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FFmpeg/libavcodec/hevc_ps.c

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  1. /*

  2.  * HEVC Parameter Set decoding

  3.  *

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

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

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

  7.  * Copyright (C) 2013 Vittorio Giovara

  8.  *

  9.  * This file is part of FFmpeg.

  10.  *

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

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

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

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

  15.  *

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

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

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

  19.  * Lesser General Public License for more details.

  20.  *

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

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

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

  24.  */

  25. 

  26. #include "libavutil/imgutils.h"

  27. #include "golomb.h"

  28. #include "hevc_data.h"

  29. #include "hevc_ps.h"

  30. 

  31. static const uint8_t default_scaling_list_intra[] = {

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

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

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

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

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

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

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

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

  40. };

  41. 

  42. static const uint8_t default_scaling_list_inter[] = {

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

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

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

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

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

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

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

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

  51. };

  52. 

  53. static const AVRational vui_sar[] = {

  54.     {  0,   1 },

  55.     {  1,   1 },

  56.     { 12,  11 },

  57.     { 10,  11 },

  58.     { 16,  11 },

  59.     { 40,  33 },

  60.     { 24,  11 },

  61.     { 20,  11 },

  62.     { 32,  11 },

  63.     { 80,  33 },

  64.     { 18,  11 },

  65.     { 15,  11 },

  66.     { 64,  33 },

  67.     { 160, 99 },

  68.     {  4,   3 },

  69.     {  3,   2 },

  70.     {  2,   1 },

  71. };

  72. 

  73. static const uint8_t hevc_sub_width_c[] = {

  74.     1, 2, 2, 1

  75. };

  76. 

  77. static const uint8_t hevc_sub_height_c[] = {

  78.     1, 2, 1, 1

  79. };

  80. 

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

  82. {

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

  84.         s->pps = NULL;

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

  86. }

  87. 

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

  89. {

  90.     int i;

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

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

  93.             s->sps = NULL;

  94. 

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

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

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

  98.                 remove_pps(s, i);

  99. 

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

  101.     }

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

  103. }

  104. 

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

  106. {

  107.     int i;

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

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

  110.             s->vps = NULL;

  111. 

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

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

  114.                 remove_sps(s, i);

  115.     }

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

  117. }

  118. 

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

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

  121. {

  122.     uint8_t rps_predict = 0;

  123.     int delta_poc;

  124.     int k0 = 0;

  125.     int k1 = 0;

  126.     int k  = 0;

  127.     int i;

  128. 

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

  130.         rps_predict = get_bits1(gb);

  131. 

  132.     if (rps_predict) {

  133.         const ShortTermRPS *rps_ridx;

  134.         int delta_rps;

  135.         unsigned abs_delta_rps;

  136.         uint8_t use_delta_flag = 0;

  137.         uint8_t delta_rps_sign;

  138. 

  139.         if (is_slice_header) {

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

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

  142.                 av_log(avctx, AV_LOG_ERROR,

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

  144.                        delta_idx, sps->nb_st_rps);

  145.                 return AVERROR_INVALIDDATA;

  146.             }

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

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

  149.         } else

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

  151. 

  152.         delta_rps_sign = get_bits1(gb);

  153.         abs_delta_rps  = get_ue_golomb_long(gb) + 1;

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

  155.             av_log(avctx, AV_LOG_ERROR,

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

  157.                    abs_delta_rps);

  158.             return AVERROR_INVALIDDATA;

  159.         }

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

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

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

  163. 

  164.             if (!used)

  165.                 use_delta_flag = get_bits1(gb);

  166. 

  167.             if (used || use_delta_flag) {

  168.                 if (i < rps_ridx->num_delta_pocs)

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

  170.                 else

  171.                     delta_poc = delta_rps;

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

  173.                 if (delta_poc < 0)

  174.                     k0++;

  175.                 else

  176.                     k1++;

  177.                 k++;

  178.             }

  179.         }

  180. 

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

  182.             av_log(avctx, AV_LOG_ERROR,

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

  184.             return AVERROR_INVALIDDATA;

  185.         }

  186. 

  187.         rps->num_delta_pocs    = k;

  188.         rps->num_negative_pics = k0;

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

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

  191.             int used, tmp;

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

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

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

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

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

  197.                     if (delta_poc < tmp) {

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

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

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

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

  202.                     }

  203.                 }

  204.             }

  205.         }

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

  207.             int used;

  208.             k = rps->num_negative_pics - 1;

  209.             // flip the negative values to largest first

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

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

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

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

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

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

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

  217.                 k--;

  218.             }

  219.         }

  220.     } else {

  221.         unsigned int prev, nb_positive_pics;

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

  223.         nb_positive_pics       = get_ue_golomb_long(gb);

  224. 

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

  226.             nb_positive_pics >= HEVC_MAX_REFS) {

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

  228.             return AVERROR_INVALIDDATA;

  229.         }

  230. 

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

  232.         if (rps->num_delta_pocs) {

  233.             prev = 0;

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

  235.                 delta_poc = get_ue_golomb_long(gb) + 1;

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

  237.                     av_log(avctx, AV_LOG_ERROR,

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

  239.                         delta_poc);

  240.                     return AVERROR_INVALIDDATA;

  241.                 }

  242.                 prev -= delta_poc;

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

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

  245.             }

  246.             prev = 0;

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

  248.                 delta_poc = get_ue_golomb_long(gb) + 1;

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

  250.                     av_log(avctx, AV_LOG_ERROR,

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

  252.                         delta_poc);

  253.                     return AVERROR_INVALIDDATA;

  254.                 }

  255.                 prev += delta_poc;

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

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

  258.             }

  259.         }

  260.     }

  261.     return 0;

  262. }

  263. 

  264. 

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

  266.                                       PTLCommon *ptl)

  267. {

  268.     int i;

  269. 

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

  271.         return -1;

  272. 

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

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

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

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

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

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

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

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

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

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

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

  284.     else

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

  286. 

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

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

  289. 

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

  291.             ptl->profile_idc = i;

  292.     }

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

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

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

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

  297. 

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

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

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

  301. 

  302.     return 0;

  303. }

  304. 

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

  306.                       PTL *ptl, int max_num_sub_layers)

  307. {

  308.     int i;

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

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

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

  312.         return -1;

  313.     }

  314. 

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

  316. 

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

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

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

  320.     }

  321. 

  322.     if (max_num_sub_layers - 1> 0)

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

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

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

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

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

  328.             av_log(avctx, AV_LOG_ERROR,

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

  330.             return -1;

  331.         }

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

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

  334.                 av_log(avctx, AV_LOG_ERROR,

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

  336.                 return -1;

  337.             } else

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

  339.         }

  340.     }

  341. 

  342.     return 0;

  343. }

  344. 

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

  346.                                 int subpic_params_present)

  347. {

  348.     int i;

  349. 

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

  351.         get_ue_golomb_long(gb); // bit_rate_value_minus1

  352.         get_ue_golomb_long(gb); // cpb_size_value_minus1

  353. 

