falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82821 Commits
32 Branches
312MB
Tree: 55776eae21
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '55776eae21'
${ noResults }
FFmpeg/libavcodec/hevc_ps.c

1691 lines
64KB
Raw Blame History 

  1. /*

  2.  * HEVC Parameter Set decoding

  3.  *

  4.  * Copyright (C) 2012 - 2103 Guillaume Martres

  5.  * Copyright (C) 2012 - 2103 Mickael Raulet

  6.  * Copyright (C) 2012 - 2013 Gildas Cocherel

  7.  * Copyright (C) 2013 Vittorio Giovara

  8.  *

  9.  * This file is part of FFmpeg.

  10.  *

  11.  * FFmpeg is free software; you can redistribute it and/or

  12.  * modify it under the terms of the GNU Lesser General Public

  13.  * License as published by the Free Software Foundation; either

  14.  * version 2.1 of the License, or (at your option) any later version.

  15.  *

  16.  * FFmpeg is distributed in the hope that it will be useful,

  17.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  18.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  19.  * Lesser General Public License for more details.

  20.  *

  21.  * You should have received a copy of the GNU Lesser General Public

  22.  * License along with FFmpeg; if not, write to the Free Software

  23.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  24.  */

  25. 

  26. #include "libavutil/imgutils.h"

  27. #include "golomb.h"

  28. #include "hevc.h"

  29. 

  30. static const uint8_t default_scaling_list_intra[] = {

  31.     16, 16, 16, 16, 17, 18, 21, 24,

  32.     16, 16, 16, 16, 17, 19, 22, 25,

  33.     16, 16, 17, 18, 20, 22, 25, 29,

  34.     16, 16, 18, 21, 24, 27, 31, 36,

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

  36.     18, 19, 22, 27, 35, 44, 54, 65,

  37.     21, 22, 25, 31, 41, 54, 70, 88,

  38.     24, 25, 29, 36, 47, 65, 88, 115

  39. };

  40. 

  41. static const uint8_t default_scaling_list_inter[] = {

  42.     16, 16, 16, 16, 17, 18, 20, 24,

  43.     16, 16, 16, 17, 18, 20, 24, 25,

  44.     16, 16, 17, 18, 20, 24, 25, 28,

  45.     16, 17, 18, 20, 24, 25, 28, 33,

  46.     17, 18, 20, 24, 25, 28, 33, 41,

  47.     18, 20, 24, 25, 28, 33, 41, 54,

  48.     20, 24, 25, 28, 33, 41, 54, 71,

  49.     24, 25, 28, 33, 41, 54, 71, 91

  50. };

  51. 

  52. static const AVRational vui_sar[] = {

  53.     {  0,   1 },

  54.     {  1,   1 },

  55.     { 12,  11 },

  56.     { 10,  11 },

  57.     { 16,  11 },

  58.     { 40,  33 },

  59.     { 24,  11 },

  60.     { 20,  11 },

  61.     { 32,  11 },

  62.     { 80,  33 },

  63.     { 18,  11 },

  64.     { 15,  11 },

  65.     { 64,  33 },

  66.     { 160, 99 },

  67.     {  4,   3 },

  68.     {  3,   2 },

  69.     {  2,   1 },

  70. };

  71. 

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

  73. {

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

  75.         s->pps = NULL;

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

  77. }

  78. 

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

  80. {

  81.     int i;

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

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

  84.             s->sps = NULL;

  85. 

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

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

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

  89.                 remove_pps(s, i);

  90. 

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

  92.     }

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

  94. }

  95. 

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

  97. {

  98.     int i;

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

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

  101.             s->vps = NULL;

  102. 

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

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

  105.                 remove_sps(s, i);

  106.     }

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

  108. }

  109. 

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

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

  112. {

  113.     uint8_t rps_predict = 0;

  114.     int delta_poc;

  115.     int k0 = 0;

  116.     int k1 = 0;

  117.     int k  = 0;

  118.     int i;

  119. 

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

  121.         rps_predict = get_bits1(gb);

  122. 

  123.     if (rps_predict) {

  124.         const ShortTermRPS *rps_ridx;

  125.         int delta_rps;

  126.         unsigned abs_delta_rps;

  127.         uint8_t use_delta_flag = 0;

  128.         uint8_t delta_rps_sign;

  129. 

  130.         if (is_slice_header) {

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

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

  133.                 av_log(avctx, AV_LOG_ERROR,

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

  135.                        delta_idx, sps->nb_st_rps);

  136.                 return AVERROR_INVALIDDATA;

  137.             }

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

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

  140.         } else

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

  142. 

  143.         delta_rps_sign = get_bits1(gb);

  144.         abs_delta_rps  = get_ue_golomb_long(gb) + 1;

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

  146.             av_log(avctx, AV_LOG_ERROR,

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

  148.                    abs_delta_rps);

  149.             return AVERROR_INVALIDDATA;

  150.         }

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

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

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

  154. 

  155.             if (!used)

  156.                 use_delta_flag = get_bits1(gb);

  157. 

  158.             if (used || use_delta_flag) {

  159.                 if (i < rps_ridx->num_delta_pocs)

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

  161.                 else

  162.                     delta_poc = delta_rps;

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

  164.                 if (delta_poc < 0)

  165.                     k0++;

  166.                 else

  167.                     k1++;

  168.                 k++;

  169.             }

  170.         }

  171. 

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

  173.             av_log(avctx, AV_LOG_ERROR,

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

  175.             return AVERROR_INVALIDDATA;

  176.         }

  177. 

  178.         rps->num_delta_pocs    = k;

  179.         rps->num_negative_pics = k0;

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

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

  182.             int used, tmp;

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

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

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

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

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

  188.                     if (delta_poc < tmp) {

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

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

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

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

  193.                     }

  194.                 }

  195.             }

  196.         }

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

  198.             int used;

  199.             k = rps->num_negative_pics - 1;

  200.             // flip the negative values to largest first

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

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

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

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

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

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

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

  208.                 k--;

  209.             }

  210.         }

  211.     } else {

  212.         unsigned int prev, nb_positive_pics;

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

  214.         nb_positive_pics       = get_ue_golomb_long(gb);

  215. 

