annotate data/fileio/MP3FileReader.cpp @ 1349:330bcc92507d 3.0-integration

Take a different approach to using libsndfile -- the _fd function doesn't work for me in this build, so use the wchar api
author Chris Cannam
date Fri, 06 Jan 2017 20:51:47 +0000
parents b3cb0edc25cd
children 97deefd38060
rev   line source
Chris@148 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@148 2
Chris@148 3 /*
Chris@148 4 Sonic Visualiser
Chris@148 5 An audio file viewer and annotation editor.
Chris@148 6 Centre for Digital Music, Queen Mary, University of London.
Chris@148 7 This file copyright 2006 Chris Cannam.
Chris@148 8
Chris@148 9 This program is free software; you can redistribute it and/or
Chris@148 10 modify it under the terms of the GNU General Public License as
Chris@148 11 published by the Free Software Foundation; either version 2 of the
Chris@148 12 License, or (at your option) any later version. See the file
Chris@148 13 COPYING included with this distribution for more information.
Chris@148 14 */
Chris@148 15
Chris@148 16 #ifdef HAVE_MAD
Chris@148 17
Chris@148 18 #include "MP3FileReader.h"
Chris@392 19 #include "base/ProgressReporter.h"
Chris@357 20
Chris@150 21 #include "system/System.h"
Chris@148 22
Chris@148 23 #include <sys/types.h>
Chris@148 24 #include <sys/stat.h>
Chris@148 25 #include <fcntl.h>
Chris@148 26
Chris@148 27 #include <iostream>
Chris@148 28
Chris@405 29 #include <cstdlib>
Chris@405 30
Chris@271 31 #ifdef HAVE_ID3TAG
Chris@271 32 #include <id3tag.h>
Chris@271 33 #endif
Chris@1168 34
Chris@186 35 #include <QFileInfo>
Chris@148 36
Chris@1346 37 #include <QTextCodec>
Chris@1346 38
Chris@1305 39 using std::string;
Chris@1305 40
Chris@1305 41 static sv_frame_t DEFAULT_DECODER_DELAY = 529;
Chris@1305 42
Chris@317 43 MP3FileReader::MP3FileReader(FileSource source, DecodeMode decodeMode,
Chris@1305 44 CacheMode mode, GaplessMode gaplessMode,
Chris@1305 45 sv_samplerate_t targetRate,
Chris@920 46 bool normalised,
Chris@392 47 ProgressReporter *reporter) :
Chris@920 48 CodedAudioFileReader(mode, targetRate, normalised),
Chris@316 49 m_source(source),
Chris@316 50 m_path(source.getLocalFilename()),
Chris@1305 51 m_gaplessMode(gaplessMode),
Chris@1284 52 m_decodeErrorShown(false),
Chris@264 53 m_decodeThread(0)
Chris@148 54 {
Chris@1279 55 SVDEBUG << "MP3FileReader: local path: \"" << m_path
Chris@1279 56 << "\", decode mode: " << decodeMode << " ("
Chris@1279 57 << (decodeMode == DecodeAtOnce ? "DecodeAtOnce" : "DecodeThreaded")
Chris@1279 58 << ")" << endl;
Chris@1279 59
Chris@148 60 m_channelCount = 0;
Chris@297 61 m_fileRate = 0;
Chris@148 62 m_fileSize = 0;
Chris@148 63 m_bitrateNum = 0;
Chris@148 64 m_bitrateDenom = 0;
Chris@148 65 m_cancelled = false;
Chris@1288 66 m_mp3FrameCount = 0;
Chris@265 67 m_completion = 0;
Chris@263 68 m_done = false;
Chris@392 69 m_reporter = reporter;
Chris@148 70
Chris@1313 71 if (m_gaplessMode == GaplessMode::Gapless) {
Chris@1307 72 CodedAudioFileReader::setFramesToTrim(DEFAULT_DECODER_DELAY, 0);
Chris@1305 73 }
Chris@1305 74
Chris@1348 75 m_fileSize = 0;
Chris@148 76
Chris@1290 77 m_fileBuffer = 0;
Chris@1290 78 m_fileBufferSize = 0;
Chris@1290 79
Chris@1290 80 m_sampleBuffer = 0;
Chris@1290 81 m_sampleBufferSize = 0;
Chris@977 82
Chris@1348 83 QFile qfile(m_path);
Chris@1348 84 if (!qfile.open(QIODevice::ReadOnly)) {
Chris@1342 85 m_error = QString("Failed to open file %1 for reading.").arg(m_path);
Chris@1342 86 SVDEBUG << "MP3FileReader: " << m_error << endl;
Chris@1342 87 return;
Chris@1343 88 }
Chris@148 89
Chris@1348 90 m_fileSize = qfile.size();
Chris@1348 91
Chris@148 92 try {
Chris@1290 93 // We need a mysterious MAD_BUFFER_GUARD (== 8) zero bytes at
Chris@1290 94 // end of input, to ensure libmad decodes the last frame
Chris@1290 95 // correctly. Otherwise the decoded audio is truncated.
