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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(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_buffer_unref(&s->sps_list[id]);

  93. }

  94. 

  95. static void remove_vps(HEVCParamSets *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(GetBitContext *gb, AVCodecContext *avctx,

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

  111. {

  112.     uint8_t rps_predict = 0;

  113.     int delta_poc;

  114.     int k0 = 0;

  115.     int k1 = 0;

  116.     int k  = 0;

  117.     int i;

  118. 

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

  120.         rps_predict = get_bits1(gb);

  121. 

  122.     if (rps_predict) {

  123.         const ShortTermRPS *rps_ridx;

  124.         int delta_rps, abs_delta_rps;

  125.         uint8_t use_delta_flag = 0;

  126.         uint8_t delta_rps_sign;

  127. 

  128.         if (is_slice_header) {

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

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

  131.                 av_log(avctx, AV_LOG_ERROR,

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

  133.                        delta_idx, sps->nb_st_rps);

  134.                 return AVERROR_INVALIDDATA;

  135.             }

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

  137.         } else

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

  139. 

  140.         delta_rps_sign = get_bits1(gb);

  141.         abs_delta_rps  = get_ue_golomb_long(gb) + 1;

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

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

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

  145. 

  146.             if (!used)

  147.                 use_delta_flag = get_bits1(gb);

  148. 

  149.             if (used || use_delta_flag) {

  150.                 if (i < rps_ridx->num_delta_pocs)

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

  152.                 else

  153.                     delta_poc = delta_rps;

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

  155.                 if (delta_poc < 0)

  156.                     k0++;

  157.                 else

  158.                     k1++;

  159.                 k++;

  160.             }

  161.         }

  162. 

  163.         rps->num_delta_pocs    = k;

  164.         rps->num_negative_pics = k0;

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

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

  167.             int used, tmp;

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

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

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

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

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

  173.                     if (delta_poc < tmp) {

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

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

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

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

  178.                     }

  179.                 }

  180.             }

  181.         }

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

  183.             int used;

  184.             k = rps->num_negative_pics - 1;

  185.             // flip the negative values to largest first

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

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

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

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

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

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

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

  193.                 k--;

  194.             }

  195.         }

  196.     } else {

  197.         unsigned int prev, nb_positive_pics;

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

  199.         nb_positive_pics       = get_ue_golomb_long(gb);

  200. 

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

  202.             nb_positive_pics >= MAX_REFS) {

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

  204.             return AVERROR_INVALIDDATA;

  205.         }

  206. 

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

  208.         if (rps->num_delta_pocs) {

  209.             prev = 0;

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

  211.                 delta_poc = get_ue_golomb_long(gb) + 1;

  212.                 prev -= delta_poc;

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

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

  215.             }

  216.             prev = 0;

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

  218.                 delta_poc = get_ue_golomb_long(gb) + 1;

  219.                 prev += delta_poc;

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

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

  222.             }

  223.         }

  224.     }

  225.     return 0;

  226. }

  227. 

  228. 

  229. static void decode_profile_tier_level(GetBitContext *gb, AVCodecContext *avctx,

  230.                                       PTLCommon *ptl)

  231. {

  232.     int i;

  233. 

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

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

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

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

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

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

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

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

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

  243.     else

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

  245. 

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

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

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

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

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

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

  252. 

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

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

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

  256. }

  257. 

  258. static void parse_ptl(GetBitContext *gb, AVCodecContext *avctx,

  259.                       PTL *ptl, int max_num_sub_layers)

  260. {

  261.     int i;

  262.     decode_profile_tier_level(gb, avctx, &ptl->general_ptl);

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

  264. 

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

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

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

  268.     }

  269.     if (max_num_sub_layers - 1 > 0)

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

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

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

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

  274.             decode_profile_tier_level(gb, avctx, &ptl->sub_layer_ptl[i]);

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

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

  277.     }

  278. }

  279. 

