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FFmpeg/libavcodec/cbs_h265_syntax_template.c

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  1. /*

  2.  * This file is part of FFmpeg.

  3.  *

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

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

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

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

  8.  *

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

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

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

  12.  * Lesser General Public License for more details.

  13.  *

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

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

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

  17.  */

  18. 

  19. static int FUNC(rbsp_trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw)

  20. {

  21.     int err;

  22. 

  23.     fixed(1, rbsp_stop_one_bit, 1);

  24.     while (byte_alignment(rw) != 0)

  25.         fixed(1, rbsp_alignment_zero_bit, 0);

  26. 

  27.     return 0;

  28. }

  29. 

  30. static int FUNC(nal_unit_header)(CodedBitstreamContext *ctx, RWContext *rw,

  31.                                  H265RawNALUnitHeader *current,

  32.                                  int expected_nal_unit_type)

  33. {

  34.     int err;

  35. 

  36.     fixed(1, forbidden_zero_bit, 0);

  37. 

  38.     if (expected_nal_unit_type >= 0)

  39.         u(6, nal_unit_type, expected_nal_unit_type,

  40.                             expected_nal_unit_type);

  41.     else

  42.         ub(6, nal_unit_type);

  43. 

  44.     u(6, nuh_layer_id,          0, 62);

  45.     u(3, nuh_temporal_id_plus1, 1,  7);

  46. 

  47.     return 0;

  48. }

  49. 

  50. static int FUNC(byte_alignment)(CodedBitstreamContext *ctx, RWContext *rw)

  51. {

  52.     int err;

  53. 

  54.     fixed(1, alignment_bit_equal_to_one, 1);

  55.     while (byte_alignment(rw) != 0)

  56.         fixed(1, alignment_bit_equal_to_zero, 0);

  57. 

  58.     return 0;

  59. }

  60. 

  61. static int FUNC(extension_data)(CodedBitstreamContext *ctx, RWContext *rw,

  62.                                 H265RawExtensionData *current)

  63. {

  64.     int err;

  65.     size_t k;

  66. #ifdef READ

  67.     GetBitContext start;

  68.     uint8_t bit;

  69.     start = *rw;

  70.     for (k = 0; cbs_h2645_read_more_rbsp_data(rw); k++)

  71.         skip_bits(rw, 1);

  72.     current->bit_length = k;

  73.     if (k > 0) {

  74.         *rw = start;

  75.         allocate(current->data, (current->bit_length + 7) / 8);

  76.         for (k = 0; k < current->bit_length; k++) {

  77.             xu(1, extension_data, bit, 0, 1, 0);

  78.             current->data[k / 8] |= bit << (7 - k % 8);

  79.         }

  80.     }

  81. #else

  82.     for (k = 0; k < current->bit_length; k++)

  83.         xu(1, extension_data, current->data[k / 8] >> (7 - k % 8) & 1, 0, 1, 0);

  84. #endif

  85.     return 0;

  86. }

  87. 

  88. static int FUNC(profile_tier_level)(CodedBitstreamContext *ctx, RWContext *rw,

  89.                                     H265RawProfileTierLevel *current,

  90.                                     int profile_present_flag,

  91.                                     int max_num_sub_layers_minus1)

  92. {

  93.     int err, i, j;

  94. 

  95.     if (profile_present_flag) {

  96.         u(2, general_profile_space, 0, 0);

  97.         flag(general_tier_flag);

  98.         ub(5, general_profile_idc);

  99. 

  100.         for (j = 0; j < 32; j++)

  101.             flags(general_profile_compatibility_flag[j], 1, j);

  102. 

  103.         flag(general_progressive_source_flag);

  104.         flag(general_interlaced_source_flag);

  105.         flag(general_non_packed_constraint_flag);

  106.         flag(general_frame_only_constraint_flag);

  107. 

  108. #define profile_compatible(x) (current->general_profile_idc == (x) || \

  109.                                current->general_profile_compatibility_flag[x])

  110.         if (profile_compatible(4) || profile_compatible(5) ||

  111.             profile_compatible(6) || profile_compatible(7) ||

  112.             profile_compatible(8) || profile_compatible(9) ||

  113.             profile_compatible(10)) {

  114.             flag(general_max_12bit_constraint_flag);

  115.             flag(general_max_10bit_constraint_flag);

  116.             flag(general_max_8bit_constraint_flag);

  117.             flag(general_max_422chroma_constraint_flag);

  118.             flag(general_max_420chroma_constraint_flag);

  119.             flag(general_max_monochrome_constraint_flag);

  120.             flag(general_intra_constraint_flag);

  121.             flag(general_one_picture_only_constraint_flag);

  122.             flag(general_lower_bit_rate_constraint_flag);

  123. 

  124.             if (profile_compatible(5) || profile_compatible(9) ||

  125.                 profile_compatible(10)) {

  126.                 flag(general_max_14bit_constraint_flag);

  127.                 fixed(24, general_reserved_zero_33bits, 0);

  128.                 fixed( 9, general_reserved_zero_33bits, 0);

  129.             } else {

  130.                 fixed(24, general_reserved_zero_34bits, 0);

  131.                 fixed(10, general_reserved_zero_34bits, 0);

  132.             }

  133.         } else if (profile_compatible(2)) {

  134.             fixed(7, general_reserved_zero_7bits, 0);

  135.             flag(general_one_picture_only_constraint_flag);

  136.             fixed(24, general_reserved_zero_35bits, 0);

  137.             fixed(11, general_reserved_zero_35bits, 0);

  138.         } else {

  139.             fixed(24, general_reserved_zero_43bits, 0);

  140.             fixed(19, general_reserved_zero_43bits, 0);

  141.         }

  142. 

  143.         if (profile_compatible(1) || profile_compatible(2) ||

  144.             profile_compatible(3) || profile_compatible(4) ||

  145.             profile_compatible(5) || profile_compatible(9)) {

  146.             flag(general_inbld_flag);

  147.         } else {

  148.             fixed(1, general_reserved_zero_bit, 0);

  149.         }

  150. #undef profile_compatible

  151.     }

  152. 

  153.     ub(8, general_level_idc);

  154. 

  155.     for (i = 0; i < max_num_sub_layers_minus1; i++) {

  156.         flags(sub_layer_profile_present_flag[i], 1, i);

  157.         flags(sub_layer_level_present_flag[i],   1, i);

  158.     }

  159. 

  160.     if (max_num_sub_layers_minus1 > 0) {

  161.         for (i = max_num_sub_layers_minus1; i < 8; i++)

  162.             fixed(2, reserved_zero_2bits, 0);

  163.     }

  164. 

  165.     for (i = 0; i < max_num_sub_layers_minus1; i++) {

  166.         if (current->sub_layer_profile_present_flag[i]) {

  167.             us(2, sub_layer_profile_space[i], 0, 0, 1, i);

  168.             flags(sub_layer_tier_flag[i],           1, i);

  169.             ubs(5, sub_layer_profile_idc[i], 1, i);

  170. 

  171.             for (j = 0; j < 32; j++)

  172.                 flags(sub_layer_profile_compatibility_flag[i][j], 2, i, j);

  173. 

  174.             flags(sub_layer_progressive_source_flag[i],    1, i);

  175.             flags(sub_layer_interlaced_source_flag[i],     1, i);

  176.             flags(sub_layer_non_packed_constraint_flag[i], 1, i);

  177.             flags(sub_layer_frame_only_constraint_flag[i], 1, i);

  178. 

  179. #define profile_compatible(x) (current->sub_layer_profile_idc[i] == (x) ||   \

  180.                                current->sub_layer_profile_compatibility_flag[i][x])

  181.             if (profile_compatible(4) || profile_compatible(5) ||

  182.                 profile_compatible(6) || profile_compatible(7) ||

  183.                 profile_compatible(8) || profile_compatible(9) ||

  184.                 profile_compatible(10)) {

  185.                 flags(sub_layer_max_12bit_constraint_flag[i],        1, i);

  186.                 flags(sub_layer_max_10bit_constraint_flag[i],        1, i);

  187.                 flags(sub_layer_max_8bit_constraint_flag[i],         1, i);

  188.                 flags(sub_layer_max_422chroma_constraint_flag[i],    1, i);

  189.                 flags(sub_layer_max_420chroma_constraint_flag[i],    1, i);

  190.                 flags(sub_layer_max_monochrome_constraint_flag[i],   1, i);

  191.                 flags(sub_layer_intra_constraint_flag[i],            1, i);

  192.                 flags(sub_layer_one_picture_only_constraint_flag[i], 1, i);

  193.                 flags(sub_layer_lower_bit_rate_constraint_flag[i],   1, i);

  194. 

  195.                 if (profile_compatible(5)) {

  196.                     flags(sub_layer_max_14bit_constraint_flag[i], 1, i);

  197.                     fixed(24, sub_layer_reserved_zero_33bits, 0);

  198.                     fixed( 9, sub_layer_reserved_zero_33bits, 0);

  199.                 } else {

  200.                     fixed(24, sub_layer_reserved_zero_34bits, 0);

  201.                     fixed(10, sub_layer_reserved_zero_34bits, 0);

  202.                 }

  203.             } else if (profile_compatible(2)) {

  204.                 fixed(7, sub_layer_reserved_zero_7bits, 0);

  205.                 flags(sub_layer_one_picture_only_constraint_flag[i], 1, i);

  206.                 fixed(24, sub_layer_reserved_zero_43bits, 0);

  207.                 fixed(11, sub_layer_reserved_zero_43bits, 0);

  208.             } else {

  209.                 fixed(24, sub_layer_reserved_zero_43bits, 0);

  210.                 fixed(19, sub_layer_reserved_zero_43bits, 0);

  211.             }

  212. 

  213.             if (profile_compatible(1) || profile_compatible(2) ||

  214.                 profile_compatible(3) || profile_compatible(4) ||

  215.                 profile_compatible(5) || profile_compatible(9)) {

  216.                 flags(sub_layer_inbld_flag[i], 1, i);

  217.             } else {

  218.                 fixed(1, sub_layer_reserved_zero_bit, 0);

  219.             }

  220. #undef profile_compatible

  221.         }

  222.         if (current->sub_layer_level_present_flag[i])

  223.             ubs(8, sub_layer_level_idc[i], 1, i);

  224.     }

  225. 

  226.     return 0;

  227. }

  228. 

  229. static int FUNC(sub_layer_hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,

  230.                                           H265RawHRDParameters *hrd,

  231.                                           int nal, int sub_layer_id)

  232. {

  233.     H265RawSubLayerHRDParameters *current;

  234.     int err, i;

  235. 

  236.     if (nal)

  237.         current = &hrd->nal_sub_layer_hrd_parameters[sub_layer_id];

  238.     else

  239.         current = &hrd->vcl_sub_layer_hrd_parameters[sub_layer_id];

  240. 

  241.     for (i = 0; i <= hrd->cpb_cnt_minus1[sub_layer_id]; i++) {

  242.         ues(bit_rate_value_minus1[i], 0, UINT32_MAX - 1, 1, i);

  243.         ues(cpb_size_value_minus1[i], 0, UINT32_MAX - 1, 1, i);

  244.         if (hrd->sub_pic_hrd_params_present_flag) {

  245.             ues(cpb_size_du_value_minus1[i], 0, UINT32_MAX - 1, 1, i);

  246.             ues(bit_rate_du_value_minus1[i], 0, UINT32_MAX - 1, 1, i);

  247.         }

  248.         flags(cbr_flag[i], 1, i);

  249.     }

  250. 

  251.     return 0;

  252. }

  253. 

  254. static int FUNC(hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,

  255.                                 H265RawHRDParameters *current, int common_inf_present_flag,

  256.                                 int max_num_sub_layers_minus1)

  257. {

  258.     int err, i;

  259. 

  260.     if (common_inf_present_flag) {

  261.         flag(nal_hrd_parameters_present_flag);

  262.         flag(vcl_hrd_parameters_present_flag);

  263. 

  264.         if (current->nal_hrd_parameters_present_flag ||

  265.             current->vcl_hrd_parameters_present_flag) {

  266.             flag(sub_pic_hrd_params_present_flag);

  267.             if (current->sub_pic_hrd_params_present_flag) {

  268.                 ub(8, tick_divisor_minus2);

  269.                 ub(5, du_cpb_removal_delay_increment_length_minus1);

  270.                 flag(sub_pic_cpb_params_in_pic_timing_sei_flag);

  271.                 ub(5, dpb_output_delay_du_length_minus1);

  272.             }

  273. 

  274.             ub(4, bit_rate_scale);

  275.             ub(4, cpb_size_scale);

  276.             if (current->sub_pic_hrd_params_present_flag)

  277.                 ub(4, cpb_size_du_scale);

  278. 

  279.             ub(5, initial_cpb_removal_delay_length_minus1);

  280.             ub(5, au_cpb_removal_delay_length_minus1);

  281.             ub(5, dpb_output_delay_length_minus1);

  282.         } else {

  283.             infer(sub_pic_hrd_params_present_flag, 0);

  284. 

  285.             infer(initial_cpb_removal_delay_length_minus1, 23);

  286.             infer(au_cpb_removal_delay_length_minus1,      23);

  287.             infer(dpb_output_delay_length_minus1,          23);

  288.         }

  289.     }

  290. 

  291.     for (i = 0; i <= max_num_sub_layers_minus1; i++) {

  292.         flags(fixed_pic_rate_general_flag[i], 1, i);

  293. 

  294.         if (!current->fixed_pic_rate_general_flag[i])

  295.             flags(fixed_pic_rate_within_cvs_flag[i], 1, i);

  296.         else

  297.             infer(fixed_pic_rate_within_cvs_flag[i], 1);

  298. 

