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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_data.h"

  29. #include "hevc_ps.h"

  30. 

  31. static const uint8_t default_scaling_list_intra[] = {

  32.     16, 16, 16, 16, 17, 18, 21, 24,

  33.     16, 16, 16, 16, 17, 19, 22, 25,

  34.     16, 16, 17, 18, 20, 22, 25, 29,

  35.     16, 16, 18, 21, 24, 27, 31, 36,

  36.     17, 17, 20, 24, 30, 35, 41, 47,

  37.     18, 19, 22, 27, 35, 44, 54, 65,

  38.     21, 22, 25, 31, 41, 54, 70, 88,

  39.     24, 25, 29, 36, 47, 65, 88, 115

  40. };

  41. 

  42. static const uint8_t default_scaling_list_inter[] = {

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

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

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

  46.     16, 17, 18, 20, 24, 25, 28, 33,

  47.     17, 18, 20, 24, 25, 28, 33, 41,

  48.     18, 20, 24, 25, 28, 33, 41, 54,

  49.     20, 24, 25, 28, 33, 41, 54, 71,

  50.     24, 25, 28, 33, 41, 54, 71, 91

  51. };

  52. 

  53. static const AVRational vui_sar[] = {

  54.     {  0,   1 },

  55.     {  1,   1 },

  56.     { 12,  11 },

  57.     { 10,  11 },

  58.     { 16,  11 },

  59.     { 40,  33 },

  60.     { 24,  11 },

  61.     { 20,  11 },

  62.     { 32,  11 },

  63.     { 80,  33 },

  64.     { 18,  11 },

  65.     { 15,  11 },

  66.     { 64,  33 },

  67.     { 160, 99 },

  68.     {  4,   3 },

  69.     {  3,   2 },

  70.     {  2,   1 },

  71. };

  72. 

  73. static void remove_pps(HEVCParamSets *s, int id)

  74. {

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

  76.         s->pps = NULL;

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

  78. }

  79. 

  80. static void remove_sps(HEVCParamSets *s, int id)

  81. {

  82.     int i;

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

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

  85.             s->sps = NULL;

  86. 

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

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

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

  90.                 remove_pps(s, i);

  91. 

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

  93.     }

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

  95. }

  96. 

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

  98. {

  99.     int i;

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

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

  102.             s->vps = NULL;

  103. 

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

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

  106.                 remove_sps(s, i);

  107.     }

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

  109. }

  110. 

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

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

  113. {

  114.     uint8_t rps_predict = 0;

  115.     int delta_poc;

  116.     int k0 = 0;

  117.     int k1 = 0;

  118.     int k  = 0;

  119.     int i;

  120. 

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

  122.         rps_predict = get_bits1(gb);

  123. 

  124.     if (rps_predict) {

  125.         const ShortTermRPS *rps_ridx;

  126.         int delta_rps;

  127.         unsigned abs_delta_rps;

  128.         uint8_t use_delta_flag = 0;

  129.         uint8_t delta_rps_sign;

  130. 

  131.         if (is_slice_header) {

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

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

  134.                 av_log(avctx, AV_LOG_ERROR,

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

  136.                        delta_idx, sps->nb_st_rps);

  137.                 return AVERROR_INVALIDDATA;

  138.             }

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

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

  141.         } else

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

  143. 

  144.         delta_rps_sign = get_bits1(gb);

  145.         abs_delta_rps  = get_ue_golomb_long(gb) + 1;

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

  147.             av_log(avctx, AV_LOG_ERROR,

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

  149.                    abs_delta_rps);

  150.             return AVERROR_INVALIDDATA;

  151.         }

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

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

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

  155. 

  156.             if (!used)

  157.                 use_delta_flag = get_bits1(gb);

  158. 

  159.             if (used || use_delta_flag) {

  160.                 if (i < rps_ridx->num_delta_pocs)

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

  162.                 else

  163.                     delta_poc = delta_rps;

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

  165.                 if (delta_poc < 0)

  166.                     k0++;

  167.                 else

  168.                     k1++;

  169.                 k++;

  170.             }

  171.         }

  172. 

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

  174.             av_log(avctx, AV_LOG_ERROR,

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

  176.             return AVERROR_INVALIDDATA;

  177.         }

  178. 

  179.         rps->num_delta_pocs    = k;

  180.         rps->num_negative_pics = k0;

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

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

  183.             int used, tmp;

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

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

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

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

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

  189.                     if (delta_poc < tmp) {

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

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

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

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

  194.                     }

  195.                 }

  196.             }

  197.         }

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

  199.             int used;

  200.             k = rps->num_negative_pics - 1;

  201.             // flip the negative values to largest first

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

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

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

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

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

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

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

  209.                 k--;

  210.             }

  211.         }

  212.     } else {

  213.         unsigned int prev, nb_positive_pics;

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

  215.         nb_positive_pics       = get_ue_golomb_long(gb);

  216. 

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

  218.             nb_positive_pics >= HEVC_MAX_REFS) {

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

  220.             return AVERROR_INVALIDDATA;

  221.         }

  222. 

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

  224.         if (rps->num_delta_pocs) {

  225.             prev = 0;

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

  227.                 delta_poc = get_ue_golomb_long(gb) + 1;

  228.                 prev -= delta_poc;

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

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

  231.             }

  232.             prev = 0;

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

  234.                 delta_poc = get_ue_golomb_long(gb) + 1;

  235.                 prev += delta_poc;

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

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

  238.             }

  239.         }

  240.     }

  241.     return 0;

  242. }

  243. 

  244. 

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

  246.                                       PTLCommon *ptl)

  247. {

  248.     int i;

  249. 

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

  251.         return -1;

  252. 

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

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

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

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

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

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

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

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

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

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

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

  264.     else

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

  266. 

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

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

  269. 

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

  271.             ptl->profile_idc = i;

  272.     }

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

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

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

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

  277. 

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

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

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

  281. 