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

  281.                                 int subpic_params_present)

  282. {

  283.     int i;

  284. 

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

  286.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  287.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  288. 

  289.         if (subpic_params_present) {

  290.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  291.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  292.         }

  293.         skip_bits1(gb); // cbr_flag

  294.     }

  295. }

  296. 

  297. static void decode_hrd(GetBitContext *gb, int common_inf_present,

  298.                        int max_sublayers)

  299. {

  300.     int nal_params_present = 0, vcl_params_present = 0;

  301.     int subpic_params_present = 0;

  302.     int i;

  303. 

  304.     if (common_inf_present) {

  305.         nal_params_present = get_bits1(gb);

  306.         vcl_params_present = get_bits1(gb);

  307. 

  308.         if (nal_params_present || vcl_params_present) {

  309.             subpic_params_present = get_bits1(gb);

  310. 

  311.             if (subpic_params_present) {

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

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

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

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

  316.             }

  317. 

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

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

  320. 

  321.             if (subpic_params_present)

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

  323. 

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

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

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

  327.         }

  328.     }

  329. 

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

  331.         int low_delay = 0;

  332.         unsigned int nb_cpb = 1;

  333.         int fixed_rate = get_bits1(gb);

  334. 

  335.         if (!fixed_rate)

  336.             fixed_rate = get_bits1(gb);

  337. 

  338.         if (fixed_rate)

  339.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  340.         else

  341.             low_delay = get_bits1(gb);

  342. 

  343.         if (!low_delay)

  344.             nb_cpb = get_ue_golomb_long(gb) + 1;

  345. 

  346.         if (nal_params_present)

  347.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  348.         if (vcl_params_present)

  349.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  350.     }

  351. }

  352. 

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

  354.                            HEVCParamSets *ps)

  355. {

  356.     int i,j;

  357.     int vps_id = 0;

  358.     HEVCVPS *vps;

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

  360. 

  361.     if (!vps_buf)

  362.         return AVERROR(ENOMEM);

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

  364. 

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

  366. 

  367.     vps_id = get_bits(gb, 4);

  368.     if (vps_id >= MAX_VPS_COUNT) {

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

  370.         goto err;

  371.     }

  372. 

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

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

  375.         goto err;

  376.     }

  377. 

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

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

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

  381. 

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

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

  384.         goto err;

  385.     }

  386. 

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

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

  389.                vps->vps_max_sub_layers);

  390.         goto err;

  391.     }

  392. 

  393.     parse_ptl(gb, avctx, &vps->ptl, vps->vps_max_sub_layers);

  394. 

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

  396. 

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

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

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

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

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

  402. 

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

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

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

  406.             goto err;

  407.         }

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

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

  410.                    vps->vps_num_reorder_pics[i]);

  411.             if (avctx->err_recognition & AV_EF_EXPLODE)

  412.                 goto err;

  413.         }

  414.     }

  415. 

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

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

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

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

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

  421. 

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

  423.     if (vps->vps_timing_info_present_flag) {

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

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

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

  427.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  431.             int common_inf_present = 1;

  432. 

  433.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  434.             if (i)

  435.                 common_inf_present = get_bits1(gb);

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

  437.         }

  438.     }

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

  440. 

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

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

  443.         av_buffer_unref(&vps_buf);

  444.     } else {

  445.         remove_vps(ps, vps_id);

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

  447.     }

  448. 

  449.     return 0;

  450. 

  451. err:

  452.     av_buffer_unref(&vps_buf);

  453.     return AVERROR_INVALIDDATA;

  454. }

  455. 

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

  457.                        int apply_defdispwin, HEVCSPS *sps)

  458. {

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

  460.     int sar_present;

  461. 

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

  463. 

  464.     sar_present = get_bits1(gb);

  465.     if (sar_present) {

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

  467.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  469.         else if (sar_idx == 255) {

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

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

  472.         } else

  473.             av_log(avctx, AV_LOG_WARNING,

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

  475.     }

  476. 

