falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92025 Commits
32 Branches
303MB
Tree: 574dafe7b8
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '574dafe7b8'
${ noResults }
FFmpeg/libavcodec/cbs_h264_syntax_template.c

1330 lines
44KB
Raw Blame History 

  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.     u(1, forbidden_zero_bit, 0, 0);

  37.     u(2, nal_ref_idc,        0, 3);

  38.     u(5, nal_unit_type,      0, 31);

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

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

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

  104.     u(5, cpb_removal_delay_length_minus1,         0, 31);

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

  106.     u(5, time_offset_length,                      0, 31);

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

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

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

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

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

  134.         flag(video_full_range_flag);

  135.         flag(colour_description_present_flag);

  136.         if (current->colour_description_present_flag) {

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

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

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

  140.         }

  141.     } else {

  142.         infer(video_format,             5);

  143.         infer(video_full_range_flag,    0);

  144.         infer(colour_primaries,         2);

  145.         infer(transfer_characteristics, 2);

  146.         infer(matrix_coefficients,      2);

  147.     }

  148. 

  149.     flag(chroma_loc_info_present_flag);

  150.     if (current->chroma_loc_info_present_flag) {

  151.         ue(chroma_sample_loc_type_top_field,    0, 5);

  152.         ue(chroma_sample_loc_type_bottom_field, 0, 5);

  153.     } else {

  154.         infer(chroma_sample_loc_type_top_field,    0);

  155.         infer(chroma_sample_loc_type_bottom_field, 0);

  156.     }

  157. 

  158.     flag(timing_info_present_flag);

  159.     if (current->timing_info_present_flag) {

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

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

  162.         flag(fixed_frame_rate_flag);

  163.     } else {

  164.         infer(fixed_frame_rate_flag, 0);

  165.     }

  166. 

  167.     flag(nal_hrd_parameters_present_flag);

  168.     if (current->nal_hrd_parameters_present_flag)

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

  170. 

  171.     flag(vcl_hrd_parameters_present_flag);

  172.     if (current->vcl_hrd_parameters_present_flag)

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

  174. 

  175.     if (current->nal_hrd_parameters_present_flag ||

  176.         current->vcl_hrd_parameters_present_flag)

  177.         flag(low_delay_hrd_flag);

  178.     else

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

  180. 

  181.     flag(pic_struct_present_flag);

  182. 

  183.     flag(bitstream_restriction_flag);

  184.     if (current->bitstream_restriction_flag) {

  185.         flag(motion_vectors_over_pic_boundaries_flag);

  186.         ue(max_bytes_per_pic_denom, 0, 16);

  187.         ue(max_bits_per_mb_denom,   0, 16);

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

  189.         // [0,15], but older versions allow 16.

  190.         ue(log2_max_mv_length_horizontal, 0, 16);

  191.         ue(log2_max_mv_length_vertical,   0, 16);

  192.         ue(max_num_reorder_frames,  0, H264_MAX_DPB_FRAMES);

  193.         ue(max_dec_frame_buffering, 0, H264_MAX_DPB_FRAMES);

  194.     } else {

  195.         infer(motion_vectors_over_pic_boundaries_flag, 1);

  196.         infer(max_bytes_per_pic_denom, 2);

  197.         infer(max_bits_per_mb_denom,   1);

  198.         infer(log2_max_mv_length_horizontal, 15);

  199.         infer(log2_max_mv_length_vertical,   15);

  200. 

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

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

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

  204.             sps->constraint_set3_flag) {

  205.             infer(max_num_reorder_frames,  0);

  206.             infer(max_dec_frame_buffering, 0);

  207.         } else {

  208.             infer(max_num_reorder_frames,  H264_MAX_DPB_FRAMES);

  209.             infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES);

  210.         }

  211.     }

  212. 

  213.     return 0;

  214. }

  215. 

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

  217.                      H264RawSPS *current)

  218. {

  219.     int err, i;

  220. 

  221.     HEADER("Sequence Parameter Set");

  222. 

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

  224.                                 1 << H264_NAL_SPS));

  225. 

  226.     u(8, profile_idc, 0, 255);

  227. 

  228.     flag(constraint_set0_flag);

  229.     flag(constraint_set1_flag);

  230.     flag(constraint_set2_flag);

  231.     flag(constraint_set3_flag);

  232.     flag(constraint_set4_flag);

  233.     flag(constraint_set5_flag);

  234. 

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

  236. 

  237.     u(8, level_idc, 0, 255);

  238. 

  239.     ue(seq_parameter_set_id, 0, 31);

  240. 

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

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

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

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

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

  246.         ue(chroma_format_idc, 0, 3);

  247. 

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

  249.             flag(separate_colour_plane_flag);

  250.         else

  251.             infer(separate_colour_plane_flag, 0);

  252. 

  253.         ue(bit_depth_luma_minus8,   0, 6);

  254.         ue(bit_depth_chroma_minus8, 0, 6);

  255. 

