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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.h"

  29. 

  30. static const uint8_t default_scaling_list_intra[] = {

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

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

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

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

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

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

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

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

  39. };

  40. 

  41. static const uint8_t default_scaling_list_inter[] = {

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

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

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

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

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

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

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

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

  50. };

  51. 

  52. static const AVRational vui_sar[] = {

  53.     {  0,   1 },

  54.     {  1,   1 },

  55.     { 12,  11 },

  56.     { 10,  11 },

  57.     { 16,  11 },

  58.     { 40,  33 },

  59.     { 24,  11 },

  60.     { 20,  11 },

  61.     { 32,  11 },

  62.     { 80,  33 },

  63.     { 18,  11 },

  64.     { 15,  11 },

  65.     { 64,  33 },

  66.     { 160, 99 },

  67.     {  4,   3 },

  68.     {  3,   2 },

  69.     {  2,   1 },

  70. };

  71. 

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

  73.                                   const HEVCSPS *sps, int is_slice_header)

  74. {

  75.     HEVCLocalContext *lc = s->HEVClc;

  76.     uint8_t rps_predict = 0;

  77.     int delta_poc;

  78.     int k0 = 0;

  79.     int k1 = 0;

  80.     int k  = 0;

  81.     int i;

  82. 

  83.     GetBitContext *gb = &lc->gb;

  84. 

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

  86.         rps_predict = get_bits1(gb);

  87. 

  88.     if (rps_predict) {

  89.         const ShortTermRPS *rps_ridx;

  90.         int delta_rps, abs_delta_rps;

  91.         uint8_t use_delta_flag = 0;

  92.         uint8_t delta_rps_sign;

  93. 

  94.         if (is_slice_header) {

  95.             int delta_idx = get_ue_golomb_long(gb) + 1;

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

  97.                 av_log(s->avctx, AV_LOG_ERROR,

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

  99.                        delta_idx, sps->nb_st_rps);

  100.                 return AVERROR_INVALIDDATA;

  101.             }

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

  103.         } else

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

  105. 

  106.         delta_rps_sign = get_bits1(gb);

  107.         abs_delta_rps  = get_ue_golomb_long(gb) + 1;

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

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

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

  111. 

  112.             if (!used)

  113.                 use_delta_flag = get_bits1(gb);

  114. 

  115.             if (used || use_delta_flag) {

  116.                 if (i < rps_ridx->num_delta_pocs)

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

  118.                 else

  119.                     delta_poc = delta_rps;

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

  121.                 if (delta_poc < 0)

  122.                     k0++;

  123.                 else

  124.                     k1++;

  125.                 k++;

  126.             }

  127.         }

  128. 

  129.         rps->num_delta_pocs    = k;

  130.         rps->num_negative_pics = k0;

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

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

  133.             int used, tmp;

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

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

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

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

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

  139.                     if (delta_poc < tmp) {

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

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

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

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

  144.                     }

  145.                 }

  146.             }

  147.         }

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

  149.             int used;

  150.             k = rps->num_negative_pics - 1;

  151.             // flip the negative values to largest first

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

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

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

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

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

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

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

  159.                 k--;

  160.             }

  161.         }

  162.     } else {

  163.         unsigned int prev, nb_positive_pics;

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

  165.         nb_positive_pics       = get_ue_golomb_long(gb);

  166. 

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

  168.             nb_positive_pics >= MAX_REFS) {

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

  170.             return AVERROR_INVALIDDATA;

  171.         }

  172. 

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

  174.         if (rps->num_delta_pocs) {

  175.             prev = 0;

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

  177.                 delta_poc = get_ue_golomb_long(gb) + 1;

  178.                 prev -= delta_poc;

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

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

  181.             }

  182.             prev = 0;

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

  184.                 delta_poc = get_ue_golomb_long(gb) + 1;

  185.                 prev += delta_poc;

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

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

  188.             }

  189.         }

  190.     }

  191.     return 0;

  192. }

  193. 

  194. 

