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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.     u(1, forbidden_zero_bit, 0, 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.         u(6, nal_unit_type, 0, 63);

  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.                                 H265RawPSExtensionData *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), 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.         u(5, general_profile_idc, 0, 31);

  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.     u(8, general_level_idc, 0, 255);

  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.             us(5, sub_layer_profile_idc[i], 0, 31,  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.             us(8, sub_layer_level_idc[i], 0, 255, 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.                 u(8, tick_divisor_minus2, 0, 255);

  269.                 u(5, du_cpb_removal_delay_increment_length_minus1, 0, 31);

  270.                 flag(sub_pic_cpb_params_in_pic_timing_sei_flag);

  271.                 u(5, dpb_output_delay_du_length_minus1, 0, 31);

  272.             }

  273. 

  274.             u(4, bit_rate_scale, 0, 15);

  275.             u(4, cpb_size_scale, 0, 15);

  276.             if (current->sub_pic_hrd_params_present_flag)

  277.                 u(4, cpb_size_du_scale, 0, 15);

  278. 

  279.             u(5, initial_cpb_removal_delay_length_minus1, 0, 31);

  280.             u(5, au_cpb_removal_delay_length_minus1,      0, 31);

  281.             u(5, dpb_output_delay_length_minus1,          0, 31);

  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.         u(8, aspect_ratio_idc, 0, 255);

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

  328.             u(16, sar_width,  0, 65535);

  329.             u(16, sar_height, 0, 65535);

  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.         u(3, video_format, 0, 7);

  342.         flag(video_full_range_flag);

  343.         flag(colour_description_present_flag);

  344.         if (current->colour_description_present_flag) {

  345.             u(8, colour_primaries,         0, 255);

  346.             u(8, transfer_characteristics, 0, 255);

  347.             u(8, matrix_coefficients,      0, 255);

  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.     u(4, vps_video_parameter_set_id, 0, 15);

  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.         infer(num_negative_pics, i);

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

  606.             infer(delta_poc_s0_minus1[i],

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

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

  609.         }

  610. 

  611.         i = 0;

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

  613.             d_poc = ref_delta_poc_s0[j] + delta_rps;

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

  615.                 delta_poc_s1[i] = d_poc;

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

  617.             }

  618.         }

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

  620.             delta_poc_s1[i] = delta_rps;

  621.             used_by_curr_pic_s1[i++] =

  622.                 current->used_by_curr_pic_flag[num_delta_pocs];

  623.         }

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

  625.             d_poc = ref_delta_poc_s1[j] + delta_rps;

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

  627.                 delta_poc_s1[i] = d_poc;

  628.                 used_by_curr_pic_s1[i++] =

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

  630.             }

  631.         }

  632. 

  633.         infer(num_positive_pics, i);

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

  635.             infer(delta_poc_s1_minus1[i],

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

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

  638.         }

  639. 

  640.     } else {

  641.         ue(num_negative_pics, 0, 15);

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

  643. 

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

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

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

  647.         }

  648. 

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

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

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

  652.         }

  653.     }

  654. 

  655.     return 0;

  656. }

  657. 

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

  659.                                    H265RawScalingList *current)

  660. {

  661.     int sizeId, matrixId;

  662.     int err, n, i;

  663. 

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

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

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

  667.                   2, sizeId, matrixId);

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

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

  670.                     0, sizeId == 3 ? matrixId / 3 : matrixId,

  671.                     2, sizeId, matrixId);

  672.             } else {

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

  674.                 if (sizeId > 1) {

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

  676.                         2, sizeId - 2, matrixId);

  677.                 }

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

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

  680.                         -128, +127, 3, sizeId, matrixId, i);

  681.                 }

  682.             }

  683.         }

  684.     }

  685. 

  686.     return 0;

  687. }

  688. 

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

  690.                                      H265RawSPS *current)

  691. {

  692.     int err;

  693. 

  694.     flag(transform_skip_rotation_enabled_flag);

  695.     flag(transform_skip_context_enabled_flag);

  696.     flag(implicit_rdpcm_enabled_flag);

  697.     flag(explicit_rdpcm_enabled_flag);

  698.     flag(extended_precision_processing_flag);

  699.     flag(intra_smoothing_disabled_flag);

  700.     flag(high_precision_offsets_enabled_flag);

  701.     flag(persistent_rice_adaptation_enabled_flag);

  702.     flag(cabac_bypass_alignment_enabled_flag);

  703. 

  704.     return 0;

  705. }

  706. 

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

  708.                                    H265RawSPS *current)

  709. {

  710.     int err, comp, i;

  711. 

  712.     flag(sps_curr_pic_ref_enabled_flag);

  713. 

  714.     flag(palette_mode_enabled_flag);

  715.     if (current->palette_mode_enabled_flag) {

  716.         ue(palette_max_size, 0, 64);

  717.         ue(delta_palette_max_predictor_size, 0, 128);

  718. 

  719.         flag(sps_palette_predictor_initializer_present_flag);

  720.         if (current->sps_palette_predictor_initializer_present_flag) {

  721.             ue(sps_num_palette_predictor_initializer_minus1, 0, 128);

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

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

  724.                                           : current->bit_depth_chroma_minus8 + 8;

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

  726.                     us(bit_depth, sps_palette_predictor_initializers[comp][i],

  727.                        0, MAX_UINT_BITS(bit_depth), 2, comp, i);

  728.             }

  729.         }

  730.     }

  731. 

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

  733.     flag(intra_boundary_filtering_disable_flag);

  734. 

  735.     return 0;

  736. }

  737. 

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

  739.                      H265RawSPS *current)

  740. {

  741.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  742.     const H265RawVPS *vps;

  743.     int err, i;

  744.     unsigned int min_cb_log2_size_y, ctb_log2_size_y,

  745.                  min_cb_size_y,   min_tb_log2_size_y;

  746. 

  747.     HEADER("Sequence Parameter Set");

  748. 

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

  750. 

  751.     u(4, sps_video_parameter_set_id, 0, 15);

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

  753. 