  256.         flag(qpprime_y_zero_transform_bypass_flag);

  257. 

  258.         flag(seq_scaling_matrix_present_flag);

  259.         if (current->seq_scaling_matrix_present_flag) {

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

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

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

  263.                     if (i < 6)

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

  265.                                                  &current->scaling_list_4x4[i],

  266.                                                  16));

  267.                     else

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

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

  270.                                                  64));

  271.                 }

  272.             }

  273.         }

  274.     } else {

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

  276. 

  277.         infer(separate_colour_plane_flag, 0);

  278.         infer(bit_depth_luma_minus8,      0);

  279.         infer(bit_depth_chroma_minus8,    0);

  280.     }

  281. 

  282.     ue(log2_max_frame_num_minus4, 0, 12);

  283.     ue(pic_order_cnt_type, 0, 2);

  284. 

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

  286.         ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12);

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

  288.         flag(delta_pic_order_always_zero_flag);

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

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

  291.         ue(num_ref_frames_in_pic_order_cnt_cycle, 0, 255);

  292. 

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

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

  295.     }

  296. 

  297.     ue(max_num_ref_frames, 0, H264_MAX_DPB_FRAMES);

  298.     flag(gaps_in_frame_num_allowed_flag);

  299. 

  300.     ue(pic_width_in_mbs_minus1,        0, H264_MAX_MB_WIDTH);

  301.     ue(pic_height_in_map_units_minus1, 0, H264_MAX_MB_HEIGHT);

  302. 

  303.     flag(frame_mbs_only_flag);

  304.     if (!current->frame_mbs_only_flag)

  305.         flag(mb_adaptive_frame_field_flag);

  306. 

  307.     flag(direct_8x8_inference_flag);

  308. 

  309.     flag(frame_cropping_flag);

  310.     if (current->frame_cropping_flag) {

  311.         ue(frame_crop_left_offset,   0, H264_MAX_WIDTH);

  312.         ue(frame_crop_right_offset,  0, H264_MAX_WIDTH);

  313.         ue(frame_crop_top_offset,    0, H264_MAX_HEIGHT);

  314.         ue(frame_crop_bottom_offset, 0, H264_MAX_HEIGHT);

  315.     }

  316. 

  317.     flag(vui_parameters_present_flag);

  318.     if (current->vui_parameters_present_flag)

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

  320. 

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

  322. 

  323.     return 0;

  324. }

  325. 

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

  327.                                H264RawSPSExtension *current)

  328. {

  329.     int err;

  330. 

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

  332. 

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

  334.                                 1 << H264_NAL_SPS_EXT));

  335. 

  336.     ue(seq_parameter_set_id, 0, 31);

  337. 

  338.     ue(aux_format_idc, 0, 3);

  339. 

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

  341.         int bits;

  342. 

  343.         ue(bit_depth_aux_minus8, 0, 4);

  344.         flag(alpha_incr_flag);

  345. 

  346.         bits = current->bit_depth_aux_minus8 + 9;

  347.         u(bits, alpha_opaque_value,      0, MAX_UINT_BITS(bits));

  348.         u(bits, alpha_transparent_value, 0, MAX_UINT_BITS(bits));

  349.     }

  350. 

  351.     flag(additional_extension_flag);

  352. 

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

  354. 

  355.     return 0;

  356. }

  357. 

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

  359.                      H264RawPPS *current)

  360. {

  361.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  362.     const H264RawSPS *sps;

  363.     int err, i;

  364. 

  365.     HEADER("Picture Parameter Set");

  366. 

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

  368.                                 1 << H264_NAL_PPS));

  369. 

  370.     ue(pic_parameter_set_id, 0, 255);

  371.     ue(seq_parameter_set_id, 0, 31);

  372. 

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

  374.     if (!sps) {

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

  376.                current->seq_parameter_set_id);

  377.         return AVERROR_INVALIDDATA;

  378.     }

  379. 

  380.     flag(entropy_coding_mode_flag);

  381.     flag(bottom_field_pic_order_in_frame_present_flag);

  382. 

  383.     ue(num_slice_groups_minus1, 0, 7);

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

  385.         unsigned int pic_size;

  386.         int iGroup;

  387. 

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

  389.                    (sps->pic_height_in_map_units_minus1 + 1);

  390. 

  391.         ue(slice_group_map_type, 0, 6);

  392. 

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

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

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

  396. 

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

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

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

  400.                 ues(bottom_right[iGroup],

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

  402.             }

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

  404.                    current->slice_group_map_type == 4 ||

  405.                    current->slice_group_map_type == 5) {

  406.             flag(slice_group_change_direction_flag);

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

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

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

  410. 

  411.             allocate(current->slice_group_id,

  412.                      current->pic_size_in_map_units_minus1 + 1);

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

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

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

  416.         }

  417.     }

  418. 

  419.     ue(num_ref_idx_l0_default_active_minus1, 0, 31);

  420.     ue(num_ref_idx_l1_default_active_minus1, 0, 31);

  421. 

