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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 Libav.

  10.  *

  11.  * Libav 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.  * Libav 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 Libav; 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. 

  28. #include "golomb.h"

  29. #include "hevc.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(HEVCContext *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(HEVCContext *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_buffer_unref(&s->sps_list[id]);

  93. }

  94. 

  95. static void remove_vps(HEVCContext *s, int id)

  96. {

  97.     int i;

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

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

  100.             s->vps = NULL;

  101. 

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

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

  104.                 remove_sps(s, i);

  105.     }

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

  107. }

  108. 

  109. int ff_hevc_decode_short_term_rps(HEVCContext *s, ShortTermRPS *rps,

  110.                                   const HEVCSPS *sps, int is_slice_header)

  111. {

  112.     HEVCLocalContext *lc = &s->HEVClc;

  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.     GetBitContext *gb = &lc->gb;

  121. 

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

  123.         rps_predict = get_bits1(gb);

  124. 

  125.     if (rps_predict) {

  126.         const ShortTermRPS *rps_ridx;

  127.         int delta_rps, 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(s->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.         } 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.         delta_rps      = (1 - (delta_rps_sign << 1)) * abs_delta_rps;

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

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

  148. 

  149.             if (!used)

  150.                 use_delta_flag = get_bits1(gb);

  151. 

  152.             if (used || use_delta_flag) {

  153.                 if (i < rps_ridx->num_delta_pocs)

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

  155.                 else

  156.                     delta_poc = delta_rps;

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

  158.                 if (delta_poc < 0)

  159.                     k0++;

  160.                 else

  161.                     k1++;

  162.                 k++;

  163.             }

  164.         }

  165. 

  166.         rps->num_delta_pocs    = k;

  167.         rps->num_negative_pics = k0;

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

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

  170.             int used, tmp;

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

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

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

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

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

  176.                     if (delta_poc < tmp) {

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

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

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

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

  181.                     }

  182.                 }

  183.             }

  184.         }

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

  186.             int used;

  187.             k = rps->num_negative_pics - 1;

  188.             // flip the negative values to largest first

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

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

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

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

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

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

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

  196.                 k--;

  197.             }

  198.         }

  199.     } else {

  200.         unsigned int prev, nb_positive_pics;

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

  202.         nb_positive_pics       = get_ue_golomb_long(gb);

  203. 

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

  205.             nb_positive_pics >= MAX_REFS) {

  206.             av_log(s->avctx, AV_LOG_ERROR, "Too many refs in a short term RPS.\n");

  207.             return AVERROR_INVALIDDATA;

  208.         }

  209. 

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

  211.         if (rps->num_delta_pocs) {

  212.             prev = 0;

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

  214.                 delta_poc = get_ue_golomb_long(gb) + 1;

  215.                 prev -= delta_poc;

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

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

  218.             }

  219.             prev = 0;

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

  221.                 delta_poc = get_ue_golomb_long(gb) + 1;

  222.                 prev += delta_poc;

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

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

  225.             }

  226.         }

  227.     }

  228.     return 0;

  229. }

  230. 

  231. 

  232. static void decode_profile_tier_level(HEVCContext *s, PTLCommon *ptl)

  233. {

  234.     int i;

  235.     GetBitContext *gb = &s->HEVClc.gb;

  236. 

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

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

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

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

  241.         av_log(s->avctx, AV_LOG_DEBUG, "Main profile bitstream\n");

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

  243.         av_log(s->avctx, AV_LOG_DEBUG, "Main 10 profile bitstream\n");

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

  245.         av_log(s->avctx, AV_LOG_DEBUG, "Main Still Picture profile bitstream\n");

  246.     else

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

  248. 

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

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

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

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

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

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

  255. 

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

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

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

  259. }

  260. 

  261. static void parse_ptl(HEVCContext *s, PTL *ptl, int max_num_sub_layers)

  262. {

  263.     int i;

  264.     GetBitContext *gb = &s->HEVClc.gb;

  265.     decode_profile_tier_level(s, &ptl->general_ptl);

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

  267. 

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

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

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

  271.     }

  272.     if (max_num_sub_layers - 1 > 0)

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

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

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

  276.         if (ptl->sub_layer_profile_present_flag[i])

  277.             decode_profile_tier_level(s, &ptl->sub_layer_ptl[i]);

  278.         if (ptl->sub_layer_level_present_flag[i])

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

  280.     }

  281. }

  282. 