  354.         if (subpic_params_present) {

  355.             get_ue_golomb_long(gb); // cpb_size_du_value_minus1

  356.             get_ue_golomb_long(gb); // bit_rate_du_value_minus1

  357.         }

  358.         skip_bits1(gb); // cbr_flag

  359.     }

  360. }

  361. 

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

  363.                        int max_sublayers)

  364. {

  365.     int nal_params_present = 0, vcl_params_present = 0;

  366.     int subpic_params_present = 0;

  367.     int i;

  368. 

  369.     if (common_inf_present) {

  370.         nal_params_present = get_bits1(gb);

  371.         vcl_params_present = get_bits1(gb);

  372. 

  373.         if (nal_params_present || vcl_params_present) {

  374.             subpic_params_present = get_bits1(gb);

  375. 

  376.             if (subpic_params_present) {

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

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

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

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

  381.             }

  382. 

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

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

  385. 

  386.             if (subpic_params_present)

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

  388. 

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

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

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

  392.         }

  393.     }

  394. 

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

  396.         int low_delay = 0;

  397.         unsigned int nb_cpb = 1;

  398.         int fixed_rate = get_bits1(gb);

  399. 

  400.         if (!fixed_rate)

  401.             fixed_rate = get_bits1(gb);

  402. 

  403.         if (fixed_rate)

  404.             get_ue_golomb_long(gb);  // elemental_duration_in_tc_minus1

  405.         else

  406.             low_delay = get_bits1(gb);

  407. 

  408.         if (!low_delay) {

  409.             nb_cpb = get_ue_golomb_long(gb) + 1;

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

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

  412.                 return AVERROR_INVALIDDATA;

  413.             }

  414.         }

  415. 

  416.         if (nal_params_present)

  417.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  418.         if (vcl_params_present)

  419.             decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);

  420.     }

  421.     return 0;

  422. }

  423. 

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

  425.                            HEVCParamSets *ps)

  426. {

  427.     int i,j;

  428.     int vps_id = 0;

  429.     ptrdiff_t nal_size;

  430.     HEVCVPS *vps;

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

  432. 

  433.     if (!vps_buf)

  434.         return AVERROR(ENOMEM);

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

  436. 

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

  438. 

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

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

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

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

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

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

  445.     } else {

  446.         vps->data_size = nal_size;

  447.     }

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

  449. 

  450.     vps_id = get_bits(gb, 4);

  451.     if (vps_id >= HEVC_MAX_VPS_COUNT) {

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

  453.         goto err;

  454.     }

  455. 

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

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

  458.         goto err;

  459.     }

  460. 

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

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

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

  464. 

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

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

  467.         goto err;

  468.     }

  469. 

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

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

  472.                vps->vps_max_sub_layers);

  473.         goto err;

  474.     }

  475. 

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

  477.         goto err;

  478. 

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

  480. 

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

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

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

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

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

  486. 

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

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

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

  490.             goto err;

  491.         }

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

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

  494.                    vps->vps_num_reorder_pics[i]);

  495.             if (avctx->err_recognition & AV_EF_EXPLODE)

  496.                 goto err;

  497.         }

  498.     }

  499. 

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

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

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

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

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

  505.         goto err;

  506.     }

  507. 

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

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

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

  511. 

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

  513.     if (vps->vps_timing_info_present_flag) {

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

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

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

  517.         if (vps->vps_poc_proportional_to_timing_flag)

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

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

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

  521.             av_log(avctx, AV_LOG_ERROR,

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

  523.             goto err;

  524.         }

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

  526.             int common_inf_present = 1;

  527. 

  528.             get_ue_golomb_long(gb); // hrd_layer_set_idx

  529.             if (i)

  530.                 common_inf_present = get_bits1(gb);

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

  532.         }

  533.     }

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

  535. 

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

  537.         av_log(avctx, AV_LOG_ERROR,

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

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

  540.             goto err;

  541.     }

  542. 

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

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

  545.         av_buffer_unref(&vps_buf);

  546.     } else {

  547.         remove_vps(ps, vps_id);

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

  549.     }

  550. 

  551.     return 0;

  552. 

  553. err:

  554.     av_buffer_unref(&vps_buf);

  555.     return AVERROR_INVALIDDATA;

  556. }

  557. 

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

  559.                        int apply_defdispwin, HEVCSPS *sps)

  560. {

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

  562.     GetBitContext backup;

  563.     int sar_present, alt = 0;

  564. 

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

  566. 

  567.     sar_present = get_bits1(gb);

  568.     if (sar_present) {

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

  570.         if (sar_idx < FF_ARRAY_ELEMS(vui_sar))

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

  572.         else if (sar_idx == 255) {

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

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

  575.         } else

  576.             av_log(avctx, AV_LOG_WARNING,

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

  578.     }

  579. 

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

  581.     if (vui->overscan_info_present_flag)

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

  583. 

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

  585.     if (vui->video_signal_type_present_flag) {

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

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

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

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

  590.             sps->pix_fmt = AV_PIX_FMT_YUVJ420P;

  591.         if (vui->colour_description_present_flag) {

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

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

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

  595. 

  596.             // Set invalid values to "unspecified"

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

  598.                 vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;

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

  600.                 vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;

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

  602.                 vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;

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

  604.                 switch (sps->pix_fmt) {

  605.                 case AV_PIX_FMT_YUV444P:

  606.                     sps->pix_fmt = AV_PIX_FMT_GBRP;

  607.                     break;

  608.                 case AV_PIX_FMT_YUV444P10:

  609.                     sps->pix_fmt = AV_PIX_FMT_GBRP10;

  610.                     break;

  611.                 case AV_PIX_FMT_YUV444P12:

  612.                     sps->pix_fmt = AV_PIX_FMT_GBRP12;

  613.                     break;

  614.                 }

  615.             }

  616.         }

  617.     }

  618. 

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

  620.     if (vui->chroma_loc_info_present_flag) {

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

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

  623.     }

  624. 

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

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

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

  628. 

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

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

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

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

  633.         vui->default_display_window_flag = 0;

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

  635.     } else

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

  637. 

  638.     if (vui->default_display_window_flag) {

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

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

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

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

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

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

  645. 

  646.         if (apply_defdispwin &&

  647.             avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {

  648.             av_log(avctx, AV_LOG_DEBUG,

  649.                    "discarding vui default display window, "

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

  651.                    vui->def_disp_win.left_offset,

  652.                    vui->def_disp_win.right_offset,

  653.                    vui->def_disp_win.top_offset,

  654.                    vui->def_disp_win.bottom_offset);

  655. 

  656.             vui->def_disp_win.left_offset   =

  657.             vui->def_disp_win.right_offset  =

  658.             vui->def_disp_win.top_offset    =

  659.             vui->def_disp_win.bottom_offset = 0;

  660.         }

  661.     }

  662. 

  663. timing_info:

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

  665. 

  666.     if (vui->vui_timing_info_present_flag) {

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

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

  669.             // at where def_disp_win is normally located

  670.             av_log(avctx, AV_LOG_WARNING,

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

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

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

  674.             alt = 1;

  675.             goto timing_info;

  676.         }

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

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

  679.         if (alt) {

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

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

  682.         }

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

  684.         if (vui->vui_poc_proportional_to_timing_flag)

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

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

  687.         if (vui->vui_hrd_parameters_present_flag)

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

  689.     }

  690. 