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

  217.             nb_positive_pics >= MAX_REFS) {

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

  219.             return AVERROR_INVALIDDATA;

  220.         }

  221. 

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

  223.         if (rps->num_delta_pocs) {

  224.             prev = 0;

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

  226.                 delta_poc = get_ue_golomb_long(gb) + 1;

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

  228.                     av_log(avctx, AV_LOG_ERROR,

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

  230.                         delta_poc);

  231.                     return AVERROR_INVALIDDATA;

  232.                 }

  233.                 prev -= delta_poc;

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

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

  236.             }

  237.             prev = 0;

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

  239.                 delta_poc = get_ue_golomb_long(gb) + 1;

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

  241.                     av_log(avctx, AV_LOG_ERROR,

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

  243.                         delta_poc);

  244.                     return AVERROR_INVALIDDATA;

  245.                 }

  246.                 prev += delta_poc;

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

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

  249.             }

  250.         }

  251.     }

  252.     return 0;

  253. }

  254. 

  255. 

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

  257.                                       PTLCommon *ptl)

  258. {

  259.     int i;

  260. 

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

  262.         return -1;

  263. 

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

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

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

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

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

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

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

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

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

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

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

  275.     else

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

  277. 

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

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

  280. 

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

  282.             ptl->profile_idc = i;

  283.     }

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

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

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

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

  288. 

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

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

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

  292. 

  293.     return 0;

  294. }

  295. 

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

  297.                       PTL *ptl, int max_num_sub_layers)

  298. {

  299.     int i;

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

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

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

  303.         return -1;

  304.     }

  305. 

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

  307. 

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

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

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

  311.     }

  312. 

  313.     if (max_num_sub_layers - 1> 0)

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

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

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

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

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

  319.             av_log(avctx, AV_LOG_ERROR,

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

  321.             return -1;

  322.         }

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

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

  325.                 av_log(avctx, AV_LOG_ERROR,

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

  327.                 return -1;

  328.             } else

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

  330.         }

  331.     }

  332. 

  333.     return 0;

  334. }

  335. 

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

  337.                                 int subpic_params_present)

  338. {

  339.     int i;

  340. 

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

  342.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  343.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  344. 

  345.         if (subpic_params_present) {

  346.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  347.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  348.         }

  349.         skip_bits1(gb); // cbr_flag

  350.     }

  351. }

  352. 

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

  354.                        int max_sublayers)

  355. {

  356.     int nal_params_present = 0, vcl_params_present = 0;

  357.     int subpic_params_present = 0;

  358.     int i;

  359. 

  360.     if (common_inf_present) {

  361.         nal_params_present = get_bits1(gb);

  362.         vcl_params_present = get_bits1(gb);

  363. 

  364.         if (nal_params_present || vcl_params_present) {

  365.             subpic_params_present = get_bits1(gb);

  366. 

  367.             if (subpic_params_present) {

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

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

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

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

  372.             }

  373. 

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

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

  376. 

  377.             if (subpic_params_present)

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

  379. 

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

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

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

  383.         }

  384.     }

  385. 

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

  387.         int low_delay = 0;

  388.         unsigned int nb_cpb = 1;

  389.         int fixed_rate = get_bits1(gb);

  390. 

  391.         if (!fixed_rate)

  392.             fixed_rate = get_bits1(gb);

  393. 

  394.         if (fixed_rate)

  395.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  396.         else

  397.             low_delay = get_bits1(gb);

  398. 

  399.         if (!low_delay) {

  400.             nb_cpb = get_ue_golomb_long(gb) + 1;

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

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

  403.                 return AVERROR_INVALIDDATA;

  404.             }

  405.         }

  406. 

  407.         if (nal_params_present)

  408.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  409.         if (vcl_params_present)

  410.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  411.     }

  412.     return 0;

  413. }

  414. 

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

  416.                            HEVCParamSets *ps)

  417. {

  418.     int i,j;

  419.     int vps_id = 0;

  420.     ptrdiff_t nal_size;

  421.     HEVCVPS *vps;

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

  423. 

  424.     if (!vps_buf)

  425.         return AVERROR(ENOMEM);

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

  427. 

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

  429. 

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

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

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

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

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

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

  436.     } else {

  437.         vps->data_size = nal_size;

  438.     }

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

  440. 

  441.     vps_id = get_bits(gb, 4);

  442.     if (vps_id >= MAX_VPS_COUNT) {

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

  444.         goto err;

  445.     }

  446. 

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

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

  449.         goto err;

  450.     }

  451. 

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

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

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

  455. 

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

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

  458.         goto err;

  459.     }

  460. 

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

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

  463.                vps->vps_max_sub_layers);

  464.         goto err;

  465.     }

  466. 

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

  468.         goto err;

  469. 

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

  471. 

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

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

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

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

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

  477. 

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

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

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

  481.             goto err;

  482.         }

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

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

  485.                    vps->vps_num_reorder_pics[i]);

  486.             if (avctx->err_recognition & AV_EF_EXPLODE)

  487.                 goto err;

  488.         }

  489.     }

  490. 

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

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

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

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

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

  496.         goto err;

  497.     }

  498. 

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

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

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

  502. 

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

  504.     if (vps->vps_timing_info_present_flag) {

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

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

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

  508.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  512.             av_log(avctx, AV_LOG_ERROR,

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

  514.             goto err;

  515.         }

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

  517.             int common_inf_present = 1;

  518. 

  519.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  520.             if (i)

  521.                 common_inf_present = get_bits1(gb);

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

  523.         }

  524.     }

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

  526. 

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

  528.         av_log(avctx, AV_LOG_ERROR,

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

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

  531.             goto err;

  532.     }

  533. 

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

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

  536.         av_buffer_unref(&vps_buf);

  537.     } else {

  538.         remove_vps(ps, vps_id);

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

  540.     }

  541. 

  542.     return 0;

  543. 

  544. err:

  545.     av_buffer_unref(&vps_buf);

  546.     return AVERROR_INVALIDDATA;

  547. }

  548. 

