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FFmpeg/libavcodec/cbs_h264_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.                                  H264RawNALUnitHeader *current,

  32.                                  uint32_t valid_type_mask)

  33. {

  34.     int err;

  35. 

  36.     fixed(1, forbidden_zero_bit, 0);

  37.     ub(2, nal_ref_idc);

  38.     ub(5, nal_unit_type);

  39. 

  40.     if (!(1 << current->nal_unit_type & valid_type_mask)) {

  41.         av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid NAL unit type %d.\n",

  42.                current->nal_unit_type);

  43.         return AVERROR_INVALIDDATA;

  44.     }

  45. 

  46.     if (current->nal_unit_type == 14 ||

  47.         current->nal_unit_type == 20 ||

  48.         current->nal_unit_type == 21) {

  49.         if (current->nal_unit_type != 21)

  50.             flag(svc_extension_flag);

  51.         else

  52.             flag(avc_3d_extension_flag);

  53. 

  54.         if (current->svc_extension_flag) {

  55.             av_log(ctx->log_ctx, AV_LOG_ERROR, "SVC not supported.\n");

  56.             return AVERROR_PATCHWELCOME;

  57. 

  58.         } else if (current->avc_3d_extension_flag) {

  59.             av_log(ctx->log_ctx, AV_LOG_ERROR, "3DAVC not supported.\n");

  60.             return AVERROR_PATCHWELCOME;

  61. 

  62.         } else {

  63.             av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC not supported.\n");

  64.             return AVERROR_PATCHWELCOME;

  65.         }

  66.     }

  67. 

  68.     return 0;

  69. }

  70. 

  71. static int FUNC(scaling_list)(CodedBitstreamContext *ctx, RWContext *rw,

  72.                               H264RawScalingList *current,

  73.                               int size_of_scaling_list)

  74. {

  75.     int err, i, scale;

  76. 

  77.     scale = 8;

  78.     for (i = 0; i < size_of_scaling_list; i++) {

  79.         ses(delta_scale[i], -128, +127, 1, i);

  80.         scale = (scale + current->delta_scale[i] + 256) % 256;

  81.         if (scale == 0)

  82.             break;

  83.     }

  84. 

  85.     return 0;

  86. }

  87. 

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

  89.                                 H264RawHRD *current)

  90. {

  91.     int err, i;

  92. 

  93.     ue(cpb_cnt_minus1, 0, 31);

  94.     ub(4, bit_rate_scale);

  95.     ub(4, cpb_size_scale);

  96. 

  97.     for (i = 0; i <= current->cpb_cnt_minus1; i++) {

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

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

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

  101.     }

  102. 

  103.     ub(5, initial_cpb_removal_delay_length_minus1);

  104.     ub(5, cpb_removal_delay_length_minus1);

  105.     ub(5, dpb_output_delay_length_minus1);

  106.     ub(5, time_offset_length);

  107. 

  108.     return 0;

  109. }

  110. 

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

  112.                                 H264RawVUI *current, H264RawSPS *sps)

  113. {

  114.     int err;

  115. 

  116.     flag(aspect_ratio_info_present_flag);

  117.     if (current->aspect_ratio_info_present_flag) {

  118.         ub(8, aspect_ratio_idc);

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

  120.             ub(16, sar_width);

  121.             ub(16, sar_height);

  122.         }

  123.     } else {

  124.         infer(aspect_ratio_idc, 0);

  125.     }

  126. 

  127.     flag(overscan_info_present_flag);

  128.     if (current->overscan_info_present_flag)

  129.         flag(overscan_appropriate_flag);

  130. 

  131.     flag(video_signal_type_present_flag);

  132.     if (current->video_signal_type_present_flag) {

  133.         ub(3, video_format);

  134.         flag(video_full_range_flag);

  135.         flag(colour_description_present_flag);

  136.         if (current->colour_description_present_flag) {

  137.             ub(8, colour_primaries);

  138.             ub(8, transfer_characteristics);

  139.             ub(8, matrix_coefficients);

  140.         } else {

  141.             infer(colour_primaries,         2);

  142.             infer(transfer_characteristics, 2);

  143.             infer(matrix_coefficients,      2);

  144.         }

  145.     } else {

  146.         infer(video_format,             5);

  147.         infer(video_full_range_flag,    0);

  148.         infer(colour_primaries,         2);

  149.         infer(transfer_characteristics, 2);

  150.         infer(matrix_coefficients,      2);

  151.     }

  152. 

  153.     flag(chroma_loc_info_present_flag);

  154.     if (current->chroma_loc_info_present_flag) {

  155.         ue(chroma_sample_loc_type_top_field,    0, 5);

  156.         ue(chroma_sample_loc_type_bottom_field, 0, 5);

  157.     } else {

  158.         infer(chroma_sample_loc_type_top_field,    0);

  159.         infer(chroma_sample_loc_type_bottom_field, 0);

  160.     }

  161. 

  162.     flag(timing_info_present_flag);

  163.     if (current->timing_info_present_flag) {

  164.         u(32, num_units_in_tick, 1, UINT32_MAX);

  165.         u(32, time_scale,        1, UINT32_MAX);

  166.         flag(fixed_frame_rate_flag);

  167.     } else {

  168.         infer(fixed_frame_rate_flag, 0);

  169.     }

  170. 

  171.     flag(nal_hrd_parameters_present_flag);

  172.     if (current->nal_hrd_parameters_present_flag)

  173.         CHECK(FUNC(hrd_parameters)(ctx, rw, &current->nal_hrd_parameters));

  174. 

  175.     flag(vcl_hrd_parameters_present_flag);

  176.     if (current->vcl_hrd_parameters_present_flag)

  177.         CHECK(FUNC(hrd_parameters)(ctx, rw, &current->vcl_hrd_parameters));

  178. 

  179.     if (current->nal_hrd_parameters_present_flag ||

  180.         current->vcl_hrd_parameters_present_flag)

  181.         flag(low_delay_hrd_flag);

  182.     else

  183.         infer(low_delay_hrd_flag, 1 - current->fixed_frame_rate_flag);

  184. 

  185.     flag(pic_struct_present_flag);

  186. 

  187.     flag(bitstream_restriction_flag);

  188.     if (current->bitstream_restriction_flag) {

  189.         flag(motion_vectors_over_pic_boundaries_flag);

  190.         ue(max_bytes_per_pic_denom, 0, 16);

  191.         ue(max_bits_per_mb_denom,   0, 16);

  192.         // The current version of the standard constrains this to be in

  193.         // [0,15], but older versions allow 16.

  194.         ue(log2_max_mv_length_horizontal, 0, 16);

  195.         ue(log2_max_mv_length_vertical,   0, 16);

  196.         ue(max_num_reorder_frames,  0, H264_MAX_DPB_FRAMES);

  197.         ue(max_dec_frame_buffering, 0, H264_MAX_DPB_FRAMES);

  198.     } else {

  199.         infer(motion_vectors_over_pic_boundaries_flag, 1);

  200.         infer(max_bytes_per_pic_denom, 2);

  201.         infer(max_bits_per_mb_denom,   1);

  202.         infer(log2_max_mv_length_horizontal, 15);

  203.         infer(log2_max_mv_length_vertical,   15);

  204. 

