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FFmpeg/libavcodec/hevc_ps.c

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  1. /*

  2.  * HEVC Parameter Set decoding

  3.  *

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

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

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

  7.  * Copyright (C) 2013 Vittorio Giovara

  8.  *

  9.  * This file is part of Libav.

  10.  *

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

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

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

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

  15.  *

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

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

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

  19.  * Lesser General Public License for more details.

  20.  *

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

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

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

  24.  */

  25. 

  26. #include "libavutil/imgutils.h"

  27. 

  28. #include "golomb.h"

  29. #include "hevc.h"

  30. 

  31. static const uint8_t default_scaling_list_intra[] = {

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

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

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

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

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

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

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

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

  40. };

  41. 

  42. static const uint8_t default_scaling_list_inter[] = {

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

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

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

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

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

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

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

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

  51. };

  52. 

  53. static const AVRational vui_sar[] = {

  54.     {  0,   1 },

  55.     {  1,   1 },

  56.     { 12,  11 },

  57.     { 10,  11 },

  58.     { 16,  11 },

  59.     { 40,  33 },

  60.     { 24,  11 },

  61.     { 20,  11 },

  62.     { 32,  11 },

  63.     { 80,  33 },

  64.     { 18,  11 },

  65.     { 15,  11 },

  66.     { 64,  33 },

  67.     { 160, 99 },

  68.     {  4,   3 },

  69.     {  3,   2 },

  70.     {  2,   1 },

  71. };

  72. 

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

  74. {

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

  76.         s->pps = NULL;

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

  78. }

  79. 

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

  81. {

  82.     int i;

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

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

  85.             s->sps = NULL;

  86. 

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

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

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

  90.                 remove_pps(s, i);

  91.     }

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

  93. }

  94. 

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

  96. {

  97.     int i;

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

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

  100.             s->vps = NULL;

  101. 

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

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

  104.                 remove_sps(s, i);

  105.     }

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

  107. }

  108. 

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

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

  111. {

  112.     uint8_t rps_predict = 0;

  113.     int delta_poc;

  114.     int k0 = 0;

  115.     int k1 = 0;

  116.     int k  = 0;

  117.     int i;

  118. 

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

  120.         rps_predict = get_bits1(gb);

  121. 

  122.     if (rps_predict) {

  123.         const ShortTermRPS *rps_ridx;

  124.         int delta_rps, abs_delta_rps;

  125.         uint8_t use_delta_flag = 0;

  126.         uint8_t delta_rps_sign;

  127. 

  128.         if (is_slice_header) {

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

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

  131.                 av_log(avctx, AV_LOG_ERROR,

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

  133.                        delta_idx, sps->nb_st_rps);

  134.                 return AVERROR_INVALIDDATA;

  135.             }

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

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

  138.         } else

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

  140. 

  141.         delta_rps_sign = get_bits1(gb);

  142.         abs_delta_rps  = get_ue_golomb_long(gb) + 1;

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

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

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

  146. 

  147.             if (!used)

  148.                 use_delta_flag = get_bits1(gb);

  149. 

  150.             if (used || use_delta_flag) {

  151.                 if (i < rps_ridx->num_delta_pocs)

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

  153.                 else

  154.                     delta_poc = delta_rps;

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

  156.                 if (delta_poc < 0)

  157.                     k0++;

  158.                 else

  159.                     k1++;

  160.                 k++;

  161.             }

  162.         }

  163. 

  164.         rps->num_delta_pocs    = k;

  165.         rps->num_negative_pics = k0;

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

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

  168.             int used, tmp;

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

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

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

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

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

  174.                     if (delta_poc < tmp) {

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

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

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

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

  179.                     }

  180.                 }

  181.             }

  182.         }

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

  184.             int used;

  185.             k = rps->num_negative_pics - 1;

  186.             // flip the negative values to largest first

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

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

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

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

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

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

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

  194.                 k--;

  195.             }

  196.         }

  197.     } else {

  198.         unsigned int prev, nb_positive_pics;

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

  200.         nb_positive_pics       = get_ue_golomb_long(gb);

  201. 