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

  550.                        int apply_defdispwin, HEVCSPS *sps)

  551. {

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

  553.     GetBitContext backup;

  554.     int sar_present, alt = 0;

  555. 

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

  557. 

  558.     sar_present = get_bits1(gb);

  559.     if (sar_present) {

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

  561.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  563.         else if (sar_idx == 255) {

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

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

  566.         } else

  567.             av_log(avctx, AV_LOG_WARNING,

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

  569.     }

  570. 

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

  572.     if (vui->overscan_info_present_flag)

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

  574. 

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

  576.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  581.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  582.         if (vui->colour_description_present_flag) {

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

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

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

  586. 

  587.             // Set invalid values to "unspecified"

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

  589.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  591.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  593.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

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

  595.                 switch (sps->pix_fmt) {

  596.                 case AV_PIX_FMT_YUV444P:

  597.                     sps->pix_fmt = AV_PIX_FMT_GBRP;

  598.                     break;

  599.                 case AV_PIX_FMT_YUV444P10:

  600.                     sps->pix_fmt = AV_PIX_FMT_GBRP10;

  601.                     break;

  602.                 case AV_PIX_FMT_YUV444P12:

  603.                     sps->pix_fmt = AV_PIX_FMT_GBRP12;

  604.                     break;

  605.                 }

  606.             }

  607.         }

  608.     }

  609. 

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

  611.     if (vui->chroma_loc_info_present_flag) {

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

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

  614.     }

  615. 

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

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

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

  619. 

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

  621.         vui->default_display_window_flag = 0;

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

  623.     } else

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

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

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

  627. 

  628.     if (vui->default_display_window_flag) {

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

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

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

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

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

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

  635. 

  636.         if (apply_defdispwin &&

  637.             avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {

  638.             av_log(avctx, AV_LOG_DEBUG,

  639.                    "discarding vui default display window, "

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

  641.                    vui->def_disp_win.left_offset,

  642.                    vui->def_disp_win.right_offset,

  643.                    vui->def_disp_win.top_offset,

  644.                    vui->def_disp_win.bottom_offset);

  645. 

  646.             vui->def_disp_win.left_offset   =

  647.             vui->def_disp_win.right_offset  =

  648.             vui->def_disp_win.top_offset    =

  649.             vui->def_disp_win.bottom_offset = 0;

  650.         }

  651.     }

  652. 

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

  654. 

  655.     if (vui->vui_timing_info_present_flag) {

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

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

  658.             // at where def_disp_win is normally located

  659.             av_log(avctx, AV_LOG_WARNING,

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

  661.             vui->default_display_window_flag = 0;

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

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

  664.             alt = 1;

  665.         }

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

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

  668.         if (alt) {

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

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

  671.         }

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

  673.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  676.         if (vui->vui_hrd_parameters_present_flag)

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

  678.     }

  679. 

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

  681.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  690.     }

  691. }

  692. 

  693. static void set_default_scaling_list_data(ScalingList *sl)

  694. {

  695.     int matrixId;

  696. 

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

  698.         // 4x4 default is 16

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

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

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

  702.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  721. }

  722. 

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

  724. {

  725.     uint8_t scaling_list_pred_mode_flag;

  726.     int32_t scaling_list_dc_coef[2][6];

  727.     int size_id, matrix_id, pos;

  728.     int i;

  729. 

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

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

  732.             scaling_list_pred_mode_flag = get_bits1(gb);

  733.             if (!scaling_list_pred_mode_flag) {

  734.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  737.                 if (delta) {

  738.                     // Copy from previous array.

  739.                     if (matrix_id < delta) {

  740.                         av_log(avctx, AV_LOG_ERROR,

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

  742.                         return AVERROR_INVALIDDATA;

  743.                     }

  744. 

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

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

  747.                            size_id > 0 ? 64 : 16);

  748.                     if (size_id > 1)

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

  750.                 }

  751.             } else {

  752.                 int next_coef, coef_num;

  753.                 int32_t scaling_list_delta_coef;

  754. 

  755.                 next_coef = 8;

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

  757.                 if (size_id > 1) {

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

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

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

  761.                 }

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

  763.                     if (size_id == 0)

  764.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  765.                                   ff_hevc_diag_scan4x4_x[i];

  766.                     else

  767.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  768.                                   ff_hevc_diag_scan8x8_x[i];

  769. 

  770.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  773.                 }

  774.             }

  775.         }

  776. 

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

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

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

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

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

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

  783.         }

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

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

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

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

  788.     }

  789. 

  790. 

  791.     return 0;

  792. }

  793. 

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

  795. {

  796.     const AVPixFmtDescriptor *desc;

  797.     switch (sps->bit_depth) {

  798.     case 8:

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

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

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

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

  803.        break;

  804.     case 9:

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

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

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

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

  809.         break;

  810.     case 10:

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

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

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

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

  815.         break;

  816.     case 12:

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

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

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

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

  821.         break;

  822.     default:

  823.         av_log(avctx, AV_LOG_ERROR,

  824.                "4:2:0, 4:2:2, 4:4:4 supports are currently specified for 8, 10 and 12 bits.\n");

  825.         av_log(avctx, AV_LOG_ERROR,

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

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

  828.         return AVERROR_INVALIDDATA;

  829.     }

  830. 

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

  832.     if (!desc)

  833.         return AVERROR(EINVAL);

  834. 

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

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

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

  838. 

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

  840. 

  841.     return 0;

  842. }

  843. 

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

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

  846. {

  847.     int ret = 0;

  848.     int log2_diff_max_min_transform_block_size;

  849.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  850.     int i;

  851. 

  852.     // Coded parameters

  853. 

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

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

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

  857.         return AVERROR_INVALIDDATA;

  858.     }

  859. 

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

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

  862.                sps->vps_id);

  863.         return AVERROR_INVALIDDATA;

  864.     }

  865. 

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

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

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

  869.                sps->max_sub_layers);

  870.         return AVERROR_INVALIDDATA;

  871.     }

  872. 

  873.     skip_bits1(gb); // temporal_id_nesting_flag

  874. 

