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

  229.                     av_log(avctx, AV_LOG_ERROR,

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

  231.                         delta_poc);

  232.                     return AVERROR_INVALIDDATA;

  233.                 }

  234.                 prev -= delta_poc;

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

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

  237.             }

  238.             prev = 0;

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

  240.                 delta_poc = get_ue_golomb_long(gb) + 1;

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

  242.                     av_log(avctx, AV_LOG_ERROR,

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

  244.                         delta_poc);

  245.                     return AVERROR_INVALIDDATA;

  246.                 }

  247.                 prev += delta_poc;

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

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

  250.             }

  251.         }

  252.     }

  253.     return 0;

  254. }

  255. 

  256. 

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

  258.                                       PTLCommon *ptl)

  259. {

  260.     int i;

  261. 

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

  263.         return -1;

  264. 

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

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

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

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

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

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

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

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

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

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

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

  276.     else

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

  278. 

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

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

  281. 

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

  283.             ptl->profile_idc = i;

  284.     }

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

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

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

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

  289. 

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

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

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

  293. 

  294.     return 0;

  295. }

  296. 

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

  298.                       PTL *ptl, int max_num_sub_layers)

  299. {

  300.     int i;

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

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

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

  304.         return -1;

  305.     }

  306. 

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

  308. 

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

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

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

  312.     }

  313. 

  314.     if (max_num_sub_layers - 1> 0)

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

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

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

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

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

  320.             av_log(avctx, AV_LOG_ERROR,

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

  322.             return -1;

  323.         }

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

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

  326.                 av_log(avctx, AV_LOG_ERROR,

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

  328.                 return -1;

  329.             } else

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

  331.         }

  332.     }

  333. 

  334.     return 0;

  335. }

  336. 

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

  338.                                 int subpic_params_present)

  339. {

  340.     int i;

  341. 

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

  343.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  344.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  345. 

  346.         if (subpic_params_present) {

  347.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  348.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  349.         }

  350.         skip_bits1(gb); // cbr_flag

  351.     }

  352. }

  353. 

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

  355.                        int max_sublayers)

  356. {

  357.     int nal_params_present = 0, vcl_params_present = 0;

  358.     int subpic_params_present = 0;

  359.     int i;

  360. 

  361.     if (common_inf_present) {

  362.         nal_params_present = get_bits1(gb);

  363.         vcl_params_present = get_bits1(gb);

  364. 

  365.         if (nal_params_present || vcl_params_present) {

  366.             subpic_params_present = get_bits1(gb);

  367. 

  368.             if (subpic_params_present) {

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

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

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

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

  373.             }

  374. 

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

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

  377. 

  378.             if (subpic_params_present)

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

  380. 

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

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

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

  384.         }

  385.     }

  386. 

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

  388.         int low_delay = 0;

  389.         unsigned int nb_cpb = 1;

  390.         int fixed_rate = get_bits1(gb);

  391. 

  392.         if (!fixed_rate)

  393.             fixed_rate = get_bits1(gb);

  394. 

  395.         if (fixed_rate)

  396.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  397.         else

  398.             low_delay = get_bits1(gb);

  399. 

  400.         if (!low_delay) {

  401.             nb_cpb = get_ue_golomb_long(gb) + 1;

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

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

  404.                 return AVERROR_INVALIDDATA;

  405.             }

  406.         }

  407. 

  408.         if (nal_params_present)

  409.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  410.         if (vcl_params_present)

  411.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  412.     }

  413.     return 0;

  414. }

  415. 

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

  417.                            HEVCParamSets *ps)

  418. {

  419.     int i,j;

  420.     int vps_id = 0;

  421.     ptrdiff_t nal_size;

  422.     HEVCVPS *vps;

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

  424. 

  425.     if (!vps_buf)

  426.         return AVERROR(ENOMEM);

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

  428. 

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

  430. 

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

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

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

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

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

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

  437.     } else {

  438.         vps->data_size = nal_size;

  439.     }

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

  441. 

  442.     vps_id = get_bits(gb, 4);

  443.     if (vps_id >= HEVC_MAX_VPS_COUNT) {

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

  445.         goto err;

  446.     }

  447. 

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

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

  450.         goto err;

  451.     }

  452. 

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

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

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

  456. 

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

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

  459.         goto err;

  460.     }

  461. 

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

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

  464.                vps->vps_max_sub_layers);

  465.         goto err;

  466.     }

  467. 

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

  469.         goto err;

  470. 

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

  472. 

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

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

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

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

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

  478. 

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

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

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

  482.             goto err;

  483.         }

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

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

  486.                    vps->vps_num_reorder_pics[i]);

  487.             if (avctx->err_recognition & AV_EF_EXPLODE)

  488.                 goto err;

  489.         }

  490.     }

  491. 

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

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

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

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

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

  497.         goto err;

  498.     }

  499. 

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

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

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

  503. 

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

  505.     if (vps->vps_timing_info_present_flag) {

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

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

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

  509.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  513.             av_log(avctx, AV_LOG_ERROR,

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

  515.             goto err;

  516.         }

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

  518.             int common_inf_present = 1;

  519. 

  520.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  521.             if (i)

  522.                 common_inf_present = get_bits1(gb);

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

  524.         }

  525.     }

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

  527. 

