| File: | root/firefox-clang/obj-x86_64-pc-linux-gnu/media/libnestegg/src/./../../../../media/libnestegg/src/nestegg.c |
| Warning: | line 516, column 8 Excessive padding in 'struct ebml_element_desc' (8 padding bytes, where 0 is optimal). Optimal fields order: name, id, offset, children, size, data_offset, default_uint, default_float, type, flags, consider reordering the fields or adding explicit padding members |
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| 1 | /* |
| 2 | * Copyright © 2010 Mozilla Foundation |
| 3 | * |
| 4 | * This program is made available under an ISC-style license. See the |
| 5 | * accompanying file LICENSE for details. |
| 6 | */ |
| 7 | #include <assert.h> |
| 8 | #include <stddef.h> |
| 9 | #include <stdlib.h> |
| 10 | #include <string.h> |
| 11 | |
| 12 | #include "nestegg/nestegg.h" |
| 13 | |
| 14 | /* EBML Elements */ |
| 15 | #define ID_EBML0x1a45dfa3 0x1a45dfa3 |
| 16 | #define ID_EBML_VERSION0x4286 0x4286 |
| 17 | #define ID_EBML_READ_VERSION0x42f7 0x42f7 |
| 18 | #define ID_EBML_MAX_ID_LENGTH0x42f2 0x42f2 |
| 19 | #define ID_EBML_MAX_SIZE_LENGTH0x42f3 0x42f3 |
| 20 | #define ID_DOCTYPE0x4282 0x4282 |
| 21 | #define ID_DOCTYPE_VERSION0x4287 0x4287 |
| 22 | #define ID_DOCTYPE_READ_VERSION0x4285 0x4285 |
| 23 | |
| 24 | /* Global Elements */ |
| 25 | #define ID_VOID0xec 0xec |
| 26 | #define ID_CRC320xbf 0xbf |
| 27 | |
| 28 | /* WebM Elements */ |
| 29 | #define ID_SEGMENT0x18538067 0x18538067 |
| 30 | |
| 31 | /* Seek Head Elements */ |
| 32 | #define ID_SEEK_HEAD0x114d9b74 0x114d9b74 |
| 33 | #define ID_SEEK0x4dbb 0x4dbb |
| 34 | #define ID_SEEK_ID0x53ab 0x53ab |
| 35 | #define ID_SEEK_POSITION0x53ac 0x53ac |
| 36 | |
| 37 | /* Info Elements */ |
| 38 | #define ID_INFO0x1549a966 0x1549a966 |
| 39 | #define ID_TIMECODE_SCALE0x2ad7b1 0x2ad7b1 |
| 40 | #define ID_DURATION0x4489 0x4489 |
| 41 | |
| 42 | /* Cluster Elements */ |
| 43 | #define ID_CLUSTER0x1f43b675 0x1f43b675 |
| 44 | #define ID_TIMECODE0xe7 0xe7 |
| 45 | #define ID_BLOCK_GROUP0xa0 0xa0 |
| 46 | #define ID_SIMPLE_BLOCK0xa3 0xa3 |
| 47 | |
| 48 | /* BlockGroup Elements */ |
| 49 | #define ID_BLOCK0xa1 0xa1 |
| 50 | #define ID_BLOCK_ADDITIONS0x75a1 0x75a1 |
| 51 | #define ID_BLOCK_DURATION0x9b 0x9b |
| 52 | #define ID_REFERENCE_BLOCK0xfb 0xfb |
| 53 | #define ID_DISCARD_PADDING0x75a2 0x75a2 |
| 54 | |
| 55 | /* BlockAdditions Elements */ |
| 56 | #define ID_BLOCK_MORE0xa6 0xa6 |
| 57 | |
| 58 | /* BlockMore Elements */ |
| 59 | #define ID_BLOCK_ADD_ID0xee 0xee |
| 60 | #define ID_BLOCK_ADDITIONAL0xa5 0xa5 |
| 61 | |
| 62 | /* Tracks Elements */ |
| 63 | #define ID_TRACKS0x1654ae6b 0x1654ae6b |
| 64 | #define ID_TRACK_ENTRY0xae 0xae |
| 65 | #define ID_TRACK_NUMBER0xd7 0xd7 |
| 66 | #define ID_TRACK_UID0x73c5 0x73c5 |
| 67 | #define ID_TRACK_TYPE0x83 0x83 |
| 68 | #define ID_FLAG_ENABLED0xb9 0xb9 |
| 69 | #define ID_FLAG_DEFAULT0x88 0x88 |
| 70 | #define ID_FLAG_LACING0x9c 0x9c |
| 71 | #define ID_TRACK_TIMECODE_SCALE0x23314f 0x23314f |
| 72 | #define ID_LANGUAGE0x22b59c 0x22b59c |
| 73 | #define ID_CODEC_ID0x86 0x86 |
| 74 | #define ID_CODEC_PRIVATE0x63a2 0x63a2 |
| 75 | #define ID_CODEC_DELAY0x56aa 0x56aa |
| 76 | #define ID_SEEK_PREROLL0x56bb 0x56bb |
| 77 | #define ID_DEFAULT_DURATION0x23e383 0x23e383 |
| 78 | |
| 79 | /* Video Elements */ |
| 80 | #define ID_VIDEO0xe0 0xe0 |
| 81 | #define ID_STEREO_MODE0x53b8 0x53b8 |
| 82 | #define ID_ALPHA_MODE0x53c0 0x53c0 |
| 83 | #define ID_PIXEL_WIDTH0xb0 0xb0 |
| 84 | #define ID_PIXEL_HEIGHT0xba 0xba |
| 85 | #define ID_PIXEL_CROP_BOTTOM0x54aa 0x54aa |
| 86 | #define ID_PIXEL_CROP_TOP0x54bb 0x54bb |
| 87 | #define ID_PIXEL_CROP_LEFT0x54cc 0x54cc |
| 88 | #define ID_PIXEL_CROP_RIGHT0x54dd 0x54dd |
| 89 | #define ID_DISPLAY_WIDTH0x54b0 0x54b0 |
| 90 | #define ID_DISPLAY_HEIGHT0x54ba 0x54ba |
| 91 | #define ID_COLOUR0x55b0 0x55b0 |
| 92 | #define ID_PROJECTION0x7670 0x7670 |
| 93 | |
| 94 | /* Audio Elements */ |
| 95 | #define ID_AUDIO0xe1 0xe1 |
| 96 | #define ID_SAMPLING_FREQUENCY0xb5 0xb5 |
| 97 | #define ID_CHANNELS0x9f 0x9f |
| 98 | #define ID_BIT_DEPTH0x6264 0x6264 |
| 99 | |
| 100 | /* Cues Elements */ |
| 101 | #define ID_CUES0x1c53bb6b 0x1c53bb6b |
| 102 | #define ID_CUE_POINT0xbb 0xbb |
| 103 | #define ID_CUE_TIME0xb3 0xb3 |
| 104 | #define ID_CUE_TRACK_POSITIONS0xb7 0xb7 |
| 105 | #define ID_CUE_TRACK0xf7 0xf7 |
| 106 | #define ID_CUE_CLUSTER_POSITION0xf1 0xf1 |
| 107 | #define ID_CUE_BLOCK_NUMBER0x5378 0x5378 |
| 108 | |
| 109 | /* Encoding Elements */ |
| 110 | #define ID_CONTENT_ENCODINGS0x6d80 0x6d80 |
| 111 | #define ID_CONTENT_ENCODING0x6240 0x6240 |
| 112 | #define ID_CONTENT_ENCODING_TYPE0x5033 0x5033 |
| 113 | |
| 114 | /* Encryption Elements */ |
| 115 | #define ID_CONTENT_ENCRYPTION0x5035 0x5035 |
| 116 | #define ID_CONTENT_ENC_ALGO0x47e1 0x47e1 |
| 117 | #define ID_CONTENT_ENC_KEY_ID0x47e2 0x47e2 |
| 118 | #define ID_CONTENT_ENC_AES_SETTINGS0x47e7 0x47e7 |
| 119 | #define ID_AES_SETTINGS_CIPHER_MODE0x47e8 0x47e8 |
| 120 | |
| 121 | /* Colour Elements */ |
| 122 | #define ID_MATRIX_COEFFICIENTS0x55b1 0x55b1 |
| 123 | #define ID_RANGE0x55b9 0x55b9 |
| 124 | #define ID_TRANSFER_CHARACTERISTICS0x55ba 0x55ba |
| 125 | #define ID_PRIMARIES0x55bb 0x55bb |
| 126 | #define ID_MAX_CLL0x55bc 0x55bc |
| 127 | #define ID_MAX_FALL0x55bd 0x55bd |
| 128 | #define ID_MASTERING_METADATA0x55d0 0x55d0 |
| 129 | |
| 130 | /* MasteringMetadata Elements */ |
| 131 | #define ID_PRIMARY_R_CHROMATICITY_X0x55d1 0x55d1 |
| 132 | #define ID_PRIMARY_R_CHROMATICITY_Y0x55d2 0x55d2 |
| 133 | #define ID_PRIMARY_G_CHROMATICITY_X0x55d3 0x55d3 |
| 134 | #define ID_PRIMARY_G_CHROMATICITY_Y0x55d4 0x55d4 |
| 135 | #define ID_PRIMARY_B_CHROMATICITY_X0x55d5 0x55d5 |
| 136 | #define ID_PRIMARY_B_CHROMATICITY_Y0x55d6 0x55d6 |
| 137 | #define ID_WHITE_POINT_CHROMATICITY_X0x55d7 0x55d7 |
| 138 | #define ID_WHITE_POINT_CHROMATICITY_Y0x55d8 0x55d8 |
| 139 | #define ID_LUMINANCE_MAX0x55d9 0x55d9 |
| 140 | #define ID_LUMINANCE_MIN0x55da 0x55da |
| 141 | |
| 142 | /* Projection Elements */ |
| 143 | #define ID_PROJECTION_TYPE0x7671 0x7671 |
| 144 | #define ID_PROJECTION_POSE_YAW0x7673 0x7673 |
| 145 | #define ID_PROJECTION_POSE_PITCH0x7674 0x7674 |
| 146 | #define ID_PROJECTION_POSE_ROLL0x7675 0x7675 |
| 147 | |
| 148 | /* Other Elements */ |
| 149 | #define ID_CHAPTERS0x1043a770 0x1043a770 |
| 150 | #define ID_ATTACHMENTS0x1941a469 0x1941a469 |
| 151 | #define ID_TAGS0x1254c367 0x1254c367 |
| 152 | |
| 153 | /* EBML Types */ |
| 154 | enum ebml_type_enum { |
| 155 | TYPE_UNKNOWN, |
| 156 | TYPE_MASTER, |
| 157 | TYPE_UINT, |
| 158 | TYPE_FLOAT, |
| 159 | TYPE_STRING, |
| 160 | TYPE_BINARY |
| 161 | }; |
| 162 | |
| 163 | /* Read state of an element's storage. EBML_READ_DEFAULT is established |
| 164 | before parsing for elements with a schema-declared default, so it does not |
| 165 | mean the element was present in the file. EBML_READ_EMPTY marks an element |
| 166 | that was present with a zero length payload but whose default only the |
| 167 | accessor can supply: it counts as read, but holds no value. */ |
| 168 | enum ebml_read_state { |
| 169 | EBML_UNREAD = 0, |
| 170 | EBML_READ_VALUE, |
| 171 | EBML_READ_DEFAULT, |
| 172 | EBML_READ_EMPTY |
| 173 | }; |
| 174 | |
| 175 | #define LIMIT_STRING(1 << 20) (1 << 20) |
| 176 | #define LIMIT_BINARY(1 << 24) (1 << 24) |
| 177 | #define LIMIT_BLOCK(1 << 30) (1 << 30) |
| 178 | #define LIMIT_FRAME(1 << 28) (1 << 28) |
| 179 | #define LIMIT_TRACKS1000U 1000U |
| 180 | #define IO_BUFFER_SIZE8192 8192 |
| 181 | |
| 182 | /* Field Flags */ |
| 183 | #define DESC_FLAG_NONE0 0 |
| 184 | #define DESC_FLAG_MULTI(1 << 0) (1 << 0) |
| 185 | #define DESC_FLAG_SUSPEND(1 << 1) (1 << 1) |
| 186 | #define DESC_FLAG_OFFSET(1 << 2) (1 << 2) |
| 187 | #define DESC_FLAG_HAS_DEFAULT(1 << 3) (1 << 3) |
| 188 | #define DESC_FLAG_ACCESSOR_DEFAULT(1 << 4) (1 << 4) |
| 189 | |
| 190 | /* Block Header Flags */ |
| 191 | #define SIMPLE_BLOCK_FLAGS_KEYFRAME(1 << 7) (1 << 7) |
| 192 | #define BLOCK_FLAGS_LACING6 6 |
| 193 | |
| 194 | /* Lacing Constants */ |
| 195 | #define LACING_NONE0 0 |
| 196 | #define LACING_XIPH1 1 |
| 197 | #define LACING_FIXED2 2 |
| 198 | #define LACING_EBML3 3 |
| 199 | |
| 200 | /* Track Types */ |
| 201 | #define TRACK_TYPE_VIDEO1 1 |
| 202 | #define TRACK_TYPE_AUDIO2 2 |
| 203 | |
| 204 | /* Track IDs */ |
| 205 | #define TRACK_ID_VP8"V_VP8" "V_VP8" |
| 206 | #define TRACK_ID_VP9"V_VP9" "V_VP9" |
| 207 | #define TRACK_ID_AV1"V_AV1" "V_AV1" |
| 208 | #define TRACK_ID_VORBIS"A_VORBIS" "A_VORBIS" |
| 209 | #define TRACK_ID_OPUS"A_OPUS" "A_OPUS" |
| 210 | #define TRACK_ID_AVC"V_MPEG4/ISO/AVC" "V_MPEG4/ISO/AVC" |
| 211 | #define TRACK_ID_HEVC"V_MPEGH/ISO/HEVC" "V_MPEGH/ISO/HEVC" |
| 212 | #define TRACK_ID_AAC"A_AAC" "A_AAC" |
| 213 | #define TRACK_ID_AAC_MP4_LC"A_AAC/MPEG4/LC" "A_AAC/MPEG4/LC" |
| 214 | #define TRACK_ID_AAC_MP4_LC_SBR"A_AAC/MPEG4/LC/SBR" "A_AAC/MPEG4/LC/SBR" |
| 215 | #define TRACK_ID_AAC_MP4_LTP"A_AAC/MPEG4/LTP" "A_AAC/MPEG4/LTP" |
| 216 | #define TRACK_ID_AAC_MP4_MAIN"A_AAC/MPEG4/MAIN" "A_AAC/MPEG4/MAIN" |
| 217 | #define TRACK_ID_AAC_MP4_SSR"A_AAC/MPEG4/SSR" "A_AAC/MPEG4/SSR" |
| 218 | #define TRACK_ID_FLAC"A_FLAC" "A_FLAC" |
| 219 | #define TRACK_ID_MP3"A_MPEG/L3" "A_MPEG/L3" |
| 220 | #define TRACK_ID_PCM_FLOAT"A_PCM/FLOAT/IEEE" "A_PCM/FLOAT/IEEE" |
| 221 | #define TRACK_ID_PCM_INT_BE"A_PCM/INT/BIG" "A_PCM/INT/BIG" |
| 222 | #define TRACK_ID_PCM_INT_LE"A_PCM/INT/LIT" "A_PCM/INT/LIT" |
| 223 | |
| 224 | /* Track Encryption */ |
| 225 | #define CONTENT_ENC_ALGO_AES5 5 |
| 226 | #define AES_SETTINGS_CIPHER_CTR1 1 |
| 227 | |
| 228 | /* Packet Encryption */ |
| 229 | #define SIGNAL_BYTE_SIZE1 1 |
| 230 | #define IV_SIZE8 8 |
| 231 | #define NUM_PACKETS_SIZE1 1 |
| 232 | #define PACKET_OFFSET_SIZE4 4 |
| 233 | |
| 234 | /* Signal Byte */ |
| 235 | #define PACKET_ENCRYPTED1 1 |
| 236 | #define ENCRYPTED_BIT_MASK(1 << 0) (1 << 0) |
| 237 | |
| 238 | #define PACKET_PARTITIONED2 2 |
| 239 | #define PARTITIONED_BIT_MASK(1 << 1) (1 << 1) |
| 240 | |
| 241 | enum vint_mask { |
| 242 | MASK_NONE, |
| 243 | MASK_FIRST_BIT |
| 244 | }; |
| 245 | |
| 246 | struct ebml_binary { |
| 247 | unsigned char * data; |
| 248 | size_t length; |
| 249 | }; |
| 250 | |
| 251 | struct ebml_list_node { |
| 252 | struct ebml_list_node * next; |
| 253 | uint64_t id; |
| 254 | void * data; |
| 255 | }; |
| 256 | |
| 257 | struct ebml_list { |
| 258 | struct ebml_list_node * head; |
| 259 | struct ebml_list_node * tail; |
| 260 | size_t count; |
| 261 | }; |
| 262 | |
| 263 | struct ebml_type { |
| 264 | union ebml_value { |
| 265 | uint64_t u; |
| 266 | double f; |
| 267 | int64_t i; |
| 268 | char * s; |
| 269 | struct ebml_binary b; |
| 270 | } v; |
| 271 | enum ebml_type_enum type; |
| 272 | enum ebml_read_state read; |
| 273 | }; |
| 274 | |
| 275 | /* EBML Definitions */ |
| 276 | struct ebml { |
| 277 | struct ebml_type ebml_version; |
| 278 | struct ebml_type ebml_read_version; |
| 279 | struct ebml_type ebml_max_id_length; |
| 280 | struct ebml_type ebml_max_size_length; |
| 281 | struct ebml_type doctype; |
| 282 | struct ebml_type doctype_version; |
| 283 | struct ebml_type doctype_read_version; |
| 284 | }; |
| 285 | |
| 286 | #define DOCTYPE_WEBM"webm" "webm" |
| 287 | #define DOCTYPE_MKV"matroska" "matroska" |
| 288 | |
| 289 | /* Matroksa Definitions */ |
| 290 | struct seek { |
| 291 | struct ebml_type id; |
| 292 | struct ebml_type position; |
| 293 | }; |
| 294 | |
| 295 | struct seek_head { |
| 296 | struct ebml_list seek; |
| 297 | }; |
| 298 | |
| 299 | struct info { |
| 300 | struct ebml_type timecode_scale; |
| 301 | struct ebml_type duration; |
| 302 | }; |
| 303 | |
| 304 | struct mastering_metadata { |
| 305 | struct ebml_type primary_r_chromacity_x; |
| 306 | struct ebml_type primary_r_chromacity_y; |
| 307 | struct ebml_type primary_g_chromacity_x; |
| 308 | struct ebml_type primary_g_chromacity_y; |
| 309 | struct ebml_type primary_b_chromacity_x; |
| 310 | struct ebml_type primary_b_chromacity_y; |
| 311 | struct ebml_type white_point_chromaticity_x; |
| 312 | struct ebml_type white_point_chromaticity_y; |
| 313 | struct ebml_type luminance_max; |
| 314 | struct ebml_type luminance_min; |
| 315 | }; |
| 316 | |
| 317 | struct colour { |
| 318 | struct ebml_type matrix_coefficients; |
| 319 | struct ebml_type range; |
| 320 | struct ebml_type transfer_characteristics; |
| 321 | struct ebml_type primaries; |
| 322 | struct ebml_type max_cll; |
| 323 | struct ebml_type max_fall; |
| 324 | struct mastering_metadata mastering_metadata; |
| 325 | }; |
| 326 | |
| 327 | struct projection { |
| 328 | struct ebml_type type; |
| 329 | struct ebml_type pose_yaw; |
| 330 | struct ebml_type pose_pitch; |
| 331 | struct ebml_type pose_roll; |
| 332 | }; |
| 333 | |
| 334 | struct video { |
| 335 | struct ebml_type stereo_mode; |
| 336 | struct ebml_type alpha_mode; |
| 337 | struct ebml_type pixel_width; |
| 338 | struct ebml_type pixel_height; |
| 339 | struct ebml_type pixel_crop_bottom; |
| 340 | struct ebml_type pixel_crop_top; |
| 341 | struct ebml_type pixel_crop_left; |
| 342 | struct ebml_type pixel_crop_right; |
| 343 | struct ebml_type display_width; |
| 344 | struct ebml_type display_height; |
| 345 | struct colour colour; |
| 346 | struct projection projection; |
| 347 | }; |
| 348 | |
| 349 | struct audio { |
| 350 | struct ebml_type sampling_frequency; |
| 351 | struct ebml_type channels; |
| 352 | struct ebml_type bit_depth; |
| 353 | }; |
| 354 | |
| 355 | struct content_enc_aes_settings { |
| 356 | struct ebml_type aes_settings_cipher_mode; |
| 357 | }; |
| 358 | |
| 359 | struct content_encryption { |
| 360 | struct ebml_type content_enc_algo; |
| 361 | struct ebml_type content_enc_key_id; |
| 362 | struct ebml_list content_enc_aes_settings; |
| 363 | }; |
| 364 | |
| 365 | struct content_encoding { |
| 366 | struct ebml_type content_encoding_type; |
| 367 | struct ebml_list content_encryption; |
| 368 | }; |
| 369 | |
| 370 | struct content_encodings { |
| 371 | struct ebml_list content_encoding; |
| 372 | }; |
| 373 | |
| 374 | struct track_entry { |
| 375 | struct ebml_type number; |
| 376 | struct ebml_type uid; |
| 377 | struct ebml_type type; |
| 378 | struct ebml_type flag_enabled; |
| 379 | struct ebml_type flag_default; |
| 380 | struct ebml_type flag_lacing; |
| 381 | struct ebml_type track_timecode_scale; |
| 382 | struct ebml_type language; |
| 383 | struct ebml_type codec_id; |
| 384 | struct ebml_type codec_private; |
| 385 | struct ebml_type codec_delay; |
| 386 | struct ebml_type seek_preroll; |
| 387 | struct ebml_type default_duration; |
| 388 | struct video video; |
| 389 | struct audio audio; |
| 390 | struct content_encodings content_encodings; |
| 391 | }; |
| 392 | |
| 393 | struct tracks { |
| 394 | struct ebml_list track_entry; |
| 395 | }; |
| 396 | |
| 397 | struct track_number_index { |
| 398 | uint64_t number; |
| 399 | unsigned int index; |
| 400 | }; |
| 401 | |
| 402 | struct cue_track_positions { |
| 403 | struct ebml_type track; |
| 404 | struct ebml_type cluster_position; |
| 405 | struct ebml_type block_number; |
| 406 | }; |
| 407 | |
| 408 | struct cue_point { |
| 409 | struct ebml_type time; |
| 410 | struct ebml_list cue_track_positions; |
| 411 | }; |
| 412 | |
| 413 | struct cues { |
| 414 | struct ebml_list cue_point; |
| 415 | }; |
| 416 | |
| 417 | struct segment { |
| 418 | struct ebml_list seek_head; |
| 419 | struct info info; |
| 420 | struct tracks tracks; |
| 421 | struct cues cues; |
| 422 | }; |
| 423 | |
| 424 | /* Misc. */ |
| 425 | struct pool_node { |
| 426 | struct pool_node * next; |
| 427 | void * data; |
| 428 | }; |
| 429 | |
| 430 | struct pool_ctx { |
| 431 | struct pool_node * head; |
| 432 | }; |
| 433 | |
| 434 | struct list_node { |
| 435 | struct list_node * previous; |
| 436 | struct ebml_element_desc * node; |
| 437 | unsigned char * data; |
| 438 | }; |
| 439 | |
| 440 | struct saved_state { |
| 441 | int64_t stream_offset; |
| 442 | uint64_t last_id; |
| 443 | uint64_t last_size; |
| 444 | int last_valid; |
| 445 | }; |
| 446 | |
| 447 | struct frame_encryption { |
| 448 | unsigned char * iv; |
| 449 | size_t length; |
| 450 | uint8_t signal_byte; |
| 451 | uint8_t num_partitions; |
| 452 | uint32_t * partition_offsets; |
| 453 | }; |
| 454 | |
| 455 | struct frame { |
| 456 | unsigned char * data; |
| 457 | size_t length; |
| 458 | struct frame_encryption * frame_encryption; |
| 459 | }; |
| 460 | |
| 461 | struct block_additional { |
| 462 | unsigned int id; |
| 463 | unsigned char * data; |
| 464 | size_t length; |
| 465 | struct block_additional * next; |
| 466 | }; |
| 467 | |
| 468 | /* Internal I/O wrapper. */ |
| 469 | typedef struct { |
| 470 | nestegg_io * io; |
| 471 | unsigned char buf[IO_BUFFER_SIZE8192]; |
| 472 | size_t buf_offset; |
| 473 | size_t buf_fill; |
| 474 | int64_t max_offset; /* <= 0: no limit */ |
| 475 | int poisoned; /* logical position is unknown until a successful seek */ |
| 476 | } ne_io; |
| 477 | |
| 478 | /* Public (opaque) Structures */ |
| 479 | struct nestegg { |
| 480 | ne_io io; |
| 481 | nestegg_log log; |
| 482 | struct pool_ctx * alloc_pool; |
| 483 | uint64_t last_id; |
| 484 | uint64_t last_size; |
| 485 | int last_valid; |
| 486 | struct list_node * ancestor; |
| 487 | struct ebml ebml; |
| 488 | struct segment segment; |
| 489 | int64_t segment_offset; |
| 490 | struct track_entry ** track_by_index; |
| 491 | struct track_number_index * track_by_number; |
| 492 | unsigned int track_count; |
| 493 | /* Last read cluster. */ |
| 494 | uint64_t cluster_timecode; |
| 495 | int read_cluster_timecode; |
| 496 | struct saved_state saved; |
| 497 | }; |
| 498 | |
| 499 | struct nestegg_packet { |
| 500 | uint64_t track; |
| 501 | uint64_t timecode; |
| 502 | uint64_t duration; |
| 503 | int read_duration; |
| 504 | struct frame ** frames; |
| 505 | unsigned int frame_count; |
| 506 | struct block_additional * block_additional; |
| 507 | int64_t discard_padding; |
| 508 | int read_discard_padding; |
| 509 | int64_t reference_block; |
| 510 | int read_reference_block; |
| 511 | uint8_t keyframe; |
| 512 | int64_t end_offset; |
| 513 | }; |
| 514 | |
| 515 | /* Element Descriptor */ |
| 516 | struct ebml_element_desc { |
Excessive padding in 'struct ebml_element_desc' (8 padding bytes, where 0 is optimal). Optimal fields order: name, id, offset, children, size, data_offset, default_uint, default_float, type, flags, consider reordering the fields or adding explicit padding members | |
| 517 | char const * name; |
| 518 | uint64_t id; |
| 519 | enum ebml_type_enum type; |
| 520 | size_t offset; |
| 521 | unsigned int flags; |
| 522 | struct ebml_element_desc * children; |
| 523 | size_t size; |
| 524 | size_t data_offset; |
| 525 | /* Schema-declared default value, valid if DESC_FLAG_HAS_DEFAULT is set. |
| 526 | Stored as two scalars rather than a union to allow static |
| 527 | initialization in C89. An element whose default can't be expressed |
| 528 | here instead carries DESC_FLAG_ACCESSOR_DEFAULT and is resolved by the |
| 529 | accessor. */ |
| 530 | uint64_t default_uint; |
| 531 | double default_float; |
| 532 | }; |
| 533 | |
| 534 | #define E_FIELD(ID, TYPE, STRUCT, FIELD) \ |
| 535 | { #ID, ID, TYPE, offsetof(STRUCT, FIELD)__builtin_offsetof(STRUCT, FIELD), DESC_FLAG_NONE0, NULL((void*)0), 0, 0, 0, 0.0 } |
| 536 | #define E_FIELD_DEFAULT_UINT(ID, STRUCT, FIELD, DEFAULT) \ |