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

  478.     if (vui->overscan_info_present_flag)

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

  480. 

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

  482.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  487.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  488.         if (vui->colour_description_present_flag) {

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

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

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

  492. 

  493.             // Set invalid values to "unspecified"

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

  495.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  497.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  499.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

  500.         }

  501.     }

  502. 

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

  504.     if (vui->chroma_loc_info_present_flag) {

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

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

  507.     }

  508. 

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

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

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

  512. 

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

  514.     if (vui->default_display_window_flag) {

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

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

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

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

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

  520. 

  521.         if (apply_defdispwin &&

  522.             avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {

  523.             av_log(avctx, AV_LOG_DEBUG,

  524.                    "discarding vui default display window, "

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

  526.                    vui->def_disp_win.left_offset,

  527.                    vui->def_disp_win.right_offset,

  528.                    vui->def_disp_win.top_offset,

  529.                    vui->def_disp_win.bottom_offset);

  530. 

  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 = 0;

  535.         }

  536.     }

  537. 

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

  539.     if (vui->vui_timing_info_present_flag) {

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

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

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

  543.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  546.         if (vui->vui_hrd_parameters_present_flag)

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

  548.     }

  549. 

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

  551.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  560.     }

  561. }

  562. 

  563. static void set_default_scaling_list_data(ScalingList *sl)

  564. {

  565.     int matrixId;

  566. 

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

  568.         // 4x4 default is 16

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

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

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

  572.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  587. }

  588. 

  589. static int scaling_list_data(GetBitContext *gb, AVCodecContext *avctx, ScalingList *sl)

  590. {

  591.     uint8_t scaling_list_pred_mode_flag[4][6];

  592.     int32_t scaling_list_dc_coef[2][6];

  593.     int size_id, matrix_id, i, pos;

  594. 

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

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

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

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

  599.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  602.                 if (delta) {

  603.                     // Copy from previous array.

  604.                     if (matrix_id < delta) {

  605.                         av_log(avctx, AV_LOG_ERROR,

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

  607.                         return AVERROR_INVALIDDATA;

  608.                     }

  609. 

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

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

  612.                            size_id > 0 ? 64 : 16);

  613.                     if (size_id > 1)

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

  615.                 }

  616.             } else {

  617.                 int next_coef, coef_num;

  618.                 int32_t scaling_list_delta_coef;

  619. 

  620.                 next_coef = 8;

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

  622.                 if (size_id > 1) {

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

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

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

  626.                 }

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

  628.                     if (size_id == 0)

  629.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  630.                                   ff_hevc_diag_scan4x4_x[i];

  631.                     else

  632.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  633.                                   ff_hevc_diag_scan8x8_x[i];

  634. 

  635.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  638.                 }

  639.             }

  640.         }

  641. 

  642.     return 0;

  643. }

  644. 

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

  646. {

  647.     const AVPixFmtDescriptor *desc;

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

  649.         switch (sps->bit_depth) {

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

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

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

  653.         default:

  654.             av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n",

  655.                    sps->bit_depth);

  656.             return AVERROR_PATCHWELCOME;

  657.         }

  658.     } else {

  659.         av_log(avctx, AV_LOG_ERROR,

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

  661.         return AVERROR_PATCHWELCOME;

  662.     }

  663. 

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

  665.     if (!desc)

  666.         return AVERROR(EINVAL);

  667. 

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

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

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

  671. 

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

  673. 

  674.     return 0;

  675. }

  676. 

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

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

  679. {

  680.     int ret = 0;

  681.     int log2_diff_max_min_transform_block_size;

  682.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  683.     int i;

  684. 

  685.     // Coded parameters

  686. 

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

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

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

  690.         ret = AVERROR_INVALIDDATA;

  691.         goto err;

  692.     }

  693. 

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

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

  696.                sps->vps_id);

  697.         ret = AVERROR_INVALIDDATA;

  698.         goto err;

  699.     }

  700. 