  282.     return 0;

  283. }

  284. 

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

  286.                       PTL *ptl, int max_num_sub_layers)

  287. {

  288.     int i;

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

  290.         get_bits_left(gb) < 8 + (8*2 * (max_num_sub_layers - 1 > 0))) {

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

  292.         return -1;

  293.     }

  294. 

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

  296. 

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

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

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

  300.     }

  301. 

  302.     if (max_num_sub_layers - 1> 0)

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

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

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

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

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

  308.             av_log(avctx, AV_LOG_ERROR,

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

  310.             return -1;

  311.         }

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

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

  314.                 av_log(avctx, AV_LOG_ERROR,

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

  316.                 return -1;

  317.             } else

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

  319.         }

  320.     }

  321. 

  322.     return 0;

  323. }

  324. 

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

  326.                                 int subpic_params_present)

  327. {

  328.     int i;

  329. 

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

  331.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  332.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  333. 

  334.         if (subpic_params_present) {

  335.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  336.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  337.         }

  338.         skip_bits1(gb); // cbr_flag

  339.     }

  340. }

  341. 

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

  343.                        int max_sublayers)

  344. {

  345.     int nal_params_present = 0, vcl_params_present = 0;

  346.     int subpic_params_present = 0;

  347.     int i;

  348. 

  349.     if (common_inf_present) {

  350.         nal_params_present = get_bits1(gb);

  351.         vcl_params_present = get_bits1(gb);

  352. 

  353.         if (nal_params_present || vcl_params_present) {

  354.             subpic_params_present = get_bits1(gb);

  355. 

  356.             if (subpic_params_present) {

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

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

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

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

  361.             }

  362. 

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

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

  365. 

  366.             if (subpic_params_present)

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

  368. 

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

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

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

  372.         }

  373.     }

  374. 

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

  376.         int low_delay = 0;

  377.         unsigned int nb_cpb = 1;

  378.         int fixed_rate = get_bits1(gb);

  379. 

  380.         if (!fixed_rate)

  381.             fixed_rate = get_bits1(gb);

  382. 

  383.         if (fixed_rate)

  384.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  385.         else

  386.             low_delay = get_bits1(gb);

  387. 

  388.         if (!low_delay) {

  389.             nb_cpb = get_ue_golomb_long(gb) + 1;

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

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

  392.                 return AVERROR_INVALIDDATA;

  393.             }

  394.         }

  395. 

  396.         if (nal_params_present)

  397.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  398.         if (vcl_params_present)

  399.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  400.     }

  401.     return 0;

  402. }

  403. 

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

  405.                            HEVCParamSets *ps)

  406. {

  407.     int i,j;

  408.     int vps_id = 0;

  409.     ptrdiff_t nal_size;

  410.     HEVCVPS *vps;

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

  412. 

  413.     if (!vps_buf)

  414.         return AVERROR(ENOMEM);

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

  416. 

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

  418. 

  419.     nal_size = gb->buffer_end - gb->buffer;

  420.     if (nal_size > sizeof(vps->data)) {

  421.         av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized VPS "

  422.                "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",

  423.                nal_size, sizeof(vps->data));

  424.         vps->data_size = sizeof(vps->data);

  425.     } else {

  426.         vps->data_size = nal_size;

  427.     }

  428.     memcpy(vps->data, gb->buffer, vps->data_size);

  429. 

  430.     vps_id = get_bits(gb, 4);

  431.     if (vps_id >= HEVC_MAX_VPS_COUNT) {

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

  433.         goto err;

  434.     }

  435. 

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

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

  438.         goto err;

  439.     }

  440. 

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

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

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

  444. 

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

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

  447.         goto err;

  448.     }

  449. 

  450.     if (vps->vps_max_sub_layers > HEVC_MAX_SUB_LAYERS) {

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

  452.                vps->vps_max_sub_layers);

  453.         goto err;

  454.     }

  455. 

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

  457.         goto err;

  458. 

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

  460. 

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

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

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

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

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

  466. 

  467.         if (vps->vps_max_dec_pic_buffering[i] > HEVC_MAX_DPB_SIZE || !vps->vps_max_dec_pic_buffering[i]) {

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

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

  470.             goto err;

  471.         }

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

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

  474.                    vps->vps_num_reorder_pics[i]);

  475.             if (avctx->err_recognition & AV_EF_EXPLODE)

  476.                 goto err;

  477.         }

  478.     }

  479. 

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

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

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

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

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

  485.         goto err;

  486.     }

  487. 

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

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

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

  491. 

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

  493.     if (vps->vps_timing_info_present_flag) {

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

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

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

  497.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  501.             av_log(avctx, AV_LOG_ERROR,

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

  503.             goto err;

  504.         }

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

  506.             int common_inf_present = 1;

  507. 

  508.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  509.             if (i)

  510.                 common_inf_present = get_bits1(gb);

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

  512.         }

  513.     }

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

  515. 

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

  517.         av_log(avctx, AV_LOG_ERROR,

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

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

  520.             goto err;

  521.     }

  522. 

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

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

  525.         av_buffer_unref(&vps_buf);

  526.     } else {

  527.         remove_vps(ps, vps_id);

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

  529.     }

  530. 

  531.     return 0;

  532. 

  533. err:

  534.     av_buffer_unref(&vps_buf);

  535.     return AVERROR_INVALIDDATA;

  536. }

  537. 

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

  539.                        int apply_defdispwin, HEVCSPS *sps)

  540. {

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

  542.     GetBitContext backup;

  543.     int sar_present, alt = 0;

  544. 

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

  546. 

  547.     sar_present = get_bits1(gb);

  548.     if (sar_present) {

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

  550.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  552.         else if (sar_idx == 255) {

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

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

  555.         } else

  556.             av_log(avctx, AV_LOG_WARNING,

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

  558.     }

  559. 

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

  561.     if (vui->overscan_info_present_flag)

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

  563. 