  422.     flag(weighted_pred_flag);

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

  424. 

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

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

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

  428. 

  429.     flag(deblocking_filter_control_present_flag);

  430.     flag(constrained_intra_pred_flag);

  431.     flag(redundant_pic_cnt_present_flag);

  432. 

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

  434.     {

  435.         flag(transform_8x8_mode_flag);

  436. 

  437.         flag(pic_scaling_matrix_present_flag);

  438.         if (current->pic_scaling_matrix_present_flag) {

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

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

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

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

  443.                     if (i < 6)

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

  445.                                                  &current->scaling_list_4x4[i],

  446.                                                  16));

  447.                     else

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

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

  450.                                                  64));

  451.                 }

  452.             }

  453.         }

  454. 

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

  456.     } else {

  457.         infer(transform_8x8_mode_flag, 0);

  458.         infer(pic_scaling_matrix_present_flag, 0);

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

  460.     }

  461. 

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

  463. 

  464.     return 0;

  465. }

  466. 

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

  468.                                       H264RawSEIBufferingPeriod *current)

  469. {

  470.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  471.     const H264RawSPS *sps;

  472.     int err, i, length;

  473. 

  474.     ue(seq_parameter_set_id, 0, 31);

  475. 

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

  477.     if (!sps) {

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

  479.                current->seq_parameter_set_id);

  480.         return AVERROR_INVALIDDATA;

  481.     }

  482.     h264->active_sps = sps;

  483. 

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

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

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

  487.             xu(length, initial_cpb_removal_delay[SchedSelIdx],

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

  489.                1, MAX_UINT_BITS(length), 1, i);

  490.             xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],

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

  492.                0, MAX_UINT_BITS(length), 1, i);

  493.         }

  494.     }

  495. 

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

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

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

  499.             xu(length, initial_cpb_removal_delay[SchedSelIdx],

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

  501.                1, MAX_UINT_BITS(length), 1, i);

  502.             xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],

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

  504.                0, MAX_UINT_BITS(length), 1, i);

  505.         }

  506.     }

  507. 

  508.     return 0;

  509. }

  510. 

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

  512.                                    H264RawSEIPicTimestamp *current)

  513. {

  514.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  515.     const H264RawSPS *sps;

  516.     uint8_t time_offset_length;

  517.     int err;

  518. 

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

  520.     flag(nuit_field_based_flag);

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

  522.     flag(full_timestamp_flag);

  523.     flag(discontinuity_flag);

  524.     flag(cnt_dropped_flag);

  525.     u(8, n_frames, 0, 255);

  526.     if (current->full_timestamp_flag) {

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

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

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

  530.     } else {

  531.         flag(seconds_flag);

  532.         if (current->seconds_flag) {

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

  534.             flag(minutes_flag);

  535.             if (current->minutes_flag) {

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

  537.                 flag(hours_flag);

  538.                 if (current->hours_flag)

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

  540.             }

  541.         }

  542.     }

  543. 

  544.     sps = h264->active_sps;

  545.     if (sps->vui.nal_hrd_parameters_present_flag)

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

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

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

  549.     else

  550.         time_offset_length = 24;

  551. 

  552.     if (time_offset_length > 0)

  553.         u(time_offset_length, time_offset,

  554.           0, MAX_UINT_BITS(time_offset_length));

  555.     else

  556.         infer(time_offset, 0);

  557. 

  558.     return 0;

  559. }

  560. 

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

  562.                                 H264RawSEIPicTiming *current)

  563. {

  564.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  565.     const H264RawSPS *sps;

  566.     int err;

  567. 

  568.     sps = h264->active_sps;

  569.     if (!sps) {

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

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

  572.         int i, k = -1;

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

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

  575.                 if (k >= 0) {

  576.                     k = -1;

  577.                     break;

  578.                 }

  579.                 k = i;

  580.             }

  581.         }

  582.         if (k >= 0)

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

  584.     }

  585.     if (!sps) {

  586.         av_log(ctx->log_ctx, AV_LOG_ERROR,

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

  588.         return AVERROR_INVALIDDATA;

  589.     }

  590. 

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

  592.         sps->vui.vcl_hrd_parameters_present_flag) {

  593.         const H264RawHRD *hrd;

  594. 

  595.         if (sps->vui.nal_hrd_parameters_present_flag)

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

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

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

  599.         else {

  600.             av_log(ctx->log_ctx, AV_LOG_ERROR,

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

  602.             return AVERROR_INVALIDDATA;

  603.         }

  604. 

  605.         u(hrd->cpb_removal_delay_length_minus1 + 1, cpb_removal_delay,

  606.           0, MAX_UINT_BITS(hrd->cpb_removal_delay_length_minus1 + 1));

  607.         u(hrd->dpb_output_delay_length_minus1 + 1, dpb_output_delay,

  608.           0, MAX_UINT_BITS(hrd->dpb_output_delay_length_minus1 + 1));

  609.     }

  610. 

