/libavformat/ape.c
C | 473 lines | 369 code | 67 blank | 37 comment | 71 complexity | f21a4043c9c1af7999fa469ebf9235c6 MD5 | raw file
1/* 2 * Monkey's Audio APE demuxer 3 * Copyright (c) 2007 Benjamin Zores <ben@geexbox.org> 4 * based upon libdemac from Dave Chapman. 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include <stdio.h> 24 25#include "libavutil/intreadwrite.h" 26#include "avformat.h" 27#include "internal.h" 28#include "apetag.h" 29 30/* The earliest and latest file formats supported by this library */ 31#define APE_MIN_VERSION 3800 32#define APE_MAX_VERSION 3990 33 34#define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit [OBSOLETE] 35#define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection [OBSOLETE] 36#define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // uint32 nPeakLevel after the header [OBSOLETE] 37#define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit [OBSOLETE] 38#define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level 39#define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored) 40 41#define APE_EXTRADATA_SIZE 6 42 43typedef struct APEFrame { 44 int64_t pos; 45 int nblocks; 46 int size; 47 int skip; 48 int64_t pts; 49} APEFrame; 50 51typedef struct APEContext { 52 /* Derived fields */ 53 uint32_t junklength; 54 uint32_t firstframe; 55 uint32_t totalsamples; 56 int currentframe; 57 APEFrame *frames; 58 59 /* Info from Descriptor Block */ 60 int16_t fileversion; 61 int16_t padding1; 62 uint32_t descriptorlength; 63 uint32_t headerlength; 64 uint32_t seektablelength; 65 uint32_t wavheaderlength; 66 uint32_t audiodatalength; 67 uint32_t audiodatalength_high; 68 uint32_t wavtaillength; 69 uint8_t md5[16]; 70 71 /* Info from Header Block */ 72 uint16_t compressiontype; 73 uint16_t formatflags; 74 uint32_t blocksperframe; 75 uint32_t finalframeblocks; 76 uint32_t totalframes; 77 uint16_t bps; 78 uint16_t channels; 79 uint32_t samplerate; 80 81 /* Seektable */ 82 uint32_t *seektable; 83 uint8_t *bittable; 84} APEContext; 85 86static int ape_probe(const AVProbeData * p) 87{ 88 int version = AV_RL16(p->buf+4); 89 if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' ')) 90 return 0; 91 92 if (version < APE_MIN_VERSION || version > APE_MAX_VERSION) 93 return AVPROBE_SCORE_MAX/4; 94 95 return AVPROBE_SCORE_MAX; 96} 97 98static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx) 99{ 100#ifdef DEBUG 101 int i; 102 103 av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n"); 104 av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion); 105 av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength); 106 av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength); 107 av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength); 108 av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength); 109 av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength); 110 av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high); 111 av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength); 112 av_log(s, AV_LOG_DEBUG, "md5 = "); 113 for (i = 0; i < 16; i++) 114 av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]); 115 av_log(s, AV_LOG_DEBUG, "\n"); 116 117 av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n"); 118 119 av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype); 120 av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags); 121 av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe); 122 av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks); 123 av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes); 124 av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps); 125 av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels); 126 av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate); 