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

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

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

  704.                sps->max_sub_layers);

  705.         ret = AVERROR_INVALIDDATA;

  706.         goto err;

  707.     }

  708. 

  709.     skip_bits1(gb); // temporal_id_nesting_flag

  710. 

  711.     parse_ptl(gb, avctx, &sps->ptl, sps->max_sub_layers);

  712. 

  713.     *sps_id = get_ue_golomb_long(gb);

  714.     if (*sps_id >= MAX_SPS_COUNT) {

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

  716.         ret = AVERROR_INVALIDDATA;

  717.         goto err;

  718.     }

  719. 

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

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

  722.         avpriv_report_missing_feature(avctx, "chroma_format_idc %d",

  723.                                       sps->chroma_format_idc);

  724.         ret = AVERROR_PATCHWELCOME;

  725.         goto err;

  726.     }

  727. 

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

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

  730. 

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

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

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

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

  735.         goto err;

  736. 

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

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

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

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

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

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

  743. 

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

  745.             av_log(avctx, AV_LOG_DEBUG,

  746.                    "discarding sps conformance window, "

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

  748.                    sps->pic_conf_win.left_offset,

  749.                    sps->pic_conf_win.right_offset,

  750.                    sps->pic_conf_win.top_offset,

  751.                    sps->pic_conf_win.bottom_offset);

  752. 

  753.             sps->pic_conf_win.left_offset   =

  754.             sps->pic_conf_win.right_offset  =

  755.             sps->pic_conf_win.top_offset    =

  756.             sps->pic_conf_win.bottom_offset = 0;

  757.         }

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

  759.     }

  760. 

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

  762.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  764.         av_log(avctx, AV_LOG_ERROR,

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

  766.                "this is unsupported.\n",

  767.                sps->bit_depth, bit_depth_chroma);

  768.         ret = AVERROR_INVALIDDATA;

  769.         goto err;

  770.     }

  771. 

  772. 

  773.     ret = map_pixel_format(avctx, sps);

  774.     if (ret < 0)

  775.         goto err;

  776. 

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

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

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

  780.                sps->log2_max_poc_lsb - 4);

  781.         ret = AVERROR_INVALIDDATA;

  782.         goto err;

  783.     }

  784. 

  785.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  794.             ret = AVERROR_INVALIDDATA;

  795.             goto err;

  796.         }

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

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

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

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

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

  802.                 ret = AVERROR_INVALIDDATA;

  803.                 goto err;

  804.             }

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

  806.         }

  807.     }

  808. 

  809.     if (!sublayer_ordering_info) {

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

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

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

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

  814.         }

  815.     }

  816. 

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

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

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

  820.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  821.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  822.                                                sps->log2_min_tb_size;

  823. 

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

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

  826.         ret = AVERROR_INVALIDDATA;

  827.         goto err;

  828.     }

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

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

  831. 

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

  833.     if (sps->scaling_list_enable_flag) {

  834.         set_default_scaling_list_data(&sps->scaling_list);

  835. 

  836.         if (get_bits1(gb)) {

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

  838.             if (ret < 0)

  839.                 goto err;

  840.         }

  841.     }

  842. 

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

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

  845. 

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

  847.     if (sps->pcm_enabled_flag) {

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

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

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

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

  852.                                         get_ue_golomb_long(gb);

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

  854.             av_log(avctx, AV_LOG_ERROR,

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

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

  857.             ret = AVERROR_INVALIDDATA;

  858.             goto err;

  859.         }

  860. 

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

  862.     }

  863. 

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

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

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

  867.                sps->nb_st_rps);

  868.         ret = AVERROR_INVALIDDATA;

  869.         goto err;

  870.     }

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

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

  873.                                                  sps, 0)) < 0)

  874.             goto err;

  875.     }

  876. 

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

  878.     if (sps->long_term_ref_pics_present_flag) {

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

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

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

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

  883.         }

  884.     }

  885. 