  299.         if (current->fixed_pic_rate_within_cvs_flag[i]) {

  300.             ues(elemental_duration_in_tc_minus1[i], 0, 2047, 1, i);

  301.             infer(low_delay_hrd_flag[i], 0);

  302.         } else

  303.             flags(low_delay_hrd_flag[i], 1, i);

  304. 

  305.         if (!current->low_delay_hrd_flag[i])

  306.             ues(cpb_cnt_minus1[i], 0, 31, 1, i);

  307.         else

  308.             infer(cpb_cnt_minus1[i], 0);

  309. 

  310.         if (current->nal_hrd_parameters_present_flag)

  311.             CHECK(FUNC(sub_layer_hrd_parameters)(ctx, rw, current, 0, i));

  312.         if (current->vcl_hrd_parameters_present_flag)

  313.             CHECK(FUNC(sub_layer_hrd_parameters)(ctx, rw, current, 1, i));

  314.     }

  315. 

  316.     return 0;

  317. }

  318. 

  319. static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw,

  320.                                 H265RawVUI *current, const H265RawSPS *sps)

  321. {

  322.     int err;

  323. 

  324.     flag(aspect_ratio_info_present_flag);

  325.     if (current->aspect_ratio_info_present_flag) {

  326.         ub(8, aspect_ratio_idc);

  327.         if (current->aspect_ratio_idc == 255) {

  328.             ub(16, sar_width);

  329.             ub(16, sar_height);

  330.         }

  331.     } else {

  332.         infer(aspect_ratio_idc, 0);

  333.     }

  334. 

  335.     flag(overscan_info_present_flag);

  336.     if (current->overscan_info_present_flag)

  337.         flag(overscan_appropriate_flag);

  338. 

  339.     flag(video_signal_type_present_flag);

  340.     if (current->video_signal_type_present_flag) {

  341.         ub(3, video_format);

  342.         flag(video_full_range_flag);

  343.         flag(colour_description_present_flag);

  344.         if (current->colour_description_present_flag) {

  345.             ub(8, colour_primaries);

  346.             ub(8, transfer_characteristics);

  347.             ub(8, matrix_coefficients);

  348.         } else {

  349.             infer(colour_primaries,         2);

  350.             infer(transfer_characteristics, 2);

  351.             infer(matrix_coefficients,      2);

  352.         }

  353.     } else {

  354.         infer(video_format,             5);

  355.         infer(video_full_range_flag,    0);

  356.         infer(colour_primaries,         2);

  357.         infer(transfer_characteristics, 2);

  358.         infer(matrix_coefficients,      2);

  359.     }

  360. 

  361.     flag(chroma_loc_info_present_flag);

  362.     if (current->chroma_loc_info_present_flag) {

  363.         ue(chroma_sample_loc_type_top_field,    0, 5);

  364.         ue(chroma_sample_loc_type_bottom_field, 0, 5);

  365.     } else {

  366.         infer(chroma_sample_loc_type_top_field,    0);

  367.         infer(chroma_sample_loc_type_bottom_field, 0);

  368.     }

  369. 

  370.     flag(neutral_chroma_indication_flag);

  371.     flag(field_seq_flag);

  372.     flag(frame_field_info_present_flag);

  373. 

  374.     flag(default_display_window_flag);

  375.     if (current->default_display_window_flag) {

  376.         ue(def_disp_win_left_offset,   0, 16384);

  377.         ue(def_disp_win_right_offset,  0, 16384);

  378.         ue(def_disp_win_top_offset,    0, 16384);

  379.         ue(def_disp_win_bottom_offset, 0, 16384);

  380.     }

  381. 

  382.     flag(vui_timing_info_present_flag);

  383.     if (current->vui_timing_info_present_flag) {

  384.         u(32, vui_num_units_in_tick, 1, UINT32_MAX);

  385.         u(32, vui_time_scale,        1, UINT32_MAX);

  386.         flag(vui_poc_proportional_to_timing_flag);

  387.         if (current->vui_poc_proportional_to_timing_flag)

  388.             ue(vui_num_ticks_poc_diff_one_minus1, 0, UINT32_MAX - 1);

  389. 

  390.         flag(vui_hrd_parameters_present_flag);

  391.         if (current->vui_hrd_parameters_present_flag) {

  392.             CHECK(FUNC(hrd_parameters)(ctx, rw, &current->hrd_parameters,

  393.                                        1, sps->sps_max_sub_layers_minus1));

  394.         }

  395.     }

  396. 

  397.     flag(bitstream_restriction_flag);

  398.     if (current->bitstream_restriction_flag) {

  399.         flag(tiles_fixed_structure_flag);

  400.         flag(motion_vectors_over_pic_boundaries_flag);

  401.         flag(restricted_ref_pic_lists_flag);

  402.         ue(min_spatial_segmentation_idc,  0, 4095);

  403.         ue(max_bytes_per_pic_denom,       0, 16);

  404.         ue(max_bits_per_min_cu_denom,     0, 16);

  405.         ue(log2_max_mv_length_horizontal, 0, 16);

  406.         ue(log2_max_mv_length_vertical,   0, 16);

  407.     } else {

  408.         infer(tiles_fixed_structure_flag,    0);

  409.         infer(motion_vectors_over_pic_boundaries_flag, 1);

  410.         infer(min_spatial_segmentation_idc,  0);

  411.         infer(max_bytes_per_pic_denom,       2);

  412.         infer(max_bits_per_min_cu_denom,     1);

  413.         infer(log2_max_mv_length_horizontal, 15);

  414.         infer(log2_max_mv_length_vertical,   15);

  415.     }

  416. 

  417.     return 0;

  418. }

  419. 

  420. static int FUNC(vps)(CodedBitstreamContext *ctx, RWContext *rw,

  421.                      H265RawVPS *current)

  422. {

  423.     int err, i, j;

  424. 

  425.     HEADER("Video Parameter Set");

  426. 

  427.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_VPS));

  428. 

  429.     ub(4, vps_video_parameter_set_id);

  430. 

  431.     flag(vps_base_layer_internal_flag);

  432.     flag(vps_base_layer_available_flag);

  433.     u(6, vps_max_layers_minus1,     0, HEVC_MAX_LAYERS - 1);

  434.     u(3, vps_max_sub_layers_minus1, 0, HEVC_MAX_SUB_LAYERS - 1);

  435.     flag(vps_temporal_id_nesting_flag);

  436. 

  437.     if (current->vps_max_sub_layers_minus1 == 0 &&

  438.         current->vps_temporal_id_nesting_flag != 1) {

  439.         av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "

  440.                "vps_temporal_id_nesting_flag must be 1 if "

  441.                "vps_max_sub_layers_minus1 is 0.\n");

  442.         return AVERROR_INVALIDDATA;

  443.     }

  444. 

  445.     fixed(16, vps_reserved_0xffff_16bits, 0xffff);

  446. 

  447.     CHECK(FUNC(profile_tier_level)(ctx, rw, &current->profile_tier_level,

  448.                                    1, current->vps_max_sub_layers_minus1));

  449. 

  450.     flag(vps_sub_layer_ordering_info_present_flag);

  451.     for (i = (current->vps_sub_layer_ordering_info_present_flag ?

  452.               0 : current->vps_max_sub_layers_minus1);

  453.          i <= current->vps_max_sub_layers_minus1; i++) {

  454.         ues(vps_max_dec_pic_buffering_minus1[i],

  455.             0, HEVC_MAX_DPB_SIZE - 1,                        1, i);

  456.         ues(vps_max_num_reorder_pics[i],

  457.             0, current->vps_max_dec_pic_buffering_minus1[i], 1, i);

  458.         ues(vps_max_latency_increase_plus1[i],

  459.             0, UINT32_MAX - 1,                               1, i);

  460.     }

  461.     if (!current->vps_sub_layer_ordering_info_present_flag) {

  462.         for (i = 0; i < current->vps_max_sub_layers_minus1; i++) {

  463.             infer(vps_max_dec_pic_buffering_minus1[i],

  464.                   current->vps_max_dec_pic_buffering_minus1[current->vps_max_sub_layers_minus1]);

  465.             infer(vps_max_num_reorder_pics[i],

  466.                   current->vps_max_num_reorder_pics[current->vps_max_sub_layers_minus1]);

  467.             infer(vps_max_latency_increase_plus1[i],

  468.                   current->vps_max_latency_increase_plus1[current->vps_max_sub_layers_minus1]);

  469.         }

  470.     }

  471. 

  472.     u(6, vps_max_layer_id,        0, HEVC_MAX_LAYERS - 1);

  473.     ue(vps_num_layer_sets_minus1, 0, HEVC_MAX_LAYER_SETS - 1);

  474.     for (i = 1; i <= current->vps_num_layer_sets_minus1; i++) {

  475.         for (j = 0; j <= current->vps_max_layer_id; j++)

  476.             flags(layer_id_included_flag[i][j], 2, i, j);

  477.     }

  478.     for (j = 0; j <= current->vps_max_layer_id; j++)

  479.         infer(layer_id_included_flag[0][j], j == 0);

  480. 

  481.     flag(vps_timing_info_present_flag);

  482.     if (current->vps_timing_info_present_flag) {

  483.         u(32, vps_num_units_in_tick, 1, UINT32_MAX);

  484.         u(32, vps_time_scale,        1, UINT32_MAX);

  485.         flag(vps_poc_proportional_to_timing_flag);

  486.         if (current->vps_poc_proportional_to_timing_flag)

  487.             ue(vps_num_ticks_poc_diff_one_minus1, 0, UINT32_MAX - 1);

  488.         ue(vps_num_hrd_parameters, 0, current->vps_num_layer_sets_minus1 + 1);

  489.         for (i = 0; i < current->vps_num_hrd_parameters; i++) {

  490.             ues(hrd_layer_set_idx[i],

  491.                 current->vps_base_layer_internal_flag ? 0 : 1,

  492.                 current->vps_num_layer_sets_minus1, 1, i);

  493.             if (i > 0)

  494.                 flags(cprms_present_flag[i], 1, i);

  495.             else

  496.                 infer(cprms_present_flag[0], 1);

  497. 

  498.             CHECK(FUNC(hrd_parameters)(ctx, rw, &current->hrd_parameters[i],

  499.                                        current->cprms_present_flag[i],

  500.                                        current->vps_max_sub_layers_minus1));

  501.         }

  502.     }

  503. 

  504.     flag(vps_extension_flag);

  505.     if (current->vps_extension_flag)

  506.         CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));

  507. 

  508.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  509. 

  510.     return 0;

  511. }

  512. 

  513. static int FUNC(st_ref_pic_set)(CodedBitstreamContext *ctx, RWContext *rw,

  514.                                 H265RawSTRefPicSet *current, int st_rps_idx,

  515.                                 const H265RawSPS *sps)

  516. {

  517.     int err, i, j;

  518. 

  519.     if (st_rps_idx != 0)

  520.         flag(inter_ref_pic_set_prediction_flag);

  521.     else

  522.         infer(inter_ref_pic_set_prediction_flag, 0);

  523. 

  524.     if (current->inter_ref_pic_set_prediction_flag) {

  525.         unsigned int ref_rps_idx, num_delta_pocs;

  526.         const H265RawSTRefPicSet *ref;

  527.         int delta_rps, d_poc;

  528.         int ref_delta_poc_s0[HEVC_MAX_REFS], ref_delta_poc_s1[HEVC_MAX_REFS];

  529.         int delta_poc_s0[HEVC_MAX_REFS], delta_poc_s1[HEVC_MAX_REFS];

  530.         uint8_t used_by_curr_pic_s0[HEVC_MAX_REFS],

  531.                 used_by_curr_pic_s1[HEVC_MAX_REFS];

  532. 

  533.         if (st_rps_idx == sps->num_short_term_ref_pic_sets)

  534.             ue(delta_idx_minus1, 0, st_rps_idx - 1);

  535.         else

  536.             infer(delta_idx_minus1, 0);

  537. 

  538.         ref_rps_idx = st_rps_idx - (current->delta_idx_minus1 + 1);

  539.         ref = &sps->st_ref_pic_set[ref_rps_idx];

  540.         num_delta_pocs = ref->num_negative_pics + ref->num_positive_pics;

  541. 

  542.         flag(delta_rps_sign);

  543.         ue(abs_delta_rps_minus1, 0, INT16_MAX);

  544.         delta_rps = (1 - 2 * current->delta_rps_sign) *

  545.             (current->abs_delta_rps_minus1 + 1);

  546. 

  547.         for (j = 0; j <= num_delta_pocs; j++) {

  548.             flags(used_by_curr_pic_flag[j], 1, j);

  549.             if (!current->used_by_curr_pic_flag[j])

  550.                 flags(use_delta_flag[j], 1, j);

  551.             else

  552.                 infer(use_delta_flag[j], 1);

  553.         }

  554. 

  555.         // Since the stored form of an RPS here is actually the delta-step

  556.         // form used when inter_ref_pic_set_prediction_flag is not set, we

  557.         // need to reconstruct that here in order to be able to refer to

  558.         // the RPS later (which is required for parsing, because we don't

  559.         // even know what syntax elements appear without it).  Therefore,

  560.         // this code takes the delta-step form of the reference set, turns

  561.         // it into the delta-array form, applies the prediction process of

  562.         // 7.4.8, converts the result back to the delta-step form, and

  563.         // stores that as the current set for future use.  Note that the

  564.         // inferences here mean that writers using prediction will need

  565.         // to fill in the delta-step values correctly as well - since the

  566.         // whole RPS prediction process is somewhat overly sophisticated,

  567.         // this hopefully forms a useful check for them to ensure their

  568.         // predicted form actually matches what was intended rather than

  569.         // an onerous additional requirement.

  570. 