Chris@1290 96 m_fileBufferSize = m_fileSize + MAD_BUFFER_GUARD;
Chris@1290 97 m_fileBuffer = new unsigned char[m_fileBufferSize];
Chris@1290 98 memset(m_fileBuffer + m_fileSize, 0, MAD_BUFFER_GUARD);
Chris@148 99 } catch (...) {
Chris@290 100 m_error = QString("Out of memory");
Chris@1342 101 SVDEBUG << "MP3FileReader: " << m_error << endl;
Chris@1342 102 return;
Chris@148 103 }
Chris@1348 104
Chris@1348 105 auto amountRead = qfile.read(reinterpret_cast<char *>(m_fileBuffer),
Chris@1348 106 m_fileSize);
Chris@1348 107
Chris@1348 108 if (amountRead < m_fileSize) {
Chris@1348 109 SVCERR << QString("MP3FileReader::MP3FileReader: Warning: reached EOF after only %1 of %2 bytes")
Chris@1348 110 .arg(amountRead).arg(m_fileSize) << endl;
Chris@1348 111 memset(m_fileBuffer + amountRead, 0, m_fileSize - amountRead);
Chris@1348 112 m_fileSize = amountRead;
Chris@148 113 }
Chris@1348 114
Chris@1348 115 loadTags(qfile.handle());
Chris@148 116
Chris@1348 117 qfile.close();
Chris@271 118
Chris@263 119 if (decodeMode == DecodeAtOnce) {
Chris@263 120
Chris@392 121 if (m_reporter) {
Chris@392 122 connect(m_reporter, SIGNAL(cancelled()), this, SLOT(cancelled()));
Chris@392 123 m_reporter->setMessage
Chris@392 124 (tr("Decoding %1...").arg(QFileInfo(m_path).fileName()));
Chris@327 125 }
Chris@148 126
Chris@1290 127 if (!decode(m_fileBuffer, m_fileBufferSize)) {
Chris@316 128 m_error = QString("Failed to decode file %1.").arg(m_path);
Chris@263 129 }
Chris@263 130
Chris@1290 131 delete[] m_fileBuffer;
Chris@1290 132 m_fileBuffer = 0;
Chris@148 133
Chris@263 134 if (isDecodeCacheInitialised()) finishDecodeCache();
Chris@398 135 endSerialised();
Chris@263 136
Chris@392 137 } else {
Chris@263 138
Chris@392 139 if (m_reporter) m_reporter->setProgress(100);
Chris@263 140
Chris@263 141 m_decodeThread = new DecodeThread(this);
Chris@263 142 m_decodeThread->start();
Chris@263 143
Chris@386 144 while ((m_channelCount == 0 || m_fileRate == 0 || m_sampleRate == 0)
Chris@386 145 && !m_done) {
Chris@263 146 usleep(10);
Chris@263 147 }
Chris@386 148
Chris@1288 149 SVDEBUG << "MP3FileReader: decoding startup complete, file rate = " << m_fileRate << endl;
Chris@148 150 }
Chris@499 151
Chris@499 152 if (m_error != "") {
Chris@1279 153 SVDEBUG << "MP3FileReader::MP3FileReader(\"" << m_path << "\"): ERROR: " << m_error << endl;
Chris@499 154 }
Chris@148 155 }
Chris@148 156
Chris@148 157 MP3FileReader::~MP3FileReader()
Chris@148 158 {
Chris@263 159 if (m_decodeThread) {
Chris@265 160 m_cancelled = true;
Chris@263 161 m_decodeThread->wait();
Chris@263 162 delete m_decodeThread;
Chris@263 163 }
Chris@148 164 }
Chris@148 165
Chris@263 166 void
Chris@392 167 MP3FileReader::cancelled()
Chris@392 168 {
Chris@392 169 m_cancelled = true;
Chris@392 170 }
Chris@392 171
Chris@392 172 void