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

  565.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  570.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  571.         if (vui->colour_description_present_flag) {

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

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

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

  575. 

  576.             // Set invalid values to "unspecified"

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

  578.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  580.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  582.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

  583.             if (vui->matrix_coeffs == AVCOL_SPC_RGB) {

  584.                 switch (sps->pix_fmt) {

  585.                 case AV_PIX_FMT_YUV444P:

  586.                     sps->pix_fmt = AV_PIX_FMT_GBRP;

  587.                     break;

  588.                 case AV_PIX_FMT_YUV444P10:

  589.                     sps->pix_fmt = AV_PIX_FMT_GBRP10;

  590.                     break;

  591.                 case AV_PIX_FMT_YUV444P12:

  592.                     sps->pix_fmt = AV_PIX_FMT_GBRP12;

  593.                     break;

  594.                 }

  595.             }

  596.         }

  597.     }

  598. 

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

  600.     if (vui->chroma_loc_info_present_flag) {

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

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

  603.     }

  604. 

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

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

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

  608. 

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

  610.         vui->default_display_window_flag = 0;

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

  612.     } else

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

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

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

  616. 

  617.     if (vui->default_display_window_flag) {

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

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

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

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

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

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

  624. 

  625.         if (apply_defdispwin &&

  626.             avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {

  627.             av_log(avctx, AV_LOG_DEBUG,

  628.                    "discarding vui default display window, "

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

  630.                    vui->def_disp_win.left_offset,

  631.                    vui->def_disp_win.right_offset,

  632.                    vui->def_disp_win.top_offset,

  633.                    vui->def_disp_win.bottom_offset);

  634. 

  635.             vui->def_disp_win.left_offset   =

  636.             vui->def_disp_win.right_offset  =

  637.             vui->def_disp_win.top_offset    =

  638.             vui->def_disp_win.bottom_offset = 0;

  639.         }

  640.     }

  641. 

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

  643. 

  644.     if (vui->vui_timing_info_present_flag) {

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

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

  647.             // at where def_disp_win is normally located

  648.             av_log(avctx, AV_LOG_WARNING,

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

  650.             vui->default_display_window_flag = 0;

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

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

  653.             alt = 1;

  654.         }

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

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

  657.         if (alt) {

  658.             av_log(avctx, AV_LOG_INFO, "Retry got %"PRIu32"/%"PRIu32" fps\n",

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

  660.         }

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

  662.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  665.         if (vui->vui_hrd_parameters_present_flag)

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

  667.     }

  668. 

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

  670.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  679.     }

  680. }

  681. 

  682. static void set_default_scaling_list_data(ScalingList *sl)

  683. {

  684.     int matrixId;

  685. 

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

  687.         // 4x4 default is 16

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

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

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

  691.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  710. }

  711. 

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

  713. {

  714.     uint8_t scaling_list_pred_mode_flag;

  715.     int32_t scaling_list_dc_coef[2][6];

  716.     int size_id, matrix_id, pos;

  717.     int i;

  718. 

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

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

  721.             scaling_list_pred_mode_flag = get_bits1(gb);

  722.             if (!scaling_list_pred_mode_flag) {

  723.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  726.                 if (delta) {

  727.                     // Copy from previous array.

  728.                     if (matrix_id < delta) {

  729.                         av_log(avctx, AV_LOG_ERROR,

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

  731.                         return AVERROR_INVALIDDATA;

  732.                     }

  733. 

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

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

  736.                            size_id > 0 ? 64 : 16);

  737.                     if (size_id > 1)

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

  739.                 }

  740.             } else {

  741.                 int next_coef, coef_num;

  742.                 int32_t scaling_list_delta_coef;

  743. 

  744.                 next_coef = 8;

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

  746.                 if (size_id > 1) {

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

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

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

  750.                 }

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

  752.                     if (size_id == 0)

  753.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  754.                                   ff_hevc_diag_scan4x4_x[i];

  755.                     else

  756.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  757.                                   ff_hevc_diag_scan8x8_x[i];

  758. 

  759.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  762.                 }

  763.             }

  764.         }

  765. 

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

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

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

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

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

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

  772.         }

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

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

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

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

  777.     }

  778. 

  779. 

  780.     return 0;

  781. }

  782. 

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

  784. {

  785.     const AVPixFmtDescriptor *desc;

  786.     switch (sps->bit_depth) {

  787.     case 8:

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

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

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

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

  792.        break;

  793.     case 9:

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

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

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

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

  798.         break;

  799.     case 10:

  800.         if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY10;

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

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

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

  804.         break;

  805.     case 12:

  806.         if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY12;

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

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

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

  810.         break;

  811.     default:

  812.         av_log(avctx, AV_LOG_ERROR,

  813.                "The following bit-depths are currently specified: 8, 9, 10 and 12 bits, "

  814.                "chroma_format_idc is %d, depth is %d\n",

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

  816.         return AVERROR_INVALIDDATA;

  817.     }

  818. 

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

  820.     if (!desc)

  821.         return AVERROR(EINVAL);

  822. 

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

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

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

  826. 

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

  828. 

  829.     return 0;

  830. }

  831. 

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

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

  834. {

  835.     int ret = 0;

  836.     int log2_diff_max_min_transform_block_size;

  837.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  838.     int i;

  839. 

  840.     // Coded parameters

  841. 

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

  843.     if (sps->vps_id >= HEVC_MAX_VPS_COUNT) {

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

  845.         return AVERROR_INVALIDDATA;

  846.     }

  847. 

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

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

  850.                sps->vps_id);

  851.         return AVERROR_INVALIDDATA;

  852.     }

  853. 

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

  855.     if (sps->max_sub_layers > HEVC_MAX_SUB_LAYERS) {

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

  857.                sps->max_sub_layers);

  858.         return AVERROR_INVALIDDATA;

  859.     }

  860. 

  861.     skip_bits1(gb); // temporal_id_nesting_flag

  862. 