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

  612.         static const int num_clock_ts[9] = {

  613.             1, 1, 1, 2, 2, 3, 3, 2, 3

  614.         };

  615.         int i;

  616. 

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

  618.         if (current->pic_struct > 8)

  619.             return AVERROR_INVALIDDATA;

  620. 

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

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

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

  624.                 CHECK(FUNC(sei_pic_timestamp)(ctx, rw, &current->timestamp[i]));

  625.         }

  626.     }

  627. 

  628.     return 0;

  629. }

  630. 

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

  632.                                    H264RawSEIPanScanRect *current)

  633. {

  634.     int err, i;

  635. 

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

  637.     flag(pan_scan_rect_cancel_flag);

  638. 

  639.     if (!current->pan_scan_rect_cancel_flag) {

  640.         ue(pan_scan_cnt_minus1, 0, 2);

  641. 

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

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

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

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

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

  647.         }

  648. 

  649.         ue(pan_scan_rect_repetition_period, 0, 16384);

  650.     }

  651. 

  652.     return 0;

  653. }

  654. 

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

  656.                                           H264RawSEIUserDataRegistered *current,

  657.                                           uint32_t *payload_size)

  658. {

  659.     int err, i, j;

  660. 

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

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

  663.         i = 1;

  664.     else {

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

  666.         i = 2;

  667.     }

  668. 

  669. #ifdef READ

  670.     if (*payload_size < i) {

  671.         av_log(ctx->log_ctx, AV_LOG_ERROR,

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

  673.         return AVERROR_INVALIDDATA;

  674.     }

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

  676. #else

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

  678. #endif

  679. 

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

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

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

  683. 

  684.     return 0;

  685. }

  686. 

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

  688.                                             H264RawSEIUserDataUnregistered *current,

  689.                                             uint32_t *payload_size)

  690. {

  691.     int err, i;

  692. 

  693. #ifdef READ

  694.     if (*payload_size < 16) {

  695.         av_log(ctx->log_ctx, AV_LOG_ERROR,

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

  697.         return AVERROR_INVALIDDATA;

  698.     }

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

  700. #else

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

  702. #endif

  703. 

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

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

  706. 

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

  708. 

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

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

  711. 

  712.     return 0;

  713. }

  714. 

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

  716.                                     H264RawSEIRecoveryPoint *current)

  717. {

  718.     int err;

  719. 

  720.     ue(recovery_frame_cnt, 0, 65535);

  721.     flag(exact_match_flag);

  722.     flag(broken_link_flag);

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

  724. 

  725.     return 0;

  726. }

  727. 

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

  729.                                          H264RawSEIDisplayOrientation *current)

  730. {

  731.     int err;

  732. 

  733.     flag(display_orientation_cancel_flag);

  734.     if (!current->display_orientation_cancel_flag) {

  735.         flag(hor_flip);

  736.         flag(ver_flip);

  737.         u(16, anticlockwise_rotation, 0, 65535);

  738.         ue(display_orientation_repetition_period, 0, 16384);

  739.         flag(display_orientation_extension_flag);

  740.     }

  741. 

  742.     return 0;

  743. }

  744. 

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

  746.                                                      H264RawSEIMasteringDisplayColourVolume *current)

  747. {

  748.     int err, c;

  749. 

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

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

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

  753.     }

  754. 

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

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

  757. 

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

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

  760. 

  761.     return 0;

  762. }

  763. 

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

  765.                              H264RawSEIPayload *current)

  766. {

  767.     int err, i;

  768.     int start_position, end_position;

  769. 

  770. #ifdef READ

  771.     start_position = get_bits_count(rw);

  772. #else

  773.     start_position = put_bits_count(rw);

  774. #endif

  775. 

  776.     switch (current->payload_type) {

  777.     case H264_SEI_TYPE_BUFFERING_PERIOD:

  778.         CHECK(FUNC(sei_buffering_period)

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

  780.         break;

  781.     case H264_SEI_TYPE_PIC_TIMING:

  782.         CHECK(FUNC(sei_pic_timing)

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

  784.         break;

  785.     case H264_SEI_TYPE_PAN_SCAN_RECT:

  786.         CHECK(FUNC(sei_pan_scan_rect)

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

  788.         break;

  789.     case H264_SEI_TYPE_FILLER_PAYLOAD:

  790.         {

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

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

  793.         }

  794.         break;

  795.     case H264_SEI_TYPE_USER_DATA_REGISTERED:

  796.         CHECK(FUNC(sei_user_data_registered)

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

  798.         break;

  799.     case H264_SEI_TYPE_USER_DATA_UNREGISTERED:

  800.         CHECK(FUNC(sei_user_data_unregistered)

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

  802.         break;

  803.     case H264_SEI_TYPE_RECOVERY_POINT:

  804.         CHECK(FUNC(sei_recovery_point)

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

  806.         break;

  807.     case H264_SEI_TYPE_DISPLAY_ORIENTATION:

  808.         CHECK(FUNC(sei_display_orientation)

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

  810.         break;

  811.     case H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME:

  812.         CHECK(FUNC(sei_mastering_display_colour_volume)

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

  814.         break;

  815.     default:

  816.         {

  817. #ifdef READ

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

  819. #endif

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

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

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

  823.         }

  824.     }

  825. 