  205.         if ((sps->profile_idc ==  44 || sps->profile_idc ==  86 ||

  206.              sps->profile_idc == 100 || sps->profile_idc == 110 ||

  207.              sps->profile_idc == 122 || sps->profile_idc == 244) &&

  208.             sps->constraint_set3_flag) {

  209.             infer(max_num_reorder_frames,  0);

  210.             infer(max_dec_frame_buffering, 0);

  211.         } else {

  212.             infer(max_num_reorder_frames,  H264_MAX_DPB_FRAMES);

  213.             infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES);

  214.         }

  215.     }

  216. 

  217.     return 0;

  218. }

  219. 

  220. static int FUNC(vui_parameters_default)(CodedBitstreamContext *ctx,

  221.                                         RWContext *rw, H264RawVUI *current,

  222.                                         H264RawSPS *sps)

  223. {

  224.     infer(aspect_ratio_idc, 0);

  225. 

  226.     infer(video_format,             5);

  227.     infer(video_full_range_flag,    0);

  228.     infer(colour_primaries,         2);

  229.     infer(transfer_characteristics, 2);

  230.     infer(matrix_coefficients,      2);

  231. 

  232.     infer(chroma_sample_loc_type_top_field,    0);

  233.     infer(chroma_sample_loc_type_bottom_field, 0);

  234. 

  235.     infer(fixed_frame_rate_flag, 0);

  236.     infer(low_delay_hrd_flag,    1);

  237. 

  238.     infer(pic_struct_present_flag, 0);

  239. 

  240.     infer(motion_vectors_over_pic_boundaries_flag, 1);

  241.     infer(max_bytes_per_pic_denom, 2);

  242.     infer(max_bits_per_mb_denom,   1);

  243.     infer(log2_max_mv_length_horizontal, 15);

  244.     infer(log2_max_mv_length_vertical,   15);

  245. 

  246.     if ((sps->profile_idc ==  44 || sps->profile_idc ==  86 ||

  247.          sps->profile_idc == 100 || sps->profile_idc == 110 ||

  248.          sps->profile_idc == 122 || sps->profile_idc == 244) &&

  249.         sps->constraint_set3_flag) {

  250.         infer(max_num_reorder_frames,  0);

  251.         infer(max_dec_frame_buffering, 0);

  252.     } else {

  253.         infer(max_num_reorder_frames,  H264_MAX_DPB_FRAMES);

  254.         infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES);

  255.     }

  256. 

  257.     return 0;

  258. }

  259. 

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

  261.                      H264RawSPS *current)

  262. {

  263.     int err, i;

  264. 

  265.     HEADER("Sequence Parameter Set");

  266. 

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

  268.                                 1 << H264_NAL_SPS));

  269. 

  270.     ub(8, profile_idc);

  271. 

  272.     flag(constraint_set0_flag);

  273.     flag(constraint_set1_flag);

  274.     flag(constraint_set2_flag);

  275.     flag(constraint_set3_flag);

  276.     flag(constraint_set4_flag);

  277.     flag(constraint_set5_flag);

  278. 

  279.     u(2, reserved_zero_2bits,  0, 0);

  280. 

  281.     ub(8, level_idc);

  282. 

  283.     ue(seq_parameter_set_id, 0, 31);

  284. 

  285.     if (current->profile_idc == 100 || current->profile_idc == 110 ||

  286.         current->profile_idc == 122 || current->profile_idc == 244 ||

  287.         current->profile_idc ==  44 || current->profile_idc ==  83 ||

  288.         current->profile_idc ==  86 || current->profile_idc == 118 ||

  289.         current->profile_idc == 128 || current->profile_idc == 138) {

  290.         ue(chroma_format_idc, 0, 3);

  291. 

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

  293.             flag(separate_colour_plane_flag);

  294.         else

  295.             infer(separate_colour_plane_flag, 0);

  296. 

  297.         ue(bit_depth_luma_minus8,   0, 6);

  298.         ue(bit_depth_chroma_minus8, 0, 6);

  299. 

  300.         flag(qpprime_y_zero_transform_bypass_flag);

  301. 

  302.         flag(seq_scaling_matrix_present_flag);

  303.         if (current->seq_scaling_matrix_present_flag) {

  304.             for (i = 0; i < ((current->chroma_format_idc != 3) ? 8 : 12); i++) {

  305.                 flags(seq_scaling_list_present_flag[i], 1, i);

  306.                 if (current->seq_scaling_list_present_flag[i]) {

  307.                     if (i < 6)

  308.                         CHECK(FUNC(scaling_list)(ctx, rw,

  309.                                                  &current->scaling_list_4x4[i],

  310.                                                  16));

  311.                     else

  312.                         CHECK(FUNC(scaling_list)(ctx, rw,

  313.                                                  &current->scaling_list_8x8[i - 6],

  314.                                                  64));

  315.                 }

  316.             }

  317.         }

  318.     } else {

  319.         infer(chroma_format_idc, current->profile_idc == 183 ? 0 : 1);

  320. 

  321.         infer(separate_colour_plane_flag, 0);

  322.         infer(bit_depth_luma_minus8,      0);

  323.         infer(bit_depth_chroma_minus8,    0);

  324.     }

  325. 

  326.     ue(log2_max_frame_num_minus4, 0, 12);

  327.     ue(pic_order_cnt_type, 0, 2);

  328. 

  329.     if (current->pic_order_cnt_type == 0) {

  330.         ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12);

  331.     } else if (current->pic_order_cnt_type == 1) {

  332.         flag(delta_pic_order_always_zero_flag);

  333.         se(offset_for_non_ref_pic,         INT32_MIN + 1, INT32_MAX);

  334.         se(offset_for_top_to_bottom_field, INT32_MIN + 1, INT32_MAX);

  335.         ue(num_ref_frames_in_pic_order_cnt_cycle, 0, 255);

  336. 

  337.         for (i = 0; i < current->num_ref_frames_in_pic_order_cnt_cycle; i++)

  338.             ses(offset_for_ref_frame[i], INT32_MIN + 1, INT32_MAX, 1, i);

  339.     }

  340. 

  341.     ue(max_num_ref_frames, 0, H264_MAX_DPB_FRAMES);

  342.     flag(gaps_in_frame_num_allowed_flag);

  343. 

  344.     ue(pic_width_in_mbs_minus1,        0, H264_MAX_MB_WIDTH);

  345.     ue(pic_height_in_map_units_minus1, 0, H264_MAX_MB_HEIGHT);

  346. 

  347.     flag(frame_mbs_only_flag);

  348.     if (!current->frame_mbs_only_flag)

  349.         flag(mb_adaptive_frame_field_flag);

  350. 