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

  196. {

  197.     int i;

  198.     HEVCLocalContext *lc = s->HEVClc;

  199.     GetBitContext *gb = &lc->gb;

  200. 

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

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

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

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

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

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

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

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

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

  210.     else

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

  212. 

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

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

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

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

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

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

  219. 

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

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

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

  223. }

  224. 

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

  226. {

  227.     int i;

  228.     HEVCLocalContext *lc = s->HEVClc;

  229.     GetBitContext *gb = &lc->gb;

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

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

  232. 

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

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

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

  236.     }

  237.     if (max_num_sub_layers - 1> 0)

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

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

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

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

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

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

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

  245.     }

  246. }

  247. 

  248. static void decode_sublayer_hrd(HEVCContext *s, int nb_cpb,

  249.                                 int subpic_params_present)

  250. {

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

  252.     int i;

  253. 

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

  255.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  256.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  257. 

  258.         if (subpic_params_present) {

  259.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  260.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  261.         }

  262.         skip_bits1(gb); // cbr_flag

  263.     }

  264. }

  265. 

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

  267.                        int max_sublayers)

  268. {

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

  270.     int nal_params_present = 0, vcl_params_present = 0;

  271.     int subpic_params_present = 0;

  272.     int i;

  273. 

  274.     if (common_inf_present) {

  275.         nal_params_present = get_bits1(gb);

  276.         vcl_params_present = get_bits1(gb);

  277. 

  278.         if (nal_params_present || vcl_params_present) {

  279.             subpic_params_present = get_bits1(gb);

  280. 

  281.             if (subpic_params_present) {

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

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

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

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

  286.             }

  287. 

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

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

  290. 

  291.             if (subpic_params_present)

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

  293. 

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

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

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

  297.         }

  298.     }

  299. 

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

  301.         int low_delay = 0;

  302.         int nb_cpb = 1;

  303.         int fixed_rate = get_bits1(gb);

  304. 

  305.         if (!fixed_rate)

  306.             fixed_rate = get_bits1(gb);

  307. 

  308.         if (fixed_rate)

  309.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  310.         else

  311.             low_delay = get_bits1(gb);

  312. 

  313.         if (!low_delay)

  314.             nb_cpb = get_ue_golomb_long(gb) + 1;

  315. 

  316.         if (nal_params_present)

  317.             decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

  318.         if (vcl_params_present)

  319.             decode_sublayer_hrd(s, nb_cpb, subpic_params_present);

  320.     }

  321. }

  322. 

  323. int ff_hevc_decode_nal_vps(HEVCContext *s)

  324. {

  325.     int i,j;

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

  327.     int vps_id = 0;

  328.     HEVCVPS *vps;

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

  330. 

  331.     if (!vps_buf)

  332.         return AVERROR(ENOMEM);

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

  334. 

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

  336. 

  337.     vps_id = get_bits(gb, 4);

  338.     if (vps_id >= MAX_VPS_COUNT) {

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

  340.         goto err;

  341.     }

  342. 

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

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

  345.         goto err;

  346.     }

  347. 

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

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

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

  351. 

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

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

  354.         goto err;

  355.     }

  356. 

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

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

  359.                vps->vps_max_sub_layers);

  360.         goto err;

  361.     }

  362. 

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

  364. 

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

  366. 

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

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

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

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

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

  372. 

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

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

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

  376.             goto err;

  377.         }

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

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

  380.                    vps->vps_num_reorder_pics[i]);

  381.             goto err;

  382.         }

  383.     }

  384. 

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

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

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

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

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

  390. 

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

  392.     if (vps->vps_timing_info_present_flag) {

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

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

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

  396.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  400.             int common_inf_present = 1;

  401. 

  402.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  403.             if (i)

  404.                 common_inf_present = get_bits1(gb);

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

  406.         }

  407.     }

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

  409. 

  410.     av_buffer_unref(&s->vps_list[vps_id]);

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

  412.     return 0;

  413. 

  414. err:

  415.     av_buffer_unref(&vps_buf);

  416.     return AVERROR_INVALIDDATA;

  417. }

  418. 