  283. static void decode_sublayer_hrd(HEVCContext *s, unsigned int nb_cpb,

  284.                                 int subpic_params_present)

  285. {

  286.     GetBitContext *gb = &s->HEVClc.gb;

  287.     int i;

  288. 

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

  290.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  291.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  292. 

  293.         if (subpic_params_present) {

  294.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  295.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  296.         }

  297.         skip_bits1(gb); // cbr_flag

  298.     }

  299. }

  300. 

  301. static void decode_hrd(HEVCContext *s, int common_inf_present,

  302.                        int max_sublayers)

  303. {

  304.     GetBitContext *gb = &s->HEVClc.gb;

  305.     int nal_params_present = 0, vcl_params_present = 0;

  306.     int subpic_params_present = 0;

  307.     int i;

  308. 

  309.     if (common_inf_present) {

  310.         nal_params_present = get_bits1(gb);

  311.         vcl_params_present = get_bits1(gb);

  312. 

  313.         if (nal_params_present || vcl_params_present) {

  314.             subpic_params_present = get_bits1(gb);

  315. 

  316.             if (subpic_params_present) {

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

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

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

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

  321.             }

  322. 

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

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

  325. 

  326.             if (subpic_params_present)

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

  328. 

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

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

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

  332.         }

  333.     }

  334. 

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

  336.         int low_delay = 0;

  337.         unsigned int nb_cpb = 1;

  338.         int fixed_rate = get_bits1(gb);

  339. 

  340.         if (!fixed_rate)

  341.             fixed_rate = get_bits1(gb);

  342. 

  343.         if (fixed_rate)

  344.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  345.         else

  346.             low_delay = get_bits1(gb);

  347. 

  348.         if (!low_delay)

  349.             nb_cpb = get_ue_golomb_long(gb) + 1;

  350. 

  351.         if (nal_params_present)

  352.             decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

  353.         if (vcl_params_present)

  354.             decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

  355.     }

  356. }

  357. 

  358. int ff_hevc_decode_nal_vps(HEVCContext *s)

  359. {

  360.     int i,j;

  361.     GetBitContext *gb = &s->HEVClc.gb;

  362.     int vps_id = 0;

  363.     HEVCVPS *vps;

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

  365. 

  366.     if (!vps_buf)

  367.         return AVERROR(ENOMEM);

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

  369. 

  370.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding VPS\n");

  371. 

  372.     vps_id = get_bits(gb, 4);

  373.     if (vps_id >= MAX_VPS_COUNT) {

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

  375.         goto err;

  376.     }

  377. 

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

  379.         av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_three_2bits is not three\n");

  380.         goto err;

  381.     }

  382. 

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

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

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

  386. 

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

  388.         av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_ffff_16bits is not 0xffff\n");

  389.         goto err;

  390.     }

  391. 

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

  393.         av_log(s->avctx, AV_LOG_ERROR, "vps_max_sub_layers out of range: %d\n",

  394.                vps->vps_max_sub_layers);

  395.         goto err;

  396.     }

  397. 

  398.     parse_ptl(s, &vps->ptl, vps->vps_max_sub_layers);

  399. 

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

  401. 

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

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

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

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

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

  407. 

  408.         if (vps->vps_max_dec_pic_buffering[i] > MAX_DPB_SIZE) {

  409.             av_log(s->avctx, AV_LOG_ERROR, "vps_max_dec_pic_buffering_minus1 out of range: %d\n",

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

  411.             goto err;

  412.         }

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

  414.             av_log(s->avctx, AV_LOG_WARNING, "vps_max_num_reorder_pics out of range: %d\n",

  415.                    vps->vps_num_reorder_pics[i]);

  416.             if (s->avctx->err_recognition & AV_EF_EXPLODE)

  417.                 goto err;

  418.         }

  419.     }

  420. 

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

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

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

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

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

  426. 

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

  428.     if (vps->vps_timing_info_present_flag) {

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

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

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

  432.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  436.             int common_inf_present = 1;

  437. 

  438.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  439.             if (i)

  440.                 common_inf_present = get_bits1(gb);

  441.             decode_hrd(s, common_inf_present, vps->vps_max_sub_layers);

  442.         }

  443.     }

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

  445. 

  446.     if (s->vps_list[vps_id] &&

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

  448.         av_buffer_unref(&vps_buf);

  449.     } else {

  450.         remove_vps(s, vps_id);

  451.         s->vps_list[vps_id] = vps_buf;

  452.     }

  453. 