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

  864.         return ret;

  865. 

  866.     *sps_id = get_ue_golomb_long(gb);

  867.     if (*sps_id >= HEVC_MAX_SPS_COUNT) {

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

  869.         return AVERROR_INVALIDDATA;

  870.     }

  871. 

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

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

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

  875.         return AVERROR_INVALIDDATA;

  876.     }

  877. 

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

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

  880. 

  881.     if (sps->separate_colour_plane_flag)

  882.         sps->chroma_format_idc = 0;

  883. 

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

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

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

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

  888.         return ret;

  889. 

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

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

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

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

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

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

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

  897. 

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

  899.             av_log(avctx, AV_LOG_DEBUG,

  900.                    "discarding sps conformance window, "

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

  902.                    sps->pic_conf_win.left_offset,

  903.                    sps->pic_conf_win.right_offset,

  904.                    sps->pic_conf_win.top_offset,

  905.                    sps->pic_conf_win.bottom_offset);

  906. 

  907.             sps->pic_conf_win.left_offset   =

  908.             sps->pic_conf_win.right_offset  =

  909.             sps->pic_conf_win.top_offset    =

  910.             sps->pic_conf_win.bottom_offset = 0;

  911.         }

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

  913.     }

  914. 

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

  916.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  918.         av_log(avctx, AV_LOG_ERROR,

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

  920.                "this is unsupported.\n",

  921.                sps->bit_depth, bit_depth_chroma);

  922.         return AVERROR_INVALIDDATA;

  923.     }

  924. 

  925.     ret = map_pixel_format(avctx, sps);

  926.     if (ret < 0)

  927.         return ret;

  928. 

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

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

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

  932.                sps->log2_max_poc_lsb - 4);

  933.         return AVERROR_INVALIDDATA;

  934.     }

  935. 

  936.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

  942.         if (sps->temporal_layer[i].max_dec_pic_buffering > (unsigned)HEVC_MAX_DPB_SIZE) {

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

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

  945.             return AVERROR_INVALIDDATA;

  946.         }

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

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

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

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

  951.                 sps->temporal_layer[i].num_reorder_pics > HEVC_MAX_DPB_SIZE - 1) {

  952.                 return AVERROR_INVALIDDATA;

  953.             }

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

  955.         }

  956.     }

  957. 

  958.     if (!sublayer_ordering_info) {

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

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

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

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

  963.         }

  964.     }

  965. 

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

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

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

  969.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  970.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  971.                                                sps->log2_min_tb_size;

  972. 

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

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

  975.         return AVERROR_INVALIDDATA;

  976.     }

  977. 

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

  979.         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);

  980.         return AVERROR_INVALIDDATA;

  981.     }

  982. 

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

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

  985.         return AVERROR_INVALIDDATA;

  986.     }

  987. 

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

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

  990.         return AVERROR_INVALIDDATA;

  991.     }

  992. 

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

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

  995. 

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

  997.     if (sps->scaling_list_enable_flag) {

  998.         set_default_scaling_list_data(&sps->scaling_list);

  999. 

  1000.         if (get_bits1(gb)) {

  1001.             ret = scaling_list_data(gb, avctx, &sps->scaling_list, sps);

  1002.             if (ret < 0)

  1003.                 return ret;

  1004.         }

  1005.     }

  1006. 

  1007.     sps->amp_enabled_flag = get_bits1(gb);

  1008.     sps->sao_enabled      = get_bits1(gb);

  1009. 

  1010.     sps->pcm_enabled_flag = get_bits1(gb);

  1011.     if (sps->pcm_enabled_flag) {

  1012.         sps->pcm.bit_depth   = get_bits(gb, 4) + 1;

  1013.         sps->pcm.bit_depth_chroma = get_bits(gb, 4) + 1;

  1014.         sps->pcm.log2_min_pcm_cb_size = get_ue_golomb_long(gb) + 3;

  1015.         sps->pcm.log2_max_pcm_cb_size = sps->pcm.log2_min_pcm_cb_size +

  1016.                                         get_ue_golomb_long(gb);

  1017.         if (sps->pcm.bit_depth > sps->bit_depth) {

  1018.             av_log(avctx, AV_LOG_ERROR,

  1019.                    "PCM bit depth (%d) is greater than normal bit depth (%d)\n",

  1020.                    sps->pcm.bit_depth, sps->bit_depth);

  1021.             return AVERROR_INVALIDDATA;

  1022.         }

  1023. 

  1024.         sps->pcm.loop_filter_disable_flag = get_bits1(gb);

  1025.     }

  1026. 

  1027.     sps->nb_st_rps = get_ue_golomb_long(gb);

  1028.     if (sps->nb_st_rps > HEVC_MAX_SHORT_TERM_RPS_COUNT) {

  1029.         av_log(avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",

  1030.                sps->nb_st_rps);

  1031.         return AVERROR_INVALIDDATA;

  1032.     }

  1033.     for (i = 0; i < sps->nb_st_rps; i++) {

  1034.         if ((ret = ff_hevc_decode_short_term_rps(gb, avctx, &sps->st_rps[i],

  1035.                                                  sps, 0)) < 0)

  1036.             return ret;

  1037.     }

  1038. 

  1039.     sps->long_term_ref_pics_present_flag = get_bits1(gb);

  1040.     if (sps->long_term_ref_pics_present_flag) {

  1041.         sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);

  1042.         if (sps->num_long_term_ref_pics_sps > 31U) {

  1043.             av_log(avctx, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",

  1044.                    sps->num_long_term_ref_pics_sps);

  1045.             return AVERROR_INVALIDDATA;

  1046.         }

  1047.         for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {

  1048.             sps->lt_ref_pic_poc_lsb_sps[i]       = get_bits(gb, sps->log2_max_poc_lsb);

  1049.             sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);

  1050.         }

  1051.     }

  1052. 

