git.sesse.net Git - ffmpeg/blob - libavcodec/cbs_h265_syntax_template.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 static int FUNC(rbsp_trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw)
  20 {
  21     int err;
  22
  23     fixed(1, rbsp_stop_one_bit, 1);
  24     while (byte_alignment(rw) != 0)
  25         fixed(1, rbsp_alignment_zero_bit, 0);
  26
  27     return 0;
  28 }
  29
  30 static int FUNC(nal_unit_header)(CodedBitstreamContext *ctx, RWContext *rw,
  31                                  H265RawNALUnitHeader *current,
  32                                  int expected_nal_unit_type)
  33 {
  34     int err;
  35
  36     u(1, forbidden_zero_bit, 0, 0);
  37
  38     if (expected_nal_unit_type >= 0)
  39         u(6, nal_unit_type, expected_nal_unit_type,
  40                             expected_nal_unit_type);
  41     else
  42         u(6, nal_unit_type, 0, 63);
  43
  44     u(6, nuh_layer_id,          0, 62);
  45     u(3, nuh_temporal_id_plus1, 1,  7);
  46
  47     return 0;
  48 }
  49
  50 static int FUNC(byte_alignment)(CodedBitstreamContext *ctx, RWContext *rw)
  51 {
  52     int err;
  53
  54     fixed(1, alignment_bit_equal_to_one, 1);
  55     while (byte_alignment(rw) != 0)
  56         fixed(1, alignment_bit_equal_to_zero, 0);
  57
  58     return 0;
  59 }
  60
  61 static int FUNC(extension_data)(CodedBitstreamContext *ctx, RWContext *rw,
  62                                 H265RawPSExtensionData *current)
  63 {
  64     int err;
  65     size_t k;
  66 #ifdef READ
  67     GetBitContext start;
  68     uint8_t bit;
  69     start = *rw;
  70     for (k = 0; cbs_h2645_read_more_rbsp_data(rw); k++)
  71         skip_bits(rw, 1);
  72     current->bit_length = k;
  73     if (k > 0) {
  74         *rw = start;
  75         allocate(current->data, (current->bit_length + 7) / 8);
  76         for (k = 0; k < current->bit_length; k++) {
  77             xu(1, extension_data, bit, 0, 1, 0);
  78             current->data[k / 8] |= bit << (7 - k % 8);
  79         }
  80     }
  81 #else
  82     for (k = 0; k < current->bit_length; k++)
  83         xu(1, extension_data, current->data[k / 8] >> (7 - k % 8), 0, 1, 0);
  84 #endif
  85     return 0;
  86 }
  87
  88 static int FUNC(profile_tier_level)(CodedBitstreamContext *ctx, RWContext *rw,
  89                                     H265RawProfileTierLevel *current,
  90                                     int profile_present_flag,
  91                                     int max_num_sub_layers_minus1)
  92 {
  93     int err, i, j;
  94
  95     if (profile_present_flag) {
  96         u(2, general_profile_space, 0, 0);
  97         flag(general_tier_flag);
  98         u(5, general_profile_idc, 0, 31);
  99
 100         for (j = 0; j < 32; j++)
 101             flags(general_profile_compatibility_flag[j], 1, j);
 102
 103         flag(general_progressive_source_flag);
 104         flag(general_interlaced_source_flag);
 105         flag(general_non_packed_constraint_flag);
 106         flag(general_frame_only_constraint_flag);
 107
 108 #define profile_compatible(x) (current->general_profile_idc == (x) || \
 109                                current->general_profile_compatibility_flag[x])
 110         if (profile_compatible(4) || profile_compatible(5) ||
 111             profile_compatible(6) || profile_compatible(7) ||
 112             profile_compatible(8) || profile_compatible(9) ||
 113             profile_compatible(10)) {
 114             flag(general_max_12bit_constraint_flag);
 115             flag(general_max_10bit_constraint_flag);
 116             flag(general_max_8bit_constraint_flag);
 117             flag(general_max_422chroma_constraint_flag);
 118             flag(general_max_420chroma_constraint_flag);
 119             flag(general_max_monochrome_constraint_flag);
 120             flag(general_intra_constraint_flag);
 121             flag(general_one_picture_only_constraint_flag);
 122             flag(general_lower_bit_rate_constraint_flag);
 123
 124             if (profile_compatible(5) || profile_compatible(9) ||
 125                 profile_compatible(10)) {
 126                 flag(general_max_14bit_constraint_flag);
 127                 fixed(24, general_reserved_zero_33bits, 0);
 128                 fixed( 9, general_reserved_zero_33bits, 0);
 129             } else {
 130                 fixed(24, general_reserved_zero_34bits, 0);
 131                 fixed(10, general_reserved_zero_34bits, 0);
 132             }
 133         } else {
 134             fixed(24, general_reserved_zero_43bits, 0);
 135             fixed(19, general_reserved_zero_43bits, 0);
 136         }
 137
 138         if (profile_compatible(1) || profile_compatible(2) ||
 139             profile_compatible(3) || profile_compatible(4) ||
 140             profile_compatible(5) || profile_compatible(9)) {
 141             flag(general_inbld_flag);
 142         } else {
 143             fixed(1, general_reserved_zero_bit, 0);
 144         }
 145 #undef profile_compatible
 146     }
 147
 148     u(8, general_level_idc, 0, 255);
 149
 150     for (i = 0; i < max_num_sub_layers_minus1; i++) {
 151         flags(sub_layer_profile_present_flag[i], 1, i);
 152         flags(sub_layer_level_present_flag[i],   1, i);
 153     }
 154
 155     if (max_num_sub_layers_minus1 > 0) {
 156         for (i = max_num_sub_layers_minus1; i < 8; i++)
 157             fixed(2, reserved_zero_2bits, 0);
 158     }
 159
 160     for (i = 0; i < max_num_sub_layers_minus1; i++) {
 161         if (current->sub_layer_profile_present_flag[i])
 162             return AVERROR_PATCHWELCOME;
 163         if (current->sub_layer_level_present_flag[i])
 164             return AVERROR_PATCHWELCOME;
 165     }
 166
 167     return 0;
 168 }
 169
 170 static int FUNC(sub_layer_hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
 171                                           H265RawHRDParameters *hrd,
 172                                           int nal, int sub_layer_id)
 173 {
 174     H265RawSubLayerHRDParameters *current;
 175     int err, i;
 176
 177     if (nal)
 178         current = &hrd->nal_sub_layer_hrd_parameters[sub_layer_id];
 179     else
 180         current = &hrd->vcl_sub_layer_hrd_parameters[sub_layer_id];
 181
 182     for (i = 0; i <= hrd->cpb_cnt_minus1[sub_layer_id]; i++) {
 183         ues(bit_rate_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
 184         ues(cpb_size_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
 185         if (hrd->sub_pic_hrd_params_present_flag) {
 186             ues(cpb_size_du_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
 187             ues(bit_rate_du_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
 188         }
 189         flags(cbr_flag[i], 1, i);
 190     }
 191
 192     return 0;
 193 }
 194
 195 static int FUNC(hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
 196                                 H265RawHRDParameters *current, int common_inf_present_flag,
 197                                 int max_num_sub_layers_minus1)
 198 {
 199     int err, i;
 200
 201     if (common_inf_present_flag) {
 202         flag(nal_hrd_parameters_present_flag);
 203         flag(vcl_hrd_parameters_present_flag);
 204
 205         if (current->nal_hrd_parameters_present_flag ||
 206             current->vcl_hrd_parameters_present_flag) {
 207             flag(sub_pic_hrd_params_present_flag);
 208             if (current->sub_pic_hrd_params_present_flag) {
 209                 u(8, tick_divisor_minus2, 0, 255);
 210                 u(5, du_cpb_removal_delay_increment_length_minus1, 0, 31);
 211                 flag(sub_pic_cpb_params_in_pic_timing_sei_flag);
 212                 u(5, dpb_output_delay_du_length_minus1, 0, 31);
 213             }
 214
 215             u(4, bit_rate_scale, 0, 15);
 216             u(4, cpb_size_scale, 0, 15);
 217             if (current->sub_pic_hrd_params_present_flag)
 218                 u(4, cpb_size_du_scale, 0, 15);
 219
 220             u(5, initial_cpb_removal_delay_length_minus1, 0, 31);
 221             u(5, au_cpb_removal_delay_length_minus1,      0, 31);
 222             u(5, dpb_output_delay_length_minus1,          0, 31);
 223         } else {
 224             infer(sub_pic_hrd_params_present_flag, 0);
 225
 226             infer(initial_cpb_removal_delay_length_minus1, 23);
 227             infer(au_cpb_removal_delay_length_minus1,      23);
 228             infer(dpb_output_delay_length_minus1,          23);
 229         }
 230     }
 231
 232     for (i = 0; i <= max_num_sub_layers_minus1; i++) {
 233         flags(fixed_pic_rate_general_flag[i], 1, i);
 234
 235         if (!current->fixed_pic_rate_general_flag[i])
 236             flags(fixed_pic_rate_within_cvs_flag[i], 1, i);
 237         else
 238             infer(fixed_pic_rate_within_cvs_flag[i], 1);
 239
 240         if (current->fixed_pic_rate_within_cvs_flag[i]) {