| 537 | { #ID, ID, TYPE_UINT, offsetof(STRUCT, FIELD)__builtin_offsetof(STRUCT, FIELD), DESC_FLAG_HAS_DEFAULT(1 << 3), NULL((void*)0), 0, 0, DEFAULT, 0.0 } |
| 538 | #define E_FIELD_DEFAULT_FLOAT(ID, STRUCT, FIELD, DEFAULT) \ |
| 539 | { #ID, ID, TYPE_FLOAT, offsetof(STRUCT, FIELD)__builtin_offsetof(STRUCT, FIELD), DESC_FLAG_HAS_DEFAULT(1 << 3), NULL((void*)0), 0, 0, 0, DEFAULT } |
| 540 | #define E_FIELD_ACCESSOR_DEFAULT(ID, TYPE, STRUCT, FIELD) \ |
| 541 | { #ID, ID, TYPE, offsetof(STRUCT, FIELD)__builtin_offsetof(STRUCT, FIELD), DESC_FLAG_ACCESSOR_DEFAULT(1 << 4), NULL((void*)0), 0, 0, 0, 0.0 } |
| 542 | #define E_MASTER(ID, TYPE, STRUCT, FIELD) \ |
| 543 | { #ID, ID, TYPE, offsetof(STRUCT, FIELD)__builtin_offsetof(STRUCT, FIELD), DESC_FLAG_MULTI(1 << 0), ne_ ## FIELD ## _elements, \ |
| 544 | sizeof(struct FIELD), 0, 0, 0.0 } |
| 545 | #define E_SINGLE_MASTER_O(ID, TYPE, STRUCT, FIELD) \ |
| 546 | { #ID, ID, TYPE, offsetof(STRUCT, FIELD)__builtin_offsetof(STRUCT, FIELD), DESC_FLAG_OFFSET(1 << 2), ne_ ## FIELD ## _elements, 0, \ |
| 547 | offsetof(STRUCT, FIELD ## _offset)__builtin_offsetof(STRUCT, FIELD ## _offset), 0, 0.0 } |
| 548 | #define E_SINGLE_MASTER(ID, TYPE, STRUCT, FIELD) \ |
| 549 | { #ID, ID, TYPE, offsetof(STRUCT, FIELD)__builtin_offsetof(STRUCT, FIELD), DESC_FLAG_NONE0, ne_ ## FIELD ## _elements, 0, 0, 0, 0.0 } |
| 550 | #define E_SUSPEND(ID, TYPE) \ |
| 551 | { #ID, ID, TYPE, 0, DESC_FLAG_SUSPEND(1 << 1), NULL((void*)0), 0, 0, 0, 0.0 } |
| 552 | #define E_LAST \ |
| 553 | { NULL((void*)0), 0, 0, 0, DESC_FLAG_NONE0, NULL((void*)0), 0, 0, 0, 0.0 } |
| 554 | |
| 555 | /* EBML Element Lists */ |
| 556 | static struct ebml_element_desc ne_ebml_elements[] = { |
| 557 | E_FIELD_DEFAULT_UINT(ID_EBML_VERSION0x4286, struct ebml, ebml_version, 1), |
| 558 | E_FIELD_DEFAULT_UINT(ID_EBML_READ_VERSION0x42f7, struct ebml, ebml_read_version, 1), |
| 559 | E_FIELD_DEFAULT_UINT(ID_EBML_MAX_ID_LENGTH0x42f2, struct ebml, ebml_max_id_length, 4), |
| 560 | E_FIELD_DEFAULT_UINT(ID_EBML_MAX_SIZE_LENGTH0x42f3, struct ebml, ebml_max_size_length, 8), |
| 561 | E_FIELD(ID_DOCTYPE0x4282, TYPE_STRING, struct ebml, doctype), |
| 562 | E_FIELD_DEFAULT_UINT(ID_DOCTYPE_VERSION0x4287, struct ebml, doctype_version, 1), |
| 563 | E_FIELD_DEFAULT_UINT(ID_DOCTYPE_READ_VERSION0x4285, struct ebml, doctype_read_version, 1), |
| 564 | E_LAST |
| 565 | }; |
| 566 | |
| 567 | /* WebM Element Lists */ |
| 568 | static struct ebml_element_desc ne_seek_elements[] = { |
| 569 | E_FIELD(ID_SEEK_ID0x53ab, TYPE_BINARY, struct seek, id), |
| 570 | E_FIELD(ID_SEEK_POSITION0x53ac, TYPE_UINT, struct seek, position), |
| 571 | E_LAST |
| 572 | }; |
| 573 | |
| 574 | static struct ebml_element_desc ne_seek_head_elements[] = { |
| 575 | E_MASTER(ID_SEEK0x4dbb, TYPE_MASTER, struct seek_head, seek), |
| 576 | E_LAST |
| 577 | }; |
| 578 | |
| 579 | static struct ebml_element_desc ne_info_elements[] = { |
| 580 | E_FIELD_DEFAULT_UINT(ID_TIMECODE_SCALE0x2ad7b1, struct info, timecode_scale, 1000000), |
| 581 | E_FIELD(ID_DURATION0x4489, TYPE_FLOAT, struct info, duration), |
| 582 | E_LAST |
| 583 | }; |
| 584 | |
| 585 | static struct ebml_element_desc ne_mastering_metadata_elements[] = { |
| 586 | E_FIELD(ID_PRIMARY_R_CHROMATICITY_X0x55d1, TYPE_FLOAT, struct mastering_metadata, primary_r_chromacity_x), |
| 587 | E_FIELD(ID_PRIMARY_R_CHROMATICITY_Y0x55d2, TYPE_FLOAT, struct mastering_metadata, primary_r_chromacity_y), |
| 588 | E_FIELD(ID_PRIMARY_G_CHROMATICITY_X0x55d3, TYPE_FLOAT, struct mastering_metadata, primary_g_chromacity_x), |
| 589 | E_FIELD(ID_PRIMARY_G_CHROMATICITY_Y0x55d4, TYPE_FLOAT, struct mastering_metadata, primary_g_chromacity_y), |
| 590 | E_FIELD(ID_PRIMARY_B_CHROMATICITY_X0x55d5, TYPE_FLOAT, struct mastering_metadata, primary_b_chromacity_x), |
| 591 | E_FIELD(ID_PRIMARY_B_CHROMATICITY_Y0x55d6, TYPE_FLOAT, struct mastering_metadata, primary_b_chromacity_y), |
| 592 | E_FIELD(ID_WHITE_POINT_CHROMATICITY_X0x55d7, TYPE_FLOAT, struct mastering_metadata, white_point_chromaticity_x), |
| 593 | E_FIELD(ID_WHITE_POINT_CHROMATICITY_Y0x55d8, TYPE_FLOAT, struct mastering_metadata, white_point_chromaticity_y), |
| 594 | E_FIELD(ID_LUMINANCE_MAX0x55d9, TYPE_FLOAT, struct mastering_metadata, luminance_max), |
| 595 | E_FIELD(ID_LUMINANCE_MIN0x55da, TYPE_FLOAT, struct mastering_metadata, luminance_min), |
| 596 | E_LAST |
| 597 | }; |
| 598 | |
| 599 | static struct ebml_element_desc ne_colour_elements[] = { |
| 600 | E_FIELD_DEFAULT_UINT(ID_MATRIX_COEFFICIENTS0x55b1, struct colour, matrix_coefficients, 2), |
| 601 | E_FIELD_DEFAULT_UINT(ID_RANGE0x55b9, struct colour, range, 0), |
| 602 | E_FIELD_DEFAULT_UINT(ID_TRANSFER_CHARACTERISTICS0x55ba, struct colour, transfer_characteristics, 2), |
| 603 | E_FIELD_DEFAULT_UINT(ID_PRIMARIES0x55bb, struct colour, primaries, 2), |
| 604 | E_FIELD(ID_MAX_CLL0x55bc, TYPE_UINT, struct colour, max_cll), |
| 605 | E_FIELD(ID_MAX_FALL0x55bd, TYPE_UINT, struct colour, max_fall), |
| 606 | E_SINGLE_MASTER(ID_MASTERING_METADATA0x55d0, TYPE_MASTER, struct colour, mastering_metadata), |
| 607 | E_LAST |
| 608 | }; |
| 609 | |
| 610 | static struct ebml_element_desc ne_projection_elements[] = { |
| 611 | E_FIELD_DEFAULT_UINT(ID_PROJECTION_TYPE0x7671, struct projection, type, 0), |
| 612 | E_FIELD_DEFAULT_FLOAT(ID_PROJECTION_POSE_YAW0x7673, struct projection, pose_yaw, 0.0), |
| 613 | E_FIELD_DEFAULT_FLOAT(ID_PROJECTION_POSE_PITCH0x7674, struct projection, pose_pitch, 0.0), |
| 614 | E_FIELD_DEFAULT_FLOAT(ID_PROJECTION_POSE_ROLL0x7675, struct projection, pose_roll, 0.0), |
| 615 | E_LAST |
| 616 | }; |
| 617 | |
| 618 | static struct ebml_element_desc ne_video_elements[] = { |
| 619 | E_FIELD_DEFAULT_UINT(ID_STEREO_MODE0x53b8, struct video, stereo_mode, 0), |
| 620 | E_FIELD_DEFAULT_UINT(ID_ALPHA_MODE0x53c0, struct video, alpha_mode, 0), |
| 621 | E_FIELD(ID_PIXEL_WIDTH0xb0, TYPE_UINT, struct video, pixel_width), |
| 622 | E_FIELD(ID_PIXEL_HEIGHT0xba, TYPE_UINT, struct video, pixel_height), |
| 623 | E_FIELD_DEFAULT_UINT(ID_PIXEL_CROP_BOTTOM0x54aa, struct video, pixel_crop_bottom, 0), |
| 624 | E_FIELD_DEFAULT_UINT(ID_PIXEL_CROP_TOP0x54bb, struct video, pixel_crop_top, 0), |
| 625 | E_FIELD_DEFAULT_UINT(ID_PIXEL_CROP_LEFT0x54cc, struct video, pixel_crop_left, 0), |
| 626 | E_FIELD_DEFAULT_UINT(ID_PIXEL_CROP_RIGHT0x54dd, struct video, pixel_crop_right, 0), |
| 627 | E_FIELD_ACCESSOR_DEFAULT(ID_DISPLAY_WIDTH0x54b0, TYPE_UINT, struct video, display_width), |
| 628 | E_FIELD_ACCESSOR_DEFAULT(ID_DISPLAY_HEIGHT0x54ba, TYPE_UINT, struct video, display_height), |
| 629 | E_SINGLE_MASTER(ID_COLOUR0x55b0, TYPE_MASTER, struct video, colour), |
| 630 | E_SINGLE_MASTER(ID_PROJECTION0x7670, TYPE_MASTER, struct video, projection), |
| 631 | E_LAST |
| 632 | }; |
| 633 | |
| 634 | static struct ebml_element_desc ne_audio_elements[] = { |
| 635 | E_FIELD_DEFAULT_FLOAT(ID_SAMPLING_FREQUENCY0xb5, struct audio, sampling_frequency, 8000.0), |
| 636 | E_FIELD_DEFAULT_UINT(ID_CHANNELS0x9f, struct audio, channels, 1), |
| 637 | E_FIELD_ACCESSOR_DEFAULT(ID_BIT_DEPTH0x6264, TYPE_UINT, struct audio, bit_depth), |
| 638 | E_LAST |
| 639 | }; |
| 640 | |
| 641 | static struct ebml_element_desc ne_content_enc_aes_settings_elements[] = { |
| 642 | E_FIELD(ID_AES_SETTINGS_CIPHER_MODE0x47e8, TYPE_UINT, struct content_enc_aes_settings, aes_settings_cipher_mode), |
| 643 | E_LAST |
| 644 | }; |
| 645 | |
| 646 | static struct ebml_element_desc ne_content_encryption_elements[] = { |
| 647 | E_FIELD_DEFAULT_UINT(ID_CONTENT_ENC_ALGO0x47e1, struct content_encryption, content_enc_algo, 0), |
| 648 | E_FIELD(ID_CONTENT_ENC_KEY_ID0x47e2, TYPE_BINARY, struct content_encryption, content_enc_key_id), |
| 649 | E_MASTER(ID_CONTENT_ENC_AES_SETTINGS0x47e7, TYPE_MASTER, struct content_encryption, content_enc_aes_settings), |
| 650 | E_LAST |
| 651 | }; |
| 652 | |
| 653 | static struct ebml_element_desc ne_content_encoding_elements[] = { |
| 654 | E_FIELD_DEFAULT_UINT(ID_CONTENT_ENCODING_TYPE0x5033, struct content_encoding, content_encoding_type, 0), |
| 655 | E_MASTER(ID_CONTENT_ENCRYPTION0x5035, TYPE_MASTER, struct content_encoding, content_encryption), |
| 656 | E_LAST |
| 657 | }; |
| 658 | |
| 659 | static struct ebml_element_desc ne_content_encodings_elements[] = { |
| 660 | E_MASTER(ID_CONTENT_ENCODING0x6240, TYPE_MASTER, struct content_encodings, content_encoding), |
| 661 | E_LAST |
| 662 | }; |
| 663 | |
| 664 | static struct ebml_element_desc ne_track_entry_elements[] = { |
| 665 | E_FIELD(ID_TRACK_NUMBER0xd7, TYPE_UINT, struct track_entry, number), |
| 666 | E_FIELD(ID_TRACK_UID0x73c5, TYPE_UINT, struct track_entry, uid), |
| 667 | E_FIELD(ID_TRACK_TYPE0x83, TYPE_UINT, struct track_entry, type), |
| 668 | E_FIELD_DEFAULT_UINT(ID_FLAG_ENABLED0xb9, struct track_entry, flag_enabled, 1), |
| 669 | E_FIELD_DEFAULT_UINT(ID_FLAG_DEFAULT0x88, struct track_entry, flag_default, 1), |
| 670 | E_FIELD_DEFAULT_UINT(ID_FLAG_LACING0x9c, struct track_entry, flag_lacing, 1), |
| 671 | E_FIELD_DEFAULT_FLOAT(ID_TRACK_TIMECODE_SCALE0x23314f, struct track_entry, track_timecode_scale, 1.0), |
| 672 | E_FIELD(ID_LANGUAGE0x22b59c, TYPE_STRING, struct track_entry, language), |
| 673 | E_FIELD(ID_CODEC_ID0x86, TYPE_STRING, struct track_entry, codec_id), |
| 674 | E_FIELD(ID_CODEC_PRIVATE0x63a2, TYPE_BINARY, struct track_entry, codec_private), |
| 675 | E_FIELD_DEFAULT_UINT(ID_CODEC_DELAY0x56aa, struct track_entry, codec_delay, 0), |
| 676 | E_FIELD_DEFAULT_UINT(ID_SEEK_PREROLL0x56bb, struct track_entry, seek_preroll, 0), |
| 677 | E_FIELD(ID_DEFAULT_DURATION0x23e383, TYPE_UINT, struct track_entry, default_duration), |
| 678 | E_SINGLE_MASTER(ID_VIDEO0xe0, TYPE_MASTER, struct track_entry, video), |
| 679 | E_SINGLE_MASTER(ID_AUDIO0xe1, TYPE_MASTER, struct track_entry, audio), |
| 680 | E_SINGLE_MASTER(ID_CONTENT_ENCODINGS0x6d80, TYPE_MASTER, struct track_entry, content_encodings), |
| 681 | E_LAST |
| 682 | }; |
| 683 | |
| 684 | static struct ebml_element_desc ne_tracks_elements[] = { |
| 685 | E_MASTER(ID_TRACK_ENTRY0xae, TYPE_MASTER, struct tracks, track_entry), |
| 686 | E_LAST |
| 687 | }; |
| 688 | |
| 689 | static struct ebml_element_desc ne_cue_track_positions_elements[] = { |
| 690 | E_FIELD(ID_CUE_TRACK0xf7, TYPE_UINT, struct cue_track_positions, track), |
| 691 | E_FIELD(ID_CUE_CLUSTER_POSITION0xf1, TYPE_UINT, struct cue_track_positions, cluster_position), |
| 692 | E_FIELD(ID_CUE_BLOCK_NUMBER0x5378, TYPE_UINT, struct cue_track_positions, block_number), |
| 693 | E_LAST |
| 694 | }; |
| 695 | |
| 696 | static struct ebml_element_desc ne_cue_point_elements[] = { |
| 697 | E_FIELD(ID_CUE_TIME0xb3, TYPE_UINT, struct cue_point, time), |
| 698 | E_MASTER(ID_CUE_TRACK_POSITIONS0xb7, TYPE_MASTER, struct cue_point, cue_track_positions), |
| 699 | E_LAST |
| 700 | }; |
| 701 | |
| 702 | static struct ebml_element_desc ne_cues_elements[] = { |
| 703 | E_MASTER(ID_CUE_POINT0xbb, TYPE_MASTER, struct cues, cue_point), |
| 704 | E_LAST |
| 705 | }; |
| 706 | |
| 707 | static struct ebml_element_desc ne_segment_elements[] = { |
| 708 | E_MASTER(ID_SEEK_HEAD0x114d9b74, TYPE_MASTER, struct segment, seek_head), |
| 709 | E_SINGLE_MASTER(ID_INFO0x1549a966, TYPE_MASTER, struct segment, info), |
| 710 | E_SUSPEND(ID_CLUSTER0x1f43b675, TYPE_MASTER), |
| 711 | E_SINGLE_MASTER(ID_TRACKS0x1654ae6b, TYPE_MASTER, struct segment, tracks), |
| 712 | E_SINGLE_MASTER(ID_CUES0x1c53bb6b, TYPE_MASTER, struct segment, cues), |
| 713 | E_LAST |
| 714 | }; |
| 715 | |
| 716 | static struct ebml_element_desc ne_top_level_elements[] = { |
| 717 | E_SINGLE_MASTER(ID_EBML0x1a45dfa3, TYPE_MASTER, nestegg, ebml), |
| 718 | E_SINGLE_MASTER_O(ID_SEGMENT0x18538067, TYPE_MASTER, nestegg, segment), |
| 719 | E_LAST |
| 720 | }; |
| 721 | |
| 722 | #undef E_FIELD |
| 723 | #undef E_FIELD_DEFAULT_UINT |
| 724 | #undef E_FIELD_DEFAULT_FLOAT |
| 725 | #undef E_FIELD_ACCESSOR_DEFAULT |
| 726 | #undef E_MASTER |
| 727 | #undef E_SINGLE_MASTER_O |
| 728 | #undef E_SINGLE_MASTER |
| 729 | #undef E_SUSPEND |
| 730 | #undef E_LAST |
| 731 | |
| 732 | static struct pool_ctx * |
| 733 | ne_pool_init(void) |
| 734 | { |
| 735 | return calloc(1, sizeof(struct pool_ctx)); |
| 736 | } |
| 737 | |
| 738 | static void |
| 739 | ne_pool_destroy(struct pool_ctx * pool) |
| 740 | { |
| 741 | struct pool_node * node = pool->head; |
| 742 | while (node) { |
| 743 | struct pool_node * old = node; |
| 744 | node = node->next; |
| 745 | free(old->data); |
| 746 | free(old); |
| 747 | } |
| 748 | free(pool); |
| 749 | } |
| 750 | |
| 751 | static void * |
| 752 | ne_pool_alloc(size_t size, struct pool_ctx * pool) |
| 753 | { |
| 754 | struct pool_node * node; |
| 755 | |
| 756 | node = calloc(1, sizeof(*node)); |
| 757 | if (!node) |
| 758 | return NULL((void*)0); |
| 759 | |
| 760 | node->data = calloc(1, size); |
| 761 | if (!node->data) { |
| 762 | free(node); |
| 763 | return NULL((void*)0); |
| 764 | } |
| 765 | |
| 766 | node->next = pool->head; |
| 767 | pool->head = node; |
| 768 | |
| 769 | return node->data; |
| 770 | } |
| 771 | |
| 772 | static void * |
| 773 | ne_alloc(size_t size) |
| 774 | { |
| 775 | return calloc(1, size); |
| 776 | } |
| 777 | |
| 778 | static int |
| 779 | ne_io_seek(ne_io * io, int64_t offset, int whence) |
| 780 | { |
| 781 | int r; |
| 782 | assert(whence == NESTEGG_SEEK_SET)((void) sizeof ((whence == 0) ? 1 : 0), __extension__ ({ if ( whence == 0) ; else __assert_fail ("whence == NESTEGG_SEEK_SET" , "./../../../../media/libnestegg/src/nestegg.c", 782, __extension__ __PRETTY_FUNCTION__); })); |
| 783 | r = io->io->seek(offset, whence, io->io->userdata); |
| 784 | io->buf_offset = 0; |
| 785 | io->buf_fill = 0; |
| 786 | io->poisoned = r != 0; |
| 787 | return r; |
| 788 | } |
| 789 | |
| 790 | static int64_t |
| 791 | ne_io_tell(ne_io * io) |
| 792 | { |
| 793 | int64_t pos; |
| 794 | |
| 795 | if (io->poisoned) |
| 796 | return -1; |
| 797 | pos = io->io->tell(io->io->userdata); |
| 798 | if (pos < 0) |
| 799 | return -1; |
| 800 | assert(io->buf_fill >= io->buf_offset)((void) sizeof ((io->buf_fill >= io->buf_offset) ? 1 : 0), __extension__ ({ if (io->buf_fill >= io->buf_offset ) ; else __assert_fail ("io->buf_fill >= io->buf_offset" , "./../../../../media/libnestegg/src/nestegg.c", 800, __extension__ __PRETTY_FUNCTION__); })); |
| 801 | return pos - (int64_t) (io->buf_fill - io->buf_offset); |
| 802 | } |
| 803 | |
| 804 | static size_t |
| 805 | ne_io_clamp_request(size_t request, int64_t remaining) |
| 806 | { |
| 807 | assert(remaining > 0)((void) sizeof ((remaining > 0) ? 1 : 0), __extension__ ({ if (remaining > 0) ; else __assert_fail ("remaining > 0" , "./../../../../media/libnestegg/src/nestegg.c", 807, __extension__ __PRETTY_FUNCTION__); })); |
| 808 | /* Compare in 64 bits so large remaining values are not truncated on |
| 809 | 32-bit builds before deciding whether to clamp the request. */ |
| 810 | if ((uint64_t) remaining < (uint64_t) request) |
| 811 | return (size_t) remaining; |
| 812 | return request; |
| 813 | } |
| 814 | |
| 815 | static int |
| 816 | ne_io_read_from_buffer(ne_io * io, unsigned char * out, size_t length) |
| 817 | { |
| 818 | memcpy(out, io->buf + io->buf_offset, length); |
| 819 | io->buf_offset += length; |
| 820 | assert(io->buf_fill >= io->buf_offset)((void) sizeof ((io->buf_fill >= io->buf_offset) ? 1 : 0), __extension__ ({ if (io->buf_fill >= io->buf_offset ) ; else __assert_fail ("io->buf_fill >= io->buf_offset" , "./../../../../media/libnestegg/src/nestegg.c", 820, __extension__ __PRETTY_FUNCTION__); })); |
| 821 | return 1; |
| 822 | } |
| 823 | |
| 824 | static int |
| 825 | ne_io_rewind_to_logical_pos(ne_io * io) |
| 826 | { |
| 827 | int64_t pos = ne_io_tell(io); |
| 828 | if (pos < 0) |
| 829 | return -1; |
| 830 | return ne_io_seek(io, pos, NESTEGG_SEEK_SET0); |
| 831 | } |
| 832 | |
| 833 | static int |
| 834 | ne_io_read_direct(ne_io * io, unsigned char * out, size_t length) |
| 835 | { |
| 836 | int64_t saved_pos = ne_io_tell(io); |
| 837 | int64_t pos; |
| 838 | int64_t r; |
| 839 | |
| 840 | if (saved_pos < 0) |
| 841 | return -1; |
| 842 | pos = saved_pos; |
| 843 | while (length > 0) { |
| 844 | size_t request = length; |
| 845 | if (io->max_offset > 0) { |
| 846 | int64_t remaining = io->max_offset - pos; |
| 847 | if (remaining <= 0) { |
| 848 | if (ne_io_seek(io, saved_pos, NESTEGG_SEEK_SET0) != 0) |
| 849 | return -1; |
| 850 | return 0; |
| 851 | } |
| 852 | request = ne_io_clamp_request(request, remaining); |
| 853 | } |
| 854 | r = io->io->read(out, request, io->io->userdata); |
| 855 | if (r <= 0) { |
| 856 | if (ne_io_seek(io, saved_pos, NESTEGG_SEEK_SET0) != 0) |
| 857 | return -1; |
| 858 | return r == 0 ? 0 : -1; |
| 859 | } |
| 860 | if ((size_t) r > request) { |
| 861 | ne_io_seek(io, saved_pos, NESTEGG_SEEK_SET0); |
| 862 | return -1; |
| 863 | } |
| 864 | out += r; |
| 865 | length -= r; |
| 866 | pos += r; |
| 867 | } |
| 868 | |
| 869 | return 1; |
| 870 | } |
| 871 | |
| 872 | static int |
| 873 | ne_io_fill_buffer(ne_io * io, size_t length) |
| 874 | { |
| 875 | int64_t saved_pos; |
| 876 | int64_t pos; |
| 877 | int64_t r; |
| 878 | int io_error = 0; |
| 879 | |
| 880 | io->buf_offset = 0; |
| 881 | io->buf_fill = 0; |
| 882 | |
| 883 | saved_pos = ne_io_tell(io); |
| 884 | if (saved_pos < 0) |
| 885 | return -1; |
| 886 | pos = saved_pos; |
| 887 | while (io->buf_fill < length) { |
| 888 | size_t request = IO_BUFFER_SIZE8192 - io->buf_fill; |
| 889 | if (io->max_offset > 0) { |
| 890 | int64_t remaining = io->max_offset - pos; |
| 891 | if (remaining <= 0) |
| 892 | break; |
| 893 | request = ne_io_clamp_request(request, remaining); |
| 894 | } |
| 895 | r = io->io->read(io->buf + io->buf_fill, request, io->io->userdata); |
| 896 | if (r <= 0) { |
| 897 | if (io->buf_fill == 0) |
| 898 | return r == 0 ? 0 : -1; |
| 899 | if (r < 0) |
| 900 | io_error = 1; |
| 901 | break; |
| 902 | } |
| 903 | if ((size_t) r > request) { |
| 904 | ne_io_seek(io, saved_pos, NESTEGG_SEEK_SET0); |
| 905 | return -1; |
| 906 | } |
| 907 | io->buf_fill += r; |
| 908 | assert(io->buf_fill <= IO_BUFFER_SIZE)((void) sizeof ((io->buf_fill <= 8192) ? 1 : 0), __extension__ ({ if (io->buf_fill <= 8192) ; else __assert_fail ("io->buf_fill <= IO_BUFFER_SIZE" , "./../../../../media/libnestegg/src/nestegg.c", 908, __extension__ __PRETTY_FUNCTION__); })); |
| 909 | pos += r; |
| 910 | } |
| 911 | |
| 912 | if (length > io->buf_fill) { |
| 913 | if (ne_io_seek(io, saved_pos, NESTEGG_SEEK_SET0) != 0) |
| 914 | return -1; |
| 915 | return io_error ? -1 : 0; |
| 916 | } |
| 917 | if (io_error) { |
| 918 | /* The underlying stream position is unknown after the failed |
| 919 | read. Poison the IO so that ne_io_tell returns -1 until |
| 920 | a successful seek re-establishes the position invariant. |
| 921 | The buffered data is still valid and will be served below, |
| 922 | but any caller that needs a position must seek first. */ |
| 923 | io->poisoned = 1; |
| 924 | } |
| 925 | |
| 926 | return 1; |
| 927 | } |
| 928 | |
| 929 | static int |
| 930 | ne_io_read(ne_io * io, void * buffer, size_t length) |
| 931 | { |
| 932 | size_t buffered; |
| 933 | unsigned char * out = buffer; |
| 934 | |
| 935 | /* Fast path: request satisfied entirely from the buffer. |
| 936 | This is safe even when poisoned because the buffered bytes |
| 937 | were read before the error and are still valid. */ |
| 938 | buffered = io->buf_fill - io->buf_offset; |
| 939 | if (length <= buffered) |
| 940 | return ne_io_read_from_buffer(io, out, length); |