Chris@1348 173 MP3FileReader::loadTags(int fd)
Chris@271 174 {
Chris@271 175 m_title = "";
Chris@271 176
Chris@271 177 #ifdef HAVE_ID3TAG
Chris@271 178
Chris@1348 179 id3_file *file = id3_file_fdopen(fd, ID3_FILE_MODE_READONLY);
Chris@271 180 if (!file) return;
Chris@271 181
Chris@273 182 // We can do this a lot more elegantly, but we'll leave that for
Chris@273 183 // when we implement support for more than just the one tag!
Chris@273 184
Chris@271 185 id3_tag *tag = id3_file_tag(file);
Chris@273 186 if (!tag) {
Chris@1279 187 SVDEBUG << "MP3FileReader::loadTags: No ID3 tag found" << endl;
Chris@273 188 id3_file_close(file);
Chris@273 189 return;
Chris@271 190 }
Chris@271 191
Chris@333 192 m_title = loadTag(tag, "TIT2"); // work title
Chris@333 193 if (m_title == "") m_title = loadTag(tag, "TIT1");
Chris@1287 194 if (m_title == "") SVDEBUG << "MP3FileReader::loadTags: No title found" << endl;
Chris@273 195
Chris@333 196 m_maker = loadTag(tag, "TPE1"); // "lead artist"
Chris@333 197 if (m_maker == "") m_maker = loadTag(tag, "TPE2");
Chris@1287 198 if (m_maker == "") SVDEBUG << "MP3FileReader::loadTags: No artist/maker found" << endl;
Chris@273 199
Chris@632 200 for (unsigned int i = 0; i < tag->nframes; ++i) {
Chris@632 201 if (tag->frames[i]) {
Chris@632 202 QString value = loadTag(tag, tag->frames[i]->id);
Chris@1287 203 if (value != "") {
Chris@1287 204 m_tags[tag->frames[i]->id] = value;
Chris@1287 205 }
Chris@632 206 }
Chris@632 207 }
Chris@632 208
Chris@1348 209 // We don't id3_file_close(file) because that closes the fd, which
Chris@1348 210 // was only lent to us
Chris@273 211
Chris@273 212 #else
Chris@1287 213 SVDEBUG << "MP3FileReader::loadTags: ID3 tag support not compiled in" << endl;
Chris@273 214 #endif
Chris@333 215 }
Chris@273 216
Chris@333 217 QString
Chris@333 218 MP3FileReader::loadTag(void *vtag, const char *name)
Chris@333 219 {
Chris@333 220 #ifdef HAVE_ID3TAG
Chris@333 221 id3_tag *tag = (id3_tag *)vtag;
Chris@333 222
Chris@333 223 id3_frame *frame = id3_tag_findframe(tag, name, 0);
Chris@333 224 if (!frame) {
Chris@1287 225 SVDEBUG << "MP3FileReader::loadTag: No \"" << name << "\" frame found in ID3 tag" << endl;
Chris@333 226 return "";
Chris@333 227 }
Chris@333 228
Chris@333 229 if (frame->nfields < 2) {
Chris@1287 230 cerr << "MP3FileReader::loadTag: WARNING: Not enough fields (" << frame->nfields << ") for \"" << name << "\" in ID3 tag" << endl;
Chris@333 231 return "";
Chris@333 232 }
Chris@333 233
Chris@333 234 unsigned int nstrings = id3_field_getnstrings(&frame->fields[1]);
Chris@333 235 if (nstrings == 0) {
Chris@1287 236 SVDEBUG << "MP3FileReader::loadTag: No strings for \"" << name << "\" in ID3 tag" << endl;
Chris@333 237 return "";
Chris@333 238 }
Chris@333 239
Chris@333 240 id3_ucs4_t const *ustr = id3_field_getstrings(&frame->fields[1], 0);
