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FFmpeg/libavcodec/hevc_ps.c

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  1. /*

  2.  * HEVC Parameter Set decoding

  3.  *

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

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

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

  7.  * Copyright (C) 2013 Vittorio Giovara

  8.  *

  9.  * This file is part of FFmpeg.

  10.  *

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

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

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

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

  15.  *

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

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

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

  19.  * Lesser General Public License for more details.

  20.  *

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

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

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

  24.  */

  25. 

  26. #include "libavutil/imgutils.h"

  27. #include "golomb.h"

  28. #include "hevc_data.h"

  29. #include "hevc_ps.h"

  30. 

  31. static const uint8_t default_scaling_list_intra[] = {

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

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

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

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

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

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

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

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

  40. };

  41. 

  42. static const uint8_t default_scaling_list_inter[] = {

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

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

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

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

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

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

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

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

  51. };

  52. 

  53. static const AVRational vui_sar[] = {

  54.     {  0,   1 },

  55.     {  1,   1 },

  56.     { 12,  11 },

  57.     { 10,  11 },

  58.     { 16,  11 },

  59.     { 40,  33 },

  60.     { 24,  11 },

  61.     { 20,  11 },

  62.     { 32,  11 },

  63.     { 80,  33 },

  64.     { 18,  11 },

  65.     { 15,  11 },

  66.     { 64,  33 },

  67.     { 160, 99 },

  68.     {  4,   3 },

  69.     {  3,   2 },

  70.     {  2,   1 },

  71. };

  72. 

  73. static const uint8_t hevc_sub_width_c[] = {

  74.     1, 2, 2, 1

  75. };

  76. 

  77. static const uint8_t hevc_sub_height_c[] = {

  78.     1, 2, 1, 1

  79. };

  80. 

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

  82. {

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

  84.         s->pps = NULL;

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

  86. }

  87. 

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

  89. {

  90.     int i;

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

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

  93.             s->sps = NULL;

  94. 

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

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

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

  98.                 remove_pps(s, i);

  99. 

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

  101.     }

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

  103. }

  104. 

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

  106. {

  107.     int i;

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

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

  110.             s->vps = NULL;

  111. 

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

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

  114.                 remove_sps(s, i);

  115.     }

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

  117. }

  118. 

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

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

  121. {

  122.     uint8_t rps_predict = 0;

  123.     int delta_poc;

  124.     int k0 = 0;

  125.     int k1 = 0;

  126.     int k  = 0;

  127.     int i;

  128. 

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

  130.         rps_predict = get_bits1(gb);

  131. 

  132.     if (rps_predict) {

  133.         const ShortTermRPS *rps_ridx;

  134.         int delta_rps;

  135.         unsigned abs_delta_rps;

  136.         uint8_t use_delta_flag = 0;

  137.         uint8_t delta_rps_sign;

  138. 

  139.         if (is_slice_header) {

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

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

  142.                 av_log(avctx, AV_LOG_ERROR,

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

  144.                        delta_idx, sps->nb_st_rps);

  145.                 return AVERROR_INVALIDDATA;

  146.             }

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

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

  149.         } else

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

  151. 

  152.         delta_rps_sign = get_bits1(gb);

  153.         abs_delta_rps  = get_ue_golomb_long(gb) + 1;

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

  155.             av_log(avctx, AV_LOG_ERROR,

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

  157.                    abs_delta_rps);

  158.             return AVERROR_INVALIDDATA;

  159.         }

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

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

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

  163. 

  164.             if (!used)

  165.                 use_delta_flag = get_bits1(gb);

  166. 

  167.             if (used || use_delta_flag) {

  168.                 if (i < rps_ridx->num_delta_pocs)

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

  170.                 else

  171.                     delta_poc = delta_rps;

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

  173.                 if (delta_poc < 0)

  174.                     k0++;

  175.                 else

  176.                     k1++;

  177.                 k++;

  178.             }

  179.         }

  180. 

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

  182.             av_log(avctx, AV_LOG_ERROR,

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

  184.             return AVERROR_INVALIDDATA;

  185.         }

  186. 

  187.         rps->num_delta_pocs    = k;

  188.         rps->num_negative_pics = k0;

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

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

  191.             int used, tmp;

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

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

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

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

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

  197.                     if (delta_poc < tmp) {

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

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

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

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

  202.                     }

  203.                 }

  204.             }

  205.         }

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

  207.             int used;

  208.             k = rps->num_negative_pics - 1;

  209.             // flip the negative values to largest first

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

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

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

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

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

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

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

  217.                 k--;

  218.             }

  219.         }

  220.     } else {

  221.         unsigned int prev, nb_positive_pics;

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

  223.         nb_positive_pics       = get_ue_golomb_long(gb);

  224. 

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

  226.             nb_positive_pics >= HEVC_MAX_REFS) {

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

  228.             return AVERROR_INVALIDDATA;

  229.         }

  230. 

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

  232.         if (rps->num_delta_pocs) {

  233.             prev = 0;

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

  235.                 delta_poc = get_ue_golomb_long(gb) + 1;

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

  237.                     av_log(avctx, AV_LOG_ERROR,

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

  239.                         delta_poc);

  240.                     return AVERROR_INVALIDDATA;

  241.                 }

  242.                 prev -= delta_poc;

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

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

  245.             }

  246.             prev = 0;

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

  248.                 delta_poc = get_ue_golomb_long(gb) + 1;

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

  250.                     av_log(avctx, AV_LOG_ERROR,

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

  252.                         delta_poc);

  253.                     return AVERROR_INVALIDDATA;

  254.                 }

  255.                 prev += delta_poc;

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

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

  258.             }

  259.         }

  260.     }

  261.     return 0;

  262. }

  263. 

  264. 

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

  266.                                       PTLCommon *ptl)

  267. {

  268.     int i;

  269. 

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

  271.         return -1;

  272. 

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

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

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

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

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

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

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

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

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

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

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

  284.     else

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

  286. 

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

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

  289. 

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

  291.             ptl->profile_idc = i;

  292.     }

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

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

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

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

  297. 

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

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

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

  301. 

  302.     return 0;

  303. }

  304. 

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

  306.                       PTL *ptl, int max_num_sub_layers)

  307. {

  308.     int i;

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

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

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

  312.         return -1;

  313.     }

  314. 

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

  316. 

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

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

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

  320.     }

  321. 