  454.     return 0;

  455. 

  456. err:

  457.     av_buffer_unref(&vps_buf);

  458.     return AVERROR_INVALIDDATA;

  459. }

  460. 

  461. static void decode_vui(HEVCContext *s, HEVCSPS *sps)

  462. {

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

  464.     GetBitContext *gb = &s->HEVClc.gb;

  465.     int sar_present;

  466. 

  467.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding VUI\n");

  468. 

  469.     sar_present = get_bits1(gb);

  470.     if (sar_present) {

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

  472.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  474.         else if (sar_idx == 255) {

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

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

  477.         } else

  478.             av_log(s->avctx, AV_LOG_WARNING,

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

  480.     }

  481. 

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

  483.     if (vui->overscan_info_present_flag)

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

  485. 

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

  487.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  492.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  493.         if (vui->colour_description_present_flag) {

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

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

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

  497. 

  498.             // Set invalid values to "unspecified"

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

  500.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  502.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  504.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

  505.         }

  506.     }

  507. 

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

  509.     if (vui->chroma_loc_info_present_flag) {

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

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

  512.     }

  513. 

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

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

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

  517. 

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

  519.     if (vui->default_display_window_flag) {

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

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

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

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

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

  525. 

  526.         if (s->apply_defdispwin &&

  527.             s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {

  528.             av_log(s->avctx, AV_LOG_DEBUG,

  529.                    "discarding vui default display window, "

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

  531.                    vui->def_disp_win.left_offset,

  532.                    vui->def_disp_win.right_offset,

  533.                    vui->def_disp_win.top_offset,

  534.                    vui->def_disp_win.bottom_offset);

  535. 

  536.             vui->def_disp_win.left_offset   =

  537.             vui->def_disp_win.right_offset  =

  538.             vui->def_disp_win.top_offset    =

  539.             vui->def_disp_win.bottom_offset = 0;

  540.         }

  541.     }

  542. 

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

  544.     if (vui->vui_timing_info_present_flag) {

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

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

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

  548.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  551.         if (vui->vui_hrd_parameters_present_flag)

  552.             decode_hrd(s, 1, sps->max_sub_layers);

  553.     }

  554. 

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

  556.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  565.     }

  566. }

  567. 

  568. static void set_default_scaling_list_data(ScalingList *sl)

  569. {

  570.     int matrixId;

  571. 

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

  573.         // 4x4 default is 16

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

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

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

  577.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  592. }

  593. 

  594. static int scaling_list_data(HEVCContext *s, ScalingList *sl)

  595. {

  596.     GetBitContext *gb = &s->HEVClc.gb;

  597.     uint8_t scaling_list_pred_mode_flag[4][6];

  598.     int32_t scaling_list_dc_coef[2][6];

  599.     int size_id, matrix_id, i, pos;

  600. 

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

  602.         for (matrix_id = 0; matrix_id < (size_id == 3 ? 2 : 6); matrix_id++) {

  603.             scaling_list_pred_mode_flag[size_id][matrix_id] = get_bits1(gb);

  604.             if (!scaling_list_pred_mode_flag[size_id][matrix_id]) {

  605.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  608.                 if (delta) {

  609.                     // Copy from previous array.

  610.                     if (matrix_id < delta) {

  611.                         av_log(s->avctx, AV_LOG_ERROR,

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

  613.                         return AVERROR_INVALIDDATA;

  614.                     }

  615. 

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

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

  618.                            size_id > 0 ? 64 : 16);

  619.                     if (size_id > 1)

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

  621.                 }

  622.             } else {

  623.                 int next_coef, coef_num;

  624.                 int32_t scaling_list_delta_coef;

  625. 

  626.                 next_coef = 8;

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

  628.                 if (size_id > 1) {

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

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

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

  632.                 }

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

  634.                     if (size_id == 0)

  635.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  636.                                   ff_hevc_diag_scan4x4_x[i];

  637.                     else

  638.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  639.                                   ff_hevc_diag_scan8x8_x[i];

  640. 

  641.                     scaling_list_delta_coef = get_se_golomb(gb);

  642.                     next_coef = (next_coef + scaling_list_delta_coef + 256) % 256;

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

  644.                 }

  645.             }

  646.         }

  647. 

  648.     return 0;

  649. }

  650. 