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

  420. {

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

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

  423.     int sar_present;

  424. 

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

  426. 

  427.     sar_present = get_bits1(gb);

  428.     if (sar_present) {

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

  430.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  432.         else if (sar_idx == 255) {

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

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

  435.         } else

  436.             av_log(s->avctx, AV_LOG_WARNING,

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

  438.     }

  439. 

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

  441.     if (vui->overscan_info_present_flag)

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

  443. 

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

  445.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  450.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  451.         if (vui->colour_description_present_flag) {

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

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

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

  455. 

  456.             // Set invalid values to "unspecified"

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

  458.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  460.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  462.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

  463.         }

  464.     }

  465. 

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

  467.     if (vui->chroma_loc_info_present_flag) {

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

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

  470.     }

  471. 

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

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

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

  475. 

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

  477.     if (vui->default_display_window_flag) {

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

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

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

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

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

  483. 

  484.         if (s->apply_defdispwin &&

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

  486.             av_log(s->avctx, AV_LOG_DEBUG,

  487.                    "discarding vui default display window, "

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

  489.                    vui->def_disp_win.left_offset,

  490.                    vui->def_disp_win.right_offset,

  491.                    vui->def_disp_win.top_offset,

  492.                    vui->def_disp_win.bottom_offset);

  493. 

  494.             vui->def_disp_win.left_offset   =

  495.             vui->def_disp_win.right_offset  =

  496.             vui->def_disp_win.top_offset    =

  497.             vui->def_disp_win.bottom_offset = 0;

  498.         }

  499.     }

  500. 

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

  502. 

  503.     if (vui->vui_timing_info_present_flag) {

  504.         vui->vui_num_units_in_tick               = get_bits(gb, 32);

  505.         vui->vui_time_scale                      = get_bits(gb, 32);

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

  507.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  510.         if (vui->vui_hrd_parameters_present_flag)

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

  512.     }

  513. 

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

  515.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  524.     }

  525. }

  526. 

  527. static void set_default_scaling_list_data(ScalingList *sl)

  528. {

  529.     int matrixId;

  530. 

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

  532.         // 4x4 default is 16

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

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

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

  536.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  551. }

  552. 

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

  554. {

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

  556.     uint8_t scaling_list_pred_mode_flag[4][6];

  557.     int32_t scaling_list_dc_coef[2][6];

  558.     int size_id, matrix_id, i, pos, delta;

  559. 

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

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

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

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

  564.                 delta = get_ue_golomb_long(gb);

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

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

  567.                 if (delta) {

  568.                     // Copy from previous array.

  569.                     if (matrix_id - delta < 0) {

  570.                         av_log(s->avctx, AV_LOG_ERROR,

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

  572.                         return AVERROR_INVALIDDATA;

  573.                     }

  574. 

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

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

  577.                            size_id > 0 ? 64 : 16);

  578.                     if (size_id > 1)

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

  580.                 }

  581.             } else {

  582.                 int next_coef, coef_num;

  583.                 int32_t scaling_list_delta_coef;

  584. 

  585.                 next_coef = 8;

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

  587.                 if (size_id > 1) {

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

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

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

  591.                 }

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

  593.                     if (size_id == 0)

  594.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  595.                                   ff_hevc_diag_scan4x4_x[i];

  596.                     else

  597.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  598.                                   ff_hevc_diag_scan8x8_x[i];

  599. 

  600.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  603.                 }

  604.             }

  605.         }

  606. 

  607.     return 0;

  608. }

  609. 

  610. int ff_hevc_decode_nal_sps(HEVCContext *s)

  611. {

  612.     const AVPixFmtDescriptor *desc;

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

  614.     int ret    = 0;

  615.     int sps_id = 0;

  616.     int log2_diff_max_min_transform_block_size;

  617.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  618.     int i;

  619. 

  620.     HEVCSPS *sps;

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

  622. 

  623.     if (!sps_buf)

  624.         return AVERROR(ENOMEM);

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

  626. 

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

  628. 

  629.     // Coded parameters

  630. 