 241             ues(elemental_duration_in_tc_minus1[i], 0, 2047, 1, i);
 242             infer(low_delay_hrd_flag[i], 0);
 243         } else
 244             flags(low_delay_hrd_flag[i], 1, i);
 245
 246         if (!current->low_delay_hrd_flag[i])
 247             ues(cpb_cnt_minus1[i], 0, 31, 1, i);
 248         else
 249             infer(cpb_cnt_minus1[i], 0);
 250
 251         if (current->nal_hrd_parameters_present_flag)
 252             CHECK(FUNC(sub_layer_hrd_parameters)(ctx, rw, current, 0, i));
 253         if (current->vcl_hrd_parameters_present_flag)
 254             CHECK(FUNC(sub_layer_hrd_parameters)(ctx, rw, current, 1, i));
 255     }
 256
 257     return 0;
 258 }
 259
 260 static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
 261                                 H265RawVUI *current, const H265RawSPS *sps)
 262 {
 263     int err;
 264
 265     flag(aspect_ratio_info_present_flag);
 266     if (current->aspect_ratio_info_present_flag) {
 267         u(8, aspect_ratio_idc, 0, 255);
 268         if (current->aspect_ratio_idc == 255) {
 269             u(16, sar_width,  0, 65535);
 270             u(16, sar_height, 0, 65535);
 271         }
 272     } else {
 273         infer(aspect_ratio_idc, 0);
 274     }
 275
 276     flag(overscan_info_present_flag);
 277     if (current->overscan_info_present_flag)
 278         flag(overscan_appropriate_flag);
 279
 280     flag(video_signal_type_present_flag);
 281     if (current->video_signal_type_present_flag) {
 282         u(3, video_format, 0, 7);
 283         flag(video_full_range_flag);
 284         flag(colour_description_present_flag);
 285         if (current->colour_description_present_flag) {
 286             u(8, colour_primaries,         0, 255);
 287             u(8, transfer_characteristics, 0, 255);
 288             u(8, matrix_coefficients,      0, 255);
 289         } else {
 290             infer(colour_primaries,         2);
 291             infer(transfer_characteristics, 2);
 292             infer(matrix_coefficients,      2);
 293         }
 294     } else {
 295         infer(video_format,             5);
 296         infer(video_full_range_flag,    0);
 297         infer(colour_primaries,         2);
 298         infer(transfer_characteristics, 2);
 299         infer(matrix_coefficients,      2);
 300     }
 301
 302     flag(chroma_loc_info_present_flag);
 303     if (current->chroma_loc_info_present_flag) {
 304         ue(chroma_sample_loc_type_top_field,    0, 5);
 305         ue(chroma_sample_loc_type_bottom_field, 0, 5);
 306     } else {
 307         infer(chroma_sample_loc_type_top_field,    0);
 308         infer(chroma_sample_loc_type_bottom_field, 0);
 309     }
 310
 311     flag(neutral_chroma_indication_flag);
 312     flag(field_seq_flag);
 313     flag(frame_field_info_present_flag);
 314
 315     flag(default_display_window_flag);
 316     if (current->default_display_window_flag) {
 317         ue(def_disp_win_left_offset,   0, 16384);
 318         ue(def_disp_win_right_offset,  0, 16384);
 319         ue(def_disp_win_top_offset,    0, 16384);
 320         ue(def_disp_win_bottom_offset, 0, 16384);
 321     }
 322
 323     flag(vui_timing_info_present_flag);
 324     if (current->vui_timing_info_present_flag) {
 325         u(32, vui_num_units_in_tick, 1, UINT32_MAX);
 326         u(32, vui_time_scale,        1, UINT32_MAX);
 327         flag(vui_poc_proportional_to_timing_flag);
 328         if (current->vui_poc_proportional_to_timing_flag)
 329             ue(vui_num_ticks_poc_diff_one_minus1, 0, UINT32_MAX - 1);
 330
 331         flag(vui_hrd_parameters_present_flag);
 332         if (current->vui_hrd_parameters_present_flag) {
 333             CHECK(FUNC(hrd_parameters)(ctx, rw, &current->hrd_parameters,
 334                                        1, sps->sps_max_sub_layers_minus1));
 335         }
 336     }
 337
 338     flag(bitstream_restriction_flag);
 339     if (current->bitstream_restriction_flag) {
 340         flag(tiles_fixed_structure_flag);
 341         flag(motion_vectors_over_pic_boundaries_flag);
 342         flag(restricted_ref_pic_lists_flag);
 343         ue(min_spatial_segmentation_idc,  0, 4095);
 344         ue(max_bytes_per_pic_denom,       0, 16);
 345         ue(max_bits_per_min_cu_denom,     0, 16);
 346         ue(log2_max_mv_length_horizontal, 0, 16);
 347         ue(log2_max_mv_length_vertical,   0, 16);
 348     } else {
 349         infer(tiles_fixed_structure_flag,    0);
 350         infer(motion_vectors_over_pic_boundaries_flag, 1);
 351         infer(min_spatial_segmentation_idc,  0);
 352         infer(max_bytes_per_pic_denom,       2);
 353         infer(max_bits_per_min_cu_denom,     1);
 354         infer(log2_max_mv_length_horizontal, 15);
 355         infer(log2_max_mv_length_vertical,   15);
 356     }
 357
 358     return 0;
 359 }
 360
 361 static int FUNC(vps)(CodedBitstreamContext *ctx, RWContext *rw,
 362                      H265RawVPS *current)
 363 {
 364     int err, i, j;
 365
 366     HEADER("Video Parameter Set");
 367
 368     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_VPS));
 369
 370     u(4, vps_video_parameter_set_id, 0, 15);
 371
 372     flag(vps_base_layer_internal_flag);
 373     flag(vps_base_layer_available_flag);
 374     u(6, vps_max_layers_minus1,     0, HEVC_MAX_LAYERS - 1);
 375     u(3, vps_max_sub_layers_minus1, 0, HEVC_MAX_SUB_LAYERS - 1);
 376     flag(vps_temporal_id_nesting_flag);
 377
 378     if (current->vps_max_sub_layers_minus1 == 0 &&
 379         current->vps_temporal_id_nesting_flag != 1) {
 380         av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "
 381                "vps_temporal_id_nesting_flag must be 1 if "
 382                "vps_max_sub_layers_minus1 is 0.\n");
 383         return AVERROR_INVALIDDATA;
 384     }
 385
 386     fixed(16, vps_reserved_0xffff_16bits, 0xffff);
 387
 388     CHECK(FUNC(profile_tier_level)(ctx, rw, &current->profile_tier_level,
 389                                    1, current->vps_max_sub_layers_minus1));
 390
 391     flag(vps_sub_layer_ordering_info_present_flag);
 392     for (i = (current->vps_sub_layer_ordering_info_present_flag ?
 393               0 : current->vps_max_sub_layers_minus1);
 394          i <= current->vps_max_sub_layers_minus1; i++) {
 395         ues(vps_max_dec_pic_buffering_minus1[i],
 396             0, HEVC_MAX_DPB_SIZE - 1,                        1, i);
 397         ues(vps_max_num_reorder_pics[i],
 398             0, current->vps_max_dec_pic_buffering_minus1[i], 1, i);
 399         ues(vps_max_latency_increase_plus1[i],
 400             0, UINT32_MAX - 1,                               1, i);
 401     }
 402     if (!current->vps_sub_layer_ordering_info_present_flag) {
 403         for (i = 0; i < current->vps_max_sub_layers_minus1; i++) {
 404             infer(vps_max_dec_pic_buffering_minus1[i],
 405                   current->vps_max_dec_pic_buffering_minus1[current->vps_max_sub_layers_minus1]);
 406             infer(vps_max_num_reorder_pics[i],
 407                   current->vps_max_num_reorder_pics[current->vps_max_sub_layers_minus1]);
 408             infer(vps_max_latency_increase_plus1[i],
 409                   current->vps_max_latency_increase_plus1[current->vps_max_sub_layers_minus1]);
 410         }
 411     }
 412
 413     u(6, vps_max_layer_id,        0, HEVC_MAX_LAYERS - 1);
 414     ue(vps_num_layer_sets_minus1, 0, HEVC_MAX_LAYER_SETS - 1);
 415     for (i = 1; i <= current->vps_num_layer_sets_minus1; i++) {
 416         for (j = 0; j <= current->vps_max_layer_id; j++)
 417             flags(layer_id_included_flag[i][j], 2, i, j);
 418     }
 419     for (j = 0; j <= current->vps_max_layer_id; j++)
 420         infer(layer_id_included_flag[0][j], j == 0);
 421
 422     flag(vps_timing_info_present_flag);
 423     if (current->vps_timing_info_present_flag) {
 424         u(32, vps_num_units_in_tick, 1, UINT32_MAX);
 425         u(32, vps_time_scale,        1, UINT32_MAX);
 426         flag(vps_poc_proportional_to_timing_flag);
 427         if (current->vps_poc_proportional_to_timing_flag)
 428             ue(vps_num_ticks_poc_diff_one_minus1, 0, UINT32_MAX - 1);
 429         ue(vps_num_hrd_parameters, 0, current->vps_num_layer_sets_minus1 + 1);
 430         for (i = 0; i < current->vps_num_hrd_parameters; i++) {
 431             ues(hrd_layer_set_idx[i],
 432                 current->vps_base_layer_internal_flag ? 0 : 1,
 433                 current->vps_num_layer_sets_minus1, 1, i);
 434             if (i > 0)
 435                 flags(cprms_present_flag[i], 1, i);
 436             else
 437                 infer(cprms_present_flag[0], 1);
 438
 439             CHECK(FUNC(hrd_parameters)(ctx, rw, &current->hrd_parameters[i],
 440                                        current->cprms_present_flag[i],
 441                                        current->vps_max_sub_layers_minus1));
 442         }
 443     }
 444
 445     flag(vps_extension_flag);