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

  203.             nb_positive_pics >= MAX_REFS) {

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

  205.             return AVERROR_INVALIDDATA;

  206.         }

  207. 

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

  209.         if (rps->num_delta_pocs) {

  210.             prev = 0;

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

  212.                 delta_poc = get_ue_golomb_long(gb) + 1;

  213.                 prev -= delta_poc;

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

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

  216.             }

  217.             prev = 0;

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

  219.                 delta_poc = get_ue_golomb_long(gb) + 1;

  220.                 prev += delta_poc;

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

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

  223.             }

  224.         }

  225.     }

  226.     return 0;

  227. }

  228. 

  229. 

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

  231.                                       PTLCommon *ptl)

  232. {

  233.     int i;

  234. 

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

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

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

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

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

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

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

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

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

  244.     else

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

  246. 

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

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

  249. 

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

  251.             ptl->profile_idc = i;

  252.     }

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

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

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

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

  257. 

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

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

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

  261. }

  262. 

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

  264.                       PTL *ptl, int max_num_sub_layers)

  265. {

  266.     int i;

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

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

  269. 

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

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

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

  273.     }

  274.     if (max_num_sub_layers - 1 > 0)

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

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

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

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

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

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

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

  282.     }

  283. }

  284. 

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

  286.                                 int subpic_params_present)

  287. {

  288.     int i;

  289. 

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

  291.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  292.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  293. 

  294.         if (subpic_params_present) {

  295.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  296.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  297.         }

  298.         skip_bits1(gb); // cbr_flag

  299.     }

  300. }

  301. 

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

  303.                        int max_sublayers)

  304. {

  305.     int nal_params_present = 0, vcl_params_present = 0;

  306.     int subpic_params_present = 0;

  307.     int i;

  308. 

  309.     if (common_inf_present) {

  310.         nal_params_present = get_bits1(gb);

  311.         vcl_params_present = get_bits1(gb);

  312. 

  313.         if (nal_params_present || vcl_params_present) {

  314.             subpic_params_present = get_bits1(gb);

  315. 

  316.             if (subpic_params_present) {

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

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

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

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

  321.             }

  322. 

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

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

  325. 

  326.             if (subpic_params_present)

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

  328. 

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

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

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

  332.         }

  333.     }

  334. 

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

  336.         int low_delay = 0;

  337.         unsigned int nb_cpb = 1;

  338.         int fixed_rate = get_bits1(gb);

  339. 

  340.         if (!fixed_rate)

  341.             fixed_rate = get_bits1(gb);

  342. 

  343.         if (fixed_rate)

  344.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  345.         else

  346.             low_delay = get_bits1(gb);

  347. 

  348.         if (!low_delay)

  349.             nb_cpb = get_ue_golomb_long(gb) + 1;

  350. 

  351.         if (nal_params_present)

  352.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  353.         if (vcl_params_present)

  354.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  355.     }

  356. }

  357. 

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

  359.                            HEVCParamSets *ps)

  360. {

  361.     int i,j;

  362.     int vps_id = 0;

  363.     HEVCVPS *vps;

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

  365. 

  366.     if (!vps_buf)

  367.         return AVERROR(ENOMEM);

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

  369. 

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

  371. 

  372.     vps_id = get_bits(gb, 4);

  373.     if (vps_id >= MAX_VPS_COUNT) {

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

  375.         goto err;

  376.     }

  377. 

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

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

  380.         goto err;

  381.     }

  382. 

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

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

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

  386. 

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

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

  389.         goto err;

  390.     }

  391. 

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

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

  394.                vps->vps_max_sub_layers);

  395.         goto err;

  396.     }

  397. 

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

  399. 

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

  401. 

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

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

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

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

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

  407. 

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

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

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

  411.             goto err;

  412.         }

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

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

  415.                    vps->vps_num_reorder_pics[i]);

  416.             if (avctx->err_recognition & AV_EF_EXPLODE)

  417.                 goto err;

  418.         }

  419.     }

  420. 