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

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

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

  634.         ret = AVERROR_INVALIDDATA;

  635.         goto err;

  636.     }

  637. 

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

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

  640.                sps->vps_id);

  641.         ret = AVERROR_INVALIDDATA;

  642.         goto err;

  643.     }

  644. 

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

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

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

  648.                sps->max_sub_layers);

  649.         ret = AVERROR_INVALIDDATA;

  650.         goto err;

  651.     }

  652. 

  653.     skip_bits1(gb); // temporal_id_nesting_flag

  654. 

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

  656. 

  657.     sps_id = get_ue_golomb_long(gb);

  658.     if (sps_id >= MAX_SPS_COUNT) {

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

  660.         ret = AVERROR_INVALIDDATA;

  661.         goto err;

  662.     }

  663. 

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

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

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

  667.         ret = AVERROR_PATCHWELCOME;

  668.         goto err;

  669.     }

  670. 

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

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

  673. 

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

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

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

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

  678.         goto err;

  679. 

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

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

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

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

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

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

  686. 

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

  688.             av_log(s->avctx, AV_LOG_DEBUG,

  689.                    "discarding sps conformance window, "

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

  691.                    sps->pic_conf_win.left_offset,

  692.                    sps->pic_conf_win.right_offset,

  693.                    sps->pic_conf_win.top_offset,

  694.                    sps->pic_conf_win.bottom_offset);

  695. 

  696.             sps->pic_conf_win.left_offset   =

  697.             sps->pic_conf_win.right_offset  =

  698.             sps->pic_conf_win.top_offset    =

  699.             sps->pic_conf_win.bottom_offset = 0;

  700.         }

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

  702.     }

  703. 

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

  705.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  707.         av_log(s->avctx, AV_LOG_ERROR,

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

  709.                "this is unsupported.\n",

  710.                sps->bit_depth, bit_depth_chroma);

  711.         ret = AVERROR_INVALIDDATA;

  712.         goto err;

  713.     }

  714. 

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

  716.         switch (sps->bit_depth) {

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

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

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

  720.         default:

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

  722.                    sps->bit_depth);

  723.             ret = AVERROR_PATCHWELCOME;

  724.             goto err;

  725.         }

  726.     } else {

  727.         av_log(s->avctx, AV_LOG_ERROR,

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

  729.         return AVERROR_PATCHWELCOME;

  730.     }

  731. 

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

  733.     if (!desc) {

  734.         ret = AVERROR(EINVAL);

  735.         goto err;

  736.     }

  737. 

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

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

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

  741. 

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

  743. 

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

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

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

  747.                sps->log2_max_poc_lsb - 4);

  748.         ret = AVERROR_INVALIDDATA;

  749.         goto err;

  750.     }

  751. 

  752.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  761.             ret = AVERROR_INVALIDDATA;

  762.             goto err;

  763.         }

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

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

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

  767.             if (sps->temporal_layer[i].num_reorder_pics > MAX_DPB_SIZE - 1) {

  768.                 ret = AVERROR_INVALIDDATA;

  769.                 goto err;

  770.             }

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

  772.         }

  773.     }

  774. 

  775.     if (!sublayer_ordering_info) {

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

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

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

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

  780.         }

  781.     }

  782. 

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

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

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

  786.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  787.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  788.                                                sps->log2_min_tb_size;

  789. 

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

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

  792.         ret = AVERROR_INVALIDDATA;

  793.         goto err;

  794.     }

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

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

  797. 

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

  799.     if (sps->scaling_list_enable_flag) {

  800.         set_default_scaling_list_data(&sps->scaling_list);

  801. 

  802.         if (get_bits1(gb)) {

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

  804.             if (ret < 0)

  805.                 goto err;

  806.         }

  807.     }

  808. 

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

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

  811. 

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

  813.     if (sps->pcm_enabled_flag) {

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

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

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

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

  818.                                         get_ue_golomb_long(gb);

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

  820.             av_log(s->avctx, AV_LOG_ERROR,

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

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

  823.             ret = AVERROR_INVALIDDATA;

  824.             goto err;

  825.         }

  826. 

