| 1 | /* |
| 2 | * Copyright (c) 2014 Tim Walker <tdskywalker@gmail.com> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include "libavcodec/get_bits.h" |
| 22 | #include "libavcodec/golomb.h" |
| 23 | #include "libavcodec/hevc.h" |
| 24 | #include "libavutil/intreadwrite.h" |
| 25 | #include "avc.h" |
| 26 | #include "avio.h" |
| 27 | #include "hevc.h" |
| 28 | |
| 29 | #define MAX_SPATIAL_SEGMENTATION 4096 // max. value of u(12) field |
| 30 | |
| 31 | typedef struct HVCCNALUnitArray { |
| 32 | uint8_t array_completeness; |
| 33 | uint8_t NAL_unit_type; |
| 34 | uint16_t numNalus; |
| 35 | uint16_t *nalUnitLength; |
| 36 | uint8_t **nalUnit; |
| 37 | } HVCCNALUnitArray; |
| 38 | |
| 39 | typedef struct HEVCDecoderConfigurationRecord { |
| 40 | uint8_t configurationVersion; |
| 41 | uint8_t general_profile_space; |
| 42 | uint8_t general_tier_flag; |
| 43 | uint8_t general_profile_idc; |
| 44 | uint32_t general_profile_compatibility_flags; |
| 45 | uint64_t general_constraint_indicator_flags; |
| 46 | uint8_t general_level_idc; |
| 47 | uint16_t min_spatial_segmentation_idc; |
| 48 | uint8_t parallelismType; |
| 49 | uint8_t chromaFormat; |
| 50 | uint8_t bitDepthLumaMinus8; |
| 51 | uint8_t bitDepthChromaMinus8; |
| 52 | uint16_t avgFrameRate; |
| 53 | uint8_t constantFrameRate; |
| 54 | uint8_t numTemporalLayers; |
| 55 | uint8_t temporalIdNested; |
| 56 | uint8_t lengthSizeMinusOne; |
| 57 | uint8_t numOfArrays; |
| 58 | HVCCNALUnitArray *array; |
| 59 | } HEVCDecoderConfigurationRecord; |
| 60 | |
| 61 | typedef struct HVCCProfileTierLevel { |
| 62 | uint8_t profile_space; |
| 63 | uint8_t tier_flag; |
| 64 | uint8_t profile_idc; |
| 65 | uint32_t profile_compatibility_flags; |
| 66 | uint64_t constraint_indicator_flags; |
| 67 | uint8_t level_idc; |
| 68 | } HVCCProfileTierLevel; |
| 69 | |
| 70 | static void hvcc_update_ptl(HEVCDecoderConfigurationRecord *hvcc, |
| 71 | HVCCProfileTierLevel *ptl) |
| 72 | { |
| 73 | /* |
| 74 | * The value of general_profile_space in all the parameter sets must be |
| 75 | * identical. |
| 76 | */ |
| 77 | hvcc->general_profile_space = ptl->profile_space; |
| 78 | |
| 79 | /* |
| 80 | * The level indication general_level_idc must indicate a level of |
| 81 | * capability equal to or greater than the highest level indicated for the |
| 82 | * highest tier in all the parameter sets. |
| 83 | */ |
| 84 | if (hvcc->general_tier_flag < ptl->tier_flag) |
| 85 | hvcc->general_level_idc = ptl->level_idc; |
| 86 | else |
| 87 | hvcc->general_level_idc = FFMAX(hvcc->general_level_idc, ptl->level_idc); |
| 88 | |
| 89 | /* |
| 90 | * The tier indication general_tier_flag must indicate a tier equal to or |
| 91 | * greater than the highest tier indicated in all the parameter sets. |
| 92 | */ |
| 93 | hvcc->general_tier_flag = FFMAX(hvcc->general_tier_flag, ptl->tier_flag); |
| 94 | |
| 95 | /* |
| 96 | * The profile indication general_profile_idc must indicate a profile to |
| 97 | * which the stream associated with this configuration record conforms. |
| 98 | * |
| 99 | * If the sequence parameter sets are marked with different profiles, then |
| 100 | * the stream may need examination to determine which profile, if any, the |
| 101 | * entire stream conforms to. If the entire stream is not examined, or the |
| 102 | * examination reveals that there is no profile to which the entire stream |
| 103 | * conforms, then the entire stream must be split into two or more |
| 104 | * sub-streams with separate configuration records in which these rules can |
| 105 | * be met. |
| 106 | * |
| 107 | * Note: set the profile to the highest value for the sake of simplicity. |
| 108 | */ |
| 109 | hvcc->general_profile_idc = FFMAX(hvcc->general_profile_idc, ptl->profile_idc); |
| 110 | |
| 111 | /* |
| 112 | * Each bit in general_profile_compatibility_flags may only be set if all |
| 113 | * the parameter sets set that bit. |
| 114 | */ |
| 115 | hvcc->general_profile_compatibility_flags &= ptl->profile_compatibility_flags; |
| 116 | |
| 117 | /* |
| 118 | * Each bit in general_constraint_indicator_flags may only be set if all |
| 119 | * the parameter sets set that bit. |
| 120 | */ |
| 121 | hvcc->general_constraint_indicator_flags &= ptl->constraint_indicator_flags; |
| 122 | } |
| 123 | |
| 124 | static void hvcc_parse_ptl(GetBitContext *gb, |
| 125 | HEVCDecoderConfigurationRecord *hvcc, |
| 126 | unsigned int max_sub_layers_minus1) |
| 127 | { |
| 128 | unsigned int i; |
| 129 | HVCCProfileTierLevel general_ptl; |
| 130 | uint8_t sub_layer_profile_present_flag[MAX_SUB_LAYERS]; |
| 131 | uint8_t sub_layer_level_present_flag[MAX_SUB_LAYERS]; |
| 132 | |
| 133 | general_ptl.profile_space = get_bits(gb, 2); |
| 134 | general_ptl.tier_flag = get_bits1(gb); |
| 135 | general_ptl.profile_idc = get_bits(gb, 5); |
| 136 | general_ptl.profile_compatibility_flags = get_bits_long(gb, 32); |
| 137 | general_ptl.constraint_indicator_flags = get_bits64(gb, 48); |
| 138 | general_ptl.level_idc = get_bits(gb, 8); |
| 139 | hvcc_update_ptl(hvcc, &general_ptl); |
| 140 | |
| 141 | for (i = 0; i < max_sub_layers_minus1; i++) { |
| 142 | sub_layer_profile_present_flag[i] = get_bits1(gb); |