  651. int ff_hevc_decode_nal_sps(HEVCContext *s)

  652. {

  653.     const AVPixFmtDescriptor *desc;

  654.     GetBitContext *gb = &s->HEVClc.gb;

  655.     int ret = 0;

  656.     unsigned int sps_id = 0;

  657.     int log2_diff_max_min_transform_block_size;

  658.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  659.     int i;

  660. 

  661.     HEVCSPS *sps;

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

  663. 

  664.     if (!sps_buf)

  665.         return AVERROR(ENOMEM);

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

  667. 

  668.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding SPS\n");

  669. 

  670.     // Coded parameters

  671. 

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

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

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

  675.         ret = AVERROR_INVALIDDATA;

  676.         goto err;

  677.     }

  678. 

  679.     if (!s->vps_list[sps->vps_id]) {

  680.         av_log(s->avctx, AV_LOG_ERROR, "VPS %d does not exist\n",

  681.                sps->vps_id);

  682.         ret = AVERROR_INVALIDDATA;

  683.         goto err;

  684.     }

  685. 

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

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

  688.         av_log(s->avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n",

  689.                sps->max_sub_layers);

  690.         ret = AVERROR_INVALIDDATA;

  691.         goto err;

  692.     }

  693. 

  694.     skip_bits1(gb); // temporal_id_nesting_flag

  695. 

  696.     parse_ptl(s, &sps->ptl, sps->max_sub_layers);

  697. 

  698.     sps_id = get_ue_golomb_long(gb);

  699.     if (sps_id >= MAX_SPS_COUNT) {

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

  701.         ret = AVERROR_INVALIDDATA;

  702.         goto err;

  703.     }

  704. 

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

  706.     if (sps->chroma_format_idc != 1) {

  707.         avpriv_report_missing_feature(s->avctx, "chroma_format_idc != 1\n");

  708.         ret = AVERROR_PATCHWELCOME;

  709.         goto err;

  710.     }

  711. 

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

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

  714. 

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

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

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

  718.                                    sps->height, 0, s->avctx)) < 0)

  719.         goto err;

  720. 

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

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

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

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

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

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

  727. 

  728.         if (s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {

  729.             av_log(s->avctx, AV_LOG_DEBUG,

  730.                    "discarding sps conformance window, "

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

  732.                    sps->pic_conf_win.left_offset,

  733.                    sps->pic_conf_win.right_offset,

  734.                    sps->pic_conf_win.top_offset,

  735.                    sps->pic_conf_win.bottom_offset);

  736. 

  737.             sps->pic_conf_win.left_offset   =

  738.             sps->pic_conf_win.right_offset  =

  739.             sps->pic_conf_win.top_offset    =

  740.             sps->pic_conf_win.bottom_offset = 0;

  741.         }

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

  743.     }

  744. 

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

  746.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

  747.     if (bit_depth_chroma != sps->bit_depth) {

  748.         av_log(s->avctx, AV_LOG_ERROR,

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

  750.                "this is unsupported.\n",

  751.                sps->bit_depth, bit_depth_chroma);

  752.         ret = AVERROR_INVALIDDATA;

  753.         goto err;

  754.     }

  755. 

  756.     if (sps->chroma_format_idc == 1) {

  757.         switch (sps->bit_depth) {

  758.         case 8:  sps->pix_fmt = AV_PIX_FMT_YUV420P;   break;

  759.         case 9:  sps->pix_fmt = AV_PIX_FMT_YUV420P9;  break;

  760.         case 10: sps->pix_fmt = AV_PIX_FMT_YUV420P10; break;

  761.         default:

  762.             av_log(s->avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n",

  763.                    sps->bit_depth);

  764.             ret = AVERROR_PATCHWELCOME;

  765.             goto err;

  766.         }

  767.     } else {

  768.         av_log(s->avctx, AV_LOG_ERROR,

  769.                "non-4:2:0 support is currently unspecified.\n");

  770.         return AVERROR_PATCHWELCOME;

  771.     }

  772. 

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

  774.     if (!desc) {

  775.         ret = AVERROR(EINVAL);

  776.         goto err;

  777.     }

  778. 

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

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

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

  782. 

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

  784. 

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

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

  787.         av_log(s->avctx, AV_LOG_ERROR, "log2_max_pic_order_cnt_lsb_minus4 out range: %d\n",

  788.                sps->log2_max_poc_lsb - 4);

  789.         ret = AVERROR_INVALIDDATA;

  790.         goto err;

  791.     }

  792. 