| 941 | |
| 942 | if (io->poisoned) |
| 943 | return -1; |
| 944 | |
| 945 | /* The buffer cannot satisfy the full request. Seek back to the |
| 946 | logical position (before any buffered-but-unconsumed bytes), |
| 947 | invalidate the buffer, and read from the callback directly. |
| 948 | This avoids partially draining the buffer and then failing, |
| 949 | which would violate the all-or-nothing read contract. */ |
| 950 | if (buffered > 0) { |
| 951 | if (ne_io_rewind_to_logical_pos(io) != 0) |
| 952 | return -1; |
| 953 | } |
| 954 | |
| 955 | /* Large reads bypass the buffer. Save the position so we can |
| 956 | rewind on failure to preserve the all-or-nothing contract. */ |
| 957 | if (length >= IO_BUFFER_SIZE8192) |
| 958 | return ne_io_read_direct(io, out, length); |
| 959 | |
| 960 | /* Refill the buffer, looping to handle short reads. Cap the |
| 961 | request to max_offset to avoid reading past the parse fence. |
| 962 | Save position so we can rewind on failure, matching the |
| 963 | all-or-nothing contract of the large-read path above. */ |
| 964 | { |
| 965 | int r = ne_io_fill_buffer(io, length); |
| 966 | if (r != 1) |
| 967 | return r; |
| 968 | } |
| 969 | |
| 970 | return ne_io_read_from_buffer(io, out, length); |
| 971 | } |
| 972 | |
| 973 | static int |
| 974 | ne_io_read_skip(ne_io * io, size_t length) |
| 975 | { |
| 976 | size_t get; |
| 977 | unsigned char buf[IO_BUFFER_SIZE8192]; |
| 978 | int r = 1; |
| 979 | |
| 980 | while (length > 0) { |
| 981 | get = length < sizeof(buf) ? length : sizeof(buf); |
| 982 | r = ne_io_read(io, buf, get); |
| 983 | if (r != 1) |
| 984 | break; |
| 985 | length -= get; |
| 986 | } |
| 987 | |
| 988 | return r; |
| 989 | } |
| 990 | |
| 991 | static int |
| 992 | ne_bare_read_vint(ne_io * io, uint64_t * value, uint64_t * length, enum vint_mask maskflag) |
| 993 | { |
| 994 | int r; |
| 995 | unsigned char b; |
| 996 | size_t maxlen = 8; |
| 997 | unsigned int count = 1, mask = 1 << 7; |
| 998 | |
| 999 | r = ne_io_read(io, &b, 1); |
| 1000 | if (r != 1) |
| 1001 | return r; |
| 1002 | |
| 1003 | while (count < maxlen) { |
| 1004 | if ((b & mask) != 0) |
| 1005 | break; |
| 1006 | mask >>= 1; |
| 1007 | count += 1; |
| 1008 | } |
| 1009 | |
| 1010 | if (length) |
| 1011 | *length = count; |
| 1012 | *value = b; |
| 1013 | |
| 1014 | if (maskflag == MASK_FIRST_BIT) |
| 1015 | *value = b & ~mask; |
| 1016 | |
| 1017 | while (--count) { |
| 1018 | r = ne_io_read(io, &b, 1); |
| 1019 | if (r != 1) |
| 1020 | return r; |
| 1021 | *value <<= 8; |
| 1022 | *value |= b; |
| 1023 | } |
| 1024 | |
| 1025 | return 1; |
| 1026 | } |
| 1027 | |
| 1028 | static int |
| 1029 | ne_read_id(ne_io * io, uint64_t * value, uint64_t * length) |
| 1030 | { |
| 1031 | return ne_bare_read_vint(io, value, length, MASK_NONE); |
| 1032 | } |
| 1033 | |
| 1034 | static int |
| 1035 | ne_read_vint(ne_io * io, uint64_t * value, uint64_t * length) |
| 1036 | { |
| 1037 | return ne_bare_read_vint(io, value, length, MASK_FIRST_BIT); |
| 1038 | } |
| 1039 | |
| 1040 | static int |
| 1041 | ne_read_svint(ne_io * io, int64_t * value, uint64_t * length) |
| 1042 | { |
| 1043 | int r; |
| 1044 | uint64_t uvalue; |
| 1045 | uint64_t ulength; |
| 1046 | int64_t svint_subtr[] = { |
| 1047 | 0x3f, 0x1fff, |
| 1048 | 0xfffff, 0x7ffffff, |
| 1049 | 0x3ffffffffLL, 0x1ffffffffffLL, |
| 1050 | 0xffffffffffffLL, 0x7fffffffffffffLL |
| 1051 | }; |
| 1052 | |
| 1053 | r = ne_bare_read_vint(io, &uvalue, &ulength, MASK_FIRST_BIT); |
| 1054 | if (r != 1) |
| 1055 | return r; |
| 1056 | *value = (int64_t) uvalue - svint_subtr[ulength - 1]; |
| 1057 | if (length) |
| 1058 | *length = ulength; |
| 1059 | return r; |
| 1060 | } |
| 1061 | |
| 1062 | static int |
| 1063 | ne_read_uint(ne_io * io, uint64_t * val, uint64_t length) |
| 1064 | { |
| 1065 | unsigned char b; |
| 1066 | int r; |
| 1067 | |
| 1068 | if (length > 8) |
| 1069 | return -1; |
| 1070 | |
| 1071 | *val = 0; |
| 1072 | while (length--) { |
| 1073 | r = ne_io_read(io, &b, 1); |
| 1074 | if (r != 1) |
| 1075 | return r; |
| 1076 | *val <<= 8; |
| 1077 | *val |= b; |
| 1078 | } |
| 1079 | return 1; |
| 1080 | } |
| 1081 | |
| 1082 | static int |
| 1083 | ne_read_int(ne_io * io, int64_t * val, uint64_t length) |
| 1084 | { |
| 1085 | int r; |
| 1086 | uint64_t uval, base; |
| 1087 | |
| 1088 | r = ne_read_uint(io, &uval, length); |
| 1089 | if (r != 1) |
| 1090 | return r; |
| 1091 | |
| 1092 | if (length == 0) { |
| 1093 | *val = 0; |
| 1094 | return 1; |
| 1095 | } |
| 1096 | |
| 1097 | if (length < sizeof(int64_t)) { |
| 1098 | base = 1; |
| 1099 | base <<= length * 8 - 1; |
| 1100 | if (uval >= base) { |
| 1101 | base = 1; |
| 1102 | base <<= length * 8; |
| 1103 | } else { |
| 1104 | base = 0; |
| 1105 | } |
| 1106 | *val = (int64_t) uval - (int64_t) base; |
| 1107 | } else { |
| 1108 | *val = (int64_t) uval; |
| 1109 | } |
| 1110 | |
| 1111 | return 1; |
| 1112 | } |
| 1113 | |
| 1114 | static int |
| 1115 | ne_read_float(ne_io * io, double * val, uint64_t length) |
| 1116 | { |
| 1117 | union { |
| 1118 | uint64_t u; |
| 1119 | struct { |
| 1120 | #if defined(__FLOAT_WORD_ORDER__) && __FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__4321 |
| 1121 | uint32_t _pad; |
| 1122 | float f; |
| 1123 | #else |
| 1124 | float f; |
| 1125 | uint32_t _pad; |
| 1126 | #endif |
| 1127 | } f; |
| 1128 | double d; |
| 1129 | } value; |
| 1130 | int r; |
| 1131 | |
| 1132 | if (length != 0 && length != 4 && length != 8) |
| 1133 | return -1; |
| 1134 | r = ne_read_uint(io, &value.u, length); |
| 1135 | if (r != 1) |
| 1136 | return r; |
| 1137 | if (length == 0) |
| 1138 | *val = 0.; |
| 1139 | else if (length == 4) |
| 1140 | *val = value.f.f; |
| 1141 | else |
| 1142 | *val = value.d; |
| 1143 | return 1; |
| 1144 | } |
| 1145 | |
| 1146 | static int |
| 1147 | ne_read_string(nestegg * ctx, char ** val, uint64_t length) |
| 1148 | { |
| 1149 | char * str; |
| 1150 | int r; |
| 1151 | |
| 1152 | if (length > LIMIT_STRING(1 << 20)) |
| 1153 | return -1; |
| 1154 | str = ne_pool_alloc(length + 1, ctx->alloc_pool); |
| 1155 | if (!str) |
| 1156 | return -1; |
| 1157 | if (length) { |
| 1158 | r = ne_io_read(&ctx->io, (unsigned char *) str, length); |
| 1159 | if (r != 1) |
| 1160 | return r; |
| 1161 | } |
| 1162 | str[length] = '\0'; |
| 1163 | *val = str; |
| 1164 | return 1; |
| 1165 | } |
| 1166 | |
| 1167 | static int |
| 1168 | ne_read_binary(nestegg * ctx, struct ebml_binary * val, uint64_t length) |
| 1169 | { |
| 1170 | if (length == 0 || length > LIMIT_BINARY(1 << 24)) |
| 1171 | return -1; |
| 1172 | val->data = ne_pool_alloc(length, ctx->alloc_pool); |
| 1173 | if (!val->data) |
| 1174 | return -1; |
| 1175 | val->length = length; |
| 1176 | return ne_io_read(&ctx->io, val->data, length); |
| 1177 | } |
| 1178 | |
| 1179 | /* True if this element's storage holds a value to report: one read from the |
| 1180 | file, or a schema-declared default. An element which is absent or was read |
| 1181 | empty holds nothing, and reads back as absent. */ |
| 1182 | static int |
| 1183 | ne_type_is_set(struct ebml_type type) |
| 1184 | { |
| 1185 | return type.read == EBML_READ_VALUE || type.read == EBML_READ_DEFAULT; |
| 1186 | } |
| 1187 | |
| 1188 | static int |
| 1189 | ne_get_uint(struct ebml_type type, uint64_t * value) |
| 1190 | { |
| 1191 | if (!ne_type_is_set(type)) |
| 1192 | return -1; |
| 1193 | |
| 1194 | assert(type.type == TYPE_UINT)((void) sizeof ((type.type == TYPE_UINT) ? 1 : 0), __extension__ ({ if (type.type == TYPE_UINT) ; else __assert_fail ("type.type == TYPE_UINT" , "./../../../../media/libnestegg/src/nestegg.c", 1194, __extension__ __PRETTY_FUNCTION__); })); |
| 1195 | |
| 1196 | *value = type.v.u; |
| 1197 | |
| 1198 | return 0; |
| 1199 | } |
| 1200 | |
| 1201 | static int |
| 1202 | ne_get_float(struct ebml_type type, double * value) |
| 1203 | { |
| 1204 | if (!ne_type_is_set(type)) |
| 1205 | return -1; |
| 1206 | |
| 1207 | assert(type.type == TYPE_FLOAT)((void) sizeof ((type.type == TYPE_FLOAT) ? 1 : 0), __extension__ ({ if (type.type == TYPE_FLOAT) ; else __assert_fail ("type.type == TYPE_FLOAT" , "./../../../../media/libnestegg/src/nestegg.c", 1207, __extension__ __PRETTY_FUNCTION__); })); |
| 1208 | |
| 1209 | *value = type.v.f; |
| 1210 | |
| 1211 | return 0; |
| 1212 | } |
| 1213 | |
| 1214 | static int |
| 1215 | ne_get_string(struct ebml_type type, char ** value) |
| 1216 | { |
| 1217 | if (!ne_type_is_set(type)) |
| 1218 | return -1; |
| 1219 | |
| 1220 | assert(type.type == TYPE_STRING)((void) sizeof ((type.type == TYPE_STRING) ? 1 : 0), __extension__ ({ if (type.type == TYPE_STRING) ; else __assert_fail ("type.type == TYPE_STRING" , "./../../../../media/libnestegg/src/nestegg.c", 1220, __extension__ __PRETTY_FUNCTION__); })); |
| 1221 | |
| 1222 | *value = type.v.s; |
| 1223 | |
| 1224 | return 0; |
| 1225 | } |
| 1226 | |
| 1227 | static int |
| 1228 | ne_get_binary(struct ebml_type type, struct ebml_binary * value) |
| 1229 | { |
| 1230 | if (!ne_type_is_set(type)) |
| 1231 | return -1; |
| 1232 | |
| 1233 | assert(type.type == TYPE_BINARY)((void) sizeof ((type.type == TYPE_BINARY) ? 1 : 0), __extension__ ({ if (type.type == TYPE_BINARY) ; else __assert_fail ("type.type == TYPE_BINARY" , "./../../../../media/libnestegg/src/nestegg.c", 1233, __extension__ __PRETTY_FUNCTION__); })); |
| 1234 | |
| 1235 | *value = type.v.b; |
| 1236 | |
| 1237 | return 0; |
| 1238 | } |
| 1239 | |
| 1240 | static int |
| 1241 | ne_is_ancestor_element(uint64_t id, struct list_node * ancestor) |
| 1242 | { |
| 1243 | struct ebml_element_desc * element; |
| 1244 | |
| 1245 | for (; ancestor; ancestor = ancestor->previous) |
| 1246 | for (element = ancestor->node; element->id; ++element) |
| 1247 | if (element->id == id) |
| 1248 | return 1; |
| 1249 | |
| 1250 | return 0; |
| 1251 | } |
| 1252 | |
| 1253 | static struct ebml_element_desc * |
| 1254 | ne_find_element(uint64_t id, struct ebml_element_desc * elements) |
| 1255 | { |
| 1256 | struct ebml_element_desc * element; |
| 1257 | |
| 1258 | for (element = elements; element->id; ++element) |
| 1259 | if (element->id == id) |
| 1260 | return element; |
| 1261 | |
| 1262 | return NULL((void*)0); |
| 1263 | } |
| 1264 | |
| 1265 | /* Initialize storage for elements with schema-declared default values |
| 1266 | so that absent and (eventually) zero-length elements read back as their |
| 1267 | default (RFC 8794 Section 11.1.6.8). Multi instance master elements are |
| 1268 | initialized as each instance is allocated in ne_read_master. */ |
| 1269 | static void |
| 1270 | ne_init_defaults(struct ebml_element_desc * elements, void * data) |
| 1271 | { |
| 1272 | struct ebml_element_desc * element; |
| 1273 | struct ebml_type * storage; |
| 1274 | |
| 1275 | for (element = elements; element->id; ++element) { |
| 1276 | if (element->type == TYPE_MASTER) { |
| 1277 | if (element->children && !(element->flags & DESC_FLAG_MULTI(1 << 0))) |
| 1278 | ne_init_defaults(element->children, (char *) data + element->offset); |
| 1279 | } else if (element->flags & DESC_FLAG_HAS_DEFAULT(1 << 3)) { |
| 1280 | storage = (struct ebml_type *) ((char *) data + element->offset); |
| 1281 | storage->type = element->type; |
| 1282 | if (element->type == TYPE_UINT) |
| 1283 | storage->v.u = element->default_uint; |
| 1284 | else |
| 1285 | storage->v.f = element->default_float; |
| 1286 | storage->read = EBML_READ_DEFAULT; |
| 1287 | } |
| 1288 | } |
| 1289 | } |
| 1290 | |
| 1291 | static int |
| 1292 | ne_ctx_push(nestegg * ctx, struct ebml_element_desc * ancestor, void * data) |
| 1293 | { |
| 1294 | struct list_node * item; |
| 1295 | |
| 1296 | item = ne_alloc(sizeof(*item)); |
| 1297 | if (!item) |
| 1298 | return -1; |
| 1299 | item->previous = ctx->ancestor; |
| 1300 | item->node = ancestor; |
| 1301 | item->data = data; |
| 1302 | ctx->ancestor = item; |
| 1303 | return 0; |
| 1304 | } |
| 1305 | |
| 1306 | static void |
| 1307 | ne_ctx_pop(nestegg * ctx) |
| 1308 | { |
| 1309 | struct list_node * item; |
| 1310 | |
| 1311 | item = ctx->ancestor; |
| 1312 | ctx->ancestor = item->previous; |
| 1313 | free(item); |
| 1314 | } |
| 1315 | |
| 1316 | static int |
| 1317 | ne_ctx_save(nestegg * ctx, struct saved_state * s) |
| 1318 | { |
| 1319 | s->stream_offset = ne_io_tell(&ctx->io); |
| 1320 | if (s->stream_offset < 0) |
| 1321 | return -1; |
| 1322 | s->last_id = ctx->last_id; |
| 1323 | s->last_size = ctx->last_size; |
| 1324 | s->last_valid = ctx->last_valid; |
| 1325 | return 0; |
| 1326 | } |
| 1327 | |
| 1328 | static int |
| 1329 | ne_ctx_restore(nestegg * ctx, struct saved_state * s) |
| 1330 | { |
| 1331 | int r; |
| 1332 | |
| 1333 | /* A failed restore leaves the logical stream position unknown, so any |
| 1334 | cached lookahead must be discarded as well. */ |
| 1335 | ctx->last_valid = 0; |
| 1336 | |
| 1337 | if (s->stream_offset < 0) |
| 1338 | return -1; |
| 1339 | r = ne_io_seek(&ctx->io, s->stream_offset, NESTEGG_SEEK_SET0); |
| 1340 | if (r != 0) |
| 1341 | return -1; |
| 1342 | ctx->last_id = s->last_id; |
| 1343 | ctx->last_size = s->last_size; |
| 1344 | ctx->last_valid = s->last_valid; |
| 1345 | return 0; |
| 1346 | } |
| 1347 | |
| 1348 | static int |
| 1349 | ne_peek_element(nestegg * ctx, uint64_t * id, uint64_t * size) |
| 1350 | { |
| 1351 | int r; |
| 1352 | |
| 1353 | if (ctx->last_valid) { |
| 1354 | if (id) |
| 1355 | *id = ctx->last_id; |
| 1356 | if (size) |
| 1357 | *size = ctx->last_size; |
| 1358 | return 1; |
| 1359 | } |
| 1360 | |
| 1361 | r = ne_read_id(&ctx->io, &ctx->last_id, NULL((void*)0)); |
| 1362 | if (r != 1) |
| 1363 | return r; |
| 1364 | |
| 1365 | r = ne_read_vint(&ctx->io, &ctx->last_size, NULL((void*)0)); |
| 1366 | if (r != 1) |
| 1367 | return r; |
| 1368 | |
| 1369 | if (id) |
| 1370 | *id = ctx->last_id; |
| 1371 | if (size) |
| 1372 | *size = ctx->last_size; |
| 1373 | |
| 1374 | ctx->last_valid = 1; |
| 1375 | |
| 1376 | return 1; |
| 1377 | } |
| 1378 | |
| 1379 | static int |
| 1380 | ne_read_element(nestegg * ctx, uint64_t * id, uint64_t * size) |
| 1381 | { |
| 1382 | int r; |
| 1383 | |
| 1384 | r = ne_peek_element(ctx, id, size); |
| 1385 | if (r != 1) |
| 1386 | return r; |
| 1387 | |
| 1388 | ctx->last_valid = 0; |
| 1389 | |
| 1390 | return 1; |
| 1391 | } |
| 1392 | |
| 1393 | static int |
| 1394 | ne_read_master(nestegg * ctx, struct ebml_element_desc * desc) |
| 1395 | { |
| 1396 | struct ebml_list * list; |
| 1397 | struct ebml_list_node * node, * oldtail; |
| 1398 | |
| 1399 | assert(desc->type == TYPE_MASTER && desc->flags & DESC_FLAG_MULTI)((void) sizeof ((desc->type == TYPE_MASTER && desc ->flags & (1 << 0)) ? 1 : 0), __extension__ ({ if (desc->type == TYPE_MASTER && desc->flags & (1 << 0)) ; else __assert_fail ("desc->type == TYPE_MASTER && desc->flags & DESC_FLAG_MULTI" , "./../../../../media/libnestegg/src/nestegg.c", 1399, __extension__ __PRETTY_FUNCTION__); })); |
| 1400 | |
| 1401 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "multi master element %llx (%s)", |
| 1402 | desc->id, desc->name); |
| 1403 | |
| 1404 | list = (struct ebml_list *) (ctx->ancestor->data + desc->offset); |
| 1405 | |
| 1406 | if (desc->id == ID_TRACK_ENTRY0xae && list->count >= LIMIT_TRACKS1000U) { |
| 1407 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, |
| 1408 | "TrackEntry count exceeds limit of %u", LIMIT_TRACKS1000U); |
| 1409 | return -1; |
| 1410 | } |
| 1411 | |
| 1412 | node = ne_pool_alloc(sizeof(*node), ctx->alloc_pool); |
| 1413 | if (!node) |
| 1414 | return -1; |
| 1415 | node->id = desc->id; |
| 1416 | node->data = ne_pool_alloc(desc->size, ctx->alloc_pool); |
| 1417 | if (!node->data) |
| 1418 | return -1; |
| 1419 | ne_init_defaults(desc->children, node->data); |
| 1420 | |
| 1421 | oldtail = list->tail; |
| 1422 | if (oldtail) |
| 1423 | oldtail->next = node; |
| 1424 | list->tail = node; |
| 1425 | if (!list->head) |
| 1426 | list->head = node; |
| 1427 | list->count += 1; |
| 1428 | |
| 1429 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, " -> using data %p", node->data); |
| 1430 | |
| 1431 | if (ne_ctx_push(ctx, desc->children, node->data) < 0) |
| 1432 | return -1; |
| 1433 | |
| 1434 | return 0; |
| 1435 | } |
| 1436 | |
| 1437 | static int |
| 1438 | ne_read_single_master(nestegg * ctx, struct ebml_element_desc * desc) |
| 1439 | { |
| 1440 | assert(desc->type == TYPE_MASTER && !(desc->flags & DESC_FLAG_MULTI))((void) sizeof ((desc->type == TYPE_MASTER && !(desc ->flags & (1 << 0))) ? 1 : 0), __extension__ ({ if (desc->type == TYPE_MASTER && !(desc->flags & (1 << 0))) ; else __assert_fail ("desc->type == TYPE_MASTER && !(desc->flags & DESC_FLAG_MULTI)" , "./../../../../media/libnestegg/src/nestegg.c", 1440, __extension__ __PRETTY_FUNCTION__); })); |
| 1441 | |
| 1442 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "single master element %llx (%s)", |
| 1443 | desc->id, desc->name); |
| 1444 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, " -> using data %p (%u)", |
| 1445 | ctx->ancestor->data + desc->offset, desc->offset); |
| 1446 | |
| 1447 | return ne_ctx_push(ctx, desc->children, ctx->ancestor->data + desc->offset); |
| 1448 | } |
| 1449 | |
| 1450 | static int |
| 1451 | ne_read_simple(nestegg * ctx, struct ebml_element_desc * desc, size_t length) |
| 1452 | { |
| 1453 | struct ebml_type * storage; |
| 1454 | int r = -1; |
| 1455 | |
| 1456 | storage = (struct ebml_type *) (ctx->ancestor->data + desc->offset); |
| 1457 | |
| 1458 | if (storage->read == EBML_READ_VALUE || storage->read == EBML_READ_EMPTY) { |
| 1459 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "element %llx (%s) already read, skipping %u", |
| 1460 | desc->id, desc->name, length); |
| 1461 | return ne_io_read_skip(&ctx->io, length); |
| 1462 | } |
| 1463 | |
| 1464 | storage->type = desc->type; |
| 1465 | |
| 1466 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "element %llx (%s) -> %p (%u)", |
| 1467 | desc->id, desc->name, storage, desc->offset); |
| 1468 | |
| 1469 | /* Elements whose default the descriptor can't express are resolved by the |
| 1470 | accessor, so record a zero-length instance as read but valueless and let |
| 1471 | the accessor treat it as absent. RFC 8794 Section 6.1 defines the value |
| 1472 | of an empty element only for elements with a declared default (the |
| 1473 | default) and without one (zero); these have neither, and zero is outside |
| 1474 | the range RFC 9559 permits for each of them. */ |
| 1475 | if (length == 0 && (desc->flags & DESC_FLAG_ACCESSOR_DEFAULT(1 << 4))) { |
| 1476 | storage->read = EBML_READ_EMPTY; |
| 1477 | return 1; |
| 1478 | } |
| 1479 | |
| 1480 | switch (desc->type) { |
| 1481 | case TYPE_UINT: |
| 1482 | /* A zero-length element keeps the value established at init: the |
| 1483 | declared default (RFC 8794 section 6.1) or, for a field with no |
| 1484 | default, zero (RFC 8794 section 7.x). */ |
| 1485 | if (length == 0) |
| 1486 | r = 1; |
| 1487 | else |
| 1488 | r = ne_read_uint(&ctx->io, &storage->v.u, length); |
| 1489 | break; |
| 1490 | case TYPE_FLOAT: |
| 1491 | if (length == 0) |
| 1492 | r = 1; |
| 1493 | else |
| 1494 | r = ne_read_float(&ctx->io, &storage->v.f, length); |
| 1495 | break; |
| 1496 | case TYPE_STRING: |
| 1497 | r = ne_read_string(ctx, &storage->v.s, length); |
| 1498 | break; |
| 1499 | case TYPE_BINARY: |
| 1500 | r = ne_read_binary(ctx, &storage->v.b, length); |
| 1501 | break; |