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

  828.     }

  829. 

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

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

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

  833.                sps->nb_st_rps);

  834.         ret = AVERROR_INVALIDDATA;

  835.         goto err;

  836.     }

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

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

  839.                                                  sps, 0)) < 0)

  840.             goto err;

  841.     }

  842. 

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

  844.     if (sps->long_term_ref_pics_present_flag) {

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

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

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

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

  849.         }

  850.     }

  851. 

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

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

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

  855.     vui_present = get_bits1(gb);

  856.     if (vui_present)

  857.         decode_vui(s, sps);

  858.     skip_bits1(gb); // sps_extension_flag

  859. 

  860.     if (s->apply_defdispwin) {

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

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

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

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

  865.     }

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

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

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

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

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

  871.                sps->output_window.left_offset);

  872.     }

  873.     sps->output_width  = sps->width -

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

  875.     sps->output_height = sps->height -

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

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

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

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

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

  881.             ret = AVERROR_INVALIDDATA;

  882.             goto err;

  883.         }

  884.         av_log(s->avctx, AV_LOG_WARNING,

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

  886.         sps->pic_conf_win.left_offset   =

  887.         sps->pic_conf_win.right_offset  =

  888.         sps->pic_conf_win.top_offset    =

  889.         sps->pic_conf_win.bottom_offset = 0;

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

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

  892.     }

  893. 

  894.     // Inferred parameters

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

  896.                          sps->log2_diff_max_min_coding_block_size;

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

  898. 

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

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

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

  902. 

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

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

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

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

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

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

  909. 

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

  911. 

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

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

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

  915.         goto err;

  916.     }

  917. 

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

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

  920.         goto err;

  921.     }

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

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

  924.                sps->max_transform_hierarchy_depth_inter);

  925.         goto err;

  926.     }

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

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

  929.                sps->max_transform_hierarchy_depth_intra);

  930.         goto err;

  931.     }

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

  933.         av_log(s->avctx, AV_LOG_ERROR,

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

  935.                sps->log2_max_trafo_size);

  936.         goto err;

  937.     }

  938. 

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

  940.         av_log(s->avctx, AV_LOG_DEBUG,

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

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

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

  944.                sps->output_width, sps->output_height,

  945.                av_get_pix_fmt_name(sps->pix_fmt));

  946.     }

  947. 

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

  949.      * original one.

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

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

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

  953.         av_buffer_unref(&sps_buf);

  954.     } else {

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

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

  957.                 av_buffer_unref(&s->pps_list[i]);

  958.         }

  959.         av_buffer_unref(&s->sps_list[sps_id]);

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

  961.     }

  962. 

  963.     return 0;

  964. 

  965. err:

  966.     av_buffer_unref(&sps_buf);

  967.     return ret;

  968. }

  969. 

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

  971. {

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

  973. 

  974.     av_freep(&pps->column_width);

  975.     av_freep(&pps->row_height);

  976.     av_freep(&pps->col_bd);

  977.     av_freep(&pps->row_bd);

  978.     av_freep(&pps->col_idxX);

  979.     av_freep(&pps->ctb_addr_rs_to_ts);

  980.     av_freep(&pps->ctb_addr_ts_to_rs);

  981.     av_freep(&pps->tile_pos_rs);

  982.     av_freep(&pps->tile_id);

  983.     av_freep(&pps->min_cb_addr_zs);

  984.     av_freep(&pps->min_tb_addr_zs);

  985. 

  986.     av_freep(&pps);

  987. }

  988. 

  989. int ff_hevc_decode_nal_pps(HEVCContext *s)

  990. {

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

  992.     HEVCSPS      *sps = NULL;

  993.     int pic_area_in_ctbs, pic_area_in_min_cbs, pic_area_in_min_tbs;

  994.     int log2_diff_ctb_min_tb_size;

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

  996.     int ret    = 0;

  997.     int pps_id = 0;

  998. 

  999.     AVBufferRef *pps_buf;

  1000.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1001. 

  1002.     if (!pps)

  1003.         return AVERROR(ENOMEM);

  1004. 