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

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

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

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

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

  426. 

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

  428.     if (vps->vps_timing_info_present_flag) {

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

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

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

  432.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  436.             int common_inf_present = 1;

  437. 

  438.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  439.             if (i)

  440.                 common_inf_present = get_bits1(gb);

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

  442.         }

  443.     }

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

  445. 

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

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

  448.         av_buffer_unref(&vps_buf);

  449.     } else {

  450.         remove_vps(ps, vps_id);

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

  452.     }

  453. 

  454.     return 0;

  455. 

  456. err:

  457.     av_buffer_unref(&vps_buf);

  458.     return AVERROR_INVALIDDATA;

  459. }

  460. 

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

  462.                        int apply_defdispwin, HEVCSPS *sps)

  463. {

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

  465.     int sar_present;

  466. 

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

  468. 

  469.     sar_present = get_bits1(gb);

  470.     if (sar_present) {

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

  472.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  474.         else if (sar_idx == 255) {

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

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

  477.         } else

  478.             av_log(avctx, AV_LOG_WARNING,

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

  480.     }

  481. 

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

  483.     if (vui->overscan_info_present_flag)

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

  485. 

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

  487.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  492.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  493.         if (vui->colour_description_present_flag) {

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

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

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

  497. 

  498.             // Set invalid values to "unspecified"

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

  500.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  502.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  504.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

  505.         }

  506.     }

  507. 

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

  509.     if (vui->chroma_loc_info_present_flag) {

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

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

  512.     }

  513. 

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

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

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

  517. 

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

  519.     if (vui->default_display_window_flag) {

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

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

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

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

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

  525. 

  526.         if (apply_defdispwin &&

  527.             avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {

  528.             av_log(avctx, AV_LOG_DEBUG,

  529.                    "discarding vui default display window, "

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

  531.                    vui->def_disp_win.left_offset,

  532.                    vui->def_disp_win.right_offset,

  533.                    vui->def_disp_win.top_offset,

  534.                    vui->def_disp_win.bottom_offset);

  535. 

  536.             vui->def_disp_win.left_offset   =

  537.             vui->def_disp_win.right_offset  =

  538.             vui->def_disp_win.top_offset    =

  539.             vui->def_disp_win.bottom_offset = 0;

  540.         }

  541.     }

  542. 

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

  544.     if (vui->vui_timing_info_present_flag) {

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

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

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

  548.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  551.         if (vui->vui_hrd_parameters_present_flag)

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

  553.     }

  554. 

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

  556.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  565.     }

  566. }

  567. 

  568. static void set_default_scaling_list_data(ScalingList *sl)

  569. {

  570.     int matrixId;

  571. 

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

  573.         // 4x4 default is 16

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

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

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

  577.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  592. }

  593. 

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

  595. {

  596.     uint8_t scaling_list_pred_mode_flag[4][6];

  597.     int32_t scaling_list_dc_coef[2][6];

  598.     int size_id, matrix_id, i, pos;

  599. 

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

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

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

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

  604.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  607.                 if (delta) {

  608.                     // Copy from previous array.

  609.                     if (matrix_id < delta) {

  610.                         av_log(avctx, AV_LOG_ERROR,

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

  612.                         return AVERROR_INVALIDDATA;

  613.                     }

  614. 

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

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

  617.                            size_id > 0 ? 64 : 16);

  618.                     if (size_id > 1)

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

  620.                 }

  621.             } else {

  622.                 int next_coef, coef_num;

  623.                 int32_t scaling_list_delta_coef;

  624. 

  625.                 next_coef = 8;

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

  627.                 if (size_id > 1) {

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

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

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

  631.                 }

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

  633.                     if (size_id == 0)

  634.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  635.                                   ff_hevc_diag_scan4x4_x[i];

  636.                     else

  637.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  638.                                   ff_hevc_diag_scan8x8_x[i];

  639. 

  640.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  643.                 }

  644.             }

  645.         }

  646. 

  647.     return 0;

  648. }

  649. 