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

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

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

  889.     vui_present = get_bits1(gb);

  890.     if (vui_present)

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

  892.     skip_bits1(gb); // sps_extension_flag

  893. 

  894.     if (apply_defdispwin) {

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

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

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

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

  899.     }

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

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

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

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

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

  905.                sps->output_window.left_offset);

  906.     }

  907.     sps->output_width  = sps->width -

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

  909.     sps->output_height = sps->height -

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

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

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

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

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

  915.             ret = AVERROR_INVALIDDATA;

  916.             goto err;

  917.         }

  918.         av_log(avctx, AV_LOG_WARNING,

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

  920.         sps->output_window.left_offset   =

  921.         sps->output_window.right_offset  =

  922.         sps->output_window.top_offset    =

  923.         sps->output_window.bottom_offset = 0;

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

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

  926.     }

  927. 

  928.     // Inferred parameters

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

  930.                          sps->log2_diff_max_min_coding_block_size;

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

  932. 

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

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

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

  936. 

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

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

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

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

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

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

  943. 

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

  945. 

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

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

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

  949.         goto err;

  950.     }

  951. 

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

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

  954.         goto err;

  955.     }

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

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

  958.                sps->max_transform_hierarchy_depth_inter);

  959.         goto err;

  960.     }

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

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

  963.                sps->max_transform_hierarchy_depth_intra);

  964.         goto err;

  965.     }

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

  967.         av_log(avctx, AV_LOG_ERROR,

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

  969.                sps->log2_max_trafo_size);

  970.         goto err;

  971.     }

  972. 

  973.     return 0;

  974. 

  975. err:

  976.     return ret < 0 ? ret : AVERROR_INVALIDDATA;

  977. }

  978. 

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

  980.                            HEVCParamSets *ps, int apply_defdispwin)

  981. {

  982.     HEVCSPS *sps;

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

  984.     unsigned int sps_id;

  985.     int ret;

  986. 

  987.     if (!sps_buf)

  988.         return AVERROR(ENOMEM);

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

  990. 

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

  992. 

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

  994.                             apply_defdispwin,

  995.                             ps->vps_list, avctx);

  996.     if (ret < 0) {

  997.         av_buffer_unref(&sps_buf);

  998.         return ret;

  999.     }

  1000. 

  1001.     if (avctx->debug & FF_DEBUG_BITSTREAM) {

  1002.         av_log(avctx, AV_LOG_DEBUG,

  1003.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1004.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1005.                sps_id, sps->width, sps->height,

  1006.                sps->output_width, sps->output_height,

  1007.                av_get_pix_fmt_name(sps->pix_fmt));

  1008.     }

  1009. 

  1010.     /* check if this is a repeat of an already parsed SPS, then keep the

  1011.      * original one.

  1012.      * otherwise drop all PPSes that depend on it */

  1013.     if (ps->sps_list[sps_id] &&

  1014.         !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1015.         av_buffer_unref(&sps_buf);

  1016.     } else {

  1017.         remove_sps(ps, sps_id);

  1018.         ps->sps_list[sps_id] = sps_buf;

  1019.     }

  1020. 

  1021.     return 0;

  1022. }

  1023. 

  1024. static void hevc_pps_free(void *opaque, uint8_t *data)

  1025. {

  1026.     HEVCPPS *pps = (HEVCPPS*)data;

  1027. 

  1028.     av_freep(&pps->column_width);

  1029.     av_freep(&pps->row_height);

  1030.     av_freep(&pps->col_bd);

  1031.     av_freep(&pps->row_bd);

  1032.     av_freep(&pps->col_idxX);

  1033.     av_freep(&pps->ctb_addr_rs_to_ts);

  1034.     av_freep(&pps->ctb_addr_ts_to_rs);

  1035.     av_freep(&pps->tile_pos_rs);

  1036.     av_freep(&pps->tile_id);

  1037.     av_freep(&pps->min_tb_addr_zs);

  1038. 