  351.     flag(direct_8x8_inference_flag);

  352. 

  353.     flag(frame_cropping_flag);

  354.     if (current->frame_cropping_flag) {

  355.         ue(frame_crop_left_offset,   0, H264_MAX_WIDTH);

  356.         ue(frame_crop_right_offset,  0, H264_MAX_WIDTH);

  357.         ue(frame_crop_top_offset,    0, H264_MAX_HEIGHT);

  358.         ue(frame_crop_bottom_offset, 0, H264_MAX_HEIGHT);

  359.     }

  360. 

  361.     flag(vui_parameters_present_flag);

  362.     if (current->vui_parameters_present_flag)

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

  364.     else

  365.         CHECK(FUNC(vui_parameters_default)(ctx, rw, &current->vui, current));

  366. 

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

  368. 

  369.     return 0;

  370. }

  371. 

  372. static int FUNC(sps_extension)(CodedBitstreamContext *ctx, RWContext *rw,

  373.                                H264RawSPSExtension *current)

  374. {

  375.     int err;

  376. 

  377.     HEADER("Sequence Parameter Set Extension");

  378. 

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

  380.                                 1 << H264_NAL_SPS_EXT));

  381. 

  382.     ue(seq_parameter_set_id, 0, 31);

  383. 

  384.     ue(aux_format_idc, 0, 3);

  385. 

  386.     if (current->aux_format_idc != 0) {

  387.         int bits;

  388. 

  389.         ue(bit_depth_aux_minus8, 0, 4);

  390.         flag(alpha_incr_flag);

  391. 

  392.         bits = current->bit_depth_aux_minus8 + 9;

  393.         ub(bits, alpha_opaque_value);

  394.         ub(bits, alpha_transparent_value);

  395.     }

  396. 

  397.     flag(additional_extension_flag);

  398. 

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

  400. 

  401.     return 0;

  402. }

  403. 

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

  405.                      H264RawPPS *current)

  406. {

  407.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  408.     const H264RawSPS *sps;

  409.     int err, i;

  410. 

  411.     HEADER("Picture Parameter Set");

  412. 

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

  414.                                 1 << H264_NAL_PPS));

  415. 

  416.     ue(pic_parameter_set_id, 0, 255);

  417.     ue(seq_parameter_set_id, 0, 31);

  418. 

  419.     sps = h264->sps[current->seq_parameter_set_id];

  420.     if (!sps) {

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

  422.                current->seq_parameter_set_id);

  423.         return AVERROR_INVALIDDATA;

  424.     }

  425. 

  426.     flag(entropy_coding_mode_flag);

  427.     flag(bottom_field_pic_order_in_frame_present_flag);

  428. 

  429.     ue(num_slice_groups_minus1, 0, 7);

  430.     if (current->num_slice_groups_minus1 > 0) {

  431.         unsigned int pic_size;

  432.         int iGroup;

  433. 

  434.         pic_size = (sps->pic_width_in_mbs_minus1 + 1) *

  435.                    (sps->pic_height_in_map_units_minus1 + 1);

  436. 

  437.         ue(slice_group_map_type, 0, 6);

  438. 

  439.         if (current->slice_group_map_type == 0) {

  440.             for (iGroup = 0; iGroup <= current->num_slice_groups_minus1; iGroup++)

  441.                 ues(run_length_minus1[iGroup], 0, pic_size - 1, 1, iGroup);

  442. 

  443.         } else if (current->slice_group_map_type == 2) {

  444.             for (iGroup = 0; iGroup < current->num_slice_groups_minus1; iGroup++) {

  445.                 ues(top_left[iGroup],       0, pic_size - 1, 1, iGroup);

  446.                 ues(bottom_right[iGroup],

  447.                     current->top_left[iGroup], pic_size - 1, 1, iGroup);

  448.             }

  449.         } else if (current->slice_group_map_type == 3 ||

  450.                    current->slice_group_map_type == 4 ||

  451.                    current->slice_group_map_type == 5) {

  452.             flag(slice_group_change_direction_flag);

  453.             ue(slice_group_change_rate_minus1, 0, pic_size - 1);

  454.         } else if (current->slice_group_map_type == 6) {

  455.             ue(pic_size_in_map_units_minus1, pic_size - 1, pic_size - 1);

  456. 

  457.             allocate(current->slice_group_id,

  458.                      current->pic_size_in_map_units_minus1 + 1);

  459.             for (i = 0; i <= current->pic_size_in_map_units_minus1; i++)

  460.                 us(av_log2(2 * current->num_slice_groups_minus1 + 1),

  461.                    slice_group_id[i], 0, current->num_slice_groups_minus1, 1, i);

  462.         }

  463.     }

  464. 

  465.     ue(num_ref_idx_l0_default_active_minus1, 0, 31);

  466.     ue(num_ref_idx_l1_default_active_minus1, 0, 31);

  467. 

  468.     flag(weighted_pred_flag);

  469.     u(2, weighted_bipred_idc, 0, 2);

  470. 

  471.     se(pic_init_qp_minus26, -26 - 6 * sps->bit_depth_luma_minus8, +25);

  472.     se(pic_init_qs_minus26, -26, +25);

  473.     se(chroma_qp_index_offset, -12, +12);

  474. 

  475.     flag(deblocking_filter_control_present_flag);

  476.     flag(constrained_intra_pred_flag);

  477.     flag(redundant_pic_cnt_present_flag);

  478. 

  479.     if (more_rbsp_data(current->more_rbsp_data))

  480.     {

  481.         flag(transform_8x8_mode_flag);

  482. 

  483.         flag(pic_scaling_matrix_present_flag);

  484.         if (current->pic_scaling_matrix_present_flag) {

  485.             for (i = 0; i < 6 + (((sps->chroma_format_idc != 3) ? 2 : 6) *

  486.                                  current->transform_8x8_mode_flag); i++) {

  487.                 flags(pic_scaling_list_present_flag[i], 1, i);

  488.                 if (current->pic_scaling_list_present_flag[i]) {

  489.                     if (i < 6)

  490.                         CHECK(FUNC(scaling_list)(ctx, rw,

  491.                                                  &current->scaling_list_4x4[i],

  492.                                                  16));

  493.                     else

  494.                         CHECK(FUNC(scaling_list)(ctx, rw,

  495.                                                  &current->scaling_list_8x8[i - 6],

  496.                                                  64));

  497.                 }

  498.             }

  499.         }

  500. 

  501.         se(second_chroma_qp_index_offset, -12, +12);

  502.     } else {

  503.         infer(transform_8x8_mode_flag, 0);

  504.         infer(pic_scaling_matrix_present_flag, 0);

  505.         infer(second_chroma_qp_index_offset, current->chroma_qp_index_offset);

  506.     }

  507. 

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

  509. 

  510.     return 0;

  511. }

  512. 

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

  514.                                       H264RawSEIBufferingPeriod *current)

  515. {

  516.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  517.     const H264RawSPS *sps;

  518.     int err, i, length;

  519. 