  322.     if (max_num_sub_layers - 1> 0)

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

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

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

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

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

  328.             av_log(avctx, AV_LOG_ERROR,

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

  330.             return -1;

  331.         }

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

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

  334.                 av_log(avctx, AV_LOG_ERROR,

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

  336.                 return -1;

  337.             } else

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

  339.         }

  340.     }

  341. 

  342.     return 0;

  343. }

  344. 

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

  346.                                 int subpic_params_present)

  347. {

  348.     int i;

  349. 

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

  351.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  352.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  353. 

  354.         if (subpic_params_present) {

  355.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  356.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  357.         }

  358.         skip_bits1(gb); // cbr_flag

  359.     }

  360. }

  361. 

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

  363.                        int max_sublayers)

  364. {

  365.     int nal_params_present = 0, vcl_params_present = 0;

  366.     int subpic_params_present = 0;

  367.     int i;

  368. 

  369.     if (common_inf_present) {

  370.         nal_params_present = get_bits1(gb);

  371.         vcl_params_present = get_bits1(gb);

  372. 

  373.         if (nal_params_present || vcl_params_present) {

  374.             subpic_params_present = get_bits1(gb);

  375. 

  376.             if (subpic_params_present) {

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

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

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

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

  381.             }

  382. 

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

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

  385. 

  386.             if (subpic_params_present)

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

  388. 

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

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

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

  392.         }

  393.     }

  394. 

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

  396.         int low_delay = 0;

  397.         unsigned int nb_cpb = 1;

  398.         int fixed_rate = get_bits1(gb);

  399. 

  400.         if (!fixed_rate)

  401.             fixed_rate = get_bits1(gb);

  402. 

  403.         if (fixed_rate)

  404.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  405.         else

  406.             low_delay = get_bits1(gb);

  407. 

  408.         if (!low_delay) {

  409.             nb_cpb = get_ue_golomb_long(gb) + 1;

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

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

  412.                 return AVERROR_INVALIDDATA;

  413.             }

  414.         }

  415. 

  416.         if (nal_params_present)

  417.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  418.         if (vcl_params_present)

  419.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  420.     }

  421.     return 0;

  422. }

  423. 

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

  425.                            HEVCParamSets *ps)

  426. {

  427.     int i,j;

  428.     int vps_id = 0;

  429.     ptrdiff_t nal_size;

  430.     HEVCVPS *vps;

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

  432. 

  433.     if (!vps_buf)

  434.         return AVERROR(ENOMEM);

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

  436. 

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

  438. 

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

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

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

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

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

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

  445.     } else {

  446.         vps->data_size = nal_size;

  447.     }

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

  449. 

  450.     vps_id = get_bits(gb, 4);

  451. 

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

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

  454.         goto err;

  455.     }

  456. 

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

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

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

  460. 

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

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

  463.         goto err;

  464.     }

  465. 

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

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

  468.                vps->vps_max_sub_layers);

  469.         goto err;

  470.     }

  471. 

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

  473.         goto err;

  474. 

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

  476. 

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

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

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

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

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

  482. 

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

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

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

  486.             goto err;

  487.         }

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

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

  490.                    vps->vps_num_reorder_pics[i]);

  491.             if (avctx->err_recognition & AV_EF_EXPLODE)

  492.                 goto err;

  493.         }

  494.     }

  495. 

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

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

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

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

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

  501.         goto err;

  502.     }

  503. 

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

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

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

  507. 

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

  509.     if (vps->vps_timing_info_present_flag) {

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

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

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

  513.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  517.             av_log(avctx, AV_LOG_ERROR,

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

  519.             goto err;

  520.         }

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

  522.             int common_inf_present = 1;

  523. 

  524.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  525.             if (i)

  526.                 common_inf_present = get_bits1(gb);

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

  528.         }

  529.     }

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

  531. 

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

  533.         av_log(avctx, AV_LOG_ERROR,

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

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

  536.             goto err;

  537.     }

  538. 

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

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

  541.         av_buffer_unref(&vps_buf);

  542.     } else {

  543.         remove_vps(ps, vps_id);

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

  545.     }

  546. 

  547.     return 0;

  548. 

  549. err:

  550.     av_buffer_unref(&vps_buf);

  551.     return AVERROR_INVALIDDATA;

  552. }

  553. 

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

  555.                        int apply_defdispwin, HEVCSPS *sps)

  556. {

  557.     VUI backup_vui, *vui = &sps->vui;

  558.     GetBitContext backup;

  559.     int sar_present, alt = 0;

  560. 

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

  562. 

  563.     sar_present = get_bits1(gb);

  564.     if (sar_present) {

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

  566.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  568.         else if (sar_idx == 255) {

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

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

  571.         } else

  572.             av_log(avctx, AV_LOG_WARNING,

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

  574.     }

  575. 

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

  577.     if (vui->overscan_info_present_flag)

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

  579. 

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

  581.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  586.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  587.         if (vui->colour_description_present_flag) {

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

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

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

  591. 

  592.             // Set invalid values to "unspecified"

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

  594.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  596.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  598.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

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

  600.                 switch (sps->pix_fmt) {

  601.                 case AV_PIX_FMT_YUV444P:

  602.                     sps->pix_fmt = AV_PIX_FMT_GBRP;

  603.                     break;

  604.                 case AV_PIX_FMT_YUV444P10:

  605.                     sps->pix_fmt = AV_PIX_FMT_GBRP10;

  606.                     break;

  607.                 case AV_PIX_FMT_YUV444P12:

  608.                     sps->pix_fmt = AV_PIX_FMT_GBRP12;

  609.                     break;

  610.                 }

  611.             }

  612.         }

  613.     }

  614. 

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

  616.     if (vui->chroma_loc_info_present_flag) {

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

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

  619.     }

  620. 

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

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

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

  624. 

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

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

  627.     memcpy(&backup_vui, vui, sizeof(backup_vui));

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

  629.         vui->default_display_window_flag = 0;

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

  631.     } else

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

  633. 

  634.     if (vui->default_display_window_flag) {

  635.         int vert_mult  = hevc_sub_height_c[sps->chroma_format_idc];

  636.         int horiz_mult = hevc_sub_width_c[sps->chroma_format_idc];

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

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

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

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

  641. 

  642.         if (apply_defdispwin &&

  643.             avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {

  644.             av_log(avctx, AV_LOG_DEBUG,

  645.                    "discarding vui default display window, "

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

  647.                    vui->def_disp_win.left_offset,

  648.                    vui->def_disp_win.right_offset,

  649.                    vui->def_disp_win.top_offset,

  650.                    vui->def_disp_win.bottom_offset);

  651. 