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

  755.     flag(sps_temporal_id_nesting_flag);

  756.     if (vps) {

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

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

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

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

  761.                    vps->vps_max_sub_layers_minus1,

  762.                    current->sps_max_sub_layers_minus1);

  763.             return AVERROR_INVALIDDATA;

  764.         }

  765.         if (vps->vps_temporal_id_nesting_flag &&

  766.             !current->sps_temporal_id_nesting_flag) {

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

  768.                    "sps_temporal_id_nesting_flag must be 1 if "

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

  770.             return AVERROR_INVALIDDATA;

  771.         }

  772.     }

  773. 

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

  775.                                    1, current->sps_max_sub_layers_minus1));

  776. 

  777.     ue(sps_seq_parameter_set_id, 0, 15);

  778. 

  779.     ue(chroma_format_idc, 0, 3);

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

  781.         flag(separate_colour_plane_flag);

  782.     else

  783.         infer(separate_colour_plane_flag, 0);

  784. 

  785.     ue(pic_width_in_luma_samples,  1, HEVC_MAX_WIDTH);

  786.     ue(pic_height_in_luma_samples, 1, HEVC_MAX_HEIGHT);

  787. 

  788.     flag(conformance_window_flag);

  789.     if (current->conformance_window_flag) {

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

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

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

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

  794.     } else {

  795.         infer(conf_win_left_offset,   0);

  796.         infer(conf_win_right_offset,  0);

  797.         infer(conf_win_top_offset,    0);

  798.         infer(conf_win_bottom_offset, 0);

  799.     }

  800. 

  801.     ue(bit_depth_luma_minus8,   0, 8);

  802.     ue(bit_depth_chroma_minus8, 0, 8);

  803. 

  804.     ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12);

  805. 

  806.     flag(sps_sub_layer_ordering_info_present_flag);

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

  808.               0 : current->sps_max_sub_layers_minus1);

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

  810.         ues(sps_max_dec_pic_buffering_minus1[i],

  811.             0, HEVC_MAX_DPB_SIZE - 1,                        1, i);

  812.         ues(sps_max_num_reorder_pics[i],

  813.             0, current->sps_max_dec_pic_buffering_minus1[i], 1, i);

  814.         ues(sps_max_latency_increase_plus1[i],

  815.             0, UINT32_MAX - 1,                               1, i);

  816.     }

  817.     if (!current->sps_sub_layer_ordering_info_present_flag) {

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

  819.             infer(sps_max_dec_pic_buffering_minus1[i],

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

  821.             infer(sps_max_num_reorder_pics[i],

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

  823.             infer(sps_max_latency_increase_plus1[i],

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

  825.         }

  826.     }

  827. 

  828.     ue(log2_min_luma_coding_block_size_minus3,   0, 3);

  829.     min_cb_log2_size_y = current->log2_min_luma_coding_block_size_minus3 + 3;

  830. 

  831.     ue(log2_diff_max_min_luma_coding_block_size, 0, 3);

  832.     ctb_log2_size_y = min_cb_log2_size_y +

  833.         current->log2_diff_max_min_luma_coding_block_size;

  834. 

  835.     min_cb_size_y = 1 << min_cb_log2_size_y;

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

  837.         current->pic_height_in_luma_samples % min_cb_size_y) {

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

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

  840.                current->pic_height_in_luma_samples, min_cb_size_y);

  841.         return AVERROR_INVALIDDATA;

  842.     }

  843. 

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

  845.     min_tb_log2_size_y = current->log2_min_luma_transform_block_size_minus2 + 2;

  846. 

  847.     ue(log2_diff_max_min_luma_transform_block_size,

  848.        0, FFMIN(ctb_log2_size_y, 5) - min_tb_log2_size_y);

  849. 

  850.     ue(max_transform_hierarchy_depth_inter,

  851.        0, ctb_log2_size_y - min_tb_log2_size_y);

  852.     ue(max_transform_hierarchy_depth_intra,

  853.        0, ctb_log2_size_y - min_tb_log2_size_y);

  854. 

  855.     flag(scaling_list_enabled_flag);

  856.     if (current->scaling_list_enabled_flag) {

  857.         flag(sps_scaling_list_data_present_flag);

  858.         if (current->sps_scaling_list_data_present_flag)

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

  860.     } else {

  861.         infer(sps_scaling_list_data_present_flag, 0);

  862.     }

  863. 

  864.     flag(amp_enabled_flag);

  865.     flag(sample_adaptive_offset_enabled_flag);

  866. 

  867.     flag(pcm_enabled_flag);

  868.     if (current->pcm_enabled_flag) {

  869.         u(4, pcm_sample_bit_depth_luma_minus1,

  870.           0, current->bit_depth_luma_minus8 + 8 - 1);

  871.         u(4, pcm_sample_bit_depth_chroma_minus1,

  872.           0, current->bit_depth_chroma_minus8 + 8 - 1);

  873. 

  874.         ue(log2_min_pcm_luma_coding_block_size_minus3,

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

  876.         ue(log2_diff_max_min_pcm_luma_coding_block_size,

  877.            0, FFMIN(ctb_log2_size_y, 5) - (current->log2_min_pcm_luma_coding_block_size_minus3 + 3));

  878. 

  879.         flag(pcm_loop_filter_disabled_flag);

  880.     }

  881. 

  882.     ue(num_short_term_ref_pic_sets, 0, HEVC_MAX_SHORT_TERM_REF_PIC_SETS);

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

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

  885. 

  886.     flag(long_term_ref_pics_present_flag);

  887.     if (current->long_term_ref_pics_present_flag) {

  888.         ue(num_long_term_ref_pics_sps, 0, HEVC_MAX_LONG_TERM_REF_PICS);

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

  890.             us(current->log2_max_pic_order_cnt_lsb_minus4 + 4,

  891.                lt_ref_pic_poc_lsb_sps[i],

  892.                0, MAX_UINT_BITS(current->log2_max_pic_order_cnt_lsb_minus4 + 4), 1, i);

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

  894.         }

  895.     }

  896. 

  897.     flag(sps_temporal_mvp_enabled_flag);

  898.     flag(strong_intra_smoothing_enabled_flag);

  899. 

  900.     flag(vui_parameters_present_flag);

  901.     if (current->vui_parameters_present_flag)

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

  903. 