  571.         d_poc = 0;

  572.         for (i = 0; i < ref->num_negative_pics; i++) {

  573.             d_poc -= ref->delta_poc_s0_minus1[i] + 1;

  574.             ref_delta_poc_s0[i] = d_poc;

  575.         }

  576.         d_poc = 0;

  577.         for (i = 0; i < ref->num_positive_pics; i++) {

  578.             d_poc += ref->delta_poc_s1_minus1[i] + 1;

  579.             ref_delta_poc_s1[i] = d_poc;

  580.         }

  581. 

  582.         i = 0;

  583.         for (j = ref->num_positive_pics - 1; j >= 0; j--) {

  584.             d_poc = ref_delta_poc_s1[j] + delta_rps;

  585.             if (d_poc < 0 && current->use_delta_flag[ref->num_negative_pics + j]) {

  586.                 delta_poc_s0[i] = d_poc;

  587.                 used_by_curr_pic_s0[i++] =

  588.                     current->used_by_curr_pic_flag[ref->num_negative_pics + j];

  589.             }

  590.         }

  591.         if (delta_rps < 0 && current->use_delta_flag[num_delta_pocs]) {

  592.             delta_poc_s0[i] = delta_rps;

  593.             used_by_curr_pic_s0[i++] =

  594.                 current->used_by_curr_pic_flag[num_delta_pocs];

  595.         }

  596.         for (j = 0; j < ref->num_negative_pics; j++) {

  597.             d_poc = ref_delta_poc_s0[j] + delta_rps;

  598.             if (d_poc < 0 && current->use_delta_flag[j]) {

  599.                 delta_poc_s0[i] = d_poc;

  600.                 used_by_curr_pic_s0[i++] = current->used_by_curr_pic_flag[j];

  601.             }

  602.         }

  603. 

  604.         if (i > 15)

  605.             return AVERROR_INVALIDDATA;

  606.         infer(num_negative_pics, i);

  607.         for (i = 0; i < current->num_negative_pics; i++) {

  608.             infer(delta_poc_s0_minus1[i],

  609.                   -(delta_poc_s0[i] - (i == 0 ? 0 : delta_poc_s0[i - 1])) - 1);

  610.             infer(used_by_curr_pic_s0_flag[i], used_by_curr_pic_s0[i]);

  611.         }

  612. 

  613.         i = 0;

  614.         for (j = ref->num_negative_pics - 1; j >= 0; j--) {

  615.             d_poc = ref_delta_poc_s0[j] + delta_rps;

  616.             if (d_poc > 0 && current->use_delta_flag[j]) {

  617.                 delta_poc_s1[i] = d_poc;

  618.                 used_by_curr_pic_s1[i++] = current->used_by_curr_pic_flag[j];

  619.             }

  620.         }

  621.         if (delta_rps > 0 && current->use_delta_flag[num_delta_pocs]) {

  622.             delta_poc_s1[i] = delta_rps;

  623.             used_by_curr_pic_s1[i++] =

  624.                 current->used_by_curr_pic_flag[num_delta_pocs];

  625.         }

  626.         for (j = 0; j < ref->num_positive_pics; j++) {

  627.             d_poc = ref_delta_poc_s1[j] + delta_rps;

  628.             if (d_poc > 0 && current->use_delta_flag[ref->num_negative_pics + j]) {

  629.                 delta_poc_s1[i] = d_poc;

  630.                 used_by_curr_pic_s1[i++] =

  631.                     current->used_by_curr_pic_flag[ref->num_negative_pics + j];

  632.             }

  633.         }

  634. 

  635.         if (i + current->num_negative_pics > 15)

  636.             return AVERROR_INVALIDDATA;

  637.         infer(num_positive_pics, i);

  638.         for (i = 0; i < current->num_positive_pics; i++) {

  639.             infer(delta_poc_s1_minus1[i],

  640.                   delta_poc_s1[i] - (i == 0 ? 0 : delta_poc_s1[i - 1]) - 1);

  641.             infer(used_by_curr_pic_s1_flag[i], used_by_curr_pic_s1[i]);

  642.         }

  643. 

  644.     } else {

  645.         ue(num_negative_pics, 0, 15);

  646.         ue(num_positive_pics, 0, 15 - current->num_negative_pics);

  647. 

  648.         for (i = 0; i < current->num_negative_pics; i++) {

  649.             ues(delta_poc_s0_minus1[i], 0, INT16_MAX, 1, i);

  650.             flags(used_by_curr_pic_s0_flag[i],        1, i);

  651.         }

  652. 

  653.         for (i = 0; i < current->num_positive_pics; i++) {

  654.             ues(delta_poc_s1_minus1[i], 0, INT16_MAX, 1, i);

  655.             flags(used_by_curr_pic_s1_flag[i],        1, i);

  656.         }

  657.     }

  658. 

  659.     return 0;

  660. }

  661. 

  662. static int FUNC(scaling_list_data)(CodedBitstreamContext *ctx, RWContext *rw,

  663.                                    H265RawScalingList *current)

  664. {

  665.     int sizeId, matrixId;

  666.     int err, n, i;

  667. 

  668.     for (sizeId = 0; sizeId < 4; sizeId++) {

  669.         for (matrixId = 0; matrixId < 6; matrixId += (sizeId == 3 ? 3 : 1)) {

  670.             flags(scaling_list_pred_mode_flag[sizeId][matrixId],

  671.                   2, sizeId, matrixId);

  672.             if (!current->scaling_list_pred_mode_flag[sizeId][matrixId]) {

  673.                 ues(scaling_list_pred_matrix_id_delta[sizeId][matrixId],

  674.                     0, sizeId == 3 ? matrixId / 3 : matrixId,

  675.                     2, sizeId, matrixId);

  676.             } else {

  677.                 n = FFMIN(64, 1 << (4 + (sizeId << 1)));

  678.                 if (sizeId > 1) {

  679.                     ses(scaling_list_dc_coef_minus8[sizeId - 2][matrixId], -7, +247,

  680.                         2, sizeId - 2, matrixId);

  681.                 }

  682.                 for (i = 0; i < n; i++) {

  683.                     ses(scaling_list_delta_coeff[sizeId][matrixId][i],

  684.                         -128, +127, 3, sizeId, matrixId, i);

  685.                 }

  686.             }

  687.         }

  688.     }

  689. 

  690.     return 0;

  691. }

  692. 

  693. static int FUNC(sps_range_extension)(CodedBitstreamContext *ctx, RWContext *rw,

  694.                                      H265RawSPS *current)

  695. {

  696.     int err;

  697. 

  698.     flag(transform_skip_rotation_enabled_flag);

  699.     flag(transform_skip_context_enabled_flag);

  700.     flag(implicit_rdpcm_enabled_flag);

  701.     flag(explicit_rdpcm_enabled_flag);

  702.     flag(extended_precision_processing_flag);

  703.     flag(intra_smoothing_disabled_flag);

  704.     flag(high_precision_offsets_enabled_flag);

  705.     flag(persistent_rice_adaptation_enabled_flag);

  706.     flag(cabac_bypass_alignment_enabled_flag);

  707. 

  708.     return 0;

  709. }

  710. 

  711. static int FUNC(sps_scc_extension)(CodedBitstreamContext *ctx, RWContext *rw,

  712.                                    H265RawSPS *current)

  713. {

  714.     int err, comp, i;

  715. 

  716.     flag(sps_curr_pic_ref_enabled_flag);

  717. 

  718.     flag(palette_mode_enabled_flag);

  719.     if (current->palette_mode_enabled_flag) {

  720.         ue(palette_max_size, 0, 64);

  721.         ue(delta_palette_max_predictor_size, 0, 128);

  722. 

  723.         flag(sps_palette_predictor_initializer_present_flag);

  724.         if (current->sps_palette_predictor_initializer_present_flag) {

  725.             ue(sps_num_palette_predictor_initializer_minus1, 0, 128);

  726.             for (comp = 0; comp < (current->chroma_format_idc ? 3 : 1); comp++) {

  727.                 int bit_depth = comp == 0 ? current->bit_depth_luma_minus8 + 8

  728.                                           : current->bit_depth_chroma_minus8 + 8;

  729.                 for (i = 0; i <= current->sps_num_palette_predictor_initializer_minus1; i++)

  730.                     ubs(bit_depth, sps_palette_predictor_initializers[comp][i], 2, comp, i);

  731.             }

  732.         }

  733.     }

  734. 

  735.     u(2, motion_vector_resolution_control_idc, 0, 2);

  736.     flag(intra_boundary_filtering_disable_flag);

  737. 

  738.     return 0;

  739. }

  740. 

  741. static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,

  742.                      H265RawSPS *current)

  743. {

  744.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  745.     const H265RawVPS *vps;

  746.     int err, i;

  747.     unsigned int min_cb_log2_size_y, ctb_log2_size_y,

  748.                  min_cb_size_y,   min_tb_log2_size_y;

  749. 

  750.     HEADER("Sequence Parameter Set");

  751. 

  752.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_SPS));

  753. 

  754.     ub(4, sps_video_parameter_set_id);

  755.     h265->active_vps = vps = h265->vps[current->sps_video_parameter_set_id];

  756. 

  757.     u(3, sps_max_sub_layers_minus1, 0, HEVC_MAX_SUB_LAYERS - 1);

  758.     flag(sps_temporal_id_nesting_flag);

  759.     if (vps) {

  760.         if (vps->vps_max_sub_layers_minus1 > current->sps_max_sub_layers_minus1) {

  761.             av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "

  762.                    "sps_max_sub_layers_minus1 (%d) must be less than or equal to "

  763.                    "vps_max_sub_layers_minus1 (%d).\n",

  764.                    vps->vps_max_sub_layers_minus1,

  765.                    current->sps_max_sub_layers_minus1);

  766.             return AVERROR_INVALIDDATA;

  767.         }

  768.         if (vps->vps_temporal_id_nesting_flag &&

  769.             !current->sps_temporal_id_nesting_flag) {

  770.             av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "

  771.                    "sps_temporal_id_nesting_flag must be 1 if "

  772.                    "vps_temporal_id_nesting_flag is 1.\n");

  773.             return AVERROR_INVALIDDATA;

  774.         }

  775.     }

  776. 

  777.     CHECK(FUNC(profile_tier_level)(ctx, rw, &current->profile_tier_level,

  778.                                    1, current->sps_max_sub_layers_minus1));

  779. 

  780.     ue(sps_seq_parameter_set_id, 0, 15);

  781. 

  782.     ue(chroma_format_idc, 0, 3);

  783.     if (current->chroma_format_idc == 3)

  784.         flag(separate_colour_plane_flag);

  785.     else

  786.         infer(separate_colour_plane_flag, 0);

  787. 

  788.     ue(pic_width_in_luma_samples,  1, HEVC_MAX_WIDTH);

  789.     ue(pic_height_in_luma_samples, 1, HEVC_MAX_HEIGHT);

  790. 

  791.     flag(conformance_window_flag);

  792.     if (current->conformance_window_flag) {

  793.         ue(conf_win_left_offset,   0, current->pic_width_in_luma_samples);

  794.         ue(conf_win_right_offset,  0, current->pic_width_in_luma_samples);

  795.         ue(conf_win_top_offset,    0, current->pic_height_in_luma_samples);

  796.         ue(conf_win_bottom_offset, 0, current->pic_height_in_luma_samples);

  797.     } else {

  798.         infer(conf_win_left_offset,   0);

  799.         infer(conf_win_right_offset,  0);

  800.         infer(conf_win_top_offset,    0);

  801.         infer(conf_win_bottom_offset, 0);

  802.     }

  803. 

  804.     ue(bit_depth_luma_minus8,   0, 8);

  805.     ue(bit_depth_chroma_minus8, 0, 8);

  806. 

  807.     ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12);

  808. 

  809.     flag(sps_sub_layer_ordering_info_present_flag);

  810.     for (i = (current->sps_sub_layer_ordering_info_present_flag ?

  811.               0 : current->sps_max_sub_layers_minus1);

  812.          i <= current->sps_max_sub_layers_minus1; i++) {

  813.         ues(sps_max_dec_pic_buffering_minus1[i],

  814.             0, HEVC_MAX_DPB_SIZE - 1,                        1, i);

  815.         ues(sps_max_num_reorder_pics[i],

  816.             0, current->sps_max_dec_pic_buffering_minus1[i], 1, i);

  817.         ues(sps_max_latency_increase_plus1[i],

  818.             0, UINT32_MAX - 1,                               1, i);

  819.     }

  820.     if (!current->sps_sub_layer_ordering_info_present_flag) {

  821.         for (i = 0; i < current->sps_max_sub_layers_minus1; i++) {

  822.             infer(sps_max_dec_pic_buffering_minus1[i],

  823.                   current->sps_max_dec_pic_buffering_minus1[current->sps_max_sub_layers_minus1]);

  824.             infer(sps_max_num_reorder_pics[i],

  825.                   current->sps_max_num_reorder_pics[current->sps_max_sub_layers_minus1]);

  826.             infer(sps_max_latency_increase_plus1[i],

  827.                   current->sps_max_latency_increase_plus1[current->sps_max_sub_layers_minus1]);

  828.         }

  829.     }

  830. 

  831.     ue(log2_min_luma_coding_block_size_minus3,   0, 3);

  832.     min_cb_log2_size_y = current->log2_min_luma_coding_block_size_minus3 + 3;

  833. 

  834.     ue(log2_diff_max_min_luma_coding_block_size, 0, 3);

  835.     ctb_log2_size_y = min_cb_log2_size_y +

  836.         current->log2_diff_max_min_luma_coding_block_size;

  837. 

  838.     min_cb_size_y = 1 << min_cb_log2_size_y;

  839.     if (current->pic_width_in_luma_samples  % min_cb_size_y ||

  840.         current->pic_height_in_luma_samples % min_cb_size_y) {

  841.         av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid dimensions: %ux%u not divisible "

  842.                "by MinCbSizeY = %u.\n", current->pic_width_in_luma_samples,

  843.                current->pic_height_in_luma_samples, min_cb_size_y);

  844.         return AVERROR_INVALIDDATA;

  845.     }

  846. 

