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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.     ptl->progressive_source_flag    = get_bits1(gb);

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

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

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

  253. 

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

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

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

  257. }

  258. 

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

  260.                       PTL *ptl, int max_num_sub_layers)

  261. {

  262.     int i;

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

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

  265. 

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

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

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

  269.     }

  270.     if (max_num_sub_layers - 1 > 0)

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

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

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

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

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

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

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

  278.     }

  279. }

  280. 

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

  282.                                 int subpic_params_present)

  283. {

  284.     int i;

  285. 

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

  287.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  288.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  289. 

  290.         if (subpic_params_present) {

  291.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  292.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  293.         }

  294.         skip_bits1(gb); // cbr_flag

  295.     }

  296. }

  297. 

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

  299.                        int max_sublayers)

  300. {

  301.     int nal_params_present = 0, vcl_params_present = 0;

  302.     int subpic_params_present = 0;

  303.     int i;

  304. 

  305.     if (common_inf_present) {

  306.         nal_params_present = get_bits1(gb);

  307.         vcl_params_present = get_bits1(gb);

  308. 

  309.         if (nal_params_present || vcl_params_present) {

  310.             subpic_params_present = get_bits1(gb);

  311. 

  312.             if (subpic_params_present) {

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

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

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

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

  317.             }

  318. 

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

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

  321. 

  322.             if (subpic_params_present)

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

  324. 

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

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

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

  328.         }

  329.     }

  330. 

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

  332.         int low_delay = 0;

  333.         unsigned int nb_cpb = 1;

  334.         int fixed_rate = get_bits1(gb);

  335. 

  336.         if (!fixed_rate)

  337.             fixed_rate = get_bits1(gb);

  338. 

  339.         if (fixed_rate)

  340.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  341.         else

  342.             low_delay = get_bits1(gb);

  343. 

  344.         if (!low_delay)

  345.             nb_cpb = get_ue_golomb_long(gb) + 1;

  346. 

  347.         if (nal_params_present)

  348.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  349.         if (vcl_params_present)

  350.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  351.     }

  352. }

  353. 

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

  355.                            HEVCParamSets *ps)

  356. {

  357.     int i,j;

  358.     int vps_id = 0;

  359.     HEVCVPS *vps;

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

  361. 

  362.     if (!vps_buf)

  363.         return AVERROR(ENOMEM);

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

  365. 

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

  367. 

  368.     vps_id = get_bits(gb, 4);

  369.     if (vps_id >= MAX_VPS_COUNT) {

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

  371.         goto err;

  372.     }

  373. 

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

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

  376.         goto err;

  377.     }

  378. 

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

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

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

  382. 

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

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

  385.         goto err;

  386.     }

  387. 

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

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

  390.                vps->vps_max_sub_layers);

  391.         goto err;

  392.     }

  393. 

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

  395. 

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

  397. 

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

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

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

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

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

  403. 

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

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

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

  407.             goto err;

  408.         }

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

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

  411.                    vps->vps_num_reorder_pics[i]);

  412.             if (avctx->err_recognition & AV_EF_EXPLODE)

  413.                 goto err;

  414.         }

  415.     }

  416. 

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

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

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

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

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

  422. 

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

  424.     if (vps->vps_timing_info_present_flag) {

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

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

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

  428.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  432.             int common_inf_present = 1;

  433. 

  434.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  435.             if (i)

  436.                 common_inf_present = get_bits1(gb);

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

  438.         }

  439.     }

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

  441. 

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

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

  444.         av_buffer_unref(&vps_buf);

  445.     } else {

  446.         remove_vps(ps, vps_id);

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

  448.     }

  449. 

  450.     return 0;

  451. 

  452. err:

  453.     av_buffer_unref(&vps_buf);

  454.     return AVERROR_INVALIDDATA;

  455. }

  456. 

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

  458.                        int apply_defdispwin, HEVCSPS *sps)

  459. {

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

  461.     int sar_present;

  462. 