  904.     flag(sps_extension_present_flag);

  905.     if (current->sps_extension_present_flag) {

  906.         flag(sps_range_extension_flag);

  907.         flag(sps_multilayer_extension_flag);

  908.         flag(sps_3d_extension_flag);

  909.         flag(sps_scc_extension_flag);

  910.         u(4, sps_extension_4bits, 0, MAX_UINT_BITS(4));

  911.     }

  912. 

  913.     if (current->sps_range_extension_flag)

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

  915.     if (current->sps_multilayer_extension_flag)

  916.         return AVERROR_PATCHWELCOME;

  917.     if (current->sps_3d_extension_flag)

  918.         return AVERROR_PATCHWELCOME;

  919.     if (current->sps_scc_extension_flag)

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

  921.     if (current->sps_extension_4bits)

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

  923. 

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

  925. 

  926.     return 0;

  927. }

  928. 

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

  930.                                      H265RawPPS *current)

  931. {

  932.     CodedBitstreamH265Context *h265 = ctx->priv_data;

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

  934.     int err, i;

  935. 

  936.     if (current->transform_skip_enabled_flag)

  937.         ue(log2_max_transform_skip_block_size_minus2, 0, 3);

  938.     flag(cross_component_prediction_enabled_flag);

  939. 

  940.     flag(chroma_qp_offset_list_enabled_flag);

  941.     if (current->chroma_qp_offset_list_enabled_flag) {

  942.         ue(diff_cu_chroma_qp_offset_depth,

  943.            0, sps->log2_diff_max_min_luma_coding_block_size);

  944.         ue(chroma_qp_offset_list_len_minus1, 0, 5);

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

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

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

  948.         }

  949.     }

  950. 

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

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

  953. 

  954.     return 0;

  955. }

  956. 

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

  958.                                    H265RawPPS *current)

  959. {

  960.     int err, comp, i;

  961. 

  962.     flag(pps_curr_pic_ref_enabled_flag);

  963. 

  964.     flag(residual_adaptive_colour_transform_enabled_flag);

  965.     if (current->residual_adaptive_colour_transform_enabled_flag) {

  966.         flag(pps_slice_act_qp_offsets_present_flag);

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

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

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

  970.     } else {

  971.         infer(pps_slice_act_qp_offsets_present_flag, 0);

  972.         infer(pps_act_y_qp_offset_plus5,  0);

  973.         infer(pps_act_cb_qp_offset_plus5, 0);

  974.         infer(pps_act_cr_qp_offset_plus3, 0);

  975.     }

  976. 

  977.     flag(pps_palette_predictor_initializer_present_flag);

  978.     if (current->pps_palette_predictor_initializer_present_flag) {

  979.         ue(pps_num_palette_predictor_initializer, 0, 128);

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

  981.             flag(monochrome_palette_flag);

  982.             ue(luma_bit_depth_entry_minus8, 0, 8);

  983.             if (!current->monochrome_palette_flag)

  984.                 ue(chroma_bit_depth_entry_minus8, 0, 8);

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

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

  987.                                           : current->chroma_bit_depth_entry_minus8 + 8;

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

  989.                     us(bit_depth, pps_palette_predictor_initializers[comp][i],

  990.                        0, MAX_UINT_BITS(bit_depth), 2, comp, i);

  991.             }

  992.         }

  993.     }

  994. 

  995.     return 0;

  996. }

  997. 

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

  999.                      H265RawPPS *current)

  1000. {

  1001.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  1002.     const H265RawSPS *sps;

  1003.     int err, i;

  1004. 

  1005.     HEADER("Picture Parameter Set");

  1006. 

  1007.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_PPS));

  1008. 

  1009.     ue(pps_pic_parameter_set_id, 0, 63);

  1010.     ue(pps_seq_parameter_set_id, 0, 15);

  1011.     sps = h265->sps[current->pps_seq_parameter_set_id];

  1012.     if (!sps) {

  1013.         av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",

  1014.                current->pps_seq_parameter_set_id);

  1015.         return AVERROR_INVALIDDATA;

  1016.     }

  1017.     h265->active_sps = sps;

  1018. 

  1019.     flag(dependent_slice_segments_enabled_flag);

  1020.     flag(output_flag_present_flag);

  1021.     u(3, num_extra_slice_header_bits, 0, 7);

  1022.     flag(sign_data_hiding_enabled_flag);

  1023.     flag(cabac_init_present_flag);

  1024. 

  1025.     ue(num_ref_idx_l0_default_active_minus1, 0, 14);

  1026.     ue(num_ref_idx_l1_default_active_minus1, 0, 14);

  1027. 

  1028.     se(init_qp_minus26, -(26 + 6 * sps->bit_depth_luma_minus8), +25);

  1029. 

  1030.     flag(constrained_intra_pred_flag);

  1031.     flag(transform_skip_enabled_flag);

  1032.     flag(cu_qp_delta_enabled_flag);

  1033.     if (current->cu_qp_delta_enabled_flag)

  1034.         ue(diff_cu_qp_delta_depth,

  1035.            0, sps->log2_diff_max_min_luma_coding_block_size);

  1036.     else

  1037.         infer(diff_cu_qp_delta_depth, 0);

  1038. 

  1039.     se(pps_cb_qp_offset, -12, +12);

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

  1041.     flag(pps_slice_chroma_qp_offsets_present_flag);

  1042. 

  1043.     flag(weighted_pred_flag);

  1044.     flag(weighted_bipred_flag);

  1045. 

  1046.     flag(transquant_bypass_enabled_flag);

  1047.     flag(tiles_enabled_flag);

  1048.     flag(entropy_coding_sync_enabled_flag);

  1049. 

  1050.     if (current->tiles_enabled_flag) {

  1051.         ue(num_tile_columns_minus1, 0, HEVC_MAX_TILE_COLUMNS);

  1052.         ue(num_tile_rows_minus1,    0, HEVC_MAX_TILE_ROWS);

  1053.         flag(uniform_spacing_flag);

  1054.         if (!current->uniform_spacing_flag) {

  1055.             for (i = 0; i < current->num_tile_columns_minus1; i++)

  1056.                 ues(column_width_minus1[i], 0, sps->pic_width_in_luma_samples,  1, i);

  1057.             for (i = 0; i < current->num_tile_rows_minus1; i++)

  1058.                 ues(row_height_minus1[i],   0, sps->pic_height_in_luma_samples, 1, i);

  1059.         }

  1060.         flag(loop_filter_across_tiles_enabled_flag);

  1061.     } else {

  1062.         infer(num_tile_columns_minus1, 0);

  1063.         infer(num_tile_rows_minus1,    0);

  1064.     }

  1065. 