Chris@333 241 if (!ustr) {
Chris@1287 242 SVDEBUG << "MP3FileReader::loadTag: Invalid or absent data for \"" << name << "\" in ID3 tag" << endl;
Chris@333 243 return "";
Chris@333 244 }
Chris@333 245
Chris@333 246 id3_utf8_t *u8str = id3_ucs4_utf8duplicate(ustr);
Chris@333 247 if (!u8str) {
Chris@1287 248 SVDEBUG << "MP3FileReader::loadTag: ERROR: Internal error: Failed to convert UCS4 to UTF8 in ID3 tag" << endl;
Chris@333 249 return "";
Chris@333 250 }
Chris@333 251
Chris@333 252 QString rv = QString::fromUtf8((const char *)u8str);
Chris@333 253 free(u8str);
Chris@334 254
Chris@1287 255 SVDEBUG << "MP3FileReader::loadTag: Tag \"" << name << "\" -> \""
Chris@1287 256 << rv << "\"" << endl;
Chris@334 257
Chris@333 258 return rv;
Chris@333 259
Chris@333 260 #else
Chris@333 261 return "";
Chris@333 262 #endif
Chris@271 263 }
Chris@271 264
Chris@271 265 void
Chris@263 266 MP3FileReader::DecodeThread::run()
Chris@263 267 {
Chris@1290 268 if (!m_reader->decode(m_reader->m_fileBuffer, m_reader->m_fileBufferSize)) {
Chris@290 269 m_reader->m_error = QString("Failed to decode file %1.").arg(m_reader->m_path);
Chris@263 270 }
Chris@263 271
Chris@1290 272 delete[] m_reader->m_fileBuffer;
Chris@1290 273 m_reader->m_fileBuffer = 0;
Chris@297 274
Chris@1290 275 if (m_reader->m_sampleBuffer) {
Chris@929 276 for (int c = 0; c < m_reader->m_channelCount; ++c) {
Chris@1290 277 delete[] m_reader->m_sampleBuffer[c];
Chris@297 278 }
Chris@1290 279 delete[] m_reader->m_sampleBuffer;
Chris@1290 280 m_reader->m_sampleBuffer = 0;
Chris@297 281 }
Chris@297 282
Chris@263 283 if (m_reader->isDecodeCacheInitialised()) m_reader->finishDecodeCache();
Chris@263 284
Chris@263 285 m_reader->m_done = true;
Chris@265 286 m_reader->m_completion = 100;
Chris@297 287
Chris@297 288 m_reader->endSerialised();
Chris@263 289 }
Chris@263 290
Chris@148 291 bool
Chris@1038 292 MP3FileReader::decode(void *mm, sv_frame_t sz)
Chris@148 293 {
Chris@148 294 DecoderData data;
Chris@148 295 struct mad_decoder decoder;
Chris@148 296
Chris@148 297 data.start = (unsigned char const *)mm;
Chris@1288 298 data.length = sz;
Chris@1310 299 data.finished = false;
Chris@148 300 data.reader = this;
Chris@148 301
Chris@1288 302 mad_decoder_init(&decoder, // decoder to initialise
Chris@1288 303 &data, // our own data block for callbacks
Chris@1288 304 input_callback, // provides (entire) input to mad
Chris@1288 305 0, // checks header
Chris@1288 306 filter_callback, // filters frame before decoding
Chris@1288 307 output_callback, // receives decoded output
Chris@1288 308 error_callback, // handles decode errors
Chris@1288 309 0); // "message_func"
Chris@1288 310
Chris@148 311 mad_decoder_run(&decoder, MAD_DECODER_MODE_SYNC);
Chris@148 312 mad_decoder_finish(&decoder);
Chris@148 313