127 128 av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n"); 129 if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) { 130 av_log(s, AV_LOG_DEBUG, "No seektable\n"); 131 } else { 132 for (i = 0; i < ape_ctx->seektablelength / sizeof(uint32_t); i++) { 133 if (i < ape_ctx->totalframes - 1) { 134 av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32" (%"PRIu32" bytes)", 135 i, ape_ctx->seektable[i], 136 ape_ctx->seektable[i + 1] - ape_ctx->seektable[i]); 137 if (ape_ctx->bittable) 138 av_log(s, AV_LOG_DEBUG, " + %2d bits\n", 139 ape_ctx->bittable[i]); 140 av_log(s, AV_LOG_DEBUG, "\n"); 141 } else { 142 av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32"\n", i, ape_ctx->seektable[i]); 143 } 144 } 145 } 146 147 av_log(s, AV_LOG_DEBUG, "\nFrames\n\n"); 148 for (i = 0; i < ape_ctx->totalframes; i++) 149 av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8d (%d samples)\n", i, 150 ape_ctx->frames[i].pos, ape_ctx->frames[i].size, 151 ape_ctx->frames[i].nblocks); 152 153 av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n"); 154 av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength); 155 av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe); 156 av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples); 157#endif 158} 159 160static int ape_read_header(AVFormatContext * s) 161{ 162 AVIOContext *pb = s->pb; 163 APEContext *ape = s->priv_data; 164 AVStream *st; 165 uint32_t tag; 166 int i, ret; 167 int total_blocks, final_size = 0; 168 int64_t pts, file_size; 169 170 /* Skip any leading junk such as id3v2 tags */ 171 ape->junklength = avio_tell(pb); 172 173 tag = avio_rl32(pb); 174 if (tag != MKTAG('M', 'A', 'C', ' ')) 175 return AVERROR_INVALIDDATA; 176 177 ape->fileversion = avio_rl16(pb); 178 179 if (ape->fileversion < APE_MIN_VERSION || ape->fileversion > APE_MAX_VERSION) { 180 av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n", 181 ape->fileversion / 1000, (ape->fileversion % 1000) / 10); 182 return AVERROR_PATCHWELCOME; 183 } 184 185 if (ape->fileversion >= 3980) { 186 ape->padding1 = avio_rl16(pb); 187 ape->descriptorlength = avio_rl32(pb); 188 ape->headerlength = avio_rl32(pb); 189 ape->seektablelength = avio_rl32(pb); 190 ape->wavheaderlength = avio_rl32(pb); 191 ape->audiodatalength = avio_rl32(pb); 192 ape->audiodatalength_high = avio_rl32(pb); 193 ape->wavtaillength = avio_rl32(pb); 194 avio_read(pb, ape->md5, 16); 195 196 /* Skip any unknown bytes at the end of the descriptor. 197 This is for future compatibility */ 198 if (ape->descriptorlength > 52) 199 avio_skip(pb, ape->descriptorlength - 52); 200 201 /* Read header data */ 202 ape->compressiontype = avio_rl16(pb); 203 ape->formatflags = avio_rl16(pb); 204 ape->blocksperframe = avio_rl32(pb); 205 ape->finalframeblocks = avio_rl32(pb); 206 ape->totalframes = avio_rl32(pb); 207 ape->bps = avio_rl16(pb); 208 ape->channels = avio_rl16(pb); 209 ape->samplerate = avio_rl32(pb); 210 } else { 211 ape->descriptorlength = 0; 212 ape->headerlength = 32; 213 214 ape->compressiontype = avio_rl16(pb); 215 ape->formatflags = avio_rl16(pb); 216 ape->channels = avio_rl16(pb); 217 ape->samplerate = avio_rl32(pb); 218 ape->wavheaderlength = avio_rl32(pb); 219 ape->wavtaillength = avio_rl32(pb); 220 ape->totalframes = avio_rl32(pb); 221 ape->finalframeblocks = avio_rl32(pb); 222 223 if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) { 224 avio_skip(pb, 4); /* Skip the peak level */ 225 ape->headerlength += 4; 226 } 227 228 if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) { 229 ape->seektablelength = avio_rl32(pb); 230 ape->headerlength += 4; 231 ape->seektablelength *= sizeof(int32_t); 232 } else 233 ape->seektablelength = ape->totalframes * sizeof(int32_t); 234 235 