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

  529.         av_log(avctx, AV_LOG_ERROR,

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

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

  532.             goto err;

  533.     }

  534. 

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

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

  537.         av_buffer_unref(&vps_buf);

  538.     } else {

  539.         remove_vps(ps, vps_id);

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

  541.     }

  542. 

  543.     return 0;

  544. 

  545. err:

  546.     av_buffer_unref(&vps_buf);

  547.     return AVERROR_INVALIDDATA;

  548. }

  549. 

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

  551.                        int apply_defdispwin, HEVCSPS *sps)

  552. {

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

  554.     GetBitContext backup;

  555.     int sar_present, alt = 0;

  556. 

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

  558. 

  559.     sar_present = get_bits1(gb);

  560.     if (sar_present) {

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

  562.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  564.         else if (sar_idx == 255) {

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

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

  567.         } else

  568.             av_log(avctx, AV_LOG_WARNING,

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

  570.     }

  571. 

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

  573.     if (vui->overscan_info_present_flag)

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

  575. 

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

  577.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  582.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  583.         if (vui->colour_description_present_flag) {

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

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

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

  587. 

  588.             // Set invalid values to "unspecified"

  589.             if (!av_color_primaries_name(vui->colour_primaries))

  590.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

  591.             if (!av_color_transfer_name(vui->transfer_characteristic))

  592.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

  593.             if (!av_color_space_name(vui->matrix_coeffs))

  594.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

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

  596.                 switch (sps->pix_fmt) {

  597.                 case AV_PIX_FMT_YUV444P:

  598.                     sps->pix_fmt = AV_PIX_FMT_GBRP;

  599.                     break;

  600.                 case AV_PIX_FMT_YUV444P10:

  601.                     sps->pix_fmt = AV_PIX_FMT_GBRP10;

  602.                     break;

  603.                 case AV_PIX_FMT_YUV444P12:

  604.                     sps->pix_fmt = AV_PIX_FMT_GBRP12;

  605.                     break;

  606.                 }

  607.             }

  608.         }

  609.     }

  610. 

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

  612.     if (vui->chroma_loc_info_present_flag) {

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

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

  615.     }

  616. 

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

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

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

  620. 

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

  622.         vui->default_display_window_flag = 0;

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

  624.     } else

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

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

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

  628. 

  629.     if (vui->default_display_window_flag) {

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

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

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

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

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

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

  636. 

  637.         if (apply_defdispwin &&

  638.             avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {

  639.             av_log(avctx, AV_LOG_DEBUG,

  640.                    "discarding vui default display window, "

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

  642.                    vui->def_disp_win.left_offset,

  643.                    vui->def_disp_win.right_offset,

  644.                    vui->def_disp_win.top_offset,

  645.                    vui->def_disp_win.bottom_offset);

  646. 

  647.             vui->def_disp_win.left_offset   =

  648.             vui->def_disp_win.right_offset  =

  649.             vui->def_disp_win.top_offset    =

  650.             vui->def_disp_win.bottom_offset = 0;

  651.         }

  652.     }

  653. 

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

  655. 

  656.     if (vui->vui_timing_info_present_flag) {

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

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

  659.             // at where def_disp_win is normally located

  660.             av_log(avctx, AV_LOG_WARNING,

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

  662.             vui->default_display_window_flag = 0;

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

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

  665.             alt = 1;

  666.         }

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

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

  669.         if (alt) {

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

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

  672.         }

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

  674.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  677.         if (vui->vui_hrd_parameters_present_flag)

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

  679.     }

  680. 

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

  682.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  691.     }

  692. }

  693. 

  694. static void set_default_scaling_list_data(ScalingList *sl)

  695. {

  696.     int matrixId;

  697. 

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

  699.         // 4x4 default is 16

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

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

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

  703.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  722. }

  723. 

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

  725. {

  726.     uint8_t scaling_list_pred_mode_flag;

  727.     int32_t scaling_list_dc_coef[2][6];

  728.     int size_id, matrix_id, pos;

  729.     int i;

  730. 

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

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

  733.             scaling_list_pred_mode_flag = get_bits1(gb);

  734.             if (!scaling_list_pred_mode_flag) {

  735.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  738.                 if (delta) {

  739.                     // Copy from previous array.

  740.                     delta *= (size_id == 3) ? 3 : 1;

  741.                     if (matrix_id < delta) {

  742.                         av_log(avctx, AV_LOG_ERROR,

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

  744.                         return AVERROR_INVALIDDATA;

  745.                     }

  746. 

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

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

  749.                            size_id > 0 ? 64 : 16);

  750.                     if (size_id > 1)

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

  752.                 }

  753.             } else {

  754.                 int next_coef, coef_num;

  755.                 int32_t scaling_list_delta_coef;

  756. 

  757.                 next_coef = 8;

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

  759.                 if (size_id > 1) {

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

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

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

  763.                 }

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

  765.                     if (size_id == 0)

  766.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  767.                                   ff_hevc_diag_scan4x4_x[i];

  768.                     else

  769.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  770.                                   ff_hevc_diag_scan8x8_x[i];

  771. 

  772.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  775.                 }

  776.             }

  777.         }

  778. 

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

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

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

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

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

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

  785.         }

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

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

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

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

  790.     }

  791. 