Chris@1288 314 SVDEBUG << "MP3FileReader: Decoding complete, decoded " << m_mp3FrameCount
Chris@1288 315 << " mp3 frames" << endl;
Chris@1288 316
Chris@263 317 m_done = true;
Chris@148 318 return true;
Chris@148 319 }
Chris@148 320
Chris@148 321 enum mad_flow
Chris@1288 322 MP3FileReader::input_callback(void *dp, struct mad_stream *stream)
Chris@148 323 {
Chris@148 324 DecoderData *data = (DecoderData *)dp;
Chris@148 325
Chris@1310 326 if (!data->length) {
Chris@1310 327 data->finished = true;
Chris@1310 328 return MAD_FLOW_STOP;
Chris@1310 329 }
Chris@348 330
Chris@348 331 unsigned char const *start = data->start;
Chris@1288 332 sv_frame_t length = data->length;
Chris@348 333
Chris@348 334 #ifdef HAVE_ID3TAG
Chris@1288 335 while (length > ID3_TAG_QUERYSIZE) {
Chris@1038 336 ssize_t taglen = id3_tag_query(start, ID3_TAG_QUERYSIZE);
Chris@1288 337 if (taglen <= 0) {
Chris@1288 338 break;
Chris@348 339 }
Chris@1288 340 SVDEBUG << "MP3FileReader: ID3 tag length to skip: " << taglen << endl;
Chris@1288 341 start += taglen;
Chris@1288 342 length -= taglen;
Chris@348 343 }
Chris@348 344 #endif
Chris@348 345
Chris@348 346 mad_stream_buffer(stream, start, length);
Chris@148 347 data->length = 0;
Chris@148 348
Chris@148 349 return MAD_FLOW_CONTINUE;
Chris@148 350 }
Chris@148 351
Chris@148 352 enum mad_flow
Chris@1288 353 MP3FileReader::filter_callback(void *dp,
Chris@1288 354 struct mad_stream const *stream,
Chris@1288 355 struct mad_frame *frame)
Chris@1288 356 {
Chris@1288 357 DecoderData *data = (DecoderData *)dp;
Chris@1288 358 return data->reader->filter(stream, frame);
Chris@1288 359 }
Chris@1288 360
Chris@1307 361 static string toMagic(unsigned long fourcc)
Chris@1305 362 {
Chris@1305 363 string magic("....");
Chris@1305 364 for (int i = 0; i < 4; ++i) {
Chris@1305 365 magic[3-i] = char((fourcc >> (8*i)) & 0xff);
Chris@1305 366 }
Chris@1305 367 return magic;
Chris@1305 368 }
Chris@1305 369
Chris@1288 370 enum mad_flow
Chris@1288 371 MP3FileReader::filter(struct mad_stream const *stream,
Chris@1288 372 struct mad_frame *)
Chris@1288 373 {
Chris@1289 374 if (m_mp3FrameCount > 0) {
Chris@1305 375 // only handle info frame if it appears as first mp3 frame
Chris@1289 376 return MAD_FLOW_CONTINUE;
Chris@1305 377 }
Chris@1305 378
Chris@1313 379 if (m_gaplessMode == GaplessMode::Gappy) {
Chris@1305 380 // Our non-gapless mode does not even filter out the Xing/LAME
Chris@1305 381 // frame. That's because the main reason non-gapless mode
Chris@1305 382 // exists is for backward compatibility with MP3FileReader
Chris@1305 383 // behaviour before the gapless support was added, so we even
Chris@1305 384 // need to keep the spurious 1152 samples resulting from
Chris@1305 385 // feeding Xing/LAME frame to the decoder as otherwise we'd
Chris@1305 386 // have different output from before.