  826.     if (byte_alignment(rw)) {

  827.         fixed(1, bit_equal_to_one, 1);

  828.         while (byte_alignment(rw))

  829.             fixed(1, bit_equal_to_zero, 0);

  830.     }

  831. 

  832. #ifdef READ

  833.     end_position = get_bits_count(rw);

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

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

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

  837.                8 * current->payload_size,

  838.                end_position - start_position);

  839.         return AVERROR_INVALIDDATA;

  840.     }

  841. #else

  842.     end_position = put_bits_count(rw);

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

  844. #endif

  845. 

  846.     return 0;

  847. }

  848. 

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

  850.                      H264RawSEI *current)

  851. {

  852.     int err, k;

  853. 

  854.     HEADER("Supplemental Enhancement Information");

  855. 

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

  857.                                 1 << H264_NAL_SEI));

  858. 

  859. #ifdef READ

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

  861.         uint32_t payload_type = 0;

  862.         uint32_t payload_size = 0;

  863.         uint32_t tmp;

  864. 

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

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

  867.             payload_type += 255;

  868.         }

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

  870.         payload_type += tmp;

  871. 

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

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

  874.             payload_size += 255;

  875.         }

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

  877.         payload_size += tmp;

  878. 

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

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

  881. 

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

  883. 

  884.         if (!cbs_h2645_read_more_rbsp_data(rw))

  885.             break;

  886.     }

  887.     if (k >= H264_MAX_SEI_PAYLOADS) {

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

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

  890.         return AVERROR_INVALIDDATA;

  891.     }

  892.     current->payload_count = k + 1;

  893. #else

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

  895.         PutBitContext start_state;

  896.         uint32_t tmp;

  897.         int need_size, i;

  898. 

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

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

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

  902.         start_state = *rw;

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

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

  905.             *rw = start_state;

  906. 

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

  908.             while (tmp >= 255) {

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

  910.                 tmp -= 255;

  911.             }

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

  913. 

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

  915.             while (tmp >= 255) {

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

  917.                 tmp -= 255;

  918.             }

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

  920. 

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

  922.         }

  923.     }

  924. #endif

  925. 

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

  927. 

  928.     return 0;

  929. }

  930. 

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

  932.                      H264RawAUD *current)

  933. {

  934.     int err;

  935. 

  936.     HEADER("Access Unit Delimiter");

  937. 

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

  939.                                 1 << H264_NAL_AUD));

  940. 

  941.     u(3, primary_pic_type, 0, 7);

  942. 

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

  944. 

  945.     return 0;

  946. }

  947. 

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

  949.                                            H264RawSliceHeader *current)

  950. {

  951.     CodedBitstreamH264Context *h264 = ctx->priv_data;

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

  953.     int err, i, mopn;

  954. 

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

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

  957.         flag(ref_pic_list_modification_flag_l0);

  958.         if (current->ref_pic_list_modification_flag_l0) {

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

  960.                 xue(modification_of_pic_nums_idc,

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

  962. 

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

  964.                 if (mopn == 3)

  965.                     break;

  966. 

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

  968.                     xue(abs_diff_pic_num_minus1,

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

  970.                         0, (1 + current->field_pic_flag) *

  971.                         (1 << (sps->log2_max_frame_num_minus4 + 4)), 0);

  972.                 else if (mopn == 2)

  973.                     xue(long_term_pic_num,

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

  975.                         0, sps->max_num_ref_frames - 1, 0);

  976.             }

  977.         }

  978.     }

  979. 

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

  981.         flag(ref_pic_list_modification_flag_l1);

  982.         if (current->ref_pic_list_modification_flag_l1) {

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

  984.                 xue(modification_of_pic_nums_idc,

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

  986. 

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

  988.                 if (mopn == 3)

  989.                     break;

  990. 

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

  992.                     xue(abs_diff_pic_num_minus1,

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

  994.                         0, (1 + current->field_pic_flag) *

  995.                         (1 << (sps->log2_max_frame_num_minus4 + 4)), 0);

  996.                 else if (mopn == 2)

  997.                     xue(long_term_pic_num,

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

  999.                         0, sps->max_num_ref_frames - 1, 0);

  1000.             }

  1001.         }

  1002.     }

  1003. 

  1004.     return 0;

  1005. }

  1006. 

  1007. static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,

  1008.                                    H264RawSliceHeader *current)

  1009. {

  1010.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  1011.     const H264RawSPS *sps = h264->active_sps;

  1012.     int chroma;

  1013.     int err, i, j;

  1014. 

  1015.     ue(luma_log2_weight_denom, 0, 7);

  1016. 