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

  464. 

  465.     sar_present = get_bits1(gb);

  466.     if (sar_present) {

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

  468.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  470.         else if (sar_idx == 255) {

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

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

  473.         } else

  474.             av_log(avctx, AV_LOG_WARNING,

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

  476.     }

  477. 

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

  479.     if (vui->overscan_info_present_flag)

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

  481. 

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

  483.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  488.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  489.         if (vui->colour_description_present_flag) {

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

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

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

  493. 

  494.             // Set invalid values to "unspecified"

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

  496.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  498.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  500.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

  501.         }

  502.     }

  503. 

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

  505.     if (vui->chroma_loc_info_present_flag) {

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

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

  508.     }

  509. 

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

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

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

  513. 

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

  515.     if (vui->default_display_window_flag) {

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

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

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

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

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

  521. 

  522.         if (apply_defdispwin &&

  523.             avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {

  524.             av_log(avctx, AV_LOG_DEBUG,

  525.                    "discarding vui default display window, "

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

  527.                    vui->def_disp_win.left_offset,

  528.                    vui->def_disp_win.right_offset,

  529.                    vui->def_disp_win.top_offset,

  530.                    vui->def_disp_win.bottom_offset);

  531. 

  532.             vui->def_disp_win.left_offset   =

  533.             vui->def_disp_win.right_offset  =

  534.             vui->def_disp_win.top_offset    =

  535.             vui->def_disp_win.bottom_offset = 0;

  536.         }

  537.     }

  538. 

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

  540.     if (vui->vui_timing_info_present_flag) {

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

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

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

  544.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  547.         if (vui->vui_hrd_parameters_present_flag)

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

  549.     }

  550. 

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

  552.     if (vui->bitstream_restriction_flag) {

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

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

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

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

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

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

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

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

  561.     }

  562. }

  563. 

  564. static void set_default_scaling_list_data(ScalingList *sl)

  565. {

  566.     int matrixId;

  567. 

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

  569.         // 4x4 default is 16

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

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

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

  573.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  588. }

  589. 

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

  591. {

  592.     uint8_t scaling_list_pred_mode_flag[4][6];

  593.     int32_t scaling_list_dc_coef[2][6];

  594.     int size_id, matrix_id, i, pos;

  595. 

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

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

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

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

  600.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  603.                 if (delta) {

  604.                     // Copy from previous array.

  605.                     if (matrix_id < delta) {

  606.                         av_log(avctx, AV_LOG_ERROR,

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

  608.                         return AVERROR_INVALIDDATA;

  609.                     }

  610. 

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

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

  613.                            size_id > 0 ? 64 : 16);

  614.                     if (size_id > 1)

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

  616.                 }

  617.             } else {

  618.                 int next_coef, coef_num;

  619.                 int32_t scaling_list_delta_coef;

  620. 

  621.                 next_coef = 8;

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

  623.                 if (size_id > 1) {

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

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

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

  627.                 }

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

  629.                     if (size_id == 0)

  630.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  631.                                   ff_hevc_diag_scan4x4_x[i];

  632.                     else

  633.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  634.                                   ff_hevc_diag_scan8x8_x[i];

  635. 

  636.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  639.                 }

  640.             }

  641.         }

  642. 

  643.     return 0;

  644. }

  645. 

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

  647. {

  648.     const AVPixFmtDescriptor *desc;

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

  650.         switch (sps->bit_depth) {

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

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

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

  654.         default:

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

  656.                    sps->bit_depth);

  657.             return AVERROR_PATCHWELCOME;

  658.         }

  659.     } else {

  660.         av_log(avctx, AV_LOG_ERROR,

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

  662.         return AVERROR_PATCHWELCOME;

  663.     }

  664. 

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

  666.     if (!desc)

  667.         return AVERROR(EINVAL);

  668. 

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

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

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

  672. 

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

  674. 