  1039.     av_freep(&pps);

  1040. }

  1041. 

  1042. static inline int setup_pps(AVCodecContext *avctx, GetBitContext *gb,

  1043.                             HEVCPPS *pps, HEVCSPS *sps)

  1044. {

  1045.     int log2_diff;

  1046.     int pic_area_in_ctbs, pic_area_in_min_tbs;

  1047.     int i, j, x, y, ctb_addr_rs, tile_id;

  1048. 

  1049.     // Inferred parameters

  1050.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1051.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1052.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1053.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX)

  1054.         return AVERROR(ENOMEM);

  1055. 

  1056.     if (pps->uniform_spacing_flag) {

  1057.         if (!pps->column_width) {

  1058.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1059.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1060.         }

  1061.         if (!pps->column_width || !pps->row_height)

  1062.             return AVERROR(ENOMEM);

  1063. 

  1064.         for (i = 0; i < pps->num_tile_columns; i++) {

  1065.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1066.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1067.         }

  1068. 

  1069.         for (i = 0; i < pps->num_tile_rows; i++) {

  1070.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1071.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1072.         }

  1073.     }

  1074. 

  1075.     pps->col_bd[0] = 0;

  1076.     for (i = 0; i < pps->num_tile_columns; i++)

  1077.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1078. 

  1079.     pps->row_bd[0] = 0;

  1080.     for (i = 0; i < pps->num_tile_rows; i++)

  1081.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1082. 

  1083.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1084.         if (i > pps->col_bd[j])

  1085.             j++;

  1086.         pps->col_idxX[i] = j;

  1087.     }

  1088. 

  1089.     /**

  1090.      * 6.5

  1091.      */

  1092.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1093.     pic_area_in_min_tbs  = sps->min_tb_width * sps->min_tb_height;

  1094. 

  1095.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1096.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1097.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1098.     pps->min_tb_addr_zs    = av_malloc_array(pic_area_in_min_tbs, sizeof(*pps->min_tb_addr_zs));

  1099.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1100.         !pps->tile_id || !pps->min_tb_addr_zs) {

  1101.         return AVERROR(ENOMEM);

  1102.     }

  1103. 

  1104.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1105.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1106.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1107.         int tile_x = 0;

  1108.         int tile_y = 0;

  1109.         int val    = 0;

  1110. 

  1111.         for (i = 0; i < pps->num_tile_columns; i++) {

  1112.             if (tb_x < pps->col_bd[i + 1]) {

  1113.                 tile_x = i;

  1114.                 break;

  1115.             }

  1116.         }

  1117. 

  1118.         for (i = 0; i < pps->num_tile_rows; i++) {

  1119.             if (tb_y < pps->row_bd[i + 1]) {

  1120.                 tile_y = i;

  1121.                 break;

  1122.             }

  1123.         }

  1124. 

  1125.         for (i = 0; i < tile_x; i++)

  1126.             val += pps->row_height[tile_y] * pps->column_width[i];

  1127.         for (i = 0; i < tile_y; i++)

  1128.             val += sps->ctb_width * pps->row_height[i];

  1129. 

  1130.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1131.                tb_x - pps->col_bd[tile_x];

  1132. 

  1133.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1134.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1135.     }

  1136. 

  1137.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1138.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1139.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1140.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1141.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1142. 

  1143.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1144.     if (!pps->tile_pos_rs)

  1145.         return AVERROR(ENOMEM);

  1146. 

  1147.     for (j = 0; j < pps->num_tile_rows; j++)

  1148.         for (i = 0; i < pps->num_tile_columns; i++)

  1149.             pps->tile_pos_rs[j * pps->num_tile_columns + i] =

  1150.                 pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1151. 