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

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

  1055.     sps->vui.sar = (AVRational){0, 1};

  1056.     vui_present = get_bits1(gb);

  1057.     if (vui_present)

  1058.         decode_vui(gb, avctx, apply_defdispwin, sps);

  1059. 

  1060.     if (get_bits1(gb)) { // sps_extension_flag

  1061.         int sps_extension_flag[1];

  1062.         for (i = 0; i < 1; i++)

  1063.             sps_extension_flag[i] = get_bits1(gb);

  1064.         skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);

  1065.         if (sps_extension_flag[0]) {

  1066.             int extended_precision_processing_flag;

  1067.             int high_precision_offsets_enabled_flag;

  1068.             int cabac_bypass_alignment_enabled_flag;

  1069. 

  1070.             sps->transform_skip_rotation_enabled_flag = get_bits1(gb);

  1071.             sps->transform_skip_context_enabled_flag  = get_bits1(gb);

  1072.             sps->implicit_rdpcm_enabled_flag = get_bits1(gb);

  1073. 

  1074.             sps->explicit_rdpcm_enabled_flag = get_bits1(gb);

  1075. 

  1076.             extended_precision_processing_flag = get_bits1(gb);

  1077.             if (extended_precision_processing_flag)

  1078.                 av_log(avctx, AV_LOG_WARNING,

  1079.                    "extended_precision_processing_flag not yet implemented\n");

  1080. 

  1081.             sps->intra_smoothing_disabled_flag       = get_bits1(gb);

  1082.             high_precision_offsets_enabled_flag  = get_bits1(gb);

  1083.             if (high_precision_offsets_enabled_flag)

  1084.                 av_log(avctx, AV_LOG_WARNING,

  1085.                    "high_precision_offsets_enabled_flag not yet implemented\n");

  1086. 

  1087.             sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);

  1088. 

  1089.             cabac_bypass_alignment_enabled_flag  = get_bits1(gb);

  1090.             if (cabac_bypass_alignment_enabled_flag)

  1091.                 av_log(avctx, AV_LOG_WARNING,

  1092.                    "cabac_bypass_alignment_enabled_flag not yet implemented\n");

  1093.         }

  1094.     }

  1095.     if (apply_defdispwin) {

  1096.         sps->output_window.left_offset   += sps->vui.def_disp_win.left_offset;

  1097.         sps->output_window.right_offset  += sps->vui.def_disp_win.right_offset;

  1098.         sps->output_window.top_offset    += sps->vui.def_disp_win.top_offset;

  1099.         sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

  1100.     }

  1101.     if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) &&

  1102.         !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {

  1103.         sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));

  1104.         av_log(avctx, AV_LOG_WARNING, "Reducing left output window to %d "

  1105.                "chroma samples to preserve alignment.\n",

  1106.                sps->output_window.left_offset);

  1107.     }

  1108.     sps->output_width  = sps->width -

  1109.                          (sps->output_window.left_offset + sps->output_window.right_offset);

  1110.     sps->output_height = sps->height -

  1111.                          (sps->output_window.top_offset + sps->output_window.bottom_offset);

  1112.     if (sps->width  <= sps->output_window.left_offset + (int64_t)sps->output_window.right_offset  ||

  1113.         sps->height <= sps->output_window.top_offset  + (int64_t)sps->output_window.bottom_offset) {

  1114.         av_log(avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",

  1115.                sps->output_width, sps->output_height);

  1116.         if (avctx->err_recognition & AV_EF_EXPLODE) {

  1117.             return AVERROR_INVALIDDATA;

  1118.         }

  1119.         av_log(avctx, AV_LOG_WARNING,

  1120.                "Displaying the whole video surface.\n");

  1121.         memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));

  1122.         memset(&sps->output_window, 0, sizeof(sps->output_window));

  1123.         sps->output_width               = sps->width;

  1124.         sps->output_height              = sps->height;

  1125.     }

  1126. 

  1127.     // Inferred parameters

  1128.     sps->log2_ctb_size = sps->log2_min_cb_size +

  1129.                          sps->log2_diff_max_min_coding_block_size;

  1130.     sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

  1131. 

  1132.     if (sps->log2_ctb_size > HEVC_MAX_LOG2_CTB_SIZE) {

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

  1134.         return AVERROR_INVALIDDATA;

  1135.     }

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

  1137.         av_log(avctx,

  1138.                AV_LOG_ERROR,

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

  1140.                sps->log2_ctb_size);

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

  1142.         return AVERROR_INVALIDDATA;

  1143.     }

  1144. 

  1145.     sps->ctb_width  = (sps->width  + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1146.     sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1147.     sps->ctb_size   = sps->ctb_width * sps->ctb_height;

  1148. 

  1149.     sps->min_cb_width  = sps->width  >> sps->log2_min_cb_size;

  1150.     sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

  1151.     sps->min_tb_width  = sps->width  >> sps->log2_min_tb_size;

  1152.     sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

  1153.     sps->min_pu_width  = sps->width  >> sps->log2_min_pu_size;

  1154.     sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

  1155.     sps->tb_mask       = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;

  1156. 

  1157.     sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

  1158. 

  1159.     if (av_mod_uintp2(sps->width, sps->log2_min_cb_size) ||

  1160.         av_mod_uintp2(sps->height, sps->log2_min_cb_size)) {

  1161.         av_log(avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  1162.         return AVERROR_INVALIDDATA;

  1163.     }

  1164. 

  1165.     if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1166.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

  1167.                sps->max_transform_hierarchy_depth_inter);

  1168.         return AVERROR_INVALIDDATA;

  1169.     }

  1170.     if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1171.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  1172.                sps->max_transform_hierarchy_depth_intra);

  1173.         return AVERROR_INVALIDDATA;

  1174.     }

  1175.     if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

  1176.         av_log(avctx, AV_LOG_ERROR,

  1177.                "max transform block size out of range: %d\n",

  1178.                sps->log2_max_trafo_size);

  1179.         return AVERROR_INVALIDDATA;

  1180.     }

  1181. 