  652.             vui->def_disp_win.left_offset   =

  653.             vui->def_disp_win.right_offset  =

  654.             vui->def_disp_win.top_offset    =

  655.             vui->def_disp_win.bottom_offset = 0;

  656.         }

  657.     }

  658. 

  659. timing_info:

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

  661. 

  662.     if (vui->vui_timing_info_present_flag) {

  663.         if( get_bits_left(gb) < 66 && !alt) {

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

  665.             // at where def_disp_win is normally located

  666.             av_log(avctx, AV_LOG_WARNING,

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

  668.             memcpy(vui, &backup_vui, sizeof(backup_vui));

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

  670.             alt = 1;

  671.             goto timing_info;

  672.         }

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

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

  675.         if (alt) {

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

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

  678.         }

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

  680.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  683.         if (vui->vui_hrd_parameters_present_flag)

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

  685.     }

  686. 

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

  688.     if (vui->bitstream_restriction_flag) {

  689.         if (get_bits_left(gb) < 8 && !alt) {

  690.             av_log(avctx, AV_LOG_WARNING,

  691.                    "Strange VUI bitstream restriction information, retrying"

  692.                    " from timing information...\n");

  693.             memcpy(vui, &backup_vui, sizeof(backup_vui));

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

  695.             alt = 1;

  696.             goto timing_info;

  697.         }

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

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

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

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

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

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

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

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

  706.     }

  707. 

  708.     if (get_bits_left(gb) < 1 && !alt) {

  709.         // XXX: Alternate syntax when sps_range_extension_flag != 0?

  710.         av_log(avctx, AV_LOG_WARNING,

  711.                "Overread in VUI, retrying from timing information...\n");

  712.         memcpy(vui, &backup_vui, sizeof(backup_vui));

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

  714.         alt = 1;

  715.         goto timing_info;

  716.     }

  717. }

  718. 

  719. static void set_default_scaling_list_data(ScalingList *sl)

  720. {

  721.     int matrixId;

  722. 

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

  724.         // 4x4 default is 16

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

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

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

  728.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  747. }

  748. 

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

  750. {

  751.     uint8_t scaling_list_pred_mode_flag;

  752.     int32_t scaling_list_dc_coef[2][6];

  753.     int size_id, matrix_id, pos;

  754.     int i;

  755. 

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

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

  758.             scaling_list_pred_mode_flag = get_bits1(gb);

  759.             if (!scaling_list_pred_mode_flag) {

  760.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  763.                 if (delta) {

  764.                     // Copy from previous array.

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

  766.                     if (matrix_id < delta) {

  767.                         av_log(avctx, AV_LOG_ERROR,

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

  769.                         return AVERROR_INVALIDDATA;

  770.                     }

  771. 

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

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

  774.                            size_id > 0 ? 64 : 16);

  775.                     if (size_id > 1)

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

  777.                 }

  778.             } else {

  779.                 int next_coef, coef_num;

  780.                 int32_t scaling_list_delta_coef;

  781. 

  782.                 next_coef = 8;

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

  784.                 if (size_id > 1) {

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

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

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

  788.                 }

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

  790.                     if (size_id == 0)

  791.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  792.                                   ff_hevc_diag_scan4x4_x[i];

  793.                     else

  794.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  795.                                   ff_hevc_diag_scan8x8_x[i];

  796. 

  797.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  800.                 }

  801.             }

  802.         }

  803. 

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

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

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

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

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

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

  810.         }

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

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

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

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

  815.     }

  816. 

  817. 

  818.     return 0;

  819. }

  820. 

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

  822. {

  823.     const AVPixFmtDescriptor *desc;

  824.     switch (sps->bit_depth) {

  825.     case 8:

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

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

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

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

  830.        break;

  831.     case 9:

  832.         if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY9;

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

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

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

  836.         break;

  837.     case 10:

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

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

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

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

  842.         break;

  843.     case 12:

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

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

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

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

  848.         break;

  849.     default:

  850.         av_log(avctx, AV_LOG_ERROR,

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

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

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

  854.         return AVERROR_INVALIDDATA;

  855.     }

  856. 

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

  858.     if (!desc)

  859.         return AVERROR(EINVAL);

  860. 

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

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

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

  864. 

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

  866. 

  867.     return 0;

  868. }

  869. 

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

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

  872. {

  873.     HEVCWindow *ow;

  874.     int ret = 0;

  875.     int log2_diff_max_min_transform_block_size;

  876.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  877.     int i;

  878. 

  879.     // Coded parameters

  880. 

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

  882. 

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

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

  885.                sps->vps_id);

  886.         return AVERROR_INVALIDDATA;

  887.     }

  888. 

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

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

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

  892.                sps->max_sub_layers);

  893.         return AVERROR_INVALIDDATA;

  894.     }

  895. 

  896.     sps->temporal_id_nesting_flag = get_bits(gb, 1);

  897. 

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

  899.         return ret;

  900. 

  901.     *sps_id = get_ue_golomb_long(gb);

  902.     if (*sps_id >= HEVC_MAX_SPS_COUNT) {

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

  904.         return AVERROR_INVALIDDATA;

  905.     }

  906. 

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

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

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

  910.         return AVERROR_INVALIDDATA;

  911.     }

  912. 

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

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

  915. 

  916.     if (sps->separate_colour_plane_flag)

  917.         sps->chroma_format_idc = 0;

  918. 

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

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

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

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

  923.         return ret;

  924. 

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

  926.         int vert_mult  = hevc_sub_height_c[sps->chroma_format_idc];

  927.         int horiz_mult = hevc_sub_width_c[sps->chroma_format_idc];

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

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

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

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

  932. 

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

  934.             av_log(avctx, AV_LOG_DEBUG,

  935.                    "discarding sps conformance window, "

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

  937.                    sps->pic_conf_win.left_offset,

  938.                    sps->pic_conf_win.right_offset,

  939.                    sps->pic_conf_win.top_offset,

  940.                    sps->pic_conf_win.bottom_offset);

  941. 

  942.             sps->pic_conf_win.left_offset   =

  943.             sps->pic_conf_win.right_offset  =

  944.             sps->pic_conf_win.top_offset    =

  945.             sps->pic_conf_win.bottom_offset = 0;

  946.         }

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

  948.     }

  949. 

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

  951.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  953.         av_log(avctx, AV_LOG_ERROR,

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

  955.                "this is unsupported.\n",

  956.                sps->bit_depth, bit_depth_chroma);

  957.         return AVERROR_INVALIDDATA;

  958.     }

  959.     sps->bit_depth_chroma = bit_depth_chroma;

  960. 