  675.     return 0;

  676. }

  677. 

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

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

  680. {

  681.     int ret = 0;

  682.     int log2_diff_max_min_transform_block_size;

  683.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  684.     int i;

  685. 

  686.     // Coded parameters

  687. 

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

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

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

  691.         ret = AVERROR_INVALIDDATA;

  692.         goto err;

  693.     }

  694. 

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

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

  697.                sps->vps_id);

  698.         ret = AVERROR_INVALIDDATA;

  699.         goto err;

  700.     }

  701. 

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

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

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

  705.                sps->max_sub_layers);

  706.         ret = AVERROR_INVALIDDATA;

  707.         goto err;

  708.     }

  709. 

  710.     skip_bits1(gb); // temporal_id_nesting_flag

  711. 

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

  713. 

  714.     *sps_id = get_ue_golomb_long(gb);

  715.     if (*sps_id >= MAX_SPS_COUNT) {

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

  717.         ret = AVERROR_INVALIDDATA;

  718.         goto err;

  719.     }

  720. 

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

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

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

  724.                                       sps->chroma_format_idc);

  725.         ret = AVERROR_PATCHWELCOME;

  726.         goto err;

  727.     }

  728. 

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

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

  731. 

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

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

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

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

  736.         goto err;

  737. 

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

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

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

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

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

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

  744. 

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

  746.             av_log(avctx, AV_LOG_DEBUG,

  747.                    "discarding sps conformance window, "

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

  749.                    sps->pic_conf_win.left_offset,

  750.                    sps->pic_conf_win.right_offset,

  751.                    sps->pic_conf_win.top_offset,

  752.                    sps->pic_conf_win.bottom_offset);

  753. 

  754.             sps->pic_conf_win.left_offset   =

  755.             sps->pic_conf_win.right_offset  =

  756.             sps->pic_conf_win.top_offset    =

  757.             sps->pic_conf_win.bottom_offset = 0;

  758.         }

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

  760.     }

  761. 

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

  763.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  765.         av_log(avctx, AV_LOG_ERROR,

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

  767.                "this is unsupported.\n",

  768.                sps->bit_depth, bit_depth_chroma);

  769.         ret = AVERROR_INVALIDDATA;

  770.         goto err;

  771.     }

  772. 

  773. 

  774.     ret = map_pixel_format(avctx, sps);

  775.     if (ret < 0)

  776.         goto err;

  777. 

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

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

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

  781.                sps->log2_max_poc_lsb - 4);

  782.         ret = AVERROR_INVALIDDATA;

  783.         goto err;

  784.     }

  785. 

  786.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  795.             ret = AVERROR_INVALIDDATA;

  796.             goto err;

  797.         }

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

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

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

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

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

  803.                 ret = AVERROR_INVALIDDATA;

  804.                 goto err;

  805.             }

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

  807.         }

  808.     }

  809. 

  810.     if (!sublayer_ordering_info) {

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

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

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

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

  815.         }

  816.     }

  817. 

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

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

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

  821.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  822.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  823.                                                sps->log2_min_tb_size;

  824. 

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

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

  827.         ret = AVERROR_INVALIDDATA;

  828.         goto err;

  829.     }

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

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

  832. 

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

  834.     if (sps->scaling_list_enable_flag) {

  835.         set_default_scaling_list_data(&sps->scaling_list);

  836. 

  837.         if (get_bits1(gb)) {

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

  839.             if (ret < 0)

  840.                 goto err;

  841.         }

  842.     }

  843. 

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

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

  846. 

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

  848.     if (sps->pcm_enabled_flag) {

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

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

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

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

  853.                                         get_ue_golomb_long(gb);

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

  855.             av_log(avctx, AV_LOG_ERROR,

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

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

  858.             ret = AVERROR_INVALIDDATA;

  859.             goto err;

  860.         }

  861. 

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

  863.     }

  864. 