 446     if (current->vps_extension_flag)
 447         CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));
 448
 449     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
 450
 451     return 0;
 452 }
 453
 454 static int FUNC(st_ref_pic_set)(CodedBitstreamContext *ctx, RWContext *rw,
 455                                 H265RawSTRefPicSet *current, int st_rps_idx,
 456                                 const H265RawSPS *sps)
 457 {
 458     int err, i, j;
 459
 460     if (st_rps_idx != 0)
 461         flag(inter_ref_pic_set_prediction_flag);
 462     else
 463         infer(inter_ref_pic_set_prediction_flag, 0);
 464
 465     if (current->inter_ref_pic_set_prediction_flag) {
 466         unsigned int ref_rps_idx, num_delta_pocs;
 467         const H265RawSTRefPicSet *ref;
 468         int delta_rps, d_poc;
 469         int ref_delta_poc_s0[HEVC_MAX_REFS], ref_delta_poc_s1[HEVC_MAX_REFS];
 470         int delta_poc_s0[HEVC_MAX_REFS], delta_poc_s1[HEVC_MAX_REFS];
 471         uint8_t used_by_curr_pic_s0[HEVC_MAX_REFS],
 472                 used_by_curr_pic_s1[HEVC_MAX_REFS];
 473
 474         if (st_rps_idx == sps->num_short_term_ref_pic_sets)
 475             ue(delta_idx_minus1, 0, st_rps_idx - 1);
 476         else
 477             infer(delta_idx_minus1, 0);
 478
 479         ref_rps_idx = st_rps_idx - (current->delta_idx_minus1 + 1);
 480         ref = &sps->st_ref_pic_set[ref_rps_idx];
 481         num_delta_pocs = ref->num_negative_pics + ref->num_positive_pics;
 482
 483         flag(delta_rps_sign);
 484         ue(abs_delta_rps_minus1, 0, INT16_MAX);
 485         delta_rps = (1 - 2 * current->delta_rps_sign) *
 486             (current->abs_delta_rps_minus1 + 1);
 487
 488         for (j = 0; j <= num_delta_pocs; j++) {
 489             flags(used_by_curr_pic_flag[j], 1, j);
 490             if (!current->used_by_curr_pic_flag[j])
 491                 flags(use_delta_flag[j], 1, j);
 492             else
 493                 infer(use_delta_flag[j], 1);
 494         }
 495
 496         // Since the stored form of an RPS here is actually the delta-step
 497         // form used when inter_ref_pic_set_prediction_flag is not set, we
 498         // need to reconstruct that here in order to be able to refer to
 499         // the RPS later (which is required for parsing, because we don't
 500         // even know what syntax elements appear without it).  Therefore,
 501         // this code takes the delta-step form of the reference set, turns
 502         // it into the delta-array form, applies the prediction process of
 503         // 7.4.8, converts the result back to the delta-step form, and
 504         // stores that as the current set for future use.  Note that the
 505         // inferences here mean that writers using prediction will need
 506         // to fill in the delta-step values correctly as well - since the
 507         // whole RPS prediction process is somewhat overly sophisticated,
 508         // this hopefully forms a useful check for them to ensure their
 509         // predicted form actually matches what was intended rather than
 510         // an onerous additional requirement.
 511
 512         d_poc = 0;
 513         for (i = 0; i < ref->num_negative_pics; i++) {
 514             d_poc -= ref->delta_poc_s0_minus1[i] + 1;
 515             ref_delta_poc_s0[i] = d_poc;
 516         }
 517         d_poc = 0;
 518         for (i = 0; i < ref->num_positive_pics; i++) {
 519             d_poc += ref->delta_poc_s1_minus1[i] + 1;
 520             ref_delta_poc_s1[i] = d_poc;
 521         }
 522
 523         i = 0;
 524         for (j = ref->num_positive_pics - 1; j >= 0; j--) {
 525             d_poc = ref_delta_poc_s1[j] + delta_rps;
 526             if (d_poc < 0 && current->use_delta_flag[ref->num_negative_pics + j]) {
 527                 delta_poc_s0[i] = d_poc;
 528                 used_by_curr_pic_s0[i++] =
 529                     current->used_by_curr_pic_flag[ref->num_negative_pics + j];
 530             }
 531         }
 532         if (delta_rps < 0 && current->use_delta_flag[num_delta_pocs]) {
 533             delta_poc_s0[i] = delta_rps;
 534             used_by_curr_pic_s0[i++] =
 535                 current->used_by_curr_pic_flag[num_delta_pocs];
 536         }
 537         for (j = 0; j < ref->num_negative_pics; j++) {
 538             d_poc = ref_delta_poc_s0[j] + delta_rps;
 539             if (d_poc < 0 && current->use_delta_flag[j]) {
 540                 delta_poc_s0[i] = d_poc;
 541                 used_by_curr_pic_s0[i++] = current->used_by_curr_pic_flag[j];
 542             }
 543         }
 544
 545         infer(num_negative_pics, i);
 546         for (i = 0; i < current->num_negative_pics; i++) {
 547             infer(delta_poc_s0_minus1[i],
 548                   -(delta_poc_s0[i] - (i == 0 ? 0 : delta_poc_s0[i - 1])) - 1);
 549             infer(used_by_curr_pic_s0_flag[i], used_by_curr_pic_s0[i]);
 550         }
 551
 552         i = 0;
 553         for (j = ref->num_negative_pics - 1; j >= 0; j--) {
 554             d_poc = ref_delta_poc_s0[j] + delta_rps;
 555             if (d_poc > 0 && current->use_delta_flag[j]) {
 556                 delta_poc_s1[i] = d_poc;
 557                 used_by_curr_pic_s1[i++] = current->used_by_curr_pic_flag[j];
 558             }
 559         }
 560         if (delta_rps > 0 && current->use_delta_flag[num_delta_pocs]) {
 561             delta_poc_s1[i] = delta_rps;
 562             used_by_curr_pic_s1[i++] =
 563                 current->used_by_curr_pic_flag[num_delta_pocs];
 564         }
 565         for (j = 0; j < ref->num_positive_pics; j++) {
 566             d_poc = ref_delta_poc_s1[j] + delta_rps;
 567             if (d_poc > 0 && current->use_delta_flag[ref->num_negative_pics + j]) {
 568                 delta_poc_s1[i] = d_poc;
 569                 used_by_curr_pic_s1[i++] =
 570                     current->used_by_curr_pic_flag[ref->num_negative_pics + j];
 571             }
 572         }
 573
 574         infer(num_positive_pics, i);
 575         for (i = 0; i < current->num_positive_pics; i++) {
 576             infer(delta_poc_s1_minus1[i],
 577                   delta_poc_s1[i] - (i == 0 ? 0 : delta_poc_s1[i - 1]) - 1);
 578             infer(used_by_curr_pic_s1_flag[i], used_by_curr_pic_s1[i]);
 579         }
 580
 581     } else {
 582         ue(num_negative_pics, 0, 15);
 583         ue(num_positive_pics, 0, 15 - current->num_negative_pics);
 584
 585         for (i = 0; i < current->num_negative_pics; i++) {
 586             ues(delta_poc_s0_minus1[i], 0, INT16_MAX, 1, i);
 587             flags(used_by_curr_pic_s0_flag[i],        1, i);
 588         }
 589
 590         for (i = 0; i < current->num_positive_pics; i++) {
 591             ues(delta_poc_s1_minus1[i], 0, INT16_MAX, 1, i);
 592             flags(used_by_curr_pic_s1_flag[i],        1, i);
 593         }
 594     }
 595
 596     return 0;
 597 }
 598
 599 static int FUNC(scaling_list_data)(CodedBitstreamContext *ctx, RWContext *rw,
 600                                    H265RawScalingList *current)
 601 {
 602     int sizeId, matrixId;
 603     int err, n, i;
 604
 605     for (sizeId = 0; sizeId < 4; sizeId++) {
 606         for (matrixId = 0; matrixId < 6; matrixId += (sizeId == 3 ? 3 : 1)) {
 607             flags(scaling_list_pred_mode_flag[sizeId][matrixId],
 608                   2, sizeId, matrixId);
 609             if (!current->scaling_list_pred_mode_flag[sizeId][matrixId]) {
 610                 ues(scaling_list_pred_matrix_id_delta[sizeId][matrixId],
 611                     0, sizeId == 3 ? matrixId / 3 : matrixId,
 612                     2, sizeId, matrixId);
 613             } else {
 614                 n = FFMIN(64, 1 << (4 + (sizeId << 1)));
 615                 if (sizeId > 1) {
 616                     ses(scaling_list_dc_coef_minus8[sizeId - 2][matrixId], -7, +247,
 617                         2, sizeId - 2, matrixId);
 618                 }
 619                 for (i = 0; i < n; i++) {
 620                     ses(scaling_list_delta_coeff[sizeId][matrixId][i],
 621                         -128, +127, 3, sizeId, matrixId, i);
 622                 }
 623             }
 624         }
 625     }
 626
 627     return 0;
 628 }
 629
 630 static int FUNC(sps_range_extension)(CodedBitstreamContext *ctx, RWContext *rw,
 631                                      H265RawSPS *current)
 632 {
 633     int err;
 634
 635     flag(transform_skip_rotation_enabled_flag);
 636     flag(transform_skip_context_enabled_flag);
 637     flag(implicit_rdpcm_enabled_flag);
 638     flag(explicit_rdpcm_enabled_flag);
 639     flag(extended_precision_processing_flag);
 640     flag(intra_smoothing_disabled_flag);
 641     flag(high_precision_offsets_enabled_flag);
 642     flag(persistent_rice_adaptation_enabled_flag);
 643     flag(cabac_bypass_alignment_enabled_flag);
 644
 645     return 0;
 646 }
 647
 648 static int FUNC(sps_scc_extension)(CodedBitstreamContext *ctx, RWContext *rw,