  1152.     log2_diff = sps->log2_ctb_size - sps->log2_min_tb_size;

  1153.     for (y = 0; y < sps->min_tb_height; y++) {

  1154.         for (x = 0; x < sps->min_tb_width; x++) {

  1155.             int tb_x = x >> log2_diff;

  1156.             int tb_y = y >> log2_diff;

  1157.             int rs   = sps->ctb_width * tb_y + tb_x;

  1158.             int val  = pps->ctb_addr_rs_to_ts[rs] << (log2_diff * 2);

  1159.             for (i = 0; i < log2_diff; i++) {

  1160.                 int m = 1 << i;

  1161.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1162.             }

  1163.             pps->min_tb_addr_zs[y * sps->min_tb_width + x] = val;

  1164.         }

  1165.     }

  1166. 

  1167.     return 0;

  1168. }

  1169. 

  1170. int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,

  1171.                            HEVCParamSets *ps)

  1172. {

  1173.     HEVCSPS      *sps = NULL;

  1174.     int i, ret = 0;

  1175.     unsigned int pps_id = 0;

  1176. 

  1177.     AVBufferRef *pps_buf;

  1178.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1179. 

  1180.     if (!pps)

  1181.         return AVERROR(ENOMEM);

  1182. 

  1183.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1184.                                hevc_pps_free, NULL, 0);

  1185.     if (!pps_buf) {

  1186.         av_freep(&pps);

  1187.         return AVERROR(ENOMEM);

  1188.     }

  1189. 

  1190.     av_log(avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1191. 

  1192.     // Default values

  1193.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1194.     pps->num_tile_columns                      = 1;

  1195.     pps->num_tile_rows                         = 1;

  1196.     pps->uniform_spacing_flag                  = 1;

  1197.     pps->disable_dbf                           = 0;

  1198.     pps->beta_offset                           = 0;

  1199.     pps->tc_offset                             = 0;

  1200. 

  1201.     // Coded parameters

  1202.     pps_id = get_ue_golomb_long(gb);

  1203.     if (pps_id >= MAX_PPS_COUNT) {

  1204.         av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1205.         ret = AVERROR_INVALIDDATA;

  1206.         goto err;

  1207.     }

  1208.     pps->sps_id = get_ue_golomb_long(gb);

  1209.     if (pps->sps_id >= MAX_SPS_COUNT) {

  1210.         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1211.         ret = AVERROR_INVALIDDATA;

  1212.         goto err;

  1213.     }

  1214.     if (!ps->sps_list[pps->sps_id]) {

  1215.         av_log(avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1216.         ret = AVERROR_INVALIDDATA;

  1217.         goto err;

  1218.     }

  1219.     sps = (HEVCSPS *)ps->sps_list[pps->sps_id]->data;

  1220. 

  1221.     pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

  1222.     pps->output_flag_present_flag              = get_bits1(gb);

  1223.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1224. 

  1225.     pps->sign_data_hiding_flag = get_bits1(gb);

  1226. 

  1227.     pps->cabac_init_present_flag = get_bits1(gb);

  1228. 

  1229.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1230.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1231. 

  1232.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1233. 

  1234.     pps->constrained_intra_pred_flag = get_bits1(gb);

  1235.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1236. 

  1237.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1238.     pps->diff_cu_qp_delta_depth   = 0;

  1239.     if (pps->cu_qp_delta_enabled_flag)

  1240.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1241. 

  1242.     pps->cb_qp_offset = get_se_golomb(gb);

  1243.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1244.         av_log(avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1245.                pps->cb_qp_offset);

  1246.         ret = AVERROR_INVALIDDATA;

  1247.         goto err;

  1248.     }

  1249.     pps->cr_qp_offset = get_se_golomb(gb);

  1250.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1251.         av_log(avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1252.                pps->cr_qp_offset);

  1253.         ret = AVERROR_INVALIDDATA;

  1254.         goto err;

  1255.     }

  1256.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1257. 

  1258.     pps->weighted_pred_flag   = get_bits1(gb);

  1259.     pps->weighted_bipred_flag = get_bits1(gb);

  1260. 