  1005.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1006.                                hevc_pps_free, NULL, 0);

  1007.     if (!pps_buf) {

  1008.         av_freep(&pps);

  1009.         return AVERROR(ENOMEM);

  1010.     }

  1011. 

  1012.     av_log(s->avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1013. 

  1014.     // Default values

  1015.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1016.     pps->num_tile_columns                      = 1;

  1017.     pps->num_tile_rows                         = 1;

  1018.     pps->uniform_spacing_flag                  = 1;

  1019.     pps->disable_dbf                           = 0;

  1020.     pps->beta_offset                           = 0;

  1021.     pps->tc_offset                             = 0;

  1022. 

  1023.     // Coded parameters

  1024.     pps_id = get_ue_golomb_long(gb);

  1025.     if (pps_id >= MAX_PPS_COUNT) {

  1026.         av_log(s->avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1027.         ret = AVERROR_INVALIDDATA;

  1028.         goto err;

  1029.     }

  1030.     pps->sps_id = get_ue_golomb_long(gb);

  1031.     if (pps->sps_id >= MAX_SPS_COUNT) {

  1032.         av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1033.         ret = AVERROR_INVALIDDATA;

  1034.         goto err;

  1035.     }

  1036.     if (!s->sps_list[pps->sps_id]) {

  1037.         av_log(s->avctx, AV_LOG_ERROR, "SPS does not exist \n");

  1038.         ret = AVERROR_INVALIDDATA;

  1039.         goto err;

  1040.     }

  1041.     sps = (HEVCSPS *)s->sps_list[pps->sps_id]->data;

  1042. 

  1043.     pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

  1044.     pps->output_flag_present_flag              = get_bits1(gb);

  1045.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1046. 

  1047.     pps->sign_data_hiding_flag = get_bits1(gb);

  1048. 

  1049.     pps->cabac_init_present_flag = get_bits1(gb);

  1050. 

  1051.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1052.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1053. 

  1054.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1055. 

  1056.     pps->constrained_intra_pred_flag = get_bits1(gb);

  1057.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1058. 

  1059.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1060.     pps->diff_cu_qp_delta_depth   = 0;

  1061.     if (pps->cu_qp_delta_enabled_flag)

  1062.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1063. 

  1064.     pps->cb_qp_offset = get_se_golomb(gb);

  1065.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1066.         av_log(s->avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1067.                pps->cb_qp_offset);

  1068.         ret = AVERROR_INVALIDDATA;

  1069.         goto err;

  1070.     }

  1071.     pps->cr_qp_offset = get_se_golomb(gb);

  1072.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1073.         av_log(s->avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1074.                pps->cr_qp_offset);

  1075.         ret = AVERROR_INVALIDDATA;

  1076.         goto err;

  1077.     }

  1078.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1079. 

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

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

  1082. 

  1083.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

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

  1085.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1086. 

  1087.     if (pps->tiles_enabled_flag) {

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

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

  1090.         if (pps->num_tile_columns == 0 ||

  1091.             pps->num_tile_columns >= sps->width) {

  1092.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1093.                    pps->num_tile_columns - 1);

  1094.             ret = AVERROR_INVALIDDATA;

  1095.             goto err;

  1096.         }

  1097.         if (pps->num_tile_rows == 0 ||

  1098.             pps->num_tile_rows >= sps->height) {

  1099.             av_log(s->avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1100.                    pps->num_tile_rows - 1);

  1101.             ret = AVERROR_INVALIDDATA;

  1102.             goto err;

  1103.         }

  1104. 

  1105.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1106.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1107.         if (!pps->column_width || !pps->row_height) {

  1108.             ret = AVERROR(ENOMEM);

  1109.             goto err;

  1110.         }

  1111. 

  1112.         pps->uniform_spacing_flag = get_bits1(gb);

  1113.         if (!pps->uniform_spacing_flag) {

  1114.             uint64_t sum = 0;

  1115.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1116.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1117.                 sum                 += pps->column_width[i];

  1118.             }

  1119.             if (sum >= sps->ctb_width) {

  1120.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1121.                 ret = AVERROR_INVALIDDATA;

  1122.                 goto err;

  1123.             }

  1124.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1125. 