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

  651. {

  652.     const AVPixFmtDescriptor *desc;

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

  654.         switch (sps->bit_depth) {

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

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

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

  658.         default:

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

  660.                    sps->bit_depth);

  661.             return AVERROR_PATCHWELCOME;

  662.         }

  663.     } else {

  664.         av_log(avctx, AV_LOG_ERROR,

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

  666.         return AVERROR_PATCHWELCOME;

  667.     }

  668. 

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

  670.     if (!desc)

  671.         return AVERROR(EINVAL);

  672. 

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

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

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

  676. 

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

  678. 

  679.     return 0;

  680. }

  681. 

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

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

  684. {

  685.     int ret = 0;

  686.     int log2_diff_max_min_transform_block_size;

  687.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  688.     int i;

  689. 

  690.     // Coded parameters

  691. 

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

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

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

  695.         ret = AVERROR_INVALIDDATA;

  696.         goto err;

  697.     }

  698. 

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

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

  701.                sps->vps_id);

  702.         ret = AVERROR_INVALIDDATA;

  703.         goto err;

  704.     }

  705. 

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

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

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

  709.                sps->max_sub_layers);

  710.         ret = AVERROR_INVALIDDATA;

  711.         goto err;

  712.     }

  713. 

  714.     skip_bits1(gb); // temporal_id_nesting_flag

  715. 

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

  717. 

  718.     *sps_id = get_ue_golomb_long(gb);

  719.     if (*sps_id >= MAX_SPS_COUNT) {

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

  721.         ret = AVERROR_INVALIDDATA;

  722.         goto err;

  723.     }

  724. 

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

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

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

  728.                                       sps->chroma_format_idc);

  729.         ret = AVERROR_PATCHWELCOME;

  730.         goto err;

  731.     }

  732. 

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

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

  735. 

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

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

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

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

  740.         goto err;

  741. 

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

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

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

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

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

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

  748. 

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

  750.             av_log(avctx, AV_LOG_DEBUG,

  751.                    "discarding sps conformance window, "

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

  753.                    sps->pic_conf_win.left_offset,

  754.                    sps->pic_conf_win.right_offset,

  755.                    sps->pic_conf_win.top_offset,

  756.                    sps->pic_conf_win.bottom_offset);

  757. 

  758.             sps->pic_conf_win.left_offset   =

  759.             sps->pic_conf_win.right_offset  =

  760.             sps->pic_conf_win.top_offset    =

  761.             sps->pic_conf_win.bottom_offset = 0;

  762.         }

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

  764.     }

  765. 

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

  767.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  769.         av_log(avctx, AV_LOG_ERROR,

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

  771.                "this is unsupported.\n",

  772.                sps->bit_depth, bit_depth_chroma);

  773.         ret = AVERROR_INVALIDDATA;

  774.         goto err;

  775.     }

  776. 

  777. 

  778.     ret = map_pixel_format(avctx, sps);

  779.     if (ret < 0)

  780.         goto err;

  781. 

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

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

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

  785.                sps->log2_max_poc_lsb - 4);

  786.         ret = AVERROR_INVALIDDATA;

  787.         goto err;

  788.     }

  789. 

  790.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  799.             ret = AVERROR_INVALIDDATA;

  800.             goto err;

  801.         }

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

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

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

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

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

  807.                 ret = AVERROR_INVALIDDATA;

  808.                 goto err;

  809.             }

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

  811.         }

  812.     }

  813. 

  814.     if (!sublayer_ordering_info) {

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

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

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

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

  819.         }

  820.     }

  821. 

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

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

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

  825.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  826.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  827.                                                sps->log2_min_tb_size;

  828. 

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

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

  831.         ret = AVERROR_INVALIDDATA;

  832.         goto err;

  833.     }

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

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

  836. 

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

  838.     if (sps->scaling_list_enable_flag) {

  839.         set_default_scaling_list_data(&sps->scaling_list);

  840. 

  841.         if (get_bits1(gb)) {

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

  843.             if (ret < 0)

  844.                 goto err;

  845.         }

  846.     }

  847. 

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

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

  850. 