if (ape->formatflags & MAC_FORMAT_FLAG_8_BIT) 236 ape->bps = 8; 237 else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT) 238 ape->bps = 24; 239 else 240 ape->bps = 16; 241 242 if (ape->fileversion >= 3950) 243 ape->blocksperframe = 73728 * 4; 244 else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000)) 245 ape->blocksperframe = 73728; 246 else 247 ape->blocksperframe = 9216; 248 249 /* Skip any stored wav header */ 250 if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER)) 251 avio_skip(pb, ape->wavheaderlength); 252 } 253 254 if(!ape->totalframes){ 255 av_log(s, AV_LOG_ERROR, "No frames in the file!\n"); 256 return AVERROR(EINVAL); 257 } 258 if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){ 259 av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n", 260 ape->totalframes); 261 return AVERROR_INVALIDDATA; 262 } 263 if (ape->seektablelength / sizeof(*ape->seektable) < ape->totalframes) { 264 av_log(s, AV_LOG_ERROR, 265 "Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n", 266 ape->seektablelength / sizeof(*ape->seektable), ape->totalframes); 267 return AVERROR_INVALIDDATA; 268 } 269 ape->frames = av_malloc_array(ape->totalframes, sizeof(APEFrame)); 270 if(!ape->frames) 271 return AVERROR(ENOMEM); 272 ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength; 273 if (ape->fileversion < 3810) 274 ape->firstframe += ape->totalframes; 275 ape->currentframe = 0; 276 277 278 ape->totalsamples = ape->finalframeblocks; 279 if (ape->totalframes > 1) 280 ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1); 281 282 if (ape->seektablelength > 0) { 283 ape->seektable = av_mallocz(ape->seektablelength); 284 if (!ape->seektable) 285 return AVERROR(ENOMEM); 286 for (i = 0; i < ape->seektablelength / sizeof(uint32_t) && !pb->eof_reached; i++) 287 ape->seektable[i] = avio_rl32(pb); 288 if (ape->fileversion < 3810) { 289 ape->bittable = av_mallocz(ape->totalframes); 290 if (!ape->bittable) 291 return AVERROR(ENOMEM); 292 for (i = 0; i < ape->totalframes && !pb->eof_reached; i++) 293 ape->bittable[i] = avio_r8(pb); 294 } 295 if (pb->eof_reached) 296 av_log(s, AV_LOG_WARNING, "File truncated\n"); 297 } 298 299 ape->frames[0].pos = ape->firstframe; 300 ape->frames[0].nblocks = ape->blocksperframe; 301 ape->frames[0].skip = 0; 302 for (i = 1; i < ape->totalframes; i++) { 303 ape->frames[i].pos = ape->seektable[i] + ape->junklength; 304 ape->frames[i].nblocks = ape->blocksperframe; 305 ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos; 306 ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3; 307 } 308 ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks; 309 /* calculate final packet size from total file size, if available */ 310 file_size = avio_size(pb); 311 if (file_size > 0) { 312 final_size = file_size - ape->frames[ape->totalframes - 1].pos - 313 ape->wavtaillength; 314 final_size -= final_size & 3; 315 } 316 if (file_size <= 0 || final_size <= 0) 317 final_size = ape->finalframeblocks * 8; 318 ape->frames[ape->totalframes - 1].size = final_size; 319 320 for (i = 0; i < ape->totalframes; i++) { 321 if(ape->frames[i].skip){ 322 ape->frames[i].pos -= ape->frames[i].skip; 323 ape->frames[i].size += ape->frames[i].skip; 324 } 325 ape->frames[i].size = (ape->frames[i].size + 3) & ~3; 326 } 327 if (ape->fileversion < 3810) { 328 for (i = 0; i < ape->totalframes; i++) { 329 if (i < ape->totalframes - 1 && ape->bittable[i + 1]) 330 ape->frames[i].size += 4; 331 ape->frames[i].skip <<= 3; 332 ape->frames[i].skip += ape->bittable[i]; 333 } 334 } 335 336 ape_dumpinfo(s, ape); 337 338 av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n", 339 ape->fileversion / 1000, (ape->fileversion % 1000) / 10, 340 ape->compressiontype); 341 342 /* now we are ready: build format