  1126.             sum = 0;

  1127.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1128.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1129.                 sum               += pps->row_height[i];

  1130.             }

  1131.             if (sum >= sps->ctb_height) {

  1132.                 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1133.                 ret = AVERROR_INVALIDDATA;

  1134.                 goto err;

  1135.             }

  1136.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1137.         }

  1138.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1139.     }

  1140. 

  1141.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1142. 

  1143.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1144.     if (pps->deblocking_filter_control_present_flag) {

  1145.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1146.         pps->disable_dbf                             = get_bits1(gb);

  1147.         if (!pps->disable_dbf) {

  1148.             pps->beta_offset = get_se_golomb(gb) * 2;

  1149.             pps->tc_offset = get_se_golomb(gb) * 2;

  1150.             if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

  1151.                 av_log(s->avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1152.                        pps->beta_offset/2);

  1153.                 ret = AVERROR_INVALIDDATA;

  1154.                 goto err;

  1155.             }

  1156.             if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

  1157.                 av_log(s->avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1158.                        pps->tc_offset/2);

  1159.                 ret = AVERROR_INVALIDDATA;

  1160.                 goto err;

  1161.             }

  1162.         }

  1163.     }

  1164. 

  1165.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1166.     if (pps->scaling_list_data_present_flag) {

  1167.         set_default_scaling_list_data(&pps->scaling_list);

  1168.         ret = scaling_list_data(s, &pps->scaling_list);

  1169.         if (ret < 0)

  1170.             goto err;

  1171.     }

  1172.     pps->lists_modification_present_flag = get_bits1(gb);

  1173.     pps->log2_parallel_merge_level       = get_ue_golomb_long(gb) + 2;

  1174.     if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {

  1175.         av_log(s->avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1176.                pps->log2_parallel_merge_level - 2);

  1177.         ret = AVERROR_INVALIDDATA;

  1178.         goto err;

  1179.     }

  1180. 

  1181.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1182.     skip_bits1(gb);     // pps_extension_flag

  1183. 

  1184.     // Inferred parameters

  1185.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1186.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1187.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1188.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX) {

  1189.         ret = AVERROR(ENOMEM);

  1190.         goto err;

  1191.     }

  1192. 

  1193.     if (pps->uniform_spacing_flag) {

  1194.         if (!pps->column_width) {

  1195.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1196.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1197.         }

  1198.         if (!pps->column_width || !pps->row_height) {

  1199.             ret = AVERROR(ENOMEM);

  1200.             goto err;

  1201.         }

  1202. 

  1203.         for (i = 0; i < pps->num_tile_columns; i++) {

  1204.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1205.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1206.         }

  1207. 

  1208.         for (i = 0; i < pps->num_tile_rows; i++) {

  1209.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1210.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1211.         }

  1212.     }

  1213. 

  1214.     pps->col_bd[0] = 0;

  1215.     for (i = 0; i < pps->num_tile_columns; i++)

  1216.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1217. 

  1218.     pps->row_bd[0] = 0;

  1219.     for (i = 0; i < pps->num_tile_rows; i++)

  1220.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1221. 

  1222.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1223.         if (i > pps->col_bd[j])

  1224.             j++;

  1225.         pps->col_idxX[i] = j;

  1226.     }

  1227. 

  1228.     /**

  1229.      * 6.5

  1230.      */

  1231.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1232.     pic_area_in_min_cbs  = sps->min_cb_width * sps->min_cb_height;

  1233.     pic_area_in_min_tbs  = sps->min_tb_width * sps->min_tb_height;

  1234. 

  1235.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1236.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1237.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1238.     pps->min_cb_addr_zs    = av_malloc_array(pic_area_in_min_cbs, sizeof(*pps->min_cb_addr_zs));

  1239.     pps->min_tb_addr_zs    = av_malloc_array(pic_area_in_min_tbs, sizeof(*pps->min_tb_addr_zs));

  1240.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1241.         !pps->tile_id || !pps->min_cb_addr_zs || !pps->min_tb_addr_zs) {

  1242.         ret = AVERROR(ENOMEM);

  1243.         goto err;

  1244.     }

  1245. 