| 143 | sub_layer_level_present_flag[i] = get_bits1(gb); |
| 144 | } |
| 145 | |
| 146 | if (max_sub_layers_minus1 > 0) |
| 147 | for (i = max_sub_layers_minus1; i < 8; i++) |
| 148 | skip_bits(gb, 2); // reserved_zero_2bits[i] |
| 149 | |
| 150 | for (i = 0; i < max_sub_layers_minus1; i++) { |
| 151 | if (sub_layer_profile_present_flag[i]) { |
| 152 | /* |
| 153 | * sub_layer_profile_space[i] u(2) |
| 154 | * sub_layer_tier_flag[i] u(1) |
| 155 | * sub_layer_profile_idc[i] u(5) |
| 156 | * sub_layer_profile_compatibility_flag[i][0..31] u(32) |
| 157 | * sub_layer_progressive_source_flag[i] u(1) |
| 158 | * sub_layer_interlaced_source_flag[i] u(1) |
| 159 | * sub_layer_non_packed_constraint_flag[i] u(1) |
| 160 | * sub_layer_frame_only_constraint_flag[i] u(1) |
| 161 | * sub_layer_reserved_zero_44bits[i] u(44) |
| 162 | */ |
| 163 | skip_bits_long(gb, 32); |
| 164 | skip_bits_long(gb, 32); |
| 165 | skip_bits (gb, 24); |
| 166 | } |
| 167 | |
| 168 | if (sub_layer_level_present_flag[i]) |
| 169 | skip_bits(gb, 8); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | static void skip_sub_layer_hrd_parameters(GetBitContext *gb, |
| 174 | unsigned int cpb_cnt_minus1, |
| 175 | uint8_t sub_pic_hrd_params_present_flag) |
| 176 | { |
| 177 | unsigned int i; |
| 178 | |
| 179 | for (i = 0; i <= cpb_cnt_minus1; i++) { |
| 180 | get_ue_golomb_long(gb); // bit_rate_value_minus1 |
| 181 | get_ue_golomb_long(gb); // cpb_size_value_minus1 |
| 182 | |
| 183 | if (sub_pic_hrd_params_present_flag) { |
| 184 | get_ue_golomb_long(gb); // cpb_size_du_value_minus1 |
| 185 | get_ue_golomb_long(gb); // bit_rate_du_value_minus1 |
| 186 | } |
| 187 | |
| 188 | skip_bits1(gb); // cbr_flag |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | static void skip_hrd_parameters(GetBitContext *gb, uint8_t cprms_present_flag, |
| 193 | unsigned int max_sub_layers_minus1) |
| 194 | { |
| 195 | unsigned int i; |
| 196 | uint8_t sub_pic_hrd_params_present_flag = 0; |
| 197 | uint8_t nal_hrd_parameters_present_flag = 0; |
| 198 | uint8_t vcl_hrd_parameters_present_flag = 0; |
| 199 | |
| 200 | if (cprms_present_flag) { |
| 201 | nal_hrd_parameters_present_flag = get_bits1(gb); |
| 202 | vcl_hrd_parameters_present_flag = get_bits1(gb); |
| 203 | |
| 204 | if (nal_hrd_parameters_present_flag || |
| 205 | vcl_hrd_parameters_present_flag) { |
| 206 | sub_pic_hrd_params_present_flag = get_bits1(gb); |
| 207 | |
| 208 | if (sub_pic_hrd_params_present_flag) |
| 209 | /* |
| 210 | * tick_divisor_minus2 u(8) |
| 211 | * du_cpb_removal_delay_increment_length_minus1 u(5) |
| 212 | * sub_pic_cpb_params_in_pic_timing_sei_flag u(1) |
| 213 | * dpb_output_delay_du_length_minus1 u(5) |
| 214 | */ |
| 215 | skip_bits(gb, 19); |
| 216 | |
| 217 | /* |
| 218 | * bit_rate_scale u(4) |
| 219 | * cpb_size_scale u(4) |
| 220 | */ |
| 221 | skip_bits(gb, 8); |
| 222 | |
| 223 | if (sub_pic_hrd_params_present_flag) |
| 224 | skip_bits(gb, 4); // cpb_size_du_scale |
| 225 | |
| 226 | /* |
| 227 | * initial_cpb_removal_delay_length_minus1 u(5) |
| 228 | * au_cpb_removal_delay_length_minus1 u(5) |
| 229 | * dpb_output_delay_length_minus1 u(5) |
| 230 | */ |
| 231 | skip_bits(gb, 15); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | for (i = 0; i <= max_sub_layers_minus1; i++) { |
| 236 | unsigned int cpb_cnt_minus1 = 0; |
| 237 | uint8_t low_delay_hrd_flag = 0; |
| 238 | uint8_t fixed_pic_rate_within_cvs_flag = 0; |
| 239 | uint8_t fixed_pic_rate_general_flag = get_bits1(gb); |
| 240 | |
| 241 | if (!fixed_pic_rate_general_flag) |
| 242 | fixed_pic_rate_within_cvs_flag = get_bits1(gb); |
| 243 | |
| 244 | if (fixed_pic_rate_within_cvs_flag) |
| 245 | get_ue_golomb_long(gb); // elemental_duration_in_tc_minus1 |
| 246 | else |
| 247 | low_delay_hrd_flag = get_bits1(gb); |
| 248 | |
| 249 | if (!low_delay_hrd_flag) |
| 250 | cpb_cnt_minus1 = get_ue_golomb_long(gb); |
| 251 | |
| 252 | if (nal_hrd_parameters_present_flag) |
| 253 | skip_sub_layer_hrd_parameters(gb, cpb_cnt_minus1, |
| 254 | sub_pic_hrd_params_present_flag); |
| 255 | |
| 256 | if (vcl_hrd_parameters_present_flag) |
| 257 | skip_sub_layer_hrd_parameters(gb, cpb_cnt_minus1, |
| 258 | sub_pic_hrd_params_present_flag); |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | static void skip_timing_info(GetBitContext *gb) |
| 263 | { |
| 264 | skip_bits_long(gb, 32); // num_units_in_tick |
| 265 | skip_bits_long(gb, 32); // time_scale |
| 266 | |
| 267 | if (get_bits1(gb)) // poc_proportional_to_timing_flag |
| 268 | get_ue_golomb_long(gb); // num_ticks_poc_diff_one_minus1 |
| 269 | } |
| 270 | |
| 271 | static void hvcc_parse_vui(GetBitContext *gb, |
| 272 | HEVCDecoderConfigurationRecord *hvcc, |
| 273 | unsigned int max_sub_layers_minus1) |
| 274 | { |
| 275 | unsigned int min_spatial_segmentation_idc; |
| 276 | |
| 277 | if (get_bits1(gb)) // aspect_ratio_info_present_flag |
| 278 | if (get_bits(gb, 8) == 255) // aspect_ratio_idc |
| 279 | skip_bits_long(gb, 32); // sar_width u(16), sar_height u(16) |
| 280 | |
| 281 | if (get_bits1(gb)) // overscan_info_present_flag |
| 282 | skip_bits1(gb); // overscan_appropriate_flag |
| 283 | |