  792. 

  793.     return 0;

  794. }

  795. 

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

  797. {

  798.     const AVPixFmtDescriptor *desc;

  799.     switch (sps->bit_depth) {

  800.     case 8:

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

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

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

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

  805.        break;

  806.     case 9:

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

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

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

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

  811.         break;

  812.     case 10:

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

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

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

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

  817.         break;

  818.     case 12:

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

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

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

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

  823.         break;

  824.     default:

  825.         av_log(avctx, AV_LOG_ERROR,

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

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

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

  829.         return AVERROR_INVALIDDATA;

  830.     }

  831. 

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

  833.     if (!desc)

  834.         return AVERROR(EINVAL);

  835. 

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

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

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

  839. 

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

  841. 

  842.     return 0;

  843. }

  844. 

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

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

  847. {

  848.     HEVCWindow *ow;

  849.     int ret = 0;

  850.     int log2_diff_max_min_transform_block_size;

  851.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  852.     int i;

  853. 

  854.     // Coded parameters

  855. 

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

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

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

  859.         return AVERROR_INVALIDDATA;

  860.     }

  861. 

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

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

  864.                sps->vps_id);

  865.         return AVERROR_INVALIDDATA;

  866.     }

  867. 

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

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

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

  871.                sps->max_sub_layers);

  872.         return AVERROR_INVALIDDATA;

  873.     }

  874. 

  875.     skip_bits1(gb); // temporal_id_nesting_flag

  876. 

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

  878.         return ret;

  879. 

  880.     *sps_id = get_ue_golomb_long(gb);

  881.     if (*sps_id >= HEVC_MAX_SPS_COUNT) {

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

  883.         return AVERROR_INVALIDDATA;

  884.     }

  885. 

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

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

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

  889.         return AVERROR_INVALIDDATA;

  890.     }

  891. 

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

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

  894. 

  895.     if (sps->separate_colour_plane_flag)

  896.         sps->chroma_format_idc = 0;

  897. 

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

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

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

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

  902.         return ret;

  903. 

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

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

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

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

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

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

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

  911. 

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

  913.             av_log(avctx, AV_LOG_DEBUG,

  914.                    "discarding sps conformance window, "

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

  916.                    sps->pic_conf_win.left_offset,

  917.                    sps->pic_conf_win.right_offset,

  918.                    sps->pic_conf_win.top_offset,

  919.                    sps->pic_conf_win.bottom_offset);

  920. 

  921.             sps->pic_conf_win.left_offset   =

  922.             sps->pic_conf_win.right_offset  =

  923.             sps->pic_conf_win.top_offset    =

  924.             sps->pic_conf_win.bottom_offset = 0;

  925.         }

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

  927.     }

  928. 

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

  930.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  932.         av_log(avctx, AV_LOG_ERROR,

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

  934.                "this is unsupported.\n",

  935.                sps->bit_depth, bit_depth_chroma);

  936.         return AVERROR_INVALIDDATA;

  937.     }

  938. 

  939.     ret = map_pixel_format(avctx, sps);

  940.     if (ret < 0)

  941.         return ret;

  942. 

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

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

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

  946.                sps->log2_max_poc_lsb - 4);

  947.         return AVERROR_INVALIDDATA;

  948.     }

  949. 

  950.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  959.             return AVERROR_INVALIDDATA;

  960.         }

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

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

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

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

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

  966.                 return AVERROR_INVALIDDATA;

  967.             }

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

  969.         }

  970.     }

  971. 

  972.     if (!sublayer_ordering_info) {

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

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

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

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

  977.         }

  978.     }

  979. 

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

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

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

  983.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  984.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  985.                                                sps->log2_min_tb_size;

  986. 

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

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

  989.         return AVERROR_INVALIDDATA;

  990.     }

  991. 

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

  993.         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);

  994.         return AVERROR_INVALIDDATA;

  995.     }

  996. 

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

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

  999.         return AVERROR_INVALIDDATA;

  1000.     }

  1001. 

  1002.     if (log2_diff_max_min_transform_block_size < 0 || log2_diff_max_min_transform_block_size > 30) {

  1003.         av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_transform_block_size", log2_diff_max_min_transform_block_size);

  1004.         return AVERROR_INVALIDDATA;

  1005.     }

  1006. 

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

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

  1009. 

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

  1011.     if (sps->scaling_list_enable_flag) {

  1012.         set_default_scaling_list_data(&sps->scaling_list);

  1013. 

  1014.         if (get_bits1(gb)) {

  1015.             ret = scaling_list_data(gb, avctx, &sps->scaling_list, sps);

  1016.             if (ret < 0)

  1017.                 return ret;

  1018.         }

  1019.     }

  1020. 

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

  1022.     sps->sao_enabled      = get_bits1(gb);

  1023. 