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

  692.     if (vui->bitstream_restriction_flag) {

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

  694.             av_log(avctx, AV_LOG_WARNING,

  695.                    "Strange VUI bitstream restriction information, retrying"

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

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

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

  699.             alt = 1;

  700.             goto timing_info;

  701.         }

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

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

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

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

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

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

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

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

  710.     }

  711. 

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

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

  714.         av_log(avctx, AV_LOG_WARNING,

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

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

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

  718.         alt = 1;

  719.         goto timing_info;

  720.     }

  721. }

  722. 

  723. static void set_default_scaling_list_data(ScalingList *sl)

  724. {

  725.     int matrixId;

  726. 

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

  728.         // 4x4 default is 16

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

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

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

  732.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  751. }

  752. 

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

  754. {

  755.     uint8_t scaling_list_pred_mode_flag;

  756.     int32_t scaling_list_dc_coef[2][6];

  757.     int size_id, matrix_id, pos;

  758.     int i;

  759. 

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

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

  762.             scaling_list_pred_mode_flag = get_bits1(gb);

  763.             if (!scaling_list_pred_mode_flag) {

  764.                 unsigned int delta = get_ue_golomb_long(gb);

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

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

  767.                 if (delta) {

  768.                     // Copy from previous array.

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

  770.                     if (matrix_id < delta) {

  771.                         av_log(avctx, AV_LOG_ERROR,

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

  773.                         return AVERROR_INVALIDDATA;

  774.                     }

  775. 

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

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

  778.                            size_id > 0 ? 64 : 16);

  779.                     if (size_id > 1)

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

  781.                 }

  782.             } else {

  783.                 int next_coef, coef_num;

  784.                 int32_t scaling_list_delta_coef;

  785. 

  786.                 next_coef = 8;

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

  788.                 if (size_id > 1) {

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

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

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

  792.                 }

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

  794.                     if (size_id == 0)

  795.                         pos = 4 * ff_hevc_diag_scan4x4_y[i] +

  796.                                   ff_hevc_diag_scan4x4_x[i];

  797.                     else

  798.                         pos = 8 * ff_hevc_diag_scan8x8_y[i] +

  799.                                   ff_hevc_diag_scan8x8_x[i];

  800. 

  801.                     scaling_list_delta_coef = get_se_golomb(gb);

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

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

  804.                 }

  805.             }

  806.         }

  807. 

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

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

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

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

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

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

  814.         }

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

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

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

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

  819.     }

  820. 

  821. 

  822.     return 0;

  823. }

  824. 

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

  826. {

  827.     const AVPixFmtDescriptor *desc;

  828.     switch (sps->bit_depth) {

  829.     case 8:

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

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

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

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

  834.        break;

  835.     case 9:

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

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

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

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

  840.         break;

  841.     case 10:

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

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

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

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

  846.         break;

  847.     case 12:

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

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

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

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

  852.         break;

  853.     default:

  854.         av_log(avctx, AV_LOG_ERROR,

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

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

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

  858.         return AVERROR_INVALIDDATA;

  859.     }

  860. 

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

  862.     if (!desc)

  863.         return AVERROR(EINVAL);

  864. 

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

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

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

  868. 

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

  870. 

  871.     return 0;

  872. }

  873. 

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

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

  876. {

  877.     HEVCWindow *ow;

  878.     int ret = 0;

  879.     int log2_diff_max_min_transform_block_size;

  880.     int bit_depth_chroma, start, vui_present, sublayer_ordering_info;

  881.     int i;

  882. 

  883.     // Coded parameters

  884. 

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

  886.     if (sps->vps_id >= HEVC_MAX_VPS_COUNT) {

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

  888.         return AVERROR_INVALIDDATA;

  889.     }

  890. 

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

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

  893.                sps->vps_id);

  894.         return AVERROR_INVALIDDATA;

  895.     }

  896. 

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

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

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

  900.                sps->max_sub_layers);

  901.         return AVERROR_INVALIDDATA;

  902.     }

  903. 

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

  905. 

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

  907.         return ret;

  908. 

  909.     *sps_id = get_ue_golomb_long(gb);

  910.     if (*sps_id >= HEVC_MAX_SPS_COUNT) {

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

  912.         return AVERROR_INVALIDDATA;

  913.     }

  914. 

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

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

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

  918.         return AVERROR_INVALIDDATA;

  919.     }

  920. 

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

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

  923. 

  924.     if (sps->separate_colour_plane_flag)

  925.         sps->chroma_format_idc = 0;

  926. 

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

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

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

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

  931.         return ret;

  932. 

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

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

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

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

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

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

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

  940. 

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

  942.             av_log(avctx, AV_LOG_DEBUG,

  943.                    "discarding sps conformance window, "

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

  945.                    sps->pic_conf_win.left_offset,

  946.                    sps->pic_conf_win.right_offset,

  947.                    sps->pic_conf_win.top_offset,

  948.                    sps->pic_conf_win.bottom_offset);

  949. 

  950.             sps->pic_conf_win.left_offset   =

  951.             sps->pic_conf_win.right_offset  =

  952.             sps->pic_conf_win.top_offset    =

  953.             sps->pic_conf_win.bottom_offset = 0;

  954.         }

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

  956.     }

  957. 

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

  959.     bit_depth_chroma = get_ue_golomb_long(gb) + 8;

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

  961.         av_log(avctx, AV_LOG_ERROR,

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

  963.                "this is unsupported.\n",

  964.                sps->bit_depth, bit_depth_chroma);

  965.         return AVERROR_INVALIDDATA;

  966.     }

  967.     sps->bit_depth_chroma = bit_depth_chroma;

  968. 

  969.     ret = map_pixel_format(avctx, sps);

  970.     if (ret < 0)

  971.         return ret;

  972. 

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

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

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

  976.                sps->log2_max_poc_lsb - 4);

  977.         return AVERROR_INVALIDDATA;

  978.     }

  979. 

  980.     sublayer_ordering_info = get_bits1(gb);

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

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

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

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

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

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

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

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

  989.             return AVERROR_INVALIDDATA;

  990.         }

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

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

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

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

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

  996.                 return AVERROR_INVALIDDATA;

  997.             }

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

  999.         }

  1000.     }

  1001. 

  1002.     if (!sublayer_ordering_info) {

  1003.         for (i = 0; i < start; i++) {

  1004.             sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[start].max_dec_pic_buffering;

  1005.             sps->temporal_layer[i].num_reorder_pics      = sps->temporal_layer[start].num_reorder_pics;

  1006.             sps->temporal_layer[i].max_latency_increase  = sps->temporal_layer[start].max_latency_increase;

  1007.         }

  1008.     }

  1009. 