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

  876.         return ret;

  877. 

  878.     *sps_id = get_ue_golomb_long(gb);

  879.     if (*sps_id >= MAX_SPS_COUNT) {

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

  881.         return AVERROR_INVALIDDATA;

  882.     }

  883. 

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

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

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

  887.         return AVERROR_INVALIDDATA;

  888.     }

  889. 

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

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

  892. 

  893.     if (sps->separate_colour_plane_flag)

  894.         sps->chroma_format_idc = 0;

  895. 

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

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

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

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

  900.         return ret;

  901. 

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

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

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

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

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

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

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

  909. 

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

  911.             av_log(avctx, AV_LOG_DEBUG,

  912.                    "discarding sps conformance window, "

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

  914.                    sps->pic_conf_win.left_offset,

  915.                    sps->pic_conf_win.right_offset,

  916.                    sps->pic_conf_win.top_offset,

  917.                    sps->pic_conf_win.bottom_offset);

  918. 

  919.             sps->pic_conf_win.left_offset   =

  920.             sps->pic_conf_win.right_offset  =

  921.             sps->pic_conf_win.top_offset    =

  922.             sps->pic_conf_win.bottom_offset = 0;

  923.         }

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

  925.     }

  926. 

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

  928.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  930.         av_log(avctx, AV_LOG_ERROR,

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

  932.                "this is unsupported.\n",

  933.                sps->bit_depth, bit_depth_chroma);

  934.         return AVERROR_INVALIDDATA;

  935.     }

  936.     sps->bit_depth_chroma = bit_depth_chroma;

  937. 

  938.     ret = map_pixel_format(avctx, sps);

  939.     if (ret < 0)

  940.         return ret;

  941. 

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

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

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

  945.                sps->log2_max_poc_lsb - 4);

  946.         return AVERROR_INVALIDDATA;

  947.     }

  948. 

  949.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  958.             return AVERROR_INVALIDDATA;

  959.         }

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

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

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

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

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

  965.                 return AVERROR_INVALIDDATA;

  966.             }

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

  968.         }

  969.     }

  970. 

  971.     if (!sublayer_ordering_info) {

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

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

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

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

  976.         }

  977.     }

  978. 

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

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

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

  982.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  983.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  984.                                                sps->log2_min_tb_size;

  985. 

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

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

  988.         return AVERROR_INVALIDDATA;

  989.     }

  990. 

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

  992.         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);

  993.         return AVERROR_INVALIDDATA;

  994.     }

  995. 

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

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

  998.         return AVERROR_INVALIDDATA;

  999.     }

  1000. 

  1001.     if (log2_diff_max_min_transform_block_size < 0 || log2_diff_max_min_transform_block_size > 30) {

  1002.         av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_transform_block_size", log2_diff_max_min_transform_block_size);

  1003.         return AVERROR_INVALIDDATA;

  1004.     }

  1005. 

  1006.     sps->max_transform_hierarchy_depth_inter = get_ue_golomb_long(gb);

  1007.     sps->max_transform_hierarchy_depth_intra = get_ue_golomb_long(gb);

  1008. 

  1009.     sps->scaling_list_enable_flag = get_bits1(gb);

  1010.     if (sps->scaling_list_enable_flag) {

  1011.         set_default_scaling_list_data(&sps->scaling_list);

  1012. 

  1013.         if (get_bits1(gb)) {

  1014.             ret = scaling_list_data(gb, avctx, &sps->scaling_list, sps);

  1015.             if (ret < 0)

  1016.                 return ret;

  1017.         }

  1018.     }

  1019. 

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

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

  1022. 

  1023.     sps->pcm_enabled_flag = get_bits1(gb);

  1024.     if (sps->pcm_enabled_flag) {

  1025.         sps->pcm.bit_depth   = get_bits(gb, 4) + 1;

  1026.         sps->pcm.bit_depth_chroma = get_bits(gb, 4) + 1;

  1027.         sps->pcm.log2_min_pcm_cb_size = get_ue_golomb_long(gb) + 3;

  1028.         sps->pcm.log2_max_pcm_cb_size = sps->pcm.log2_min_pcm_cb_size +

  1029.                                         get_ue_golomb_long(gb);

  1030.         if (FFMAX(sps->pcm.bit_depth, sps->pcm.bit_depth_chroma) > sps->bit_depth) {

  1031.             av_log(avctx, AV_LOG_ERROR,

  1032.                    "PCM bit depth (%d, %d) is greater than normal bit depth (%d)\n",

  1033.                    sps->pcm.bit_depth, sps->pcm.bit_depth_chroma, sps->bit_depth);

  1034.             return AVERROR_INVALIDDATA;

  1035.         }

  1036. 

  1037.         sps->pcm.loop_filter_disable_flag = get_bits1(gb);

  1038.     }

  1039. 

  1040.     sps->nb_st_rps = get_ue_golomb_long(gb);

  1041.     if (sps->nb_st_rps > MAX_SHORT_TERM_RPS_COUNT) {

  1042.         av_log(avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",

  1043.                sps->nb_st_rps);

  1044.         return AVERROR_INVALIDDATA;

  1045.     }

  1046.     for (i = 0; i < sps->nb_st_rps; i++) {

  1047.         if ((ret = ff_hevc_decode_short_term_rps(gb, avctx, &sps->st_rps[i],

  1048.                                                  sps, 0)) < 0)

  1049.             return ret;

  1050.     }

  1051. 

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

  1053.     if (sps->long_term_ref_pics_present_flag) {

  1054.         sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);

  1055.         if (sps->num_long_term_ref_pics_sps > 31U) {

  1056.             av_log(avctx, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",

  1057.                    sps->num_long_term_ref_pics_sps);

  1058.             return AVERROR_INVALIDDATA;

  1059.         }

  1060.         for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {

  1061.             sps->lt_ref_pic_poc_lsb_sps[i]       = get_bits(gb, sps->log2_max_poc_lsb);

  1062.             sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);

  1063.         }

  1064.     }

  1065. 