  1261.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1262.     pps->tiles_enabled_flag               = get_bits1(gb);

  1263.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1264. 

  1265.     if (pps->tiles_enabled_flag) {

  1266.         pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

  1267.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

  1268.         if (pps->num_tile_columns == 0 ||

  1269.             pps->num_tile_columns >= sps->width) {

  1270.             av_log(avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1271.                    pps->num_tile_columns - 1);

  1272.             ret = AVERROR_INVALIDDATA;

  1273.             goto err;

  1274.         }

  1275.         if (pps->num_tile_rows == 0 ||

  1276.             pps->num_tile_rows >= sps->height) {

  1277.             av_log(avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1278.                    pps->num_tile_rows - 1);

  1279.             ret = AVERROR_INVALIDDATA;

  1280.             goto err;

  1281.         }

  1282. 

  1283.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1284.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1285.         if (!pps->column_width || !pps->row_height) {

  1286.             ret = AVERROR(ENOMEM);

  1287.             goto err;

  1288.         }

  1289. 

  1290.         pps->uniform_spacing_flag = get_bits1(gb);

  1291.         if (!pps->uniform_spacing_flag) {

  1292.             uint64_t sum = 0;

  1293.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1294.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1295.                 sum                 += pps->column_width[i];

  1296.             }

  1297.             if (sum >= sps->ctb_width) {

  1298.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1299.                 ret = AVERROR_INVALIDDATA;

  1300.                 goto err;

  1301.             }

  1302.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1303. 

  1304.             sum = 0;

  1305.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1306.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1307.                 sum               += pps->row_height[i];

  1308.             }

  1309.             if (sum >= sps->ctb_height) {

  1310.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1311.                 ret = AVERROR_INVALIDDATA;

  1312.                 goto err;

  1313.             }

  1314.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1315.         }

  1316.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1317.     }

  1318. 

  1319.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1320. 

  1321.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1322.     if (pps->deblocking_filter_control_present_flag) {

  1323.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1324.         pps->disable_dbf                             = get_bits1(gb);

  1325.         if (!pps->disable_dbf) {

  1326.             pps->beta_offset = get_se_golomb(gb) * 2;

  1327.             pps->tc_offset = get_se_golomb(gb) * 2;

  1328.             if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

  1329.                 av_log(avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1330.                        pps->beta_offset/2);

  1331.                 ret = AVERROR_INVALIDDATA;

  1332.                 goto err;

  1333.             }

  1334.             if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

  1335.                 av_log(avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1336.                        pps->tc_offset/2);

  1337.                 ret = AVERROR_INVALIDDATA;

  1338.                 goto err;

  1339.             }

  1340.         }

  1341.     }

  1342. 

  1343.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1344.     if (pps->scaling_list_data_present_flag) {

  1345.         set_default_scaling_list_data(&pps->scaling_list);

  1346.         ret = scaling_list_data(gb, avctx, &pps->scaling_list);

  1347.         if (ret < 0)

  1348.             goto err;

  1349.     }

  1350.     pps->lists_modification_present_flag = get_bits1(gb);

  1351.     pps->log2_parallel_merge_level       = get_ue_golomb_long(gb) + 2;

  1352.     if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {

  1353.         av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1354.                pps->log2_parallel_merge_level - 2);

  1355.         ret = AVERROR_INVALIDDATA;

  1356.         goto err;

  1357.     }

  1358. 

  1359.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1360.     skip_bits1(gb);     // pps_extension_flag

  1361. 

  1362.     ret = setup_pps(avctx, gb, pps, sps);

  1363.     if (ret < 0)

  1364.         goto err;

  1365. 

  1366.     remove_pps(ps, pps_id);

  1367.     ps->pps_list[pps_id] = pps_buf;

  1368. 

  1369.     return 0;

  1370. 

  1371. err:

  1372.     av_buffer_unref(&pps_buf);

  1373.     return ret;

  1374. }