  1182.     if (get_bits_left(gb) < 0) {

  1183.         av_log(avctx, AV_LOG_ERROR,

  1184.                "Overread SPS by %d bits\n", -get_bits_left(gb));

  1185.         return AVERROR_INVALIDDATA;

  1186.     }

  1187. 

  1188.     return 0;

  1189. }

  1190. 

  1191. int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,

  1192.                            HEVCParamSets *ps, int apply_defdispwin)

  1193. {

  1194.     HEVCSPS *sps;

  1195.     AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));

  1196.     unsigned int sps_id;

  1197.     int ret;

  1198.     ptrdiff_t nal_size;

  1199. 

  1200.     if (!sps_buf)

  1201.         return AVERROR(ENOMEM);

  1202.     sps = (HEVCSPS*)sps_buf->data;

  1203. 

  1204.     av_log(avctx, AV_LOG_DEBUG, "Decoding SPS\n");

  1205. 

  1206.     nal_size = gb->buffer_end - gb->buffer;

  1207.     if (nal_size > sizeof(sps->data)) {

  1208.         av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS "

  1209.                "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",

  1210.                nal_size, sizeof(sps->data));

  1211.         sps->data_size = sizeof(sps->data);

  1212.     } else {

  1213.         sps->data_size = nal_size;

  1214.     }

  1215.     memcpy(sps->data, gb->buffer, sps->data_size);

  1216. 

  1217.     ret = ff_hevc_parse_sps(sps, gb, &sps_id,

  1218.                             apply_defdispwin,

  1219.                             ps->vps_list, avctx);

  1220.     if (ret < 0) {

  1221.         av_buffer_unref(&sps_buf);

  1222.         return ret;

  1223.     }

  1224. 

  1225.     if (avctx->debug & FF_DEBUG_BITSTREAM) {

  1226.         av_log(avctx, AV_LOG_DEBUG,

  1227.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1228.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1229.                sps_id, sps->width, sps->height,

  1230.                sps->output_width, sps->output_height,

  1231.                av_get_pix_fmt_name(sps->pix_fmt));

  1232.     }

  1233. 

  1234.     /* check if this is a repeat of an already parsed SPS, then keep the

  1235.      * original one.

  1236.      * otherwise drop all PPSes that depend on it */

  1237.     if (ps->sps_list[sps_id] &&

  1238.         !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1239.         av_buffer_unref(&sps_buf);

  1240.     } else {

  1241.         remove_sps(ps, sps_id);

  1242.         ps->sps_list[sps_id] = sps_buf;

  1243.     }

  1244. 

  1245.     return 0;

  1246. }

  1247. 

  1248. static void hevc_pps_free(void *opaque, uint8_t *data)

  1249. {

  1250.     HEVCPPS *pps = (HEVCPPS*)data;

  1251. 

  1252.     av_freep(&pps->column_width);

  1253.     av_freep(&pps->row_height);

  1254.     av_freep(&pps->col_bd);

  1255.     av_freep(&pps->row_bd);

  1256.     av_freep(&pps->col_idxX);

  1257.     av_freep(&pps->ctb_addr_rs_to_ts);

  1258.     av_freep(&pps->ctb_addr_ts_to_rs);

  1259.     av_freep(&pps->tile_pos_rs);

  1260.     av_freep(&pps->tile_id);

  1261.     av_freep(&pps->min_tb_addr_zs_tab);

  1262. 

  1263.     av_freep(&pps);

  1264. }

  1265. 

  1266. static int pps_range_extensions(GetBitContext *gb, AVCodecContext *avctx,

  1267.                                 HEVCPPS *pps, HEVCSPS *sps) {

  1268.     int i;

  1269. 

  1270.     if (pps->transform_skip_enabled_flag) {

  1271.         pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;

  1272.     }

  1273.     pps->cross_component_prediction_enabled_flag = get_bits1(gb);

  1274.     pps->chroma_qp_offset_list_enabled_flag = get_bits1(gb);

  1275.     if (pps->chroma_qp_offset_list_enabled_flag) {

  1276.         pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);

  1277.         pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);

  1278.         if (pps->chroma_qp_offset_list_len_minus1 && pps->chroma_qp_offset_list_len_minus1 >= 5) {

  1279.             av_log(avctx, AV_LOG_ERROR,

  1280.                    "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");

  1281.             return AVERROR_INVALIDDATA;

  1282.         }

  1283.         for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {

  1284.             pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);

  1285.             if (pps->cb_qp_offset_list[i]) {

  1286.                 av_log(avctx, AV_LOG_WARNING,

  1287.                        "cb_qp_offset_list not tested yet.\n");

  1288.             }

  1289.             pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);

  1290.             if (pps->cr_qp_offset_list[i]) {

  1291.                 av_log(avctx, AV_LOG_WARNING,

  1292.                        "cb_qp_offset_list not tested yet.\n");

  1293.             }

  1294.         }

  1295.     }

  1296.     pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);

  1297.     pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);

  1298. 

  1299.     return(0);

  1300. }

  1301. 

  1302. static inline int setup_pps(AVCodecContext *avctx, GetBitContext *gb,

  1303.                             HEVCPPS *pps, HEVCSPS *sps)

  1304. {

  1305.     int log2_diff;

  1306.     int pic_area_in_ctbs;

  1307.     int i, j, x, y, ctb_addr_rs, tile_id;

  1308. 

  1309.     // Inferred parameters

  1310.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1311.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1312.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1313.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX)

  1314.         return AVERROR(ENOMEM);

  1315. 

  1316.     if (pps->uniform_spacing_flag) {

  1317.         if (!pps->column_width) {

  1318.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1319.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1320.         }

  1321.         if (!pps->column_width || !pps->row_height)

  1322.             return AVERROR(ENOMEM);

  1323. 