| 1502 | case TYPE_MASTER: |
| 1503 | case TYPE_UNKNOWN: |
| 1504 | default: |
| 1505 | assert(0)((void) sizeof ((0) ? 1 : 0), __extension__ ({ if (0) ; else __assert_fail ("0", "./../../../../media/libnestegg/src/nestegg.c", 1505, __extension__ __PRETTY_FUNCTION__); })); |
| 1506 | break; |
| 1507 | } |
| 1508 | |
| 1509 | if (r == 1) |
| 1510 | storage->read = EBML_READ_VALUE; |
| 1511 | |
| 1512 | return r; |
| 1513 | } |
| 1514 | |
| 1515 | static int |
| 1516 | ne_parse(nestegg * ctx, struct ebml_element_desc * top_level, int64_t max_offset) |
| 1517 | { |
| 1518 | int r; |
| 1519 | int64_t * data_offset; |
| 1520 | uint64_t id, size, peeked_id; |
| 1521 | struct ebml_element_desc * element; |
| 1522 | |
| 1523 | assert(ctx->ancestor)((void) sizeof ((ctx->ancestor) ? 1 : 0), __extension__ ({ if (ctx->ancestor) ; else __assert_fail ("ctx->ancestor" , "./../../../../media/libnestegg/src/nestegg.c", 1523, __extension__ __PRETTY_FUNCTION__); })); |
| 1524 | |
| 1525 | for (;;) { |
| 1526 | if (max_offset > 0) { |
| 1527 | int64_t offset = ne_io_tell(&ctx->io); |
| 1528 | if (offset < 0) { |
| 1529 | r = -1; |
| 1530 | break; |
| 1531 | } |
| 1532 | if (offset >= max_offset) { |
| 1533 | /* Reached end of offset allowed for parsing - return gracefully */ |
| 1534 | r = 1; |
| 1535 | break; |
| 1536 | } |
| 1537 | } |
| 1538 | r = ne_peek_element(ctx, &id, &size); |
| 1539 | if (r != 1) |
| 1540 | break; |
| 1541 | peeked_id = id; |
| 1542 | |
| 1543 | element = ne_find_element(id, ctx->ancestor->node); |
| 1544 | if (element) { |
| 1545 | if (element->flags & DESC_FLAG_SUSPEND(1 << 1)) { |
| 1546 | assert(element->id == ID_CLUSTER && element->type == TYPE_MASTER)((void) sizeof ((element->id == 0x1f43b675 && element ->type == TYPE_MASTER) ? 1 : 0), __extension__ ({ if (element ->id == 0x1f43b675 && element->type == TYPE_MASTER ) ; else __assert_fail ("element->id == ID_CLUSTER && element->type == TYPE_MASTER" , "./../../../../media/libnestegg/src/nestegg.c", 1546, __extension__ __PRETTY_FUNCTION__); })); |
| 1547 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "suspend parse at %llx", id); |
| 1548 | r = 1; |
| 1549 | break; |
| 1550 | } |
| 1551 | |
| 1552 | r = ne_read_element(ctx, &id, &size); |
| 1553 | if (r != 1) |
| 1554 | break; |
| 1555 | assert(id == peeked_id)((void) sizeof ((id == peeked_id) ? 1 : 0), __extension__ ({ if (id == peeked_id) ; else __assert_fail ("id == peeked_id", "./../../../../media/libnestegg/src/nestegg.c" , 1555, __extension__ __PRETTY_FUNCTION__); })); |
| 1556 | |
| 1557 | if (element->flags & DESC_FLAG_OFFSET(1 << 2)) { |
| 1558 | data_offset = (int64_t *) (ctx->ancestor->data + element->data_offset); |
| 1559 | *data_offset = ne_io_tell(&ctx->io); |
| 1560 | if (*data_offset < 0) { |
| 1561 | r = -1; |
| 1562 | break; |
| 1563 | } |
| 1564 | } |
| 1565 | |
| 1566 | if (element->type == TYPE_MASTER) { |
| 1567 | if (element->flags & DESC_FLAG_MULTI(1 << 0)) { |
| 1568 | r = ne_read_master(ctx, element); |
| 1569 | if (r < 0) |
| 1570 | break; |
| 1571 | } else { |
| 1572 | r = ne_read_single_master(ctx, element); |
| 1573 | if (r < 0) |
| 1574 | break; |
| 1575 | } |
| 1576 | continue; |
| 1577 | } else { |
| 1578 | r = ne_read_simple(ctx, element, size); |
| 1579 | if (r < 0) |
| 1580 | break; |
| 1581 | } |
| 1582 | } else if (ne_is_ancestor_element(id, ctx->ancestor->previous)) { |
| 1583 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "parent element %llx", id); |
| 1584 | if (top_level && ctx->ancestor->node == top_level) { |
| 1585 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "*** parse about to back up past top_level"); |
| 1586 | r = 1; |
| 1587 | break; |
| 1588 | } |
| 1589 | ne_ctx_pop(ctx); |
| 1590 | } else { |
| 1591 | r = ne_read_element(ctx, &id, &size); |
| 1592 | if (r != 1) |
| 1593 | break; |
| 1594 | |
| 1595 | if (id != ID_VOID0xec && id != ID_CRC320xbf) |
| 1596 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "unknown element %llx", id); |
| 1597 | r = ne_io_read_skip(&ctx->io, size); |
| 1598 | if (r != 1) |
| 1599 | break; |
| 1600 | } |
| 1601 | } |
| 1602 | |
| 1603 | if (r != 1) |
| 1604 | while (ctx->ancestor) |
| 1605 | ne_ctx_pop(ctx); |
| 1606 | |
| 1607 | return r; |
| 1608 | } |
| 1609 | |
| 1610 | static int |
| 1611 | ne_peek_element_id(nestegg * ctx, void * userdata) |
| 1612 | { |
| 1613 | uint64_t * id = userdata; |
| 1614 | return ne_peek_element(ctx, id, NULL((void*)0)); |
| 1615 | } |
| 1616 | |
| 1617 | struct ne_parse_args { |
| 1618 | struct ebml_element_desc * top_level; |
| 1619 | int64_t max_offset; |
| 1620 | }; |
| 1621 | |
| 1622 | static int |
| 1623 | ne_parse_call(nestegg * ctx, void * userdata) |
| 1624 | { |
| 1625 | struct ne_parse_args * args = userdata; |
| 1626 | return ne_parse(ctx, args->top_level, args->max_offset); |
| 1627 | } |
| 1628 | |
| 1629 | static int |
| 1630 | ne_with_io_limit(nestegg * ctx, |
| 1631 | int64_t max_offset, |
| 1632 | int (* callback)(nestegg * ctx, void * userdata), |
| 1633 | void * userdata) |
| 1634 | { |
| 1635 | int r; |
| 1636 | int64_t saved_max_offset = ctx->io.max_offset; |
| 1637 | |
| 1638 | ctx->io.max_offset = max_offset; |
| 1639 | r = callback(ctx, userdata); |
| 1640 | ctx->io.max_offset = saved_max_offset; |
| 1641 | |
| 1642 | return r; |
| 1643 | } |
| 1644 | |
| 1645 | static int |
| 1646 | ne_peek_element_with_io_limit(nestegg * ctx, uint64_t * id, int64_t max_offset) |
| 1647 | { |
| 1648 | return ne_with_io_limit(ctx, max_offset, ne_peek_element_id, id); |
| 1649 | } |
| 1650 | |
| 1651 | static int |
| 1652 | ne_parse_with_io_limit(nestegg * ctx, |
| 1653 | struct ebml_element_desc * top_level, |
| 1654 | int64_t max_offset) |
| 1655 | { |
| 1656 | struct ne_parse_args args; |
| 1657 | args.top_level = top_level; |
| 1658 | args.max_offset = max_offset; |
| 1659 | return ne_with_io_limit(ctx, max_offset, ne_parse_call, &args); |
| 1660 | } |
| 1661 | |
| 1662 | static int |
| 1663 | ne_read_block_encryption(nestegg * ctx, struct track_entry const * entry, |
| 1664 | uint64_t * encoding_type, uint64_t * encryption_algo, |
| 1665 | uint64_t * encryption_mode) |
| 1666 | { |
| 1667 | struct content_encoding * encoding; |
| 1668 | struct content_encryption * encryption; |
| 1669 | struct content_enc_aes_settings * aes_settings; |
| 1670 | |
| 1671 | *encoding_type = 0; |
| 1672 | if (entry->content_encodings.content_encoding.head) { |
| 1673 | encoding = entry->content_encodings.content_encoding.head->data; |
| 1674 | ne_get_uint(encoding->content_encoding_type, encoding_type); |
| 1675 | |
| 1676 | if (*encoding_type == NESTEGG_ENCODING_ENCRYPTION1) { |
| 1677 | /* Metadata states content is encrypted */ |
| 1678 | if (!encoding->content_encryption.head) |
| 1679 | return -1; |
| 1680 | |
| 1681 | encryption = encoding->content_encryption.head->data; |
| 1682 | ne_get_uint(encryption->content_enc_algo, encryption_algo); |
| 1683 | |
| 1684 | if (*encryption_algo != CONTENT_ENC_ALGO_AES5) { |
| 1685 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "Disallowed ContentEncAlgo used"); |
| 1686 | return -1; |
| 1687 | } |
| 1688 | |
| 1689 | if (!encryption->content_enc_aes_settings.head) { |
| 1690 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "No ContentEncAESSettings element found"); |
| 1691 | return -1; |
| 1692 | } |
| 1693 | |
| 1694 | aes_settings = encryption->content_enc_aes_settings.head->data; |
| 1695 | *encryption_mode = AES_SETTINGS_CIPHER_CTR1; |
| 1696 | ne_get_uint(aes_settings->aes_settings_cipher_mode, encryption_mode); |
| 1697 | |
| 1698 | if (*encryption_mode != AES_SETTINGS_CIPHER_CTR1) { |
| 1699 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "Disallowed AESSettingsCipherMode used"); |
| 1700 | return -1; |
| 1701 | } |
| 1702 | } |
| 1703 | } |
| 1704 | return 1; |
| 1705 | } |
| 1706 | |
| 1707 | static int |
| 1708 | ne_read_xiph_lace_value(ne_io * io, uint64_t * value, size_t * consumed) |
| 1709 | { |
| 1710 | int r; |
| 1711 | uint64_t lace; |
| 1712 | |
| 1713 | r = ne_read_uint(io, &lace, 1); |
| 1714 | if (r != 1) |
| 1715 | return r; |
| 1716 | *consumed += 1; |
| 1717 | |
| 1718 | *value = lace; |
| 1719 | while (lace == 255) { |
| 1720 | r = ne_read_uint(io, &lace, 1); |
| 1721 | if (r != 1) |
| 1722 | return r; |
| 1723 | *consumed += 1; |
| 1724 | *value += lace; |
| 1725 | /* Check frame size limit early to defeat crafted lace values. */ |
| 1726 | if (*value > LIMIT_FRAME(1 << 28)) |
| 1727 | return -1; |
| 1728 | } |
| 1729 | |
| 1730 | return 1; |
| 1731 | } |
| 1732 | |
| 1733 | static int |
| 1734 | ne_read_xiph_lacing(ne_io * io, size_t block, size_t * read, uint64_t n, uint64_t * sizes) |
| 1735 | { |
| 1736 | int r; |
| 1737 | size_t i = 0; |
| 1738 | uint64_t sum = 0; |
| 1739 | |
| 1740 | while (--n) { |
| 1741 | r = ne_read_xiph_lace_value(io, &sizes[i], read); |
| 1742 | if (r != 1) |
| 1743 | return r; |
| 1744 | sum += sizes[i]; |
| 1745 | i += 1; |
| 1746 | } |
| 1747 | |
| 1748 | if (*read + sum > block) |
| 1749 | return -1; |
| 1750 | |
| 1751 | /* Last frame is the remainder of the block. */ |
| 1752 | sizes[i] = block - *read - sum; |
| 1753 | return 1; |
| 1754 | } |
| 1755 | |
| 1756 | static int |
| 1757 | ne_read_ebml_lacing(ne_io * io, size_t block, size_t * read, uint64_t n, uint64_t * sizes) |
| 1758 | { |
| 1759 | int r; |
| 1760 | uint64_t lace, sum, length; |
| 1761 | int64_t slace, frame_size; |
| 1762 | size_t i = 0; |
| 1763 | |
| 1764 | r = ne_read_vint(io, &lace, &length); |
| 1765 | if (r != 1) |
| 1766 | return r; |
| 1767 | *read += length; |
| 1768 | |
| 1769 | sizes[i] = lace; |
| 1770 | sum = sizes[i]; |
| 1771 | |
| 1772 | i += 1; |
| 1773 | n -= 1; |
| 1774 | |
| 1775 | while (--n) { |
| 1776 | r = ne_read_svint(io, &slace, &length); |
| 1777 | if (r != 1) |
| 1778 | return r; |
| 1779 | *read += length; |
| 1780 | frame_size = (int64_t) sizes[i - 1] + slace; |
| 1781 | if (frame_size < 0) |
| 1782 | return -1; |
| 1783 | sizes[i] = frame_size; |
| 1784 | sum += sizes[i]; |
| 1785 | i += 1; |
| 1786 | } |
| 1787 | |
| 1788 | if (*read + sum > block) |
| 1789 | return -1; |
| 1790 | |
| 1791 | /* Last frame is the remainder of the block. */ |
| 1792 | sizes[i] = block - *read - sum; |
| 1793 | return 1; |
| 1794 | } |
| 1795 | |
| 1796 | static uint64_t |
| 1797 | ne_saturate_mul_uint64(uint64_t a, uint64_t b) |
| 1798 | { |
| 1799 | if (b != 0 && a > UINT64_MAX(18446744073709551615UL) / b) |
| 1800 | return UINT64_MAX(18446744073709551615UL); |
| 1801 | return a * b; |
| 1802 | } |
| 1803 | |
| 1804 | static uint64_t |
| 1805 | ne_get_timecode_scale(nestegg * ctx) |
| 1806 | { |
| 1807 | uint64_t scale; |
| 1808 | |
| 1809 | if (ne_get_uint(ctx->segment.info.timecode_scale, &scale) != 0) |
| 1810 | return 0; |
| 1811 | |
| 1812 | return scale; |
| 1813 | } |
| 1814 | |
| 1815 | static int |
| 1816 | ne_compare_track_number_index(void const * a, void const * b) |
| 1817 | { |
| 1818 | struct track_number_index const * ta = a; |
| 1819 | struct track_number_index const * tb = b; |
| 1820 | |
| 1821 | if (ta->number < tb->number) |
| 1822 | return -1; |
| 1823 | if (ta->number > tb->number) |
| 1824 | return 1; |
| 1825 | return 0; |
| 1826 | } |
| 1827 | |
| 1828 | static int |
| 1829 | ne_init_track_indexes(nestegg * ctx) |
| 1830 | { |
| 1831 | struct ebml_list * tracks = &ctx->segment.tracks.track_entry; |
| 1832 | struct ebml_list_node * node; |
| 1833 | size_t i; |
| 1834 | |
| 1835 | if (tracks->count == 0 || tracks->count > LIMIT_TRACKS1000U) |
| 1836 | return -1; |
| 1837 | |
| 1838 | ctx->track_by_index = |
| 1839 | ne_pool_alloc(tracks->count * sizeof(*ctx->track_by_index), |
| 1840 | ctx->alloc_pool); |
| 1841 | if (!ctx->track_by_index) |
| 1842 | return -1; |
| 1843 | |
| 1844 | ctx->track_by_number = |
| 1845 | ne_pool_alloc(tracks->count * sizeof(*ctx->track_by_number), |
| 1846 | ctx->alloc_pool); |
| 1847 | if (!ctx->track_by_number) |
| 1848 | return -1; |
| 1849 | |
| 1850 | node = tracks->head; |
| 1851 | for (i = 0; i < tracks->count; ++i) { |
| 1852 | struct track_entry * entry; |
| 1853 | uint64_t number; |
| 1854 | |
| 1855 | if (!node || node->id != ID_TRACK_ENTRY0xae) |
| 1856 | return -1; |
| 1857 | |
| 1858 | entry = node->data; |
| 1859 | if (ne_get_uint(entry->number, &number) != 0 || number == 0) |
| 1860 | return -1; |
| 1861 | |
| 1862 | ctx->track_by_index[i] = entry; |
| 1863 | ctx->track_by_number[i].number = number; |
| 1864 | ctx->track_by_number[i].index = (unsigned int) i; |
| 1865 | node = node->next; |
| 1866 | } |
| 1867 | |
| 1868 | if (node) |
| 1869 | return -1; |
| 1870 | |
| 1871 | qsort(ctx->track_by_number, tracks->count, |
| 1872 | sizeof(*ctx->track_by_number), ne_compare_track_number_index); |
| 1873 | |
| 1874 | for (i = 1; i < tracks->count; ++i) { |
| 1875 | if (ctx->track_by_number[i - 1].number == |
| 1876 | ctx->track_by_number[i].number) |
| 1877 | return -1; |
| 1878 | } |
| 1879 | |
| 1880 | ctx->track_count = (unsigned int) tracks->count; |
| 1881 | return 0; |
| 1882 | } |
| 1883 | |
| 1884 | static int |
| 1885 | ne_map_track_number_to_index(nestegg * ctx, |
| 1886 | uint64_t track_number, |
| 1887 | unsigned int * track_index) |
| 1888 | { |
| 1889 | size_t start = 0; |
| 1890 | size_t end = ctx->track_count; |
| 1891 | |
| 1892 | if (track_number == 0) |
| 1893 | return -1; |
| 1894 | |
| 1895 | while (start < end) { |
| 1896 | size_t middle = start + (end - start) / 2; |
| 1897 | struct track_number_index const * entry = &ctx->track_by_number[middle]; |
| 1898 | |
| 1899 | if (track_number < entry->number) { |
| 1900 | end = middle; |
| 1901 | } else if (track_number > entry->number) { |
| 1902 | start = middle + 1; |
| 1903 | } else { |
| 1904 | if (track_index) |
| 1905 | *track_index = entry->index; |
| 1906 | return 0; |
| 1907 | } |
| 1908 | } |
| 1909 | |
| 1910 | return -1; |
| 1911 | } |
| 1912 | |
| 1913 | static struct track_entry * |
| 1914 | ne_find_track_entry(nestegg * ctx, unsigned int track) |
| 1915 | { |
| 1916 | if (track >= ctx->track_count) |
| 1917 | return NULL((void*)0); |
| 1918 | |
| 1919 | return ctx->track_by_index[track]; |
| 1920 | } |
| 1921 | |
| 1922 | static struct frame * |
| 1923 | ne_alloc_frame(void) |
| 1924 | { |
| 1925 | struct frame * f = ne_alloc(sizeof(*f)); |
| 1926 | |
| 1927 | if (!f) |
| 1928 | return NULL((void*)0); |
| 1929 | |
| 1930 | f->data = NULL((void*)0); |
| 1931 | f->length = 0; |
| 1932 | f->frame_encryption = NULL((void*)0); |
| 1933 | |
| 1934 | return f; |
| 1935 | } |
| 1936 | |
| 1937 | static struct frame_encryption * |
| 1938 | ne_alloc_frame_encryption(void) |
| 1939 | { |
| 1940 | struct frame_encryption * f = ne_alloc(sizeof(*f)); |
| 1941 | |
| 1942 | if (!f) |
| 1943 | return NULL((void*)0); |
| 1944 | |
| 1945 | f->iv = NULL((void*)0); |
| 1946 | f->length = 0; |
| 1947 | f->signal_byte = 0; |
| 1948 | f->num_partitions = 0; |
| 1949 | f->partition_offsets = NULL((void*)0); |
| 1950 | |
| 1951 | return f; |
| 1952 | } |
| 1953 | |
| 1954 | static void |
| 1955 | ne_free_frame(struct frame * f) |
| 1956 | { |
| 1957 | if (f->frame_encryption) { |
| 1958 | free(f->frame_encryption->iv); |
| 1959 | free(f->frame_encryption->partition_offsets); |
| 1960 | } |
| 1961 | |
| 1962 | free(f->frame_encryption); |
| 1963 | free(f->data); |
| 1964 | free(f); |
| 1965 | } |
| 1966 | |
| 1967 | static int |
| 1968 | ne_read_block(nestegg * ctx, uint64_t block_id, uint64_t block_size, nestegg_packet ** data) |
| 1969 | { |
| 1970 | int r; |
| 1971 | int64_t timecode, abs_timecode; |
| 1972 | nestegg_packet * pkt; |
| 1973 | struct frame * f; |
| 1974 | struct track_entry * entry; |
| 1975 | uint64_t track_number, length, frame_sizes[256], cluster_tc, flags, frames, tc_scale, total, |
| 1976 | encoding_type, encryption_algo, encryption_mode; |
| 1977 | unsigned int i, lacing, track; |
| 1978 | uint8_t signal_byte, keyframe = NESTEGG_PACKET_HAS_KEYFRAME_UNKNOWN2, j = 0; |
| 1979 | size_t consumed = 0, data_size, encryption_size; |
| 1980 | |
| 1981 | *data = NULL((void*)0); |
| 1982 | |
| 1983 | if (block_size > LIMIT_BLOCK(1 << 30)) |
| 1984 | return -1; |
| 1985 | |
| 1986 | r = ne_read_vint(&ctx->io, &track_number, &length); |
| 1987 | if (r != 1) |
| 1988 | return r; |
| 1989 | |
| 1990 | if (track_number == 0) |
| 1991 | return -1; |
| 1992 | |
| 1993 | consumed += length; |
| 1994 | |
| 1995 | r = ne_read_int(&ctx->io, &timecode, 2); |
| 1996 | if (r != 1) |
| 1997 | return r; |
| 1998 | |
| 1999 | consumed += 2; |
| 2000 | |
| 2001 | r = ne_read_uint(&ctx->io, &flags, 1); |
| 2002 | if (r != 1) |
| 2003 | return r; |
| 2004 | |
| 2005 | consumed += 1; |
| 2006 | |
| 2007 | frames = 0; |
| 2008 | |
| 2009 | /* Simple blocks have an explicit flag for if the contents a keyframes*/ |
| 2010 | if (block_id == ID_SIMPLE_BLOCK0xa3) |
| 2011 | keyframe = (flags & SIMPLE_BLOCK_FLAGS_KEYFRAME(1 << 7)) == SIMPLE_BLOCK_FLAGS_KEYFRAME(1 << 7) ? |
| 2012 | NESTEGG_PACKET_HAS_KEYFRAME_TRUE1 : |
| 2013 | NESTEGG_PACKET_HAS_KEYFRAME_FALSE0; |
| 2014 | |
| 2015 | /* Flags are different between Block and SimpleBlock, but lacing is |
| 2016 | encoded the same way. */ |
| 2017 | lacing = (flags & BLOCK_FLAGS_LACING6) >> 1; |
| 2018 | |
| 2019 | switch (lacing) { |
| 2020 | case LACING_NONE0: |
| 2021 | frames = 1; |
| 2022 | break; |
| 2023 | case LACING_XIPH1: |
| 2024 | case LACING_FIXED2: |
| 2025 | case LACING_EBML3: |
| 2026 | r = ne_read_uint(&ctx->io, &frames, 1); |
| 2027 | if (r != 1) |
| 2028 | return r; |
| 2029 | consumed += 1; |
| 2030 | frames += 1; |
| 2031 | break; |
| 2032 | default: |
| 2033 | assert(0)((void) sizeof ((0) ? 1 : 0), __extension__ ({ if (0) ; else __assert_fail ("0", "./../../../../media/libnestegg/src/nestegg.c", 2033, __extension__ __PRETTY_FUNCTION__); })); |
| 2034 | return -1; |
| 2035 | } |
| 2036 | |
| 2037 | if (frames > 256) |
| 2038 | return -1; |
| 2039 | |
| 2040 | switch (lacing) { |
| 2041 | case LACING_NONE0: |
| 2042 | frame_sizes[0] = block_size - consumed; |
| 2043 | break; |
| 2044 | case LACING_XIPH1: |
| 2045 | if (frames == 1) |
| 2046 | return -1; |
| 2047 | r = ne_read_xiph_lacing(&ctx->io, block_size, &consumed, frames, frame_sizes); |
| 2048 | if (r != 1) |
| 2049 | return r; |
| 2050 | break; |
| 2051 | case LACING_FIXED2: |
| 2052 | if ((block_size - consumed) % frames) |
| 2053 | return -1; |
| 2054 | for (i = 0; i < frames; ++i) |
| 2055 | frame_sizes[i] = (block_size - consumed) / frames; |
| 2056 | break; |
| 2057 | case LACING_EBML3: |
| 2058 | if (frames == 1) |
| 2059 | return -1; |
| 2060 | r = ne_read_ebml_lacing(&ctx->io, block_size, &consumed, frames, frame_sizes); |
| 2061 | if (r != 1) |
| 2062 | return r; |
| 2063 | break; |
| 2064 | default: |
| 2065 | assert(0)((void) sizeof ((0) ? 1 : 0), __extension__ ({ if (0) ; else __assert_fail ("0", "./../../../../media/libnestegg/src/nestegg.c", 2065, __extension__ __PRETTY_FUNCTION__); })); |
| 2066 | return -1; |
| 2067 | } |
| 2068 | |
| 2069 | /* Sanity check unlaced frame sizes against total block size. */ |
| 2070 | total = consumed; |
| 2071 | for (i = 0; i < frames; ++i) |
| 2072 | total += frame_sizes[i]; |
| 2073 | if (total > block_size) |
| 2074 | return -1; |
| 2075 | |
| 2076 | if (ne_map_track_number_to_index(ctx, track_number, &track) != 0) |
| 2077 | return -1; |
| 2078 | |
| 2079 | entry = ne_find_track_entry(ctx, track); |
| 2080 | if (!entry) |
| 2081 | return -1; |
| 2082 | |