  1010.     sps->log2_min_cb_size                    = get_ue_golomb_long(gb) + 3;

  1011.     sps->log2_diff_max_min_coding_block_size = get_ue_golomb_long(gb);

  1012.     sps->log2_min_tb_size                    = get_ue_golomb_long(gb) + 2;

  1013.     log2_diff_max_min_transform_block_size   = get_ue_golomb_long(gb);

  1014.     sps->log2_max_trafo_size                 = log2_diff_max_min_transform_block_size +

  1015.                                                sps->log2_min_tb_size;

  1016. 

  1017.     if (sps->log2_min_cb_size < 3 || sps->log2_min_cb_size > 30) {

  1018.         av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_min_cb_size", sps->log2_min_cb_size);

  1019.         return AVERROR_INVALIDDATA;

  1020.     }

  1021. 

  1022.     if (sps->log2_diff_max_min_coding_block_size > 30) {

  1023.         av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_coding_block_size", sps->log2_diff_max_min_coding_block_size);

  1024.         return AVERROR_INVALIDDATA;

  1025.     }

  1026. 

  1027.     if (sps->log2_min_tb_size >= sps->log2_min_cb_size || sps->log2_min_tb_size < 2) {

  1028.         av_log(avctx, AV_LOG_ERROR, "Invalid value for log2_min_tb_size");

  1029.         return AVERROR_INVALIDDATA;

  1030.     }

  1031. 

  1032.     if (log2_diff_max_min_transform_block_size < 0 || log2_diff_max_min_transform_block_size > 30) {

  1033.         av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_transform_block_size", log2_diff_max_min_transform_block_size);

  1034.         return AVERROR_INVALIDDATA;

  1035.     }

  1036. 

  1037.     sps->max_transform_hierarchy_depth_inter = get_ue_golomb_long(gb);

  1038.     sps->max_transform_hierarchy_depth_intra = get_ue_golomb_long(gb);

  1039. 

  1040.     sps->scaling_list_enable_flag = get_bits1(gb);

  1041.     if (sps->scaling_list_enable_flag) {

  1042.         set_default_scaling_list_data(&sps->scaling_list);

  1043. 

  1044.         if (get_bits1(gb)) {

  1045.             ret = scaling_list_data(gb, avctx, &sps->scaling_list, sps);

  1046.             if (ret < 0)

  1047.                 return ret;

  1048.         }

  1049.     }

  1050. 

  1051.     sps->amp_enabled_flag = get_bits1(gb);

  1052.     sps->sao_enabled      = get_bits1(gb);

  1053. 

  1054.     sps->pcm_enabled_flag = get_bits1(gb);

  1055.     if (sps->pcm_enabled_flag) {

  1056.         sps->pcm.bit_depth   = get_bits(gb, 4) + 1;

  1057.         sps->pcm.bit_depth_chroma = get_bits(gb, 4) + 1;

  1058.         sps->pcm.log2_min_pcm_cb_size = get_ue_golomb_long(gb) + 3;

  1059.         sps->pcm.log2_max_pcm_cb_size = sps->pcm.log2_min_pcm_cb_size +

  1060.                                         get_ue_golomb_long(gb);

  1061.         if (FFMAX(sps->pcm.bit_depth, sps->pcm.bit_depth_chroma) > sps->bit_depth) {

  1062.             av_log(avctx, AV_LOG_ERROR,

  1063.                    "PCM bit depth (%d, %d) is greater than normal bit depth (%d)\n",

  1064.                    sps->pcm.bit_depth, sps->pcm.bit_depth_chroma, sps->bit_depth);

  1065.             return AVERROR_INVALIDDATA;

  1066.         }

  1067. 

  1068.         sps->pcm.loop_filter_disable_flag = get_bits1(gb);

  1069.     }

  1070. 

  1071.     sps->nb_st_rps = get_ue_golomb_long(gb);

  1072.     if (sps->nb_st_rps > HEVC_MAX_SHORT_TERM_REF_PIC_SETS) {

  1073.         av_log(avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",

  1074.                sps->nb_st_rps);

  1075.         return AVERROR_INVALIDDATA;

  1076.     }

  1077.     for (i = 0; i < sps->nb_st_rps; i++) {

  1078.         if ((ret = ff_hevc_decode_short_term_rps(gb, avctx, &sps->st_rps[i],

  1079.                                                  sps, 0)) < 0)

  1080.             return ret;

  1081.     }

  1082. 

  1083.     sps->long_term_ref_pics_present_flag = get_bits1(gb);

  1084.     if (sps->long_term_ref_pics_present_flag) {

  1085.         sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);

  1086.         if (sps->num_long_term_ref_pics_sps > HEVC_MAX_LONG_TERM_REF_PICS) {

  1087.             av_log(avctx, AV_LOG_ERROR, "Too many long term ref pics: %d.\n",

  1088.                    sps->num_long_term_ref_pics_sps);

  1089.             return AVERROR_INVALIDDATA;

  1090.         }

  1091.         for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {

  1092.             sps->lt_ref_pic_poc_lsb_sps[i]       = get_bits(gb, sps->log2_max_poc_lsb);

  1093.             sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);

  1094.         }

  1095.     }

  1096. 

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

  1098.     sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);

  1099.     sps->vui.sar = (AVRational){0, 1};

  1100.     vui_present = get_bits1(gb);

  1101.     if (vui_present)

  1102.         decode_vui(gb, avctx, apply_defdispwin, sps);

  1103. 

  1104.     if (get_bits1(gb)) { // sps_extension_flag

  1105.         int sps_range_extension_flag = get_bits1(gb);

  1106.         skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);

  1107.         if (sps_range_extension_flag) {

  1108.             int extended_precision_processing_flag;

  1109.             int cabac_bypass_alignment_enabled_flag;

  1110. 

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

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

  1113.             sps->implicit_rdpcm_enabled_flag = get_bits1(gb);

  1114. 

  1115.             sps->explicit_rdpcm_enabled_flag = get_bits1(gb);

  1116. 

  1117.             extended_precision_processing_flag = get_bits1(gb);

  1118.             if (extended_precision_processing_flag)

  1119.                 av_log(avctx, AV_LOG_WARNING,

  1120.                    "extended_precision_processing_flag not yet implemented\n");

  1121. 

  1122.             sps->intra_smoothing_disabled_flag       = get_bits1(gb);

  1123.             sps->high_precision_offsets_enabled_flag = get_bits1(gb);

  1124.             if (sps->high_precision_offsets_enabled_flag)

  1125.                 av_log(avctx, AV_LOG_WARNING,

  1126.                    "high_precision_offsets_enabled_flag not yet implemented\n");

  1127. 

  1128.             sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);

  1129. 

  1130.             cabac_bypass_alignment_enabled_flag  = get_bits1(gb);

  1131.             if (cabac_bypass_alignment_enabled_flag)

  1132.                 av_log(avctx, AV_LOG_WARNING,

  1133.                    "cabac_bypass_alignment_enabled_flag not yet implemented\n");

  1134.         }

  1135.     }

  1136.     if (apply_defdispwin) {

  1137.         sps->output_window.left_offset   += sps->vui.def_disp_win.left_offset;

  1138.         sps->output_window.right_offset  += sps->vui.def_disp_win.right_offset;

  1139.         sps->output_window.top_offset    += sps->vui.def_disp_win.top_offset;

  1140.         sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;

  1141.     }

  1142. 