| 284 | if (get_bits1(gb)) { // video_signal_type_present_flag |
| 285 | skip_bits(gb, 4); // video_format u(3), video_full_range_flag u(1) |
| 286 | |
| 287 | if (get_bits1(gb)) // colour_description_present_flag |
| 288 | /* |
| 289 | * colour_primaries u(8) |
| 290 | * transfer_characteristics u(8) |
| 291 | * matrix_coeffs u(8) |
| 292 | */ |
| 293 | skip_bits(gb, 24); |
| 294 | } |
| 295 | |
| 296 | if (get_bits1(gb)) { // chroma_loc_info_present_flag |
| 297 | get_ue_golomb_long(gb); // chroma_sample_loc_type_top_field |
| 298 | get_ue_golomb_long(gb); // chroma_sample_loc_type_bottom_field |
| 299 | } |
| 300 | |
| 301 | /* |
| 302 | * neutral_chroma_indication_flag u(1) |
| 303 | * field_seq_flag u(1) |
| 304 | * frame_field_info_present_flag u(1) |
| 305 | */ |
| 306 | skip_bits(gb, 3); |
| 307 | |
| 308 | if (get_bits1(gb)) { // default_display_window_flag |
| 309 | get_ue_golomb_long(gb); // def_disp_win_left_offset |
| 310 | get_ue_golomb_long(gb); // def_disp_win_right_offset |
| 311 | get_ue_golomb_long(gb); // def_disp_win_top_offset |
| 312 | get_ue_golomb_long(gb); // def_disp_win_bottom_offset |
| 313 | } |
| 314 | |
| 315 | if (get_bits1(gb)) { // vui_timing_info_present_flag |
| 316 | skip_timing_info(gb); |
| 317 | |
| 318 | if (get_bits1(gb)) // vui_hrd_parameters_present_flag |
| 319 | skip_hrd_parameters(gb, 1, max_sub_layers_minus1); |
| 320 | } |
| 321 | |
| 322 | if (get_bits1(gb)) { // bitstream_restriction_flag |
| 323 | /* |
| 324 | * tiles_fixed_structure_flag u(1) |
| 325 | * motion_vectors_over_pic_boundaries_flag u(1) |
| 326 | * restricted_ref_pic_lists_flag u(1) |
| 327 | */ |
| 328 | skip_bits(gb, 3); |
| 329 | |
| 330 | min_spatial_segmentation_idc = get_ue_golomb_long(gb); |
| 331 | |
| 332 | /* |
| 333 | * unsigned int(12) min_spatial_segmentation_idc; |
| 334 | * |
| 335 | * The min_spatial_segmentation_idc indication must indicate a level of |
| 336 | * spatial segmentation equal to or less than the lowest level of |
| 337 | * spatial segmentation indicated in all the parameter sets. |
| 338 | */ |
| 339 | hvcc->min_spatial_segmentation_idc = FFMIN(hvcc->min_spatial_segmentation_idc, |
| 340 | min_spatial_segmentation_idc); |
| 341 | |
| 342 | get_ue_golomb_long(gb); // max_bytes_per_pic_denom |
| 343 | get_ue_golomb_long(gb); // max_bits_per_min_cu_denom |
| 344 | get_ue_golomb_long(gb); // log2_max_mv_length_horizontal |
| 345 | get_ue_golomb_long(gb); // log2_max_mv_length_vertical |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | static void skip_sub_layer_ordering_info(GetBitContext *gb) |
| 350 | { |
| 351 | get_ue_golomb_long(gb); // max_dec_pic_buffering_minus1 |
| 352 | get_ue_golomb_long(gb); // max_num_reorder_pics |
| 353 | get_ue_golomb_long(gb); // max_latency_increase_plus1 |
| 354 | } |
| 355 | |
| 356 | static int hvcc_parse_vps(GetBitContext *gb, |
| 357 | HEVCDecoderConfigurationRecord *hvcc) |
| 358 | { |
| 359 | unsigned int vps_max_sub_layers_minus1; |
| 360 | |
| 361 | /* |
| 362 | * vps_video_parameter_set_id u(4) |
| 363 | * vps_reserved_three_2bits u(2) |
| 364 | * vps_max_layers_minus1 u(6) |
| 365 | */ |
| 366 | skip_bits(gb, 12); |
| 367 | |
| 368 | vps_max_sub_layers_minus1 = get_bits(gb, 3); |
| 369 | |
| 370 | /* |
| 371 | * numTemporalLayers greater than 1 indicates that the stream to which this |
| 372 | * configuration record applies is temporally scalable and the contained |
| 373 | * number of temporal layers (also referred to as temporal sub-layer or |
| 374 | * sub-layer in ISO/IEC 23008-2) is equal to numTemporalLayers. Value 1 |
| 375 | * indicates that the stream is not temporally scalable. Value 0 indicates |
| 376 | * that it is unknown whether the stream is temporally scalable. |
| 377 | */ |
| 378 | hvcc->numTemporalLayers = FFMAX(hvcc->numTemporalLayers, |
| 379 | vps_max_sub_layers_minus1 + 1); |
| 380 | |
| 381 | /* |
| 382 | * vps_temporal_id_nesting_flag u(1) |
| 383 | * vps_reserved_0xffff_16bits u(16) |
| 384 | */ |
| 385 | skip_bits(gb, 17); |
| 386 | |
| 387 | hvcc_parse_ptl(gb, hvcc, vps_max_sub_layers_minus1); |
| 388 | |
| 389 | /* nothing useful for hvcC past this point */ |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | static void skip_scaling_list_data(GetBitContext *gb) |
| 394 | { |
| 395 | int i, j, k, num_coeffs; |
| 396 | |
| 397 | for (i = 0; i < 4; i++) |
| 398 | for (j = 0; j < (i == 3 ? 2 : 6); j++) |
| 399 | if (!get_bits1(gb)) // scaling_list_pred_mode_flag[i][j] |
| 400 | get_ue_golomb_long(gb); // scaling_list_pred_matrix_id_delta[i][j] |
| 401 | else { |
| 402 | num_coeffs = FFMIN(64, 1 << (4 + (i << 1))); |
| 403 | |
| 404 | if (i > 1) |
| 405 | get_se_golomb_long(gb); // scaling_list_dc_coef_minus8[i-2][j] |
| 406 | |
| 407 | for (k = 0; k < num_coeffs; k++) |
| 408 | get_se_golomb_long(gb); // scaling_list_delta_coef |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | static int parse_rps(GetBitContext *gb, unsigned int rps_idx, |
| 413 | unsigned int num_rps, |
| 414 | unsigned int num_delta_pocs[MAX_SHORT_TERM_RPS_COUNT]) |
| 415 | { |
| 416 | unsigned int i; |
| 417 | |
| 418 | if (rps_idx && get_bits1(gb)) { // inter_ref_pic_set_prediction_flag |