  961.     ret = map_pixel_format(avctx, sps);

  962.     if (ret < 0)

  963.         return ret;

  964. 

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

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

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

  968.                sps->log2_max_poc_lsb - 4);

  969.         return AVERROR_INVALIDDATA;

  970.     }

  971. 

  972.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  981.             return AVERROR_INVALIDDATA;

  982.         }

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

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

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

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

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

  988.                 return AVERROR_INVALIDDATA;

  989.             }

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

  991.         }

  992.     }

  993. 

  994.     if (!sublayer_ordering_info) {

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

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

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

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

  999.         }

  1000.     }

  1001. 

  1002.     sps->log2_min_cb_size                    = get_ue_golomb_long(gb) + 3;

  1003.     sps->log2_diff_max_min_coding_block_size = get_ue_golomb_long(gb);

  1004.     sps->log2_min_tb_size                    = get_ue_golomb_long(gb) + 2;

  1005.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  1006.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  1007.                                                sps->log2_min_tb_size;

  1008. 

  1009.     if (sps->log2_min_cb_size < 3 || sps->log2_min_cb_size > 30) {

  1010.         av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_min_cb_size", sps->log2_min_cb_size);

  1011.         return AVERROR_INVALIDDATA;

  1012.     }

  1013. 

  1014.     if (sps->log2_diff_max_min_coding_block_size > 30) {

  1015.         av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_coding_block_size", sps->log2_diff_max_min_coding_block_size);

  1016.         return AVERROR_INVALIDDATA;

  1017.     }

  1018. 

  1019.     if (sps->log2_min_tb_size >= sps->log2_min_cb_size || sps->log2_min_tb_size < 2) {

  1020.         av_log(avctx, AV_LOG_ERROR, "Invalid value for log2_min_tb_size");

  1021.         return AVERROR_INVALIDDATA;

  1022.     }

  1023. 

  1024.     if (log2_diff_max_min_transform_block_size < 0 || log2_diff_max_min_transform_block_size > 30) {

  1025.         av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_transform_block_size", log2_diff_max_min_transform_block_size);

  1026.         return AVERROR_INVALIDDATA;

  1027.     }

  1028. 

  1029.     sps->max_transform_hierarchy_depth_inter = get_ue_golomb_long(gb);

  1030.     sps->max_transform_hierarchy_depth_intra = get_ue_golomb_long(gb);

  1031. 

  1032.     sps->scaling_list_enable_flag = get_bits1(gb);

  1033.     if (sps->scaling_list_enable_flag) {

  1034.         set_default_scaling_list_data(&sps->scaling_list);

  1035. 

  1036.         if (get_bits1(gb)) {

  1037.             ret = scaling_list_data(gb, avctx, &sps->scaling_list, sps);

  1038.             if (ret < 0)

  1039.                 return ret;

  1040.         }

  1041.     }

  1042. 

  1043.     sps->amp_enabled_flag = get_bits1(gb);

  1044.     sps->sao_enabled      = get_bits1(gb);

  1045. 

  1046.     sps->pcm_enabled_flag = get_bits1(gb);

  1047.     if (sps->pcm_enabled_flag) {

  1048.         sps->pcm.bit_depth   = get_bits(gb, 4) + 1;

  1049.         sps->pcm.bit_depth_chroma = get_bits(gb, 4) + 1;

  1050.         sps->pcm.log2_min_pcm_cb_size = get_ue_golomb_long(gb) + 3;

  1051.         sps->pcm.log2_max_pcm_cb_size = sps->pcm.log2_min_pcm_cb_size +

  1052.                                         get_ue_golomb_long(gb);

  1053.         if (FFMAX(sps->pcm.bit_depth, sps->pcm.bit_depth_chroma) > sps->bit_depth) {

  1054.             av_log(avctx, AV_LOG_ERROR,

  1055.                    "PCM bit depth (%d, %d) is greater than normal bit depth (%d)\n",

  1056.                    sps->pcm.bit_depth, sps->pcm.bit_depth_chroma, sps->bit_depth);

  1057.             return AVERROR_INVALIDDATA;

  1058.         }

  1059. 

  1060.         sps->pcm.loop_filter_disable_flag = get_bits1(gb);

  1061.     }

  1062. 

  1063.     sps->nb_st_rps = get_ue_golomb_long(gb);

  1064.     if (sps->nb_st_rps > HEVC_MAX_SHORT_TERM_REF_PIC_SETS) {

  1065.         av_log(avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",

  1066.                sps->nb_st_rps);

  1067.         return AVERROR_INVALIDDATA;

  1068.     }

  1069.     for (i = 0; i < sps->nb_st_rps; i++) {

  1070.         if ((ret = ff_hevc_decode_short_term_rps(gb, avctx, &sps->st_rps[i],

  1071.                                                  sps, 0)) < 0)

  1072.             return ret;

  1073.     }

  1074. 

  1075.     sps->long_term_ref_pics_present_flag = get_bits1(gb);

  1076.     if (sps->long_term_ref_pics_present_flag) {

  1077.         sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);

  1078.         if (sps->num_long_term_ref_pics_sps > HEVC_MAX_LONG_TERM_REF_PICS) {

  1079.             av_log(avctx, AV_LOG_ERROR, "Too many long term ref pics: %d.\n",

  1080.                    sps->num_long_term_ref_pics_sps);

  1081.             return AVERROR_INVALIDDATA;

  1082.         }

  1083.         for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {

  1084.             sps->lt_ref_pic_poc_lsb_sps[i]       = get_bits(gb, sps->log2_max_poc_lsb);

  1085.             sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);

  1086.         }

  1087.     }

  1088. 

  1089.     sps->sps_temporal_mvp_enabled_flag          = get_bits1(gb);

  1090.     sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);

  1091.     sps->vui.sar = (AVRational){0, 1};

  1092.     vui_present = get_bits1(gb);

  1093.     if (vui_present)

  1094.         decode_vui(gb, avctx, apply_defdispwin, sps);

  1095. 

  1096.     if (get_bits1(gb)) { // sps_extension_flag

  1097.         sps->sps_range_extension_flag = get_bits1(gb);

  1098.         skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);

  1099.         if (sps->sps_range_extension_flag) {

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

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

  1102.             sps->implicit_rdpcm_enabled_flag = get_bits1(gb);

  1103. 

  1104.             sps->explicit_rdpcm_enabled_flag = get_bits1(gb);

  1105. 