 649                                    H265RawSPS *current)
 650 {
 651     int err, comp, i;
 652
 653     flag(sps_curr_pic_ref_enabled_flag);
 654
 655     flag(palette_mode_enabled_flag);
 656     if (current->palette_mode_enabled_flag) {
 657         ue(palette_max_size, 0, 64);
 658         ue(delta_palette_max_predictor_size, 0, 128);
 659
 660         flag(sps_palette_predictor_initializer_present_flag);
 661         if (current->sps_palette_predictor_initializer_present_flag) {
 662             ue(sps_num_palette_predictor_initializer_minus1, 0, 128);
 663             for (comp = 0; comp < (current->chroma_format_idc ? 3 : 1); comp++) {
 664                 int bit_depth = comp == 0 ? current->bit_depth_luma_minus8 + 8
 665                                           : current->bit_depth_chroma_minus8 + 8;
 666                 for (i = 0; i <= current->sps_num_palette_predictor_initializer_minus1; i++)
 667                     us(bit_depth, sps_palette_predictor_initializers[comp][i],
 668                        0, MAX_UINT_BITS(bit_depth), 2, comp, i);
 669             }
 670         }
 671     }
 672
 673     u(2, motion_vector_resolution_control_idc, 0, 2);
 674     flag(intra_boundary_filtering_disable_flag);
 675
 676     return 0;
 677 }
 678
 679 static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
 680                      H265RawSPS *current)
 681 {
 682     CodedBitstreamH265Context *h265 = ctx->priv_data;
 683     const H265RawVPS *vps;
 684     int err, i;
 685     unsigned int min_cb_log2_size_y, ctb_log2_size_y,
 686                  min_cb_size_y,   min_tb_log2_size_y;
 687
 688     HEADER("Sequence Parameter Set");
 689
 690     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_SPS));
 691
 692     u(4, sps_video_parameter_set_id, 0, 15);
 693     h265->active_vps = vps = h265->vps[current->sps_video_parameter_set_id];
 694
 695     u(3, sps_max_sub_layers_minus1, 0, HEVC_MAX_SUB_LAYERS - 1);
 696     flag(sps_temporal_id_nesting_flag);
 697     if (vps) {
 698         if (vps->vps_max_sub_layers_minus1 > current->sps_max_sub_layers_minus1) {
 699             av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "
 700                    "sps_max_sub_layers_minus1 (%d) must be less than or equal to "
 701                    "vps_max_sub_layers_minus1 (%d).\n",
 702                    vps->vps_max_sub_layers_minus1,
 703                    current->sps_max_sub_layers_minus1);
 704             return AVERROR_INVALIDDATA;
 705         }
 706         if (vps->vps_temporal_id_nesting_flag &&
 707             !current->sps_temporal_id_nesting_flag) {
 708             av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "
 709                    "sps_temporal_id_nesting_flag must be 1 if "
 710                    "vps_temporal_id_nesting_flag is 1.\n");
 711             return AVERROR_INVALIDDATA;
 712         }
 713     }
 714
 715     CHECK(FUNC(profile_tier_level)(ctx, rw, &current->profile_tier_level,
 716                                    1, current->sps_max_sub_layers_minus1));
 717
 718     ue(sps_seq_parameter_set_id, 0, 15);
 719
 720     ue(chroma_format_idc, 0, 3);
 721     if (current->chroma_format_idc == 3)
 722         flag(separate_colour_plane_flag);
 723     else
 724         infer(separate_colour_plane_flag, 0);
 725
 726     ue(pic_width_in_luma_samples,  1, HEVC_MAX_WIDTH);
 727     ue(pic_height_in_luma_samples, 1, HEVC_MAX_HEIGHT);
 728
 729     flag(conformance_window_flag);
 730     if (current->conformance_window_flag) {
 731         ue(conf_win_left_offset,   0, current->pic_width_in_luma_samples);
 732         ue(conf_win_right_offset,  0, current->pic_width_in_luma_samples);
 733         ue(conf_win_top_offset,    0, current->pic_height_in_luma_samples);
 734         ue(conf_win_bottom_offset, 0, current->pic_height_in_luma_samples);
 735     } else {
 736         infer(conf_win_left_offset,   0);
 737         infer(conf_win_right_offset,  0);
 738         infer(conf_win_top_offset,    0);
 739         infer(conf_win_bottom_offset, 0);
 740     }
 741
 742     ue(bit_depth_luma_minus8,   0, 8);
 743     ue(bit_depth_chroma_minus8, 0, 8);
 744
 745     ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12);
 746
 747     flag(sps_sub_layer_ordering_info_present_flag);
 748     for (i = (current->sps_sub_layer_ordering_info_present_flag ?
 749               0 : current->sps_max_sub_layers_minus1);
 750          i <= current->sps_max_sub_layers_minus1; i++) {
 751         ues(sps_max_dec_pic_buffering_minus1[i],
 752             0, HEVC_MAX_DPB_SIZE - 1,                        1, i);
 753         ues(sps_max_num_reorder_pics[i],
 754             0, current->sps_max_dec_pic_buffering_minus1[i], 1, i);
 755         ues(sps_max_latency_increase_plus1[i],
 756             0, UINT32_MAX - 1,                               1, i);
 757     }
 758     if (!current->sps_sub_layer_ordering_info_present_flag) {
 759         for (i = 0; i < current->sps_max_sub_layers_minus1; i++) {
 760             infer(sps_max_dec_pic_buffering_minus1[i],
 761                   current->sps_max_dec_pic_buffering_minus1[current->sps_max_sub_layers_minus1]);
 762             infer(sps_max_num_reorder_pics[i],
 763                   current->sps_max_num_reorder_pics[current->sps_max_sub_layers_minus1]);
 764             infer(sps_max_latency_increase_plus1[i],
 765                   current->sps_max_latency_increase_plus1[current->sps_max_sub_layers_minus1]);
 766         }
 767     }
 768
 769     ue(log2_min_luma_coding_block_size_minus3,   0, 3);
 770     min_cb_log2_size_y = current->log2_min_luma_coding_block_size_minus3 + 3;
 771
 772     ue(log2_diff_max_min_luma_coding_block_size, 0, 3);
 773     ctb_log2_size_y = min_cb_log2_size_y +
 774         current->log2_diff_max_min_luma_coding_block_size;
 775
 776     min_cb_size_y = 1 << min_cb_log2_size_y;
 777     if (current->pic_width_in_luma_samples  % min_cb_size_y ||
 778         current->pic_height_in_luma_samples % min_cb_size_y) {
 779         av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid dimensions: %ux%u not divisible "
 780                "by MinCbSizeY = %u.\n", current->pic_width_in_luma_samples,
 781                current->pic_height_in_luma_samples, min_cb_size_y);
 782         return AVERROR_INVALIDDATA;
 783     }
 784
 785     ue(log2_min_luma_transform_block_size_minus2, 0, min_cb_log2_size_y - 3);
 786     min_tb_log2_size_y = current->log2_min_luma_transform_block_size_minus2 + 2;
 787
 788     ue(log2_diff_max_min_luma_transform_block_size,
 789        0, FFMIN(ctb_log2_size_y, 5) - min_tb_log2_size_y);
 790
 791     ue(max_transform_hierarchy_depth_inter,
 792        0, ctb_log2_size_y - min_tb_log2_size_y);
 793     ue(max_transform_hierarchy_depth_intra,
 794        0, ctb_log2_size_y - min_tb_log2_size_y);
 795
 796     flag(scaling_list_enabled_flag);
 797     if (current->scaling_list_enabled_flag) {
 798         flag(sps_scaling_list_data_present_flag);
 799         if (current->sps_scaling_list_data_present_flag)
 800             CHECK(FUNC(scaling_list_data)(ctx, rw, &current->scaling_list));
 801     } else {
 802         infer(sps_scaling_list_data_present_flag, 0);
 803     }
 804
 805     flag(amp_enabled_flag);
 806     flag(sample_adaptive_offset_enabled_flag);
 807
 808     flag(pcm_enabled_flag);
 809     if (current->pcm_enabled_flag) {
 810         u(4, pcm_sample_bit_depth_luma_minus1,
 811           0, current->bit_depth_luma_minus8 + 8 - 1);
 812         u(4, pcm_sample_bit_depth_chroma_minus1,
 813           0, current->bit_depth_chroma_minus8 + 8 - 1);
 814
 815         ue(log2_min_pcm_luma_coding_block_size_minus3,
 816            FFMIN(min_cb_log2_size_y, 5) - 3, FFMIN(ctb_log2_size_y, 5) - 3);
 817         ue(log2_diff_max_min_pcm_luma_coding_block_size,
 818            0, FFMIN(ctb_log2_size_y, 5) - (current->log2_min_pcm_luma_coding_block_size_minus3 + 3));
 819
 820         flag(pcm_loop_filter_disabled_flag);
 821     }
 822
 823     ue(num_short_term_ref_pic_sets, 0, HEVC_MAX_SHORT_TERM_REF_PIC_SETS);
 824     for (i = 0; i < current->num_short_term_ref_pic_sets; i++)
 825         CHECK(FUNC(st_ref_pic_set)(ctx, rw, &current->st_ref_pic_set[i], i, current));
 826
 827     flag(long_term_ref_pics_present_flag);
 828     if (current->long_term_ref_pics_present_flag) {
 829         ue(num_long_term_ref_pics_sps, 0, HEVC_MAX_LONG_TERM_REF_PICS);
 830         for (i = 0; i < current->num_long_term_ref_pics_sps; i++) {
 831             us(current->log2_max_pic_order_cnt_lsb_minus4 + 4,
 832                lt_ref_pic_poc_lsb_sps[i],
 833                0, MAX_UINT_BITS(current->log2_max_pic_order_cnt_lsb_minus4 + 4), 1, i);
 834             flags(used_by_curr_pic_lt_sps_flag[i], 1, i);
 835         }
 836     }
 837
 838     flag(sps_temporal_mvp_enabled_flag);
 839     flag(strong_intra_smoothing_enabled_flag);
 840
 841     flag(vui_parameters_present_flag);