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

  1067.     sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);

  1068.     sps->vui.sar = (AVRational){0, 1};

  1069.     vui_present = get_bits1(gb);

  1070.     if (vui_present)

  1071.         decode_vui(gb, avctx, apply_defdispwin, sps);

  1072. 

  1073.     if (get_bits1(gb)) { // sps_extension_flag

  1074.         int sps_extension_flag[1];

  1075.         for (i = 0; i < 1; i++)

  1076.             sps_extension_flag[i] = get_bits1(gb);

  1077.         skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);

  1078.         if (sps_extension_flag[0]) {

  1079.             int extended_precision_processing_flag;

  1080.             int high_precision_offsets_enabled_flag;

  1081.             int cabac_bypass_alignment_enabled_flag;

  1082. 

  1083.             sps->transform_skip_rotation_enabled_flag = get_bits1(gb);

  1084.             sps->transform_skip_context_enabled_flag  = get_bits1(gb);

  1085.             sps->implicit_rdpcm_enabled_flag = get_bits1(gb);

  1086. 

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

  1088. 

  1089.             extended_precision_processing_flag = get_bits1(gb);

  1090.             if (extended_precision_processing_flag)

  1091.                 av_log(avctx, AV_LOG_WARNING,

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

  1093. 

  1094.             sps->intra_smoothing_disabled_flag       = get_bits1(gb);

  1095.             high_precision_offsets_enabled_flag  = get_bits1(gb);

  1096.             if (high_precision_offsets_enabled_flag)

  1097.                 av_log(avctx, AV_LOG_WARNING,

  1098.                    "high_precision_offsets_enabled_flag not yet implemented\n");

  1099. 

  1100.             sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);

  1101. 

  1102.             cabac_bypass_alignment_enabled_flag  = get_bits1(gb);

  1103.             if (cabac_bypass_alignment_enabled_flag)

  1104.                 av_log(avctx, AV_LOG_WARNING,

  1105.                    "cabac_bypass_alignment_enabled_flag not yet implemented\n");

  1106.         }

  1107.     }

  1108.     if (apply_defdispwin) {

  1109.         sps->output_window.left_offset   += sps->vui.def_disp_win.left_offset;

  1110.         sps->output_window.right_offset  += sps->vui.def_disp_win.right_offset;

  1111.         sps->output_window.top_offset    += sps->vui.def_disp_win.top_offset;

  1112.         sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

  1113.     }

  1114.     if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) &&

  1115.         !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {

  1116.         sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));

  1117.         av_log(avctx, AV_LOG_WARNING, "Reducing left output window to %d "

  1118.                "chroma samples to preserve alignment.\n",

  1119.                sps->output_window.left_offset);

  1120.     }

  1121.     sps->output_width  = sps->width -

  1122.                          (sps->output_window.left_offset + sps->output_window.right_offset);

  1123.     sps->output_height = sps->height -

  1124.                          (sps->output_window.top_offset + sps->output_window.bottom_offset);

  1125.     if (sps->width  <= sps->output_window.left_offset + (int64_t)sps->output_window.right_offset  ||

  1126.         sps->height <= sps->output_window.top_offset  + (int64_t)sps->output_window.bottom_offset) {

  1127.         av_log(avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",

  1128.                sps->output_width, sps->output_height);

  1129.         if (avctx->err_recognition & AV_EF_EXPLODE) {

  1130.             return AVERROR_INVALIDDATA;

  1131.         }

  1132.         av_log(avctx, AV_LOG_WARNING,

  1133.                "Displaying the whole video surface.\n");

  1134.         memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));

  1135.         memset(&sps->output_window, 0, sizeof(sps->output_window));

  1136.         sps->output_width               = sps->width;

  1137.         sps->output_height              = sps->height;

  1138.     }

  1139. 

  1140.     // Inferred parameters

  1141.     sps->log2_ctb_size = sps->log2_min_cb_size +

  1142.                          sps->log2_diff_max_min_coding_block_size;

  1143.     sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

  1144. 

  1145.     if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {

  1146.         av_log(avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);

  1147.         return AVERROR_INVALIDDATA;

  1148.     }

  1149.     if (sps->log2_ctb_size < 4) {

  1150.         av_log(avctx,

  1151.                AV_LOG_ERROR,

  1152.                "log2_ctb_size %d differs from the bounds of any known profile\n",

  1153.                sps->log2_ctb_size);

  1154.         avpriv_request_sample(avctx, "log2_ctb_size %d", sps->log2_ctb_size);

  1155.         return AVERROR_INVALIDDATA;

  1156.     }

  1157. 

  1158.     sps->ctb_width  = (sps->width  + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1159.     sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1160.     sps->ctb_size   = sps->ctb_width * sps->ctb_height;

  1161. 

  1162.     sps->min_cb_width  = sps->width  >> sps->log2_min_cb_size;

  1163.     sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

  1164.     sps->min_tb_width  = sps->width  >> sps->log2_min_tb_size;

  1165.     sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

  1166.     sps->min_pu_width  = sps->width  >> sps->log2_min_pu_size;

  1167.     sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

  1168.     sps->tb_mask       = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;

  1169. 

  1170.     sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

  1171. 

  1172.     if (av_mod_uintp2(sps->width, sps->log2_min_cb_size) ||

  1173.         av_mod_uintp2(sps->height, sps->log2_min_cb_size)) {

  1174.         av_log(avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  1175.         return AVERROR_INVALIDDATA;

  1176.     }

  1177. 

  1178.     if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1179.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

  1180.                sps->max_transform_hierarchy_depth_inter);

  1181.         return AVERROR_INVALIDDATA;

  1182.     }

  1183.     if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1184.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  1185.                sps->max_transform_hierarchy_depth_intra);

  1186.         return AVERROR_INVALIDDATA;

  1187.     }

  1188.     if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

  1189.         av_log(avctx, AV_LOG_ERROR,

  1190.                "max transform block size out of range: %d\n",

  1191.                sps->log2_max_trafo_size);

  1192.         return AVERROR_INVALIDDATA;

  1193.     }

  1194. 