  520.     HEADER("Buffering Period");

  521. 

  522.     ue(seq_parameter_set_id, 0, 31);

  523. 

  524.     sps = h264->sps[current->seq_parameter_set_id];

  525.     if (!sps) {

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

  527.                current->seq_parameter_set_id);

  528.         return AVERROR_INVALIDDATA;

  529.     }

  530.     h264->active_sps = sps;

  531. 

  532.     if (sps->vui.nal_hrd_parameters_present_flag) {

  533.         for (i = 0; i <= sps->vui.nal_hrd_parameters.cpb_cnt_minus1; i++) {

  534.             length = sps->vui.nal_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;

  535.             xu(length, initial_cpb_removal_delay[SchedSelIdx],

  536.                current->nal.initial_cpb_removal_delay[i],

  537.                1, MAX_UINT_BITS(length), 1, i);

  538.             xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],

  539.                current->nal.initial_cpb_removal_delay_offset[i],

  540.                0, MAX_UINT_BITS(length), 1, i);

  541.         }

  542.     }

  543. 

  544.     if (sps->vui.vcl_hrd_parameters_present_flag) {

  545.         for (i = 0; i <= sps->vui.vcl_hrd_parameters.cpb_cnt_minus1; i++) {

  546.             length = sps->vui.vcl_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;

  547.             xu(length, initial_cpb_removal_delay[SchedSelIdx],

  548.                current->vcl.initial_cpb_removal_delay[i],

  549.                1, MAX_UINT_BITS(length), 1, i);

  550.             xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],

  551.                current->vcl.initial_cpb_removal_delay_offset[i],

  552.                0, MAX_UINT_BITS(length), 1, i);

  553.         }

  554.     }

  555. 

  556.     return 0;

  557. }

  558. 

  559. static int FUNC(sei_pic_timestamp)(CodedBitstreamContext *ctx, RWContext *rw,

  560.                                    H264RawSEIPicTimestamp *current,

  561.                                    const H264RawSPS *sps)

  562. {

  563.     uint8_t time_offset_length;

  564.     int err;

  565. 

  566.     u(2, ct_type, 0, 2);

  567.     flag(nuit_field_based_flag);

  568.     u(5, counting_type, 0, 6);

  569.     flag(full_timestamp_flag);

  570.     flag(discontinuity_flag);

  571.     flag(cnt_dropped_flag);

  572.     ub(8, n_frames);

  573.     if (current->full_timestamp_flag) {

  574.             u(6, seconds_value, 0, 59);

  575.             u(6, minutes_value, 0, 59);

  576.             u(5, hours_value,   0, 23);

  577.     } else {

  578.         flag(seconds_flag);

  579.         if (current->seconds_flag) {

  580.             u(6, seconds_value, 0, 59);

  581.             flag(minutes_flag);

  582.             if (current->minutes_flag) {

  583.                 u(6, minutes_value, 0, 59);

  584.                 flag(hours_flag);

  585.                 if (current->hours_flag)

  586.                     u(5, hours_value, 0, 23);

  587.             }

  588.         }

  589.     }

  590. 

  591.     if (sps->vui.nal_hrd_parameters_present_flag)

  592.         time_offset_length = sps->vui.nal_hrd_parameters.time_offset_length;

  593.     else if (sps->vui.vcl_hrd_parameters_present_flag)

  594.         time_offset_length = sps->vui.vcl_hrd_parameters.time_offset_length;

  595.     else

  596.         time_offset_length = 24;

  597. 

  598.     if (time_offset_length > 0)

  599.         ib(time_offset_length, time_offset);

  600.     else

  601.         infer(time_offset, 0);

  602. 

  603.     return 0;

  604. }

  605. 

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

  607.                                 H264RawSEIPicTiming *current)

  608. {

  609.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  610.     const H264RawSPS *sps;

  611.     int err;

  612. 

  613.     HEADER("Picture Timing");

  614. 

  615.     sps = h264->active_sps;

  616.     if (!sps) {

  617.         // If there is exactly one possible SPS but it is not yet active

  618.         // then just assume that it should be the active one.

  619.         int i, k = -1;

  620.         for (i = 0; i < H264_MAX_SPS_COUNT; i++) {

  621.             if (h264->sps[i]) {

  622.                 if (k >= 0) {

  623.                     k = -1;

  624.                     break;

  625.                 }

  626.                 k = i;

  627.             }

  628.         }

  629.         if (k >= 0)

  630.             sps = h264->sps[k];

  631.     }

  632.     if (!sps) {

  633.         av_log(ctx->log_ctx, AV_LOG_ERROR,

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

  635.         return AVERROR_INVALIDDATA;

  636.     }

  637. 

  638.     if (sps->vui.nal_hrd_parameters_present_flag ||

  639.         sps->vui.vcl_hrd_parameters_present_flag) {

  640.         const H264RawHRD *hrd;

  641. 

  642.         if (sps->vui.nal_hrd_parameters_present_flag)

  643.             hrd = &sps->vui.nal_hrd_parameters;

  644.         else if (sps->vui.vcl_hrd_parameters_present_flag)

  645.             hrd = &sps->vui.vcl_hrd_parameters;

  646.         else {

  647.             av_log(ctx->log_ctx, AV_LOG_ERROR,

  648.                    "No HRD parameters for pic_timing.\n");

  649.             return AVERROR_INVALIDDATA;

  650.         }

  651. 

  652.         ub(hrd->cpb_removal_delay_length_minus1 + 1, cpb_removal_delay);

  653.         ub(hrd->dpb_output_delay_length_minus1 + 1, dpb_output_delay);

  654.     }

  655. 

  656.     if (sps->vui.pic_struct_present_flag) {

  657.         static const uint8_t num_clock_ts[9] = {

  658.             1, 1, 1, 2, 2, 3, 3, 2, 3

  659.         };

  660.         int i;

  661. 

  662.         u(4, pic_struct, 0, 8);

  663.         if (current->pic_struct > 8)

  664.             return AVERROR_INVALIDDATA;

  665. 

  666.         for (i = 0; i < num_clock_ts[current->pic_struct]; i++) {

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

  668.             if (current->clock_timestamp_flag[i])

  669.                 CHECK(FUNC(sei_pic_timestamp)(ctx, rw,

  670.                                               &current->timestamp[i], sps));

  671.         }

  672.     }

  673. 

  674.     return 0;

  675. }

  676. 

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

  678.                                    H264RawSEIPanScanRect *current)

  679. {

  680.     int err, i;

  681. 

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

  683. 

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

  685.     flag(pan_scan_rect_cancel_flag);

  686. 

  687.     if (!current->pan_scan_rect_cancel_flag) {

  688.         ue(pan_scan_cnt_minus1, 0, 2);

  689. 

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

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

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

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

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

  695.         }

  696. 

  697.         ue(pan_scan_rect_repetition_period, 0, 16384);

  698.     }

  699. 