  1017.     chroma = !sps->separate_colour_plane_flag && sps->chroma_format_idc != 0;

  1018.     if (chroma)

  1019.         ue(chroma_log2_weight_denom, 0, 7);

  1020. 

  1021.     for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {

  1022.         flags(luma_weight_l0_flag[i], 1, i);

  1023.         if (current->luma_weight_l0_flag[i]) {

  1024.             ses(luma_weight_l0[i], -128, +127, 1, i);

  1025.             ses(luma_offset_l0[i], -128, +127, 1, i);

  1026.         }

  1027.         if (chroma) {

  1028.             flags(chroma_weight_l0_flag[i], 1, i);

  1029.             if (current->chroma_weight_l0_flag[i]) {

  1030.                 for (j = 0; j < 2; j++) {

  1031.                     ses(chroma_weight_l0[i][j], -128, +127, 2, i, j);

  1032.                     ses(chroma_offset_l0[i][j], -128, +127, 2, i, j);

  1033.                 }

  1034.             }

  1035.         }

  1036.     }

  1037. 

  1038.     if (current->slice_type % 5 == 1) {

  1039.         for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {

  1040.             flags(luma_weight_l1_flag[i], 1, i);

  1041.             if (current->luma_weight_l1_flag[i]) {

  1042.                 ses(luma_weight_l1[i], -128, +127, 1, i);

  1043.                 ses(luma_offset_l1[i], -128, +127, 1, i);

  1044.             }

  1045.             if (chroma) {

  1046.                 flags(chroma_weight_l1_flag[i], 1, i);

  1047.                 if (current->chroma_weight_l1_flag[i]) {

  1048.                     for (j = 0; j < 2; j++) {

  1049.                         ses(chroma_weight_l1[i][j], -128, +127, 2, i, j);

  1050.                         ses(chroma_offset_l1[i][j], -128, +127, 2, i, j);

  1051.                     }

  1052.                 }

  1053.             }

  1054.         }

  1055.     }

  1056. 

  1057.     return 0;

  1058. }

  1059. 

  1060. static int FUNC(dec_ref_pic_marking)(CodedBitstreamContext *ctx, RWContext *rw,

  1061.                                      H264RawSliceHeader *current, int idr_pic_flag)

  1062. {

  1063.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  1064.     const H264RawSPS *sps = h264->active_sps;

  1065.     int err, i;

  1066.     uint32_t mmco;

  1067. 

  1068.     if (idr_pic_flag) {

  1069.         flag(no_output_of_prior_pics_flag);

  1070.         flag(long_term_reference_flag);

  1071.     } else {

  1072.         flag(adaptive_ref_pic_marking_mode_flag);

  1073.         if (current->adaptive_ref_pic_marking_mode_flag) {

  1074.             for (i = 0; i < H264_MAX_MMCO_COUNT; i++) {

  1075.                 xue(memory_management_control_operation,

  1076.                     current->mmco[i].memory_management_control_operation,

  1077.                     0, 6, 0);

  1078. 

  1079.                 mmco = current->mmco[i].memory_management_control_operation;

  1080.                 if (mmco == 0)

  1081.                     break;

  1082. 

  1083.                 if (mmco == 1 || mmco == 3)

  1084.                     xue(difference_of_pic_nums_minus1,

  1085.                         current->mmco[i].difference_of_pic_nums_minus1,

  1086.                         0, INT32_MAX, 0);

  1087.                 if (mmco == 2)

  1088.                     xue(long_term_pic_num,

  1089.                         current->mmco[i].long_term_pic_num,

  1090.                         0, sps->max_num_ref_frames - 1, 0);

  1091.                 if (mmco == 3 || mmco == 6)

  1092.                     xue(long_term_frame_idx,

  1093.                         current->mmco[i].long_term_frame_idx,

  1094.                         0, sps->max_num_ref_frames - 1, 0);

  1095.                 if (mmco == 4)

  1096.                     xue(max_long_term_frame_idx_plus1,

  1097.                         current->mmco[i].max_long_term_frame_idx_plus1,

  1098.                         0, sps->max_num_ref_frames, 0);

  1099.             }

  1100.             if (i == H264_MAX_MMCO_COUNT) {

  1101.                 av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many "

  1102.                        "memory management control operations.\n");

  1103.                 return AVERROR_INVALIDDATA;

  1104.             }

  1105.         }

  1106.     }

  1107. 

  1108.     return 0;

  1109. }

  1110. 

  1111. static int FUNC(slice_header)(CodedBitstreamContext *ctx, RWContext *rw,

  1112.                               H264RawSliceHeader *current)

  1113. {

  1114.     CodedBitstreamH264Context *h264 = ctx->priv_data;

  1115.     const H264RawSPS *sps;

  1116.     const H264RawPPS *pps;

  1117.     int err;

  1118.     int idr_pic_flag;

  1119.     int slice_type_i, slice_type_p, slice_type_b;

  1120.     int slice_type_si, slice_type_sp;

  1121. 

  1122.     HEADER("Slice Header");

  1123. 