  1106.             sps->extended_precision_processing_flag = get_bits1(gb);

  1107.             if (sps->extended_precision_processing_flag)

  1108.                 av_log(avctx, AV_LOG_WARNING,

  1109.                    "extended_precision_processing_flag not yet implemented\n");

  1110. 

  1111.             sps->intra_smoothing_disabled_flag       = get_bits1(gb);

  1112.             sps->high_precision_offsets_enabled_flag = get_bits1(gb);

  1113.             if (sps->high_precision_offsets_enabled_flag)

  1114.                 av_log(avctx, AV_LOG_WARNING,

  1115.                    "high_precision_offsets_enabled_flag not yet implemented\n");

  1116. 

  1117.             sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);

  1118. 

  1119.             sps->cabac_bypass_alignment_enabled_flag  = get_bits1(gb);

  1120.             if (sps->cabac_bypass_alignment_enabled_flag)

  1121.                 av_log(avctx, AV_LOG_WARNING,

  1122.                    "cabac_bypass_alignment_enabled_flag not yet implemented\n");

  1123.         }

  1124.     }

  1125.     if (apply_defdispwin) {

  1126.         sps->output_window.left_offset   += sps->vui.def_disp_win.left_offset;

  1127.         sps->output_window.right_offset  += sps->vui.def_disp_win.right_offset;

  1128.         sps->output_window.top_offset    += sps->vui.def_disp_win.top_offset;

  1129.         sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

  1130.     }

  1131. 

  1132.     ow = &sps->output_window;

  1133.     if (ow->left_offset >= INT_MAX - ow->right_offset     ||

  1134.         ow->top_offset  >= INT_MAX - ow->bottom_offset    ||

  1135.         ow->left_offset + ow->right_offset  >= sps->width ||

  1136.         ow->top_offset  + ow->bottom_offset >= sps->height) {

  1137.         av_log(avctx, AV_LOG_WARNING, "Invalid cropping offsets: %u/%u/%u/%u\n",

  1138.                ow->left_offset, ow->right_offset, ow->top_offset, ow->bottom_offset);

  1139.         if (avctx->err_recognition & AV_EF_EXPLODE) {

  1140.             return AVERROR_INVALIDDATA;

  1141.         }

  1142.         av_log(avctx, AV_LOG_WARNING,

  1143.                "Displaying the whole video surface.\n");

  1144.         memset(ow, 0, sizeof(*ow));

  1145.         memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));

  1146.     }

  1147. 

  1148.     // Inferred parameters

  1149.     sps->log2_ctb_size = sps->log2_min_cb_size +

  1150.                          sps->log2_diff_max_min_coding_block_size;

  1151.     sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

  1152. 

  1153.     if (sps->log2_ctb_size > HEVC_MAX_LOG2_CTB_SIZE) {

  1154.         av_log(avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);

  1155.         return AVERROR_INVALIDDATA;

  1156.     }

  1157.     if (sps->log2_ctb_size < 4) {

  1158.         av_log(avctx,

  1159.                AV_LOG_ERROR,

  1160.                "log2_ctb_size %d differs from the bounds of any known profile\n",

  1161.                sps->log2_ctb_size);

  1162.         avpriv_request_sample(avctx, "log2_ctb_size %d", sps->log2_ctb_size);

  1163.         return AVERROR_INVALIDDATA;

  1164.     }

  1165. 

  1166.     sps->ctb_width  = (sps->width  + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1167.     sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1168.     sps->ctb_size   = sps->ctb_width * sps->ctb_height;

  1169. 

  1170.     sps->min_cb_width  = sps->width  >> sps->log2_min_cb_size;

  1171.     sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

  1172.     sps->min_tb_width  = sps->width  >> sps->log2_min_tb_size;

  1173.     sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

  1174.     sps->min_pu_width  = sps->width  >> sps->log2_min_pu_size;

  1175.     sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

  1176.     sps->tb_mask       = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;

  1177. 

  1178.     sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

  1179. 

  1180.     if (av_mod_uintp2(sps->width, sps->log2_min_cb_size) ||

  1181.         av_mod_uintp2(sps->height, sps->log2_min_cb_size)) {

  1182.         av_log(avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  1183.         return AVERROR_INVALIDDATA;

  1184.     }

  1185. 

  1186.     if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1187.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

  1188.                sps->max_transform_hierarchy_depth_inter);

  1189.         return AVERROR_INVALIDDATA;

  1190.     }

  1191.     if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1192.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  1193.                sps->max_transform_hierarchy_depth_intra);

  1194.         return AVERROR_INVALIDDATA;

  1195.     }

  1196.     if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

  1197.         av_log(avctx, AV_LOG_ERROR,

  1198.                "max transform block size out of range: %d\n",

  1199.                sps->log2_max_trafo_size);

  1200.         return AVERROR_INVALIDDATA;

  1201.     }

  1202. 

  1203.     if (get_bits_left(gb) < 0) {

  1204.         av_log(avctx, AV_LOG_ERROR,

  1205.                "Overread SPS by %d bits\n", -get_bits_left(gb));

  1206.         return AVERROR_INVALIDDATA;

  1207.     }

  1208. 

  1209.     return 0;

  1210. }

  1211. 

  1212. int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,

  1213.                            HEVCParamSets *ps, int apply_defdispwin)

  1214. {

  1215.     HEVCSPS *sps;

  1216.     AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));

  1217.     unsigned int sps_id;

  1218.     int ret;

  1219.     ptrdiff_t nal_size;

  1220. 

  1221.     if (!sps_buf)

  1222.         return AVERROR(ENOMEM);

  1223.     sps = (HEVCSPS*)sps_buf->data;

  1224. 

  1225.     av_log(avctx, AV_LOG_DEBUG, "Decoding SPS\n");

  1226. 

  1227.     nal_size = gb->buffer_end - gb->buffer;

  1228.     if (nal_size > sizeof(sps->data)) {

  1229.         av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS "

  1230.                "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",

  1231.                nal_size, sizeof(sps->data));

  1232.         sps->data_size = sizeof(sps->data);

  1233.     } else {

  1234.         sps->data_size = nal_size;

  1235.     }

  1236.     memcpy(sps->data, gb->buffer, sps->data_size);

  1237. 

  1238.     ret = ff_hevc_parse_sps(sps, gb, &sps_id,

  1239.                             apply_defdispwin,

  1240.                             ps->vps_list, avctx);

  1241.     if (ret < 0) {

  1242.         av_buffer_unref(&sps_buf);

  1243.         return ret;

  1244.     }

  1245. 