Chris@1305 387 SVDEBUG << "MP3FileReader: Not gapless mode, not checking Xing/LAME frame"
Chris@1305 388 << endl;
Chris@1305 389 return MAD_FLOW_CONTINUE;
Chris@1305 390 }
Chris@1305 391
Chris@1305 392 struct mad_bitptr ptr = stream->anc_ptr;
Chris@1305 393 string magic = toMagic(mad_bit_read(&ptr, 32));
Chris@1305 394
Chris@1305 395 if (magic == "Xing" || magic == "Info") {
Chris@1305 396
Chris@1305 397 SVDEBUG << "MP3FileReader: Found Xing/LAME metadata frame (magic = \""
Chris@1305 398 << magic << "\")" << endl;
Chris@1305 399
Chris@1305 400 // All we want at this point is the LAME encoder delay and
Chris@1305 401 // padding values. We expect to see the Xing/Info magic (which
Chris@1305 402 // we've already read), then 116 bytes of Xing data, then LAME
Chris@1305 403 // magic, 5 byte version string, 12 bytes of LAME data that we
Chris@1305 404 // aren't currently interested in, then the delays encoded as
Chris@1305 405 // two 12-bit numbers into three bytes.
Chris@1305 406 //
Chris@1305 407 // (See gabriel.mp3-tech.org/mp3infotag.html)
Chris@1305 408
Chris@1305 409 for (int skip = 0; skip < 116; ++skip) {
Chris@1305 410 (void)mad_bit_read(&ptr, 8);
Chris@1305 411 }
Chris@1305 412
Chris@1305 413 magic = toMagic(mad_bit_read(&ptr, 32));
Chris@1305 414
Chris@1305 415 if (magic == "LAME") {
Chris@1305 416
Chris@1305 417 SVDEBUG << "MP3FileReader: Found LAME-specific metadata" << endl;
Chris@1305 418
Chris@1305 419 for (int skip = 0; skip < 5 + 12; ++skip) {
Chris@1305 420 (void)mad_bit_read(&ptr, 8);
Chris@1305 421 }
Chris@1305 422
Chris@1307 423 auto delay = mad_bit_read(&ptr, 12);
Chris@1307 424 auto padding = mad_bit_read(&ptr, 12);
Chris@1305 425
Chris@1305 426 sv_frame_t delayToDrop = DEFAULT_DECODER_DELAY + delay;
Chris@1305 427 sv_frame_t paddingToDrop = padding - DEFAULT_DECODER_DELAY;
Chris@1305 428 if (paddingToDrop < 0) paddingToDrop = 0;
Chris@1305 429
Chris@1305 430 SVDEBUG << "MP3FileReader: LAME encoder delay = " << delay
Chris@1305 431 << ", padding = " << padding << endl;
Chris@1305 432
Chris@1305 433 SVDEBUG << "MP3FileReader: Will be trimming " << delayToDrop
Chris@1306 434 << " samples from start and " << paddingToDrop
Chris@1306 435 << " from end" << endl;
Chris@1305 436
Chris@1307 437 CodedAudioFileReader::setFramesToTrim(delayToDrop, paddingToDrop);
Chris@1305 438
Chris@1305 439 } else {
Chris@1305 440 SVDEBUG << "MP3FileReader: Xing frame has no LAME metadata" << endl;
Chris@1305 441 }
Chris@1305 442
Chris@1305 443 return MAD_FLOW_IGNORE;
Chris@1305 444
Chris@1288 445 } else {
Chris@1305 446 return MAD_FLOW_CONTINUE;
Chris@1288 447 }
Chris@1288 448 }
Chris@1288 449
Chris@1288 450 enum mad_flow
Chris@1288 451 MP3FileReader::output_callback(void *dp,
Chris@1288 452 struct mad_header const *header,