  1024.     sps->pcm_enabled_flag = get_bits1(gb);

  1025.     if (sps->pcm_enabled_flag) {

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

  1027.         sps->pcm.bit_depth_chroma = get_bits(gb, 4) + 1;

  1028.         sps->pcm.log2_min_pcm_cb_size = get_ue_golomb_long(gb) + 3;

  1029.         sps->pcm.log2_max_pcm_cb_size = sps->pcm.log2_min_pcm_cb_size +

  1030.                                         get_ue_golomb_long(gb);

  1031.         if (sps->pcm.bit_depth > sps->bit_depth) {

  1032.             av_log(avctx, AV_LOG_ERROR,

  1033.                    "PCM bit depth (%d) is greater than normal bit depth (%d)\n",

  1034.                    sps->pcm.bit_depth, sps->bit_depth);

  1035.             return AVERROR_INVALIDDATA;

  1036.         }

  1037. 

  1038.         sps->pcm.loop_filter_disable_flag = get_bits1(gb);

  1039.     }

  1040. 

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

  1042.     if (sps->nb_st_rps > HEVC_MAX_SHORT_TERM_RPS_COUNT) {

  1043.         av_log(avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",

  1044.                sps->nb_st_rps);

  1045.         return AVERROR_INVALIDDATA;

  1046.     }

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

  1048.         if ((ret = ff_hevc_decode_short_term_rps(gb, avctx, &sps->st_rps[i],

  1049.                                                  sps, 0)) < 0)

  1050.             return ret;

  1051.     }

  1052. 

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

  1054.     if (sps->long_term_ref_pics_present_flag) {

  1055.         sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);

  1056.         if (sps->num_long_term_ref_pics_sps > 31U) {

  1057.             av_log(avctx, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",

  1058.                    sps->num_long_term_ref_pics_sps);

  1059.             return AVERROR_INVALIDDATA;

  1060.         }

  1061.         for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {

  1062.             sps->lt_ref_pic_poc_lsb_sps[i]       = get_bits(gb, sps->log2_max_poc_lsb);

  1063.             sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);

  1064.         }

  1065.     }

  1066. 

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

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

  1069.     sps->vui.sar = (AVRational){0, 1};

  1070.     vui_present = get_bits1(gb);

  1071.     if (vui_present)

  1072.         decode_vui(gb, avctx, apply_defdispwin, sps);

  1073. 

  1074.     if (get_bits1(gb)) { // sps_extension_flag

  1075.         int sps_extension_flag[1];

  1076.         for (i = 0; i < 1; i++)

  1077.             sps_extension_flag[i] = get_bits1(gb);

  1078.         skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);

  1079.         if (sps_extension_flag[0]) {

  1080.             int extended_precision_processing_flag;

  1081.             int high_precision_offsets_enabled_flag;

  1082.             int cabac_bypass_alignment_enabled_flag;

  1083. 

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

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

  1086.             sps->implicit_rdpcm_enabled_flag = get_bits1(gb);

  1087. 

  1088.             sps->explicit_rdpcm_enabled_flag = get_bits1(gb);

  1089. 

  1090.             extended_precision_processing_flag = get_bits1(gb);

  1091.             if (extended_precision_processing_flag)

  1092.                 av_log(avctx, AV_LOG_WARNING,

  1093.                    "extended_precision_processing_flag not yet implemented\n");

  1094. 

  1095.             sps->intra_smoothing_disabled_flag       = get_bits1(gb);

  1096.             high_precision_offsets_enabled_flag  = get_bits1(gb);

  1097.             if (high_precision_offsets_enabled_flag)

  1098.                 av_log(avctx, AV_LOG_WARNING,

  1099.                    "high_precision_offsets_enabled_flag not yet implemented\n");

  1100. 

  1101.             sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);

  1102. 

  1103.             cabac_bypass_alignment_enabled_flag  = get_bits1(gb);

  1104.             if (cabac_bypass_alignment_enabled_flag)

  1105.                 av_log(avctx, AV_LOG_WARNING,

  1106.                    "cabac_bypass_alignment_enabled_flag not yet implemented\n");

  1107.         }

  1108.     }

  1109.     if (apply_defdispwin) {

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

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

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

  1113.         sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

  1114.     }

  1115. 

  1116.     ow = &sps->output_window;

  1117.     if (ow->left_offset >= INT_MAX - ow->right_offset     ||

  1118.         ow->top_offset  >= INT_MAX - ow->bottom_offset    ||

  1119.         ow->left_offset + ow->right_offset  >= sps->width ||

  1120.         ow->top_offset  + ow->bottom_offset >= sps->height) {

  1121.         av_log(avctx, AV_LOG_WARNING, "Invalid cropping offsets: %u/%u/%u/%u\n",

  1122.                ow->left_offset, ow->right_offset, ow->top_offset, ow->bottom_offset);

  1123.         if (avctx->err_recognition & AV_EF_EXPLODE) {

  1124.             return AVERROR_INVALIDDATA;

  1125.         }

  1126.         av_log(avctx, AV_LOG_WARNING,

  1127.                "Displaying the whole video surface.\n");

  1128.         memset(ow, 0, sizeof(*ow));

  1129.         memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));

  1130.     }

  1131. 

  1132.     // Inferred parameters

  1133.     sps->log2_ctb_size = sps->log2_min_cb_size +

  1134.                          sps->log2_diff_max_min_coding_block_size;

  1135.     sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

  1136. 