 842     if (current->vui_parameters_present_flag)
 843         CHECK(FUNC(vui_parameters)(ctx, rw, &current->vui, current));
 844
 845     flag(sps_extension_present_flag);
 846     if (current->sps_extension_present_flag) {
 847         flag(sps_range_extension_flag);
 848         flag(sps_multilayer_extension_flag);
 849         flag(sps_3d_extension_flag);
 850         flag(sps_scc_extension_flag);
 851         u(4, sps_extension_4bits, 0, MAX_UINT_BITS(4));
 852     }
 853
 854     if (current->sps_range_extension_flag)
 855         CHECK(FUNC(sps_range_extension)(ctx, rw, current));
 856     if (current->sps_multilayer_extension_flag)
 857         return AVERROR_PATCHWELCOME;
 858     if (current->sps_3d_extension_flag)
 859         return AVERROR_PATCHWELCOME;
 860     if (current->sps_scc_extension_flag)
 861         CHECK(FUNC(sps_scc_extension)(ctx, rw, current));
 862     if (current->sps_extension_4bits)
 863         CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));
 864
 865     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
 866
 867     return 0;
 868 }
 869
 870 static int FUNC(pps_range_extension)(CodedBitstreamContext *ctx, RWContext *rw,
 871                                      H265RawPPS *current)
 872 {
 873     CodedBitstreamH265Context *h265 = ctx->priv_data;
 874     const H265RawSPS *sps = h265->active_sps;
 875     int err, i;
 876
 877     if (current->transform_skip_enabled_flag)
 878         ue(log2_max_transform_skip_block_size_minus2, 0, 3);
 879     flag(cross_component_prediction_enabled_flag);
 880
 881     flag(chroma_qp_offset_list_enabled_flag);
 882     if (current->chroma_qp_offset_list_enabled_flag) {
 883         ue(diff_cu_chroma_qp_offset_depth,
 884            0, sps->log2_diff_max_min_luma_coding_block_size);
 885         ue(chroma_qp_offset_list_len_minus1, 0, 5);
 886         for (i = 0; i <= current->chroma_qp_offset_list_len_minus1; i++) {
 887             ses(cb_qp_offset_list[i], -12, +12, 1, i);
 888             ses(cr_qp_offset_list[i], -12, +12, 1, i);
 889         }
 890     }
 891
 892     ue(log2_sao_offset_scale_luma,   0, FFMAX(0, sps->bit_depth_luma_minus8   - 2));
 893     ue(log2_sao_offset_scale_chroma, 0, FFMAX(0, sps->bit_depth_chroma_minus8 - 2));
 894
 895     return 0;
 896 }
 897
 898 static int FUNC(pps_scc_extension)(CodedBitstreamContext *ctx, RWContext *rw,
 899                                    H265RawPPS *current)
 900 {
 901     int err, comp, i;
 902
 903     flag(pps_curr_pic_ref_enabled_flag);
 904
 905     flag(residual_adaptive_colour_transform_enabled_flag);
 906     if (current->residual_adaptive_colour_transform_enabled_flag) {
 907         flag(pps_slice_act_qp_offsets_present_flag);
 908         se(pps_act_y_qp_offset_plus5,  -7, +17);
 909         se(pps_act_cb_qp_offset_plus5, -7, +17);
 910         se(pps_act_cr_qp_offset_plus3, -9, +15);
 911     } else {
 912         infer(pps_slice_act_qp_offsets_present_flag, 0);
 913         infer(pps_act_y_qp_offset_plus5,  0);
 914         infer(pps_act_cb_qp_offset_plus5, 0);
 915         infer(pps_act_cr_qp_offset_plus3, 0);
 916     }
 917
 918     flag(pps_palette_predictor_initializer_present_flag);
 919     if (current->pps_palette_predictor_initializer_present_flag) {
 920         ue(pps_num_palette_predictor_initializer, 0, 128);
 921         if (current->pps_num_palette_predictor_initializer > 0) {
 922             flag(monochrome_palette_flag);
 923             ue(luma_bit_depth_entry_minus8, 0, 8);
 924             if (!current->monochrome_palette_flag)
 925                 ue(chroma_bit_depth_entry_minus8, 0, 8);
 926             for (comp = 0; comp < (current->monochrome_palette_flag ? 1 : 3); comp++) {
 927                 int bit_depth = comp == 0 ? current->luma_bit_depth_entry_minus8 + 8
 928                                           : current->chroma_bit_depth_entry_minus8 + 8;
 929                 for (i = 0; i < current->pps_num_palette_predictor_initializer; i++)
 930                     us(bit_depth, pps_palette_predictor_initializers[comp][i],
 931                        0, MAX_UINT_BITS(bit_depth), 2, comp, i);
 932             }
 933         }
 934     }
 935
 936     return 0;
 937 }
 938
 939 static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw,
 940                      H265RawPPS *current)
 941 {
 942     CodedBitstreamH265Context *h265 = ctx->priv_data;
 943     const H265RawSPS *sps;
 944     int err, i;
 945
 946     HEADER("Picture Parameter Set");
 947
 948     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_PPS));
 949
 950     ue(pps_pic_parameter_set_id, 0, 63);
 951     ue(pps_seq_parameter_set_id, 0, 15);
 952     sps = h265->sps[current->pps_seq_parameter_set_id];
 953     if (!sps) {
 954         av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
 955                current->pps_seq_parameter_set_id);
 956         return AVERROR_INVALIDDATA;
 957     }
 958     h265->active_sps = sps;
 959
 960     flag(dependent_slice_segments_enabled_flag);
 961     flag(output_flag_present_flag);
 962     u(3, num_extra_slice_header_bits, 0, 7);
 963     flag(sign_data_hiding_enabled_flag);
 964     flag(cabac_init_present_flag);
 965
 966     ue(num_ref_idx_l0_default_active_minus1, 0, 14);
 967     ue(num_ref_idx_l1_default_active_minus1, 0, 14);
 968
 969     se(init_qp_minus26, -(26 + 6 * sps->bit_depth_luma_minus8), +25);
 970
 971     flag(constrained_intra_pred_flag);
 972     flag(transform_skip_enabled_flag);
 973     flag(cu_qp_delta_enabled_flag);
 974     if (current->cu_qp_delta_enabled_flag)
 975         ue(diff_cu_qp_delta_depth,
 976            0, sps->log2_diff_max_min_luma_coding_block_size);
 977     else
 978         infer(diff_cu_qp_delta_depth, 0);
 979
 980     se(pps_cb_qp_offset, -12, +12);
 981     se(pps_cr_qp_offset, -12, +12);
 982     flag(pps_slice_chroma_qp_offsets_present_flag);
 983
 984     flag(weighted_pred_flag);
 985     flag(weighted_bipred_flag);
 986
 987     flag(transquant_bypass_enabled_flag);
 988     flag(tiles_enabled_flag);
 989     flag(entropy_coding_sync_enabled_flag);
 990
 991     if (current->tiles_enabled_flag) {
 992         ue(num_tile_columns_minus1, 0, HEVC_MAX_TILE_COLUMNS);
 993         ue(num_tile_rows_minus1,    0, HEVC_MAX_TILE_ROWS);
 994         flag(uniform_spacing_flag);
 995         if (!current->uniform_spacing_flag) {
 996             for (i = 0; i < current->num_tile_columns_minus1; i++)
 997                 ues(column_width_minus1[i], 0, sps->pic_width_in_luma_samples,  1, i);
 998             for (i = 0; i < current->num_tile_rows_minus1; i++)
 999                 ues(row_height_minus1[i],   0, sps->pic_height_in_luma_samples, 1, i);
1000         }
1001         flag(loop_filter_across_tiles_enabled_flag);
1002     } else {
1003         infer(num_tile_columns_minus1, 0);
1004         infer(num_tile_rows_minus1,    0);
1005     }
1006
1007     flag(pps_loop_filter_across_slices_enabled_flag);
1008     flag(deblocking_filter_control_present_flag);
1009     if (current->deblocking_filter_control_present_flag) {
1010         flag(deblocking_filter_override_enabled_flag);
1011         flag(pps_deblocking_filter_disabled_flag);
1012         if (!current->pps_deblocking_filter_disabled_flag) {
1013             se(pps_beta_offset_div2, -6, +6);
1014             se(pps_tc_offset_div2,   -6, +6);
1015         } else {
1016             infer(pps_beta_offset_div2, 0);
1017             infer(pps_tc_offset_div2,   0);
1018         }
1019     } else {
1020         infer(deblocking_filter_override_enabled_flag, 0);
1021         infer(pps_deblocking_filter_disabled_flag,     0);
1022         infer(pps_beta_offset_div2, 0);
1023         infer(pps_tc_offset_div2,   0);
1024     }
1025
1026     flag(pps_scaling_list_data_present_flag);
1027     if (current->pps_scaling_list_data_present_flag)
1028         CHECK(FUNC(scaling_list_data)(ctx, rw, &current->scaling_list));
1029
1030     flag(lists_modification_present_flag);
1031
1032     ue(log2_parallel_merge_level_minus2,
1033        0, (sps->log2_min_luma_coding_block_size_minus3 + 3 +
1034            sps->log2_diff_max_min_luma_coding_block_size - 2));
1035
1036     flag(slice_segment_header_extension_present_flag);
1037
1038     flag(pps_extension_present_flag);
1039     if (current->pps_extension_present_flag) {
1040         flag(pps_range_extension_flag);
1041         flag(pps_multilayer_extension_flag);
1042         flag(pps_3d_extension_flag);
1043         flag(pps_scc_extension_flag);
1044         u(4, pps_extension_4bits, 0, MAX_UINT_BITS(4));
1045     }
1046     if (current->pps_range_extension_flag)
1047         CHECK(FUNC(pps_range_extension)(ctx, rw, current));
1048     if (current->pps_multilayer_extension_flag)
1049         return AVERROR_PATCHWELCOME;
1050     if (current->pps_3d_extension_flag)
1051         return AVERROR_PATCHWELCOME;
1052     if (current->pps_scc_extension_flag)
1053         CHECK(FUNC(pps_scc_extension)(ctx, rw, current));
