             }

  1264.         }

  1265.     }

  1266.     pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);

  1267.     pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);

  1268. 

  1269.     return(0);

  1270. }

  1271. 

  1272. static inline int setup_pps(AVCodecContext *avctx, GetBitContext *gb,

  1273.                             HEVCPPS *pps, HEVCSPS *sps)

  1274. {

  1275.     int log2_diff;

  1276.     int pic_area_in_ctbs;

  1277.     int i, j, x, y, ctb_addr_rs, tile_id;

  1278. 

  1279.     // Inferred parameters

  1280.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1281.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1282.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1283.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX)

  1284.         return AVERROR(ENOMEM);

  1285. 

  1286.     if (pps->uniform_spacing_flag) {

  1287.         if (!pps->column_width) {

  1288.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1289.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1290.         }

  1291.         if (!pps->column_width || !pps->row_height)

  1292.             return AVERROR(ENOMEM);

  1293. 

  1294.         for (i = 0; i < pps->num_tile_columns; i++) {

  1295.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1296.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1297.         }

  1298. 

  1299.         for (i = 0; i < pps->num_tile_rows; i++) {

  1300.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1301.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1302.         }

  1303.     }

  1304. 

  1305.     pps->col_bd[0] = 0;

  1306.     for (i = 0; i < pps->num_tile_columns; i++)

  1307.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1308. 

  1309.     pps->row_bd[0] = 0;

  1310.     for (i = 0; i < pps->num_tile_rows; i++)

  1311.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1312. 

  1313.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1314.         if (i > pps->col_bd[j])

  1315.             j++;

  1316.         pps->col_idxX[i] = j;

  1317.     }

  1318. 

  1319.     /**

  1320.      * 6.5

  1321.      */

  1322.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1323. 

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

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

  1326.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1327.     pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));

  1328.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1329.         !pps->tile_id || !pps->min_tb_addr_zs_tab) {

  1330.         return AVERROR(ENOMEM);

  1331.     }

  1332. 

  1333.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1334.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1335.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1336.         int tile_x = 0;

  1337.         int tile_y = 0;

  1338.         int val    = 0;

  1339. 

  1340.         for (i = 0; i < pps->num_tile_columns; i++) {

  1341.             if (tb_x < pps->col_bd[i + 1]) {

  1342.                 tile_x = i;

  1343.                 break;

  1344.             }

  1345.         }

  1346. 

  1347.         for (i = 0; i < pps->num_tile_rows; i++) {

  1348.             if (tb_y < pps->row_bd[i + 1]) {

  1349.                 tile_y = i;

  1350.                 break;

  1351.             }

  1352.         }

  1353. 

  1354.         for (i = 0; i < tile_x; i++)

  1355.             val += pps->row_height[tile_y] * pps->column_width[i];

  1356.         for (i = 0; i < tile_y; i++)

  1357.             val += sps->ctb_width * pps->row_height[i];

  1358. 

  1359.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1360.                tb_x - pps->col_bd[tile_x];

  1361. 

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

  1363.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1364.     }

  1365. 

  1366.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1367.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1368.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1369.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1370.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1371. 

  1372.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1373.     if (!pps->tile_pos_rs)

  1374.         return AVERROR(ENOMEM);

  1375. 

  1376.     for (j = 0; j < pps->num_tile_rows; j++)

  1377.         for (i = 0; i < pps->num_tile_columns; i++)

  1378.             pps->tile_pos_rs[j * pps->num_tile_columns + i] =

  1379.                 pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1380. 

  1381.     log2_diff = sps->log2_ctb_size - sps->log2_min_tb_size;

  1382.     pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];

  1383.     for (y = 0; y < sps->tb_mask+2; y++) {

  1384.         pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;

  1385.         pps->min_tb_addr_zs_tab[y]    = -1;

  1386.     }

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

  1388.         for (x = 0; x < sps->tb_mask+1; x++) {

  1389.             int tb_x = x >> log2_diff;

  1390.             int tb_y = y >> log2_diff;

  1391.             int rs   = sps->ctb_width * tb_y + tb_x;

  1392.             int val  = pps->ctb_addr_rs_to_ts[rs] << (log2_diff * 2);

  1393.             for (i = 0; i < log2_diff; i++) {

  1394.                 int m = 1 << i;

  1395.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1396.             }

  1397.             pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;

  1398.         }

  1399.     }

  1400. 

  1401.     return 0;

  1402. }

  1403. 

  1404. int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,

  1405.                            HEVCParamSets *ps)

  1406. {

  1407.     HEVCSPS      *sps = NULL;

  1408.     int i, ret = 0;

  1409.     unsigned int pps_id = 0;

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

  1570.             pps->tc_offset = get_se_golomb(gb) * 2;

  1571.             if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

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

  1573.                        pps->beta_offset/2);

  1574.                 ret = AVERROR_INVALIDDATA;

  1575.                 goto err;

  1576.             }

  1577.             if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

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

  1579.                        pps->tc_offset/2);

  1580.                 ret = AVERROR_INVALIDDATA;

  1581.                 goto err;

  1582.             }

  1583.         }

  1584.     }

  1585. 

  1586.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1587.     if (pps->scaling_list_data_present_flag) {

  1588.         set_default_scaling_list_data(&pps->scaling_list);

  1589.         ret = scaling_list_data(gb, avctx, &pps->scaling_list, sps);

  1590.         if (ret < 0)

  1591.             goto err;

  1592.     }

  1593.     pps->lists_modification_present_flag = get_bits1(gb);

  1594.     pps->log2_parallel_merge_level       = get_ue_golomb_long(gb) + 2;

  1595.     if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {

  1596.         av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1597.                pps->log2_parallel_merge_level - 2);

  1598.         ret = AVERROR_INVALIDDATA;

  1599.         goto err;

  1600.     }

  1601. 

  1602.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1603. 

  1604.     if (get_bits1(gb)) { // pps_extension_present_flag

  1605.         int pps_range_extensions_flag = get_bits1(gb);

  1606.         /* int pps_extension_7bits = */ get_bits(gb, 7);

  1607.         if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {

  1608.             if ((ret = pps_range_extensions(gb, avctx, pps, sps)) < 0)

  1609.                 goto err;

  1610.         }

  1611.     }

  1612. 

  1613.     ret = setup_pps(avctx, gb, pps, sps);

  1614.     if (ret < 0)

  1615.         goto err;

  1616. 

  1617.     if (get_bits_left(gb) < 0) {

  1618.         av_log(avctx, AV_LOG_ERROR,

  1619.                "Overread PPS by %d bits\n", -get_bits_left(gb));

  1620.         goto err;

  1621.     }

  1622. 

  1623.     remove_pps(ps, pps_id);

  1624.     ps->pps_list[pps_id] = pps_buf;

  1625. 

  1626.     return 0;

  1627. 

  1628. err:

  1629.     av_buffer_unref(&pps_buf);

  1630.     return ret;

  1631. }