  847.     ue(log2_min_luma_transform_block_size_minus2, 0, min_cb_log2_size_y - 3);

  848.     min_tb_log2_size_y = current->log2_min_luma_transform_block_size_minus2 + 2;

  849. 

  850.     ue(log2_diff_max_min_luma_transform_block_size,

  851.        0, FFMIN(ctb_log2_size_y, 5) - min_tb_log2_size_y);

  852. 

  853.     ue(max_transform_hierarchy_depth_inter,

  854.        0, ctb_log2_size_y - min_tb_log2_size_y);

  855.     ue(max_transform_hierarchy_depth_intra,

  856.        0, ctb_log2_size_y - min_tb_log2_size_y);

  857. 

  858.     flag(scaling_list_enabled_flag);

  859.     if (current->scaling_list_enabled_flag) {

  860.         flag(sps_scaling_list_data_present_flag);

  861.         if (current->sps_scaling_list_data_present_flag)

  862.             CHECK(FUNC(scaling_list_data)(ctx, rw, &current->scaling_list));

  863.     } else {

  864.         infer(sps_scaling_list_data_present_flag, 0);

  865.     }

  866. 

  867.     flag(amp_enabled_flag);

  868.     flag(sample_adaptive_offset_enabled_flag);

  869. 

  870.     flag(pcm_enabled_flag);

  871.     if (current->pcm_enabled_flag) {

  872.         u(4, pcm_sample_bit_depth_luma_minus1,

  873.           0, current->bit_depth_luma_minus8 + 8 - 1);

  874.         u(4, pcm_sample_bit_depth_chroma_minus1,

  875.           0, current->bit_depth_chroma_minus8 + 8 - 1);

  876. 

  877.         ue(log2_min_pcm_luma_coding_block_size_minus3,

  878.            FFMIN(min_cb_log2_size_y, 5) - 3, FFMIN(ctb_log2_size_y, 5) - 3);

  879.         ue(log2_diff_max_min_pcm_luma_coding_block_size,

  880.            0, FFMIN(ctb_log2_size_y, 5) - (current->log2_min_pcm_luma_coding_block_size_minus3 + 3));

  881. 

  882.         flag(pcm_loop_filter_disabled_flag);

  883.     }

  884. 

  885.     ue(num_short_term_ref_pic_sets, 0, HEVC_MAX_SHORT_TERM_REF_PIC_SETS);

  886.     for (i = 0; i < current->num_short_term_ref_pic_sets; i++)

  887.         CHECK(FUNC(st_ref_pic_set)(ctx, rw, &current->st_ref_pic_set[i], i, current));

  888. 

  889.     flag(long_term_ref_pics_present_flag);

  890.     if (current->long_term_ref_pics_present_flag) {

  891.         ue(num_long_term_ref_pics_sps, 0, HEVC_MAX_LONG_TERM_REF_PICS);

  892.         for (i = 0; i < current->num_long_term_ref_pics_sps; i++) {

  893.             ubs(current->log2_max_pic_order_cnt_lsb_minus4 + 4,

  894.                 lt_ref_pic_poc_lsb_sps[i], 1, i);

  895.             flags(used_by_curr_pic_lt_sps_flag[i], 1, i);

  896.         }

  897.     }

  898. 

  899.     flag(sps_temporal_mvp_enabled_flag);

  900.     flag(strong_intra_smoothing_enabled_flag);

  901. 

  902.     flag(vui_parameters_present_flag);

  903.     if (current->vui_parameters_present_flag)

  904.         CHECK(FUNC(vui_parameters)(ctx, rw, &current->vui, current));

  905. 

  906.     flag(sps_extension_present_flag);

  907.     if (current->sps_extension_present_flag) {

  908.         flag(sps_range_extension_flag);

  909.         flag(sps_multilayer_extension_flag);

  910.         flag(sps_3d_extension_flag);

  911.         flag(sps_scc_extension_flag);

  912.         ub(4, sps_extension_4bits);

  913.     }

  914. 

  915.     if (current->sps_range_extension_flag)

  916.         CHECK(FUNC(sps_range_extension)(ctx, rw, current));

  917.     if (current->sps_multilayer_extension_flag)

  918.         return AVERROR_PATCHWELCOME;

  919.     if (current->sps_3d_extension_flag)

  920.         return AVERROR_PATCHWELCOME;

  921.     if (current->sps_scc_extension_flag)

  922.         CHECK(FUNC(sps_scc_extension)(ctx, rw, current));

  923.     if (current->sps_extension_4bits)

  924.         CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));

  925. 

  926.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  927. 

  928.     return 0;

  929. }

  930. 

  931. static int FUNC(pps_range_extension)(CodedBitstreamContext *ctx, RWContext *rw,

  932.                                      H265RawPPS *current)

  933. {

  934.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  935.     const H265RawSPS *sps = h265->active_sps;

  936.     int err, i;

  937. 

  938.     if (current->transform_skip_enabled_flag)

  939.         ue(log2_max_transform_skip_block_size_minus2, 0, 3);

  940.     flag(cross_component_prediction_enabled_flag);

  941. 

  942.     flag(chroma_qp_offset_list_enabled_flag);

  943.     if (current->chroma_qp_offset_list_enabled_flag) {

  944.         ue(diff_cu_chroma_qp_offset_depth,

  945.            0, sps->log2_diff_max_min_luma_coding_block_size);

  946.         ue(chroma_qp_offset_list_len_minus1, 0, 5);

  947.         for (i = 0; i <= current->chroma_qp_offset_list_len_minus1; i++) {

  948.             ses(cb_qp_offset_list[i], -12, +12, 1, i);

  949.             ses(cr_qp_offset_list[i], -12, +12, 1, i);

  950.         }

  951.     }

  952. 

  953.     ue(log2_sao_offset_scale_luma,   0, FFMAX(0, sps->bit_depth_luma_minus8   - 2));

  954.     ue(log2_sao_offset_scale_chroma, 0, FFMAX(0, sps->bit_depth_chroma_minus8 - 2));

  955. 

  956.     return 0;

  957. }

  958. 

  959. static int FUNC(pps_scc_extension)(CodedBitstreamContext *ctx, RWContext *rw,

  960.                                    H265RawPPS *current)

  961. {

  962.     int err, comp, i;

  963. 

  964.     flag(pps_curr_pic_ref_enabled_flag);

  965. 

  966.     flag(residual_adaptive_colour_transform_enabled_flag);

  967.     if (current->residual_adaptive_colour_transform_enabled_flag) {

  968.         flag(pps_slice_act_qp_offsets_present_flag);

  969.         se(pps_act_y_qp_offset_plus5,  -7, +17);

  970.         se(pps_act_cb_qp_offset_plus5, -7, +17);

  971.         se(pps_act_cr_qp_offset_plus3, -9, +15);

  972.     } else {

  973.         infer(pps_slice_act_qp_offsets_present_flag, 0);

  974.         infer(pps_act_y_qp_offset_plus5,  0);

  975.         infer(pps_act_cb_qp_offset_plus5, 0);

  976.         infer(pps_act_cr_qp_offset_plus3, 0);

  977.     }

  978. 

  979.     flag(pps_palette_predictor_initializer_present_flag);

  980.     if (current->pps_palette_predictor_initializer_present_flag) {

  981.         ue(pps_num_palette_predictor_initializer, 0, 128);

  982.         if (current->pps_num_palette_predictor_initializer > 0) {

  983.             flag(monochrome_palette_flag);

  984.             ue(luma_bit_depth_entry_minus8, 0, 8);

  985.             if (!current->monochrome_palette_flag)

  986.                 ue(chroma_bit_depth_entry_minus8, 0, 8);

  987.             for (comp = 0; comp < (current->monochrome_palette_flag ? 1 : 3); comp++) {

  988.                 int bit_depth = comp == 0 ? current->luma_bit_depth_entry_minus8 + 8

  989.                                           : current->chroma_bit_depth_entry_minus8 + 8;

  990.                 for (i = 0; i < current->pps_num_palette_predictor_initializer; i++)

  991.                     ubs(bit_depth, pps_palette_predictor_initializers[comp][i], 2, comp, i);

  992.             }

  993.         }

  994.     }

  995. 

  996.     return 0;

  997. }

  998. 

  999. static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw,

  1000.                      H265RawPPS *current)

  1001. {

  1002.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  1003.     const H265RawSPS *sps;

  1004.     int err, i;

  1005. 

  1006.     HEADER("Picture Parameter Set");

  1007. 

  1008.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_PPS));

  1009. 

  1010.     ue(pps_pic_parameter_set_id, 0, 63);

  1011.     ue(pps_seq_parameter_set_id, 0, 15);

  1012.     sps = h265->sps[current->pps_seq_parameter_set_id];

  1013.     if (!sps) {

  1014.         av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",

  1015.                current->pps_seq_parameter_set_id);

  1016.         return AVERROR_INVALIDDATA;

  1017.     }

  1018.     h265->active_sps = sps;

  1019. 

  1020.     flag(dependent_slice_segments_enabled_flag);

  1021.     flag(output_flag_present_flag);

  1022.     ub(3, num_extra_slice_header_bits);

  1023.     flag(sign_data_hiding_enabled_flag);

  1024.     flag(cabac_init_present_flag);

  1025. 

  1026.     ue(num_ref_idx_l0_default_active_minus1, 0, 14);

  1027.     ue(num_ref_idx_l1_default_active_minus1, 0, 14);

  1028. 

  1029.     se(init_qp_minus26, -(26 + 6 * sps->bit_depth_luma_minus8), +25);

  1030. 

  1031.     flag(constrained_intra_pred_flag);

  1032.     flag(transform_skip_enabled_flag);

  1033.     flag(cu_qp_delta_enabled_flag);

  1034.     if (current->cu_qp_delta_enabled_flag)

  1035.         ue(diff_cu_qp_delta_depth,

  1036.            0, sps->log2_diff_max_min_luma_coding_block_size);

  1037.     else

  1038.         infer(diff_cu_qp_delta_depth, 0);

  1039. 

  1040.     se(pps_cb_qp_offset, -12, +12);

  1041.     se(pps_cr_qp_offset, -12, +12);

  1042.     flag(pps_slice_chroma_qp_offsets_present_flag);

  1043. 

  1044.     flag(weighted_pred_flag);

  1045.     flag(weighted_bipred_flag);

  1046. 

  1047.     flag(transquant_bypass_enabled_flag);

  1048.     flag(tiles_enabled_flag);

  1049.     flag(entropy_coding_sync_enabled_flag);

  1050. 

  1051.     if (current->tiles_enabled_flag) {

  1052.         ue(num_tile_columns_minus1, 0, HEVC_MAX_TILE_COLUMNS);

  1053.         ue(num_tile_rows_minus1,    0, HEVC_MAX_TILE_ROWS);

  1054.         flag(uniform_spacing_flag);

  1055.         if (!current->uniform_spacing_flag) {

  1056.             for (i = 0; i < current->num_tile_columns_minus1; i++)

  1057.                 ues(column_width_minus1[i], 0, sps->pic_width_in_luma_samples,  1, i);

  1058.             for (i = 0; i < current->num_tile_rows_minus1; i++)

  1059.                 ues(row_height_minus1[i],   0, sps->pic_height_in_luma_samples, 1, i);

  1060.         }

  1061.         flag(loop_filter_across_tiles_enabled_flag);

  1062.     } else {

  1063.         infer(num_tile_columns_minus1, 0);

  1064.         infer(num_tile_rows_minus1,    0);

  1065.     }

  1066. 

  1067.     flag(pps_loop_filter_across_slices_enabled_flag);

  1068.     flag(deblocking_filter_control_present_flag);

  1069.     if (current->deblocking_filter_control_present_flag) {

  1070.         flag(deblocking_filter_override_enabled_flag);

  1071.         flag(pps_deblocking_filter_disabled_flag);

  1072.         if (!current->pps_deblocking_filter_disabled_flag) {

  1073.             se(pps_beta_offset_div2, -6, +6);

  1074.             se(pps_tc_offset_div2,   -6, +6);

  1075.         } else {

  1076.             infer(pps_beta_offset_div2, 0);

  1077.             infer(pps_tc_offset_div2,   0);

  1078.         }

  1079.     } else {

  1080.         infer(deblocking_filter_override_enabled_flag, 0);

  1081.         infer(pps_deblocking_filter_disabled_flag,     0);

  1082.         infer(pps_beta_offset_div2, 0);

  1083.         infer(pps_tc_offset_div2,   0);

  1084.     }

  1085. 

  1086.     flag(pps_scaling_list_data_present_flag);

  1087.     if (current->pps_scaling_list_data_present_flag)

  1088.         CHECK(FUNC(scaling_list_data)(ctx, rw, &current->scaling_list));

  1089. 

  1090.     flag(lists_modification_present_flag);

  1091. 

  1092.     ue(log2_parallel_merge_level_minus2,

  1093.        0, (sps->log2_min_luma_coding_block_size_minus3 + 3 +

  1094.            sps->log2_diff_max_min_luma_coding_block_size - 2));

  1095. 

  1096.     flag(slice_segment_header_extension_present_flag);

  1097. 

  1098.     flag(pps_extension_present_flag);

  1099.     if (current->pps_extension_present_flag) {

  1100.         flag(pps_range_extension_flag);

  1101.         flag(pps_multilayer_extension_flag);

  1102.         flag(pps_3d_extension_flag);

  1103.         flag(pps_scc_extension_flag);

  1104.         ub(4, pps_extension_4bits);

  1105.     }

  1106.     if (current->pps_range_extension_flag)

  1107.         CHECK(FUNC(pps_range_extension)(ctx, rw, current));

  1108.     if (current->pps_multilayer_extension_flag)

  1109.         return AVERROR_PATCHWELCOME;

  1110.     if (current->pps_3d_extension_flag)

  1111.         return AVERROR_PATCHWELCOME;

  1112.     if (current->pps_scc_extension_flag)

  1113.         CHECK(FUNC(pps_scc_extension)(ctx, rw, current));

  1114.     if (current->pps_extension_4bits)

  1115.         CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));

  1116. 