  700.     return 0;

  701. }

  702. 

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

  704.                                           H264RawSEIUserDataRegistered *current,

  705.                                           uint32_t *payload_size)

  706. {

  707.     int err, i, j;

  708. 

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

  710. 

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

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

  713.         i = 1;

  714.     else {

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

  716.         i = 2;

  717.     }

  718. 

  719. #ifdef READ

  720.     if (*payload_size < i) {

  721.         av_log(ctx->log_ctx, AV_LOG_ERROR,

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

  723.         return AVERROR_INVALIDDATA;

  724.     }

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

  726. #else

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

  728. #endif

  729. 

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

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

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

  733. 

  734.     return 0;

  735. }

  736. 

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

  738.                                             H264RawSEIUserDataUnregistered *current,

  739.                                             uint32_t *payload_size)

  740. {

  741.     int err, i;

  742. 

  743.     HEADER("User Data Unregistered");

  744. 

  745. #ifdef READ

  746.     if (*payload_size < 16) {

  747.         av_log(ctx->log_ctx, AV_LOG_ERROR,

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

  749.         return AVERROR_INVALIDDATA;

  750.     }

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

  752. #else

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

  754. #endif

  755. 

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

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

  758. 

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

  760. 

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

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

  763. 

  764.     return 0;

  765. }

  766. 

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

  768.                                     H264RawSEIRecoveryPoint *current)

  769. {

  770.     int err;

  771. 

  772.     HEADER("Recovery Point");

  773. 

  774.     ue(recovery_frame_cnt, 0, 65535);

  775.     flag(exact_match_flag);

  776.     flag(broken_link_flag);

  777.     u(2, changing_slice_group_idc, 0, 2);

  778. 

  779.     return 0;

  780. }

  781. 

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

  783.                                          H264RawSEIDisplayOrientation *current)

  784. {

  785.     int err;

  786. 

  787.     HEADER("Display Orientation");

  788. 

  789.     flag(display_orientation_cancel_flag);

  790.     if (!current->display_orientation_cancel_flag) {

  791.         flag(hor_flip);

  792.         flag(ver_flip);

  793.         ub(16, anticlockwise_rotation);

  794.         ue(display_orientation_repetition_period, 0, 16384);

  795.         flag(display_orientation_extension_flag);

  796.     }

  797. 

  798.     return 0;

  799. }

  800. 

  801. static int FUNC(sei_mastering_display_colour_volume)(CodedBitstreamContext *ctx, RWContext *rw,

  802.                                                      H264RawSEIMasteringDisplayColourVolume *current)

  803. {

  804.     int err, c;

  805. 

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

  807. 

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

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

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

  811.     }

  812. 

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

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

  815. 

  816.     u(32, max_display_mastering_luminance, 1, MAX_UINT_BITS(32));

  817.     u(32, min_display_mastering_luminance, 0, current->max_display_mastering_luminance - 1);

  818. 

  819.     return 0;

  820. }

  821. 

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

  823.                                                           RWContext *rw,

  824.                                                           H264RawSEIAlternativeTransferCharacteristics *current)

  825. {

  826.     int err;

  827. 

  828.     HEADER("Alternative Transfer Characteristics");

  829. 

  830.     ub(8, preferred_transfer_characteristics);

  831. 

  832.     return 0;

  833. }

  834. 

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

  836.                              H264RawSEIPayload *current)

  837. {

  838.     int err, i;

  839.     int start_position, end_position;

  840. 

  841. #ifdef READ

  842.     start_position = get_bits_count(rw);

  843. #else

  844.     start_position = put_bits_count(rw);

  845. #endif

  846. 

  847.     switch (current->payload_type) {

  848.     case H264_SEI_TYPE_BUFFERING_PERIOD:

  849.         CHECK(FUNC(sei_buffering_period)

  850.               (ctx, rw, &current->payload.buffering_period));

  851.         break;

  852.     case H264_SEI_TYPE_PIC_TIMING:

  853.         CHECK(FUNC(sei_pic_timing)

  854.               (ctx, rw, &current->payload.pic_timing));

  855.         break;

  856.     case H264_SEI_TYPE_PAN_SCAN_RECT:

  857.         CHECK(FUNC(sei_pan_scan_rect)

  858.               (ctx, rw, &current->payload.pan_scan_rect));

  859.         break;

  860.     case H264_SEI_TYPE_FILLER_PAYLOAD:

  861.         {

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

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

  864.         }

  865.         break;

  866.     case H264_SEI_TYPE_USER_DATA_REGISTERED:

  867.         CHECK(FUNC(sei_user_data_registered)

  868.               (ctx, rw, &current->payload.user_data_registered, &current->payload_size));

  869.         break;

  870.     case H264_SEI_TYPE_USER_DATA_UNREGISTERED:

  871.         CHECK(FUNC(sei_user_data_unregistered)

  872.               (ctx, rw, &current->payload.user_data_unregistered, &current->payload_size));

  873.         break;

  874.     case H264_SEI_TYPE_RECOVERY_POINT:

  875.         CHECK(FUNC(sei_recovery_point)

  876.               (ctx, rw, &current->payload.recovery_point));

  877.         break;

  878.     case H264_SEI_TYPE_DISPLAY_ORIENTATION:

  879.         CHECK(FUNC(sei_display_orientation)

  880.               (ctx, rw, &current->payload.display_orientation));

  881.         break;

  882.     case H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME:

  883.         CHECK(FUNC(sei_mastering_display_colour_volume)

  884.               (ctx, rw, &current->payload.mastering_display_colour_volume));

  885.         break;

  886.     case H264_SEI_TYPE_ALTERNATIVE_TRANSFER:

  887.         CHECK(FUNC(sei_alternative_transfer_characteristics)

  888.               (ctx, rw, &current->payload.alternative_transfer_characteristics));

  889.         break;

  890.     default:

  891.         {

  892. #ifdef READ

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

  894. #endif

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

  896.             for (i = 0; i < current->payload.other.data_length; i++)

  897.                 xu(8, payload_byte[i], current->payload.other.data[i], 0, 255, 1, i);

  898.         }

  899.     }

  900. 

  901.     if (byte_alignment(rw)) {

  902.         fixed(1, bit_equal_to_one, 1);

  903.         while (byte_alignment(rw))

  904.             fixed(1, bit_equal_to_zero, 0);

  905.     }

  906. 

  907. #ifdef READ

  908.     end_position = get_bits_count(rw);

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

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

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

  912.                8 * current->payload_size,

  913.                end_position - start_position);

  914.         return AVERROR_INVALIDDATA;

  915.     }

  916. #else

  917.     end_position = put_bits_count(rw);

  918.     current->payload_size = (end_position - start_position) / 8;

  919. #endif

  920. 

  921.     return 0;

  922. }

  923. 

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

  925.                      H264RawSEI *current)

  926. {

  927.     int err, k;

  928. 

  929.     HEADER("Supplemental Enhancement Information");

  930. 