  1137.     if (sps->log2_ctb_size > HEVC_MAX_LOG2_CTB_SIZE) {

  1138.         av_log(avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);

  1139.         return AVERROR_INVALIDDATA;

  1140.     }

  1141.     if (sps->log2_ctb_size < 4) {

  1142.         av_log(avctx,

  1143.                AV_LOG_ERROR,

  1144.                "log2_ctb_size %d differs from the bounds of any known profile\n",

  1145.                sps->log2_ctb_size);

  1146.         avpriv_request_sample(avctx, "log2_ctb_size %d", sps->log2_ctb_size);

  1147.         return AVERROR_INVALIDDATA;

  1148.     }

  1149. 

  1150.     sps->ctb_width  = (sps->width  + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1151.     sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1152.     sps->ctb_size   = sps->ctb_width * sps->ctb_height;

  1153. 

  1154.     sps->min_cb_width  = sps->width  >> sps->log2_min_cb_size;

  1155.     sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

  1156.     sps->min_tb_width  = sps->width  >> sps->log2_min_tb_size;

  1157.     sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

  1158.     sps->min_pu_width  = sps->width  >> sps->log2_min_pu_size;

  1159.     sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

  1160.     sps->tb_mask       = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;

  1161. 

  1162.     sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

  1163. 

  1164.     if (av_mod_uintp2(sps->width, sps->log2_min_cb_size) ||

  1165.         av_mod_uintp2(sps->height, sps->log2_min_cb_size)) {

  1166.         av_log(avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  1167.         return AVERROR_INVALIDDATA;

  1168.     }

  1169. 

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

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

  1172.                sps->max_transform_hierarchy_depth_inter);

  1173.         return AVERROR_INVALIDDATA;

  1174.     }

  1175.     if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1176.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  1177.                sps->max_transform_hierarchy_depth_intra);

  1178.         return AVERROR_INVALIDDATA;

  1179.     }

  1180.     if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

  1181.         av_log(avctx, AV_LOG_ERROR,

  1182.                "max transform block size out of range: %d\n",

  1183.                sps->log2_max_trafo_size);

  1184.         return AVERROR_INVALIDDATA;

  1185.     }

  1186. 

  1187.     if (get_bits_left(gb) < 0) {

  1188.         av_log(avctx, AV_LOG_ERROR,

  1189.                "Overread SPS by %d bits\n", -get_bits_left(gb));

  1190.         return AVERROR_INVALIDDATA;

  1191.     }

  1192. 

  1193.     return 0;

  1194. }

  1195. 

  1196. int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,

  1197.                            HEVCParamSets *ps, int apply_defdispwin)

  1198. {

  1199.     HEVCSPS *sps;

  1200.     AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));

  1201.     unsigned int sps_id;

  1202.     int ret;

  1203.     ptrdiff_t nal_size;

  1204. 

  1205.     if (!sps_buf)

  1206.         return AVERROR(ENOMEM);

  1207.     sps = (HEVCSPS*)sps_buf->data;

  1208. 

  1209.     av_log(avctx, AV_LOG_DEBUG, "Decoding SPS\n");

  1210. 

  1211.     nal_size = gb->buffer_end - gb->buffer;

  1212.     if (nal_size > sizeof(sps->data)) {

  1213.         av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS "

  1214.                "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",

  1215.                nal_size, sizeof(sps->data));

  1216.         sps->data_size = sizeof(sps->data);

  1217.     } else {

  1218.         sps->data_size = nal_size;

  1219.     }

  1220.     memcpy(sps->data, gb->buffer, sps->data_size);

  1221. 

  1222.     ret = ff_hevc_parse_sps(sps, gb, &sps_id,

  1223.                             apply_defdispwin,

  1224.                             ps->vps_list, avctx);

  1225.     if (ret < 0) {

  1226.         av_buffer_unref(&sps_buf);

  1227.         return ret;

  1228.     }

  1229. 

  1230.     if (avctx->debug & FF_DEBUG_BITSTREAM) {

  1231.         av_log(avctx, AV_LOG_DEBUG,

  1232.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1233.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1234.                sps_id, sps->width, sps->height,

  1235.                sps->width - (sps->output_window.left_offset + sps->output_window.right_offset),

  1236.                sps->height - (sps->output_window.top_offset + sps->output_window.bottom_offset),

  1237.                av_get_pix_fmt_name(sps->pix_fmt));

  1238.     }

  1239. 

  1240.     /* check if this is a repeat of an already parsed SPS, then keep the

  1241.      * original one.

  1242.      * otherwise drop all PPSes that depend on it */

  1243.     if (ps->sps_list[sps_id] &&

  1244.         !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1245.         av_buffer_unref(&sps_buf);

  1246.     } else {

  1247.         remove_sps(ps, sps_id);

  1248.         ps->sps_list[sps_id] = sps_buf;

  1249.     }

  1250. 

  1251.     return 0;

  1252. }

  1253. 

  1254. static void hevc_pps_free(void *opaque, uint8_t *data)

  1255. {

  1256.     HEVCPPS *pps = (HEVCPPS*)data;

  1257. 

  1258.     av_freep(&pps->column_width);

  1259.     av_freep(&pps->row_height);

  1260.     av_freep(&pps->col_bd);

  1261.     av_freep(&pps->row_bd);

  1262.     av_freep(&pps->col_idxX);

  1263.     av_freep(&pps->ctb_addr_rs_to_ts);

  1264.     av_freep(&pps->ctb_addr_ts_to_rs);

  1265.     av_freep(&pps->tile_pos_rs);

  1266.     av_freep(&pps->tile_id);

  1267.     av_freep(&pps->min_tb_addr_zs_tab);

  1268. 