  1124.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,

  1125.                                 1 << H264_NAL_SLICE     |

  1126.                                 1 << H264_NAL_IDR_SLICE |

  1127.                                 1 << H264_NAL_AUXILIARY_SLICE));

  1128. 

  1129.     if (current->nal_unit_header.nal_unit_type == H264_NAL_AUXILIARY_SLICE) {

  1130.         if (!h264->last_slice_nal_unit_type) {

  1131.             av_log(ctx->log_ctx, AV_LOG_ERROR, "Auxiliary slice "

  1132.                    "is not decodable without the main picture "

  1133.                    "in the same access unit.\n");

  1134.             return AVERROR_INVALIDDATA;

  1135.         }

  1136.     } else {

  1137.         h264->last_slice_nal_unit_type =

  1138.             current->nal_unit_header.nal_unit_type;

  1139.     }

  1140.     idr_pic_flag = h264->last_slice_nal_unit_type == H264_NAL_IDR_SLICE;

  1141. 

  1142.     ue(first_mb_in_slice, 0, H264_MAX_MB_PIC_SIZE - 1);

  1143.     ue(slice_type, 0, 9);

  1144. 

  1145.     slice_type_i  = current->slice_type % 5 == 2;

  1146.     slice_type_p  = current->slice_type % 5 == 0;

  1147.     slice_type_b  = current->slice_type % 5 == 1;

  1148.     slice_type_si = current->slice_type % 5 == 4;

  1149.     slice_type_sp = current->slice_type % 5 == 3;

  1150. 

  1151.     if (idr_pic_flag && !(slice_type_i || slice_type_si)) {

  1152.         av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid slice type %d "

  1153.                "for IDR picture.\n", current->slice_type);

  1154.         return AVERROR_INVALIDDATA;

  1155.     }

  1156. 

  1157.     ue(pic_parameter_set_id, 0, 255);

  1158. 

  1159.     pps = h264->pps[current->pic_parameter_set_id];

  1160.     if (!pps) {

  1161.         av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",

  1162.                current->pic_parameter_set_id);

  1163.         return AVERROR_INVALIDDATA;

  1164.     }

  1165.     h264->active_pps = pps;

  1166. 

  1167.     sps = h264->sps[pps->seq_parameter_set_id];

  1168.     if (!sps) {

  1169.         av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",

  1170.                pps->seq_parameter_set_id);

  1171.         return AVERROR_INVALIDDATA;

  1172.     }

  1173.     h264->active_sps = sps;

  1174. 

  1175.     if (sps->separate_colour_plane_flag)

  1176.         u(2, colour_plane_id, 0, 2);

  1177. 

  1178.     u(sps->log2_max_frame_num_minus4 + 4, frame_num,

  1179.       0, MAX_UINT_BITS(sps->log2_max_frame_num_minus4 + 4));

  1180. 

  1181.     if (!sps->frame_mbs_only_flag) {

  1182.         flag(field_pic_flag);

  1183.         if (current->field_pic_flag)

  1184.             flag(bottom_field_flag);

  1185.         else

  1186.             infer(bottom_field_flag, 0);

  1187.     } else {

  1188.         infer(field_pic_flag,    0);

  1189.         infer(bottom_field_flag, 0);

  1190.     }

  1191. 

  1192.     if (idr_pic_flag)

  1193.         ue(idr_pic_id, 0, 65535);

  1194. 

  1195.     if (sps->pic_order_cnt_type == 0) {

  1196.         u(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, pic_order_cnt_lsb,

  1197.           0, MAX_UINT_BITS(sps->log2_max_pic_order_cnt_lsb_minus4 + 4));

  1198.         if (pps->bottom_field_pic_order_in_frame_present_flag &&

  1199.             !current->field_pic_flag)

  1200.             se(delta_pic_order_cnt_bottom, INT32_MIN + 1, INT32_MAX);

  1201. 

  1202.     } else if (sps->pic_order_cnt_type == 1) {

  1203.         if (!sps->delta_pic_order_always_zero_flag) {

  1204.             se(delta_pic_order_cnt[0], INT32_MIN + 1, INT32_MAX);

  1205.             if (pps->bottom_field_pic_order_in_frame_present_flag &&

  1206.                 !current->field_pic_flag)

  1207.                 se(delta_pic_order_cnt[1], INT32_MIN + 1, INT32_MAX);

  1208.             else

  1209.                 infer(delta_pic_order_cnt[1], 0);

  1210.         } else {

  1211.             infer(delta_pic_order_cnt[0], 0);

  1212.             infer(delta_pic_order_cnt[1], 0);

  1213.         }

  1214.     }

  1215. 

  1216.     if (pps->redundant_pic_cnt_present_flag)

  1217.         ue(redundant_pic_cnt, 0, 127);

  1218. 

  1219.     if (slice_type_b)

  1220.         flag(direct_spatial_mv_pred_flag);

  1221. 