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

  932.                                 1 << H264_NAL_SEI));

  933. 

  934. #ifdef READ

  935.     for (k = 0; k < H264_MAX_SEI_PAYLOADS; k++) {

  936.         uint32_t payload_type = 0;

  937.         uint32_t payload_size = 0;

  938.         uint32_t tmp;

  939. 

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

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

  942.             payload_type += 255;

  943.         }

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

  945.         payload_type += tmp;

  946. 

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

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

  949.             payload_size += 255;

  950.         }

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

  952.         payload_size += tmp;

  953. 

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

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

  956. 

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

  958. 

  959.         if (!cbs_h2645_read_more_rbsp_data(rw))

  960.             break;

  961.     }

  962.     if (k >= H264_MAX_SEI_PAYLOADS) {

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

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

  965.         return AVERROR_INVALIDDATA;

  966.     }

  967.     current->payload_count = k + 1;

  968. #else

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

  970.         PutBitContext start_state;

  971.         uint32_t tmp;

  972.         int need_size, i;

  973. 

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

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

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

  977.         start_state = *rw;

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

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

  980.             *rw = start_state;

  981. 

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

  983.             while (tmp >= 255) {

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

  985.                 tmp -= 255;

  986.             }

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

  988. 

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

  990.             while (tmp >= 255) {

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

  992.                 tmp -= 255;

  993.             }

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

  995. 

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

  997.         }

  998.     }

  999. #endif

  1000. 

  1001.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  1002. 

  1003.     return 0;

  1004. }

  1005. 

  1006. static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,

  1007.                      H264RawAUD *current)

  1008. {

  1009.     int err;

  1010. 

  1011.     HEADER("Access Unit Delimiter");

  1012. 

  1013.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,

  1014.                                 1 << H264_NAL_AUD));

  1015. 

  1016.     ub(3, primary_pic_type);

  1017. 

  1018.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  1019. 

  1020.     return 0;

  1021. }

  1022. 

  1023. static int FUNC(ref_pic_list_modification)(CodedBitstreamContext *ctx, RWContext *rw,

  1024.                                            H264RawSliceHeader *current)

  1025. {

  1026.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  1027.     const H264RawSPS *sps = h264->active_sps;

  1028.     int err, i, mopn;

  1029. 

  1030.     if (current->slice_type % 5 != 2 &&

  1031.         current->slice_type % 5 != 4) {

  1032.         flag(ref_pic_list_modification_flag_l0);

  1033.         if (current->ref_pic_list_modification_flag_l0) {

  1034.             for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {

  1035.                 xue(modification_of_pic_nums_idc,

  1036.                     current->rplm_l0[i].modification_of_pic_nums_idc, 0, 3, 0);

  1037. 

  1038.                 mopn = current->rplm_l0[i].modification_of_pic_nums_idc;

  1039.                 if (mopn == 3)

  1040.                     break;

  1041. 

  1042.                 if (mopn == 0 || mopn == 1)

  1043.                     xue(abs_diff_pic_num_minus1,

  1044.                         current->rplm_l0[i].abs_diff_pic_num_minus1,

  1045.                         0, (1 + current->field_pic_flag) *

  1046.                         (1 << (sps->log2_max_frame_num_minus4 + 4)), 0);

  1047.                 else if (mopn == 2)

  1048.                     xue(long_term_pic_num,

  1049.                         current->rplm_l0[i].long_term_pic_num,

  1050.                         0, sps->max_num_ref_frames - 1, 0);

  1051.             }

  1052.         }

  1053.     }

  1054. 

  1055.     if (current->slice_type % 5 == 1) {

  1056.         flag(ref_pic_list_modification_flag_l1);

  1057.         if (current->ref_pic_list_modification_flag_l1) {

  1058.             for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {

  1059.                 xue(modification_of_pic_nums_idc,

  1060.                     current->rplm_l1[i].modification_of_pic_nums_idc, 0, 3, 0);

  1061. 

  1062.                 mopn = current->rplm_l1[i].modification_of_pic_nums_idc;

  1063.                 if (mopn == 3)

  1064.                     break;

  1065. 

  1066.                 if (mopn == 0 || mopn == 1)

  1067.                     xue(abs_diff_pic_num_minus1,

  1068.                         current->rplm_l1[i].abs_diff_pic_num_minus1,

  1069.                         0, (1 + current->field_pic_flag) *

  1070.                         (1 << (sps->log2_max_frame_num_minus4 + 4)), 0);

  1071.                 else if (mopn == 2)

  1072.                     xue(long_term_pic_num,

  1073.                         current->rplm_l1[i].long_term_pic_num,

  1074.                         0, sps->max_num_ref_frames - 1, 0);

  1075.             }

  1076.         }

  1077.     }

  1078. 

  1079.     return 0;

  1080. }

  1081. 

  1082. static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,

  1083.                                    H264RawSliceHeader *current)

  1084. {

  1085.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  1086.     const H264RawSPS *sps = h264->active_sps;

  1087.     int chroma;

  1088.     int err, i, j;

  1089. 

  1090.     ue(luma_log2_weight_denom, 0, 7);

  1091. 

  1092.     chroma = !sps->separate_colour_plane_flag && sps->chroma_format_idc != 0;

  1093.     if (chroma)

  1094.         ue(chroma_log2_weight_denom, 0, 7);

  1095. 

  1096.     for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {

  1097.         flags(luma_weight_l0_flag[i], 1, i);

  1098.         if (current->luma_weight_l0_flag[i]) {

  1099.             ses(luma_weight_l0[i], -128, +127, 1, i);

  1100.             ses(luma_offset_l0[i], -128, +127, 1, i);

  1101.         }

  1102.         if (chroma) {

  1103.             flags(chroma_weight_l0_flag[i], 1, i);

  1104.             if (current->chroma_weight_l0_flag[i]) {

  1105.                 for (j = 0; j < 2; j++) {

  1106.                     ses(chroma_weight_l0[i][j], -128, +127, 2, i, j);

  1107.                     ses(chroma_offset_l0[i][j], -128, +127, 2, i, j);

  1108.                 }

  1109.             }

  1110.         }

  1111.     }

  1112. 

  1113.     if (current->slice_type % 5 == 1) {

  1114.         for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {

  1115.             flags(luma_weight_l1_flag[i], 1, i);

  1116.             if (current->luma_weight_l1_flag[i]) {

  1117.                 ses(luma_weight_l1[i], -128, +127, 1, i);

  1118.                 ses(luma_offset_l1[i], -128, +127, 1, i);

  1119.             }

  1120.             if (chroma) {

  1121.                 flags(chroma_weight_l1_flag[i], 1, i);

  1122.                 if (current->chroma_weight_l1_flag[i]) {

  1123.                     for (j = 0; j < 2; j++) {

  1124.                         ses(chroma_weight_l1[i][j], -128, +127, 2, i, j);

  1125.                         ses(chroma_offset_l1[i][j], -128, +127, 2, i, j);

  1126.                     }

  1127.                 }

  1128.             }

  1129.         }

  1130.     }

  1131. 