1054     if (current->pps_extension_4bits)
1055         CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));
1056
1057     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
1058
1059     return 0;
1060 }
1061
1062 static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,
1063                      H265RawAUD *current)
1064 {
1065     int err;
1066
1067     HEADER("Access Unit Delimiter");
1068
1069     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_AUD));
1070
1071     u(3, pic_type, 0, 2);
1072
1073     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
1074
1075     return 0;
1076 }
1077
1078 static int FUNC(ref_pic_lists_modification)(CodedBitstreamContext *ctx, RWContext *rw,
1079                                             H265RawSliceHeader *current,
1080                                             unsigned int num_pic_total_curr)
1081 {
1082     unsigned int entry_size;
1083     int err, i;
1084
1085     entry_size = av_log2(num_pic_total_curr - 1) + 1;
1086
1087     flag(ref_pic_list_modification_flag_l0);
1088     if (current->ref_pic_list_modification_flag_l0) {
1089         for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++)
1090             us(entry_size, list_entry_l0[i], 0, num_pic_total_curr - 1, 1, i);
1091     }
1092
1093     if (current->slice_type == HEVC_SLICE_B) {
1094         flag(ref_pic_list_modification_flag_l1);
1095         if (current->ref_pic_list_modification_flag_l1) {
1096             for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++)
1097                 us(entry_size, list_entry_l1[i], 0, num_pic_total_curr - 1, 1, i);
1098         }
1099     }
1100
1101     return 0;
1102 }
1103
1104 static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,
1105                                    H265RawSliceHeader *current)
1106 {
1107     CodedBitstreamH265Context *h265 = ctx->priv_data;
1108     const H265RawSPS *sps = h265->active_sps;
1109     int err, i, j;
1110     int chroma = !sps->separate_colour_plane_flag &&
1111                   sps->chroma_format_idc != 0;
1112
1113     ue(luma_log2_weight_denom, 0, 7);
1114     if (chroma)
1115         se(delta_chroma_log2_weight_denom, -7, 7);
1116     else
1117         infer(delta_chroma_log2_weight_denom, 0);
1118
1119     for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
1120         if (1 /* is not same POC and same layer_id */)
1121             flags(luma_weight_l0_flag[i], 1, i);
1122         else
1123             infer(luma_weight_l0_flag[i], 0);
1124     }
1125     if (chroma) {
1126         for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
1127             if (1 /* is not same POC and same layer_id */)
1128                 flags(chroma_weight_l0_flag[i], 1, i);
1129             else
1130                 infer(chroma_weight_l0_flag[i], 0);
1131         }
1132     }
1133
1134     for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
1135         if (current->luma_weight_l0_flag[i]) {
1136             ses(delta_luma_weight_l0[i], -128, +127, 1, i);
1137             ses(luma_offset_l0[i],
1138                 -(1 << (sps->bit_depth_luma_minus8 + 8 - 1)),
1139                 ((1 << (sps->bit_depth_luma_minus8 + 8 - 1)) - 1), 1, i);
1140         } else {
1141             infer(delta_luma_weight_l0[i], 0);
1142             infer(luma_offset_l0[i],       0);
1143         }
1144         if (current->chroma_weight_l0_flag[i]) {
1145             for (j = 0; j < 2; j++) {
1146                 ses(delta_chroma_weight_l0[i][j], -128, +127, 2, i, j);
1147                 ses(chroma_offset_l0[i][j],
1148                     -(4 << (sps->bit_depth_chroma_minus8 + 8 - 1)),
1149                     ((4 << (sps->bit_depth_chroma_minus8 + 8 - 1)) - 1), 2, i, j);
1150             }
1151         } else {
1152             for (j = 0; j < 2; j++) {
1153                 infer(delta_chroma_weight_l0[i][j], 0);
1154                 infer(chroma_offset_l0[i][j],       0);
1155             }
1156         }
1157     }
1158
1159     if (current->slice_type == HEVC_SLICE_B) {
1160         for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
1161             if (1 /* RefPicList1[i] is not CurrPic, nor is it in a different layer */)
1162                 flags(luma_weight_l1_flag[i], 1, i);
1163             else
1164                 infer(luma_weight_l1_flag[i], 0);
1165         }
1166         if (chroma) {
1167             for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
1168                 if (1 /* RefPicList1[i] is not CurrPic, nor is it in a different layer */)
1169                     flags(chroma_weight_l1_flag[i], 1, i);
1170                 else
1171                     infer(chroma_weight_l1_flag[i], 0);
1172             }
1173         }
1174
1175         for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
1176             if (current->luma_weight_l1_flag[i]) {
1177                 ses(delta_luma_weight_l1[i], -128, +127, 1, i);
1178                 ses(luma_offset_l1[i],
1179                     -(1 << (sps->bit_depth_luma_minus8 + 8 - 1)),
1180                     ((1 << (sps->bit_depth_luma_minus8 + 8 - 1)) - 1), 1, i);
1181             } else {
1182                 infer(delta_luma_weight_l1[i], 0);
1183                 infer(luma_offset_l1[i],       0);
1184             }
1185             if (current->chroma_weight_l1_flag[i]) {
1186                 for (j = 0; j < 2; j++) {
1187                     ses(delta_chroma_weight_l1[i][j], -128, +127, 2, i, j);
1188                     ses(chroma_offset_l1[i][j],
1189                         -(4 << (sps->bit_depth_chroma_minus8 + 8 - 1)),
1190                         ((4 << (sps->bit_depth_chroma_minus8 + 8 - 1)) - 1), 2, i, j);
1191                 }
1192             } else {
1193                 for (j = 0; j < 2; j++) {
1194                     infer(delta_chroma_weight_l1[i][j], 0);
1195                     infer(chroma_offset_l1[i][j],       0);
1196                 }
1197             }
1198         }
1199     }
1200
1201     return 0;
1202 }
1203
1204 static int FUNC(slice_segment_header)(CodedBitstreamContext *ctx, RWContext *rw,
1205                                       H265RawSliceHeader *current)
1206 {
1207     CodedBitstreamH265Context *h265 = ctx->priv_data;
1208     const H265RawSPS *sps;
1209     const H265RawPPS *pps;
1210     unsigned int min_cb_log2_size_y, ctb_log2_size_y, ctb_size_y;
1211     unsigned int pic_width_in_ctbs_y, pic_height_in_ctbs_y, pic_size_in_ctbs_y;
1212     unsigned int num_pic_total_curr = 0;
1213     int err, i;
1214
1215     HEADER("Slice Segment Header");
1216
1217     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, -1));
1218
1219     flag(first_slice_segment_in_pic_flag);
1220
1221     if (current->nal_unit_header.nal_unit_type >= HEVC_NAL_BLA_W_LP &&
1222         current->nal_unit_header.nal_unit_type <= HEVC_NAL_IRAP_VCL23)
1223         flag(no_output_of_prior_pics_flag);
1224
1225     ue(slice_pic_parameter_set_id, 0, 63);
1226
1227     pps = h265->pps[current->slice_pic_parameter_set_id];
1228     if (!pps) {
1229         av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",
1230                current->slice_pic_parameter_set_id);
1231         return AVERROR_INVALIDDATA;
1232     }
1233     h265->active_pps = pps;
1234
1235     sps = h265->sps[pps->pps_seq_parameter_set_id];
1236     if (!sps) {
1237         av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
1238                pps->pps_seq_parameter_set_id);
1239         return AVERROR_INVALIDDATA;
1240     }
1241     h265->active_sps = sps;
1242
1243     min_cb_log2_size_y = sps->log2_min_luma_coding_block_size_minus3 + 3;
1244     ctb_log2_size_y = min_cb_log2_size_y + sps->log2_diff_max_min_luma_coding_block_size;
1245     ctb_size_y = 1 << ctb_log2_size_y;
1246     pic_width_in_ctbs_y =
1247         (sps->pic_width_in_luma_samples + ctb_size_y - 1) / ctb_size_y;
1248     pic_height_in_ctbs_y =
1249         (sps->pic_height_in_luma_samples + ctb_size_y - 1) / ctb_size_y;
1250     pic_size_in_ctbs_y = pic_width_in_ctbs_y * pic_height_in_ctbs_y;
1251
1252     if (!current->first_slice_segment_in_pic_flag) {
1253         unsigned int address_size = av_log2(pic_size_in_ctbs_y - 1) + 1;
1254         if (pps->dependent_slice_segments_enabled_flag)
1255             flag(dependent_slice_segment_flag);
1256         else
1257             infer(dependent_slice_segment_flag, 0);
1258         u(address_size, slice_segment_address, 0, pic_size_in_ctbs_y - 1);
1259     } else {
1260         infer(dependent_slice_segment_flag, 0);
1261     }
1262
1263     if (!current->dependent_slice_segment_flag) {
1264         for (i = 0; i < pps->num_extra_slice_header_bits; i++)
1265             flags(slice_reserved_flag[i], 1, i);
1266
1267         ue(slice_type, 0, 2);
1268
1269         if (pps->output_flag_present_flag)
1270             flag(pic_output_flag);
1271
1272         if (sps->separate_colour_plane_flag)
1273             u(2, colour_plane_id, 0, 2);