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

  852.     if (sps->pcm_enabled_flag) {

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

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

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

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

  857.                                         get_ue_golomb_long(gb);

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

  859.             av_log(avctx, AV_LOG_ERROR,

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

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

  862.             ret = AVERROR_INVALIDDATA;

  863.             goto err;

  864.         }

  865. 

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

  867.     }

  868. 

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

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

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

  872.                sps->nb_st_rps);

  873.         ret = AVERROR_INVALIDDATA;

  874.         goto err;

  875.     }

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

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

  878.                                                  sps, 0)) < 0)

  879.             goto err;

  880.     }

  881. 

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

  883.     if (sps->long_term_ref_pics_present_flag) {

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

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

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

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

  888.         }

  889.     }

  890. 

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

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

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

  894.     vui_present = get_bits1(gb);

  895.     if (vui_present)

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

  897.     skip_bits1(gb); // sps_extension_flag

  898. 

  899.     if (apply_defdispwin) {

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

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

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

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

  904.     }

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

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

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

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

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

  910.                sps->output_window.left_offset);

  911.     }

  912.     sps->output_width  = sps->width -

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

  914.     sps->output_height = sps->height -

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

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

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

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

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

  920.             ret = AVERROR_INVALIDDATA;

  921.             goto err;

  922.         }

  923.         av_log(avctx, AV_LOG_WARNING,

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

  925.         sps->output_window.left_offset   =

  926.         sps->output_window.right_offset  =

  927.         sps->output_window.top_offset    =

  928.         sps->output_window.bottom_offset = 0;

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

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

  931.     }

  932. 

  933.     // Inferred parameters

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

  935.                          sps->log2_diff_max_min_coding_block_size;

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

  937. 

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

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

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

  941. 

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

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

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

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

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

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

  948. 

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

  950. 

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

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

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

  954.         goto err;

  955.     }

  956. 

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

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

  959.         goto err;

  960.     }

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

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

  963.                sps->max_transform_hierarchy_depth_inter);

  964.         goto err;

  965.     }

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

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

  968.                sps->max_transform_hierarchy_depth_intra);

  969.         goto err;

  970.     }

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

  972.         av_log(avctx, AV_LOG_ERROR,

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

  974.                sps->log2_max_trafo_size);

  975.         goto err;

  976.     }

  977. 

  978.     return 0;

  979. 

  980. err:

  981.     return ret < 0 ? ret : AVERROR_INVALIDDATA;

  982. }

  983. 

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

  985.                            HEVCParamSets *ps, int apply_defdispwin)

  986. {

  987.     HEVCSPS *sps;

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

  989.     unsigned int sps_id;

  990.     int ret;

  991. 

  992.     if (!sps_buf)

  993.         return AVERROR(ENOMEM);

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

  995. 

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

  997. 

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

  999.                             apply_defdispwin,

  1000.                             ps->vps_list, avctx);

  1001.     if (ret < 0) {

  1002.         av_buffer_unref(&sps_buf);

  1003.         return ret;

  1004.     }

  1005. 

  1006.     if (avctx->debug & FF_DEBUG_BITSTREAM) {

  1007.         av_log(avctx, AV_LOG_DEBUG,

  1008.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1009.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1010.                sps_id, sps->width, sps->height,

  1011.                sps->output_width, sps->output_height,

  1012.                av_get_pix_fmt_name(sps->pix_fmt));

  1013.     }

  1014. 

  1015.     /* check if this is a repeat of an already parsed SPS, then keep the

  1016.      * original one.

  1017.      * otherwise drop all PPSes that depend on it */

  1018.     if (ps->sps_list[sps_id] &&

  1019.         !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1020.         av_buffer_unref(&sps_buf);

  1021.     } else {

  1022.         remove_sps(ps, sps_id);

  1023.         ps->sps_list[sps_id] = sps_buf;

  1024.     }

  1025. 

  1026.     return 0;

  1027. }

  1028. 

  1029. static void hevc_pps_free(void *opaque, uint8_t *data)

  1030. {

  1031.     HEVCPPS *pps = (HEVCPPS*)data;

  1032. 