  1143.     ow = &sps->output_window;

  1144.     if (ow->left_offset >= INT_MAX - ow->right_offset     ||

  1145.         ow->top_offset  >= INT_MAX - ow->bottom_offset    ||

  1146.         ow->left_offset + ow->right_offset  >= sps->width ||

  1147.         ow->top_offset  + ow->bottom_offset >= sps->height) {

  1148.         av_log(avctx, AV_LOG_WARNING, "Invalid cropping offsets: %u/%u/%u/%u\n",

  1149.                ow->left_offset, ow->right_offset, ow->top_offset, ow->bottom_offset);

  1150.         if (avctx->err_recognition & AV_EF_EXPLODE) {

  1151.             return AVERROR_INVALIDDATA;

  1152.         }

  1153.         av_log(avctx, AV_LOG_WARNING,

  1154.                "Displaying the whole video surface.\n");

  1155.         memset(ow, 0, sizeof(*ow));

  1156.         memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));

  1157.     }

  1158. 

  1159.     // Inferred parameters

  1160.     sps->log2_ctb_size = sps->log2_min_cb_size +

  1161.                          sps->log2_diff_max_min_coding_block_size;

  1162.     sps->log2_min_pu_size = sps->log2_min_cb_size - 1;

  1163. 

  1164.     if (sps->log2_ctb_size > HEVC_MAX_LOG2_CTB_SIZE) {

  1165.         av_log(avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);

  1166.         return AVERROR_INVALIDDATA;

  1167.     }

  1168.     if (sps->log2_ctb_size < 4) {

  1169.         av_log(avctx,

  1170.                AV_LOG_ERROR,

  1171.                "log2_ctb_size %d differs from the bounds of any known profile\n",

  1172.                sps->log2_ctb_size);

  1173.         avpriv_request_sample(avctx, "log2_ctb_size %d", sps->log2_ctb_size);

  1174.         return AVERROR_INVALIDDATA;

  1175.     }

  1176. 

  1177.     sps->ctb_width  = (sps->width  + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1178.     sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;

  1179.     sps->ctb_size   = sps->ctb_width * sps->ctb_height;

  1180. 

  1181.     sps->min_cb_width  = sps->width  >> sps->log2_min_cb_size;

  1182.     sps->min_cb_height = sps->height >> sps->log2_min_cb_size;

  1183.     sps->min_tb_width  = sps->width  >> sps->log2_min_tb_size;

  1184.     sps->min_tb_height = sps->height >> sps->log2_min_tb_size;

  1185.     sps->min_pu_width  = sps->width  >> sps->log2_min_pu_size;

  1186.     sps->min_pu_height = sps->height >> sps->log2_min_pu_size;

  1187.     sps->tb_mask       = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;

  1188. 

  1189.     sps->qp_bd_offset = 6 * (sps->bit_depth - 8);

  1190. 

  1191.     if (av_mod_uintp2(sps->width, sps->log2_min_cb_size) ||

  1192.         av_mod_uintp2(sps->height, sps->log2_min_cb_size)) {

  1193.         av_log(avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");

  1194.         return AVERROR_INVALIDDATA;

  1195.     }

  1196. 

  1197.     if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1198.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",

  1199.                sps->max_transform_hierarchy_depth_inter);

  1200.         return AVERROR_INVALIDDATA;

  1201.     }

  1202.     if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {

  1203.         av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",

  1204.                sps->max_transform_hierarchy_depth_intra);

  1205.         return AVERROR_INVALIDDATA;

  1206.     }

  1207.     if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {

  1208.         av_log(avctx, AV_LOG_ERROR,

  1209.                "max transform block size out of range: %d\n",

  1210.                sps->log2_max_trafo_size);

  1211.         return AVERROR_INVALIDDATA;

  1212.     }

  1213. 

  1214.     if (get_bits_left(gb) < 0) {

  1215.         av_log(avctx, AV_LOG_ERROR,

  1216.                "Overread SPS by %d bits\n", -get_bits_left(gb));

  1217.         return AVERROR_INVALIDDATA;

  1218.     }

  1219. 

  1220.     return 0;

  1221. }

  1222. 

  1223. int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,

  1224.                            HEVCParamSets *ps, int apply_defdispwin)

  1225. {

  1226.     HEVCSPS *sps;

  1227.     AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));

  1228.     unsigned int sps_id;

  1229.     int ret;

  1230.     ptrdiff_t nal_size;

  1231. 

  1232.     if (!sps_buf)

  1233.         return AVERROR(ENOMEM);

  1234.     sps = (HEVCSPS*)sps_buf->data;

  1235. 

  1236.     av_log(avctx, AV_LOG_DEBUG, "Decoding SPS\n");

  1237. 

  1238.     nal_size = gb->buffer_end - gb->buffer;

  1239.     if (nal_size > sizeof(sps->data)) {

  1240.         av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS "

  1241.                "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",

  1242.                nal_size, sizeof(sps->data));

  1243.         sps->data_size = sizeof(sps->data);

  1244.     } else {

  1245.         sps->data_size = nal_size;

  1246.     }

  1247.     memcpy(sps->data, gb->buffer, sps->data_size);

  1248. 

  1249.     ret = ff_hevc_parse_sps(sps, gb, &sps_id,

  1250.                             apply_defdispwin,

  1251.                             ps->vps_list, avctx);

  1252.     if (ret < 0) {

  1253.         av_buffer_unref(&sps_buf);

  1254.         return ret;

  1255.     }

  1256. 

  1257.     if (avctx->debug & FF_DEBUG_BITSTREAM) {

  1258.         av_log(avctx, AV_LOG_DEBUG,

  1259.                "Parsed SPS: id %d; coded wxh: %dx%d; "

  1260.                "cropped wxh: %dx%d; pix_fmt: %s.\n",

  1261.                sps_id, sps->width, sps->height,

  1262.                sps->width - (sps->output_window.left_offset + sps->output_window.right_offset),

  1263.                sps->height - (sps->output_window.top_offset + sps->output_window.bottom_offset),

  1264.                av_get_pix_fmt_name(sps->pix_fmt));

  1265.     }

  1266. 

  1267.     /* check if this is a repeat of an already parsed SPS, then keep the

  1268.      * original one.

  1269.      * otherwise drop all PPSes that depend on it */

  1270.     if (ps->sps_list[sps_id] &&

  1271.         !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {

  1272.         av_buffer_unref(&sps_buf);

  1273.     } else {

  1274.         remove_sps(ps, sps_id);

  1275.         ps->sps_list[sps_id] = sps_buf;

  1276.     }

  1277. 

  1278.     return 0;

  1279. }

  1280. 

  1281. static void hevc_pps_free(void *opaque, uint8_t *data)

  1282. {

  1283.     HEVCPPS *pps = (HEVCPPS*)data;

  1284. 