  1269.     av_freep(&pps);

  1270. }

  1271. 

  1272. static int pps_range_extensions(GetBitContext *gb, AVCodecContext *avctx,

  1273.                                 HEVCPPS *pps, HEVCSPS *sps) {

  1274.     int i;

  1275. 

  1276.     if (pps->transform_skip_enabled_flag) {

  1277.         pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;

  1278.     }

  1279.     pps->cross_component_prediction_enabled_flag = get_bits1(gb);

  1280.     pps->chroma_qp_offset_list_enabled_flag = get_bits1(gb);

  1281.     if (pps->chroma_qp_offset_list_enabled_flag) {

  1282.         pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);

  1283.         pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);

  1284.         if (pps->chroma_qp_offset_list_len_minus1 && pps->chroma_qp_offset_list_len_minus1 >= 5) {

  1285.             av_log(avctx, AV_LOG_ERROR,

  1286.                    "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");

  1287.             return AVERROR_INVALIDDATA;

  1288.         }

  1289.         for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {

  1290.             pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);

  1291.             if (pps->cb_qp_offset_list[i]) {

  1292.                 av_log(avctx, AV_LOG_WARNING,

  1293.                        "cb_qp_offset_list not tested yet.\n");

  1294.             }

  1295.             pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);

  1296.             if (pps->cr_qp_offset_list[i]) {

  1297.                 av_log(avctx, AV_LOG_WARNING,

  1298.                        "cb_qp_offset_list not tested yet.\n");

  1299.             }

  1300.         }

  1301.     }

  1302.     pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);

  1303.     pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);

  1304. 

  1305.     return(0);

  1306. }

  1307. 

  1308. static inline int setup_pps(AVCodecContext *avctx, GetBitContext *gb,

  1309.                             HEVCPPS *pps, HEVCSPS *sps)

  1310. {

  1311.     int log2_diff;

  1312.     int pic_area_in_ctbs;

  1313.     int i, j, x, y, ctb_addr_rs, tile_id;

  1314. 

  1315.     // Inferred parameters

  1316.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1317.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1318.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1319.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX)

  1320.         return AVERROR(ENOMEM);

  1321. 

  1322.     if (pps->uniform_spacing_flag) {

  1323.         if (!pps->column_width) {

  1324.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1325.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1326.         }

  1327.         if (!pps->column_width || !pps->row_height)

  1328.             return AVERROR(ENOMEM);

  1329. 

  1330.         for (i = 0; i < pps->num_tile_columns; i++) {

  1331.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1332.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1333.         }

  1334. 

  1335.         for (i = 0; i < pps->num_tile_rows; i++) {

  1336.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1337.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1338.         }

  1339.     }

  1340. 

  1341.     pps->col_bd[0] = 0;

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

  1343.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1344. 

  1345.     pps->row_bd[0] = 0;

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

  1347.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1348. 

  1349.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1350.         if (i > pps->col_bd[j])

  1351.             j++;

  1352.         pps->col_idxX[i] = j;

  1353.     }

  1354. 

  1355.     /**

  1356.      * 6.5

  1357.      */

  1358.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1359. 

  1360.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1361.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1362.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1363.     pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));

  1364.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1365.         !pps->tile_id || !pps->min_tb_addr_zs_tab) {

  1366.         return AVERROR(ENOMEM);

  1367.     }

  1368. 

  1369.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1370.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1371.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1372.         int tile_x = 0;

  1373.         int tile_y = 0;

  1374.         int val    = 0;

  1375. 

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

  1377.             if (tb_x < pps->col_bd[i + 1]) {

  1378.                 tile_x = i;

  1379.                 break;

  1380.             }

  1381.         }

  1382. 

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

  1384.             if (tb_y < pps->row_bd[i + 1]) {

  1385.                 tile_y = i;

  1386.                 break;

  1387.             }

  1388.         }

  1389. 

  1390.         for (i = 0; i < tile_x; i++)

  1391.             val += pps->row_height[tile_y] * pps->column_width[i];

  1392.         for (i = 0; i < tile_y; i++)

  1393.             val += sps->ctb_width * pps->row_height[i];

  1394. 

  1395.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1396.                tb_x - pps->col_bd[tile_x];

  1397. 

  1398.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1399.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1400.     }

  1401. 

  1402.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1403.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1404.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1405.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1406.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1407. 

  1408.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1409.     if (!pps->tile_pos_rs)

  1410.         return AVERROR(ENOMEM);

  1411. 

  1412.     for (j = 0; j < pps->num_tile_rows; j++)

  1413.         for (i = 0; i < pps->num_tile_columns; i++)

  1414.             pps->tile_pos_rs[j * pps->num_tile_columns + i] =

  1415.                 pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1416. 