| 419 | /* this should only happen for slice headers, and this isn't one */ |
| 420 | if (rps_idx >= num_rps) |
| 421 | return AVERROR_INVALIDDATA; |
| 422 | |
| 423 | skip_bits1 (gb); // delta_rps_sign |
| 424 | get_ue_golomb_long(gb); // abs_delta_rps_minus1 |
| 425 | |
| 426 | num_delta_pocs[rps_idx] = 0; |
| 427 | |
| 428 | /* |
| 429 | * From libavcodec/hevc_ps.c: |
| 430 | * |
| 431 | * if (is_slice_header) { |
| 432 | * //foo |
| 433 | * } else |
| 434 | * rps_ridx = &sps->st_rps[rps - sps->st_rps - 1]; |
| 435 | * |
| 436 | * where: |
| 437 | * rps: &sps->st_rps[rps_idx] |
| 438 | * sps->st_rps: &sps->st_rps[0] |
| 439 | * is_slice_header: rps_idx == num_rps |
| 440 | * |
| 441 | * thus: |
| 442 | * if (num_rps != rps_idx) |
| 443 | * rps_ridx = &sps->st_rps[rps_idx - 1]; |
| 444 | * |
| 445 | * NumDeltaPocs[RefRpsIdx]: num_delta_pocs[rps_idx - 1] |
| 446 | */ |
| 447 | for (i = 0; i < num_delta_pocs[rps_idx - 1]; i++) { |
| 448 | uint8_t use_delta_flag = 0; |
| 449 | uint8_t used_by_curr_pic_flag = get_bits1(gb); |
| 450 | if (!used_by_curr_pic_flag) |
| 451 | use_delta_flag = get_bits1(gb); |
| 452 | |
| 453 | if (used_by_curr_pic_flag || use_delta_flag) |
| 454 | num_delta_pocs[rps_idx]++; |
| 455 | } |
| 456 | } else { |
| 457 | unsigned int num_negative_pics = get_ue_golomb_long(gb); |
| 458 | unsigned int num_positive_pics = get_ue_golomb_long(gb); |
| 459 | |
| 460 | num_delta_pocs[rps_idx] = num_negative_pics + num_positive_pics; |
| 461 | |
| 462 | for (i = 0; i < num_negative_pics; i++) { |
| 463 | get_ue_golomb_long(gb); // delta_poc_s0_minus1[rps_idx] |
| 464 | skip_bits1 (gb); // used_by_curr_pic_s0_flag[rps_idx] |
| 465 | } |
| 466 | |
| 467 | for (i = 0; i < num_positive_pics; i++) { |
| 468 | get_ue_golomb_long(gb); // delta_poc_s1_minus1[rps_idx] |
| 469 | skip_bits1 (gb); // used_by_curr_pic_s1_flag[rps_idx] |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | return 0; |
| 474 | } |
| 475 | |
| 476 | static int hvcc_parse_sps(GetBitContext *gb, |
| 477 | HEVCDecoderConfigurationRecord *hvcc) |
| 478 | { |
| 479 | unsigned int i, sps_max_sub_layers_minus1, log2_max_pic_order_cnt_lsb_minus4; |
| 480 | unsigned int num_short_term_ref_pic_sets, num_delta_pocs[MAX_SHORT_TERM_RPS_COUNT]; |
| 481 | |
| 482 | skip_bits(gb, 4); // sps_video_parameter_set_id |
| 483 | |
| 484 | sps_max_sub_layers_minus1 = get_bits (gb, 3); |
| 485 | |
| 486 | /* |
| 487 | * numTemporalLayers greater than 1 indicates that the stream to which this |
| 488 | * configuration record applies is temporally scalable and the contained |
| 489 | * number of temporal layers (also referred to as temporal sub-layer or |
| 490 | * sub-layer in ISO/IEC 23008-2) is equal to numTemporalLayers. Value 1 |
| 491 | * indicates that the stream is not temporally scalable. Value 0 indicates |
| 492 | * that it is unknown whether the stream is temporally scalable. |
| 493 | */ |
| 494 | hvcc->numTemporalLayers = FFMAX(hvcc->numTemporalLayers, |
| 495 | sps_max_sub_layers_minus1 + 1); |
| 496 | |
| 497 | hvcc->temporalIdNested = get_bits1(gb); |
| 498 | |
| 499 | hvcc_parse_ptl(gb, hvcc, sps_max_sub_layers_minus1); |
| 500 | |
| 501 | get_ue_golomb_long(gb); // sps_seq_parameter_set_id |
| 502 | |
| 503 | hvcc->chromaFormat = get_ue_golomb_long(gb); |
| 504 | |
| 505 | if (hvcc->chromaFormat == 3) |
| 506 | skip_bits1(gb); // separate_colour_plane_flag |
| 507 | |
| 508 | get_ue_golomb_long(gb); // pic_width_in_luma_samples |
| 509 | get_ue_golomb_long(gb); // pic_height_in_luma_samples |
| 510 | |
| 511 | if (get_bits1(gb)) { // conformance_window_flag |
| 512 | get_ue_golomb_long(gb); // conf_win_left_offset |
| 513 | get_ue_golomb_long(gb); // conf_win_right_offset |
| 514 | get_ue_golomb_long(gb); // conf_win_top_offset |
| 515 | get_ue_golomb_long(gb); // conf_win_bottom_offset |
| 516 | } |
| 517 | |
| 518 | hvcc->bitDepthLumaMinus8 = get_ue_golomb_long(gb); |
| 519 | hvcc->bitDepthChromaMinus8 = get_ue_golomb_long(gb); |
| 520 | log2_max_pic_order_cnt_lsb_minus4 = get_ue_golomb_long(gb); |
| 521 | |
| 522 | /* sps_sub_layer_ordering_info_present_flag */ |
| 523 | i = get_bits1(gb) ? 0 : sps_max_sub_layers_minus1; |
| 524 | for (; i <= sps_max_sub_layers_minus1; i++) |
| 525 | skip_sub_layer_ordering_info(gb); |
| 526 | |
| 527 | get_ue_golomb_long(gb); // log2_min_luma_coding_block_size_minus3 |
| 528 | get_ue_golomb_long(gb); // log2_diff_max_min_luma_coding_block_size |
| 529 | get_ue_golomb_long(gb); // log2_min_transform_block_size_minus2 |
| 530 | get_ue_golomb_long(gb); // log2_diff_max_min_transform_block_size |
| 531 | get_ue_golomb_long(gb); // max_transform_hierarchy_depth_inter |
| 532 | get_ue_golomb_long(gb); // max_transform_hierarchy_depth_intra |
| 533 | |
| 534 | if (get_bits1(gb) && // scaling_list_enabled_flag |
| 535 | get_bits1(gb)) // sps_scaling_list_data_present_flag |
| 536 | skip_scaling_list_data(gb); |
| 537 | |
| 538 | skip_bits1(gb); // amp_enabled_flag |
| 539 | skip_bits1(gb); // sample_adaptive_offset_enabled_flag |
| 540 | |
| 541 | if (get_bits1(gb)) { // pcm_enabled_flag |
| 542 | skip_bits (gb, 4); // pcm_sample_bit_depth_luma_minus1 |