  1285.     av_freep(&pps->column_width);

  1286.     av_freep(&pps->row_height);

  1287.     av_freep(&pps->col_bd);

  1288.     av_freep(&pps->row_bd);

  1289.     av_freep(&pps->col_idxX);

  1290.     av_freep(&pps->ctb_addr_rs_to_ts);

  1291.     av_freep(&pps->ctb_addr_ts_to_rs);

  1292.     av_freep(&pps->tile_pos_rs);

  1293.     av_freep(&pps->tile_id);

  1294.     av_freep(&pps->min_tb_addr_zs_tab);

  1295. 

  1296.     av_freep(&pps);

  1297. }

  1298. 

  1299. static int pps_range_extensions(GetBitContext *gb, AVCodecContext *avctx,

  1300.                                 HEVCPPS *pps, HEVCSPS *sps) {

  1301.     int i;

  1302. 

  1303.     if (pps->transform_skip_enabled_flag) {

  1304.         pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;

  1305.     }

  1306.     pps->cross_component_prediction_enabled_flag = get_bits1(gb);

  1307.     pps->chroma_qp_offset_list_enabled_flag = get_bits1(gb);

  1308.     if (pps->chroma_qp_offset_list_enabled_flag) {

  1309.         pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);

  1310.         pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);

  1311.         if (pps->chroma_qp_offset_list_len_minus1 > 5) {

  1312.             av_log(avctx, AV_LOG_ERROR,

  1313.                    "chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");

  1314.             return AVERROR_INVALIDDATA;

  1315.         }

  1316.         for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {

  1317.             pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);

  1318.             if (pps->cb_qp_offset_list[i]) {

  1319.                 av_log(avctx, AV_LOG_WARNING,

  1320.                        "cb_qp_offset_list not tested yet.\n");

  1321.             }

  1322.             pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);

  1323.             if (pps->cr_qp_offset_list[i]) {

  1324.                 av_log(avctx, AV_LOG_WARNING,

  1325.                        "cb_qp_offset_list not tested yet.\n");

  1326.             }

  1327.         }

  1328.     }

  1329.     pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);

  1330.     pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);

  1331. 

  1332.     if (   pps->log2_sao_offset_scale_luma   > FFMAX(sps->bit_depth        - 10, 0)

  1333.         || pps->log2_sao_offset_scale_chroma > FFMAX(sps->bit_depth_chroma - 10, 0)

  1334.     )

  1335.         return AVERROR_INVALIDDATA;

  1336. 

  1337.     return(0);

  1338. }

  1339. 

  1340. static inline int setup_pps(AVCodecContext *avctx, GetBitContext *gb,

  1341.                             HEVCPPS *pps, HEVCSPS *sps)

  1342. {

  1343.     int log2_diff;

  1344.     int pic_area_in_ctbs;

  1345.     int i, j, x, y, ctb_addr_rs, tile_id;

  1346. 

  1347.     // Inferred parameters

  1348.     pps->col_bd   = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));

  1349.     pps->row_bd   = av_malloc_array(pps->num_tile_rows + 1,    sizeof(*pps->row_bd));

  1350.     pps->col_idxX = av_malloc_array(sps->ctb_width,    sizeof(*pps->col_idxX));

  1351.     if (!pps->col_bd || !pps->row_bd || !pps->col_idxX)

  1352.         return AVERROR(ENOMEM);

  1353. 

  1354.     if (pps->uniform_spacing_flag) {

  1355.         if (!pps->column_width) {

  1356.             pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1357.             pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1358.         }

  1359.         if (!pps->column_width || !pps->row_height)

  1360.             return AVERROR(ENOMEM);

  1361. 

  1362.         for (i = 0; i < pps->num_tile_columns; i++) {

  1363.             pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -

  1364.                                    (i * sps->ctb_width) / pps->num_tile_columns;

  1365.         }

  1366. 

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

  1368.             pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -

  1369.                                  (i * sps->ctb_height) / pps->num_tile_rows;

  1370.         }

  1371.     }

  1372. 

  1373.     pps->col_bd[0] = 0;

  1374.     for (i = 0; i < pps->num_tile_columns; i++)

  1375.         pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];

  1376. 

  1377.     pps->row_bd[0] = 0;

  1378.     for (i = 0; i < pps->num_tile_rows; i++)

  1379.         pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];

  1380. 

  1381.     for (i = 0, j = 0; i < sps->ctb_width; i++) {

  1382.         if (i > pps->col_bd[j])

  1383.             j++;

  1384.         pps->col_idxX[i] = j;

  1385.     }

  1386. 

  1387.     /**

  1388.      * 6.5

  1389.      */

  1390.     pic_area_in_ctbs     = sps->ctb_width    * sps->ctb_height;

  1391. 

  1392.     pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_rs_to_ts));

  1393.     pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->ctb_addr_ts_to_rs));

  1394.     pps->tile_id           = av_malloc_array(pic_area_in_ctbs,    sizeof(*pps->tile_id));

  1395.     pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));

  1396.     if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||

  1397.         !pps->tile_id || !pps->min_tb_addr_zs_tab) {

  1398.         return AVERROR(ENOMEM);

  1399.     }

  1400. 

  1401.     for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {

  1402.         int tb_x   = ctb_addr_rs % sps->ctb_width;

  1403.         int tb_y   = ctb_addr_rs / sps->ctb_width;

  1404.         int tile_x = 0;

  1405.         int tile_y = 0;

  1406.         int val    = 0;

  1407. 

  1408.         for (i = 0; i < pps->num_tile_columns; i++) {

  1409.             if (tb_x < pps->col_bd[i + 1]) {

  1410.                 tile_x = i;

  1411.                 break;

  1412.             }

  1413.         }

  1414. 

  1415.         for (i = 0; i < pps->num_tile_rows; i++) {

  1416.             if (tb_y < pps->row_bd[i + 1]) {

  1417.                 tile_y = i;

  1418.                 break;

  1419.             }

  1420.         }

  1421. 

  1422.         for (i = 0; i < tile_x; i++)

  1423.             val += pps->row_height[tile_y] * pps->column_width[i];

  1424.         for (i = 0; i < tile_y; i++)

  1425.             val += sps->ctb_width * pps->row_height[i];

  1426. 

  1427.         val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +

  1428.                tb_x - pps->col_bd[tile_x];

  1429. 

  1430.         pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;

  1431.         pps->ctb_addr_ts_to_rs[val]         = ctb_addr_rs;

  1432.     }

  1433. 

  1434.     for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)

  1435.         for (i = 0; i < pps->num_tile_columns; i++, tile_id++)

  1436.             for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)

  1437.                 for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)

  1438.                     pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;

  1439. 

  1440.     pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));

  1441.     if (!pps->tile_pos_rs)

  1442.         return AVERROR(ENOMEM);

  1443. 

  1444.     for (j = 0; j < pps->num_tile_rows; j++)

  1445.         for (i = 0; i < pps->num_tile_columns; i++)

  1446.             pps->tile_pos_rs[j * pps->num_tile_columns + i] =

  1447.                 pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];

  1448. 