Chris@1288 453 struct mad_pcm *pcm)
Chris@148 454 {
Chris@148 455 DecoderData *data = (DecoderData *)dp;
Chris@148 456 return data->reader->accept(header, pcm);
Chris@148 457 }
Chris@148 458
Chris@148 459 enum mad_flow
Chris@148 460 MP3FileReader::accept(struct mad_header const *header,
Chris@1343 461 struct mad_pcm *pcm)
Chris@148 462 {
Chris@148 463 int channels = pcm->channels;
Chris@148 464 int frames = pcm->length;
Chris@1288 465
Chris@148 466 if (header) {
Chris@1038 467 m_bitrateNum = m_bitrateNum + double(header->bitrate);
Chris@148 468 m_bitrateDenom ++;
Chris@148 469 }
Chris@148 470
Chris@148 471 if (frames < 1) return MAD_FLOW_CONTINUE;
Chris@148 472
Chris@148 473 if (m_channelCount == 0) {
Chris@297 474
Chris@297 475 m_fileRate = pcm->samplerate;
Chris@148 476 m_channelCount = channels;
Chris@297 477
Chris@297 478 initialiseDecodeCache();
Chris@297 479
Chris@297 480 if (m_cacheMode == CacheInTemporaryFile) {
Chris@690 481 // SVDEBUG << "MP3FileReader::accept: channel count " << m_channelCount << ", file rate " << m_fileRate << ", about to start serialised section" << endl;
Chris@297 482 startSerialised("MP3FileReader::Decode");
Chris@297 483 }
Chris@148 484 }
Chris@148 485
Chris@148 486 if (m_bitrateDenom > 0) {
Chris@148 487 double bitrate = m_bitrateNum / m_bitrateDenom;
Chris@148 488 double duration = double(m_fileSize * 8) / bitrate;
Chris@148 489 double elapsed = double(m_frameCount) / m_sampleRate;
Chris@375 490 double percent = 100;
Chris@375 491 if (duration > 0.0) percent = ((elapsed * 100.0) / duration);
Chris@357 492 int p = int(percent);
Chris@357 493 if (p < 1) p = 1;
Chris@357 494 if (p > 99) p = 99;
Chris@392 495 if (m_completion != p && m_reporter) {
Chris@357 496 m_completion = p;
Chris@392 497 m_reporter->setProgress(m_completion);
Chris@148 498 }
Chris@148 499 }
Chris@148 500
Chris@1290 501 if (m_cancelled) {
Chris@1290 502 SVDEBUG << "MP3FileReader: Decoding cancelled" << endl;
Chris@1290 503 return MAD_FLOW_STOP;
Chris@1290 504 }
Chris@148 505
Chris@148 506 if (!isDecodeCacheInitialised()) {
Chris@148 507 initialiseDecodeCache();
Chris@148 508 }
Chris@148 509
Chris@1290 510 if (m_sampleBufferSize < size_t(frames)) {
Chris@1290 511 if (!m_sampleBuffer) {
Chris@1290 512 m_sampleBuffer = new float *[channels];
Chris@297 513 for (int c = 0; c < channels; ++c) {
Chris@1290 514 m_sampleBuffer[c] = 0;
Chris@297 515 }
Chris@297 516 }
Chris@297 517 for (int c = 0; c < channels; ++c) {
Chris@1290 518 delete[] m_sampleBuffer[c];
Chris@1290 519 m_sampleBuffer[c] = new float[frames];
Chris@297 520 }
Chris@1290 521 m_sampleBufferSize = frames;
Chris@297 522 }
Chris@148 523
Chris@297 524 int activeChannels = int(sizeof(pcm->samples) / sizeof(pcm->samples[0]));
Chris@297 525
Chris@297 526 for (int ch = 0; ch < channels; ++ch) {