  1246.     if (avctx->debug & FF_DEBUG_BITSTREAM) {

  1247.         av_log(avctx, AV_LOG_DEBUG,

  1248.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1249.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1250.                sps_id, sps->width, sps->height,

  1251.                sps->width - (sps->output_window.left_offset + sps->output_window.right_offset),

  1252.                sps->height - (sps->output_window.top_offset + sps->output_window.bottom_offset),

  1253.                av_get_pix_fmt_name(sps->pix_fmt));

  1254.     }

  1255. 

  1256.     /* check if this is a repeat of an already parsed SPS, then keep the

  1257.      * original one.

  1258.      * otherwise drop all PPSes that depend on it */

  1259.     if (ps->sps_list[sps_id] &&

  1260.         !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1261.         av_buffer_unref(&sps_buf);

  1262.     } else {

  1263.         remove_sps(ps, sps_id);

  1264.         ps->sps_list[sps_id] = sps_buf;

  1265.     }

  1266. 

  1267.     return 0;

  1268. }

  1269. 

  1270. static void hevc_pps_free(void *opaque, uint8_t *data)

  1271. {

  1272.     HEVCPPS *pps = (HEVCPPS*)data;

  1273. 

  1274.     av_freep(&pps->column_width);

  1275.     av_freep(&pps->row_height);

  1276.     av_freep(&pps->col_bd);

  1277.     av_freep(&pps->row_bd);

  1278.     av_freep(&pps->col_idxX);

  1279.     av_freep(&pps->ctb_addr_rs_to_ts);

  1280.     av_freep(&pps->ctb_addr_ts_to_rs);

  1281.     av_freep(&pps->tile_pos_rs);

  1282.     av_freep(&pps->tile_id);

  1283.     av_freep(&pps->min_tb_addr_zs_tab);

  1284. 

  1285.     av_freep(&pps);

  1286. }

  1287. 

  1288. static int pps_range_extensions(GetBitContext *gb, AVCodecContext *avctx,

  1289.                                 HEVCPPS *pps, HEVCSPS *sps) {

  1290.     int i;

  1291. 

  1292.     if (pps->transform_skip_enabled_flag) {

  1293.         pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;

  1294.     }

  1295.     pps->cross_component_prediction_enabled_flag = get_bits1(gb);

  1296.     pps->chroma_qp_offset_list_enabled_flag = get_bits1(gb);

  1297.     if (pps->chroma_qp_offset_list_enabled_flag) {

  1298.         pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);

  1299.         pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);

  1300.         if (pps->chroma_qp_offset_list_len_minus1 > 5) {

  1301.             av_log(avctx, AV_LOG_ERROR,

  1302.                    "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");

  1303.             return AVERROR_INVALIDDATA;

  1304.         }

  1305.         for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {

  1306.             pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);

  1307.             if (pps->cb_qp_offset_list[i]) {

  1308.                 av_log(avctx, AV_LOG_WARNING,

  1309.                        "cb_qp_offset_list not tested yet.\n");

  1310.             }

  1311.             pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);

  1312.             if (pps->cr_qp_offset_list[i]) {

  1313.                 av_log(avctx, AV_LOG_WARNING,

  1314.                        "cb_qp_offset_list not tested yet.\n");

  1315.             }

  1316.         }

  1317.     }

  1318.     pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);

  1319.     pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);

  1320. 

  1321.     if (   pps->log2_sao_offset_scale_luma   > FFMAX(sps->bit_depth        - 10, 0)

  1322.         || pps->log2_sao_offset_scale_chroma > FFMAX(sps->bit_depth_chroma - 10, 0)

  1323.     )

  1324.         return AVERROR_INVALIDDATA;

  1325. 

  1326.     return(0);

  1327. }

  1328. 

  1329. static inline int setup_pps(AVCodecContext *avctx, GetBitContext *gb,

  1330.                             HEVCPPS *pps, HEVCSPS *sps)

  1331. {

  1332.     int log2_diff;

  1333.     int pic_area_in_ctbs;

  1334.     int i, j, x, y, ctb_addr_rs, tile_id;

  1335. 

  1336.     // Inferred parameters

  1337.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1338.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1339.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1340.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX)

  1341.         return AVERROR(ENOMEM);

  1342. 

  1343.     if (pps->uniform_spacing_flag) {

  1344.         if (!pps->column_width) {

  1345.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1346.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1347.         }

  1348.         if (!pps->column_width || !pps->row_height)

  1349.             return AVERROR(ENOMEM);

  1350. 

  1351.         for (i = 0; i < pps->num_tile_columns; i++) {

  1352.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1353.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1354.         }

  1355. 

  1356.         for (i = 0; i < pps->num_tile_rows; i++) {

  1357.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1358.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1359.         }

  1360.     }

  1361. 

  1362.     pps->col_bd[0] = 0;

  1363.     for (i = 0; i < pps->num_tile_columns; i++)

  1364.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1365. 

  1366.     pps->row_bd[0] = 0;

  1367.     for (i = 0; i < pps->num_tile_rows; i++)

  1368.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1369. 

  1370.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1371.         if (i > pps->col_bd[j])

  1372.             j++;

  1373.         pps->col_idxX[i] = j;

  1374.     }

  1375. 

  1376.     /**

  1377.      * 6.5

  1378.      */

  1379.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1380. 

  1381.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1382.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1383.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1384.     pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));

  1385.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1386.         !pps->tile_id || !pps->min_tb_addr_zs_tab) {

  1387.         return AVERROR(ENOMEM);

  1388.     }

  1389. 

  1390.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1391.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1392.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1393.         int tile_x = 0;

  1394.         int tile_y = 0;

  1395.         int val    = 0;

  1396. 

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

  1398.             if (tb_x < pps->col_bd[i + 1]) {

  1399.                 tile_x = i;

  1400.                 break;

  1401.             }

  1402.         }

  1403. 

  1404.         for (i = 0; i < pps->num_tile_rows; i++) {

  1405.             if (tb_y < pps->row_bd[i + 1]) {

  1406.                 tile_y = i;

  1407.                 break;

  1408.             }

  1409.         }

  1410. 

  1411.         for (i = 0; i < tile_x; i++)

  1412.             val += pps->row_height[tile_y] * pps->column_width[i];

  1413.         for (i = 0; i < tile_y; i++)

  1414.             val += sps->ctb_width * pps->row_height[i];

  1415. 

  1416.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1417.                tb_x - pps->col_bd[tile_x];

  1418. 