  793.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

  800.             av_log(s->avctx, AV_LOG_ERROR, "sps_max_dec_pic_buffering_minus1 out of range: %d\n",

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

  802.             ret = AVERROR_INVALIDDATA;

  803.             goto err;

  804.         }

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

  806.             av_log(s->avctx, AV_LOG_WARNING, "sps_max_num_reorder_pics out of range: %d\n",

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

  808.             if (s->avctx->err_recognition & AV_EF_EXPLODE ||

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

  810.                 ret = AVERROR_INVALIDDATA;

  811.                 goto err;

  812.             }

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

  814.         }

  815.     }

  816. 

  817.     if (!sublayer_ordering_info) {

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

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

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

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

  822.         }

  823.     }

  824. 

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

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

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

  828.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  829.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  830.                                                sps->log2_min_tb_size;

  831. 

  832.     if (sps->log2_min_tb_size >= sps->log2_min_cb_size) {

  833.         av_log(s->avctx, AV_LOG_ERROR, "Invalid value for log2_min_tb_size");

  834.         ret = AVERROR_INVALIDDATA;

  835.         goto err;

  836.     }

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

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

  839. 

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

  841.     if (sps->scaling_list_enable_flag) {

  842.         set_default_scaling_list_data(&sps->scaling_list);

  843. 

  844.         if (get_bits1(gb)) {

  845.             ret = scaling_list_data(s, &sps->scaling_list);

  846.             if (ret < 0)

  847.                 goto err;

  848.         }

  849.     }

  850. 

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

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

  853. 

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

  855.     if (sps->pcm_enabled_flag) {

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

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

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

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

  860.                                         get_ue_golomb_long(gb);

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

  862.             av_log(s->avctx, AV_LOG_ERROR,

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

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

  865.             ret = AVERROR_INVALIDDATA;

  866.             goto err;

  867.         }

  868. 

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

  870.     }

  871. 

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

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

  874.         av_log(s->avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",

  875.                sps->nb_st_rps);

  876.         ret = AVERROR_INVALIDDATA;

  877.         goto err;

  878.     }

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

  880.         if ((ret = ff_hevc_decode_short_term_rps(s, &sps->st_rps[i],

  881.                                                  sps, 0)) < 0)

  882.             goto err;

  883.     }

  884. 

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

  886.     if (sps->long_term_ref_pics_present_flag) {

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

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

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

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

  891.         }

  892.     }

  893. 

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

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

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

  897.     vui_present = get_bits1(gb);

  898.     if (vui_present)

  899.         decode_vui(s, sps);

  900.     skip_bits1(gb); // sps_extension_flag

  901. 

  902.     if (s->apply_defdispwin) {

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

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

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

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

  907.     }

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

  909.         !(s->avctx->flags & CODEC_FLAG_UNALIGNED)) {

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

  911.         av_log(s->avctx, AV_LOG_WARNING, "Reducing left output window to %d "

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

  913.                sps->output_window.left_offset);

  914.     }

  915.     sps->output_width  = sps->width -

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

  917.     sps->output_height = sps->height -

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

  919.     if (sps->output_width <= 0 || sps->output_height <= 0) {

  920.         av_log(s->avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",

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

  922.         if (s->avctx->err_recognition & AV_EF_EXPLODE) {

  923.             ret = AVERROR_INVALIDDATA;

  924.             goto err;

  925.         }

  926.         av_log(s->avctx, AV_LOG_WARNING,

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

  928.         sps->output_window.left_offset   =

  929.         sps->output_window.right_offset  =

  930.         sps->output_window.top_offset    =

  931.         sps->output_window.bottom_offset = 0;

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

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

  934.     }

  935. 

  936.     // Inferred parameters

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

  938.                          sps->log2_diff_max_min_coding_block_size;

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

  940. 

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

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

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

  944. 

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

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

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

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

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

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

  951. 

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

  953. 

  954.     if (sps->width  & ((1 << sps->log2_min_cb_size) - 1) ||

  955.         sps->height & ((1 << sps->log2_min_cb_size) - 1)) {

  956.         av_log(s->avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  957.         goto err;

  958.     }

  959. 

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

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

  962.         goto err;

  963.     }

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

  965.         av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

  966.                sps->max_transform_hierarchy_depth_inter);

  967.         goto err;

  968.     }

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

  970.         av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  971.                sps->max_transform_hierarchy_depth_intra);

  972.         goto err;

  973.     }

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

  975.         av_log(s->avctx, AV_LOG_ERROR,

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

  977.                sps->log2_max_trafo_size);

  978.         goto err;

  979.     }

  980. 