Chris@297 527
Chris@297 528 for (int i = 0; i < frames; ++i) {
Chris@297 529
Chris@1343 530 mad_fixed_t sample = 0;
Chris@1343 531 if (ch < activeChannels) {
Chris@1343 532 sample = pcm->samples[ch][i];
Chris@1343 533 }
Chris@1343 534 float fsample = float(sample) / float(MAD_F_ONE);
Chris@297 535
Chris@1290 536 m_sampleBuffer[ch][i] = fsample;
Chris@1343 537 }
Chris@148 538 }
Chris@148 539
Chris@1290 540 addSamplesToDecodeCache(m_sampleBuffer, frames);
Chris@148 541
Chris@1288 542 ++m_mp3FrameCount;
Chris@1288 543
Chris@148 544 return MAD_FLOW_CONTINUE;
Chris@148 545 }
Chris@148 546
Chris@148 547 enum mad_flow
Chris@1288 548 MP3FileReader::error_callback(void *dp,
Chris@1288 549 struct mad_stream *stream,
Chris@1288 550 struct mad_frame *)
Chris@148 551 {
Chris@1284 552 DecoderData *data = (DecoderData *)dp;
Chris@1290 553
Chris@1312 554 sv_frame_t ix = stream->this_frame - data->start;
Chris@1312 555
Chris@1290 556 if (stream->error == MAD_ERROR_LOSTSYNC &&
Chris@1312 557 (data->finished || ix >= data->length)) {
Chris@1310 558 // We are at end of file, losing sync is expected behaviour,
Chris@1310 559 // don't report it
Chris@1290 560 return MAD_FLOW_CONTINUE;
Chris@1290 561 }
Chris@1290 562
Chris@1284 563 if (!data->reader->m_decodeErrorShown) {
Chris@1284 564 char buffer[256];
Chris@1284 565 snprintf(buffer, 255,
cannam@1334 566 "MP3 decoding error 0x%04x (%s) at byte offset %lld",
Chris@1335 567 stream->error, mad_stream_errorstr(stream), (long long int)ix);
Chris@1284 568 SVCERR << "Warning: in file \"" << data->reader->m_path << "\": "
Chris@1284 569 << buffer << " (continuing; will not report any further decode errors for this file)" << endl;
Chris@1284 570 data->reader->m_decodeErrorShown = true;
Chris@1279 571 }
Chris@148 572
Chris@148 573 return MAD_FLOW_CONTINUE;
Chris@148 574 }
Chris@148 575
Chris@157 576 void
Chris@290 577 MP3FileReader::getSupportedExtensions(std::set<QString> &extensions)
Chris@157 578 {
Chris@157 579 extensions.insert("mp3");
Chris@157 580 }
Chris@157 581
Chris@316 582 bool
Chris@316 583 MP3FileReader::supportsExtension(QString extension)
Chris@316 584 {
Chris@316 585 std::set<QString> extensions;
Chris@316 586 getSupportedExtensions(extensions);
Chris@316 587 return (extensions.find(extension.toLower()) != extensions.end());
Chris@316 588 }
Chris@316 589
Chris@316 590 bool
Chris@316 591 MP3FileReader::supportsContentType(QString type)
Chris@316 592 {
Chris@316 593 return (type == "audio/mpeg");
Chris@316 594 }
Chris@316 595
Chris@316 596 bool
Chris@317 597 MP3FileReader::supports(FileSource &source)
Chris@316 598 {
Chris@316 599 return (supportsExtension(source.getExtension()) ||
Chris@316 600 supportsContentType(source.getContentType()));
Chris@316 601 }
Chris@316 602
Chris@316 603
Chris@148 604 #endif