  1195.     if (get_bits_left(gb) < 0) {

  1196.         av_log(avctx, AV_LOG_ERROR,

  1197.                "Overread SPS by %d bits\n", -get_bits_left(gb));

  1198.         return AVERROR_INVALIDDATA;

  1199.     }

  1200. 

  1201.     return 0;

  1202. }

  1203. 

  1204. int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,

  1205.                            HEVCParamSets *ps, int apply_defdispwin)

  1206. {

  1207.     HEVCSPS *sps;

  1208.     AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));

  1209.     unsigned int sps_id;

  1210.     int ret;

  1211.     ptrdiff_t nal_size;

  1212. 

  1213.     if (!sps_buf)

  1214.         return AVERROR(ENOMEM);

  1215.     sps = (HEVCSPS*)sps_buf->data;

  1216. 

  1217.     av_log(avctx, AV_LOG_DEBUG, "Decoding SPS\n");

  1218. 

  1219.     nal_size = gb->buffer_end - gb->buffer;

  1220.     if (nal_size > sizeof(sps->data)) {

  1221.         av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS "

  1222.                "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",

  1223.                nal_size, sizeof(sps->data));

  1224.         sps->data_size = sizeof(sps->data);

  1225.     } else {

  1226.         sps->data_size = nal_size;

  1227.     }

  1228.     memcpy(sps->data, gb->buffer, sps->data_size);

  1229. 

  1230.     ret = ff_hevc_parse_sps(sps, gb, &sps_id,

  1231.                             apply_defdispwin,

  1232.                             ps->vps_list, avctx);

  1233.     if (ret < 0) {

  1234.         av_buffer_unref(&sps_buf);

  1235.         return ret;

  1236.     }

  1237. 

  1238.     if (avctx->debug & FF_DEBUG_BITSTREAM) {

  1239.         av_log(avctx, AV_LOG_DEBUG,

  1240.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1241.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1242.                sps_id, sps->width, sps->height,

  1243.                sps->output_width, sps->output_height,

  1244.                av_get_pix_fmt_name(sps->pix_fmt));

  1245.     }

  1246. 

  1247.     /* check if this is a repeat of an already parsed SPS, then keep the

  1248.      * original one.

  1249.      * otherwise drop all PPSes that depend on it */

  1250.     if (ps->sps_list[sps_id] &&

  1251.         !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1252.         av_buffer_unref(&sps_buf);

  1253.     } else {

  1254.         remove_sps(ps, sps_id);

  1255.         ps->sps_list[sps_id] = sps_buf;

  1256.     }

  1257. 

  1258.     return 0;

  1259. }

  1260. 

  1261. static void hevc_pps_free(void *opaque, uint8_t *data)

  1262. {

  1263.     HEVCPPS *pps = (HEVCPPS*)data;

  1264. 

  1265.     av_freep(&pps->column_width);

  1266.     av_freep(&pps->row_height);

  1267.     av_freep(&pps->col_bd);

  1268.     av_freep(&pps->row_bd);

  1269.     av_freep(&pps->col_idxX);

  1270.     av_freep(&pps->ctb_addr_rs_to_ts);

  1271.     av_freep(&pps->ctb_addr_ts_to_rs);

  1272.     av_freep(&pps->tile_pos_rs);

  1273.     av_freep(&pps->tile_id);

  1274.     av_freep(&pps->min_tb_addr_zs_tab);

  1275. 

  1276.     av_freep(&pps);

  1277. }

  1278. 

  1279. static int pps_range_extensions(GetBitContext *gb, AVCodecContext *avctx,

  1280.                                 HEVCPPS *pps, HEVCSPS *sps) {

  1281.     int i;

  1282. 

  1283.     if (pps->transform_skip_enabled_flag) {

  1284.         pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;

  1285.     }

  1286.     pps->cross_component_prediction_enabled_flag = get_bits1(gb);

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

  1288.     if (pps->chroma_qp_offset_list_enabled_flag) {

  1289.         pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);

  1290.         pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);

  1291.         if (pps->chroma_qp_offset_list_len_minus1 && pps->chroma_qp_offset_list_len_minus1 >= 5) {

  1292.             av_log(avctx, AV_LOG_ERROR,

  1293.                    "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");

  1294.             return AVERROR_INVALIDDATA;

  1295.         }

  1296.         for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {

  1297.             pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);

  1298.             if (pps->cb_qp_offset_list[i]) {

  1299.                 av_log(avctx, AV_LOG_WARNING,

  1300.                        "cb_qp_offset_list not tested yet.\n");

  1301.             }

  1302.             pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);

  1303.             if (pps->cr_qp_offset_list[i]) {

  1304.                 av_log(avctx, AV_LOG_WARNING,

  1305.                        "cb_qp_offset_list not tested yet.\n");

  1306.             }

  1307.         }

  1308.     }

  1309.     pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);

  1310.     pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);

  1311. 

  1312.     return(0);

  1313. }

  1314. 

  1315. static inline int setup_pps(AVCodecContext *avctx, GetBitContext *gb,

  1316.                             HEVCPPS *pps, HEVCSPS *sps)

  1317. {

  1318.     int log2_diff;

  1319.     int pic_area_in_ctbs;

  1320.     int i, j, x, y, ctb_addr_rs, tile_id;

  1321. 

  1322.     // Inferred parameters

  1323.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1324.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1325.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1326.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX)

  1327.         return AVERROR(ENOMEM);

  1328. 

  1329.     if (pps->uniform_spacing_flag) {

  1330.         if (!pps->column_width) {

  1331.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1332.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1333.         }

  1334.         if (!pps->column_width || !pps->row_height)

  1335.             return AVERROR(ENOMEM);

  1336. 

  1337.         for (i = 0; i < pps->num_tile_columns; i++) {

  1338.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1339.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1340.         }

  1341. 

  1342.         for (i = 0; i < pps->num_tile_rows; i++) {

  1343.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1344.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1345.         }

  1346.     }

  1347. 

  1348.     pps->col_bd[0] = 0;

  1349.     for (i = 0; i < pps->num_tile_columns; i++)

  1350.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1351. 