  1117.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  1118. 

  1119.     return 0;

  1120. }

  1121. 

  1122. static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,

  1123.                      H265RawAUD *current)

  1124. {

  1125.     int err;

  1126. 

  1127.     HEADER("Access Unit Delimiter");

  1128. 

  1129.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_AUD));

  1130. 

  1131.     u(3, pic_type, 0, 2);

  1132. 

  1133.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  1134. 

  1135.     return 0;

  1136. }

  1137. 

  1138. static int FUNC(ref_pic_lists_modification)(CodedBitstreamContext *ctx, RWContext *rw,

  1139.                                             H265RawSliceHeader *current,

  1140.                                             unsigned int num_pic_total_curr)

  1141. {

  1142.     unsigned int entry_size;

  1143.     int err, i;

  1144. 

  1145.     entry_size = av_log2(num_pic_total_curr - 1) + 1;

  1146. 

  1147.     flag(ref_pic_list_modification_flag_l0);

  1148.     if (current->ref_pic_list_modification_flag_l0) {

  1149.         for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++)

  1150.             us(entry_size, list_entry_l0[i], 0, num_pic_total_curr - 1, 1, i);

  1151.     }

  1152. 

  1153.     if (current->slice_type == HEVC_SLICE_B) {

  1154.         flag(ref_pic_list_modification_flag_l1);

  1155.         if (current->ref_pic_list_modification_flag_l1) {

  1156.             for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++)

  1157.                 us(entry_size, list_entry_l1[i], 0, num_pic_total_curr - 1, 1, i);

  1158.         }

  1159.     }

  1160. 

  1161.     return 0;

  1162. }

  1163. 

  1164. static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,

  1165.                                    H265RawSliceHeader *current)

  1166. {

  1167.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  1168.     const H265RawSPS *sps = h265->active_sps;

  1169.     int err, i, j;

  1170.     int chroma = !sps->separate_colour_plane_flag &&

  1171.                   sps->chroma_format_idc != 0;

  1172. 

  1173.     ue(luma_log2_weight_denom, 0, 7);

  1174.     if (chroma)

  1175.         se(delta_chroma_log2_weight_denom, -7, 7);

  1176.     else

  1177.         infer(delta_chroma_log2_weight_denom, 0);

  1178. 

  1179.     for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {

  1180.         if (1 /* is not same POC and same layer_id */)

  1181.             flags(luma_weight_l0_flag[i], 1, i);

  1182.         else

  1183.             infer(luma_weight_l0_flag[i], 0);

  1184.     }

  1185.     if (chroma) {

  1186.         for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {

  1187.             if (1 /* is not same POC and same layer_id */)

  1188.                 flags(chroma_weight_l0_flag[i], 1, i);

  1189.             else

  1190.                 infer(chroma_weight_l0_flag[i], 0);

  1191.         }

  1192.     }

  1193. 

  1194.     for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {

  1195.         if (current->luma_weight_l0_flag[i]) {

  1196.             ses(delta_luma_weight_l0[i], -128, +127, 1, i);

  1197.             ses(luma_offset_l0[i],

  1198.                 -(1 << (sps->bit_depth_luma_minus8 + 8 - 1)),

  1199.                 ((1 << (sps->bit_depth_luma_minus8 + 8 - 1)) - 1), 1, i);

  1200.         } else {

  1201.             infer(delta_luma_weight_l0[i], 0);

  1202.             infer(luma_offset_l0[i],       0);

  1203.         }

  1204.         if (current->chroma_weight_l0_flag[i]) {

  1205.             for (j = 0; j < 2; j++) {

  1206.                 ses(delta_chroma_weight_l0[i][j], -128, +127, 2, i, j);

  1207.                 ses(chroma_offset_l0[i][j],

  1208.                     -(4 << (sps->bit_depth_chroma_minus8 + 8 - 1)),

  1209.                     ((4 << (sps->bit_depth_chroma_minus8 + 8 - 1)) - 1), 2, i, j);

  1210.             }

  1211.         } else {

  1212.             for (j = 0; j < 2; j++) {

  1213.                 infer(delta_chroma_weight_l0[i][j], 0);

  1214.                 infer(chroma_offset_l0[i][j],       0);

  1215.             }

  1216.         }

  1217.     }

  1218. 

  1219.     if (current->slice_type == HEVC_SLICE_B) {

  1220.         for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {

  1221.             if (1 /* RefPicList1[i] is not CurrPic, nor is it in a different layer */)

  1222.                 flags(luma_weight_l1_flag[i], 1, i);

  1223.             else

  1224.                 infer(luma_weight_l1_flag[i], 0);

  1225.         }

  1226.         if (chroma) {

  1227.             for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {

  1228.                 if (1 /* RefPicList1[i] is not CurrPic, nor is it in a different layer */)

  1229.                     flags(chroma_weight_l1_flag[i], 1, i);

  1230.                 else

  1231.                     infer(chroma_weight_l1_flag[i], 0);

  1232.             }

  1233.         }

  1234. 

  1235.         for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {

  1236.             if (current->luma_weight_l1_flag[i]) {

  1237.                 ses(delta_luma_weight_l1[i], -128, +127, 1, i);

  1238.                 ses(luma_offset_l1[i],

  1239.                     -(1 << (sps->bit_depth_luma_minus8 + 8 - 1)),

  1240.                     ((1 << (sps->bit_depth_luma_minus8 + 8 - 1)) - 1), 1, i);

  1241.             } else {

  1242.                 infer(delta_luma_weight_l1[i], 0);

  1243.                 infer(luma_offset_l1[i],       0);

  1244.             }

  1245.             if (current->chroma_weight_l1_flag[i]) {

  1246.                 for (j = 0; j < 2; j++) {

  1247.                     ses(delta_chroma_weight_l1[i][j], -128, +127, 2, i, j);

  1248.                     ses(chroma_offset_l1[i][j],

  1249.                         -(4 << (sps->bit_depth_chroma_minus8 + 8 - 1)),

  1250.                         ((4 << (sps->bit_depth_chroma_minus8 + 8 - 1)) - 1), 2, i, j);

  1251.                 }

  1252.             } else {

  1253.                 for (j = 0; j < 2; j++) {

  1254.                     infer(delta_chroma_weight_l1[i][j], 0);

  1255.                     infer(chroma_offset_l1[i][j],       0);

  1256.                 }

  1257.             }

  1258.         }

  1259.     }

  1260. 

  1261.     return 0;

  1262. }

  1263. 

  1264. static int FUNC(slice_segment_header)(CodedBitstreamContext *ctx, RWContext *rw,

  1265.                                       H265RawSliceHeader *current)

  1266. {

  1267.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  1268.     const H265RawSPS *sps;

  1269.     const H265RawPPS *pps;

  1270.     unsigned int min_cb_log2_size_y, ctb_log2_size_y, ctb_size_y;

  1271.     unsigned int pic_width_in_ctbs_y, pic_height_in_ctbs_y, pic_size_in_ctbs_y;

  1272.     unsigned int num_pic_total_curr = 0;

  1273.     int err, i;

  1274. 

  1275.     HEADER("Slice Segment Header");

  1276. 

  1277.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, -1));

  1278. 

  1279.     flag(first_slice_segment_in_pic_flag);

  1280. 

  1281.     if (current->nal_unit_header.nal_unit_type >= HEVC_NAL_BLA_W_LP &&

  1282.         current->nal_unit_header.nal_unit_type <= HEVC_NAL_RSV_IRAP_VCL23)

  1283.         flag(no_output_of_prior_pics_flag);

  1284. 

  1285.     ue(slice_pic_parameter_set_id, 0, 63);

  1286. 

  1287.     pps = h265->pps[current->slice_pic_parameter_set_id];

  1288.     if (!pps) {

  1289.         av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",

  1290.                current->slice_pic_parameter_set_id);

  1291.         return AVERROR_INVALIDDATA;

  1292.     }

  1293.     h265->active_pps = pps;

  1294. 

  1295.     sps = h265->sps[pps->pps_seq_parameter_set_id];

  1296.     if (!sps) {

  1297.         av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",

  1298.                pps->pps_seq_parameter_set_id);

  1299.         return AVERROR_INVALIDDATA;

  1300.     }

  1301.     h265->active_sps = sps;

  1302. 

  1303.     min_cb_log2_size_y = sps->log2_min_luma_coding_block_size_minus3 + 3;

  1304.     ctb_log2_size_y = min_cb_log2_size_y + sps->log2_diff_max_min_luma_coding_block_size;

  1305.     ctb_size_y = 1 << ctb_log2_size_y;

  1306.     pic_width_in_ctbs_y =

  1307.         (sps->pic_width_in_luma_samples + ctb_size_y - 1) / ctb_size_y;

  1308.     pic_height_in_ctbs_y =

  1309.         (sps->pic_height_in_luma_samples + ctb_size_y - 1) / ctb_size_y;

  1310.     pic_size_in_ctbs_y = pic_width_in_ctbs_y * pic_height_in_ctbs_y;

  1311. 

  1312.     if (!current->first_slice_segment_in_pic_flag) {

  1313.         unsigned int address_size = av_log2(pic_size_in_ctbs_y - 1) + 1;

  1314.         if (pps->dependent_slice_segments_enabled_flag)

  1315.             flag(dependent_slice_segment_flag);

  1316.         else

  1317.             infer(dependent_slice_segment_flag, 0);

  1318.         u(address_size, slice_segment_address, 0, pic_size_in_ctbs_y - 1);

  1319.     } else {

  1320.         infer(dependent_slice_segment_flag, 0);

  1321.     }

  1322. 

  1323.     if (!current->dependent_slice_segment_flag) {

  1324.         for (i = 0; i < pps->num_extra_slice_header_bits; i++)

  1325.             flags(slice_reserved_flag[i], 1, i);

  1326. 

  1327.         ue(slice_type, 0, 2);

  1328. 

  1329.         if (pps->output_flag_present_flag)

  1330.             flag(pic_output_flag);

  1331. 

  1332.         if (sps->separate_colour_plane_flag)

  1333.             u(2, colour_plane_id, 0, 2);

  1334. 

  1335.         if (current->nal_unit_header.nal_unit_type != HEVC_NAL_IDR_W_RADL &&

  1336.             current->nal_unit_header.nal_unit_type != HEVC_NAL_IDR_N_LP) {

  1337.             const H265RawSTRefPicSet *rps;

  1338. 

  1339.             ub(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, slice_pic_order_cnt_lsb);

  1340. 

  1341.             flag(short_term_ref_pic_set_sps_flag);

  1342.             if (!current->short_term_ref_pic_set_sps_flag) {

  1343.                 CHECK(FUNC(st_ref_pic_set)(ctx, rw, &current->short_term_ref_pic_set,

  1344.                                            sps->num_short_term_ref_pic_sets, sps));

  1345.                 rps = &current->short_term_ref_pic_set;

  1346.             } else if (sps->num_short_term_ref_pic_sets > 1) {

  1347.                 unsigned int idx_size = av_log2(sps->num_short_term_ref_pic_sets - 1) + 1;

  1348.                 u(idx_size, short_term_ref_pic_set_idx,

  1349.                   0, sps->num_short_term_ref_pic_sets - 1);

  1350.                 rps = &sps->st_ref_pic_set[current->short_term_ref_pic_set_idx];

  1351.             } else {

  1352.                 infer(short_term_ref_pic_set_idx, 0);

  1353.                 rps = &sps->st_ref_pic_set[0];

  1354.             }

  1355. 

  1356.             num_pic_total_curr = 0;

  1357.             for (i = 0; i < rps->num_negative_pics; i++)

  1358.                 if (rps->used_by_curr_pic_s0_flag[i])

  1359.                     ++num_pic_total_curr;

  1360.             for (i = 0; i < rps->num_positive_pics; i++)

  1361.                 if (rps->used_by_curr_pic_s1_flag[i])

  1362.                     ++num_pic_total_curr;

  1363. 

  1364.             if (sps->long_term_ref_pics_present_flag) {

  1365.                 unsigned int idx_size;

  1366. 

  1367.                 if (sps->num_long_term_ref_pics_sps > 0) {

  1368.                     ue(num_long_term_sps, 0, sps->num_long_term_ref_pics_sps);

  1369.                     idx_size = av_log2(sps->num_long_term_ref_pics_sps - 1) + 1;

  1370.                 } else {

  1371.                     infer(num_long_term_sps, 0);

  1372.                     idx_size = 0;

  1373.                 }

  1374.                 ue(num_long_term_pics, 0, HEVC_MAX_LONG_TERM_REF_PICS);

  1375. 

  1376.                 for (i = 0; i < current->num_long_term_sps +

  1377.                                 current->num_long_term_pics; i++) {

  1378.                     if (i < current->num_long_term_sps) {

  1379.                         if (sps->num_long_term_ref_pics_sps > 1)

  1380.                             us(idx_size, lt_idx_sps[i],

  1381.                                0, sps->num_long_term_ref_pics_sps - 1, 1, i);

  1382.                         if (sps->used_by_curr_pic_lt_sps_flag[current->lt_idx_sps[i]])

  1383.                             ++num_pic_total_curr;

  1384.                     } else {

  1385.                         ubs(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, poc_lsb_lt[i], 1, i);

  1386.                         flags(used_by_curr_pic_lt_flag[i], 1, i);

  1387.                         if (current->used_by_curr_pic_lt_flag[i])

  1388.                             ++num_pic_total_curr;

  1389.                     }

  1390.                     flags(delta_poc_msb_present_flag[i], 1, i);

  1391.                     if (current->delta_poc_msb_present_flag[i])

  1392.                         ues(delta_poc_msb_cycle_lt[i], 0, UINT32_MAX - 1, 1, i);

  1393.                     else

  1394.                         infer(delta_poc_msb_cycle_lt[i], 0);

  1395.                 }

  1396.             }

  1397. 