  1033.     av_freep(&pps->column_width);

  1034.     av_freep(&pps->row_height);

  1035.     av_freep(&pps->col_bd);

  1036.     av_freep(&pps->row_bd);

  1037.     av_freep(&pps->col_idxX);

  1038.     av_freep(&pps->ctb_addr_rs_to_ts);

  1039.     av_freep(&pps->ctb_addr_ts_to_rs);

  1040.     av_freep(&pps->tile_pos_rs);

  1041.     av_freep(&pps->tile_id);

  1042.     av_freep(&pps->min_tb_addr_zs);

  1043. 

  1044.     av_freep(&pps);

  1045. }

  1046. 

  1047. static inline int setup_pps(AVCodecContext *avctx, GetBitContext *gb,

  1048.                             HEVCPPS *pps, HEVCSPS *sps)

  1049. {

  1050.     int log2_diff;

  1051.     int pic_area_in_ctbs, pic_area_in_min_tbs;

  1052.     int i, j, x, y, ctb_addr_rs, tile_id;

  1053. 

  1054.     // Inferred parameters

  1055.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1056.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1057.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1058.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX)

  1059.         return AVERROR(ENOMEM);

  1060. 

  1061.     if (pps->uniform_spacing_flag) {

  1062.         if (!pps->column_width) {

  1063.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1064.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1065.         }

  1066.         if (!pps->column_width || !pps->row_height)

  1067.             return AVERROR(ENOMEM);

  1068. 

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

  1070.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1071.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1072.         }

  1073. 

  1074.         for (i = 0; i < pps->num_tile_rows; i++) {

  1075.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1076.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1077.         }

  1078.     }

  1079. 

  1080.     pps->col_bd[0] = 0;

  1081.     for (i = 0; i < pps->num_tile_columns; i++)

  1082.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1083. 

  1084.     pps->row_bd[0] = 0;

  1085.     for (i = 0; i < pps->num_tile_rows; i++)

  1086.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1087. 

  1088.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1089.         if (i > pps->col_bd[j])

  1090.             j++;

  1091.         pps->col_idxX[i] = j;

  1092.     }

  1093. 

  1094.     /**

  1095.      * 6.5

  1096.      */

  1097.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1098.     pic_area_in_min_tbs  = sps->min_tb_width * sps->min_tb_height;

  1099. 

  1100.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1101.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1102.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1103.     pps->min_tb_addr_zs    = av_malloc_array(pic_area_in_min_tbs, sizeof(*pps->min_tb_addr_zs));

  1104.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1105.         !pps->tile_id || !pps->min_tb_addr_zs) {

  1106.         return AVERROR(ENOMEM);

  1107.     }

  1108. 

  1109.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1110.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1111.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1112.         int tile_x = 0;

  1113.         int tile_y = 0;

  1114.         int val    = 0;

  1115. 

  1116.         for (i = 0; i < pps->num_tile_columns; i++) {

  1117.             if (tb_x < pps->col_bd[i + 1]) {

  1118.                 tile_x = i;

  1119.                 break;

  1120.             }

  1121.         }

  1122. 

  1123.         for (i = 0; i < pps->num_tile_rows; i++) {

  1124.             if (tb_y < pps->row_bd[i + 1]) {

  1125.                 tile_y = i;

  1126.                 break;

  1127.             }

  1128.         }

  1129. 

  1130.         for (i = 0; i < tile_x; i++)

  1131.             val += pps->row_height[tile_y] * pps->column_width[i];

  1132.         for (i = 0; i < tile_y; i++)

  1133.             val += sps->ctb_width * pps->row_height[i];

  1134. 

  1135.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1136.                tb_x - pps->col_bd[tile_x];

  1137. 

  1138.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1139.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1140.     }

  1141. 

  1142.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1143.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1144.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1145.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1146.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1147. 

  1148.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1149.     if (!pps->tile_pos_rs)

  1150.         return AVERROR(ENOMEM);

  1151. 