1274
1275         if (current->nal_unit_header.nal_unit_type != HEVC_NAL_IDR_W_RADL &&
1276             current->nal_unit_header.nal_unit_type != HEVC_NAL_IDR_N_LP) {
1277             const H265RawSTRefPicSet *rps;
1278
1279             u(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, slice_pic_order_cnt_lsb,
1280               0, MAX_UINT_BITS(sps->log2_max_pic_order_cnt_lsb_minus4 + 4));
1281
1282             flag(short_term_ref_pic_set_sps_flag);
1283             if (!current->short_term_ref_pic_set_sps_flag) {
1284                 CHECK(FUNC(st_ref_pic_set)(ctx, rw, &current->short_term_ref_pic_set,
1285                                            sps->num_short_term_ref_pic_sets, sps));
1286                 rps = &current->short_term_ref_pic_set;
1287             } else if (sps->num_short_term_ref_pic_sets > 1) {
1288                 unsigned int idx_size = av_log2(sps->num_short_term_ref_pic_sets - 1) + 1;
1289                 u(idx_size, short_term_ref_pic_set_idx,
1290                   0, sps->num_short_term_ref_pic_sets - 1);
1291                 rps = &sps->st_ref_pic_set[current->short_term_ref_pic_set_idx];
1292             } else {
1293                 infer(short_term_ref_pic_set_idx, 0);
1294                 rps = &sps->st_ref_pic_set[0];
1295             }
1296
1297             num_pic_total_curr = 0;
1298             for (i = 0; i < rps->num_negative_pics; i++)
1299                 if (rps->used_by_curr_pic_s0_flag[i])
1300                     ++num_pic_total_curr;
1301             for (i = 0; i < rps->num_positive_pics; i++)
1302                 if (rps->used_by_curr_pic_s1_flag[i])
1303                     ++num_pic_total_curr;
1304
1305             if (sps->long_term_ref_pics_present_flag) {
1306                 unsigned int idx_size;
1307
1308                 if (sps->num_long_term_ref_pics_sps > 0) {
1309                     ue(num_long_term_sps, 0, sps->num_long_term_ref_pics_sps);
1310                     idx_size = av_log2(sps->num_long_term_ref_pics_sps - 1) + 1;
1311                 } else {
1312                     infer(num_long_term_sps, 0);
1313                     idx_size = 0;
1314                 }
1315                 ue(num_long_term_pics, 0, HEVC_MAX_LONG_TERM_REF_PICS);
1316
1317                 for (i = 0; i < current->num_long_term_sps +
1318                                 current->num_long_term_pics; i++) {
1319                     if (i < current->num_long_term_sps) {
1320                         if (sps->num_long_term_ref_pics_sps > 1)
1321                             us(idx_size, lt_idx_sps[i],
1322                                0, sps->num_long_term_ref_pics_sps - 1, 1, i);
1323                         if (sps->used_by_curr_pic_lt_sps_flag[current->lt_idx_sps[i]])
1324                             ++num_pic_total_curr;
1325                     } else {
1326                         us(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, poc_lsb_lt[i],
1327                            0, MAX_UINT_BITS(sps->log2_max_pic_order_cnt_lsb_minus4 + 4), 1, i);
1328                         flags(used_by_curr_pic_lt_flag[i], 1, i);
1329                         if (current->used_by_curr_pic_lt_flag[i])
1330                             ++num_pic_total_curr;
1331                     }
1332                     flags(delta_poc_msb_present_flag[i], 1, i);
1333                     if (current->delta_poc_msb_present_flag[i])
1334                         ues(delta_poc_msb_cycle_lt[i], 0, UINT32_MAX - 1, 1, i);
1335                     else
1336                         infer(delta_poc_msb_cycle_lt[i], 0);
1337                 }
1338             }
1339
1340             if (sps->sps_temporal_mvp_enabled_flag)
1341                 flag(slice_temporal_mvp_enabled_flag);
1342             else
1343                 infer(slice_temporal_mvp_enabled_flag, 0);
1344
1345             if (pps->pps_curr_pic_ref_enabled_flag)
1346                 ++num_pic_total_curr;
1347         }
1348
1349         if (sps->sample_adaptive_offset_enabled_flag) {
1350             flag(slice_sao_luma_flag);
1351             if (!sps->separate_colour_plane_flag && sps->chroma_format_idc != 0)
1352                 flag(slice_sao_chroma_flag);
1353             else
1354                 infer(slice_sao_chroma_flag, 0);
1355         } else {
1356             infer(slice_sao_luma_flag,   0);
1357             infer(slice_sao_chroma_flag, 0);
1358         }
1359
1360         if (current->slice_type == HEVC_SLICE_P ||
1361             current->slice_type == HEVC_SLICE_B) {
1362             flag(num_ref_idx_active_override_flag);
1363             if (current->num_ref_idx_active_override_flag) {
1364                 ue(num_ref_idx_l0_active_minus1, 0, 14);
1365                 if (current->slice_type == HEVC_SLICE_B)
1366                     ue(num_ref_idx_l1_active_minus1, 0, 14);
1367                 else
1368                     infer(num_ref_idx_l1_active_minus1, pps->num_ref_idx_l1_default_active_minus1);
1369             } else {
1370                 infer(num_ref_idx_l0_active_minus1, pps->num_ref_idx_l0_default_active_minus1);
1371                 infer(num_ref_idx_l1_active_minus1, pps->num_ref_idx_l1_default_active_minus1);
1372             }
1373
1374             if (pps->lists_modification_present_flag && num_pic_total_curr > 1)
1375                 CHECK(FUNC(ref_pic_lists_modification)(ctx, rw, current,
1376                                                        num_pic_total_curr));
1377
1378             if (current->slice_type == HEVC_SLICE_B)
1379                 flag(mvd_l1_zero_flag);
1380             if (pps->cabac_init_present_flag)
1381                 flag(cabac_init_flag);
1382             else
1383                 infer(cabac_init_flag, 0);
1384             if (current->slice_temporal_mvp_enabled_flag) {
1385                 if (current->slice_type == HEVC_SLICE_B)
1386                     flag(collocated_from_l0_flag);
1387                 else
1388                     infer(collocated_from_l0_flag, 1);
1389                 if (current->collocated_from_l0_flag) {
1390                     if (current->num_ref_idx_l0_active_minus1 > 0)
1391                         ue(collocated_ref_idx, 0, current->num_ref_idx_l0_active_minus1);
1392                     else
1393                         infer(collocated_ref_idx, 0);
1394                 } else {
1395                     if (current->num_ref_idx_l1_active_minus1 > 0)
1396                         ue(collocated_ref_idx, 0, current->num_ref_idx_l1_active_minus1);
1397                     else
1398                         infer(collocated_ref_idx, 0);
1399                 }
1400             }
1401
1402             if ((pps->weighted_pred_flag   && current->slice_type == HEVC_SLICE_P) ||
1403                 (pps->weighted_bipred_flag && current->slice_type == HEVC_SLICE_B))
1404                 CHECK(FUNC(pred_weight_table)(ctx, rw, current));
1405
1406             ue(five_minus_max_num_merge_cand, 0, 4);
1407             if (sps->motion_vector_resolution_control_idc == 2)
1408                 flag(use_integer_mv_flag);
1409             else
1410                 infer(use_integer_mv_flag, sps->motion_vector_resolution_control_idc);
1411         }
1412
1413         se(slice_qp_delta,
1414            - 6 * sps->bit_depth_luma_minus8 - (pps->init_qp_minus26 + 26),
1415            + 51 - (pps->init_qp_minus26 + 26));
1416         if (pps->pps_slice_chroma_qp_offsets_present_flag) {
1417             se(slice_cb_qp_offset, -12, +12);
1418             se(slice_cr_qp_offset, -12, +12);
1419         } else {
1420             infer(slice_cb_qp_offset, 0);
1421             infer(slice_cr_qp_offset, 0);
1422         }
1423         if (pps->pps_slice_act_qp_offsets_present_flag) {
1424             se(slice_act_y_qp_offset,
1425                -12 - (pps->pps_act_y_qp_offset_plus5 - 5),
1426                +12 - (pps->pps_act_y_qp_offset_plus5 - 5));
1427             se(slice_act_cb_qp_offset,
1428                -12 - (pps->pps_act_cb_qp_offset_plus5 - 5),
1429                +12 - (pps->pps_act_cb_qp_offset_plus5 - 5));
1430             se(slice_act_cr_qp_offset,
1431                -12 - (pps->pps_act_cr_qp_offset_plus3 - 3),
1432                +12 - (pps->pps_act_cr_qp_offset_plus3 - 3));
1433         } else {
1434             infer(slice_act_y_qp_offset,  0);
1435             infer(slice_act_cb_qp_offset, 0);
1436             infer(slice_act_cr_qp_offset, 0);
1437         }
1438         if (pps->chroma_qp_offset_list_enabled_flag)
1439             flag(cu_chroma_qp_offset_enabled_flag);
1440         else
1441             infer(cu_chroma_qp_offset_enabled_flag, 0);
1442
1443         if (pps->deblocking_filter_override_enabled_flag)
1444             flag(deblocking_filter_override_flag);
1445         else
1446             infer(deblocking_filter_override_flag, 0);
1447         if (current->deblocking_filter_override_flag) {
1448             flag(slice_deblocking_filter_disabled_flag);