  1398.             if (sps->sps_temporal_mvp_enabled_flag)

  1399.                 flag(slice_temporal_mvp_enabled_flag);

  1400.             else

  1401.                 infer(slice_temporal_mvp_enabled_flag, 0);

  1402. 

  1403.             if (pps->pps_curr_pic_ref_enabled_flag)

  1404.                 ++num_pic_total_curr;

  1405.         }

  1406. 

  1407.         if (sps->sample_adaptive_offset_enabled_flag) {

  1408.             flag(slice_sao_luma_flag);

  1409.             if (!sps->separate_colour_plane_flag && sps->chroma_format_idc != 0)

  1410.                 flag(slice_sao_chroma_flag);

  1411.             else

  1412.                 infer(slice_sao_chroma_flag, 0);

  1413.         } else {

  1414.             infer(slice_sao_luma_flag,   0);

  1415.             infer(slice_sao_chroma_flag, 0);

  1416.         }

  1417. 

  1418.         if (current->slice_type == HEVC_SLICE_P ||

  1419.             current->slice_type == HEVC_SLICE_B) {

  1420.             flag(num_ref_idx_active_override_flag);

  1421.             if (current->num_ref_idx_active_override_flag) {

  1422.                 ue(num_ref_idx_l0_active_minus1, 0, 14);

  1423.                 if (current->slice_type == HEVC_SLICE_B)

  1424.                     ue(num_ref_idx_l1_active_minus1, 0, 14);

  1425.                 else

  1426.                     infer(num_ref_idx_l1_active_minus1, pps->num_ref_idx_l1_default_active_minus1);

  1427.             } else {

  1428.                 infer(num_ref_idx_l0_active_minus1, pps->num_ref_idx_l0_default_active_minus1);

  1429.                 infer(num_ref_idx_l1_active_minus1, pps->num_ref_idx_l1_default_active_minus1);

  1430.             }

  1431. 

  1432.             if (pps->lists_modification_present_flag && num_pic_total_curr > 1)

  1433.                 CHECK(FUNC(ref_pic_lists_modification)(ctx, rw, current,

  1434.                                                        num_pic_total_curr));

  1435. 

  1436.             if (current->slice_type == HEVC_SLICE_B)

  1437.                 flag(mvd_l1_zero_flag);

  1438.             if (pps->cabac_init_present_flag)

  1439.                 flag(cabac_init_flag);

  1440.             else

  1441.                 infer(cabac_init_flag, 0);

  1442.             if (current->slice_temporal_mvp_enabled_flag) {

  1443.                 if (current->slice_type == HEVC_SLICE_B)

  1444.                     flag(collocated_from_l0_flag);

  1445.                 else

  1446.                     infer(collocated_from_l0_flag, 1);

  1447.                 if (current->collocated_from_l0_flag) {

  1448.                     if (current->num_ref_idx_l0_active_minus1 > 0)

  1449.                         ue(collocated_ref_idx, 0, current->num_ref_idx_l0_active_minus1);

  1450.                     else

  1451.                         infer(collocated_ref_idx, 0);

  1452.                 } else {

  1453.                     if (current->num_ref_idx_l1_active_minus1 > 0)

  1454.                         ue(collocated_ref_idx, 0, current->num_ref_idx_l1_active_minus1);

  1455.                     else

  1456.                         infer(collocated_ref_idx, 0);

  1457.                 }

  1458.             }

  1459. 

  1460.             if ((pps->weighted_pred_flag   && current->slice_type == HEVC_SLICE_P) ||

  1461.                 (pps->weighted_bipred_flag && current->slice_type == HEVC_SLICE_B))

  1462.                 CHECK(FUNC(pred_weight_table)(ctx, rw, current));

  1463. 

  1464.             ue(five_minus_max_num_merge_cand, 0, 4);

  1465.             if (sps->motion_vector_resolution_control_idc == 2)

  1466.                 flag(use_integer_mv_flag);

  1467.             else

  1468.                 infer(use_integer_mv_flag, sps->motion_vector_resolution_control_idc);

  1469.         }

  1470. 

  1471.         se(slice_qp_delta,

  1472.            - 6 * sps->bit_depth_luma_minus8 - (pps->init_qp_minus26 + 26),

  1473.            + 51 - (pps->init_qp_minus26 + 26));

  1474.         if (pps->pps_slice_chroma_qp_offsets_present_flag) {

  1475.             se(slice_cb_qp_offset, -12, +12);

  1476.             se(slice_cr_qp_offset, -12, +12);

  1477.         } else {

  1478.             infer(slice_cb_qp_offset, 0);

  1479.             infer(slice_cr_qp_offset, 0);

  1480.         }

  1481.         if (pps->pps_slice_act_qp_offsets_present_flag) {

  1482.             se(slice_act_y_qp_offset,

  1483.                -12 - (pps->pps_act_y_qp_offset_plus5 - 5),

  1484.                +12 - (pps->pps_act_y_qp_offset_plus5 - 5));

  1485.             se(slice_act_cb_qp_offset,

  1486.                -12 - (pps->pps_act_cb_qp_offset_plus5 - 5),

  1487.                +12 - (pps->pps_act_cb_qp_offset_plus5 - 5));

  1488.             se(slice_act_cr_qp_offset,

  1489.                -12 - (pps->pps_act_cr_qp_offset_plus3 - 3),

  1490.                +12 - (pps->pps_act_cr_qp_offset_plus3 - 3));

  1491.         } else {

  1492.             infer(slice_act_y_qp_offset,  0);

  1493.             infer(slice_act_cb_qp_offset, 0);

  1494.             infer(slice_act_cr_qp_offset, 0);

  1495.         }

  1496.         if (pps->chroma_qp_offset_list_enabled_flag)

  1497.             flag(cu_chroma_qp_offset_enabled_flag);

  1498.         else

  1499.             infer(cu_chroma_qp_offset_enabled_flag, 0);

  1500. 

  1501.         if (pps->deblocking_filter_override_enabled_flag)

  1502.             flag(deblocking_filter_override_flag);

  1503.         else

  1504.             infer(deblocking_filter_override_flag, 0);

  1505.         if (current->deblocking_filter_override_flag) {

  1506.             flag(slice_deblocking_filter_disabled_flag);

  1507.             if (!current->slice_deblocking_filter_disabled_flag) {

  1508.                 se(slice_beta_offset_div2, -6, +6);

  1509.                 se(slice_tc_offset_div2,   -6, +6);

  1510.             } else {

  1511.                 infer(slice_beta_offset_div2, pps->pps_beta_offset_div2);

  1512.                 infer(slice_tc_offset_div2,   pps->pps_tc_offset_div2);

  1513.             }

  1514.         } else {

  1515.             infer(slice_deblocking_filter_disabled_flag,

  1516.                   pps->pps_deblocking_filter_disabled_flag);

  1517.             infer(slice_beta_offset_div2, pps->pps_beta_offset_div2);

  1518.             infer(slice_tc_offset_div2,   pps->pps_tc_offset_div2);

  1519.         }

  1520.         if (pps->pps_loop_filter_across_slices_enabled_flag &&

  1521.             (current->slice_sao_luma_flag || current->slice_sao_chroma_flag ||

  1522.              !current->slice_deblocking_filter_disabled_flag))

  1523.             flag(slice_loop_filter_across_slices_enabled_flag);

  1524.         else

  1525.             infer(slice_loop_filter_across_slices_enabled_flag,

  1526.                   pps->pps_loop_filter_across_slices_enabled_flag);

  1527.     }

  1528. 

  1529.     if (pps->tiles_enabled_flag || pps->entropy_coding_sync_enabled_flag) {

  1530.         unsigned int num_entry_point_offsets_limit;

  1531.         if (!pps->tiles_enabled_flag && pps->entropy_coding_sync_enabled_flag)

  1532.             num_entry_point_offsets_limit = pic_height_in_ctbs_y - 1;

  1533.         else if (pps->tiles_enabled_flag && !pps->entropy_coding_sync_enabled_flag)

  1534.             num_entry_point_offsets_limit =

  1535.                 (pps->num_tile_columns_minus1 + 1) * (pps->num_tile_rows_minus1 + 1);

  1536.         else

  1537.             num_entry_point_offsets_limit =

  1538.                 (pps->num_tile_columns_minus1 + 1) * pic_height_in_ctbs_y - 1;

  1539.         ue(num_entry_point_offsets, 0, num_entry_point_offsets_limit);

  1540. 

  1541.         if (current->num_entry_point_offsets > HEVC_MAX_ENTRY_POINT_OFFSETS) {

  1542.             av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many entry points: "

  1543.                    "%"PRIu16".\n", current->num_entry_point_offsets);

  1544.             return AVERROR_PATCHWELCOME;

  1545.         }

  1546. 

  1547.         if (current->num_entry_point_offsets > 0) {

  1548.             ue(offset_len_minus1, 0, 31);

  1549.             for (i = 0; i < current->num_entry_point_offsets; i++)

  1550.                 ubs(current->offset_len_minus1 + 1, entry_point_offset_minus1[i], 1, i);

  1551.         }

  1552.     }

  1553. 

  1554.     if (pps->slice_segment_header_extension_present_flag) {

  1555.         ue(slice_segment_header_extension_length, 0, 256);

  1556.         for (i = 0; i < current->slice_segment_header_extension_length; i++)

  1557.             us(8, slice_segment_header_extension_data_byte[i], 0x00, 0xff, 1, i);

  1558.     }

  1559. 

  1560.     CHECK(FUNC(byte_alignment)(ctx, rw));

  1561. 

  1562.     return 0;

  1563. }

  1564. 

  1565. static int FUNC(sei_buffering_period)(CodedBitstreamContext *ctx, RWContext *rw,

  1566.                                       H265RawSEIBufferingPeriod *current,

  1567.                                       uint32_t *payload_size)

  1568. {

  1569.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  1570.     const H265RawSPS *sps;

  1571.     const H265RawHRDParameters *hrd;

  1572.     int err, i, length;

  1573. 

  1574. #ifdef READ

  1575.     int start_pos, end_pos, bits_left;

  1576.     start_pos = get_bits_count(rw);

  1577. #endif

  1578. 

  1579.     HEADER("Buffering Period");

  1580. 

  1581.     ue(bp_seq_parameter_set_id, 0, HEVC_MAX_SPS_COUNT - 1);

  1582. 

  1583.     sps = h265->sps[current->bp_seq_parameter_set_id];

  1584.     if (!sps) {

  1585.         av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",

  1586.                current->bp_seq_parameter_set_id);

  1587.         return AVERROR_INVALIDDATA;

  1588.     }

  1589.     h265->active_sps = sps;

  1590. 

  1591.     if (!sps->vui_parameters_present_flag ||

  1592.         !sps->vui.vui_hrd_parameters_present_flag) {

  1593.         av_log(ctx->log_ctx, AV_LOG_ERROR, "Buffering period SEI requires "

  1594.                "HRD parameters to be present in SPS.\n");

  1595.         return AVERROR_INVALIDDATA;

  1596.     }

  1597.     hrd = &sps->vui.hrd_parameters;

  1598.     if (!hrd->nal_hrd_parameters_present_flag &&

  1599.         !hrd->vcl_hrd_parameters_present_flag) {

  1600.         av_log(ctx->log_ctx, AV_LOG_ERROR, "Buffering period SEI requires "

  1601.                "NAL or VCL HRD parameters to be present.\n");

  1602.         return AVERROR_INVALIDDATA;

  1603.     }

  1604. 

  1605.     if (!hrd->sub_pic_hrd_params_present_flag)

  1606.         flag(irap_cpb_params_present_flag);

  1607.     else

  1608.         infer(irap_cpb_params_present_flag, 0);

  1609.     if (current->irap_cpb_params_present_flag) {

  1610.         length = hrd->au_cpb_removal_delay_length_minus1 + 1;

  1611.         ub(length, cpb_delay_offset);

  1612.         length = hrd->dpb_output_delay_length_minus1 + 1;

  1613.         ub(length, dpb_delay_offset);

  1614.     } else {

  1615.         infer(cpb_delay_offset, 0);

  1616.         infer(dpb_delay_offset, 0);

  1617.     }

  1618. 

  1619.     flag(concatenation_flag);

  1620. 

  1621.     length = hrd->au_cpb_removal_delay_length_minus1 + 1;

  1622.     ub(length, au_cpb_removal_delay_delta_minus1);

  1623. 

  1624.     if (hrd->nal_hrd_parameters_present_flag) {

  1625.         for (i = 0; i <= hrd->cpb_cnt_minus1[0]; i++) {

  1626.             length = hrd->initial_cpb_removal_delay_length_minus1 + 1;

  1627. 

  1628.             ubs(length, nal_initial_cpb_removal_delay[i], 1, i);

  1629.             ubs(length, nal_initial_cpb_removal_offset[i], 1, i);

  1630. 

  1631.             if (hrd->sub_pic_hrd_params_present_flag ||

  1632.                 current->irap_cpb_params_present_flag) {

  1633.                 ubs(length, nal_initial_alt_cpb_removal_delay[i], 1, i);

  1634.                 ubs(length, nal_initial_alt_cpb_removal_offset[i], 1, i);

  1635.             }

  1636.         }

  1637.     }

  1638.     if (hrd->vcl_hrd_parameters_present_flag) {

  1639.         for (i = 0; i <= hrd->cpb_cnt_minus1[0]; i++) {

  1640.             length = hrd->initial_cpb_removal_delay_length_minus1 + 1;

  1641. 