  1449.     log2_diff = sps->log2_ctb_size - sps->log2_min_tb_size;

  1450.     pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];

  1451.     for (y = 0; y < sps->tb_mask+2; y++) {

  1452.         pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;

  1453.         pps->min_tb_addr_zs_tab[y]    = -1;

  1454.     }

  1455.     for (y = 0; y < sps->tb_mask+1; y++) {

  1456.         for (x = 0; x < sps->tb_mask+1; x++) {

  1457.             int tb_x = x >> log2_diff;

  1458.             int tb_y = y >> log2_diff;

  1459.             int rs   = sps->ctb_width * tb_y + tb_x;

  1460.             int val  = pps->ctb_addr_rs_to_ts[rs] << (log2_diff * 2);

  1461.             for (i = 0; i < log2_diff; i++) {

  1462.                 int m = 1 << i;

  1463.                 val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);

  1464.             }

  1465.             pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;

  1466.         }

  1467.     }

  1468. 

  1469.     return 0;

  1470. }

  1471. 

  1472. int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,

  1473.                            HEVCParamSets *ps)

  1474. {

  1475.     HEVCSPS      *sps = NULL;

  1476.     int i, ret = 0;

  1477.     unsigned int pps_id = 0;

  1478.     ptrdiff_t nal_size;

  1479.     unsigned log2_parallel_merge_level_minus2;

  1480. 

  1481.     AVBufferRef *pps_buf;

  1482.     HEVCPPS *pps = av_mallocz(sizeof(*pps));

  1483. 

  1484.     if (!pps)

  1485.         return AVERROR(ENOMEM);

  1486. 

  1487.     pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),

  1488.                                hevc_pps_free, NULL, 0);

  1489.     if (!pps_buf) {

  1490.         av_freep(&pps);

  1491.         return AVERROR(ENOMEM);

  1492.     }

  1493. 

  1494.     av_log(avctx, AV_LOG_DEBUG, "Decoding PPS\n");

  1495. 

  1496.     nal_size = gb->buffer_end - gb->buffer;

  1497.     if (nal_size > sizeof(pps->data)) {

  1498.         av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "

  1499.                "(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",

  1500.                nal_size, sizeof(pps->data));

  1501.         pps->data_size = sizeof(pps->data);

  1502.     } else {

  1503.         pps->data_size = nal_size;

  1504.     }

  1505.     memcpy(pps->data, gb->buffer, pps->data_size);

  1506. 

  1507.     // Default values

  1508.     pps->loop_filter_across_tiles_enabled_flag = 1;

  1509.     pps->num_tile_columns                      = 1;

  1510.     pps->num_tile_rows                         = 1;

  1511.     pps->uniform_spacing_flag                  = 1;

  1512.     pps->disable_dbf                           = 0;

  1513.     pps->beta_offset                           = 0;

  1514.     pps->tc_offset                             = 0;

  1515.     pps->log2_max_transform_skip_block_size    = 2;

  1516. 

  1517.     // Coded parameters

  1518.     pps_id = get_ue_golomb_long(gb);

  1519.     if (pps_id >= HEVC_MAX_PPS_COUNT) {

  1520.         av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);

  1521.         ret = AVERROR_INVALIDDATA;

  1522.         goto err;

  1523.     }

  1524.     pps->sps_id = get_ue_golomb_long(gb);

  1525.     if (pps->sps_id >= HEVC_MAX_SPS_COUNT) {

  1526.         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);

  1527.         ret = AVERROR_INVALIDDATA;

  1528.         goto err;

  1529.     }

  1530.     if (!ps->sps_list[pps->sps_id]) {

  1531.         av_log(avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);

  1532.         ret = AVERROR_INVALIDDATA;

  1533.         goto err;

  1534.     }

  1535.     sps = (HEVCSPS *)ps->sps_list[pps->sps_id]->data;

  1536. 

  1537.     pps->dependent_slice_segments_enabled_flag = get_bits1(gb);

  1538.     pps->output_flag_present_flag              = get_bits1(gb);

  1539.     pps->num_extra_slice_header_bits           = get_bits(gb, 3);

  1540. 

  1541.     pps->sign_data_hiding_flag = get_bits1(gb);

  1542. 

  1543.     pps->cabac_init_present_flag = get_bits1(gb);

  1544. 

  1545.     pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;

  1546.     pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;

  1547. 

  1548.     pps->pic_init_qp_minus26 = get_se_golomb(gb);

  1549. 

  1550.     pps->constrained_intra_pred_flag = get_bits1(gb);

  1551.     pps->transform_skip_enabled_flag = get_bits1(gb);

  1552. 

  1553.     pps->cu_qp_delta_enabled_flag = get_bits1(gb);

  1554.     pps->diff_cu_qp_delta_depth   = 0;

  1555.     if (pps->cu_qp_delta_enabled_flag)

  1556.         pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);

  1557. 

  1558.     if (pps->diff_cu_qp_delta_depth < 0 ||

  1559.         pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {

  1560.         av_log(avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",

  1561.                pps->diff_cu_qp_delta_depth);

  1562.         ret = AVERROR_INVALIDDATA;

  1563.         goto err;

  1564.     }

  1565. 

  1566.     pps->cb_qp_offset = get_se_golomb(gb);

  1567.     if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {

  1568.         av_log(avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",

  1569.                pps->cb_qp_offset);

  1570.         ret = AVERROR_INVALIDDATA;

  1571.         goto err;

  1572.     }

  1573.     pps->cr_qp_offset = get_se_golomb(gb);

  1574.     if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {

  1575.         av_log(avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",

  1576.                pps->cr_qp_offset);

  1577.         ret = AVERROR_INVALIDDATA;

  1578.         goto err;

  1579.     }

  1580.     pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);

  1581. 

  1582.     pps->weighted_pred_flag   = get_bits1(gb);

  1583.     pps->weighted_bipred_flag = get_bits1(gb);

  1584. 

  1585.     pps->transquant_bypass_enable_flag    = get_bits1(gb);

  1586.     pps->tiles_enabled_flag               = get_bits1(gb);

  1587.     pps->entropy_coding_sync_enabled_flag = get_bits1(gb);

  1588. 

  1589.     if (pps->tiles_enabled_flag) {

  1590.         int num_tile_columns_minus1 = get_ue_golomb(gb);

  1591.         int num_tile_rows_minus1    = get_ue_golomb(gb);

  1592. 

  1593.         if (num_tile_columns_minus1 < 0 ||

  1594.             num_tile_columns_minus1 >= sps->ctb_width - 1) {

  1595.             av_log(avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",

  1596.                    num_tile_columns_minus1);

  1597.             ret = num_tile_columns_minus1 < 0 ? num_tile_columns_minus1 : AVERROR_INVALIDDATA;

  1598.             goto err;

  1599.         }

  1600.         if (num_tile_rows_minus1 < 0 ||

  1601.             num_tile_rows_minus1 >= sps->ctb_height - 1) {

  1602.             av_log(avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",

  1603.                    num_tile_rows_minus1);

  1604.             ret = num_tile_rows_minus1 < 0 ? num_tile_rows_minus1 : AVERROR_INVALIDDATA;

  1605.             goto err;

  1606.         }

  1607.         pps->num_tile_columns = num_tile_columns_minus1 + 1;

  1608.         pps->num_tile_rows    = num_tile_rows_minus1    + 1;

  1609. 