  1066.     flag(pps_loop_filter_across_slices_enabled_flag);

  1067.     flag(deblocking_filter_control_present_flag);

  1068.     if (current->deblocking_filter_control_present_flag) {

  1069.         flag(deblocking_filter_override_enabled_flag);

  1070.         flag(pps_deblocking_filter_disabled_flag);

  1071.         if (!current->pps_deblocking_filter_disabled_flag) {

  1072.             se(pps_beta_offset_div2, -6, +6);

  1073.             se(pps_tc_offset_div2,   -6, +6);

  1074.         } else {

  1075.             infer(pps_beta_offset_div2, 0);

  1076.             infer(pps_tc_offset_div2,   0);

  1077.         }

  1078.     } else {

  1079.         infer(deblocking_filter_override_enabled_flag, 0);

  1080.         infer(pps_deblocking_filter_disabled_flag,     0);

  1081.         infer(pps_beta_offset_div2, 0);

  1082.         infer(pps_tc_offset_div2,   0);

  1083.     }

  1084. 

  1085.     flag(pps_scaling_list_data_present_flag);

  1086.     if (current->pps_scaling_list_data_present_flag)

  1087.         CHECK(FUNC(scaling_list_data)(ctx, rw, &current->scaling_list));

  1088. 

  1089.     flag(lists_modification_present_flag);

  1090. 

  1091.     ue(log2_parallel_merge_level_minus2,

  1092.        0, (sps->log2_min_luma_coding_block_size_minus3 + 3 +

  1093.            sps->log2_diff_max_min_luma_coding_block_size - 2));

  1094. 

  1095.     flag(slice_segment_header_extension_present_flag);

  1096. 

  1097.     flag(pps_extension_present_flag);

  1098.     if (current->pps_extension_present_flag) {

  1099.         flag(pps_range_extension_flag);

  1100.         flag(pps_multilayer_extension_flag);

  1101.         flag(pps_3d_extension_flag);

  1102.         flag(pps_scc_extension_flag);

  1103.         u(4, pps_extension_4bits, 0, MAX_UINT_BITS(4));

  1104.     }

  1105.     if (current->pps_range_extension_flag)

  1106.         CHECK(FUNC(pps_range_extension)(ctx, rw, current));

  1107.     if (current->pps_multilayer_extension_flag)

  1108.         return AVERROR_PATCHWELCOME;

  1109.     if (current->pps_3d_extension_flag)

  1110.         return AVERROR_PATCHWELCOME;

  1111.     if (current->pps_scc_extension_flag)

  1112.         CHECK(FUNC(pps_scc_extension)(ctx, rw, current));

  1113.     if (current->pps_extension_4bits)

  1114.         CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));

  1115. 

  1116.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  1117. 

  1118.     return 0;

  1119. }

  1120. 

  1121. static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,

  1122.                      H265RawAUD *current)

  1123. {

  1124.     int err;

  1125. 

  1126.     HEADER("Access Unit Delimiter");

  1127. 

  1128.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_AUD));

  1129. 

  1130.     u(3, pic_type, 0, 2);

  1131. 

  1132.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  1133. 

  1134.     return 0;

  1135. }

  1136. 

  1137. static int FUNC(ref_pic_lists_modification)(CodedBitstreamContext *ctx, RWContext *rw,

  1138.                                             H265RawSliceHeader *current,

  1139.                                             unsigned int num_pic_total_curr)

  1140. {

  1141.     unsigned int entry_size;

  1142.     int err, i;

  1143. 

  1144.     entry_size = av_log2(num_pic_total_curr - 1) + 1;

  1145. 

  1146.     flag(ref_pic_list_modification_flag_l0);

  1147.     if (current->ref_pic_list_modification_flag_l0) {

  1148.         for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++)

  1149.             us(entry_size, list_entry_l0[i], 0, num_pic_total_curr - 1, 1, i);

  1150.     }

  1151. 

  1152.     if (current->slice_type == HEVC_SLICE_B) {

  1153.         flag(ref_pic_list_modification_flag_l1);

  1154.         if (current->ref_pic_list_modification_flag_l1) {

  1155.             for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++)

  1156.                 us(entry_size, list_entry_l1[i], 0, num_pic_total_curr - 1, 1, i);

  1157.         }

  1158.     }

  1159. 

  1160.     return 0;

  1161. }

  1162. 

  1163. static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,

  1164.                                    H265RawSliceHeader *current)

  1165. {

  1166.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  1167.     const H265RawSPS *sps = h265->active_sps;

  1168.     int err, i, j;

  1169.     int chroma = !sps->separate_colour_plane_flag &&

  1170.                   sps->chroma_format_idc != 0;

  1171. 

  1172.     ue(luma_log2_weight_denom, 0, 7);

  1173.     if (chroma)

  1174.         se(delta_chroma_log2_weight_denom, -7, 7);

  1175.     else

  1176.         infer(delta_chroma_log2_weight_denom, 0);

  1177. 

  1178.     for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {

  1179.         if (1 /* is not same POC and same layer_id */)

  1180.             flags(luma_weight_l0_flag[i], 1, i);

  1181.         else

  1182.             infer(luma_weight_l0_flag[i], 0);

  1183.     }

  1184.     if (chroma) {

  1185.         for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {

  1186.             if (1 /* is not same POC and same layer_id */)

  1187.                 flags(chroma_weight_l0_flag[i], 1, i);

  1188.             else

  1189.                 infer(chroma_weight_l0_flag[i], 0);

  1190.         }

  1191.     }

  1192. 