  981.     if (s->avctx->debug & FF_DEBUG_BITSTREAM) {

  982.         av_log(s->avctx, AV_LOG_DEBUG,

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

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

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

  986.                sps->output_width, sps->output_height,

  987.                av_get_pix_fmt_name(sps->pix_fmt));

  988.     }

  989. 

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

  991.      * original one.

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

  993.     if (s->sps_list[sps_id] &&

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

  995.         av_buffer_unref(&sps_buf);

  996.     } else {

  997.         remove_sps(s, sps_id);

  998.         s->sps_list[sps_id] = sps_buf;

  999.     }

  1000. 

  1001.     return 0;

  1002. 

  1003. err:

  1004.     av_buffer_unref(&sps_buf);

  1005.     return ret;

  1006. }

  1007. 

  1008. static void hevc_pps_free(void *opaque, uint8_t *data)

  1009. {

  1010.     HEVCPPS *pps = (HEVCPPS*)data;

  1011. 

  1012.     av_freep(&pps->column_width);

  1013.     av_freep(&pps->row_height);

  1014.     av_freep(&pps->col_bd);

  1015.     av_freep(&pps->row_bd);

  1016.     av_freep(&pps->col_idxX);

  1017.     av_freep(&pps->ctb_addr_rs_to_ts);

  1018.     av_freep(&pps->ctb_addr_ts_to_rs);

  1019.     av_freep(&pps->tile_pos_rs);

  1020.     av_freep(&pps->tile_id);

  1021.     av_freep(&pps->min_tb_addr_zs);

  1022. 

  1023.     av_freep(&pps);

  1024. }

  1025. 

  1026. int ff_hevc_decode_nal_pps(HEVCContext *s)

  1027. {

  1028.     GetBitContext *gb = &s->HEVClc.gb;

  1029.     HEVCSPS      *sps = NULL;

  1030.     int pic_area_in_ctbs, pic_area_in_min_tbs;

  1031.     int log2_diff_ctb_min_tb_size;

  1032.     int i, j, x, y, ctb_addr_rs, tile_id;

  1033.     int ret = 0;

  1034.     unsigned int pps_id = 0;

  1035. 

  1036.     AVBufferRef *pps_buf;

  1037.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1038. 

  1039.     if (!pps)

  1040.         return AVERROR(ENOMEM);

  1041. 

  1042.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1043.                                hevc_pps_free, NULL, 0);

  1044.     if (!pps_buf) {

  1045.         av_freep(&pps);

  1046.         return AVERROR(ENOMEM);

  1047.     }

  1048. 

  1049.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1050. 

  1051.     // Default values

  1052.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1053.     pps->num_tile_columns                      = 1;

  1054.     pps->num_tile_rows                         = 1;

  1055.     pps->uniform_spacing_flag                  = 1;

  1056.     pps->disable_dbf                           = 0;

  1057.     pps->beta_offset                           = 0;

  1058.     pps->tc_offset                             = 0;

  1059. 

  1060.     // Coded parameters

  1061.     pps_id = get_ue_golomb_long(gb);

  1062.     if (pps_id >= MAX_PPS_COUNT) {

  1063.         av_log(s->avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1064.         ret = AVERROR_INVALIDDATA;

  1065.         goto err;

  1066.     }

  1067.     pps->sps_id = get_ue_golomb_long(gb);

  1068.     if (pps->sps_id >= MAX_SPS_COUNT) {

  1069.         av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1070.         ret = AVERROR_INVALIDDATA;

  1071.         goto err;

  1072.     }

  1073.     if (!s->sps_list[pps->sps_id]) {

  1074.         av_log(s->avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1075.         ret = AVERROR_INVALIDDATA;

  1076.         goto err;

  1077.     }

  1078.     sps = (HEVCSPS *)s->sps_list[pps->sps_id]->data;

  1079. 

  1080.     pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

  1081.     pps->output_flag_present_flag              = get_bits1(gb);

  1082.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1083. 

  1084.     pps->sign_data_hiding_flag = get_bits1(gb);

  1085. 

  1086.     pps->cabac_init_present_flag = get_bits1(gb);

  1087. 

  1088.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1089.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1090. 

  1091.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1092. 

  1093.     pps->constrained_intra_pred_flag = get_bits1(gb);

  1094.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1095. 