  1642.             ubs(length, vcl_initial_cpb_removal_delay[i], 1, i);

  1643.             ubs(length, vcl_initial_cpb_removal_offset[i], 1, i);

  1644. 

  1645.             if (hrd->sub_pic_hrd_params_present_flag ||

  1646.                 current->irap_cpb_params_present_flag) {

  1647.                 ubs(length, vcl_initial_alt_cpb_removal_delay[i], 1, i);

  1648.                 ubs(length, vcl_initial_alt_cpb_removal_offset[i], 1, i);

  1649.             }

  1650.         }

  1651.     }

  1652. 

  1653. #ifdef READ

  1654.     // payload_extension_present() - true if we are before the last 1-bit

  1655.     // in the payload structure, which must be in the last byte.

  1656.     end_pos = get_bits_count(rw);

  1657.     bits_left = *payload_size * 8 - (end_pos - start_pos);

  1658.     if (bits_left > 0 &&

  1659.         (bits_left > 7 || ff_ctz(show_bits(rw, bits_left)) < bits_left - 1))

  1660.         flag(use_alt_cpb_params_flag);

  1661.     else

  1662.         infer(use_alt_cpb_params_flag, 0);

  1663. #else

  1664.     if (current->use_alt_cpb_params_flag)

  1665.         flag(use_alt_cpb_params_flag);

  1666. #endif

  1667. 

  1668.     return 0;

  1669. }

  1670. 

  1671. static int FUNC(sei_pic_timing)(CodedBitstreamContext *ctx, RWContext *rw,

  1672.                                 H265RawSEIPicTiming *current)

  1673. {

  1674.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  1675.     const H265RawSPS *sps;

  1676.     const H265RawHRDParameters *hrd;

  1677.     int err, expected_source_scan_type, i, length;

  1678. 

  1679.     HEADER("Picture Timing");

  1680. 

  1681.     sps = h265->active_sps;

  1682.     if (!sps) {

  1683.         av_log(ctx->log_ctx, AV_LOG_ERROR,

  1684.                "No active SPS for pic_timing.\n");

  1685.         return AVERROR_INVALIDDATA;

  1686.     }

  1687. 

  1688.     expected_source_scan_type = 2 -

  1689.         2 * sps->profile_tier_level.general_interlaced_source_flag -

  1690.         sps->profile_tier_level.general_progressive_source_flag;

  1691. 

  1692.     if (sps->vui.frame_field_info_present_flag) {

  1693.         u(4, pic_struct, 0, 12);

  1694.         u(2, source_scan_type,

  1695.           expected_source_scan_type >= 0 ? expected_source_scan_type : 0,

  1696.           expected_source_scan_type >= 0 ? expected_source_scan_type : 2);

  1697.         flag(duplicate_flag);

  1698.     } else {

  1699.         infer(pic_struct, 0);

  1700.         infer(source_scan_type,

  1701.               expected_source_scan_type >= 0 ? expected_source_scan_type : 2);

  1702.         infer(duplicate_flag, 0);

  1703.     }

  1704. 

  1705.     if (sps->vui_parameters_present_flag &&

  1706.         sps->vui.vui_hrd_parameters_present_flag)

  1707.         hrd = &sps->vui.hrd_parameters;

  1708.     else

  1709.         hrd = NULL;

  1710.     if (hrd && (hrd->nal_hrd_parameters_present_flag ||

  1711.                 hrd->vcl_hrd_parameters_present_flag)) {

  1712.         length = hrd->au_cpb_removal_delay_length_minus1 + 1;

  1713.         ub(length, au_cpb_removal_delay_minus1);

  1714. 

  1715.         length = hrd->dpb_output_delay_length_minus1 + 1;

  1716.         ub(length, pic_dpb_output_delay);

  1717. 

  1718.         if (hrd->sub_pic_hrd_params_present_flag) {

  1719.             length = hrd->dpb_output_delay_du_length_minus1 + 1;

  1720.             ub(length, pic_dpb_output_du_delay);

  1721.         }

  1722. 

  1723.         if (hrd->sub_pic_hrd_params_present_flag &&

  1724.             hrd->sub_pic_cpb_params_in_pic_timing_sei_flag) {

  1725.             // Each decoding unit must contain at least one slice segment.

  1726.             ue(num_decoding_units_minus1, 0, HEVC_MAX_SLICE_SEGMENTS);

  1727.             flag(du_common_cpb_removal_delay_flag);

  1728. 

  1729.             length = hrd->du_cpb_removal_delay_increment_length_minus1 + 1;

  1730.             if (current->du_common_cpb_removal_delay_flag)

  1731.                 ub(length, du_common_cpb_removal_delay_increment_minus1);

  1732. 

  1733.             for (i = 0; i <= current->num_decoding_units_minus1; i++) {

  1734.                 ues(num_nalus_in_du_minus1[i],

  1735.                     0, HEVC_MAX_SLICE_SEGMENTS, 1, i);

  1736.                 if (!current->du_common_cpb_removal_delay_flag &&

  1737.                     i < current->num_decoding_units_minus1)

  1738.                     ubs(length, du_cpb_removal_delay_increment_minus1[i], 1, i);

  1739.             }

  1740.         }

  1741.     }

  1742. 

  1743.     return 0;

  1744. }

  1745. 

  1746. static int FUNC(sei_pan_scan_rect)(CodedBitstreamContext *ctx, RWContext *rw,

  1747.                                    H265RawSEIPanScanRect *current)

  1748. {

  1749.     int err, i;

  1750. 

  1751.     HEADER("Pan-Scan Rectangle");

  1752. 

  1753.     ue(pan_scan_rect_id, 0, UINT32_MAX - 1);

  1754.     flag(pan_scan_rect_cancel_flag);

  1755. 

  1756.     if (!current->pan_scan_rect_cancel_flag) {

  1757.         ue(pan_scan_cnt_minus1, 0, 2);

  1758. 

  1759.         for (i = 0; i <= current->pan_scan_cnt_minus1; i++) {

  1760.             ses(pan_scan_rect_left_offset[i],   INT32_MIN + 1, INT32_MAX, 1, i);

  1761.             ses(pan_scan_rect_right_offset[i],  INT32_MIN + 1, INT32_MAX, 1, i);

  1762.             ses(pan_scan_rect_top_offset[i],    INT32_MIN + 1, INT32_MAX, 1, i);

  1763.             ses(pan_scan_rect_bottom_offset[i], INT32_MIN + 1, INT32_MAX, 1, i);

  1764.         }

  1765. 

  1766.         flag(pan_scan_rect_persistence_flag);

  1767.     }

  1768. 

  1769.     return 0;

  1770. }

  1771. 

  1772. static int FUNC(sei_user_data_registered)(CodedBitstreamContext *ctx, RWContext *rw,

  1773.                                           H265RawSEIUserDataRegistered *current,

  1774.                                           uint32_t *payload_size)

  1775. {

  1776.     int err, i, j;

  1777. 

  1778.     HEADER("User Data Registered ITU-T T.35");

  1779. 

  1780.     u(8, itu_t_t35_country_code, 0x00, 0xff);

  1781.     if (current->itu_t_t35_country_code != 0xff)

  1782.         i = 1;

  1783.     else {

  1784.         u(8, itu_t_t35_country_code_extension_byte, 0x00, 0xff);

  1785.         i = 2;

  1786.     }

  1787. 

  1788. #ifdef READ

  1789.     if (*payload_size < i) {

  1790.         av_log(ctx->log_ctx, AV_LOG_ERROR,

  1791.                "Invalid SEI user data registered payload.\n");

  1792.         return AVERROR_INVALIDDATA;

  1793.     }

  1794.     current->data_length = *payload_size - i;

  1795. #else

  1796.     *payload_size = i + current->data_length;

  1797. #endif

  1798. 

  1799.     allocate(current->data, current->data_length);

  1800.     for (j = 0; j < current->data_length; j++)

  1801.         xu(8, itu_t_t35_payload_byte[i], current->data[j], 0x00, 0xff, 1, i + j);

  1802. 

  1803.     return 0;

  1804. }

  1805. 

  1806. static int FUNC(sei_user_data_unregistered)(CodedBitstreamContext *ctx, RWContext *rw,

  1807.                                             H265RawSEIUserDataUnregistered *current,

  1808.                                             uint32_t *payload_size)

  1809. {

  1810.     int err, i;

  1811. 

  1812.     HEADER("User Data Unregistered");

  1813. 

  1814. #ifdef READ

  1815.     if (*payload_size < 16) {

  1816.         av_log(ctx->log_ctx, AV_LOG_ERROR,

  1817.                "Invalid SEI user data unregistered payload.\n");

  1818.         return AVERROR_INVALIDDATA;

  1819.     }

  1820.     current->data_length = *payload_size - 16;

  1821. #else

  1822.     *payload_size = 16 + current->data_length;

  1823. #endif

  1824. 

  1825.     for (i = 0; i < 16; i++)

  1826.         us(8, uuid_iso_iec_11578[i], 0x00, 0xff, 1, i);

  1827. 

  1828.     allocate(current->data, current->data_length);

  1829. 

  1830.     for (i = 0; i < current->data_length; i++)

  1831.         xu(8, user_data_payload_byte[i], current->data[i], 0x00, 0xff, 1, i);

  1832. 

  1833.     return 0;

  1834. }

  1835. 

  1836. static int FUNC(sei_recovery_point)(CodedBitstreamContext *ctx, RWContext *rw,

  1837.                                     H265RawSEIRecoveryPoint *current)

  1838. {

  1839.     int err;

  1840. 

  1841.     HEADER("Recovery Point");

  1842. 

  1843.     se(recovery_poc_cnt, -32768, 32767);

  1844. 

  1845.     flag(exact_match_flag);

  1846.     flag(broken_link_flag);

  1847. 

  1848.     return 0;

  1849. }

  1850. 

  1851. static int FUNC(sei_display_orientation)(CodedBitstreamContext *ctx, RWContext *rw,

  1852.                                          H265RawSEIDisplayOrientation *current)

  1853. {

  1854.     int err;

  1855. 

  1856.     HEADER("Display Orientation");

  1857. 

  1858.     flag(display_orientation_cancel_flag);

  1859.     if (!current->display_orientation_cancel_flag) {

  1860.         flag(hor_flip);

  1861.         flag(ver_flip);

  1862.         ub(16, anticlockwise_rotation);

  1863.         flag(display_orientation_persistence_flag);

  1864.     }

  1865. 

  1866.     return 0;

  1867. }

  1868. 

  1869. static int FUNC(sei_active_parameter_sets)(CodedBitstreamContext *ctx, RWContext *rw,

  1870.                                            H265RawSEIActiveParameterSets *current)

  1871. {

  1872.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  1873.     const H265RawVPS *vps;

  1874.     int err, i;

  1875. 

  1876.     HEADER("Active Parameter Sets");

  1877. 

  1878.     u(4, active_video_parameter_set_id, 0, HEVC_MAX_VPS_COUNT);

  1879.     vps = h265->vps[current->active_video_parameter_set_id];

  1880.     if (!vps) {

  1881.         av_log(ctx->log_ctx, AV_LOG_ERROR, "VPS id %d not available for active "

  1882.                "parameter sets.\n", current->active_video_parameter_set_id);

  1883.         return AVERROR_INVALIDDATA;

  1884.     }

  1885.     h265->active_vps = vps;

  1886. 

  1887.     flag(self_contained_cvs_flag);

  1888.     flag(no_parameter_set_update_flag);

  1889. 

  1890.     ue(num_sps_ids_minus1, 0, HEVC_MAX_SPS_COUNT - 1);

  1891.     for (i = 0; i <= current->num_sps_ids_minus1; i++)

  1892.         ues(active_seq_parameter_set_id[i], 0, HEVC_MAX_SPS_COUNT - 1, 1, i);

  1893. 

  1894.     for (i = vps->vps_base_layer_internal_flag;

  1895.          i <= FFMIN(62, vps->vps_max_layers_minus1); i++) {

  1896.         ues(layer_sps_idx[i], 0, current->num_sps_ids_minus1, 1, i);

  1897. 

  1898.         if (i == 0)

  1899.             h265->active_sps = h265->sps[current->active_seq_parameter_set_id[current->layer_sps_idx[0]]];

  1900.     }

  1901. 

  1902.     return 0;

  1903. }

  1904. 

  1905. static int FUNC(sei_decoded_picture_hash)(CodedBitstreamContext *ctx, RWContext *rw,

  1906.                                           H265RawSEIDecodedPictureHash *current)

  1907. {

  1908.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  1909.     const H265RawSPS *sps = h265->active_sps;

  1910.     int err, c, i;

  1911. 

  1912.     HEADER("Decoded Picture Hash");

  1913. 

  1914.     if (!sps) {

  1915.         av_log(ctx->log_ctx, AV_LOG_ERROR,

  1916.                "No active SPS for decoded picture hash.\n");

  1917.         return AVERROR_INVALIDDATA;

  1918.     }

  1919. 

  1920.     u(8, hash_type, 0, 2);

  1921. 

  1922.     for (c = 0; c < (sps->chroma_format_idc == 0 ? 1 : 3); c++) {

  1923.         if (current->hash_type == 0) {

  1924.             for (i = 0; i < 16; i++)

  1925.                 us(8, picture_md5[c][i], 0x00, 0xff, 2, c, i);

  1926.         } else if (current->hash_type == 1) {

  1927.             us(16, picture_crc[c], 0x0000, 0xffff, 1, c);

  1928.         } else if (current->hash_type == 2) {

  1929.             us(32, picture_checksum[c], 0x00000000, 0xffffffff, 1, c);

  1930.         }

  1931.     }

  1932. 

  1933.     return 0;

  1934. }

  1935. 