  1193.     for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {

  1194.         if (current->luma_weight_l0_flag[i]) {

  1195.             ses(delta_luma_weight_l0[i], -128, +127, 1, i);

  1196.             ses(luma_offset_l0[i],

  1197.                 -(1 << (sps->bit_depth_luma_minus8 + 8 - 1)),

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

  1199.         } else {

  1200.             infer(delta_luma_weight_l0[i], 0);

  1201.             infer(luma_offset_l0[i],       0);

  1202.         }

  1203.         if (current->chroma_weight_l0_flag[i]) {

  1204.             for (j = 0; j < 2; j++) {

  1205.                 ses(delta_chroma_weight_l0[i][j], -128, +127, 2, i, j);

  1206.                 ses(chroma_offset_l0[i][j],

  1207.                     -(4 << (sps->bit_depth_chroma_minus8 + 8 - 1)),

  1208.                     ((4 << (sps->bit_depth_chroma_minus8 + 8 - 1)) - 1), 2, i, j);

  1209.             }

  1210.         } else {

  1211.             for (j = 0; j < 2; j++) {

  1212.                 infer(delta_chroma_weight_l0[i][j], 0);

  1213.                 infer(chroma_offset_l0[i][j],       0);

  1214.             }

  1215.         }

  1216.     }

  1217. 

  1218.     if (current->slice_type == HEVC_SLICE_B) {

  1219.         for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {

  1220.             if (1 /* RefPicList1[i] is not CurrPic, nor is it in a different layer */)

  1221.                 flags(luma_weight_l1_flag[i], 1, i);

  1222.             else

  1223.                 infer(luma_weight_l1_flag[i], 0);

  1224.         }

  1225.         if (chroma) {

  1226.             for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {

  1227.                 if (1 /* RefPicList1[i] is not CurrPic, nor is it in a different layer */)

  1228.                     flags(chroma_weight_l1_flag[i], 1, i);

  1229.                 else

  1230.                     infer(chroma_weight_l1_flag[i], 0);

  1231.             }

  1232.         }

  1233. 

  1234.         for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {

  1235.             if (current->luma_weight_l1_flag[i]) {

  1236.                 ses(delta_luma_weight_l1[i], -128, +127, 1, i);

  1237.                 ses(luma_offset_l1[i],

  1238.                     -(1 << (sps->bit_depth_luma_minus8 + 8 - 1)),

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

  1240.             } else {

  1241.                 infer(delta_luma_weight_l1[i], 0);

  1242.                 infer(luma_offset_l1[i],       0);

  1243.             }

  1244.             if (current->chroma_weight_l1_flag[i]) {

  1245.                 for (j = 0; j < 2; j++) {

  1246.                     ses(delta_chroma_weight_l1[i][j], -128, +127, 2, i, j);

  1247.                     ses(chroma_offset_l1[i][j],

  1248.                         -(4 << (sps->bit_depth_chroma_minus8 + 8 - 1)),

  1249.                         ((4 << (sps->bit_depth_chroma_minus8 + 8 - 1)) - 1), 2, i, j);

  1250.                 }

  1251.             } else {

  1252.                 for (j = 0; j < 2; j++) {

  1253.                     infer(delta_chroma_weight_l1[i][j], 0);

  1254.                     infer(chroma_offset_l1[i][j],       0);

  1255.                 }

  1256.             }

  1257.         }

  1258.     }

  1259. 

  1260.     return 0;

  1261. }

  1262. 

  1263. static int FUNC(slice_segment_header)(CodedBitstreamContext *ctx, RWContext *rw,

  1264.                                       H265RawSliceHeader *current)

  1265. {

  1266.     CodedBitstreamH265Context *h265 = ctx->priv_data;

  1267.     const H265RawSPS *sps;

  1268.     const H265RawPPS *pps;

  1269.     unsigned int min_cb_log2_size_y, ctb_log2_size_y, ctb_size_y;

  1270.     unsigned int pic_width_in_ctbs_y, pic_height_in_ctbs_y, pic_size_in_ctbs_y;

  1271.     unsigned int num_pic_total_curr = 0;

  1272.     int err, i;

  1273. 

  1274.     HEADER("Slice Segment Header");

  1275. 

  1276.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, -1));

  1277. 

  1278.     flag(first_slice_segment_in_pic_flag);

  1279. 

  1280.     if (current->nal_unit_header.nal_unit_type >= HEVC_NAL_BLA_W_LP &&

  1281.         current->nal_unit_header.nal_unit_type <= HEVC_NAL_IRAP_VCL23)

  1282.         flag(no_output_of_prior_pics_flag);

  1283. 

  1284.     ue(slice_pic_parameter_set_id, 0, 63);

  1285. 

  1286.     pps = h265->pps[current->slice_pic_parameter_set_id];

  1287.     if (!pps) {

  1288.         av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",

  1289.                current->slice_pic_parameter_set_id);

  1290.         return AVERROR_INVALIDDATA;

  1291.     }

  1292.     h265->active_pps = pps;

  1293. 

  1294.     sps = h265->sps[pps->pps_seq_parameter_set_id];

  1295.     if (!sps) {

  1296.         av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",

  1297.                pps->pps_seq_parameter_set_id);

  1298.         return AVERROR_INVALIDDATA;

  1299.     }

  1300.     h265->active_sps = sps;

  1301. 

  1302.     min_cb_log2_size_y = sps->log2_min_luma_coding_block_size_minus3 + 3;

  1303.     ctb_log2_size_y = min_cb_log2_size_y + sps->log2_diff_max_min_luma_coding_block_size;

  1304.     ctb_size_y = 1 << ctb_log2_size_y;

  1305.     pic_width_in_ctbs_y =

  1306.         (sps->pic_width_in_luma_samples + ctb_size_y - 1) / ctb_size_y;

  1307.     pic_height_in_ctbs_y =

  1308.         (sps->pic_height_in_luma_samples + ctb_size_y - 1) / ctb_size_y;

  1309.     pic_size_in_ctbs_y = pic_width_in_ctbs_y * pic_height_in_ctbs_y;

  1310. 

  1311.     if (!current->first_slice_segment_in_pic_flag) {

  1312.         unsigned int address_size = av_log2(pic_size_in_ctbs_y - 1) + 1;

  1313.         if (pps->dependent_slice_segments_enabled_flag)

  1314.             flag(dependent_slice_segment_flag);

  1315.         else

  1316.             infer(dependent_slice_segment_flag, 0);

  1317.         u(address_size, slice_segment_address, 0, pic_size_in_ctbs_y - 1);

  1318.     } else {

  1319.         infer(dependent_slice_segment_flag, 0);

  1320.     }

  1321. 