  1419.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1420.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1421.     }

  1422. 

  1423.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1424.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1425.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1426.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1427.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1428. 

  1429.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1430.     if (!pps->tile_pos_rs)

  1431.         return AVERROR(ENOMEM);

  1432. 

  1433.     for (j = 0; j < pps->num_tile_rows; j++)

  1434.         for (i = 0; i < pps->num_tile_columns; i++)

  1435.             pps->tile_pos_rs[j * pps->num_tile_columns + i] =

  1436.                 pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1437. 

  1438.     log2_diff = sps->log2_ctb_size - sps->log2_min_tb_size;

  1439.     pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];

  1440.     for (y = 0; y < sps->tb_mask+2; y++) {

  1441.         pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;

  1442.         pps->min_tb_addr_zs_tab[y]    = -1;

  1443.     }

  1444.     for (y = 0; y < sps->tb_mask+1; y++) {

  1445.         for (x = 0; x < sps->tb_mask+1; x++) {

  1446.             int tb_x = x >> log2_diff;

  1447.             int tb_y = y >> log2_diff;

  1448.             int rs   = sps->ctb_width * tb_y + tb_x;

  1449.             int val  = pps->ctb_addr_rs_to_ts[rs] << (log2_diff * 2);

  1450.             for (i = 0; i < log2_diff; i++) {

  1451.                 int m = 1 << i;

  1452.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1453.             }

  1454.             pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;

  1455.         }

  1456.     }

  1457. 

  1458.     return 0;

  1459. }

  1460. 

  1461. int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,

  1462.                            HEVCParamSets *ps)

  1463. {

  1464.     HEVCSPS      *sps = NULL;

  1465.     int i, ret = 0;

  1466.     unsigned int pps_id = 0;

  1467.     ptrdiff_t nal_size;

  1468.     unsigned log2_parallel_merge_level_minus2;

  1469. 

  1470.     AVBufferRef *pps_buf;

  1471.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1472. 

  1473.     if (!pps)

  1474.         return AVERROR(ENOMEM);

  1475. 

  1476.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1477.                                hevc_pps_free, NULL, 0);

  1478.     if (!pps_buf) {

  1479.         av_freep(&pps);

  1480.         return AVERROR(ENOMEM);

  1481.     }

  1482. 

  1483.     av_log(avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1484. 

  1485.     nal_size = gb->buffer_end - gb->buffer;

  1486.     if (nal_size > sizeof(pps->data)) {

  1487.         av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "

  1488.                "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",

  1489.                nal_size, sizeof(pps->data));

  1490.         pps->data_size = sizeof(pps->data);

  1491.     } else {

  1492.         pps->data_size = nal_size;

  1493.     }

  1494.     memcpy(pps->data, gb->buffer, pps->data_size);

  1495. 

  1496.     // Default values

  1497.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1498.     pps->num_tile_columns                      = 1;

  1499.     pps->num_tile_rows                         = 1;

  1500.     pps->uniform_spacing_flag                  = 1;

  1501.     pps->disable_dbf                           = 0;

  1502.     pps->beta_offset                           = 0;

  1503.     pps->tc_offset                             = 0;

  1504.     pps->log2_max_transform_skip_block_size    = 2;

  1505. 

  1506.     // Coded parameters

  1507.     pps_id = get_ue_golomb_long(gb);

  1508.     if (pps_id >= HEVC_MAX_PPS_COUNT) {

  1509.         av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1510.         ret = AVERROR_INVALIDDATA;

  1511.         goto err;

  1512.     }

  1513.     pps->sps_id = get_ue_golomb_long(gb);

  1514.     if (pps->sps_id >= HEVC_MAX_SPS_COUNT) {

  1515.         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1516.         ret = AVERROR_INVALIDDATA;

  1517.         goto err;

  1518.     }

  1519.     if (!ps->sps_list[pps->sps_id]) {

  1520.         av_log(avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1521.         ret = AVERROR_INVALIDDATA;

  1522.         goto err;

  1523.     }

  1524.     sps = (HEVCSPS *)ps->sps_list[pps->sps_id]->data;

  1525. 

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

  1527.     pps->output_flag_present_flag              = get_bits1(gb);

  1528.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1529. 

  1530.     pps->sign_data_hiding_flag = get_bits1(gb);

  1531. 

  1532.     pps->cabac_init_present_flag = get_bits1(gb);

  1533. 

  1534.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1535.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1536. 

  1537.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1538. 

  1539.     pps->constrained_intra_pred_flag = get_bits1(gb);

  1540.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1541. 

  1542.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1543.     pps->diff_cu_qp_delta_depth   = 0;

  1544.     if (pps->cu_qp_delta_enabled_flag)

  1545.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1546. 

  1547.     if (pps->diff_cu_qp_delta_depth < 0 ||

  1548.         pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {

  1549.         av_log(avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",

  1550.                pps->diff_cu_qp_delta_depth);

  1551.         ret = AVERROR_INVALIDDATA;

  1552.         goto err;

  1553.     }

  1554. 

  1555.     pps->cb_qp_offset = get_se_golomb(gb);

  1556.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1557.         av_log(avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1558.                pps->cb_qp_offset);

  1559.         ret = AVERROR_INVALIDDATA;

  1560.         goto err;

  1561.     }

  1562.     pps->cr_qp_offset = get_se_golomb(gb);

  1563.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1564.         av_log(avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1565.                pps->cr_qp_offset);

  1566.         ret = AVERROR_INVALIDDATA;

  1567.         goto err;

  1568.     }

  1569.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1570. 

  1571.     pps->weighted_pred_flag   = get_bits1(gb);

  1572.     pps->weighted_bipred_flag = get_bits1(gb);

  1573. 

  1574.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

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

  1576.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1577. 

  1578.     if (pps->tiles_enabled_flag) {

  1579.         int num_tile_columns_minus1 = get_ue_golomb(gb);

  1580.         int num_tile_rows_minus1    = get_ue_golomb(gb);

  1581. 

  1582.         if (num_tile_columns_minus1 < 0 ||

  1583.             num_tile_columns_minus1 >= sps->ctb_width) {

  1584.             av_log(avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1585.                    num_tile_columns_minus1);

  1586.             ret = num_tile_columns_minus1 < 0 ? num_tile_columns_minus1 : AVERROR_INVALIDDATA;

  1587.             goto err;

  1588.         }

  1589.         if (num_tile_rows_minus1 < 0 ||

  1590.             num_tile_rows_minus1 >= sps->ctb_height) {

  1591.             av_log(avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1592.                    num_tile_rows_minus1);

  1593.             ret = num_tile_rows_minus1 < 0 ? num_tile_rows_minus1 : AVERROR_INVALIDDATA;

  1594.             goto err;

  1595.         }

  1596.         pps->num_tile_columns = num_tile_columns_minus1 + 1;

  1597.         pps->num_tile_rows    = num_tile_rows_minus1    + 1;

  1598. 