  1096.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1097.     pps->diff_cu_qp_delta_depth   = 0;

  1098.     if (pps->cu_qp_delta_enabled_flag)

  1099.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1100. 

  1101.     pps->cb_qp_offset = get_se_golomb(gb);

  1102.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1103.         av_log(s->avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1104.                pps->cb_qp_offset);

  1105.         ret = AVERROR_INVALIDDATA;

  1106.         goto err;

  1107.     }

  1108.     pps->cr_qp_offset = get_se_golomb(gb);

  1109.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1110.         av_log(s->avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1111.                pps->cr_qp_offset);

  1112.         ret = AVERROR_INVALIDDATA;

  1113.         goto err;

  1114.     }

  1115.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1116. 

  1117.     pps->weighted_pred_flag   = get_bits1(gb);

  1118.     pps->weighted_bipred_flag = get_bits1(gb);

  1119. 

  1120.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1121.     pps->tiles_enabled_flag               = get_bits1(gb);

  1122.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1123. 

  1124.     if (pps->tiles_enabled_flag) {

  1125.         pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

  1126.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

  1127.         if (pps->num_tile_columns == 0 ||

  1128.             pps->num_tile_columns >= sps->width) {

  1129.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1130.                    pps->num_tile_columns - 1);

  1131.             ret = AVERROR_INVALIDDATA;

  1132.             goto err;

  1133.         }

  1134.         if (pps->num_tile_rows == 0 ||

  1135.             pps->num_tile_rows >= sps->height) {

  1136.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1137.                    pps->num_tile_rows - 1);

  1138.             ret = AVERROR_INVALIDDATA;

  1139.             goto err;

  1140.         }

  1141. 

  1142.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1143.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1144.         if (!pps->column_width || !pps->row_height) {

  1145.             ret = AVERROR(ENOMEM);

  1146.             goto err;

  1147.         }

  1148. 

  1149.         pps->uniform_spacing_flag = get_bits1(gb);

  1150.         if (!pps->uniform_spacing_flag) {

  1151.             uint64_t sum = 0;

  1152.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1153.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1154.                 sum                 += pps->column_width[i];

  1155.             }

  1156.             if (sum >= sps->ctb_width) {

  1157.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1158.                 ret = AVERROR_INVALIDDATA;

  1159.                 goto err;

  1160.             }

  1161.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1162. 

  1163.             sum = 0;

  1164.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1165.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1166.                 sum               += pps->row_height[i];

  1167.             }

  1168.             if (sum >= sps->ctb_height) {

  1169.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1170.                 ret = AVERROR_INVALIDDATA;

  1171.                 goto err;

  1172.             }

  1173.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1174.         }

  1175.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1176.     }

  1177. 

  1178.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1179. 

  1180.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1181.     if (pps->deblocking_filter_control_present_flag) {

  1182.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1183.         pps->disable_dbf                             = get_bits1(gb);

  1184.         if (!pps->disable_dbf) {

  1185.             pps->beta_offset = get_se_golomb(gb) * 2;

  1186.             pps->tc_offset = get_se_golomb(gb) * 2;

  1187.             if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

  1188.                 av_log(s->avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1189.                        pps->beta_offset/2);

  1190.                 ret = AVERROR_INVALIDDATA;

  1191.                 goto err;

  1192.             }

  1193.             if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

  1194.                 av_log(s->avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1195.                        pps->tc_offset/2);

  1196.                 ret = AVERROR_INVALIDDATA;

  1197.                 goto err;

  1198.             }

  1199.         }

  1200.     }

  1201. 

  1202.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1203.     if (pps->scaling_list_data_present_flag) {

  1204.         set_default_scaling_list_data(&pps->scaling_list);

  1205.         ret = scaling_list_data(s, &pps->scaling_list);

  1206.         if (ret < 0)

  1207.             goto err;

  1208.     }

  1209.     pps->lists_modification_present_flag = get_bits1(gb);

  1210.     pps->log2_parallel_merge_level       = get_ue_golomb_long(gb) + 2;

  1211.     if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {

  1212.         av_log(s->avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1213.                pps->log2_parallel_merge_level - 2);

  1214.         ret = AVERROR_INVALIDDATA;

  1215.         goto err;

  1216.     }

  1217. 

  1218.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1219.     skip_bits1(gb);     // pps_extension_flag

  1220. 

  1221.     // Inferred parameters

  1222.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1223.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1224.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1225.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX) {

  1226.         ret = AVERROR(ENOMEM);

  1227.         goto err;

  1228.     }

  1229. 