  1222.     if (slice_type_p || slice_type_sp || slice_type_b) {

  1223.         flag(num_ref_idx_active_override_flag);

  1224.         if (current->num_ref_idx_active_override_flag) {

  1225.             ue(num_ref_idx_l0_active_minus1, 0, 31);

  1226.             if (slice_type_b)

  1227.                 ue(num_ref_idx_l1_active_minus1, 0, 31);

  1228.         } else {

  1229.             infer(num_ref_idx_l0_active_minus1,

  1230.                   pps->num_ref_idx_l0_default_active_minus1);

  1231.             infer(num_ref_idx_l1_active_minus1,

  1232.                   pps->num_ref_idx_l1_default_active_minus1);

  1233.         }

  1234.     }

  1235. 

  1236.     if (current->nal_unit_header.nal_unit_type == 20 ||

  1237.         current->nal_unit_header.nal_unit_type == 21) {

  1238.         av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC / 3DAVC not supported.\n");

  1239.         return AVERROR_PATCHWELCOME;

  1240.     } else {

  1241.         CHECK(FUNC(ref_pic_list_modification)(ctx, rw, current));

  1242.     }

  1243. 

  1244.     if ((pps->weighted_pred_flag && (slice_type_p || slice_type_sp)) ||

  1245.         (pps->weighted_bipred_idc == 1 && slice_type_b)) {

  1246.         CHECK(FUNC(pred_weight_table)(ctx, rw, current));

  1247.     }

  1248. 

  1249.     if (current->nal_unit_header.nal_ref_idc != 0) {

  1250.         CHECK(FUNC(dec_ref_pic_marking)(ctx, rw, current, idr_pic_flag));

  1251.     }

  1252. 

  1253.     if (pps->entropy_coding_mode_flag &&

  1254.         !slice_type_i && !slice_type_si) {

  1255.         ue(cabac_init_idc, 0, 2);

  1256.     }

  1257. 

  1258.     se(slice_qp_delta, - 51 - 6 * sps->bit_depth_luma_minus8,

  1259.                        + 51 + 6 * sps->bit_depth_luma_minus8);

  1260.     if (slice_type_sp || slice_type_si) {

  1261.         if (slice_type_sp)

  1262.             flag(sp_for_switch_flag);

  1263.         se(slice_qs_delta, -51, +51);

  1264.     }

  1265. 

  1266.     if (pps->deblocking_filter_control_present_flag) {

  1267.         ue(disable_deblocking_filter_idc, 0, 2);

  1268.         if (current->disable_deblocking_filter_idc != 1) {

  1269.             se(slice_alpha_c0_offset_div2, -6, +6);

  1270.             se(slice_beta_offset_div2,     -6, +6);

  1271.         } else {

  1272.             infer(slice_alpha_c0_offset_div2, 0);

  1273.             infer(slice_beta_offset_div2,     0);

  1274.         }

  1275.     } else {

  1276.         infer(disable_deblocking_filter_idc, 0);

  1277.         infer(slice_alpha_c0_offset_div2,    0);

  1278.         infer(slice_beta_offset_div2,        0);

  1279.     }

  1280. 

  1281.     if (pps->num_slice_groups_minus1 > 0 &&

  1282.         pps->slice_group_map_type >= 3 &&

  1283.         pps->slice_group_map_type <= 5) {

  1284.         unsigned int pic_size, max, bits;

  1285. 

  1286.         pic_size = (sps->pic_width_in_mbs_minus1 + 1) *

  1287.                    (sps->pic_height_in_map_units_minus1 + 1);

  1288.         max = (pic_size + pps->slice_group_change_rate_minus1) /

  1289.               (pps->slice_group_change_rate_minus1 + 1);

  1290.         bits = av_log2(2 * max - 1);

  1291. 

  1292.         u(bits, slice_group_change_cycle, 0, max);

  1293.     }

  1294. 

  1295.     if (pps->entropy_coding_mode_flag) {

  1296.         while (byte_alignment(rw))

  1297.             fixed(1, cabac_alignment_one_bit, 1);

  1298.     }

  1299. 

  1300.     return 0;

  1301. }

  1302. 

  1303. static int FUNC(filler)(CodedBitstreamContext *ctx, RWContext *rw,

  1304.                         H264RawFiller *current)

  1305. {

  1306.     int err;

  1307. 

  1308.     HEADER("Filler Data");

  1309. 

  1310.     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,

  1311.                                 1 << H264_NAL_FILLER_DATA));

  1312. 

  1313. #ifdef READ

  1314.     while (show_bits(rw, 8) == 0xff) {

  1315.         fixed(8, ff_byte, 0xff);

  1316.         ++current->filler_size;

  1317.     }

  1318. #else

  1319.     {

  1320.         uint32_t i;

  1321.         for (i = 0; i < current->filler_size; i++)

  1322.             fixed(8, ff_byte, 0xff);

  1323.     }

  1324. #endif

  1325. 

  1326.     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));

  1327. 

  1328.     return 0;

  1329. }