  1246.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1247.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1248.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1249.         int tile_x = 0;

  1250.         int tile_y = 0;

  1251.         int val    = 0;

  1252. 

  1253.         for (i = 0; i < pps->num_tile_columns; i++) {

  1254.             if (tb_x < pps->col_bd[i + 1]) {

  1255.                 tile_x = i;

  1256.                 break;

  1257.             }

  1258.         }

  1259. 

  1260.         for (i = 0; i < pps->num_tile_rows; i++) {

  1261.             if (tb_y < pps->row_bd[i + 1]) {

  1262.                 tile_y = i;

  1263.                 break;

  1264.             }

  1265.         }

  1266. 

  1267.         for (i = 0; i < tile_x; i++)

  1268.             val += pps->row_height[tile_y] * pps->column_width[i];

  1269.         for (i = 0; i < tile_y; i++)

  1270.             val += sps->ctb_width * pps->row_height[i];

  1271. 

  1272.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1273.                tb_x - pps->col_bd[tile_x];

  1274. 

  1275.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1276.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1277.     }

  1278. 

  1279.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1280.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1281.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1282.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1283.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1284. 

  1285.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1286.     if (!pps->tile_pos_rs) {

  1287.         ret = AVERROR(ENOMEM);

  1288.         goto err;

  1289.     }

  1290. 

  1291.     for (j = 0; j < pps->num_tile_rows; j++)

  1292.         for (i = 0; i < pps->num_tile_columns; i++)

  1293.             pps->tile_pos_rs[j * pps->num_tile_columns + i] = pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1294. 

  1295.     for (y = 0; y < sps->min_cb_height; y++) {

  1296.         for (x = 0; x < sps->min_cb_width; x++) {

  1297.             int tb_x        = x >> sps->log2_diff_max_min_coding_block_size;

  1298.             int tb_y        = y >> sps->log2_diff_max_min_coding_block_size;

  1299.             int ctb_addr_rs = sps->ctb_width * tb_y + tb_x;

  1300.             int val         = pps->ctb_addr_rs_to_ts[ctb_addr_rs] <<

  1301.                               (sps->log2_diff_max_min_coding_block_size * 2);

  1302.             for (i = 0; i < sps->log2_diff_max_min_coding_block_size; i++) {

  1303.                 int m = 1 << i;

  1304.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1305.             }

  1306.             pps->min_cb_addr_zs[y * sps->min_cb_width + x] = val;

  1307.         }

  1308.     }

  1309. 

  1310.     log2_diff_ctb_min_tb_size = sps->log2_ctb_size - sps->log2_min_tb_size;

  1311.     for (y = 0; y < sps->min_tb_height; y++) {

  1312.         for (x = 0; x < sps->min_tb_width; x++) {

  1313.             int tb_x        = x >> log2_diff_ctb_min_tb_size;

  1314.             int tb_y        = y >> log2_diff_ctb_min_tb_size;

  1315.             int ctb_addr_rs = sps->ctb_width * tb_y + tb_x;

  1316.             int val         = pps->ctb_addr_rs_to_ts[ctb_addr_rs] <<

  1317.                               (log2_diff_ctb_min_tb_size * 2);

  1318.             for (i = 0; i < log2_diff_ctb_min_tb_size; i++) {

  1319.                 int m = 1 << i;

  1320.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1321.             }

  1322.             pps->min_tb_addr_zs[y * sps->min_tb_width + x] = val;

  1323.         }

  1324.     }

  1325. 

  1326.     av_buffer_unref(&s->pps_list[pps_id]);

  1327.     s->pps_list[pps_id] = pps_buf;

  1328. 

  1329.     return 0;

  1330. 

  1331. err:

  1332.     av_buffer_unref(&pps_buf);

  1333.     return ret;

  1334. }