  1322.     if (!current->dependent_slice_segment_flag) {

  1323.         for (i = 0; i < pps->num_extra_slice_header_bits; i++)

  1324.             flags(slice_reserved_flag[i], 1, i);

  1325. 

  1326.         ue(slice_type, 0, 2);

  1327. 

  1328.         if (pps->output_flag_present_flag)

  1329.             flag(pic_output_flag);

  1330. 

  1331.         if (sps->separate_colour_plane_flag)

  1332.             u(2, colour_plane_id, 0, 2);

  1333. 

  1334.         if (current->nal_unit_header.nal_unit_type != HEVC_NAL_IDR_W_RADL &&

  1335.             current->nal_unit_header.nal_unit_type != HEVC_NAL_IDR_N_LP) {

  1336.             const H265RawSTRefPicSet *rps;

  1337. 

  1338.             u(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, slice_pic_order_cnt_lsb,

  1339.               0, MAX_UINT_BITS(sps->log2_max_pic_order_cnt_lsb_minus4 + 4));

  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.                         us(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, poc_lsb_lt[i],

  1386.                            0, MAX_UINT_BITS(sps->log2_max_pic_order_cnt_lsb_minus4 + 4), 1, i);

  1387.                         flags(used_by_curr_pic_lt_flag[i], 1, i);

  1388.                         if (current->used_by_curr_pic_lt_flag[i])

  1389.                             ++num_pic_total_curr;

  1390.                     }

  1391.                     flags(delta_poc_msb_present_flag[i], 1, i);

  1392.                     if (current->delta_poc_msb_present_flag[i])

  1393.                         ues(delta_poc_msb_cycle_lt[i], 0, UINT32_MAX - 1, 1, i);

  1394.                     else

  1395.                         infer(delta_poc_msb_cycle_lt[i], 0);

  1396.                 }

  1397.             }

  1398. 

  1399.             if (sps->sps_temporal_mvp_enabled_flag)

  1400.                 flag(slice_temporal_mvp_enabled_flag);

  1401.             else

  1402.                 infer(slice_temporal_mvp_enabled_flag, 0);

  1403. 

  1404.             if (pps->pps_curr_pic_ref_enabled_flag)

  1405.                 ++num_pic_total_curr;

  1406.         }

  1407. 

  1408.         if (sps->sample_adaptive_offset_enabled_flag) {

  1409.             flag(slice_sao_luma_flag);

  1410.             if (!sps->separate_colour_plane_flag && sps->chroma_format_idc != 0)

  1411.                 flag(slice_sao_chroma_flag);

  1412.             else

  1413.                 infer(slice_sao_chroma_flag, 0);

  1414.         } else {

  1415.             infer(slice_sao_luma_flag,   0);

  1416.             infer(slice_sao_chroma_flag, 0);

  1417.         }

  1418. 

  1419.         if (current->slice_type == HEVC_SLICE_P ||

  1420.             current->slice_type == HEVC_SLICE_B) {

  1421.             flag(num_ref_idx_active_override_flag);

  1422.             if (current->num_ref_idx_active_override_flag) {

  1423.                 ue(num_ref_idx_l0_active_minus1, 0, 14);

  1424.                 if (current->slice_type == HEVC_SLICE_B)

  1425.                     ue(num_ref_idx_l1_active_minus1, 0, 14);

  1426.                 else

  1427.                     infer(num_ref_idx_l1_active_minus1, pps->num_ref_idx_l1_default_active_minus1);

  1428.             } else {

  1429.                 infer(num_ref_idx_l0_active_minus1, pps->num_ref_idx_l0_default_active_minus1);

  1430.                 infer(num_ref_idx_l1_active_minus1, pps->num_ref_idx_l1_default_active_minus1);

  1431.             }

  1432. 

  1433.             if (pps->lists_modification_present_flag && num_pic_total_curr > 1)

  1434.                 CHECK(FUNC(ref_pic_lists_modification)(ctx, rw, current,

  1435.                                                        num_pic_total_curr));

  1436. 

  1437.             if (current->slice_type == HEVC_SLICE_B)

  1438.                 flag(mvd_l1_zero_flag);

  1439.             if (pps->cabac_init_present_flag)

  1440.                 flag(cabac_init_flag);

  1441.             else

  1442.                 infer(cabac_init_flag, 0);

  1443.             if (current->slice_temporal_mvp_enabled_flag) {

  1444.                 if (current->slice_type == HEVC_SLICE_B)

  1445.                     flag(collocated_from_l0_flag);

  1446.                 else

  1447.                     infer(collocated_from_l0_flag, 1);

  1448.                 if (current->collocated_from_l0_flag) {

  1449.                     if (current->num_ref_idx_l0_active_minus1 > 0)

  1450.                         ue(collocated_ref_idx, 0, current->num_ref_idx_l0_active_minus1);

  1451.                     else

  1452.                         infer(collocated_ref_idx, 0);

  1453.                 } else {

  1454.                     if (current->num_ref_idx_l1_active_minus1 > 0)

  1455.                         ue(collocated_ref_idx, 0, current->num_ref_idx_l1_active_minus1);

  1456.                     else

  1457.                         infer(collocated_ref_idx, 0);

  1458.                 }

  1459.             }

  1460. 

  1461.             if ((pps->weighted_pred_flag   && current->slice_type == HEVC_SLICE_P) ||

  1462.                 (pps->weighted_bipred_flag && current->slice_type == HEVC_SLICE_B))

  1463.                 CHECK(FUNC(pred_weight_table)(ctx, rw, current));

  1464. 

  1465.             ue(five_minus_max_num_merge_cand, 0, 4);

  1466.             if (sps->motion_vector_resolution_control_idc == 2)

  1467.                 flag(use_integer_mv_flag);

  1468.             else

  1469.                 infer(use_integer_mv_flag, sps->motion_vector_resolution_control_idc);

  1470.         }

  1471. 