  1324.         for (i = 0; i < pps->num_tile_columns; i++) {

  1325.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1326.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1327.         }

  1328. 

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

  1330.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1331.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1332.         }

  1333.     }

  1334. 

  1335.     pps->col_bd[0] = 0;

  1336.     for (i = 0; i < pps->num_tile_columns; i++)

  1337.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1338. 

  1339.     pps->row_bd[0] = 0;

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

  1341.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1342. 

  1343.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1344.         if (i > pps->col_bd[j])

  1345.             j++;

  1346.         pps->col_idxX[i] = j;

  1347.     }

  1348. 

  1349.     /**

  1350.      * 6.5

  1351.      */

  1352.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1353. 

  1354.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1355.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1356.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1357.     pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));

  1358.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1359.         !pps->tile_id || !pps->min_tb_addr_zs_tab) {

  1360.         return AVERROR(ENOMEM);

  1361.     }

  1362. 

  1363.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1364.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1365.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1366.         int tile_x = 0;

  1367.         int tile_y = 0;

  1368.         int val    = 0;

  1369. 

  1370.         for (i = 0; i < pps->num_tile_columns; i++) {

  1371.             if (tb_x < pps->col_bd[i + 1]) {

  1372.                 tile_x = i;

  1373.                 break;

  1374.             }

  1375.         }

  1376. 

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

  1378.             if (tb_y < pps->row_bd[i + 1]) {

  1379.                 tile_y = i;

  1380.                 break;

  1381.             }

  1382.         }

  1383. 

  1384.         for (i = 0; i < tile_x; i++)

  1385.             val += pps->row_height[tile_y] * pps->column_width[i];

  1386.         for (i = 0; i < tile_y; i++)

  1387.             val += sps->ctb_width * pps->row_height[i];

  1388. 

  1389.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1390.                tb_x - pps->col_bd[tile_x];

  1391. 

  1392.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1393.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1394.     }

  1395. 

  1396.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1397.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1398.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1399.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1400.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1401. 

  1402.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1403.     if (!pps->tile_pos_rs)

  1404.         return AVERROR(ENOMEM);

  1405. 

  1406.     for (j = 0; j < pps->num_tile_rows; j++)

  1407.         for (i = 0; i < pps->num_tile_columns; i++)

  1408.             pps->tile_pos_rs[j * pps->num_tile_columns + i] =

  1409.                 pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1410. 

  1411.     log2_diff = sps->log2_ctb_size - sps->log2_min_tb_size;

  1412.     pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];

  1413.     for (y = 0; y < sps->tb_mask+2; y++) {

  1414.         pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;

  1415.         pps->min_tb_addr_zs_tab[y]    = -1;

  1416.     }

  1417.     for (y = 0; y < sps->tb_mask+1; y++) {

  1418.         for (x = 0; x < sps->tb_mask+1; x++) {

  1419.             int tb_x = x >> log2_diff;

  1420.             int tb_y = y >> log2_diff;

  1421.             int rs   = sps->ctb_width * tb_y + tb_x;

  1422.             int val  = pps->ctb_addr_rs_to_ts[rs] << (log2_diff * 2);

  1423.             for (i = 0; i < log2_diff; i++) {

  1424.                 int m = 1 << i;

  1425.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1426.             }

  1427.             pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;

  1428.         }

  1429.     }

  1430. 

  1431.     return 0;

  1432. }

  1433. 

  1434. int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,

  1435.                            HEVCParamSets *ps)

  1436. {

  1437.     HEVCSPS      *sps = NULL;

  1438.     int i, ret = 0;

  1439.     unsigned int pps_id = 0;

  1440.     ptrdiff_t nal_size;

  1441. 

  1442.     AVBufferRef *pps_buf;

  1443.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1444. 

  1445.     if (!pps)

  1446.         return AVERROR(ENOMEM);

  1447. 

  1448.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1449.                                hevc_pps_free, NULL, 0);

  1450.     if (!pps_buf) {

  1451.         av_freep(&pps);

  1452.         return AVERROR(ENOMEM);

  1453.     }

  1454. 

  1455.     av_log(avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1456. 

  1457.     nal_size = gb->buffer_end - gb->buffer;

  1458.     if (nal_size > sizeof(pps->data)) {

  1459.         av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "

  1460.                "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",

  1461.                nal_size, sizeof(pps->data));

  1462.         pps->data_size = sizeof(pps->data);

  1463.     } else {

  1464.         pps->data_size = nal_size;

  1465.     }

  1466.     memcpy(pps->data, gb->buffer, pps->data_size);

  1467. 

  1468.     // Default values

  1469.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1470.     pps->num_tile_columns                      = 1;

  1471.     pps->num_tile_rows                         = 1;

  1472.     pps->uniform_spacing_flag                  = 1;

  1473.     pps->disable_dbf                           = 0;

  1474.     pps->beta_offset                           = 0;

  1475.     pps->tc_offset                             = 0;

  1476.     pps->log2_max_transform_skip_block_size    = 2;

  1477. 

  1478.     // Coded parameters

  1479.     pps_id = get_ue_golomb_long(gb);

  1480.     if (pps_id >= HEVC_MAX_PPS_COUNT) {

  1481.         av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1482.         ret = AVERROR_INVALIDDATA;

  1483.         goto err;

  1484.     }

  1485.     pps->sps_id = get_ue_golomb_long(gb);

  1486.     if (pps->sps_id >= HEVC_MAX_SPS_COUNT) {

  1487.         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1488.         ret = AVERROR_INVALIDDATA;

  1489.         goto err;

  1490.     }

  1491.     if (!ps->sps_list[pps->sps_id]) {

  1492.         av_log(avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1493.         ret = AVERROR_INVALIDDATA;

  1494.         goto err;

  1495.     }

  1496.     sps = (HEVCSPS *)ps->sps_list[pps->sps_id]->data;

  1497. 

  1498.     pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

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

  1500.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1501. 