| 543 | skip_bits (gb, 4); // pcm_sample_bit_depth_chroma_minus1 |
| 544 | get_ue_golomb_long(gb); // log2_min_pcm_luma_coding_block_size_minus3 |
| 545 | get_ue_golomb_long(gb); // log2_diff_max_min_pcm_luma_coding_block_size |
| 546 | skip_bits1 (gb); // pcm_loop_filter_disabled_flag |
| 547 | } |
| 548 | |
| 549 | num_short_term_ref_pic_sets = get_ue_golomb_long(gb); |
| 550 | if (num_short_term_ref_pic_sets > MAX_SHORT_TERM_RPS_COUNT) |
| 551 | return AVERROR_INVALIDDATA; |
| 552 | |
| 553 | for (i = 0; i < num_short_term_ref_pic_sets; i++) { |
| 554 | int ret = parse_rps(gb, i, num_short_term_ref_pic_sets, num_delta_pocs); |
| 555 | if (ret < 0) |
| 556 | return ret; |
| 557 | } |
| 558 | |
| 559 | if (get_bits1(gb)) { // long_term_ref_pics_present_flag |
| 560 | for (i = 0; i < get_ue_golomb_long(gb); i++) { // num_long_term_ref_pics_sps |
| 561 | int len = FFMIN(log2_max_pic_order_cnt_lsb_minus4 + 4, 16); |
| 562 | skip_bits (gb, len); // lt_ref_pic_poc_lsb_sps[i] |
| 563 | skip_bits1(gb); // used_by_curr_pic_lt_sps_flag[i] |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | skip_bits1(gb); // sps_temporal_mvp_enabled_flag |
| 568 | skip_bits1(gb); // strong_intra_smoothing_enabled_flag |
| 569 | |
| 570 | if (get_bits1(gb)) // vui_parameters_present_flag |
| 571 | hvcc_parse_vui(gb, hvcc, sps_max_sub_layers_minus1); |
| 572 | |
| 573 | /* nothing useful for hvcC past this point */ |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | static int hvcc_parse_pps(GetBitContext *gb, |
| 578 | HEVCDecoderConfigurationRecord *hvcc) |
| 579 | { |
| 580 | uint8_t tiles_enabled_flag, entropy_coding_sync_enabled_flag; |
| 581 | |
| 582 | get_ue_golomb_long(gb); // pps_pic_parameter_set_id |
| 583 | get_ue_golomb_long(gb); // pps_seq_parameter_set_id |
| 584 | |
| 585 | /* |
| 586 | * dependent_slice_segments_enabled_flag u(1) |
| 587 | * output_flag_present_flag u(1) |
| 588 | * num_extra_slice_header_bits u(3) |
| 589 | * sign_data_hiding_enabled_flag u(1) |
| 590 | * cabac_init_present_flag u(1) |
| 591 | */ |
| 592 | skip_bits(gb, 7); |
| 593 | |
| 594 | get_ue_golomb_long(gb); // num_ref_idx_l0_default_active_minus1 |
| 595 | get_ue_golomb_long(gb); // num_ref_idx_l1_default_active_minus1 |
| 596 | get_se_golomb_long(gb); // init_qp_minus26 |
| 597 | |
| 598 | /* |
| 599 | * constrained_intra_pred_flag u(1) |
| 600 | * transform_skip_enabled_flag u(1) |
| 601 | */ |
| 602 | skip_bits(gb, 2); |
| 603 | |
| 604 | if (get_bits1(gb)) // cu_qp_delta_enabled_flag |
| 605 | get_ue_golomb_long(gb); // diff_cu_qp_delta_depth |
| 606 | |
| 607 | get_se_golomb_long(gb); // pps_cb_qp_offset |
| 608 | get_se_golomb_long(gb); // pps_cr_qp_offset |
| 609 | |
| 610 | /* |
| 611 | * weighted_pred_flag u(1) |
| 612 | * weighted_bipred_flag u(1) |
| 613 | * transquant_bypass_enabled_flag u(1) |
| 614 | */ |
| 615 | skip_bits(gb, 3); |
| 616 | |
| 617 | tiles_enabled_flag = get_bits1(gb); |
| 618 | entropy_coding_sync_enabled_flag = get_bits1(gb); |
| 619 | |
| 620 | if (entropy_coding_sync_enabled_flag && tiles_enabled_flag) |
| 621 | hvcc->parallelismType = 0; // mixed-type parallel decoding |
| 622 | else if (entropy_coding_sync_enabled_flag) |
| 623 | hvcc->parallelismType = 3; // wavefront-based parallel decoding |
| 624 | else if (tiles_enabled_flag) |
| 625 | hvcc->parallelismType = 2; // tile-based parallel decoding |
| 626 | else |
| 627 | hvcc->parallelismType = 1; // slice-based parallel decoding |
| 628 | |
| 629 | /* nothing useful for hvcC past this point */ |
| 630 | return 0; |
| 631 | } |
| 632 | |
| 633 | static uint8_t *nal_unit_extract_rbsp(const uint8_t *src, uint32_t src_len, |
| 634 | uint32_t *dst_len) |
| 635 | { |
| 636 | uint8_t *dst; |
| 637 | uint32_t i, len; |
| 638 | |
| 639 | dst = av_malloc(src_len); |
| 640 | if (!dst) |
| 641 | return NULL; |
| 642 | |
| 643 | /* NAL unit header (2 bytes) */ |
| 644 | i = len = 0; |
| 645 | while (i < 2 && i < src_len) |
| 646 | dst[len++] = src[i++]; |
| 647 | |
| 648 | while (i + 2 < src_len) |
| 649 | if (!src[i] && !src[i + 1] && src[i + 2] == 3) { |
| 650 | dst[len++] = src[i++]; |
| 651 | dst[len++] = src[i++]; |
| 652 | i++; // remove emulation_prevention_three_byte |
| 653 | } else |
| 654 | dst[len++] = src[i++]; |
| 655 | |
| 656 | while (i < src_len) |
| 657 | dst[len++] = src[i++]; |
| 658 | |
| 659 | *dst_len = len; |
| 660 | return dst; |
| 661 | } |
| 662 | |
| 663 | |
| 664 | |
| 665 | static void nal_unit_parse_header(GetBitContext *gb, uint8_t *nal_type) |
| 666 | { |
| 667 | skip_bits1(gb); // forbidden_zero_bit |
| 668 | |
| 669 | *nal_type = get_bits(gb, 6); |
| 670 | |
| 671 | /* |
| 672 | * nuh_layer_id u(6) |
| 673 | * nuh_temporal_id_plus1 u(3) |
| 674 | */ |
| 675 | skip_bits(gb, 9); |
| 676 | } |
| 677 | |
| 678 | static int hvcc_array_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size, |
| 679 | uint8_t nal_type, int ps_array_completeness, |
| 680 | HEVCDecoderConfigurationRecord *hvcc) |
| 681 | { |
| 682 | int ret; |
| 683 | uint8_t index; |
| 684 | uint16_t numNalus; |
| 685 | HVCCNALUnitArray *array; |
| 686 | |
| 687 | for (index = 0; index < hvcc->numOfArrays; index++) |