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

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

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

  868.                sps->nb_st_rps);

  869.         ret = AVERROR_INVALIDDATA;

  870.         goto err;

  871.     }

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

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

  874.                                                  sps, 0)) < 0)

  875.             goto err;

  876.     }

  877. 

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

  879.     if (sps->long_term_ref_pics_present_flag) {

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

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

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

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

  884.         }

  885.     }

  886. 

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

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

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

  890.     vui_present = get_bits1(gb);

  891.     if (vui_present)

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

  893.     skip_bits1(gb); // sps_extension_flag

  894. 

  895.     if (apply_defdispwin) {

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

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

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

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

  900.     }

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

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

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

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

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

  906.                sps->output_window.left_offset);

  907.     }

  908.     sps->output_width  = sps->width -

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

  910.     sps->output_height = sps->height -

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

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

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

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

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

  916.             ret = AVERROR_INVALIDDATA;

  917.             goto err;

  918.         }

  919.         av_log(avctx, AV_LOG_WARNING,

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

  921.         sps->output_window.left_offset   =

  922.         sps->output_window.right_offset  =

  923.         sps->output_window.top_offset    =

  924.         sps->output_window.bottom_offset = 0;

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

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

  927.     }

  928. 

  929.     // Inferred parameters

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

  931.                          sps->log2_diff_max_min_coding_block_size;

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

  933. 

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

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

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

  937. 

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

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

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

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

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

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

  944. 

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

  946. 

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

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

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

  950.         goto err;

  951.     }

  952. 

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

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

  955.         goto err;

  956.     }

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

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

  959.                sps->max_transform_hierarchy_depth_inter);

  960.         goto err;

  961.     }

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

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

  964.                sps->max_transform_hierarchy_depth_intra);

  965.         goto err;

  966.     }

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

  968.         av_log(avctx, AV_LOG_ERROR,

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

  970.                sps->log2_max_trafo_size);

  971.         goto err;

  972.     }

  973. 

  974.     return 0;

  975. 

  976. err:

  977.     return ret < 0 ? ret : AVERROR_INVALIDDATA;

  978. }

  979. 

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

  981.                            HEVCParamSets *ps, int apply_defdispwin)

  982. {

  983.     HEVCSPS *sps;

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

  985.     unsigned int sps_id;

  986.     int ret;

  987. 

  988.     if (!sps_buf)

  989.         return AVERROR(ENOMEM);

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

  991. 

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

  993. 

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

  995.                             apply_defdispwin,

  996.                             ps->vps_list, avctx);

  997.     if (ret < 0) {

  998.         av_buffer_unref(&sps_buf);

  999.         return ret;

  1000.     }

  1001. 

  1002.     if (avctx->debug & FF_DEBUG_BITSTREAM) {

  1003.         av_log(avctx, AV_LOG_DEBUG,

  1004.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1005.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1006.                sps_id, sps->width, sps->height,

  1007.                sps->output_width, sps->output_height,

  1008.                av_get_pix_fmt_name(sps->pix_fmt));

  1009.     }

  1010. 

  1011.     /* check if this is a repeat of an already parsed SPS, then keep the

  1012.      * original one.

  1013.      * otherwise drop all PPSes that depend on it */

  1014.     if (ps->sps_list[sps_id] &&

  1015.         !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1016.         av_buffer_unref(&sps_buf);

  1017.     } else {

  1018.         remove_sps(ps, sps_id);

  1019.         ps->sps_list[sps_id] = sps_buf;

  1020.     }

  1021. 

  1022.     return 0;

  1023. }

  1024. 

  1025. static void hevc_pps_free(void *opaque, uint8_t *data)

  1026. {

  1027.     HEVCPPS *pps = (HEVCPPS*)data;

  1028. 