  1417.     log2_diff = sps->log2_ctb_size - sps->log2_min_tb_size;

  1418.     pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];

  1419.     for (y = 0; y < sps->tb_mask+2; y++) {

  1420.         pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;

  1421.         pps->min_tb_addr_zs_tab[y]    = -1;

  1422.     }

  1423.     for (y = 0; y < sps->tb_mask+1; y++) {

  1424.         for (x = 0; x < sps->tb_mask+1; x++) {

  1425.             int tb_x = x >> log2_diff;

  1426.             int tb_y = y >> log2_diff;

  1427.             int rs   = sps->ctb_width * tb_y + tb_x;

  1428.             int val  = pps->ctb_addr_rs_to_ts[rs] << (log2_diff * 2);

  1429.             for (i = 0; i < log2_diff; i++) {

  1430.                 int m = 1 << i;

  1431.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1432.             }

  1433.             pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;

  1434.         }

  1435.     }

  1436. 

  1437.     return 0;

  1438. }

  1439. 

  1440. int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,

  1441.                            HEVCParamSets *ps)

  1442. {

  1443.     HEVCSPS      *sps = NULL;

  1444.     int i, ret = 0;

  1445.     unsigned int pps_id = 0;

  1446.     ptrdiff_t nal_size;

  1447.     unsigned log2_parallel_merge_level_minus2;

  1448. 

  1449.     AVBufferRef *pps_buf;

  1450.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1451. 

  1452.     if (!pps)

  1453.         return AVERROR(ENOMEM);

  1454. 

  1455.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1456.                                hevc_pps_free, NULL, 0);

  1457.     if (!pps_buf) {

  1458.         av_freep(&pps);

  1459.         return AVERROR(ENOMEM);

  1460.     }

  1461. 

  1462.     av_log(avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1463. 

  1464.     nal_size = gb->buffer_end - gb->buffer;

  1465.     if (nal_size > sizeof(pps->data)) {

  1466.         av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "

  1467.                "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",

  1468.                nal_size, sizeof(pps->data));

  1469.         pps->data_size = sizeof(pps->data);

  1470.     } else {

  1471.         pps->data_size = nal_size;

  1472.     }

  1473.     memcpy(pps->data, gb->buffer, pps->data_size);

  1474. 

  1475.     // Default values

  1476.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1477.     pps->num_tile_columns                      = 1;

  1478.     pps->num_tile_rows                         = 1;

  1479.     pps->uniform_spacing_flag                  = 1;

  1480.     pps->disable_dbf                           = 0;

  1481.     pps->beta_offset                           = 0;

  1482.     pps->tc_offset                             = 0;

  1483.     pps->log2_max_transform_skip_block_size    = 2;

  1484. 

  1485.     // Coded parameters

  1486.     pps_id = get_ue_golomb_long(gb);

  1487.     if (pps_id >= HEVC_MAX_PPS_COUNT) {

  1488.         av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1489.         ret = AVERROR_INVALIDDATA;

  1490.         goto err;

  1491.     }

  1492.     pps->sps_id = get_ue_golomb_long(gb);

  1493.     if (pps->sps_id >= HEVC_MAX_SPS_COUNT) {

  1494.         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1495.         ret = AVERROR_INVALIDDATA;

  1496.         goto err;

  1497.     }

  1498.     if (!ps->sps_list[pps->sps_id]) {

  1499.         av_log(avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1500.         ret = AVERROR_INVALIDDATA;

  1501.         goto err;

  1502.     }

  1503.     sps = (HEVCSPS *)ps->sps_list[pps->sps_id]->data;

  1504. 

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

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

  1507.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1508. 

  1509.     pps->sign_data_hiding_flag = get_bits1(gb);

  1510. 

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

  1512. 

  1513.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1514.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1515. 

  1516.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1517. 

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

  1519.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1520. 

  1521.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1522.     pps->diff_cu_qp_delta_depth   = 0;

  1523.     if (pps->cu_qp_delta_enabled_flag)

  1524.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1525. 

  1526.     if (pps->diff_cu_qp_delta_depth < 0 ||

  1527.         pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {

  1528.         av_log(avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",

  1529.                pps->diff_cu_qp_delta_depth);

  1530.         ret = AVERROR_INVALIDDATA;

  1531.         goto err;

  1532.     }

  1533. 

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

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

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

  1537.                pps->cb_qp_offset);

  1538.         ret = AVERROR_INVALIDDATA;

  1539.         goto err;

  1540.     }

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

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

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

  1544.                pps->cr_qp_offset);

  1545.         ret = AVERROR_INVALIDDATA;

  1546.         goto err;

  1547.     }

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

  1549. 

  1550.     pps->weighted_pred_flag   = get_bits1(gb);

  1551.     pps->weighted_bipred_flag = get_bits1(gb);

  1552. 

  1553.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1554.     pps->tiles_enabled_flag               = get_bits1(gb);

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

  1556. 

  1557.     if (pps->tiles_enabled_flag) {

  1558.         pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

  1559.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

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

  1561.             pps->num_tile_columns >= sps->width) {

  1562.             av_log(avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1563.                    pps->num_tile_columns - 1);

  1564.             ret = AVERROR_INVALIDDATA;

  1565.             goto err;

  1566.         }

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

  1568.             pps->num_tile_rows >= sps->height) {

  1569.             av_log(avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1570.                    pps->num_tile_rows - 1);

  1571.             ret = AVERROR_INVALIDDATA;

  1572.             goto err;

  1573.         }

  1574. 