| 688 | if (hvcc->array[index].NAL_unit_type == nal_type) |
| 689 | break; |
| 690 | |
| 691 | if (index >= hvcc->numOfArrays) { |
| 692 | uint8_t i; |
| 693 | |
| 694 | ret = av_reallocp_array(&hvcc->array, index + 1, sizeof(HVCCNALUnitArray)); |
| 695 | if (ret < 0) |
| 696 | return ret; |
| 697 | |
| 698 | for (i = hvcc->numOfArrays; i <= index; i++) |
| 699 | memset(&hvcc->array[i], 0, sizeof(HVCCNALUnitArray)); |
| 700 | hvcc->numOfArrays = index + 1; |
| 701 | } |
| 702 | |
| 703 | array = &hvcc->array[index]; |
| 704 | numNalus = array->numNalus; |
| 705 | |
| 706 | ret = av_reallocp_array(&array->nalUnit, numNalus + 1, sizeof(uint8_t*)); |
| 707 | if (ret < 0) |
| 708 | return ret; |
| 709 | |
| 710 | ret = av_reallocp_array(&array->nalUnitLength, numNalus + 1, sizeof(uint16_t)); |
| 711 | if (ret < 0) |
| 712 | return ret; |
| 713 | |
| 714 | array->nalUnit [numNalus] = nal_buf; |
| 715 | array->nalUnitLength[numNalus] = nal_size; |
| 716 | array->NAL_unit_type = nal_type; |
| 717 | array->numNalus++; |
| 718 | |
| 719 | /* |
| 720 | * When the sample entry name is ‘hvc1’, the default and mandatory value of |
| 721 | * array_completeness is 1 for arrays of all types of parameter sets, and 0 |
| 722 | * for all other arrays. When the sample entry name is ‘hev1’, the default |
| 723 | * value of array_completeness is 0 for all arrays. |
| 724 | */ |
| 725 | if (nal_type == NAL_VPS || nal_type == NAL_SPS || nal_type == NAL_PPS) |
| 726 | array->array_completeness = ps_array_completeness; |
| 727 | |
| 728 | return 0; |
| 729 | } |
| 730 | |
| 731 | static int hvcc_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size, |
| 732 | int ps_array_completeness, |
| 733 | HEVCDecoderConfigurationRecord *hvcc) |
| 734 | { |
| 735 | int ret = 0; |
| 736 | GetBitContext gbc; |
| 737 | uint8_t nal_type; |
| 738 | uint8_t *rbsp_buf; |
| 739 | uint32_t rbsp_size; |
| 740 | |
| 741 | rbsp_buf = nal_unit_extract_rbsp(nal_buf, nal_size, &rbsp_size); |
| 742 | if (!rbsp_buf) { |
| 743 | ret = AVERROR(ENOMEM); |
| 744 | goto end; |
| 745 | } |
| 746 | |
| 747 | ret = init_get_bits8(&gbc, rbsp_buf, rbsp_size); |
| 748 | if (ret < 0) |
| 749 | goto end; |
| 750 | |
| 751 | nal_unit_parse_header(&gbc, &nal_type); |
| 752 | |
| 753 | /* |
| 754 | * Note: only 'declarative' SEI messages are allowed in |
| 755 | * hvcC. Perhaps the SEI playload type should be checked |
| 756 | * and non-declarative SEI messages discarded? |
| 757 | */ |
| 758 | switch (nal_type) { |
| 759 | case NAL_VPS: |
| 760 | case NAL_SPS: |
| 761 | case NAL_PPS: |
| 762 | case NAL_SEI_PREFIX: |
| 763 | case NAL_SEI_SUFFIX: |
| 764 | ret = hvcc_array_add_nal_unit(nal_buf, nal_size, nal_type, |
| 765 | ps_array_completeness, hvcc); |
| 766 | if (ret < 0) |
| 767 | goto end; |
| 768 | else if (nal_type == NAL_VPS) |
| 769 | ret = hvcc_parse_vps(&gbc, hvcc); |
| 770 | else if (nal_type == NAL_SPS) |
| 771 | ret = hvcc_parse_sps(&gbc, hvcc); |
| 772 | else if (nal_type == NAL_PPS) |
| 773 | ret = hvcc_parse_pps(&gbc, hvcc); |
| 774 | if (ret < 0) |
| 775 | goto end; |
| 776 | break; |
| 777 | default: |
| 778 | ret = AVERROR_INVALIDDATA; |
| 779 | goto end; |
| 780 | } |
| 781 | |
| 782 | end: |
| 783 | av_free(rbsp_buf); |
| 784 | return ret; |
| 785 | } |
| 786 | |
| 787 | static void hvcc_init(HEVCDecoderConfigurationRecord *hvcc) |
| 788 | { |
| 789 | memset(hvcc, 0, sizeof(HEVCDecoderConfigurationRecord)); |
| 790 | hvcc->configurationVersion = 1; |
| 791 | hvcc->lengthSizeMinusOne = 3; // 4 bytes |
| 792 | |
| 793 | /* |
| 794 | * The following fields have all their valid bits set by default, |
| 795 | * the ProfileTierLevel parsing code will unset them when needed. |
| 796 | */ |
| 797 | hvcc->general_profile_compatibility_flags = 0xffffffff; |
| 798 | hvcc->general_constraint_indicator_flags = 0xffffffffffff; |
| 799 | |
| 800 | /* |
| 801 | * Initialize this field with an invalid value which can be used to detect |
| 802 | * whether we didn't see any VUI (in which case it should be reset to zero). |
| 803 | */ |
| 804 | hvcc->min_spatial_segmentation_idc = MAX_SPATIAL_SEGMENTATION + 1; |
| 805 | } |
| 806 | |
| 807 | static void hvcc_close(HEVCDecoderConfigurationRecord *hvcc) |
| 808 | { |
| 809 | uint8_t i; |
| 810 | |
| 811 | for (i = 0; i < hvcc->numOfArrays; i++) { |
| 812 | hvcc->array[i].numNalus = 0; |
| 813 | av_freep(&hvcc->array[i].nalUnit); |
| 814 | av_freep(&hvcc->array[i].nalUnitLength); |
| 815 | } |
| 816 | |
| 817 | hvcc->numOfArrays = 0; |
| 818 | av_freep(&hvcc->array); |
| 819 | } |
| 820 | |
| 821 | static int hvcc_write(AVIOContext *pb, HEVCDecoderConfigurationRecord *hvcc) |
| 822 | { |
| 823 | uint8_t i; |
| 824 | uint16_t j, vps_count = 0, sps_count = 0, pps_count = 0; |
| 825 | |
| 826 | /* |
| 827 | * We only support writing HEVCDecoderConfigurationRecord version 1. |
| 828 | */ |
| 829 | hvcc->configurationVersion = 1; |
| 830 | |
| 831 | /* |
| 832 | * If min_spatial_segmentation_idc is invalid, reset to 0 (unspecified). |
| 833 | */ |
| 834 | if (hvcc->min_spatial_segmentation_idc > MAX_SPATIAL_SEGMENTATION) |
| 835 | hvcc->min_spatial_segmentation_idc = 0; |
| 836 | |
| 837 | /* |