  1029.     av_freep(&pps->column_width);

  1030.     av_freep(&pps->row_height);

  1031.     av_freep(&pps->col_bd);

  1032.     av_freep(&pps->row_bd);

  1033.     av_freep(&pps->col_idxX);

  1034.     av_freep(&pps->ctb_addr_rs_to_ts);

  1035.     av_freep(&pps->ctb_addr_ts_to_rs);

  1036.     av_freep(&pps->tile_pos_rs);

  1037.     av_freep(&pps->tile_id);

  1038.     av_freep(&pps->min_tb_addr_zs);

  1039. 

  1040.     av_freep(&pps);

  1041. }

  1042. 

  1043. static inline int setup_pps(AVCodecContext *avctx, GetBitContext *gb,

  1044.                             HEVCPPS *pps, HEVCSPS *sps)

  1045. {

  1046.     int log2_diff;

  1047.     int pic_area_in_ctbs, pic_area_in_min_tbs;

  1048.     int i, j, x, y, ctb_addr_rs, tile_id;

  1049. 

  1050.     // Inferred parameters

  1051.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1052.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1053.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1054.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX)

  1055.         return AVERROR(ENOMEM);

  1056. 

  1057.     if (pps->uniform_spacing_flag) {

  1058.         if (!pps->column_width) {

  1059.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1060.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1061.         }

  1062.         if (!pps->column_width || !pps->row_height)

  1063.             return AVERROR(ENOMEM);

  1064. 

  1065.         for (i = 0; i < pps->num_tile_columns; i++) {

  1066.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1067.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1068.         }

  1069. 

  1070.         for (i = 0; i < pps->num_tile_rows; i++) {

  1071.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1072.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1073.         }

  1074.     }

  1075. 

  1076.     pps->col_bd[0] = 0;

  1077.     for (i = 0; i < pps->num_tile_columns; i++)

  1078.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1079. 

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

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

  1082.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1083. 

  1084.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1085.         if (i > pps->col_bd[j])

  1086.             j++;

  1087.         pps->col_idxX[i] = j;

  1088.     }

  1089. 

  1090.     /**

  1091.      * 6.5

  1092.      */

  1093.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1094.     pic_area_in_min_tbs  = sps->min_tb_width * sps->min_tb_height;

  1095. 

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

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

  1098.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1099.     pps->min_tb_addr_zs    = av_malloc_array(pic_area_in_min_tbs, sizeof(*pps->min_tb_addr_zs));

  1100.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1101.         !pps->tile_id || !pps->min_tb_addr_zs) {

  1102.         return AVERROR(ENOMEM);

  1103.     }

  1104. 

  1105.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1106.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1107.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1108.         int tile_x = 0;

  1109.         int tile_y = 0;

  1110.         int val    = 0;

  1111. 

  1112.         for (i = 0; i < pps->num_tile_columns; i++) {

  1113.             if (tb_x < pps->col_bd[i + 1]) {

  1114.                 tile_x = i;

  1115.                 break;

  1116.             }

  1117.         }

  1118. 

  1119.         for (i = 0; i < pps->num_tile_rows; i++) {

  1120.             if (tb_y < pps->row_bd[i + 1]) {

  1121.                 tile_y = i;

  1122.                 break;

  1123.             }

  1124.         }

  1125. 

  1126.         for (i = 0; i < tile_x; i++)

  1127.             val += pps->row_height[tile_y] * pps->column_width[i];

  1128.         for (i = 0; i < tile_y; i++)

  1129.             val += sps->ctb_width * pps->row_height[i];

  1130. 

  1131.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1132.                tb_x - pps->col_bd[tile_x];

  1133. 

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

  1135.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1136.     }

  1137. 

  1138.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1139.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1140.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1141.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1142.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1143. 

  1144.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1145.     if (!pps->tile_pos_rs)

  1146.         return AVERROR(ENOMEM);

  1147. 

  1148.     for (j = 0; j < pps->num_tile_rows; j++)

  1149.         for (i = 0; i < pps->num_tile_columns; i++)

  1150.             pps->tile_pos_rs[j * pps->num_tile_columns + i] =

  1151.                 pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1152. 