streams */ 343 st = avformat_new_stream(s, NULL); 344 if (!st) 345 return AVERROR(ENOMEM); 346 347 total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks; 348 349 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; 350 st->codecpar->codec_id = AV_CODEC_ID_APE; 351 st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' '); 352 st->codecpar->channels = ape->channels; 353 st->codecpar->sample_rate = ape->samplerate; 354 st->codecpar->bits_per_coded_sample = ape->bps; 355 356 st->nb_frames = ape->totalframes; 357 st->start_time = 0; 358 st->duration = total_blocks; 359 avpriv_set_pts_info(st, 64, 1, ape->samplerate); 360 361 if ((ret = ff_alloc_extradata(st->codecpar, APE_EXTRADATA_SIZE)) < 0) 362 return ret; 363 AV_WL16(st->codecpar->extradata + 0, ape->fileversion); 364 AV_WL16(st->codecpar->extradata + 2, ape->compressiontype); 365 AV_WL16(st->codecpar->extradata + 4, ape->formatflags); 366 367 pts = 0; 368 for (i = 0; i < ape->totalframes; i++) { 369 ape->frames[i].pts = pts; 370 av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME); 371 pts += ape->blocksperframe; 372 } 373 374 /* try to read APE tags */ 375 if (pb->seekable & AVIO_SEEKABLE_NORMAL) { 376 ff_ape_parse_tag(s); 377 avio_seek(pb, 0, SEEK_SET); 378 } 379 380 return 0; 381} 382 383static int ape_read_packet(AVFormatContext * s, AVPacket * pkt) 384{ 385 int ret; 386 int nblocks; 387 APEContext *ape = s->priv_data; 388 uint32_t extra_size = 8; 389 int64_t ret64; 390 391 if (avio_feof(s->pb)) 392 return AVERROR_EOF; 393 if (ape->currentframe >= ape->totalframes) 394 return AVERROR_EOF; 395 396 ret64 = avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET); 397 if (ret64 < 0) 398 return ret64; 399 400 /* Calculate how many blocks there are in this frame */ 401 if (ape->currentframe == (ape->totalframes - 1)) 402 nblocks = ape->finalframeblocks; 403 else 404 nblocks = ape->blocksperframe; 405 406 if (ape->frames[ape->currentframe].size <= 0 || 407 ape->frames[ape->currentframe].size > INT_MAX - extra_size) { 408 av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n", 409 ape->frames[ape->currentframe].size); 410 ape->currentframe++; 411 return AVERROR(EIO); 412 } 413 414 ret = av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size); 415 if (ret < 0) 416 return ret; 417 418 AV_WL32(pkt->data , nblocks); 419 AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip); 420 ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size); 421 if (ret < 0) { 422 return ret; 423 } 424 425 pkt->pts = ape->frames[ape->currentframe].pts; 426 pkt->stream_index = 0; 427 428 /* note: we need to modify the packet size here to handle the last 429 packet */ 430 pkt->size = ret + extra_size; 431 432 ape->currentframe++; 433 434 return 0; 435} 436 437static int ape_read_close(AVFormatContext * s) 438{ 439 APEContext *ape = s->priv_data; 440 441 av_freep(&ape->frames); 442 av_freep(&ape->seektable); 443 av_freep(&ape->bittable); 444 return 0; 445} 446 447static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) 448{ 449 AVStream *st = s->streams[stream_index]; 450 APEContext *ape = s->priv_data; 451 int index = av_index_search_timestamp(st, timestamp, flags); 452 int64_t ret; 453 454 if (index < 0) 455 return -1; 456 457 if ((ret = avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET)) < 0) 458 return ret; 459 ape->currentframe = index; 460 return 0; 461} 462 463AVInputFormat ff_ape_demuxer = { 464 .name = "ape", 465 .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"), 466 .priv_data_size = sizeof(APEContext), 467 .read_probe = ape_probe, 468 .read_header = ape_read_header, 469 .read_packet = ape_read_packet, 470 .read_close = ape_read_close, 471 .read_seek = ape_read_seek, 472 .extensions = "ape,apl,mac", 473};