  1132.     return 0;

  1133. }

  1134. 

  1135. static int FUNC(dec_ref_pic_marking)(CodedBitstreamContext *ctx, RWContext *rw,

  1136.                                      H264RawSliceHeader *current, int idr_pic_flag)

  1137. {

  1138.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  1139.     const H264RawSPS *sps = h264->active_sps;

  1140.     int err, i;

  1141.     uint32_t mmco;

  1142. 

  1143.     if (idr_pic_flag) {

  1144.         flag(no_output_of_prior_pics_flag);

  1145.         flag(long_term_reference_flag);

  1146.     } else {

  1147.         flag(adaptive_ref_pic_marking_mode_flag);

  1148.         if (current->adaptive_ref_pic_marking_mode_flag) {

  1149.             for (i = 0; i < H264_MAX_MMCO_COUNT; i++) {

  1150.                 xue(memory_management_control_operation,

  1151.                     current->mmco[i].memory_management_control_operation,

  1152.                     0, 6, 0);

  1153. 

  1154.                 mmco = current->mmco[i].memory_management_control_operation;

  1155.                 if (mmco == 0)

  1156.                     break;

  1157. 

  1158.                 if (mmco == 1 || mmco == 3)

  1159.                     xue(difference_of_pic_nums_minus1,

  1160.                         current->mmco[i].difference_of_pic_nums_minus1,

  1161.                         0, INT32_MAX, 0);

  1162.                 if (mmco == 2)

  1163.                     xue(long_term_pic_num,

  1164.                         current->mmco[i].long_term_pic_num,

  1165.                         0, sps->max_num_ref_frames - 1, 0);

  1166.                 if (mmco == 3 || mmco == 6)

  1167.                     xue(long_term_frame_idx,

  1168.                         current->mmco[i].long_term_frame_idx,

  1169.                         0, sps->max_num_ref_frames - 1, 0);

  1170.                 if (mmco == 4)

  1171.                     xue(max_long_term_frame_idx_plus1,

  1172.                         current->mmco[i].max_long_term_frame_idx_plus1,

  1173.                         0, sps->max_num_ref_frames, 0);

  1174.             }

  1175.             if (i == H264_MAX_MMCO_COUNT) {

  1176.                 av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many "

  1177.                        "memory management control operations.\n");

  1178.                 return AVERROR_INVALIDDATA;

  1179.             }

  1180.         }

  1181.     }

  1182. 

  1183.     return 0;

  1184. }

  1185. 

  1186. static int FUNC(slice_header)(CodedBitstreamContext *ctx, RWContext *rw,

  1187.                               H264RawSliceHeader *current)

  1188. {

  1189.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  1190.     const H264RawSPS *sps;

  1191.     const H264RawPPS *pps;

  1192.     int err;

  1193.     int idr_pic_flag;

  1194.     int slice_type_i, slice_type_p, slice_type_b;

  1195.     int slice_type_si, slice_type_sp;

  1196. 

  1197.     HEADER("Slice Header");

  1198. 

  1199.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,

  1200.                                 1 << H264_NAL_SLICE     |

  1201.                                 1 << H264_NAL_IDR_SLICE |

  1202.                                 1 << H264_NAL_AUXILIARY_SLICE));

  1203. 

  1204.     if (current->nal_unit_header.nal_unit_type == H264_NAL_AUXILIARY_SLICE) {

  1205.         if (!h264->last_slice_nal_unit_type) {

  1206.             av_log(ctx->log_ctx, AV_LOG_ERROR, "Auxiliary slice "

  1207.                    "is not decodable without the main picture "

  1208.                    "in the same access unit.\n");

  1209.             return AVERROR_INVALIDDATA;

  1210.         }

  1211.         idr_pic_flag = h264->last_slice_nal_unit_type == H264_NAL_IDR_SLICE;

  1212.     } else {

  1213.         idr_pic_flag = current->nal_unit_header.nal_unit_type == H264_NAL_IDR_SLICE;

  1214.     }

  1215. 

  1216.     ue(first_mb_in_slice, 0, H264_MAX_MB_PIC_SIZE - 1);

  1217.     ue(slice_type, 0, 9);

  1218. 

  1219.     slice_type_i  = current->slice_type % 5 == 2;

  1220.     slice_type_p  = current->slice_type % 5 == 0;

  1221.     slice_type_b  = current->slice_type % 5 == 1;

  1222.     slice_type_si = current->slice_type % 5 == 4;

  1223.     slice_type_sp = current->slice_type % 5 == 3;

  1224. 

  1225.     if (idr_pic_flag && !(slice_type_i || slice_type_si)) {

  1226.         av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid slice type %d "

  1227.                "for IDR picture.\n", current->slice_type);

  1228.         return AVERROR_INVALIDDATA;

  1229.     }

  1230. 

  1231.     ue(pic_parameter_set_id, 0, 255);

  1232. 

  1233.     pps = h264->pps[current->pic_parameter_set_id];

  1234.     if (!pps) {

  1235.         av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",

  1236.                current->pic_parameter_set_id);

  1237.         return AVERROR_INVALIDDATA;

  1238.     }

  1239.     h264->active_pps = pps;

  1240. 

  1241.     sps = h264->sps[pps->seq_parameter_set_id];

  1242.     if (!sps) {

  1243.         av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",

  1244.                pps->seq_parameter_set_id);

  1245.         return AVERROR_INVALIDDATA;

  1246.     }

  1247.     h264->active_sps = sps;

  1248. 

  1249.     if (sps->separate_colour_plane_flag)

  1250.         u(2, colour_plane_id, 0, 2);

  1251. 

  1252.     ub(sps->log2_max_frame_num_minus4 + 4, frame_num);

  1253. 

  1254.     if (!sps->frame_mbs_only_flag) {

  1255.         flag(field_pic_flag);

  1256.         if (current->field_pic_flag)

  1257.             flag(bottom_field_flag);

  1258.         else

  1259.             infer(bottom_field_flag, 0);

  1260.     } else {

  1261.         infer(field_pic_flag,    0);

  1262.         infer(bottom_field_flag, 0);

  1263.     }

  1264. 

  1265.     if (idr_pic_flag)

  1266.         ue(idr_pic_id, 0, 65535);

  1267. 

  1268.     if (sps->pic_order_cnt_type == 0) {

  1269.         ub(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, pic_order_cnt_lsb);

  1270.         if (pps->bottom_field_pic_order_in_frame_present_flag &&

  1271.             !current->field_pic_flag)

  1272.             se(delta_pic_order_cnt_bottom, INT32_MIN + 1, INT32_MAX);

  1273. 