  1936. static int FUNC(sei_time_code)(CodedBitstreamContext *ctx, RWContext *rw,

  1937.                                H265RawSEITimeCode *current)

  1938. {

  1939.     int err, i;

  1940. 

  1941.     HEADER("Time Code");

  1942. 

  1943.     u(2, num_clock_ts, 1, 3);

  1944. 

  1945.     for (i = 0; i < current->num_clock_ts; i++) {

  1946.         flags(clock_timestamp_flag[i],   1, i);

  1947. 

  1948.         if (current->clock_timestamp_flag[i]) {

  1949.             flags(units_field_based_flag[i], 1, i);

  1950.             us(5, counting_type[i], 0, 6,    1, i);

  1951.             flags(full_timestamp_flag[i],    1, i);

  1952.             flags(discontinuity_flag[i],     1, i);

  1953.             flags(cnt_dropped_flag[i],       1, i);

  1954. 

  1955.             ubs(9, n_frames[i], 1, i);

  1956. 

  1957.             if (current->full_timestamp_flag[i]) {

  1958.                 us(6, seconds_value[i], 0, 59, 1, i);

  1959.                 us(6, minutes_value[i], 0, 59, 1, i);

  1960.                 us(5, hours_value[i],   0, 23, 1, i);

  1961.             } else {

  1962.                 flags(seconds_flag[i], 1, i);

  1963.                 if (current->seconds_flag[i]) {

  1964.                     us(6, seconds_value[i], 0, 59, 1, i);

  1965.                     flags(minutes_flag[i], 1, i);

  1966.                     if (current->minutes_flag[i]) {

  1967.                         us(6, minutes_value[i], 0, 59, 1, i);

  1968.                         flags(hours_flag[i], 1, i);

  1969.                         if (current->hours_flag[i])

  1970.                             us(5, hours_value[i], 0, 23, 1, i);

  1971.                     }

  1972.                 }

  1973.             }

  1974. 

  1975.             ubs(5, time_offset_length[i], 1, i);

  1976.             if (current->time_offset_length[i] > 0)

  1977.                 ibs(current->time_offset_length[i], time_offset_value[i], 1, i);

  1978.             else

  1979.                 infer(time_offset_value[i], 0);

  1980.         }

  1981.     }

  1982. 

  1983.     return 0;

  1984. }

  1985. 

  1986. static int FUNC(sei_mastering_display)(CodedBitstreamContext *ctx, RWContext *rw,

  1987.                                        H265RawSEIMasteringDisplayColourVolume *current)

  1988. {

  1989.     int err, c;

  1990. 

  1991.     HEADER("Mastering Display Colour Volume");

  1992. 

  1993.     for (c = 0; c < 3; c++) {

  1994.         us(16, display_primaries_x[c], 0, 50000, 1, c);

  1995.         us(16, display_primaries_y[c], 0, 50000, 1, c);

  1996.     }

  1997. 

  1998.     u(16, white_point_x, 0, 50000);

  1999.     u(16, white_point_y, 0, 50000);

  2000. 

  2001.     u(32, max_display_mastering_luminance,

  2002.       1, MAX_UINT_BITS(32));

  2003.     u(32, min_display_mastering_luminance,

  2004.       0, current->max_display_mastering_luminance - 1);

  2005. 

  2006.     return 0;

  2007. }

  2008. 

  2009. static int FUNC(sei_content_light_level)(CodedBitstreamContext *ctx, RWContext *rw,

  2010.                                          H265RawSEIContentLightLevelInfo *current)

  2011. {

  2012.     int err;

  2013. 

  2014.     HEADER("Content Light Level");

  2015. 

  2016.     ub(16, max_content_light_level);

  2017.     ub(16, max_pic_average_light_level);

  2018. 

  2019.     return 0;

  2020. }

  2021. 

  2022. static int FUNC(sei_alternative_transfer_characteristics)(CodedBitstreamContext *ctx,

  2023.                                                           RWContext *rw,

  2024.                                                           H265RawSEIAlternativeTransferCharacteristics *current)

  2025. {

  2026.     int err;

  2027. 

  2028.     HEADER("Alternative Transfer Characteristics");

  2029. 

  2030.     ub(8, preferred_transfer_characteristics);

  2031. 

  2032.     return 0;

  2033. }

  2034. 

  2035. static int FUNC(sei_alpha_channel_info)(CodedBitstreamContext *ctx,

  2036.                                         RWContext *rw,

  2037.                                         H265RawSEIAlphaChannelInfo *current)

  2038. {

  2039.     int err, length;

  2040. 

  2041.     HEADER("Alpha Channel Information");

  2042. 

  2043.     flag(alpha_channel_cancel_flag);

  2044.     if (!current->alpha_channel_cancel_flag) {

  2045.         ub(3, alpha_channel_use_idc);

  2046.         ub(3, alpha_channel_bit_depth_minus8);

  2047.         length = current->alpha_channel_bit_depth_minus8 + 9;

  2048.         ub(length, alpha_transparent_value);

  2049.         ub(length, alpha_opaque_value);

  2050.         flag(alpha_channel_incr_flag);

  2051.         flag(alpha_channel_clip_flag);

  2052.         if (current->alpha_channel_clip_flag)

  2053.             flag(alpha_channel_clip_type_flag);

  2054.     } else {

  2055.        infer(alpha_channel_use_idc,   2);

  2056.        infer(alpha_channel_incr_flag, 0);

  2057.        infer(alpha_channel_clip_flag, 0);

  2058.     }

  2059. 

  2060.     return 0;

  2061. }

  2062. 

  2063. static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,

  2064.                              H265RawSEIPayload *current, int prefix)

  2065. {

  2066.     int err, i;

  2067.     int start_position, end_position;

  2068. 

  2069. #ifdef READ

  2070.     start_position = get_bits_count(rw);

  2071. #else

  2072.     start_position = put_bits_count(rw);

  2073. #endif

  2074. 

  2075.     switch (current->payload_type) {

  2076. #define SEI_TYPE_CHECK_VALID(name, prefix_valid, suffix_valid) do { \

  2077.             if (prefix && !prefix_valid) { \

  2078.                 av_log(ctx->log_ctx, AV_LOG_ERROR, "SEI type %s invalid " \

  2079.                        "as prefix SEI!\n", #name); \

  2080.                 return AVERROR_INVALIDDATA; \

  2081.             } \

  2082.             if (!prefix && !suffix_valid) { \

  2083.                 av_log(ctx->log_ctx, AV_LOG_ERROR, "SEI type %s invalid " \

  2084.                        "as suffix SEI!\n", #name); \

  2085.                 return AVERROR_INVALIDDATA; \

  2086.             } \

  2087.         } while (0)

  2088. #define SEI_TYPE_N(type, prefix_valid, suffix_valid, name) \

  2089.     case HEVC_SEI_TYPE_ ## type: \

  2090.         SEI_TYPE_CHECK_VALID(name, prefix_valid, suffix_valid); \

  2091.         CHECK(FUNC(sei_ ## name)(ctx, rw, &current->payload.name)); \

  2092.         break

  2093. #define SEI_TYPE_S(type, prefix_valid, suffix_valid, name) \

  2094.     case HEVC_SEI_TYPE_ ## type: \

  2095.         SEI_TYPE_CHECK_VALID(name, prefix_valid, suffix_valid); \

  2096.         CHECK(FUNC(sei_ ## name)(ctx, rw, &current->payload.name, \

  2097.                                  &current->payload_size)); \

  2098.         break

  2099. 

  2100.         SEI_TYPE_S(BUFFERING_PERIOD,         1, 0, buffering_period);

  2101.         SEI_TYPE_N(PICTURE_TIMING,           1, 0, pic_timing);

  2102.         SEI_TYPE_N(PAN_SCAN_RECT,            1, 0, pan_scan_rect);

  2103.         SEI_TYPE_S(USER_DATA_REGISTERED_ITU_T_T35,

  2104.                                              1, 1, user_data_registered);

  2105.         SEI_TYPE_S(USER_DATA_UNREGISTERED,   1, 1, user_data_unregistered);

  2106.         SEI_TYPE_N(RECOVERY_POINT,           1, 0, recovery_point);

  2107.         SEI_TYPE_N(DISPLAY_ORIENTATION,      1, 0, display_orientation);

  2108.         SEI_TYPE_N(ACTIVE_PARAMETER_SETS,    1, 0, active_parameter_sets);

  2109.         SEI_TYPE_N(DECODED_PICTURE_HASH,     0, 1, decoded_picture_hash);

  2110.         SEI_TYPE_N(TIME_CODE,                1, 0, time_code);

  2111.         SEI_TYPE_N(MASTERING_DISPLAY_INFO,   1, 0, mastering_display);

  2112.         SEI_TYPE_N(CONTENT_LIGHT_LEVEL_INFO, 1, 0, content_light_level);

  2113.         SEI_TYPE_N(ALTERNATIVE_TRANSFER_CHARACTERISTICS,

  2114.                                              1, 0, alternative_transfer_characteristics);

  2115.         SEI_TYPE_N(ALPHA_CHANNEL_INFO,       1, 0, alpha_channel_info);

  2116. 

  2117. #undef SEI_TYPE

  2118.     default:

  2119.         {

  2120. #ifdef READ

  2121.             current->payload.other.data_length = current->payload_size;

  2122. #endif

  2123.             allocate(current->payload.other.data, current->payload.other.data_length);

  2124. 

  2125.             for (i = 0; i < current->payload_size; i++)

  2126.                 xu(8, payload_byte[i], current->payload.other.data[i], 0, 255,

  2127.                    1, i);

  2128.         }

  2129.     }

  2130. 

  2131.     if (byte_alignment(rw)) {

  2132.         fixed(1, bit_equal_to_one, 1);

  2133.         while (byte_alignment(rw))

  2134.             fixed(1, bit_equal_to_zero, 0);

  2135.     }

  2136. 

  2137. #ifdef READ

  2138.     end_position = get_bits_count(rw);

  2139.     if (end_position < start_position + 8 * current->payload_size) {

  2140.         av_log(ctx->log_ctx, AV_LOG_ERROR, "Incorrect SEI payload length: "

  2141.                "header %"PRIu32" bits, actually %d bits.\n",

  2142.                8 * current->payload_size,

  2143.                end_position - start_position);

  2144.         return AVERROR_INVALIDDATA;

  2145.     }

  2146. #else

  2147.     end_position = put_bits_count(rw);

  2148.     current->payload_size = (end_position - start_position) >> 3;

  2149. #endif

  2150. 

  2151.     return 0;

  2152. }

  2153. 

  2154. static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,

  2155.                      H265RawSEI *current, int prefix)

  2156. {

  2157.     int err, k;

  2158. 

  2159.     if (prefix)

  2160.         HEADER("Prefix Supplemental Enhancement Information");

  2161.     else

  2162.         HEADER("Suffix Supplemental Enhancement Information");

  2163. 

  2164.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,

  2165.                                 prefix ? HEVC_NAL_SEI_PREFIX

  2166.                                        : HEVC_NAL_SEI_SUFFIX));

  2167. 

  2168. #ifdef READ

  2169.     for (k = 0; k < H265_MAX_SEI_PAYLOADS; k++) {

  2170.         uint32_t payload_type = 0;

  2171.         uint32_t payload_size = 0;

  2172.         uint32_t tmp;

  2173. 

  2174.         while (show_bits(rw, 8) == 0xff) {

  2175.             fixed(8, ff_byte, 0xff);

  2176.             payload_type += 255;

  2177.         }

  2178.         xu(8, last_payload_type_byte, tmp, 0, 254, 0);

  2179.         payload_type += tmp;

  2180. 

  2181.         while (show_bits(rw, 8) == 0xff) {

  2182.             fixed(8, ff_byte, 0xff);

  2183.             payload_size += 255;

  2184.         }

  2185.         xu(8, last_payload_size_byte, tmp, 0, 254, 0);

  2186.         payload_size += tmp;

  2187. 

  2188.         current->payload[k].payload_type = payload_type;

  2189.         current->payload[k].payload_size = payload_size;

  2190. 

  2191.         current->payload_count++;

  2192.         CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k], prefix));

  2193. 

  2194.         if (!cbs_h2645_read_more_rbsp_data(rw))

  2195.             break;

  2196.     }

  2197.     if (k >= H265_MAX_SEI_PAYLOADS) {

  2198.         av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many payloads in "

  2199.                "SEI message: found %d.\n", k);

  2200.         return AVERROR_INVALIDDATA;

  2201.     }

  2202. #else

  2203.     for (k = 0; k < current->payload_count; k++) {

  2204.         PutBitContext start_state;

  2205.         uint32_t tmp;

  2206.         int need_size, i;

  2207. 

  2208.         // Somewhat clumsy: we write the payload twice when

  2209.         // we don't know the size in advance.  This will mess

  2210.         // with trace output, but is otherwise harmless.

  2211.         start_state = *rw;

  2212.         need_size = !current->payload[k].payload_size;

  2213.         for (i = 0; i < 1 + need_size; i++) {

  2214.             *rw = start_state;

  2215. 

  2216.             tmp = current->payload[k].payload_type;

  2217.             while (tmp >= 255) {

  2218.                 fixed(8, ff_byte, 0xff);

  2219.                 tmp -= 255;

  2220.             }

  2221.             xu(8, last_payload_type_byte, tmp, 0, 254, 0);

  2222. 

  2223.             tmp = current->payload[k].payload_size;

  2224.             while (tmp >= 255) {

  2225.                 fixed(8, ff_byte, 0xff);

  2226.                 tmp -= 255;

  2227.             }

  2228.             xu(8, last_payload_size_byte, tmp, 0, 254, 0);

  2229. 

  2230.             CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k], prefix));

  2231.         }

  2232.     }

  2233. #endif

  2234. 

  2235.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  2236. 

  2237.     return 0;

  2238. }