  1153.     log2_diff = sps->log2_ctb_size - sps->log2_min_tb_size;

  1154.     for (y = 0; y < sps->min_tb_height; y++) {

  1155.         for (x = 0; x < sps->min_tb_width; x++) {

  1156.             int tb_x = x >> log2_diff;

  1157.             int tb_y = y >> log2_diff;

  1158.             int rs   = sps->ctb_width * tb_y + tb_x;

  1159.             int val  = pps->ctb_addr_rs_to_ts[rs] << (log2_diff * 2);

  1160.             for (i = 0; i < log2_diff; i++) {

  1161.                 int m = 1 << i;

  1162.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1163.             }

  1164.             pps->min_tb_addr_zs[y * sps->min_tb_width + x] = val;

  1165.         }

  1166.     }

  1167. 

  1168.     return 0;

  1169. }

  1170. 

  1171. int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,

  1172.                            HEVCParamSets *ps)

  1173. {

  1174.     HEVCSPS      *sps = NULL;

  1175.     int i, ret = 0;

  1176.     unsigned int pps_id = 0;

  1177. 

  1178.     AVBufferRef *pps_buf;

  1179.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1180. 

  1181.     if (!pps)

  1182.         return AVERROR(ENOMEM);

  1183. 

  1184.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1185.                                hevc_pps_free, NULL, 0);

  1186.     if (!pps_buf) {

  1187.         av_freep(&pps);

  1188.         return AVERROR(ENOMEM);

  1189.     }

  1190. 

  1191.     av_log(avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1192. 

  1193.     // Default values

  1194.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1195.     pps->num_tile_columns                      = 1;

  1196.     pps->num_tile_rows                         = 1;

  1197.     pps->uniform_spacing_flag                  = 1;

  1198.     pps->disable_dbf                           = 0;

  1199.     pps->beta_offset                           = 0;

  1200.     pps->tc_offset                             = 0;

  1201. 

  1202.     // Coded parameters

  1203.     pps_id = get_ue_golomb_long(gb);

  1204.     if (pps_id >= MAX_PPS_COUNT) {

  1205.         av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1206.         ret = AVERROR_INVALIDDATA;

  1207.         goto err;

  1208.     }

  1209.     pps->sps_id = get_ue_golomb_long(gb);

  1210.     if (pps->sps_id >= MAX_SPS_COUNT) {

  1211.         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1212.         ret = AVERROR_INVALIDDATA;

  1213.         goto err;

  1214.     }

  1215.     if (!ps->sps_list[pps->sps_id]) {

  1216.         av_log(avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1217.         ret = AVERROR_INVALIDDATA;

  1218.         goto err;

  1219.     }

  1220.     sps = (HEVCSPS *)ps->sps_list[pps->sps_id]->data;

  1221. 

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

  1223.     pps->output_flag_present_flag              = get_bits1(gb);

  1224.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1225. 

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

  1227. 

  1228.     pps->cabac_init_present_flag = get_bits1(gb);

  1229. 

  1230.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1231.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1232. 

  1233.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1234. 

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

  1236.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1237. 

  1238.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1239.     pps->diff_cu_qp_delta_depth   = 0;

  1240.     if (pps->cu_qp_delta_enabled_flag)

  1241.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1242. 

  1243.     pps->cb_qp_offset = get_se_golomb(gb);

  1244.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1245.         av_log(avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1246.                pps->cb_qp_offset);

  1247.         ret = AVERROR_INVALIDDATA;

  1248.         goto err;

  1249.     }

  1250.     pps->cr_qp_offset = get_se_golomb(gb);

  1251.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1252.         av_log(avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1253.                pps->cr_qp_offset);

  1254.         ret = AVERROR_INVALIDDATA;

  1255.         goto err;

  1256.     }

  1257.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1258. 