  1274.     } else if (sps->pic_order_cnt_type == 1) {

  1275.         if (!sps->delta_pic_order_always_zero_flag) {

  1276.             se(delta_pic_order_cnt[0], INT32_MIN + 1, INT32_MAX);

  1277.             if (pps->bottom_field_pic_order_in_frame_present_flag &&

  1278.                 !current->field_pic_flag)

  1279.                 se(delta_pic_order_cnt[1], INT32_MIN + 1, INT32_MAX);

  1280.             else

  1281.                 infer(delta_pic_order_cnt[1], 0);

  1282.         } else {

  1283.             infer(delta_pic_order_cnt[0], 0);

  1284.             infer(delta_pic_order_cnt[1], 0);

  1285.         }

  1286.     }

  1287. 

  1288.     if (pps->redundant_pic_cnt_present_flag)

  1289.         ue(redundant_pic_cnt, 0, 127);

  1290.     else

  1291.         infer(redundant_pic_cnt, 0);

  1292. 

  1293.     if (current->nal_unit_header.nal_unit_type != H264_NAL_AUXILIARY_SLICE

  1294.         && !current->redundant_pic_cnt)

  1295.         h264->last_slice_nal_unit_type =

  1296.             current->nal_unit_header.nal_unit_type;

  1297. 

  1298.     if (slice_type_b)

  1299.         flag(direct_spatial_mv_pred_flag);

  1300. 

  1301.     if (slice_type_p || slice_type_sp || slice_type_b) {

  1302.         flag(num_ref_idx_active_override_flag);

  1303.         if (current->num_ref_idx_active_override_flag) {

  1304.             ue(num_ref_idx_l0_active_minus1, 0, 31);

  1305.             if (slice_type_b)

  1306.                 ue(num_ref_idx_l1_active_minus1, 0, 31);

  1307.         } else {

  1308.             infer(num_ref_idx_l0_active_minus1,

  1309.                   pps->num_ref_idx_l0_default_active_minus1);

  1310.             infer(num_ref_idx_l1_active_minus1,

  1311.                   pps->num_ref_idx_l1_default_active_minus1);

  1312.         }

  1313.     }

  1314. 

  1315.     if (current->nal_unit_header.nal_unit_type == 20 ||

  1316.         current->nal_unit_header.nal_unit_type == 21) {

  1317.         av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC / 3DAVC not supported.\n");

  1318.         return AVERROR_PATCHWELCOME;

  1319.     } else {

  1320.         CHECK(FUNC(ref_pic_list_modification)(ctx, rw, current));

  1321.     }

  1322. 

  1323.     if ((pps->weighted_pred_flag && (slice_type_p || slice_type_sp)) ||

  1324.         (pps->weighted_bipred_idc == 1 && slice_type_b)) {

  1325.         CHECK(FUNC(pred_weight_table)(ctx, rw, current));

  1326.     }

  1327. 

  1328.     if (current->nal_unit_header.nal_ref_idc != 0) {

  1329.         CHECK(FUNC(dec_ref_pic_marking)(ctx, rw, current, idr_pic_flag));

  1330.     }

  1331. 

  1332.     if (pps->entropy_coding_mode_flag &&

  1333.         !slice_type_i && !slice_type_si) {

  1334.         ue(cabac_init_idc, 0, 2);

  1335.     }

  1336. 

  1337.     se(slice_qp_delta, - 51 - 6 * sps->bit_depth_luma_minus8,

  1338.                        + 51 + 6 * sps->bit_depth_luma_minus8);

  1339.     if (slice_type_sp || slice_type_si) {

  1340.         if (slice_type_sp)

  1341.             flag(sp_for_switch_flag);

  1342.         se(slice_qs_delta, -51, +51);

  1343.     }

  1344. 

  1345.     if (pps->deblocking_filter_control_present_flag) {

  1346.         ue(disable_deblocking_filter_idc, 0, 2);

  1347.         if (current->disable_deblocking_filter_idc != 1) {

  1348.             se(slice_alpha_c0_offset_div2, -6, +6);

  1349.             se(slice_beta_offset_div2,     -6, +6);

  1350.         } else {

  1351.             infer(slice_alpha_c0_offset_div2, 0);

  1352.             infer(slice_beta_offset_div2,     0);

  1353.         }

  1354.     } else {

  1355.         infer(disable_deblocking_filter_idc, 0);

  1356.         infer(slice_alpha_c0_offset_div2,    0);

  1357.         infer(slice_beta_offset_div2,        0);

  1358.     }

  1359. 

  1360.     if (pps->num_slice_groups_minus1 > 0 &&

  1361.         pps->slice_group_map_type >= 3 &&

  1362.         pps->slice_group_map_type <= 5) {

  1363.         unsigned int pic_size, max, bits;

  1364. 

  1365.         pic_size = (sps->pic_width_in_mbs_minus1 + 1) *

  1366.                    (sps->pic_height_in_map_units_minus1 + 1);

  1367.         max = (pic_size + pps->slice_group_change_rate_minus1) /

  1368.               (pps->slice_group_change_rate_minus1 + 1);

  1369.         bits = av_log2(2 * max - 1);

  1370. 

  1371.         u(bits, slice_group_change_cycle, 0, max);

  1372.     }

  1373. 

  1374.     if (pps->entropy_coding_mode_flag) {

  1375.         while (byte_alignment(rw))

  1376.             fixed(1, cabac_alignment_one_bit, 1);

  1377.     }

  1378. 

  1379.     return 0;

  1380. }

  1381. 

  1382. static int FUNC(filler)(CodedBitstreamContext *ctx, RWContext *rw,

  1383.                         H264RawFiller *current)

  1384. {

  1385.     int err;

  1386. 

  1387.     HEADER("Filler Data");

  1388. 

  1389.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,

  1390.                                 1 << H264_NAL_FILLER_DATA));

  1391. 

  1392. #ifdef READ

  1393.     while (show_bits(rw, 8) == 0xff) {

  1394.         fixed(8, ff_byte, 0xff);

  1395.         ++current->filler_size;

  1396.     }

  1397. #else

  1398.     {

  1399.         uint32_t i;

  1400.         for (i = 0; i < current->filler_size; i++)

  1401.             fixed(8, ff_byte, 0xff);

  1402.     }

  1403. #endif

  1404. 

  1405.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  1406. 

  1407.     return 0;

  1408. }

  1409. 

  1410. static int FUNC(end_of_sequence)(CodedBitstreamContext *ctx, RWContext *rw,

  1411.                                  H264RawNALUnitHeader *current)

  1412. {

  1413.     HEADER("End of Sequence");

  1414. 

  1415.     return FUNC(nal_unit_header)(ctx, rw, current,

  1416.                                  1 << H264_NAL_END_SEQUENCE);

  1417. }

  1418. 

  1419. static int FUNC(end_of_stream)(CodedBitstreamContext *ctx, RWContext *rw,

  1420.                                H264RawNALUnitHeader *current)

  1421. {

  1422.     HEADER("End of Stream");

  1423. 

  1424.     return FUNC(nal_unit_header)(ctx, rw, current,

  1425.                                  1 << H264_NAL_END_STREAM);

  1426. }