  1599.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1600.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1601.         if (!pps->column_width || !pps->row_height) {

  1602.             ret = AVERROR(ENOMEM);

  1603.             goto err;

  1604.         }

  1605. 

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

  1607.         if (!pps->uniform_spacing_flag) {

  1608.             uint64_t sum = 0;

  1609.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1610.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1611.                 sum                 += pps->column_width[i];

  1612.             }

  1613.             if (sum >= sps->ctb_width) {

  1614.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1615.                 ret = AVERROR_INVALIDDATA;

  1616.                 goto err;

  1617.             }

  1618.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1619. 

  1620.             sum = 0;

  1621.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1622.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1623.                 sum               += pps->row_height[i];

  1624.             }

  1625.             if (sum >= sps->ctb_height) {

  1626.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1627.                 ret = AVERROR_INVALIDDATA;

  1628.                 goto err;

  1629.             }

  1630.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1631.         }

  1632.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1633.     }

  1634. 

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

  1636. 

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

  1638.     if (pps->deblocking_filter_control_present_flag) {

  1639.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1640.         pps->disable_dbf                             = get_bits1(gb);

  1641.         if (!pps->disable_dbf) {

  1642.             int beta_offset_div2 = get_se_golomb(gb);

  1643.             int tc_offset_div2   = get_se_golomb(gb) ;

  1644.             if (beta_offset_div2 < -6 || beta_offset_div2 > 6) {

  1645.                 av_log(avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1646.                        beta_offset_div2);

  1647.                 ret = AVERROR_INVALIDDATA;

  1648.                 goto err;

  1649.             }

  1650.             if (tc_offset_div2 < -6 || tc_offset_div2 > 6) {

  1651.                 av_log(avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1652.                        tc_offset_div2);

  1653.                 ret = AVERROR_INVALIDDATA;

  1654.                 goto err;

  1655.             }

  1656.             pps->beta_offset = 2 * beta_offset_div2;

  1657.             pps->tc_offset   = 2 *   tc_offset_div2;

  1658.         }

  1659.     }

  1660. 

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

  1662.     if (pps->scaling_list_data_present_flag) {

  1663.         set_default_scaling_list_data(&pps->scaling_list);

  1664.         ret = scaling_list_data(gb, avctx, &pps->scaling_list, sps);

  1665.         if (ret < 0)

  1666.             goto err;

  1667.     }

  1668.     pps->lists_modification_present_flag = get_bits1(gb);

  1669.     log2_parallel_merge_level_minus2     = get_ue_golomb_long(gb);

  1670.     if (log2_parallel_merge_level_minus2 > sps->log2_ctb_size) {

  1671.         av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1672.                log2_parallel_merge_level_minus2);

  1673.         ret = AVERROR_INVALIDDATA;

  1674.         goto err;

  1675.     }

  1676.     pps->log2_parallel_merge_level       = log2_parallel_merge_level_minus2 + 2;

  1677. 

  1678.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1679. 

  1680.     if (get_bits1(gb)) { // pps_extension_present_flag

  1681.         pps->pps_range_extensions_flag = get_bits1(gb);

  1682.         skip_bits(gb, 7); // pps_extension_7bits

  1683.         if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps->pps_range_extensions_flag) {

  1684.             if ((ret = pps_range_extensions(gb, avctx, pps, sps)) < 0)

  1685.                 goto err;

  1686.         }

  1687.     }

  1688. 

  1689.     ret = setup_pps(avctx, gb, pps, sps);

  1690.     if (ret < 0)

  1691.         goto err;

  1692. 

  1693.     if (get_bits_left(gb) < 0) {

  1694.         av_log(avctx, AV_LOG_ERROR,

  1695.                "Overread PPS by %d bits\n", -get_bits_left(gb));

  1696.         goto err;

  1697.     }

  1698. 

  1699.     remove_pps(ps, pps_id);

  1700.     ps->pps_list[pps_id] = pps_buf;

  1701. 

  1702.     return 0;

  1703. 

  1704. err:

  1705.     av_buffer_unref(&pps_buf);

  1706.     return ret;

  1707. }

  1708. 

  1709. void ff_hevc_ps_uninit(HEVCParamSets *ps)

  1710. {

  1711.     int i;

  1712. 

  1713.     for (i = 0; i < FF_ARRAY_ELEMS(ps->vps_list); i++)

  1714.         av_buffer_unref(&ps->vps_list[i]);

  1715.     for (i = 0; i < FF_ARRAY_ELEMS(ps->sps_list); i++)

  1716.         av_buffer_unref(&ps->sps_list[i]);

  1717.     for (i = 0; i < FF_ARRAY_ELEMS(ps->pps_list); i++)

  1718.         av_buffer_unref(&ps->pps_list[i]);

  1719. 

  1720.     ps->sps = NULL;

  1721.     ps->pps = NULL;

  1722.     ps->vps = NULL;

  1723. }

  1724. 

  1725. int ff_hevc_compute_poc(const HEVCSPS *sps, int pocTid0, int poc_lsb, int nal_unit_type)

  1726. {

  1727.     int max_poc_lsb  = 1 << sps->log2_max_poc_lsb;

  1728.     int prev_poc_lsb = pocTid0 % max_poc_lsb;

  1729.     int prev_poc_msb = pocTid0 - prev_poc_lsb;

  1730.     int poc_msb;

  1731. 

  1732.     if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)

  1733.         poc_msb = prev_poc_msb + max_poc_lsb;

  1734.     else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)

  1735.         poc_msb = prev_poc_msb - max_poc_lsb;

  1736.     else

  1737.         poc_msb = prev_poc_msb;

  1738. 

  1739.     // For BLA picture types, POCmsb is set to 0.

  1740.     if (nal_unit_type == HEVC_NAL_BLA_W_LP   ||

  1741.         nal_unit_type == HEVC_NAL_BLA_W_RADL ||

  1742.         nal_unit_type == HEVC_NAL_BLA_N_LP)

  1743.         poc_msb = 0;

  1744. 

  1745.     return poc_msb + poc_lsb;

  1746. }