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

  1503. 

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

  1505. 

  1506.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1507.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1508. 

  1509.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1510. 

  1511.     pps->constrained_intra_pred_flag = get_bits1(gb);

  1512.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1513. 

  1514.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1515.     pps->diff_cu_qp_delta_depth   = 0;

  1516.     if (pps->cu_qp_delta_enabled_flag)

  1517.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1518. 

  1519.     if (pps->diff_cu_qp_delta_depth < 0 ||

  1520.         pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {

  1521.         av_log(avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",

  1522.                pps->diff_cu_qp_delta_depth);

  1523.         ret = AVERROR_INVALIDDATA;

  1524.         goto err;

  1525.     }

  1526. 

  1527.     pps->cb_qp_offset = get_se_golomb(gb);

  1528.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1529.         av_log(avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1530.                pps->cb_qp_offset);

  1531.         ret = AVERROR_INVALIDDATA;

  1532.         goto err;

  1533.     }

  1534.     pps->cr_qp_offset = get_se_golomb(gb);

  1535.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1536.         av_log(avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1537.                pps->cr_qp_offset);

  1538.         ret = AVERROR_INVALIDDATA;

  1539.         goto err;

  1540.     }

  1541.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1542. 

  1543.     pps->weighted_pred_flag   = get_bits1(gb);

  1544.     pps->weighted_bipred_flag = get_bits1(gb);

  1545. 

  1546.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1547.     pps->tiles_enabled_flag               = get_bits1(gb);

  1548.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1549. 

  1550.     if (pps->tiles_enabled_flag) {

  1551.         pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

  1552.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

  1553.         if (pps->num_tile_columns <= 0 ||

  1554.             pps->num_tile_columns >= sps->width) {

  1555.             av_log(avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1556.                    pps->num_tile_columns - 1);

  1557.             ret = AVERROR_INVALIDDATA;

  1558.             goto err;

  1559.         }

  1560.         if (pps->num_tile_rows <= 0 ||

  1561.             pps->num_tile_rows >= sps->height) {

  1562.             av_log(avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1563.                    pps->num_tile_rows - 1);

  1564.             ret = AVERROR_INVALIDDATA;

  1565.             goto err;

  1566.         }

  1567. 

  1568.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1569.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1570.         if (!pps->column_width || !pps->row_height) {

  1571.             ret = AVERROR(ENOMEM);

  1572.             goto err;

  1573.         }

  1574. 

  1575.         pps->uniform_spacing_flag = get_bits1(gb);

  1576.         if (!pps->uniform_spacing_flag) {

  1577.             uint64_t sum = 0;

  1578.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1579.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1580.                 sum                 += pps->column_width[i];

  1581.             }

  1582.             if (sum >= sps->ctb_width) {

  1583.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1584.                 ret = AVERROR_INVALIDDATA;

  1585.                 goto err;

  1586.             }

  1587.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1588. 

  1589.             sum = 0;

  1590.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1591.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1592.                 sum               += pps->row_height[i];

  1593.             }

  1594.             if (sum >= sps->ctb_height) {

  1595.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1596.                 ret = AVERROR_INVALIDDATA;

  1597.                 goto err;

  1598.             }

  1599.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1600.         }

  1601.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1602.     }

  1603. 

  1604.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1605. 

  1606.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1607.     if (pps->deblocking_filter_control_present_flag) {

  1608.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1609.         pps->disable_dbf                             = get_bits1(gb);

  1610.         if (!pps->disable_dbf) {

  1611.             pps->beta_offset = get_se_golomb(gb) * 2;

  1612.             pps->tc_offset = get_se_golomb(gb) * 2;

  1613.             if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

  1614.                 av_log(avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1615.                        pps->beta_offset/2);

  1616.                 ret = AVERROR_INVALIDDATA;

  1617.                 goto err;

  1618.             }

  1619.             if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

  1620.                 av_log(avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1621.                        pps->tc_offset/2);

  1622.                 ret = AVERROR_INVALIDDATA;

  1623.                 goto err;

  1624.             }

  1625.         }

  1626.     }

  1627. 

  1628.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1629.     if (pps->scaling_list_data_present_flag) {

  1630.         set_default_scaling_list_data(&pps->scaling_list);

  1631.         ret = scaling_list_data(gb, avctx, &pps->scaling_list, sps);

  1632.         if (ret < 0)

  1633.             goto err;

  1634.     }

  1635.     pps->lists_modification_present_flag = get_bits1(gb);

  1636.     pps->log2_parallel_merge_level       = get_ue_golomb_long(gb) + 2;

  1637.     if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {

  1638.         av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1639.                pps->log2_parallel_merge_level - 2);

  1640.         ret = AVERROR_INVALIDDATA;

  1641.         goto err;

  1642.     }

  1643. 

  1644.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1645. 

  1646.     if (get_bits1(gb)) { // pps_extension_present_flag

  1647.         int pps_range_extensions_flag = get_bits1(gb);

  1648.         /* int pps_extension_7bits = */ get_bits(gb, 7);

  1649.         if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {

  1650.             if ((ret = pps_range_extensions(gb, avctx, pps, sps)) < 0)

  1651.                 goto err;

  1652.         }

  1653.     }

  1654. 

  1655.     ret = setup_pps(avctx, gb, pps, sps);

  1656.     if (ret < 0)

  1657.         goto err;

  1658. 

  1659.     if (get_bits_left(gb) < 0) {

  1660.         av_log(avctx, AV_LOG_ERROR,

  1661.                "Overread PPS by %d bits\n", -get_bits_left(gb));

  1662.         goto err;

  1663.     }

  1664. 

  1665.     remove_pps(ps, pps_id);

  1666.     ps->pps_list[pps_id] = pps_buf;

  1667. 

  1668.     return 0;

  1669. 

  1670. err:

  1671.     av_buffer_unref(&pps_buf);

  1672.     return ret;

  1673. }