  1152.     for (j = 0; j < pps->num_tile_rows; j++)

  1153.         for (i = 0; i < pps->num_tile_columns; i++)

  1154.             pps->tile_pos_rs[j * pps->num_tile_columns + i] =

  1155.                 pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1156. 

  1157.     log2_diff = sps->log2_ctb_size - sps->log2_min_tb_size;

  1158.     for (y = 0; y < sps->min_tb_height; y++) {

  1159.         for (x = 0; x < sps->min_tb_width; x++) {

  1160.             int tb_x = x >> log2_diff;

  1161.             int tb_y = y >> log2_diff;

  1162.             int rs   = sps->ctb_width * tb_y + tb_x;

  1163.             int val  = pps->ctb_addr_rs_to_ts[rs] << (log2_diff * 2);

  1164.             for (i = 0; i < log2_diff; i++) {

  1165.                 int m = 1 << i;

  1166.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1167.             }

  1168.             pps->min_tb_addr_zs[y * sps->min_tb_width + x] = val;

  1169.         }

  1170.     }

  1171. 

  1172.     return 0;

  1173. }

  1174. 

  1175. int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,

  1176.                            HEVCParamSets *ps)

  1177. {

  1178.     HEVCSPS      *sps = NULL;

  1179.     int i, ret = 0;

  1180.     unsigned int pps_id = 0;

  1181. 

  1182.     AVBufferRef *pps_buf;

  1183.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1184. 

  1185.     if (!pps)

  1186.         return AVERROR(ENOMEM);

  1187. 

  1188.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1189.                                hevc_pps_free, NULL, 0);

  1190.     if (!pps_buf) {

  1191.         av_freep(&pps);

  1192.         return AVERROR(ENOMEM);

  1193.     }

  1194. 

  1195.     av_log(avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1196. 

  1197.     // Default values

  1198.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1199.     pps->num_tile_columns                      = 1;

  1200.     pps->num_tile_rows                         = 1;

  1201.     pps->uniform_spacing_flag                  = 1;

  1202.     pps->disable_dbf                           = 0;

  1203.     pps->beta_offset                           = 0;

  1204.     pps->tc_offset                             = 0;

  1205. 

  1206.     // Coded parameters

  1207.     pps_id = get_ue_golomb_long(gb);

  1208.     if (pps_id >= MAX_PPS_COUNT) {

  1209.         av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1210.         ret = AVERROR_INVALIDDATA;

  1211.         goto err;

  1212.     }

  1213.     pps->sps_id = get_ue_golomb_long(gb);

  1214.     if (pps->sps_id >= MAX_SPS_COUNT) {

  1215.         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1216.         ret = AVERROR_INVALIDDATA;

  1217.         goto err;

  1218.     }

  1219.     if (!ps->sps_list[pps->sps_id]) {

  1220.         av_log(avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1221.         ret = AVERROR_INVALIDDATA;

  1222.         goto err;

  1223.     }

  1224.     sps = (HEVCSPS *)ps->sps_list[pps->sps_id]->data;

  1225. 

  1226.     pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

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

  1228.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1229. 

  1230.     pps->sign_data_hiding_flag = get_bits1(gb);

  1231. 

  1232.     pps->cabac_init_present_flag = get_bits1(gb);

  1233. 

  1234.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1235.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1236. 

  1237.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1238. 

  1239.     pps->constrained_intra_pred_flag = get_bits1(gb);

  1240.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1241. 

  1242.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1243.     pps->diff_cu_qp_delta_depth   = 0;

  1244.     if (pps->cu_qp_delta_enabled_flag)

  1245.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1246. 

  1247.     pps->cb_qp_offset = get_se_golomb(gb);

  1248.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1249.         av_log(avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1250.                pps->cb_qp_offset);

  1251.         ret = AVERROR_INVALIDDATA;

  1252.         goto err;

  1253.     }

  1254.     pps->cr_qp_offset = get_se_golomb(gb);

  1255.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1256.         av_log(avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1257.                pps->cr_qp_offset);

  1258.         ret = AVERROR_INVALIDDATA;

  1259.         goto err;

  1260.     }

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

  1262. 