| 2083 | r = ne_read_block_encryption(ctx, entry, &encoding_type, &encryption_algo, &encryption_mode); |
| 2084 | if (r != 1) |
| 2085 | return r; |
| 2086 | |
| 2087 | /* Encryption does not support lacing */ |
| 2088 | if (lacing != LACING_NONE0 && encoding_type == NESTEGG_ENCODING_ENCRYPTION1) { |
| 2089 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "Encrypted blocks may not also be laced"); |
| 2090 | return -1; |
| 2091 | } |
| 2092 | |
| 2093 | tc_scale = ne_get_timecode_scale(ctx); |
| 2094 | if (tc_scale == 0) |
| 2095 | return -1; |
| 2096 | |
| 2097 | if (!ctx->read_cluster_timecode) |
| 2098 | return -1; |
| 2099 | cluster_tc = ctx->cluster_timecode; |
| 2100 | |
| 2101 | abs_timecode = timecode + cluster_tc; |
| 2102 | if (abs_timecode < 0) { |
| 2103 | /* Ignore the spec and negative timestamps */ |
| 2104 | ctx->log(ctx, NESTEGG_LOG_WARNING100, "ignoring negative timecode: %lld", abs_timecode); |
| 2105 | abs_timecode = 0; |
| 2106 | } |
| 2107 | |
| 2108 | pkt = ne_alloc(sizeof(*pkt)); |
| 2109 | if (!pkt) |
| 2110 | return -1; |
| 2111 | pkt->track = track; |
| 2112 | pkt->timecode = ne_saturate_mul_uint64((uint64_t) abs_timecode, tc_scale); |
| 2113 | pkt->keyframe = keyframe; |
| 2114 | pkt->frames = ne_alloc((size_t) frames * sizeof(*pkt->frames)); |
| 2115 | if (!pkt->frames) { |
| 2116 | nestegg_free_packet(pkt); |
| 2117 | return -1; |
| 2118 | } |
| 2119 | |
| 2120 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "%sblock t %lld pts %f f %llx frames: %llu", |
| 2121 | block_id == ID_BLOCK0xa1 ? "" : "simple", pkt->track, pkt->timecode / 1e9, flags, frames); |
| 2122 | |
| 2123 | for (i = 0; i < frames; ++i) { |
| 2124 | if (frame_sizes[i] > LIMIT_FRAME(1 << 28)) { |
| 2125 | nestegg_free_packet(pkt); |
| 2126 | return -1; |
| 2127 | } |
| 2128 | f = ne_alloc_frame(); |
| 2129 | if (!f) { |
| 2130 | nestegg_free_packet(pkt); |
| 2131 | return -1; |
| 2132 | } |
| 2133 | /* Parse encryption */ |
| 2134 | if (encoding_type == NESTEGG_ENCODING_ENCRYPTION1) { |
| 2135 | r = ne_io_read(&ctx->io, &signal_byte, SIGNAL_BYTE_SIZE1); |
| 2136 | if (r != 1) { |
| 2137 | ne_free_frame(f); |
| 2138 | nestegg_free_packet(pkt); |
| 2139 | return r; |
| 2140 | } |
| 2141 | f->frame_encryption = ne_alloc_frame_encryption(); |
| 2142 | if (!f->frame_encryption) { |
| 2143 | ne_free_frame(f); |
| 2144 | nestegg_free_packet(pkt); |
| 2145 | return -1; |
| 2146 | } |
| 2147 | f->frame_encryption->signal_byte = signal_byte; |
| 2148 | if ((signal_byte & ENCRYPTED_BIT_MASK(1 << 0)) == PACKET_ENCRYPTED1) { |
| 2149 | f->frame_encryption->iv = ne_alloc(IV_SIZE8); |
| 2150 | if (!f->frame_encryption->iv) { |
| 2151 | ne_free_frame(f); |
| 2152 | nestegg_free_packet(pkt); |
| 2153 | return -1; |
| 2154 | } |
| 2155 | r = ne_io_read(&ctx->io, f->frame_encryption->iv, IV_SIZE8); |
| 2156 | if (r != 1) { |
| 2157 | ne_free_frame(f); |
| 2158 | nestegg_free_packet(pkt); |
| 2159 | return r; |
| 2160 | } |
| 2161 | f->frame_encryption->length = IV_SIZE8; |
| 2162 | encryption_size = SIGNAL_BYTE_SIZE1 + IV_SIZE8; |
| 2163 | |
| 2164 | if ((signal_byte & PARTITIONED_BIT_MASK(1 << 1)) == PACKET_PARTITIONED2) { |
| 2165 | r = ne_io_read(&ctx->io, &f->frame_encryption->num_partitions, NUM_PACKETS_SIZE1); |
| 2166 | if (r != 1) { |
| 2167 | ne_free_frame(f); |
| 2168 | nestegg_free_packet(pkt); |
| 2169 | return r; |
| 2170 | } |
| 2171 | |
| 2172 | encryption_size += NUM_PACKETS_SIZE1 + f->frame_encryption->num_partitions * PACKET_OFFSET_SIZE4; |
| 2173 | f->frame_encryption->partition_offsets = ne_alloc(f->frame_encryption->num_partitions * PACKET_OFFSET_SIZE4); |
| 2174 | |
| 2175 | for (j = 0; j < f->frame_encryption->num_partitions; ++j) { |
| 2176 | uint64_t value = 0; |
| 2177 | r = ne_read_uint(&ctx->io, &value, PACKET_OFFSET_SIZE4); |
| 2178 | if (r != 1) { |
| 2179 | break; |
| 2180 | } |
| 2181 | |
| 2182 | f->frame_encryption->partition_offsets[j] = (uint32_t) value; |
| 2183 | } |
| 2184 | |
| 2185 | /* If any of the partition offsets did not return 1, then fail. */ |
| 2186 | if (j != f->frame_encryption->num_partitions) { |
| 2187 | ne_free_frame(f); |
| 2188 | nestegg_free_packet(pkt); |
| 2189 | return r; |
| 2190 | } |
| 2191 | } |
| 2192 | } else { |
| 2193 | encryption_size = SIGNAL_BYTE_SIZE1; |
| 2194 | } |
| 2195 | } else { |
| 2196 | encryption_size = 0; |
| 2197 | } |
| 2198 | if (encryption_size > frame_sizes[i]) { |
| 2199 | ne_free_frame(f); |
| 2200 | nestegg_free_packet(pkt); |
| 2201 | return -1; |
| 2202 | } |
| 2203 | data_size = frame_sizes[i] - encryption_size; |
| 2204 | /* Encryption parsed */ |
| 2205 | f->data = ne_alloc(data_size); |
| 2206 | if (!f->data) { |
| 2207 | ne_free_frame(f); |
| 2208 | nestegg_free_packet(pkt); |
| 2209 | return -1; |
| 2210 | } |
| 2211 | f->length = data_size; |
| 2212 | r = ne_io_read(&ctx->io, f->data, data_size); |
| 2213 | if (r != 1) { |
| 2214 | ne_free_frame(f); |
| 2215 | nestegg_free_packet(pkt); |
| 2216 | return r; |
| 2217 | } |
| 2218 | |
| 2219 | pkt->frames[pkt->frame_count++] = f; |
| 2220 | } |
| 2221 | |
| 2222 | *data = pkt; |
| 2223 | |
| 2224 | return 1; |
| 2225 | } |
| 2226 | |
| 2227 | static int |
| 2228 | ne_read_block_additions(nestegg * ctx, uint64_t block_size, struct block_additional ** pkt_block_additional) |
| 2229 | { |
| 2230 | int r; |
| 2231 | uint64_t id, size, data_size; |
| 2232 | int64_t block_additions_end, block_more_end; |
| 2233 | void * data; |
| 2234 | int has_data; |
| 2235 | struct block_additional * block_additional; |
| 2236 | uint64_t add_id; |
| 2237 | |
| 2238 | assert(*pkt_block_additional == NULL)((void) sizeof ((*pkt_block_additional == ((void*)0)) ? 1 : 0 ), __extension__ ({ if (*pkt_block_additional == ((void*)0)) ; else __assert_fail ("*pkt_block_additional == NULL", "./../../../../media/libnestegg/src/nestegg.c" , 2238, __extension__ __PRETTY_FUNCTION__); })); |
| 2239 | |
| 2240 | block_additions_end = ne_io_tell(&ctx->io); |
| 2241 | if (block_additions_end < 0) |
| 2242 | return -1; |
| 2243 | block_additions_end += block_size; |
| 2244 | |
| 2245 | while (1) { |
| 2246 | int64_t pos = ne_io_tell(&ctx->io); |
| 2247 | if (pos < 0) |
| 2248 | return -1; |
| 2249 | if (pos >= block_additions_end) |
| 2250 | break; |
| 2251 | add_id = 1; |
| 2252 | data = NULL((void*)0); |
| 2253 | has_data = 0; |
| 2254 | data_size = 0; |
| 2255 | r = ne_read_element(ctx, &id, &size); |
| 2256 | if (r != 1) |
| 2257 | return r; |
| 2258 | |
| 2259 | if (id != ID_BLOCK_MORE0xa6) { |
| 2260 | /* We don't know what this element is, so skip over it */ |
| 2261 | if (id != ID_VOID0xec && id != ID_CRC320xbf) |
| 2262 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, |
| 2263 | "unknown element %llx in BlockAdditions", id); |
| 2264 | r = ne_io_read_skip(&ctx->io, size); |
| 2265 | if (r != 1) |
| 2266 | return r; |
| 2267 | continue; |
| 2268 | } |
| 2269 | |
| 2270 | block_more_end = ne_io_tell(&ctx->io); |
| 2271 | if (block_more_end < 0) |
| 2272 | return -1; |
| 2273 | block_more_end += size; |
| 2274 | |
| 2275 | while (1) { |
| 2276 | int64_t pos = ne_io_tell(&ctx->io); |
| 2277 | if (pos < 0) { |
| 2278 | free(data); |
| 2279 | return -1; |
| 2280 | } |
| 2281 | if (pos >= block_more_end) |
| 2282 | break; |
| 2283 | r = ne_read_element(ctx, &id, &size); |
| 2284 | if (r != 1) { |
| 2285 | free(data); |
| 2286 | return r; |
| 2287 | } |
| 2288 | |
| 2289 | if (id == ID_BLOCK_ADD_ID0xee) { |
| 2290 | /* A zero-length BlockAddID resolves to the default of 1 (RFC 9559 |
| 2291 | Section 5.1.3.5.2.3), which add_id already holds. */ |
| 2292 | if (size != 0) { |
| 2293 | r = ne_read_uint(&ctx->io, &add_id, size); |
| 2294 | if (r != 1) { |
| 2295 | free(data); |
| 2296 | return r; |
| 2297 | } |
| 2298 | } |
| 2299 | |
| 2300 | if (add_id == 0) { |
| 2301 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "Disallowed BlockAddId 0 used"); |
| 2302 | free(data); |
| 2303 | return -1; |
| 2304 | } |
| 2305 | } else if (id == ID_BLOCK_ADDITIONAL0xa5) { |
| 2306 | if (has_data) { |
| 2307 | /* BlockAdditional is supposed to only occur once in a |
| 2308 | BlockMore. */ |
| 2309 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, |
| 2310 | "Multiple BlockAdditional elements in a BlockMore"); |
| 2311 | free(data); |
| 2312 | return -1; |
| 2313 | } |
| 2314 | |
| 2315 | has_data = 1; |
| 2316 | data_size = size; |
| 2317 | if (data_size >= LIMIT_FRAME(1 << 28)) { |
| 2318 | return -1; |
| 2319 | } |
| 2320 | if (data_size != 0) { |
| 2321 | data = ne_alloc(data_size); |
| 2322 | if (!data) |
| 2323 | return -1; |
| 2324 | r = ne_io_read(&ctx->io, data, data_size); |
| 2325 | if (r != 1) { |
| 2326 | free(data); |
| 2327 | return r; |
| 2328 | } |
| 2329 | } |
| 2330 | } else { |
| 2331 | /* We don't know what this element is, so skip over it */ |
| 2332 | if (id != ID_VOID0xec && id != ID_CRC320xbf) |
| 2333 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, |
| 2334 | "unknown element %llx in BlockMore", id); |
| 2335 | r = ne_io_read_skip(&ctx->io, size); |
| 2336 | if (r != 1) { |
| 2337 | free(data); |
| 2338 | return r; |
| 2339 | } |
| 2340 | } |
| 2341 | } |
| 2342 | |
| 2343 | if (has_data == 0) { |
| 2344 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, |
| 2345 | "No BlockAdditional element in a BlockMore"); |
| 2346 | return -1; |
| 2347 | } |
| 2348 | |
| 2349 | block_additional = ne_alloc(sizeof(*block_additional)); |
| 2350 | block_additional->next = *pkt_block_additional; |
| 2351 | block_additional->id = add_id; |
| 2352 | block_additional->data = data; |
| 2353 | block_additional->length = data_size; |
| 2354 | *pkt_block_additional = block_additional; |
| 2355 | } |
| 2356 | |
| 2357 | return 1; |
| 2358 | } |
| 2359 | |
| 2360 | static uint64_t |
| 2361 | ne_buf_read_id(unsigned char const * p, size_t length) |
| 2362 | { |
| 2363 | uint64_t id = 0; |
| 2364 | |
| 2365 | while (length > 0) { |
| 2366 | length--; |
| 2367 | id <<= 8; |
| 2368 | id |= *p++; |
| 2369 | } |
| 2370 | |
| 2371 | return id; |
| 2372 | } |
| 2373 | |
| 2374 | static struct seek * |
| 2375 | ne_find_seek_for_id(struct ebml_list_node * seek_head, uint64_t id) |
| 2376 | { |
| 2377 | struct ebml_list * head; |
| 2378 | struct ebml_list_node * seek; |
| 2379 | struct ebml_binary binary_id; |
| 2380 | struct seek * s; |
| 2381 | |
| 2382 | while (seek_head) { |
| 2383 | assert(seek_head->id == ID_SEEK_HEAD)((void) sizeof ((seek_head->id == 0x114d9b74) ? 1 : 0), __extension__ ({ if (seek_head->id == 0x114d9b74) ; else __assert_fail ( "seek_head->id == ID_SEEK_HEAD", "./../../../../media/libnestegg/src/nestegg.c" , 2383, __extension__ __PRETTY_FUNCTION__); })); |
| 2384 | head = seek_head->data; |
| 2385 | seek = head->head; |
| 2386 | |
| 2387 | while (seek) { |
| 2388 | assert(seek->id == ID_SEEK)((void) sizeof ((seek->id == 0x4dbb) ? 1 : 0), __extension__ ({ if (seek->id == 0x4dbb) ; else __assert_fail ("seek->id == ID_SEEK" , "./../../../../media/libnestegg/src/nestegg.c", 2388, __extension__ __PRETTY_FUNCTION__); })); |
| 2389 | s = seek->data; |
| 2390 | |
| 2391 | if (ne_get_binary(s->id, &binary_id) == 0 && |
| 2392 | ne_buf_read_id(binary_id.data, binary_id.length) == id) |
| 2393 | return s; |
| 2394 | |
| 2395 | seek = seek->next; |
| 2396 | } |
| 2397 | |
| 2398 | seek_head = seek_head->next; |
| 2399 | } |
| 2400 | |
| 2401 | return NULL((void*)0); |
| 2402 | } |
| 2403 | |
| 2404 | static struct cue_track_positions * |
| 2405 | ne_find_cue_position_for_track_number(struct ebml_list_node * node, |
| 2406 | uint64_t wanted_track_number) |
| 2407 | { |
| 2408 | struct cue_track_positions * pos = NULL((void*)0); |
| 2409 | uint64_t track_number; |
| 2410 | |
| 2411 | while (node) { |
| 2412 | assert(node->id == ID_CUE_TRACK_POSITIONS)((void) sizeof ((node->id == 0xb7) ? 1 : 0), __extension__ ({ if (node->id == 0xb7) ; else __assert_fail ("node->id == ID_CUE_TRACK_POSITIONS" , "./../../../../media/libnestegg/src/nestegg.c", 2412, __extension__ __PRETTY_FUNCTION__); })); |
| 2413 | pos = node->data; |
| 2414 | if (ne_get_uint(pos->track, &track_number) != 0) |
| 2415 | return NULL((void*)0); |
| 2416 | |
| 2417 | if (track_number == wanted_track_number) |
| 2418 | return pos; |
| 2419 | |
| 2420 | node = node->next; |
| 2421 | } |
| 2422 | |
| 2423 | return NULL((void*)0); |
| 2424 | } |
| 2425 | |
| 2426 | static struct cue_point * |
| 2427 | ne_find_cue_point_for_tstamp(struct ebml_list_node * cue_point, |
| 2428 | uint64_t track_number, uint64_t scale, |
| 2429 | uint64_t tstamp) |
| 2430 | { |
| 2431 | uint64_t time; |
| 2432 | struct cue_point * c, * prev = NULL((void*)0); |
| 2433 | |
| 2434 | while (cue_point) { |
| 2435 | assert(cue_point->id == ID_CUE_POINT)((void) sizeof ((cue_point->id == 0xbb) ? 1 : 0), __extension__ ({ if (cue_point->id == 0xbb) ; else __assert_fail ("cue_point->id == ID_CUE_POINT" , "./../../../../media/libnestegg/src/nestegg.c", 2435, __extension__ __PRETTY_FUNCTION__); })); |
| 2436 | c = cue_point->data; |
| 2437 | |
| 2438 | if (!prev) |
| 2439 | prev = c; |
| 2440 | |
| 2441 | if (ne_get_uint(c->time, &time) == 0 && time * scale > tstamp) |
| 2442 | break; |
| 2443 | |
| 2444 | if (ne_find_cue_position_for_track_number(c->cue_track_positions.head, |
| 2445 | track_number) != NULL((void*)0)) |
| 2446 | prev = c; |
| 2447 | |
| 2448 | cue_point = cue_point->next; |
| 2449 | } |
| 2450 | |
| 2451 | return prev; |
| 2452 | } |
| 2453 | |
| 2454 | static void |
| 2455 | ne_null_log_callback(nestegg * ctx, unsigned int severity, char const * fmt, ...) |
| 2456 | { |
| 2457 | if (ctx && severity && fmt) |
| 2458 | return; |
| 2459 | } |
| 2460 | |
| 2461 | static int |
| 2462 | ne_init_cue_points(nestegg * ctx, int64_t max_offset) |
| 2463 | { |
| 2464 | int r; |
| 2465 | struct ebml_list_node * node = ctx->segment.cues.cue_point.head; |
| 2466 | struct seek * found; |
| 2467 | uint64_t seek_pos, id; |
| 2468 | struct saved_state state; |
| 2469 | |
| 2470 | /* If there are no cues loaded, check for cues element in the seek head |
| 2471 | and load it. */ |
| 2472 | if (!node) { |
| 2473 | found = ne_find_seek_for_id(ctx->segment.seek_head.head, ID_CUES0x1c53bb6b); |
| 2474 | if (!found) |
| 2475 | return -1; |
| 2476 | |
| 2477 | if (ne_get_uint(found->position, &seek_pos) != 0) |
| 2478 | return -1; |
| 2479 | |
| 2480 | /* Save old parser state. */ |
| 2481 | r = ne_ctx_save(ctx, &state); |
| 2482 | if (r != 0) |
| 2483 | return -1; |
| 2484 | |
| 2485 | /* Seek and set up parser state for segment-level element (Cues). */ |
| 2486 | r = ne_io_seek(&ctx->io, ctx->segment_offset + seek_pos, NESTEGG_SEEK_SET0); |
| 2487 | if (r != 0) |
| 2488 | return -1; |
| 2489 | ctx->last_valid = 0; |
| 2490 | |
| 2491 | r = ne_read_element(ctx, &id, NULL((void*)0)); |
| 2492 | if (r != 1) |
| 2493 | return -1; |
| 2494 | |
| 2495 | if (id != ID_CUES0x1c53bb6b) |
| 2496 | return -1; |
| 2497 | |
| 2498 | assert(ctx->ancestor == NULL)((void) sizeof ((ctx->ancestor == ((void*)0)) ? 1 : 0), __extension__ ({ if (ctx->ancestor == ((void*)0)) ; else __assert_fail ( "ctx->ancestor == NULL", "./../../../../media/libnestegg/src/nestegg.c" , 2498, __extension__ __PRETTY_FUNCTION__); })); |
| 2499 | if (ne_ctx_push(ctx, ne_top_level_elements, ctx) < 0) |
| 2500 | return -1; |
| 2501 | if (ne_ctx_push(ctx, ne_segment_elements, &ctx->segment) < 0) |
| 2502 | return -1; |
| 2503 | if (ne_ctx_push(ctx, ne_cues_elements, &ctx->segment.cues) < 0) |
| 2504 | return -1; |
| 2505 | /* parser will run until end of cues element. */ |
| 2506 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "seek: parsing cue elements"); |
| 2507 | r = ne_parse_with_io_limit(ctx, ne_cues_elements, max_offset); |
| 2508 | while (ctx->ancestor) |
| 2509 | ne_ctx_pop(ctx); |
| 2510 | |
| 2511 | /* Reset parser state to original state and seek back to old position. */ |
| 2512 | if (ne_ctx_restore(ctx, &state) != 0) |
| 2513 | return -1; |
| 2514 | |
| 2515 | if (r < 0) |
| 2516 | return -1; |
| 2517 | |
| 2518 | node = ctx->segment.cues.cue_point.head; |
| 2519 | if (!node) |
| 2520 | return -1; |
| 2521 | } |
| 2522 | |
| 2523 | return 0; |
| 2524 | } |
| 2525 | |
| 2526 | /* Three functions that implement the nestegg_io interface, operating on a |
| 2527 | io_buffer. */ |
| 2528 | struct io_buffer { |
| 2529 | unsigned char const * buffer; |
| 2530 | size_t length; |
| 2531 | int64_t offset; |
| 2532 | }; |
| 2533 | |
| 2534 | static int64_t |
| 2535 | ne_buffer_read(void * buffer, size_t length, void * userdata) |
| 2536 | { |
| 2537 | struct io_buffer * iob = userdata; |
| 2538 | size_t available = iob->length - iob->offset; |
| 2539 | |
| 2540 | if (available == 0) |
| 2541 | return 0; |
| 2542 | |
| 2543 | if (available < length) |
| 2544 | return -1; |
| 2545 | |
| 2546 | memcpy(buffer, iob->buffer + iob->offset, length); |
| 2547 | iob->offset += length; |
| 2548 | |
| 2549 | return (int64_t) length; |
| 2550 | } |
| 2551 | |
| 2552 | static int |
| 2553 | ne_buffer_seek(int64_t offset, int whence, void * userdata) |
| 2554 | { |
| 2555 | struct io_buffer * iob = userdata; |
| 2556 | int64_t o = iob->offset; |
| 2557 | |
| 2558 | switch(whence) { |
| 2559 | case NESTEGG_SEEK_SET0: |
| 2560 | o = offset; |
| 2561 | break; |
| 2562 | case NESTEGG_SEEK_CUR1: |
| 2563 | o += offset; |
| 2564 | break; |
| 2565 | case NESTEGG_SEEK_END2: |
| 2566 | o = iob->length + offset; |
| 2567 | break; |
| 2568 | } |
| 2569 | |
| 2570 | if (o < 0 || o > (int64_t) iob->length) |
| 2571 | return -1; |
| 2572 | |
| 2573 | iob->offset = o; |
| 2574 | return 0; |
| 2575 | } |
| 2576 | |
| 2577 | static int64_t |
| 2578 | ne_buffer_tell(void * userdata) |
| 2579 | { |
| 2580 | struct io_buffer * iob = userdata; |
| 2581 | return iob->offset; |
| 2582 | } |
| 2583 | |
| 2584 | static int |
| 2585 | ne_context_new(nestegg ** context, nestegg_io io, nestegg_log callback) |
| 2586 | { |
| 2587 | nestegg * ctx; |
| 2588 | |
| 2589 | if (!(io.seek && io.tell && io.read)) |
| 2590 | return -1; |
| 2591 | |
| 2592 | ctx = ne_alloc(sizeof(*ctx)); |
| 2593 | if (!ctx) |
| 2594 | return -1; |
| 2595 | |
| 2596 | ctx->io.io = ne_alloc(sizeof(*ctx->io.io)); |
| 2597 | if (!ctx->io.io) { |
| 2598 | nestegg_destroy(ctx); |
| 2599 | return -1; |
| 2600 | } |
| 2601 | memcpy(ctx->io.io, &io, sizeof(io)); |
| 2602 | ctx->log = callback; |
| 2603 | ctx->alloc_pool = ne_pool_init(); |
| 2604 | if (!ctx->alloc_pool) { |
| 2605 | nestegg_destroy(ctx); |
| 2606 | return -1; |
| 2607 | } |
| 2608 | |
| 2609 | if (!ctx->log) |
| 2610 | ctx->log = ne_null_log_callback; |
| 2611 | |
| 2612 | ne_init_defaults(ne_top_level_elements, ctx); |
| 2613 | |
| 2614 | *context = ctx; |
| 2615 | return 0; |
| 2616 | } |
| 2617 | |
| 2618 | static int |
| 2619 | ne_match_doc_type(nestegg_io io, int64_t max_offset, const char* doc_type) |
| 2620 | { |
| 2621 | int r; |
| 2622 | uint64_t id; |
| 2623 | char * doctype; |
| 2624 | nestegg * ctx; |
| 2625 | |
| 2626 | if (ne_context_new(&ctx, io, NULL((void*)0)) != 0) |
| 2627 | return -1; |
| 2628 | |
| 2629 | r = ne_peek_element_with_io_limit(ctx, &id, max_offset); |
| 2630 | if (r != 1) { |
| 2631 | nestegg_destroy(ctx); |
| 2632 | return 0; |
| 2633 | } |
| 2634 | |
| 2635 | if (id != ID_EBML0x1a45dfa3) { |
| 2636 | nestegg_destroy(ctx); |
| 2637 | return 0; |
| 2638 | } |
| 2639 | |
| 2640 | if (ne_ctx_push(ctx, ne_top_level_elements, ctx) < 0) { |
| 2641 | nestegg_destroy(ctx); |
| 2642 | return -1; |
| 2643 | } |
| 2644 | |
| 2645 | /* we don't check the return value of ne_parse, that might fail because |