  1472.         se(slice_qp_delta,

  1473.            - 6 * sps->bit_depth_luma_minus8 - (pps->init_qp_minus26 + 26),

  1474.            + 51 - (pps->init_qp_minus26 + 26));

  1475.         if (pps->pps_slice_chroma_qp_offsets_present_flag) {

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

  1477.             se(slice_cr_qp_offset, -12, +12);

  1478.         } else {

  1479.             infer(slice_cb_qp_offset, 0);

  1480.             infer(slice_cr_qp_offset, 0);

  1481.         }

  1482.         if (pps->pps_slice_act_qp_offsets_present_flag) {

  1483.             se(slice_act_y_qp_offset,

  1484.                -12 - (pps->pps_act_y_qp_offset_plus5 - 5),

  1485.                +12 - (pps->pps_act_y_qp_offset_plus5 - 5));

  1486.             se(slice_act_cb_qp_offset,

  1487.                -12 - (pps->pps_act_cb_qp_offset_plus5 - 5),

  1488.                +12 - (pps->pps_act_cb_qp_offset_plus5 - 5));

  1489.             se(slice_act_cr_qp_offset,

  1490.                -12 - (pps->pps_act_cr_qp_offset_plus3 - 3),

  1491.                +12 - (pps->pps_act_cr_qp_offset_plus3 - 3));

  1492.         } else {

  1493.             infer(slice_act_y_qp_offset,  0);

  1494.             infer(slice_act_cb_qp_offset, 0);

  1495.             infer(slice_act_cr_qp_offset, 0);

  1496.         }

  1497.         if (pps->chroma_qp_offset_list_enabled_flag)

  1498.             flag(cu_chroma_qp_offset_enabled_flag);

  1499.         else

  1500.             infer(cu_chroma_qp_offset_enabled_flag, 0);

  1501. 

  1502.         if (pps->deblocking_filter_override_enabled_flag)

  1503.             flag(deblocking_filter_override_flag);

  1504.         else

  1505.             infer(deblocking_filter_override_flag, 0);

  1506.         if (current->deblocking_filter_override_flag) {

  1507.             flag(slice_deblocking_filter_disabled_flag);

  1508.             if (!current->slice_deblocking_filter_disabled_flag) {

  1509.                 se(slice_beta_offset_div2, -6, +6);

  1510.                 se(slice_tc_offset_div2,   -6, +6);

  1511.             } else {

  1512.                 infer(slice_beta_offset_div2, pps->pps_beta_offset_div2);

  1513.                 infer(slice_tc_offset_div2,   pps->pps_tc_offset_div2);

  1514.             }

  1515.         } else {

  1516.             infer(slice_deblocking_filter_disabled_flag,

  1517.                   pps->pps_deblocking_filter_disabled_flag);

  1518.             infer(slice_beta_offset_div2, pps->pps_beta_offset_div2);

  1519.             infer(slice_tc_offset_div2,   pps->pps_tc_offset_div2);

  1520.         }

  1521.         if (pps->pps_loop_filter_across_slices_enabled_flag &&

  1522.             (current->slice_sao_luma_flag || current->slice_sao_chroma_flag ||

  1523.              !current->slice_deblocking_filter_disabled_flag))

  1524.             flag(slice_loop_filter_across_slices_enabled_flag);

  1525.         else

  1526.             infer(slice_loop_filter_across_slices_enabled_flag,

  1527.                   pps->pps_loop_filter_across_slices_enabled_flag);

  1528.     }

  1529. 

  1530.     if (pps->tiles_enabled_flag || pps->entropy_coding_sync_enabled_flag) {

  1531.         unsigned int num_entry_point_offsets_limit;

  1532.         if (!pps->tiles_enabled_flag && pps->entropy_coding_sync_enabled_flag)

  1533.             num_entry_point_offsets_limit = pic_height_in_ctbs_y - 1;

  1534.         else if (pps->tiles_enabled_flag && !pps->entropy_coding_sync_enabled_flag)

  1535.             num_entry_point_offsets_limit =

  1536.                 (pps->num_tile_columns_minus1 + 1) * (pps->num_tile_rows_minus1 + 1);

  1537.         else

  1538.             num_entry_point_offsets_limit =

  1539.                 (pps->num_tile_columns_minus1 + 1) * pic_height_in_ctbs_y - 1;

  1540.         ue(num_entry_point_offsets, 0, num_entry_point_offsets_limit);

  1541. 

  1542.         if (current->num_entry_point_offsets > HEVC_MAX_ENTRY_POINT_OFFSETS) {

  1543.             av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many entry points: "

  1544.                    "%"PRIu16".\n", current->num_entry_point_offsets);

  1545.             return AVERROR_PATCHWELCOME;

  1546.         }

  1547. 

  1548.         if (current->num_entry_point_offsets > 0) {

  1549.             ue(offset_len_minus1, 0, 31);

  1550.             for (i = 0; i < current->num_entry_point_offsets; i++)

  1551.                 us(current->offset_len_minus1 + 1, entry_point_offset_minus1[i],

  1552.                    0, MAX_UINT_BITS(current->offset_len_minus1 + 1), 1, i);

  1553.         }

  1554.     }

  1555. 

  1556.     if (pps->slice_segment_header_extension_present_flag) {

  1557.         ue(slice_segment_header_extension_length, 0, 256);

  1558.         for (i = 0; i < current->slice_segment_header_extension_length; i++)

  1559.             us(8, slice_segment_header_extension_data_byte[i], 0x00, 0xff, 1, i);

  1560.     }

  1561. 

  1562.     CHECK(FUNC(byte_alignment)(ctx, rw));

  1563. 

  1564.     return 0;

  1565. }

  1566. 

  1567. static int FUNC(sei_mastering_display)(CodedBitstreamContext *ctx, RWContext *rw,

  1568.                                        H265RawSEIMasteringDisplayColourVolume *current)

  1569. {

  1570.     int err, c;

  1571. 

  1572.     for (c = 0; c < 3; c++) {

  1573.         us(16, display_primaries_x[c], 0, 50000, 1, c);

  1574.         us(16, display_primaries_y[c], 0, 50000, 1, c);

  1575.     }

  1576. 

  1577.     u(16, white_point_x, 0, 50000);

  1578.     u(16, white_point_y, 0, 50000);

  1579. 