| 838 | * parallelismType indicates the type of parallelism that is used to meet |
| 839 | * the restrictions imposed by min_spatial_segmentation_idc when the value |
| 840 | * of min_spatial_segmentation_idc is greater than 0. |
| 841 | */ |
| 842 | if (!hvcc->min_spatial_segmentation_idc) |
| 843 | hvcc->parallelismType = 0; |
| 844 | |
| 845 | /* |
| 846 | * It's unclear how to properly compute these fields, so |
| 847 | * let's always set them to values meaning 'unspecified'. |
| 848 | */ |
| 849 | hvcc->avgFrameRate = 0; |
| 850 | hvcc->constantFrameRate = 0; |
| 851 | |
| 852 | av_dlog(NULL, "configurationVersion: %"PRIu8"\n", |
| 853 | hvcc->configurationVersion); |
| 854 | av_dlog(NULL, "general_profile_space: %"PRIu8"\n", |
| 855 | hvcc->general_profile_space); |
| 856 | av_dlog(NULL, "general_tier_flag: %"PRIu8"\n", |
| 857 | hvcc->general_tier_flag); |
| 858 | av_dlog(NULL, "general_profile_idc: %"PRIu8"\n", |
| 859 | hvcc->general_profile_idc); |
| 860 | av_dlog(NULL, "general_profile_compatibility_flags: 0x%08"PRIx32"\n", |
| 861 | hvcc->general_profile_compatibility_flags); |
| 862 | av_dlog(NULL, "general_constraint_indicator_flags: 0x%012"PRIx64"\n", |
| 863 | hvcc->general_constraint_indicator_flags); |
| 864 | av_dlog(NULL, "general_level_idc: %"PRIu8"\n", |
| 865 | hvcc->general_level_idc); |
| 866 | av_dlog(NULL, "min_spatial_segmentation_idc: %"PRIu16"\n", |
| 867 | hvcc->min_spatial_segmentation_idc); |
| 868 | av_dlog(NULL, "parallelismType: %"PRIu8"\n", |
| 869 | hvcc->parallelismType); |
| 870 | av_dlog(NULL, "chromaFormat: %"PRIu8"\n", |
| 871 | hvcc->chromaFormat); |
| 872 | av_dlog(NULL, "bitDepthLumaMinus8: %"PRIu8"\n", |
| 873 | hvcc->bitDepthLumaMinus8); |
| 874 | av_dlog(NULL, "bitDepthChromaMinus8: %"PRIu8"\n", |
| 875 | hvcc->bitDepthChromaMinus8); |
| 876 | av_dlog(NULL, "avgFrameRate: %"PRIu16"\n", |
| 877 | hvcc->avgFrameRate); |
| 878 | av_dlog(NULL, "constantFrameRate: %"PRIu8"\n", |
| 879 | hvcc->constantFrameRate); |
| 880 | av_dlog(NULL, "numTemporalLayers: %"PRIu8"\n", |
| 881 | hvcc->numTemporalLayers); |
| 882 | av_dlog(NULL, "temporalIdNested: %"PRIu8"\n", |
| 883 | hvcc->temporalIdNested); |
| 884 | av_dlog(NULL, "lengthSizeMinusOne: %"PRIu8"\n", |
| 885 | hvcc->lengthSizeMinusOne); |
| 886 | av_dlog(NULL, "numOfArrays: %"PRIu8"\n", |
| 887 | hvcc->numOfArrays); |
| 888 | for (i = 0; i < hvcc->numOfArrays; i++) { |
| 889 | av_dlog(NULL, "array_completeness[%"PRIu8"]: %"PRIu8"\n", |
| 890 | i, hvcc->array[i].array_completeness); |
| 891 | av_dlog(NULL, "NAL_unit_type[%"PRIu8"]: %"PRIu8"\n", |
| 892 | i, hvcc->array[i].NAL_unit_type); |
| 893 | av_dlog(NULL, "numNalus[%"PRIu8"]: %"PRIu16"\n", |
| 894 | i, hvcc->array[i].numNalus); |
| 895 | for (j = 0; j < hvcc->array[i].numNalus; j++) |
| 896 | av_dlog(NULL, |
| 897 | "nalUnitLength[%"PRIu8"][%"PRIu16"]: %"PRIu16"\n", |
| 898 | i, j, hvcc->array[i].nalUnitLength[j]); |
| 899 | } |
| 900 | |
| 901 | /* |
| 902 | * We need at least one of each: VPS, SPS and PPS. |
| 903 | */ |
| 904 | for (i = 0; i < hvcc->numOfArrays; i++) |
| 905 | switch (hvcc->array[i].NAL_unit_type) { |
| 906 | case NAL_VPS: |
| 907 | vps_count += hvcc->array[i].numNalus; |
| 908 | break; |
| 909 | case NAL_SPS: |
| 910 | sps_count += hvcc->array[i].numNalus; |
| 911 | break; |
| 912 | case NAL_PPS: |
| 913 | pps_count += hvcc->array[i].numNalus; |
| 914 | break; |
| 915 | default: |
| 916 | break; |
| 917 | } |
| 918 | if (!vps_count || vps_count > MAX_VPS_COUNT || |
| 919 | !sps_count || sps_count > MAX_SPS_COUNT || |
| 920 | !pps_count || pps_count > MAX_PPS_COUNT) |
| 921 | return AVERROR_INVALIDDATA; |
| 922 | |
| 923 | /* unsigned int(8) configurationVersion = 1; */ |
| 924 | avio_w8(pb, hvcc->configurationVersion); |
| 925 | |
| 926 | /* |
| 927 | * unsigned int(2) general_profile_space; |
| 928 | * unsigned int(1) general_tier_flag; |
| 929 | * unsigned int(5) general_profile_idc; |
| 930 | */ |
| 931 | avio_w8(pb, hvcc->general_profile_space << 6 | |
| 932 | hvcc->general_tier_flag << 5 | |
| 933 | hvcc->general_profile_idc); |
| 934 | |
| 935 | /* unsigned int(32) general_profile_compatibility_flags; */ |
| 936 | avio_wb32(pb, hvcc->general_profile_compatibility_flags); |
| 937 | |
| 938 | /* unsigned int(48) general_constraint_indicator_flags; */ |
| 939 | avio_wb32(pb, hvcc->general_constraint_indicator_flags >> 16); |
| 940 | avio_wb16(pb, hvcc->general_constraint_indicator_flags); |
| 941 | |
| 942 | /* unsigned int(8) general_level_idc; */ |
| 943 | avio_w8(pb, hvcc->general_level_idc); |
| 944 | |
| 945 | /* |
| 946 | * bit(4) reserved = ‘1111’b; |
| 947 | * unsigned int(12) min_spatial_segmentation_idc; |
| 948 | */ |
| 949 | avio_wb16(pb, hvcc->min_spatial_segmentation_idc | 0xf000); |
| 950 | |
| 951 | /* |
| 952 | * bit(6) reserved = ‘111111’b; |
| 953 | * unsigned int(2) parallelismType; |
| 954 | */ |
| 955 | avio_w8(pb, hvcc->parallelismType | 0xfc); |
| 956 | |
| 957 | /* |
| 958 | * bit(6) reserved = ‘111111’b; |
| 959 | * unsigned int(2) chromaFormat; |
| 960 | */ |
| 961 | avio_w8(pb, hvcc->chromaFormat | 0xfc); |
| 962 | |
| 963 | /* |
| 964 | * bit(5) reserved = ‘11111’b; |
| 965 | * unsigned int(3) bitDepthLumaMinus8; |