  1610.         pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));

  1611.         pps->row_height   = av_malloc_array(pps->num_tile_rows,    sizeof(*pps->row_height));

  1612.         if (!pps->column_width || !pps->row_height) {

  1613.             ret = AVERROR(ENOMEM);

  1614.             goto err;

  1615.         }

  1616. 

  1617.         pps->uniform_spacing_flag = get_bits1(gb);

  1618.         if (!pps->uniform_spacing_flag) {

  1619.             uint64_t sum = 0;

  1620.             for (i = 0; i < pps->num_tile_columns - 1; i++) {

  1621.                 pps->column_width[i] = get_ue_golomb_long(gb) + 1;

  1622.                 sum                 += pps->column_width[i];

  1623.             }

  1624.             if (sum >= sps->ctb_width) {

  1625.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile widths.\n");

  1626.                 ret = AVERROR_INVALIDDATA;

  1627.                 goto err;

  1628.             }

  1629.             pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;

  1630. 

  1631.             sum = 0;

  1632.             for (i = 0; i < pps->num_tile_rows - 1; i++) {

  1633.                 pps->row_height[i] = get_ue_golomb_long(gb) + 1;

  1634.                 sum               += pps->row_height[i];

  1635.             }

  1636.             if (sum >= sps->ctb_height) {

  1637.                 av_log(avctx, AV_LOG_ERROR, "Invalid tile heights.\n");

  1638.                 ret = AVERROR_INVALIDDATA;

  1639.                 goto err;

  1640.             }

  1641.             pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;

  1642.         }

  1643.         pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);

  1644.     }

  1645. 

  1646.     pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);

  1647. 

  1648.     pps->deblocking_filter_control_present_flag = get_bits1(gb);

  1649.     if (pps->deblocking_filter_control_present_flag) {

  1650.         pps->deblocking_filter_override_enabled_flag = get_bits1(gb);

  1651.         pps->disable_dbf                             = get_bits1(gb);

  1652.         if (!pps->disable_dbf) {

  1653.             int beta_offset_div2 = get_se_golomb(gb);

  1654.             int tc_offset_div2   = get_se_golomb(gb) ;

  1655.             if (beta_offset_div2 < -6 || beta_offset_div2 > 6) {

  1656.                 av_log(avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",

  1657.                        beta_offset_div2);

  1658.                 ret = AVERROR_INVALIDDATA;

  1659.                 goto err;

  1660.             }

  1661.             if (tc_offset_div2 < -6 || tc_offset_div2 > 6) {

  1662.                 av_log(avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",

  1663.                        tc_offset_div2);

  1664.                 ret = AVERROR_INVALIDDATA;

  1665.                 goto err;

  1666.             }

  1667.             pps->beta_offset = 2 * beta_offset_div2;

  1668.             pps->tc_offset   = 2 *   tc_offset_div2;

  1669.         }

  1670.     }

  1671. 

  1672.     pps->scaling_list_data_present_flag = get_bits1(gb);

  1673.     if (pps->scaling_list_data_present_flag) {

  1674.         set_default_scaling_list_data(&pps->scaling_list);

  1675.         ret = scaling_list_data(gb, avctx, &pps->scaling_list, sps);

  1676.         if (ret < 0)

  1677.             goto err;

  1678.     }

  1679.     pps->lists_modification_present_flag = get_bits1(gb);

  1680.     log2_parallel_merge_level_minus2     = get_ue_golomb_long(gb);

  1681.     if (log2_parallel_merge_level_minus2 > sps->log2_ctb_size) {

  1682.         av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",

  1683.                log2_parallel_merge_level_minus2);

  1684.         ret = AVERROR_INVALIDDATA;

  1685.         goto err;

  1686.     }

  1687.     pps->log2_parallel_merge_level       = log2_parallel_merge_level_minus2 + 2;

  1688. 

  1689.     pps->slice_header_extension_present_flag = get_bits1(gb);

  1690. 

  1691.     if (get_bits1(gb)) { // pps_extension_present_flag

  1692.         int pps_range_extensions_flag = get_bits1(gb);

  1693.         skip_bits(gb, 7); // pps_extension_7bits

  1694.         if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {

  1695.             if ((ret = pps_range_extensions(gb, avctx, pps, sps)) < 0)

  1696.                 goto err;

  1697.         }

  1698.     }

  1699. 

  1700.     ret = setup_pps(avctx, gb, pps, sps);

  1701.     if (ret < 0)

  1702.         goto err;

  1703. 

  1704.     if (get_bits_left(gb) < 0) {

  1705.         av_log(avctx, AV_LOG_ERROR,

  1706.                "Overread PPS by %d bits\n", -get_bits_left(gb));

  1707.         goto err;

  1708.     }

  1709. 

  1710.     remove_pps(ps, pps_id);

  1711.     ps->pps_list[pps_id] = pps_buf;

  1712. 

  1713.     return 0;

  1714. 

  1715. err:

  1716.     av_buffer_unref(&pps_buf);

  1717.     return ret;

  1718. }

  1719. 

  1720. void ff_hevc_ps_uninit(HEVCParamSets *ps)

  1721. {

  1722.     int i;

  1723. 

  1724.     for (i = 0; i < FF_ARRAY_ELEMS(ps->vps_list); i++)

  1725.         av_buffer_unref(&ps->vps_list[i]);

  1726.     for (i = 0; i < FF_ARRAY_ELEMS(ps->sps_list); i++)

  1727.         av_buffer_unref(&ps->sps_list[i]);

  1728.     for (i = 0; i < FF_ARRAY_ELEMS(ps->pps_list); i++)

  1729.         av_buffer_unref(&ps->pps_list[i]);

  1730. 

  1731.     ps->sps = NULL;

  1732.     ps->pps = NULL;

  1733.     ps->vps = NULL;

  1734. }

  1735. 

  1736. int ff_hevc_compute_poc(const HEVCSPS *sps, int pocTid0, int poc_lsb, int nal_unit_type)

  1737. {

  1738.     int max_poc_lsb  = 1 << sps->log2_max_poc_lsb;

  1739.     int prev_poc_lsb = pocTid0 % max_poc_lsb;

  1740.     int prev_poc_msb = pocTid0 - prev_poc_lsb;

  1741.     int poc_msb;

  1742. 

  1743.     if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)

  1744.         poc_msb = prev_poc_msb + max_poc_lsb;

  1745.     else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)

  1746.         poc_msb = prev_poc_msb - max_poc_lsb;

  1747.     else

  1748.         poc_msb = prev_poc_msb;

  1749. 

  1750.     // For BLA picture types, POCmsb is set to 0.

  1751.     if (nal_unit_type == HEVC_NAL_BLA_W_LP   ||

  1752.         nal_unit_type == HEVC_NAL_BLA_W_RADL ||

  1753.         nal_unit_type == HEVC_NAL_BLA_N_LP)

  1754.         poc_msb = 0;

  1755. 

  1756.     return poc_msb + poc_lsb;

  1757. }