1449             if (!current->slice_deblocking_filter_disabled_flag) {
1450                 se(slice_beta_offset_div2, -6, +6);
1451                 se(slice_tc_offset_div2,   -6, +6);
1452             } else {
1453                 infer(slice_beta_offset_div2, pps->pps_beta_offset_div2);
1454                 infer(slice_tc_offset_div2,   pps->pps_tc_offset_div2);
1455             }
1456         } else {
1457             infer(slice_deblocking_filter_disabled_flag,
1458                   pps->pps_deblocking_filter_disabled_flag);
1459             infer(slice_beta_offset_div2, pps->pps_beta_offset_div2);
1460             infer(slice_tc_offset_div2,   pps->pps_tc_offset_div2);
1461         }
1462         if (pps->pps_loop_filter_across_slices_enabled_flag &&
1463             (current->slice_sao_luma_flag || current->slice_sao_chroma_flag ||
1464              !current->slice_deblocking_filter_disabled_flag))
1465             flag(slice_loop_filter_across_slices_enabled_flag);
1466         else
1467             infer(slice_loop_filter_across_slices_enabled_flag,
1468                   pps->pps_loop_filter_across_slices_enabled_flag);
1469     }
1470
1471     if (pps->tiles_enabled_flag || pps->entropy_coding_sync_enabled_flag) {
1472         unsigned int num_entry_point_offsets_limit;
1473         if (!pps->tiles_enabled_flag && pps->entropy_coding_sync_enabled_flag)
1474             num_entry_point_offsets_limit = pic_height_in_ctbs_y - 1;
1475         else if (pps->tiles_enabled_flag && !pps->entropy_coding_sync_enabled_flag)
1476             num_entry_point_offsets_limit =
1477                 (pps->num_tile_columns_minus1 + 1) * (pps->num_tile_rows_minus1 + 1);
1478         else
1479             num_entry_point_offsets_limit =
1480                 (pps->num_tile_columns_minus1 + 1) * pic_height_in_ctbs_y - 1;
1481         ue(num_entry_point_offsets, 0, num_entry_point_offsets_limit);
1482
1483         if (current->num_entry_point_offsets > HEVC_MAX_ENTRY_POINT_OFFSETS) {
1484             av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many entry points: "
1485                    "%"PRIu16".\n", current->num_entry_point_offsets);
1486             return AVERROR_PATCHWELCOME;
1487         }
1488
1489         if (current->num_entry_point_offsets > 0) {
1490             ue(offset_len_minus1, 0, 31);
1491             for (i = 0; i < current->num_entry_point_offsets; i++)
1492                 us(current->offset_len_minus1 + 1, entry_point_offset_minus1[i],
1493                    0, MAX_UINT_BITS(current->offset_len_minus1 + 1), 1, i);
1494         }
1495     }
1496
1497     if (pps->slice_segment_header_extension_present_flag) {
1498         ue(slice_segment_header_extension_length, 0, 256);
1499         for (i = 0; i < current->slice_segment_header_extension_length; i++)
1500             us(8, slice_segment_header_extension_data_byte[i], 0x00, 0xff, 1, i);
1501     }
1502
1503     CHECK(FUNC(byte_alignment)(ctx, rw));
1504
1505     return 0;
1506 }
1507
1508 static int FUNC(sei_mastering_display)(CodedBitstreamContext *ctx, RWContext *rw,
1509                                        H265RawSEIMasteringDisplayColourVolume *current)
1510 {
1511     int err, c;
1512
1513     for (c = 0; c < 3; c++) {
1514         us(16, display_primaries_x[c], 0, 50000, 1, c);
1515         us(16, display_primaries_y[c], 0, 50000, 1, c);
1516     }
1517
1518     u(16, white_point_x, 0, 50000);
1519     u(16, white_point_y, 0, 50000);
1520
1521     u(32, max_display_mastering_luminance,
1522       1, MAX_UINT_BITS(32));
1523     u(32, min_display_mastering_luminance,
1524       0, current->max_display_mastering_luminance - 1);
1525
1526     return 0;
1527 }
1528
1529 static int FUNC(sei_content_light_level)(CodedBitstreamContext *ctx, RWContext *rw,
1530                                          H265RawSEIContentLightLevelInfo *current)
1531 {
1532     int err;
1533
1534     u(16, max_content_light_level, 0, MAX_UINT_BITS(16));
1535     u(16, max_pic_average_light_level, 0, MAX_UINT_BITS(16));
1536
1537     return 0;
1538 }
1539
1540 static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,
1541                              H265RawSEIPayload *current)
1542 {
1543     int err, i;
1544     int start_position, end_position;
1545
1546 #ifdef READ
1547     start_position = get_bits_count(rw);
1548 #else
1549     start_position = put_bits_count(rw);
1550 #endif
1551
1552     switch (current->payload_type) {
1553     case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
1554         CHECK(FUNC(sei_mastering_display)
1555               (ctx, rw, &current->payload.mastering_display));
1556
1557         break;
1558
1559     case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
1560         CHECK(FUNC(sei_content_light_level)
1561               (ctx, rw, &current->payload.content_light_level));
1562
1563         break;
1564
1565     default:
1566         {
1567 #ifdef READ
1568             current->payload.other.data_length = current->payload_size;
1569 #endif
1570             allocate(current->payload.other.data, current->payload.other.data_length);
1571
1572             for (i = 0; i < current->payload_size; i++)
1573                 xu(8, payload_byte[i], current->payload.other.data[i], 0, 255,
1574                    1, i);
1575         }
1576     }
1577
1578     if (byte_alignment(rw)) {
1579         fixed(1, bit_equal_to_one, 1);
1580         while (byte_alignment(rw))
1581             fixed(1, bit_equal_to_zero, 0);
1582     }
1583
1584 #ifdef READ
1585     end_position = get_bits_count(rw);
1586     if (end_position < start_position + 8 * current->payload_size) {
1587         av_log(ctx->log_ctx, AV_LOG_ERROR, "Incorrect SEI payload length: "
1588                "header %"PRIu32" bits, actually %d bits.\n",
1589                8 * current->payload_size,
1590                end_position - start_position);
1591         return AVERROR_INVALIDDATA;
1592     }
1593 #else
1594     end_position = put_bits_count(rw);
1595     current->payload_size = (end_position - start_position) >> 3;
1596 #endif
1597
1598     return 0;
1599 }
1600
1601 static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
1602                      H265RawSEI *current)
1603 {
1604     int err, k;
1605
1606     HEADER("Supplemental Enhancement Information");
1607
1608     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
1609                                 HEVC_NAL_SEI_PREFIX));
1610
1611 #ifdef READ
1612     for (k = 0; k < H265_MAX_SEI_PAYLOADS; k++) {
1613         uint32_t payload_type = 0;
1614         uint32_t payload_size = 0;
1615         uint32_t tmp;
1616
1617         while (show_bits(rw, 8) == 0xff) {
1618             fixed(8, ff_byte, 0xff);
1619             payload_type += 255;
1620         }
1621         xu(8, last_payload_type_byte, tmp, 0, 254, 0);
1622         payload_type += tmp;
1623
1624         while (show_bits(rw, 8) == 0xff) {
1625             fixed(8, ff_byte, 0xff);
1626             payload_size += 255;
1627         }
1628         xu(8, last_payload_size_byte, tmp, 0, 254, 0);
1629         payload_size += tmp;
1630
1631         current->payload[k].payload_type = payload_type;
1632         current->payload[k].payload_size = payload_size;
1633
1634         CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k]));
1635
1636         if (!cbs_h2645_read_more_rbsp_data(rw))
1637             break;
1638     }
1639     if (k >= H265_MAX_SEI_PAYLOADS) {
1640         av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many payloads in "
1641                "SEI message: found %d.\n", k);
1642         return AVERROR_INVALIDDATA;
1643     }
1644     current->payload_count = k + 1;
1645 #else
1646     for (k = 0; k < current->payload_count; k++) {
1647         PutBitContext start_state;
1648         uint32_t tmp;
1649         int need_size, i;
1650
1651         // Somewhat clumsy: we write the payload twice when
1652         // we don't know the size in advance.  This will mess
1653         // with trace output, but is otherwise harmless.
1654         start_state = *rw;
1655         need_size = !current->payload[k].payload_size;
1656         for (i = 0; i < 1 + need_size; i++) {
1657             *rw = start_state;
1658
1659             tmp = current->payload[k].payload_type;
1660             while (tmp >= 255) {
1661                 fixed(8, ff_byte, 0xff);
1662                 tmp -= 255;
1663             }
1664             xu(8, last_payload_type_byte, tmp, 0, 254, 0);
1665
1666             tmp = current->payload[k].payload_size;
1667             while (tmp >= 255) {
1668                 fixed(8, ff_byte, 0xff);
1669                 tmp -= 255;
1670             }
1671             xu(8, last_payload_size_byte, tmp, 0, 254, 0);
1672
1673             CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k]));
1674         }
1675     }
1676 #endif
1677
1678     CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
1679
1680     return 0;
1681 }