  1352.     pps->row_bd[0] = 0;

  1353.     for (i = 0; i < pps->num_tile_rows; i++)

  1354.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1355. 

  1356.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1357.         if (i > pps->col_bd[j])

  1358.             j++;

  1359.         pps->col_idxX[i] = j;

  1360.     }

  1361. 

  1362.     /**

  1363.      * 6.5

  1364.      */

  1365.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1366. 

  1367.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1368.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1369.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1370.     pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));

  1371.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1372.         !pps->tile_id || !pps->min_tb_addr_zs_tab) {

  1373.         return AVERROR(ENOMEM);

  1374.     }

  1375. 

  1376.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1377.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1378.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1379.         int tile_x = 0;

  1380.         int tile_y = 0;

  1381.         int val    = 0;

  1382. 

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

  1384.             if (tb_x < pps->col_bd[i + 1]) {

  1385.                 tile_x = i;

  1386.                 break;

  1387.             }

  1388.         }

  1389. 

  1390.         for (i = 0; i < pps->num_tile_rows; i++) {

  1391.             if (tb_y < pps->row_bd[i + 1]) {

  1392.                 tile_y = i;

  1393.                 break;

  1394.             }

  1395.         }

  1396. 

  1397.         for (i = 0; i < tile_x; i++)

  1398.             val += pps->row_height[tile_y] * pps->column_width[i];

  1399.         for (i = 0; i < tile_y; i++)

  1400.             val += sps->ctb_width * pps->row_height[i];

  1401. 

  1402.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1403.                tb_x - pps->col_bd[tile_x];

  1404. 

  1405.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1406.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1407.     }

  1408. 

  1409.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1410.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1411.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1412.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1413.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1414. 

  1415.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1416.     if (!pps->tile_pos_rs)

  1417.         return AVERROR(ENOMEM);

  1418. 

  1419.     for (j = 0; j < pps->num_tile_rows; j++)

  1420.         for (i = 0; i < pps->num_tile_columns; i++)

  1421.             pps->tile_pos_rs[j * pps->num_tile_columns + i] =

  1422.                 pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1423. 

  1424.     log2_diff = sps->log2_ctb_size - sps->log2_min_tb_size;

  1425.     pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];

  1426.     for (y = 0; y < sps->tb_mask+2; y++) {

  1427.         pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;

  1428.         pps->min_tb_addr_zs_tab[y]    = -1;

  1429.     }

  1430.     for (y = 0; y < sps->tb_mask+1; y++) {

  1431.         for (x = 0; x < sps->tb_mask+1; x++) {

  1432.             int tb_x = x >> log2_diff;

  1433.             int tb_y = y >> log2_diff;

  1434.             int rs   = sps->ctb_width * tb_y + tb_x;

  1435.             int val  = pps->ctb_addr_rs_to_ts[rs] << (log2_diff * 2);

  1436.             for (i = 0; i < log2_diff; i++) {

  1437.                 int m = 1 << i;

  1438.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1439.             }

  1440.             pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;

  1441.         }

  1442.     }

  1443. 

  1444.     return 0;

  1445. }

  1446. 

  1447. int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,

  1448.                            HEVCParamSets *ps)

  1449. {

  1450.     HEVCSPS      *sps = NULL;

  1451.     int i, ret = 0;

  1452.     unsigned int pps_id = 0;

  1453.     ptrdiff_t nal_size;

  1454.     unsigned log2_parallel_merge_level_minus2;

  1455. 

  1456.     AVBufferRef *pps_buf;

  1457.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1458. 

  1459.     if (!pps)

  1460.         return AVERROR(ENOMEM);

  1461. 

  1462.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1463.                                hevc_pps_free, NULL, 0);

  1464.     if (!pps_buf) {

  1465.         av_freep(&pps);

  1466.         return AVERROR(ENOMEM);

  1467.     }

  1468. 

  1469.     av_log(avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1470. 

  1471.     nal_size = gb->buffer_end - gb->buffer;

  1472.     if (nal_size > sizeof(pps->data)) {

  1473.         av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "

  1474.                "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",

  1475.                nal_size, sizeof(pps->data));

  1476.         pps->data_size = sizeof(pps->data);

  1477.     } else {

  1478.         pps->data_size = nal_size;

  1479.     }

  1480.     memcpy(pps->data, gb->buffer, pps->data_size);

  1481. 

  1482.     // Default values

  1483.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1484.     pps->num_tile_columns                      = 1;

  1485.     pps->num_tile_rows                         = 1;

  1486.     pps->uniform_spacing_flag                  = 1;

  1487.     pps->disable_dbf                           = 0;

  1488.     pps->beta_offset                           = 0;

  1489.     pps->tc_offset                             = 0;

  1490.     pps->log2_max_transform_skip_block_size    = 2;

  1491. 

  1492.     // Coded parameters

  1493.     pps_id = get_ue_golomb_long(gb);

  1494.     if (pps_id >= MAX_PPS_COUNT) {

  1495.         av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1496.         ret = AVERROR_INVALIDDATA;

  1497.         goto err;

  1498.     }

  1499.     pps->sps_id = get_ue_golomb_long(gb);

  1500.     if (pps->sps_id >= MAX_SPS_COUNT) {

  1501.         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1502.         ret = AVERROR_INVALIDDATA;

  1503.         goto err;

  1504.     }

  1505.     if (!ps->sps_list[pps->sps_id]) {

  1506.         av_log(avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1507.         ret = AVERROR_INVALIDDATA;

  1508.         goto err;

  1509.     }

  1510.     sps = (HEVCSPS *)ps->sps_list[pps->sps_id]->data;

  1511. 

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

  1513.     pps->output_flag_present_flag              = get_bits1(gb);

  1514.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1515. 

  1516.     pps->sign_data_hiding_flag = get_bits1(gb);

  1517. 

  1518.     pps->cabac_init_present_flag = get_bits1(gb);

  1519. 

  1520.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1521.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1522. 

  1523.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1524. 

  1525.     pps->constrained_intra_pred_flag = get_bits1(gb);

  1526.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1527. 