| 966 | */ |
| 967 | avio_w8(pb, hvcc->bitDepthLumaMinus8 | 0xf8); |
| 968 | |
| 969 | /* |
| 970 | * bit(5) reserved = ‘11111’b; |
| 971 | * unsigned int(3) bitDepthChromaMinus8; |
| 972 | */ |
| 973 | avio_w8(pb, hvcc->bitDepthChromaMinus8 | 0xf8); |
| 974 | |
| 975 | /* bit(16) avgFrameRate; */ |
| 976 | avio_wb16(pb, hvcc->avgFrameRate); |
| 977 | |
| 978 | /* |
| 979 | * bit(2) constantFrameRate; |
| 980 | * bit(3) numTemporalLayers; |
| 981 | * bit(1) temporalIdNested; |
| 982 | * unsigned int(2) lengthSizeMinusOne; |
| 983 | */ |
| 984 | avio_w8(pb, hvcc->constantFrameRate << 6 | |
| 985 | hvcc->numTemporalLayers << 3 | |
| 986 | hvcc->temporalIdNested << 2 | |
| 987 | hvcc->lengthSizeMinusOne); |
| 988 | |
| 989 | /* unsigned int(8) numOfArrays; */ |
| 990 | avio_w8(pb, hvcc->numOfArrays); |
| 991 | |
| 992 | for (i = 0; i < hvcc->numOfArrays; i++) { |
| 993 | /* |
| 994 | * bit(1) array_completeness; |
| 995 | * unsigned int(1) reserved = 0; |
| 996 | * unsigned int(6) NAL_unit_type; |
| 997 | */ |
| 998 | avio_w8(pb, hvcc->array[i].array_completeness << 7 | |
| 999 | hvcc->array[i].NAL_unit_type & 0x3f); |
| 1000 | |
| 1001 | /* unsigned int(16) numNalus; */ |
| 1002 | avio_wb16(pb, hvcc->array[i].numNalus); |
| 1003 | |
| 1004 | for (j = 0; j < hvcc->array[i].numNalus; j++) { |
| 1005 | /* unsigned int(16) nalUnitLength; */ |
| 1006 | avio_wb16(pb, hvcc->array[i].nalUnitLength[j]); |
| 1007 | |
| 1008 | /* bit(8*nalUnitLength) nalUnit; */ |
| 1009 | avio_write(pb, hvcc->array[i].nalUnit[j], |
| 1010 | hvcc->array[i].nalUnitLength[j]); |
| 1011 | } |
| 1012 | } |
| 1013 | |
| 1014 | return 0; |
| 1015 | } |
| 1016 | |
| 1017 | int ff_hevc_annexb2mp4(AVIOContext *pb, const uint8_t *buf_in, |
| 1018 | int size, int filter_ps, int *ps_count) |
| 1019 | { |
| 1020 | int num_ps = 0, ret = 0; |
| 1021 | uint8_t *buf, *end, *start = NULL; |
| 1022 | |
| 1023 | if (!filter_ps) { |
| 1024 | ret = ff_avc_parse_nal_units(pb, buf_in, size); |
| 1025 | goto end; |
| 1026 | } |
| 1027 | |
| 1028 | ret = ff_avc_parse_nal_units_buf(buf_in, &start, &size); |
| 1029 | if (ret < 0) |
| 1030 | goto end; |
| 1031 | |
| 1032 | ret = 0; |
| 1033 | buf = start; |
| 1034 | end = start + size; |
| 1035 | |
| 1036 | while (end - buf > 4) { |
| 1037 | uint32_t len = FFMIN(AV_RB32(buf), end - buf - 4); |
| 1038 | uint8_t type = (buf[4] >> 1) & 0x3f; |
| 1039 | |
| 1040 | buf += 4; |
| 1041 | |
| 1042 | switch (type) { |
| 1043 | case NAL_VPS: |
| 1044 | case NAL_SPS: |
| 1045 | case NAL_PPS: |
| 1046 | num_ps++; |
| 1047 | break; |
| 1048 | default: |
| 1049 | ret += 4 + len; |
| 1050 | avio_wb32(pb, len); |
| 1051 | avio_write(pb, buf, len); |
| 1052 | break; |
| 1053 | } |
| 1054 | |
| 1055 | buf += len; |
| 1056 | } |
| 1057 | |
| 1058 | end: |
| 1059 | av_free(start); |
| 1060 | if (ps_count) |
| 1061 | *ps_count = num_ps; |
| 1062 | return ret; |
| 1063 | } |
| 1064 | |
| 1065 | int ff_hevc_annexb2mp4_buf(const uint8_t *buf_in, uint8_t **buf_out, |
| 1066 | int *size, int filter_ps, int *ps_count) |
| 1067 | { |
| 1068 | AVIOContext *pb; |
| 1069 | int ret; |
| 1070 | |
| 1071 | ret = avio_open_dyn_buf(&pb); |
| 1072 | if (ret < 0) |
| 1073 | return ret; |
| 1074 | |
| 1075 | ret = ff_hevc_annexb2mp4(pb, buf_in, *size, filter_ps, ps_count); |
| 1076 | *size = avio_close_dyn_buf(pb, buf_out); |
| 1077 | |
| 1078 | return ret; |
| 1079 | } |
| 1080 | |
| 1081 | int ff_isom_write_hvcc(AVIOContext *pb, const uint8_t *data, |
| 1082 | int size, int ps_array_completeness) |
| 1083 | { |
| 1084 | int ret = 0; |
| 1085 | uint8_t *buf, *end, *start = NULL; |
| 1086 | HEVCDecoderConfigurationRecord hvcc; |
| 1087 | |
| 1088 | hvcc_init(&hvcc); |
| 1089 | |
| 1090 | if (size < 6) { |
| 1091 | /* We can't write a valid hvcC from the provided data */ |
| 1092 | ret = AVERROR_INVALIDDATA; |
| 1093 | goto end; |
| 1094 | } else if (*data == 1) { |
| 1095 | /* Data is already hvcC-formatted */ |
| 1096 | avio_write(pb, data, size); |
| 1097 | goto end; |
| 1098 | } else if (!(AV_RB24(data) == 1 || AV_RB32(data) == 1)) { |
| 1099 | /* Not a valid Annex B start code prefix */ |
| 1100 | ret = AVERROR_INVALIDDATA; |
| 1101 | goto end; |
| 1102 | } |
| 1103 | |
| 1104 | ret = ff_avc_parse_nal_units_buf(data, &start, &size); |
| 1105 | if (ret < 0) |
| 1106 | goto end; |
| 1107 | |
| 1108 | buf = start; |
| 1109 | end = start + size; |
| 1110 | |
| 1111 | while (end - buf > 4) { |
| 1112 | uint32_t len = FFMIN(AV_RB32(buf), end - buf - 4); |
| 1113 | uint8_t type = (buf[4] >> 1) & 0x3f; |
| 1114 | |
| 1115 | buf += 4; |
| 1116 | |
| 1117 | switch (type) { |
| 1118 | case NAL_VPS: |
| 1119 | case NAL_SPS: |
| 1120 | case NAL_PPS: |
| 1121 | case NAL_SEI_PREFIX: |
| 1122 | case NAL_SEI_SUFFIX: |
| 1123 | ret = hvcc_add_nal_unit(buf, len, ps_array_completeness, &hvcc); |
| 1124 | if (ret < 0) |
| 1125 | goto end; |
| 1126 | break; |
| 1127 | default: |
| 1128 | break; |
| 1129 | } |
| 1130 | |
| 1131 | buf += len; |
| 1132 | } |
| 1133 | |
| 1134 | ret = hvcc_write(pb, &hvcc); |
| 1135 | |
| 1136 | end: |
| 1137 | hvcc_close(&hvcc); |
| 1138 | av_free(start); |
| 1139 | return ret; |
| 1140 | } |