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

  1260.     pps->weighted_bipred_flag = get_bits1(gb);

  1261. 

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

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

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

  1265. 

  1266.     if (pps->tiles_enabled_flag) {

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

  1268.         pps->num_tile_rows    = get_ue_golomb_long(gb) + 1;

  1269.         if (pps->num_tile_columns == 0 ||

  1270.             pps->num_tile_columns >= sps->width) {

  1271.             av_log(avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1272.                    pps->num_tile_columns - 1);

  1273.             ret = AVERROR_INVALIDDATA;

  1274.             goto err;

  1275.         }

  1276.         if (pps->num_tile_rows == 0 ||

  1277.             pps->num_tile_rows >= sps->height) {

  1278.             av_log(avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1279.                    pps->num_tile_rows - 1);

  1280.             ret = AVERROR_INVALIDDATA;

  1281.             goto err;

  1282.         }

  1283. 

  1284.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1285.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1286.         if (!pps->column_width || !pps->row_height) {

  1287.             ret = AVERROR(ENOMEM);

  1288.             goto err;

  1289.         }

  1290. 

  1291.         pps->uniform_spacing_flag = get_bits1(gb);

  1292.         if (!pps->uniform_spacing_flag) {

  1293.             uint64_t sum = 0;

  1294.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1295.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1296.                 sum                 += pps->column_width[i];

  1297.             }

  1298.             if (sum >= sps->ctb_width) {

  1299.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1300.                 ret = AVERROR_INVALIDDATA;

  1301.                 goto err;

  1302.             }

  1303.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1304. 

  1305.             sum = 0;

  1306.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1307.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1308.                 sum               += pps->row_height[i];

  1309.             }

  1310.             if (sum >= sps->ctb_height) {

  1311.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1312.                 ret = AVERROR_INVALIDDATA;

  1313.                 goto err;

  1314.             }

  1315.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1316.         }

  1317.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1318.     }

  1319. 

  1320.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1321. 

  1322.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1323.     if (pps->deblocking_filter_control_present_flag) {

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

  1325.         pps->disable_dbf                             = get_bits1(gb);

  1326.         if (!pps->disable_dbf) {

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

  1328.             pps->tc_offset = get_se_golomb(gb) * 2;

  1329.             if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {

  1330.                 av_log(avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1331.                        pps->beta_offset/2);

  1332.                 ret = AVERROR_INVALIDDATA;

  1333.                 goto err;

  1334.             }

  1335.             if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {

  1336.                 av_log(avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1337.                        pps->tc_offset/2);

  1338.                 ret = AVERROR_INVALIDDATA;

  1339.                 goto err;

  1340.             }

  1341.         }

  1342.     }

  1343. 

  1344.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1345.     if (pps->scaling_list_data_present_flag) {

  1346.         set_default_scaling_list_data(&pps->scaling_list);

  1347.         ret = scaling_list_data(gb, avctx, &pps->scaling_list);

  1348.         if (ret < 0)

  1349.             goto err;

  1350.     }

  1351.     pps->lists_modification_present_flag = get_bits1(gb);

  1352.     pps->log2_parallel_merge_level       = get_ue_golomb_long(gb) + 2;

  1353.     if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {

  1354.         av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1355.                pps->log2_parallel_merge_level - 2);

  1356.         ret = AVERROR_INVALIDDATA;

  1357.         goto err;

  1358.     }

  1359. 

  1360.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1361.     skip_bits1(gb);     // pps_extension_flag

  1362. 

  1363.     ret = setup_pps(avctx, gb, pps, sps);

  1364.     if (ret < 0)

  1365.         goto err;

  1366. 

  1367.     remove_pps(ps, pps_id);

  1368.     ps->pps_list[pps_id] = pps_buf;

  1369. 

  1370.     return 0;

  1371. 

  1372. err:

  1373.     av_buffer_unref(&pps_buf);

  1374.     return ret;

  1375. }