  1528.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1529.     pps->diff_cu_qp_delta_depth   = 0;

  1530.     if (pps->cu_qp_delta_enabled_flag)

  1531.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1532. 

  1533.     if (pps->diff_cu_qp_delta_depth < 0 ||

  1534.         pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {

  1535.         av_log(avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",

  1536.                pps->diff_cu_qp_delta_depth);

  1537.         ret = AVERROR_INVALIDDATA;

  1538.         goto err;

  1539.     }

  1540. 

  1541.     pps->cb_qp_offset = get_se_golomb(gb);

  1542.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1543.         av_log(avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1544.                pps->cb_qp_offset);

  1545.         ret = AVERROR_INVALIDDATA;

  1546.         goto err;

  1547.     }

  1548.     pps->cr_qp_offset = get_se_golomb(gb);

  1549.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1550.         av_log(avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1551.                pps->cr_qp_offset);

  1552.         ret = AVERROR_INVALIDDATA;

  1553.         goto err;

  1554.     }

  1555.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1556. 

  1557.     pps->weighted_pred_flag   = get_bits1(gb);

  1558.     pps->weighted_bipred_flag = get_bits1(gb);

  1559. 

  1560.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1561.     pps->tiles_enabled_flag               = get_bits1(gb);

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

  1563. 

  1564.     if (pps->tiles_enabled_flag) {

  1565.         pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

  1566.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

  1567.         if (pps->num_tile_columns <= 0 ||

  1568.             pps->num_tile_columns >= sps->width) {

  1569.             av_log(avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1570.                    pps->num_tile_columns - 1);

  1571.             ret = AVERROR_INVALIDDATA;

  1572.             goto err;

  1573.         }

  1574.         if (pps->num_tile_rows <= 0 ||

  1575.             pps->num_tile_rows >= sps->height) {

  1576.             av_log(avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1577.                    pps->num_tile_rows - 1);

  1578.             ret = AVERROR_INVALIDDATA;

  1579.             goto err;

  1580.         }

  1581. 

  1582.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1583.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1584.         if (!pps->column_width || !pps->row_height) {

  1585.             ret = AVERROR(ENOMEM);

  1586.             goto err;

  1587.         }

  1588. 

  1589.         pps->uniform_spacing_flag = get_bits1(gb);

  1590.         if (!pps->uniform_spacing_flag) {

  1591.             uint64_t sum = 0;

  1592.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1593.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1594.                 sum                 += pps->column_width[i];

  1595.             }

  1596.             if (sum >= sps->ctb_width) {

  1597.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1598.                 ret = AVERROR_INVALIDDATA;

  1599.                 goto err;

  1600.             }

  1601.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1602. 

  1603.             sum = 0;

  1604.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1605.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1606.                 sum               += pps->row_height[i];

  1607.             }

  1608.             if (sum >= sps->ctb_height) {

  1609.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1610.                 ret = AVERROR_INVALIDDATA;

  1611.                 goto err;

  1612.             }

  1613.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1614.         }

  1615.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1616.     }

  1617. 

  1618.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1619. 

  1620.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1621.     if (pps->deblocking_filter_control_present_flag) {

  1622.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1623.         pps->disable_dbf                             = get_bits1(gb);

  1624.         if (!pps->disable_dbf) {

  1625.             int beta_offset_div2 = get_se_golomb(gb);

  1626.             int tc_offset_div2   = get_se_golomb(gb) ;

  1627.             if (beta_offset_div2 < -6 || beta_offset_div2 > 6) {

  1628.                 av_log(avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1629.                        beta_offset_div2);

  1630.                 ret = AVERROR_INVALIDDATA;

  1631.                 goto err;

  1632.             }

  1633.             if (tc_offset_div2 < -6 || tc_offset_div2 > 6) {

  1634.                 av_log(avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1635.                        tc_offset_div2);

  1636.                 ret = AVERROR_INVALIDDATA;

  1637.                 goto err;

  1638.             }

  1639.             pps->beta_offset = 2 * beta_offset_div2;

  1640.             pps->tc_offset   = 2 *   tc_offset_div2;

  1641.         }

  1642.     }

  1643. 

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

  1645.     if (pps->scaling_list_data_present_flag) {

  1646.         set_default_scaling_list_data(&pps->scaling_list);

  1647.         ret = scaling_list_data(gb, avctx, &pps->scaling_list, sps);

  1648.         if (ret < 0)

  1649.             goto err;

  1650.     }

  1651.     pps->lists_modification_present_flag = get_bits1(gb);

  1652.     log2_parallel_merge_level_minus2     = get_ue_golomb_long(gb);

  1653.     if (log2_parallel_merge_level_minus2 > sps->log2_ctb_size) {

  1654.         av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1655.                log2_parallel_merge_level_minus2);

  1656.         ret = AVERROR_INVALIDDATA;

  1657.         goto err;

  1658.     }

  1659.     pps->log2_parallel_merge_level       = log2_parallel_merge_level_minus2 + 2;

  1660. 

  1661.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1662. 

  1663.     if (get_bits1(gb)) { // pps_extension_present_flag

  1664.         int pps_range_extensions_flag = get_bits1(gb);

  1665.         /* int pps_extension_7bits = */ get_bits(gb, 7);

  1666.         if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {

  1667.             if ((ret = pps_range_extensions(gb, avctx, pps, sps)) < 0)

  1668.                 goto err;

  1669.         }

  1670.     }

  1671. 

  1672.     ret = setup_pps(avctx, gb, pps, sps);

  1673.     if (ret < 0)

  1674.         goto err;

  1675. 

  1676.     if (get_bits_left(gb) < 0) {

  1677.         av_log(avctx, AV_LOG_ERROR,

  1678.                "Overread PPS by %d bits\n", -get_bits_left(gb));

  1679.         goto err;

  1680.     }

  1681. 

  1682.     remove_pps(ps, pps_id);

  1683.     ps->pps_list[pps_id] = pps_buf;

  1684. 

  1685.     return 0;

  1686. 

  1687. err:

  1688.     av_buffer_unref(&pps_buf);

  1689.     return ret;

  1690. }