  1580.     u(32, max_display_mastering_luminance,

  1581.       1, MAX_UINT_BITS(32));

  1582.     u(32, min_display_mastering_luminance,

  1583.       0, current->max_display_mastering_luminance - 1);

  1584. 

  1585.     return 0;

  1586. }

  1587. 

  1588. static int FUNC(sei_content_light_level)(CodedBitstreamContext *ctx, RWContext *rw,

  1589.                                          H265RawSEIContentLightLevelInfo *current)

  1590. {

  1591.     int err;

  1592. 

  1593.     u(16, max_content_light_level, 0, MAX_UINT_BITS(16));

  1594.     u(16, max_pic_average_light_level, 0, MAX_UINT_BITS(16));

  1595. 

  1596.     return 0;

  1597. }

  1598. 

  1599. static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,

  1600.                              H265RawSEIPayload *current)

  1601. {

  1602.     int err, i;

  1603.     int start_position, end_position;

  1604. 

  1605. #ifdef READ

  1606.     start_position = get_bits_count(rw);

  1607. #else

  1608.     start_position = put_bits_count(rw);

  1609. #endif

  1610. 

  1611.     switch (current->payload_type) {

  1612.     case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:

  1613.         CHECK(FUNC(sei_mastering_display)

  1614.               (ctx, rw, &current->payload.mastering_display));

  1615. 

  1616.         break;

  1617. 

  1618.     case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:

  1619.         CHECK(FUNC(sei_content_light_level)

  1620.               (ctx, rw, &current->payload.content_light_level));

  1621. 

  1622.         break;

  1623. 

  1624.     default:

  1625.         {

  1626. #ifdef READ

  1627.             current->payload.other.data_length = current->payload_size;

  1628. #endif

  1629.             allocate(current->payload.other.data, current->payload.other.data_length);

  1630. 

  1631.             for (i = 0; i < current->payload_size; i++)

  1632.                 xu(8, payload_byte[i], current->payload.other.data[i], 0, 255,

  1633.                    1, i);

  1634.         }

  1635.     }

  1636. 

  1637.     if (byte_alignment(rw)) {

  1638.         fixed(1, bit_equal_to_one, 1);

  1639.         while (byte_alignment(rw))

  1640.             fixed(1, bit_equal_to_zero, 0);

  1641.     }

  1642. 

  1643. #ifdef READ

  1644.     end_position = get_bits_count(rw);

  1645.     if (end_position < start_position + 8 * current->payload_size) {

  1646.         av_log(ctx->log_ctx, AV_LOG_ERROR, "Incorrect SEI payload length: "

  1647.                "header %"PRIu32" bits, actually %d bits.\n",

  1648.                8 * current->payload_size,

  1649.                end_position - start_position);

  1650.         return AVERROR_INVALIDDATA;

  1651.     }

  1652. #else

  1653.     end_position = put_bits_count(rw);

  1654.     current->payload_size = (end_position - start_position) >> 3;

  1655. #endif

  1656. 

  1657.     return 0;

  1658. }

  1659. 

  1660. static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,

  1661.                      H265RawSEI *current)

  1662. {

  1663.     int err, k;

  1664. 

  1665.     HEADER("Supplemental Enhancement Information");

  1666. 

  1667.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,

  1668.                                 HEVC_NAL_SEI_PREFIX));

  1669. 

  1670. #ifdef READ

  1671.     for (k = 0; k < H265_MAX_SEI_PAYLOADS; k++) {

  1672.         uint32_t payload_type = 0;

  1673.         uint32_t payload_size = 0;

  1674.         uint32_t tmp;

  1675. 

  1676.         while (show_bits(rw, 8) == 0xff) {

  1677.             fixed(8, ff_byte, 0xff);

  1678.             payload_type += 255;

  1679.         }

  1680.         xu(8, last_payload_type_byte, tmp, 0, 254, 0);

  1681.         payload_type += tmp;

  1682. 

  1683.         while (show_bits(rw, 8) == 0xff) {

  1684.             fixed(8, ff_byte, 0xff);

  1685.             payload_size += 255;

  1686.         }

  1687.         xu(8, last_payload_size_byte, tmp, 0, 254, 0);

  1688.         payload_size += tmp;

  1689. 

  1690.         current->payload[k].payload_type = payload_type;

  1691.         current->payload[k].payload_size = payload_size;

  1692. 

  1693.         CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k]));

  1694. 

  1695.         if (!cbs_h2645_read_more_rbsp_data(rw))

  1696.             break;

  1697.     }

  1698.     if (k >= H265_MAX_SEI_PAYLOADS) {

  1699.         av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many payloads in "

  1700.                "SEI message: found %d.\n", k);

  1701.         return AVERROR_INVALIDDATA;

  1702.     }

  1703.     current->payload_count = k + 1;

  1704. #else

  1705.     for (k = 0; k < current->payload_count; k++) {

  1706.         PutBitContext start_state;

  1707.         uint32_t tmp;

  1708.         int need_size, i;

  1709. 

  1710.         // Somewhat clumsy: we write the payload twice when

  1711.         // we don't know the size in advance.  This will mess

  1712.         // with trace output, but is otherwise harmless.

  1713.         start_state = *rw;

  1714.         need_size = !current->payload[k].payload_size;

  1715.         for (i = 0; i < 1 + need_size; i++) {

  1716.             *rw = start_state;

  1717. 

  1718.             tmp = current->payload[k].payload_type;

  1719.             while (tmp >= 255) {

  1720.                 fixed(8, ff_byte, 0xff);

  1721.                 tmp -= 255;

  1722.             }

  1723.             xu(8, last_payload_type_byte, tmp, 0, 254, 0);

  1724. 

  1725.             tmp = current->payload[k].payload_size;

  1726.             while (tmp >= 255) {

  1727.                 fixed(8, ff_byte, 0xff);

  1728.                 tmp -= 255;

  1729.             }

  1730.             xu(8, last_payload_size_byte, tmp, 0, 254, 0);

  1731. 

  1732.             CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k]));

  1733.         }

  1734.     }

  1735. #endif

  1736. 

  1737.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  1738. 

  1739.     return 0;

  1740. }