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

  1264.     pps->weighted_bipred_flag = get_bits1(gb);

  1265. 

  1266.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1267.     pps->tiles_enabled_flag               = get_bits1(gb);

  1268.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1269. 

  1270.     if (pps->tiles_enabled_flag) {

  1271.         pps->num_tile_columns = get_ue_golomb_long(gb) + 1;

  1272.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

  1273.         if (pps->num_tile_columns == 0 ||

  1274.             pps->num_tile_columns >= sps->width) {

  1275.             av_log(avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1276.                    pps->num_tile_columns - 1);

  1277.             ret = AVERROR_INVALIDDATA;

  1278.             goto err;

  1279.         }

  1280.         if (pps->num_tile_rows == 0 ||

  1281.             pps->num_tile_rows >= sps->height) {

  1282.             av_log(avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1283.                    pps->num_tile_rows - 1);

  1284.             ret = AVERROR_INVALIDDATA;

  1285.             goto err;

  1286.         }

  1287. 

  1288.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1289.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1290.         if (!pps->column_width || !pps->row_height) {

  1291.             ret = AVERROR(ENOMEM);

  1292.             goto err;

  1293.         }

  1294. 

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

  1296.         if (!pps->uniform_spacing_flag) {

  1297.             uint64_t sum = 0;

  1298.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1299.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1300.                 sum                 += pps->column_width[i];

  1301.             }

  1302.             if (sum >= sps->ctb_width) {

  1303.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1304.                 ret = AVERROR_INVALIDDATA;

  1305.                 goto err;

  1306.             }

  1307.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1308. 

  1309.             sum = 0;

  1310.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1311.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1312.                 sum               += pps->row_height[i];

  1313.             }

  1314.             if (sum >= sps->ctb_height) {

  1315.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1316.                 ret = AVERROR_INVALIDDATA;

  1317.                 goto err;

  1318.             }

  1319.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1320.         }

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

  1322.     }

  1323. 

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

  1325. 

  1326.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1327.     if (pps->deblocking_filter_control_present_flag) {

  1328.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1329.         pps->disable_dbf                             = get_bits1(gb);

  1330.         if (!pps->disable_dbf) {

  1331.             pps->beta_offset = get_se_golomb(gb) * 2;

  1332.             pps->tc_offset = get_se_golomb(gb) * 2;

  1333.             if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

  1334.                 av_log(avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1335.                        pps->beta_offset/2);

  1336.                 ret = AVERROR_INVALIDDATA;

  1337.                 goto err;

  1338.             }

  1339.             if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

  1340.                 av_log(avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1341.                        pps->tc_offset/2);

  1342.                 ret = AVERROR_INVALIDDATA;

  1343.                 goto err;

  1344.             }

  1345.         }

  1346.     }

  1347. 

  1348.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1349.     if (pps->scaling_list_data_present_flag) {

  1350.         set_default_scaling_list_data(&pps->scaling_list);

  1351.         ret = scaling_list_data(gb, avctx, &pps->scaling_list);

  1352.         if (ret < 0)

  1353.             goto err;

  1354.     }

  1355.     pps->lists_modification_present_flag = get_bits1(gb);

  1356.     pps->log2_parallel_merge_level       = get_ue_golomb_long(gb) + 2;

  1357.     if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {

  1358.         av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1359.                pps->log2_parallel_merge_level - 2);

  1360.         ret = AVERROR_INVALIDDATA;

  1361.         goto err;

  1362.     }

  1363. 

  1364.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1365.     skip_bits1(gb);     // pps_extension_flag

  1366. 

  1367.     ret = setup_pps(avctx, gb, pps, sps);

  1368.     if (ret < 0)

  1369.         goto err;

  1370. 

  1371.     remove_pps(ps, pps_id);

  1372.     ps->pps_list[pps_id] = pps_buf;

  1373. 

  1374.     return 0;

  1375. 

  1376. err:

  1377.     av_buffer_unref(&pps_buf);

  1378.     return ret;

  1379. }