| 2646 | max_offset is not on a valid element end point. We only want to check |
| 2647 | the EBML ID and that the doctype is equal to given doc type. */ |
| 2648 | ne_parse_with_io_limit(ctx, NULL((void*)0), max_offset); |
| 2649 | while (ctx->ancestor) |
| 2650 | ne_ctx_pop(ctx); |
| 2651 | |
| 2652 | if (ne_get_string(ctx->ebml.doctype, &doctype) != 0 || |
| 2653 | strcmp(doctype, doc_type) != 0) { |
| 2654 | nestegg_destroy(ctx); |
| 2655 | return 0; |
| 2656 | } |
| 2657 | |
| 2658 | nestegg_destroy(ctx); |
| 2659 | |
| 2660 | return 1; |
| 2661 | } |
| 2662 | |
| 2663 | static void |
| 2664 | ne_free_block_additions(struct block_additional * block_additional) |
| 2665 | { |
| 2666 | while (block_additional) { |
| 2667 | struct block_additional * tmp = block_additional; |
| 2668 | block_additional = block_additional->next; |
| 2669 | free(tmp->data); |
| 2670 | free(tmp); |
| 2671 | } |
| 2672 | } |
| 2673 | |
| 2674 | int |
| 2675 | nestegg_init(nestegg ** context, nestegg_io io, nestegg_log callback, int64_t max_offset) |
| 2676 | { |
| 2677 | int r; |
| 2678 | uint64_t id, version, docversion; |
| 2679 | char * doctype; |
| 2680 | nestegg * ctx; |
| 2681 | |
| 2682 | if (ne_context_new(&ctx, io, callback) != 0) |
| 2683 | return -1; |
| 2684 | |
| 2685 | r = ne_peek_element_with_io_limit(ctx, &id, max_offset); |
| 2686 | if (r != 1) { |
| 2687 | nestegg_destroy(ctx); |
| 2688 | return -1; |
| 2689 | } |
| 2690 | |
| 2691 | if (id != ID_EBML0x1a45dfa3) { |
| 2692 | nestegg_destroy(ctx); |
| 2693 | return -1; |
| 2694 | } |
| 2695 | |
| 2696 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "ctx %p", ctx); |
| 2697 | |
| 2698 | if (ne_ctx_push(ctx, ne_top_level_elements, ctx) < 0) { |
| 2699 | nestegg_destroy(ctx); |
| 2700 | return -1; |
| 2701 | } |
| 2702 | |
| 2703 | r = ne_parse_with_io_limit(ctx, NULL((void*)0), max_offset); |
| 2704 | while (ctx->ancestor) |
| 2705 | ne_ctx_pop(ctx); |
| 2706 | |
| 2707 | if (r != 1) { |
| 2708 | nestegg_destroy(ctx); |
| 2709 | return -1; |
| 2710 | } |
| 2711 | |
| 2712 | if (ne_get_uint(ctx->ebml.ebml_read_version, &version) != 0 || |
| 2713 | version != 1) { |
| 2714 | nestegg_destroy(ctx); |
| 2715 | return -1; |
| 2716 | } |
| 2717 | |
| 2718 | /* DocType's declared default is "matroska"; string defaults are not |
| 2719 | representable in the element descriptors, so apply it here. */ |
| 2720 | if (ne_get_string(ctx->ebml.doctype, &doctype) != 0) |
| 2721 | doctype = DOCTYPE_MKV"matroska"; |
| 2722 | if (!!strcmp(doctype, DOCTYPE_WEBM"webm") && !!strcmp(doctype, DOCTYPE_MKV"matroska")) { |
| 2723 | nestegg_destroy(ctx); |
| 2724 | return -1; |
| 2725 | } |
| 2726 | |
| 2727 | if (ne_get_uint(ctx->ebml.doctype_read_version, &docversion) != 0 || |
| 2728 | docversion < 1 || docversion > 2) { |
| 2729 | nestegg_destroy(ctx); |
| 2730 | return -1; |
| 2731 | } |
| 2732 | |
| 2733 | if (!ctx->segment.tracks.track_entry.head) { |
| 2734 | nestegg_destroy(ctx); |
| 2735 | return -1; |
| 2736 | } |
| 2737 | |
| 2738 | if (ne_init_track_indexes(ctx) != 0) { |
| 2739 | nestegg_destroy(ctx); |
| 2740 | return -1; |
| 2741 | } |
| 2742 | |
| 2743 | r = ne_ctx_save(ctx, &ctx->saved); |
| 2744 | if (r != 0) { |
| 2745 | nestegg_destroy(ctx); |
| 2746 | return -1; |
| 2747 | } |
| 2748 | |
| 2749 | *context = ctx; |
| 2750 | |
| 2751 | return 0; |
| 2752 | } |
| 2753 | |
| 2754 | void |
| 2755 | nestegg_destroy(nestegg * ctx) |
| 2756 | { |
| 2757 | assert(ctx->ancestor == NULL)((void) sizeof ((ctx->ancestor == ((void*)0)) ? 1 : 0), __extension__ ({ if (ctx->ancestor == ((void*)0)) ; else __assert_fail ( "ctx->ancestor == NULL", "./../../../../media/libnestegg/src/nestegg.c" , 2757, __extension__ __PRETTY_FUNCTION__); })); |
| 2758 | if (ctx->alloc_pool) |
| 2759 | ne_pool_destroy(ctx->alloc_pool); |
| 2760 | free(ctx->io.io); |
| 2761 | free(ctx); |
| 2762 | } |
| 2763 | |
| 2764 | int |
| 2765 | nestegg_duration(nestegg * ctx, uint64_t * duration) |
| 2766 | { |
| 2767 | uint64_t tc_scale; |
| 2768 | double unscaled_duration; |
| 2769 | |
| 2770 | if (ne_get_float(ctx->segment.info.duration, &unscaled_duration) != 0) |
| 2771 | return -1; |
| 2772 | |
| 2773 | tc_scale = ne_get_timecode_scale(ctx); |
| 2774 | if (tc_scale == 0) |
| 2775 | return -1; |
| 2776 | |
| 2777 | if (unscaled_duration != unscaled_duration || |
| 2778 | unscaled_duration < 0 || unscaled_duration >= (double) UINT64_MAX(18446744073709551615UL) || |
| 2779 | (uint64_t) unscaled_duration > UINT64_MAX(18446744073709551615UL) / tc_scale) |
| 2780 | return -1; |
| 2781 | |
| 2782 | *duration = (uint64_t) (unscaled_duration * tc_scale); |
| 2783 | return 0; |
| 2784 | } |
| 2785 | |
| 2786 | int |
| 2787 | nestegg_tstamp_scale(nestegg * ctx, uint64_t * scale) |
| 2788 | { |
| 2789 | *scale = ne_get_timecode_scale(ctx); |
| 2790 | if (*scale == 0) |
| 2791 | return -1; |
| 2792 | return 0; |
| 2793 | } |
| 2794 | |
| 2795 | int |
| 2796 | nestegg_track_count(nestegg * ctx, unsigned int * tracks) |
| 2797 | { |
| 2798 | *tracks = ctx->track_count; |
| 2799 | return 0; |
| 2800 | } |
| 2801 | |
| 2802 | int |
| 2803 | nestegg_get_cue_point(nestegg * ctx, unsigned int cluster_num, int64_t max_offset, |
| 2804 | int64_t * start_pos, int64_t * end_pos, uint64_t * tstamp) |
| 2805 | { |
| 2806 | int range_obtained = 0; |
| 2807 | unsigned int cluster_count = 0; |
| 2808 | struct cue_point * cue_point; |
| 2809 | struct cue_track_positions * pos; |
| 2810 | uint64_t seek_pos, track_number, tc_scale, time; |
| 2811 | struct ebml_list_node * cues_node = ctx->segment.cues.cue_point.head; |
| 2812 | struct ebml_list_node * cue_pos_node = NULL((void*)0); |
| 2813 | |
| 2814 | if (!start_pos || !end_pos || !tstamp) |
| 2815 | return -1; |
| 2816 | |
| 2817 | /* Initialise return values */ |
| 2818 | *start_pos = -1; |
| 2819 | *end_pos = -1; |
| 2820 | *tstamp = 0; |
| 2821 | |
| 2822 | if (!cues_node) { |
| 2823 | ne_init_cue_points(ctx, max_offset); |
| 2824 | cues_node = ctx->segment.cues.cue_point.head; |
| 2825 | /* Verify cues have been added to context. */ |
| 2826 | if (!cues_node) |
| 2827 | return -1; |
| 2828 | } |
| 2829 | |
| 2830 | tc_scale = ne_get_timecode_scale(ctx); |
| 2831 | if (tc_scale == 0) |
| 2832 | return -1; |
| 2833 | |
| 2834 | while (cues_node && !range_obtained) { |
| 2835 | assert(cues_node->id == ID_CUE_POINT)((void) sizeof ((cues_node->id == 0xbb) ? 1 : 0), __extension__ ({ if (cues_node->id == 0xbb) ; else __assert_fail ("cues_node->id == ID_CUE_POINT" , "./../../../../media/libnestegg/src/nestegg.c", 2835, __extension__ __PRETTY_FUNCTION__); })); |
| 2836 | cue_point = cues_node->data; |
| 2837 | cue_pos_node = cue_point->cue_track_positions.head; |
| 2838 | while (cue_pos_node) { |
| 2839 | assert(cue_pos_node->id == ID_CUE_TRACK_POSITIONS)((void) sizeof ((cue_pos_node->id == 0xb7) ? 1 : 0), __extension__ ({ if (cue_pos_node->id == 0xb7) ; else __assert_fail ("cue_pos_node->id == ID_CUE_TRACK_POSITIONS" , "./../../../../media/libnestegg/src/nestegg.c", 2839, __extension__ __PRETTY_FUNCTION__); })); |
| 2840 | pos = cue_pos_node->data; |
| 2841 | if (ne_get_uint(pos->track, &track_number) != 0) |
| 2842 | return -1; |
| 2843 | |
| 2844 | if (ne_map_track_number_to_index(ctx, track_number, NULL((void*)0)) != 0) |
| 2845 | return -1; |
| 2846 | |
| 2847 | if (ne_get_uint(pos->cluster_position, &seek_pos) != 0) |
| 2848 | return -1; |
| 2849 | if (cluster_count == cluster_num) { |
| 2850 | *start_pos = ctx->segment_offset + seek_pos; |
| 2851 | if (ne_get_uint(cue_point->time, &time) != 0) |
| 2852 | return -1; |
| 2853 | *tstamp = time * tc_scale; |
| 2854 | } else if (cluster_count == cluster_num + 1) { |
| 2855 | *end_pos = ctx->segment_offset + seek_pos - 1; |
| 2856 | range_obtained = 1; |
| 2857 | break; |
| 2858 | } |
| 2859 | cluster_count++; |
| 2860 | cue_pos_node = cue_pos_node->next; |
| 2861 | } |
| 2862 | cues_node = cues_node->next; |
| 2863 | } |
| 2864 | |
| 2865 | return 0; |
| 2866 | } |
| 2867 | |
| 2868 | int |
| 2869 | nestegg_offset_seek(nestegg * ctx, uint64_t offset) |
| 2870 | { |
| 2871 | int r; |
| 2872 | |
| 2873 | if (offset > INT64_MAX(9223372036854775807L)) |
| 2874 | return -1; |
| 2875 | |
| 2876 | /* Seek and set up parser state for segment-level element (Cluster). */ |
| 2877 | r = ne_io_seek(&ctx->io, offset, NESTEGG_SEEK_SET0); |
| 2878 | if (r != 0) |
| 2879 | return -1; |
| 2880 | ctx->last_valid = 0; |
| 2881 | |
| 2882 | assert(ctx->ancestor == NULL)((void) sizeof ((ctx->ancestor == ((void*)0)) ? 1 : 0), __extension__ ({ if (ctx->ancestor == ((void*)0)) ; else __assert_fail ( "ctx->ancestor == NULL", "./../../../../media/libnestegg/src/nestegg.c" , 2882, __extension__ __PRETTY_FUNCTION__); })); |
| 2883 | |
| 2884 | return 0; |
| 2885 | } |
| 2886 | |
| 2887 | int |
| 2888 | nestegg_track_seek(nestegg * ctx, unsigned int track, uint64_t tstamp) |
| 2889 | { |
| 2890 | int r; |
| 2891 | struct cue_point * cue_point; |
| 2892 | struct cue_track_positions * pos; |
| 2893 | struct track_entry * entry; |
| 2894 | uint64_t seek_pos, tc_scale, track_number; |
| 2895 | |
| 2896 | entry = ne_find_track_entry(ctx, track); |
| 2897 | if (!entry || ne_get_uint(entry->number, &track_number) != 0) |
| 2898 | return -1; |
| 2899 | |
| 2900 | /* If there are no cues loaded, check for cues element in the seek head |
| 2901 | and load it. */ |
| 2902 | if (!ctx->segment.cues.cue_point.head) { |
| 2903 | r = ne_init_cue_points(ctx, -1); |
| 2904 | if (r != 0) |
| 2905 | return -1; |
| 2906 | } |
| 2907 | |
| 2908 | tc_scale = ne_get_timecode_scale(ctx); |
| 2909 | if (tc_scale == 0) |
| 2910 | return -1; |
| 2911 | |
| 2912 | cue_point = ne_find_cue_point_for_tstamp(ctx->segment.cues.cue_point.head, |
| 2913 | track_number, tc_scale, tstamp); |
| 2914 | if (!cue_point) |
| 2915 | return -1; |
| 2916 | |
| 2917 | pos = ne_find_cue_position_for_track_number( |
| 2918 | cue_point->cue_track_positions.head, track_number); |
| 2919 | if (pos == NULL((void*)0)) |
| 2920 | return -1; |
| 2921 | |
| 2922 | if (ne_get_uint(pos->cluster_position, &seek_pos) != 0) |
| 2923 | return -1; |
| 2924 | |
| 2925 | /* Seek to (we assume) the start of a Cluster element. */ |
| 2926 | r = nestegg_offset_seek(ctx, ctx->segment_offset + seek_pos); |
| 2927 | if (r != 0) |
| 2928 | return -1; |
| 2929 | |
| 2930 | return 0; |
| 2931 | } |
| 2932 | |
| 2933 | int |
| 2934 | nestegg_track_type(nestegg * ctx, unsigned int track) |
| 2935 | { |
| 2936 | struct track_entry * entry; |
| 2937 | uint64_t type; |
| 2938 | |
| 2939 | entry = ne_find_track_entry(ctx, track); |
| 2940 | if (!entry) |
| 2941 | return -1; |
| 2942 | |
| 2943 | if (ne_get_uint(entry->type, &type) != 0) |
| 2944 | return -1; |
| 2945 | |
| 2946 | if (type == TRACK_TYPE_VIDEO1) |
| 2947 | return NESTEGG_TRACK_VIDEO0; |
| 2948 | |
| 2949 | if (type == TRACK_TYPE_AUDIO2) |
| 2950 | return NESTEGG_TRACK_AUDIO1; |
| 2951 | |
| 2952 | return NESTEGG_TRACK_UNKNOWN2147483647; |
| 2953 | } |
| 2954 | |
| 2955 | int |
| 2956 | nestegg_track_codec_id(nestegg * ctx, unsigned int track) |
| 2957 | { |
| 2958 | char * codec_id; |
| 2959 | struct track_entry * entry; |
| 2960 | |
| 2961 | entry = ne_find_track_entry(ctx, track); |
| 2962 | if (!entry) |
| 2963 | return -1; |
| 2964 | |
| 2965 | if (ne_get_string(entry->codec_id, &codec_id) != 0) |
| 2966 | return -1; |
| 2967 | |
| 2968 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "nestegg_track_codec_id: %s\n", codec_id); |
| 2969 | if (strcmp(codec_id, TRACK_ID_VP8"V_VP8") == 0) |
| 2970 | return NESTEGG_CODEC_VP80; |
| 2971 | |
| 2972 | if (strcmp(codec_id, TRACK_ID_VP9"V_VP9") == 0) |
| 2973 | return NESTEGG_CODEC_VP92; |
| 2974 | |
| 2975 | if (strcmp(codec_id, TRACK_ID_AV1"V_AV1") == 0) |
| 2976 | return NESTEGG_CODEC_AV14; |
| 2977 | |
| 2978 | if (strcmp(codec_id, TRACK_ID_VORBIS"A_VORBIS") == 0) |
| 2979 | return NESTEGG_CODEC_VORBIS1; |
| 2980 | |
| 2981 | if (strcmp(codec_id, TRACK_ID_OPUS"A_OPUS") == 0) |
| 2982 | return NESTEGG_CODEC_OPUS3; |
| 2983 | |
| 2984 | if (strcmp(codec_id, TRACK_ID_AVC"V_MPEG4/ISO/AVC") == 0) |
| 2985 | return NESTEGG_CODEC_AVC5; |
| 2986 | |
| 2987 | if (strcmp(codec_id, TRACK_ID_HEVC"V_MPEGH/ISO/HEVC") == 0) |
| 2988 | return NESTEGG_CODEC_HEVC6; |
| 2989 | |
| 2990 | if (strcmp(codec_id, TRACK_ID_AAC"A_AAC") == 0 || |
| 2991 | strcmp(codec_id, TRACK_ID_AAC_MP4_LC"A_AAC/MPEG4/LC") == 0 || |
| 2992 | strcmp(codec_id, TRACK_ID_AAC_MP4_LC_SBR"A_AAC/MPEG4/LC/SBR") == 0 || |
| 2993 | strcmp(codec_id, TRACK_ID_AAC_MP4_LTP"A_AAC/MPEG4/LTP") == 0 || |
| 2994 | strcmp(codec_id, TRACK_ID_AAC_MP4_MAIN"A_AAC/MPEG4/MAIN") == 0 || |
| 2995 | strcmp(codec_id, TRACK_ID_AAC_MP4_SSR"A_AAC/MPEG4/SSR") == 0) |
| 2996 | return NESTEGG_CODEC_AAC7; |
| 2997 | |
| 2998 | if (strcmp(codec_id, TRACK_ID_FLAC"A_FLAC") == 0) |
| 2999 | return NESTEGG_CODEC_FLAC8; |
| 3000 | |
| 3001 | if (strcmp(codec_id, TRACK_ID_MP3"A_MPEG/L3") == 0) |
| 3002 | return NESTEGG_CODEC_MP39; |
| 3003 | |
| 3004 | if (strcmp(codec_id, TRACK_ID_PCM_FLOAT"A_PCM/FLOAT/IEEE") == 0 || |
| 3005 | strcmp(codec_id, TRACK_ID_PCM_INT_BE"A_PCM/INT/BIG") == 0 || |
| 3006 | strcmp(codec_id, TRACK_ID_PCM_INT_LE"A_PCM/INT/LIT") == 0) |
| 3007 | return NESTEGG_CODEC_PCM10; |
| 3008 | |
| 3009 | return NESTEGG_CODEC_UNKNOWN2147483647; |
| 3010 | } |
| 3011 | |
| 3012 | int |
| 3013 | nestegg_track_codec_data_count(nestegg * ctx, unsigned int track, |
| 3014 | unsigned int * count) |
| 3015 | { |
| 3016 | struct track_entry * entry; |
| 3017 | struct ebml_binary codec_private; |
| 3018 | int codec_id; |
| 3019 | unsigned char * p; |
| 3020 | |
| 3021 | *count = 0; |
| 3022 | |
| 3023 | entry = ne_find_track_entry(ctx, track); |
| 3024 | if (!entry) |
| 3025 | return -1; |
| 3026 | |
| 3027 | codec_id = nestegg_track_codec_id(ctx, track); |
| 3028 | |
| 3029 | /* Usually don't have codec private */ |
| 3030 | if (codec_id == NESTEGG_CODEC_MP39 || codec_id == NESTEGG_CODEC_VP80 || |
| 3031 | codec_id == NESTEGG_CODEC_VP92) { |
| 3032 | *count = 0; |
| 3033 | return 0; |
| 3034 | } |
| 3035 | |
| 3036 | /* Usually one codec private */ |
| 3037 | if (codec_id == NESTEGG_CODEC_OPUS3 || codec_id == NESTEGG_CODEC_PCM10 || |
| 3038 | codec_id == NESTEGG_CODEC_AAC7 || codec_id == NESTEGG_CODEC_FLAC8 || |
| 3039 | codec_id == NESTEGG_CODEC_AVC5 || codec_id == NESTEGG_CODEC_HEVC6 || |
| 3040 | codec_id == NESTEGG_CODEC_AV14) { |
| 3041 | *count = 1; |
| 3042 | return 0; |
| 3043 | } |
| 3044 | |
| 3045 | /* Vorbis spec requires three headers in the codec private */ |
| 3046 | if (codec_id != NESTEGG_CODEC_VORBIS1) |
| 3047 | return -1; |
| 3048 | |
| 3049 | if (ne_get_binary(entry->codec_private, &codec_private) != 0) |
| 3050 | return -1; |
| 3051 | |
| 3052 | if (codec_private.length < 1) |
| 3053 | return -1; |
| 3054 | |
| 3055 | p = codec_private.data; |
| 3056 | *count = *p + 1; |
| 3057 | |
| 3058 | if (*count > 3) |
| 3059 | return -1; |
| 3060 | |
| 3061 | return 0; |
| 3062 | } |
| 3063 | |
| 3064 | int |
| 3065 | nestegg_track_codec_data(nestegg * ctx, unsigned int track, unsigned int item, |
| 3066 | unsigned char ** data, size_t * length) |
| 3067 | { |
| 3068 | struct track_entry * entry; |
| 3069 | struct ebml_binary codec_private; |
| 3070 | unsigned int count = 0; |
| 3071 | |
| 3072 | *data = NULL((void*)0); |
| 3073 | *length = 0; |
| 3074 | |
| 3075 | entry = ne_find_track_entry(ctx, track); |
| 3076 | if (!entry) |
| 3077 | return -1; |
| 3078 | |
| 3079 | if (nestegg_track_codec_data_count(ctx, track, &count) != 0 || count == 0) |
| 3080 | return -1; |
| 3081 | |
| 3082 | if (ne_get_binary(entry->codec_private, &codec_private) != 0) |
| 3083 | return -1; |
| 3084 | |
| 3085 | if (nestegg_track_codec_id(ctx, track) == NESTEGG_CODEC_VORBIS1) { |
| 3086 | uint64_t count; |
| 3087 | uint64_t sizes[3]; |
| 3088 | size_t total; |
| 3089 | unsigned char * p; |
| 3090 | unsigned int i; |
| 3091 | int r; |
| 3092 | |
| 3093 | nestegg_io buf_io; |
| 3094 | ne_io buf_io_ctx; |
| 3095 | struct io_buffer userdata; |
| 3096 | userdata.buffer = codec_private.data; |
| 3097 | userdata.length = codec_private.length; |
| 3098 | userdata.offset = 0; |
| 3099 | |
| 3100 | buf_io.read = ne_buffer_read; |
| 3101 | buf_io.seek = ne_buffer_seek; |
| 3102 | buf_io.tell = ne_buffer_tell; |
| 3103 | buf_io.userdata = &userdata; |
| 3104 | |
| 3105 | memset(&buf_io_ctx, 0, sizeof(buf_io_ctx)); |
| 3106 | buf_io_ctx.io = &buf_io; |
| 3107 | buf_io_ctx.max_offset = codec_private.length; |
| 3108 | |
| 3109 | total = 0; |
| 3110 | |
| 3111 | r = ne_read_uint(&buf_io_ctx, &count, 1); |
| 3112 | if (r != 1) |
| 3113 | return r; |
| 3114 | total += 1; |
| 3115 | count += 1; |
| 3116 | |
| 3117 | if (count > 3) |
| 3118 | return -1; |
| 3119 | r = ne_read_xiph_lacing(&buf_io_ctx, codec_private.length, &total, count, sizes); |
| 3120 | if (r != 1) |
| 3121 | return r; |
| 3122 | |
| 3123 | if (item >= count) |
| 3124 | return -1; |
| 3125 | |
| 3126 | p = codec_private.data + total; |
| 3127 | for (i = 0; i < item; ++i) { |
| 3128 | p += sizes[i]; |
| 3129 | } |
| 3130 | assert((size_t) (p - codec_private.data) <= codec_private.length &&((void) sizeof (((size_t) (p - codec_private.data) <= codec_private .length && codec_private.length - (p - codec_private. data) >= sizes[item]) ? 1 : 0), __extension__ ({ if ((size_t ) (p - codec_private.data) <= codec_private.length && codec_private.length - (p - codec_private.data) >= sizes[ item]) ; else __assert_fail ("(size_t) (p - codec_private.data) <= codec_private.length && codec_private.length - (p - codec_private.data) >= sizes[item]" , "./../../../../media/libnestegg/src/nestegg.c", 3131, __extension__ __PRETTY_FUNCTION__); })) |
| 3131 | codec_private.length - (p - codec_private.data) >= sizes[item])((void) sizeof (((size_t) (p - codec_private.data) <= codec_private .length && codec_private.length - (p - codec_private. data) >= sizes[item]) ? 1 : 0), __extension__ ({ if ((size_t ) (p - codec_private.data) <= codec_private.length && codec_private.length - (p - codec_private.data) >= sizes[ item]) ; else __assert_fail ("(size_t) (p - codec_private.data) <= codec_private.length && codec_private.length - (p - codec_private.data) >= sizes[item]" , "./../../../../media/libnestegg/src/nestegg.c", 3131, __extension__ __PRETTY_FUNCTION__); })); |
| 3132 | *data = p; |
| 3133 | *length = sizes[item]; |
| 3134 | } else { |
| 3135 | if (item >= 1) |
| 3136 | return -1; |
| 3137 | |
| 3138 | *data = codec_private.data; |
| 3139 | *length = codec_private.length; |
| 3140 | } |
| 3141 | |
| 3142 | return 0; |
| 3143 | } |
| 3144 | |
| 3145 | int |
| 3146 | nestegg_track_video_params(nestegg * ctx, unsigned int track, |
| 3147 | nestegg_video_params * params) |
| 3148 | { |
| 3149 | struct track_entry * entry; |
| 3150 | uint64_t value; |
| 3151 | double fvalue; |
| 3152 | |
| 3153 | memset(params, 0, sizeof(*params)); |
| 3154 | |
| 3155 | entry = ne_find_track_entry(ctx, track); |
| 3156 | if (!entry) |
| 3157 | return -1; |
| 3158 | |
| 3159 | if (nestegg_track_type(ctx, track) != NESTEGG_TRACK_VIDEO0) |
| 3160 | return -1; |
| 3161 | |
| 3162 | if (ne_get_uint(entry->video.stereo_mode, &value) == 0 && |
| 3163 | (value <= NESTEGG_VIDEO_STEREO_TOP_BOTTOM3 || |
| 3164 | value == NESTEGG_VIDEO_STEREO_RIGHT_LEFT11)) |
| 3165 | params->stereo_mode = value; |
| 3166 | |
| 3167 | if (ne_get_uint(entry->video.alpha_mode, &value) == 0) |
| 3168 | params->alpha_mode = value; |