  1230.     if (pps->uniform_spacing_flag) {

  1231.         if (!pps->column_width) {

  1232.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1233.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1234.         }

  1235.         if (!pps->column_width || !pps->row_height) {

  1236.             ret = AVERROR(ENOMEM);

  1237.             goto err;

  1238.         }

  1239. 

  1240.         for (i = 0; i < pps->num_tile_columns; i++) {

  1241.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1242.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1243.         }

  1244. 

  1245.         for (i = 0; i < pps->num_tile_rows; i++) {

  1246.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1247.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1248.         }

  1249.     }

  1250. 

  1251.     pps->col_bd[0] = 0;

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

  1253.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1254. 

  1255.     pps->row_bd[0] = 0;

  1256.     for (i = 0; i < pps->num_tile_rows; i++)

  1257.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1258. 

  1259.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1260.         if (i > pps->col_bd[j])

  1261.             j++;

  1262.         pps->col_idxX[i] = j;

  1263.     }

  1264. 

  1265.     /**

  1266.      * 6.5

  1267.      */

  1268.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1269.     pic_area_in_min_tbs  = sps->min_tb_width * sps->min_tb_height;

  1270. 

  1271.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1272.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1273.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1274.     pps->min_tb_addr_zs    = av_malloc_array(pic_area_in_min_tbs, sizeof(*pps->min_tb_addr_zs));

  1275.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1276.         !pps->tile_id || !pps->min_tb_addr_zs) {

  1277.         ret = AVERROR(ENOMEM);

  1278.         goto err;

  1279.     }

  1280. 

  1281.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1282.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1283.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1284.         int tile_x = 0;

  1285.         int tile_y = 0;

  1286.         int val    = 0;

  1287. 

  1288.         for (i = 0; i < pps->num_tile_columns; i++) {

  1289.             if (tb_x < pps->col_bd[i + 1]) {

  1290.                 tile_x = i;

  1291.                 break;

  1292.             }

  1293.         }

  1294. 

  1295.         for (i = 0; i < pps->num_tile_rows; i++) {

  1296.             if (tb_y < pps->row_bd[i + 1]) {

  1297.                 tile_y = i;

  1298.                 break;

  1299.             }

  1300.         }

  1301. 

  1302.         for (i = 0; i < tile_x; i++)

  1303.             val += pps->row_height[tile_y] * pps->column_width[i];

  1304.         for (i = 0; i < tile_y; i++)

  1305.             val += sps->ctb_width * pps->row_height[i];

  1306. 

  1307.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1308.                tb_x - pps->col_bd[tile_x];

  1309. 

  1310.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1311.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1312.     }

  1313. 

  1314.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1315.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1316.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1317.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1318.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1319. 

  1320.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1321.     if (!pps->tile_pos_rs) {

  1322.         ret = AVERROR(ENOMEM);

  1323.         goto err;

  1324.     }

  1325. 

  1326.     for (j = 0; j < pps->num_tile_rows; j++)

  1327.         for (i = 0; i < pps->num_tile_columns; i++)

  1328.             pps->tile_pos_rs[j * pps->num_tile_columns + i] = pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1329. 

  1330.     log2_diff_ctb_min_tb_size = sps->log2_ctb_size - sps->log2_min_tb_size;

  1331.     for (y = 0; y < sps->min_tb_height; y++) {

  1332.         for (x = 0; x < sps->min_tb_width; x++) {

  1333.             int tb_x        = x >> log2_diff_ctb_min_tb_size;

  1334.             int tb_y        = y >> log2_diff_ctb_min_tb_size;

  1335.             int ctb_addr_rs = sps->ctb_width * tb_y + tb_x;

  1336.             int val         = pps->ctb_addr_rs_to_ts[ctb_addr_rs] <<

  1337.                               (log2_diff_ctb_min_tb_size * 2);

  1338.             for (i = 0; i < log2_diff_ctb_min_tb_size; i++) {

  1339.                 int m = 1 << i;

  1340.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1341.             }

  1342.             pps->min_tb_addr_zs[y * sps->min_tb_width + x] = val;

  1343.         }

  1344.     }

  1345. 

  1346.     remove_pps(s, pps_id);

  1347.     s->pps_list[pps_id] = pps_buf;

  1348. 

  1349.     return 0;

  1350. 

  1351. err:

  1352.     av_buffer_unref(&pps_buf);

  1353.     return ret;

  1354. }