  1575.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1576.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1577.         if (!pps->column_width || !pps->row_height) {

  1578.             ret = AVERROR(ENOMEM);

  1579.             goto err;

  1580.         }

  1581. 

  1582.         pps->uniform_spacing_flag = get_bits1(gb);

  1583.         if (!pps->uniform_spacing_flag) {

  1584.             uint64_t sum = 0;

  1585.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1586.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1587.                 sum                 += pps->column_width[i];

  1588.             }

  1589.             if (sum >= sps->ctb_width) {

  1590.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1591.                 ret = AVERROR_INVALIDDATA;

  1592.                 goto err;

  1593.             }

  1594.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1595. 

  1596.             sum = 0;

  1597.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1598.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1599.                 sum               += pps->row_height[i];

  1600.             }

  1601.             if (sum >= sps->ctb_height) {

  1602.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1603.                 ret = AVERROR_INVALIDDATA;

  1604.                 goto err;

  1605.             }

  1606.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1607.         }

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

  1609.     }

  1610. 

  1611.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1612. 

  1613.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1614.     if (pps->deblocking_filter_control_present_flag) {

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

  1616.         pps->disable_dbf                             = get_bits1(gb);

  1617.         if (!pps->disable_dbf) {

  1618.             int beta_offset_div2 = get_se_golomb(gb);

  1619.             int tc_offset_div2   = get_se_golomb(gb) ;

  1620.             if (beta_offset_div2 < -6 || beta_offset_div2 > 6) {

  1621.                 av_log(avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1622.                        beta_offset_div2);

  1623.                 ret = AVERROR_INVALIDDATA;

  1624.                 goto err;

  1625.             }

  1626.             if (tc_offset_div2 < -6 || tc_offset_div2 > 6) {

  1627.                 av_log(avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1628.                        tc_offset_div2);

  1629.                 ret = AVERROR_INVALIDDATA;

  1630.                 goto err;

  1631.             }

  1632.             pps->beta_offset = 2 * beta_offset_div2;

  1633.             pps->tc_offset   = 2 *   tc_offset_div2;

  1634.         }

  1635.     }

  1636. 

  1637.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1638.     if (pps->scaling_list_data_present_flag) {

  1639.         set_default_scaling_list_data(&pps->scaling_list);

  1640.         ret = scaling_list_data(gb, avctx, &pps->scaling_list, sps);

  1641.         if (ret < 0)

  1642.             goto err;

  1643.     }

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

  1645.     log2_parallel_merge_level_minus2     = get_ue_golomb_long(gb);

  1646.     if (log2_parallel_merge_level_minus2 > sps->log2_ctb_size) {

  1647.         av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1648.                log2_parallel_merge_level_minus2);

  1649.         ret = AVERROR_INVALIDDATA;

  1650.         goto err;

  1651.     }

  1652.     pps->log2_parallel_merge_level       = log2_parallel_merge_level_minus2 + 2;

  1653. 

  1654.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1655. 

  1656.     if (get_bits1(gb)) { // pps_extension_present_flag

  1657.         int pps_range_extensions_flag = get_bits1(gb);

  1658.         /* int pps_extension_7bits = */ get_bits(gb, 7);

  1659.         if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {

  1660.             if ((ret = pps_range_extensions(gb, avctx, pps, sps)) < 0)

  1661.                 goto err;

  1662.         }

  1663.     }

  1664. 

  1665.     ret = setup_pps(avctx, gb, pps, sps);

  1666.     if (ret < 0)

  1667.         goto err;

  1668. 

  1669.     if (get_bits_left(gb) < 0) {

  1670.         av_log(avctx, AV_LOG_ERROR,

  1671.                "Overread PPS by %d bits\n", -get_bits_left(gb));

  1672.         goto err;

  1673.     }

  1674. 

  1675.     remove_pps(ps, pps_id);

  1676.     ps->pps_list[pps_id] = pps_buf;

  1677. 

  1678.     return 0;

  1679. 

  1680. err:

  1681.     av_buffer_unref(&pps_buf);

  1682.     return ret;

  1683. }

  1684. 

  1685. int ff_hevc_compute_poc(const HEVCSPS *sps, int pocTid0, int poc_lsb, int nal_unit_type)

  1686. {

  1687.     int max_poc_lsb  = 1 << sps->log2_max_poc_lsb;

  1688.     int prev_poc_lsb = pocTid0 % max_poc_lsb;

  1689.     int prev_poc_msb = pocTid0 - prev_poc_lsb;

  1690.     int poc_msb;

  1691. 

  1692.     if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)

  1693.         poc_msb = prev_poc_msb + max_poc_lsb;

  1694.     else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)

  1695.         poc_msb = prev_poc_msb - max_poc_lsb;

  1696.     else

  1697.         poc_msb = prev_poc_msb;

  1698. 

  1699.     // For BLA picture types, POCmsb is set to 0.

  1700.     if (nal_unit_type == HEVC_NAL_BLA_W_LP   ||

  1701.         nal_unit_type == HEVC_NAL_BLA_W_RADL ||

  1702.         nal_unit_type == HEVC_NAL_BLA_N_LP)

  1703.         poc_msb = 0;

  1704. 

  1705.     return poc_msb + poc_lsb;

  1706. }