| 3169 | |
| 3170 | if (ne_get_uint(entry->video.pixel_width, &value) != 0) |
| 3171 | return -1; |
| 3172 | params->width = value; |
| 3173 | |
| 3174 | if (ne_get_uint(entry->video.pixel_height, &value) != 0) |
| 3175 | return -1; |
| 3176 | params->height = value; |
| 3177 | |
| 3178 | if (ne_get_uint(entry->video.pixel_crop_bottom, &value) == 0) |
| 3179 | params->crop_bottom = value; |
| 3180 | |
| 3181 | if (ne_get_uint(entry->video.pixel_crop_top, &value) == 0) |
| 3182 | params->crop_top = value; |
| 3183 | |
| 3184 | if (ne_get_uint(entry->video.pixel_crop_left, &value) == 0) |
| 3185 | params->crop_left = value; |
| 3186 | |
| 3187 | if (ne_get_uint(entry->video.pixel_crop_right, &value) == 0) |
| 3188 | params->crop_right = value; |
| 3189 | |
| 3190 | /* DisplayWidth and DisplayHeight default to PixelWidth and PixelHeight. A |
| 3191 | derived default is not representable in the element descriptors, which |
| 3192 | mark these elements DESC_FLAG_ACCESSOR_DEFAULT so that an absent and a |
| 3193 | zero-length instance both arrive here unread. Note RFC 9559 derives the |
| 3194 | default from the frame size left by the PixelCrop elements when |
| 3195 | DisplayUnit is 0; nestegg reports the uncropped size. */ |
| 3196 | value = params->width; |
| 3197 | ne_get_uint(entry->video.display_width, &value); |
| 3198 | params->display_width = value; |
| 3199 | |
| 3200 | value = params->height; |
| 3201 | ne_get_uint(entry->video.display_height, &value); |
| 3202 | params->display_height = value; |
| 3203 | |
| 3204 | if (ne_get_uint(entry->video.colour.matrix_coefficients, &value) == 0) |
| 3205 | params->matrix_coefficients = value; |
| 3206 | |
| 3207 | if (ne_get_uint(entry->video.colour.range, &value) == 0) |
| 3208 | params->range = value; |
| 3209 | |
| 3210 | if (ne_get_uint(entry->video.colour.transfer_characteristics, &value) == 0) |
| 3211 | params->transfer_characteristics = value; |
| 3212 | |
| 3213 | if (ne_get_uint(entry->video.colour.primaries, &value) == 0) |
| 3214 | params->primaries = value; |
| 3215 | |
| 3216 | value = 0; |
| 3217 | ne_get_uint(entry->video.colour.max_cll, &value); |
| 3218 | params->max_cll = value; |
| 3219 | |
| 3220 | value = 0; |
| 3221 | ne_get_uint(entry->video.colour.max_fall, &value); |
| 3222 | params->max_fall = value; |
| 3223 | |
| 3224 | if (ne_get_uint(entry->video.projection.type, &value) == 0) |
| 3225 | params->projection_type = value; |
| 3226 | |
| 3227 | if (ne_get_float(entry->video.projection.pose_yaw, &fvalue) == 0) |
| 3228 | params->projection_pose_yaw = fvalue; |
| 3229 | |
| 3230 | if (ne_get_float(entry->video.projection.pose_pitch, &fvalue) == 0) |
| 3231 | params->projection_pose_pitch = fvalue; |
| 3232 | |
| 3233 | if (ne_get_float(entry->video.projection.pose_roll, &fvalue) == 0) |
| 3234 | params->projection_pose_roll = fvalue; |
| 3235 | |
| 3236 | fvalue = strtod("NaN", NULL((void*)0)); |
| 3237 | ne_get_float(entry->video.colour.mastering_metadata.primary_r_chromacity_x, &fvalue); |
| 3238 | params->primary_r_chromacity_x = fvalue; |
| 3239 | |
| 3240 | fvalue = strtod("NaN", NULL((void*)0)); |
| 3241 | ne_get_float(entry->video.colour.mastering_metadata.primary_r_chromacity_y, &fvalue); |
| 3242 | params->primary_r_chromacity_y = fvalue; |
| 3243 | |
| 3244 | fvalue = strtod("NaN", NULL((void*)0)); |
| 3245 | ne_get_float(entry->video.colour.mastering_metadata.primary_g_chromacity_x, &fvalue); |
| 3246 | params->primary_g_chromacity_x = fvalue; |
| 3247 | |
| 3248 | fvalue = strtod("NaN", NULL((void*)0)); |
| 3249 | ne_get_float(entry->video.colour.mastering_metadata.primary_g_chromacity_y, &fvalue); |
| 3250 | params->primary_g_chromacity_y = fvalue; |
| 3251 | |
| 3252 | fvalue = strtod("NaN", NULL((void*)0)); |
| 3253 | ne_get_float(entry->video.colour.mastering_metadata.primary_b_chromacity_x, &fvalue); |
| 3254 | params->primary_b_chromacity_x = fvalue; |
| 3255 | |
| 3256 | fvalue = strtod("NaN", NULL((void*)0)); |
| 3257 | ne_get_float(entry->video.colour.mastering_metadata.primary_b_chromacity_y, &fvalue); |
| 3258 | params->primary_b_chromacity_y = fvalue; |
| 3259 | |
| 3260 | fvalue = strtod("NaN", NULL((void*)0)); |
| 3261 | ne_get_float(entry->video.colour.mastering_metadata.white_point_chromaticity_x, &fvalue); |
| 3262 | params->white_point_chromaticity_x = fvalue; |
| 3263 | |
| 3264 | fvalue = strtod("NaN", NULL((void*)0)); |
| 3265 | ne_get_float(entry->video.colour.mastering_metadata.white_point_chromaticity_y, &fvalue); |
| 3266 | params->white_point_chromaticity_y = fvalue; |
| 3267 | |
| 3268 | fvalue = strtod("NaN", NULL((void*)0)); |
| 3269 | ne_get_float(entry->video.colour.mastering_metadata.luminance_max, &fvalue); |
| 3270 | params->luminance_max = fvalue; |
| 3271 | |
| 3272 | fvalue = strtod("NaN", NULL((void*)0)); |
| 3273 | ne_get_float(entry->video.colour.mastering_metadata.luminance_min, &fvalue); |
| 3274 | params->luminance_min = fvalue; |
| 3275 | |
| 3276 | return 0; |
| 3277 | } |
| 3278 | |
| 3279 | int |
| 3280 | nestegg_track_audio_params(nestegg * ctx, unsigned int track, |
| 3281 | nestegg_audio_params * params) |
| 3282 | { |
| 3283 | struct track_entry * entry; |
| 3284 | uint64_t value; |
| 3285 | |
| 3286 | memset(params, 0, sizeof(*params)); |
| 3287 | |
| 3288 | entry = ne_find_track_entry(ctx, track); |
| 3289 | if (!entry) |
| 3290 | return -1; |
| 3291 | |
| 3292 | if (nestegg_track_type(ctx, track) != NESTEGG_TRACK_AUDIO1) |
| 3293 | return -1; |
| 3294 | |
| 3295 | ne_get_float(entry->audio.sampling_frequency, ¶ms->rate); |
| 3296 | |
| 3297 | if (ne_get_uint(entry->audio.channels, &value) == 0) |
| 3298 | params->channels = value; |
| 3299 | |
| 3300 | /* BitDepth has no declared default; 16 is nestegg API policy. The |
| 3301 | descriptor marks it DESC_FLAG_ACCESSOR_DEFAULT so that a zero-length |
| 3302 | BitDepth reads back as 16 too, rather than as an out-of-range 0. */ |
| 3303 | value = 16; |
| 3304 | ne_get_uint(entry->audio.bit_depth, &value); |
| 3305 | params->depth = value; |
| 3306 | |
| 3307 | if (ne_get_uint(entry->codec_delay, &value) == 0) |
| 3308 | params->codec_delay = value; |
| 3309 | |
| 3310 | if (ne_get_uint(entry->seek_preroll, &value) == 0) |
| 3311 | params->seek_preroll = value; |
| 3312 | |
| 3313 | return 0; |
| 3314 | } |
| 3315 | |
| 3316 | int |
| 3317 | nestegg_track_encoding(nestegg * ctx, unsigned int track) |
| 3318 | { |
| 3319 | struct track_entry * entry; |
| 3320 | struct content_encoding * encoding; |
| 3321 | uint64_t encoding_value; |
| 3322 | |
| 3323 | entry = ne_find_track_entry(ctx, track); |
| 3324 | if (!entry) { |
| 3325 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "No track entry found"); |
| 3326 | return -1; |
| 3327 | } |
| 3328 | |
| 3329 | if (!entry->content_encodings.content_encoding.head) { |
| 3330 | /* Default encoding is compression */ |
| 3331 | return NESTEGG_ENCODING_COMPRESSION0; |
| 3332 | } |
| 3333 | |
| 3334 | encoding = entry->content_encodings.content_encoding.head->data; |
| 3335 | |
| 3336 | encoding_value = NESTEGG_ENCODING_COMPRESSION0; |
| 3337 | ne_get_uint(encoding->content_encoding_type, &encoding_value); |
| 3338 | if (encoding_value != NESTEGG_ENCODING_COMPRESSION0 && encoding_value != NESTEGG_ENCODING_ENCRYPTION1) { |
| 3339 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "Invalid ContentEncoding element found"); |
| 3340 | return -1; |
| 3341 | } |
| 3342 | |
| 3343 | return encoding_value; |
| 3344 | } |
| 3345 | |
| 3346 | int |
| 3347 | nestegg_track_content_enc_key_id(nestegg * ctx, unsigned int track, unsigned char const ** content_enc_key_id, |
| 3348 | size_t * content_enc_key_id_length) |
| 3349 | { |
| 3350 | struct track_entry * entry; |
| 3351 | struct content_encoding * encoding; |
| 3352 | struct content_encryption * encryption; |
| 3353 | struct content_enc_aes_settings * aes_settings; |
| 3354 | struct nestegg_encryption_params; |
| 3355 | uint64_t value; |
| 3356 | struct ebml_binary enc_key_id; |
| 3357 | |
| 3358 | entry = ne_find_track_entry(ctx, track); |
| 3359 | if (!entry) { |
| 3360 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "No track entry found"); |
| 3361 | return -1; |
| 3362 | } |
| 3363 | |
| 3364 | if (!entry->content_encodings.content_encoding.head) { |
| 3365 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "No ContentEncoding element found"); |
| 3366 | return -1; |
| 3367 | } |
| 3368 | |
| 3369 | encoding = entry->content_encodings.content_encoding.head->data; |
| 3370 | |
| 3371 | value = 0; |
| 3372 | ne_get_uint(encoding->content_encoding_type, &value); |
| 3373 | if (value != NESTEGG_ENCODING_ENCRYPTION1) { |
| 3374 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "Disallowed ContentEncodingType found"); |
| 3375 | return -1; |
| 3376 | } |
| 3377 | |
| 3378 | if (!encoding->content_encryption.head) { |
| 3379 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "No ContentEncryption element found"); |
| 3380 | return -1; |
| 3381 | } |
| 3382 | |
| 3383 | encryption = encoding->content_encryption.head->data; |
| 3384 | |
| 3385 | value = 0; |
| 3386 | ne_get_uint(encryption->content_enc_algo, &value); |
| 3387 | |
| 3388 | if (value != CONTENT_ENC_ALGO_AES5) { |
| 3389 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "Disallowed ContentEncAlgo found"); |
| 3390 | return -1; |
| 3391 | } |
| 3392 | |
| 3393 | if (!encryption->content_enc_aes_settings.head) { |
| 3394 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "No ContentEncAesSettings element found"); |
| 3395 | return -1; |
| 3396 | } |
| 3397 | |
| 3398 | aes_settings = encryption->content_enc_aes_settings.head->data; |
| 3399 | value = AES_SETTINGS_CIPHER_CTR1; |
| 3400 | ne_get_uint(aes_settings->aes_settings_cipher_mode, &value); |
| 3401 | |
| 3402 | if (value != AES_SETTINGS_CIPHER_CTR1) { |
| 3403 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "Disallowed AESSettingCipherMode used"); |
| 3404 | return -1; |
| 3405 | } |
| 3406 | |
| 3407 | if (ne_get_binary(encryption->content_enc_key_id, &enc_key_id) != 0) { |
| 3408 | ctx->log(ctx, NESTEGG_LOG_ERROR1000, "Could not retrieve track ContentEncKeyId"); |
| 3409 | return -1; |
| 3410 | } |
| 3411 | |
| 3412 | *content_enc_key_id = enc_key_id.data; |
| 3413 | *content_enc_key_id_length = enc_key_id.length; |
| 3414 | |
| 3415 | return 0; |
| 3416 | } |
| 3417 | |
| 3418 | int |
| 3419 | nestegg_track_default_duration(nestegg * ctx, unsigned int track, |
| 3420 | uint64_t * duration) |
| 3421 | { |
| 3422 | struct track_entry * entry; |
| 3423 | uint64_t value; |
| 3424 | |
| 3425 | entry = ne_find_track_entry(ctx, track); |
| 3426 | if (!entry) |
| 3427 | return -1; |
| 3428 | |
| 3429 | if (ne_get_uint(entry->default_duration, &value) != 0) |
| 3430 | return -1; |
| 3431 | *duration = value; |
| 3432 | |
| 3433 | return 0; |
| 3434 | } |
| 3435 | |
| 3436 | int |
| 3437 | nestegg_read_reset(nestegg * ctx) |
| 3438 | { |
| 3439 | assert(ctx->ancestor == NULL)((void) sizeof ((ctx->ancestor == ((void*)0)) ? 1 : 0), __extension__ ({ if (ctx->ancestor == ((void*)0)) ; else __assert_fail ( "ctx->ancestor == NULL", "./../../../../media/libnestegg/src/nestegg.c" , 3439, __extension__ __PRETTY_FUNCTION__); })); |
| 3440 | return ne_ctx_restore(ctx, &ctx->saved); |
| 3441 | } |
| 3442 | |
| 3443 | int |
| 3444 | nestegg_read_packet(nestegg * ctx, nestegg_packet ** pkt) |
| 3445 | { |
| 3446 | int r, read_block = 0; |
| 3447 | uint64_t id, size; |
| 3448 | |
| 3449 | *pkt = NULL((void*)0); |
| 3450 | |
| 3451 | assert(ctx->ancestor == NULL)((void) sizeof ((ctx->ancestor == ((void*)0)) ? 1 : 0), __extension__ ({ if (ctx->ancestor == ((void*)0)) ; else __assert_fail ( "ctx->ancestor == NULL", "./../../../../media/libnestegg/src/nestegg.c" , 3451, __extension__ __PRETTY_FUNCTION__); })); |
| 3452 | |
| 3453 | /* Prepare for read_reset to resume parsing from this point upon error. */ |
| 3454 | r = ne_ctx_save(ctx, &ctx->saved); |
| 3455 | if (r != 0) |
| 3456 | return -1; |
| 3457 | |
| 3458 | while (!read_block) { |
| 3459 | r = ne_read_element(ctx, &id, &size); |
| 3460 | if (r != 1) |
| 3461 | return r; |
| 3462 | |
| 3463 | switch (id) { |
| 3464 | case ID_CLUSTER0x1f43b675: { |
| 3465 | for (;;) { |
| 3466 | r = ne_read_element(ctx, &id, &size); |
| 3467 | if (r != 1) |
| 3468 | return r; |
| 3469 | |
| 3470 | if (id == ID_TIMECODE0xe7) |
| 3471 | break; |
| 3472 | |
| 3473 | /* Block elements cannot precede the Timecode. */ |
| 3474 | if (id == ID_SIMPLE_BLOCK0xa3 || id == ID_BLOCK_GROUP0xa0) |
| 3475 | return -1; |
| 3476 | |
| 3477 | r = ne_io_read_skip(&ctx->io, size); |
| 3478 | if (r != 1) |
| 3479 | return r; |
| 3480 | } |
| 3481 | |
| 3482 | r = ne_read_uint(&ctx->io, &ctx->cluster_timecode, size); |
| 3483 | if (r != 1) |
| 3484 | return r; |
| 3485 | ctx->read_cluster_timecode = 1; |
| 3486 | break; |
| 3487 | } |
| 3488 | case ID_SIMPLE_BLOCK0xa3: |
| 3489 | r = ne_read_block(ctx, id, size, pkt); |
| 3490 | if (r != 1) |
| 3491 | return r; |
| 3492 | (*pkt)->end_offset = ne_io_tell(&ctx->io); |
| 3493 | if ((*pkt)->end_offset < 0) { |
| 3494 | nestegg_free_packet(*pkt); |
| 3495 | *pkt = NULL((void*)0); |
| 3496 | return -1; |
| 3497 | } |
| 3498 | |
| 3499 | read_block = 1; |
| 3500 | break; |
| 3501 | case ID_BLOCK_GROUP0xa0: { |
| 3502 | int64_t block_group_end; |
| 3503 | uint64_t block_duration = 0; |
| 3504 | int read_block_duration = 0; |
| 3505 | int64_t discard_padding = 0; |
| 3506 | int read_discard_padding = 0; |
| 3507 | int64_t reference_block = 0; |
| 3508 | int read_reference_block = 0; |
| 3509 | struct block_additional * block_additional = NULL((void*)0); |
| 3510 | uint64_t tc_scale; |
| 3511 | |
| 3512 | block_group_end = ne_io_tell(&ctx->io); |
| 3513 | if (block_group_end < 0) |
| 3514 | return -1; |
| 3515 | block_group_end += size; |
| 3516 | |
| 3517 | /* Read the entire BlockGroup manually. */ |
| 3518 | while (1) { |
| 3519 | int64_t pos = ne_io_tell(&ctx->io); |
| 3520 | if (pos < 0) { |
| 3521 | ne_free_block_additions(block_additional); |
| 3522 | if (*pkt) { |
| 3523 | nestegg_free_packet(*pkt); |
| 3524 | *pkt = NULL((void*)0); |
| 3525 | } |
| 3526 | return -1; |
| 3527 | } |
| 3528 | if (pos >= block_group_end) |
| 3529 | break; |
| 3530 | r = ne_read_element(ctx, &id, &size); |
| 3531 | if (r != 1) { |
| 3532 | ne_free_block_additions(block_additional); |
| 3533 | if (*pkt) { |
| 3534 | nestegg_free_packet(*pkt); |
| 3535 | *pkt = NULL((void*)0); |
| 3536 | } |
| 3537 | return r; |
| 3538 | } |
| 3539 | |
| 3540 | switch (id) { |
| 3541 | case ID_BLOCK0xa1: { |
| 3542 | if (*pkt) { |
| 3543 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, |
| 3544 | "read_packet: multiple Blocks in BlockGroup, dropping previously read Block"); |
| 3545 | nestegg_free_packet(*pkt); |
| 3546 | } |
| 3547 | r = ne_read_block(ctx, id, size, pkt); |
| 3548 | if (r != 1) { |
| 3549 | ne_free_block_additions(block_additional); |
| 3550 | if (*pkt) { |
| 3551 | nestegg_free_packet(*pkt); |
| 3552 | *pkt = NULL((void*)0); |
| 3553 | } |
| 3554 | return r; |
| 3555 | } |
| 3556 | |
| 3557 | read_block = 1; |
| 3558 | break; |
| 3559 | } |
| 3560 | case ID_BLOCK_DURATION0x9b: { |
| 3561 | r = ne_read_uint(&ctx->io, &block_duration, size); |
| 3562 | if (r != 1) { |
| 3563 | ne_free_block_additions(block_additional); |
| 3564 | if (*pkt) { |
| 3565 | nestegg_free_packet(*pkt); |
| 3566 | *pkt = NULL((void*)0); |
| 3567 | } |
| 3568 | return r; |
| 3569 | } |
| 3570 | tc_scale = ne_get_timecode_scale(ctx); |
| 3571 | if (tc_scale == 0) { |
| 3572 | ne_free_block_additions(block_additional); |
| 3573 | if (*pkt) { |
| 3574 | nestegg_free_packet(*pkt); |
| 3575 | *pkt = NULL((void*)0); |
| 3576 | } |
| 3577 | return -1; |
| 3578 | } |
| 3579 | block_duration = ne_saturate_mul_uint64(block_duration, tc_scale); |
| 3580 | read_block_duration = 1; |
| 3581 | break; |
| 3582 | } |
| 3583 | case ID_DISCARD_PADDING0x75a2: { |
| 3584 | r = ne_read_int(&ctx->io, &discard_padding, size); |
| 3585 | if (r != 1) { |
| 3586 | ne_free_block_additions(block_additional); |
| 3587 | if (*pkt) { |
| 3588 | nestegg_free_packet(*pkt); |
| 3589 | *pkt = NULL((void*)0); |
| 3590 | } |
| 3591 | return r; |
| 3592 | } |
| 3593 | read_discard_padding = 1; |
| 3594 | break; |
| 3595 | } |
| 3596 | case ID_BLOCK_ADDITIONS0x75a1: { |
| 3597 | /* There should only be one BlockAdditions; treat multiple as an error. */ |
| 3598 | if (block_additional) { |
| 3599 | ne_free_block_additions(block_additional); |
| 3600 | if (*pkt) { |
| 3601 | nestegg_free_packet(*pkt); |
| 3602 | *pkt = NULL((void*)0); |
| 3603 | } |
| 3604 | return -1; |
| 3605 | } |
| 3606 | r = ne_read_block_additions(ctx, size, &block_additional); |
| 3607 | if (r != 1) { |
| 3608 | ne_free_block_additions(block_additional); |
| 3609 | if (*pkt) { |
| 3610 | nestegg_free_packet(*pkt); |
| 3611 | *pkt = NULL((void*)0); |
| 3612 | } |
| 3613 | return r; |
| 3614 | } |
| 3615 | break; |
| 3616 | } |
| 3617 | case ID_REFERENCE_BLOCK0xfb: { |
| 3618 | r = ne_read_int(&ctx->io, &reference_block, size); |
| 3619 | if (r != 1) { |
| 3620 | ne_free_block_additions(block_additional); |
| 3621 | if (*pkt) { |
| 3622 | nestegg_free_packet(*pkt); |
| 3623 | *pkt = NULL((void*)0); |
| 3624 | } |
| 3625 | return r; |
| 3626 | } |
| 3627 | read_reference_block = 1; |
| 3628 | break; |
| 3629 | } |
| 3630 | default: |
| 3631 | /* We don't know what this element is, so skip over it */ |
| 3632 | if (id != ID_VOID0xec && id != ID_CRC320xbf) |
| 3633 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, |
| 3634 | "read_packet: unknown element %llx in BlockGroup", id); |
| 3635 | r = ne_io_read_skip(&ctx->io, size); |
| 3636 | if (r != 1) { |
| 3637 | ne_free_block_additions(block_additional); |
| 3638 | if (*pkt) { |
| 3639 | nestegg_free_packet(*pkt); |
| 3640 | *pkt = NULL((void*)0); |
| 3641 | } |
| 3642 | return r; |
| 3643 | } |
| 3644 | } |
| 3645 | } |
| 3646 | |
| 3647 | assert(read_block == (*pkt != NULL))((void) sizeof ((read_block == (*pkt != ((void*)0))) ? 1 : 0) , __extension__ ({ if (read_block == (*pkt != ((void*)0))) ; else __assert_fail ("read_block == (*pkt != NULL)", "./../../../../media/libnestegg/src/nestegg.c" , 3647, __extension__ __PRETTY_FUNCTION__); })); |
| 3648 | if (*pkt) { |
| 3649 | (*pkt)->end_offset = ne_io_tell(&ctx->io); |
| 3650 | if ((*pkt)->end_offset < 0) { |
| 3651 | ne_free_block_additions(block_additional); |
| 3652 | nestegg_free_packet(*pkt); |
| 3653 | *pkt = NULL((void*)0); |
| 3654 | return -1; |
| 3655 | } |
| 3656 | (*pkt)->duration = block_duration; |
| 3657 | (*pkt)->read_duration = read_block_duration; |
| 3658 | (*pkt)->discard_padding = discard_padding; |
| 3659 | (*pkt)->read_discard_padding = read_discard_padding; |
| 3660 | (*pkt)->reference_block = reference_block; |
| 3661 | (*pkt)->read_reference_block = read_reference_block; |
| 3662 | (*pkt)->block_additional = block_additional; |
| 3663 | if ((*pkt)->read_reference_block) |
| 3664 | /* If a packet has a reference block it contains |
| 3665 | predictive frames and no keyframes */ |
| 3666 | (*pkt)->keyframe = NESTEGG_PACKET_HAS_KEYFRAME_FALSE0; |
| 3667 | } else { |
| 3668 | ne_free_block_additions(block_additional); |
| 3669 | } |
| 3670 | break; |
| 3671 | } |
| 3672 | default: |
| 3673 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, "read_packet: unknown element %llx", id); |
| 3674 | r = ne_io_read_skip(&ctx->io, size); |
| 3675 | if (r != 1) |
| 3676 | return r; |
| 3677 | } |
| 3678 | } |
| 3679 | |
| 3680 | return 1; |
| 3681 | } |
| 3682 | |
| 3683 | int |
| 3684 | nestegg_read_last_packet(nestegg * context, unsigned int track, |
| 3685 | nestegg_packet ** packet) |
| 3686 | { |
| 3687 | struct saved_state saved; |
| 3688 | uint64_t max_end_ns = 0; |
| 3689 | nestegg_packet * last_packet = NULL((void*)0); |
| 3690 | |
| 3691 | if (!context || !packet) { |
| 3692 | return -1; |
| 3693 | } |
| 3694 | |
| 3695 | *packet = NULL((void*)0); |
| 3696 | |
| 3697 | /* Save and restore the parser state later. */ |
| 3698 | if (ne_ctx_save(context, &saved) != 0) |
| 3699 | return -1; |
| 3700 | |
| 3701 | for (;;) { |
| 3702 | nestegg_packet * pkt = NULL((void*)0); |
| 3703 | unsigned int pkt_track = 0; |
| 3704 | int r = nestegg_read_packet(context, &pkt); |
| 3705 | if (r == 0) { |
| 3706 | /* EOS */ |
| 3707 | break; |
| 3708 | } |
| 3709 | if (r < 0) { |
| 3710 | if (pkt) { |
| 3711 | nestegg_free_packet(pkt); |
| 3712 | } |
| 3713 | if (last_packet) { |
| 3714 | nestegg_free_packet(last_packet); |
| 3715 | last_packet = NULL((void*)0); |
| 3716 | } |
| 3717 | if (ne_ctx_restore(context, &saved) != 0) |
| 3718 | return -1; |
| 3719 | return -1; |
| 3720 | } |
| 3721 | |
| 3722 | if (nestegg_packet_track(pkt, &pkt_track) == 0 && pkt_track == track) { |
| 3723 | /* Calculate the end timestamp of this packet */ |
| 3724 | uint64_t ts = 0; |
| 3725 | uint64_t dur = 0; |
| 3726 | uint64_t end_ns = 0; |
| 3727 | nestegg_packet_tstamp(pkt, &ts); |
| 3728 | if (nestegg_packet_duration(pkt, &dur) != 0) { |
| 3729 | dur = 0; |
| 3730 | } |
| 3731 | end_ns = ts + dur; |
| 3732 | if (end_ns >= max_end_ns) { |
| 3733 | if (last_packet) { |
| 3734 | nestegg_free_packet(last_packet); |
| 3735 | } |
| 3736 | last_packet = pkt; |
| 3737 | max_end_ns = end_ns; |
| 3738 | pkt = NULL((void*)0); |
| 3739 | } |
| 3740 | } |
| 3741 | |
| 3742 | if (pkt) { |
| 3743 | nestegg_free_packet(pkt); |
| 3744 | } |
| 3745 | } |
| 3746 | |
| 3747 | if (ne_ctx_restore(context, &saved) != 0) { |
| 3748 | if (last_packet) |
| 3749 | nestegg_free_packet(last_packet); |
| 3750 | return -1; |
| 3751 | } |
| 3752 | |
| 3753 | if (!last_packet) { |
| 3754 | return -1; |
| 3755 | } |
| 3756 | *packet = last_packet; |
| 3757 | return 0; |
| 3758 | } |
| 3759 | |
| 3760 | void |
| 3761 | nestegg_free_packet(nestegg_packet * pkt) |
| 3762 | { |
| 3763 | unsigned int i; |
| 3764 | |
| 3765 | for (i = 0; i < pkt->frame_count; ++i) |
| 3766 | ne_free_frame(pkt->frames[i]); |
| 3767 | free(pkt->frames); |
| 3768 | |
| 3769 | ne_free_block_additions(pkt->block_additional); |
| 3770 | |
| 3771 | free(pkt); |
| 3772 | } |
| 3773 | |
| 3774 | int |
| 3775 | nestegg_packet_has_keyframe(nestegg_packet * pkt) |
| 3776 | { |
| 3777 | return pkt->keyframe; |
| 3778 | } |
| 3779 | |
| 3780 | int |
| 3781 | nestegg_packet_track(nestegg_packet * pkt, unsigned int * track) |
| 3782 | { |
| 3783 | *track = pkt->track; |
| 3784 | return 0; |
| 3785 | } |
| 3786 | |
| 3787 | int |
| 3788 | nestegg_packet_tstamp(nestegg_packet * pkt, uint64_t * tstamp) |
| 3789 | { |
| 3790 | *tstamp = pkt->timecode; |
| 3791 | return 0; |
| 3792 | } |
| 3793 | |
| 3794 | int |
| 3795 | nestegg_packet_duration(nestegg_packet * pkt, uint64_t * duration) |
| 3796 | { |
| 3797 | if (!pkt->read_duration) |
| 3798 | return -1; |
| 3799 | *duration = pkt->duration; |
| 3800 | return 0; |
| 3801 | } |
| 3802 | |
| 3803 | int |
| 3804 | nestegg_packet_discard_padding(nestegg_packet * pkt, int64_t * discard_padding) |
| 3805 | { |
| 3806 | if (!pkt->read_discard_padding) |
| 3807 | return -1; |
| 3808 | *discard_padding = pkt->discard_padding; |
| 3809 | return 0; |
| 3810 | } |
| 3811 | |
| 3812 | int |
| 3813 | nestegg_packet_reference_block(nestegg_packet * pkt, int64_t * reference_block) |
| 3814 | { |
| 3815 | if (!pkt->read_reference_block) |
| 3816 | return -1; |
| 3817 | *reference_block = pkt->reference_block; |
| 3818 | return 0; |
| 3819 | } |
| 3820 | |
| 3821 | int |
| 3822 | nestegg_packet_end_offset(nestegg_packet * pkt, int64_t * end_offset) |
| 3823 | { |
| 3824 | *end_offset = pkt->end_offset; |
| 3825 | return 0; |
| 3826 | } |
| 3827 | |
| 3828 | int |
| 3829 | nestegg_packet_count(nestegg_packet * pkt, unsigned int * count) |
| 3830 | { |
| 3831 | *count = pkt->frame_count; |
| 3832 | return 0; |
| 3833 | } |
| 3834 | |
| 3835 | int |
| 3836 | nestegg_packet_data(nestegg_packet * pkt, unsigned int item, |
| 3837 | unsigned char ** data, size_t * length) |
| 3838 | { |
| 3839 | struct frame * f; |
| 3840 | |
| 3841 | *data = NULL((void*)0); |
| 3842 | *length = 0; |
| 3843 | |
| 3844 | if (item >= pkt->frame_count) |
| 3845 | return -1; |
| 3846 | |
| 3847 | f = pkt->frames[item]; |
| 3848 | *data = f->data; |
| 3849 | *length = f->length; |
| 3850 | return 0; |
| 3851 | } |
| 3852 | |
| 3853 | int |
| 3854 | nestegg_packet_additional_data(nestegg_packet * pkt, unsigned int id, |
| 3855 | unsigned char ** data, size_t * length) |
| 3856 | { |
| 3857 | struct block_additional * a = pkt->block_additional; |
| 3858 | |
| 3859 | *data = NULL((void*)0); |
| 3860 | *length = 0; |
| 3861 | |
| 3862 | while (a) { |
| 3863 | if (a->id == id) { |
| 3864 | *data = a->data; |
| 3865 | *length = a->length; |
| 3866 | return 0; |
| 3867 | } |
| 3868 | a = a->next; |
| 3869 | } |
| 3870 | |
| 3871 | return -1; |
| 3872 | } |
| 3873 | |
| 3874 | int |
| 3875 | nestegg_packet_encryption(nestegg_packet * pkt) |
| 3876 | { |
| 3877 | struct frame * f = pkt->frames[0]; |
| 3878 | unsigned char encrypted_bit; |
| 3879 | unsigned char partitioned_bit; |
| 3880 | |
| 3881 | if (!f->frame_encryption) |
| 3882 | return NESTEGG_PACKET_HAS_SIGNAL_BYTE_FALSE0; |
| 3883 | |
| 3884 | /* Should never have parsed blocks with both encryption and lacing */ |
| 3885 | assert(pkt->frame_count == 1)((void) sizeof ((pkt->frame_count == 1) ? 1 : 0), __extension__ ({ if (pkt->frame_count == 1) ; else __assert_fail ("pkt->frame_count == 1" , "./../../../../media/libnestegg/src/nestegg.c", 3885, __extension__ __PRETTY_FUNCTION__); })); |
| 3886 | |
| 3887 | encrypted_bit = f->frame_encryption->signal_byte & ENCRYPTED_BIT_MASK(1 << 0); |
| 3888 | partitioned_bit = f->frame_encryption->signal_byte & PARTITIONED_BIT_MASK(1 << 1); |
| 3889 | |
| 3890 | if (encrypted_bit != PACKET_ENCRYPTED1) |
| 3891 | return NESTEGG_PACKET_HAS_SIGNAL_BYTE_UNENCRYPTED1; |
| 3892 | |
| 3893 | if (partitioned_bit == PACKET_PARTITIONED2) |
| 3894 | return NESTEGG_PACKET_HAS_SIGNAL_BYTE_PARTITIONED4; |
| 3895 | |
| 3896 | return NESTEGG_PACKET_HAS_SIGNAL_BYTE_ENCRYPTED2; |
| 3897 | } |
| 3898 | |
| 3899 | int |
| 3900 | nestegg_packet_iv(nestegg_packet * pkt, unsigned char const ** iv, size_t * length) |
| 3901 | { |
| 3902 | struct frame * f = pkt->frames[0]; |
| 3903 | unsigned char encrypted_bit; |
| 3904 | |
| 3905 | *iv = NULL((void*)0); |
| 3906 | *length = 0; |
| 3907 | if (!f->frame_encryption) |
| 3908 | return -1; |
| 3909 | |
| 3910 | /* Should never have parsed blocks with both encryption and lacing */ |
| 3911 | assert(pkt->frame_count == 1)((void) sizeof ((pkt->frame_count == 1) ? 1 : 0), __extension__ ({ if (pkt->frame_count == 1) ; else __assert_fail ("pkt->frame_count == 1" , "./../../../../media/libnestegg/src/nestegg.c", 3911, __extension__ __PRETTY_FUNCTION__); })); |
| 3912 | |
| 3913 | encrypted_bit = f->frame_encryption->signal_byte & ENCRYPTED_BIT_MASK(1 << 0); |
| 3914 | |
| 3915 | if (encrypted_bit != PACKET_ENCRYPTED1) |
| 3916 | return 0; |
| 3917 | |
| 3918 | *iv = f->frame_encryption->iv; |
| 3919 | *length = f->frame_encryption->length; |
| 3920 | return 0; |
| 3921 | } |
| 3922 | |
| 3923 | int |
| 3924 | nestegg_packet_offsets(nestegg_packet * pkt, |
| 3925 | uint32_t const ** partition_offsets, |
| 3926 | uint8_t * num_partitions) |
| 3927 | { |
| 3928 | struct frame * f = pkt->frames[0]; |
| 3929 | unsigned char encrypted_bit; |
| 3930 | unsigned char partitioned_bit; |
| 3931 | |
| 3932 | *partition_offsets = NULL((void*)0); |
| 3933 | *num_partitions = 0; |
| 3934 | |
| 3935 | if (!f->frame_encryption) |
| 3936 | return -1; |
| 3937 | |
| 3938 | /* Should never have parsed blocks with both encryption and lacing */ |
| 3939 | assert(pkt->frame_count == 1)((void) sizeof ((pkt->frame_count == 1) ? 1 : 0), __extension__ ({ if (pkt->frame_count == 1) ; else __assert_fail ("pkt->frame_count == 1" , "./../../../../media/libnestegg/src/nestegg.c", 3939, __extension__ __PRETTY_FUNCTION__); })); |
| 3940 | |
| 3941 | encrypted_bit = f->frame_encryption->signal_byte & ENCRYPTED_BIT_MASK(1 << 0); |
| 3942 | partitioned_bit = f->frame_encryption->signal_byte & PARTITIONED_BIT_MASK(1 << 1); |
| 3943 | |
| 3944 | if (encrypted_bit != PACKET_ENCRYPTED1 || partitioned_bit != PACKET_PARTITIONED2) |
| 3945 | return -1; |
| 3946 | |
| 3947 | *num_partitions = f->frame_encryption->num_partitions; |
| 3948 | *partition_offsets = f->frame_encryption->partition_offsets; |
| 3949 | return 0; |
| 3950 | } |
| 3951 | |
| 3952 | int |
| 3953 | nestegg_has_cues(nestegg * ctx) |
| 3954 | { |
| 3955 | return ctx->segment.cues.cue_point.head || |
| 3956 | ne_find_seek_for_id(ctx->segment.seek_head.head, ID_CUES0x1c53bb6b); |
| 3957 | } |
| 3958 | |
| 3959 | static int ne_sniff(unsigned char const* buffer, size_t length, |
| 3960 | const char* doc_type) |
| 3961 | { |
| 3962 | nestegg_io io; |
| 3963 | struct io_buffer userdata; |
| 3964 | |
| 3965 | userdata.buffer = buffer; |
| 3966 | userdata.length = length; |
| 3967 | userdata.offset = 0; |
| 3968 | |
| 3969 | io.read = ne_buffer_read; |
| 3970 | io.seek = ne_buffer_seek; |
| 3971 | io.tell = ne_buffer_tell; |
| 3972 | io.userdata = &userdata; |
| 3973 | return ne_match_doc_type(io, length, doc_type); |
| 3974 | } |
| 3975 | |
| 3976 | int nestegg_sniff_webm(unsigned char const* buffer, size_t length) |
| 3977 | { |
| 3978 | return ne_sniff(buffer, length, DOCTYPE_WEBM"webm"); |
| 3979 | } |
| 3980 | |
| 3981 | int nestegg_sniff_mkv(unsigned char const* buffer, size_t length) |
| 3982 | { |
| 3983 | return ne_sniff(buffer, length, DOCTYPE_MKV"matroska"); |
| 3984 | } |
| 3985 | |
| 3986 | /* Count frames in a Block/SimpleBlock from its lacing header, then skip the |
| 3987 | remaining payload. Sets frames_out on success; returns 1 on success, <0 on error. */ |
| 3988 | static int |
| 3989 | ne_read_block_lacing(nestegg * ctx, uint64_t block_size, uint64_t* frames_out) |
| 3990 | { |
| 3991 | int r; |
| 3992 | int64_t timecode; |
| 3993 | uint64_t track_number, length, flags, frames, header_bytes, remaining; |
| 3994 | unsigned int lacing; |
| 3995 | |
| 3996 | if (block_size > LIMIT_BLOCK(1 << 30)) |
| 3997 | return -1; |
| 3998 | |
| 3999 | r = ne_read_vint(&ctx->io, &track_number, &length); |
| 4000 | if (r != 1) |
| 4001 | return r; |
| 4002 | |
| 4003 | if (track_number == 0) |
| 4004 | return -1; |
| 4005 | |
| 4006 | r = ne_read_int(&ctx->io, &timecode, 2); |
| 4007 | if (r != 1) |
| 4008 | return r; |
| 4009 | |
| 4010 | r = ne_read_uint(&ctx->io, &flags, 1); |
| 4011 | if (r != 1) |
| 4012 | return r; |
| 4013 | |
| 4014 | frames = 0; |
| 4015 | lacing = (flags & BLOCK_FLAGS_LACING6) >> 1; |
| 4016 | |
| 4017 | switch (lacing) { |
| 4018 | case LACING_NONE0: |
| 4019 | frames = 1; |
| 4020 | break; |
| 4021 | case LACING_XIPH1: |
| 4022 | case LACING_FIXED2: |
| 4023 | case LACING_EBML3: |
| 4024 | r = ne_read_uint(&ctx->io, &frames, 1); |
| 4025 | if (r != 1) |
| 4026 | return r; |
| 4027 | frames += 1; |
| 4028 | break; |
| 4029 | default: |
| 4030 | assert(0)((void) sizeof ((0) ? 1 : 0), __extension__ ({ if (0) ; else __assert_fail ("0", "./../../../../media/libnestegg/src/nestegg.c", 4030, __extension__ __PRETTY_FUNCTION__); })); |
| 4031 | return -1; |
| 4032 | } |
| 4033 | |
| 4034 | if (frames > 256) |
| 4035 | return -1; |
| 4036 | |
| 4037 | /* Skip the remainder of the block payload. */ |
| 4038 | header_bytes = length + 2 + 1 + (lacing == LACING_NONE0 ? 0 : 1); |
| 4039 | if (block_size < header_bytes) |
| 4040 | return -1; |
| 4041 | remaining = block_size - header_bytes; |
| 4042 | if (remaining) { |
| 4043 | r = ne_io_read_skip(&ctx->io, remaining); |
| 4044 | if (r != 1) |
| 4045 | return r; |
| 4046 | } |
| 4047 | |
| 4048 | *frames_out = frames; |
| 4049 | return 1; |
| 4050 | } |
| 4051 | |
| 4052 | /* Consume the payload of a SimpleBlock or BlockGroup: |
| 4053 | - If block-like, count frames via lacing and add to frames_out. |
| 4054 | - If not, skip the payload. |
| 4055 | Always advances I/O to the end of the element. |
| 4056 | Returns 1 on success, <0 on error. */ |
| 4057 | static int |
| 4058 | ne_sum_block_or_group(nestegg * ctx, uint64_t id, uint64_t size, uint64_t * frames_out) |
| 4059 | { |
| 4060 | int r; |
| 4061 | |
| 4062 | if (id == ID_SIMPLE_BLOCK0xa3) { |
| 4063 | uint64_t frames; |
| 4064 | frames = 0; |
| 4065 | r = ne_read_block_lacing(ctx, size, &frames); |
| 4066 | if (r != 1) |
| 4067 | return r; |
| 4068 | *frames_out += frames; |
| 4069 | return 1; |
| 4070 | } |
| 4071 | |
| 4072 | if (id == ID_BLOCK_GROUP0xa0) { |
| 4073 | int64_t group_end; |
| 4074 | group_end = ne_io_tell(&ctx->io); |
| 4075 | if (group_end < 0) |
| 4076 | return -1; |
| 4077 | group_end += (int64_t) size; |
| 4078 | while (1) { |
| 4079 | uint64_t gid, gsize; |
| 4080 | int64_t pos = ne_io_tell(&ctx->io); |
| 4081 | if (pos < 0) |
| 4082 | return -1; |
| 4083 | if (pos >= group_end) |
| 4084 | break; |
| 4085 | r = ne_read_element(ctx, &gid, &gsize); |
| 4086 | if (r != 1) |
| 4087 | return r; |
| 4088 | |
| 4089 | if (gid == ID_BLOCK0xa1) { |
| 4090 | uint64_t frames; |
| 4091 | frames = 0; |
| 4092 | r = ne_read_block_lacing(ctx, gsize, &frames); |
| 4093 | if (r != 1) |
| 4094 | return r; |
| 4095 | *frames_out += frames; |
| 4096 | } else { |
| 4097 | r = ne_io_read_skip(&ctx->io, gsize); |
| 4098 | if (r != 1) |
| 4099 | return r; |
| 4100 | } |
| 4101 | } |
| 4102 | return 1; |
| 4103 | } |
| 4104 | |
| 4105 | /* Not a block-like element: skip its payload. */ |
| 4106 | r = ne_io_read_skip(&ctx->io, size); |
| 4107 | if (r != 1) |
| 4108 | return r; |
| 4109 | |
| 4110 | return 1; |
| 4111 | } |
| 4112 | |
| 4113 | /* Returns non-zero if 'size' equals the EBML unknown-size pattern for any VINT |
| 4114 | length. Patterns (data bits all 1): 0x7F, 0x3FFF, 0x1FFFFF, 0x0FFFFFFF, |
| 4115 | 0x07FFFFFFFF, 0x03FFFFFFFFFF, 0x01FFFFFFFFFFFF, 0x00FFFFFFFFFFFFFF. */ |
| 4116 | static int |
| 4117 | ne_size_is_unknown(uint64_t size) |
| 4118 | { |
| 4119 | int len; |
| 4120 | for (len = 1; len <= 8; ++len) { |
| 4121 | uint64_t mask; |
| 4122 | if (len == 8) |
| 4123 | mask = 0x00FFFFFFFFFFFFFFULL; /* 56 data bits = all ones */ |
| 4124 | else |
| 4125 | mask = (1ULL << (7 * len)) - 1ULL; /* 7 data bits per byte */ |
| 4126 | if (size == mask) |
| 4127 | return 1; |
| 4128 | } |
| 4129 | return 0; |
| 4130 | } |
| 4131 | |
| 4132 | /* Read ONE Cluster and return the sum of frames of ALL SimpleBlock/Block in it. |
| 4133 | Returns 1 on success (Cluster found), 0 on clean EOS before any Cluster, |
| 4134 | <0 on error. */ |
| 4135 | static int |
| 4136 | ne_read_cluster_frames_count(nestegg * ctx, uint64_t * frames_out) |
| 4137 | { |
| 4138 | int r; |
| 4139 | uint64_t id, size; |
| 4140 | int64_t cluster_end; |
| 4141 | uint64_t totalFrames; |
| 4142 | |
| 4143 | assert(ctx->ancestor == NULL)((void) sizeof ((ctx->ancestor == ((void*)0)) ? 1 : 0), __extension__ ({ if (ctx->ancestor == ((void*)0)) ; else __assert_fail ( "ctx->ancestor == NULL", "./../../../../media/libnestegg/src/nestegg.c" , 4143, __extension__ __PRETTY_FUNCTION__); })); |
| 4144 | |
| 4145 | /* Find the next Cluster at the top level. */ |
| 4146 | for (;;) { |
| 4147 | r = ne_read_element(ctx, &id, &size); |
| 4148 | if (r == 0) |
| 4149 | return 0; /* EOS before any Cluster */ |
| 4150 | if (r != 1) |
| 4151 | return r; |
| 4152 | |
| 4153 | if (id != ID_CLUSTER0x1f43b675) { |
| 4154 | /* Not a Cluster: consume and keep scanning. */ |
| 4155 | r = ne_io_read_skip(&ctx->io, size); |
| 4156 | if (r != 1) |
| 4157 | return r; |
| 4158 | continue; |
| 4159 | } |
| 4160 | |
| 4161 | totalFrames = 0; |
| 4162 | |
| 4163 | if (ne_size_is_unknown(size)) { |
| 4164 | for (;;) { |
| 4165 | uint64_t nid, nsize; |
| 4166 | |
| 4167 | r = ne_peek_element(ctx, &nid, &nsize); |
| 4168 | if (r == 0) |
| 4169 | break; /* EOS ends the unknown-sized Cluster */ |
| 4170 | if (r != 1) |
| 4171 | return r; |
| 4172 | |
| 4173 | /* Stop at next top-level element without consuming it. */ |
| 4174 | if (nid == ID_EBML0x1a45dfa3 || |
| 4175 | nid == ID_SEGMENT0x18538067 || |
| 4176 | nid == ID_SEEK_HEAD0x114d9b74 || |
| 4177 | nid == ID_INFO0x1549a966 || |
| 4178 | nid == ID_TRACKS0x1654ae6b || |
| 4179 | nid == ID_CHAPTERS0x1043a770 || |
| 4180 | nid == ID_CLUSTER0x1f43b675 || |
| 4181 | nid == ID_CUES0x1c53bb6b || |
| 4182 | nid == ID_ATTACHMENTS0x1941a469 || |
| 4183 | nid == ID_TAGS0x1254c367) { |
| 4184 | break; |
| 4185 | } |
| 4186 | |
| 4187 | r = ne_read_element(ctx, &nid, &nsize); |
| 4188 | if (r != 1) |
| 4189 | return r; |
| 4190 | |
| 4191 | /* Sum frames for blocks; skip other children. */ |
| 4192 | r = ne_sum_block_or_group(ctx, nid, nsize, &totalFrames); |
| 4193 | if (r != 1) |
| 4194 | return r; |
| 4195 | } |
| 4196 | |
| 4197 | *frames_out = totalFrames; |
| 4198 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, |
| 4199 | "ne_read_cluster_frames_count: totalFrames=%llu (unknown-sized Cluster)", |
| 4200 | totalFrames); |
| 4201 | return 1; |
| 4202 | } |
| 4203 | |
| 4204 | /* Known-sized Cluster: read until cluster_end. */ |
| 4205 | cluster_end = ne_io_tell(&ctx->io); |
| 4206 | if (cluster_end < 0) |
| 4207 | return -1; |
| 4208 | cluster_end += (int64_t) size; |
| 4209 | |
| 4210 | while (1) { |
| 4211 | uint64_t cid, csize; |
| 4212 | int64_t pos = ne_io_tell(&ctx->io); |
| 4213 | if (pos < 0) |
| 4214 | return -1; |
| 4215 | if (pos >= cluster_end) |
| 4216 | break; |
| 4217 | r = ne_read_element(ctx, &cid, &csize); |
| 4218 | if (r != 1) |
| 4219 | return r; |
| 4220 | |
| 4221 | /* Sum frames for blocks; skip other children. */ |
| 4222 | r = ne_sum_block_or_group(ctx, cid, csize, &totalFrames); |
| 4223 | if (r != 1) |
| 4224 | return r; |
| 4225 | } |
| 4226 | |
| 4227 | *frames_out = totalFrames; |
| 4228 | ctx->log(ctx, NESTEGG_LOG_DEBUG1, |
| 4229 | "ne_read_cluster_frames_count: totalFrames=%llu", totalFrames); |
| 4230 | return 1; |
| 4231 | } |
| 4232 | } |
| 4233 | |
| 4234 | int |
| 4235 | nestegg_read_total_frames_count(nestegg * context, uint64_t * frames_out) |
| 4236 | { |
| 4237 | struct saved_state saved; |
| 4238 | uint64_t totalFrames; |
| 4239 | int r; |
| 4240 | |
| 4241 | if (!context || !frames_out) |
| 4242 | return -1; |
| 4243 | |
| 4244 | if (ne_ctx_save(context, &saved) != 0) |
| 4245 | return -1; |
| 4246 | |
| 4247 | totalFrames = 0; |
| 4248 | for (;;) { |
| 4249 | uint64_t clusterFrames; |
| 4250 | clusterFrames = 0; |
| 4251 | r = ne_read_cluster_frames_count(context, &clusterFrames); |
| 4252 | if (r == 0) { |
| 4253 | /* EOS */ |
| 4254 | break; |
| 4255 | } |
| 4256 | if (r < 0) { |
| 4257 | if (ne_ctx_restore(context, &saved) != 0) |
| 4258 | return -1; |
| 4259 | return -1; |
| 4260 | } |
| 4261 | totalFrames += clusterFrames; |
| 4262 | } |
| 4263 | |
| 4264 | if (ne_ctx_restore(context, &saved) != 0) |
| 4265 | return -1; |
| 4266 | |
| 4267 | *frames_out = totalFrames; |
| 4268 | return 0; |
| 4269 | } |