CachingReader::CachingReader(const char* group,
ConfigObject<ConfigValue>* config)
: m_pConfig(config),
m_chunkReadRequestFIFO(1024),
m_readerStatusFIFO(1024),
m_readerStatus(INVALID),
m_mruChunk(NULL),
m_lruChunk(NULL),
m_pRawMemoryBuffer(NULL),
m_iTrackNumSamplesCallbackSafe(0) {
int rawMemoryBufferLength = CachingReaderWorker::kSamplesPerChunk * maximumChunksInMemory;
m_pRawMemoryBuffer = new CSAMPLE[rawMemoryBufferLength];
m_allocatedChunks.reserve(maximumChunksInMemory);
CSAMPLE* bufferStart = m_pRawMemoryBuffer;
// Divide up the allocated raw memory buffer into total_chunks
// chunks. Initialize each chunk to hold nothing and add it to the free
// list.
for (int i=0; i < maximumChunksInMemory; i++) {
Chunk* c = new Chunk;
c->chunk_number = -1;
c->length = 0;
c->data = bufferStart;
c->next_lru = NULL;
c->prev_lru = NULL;
m_chunks.push_back(c);
m_freeChunks.push_back(c);
bufferStart += CachingReaderWorker::kSamplesPerChunk;
}
m_pWorker = new CachingReaderWorker(group,
&m_chunkReadRequestFIFO,
&m_readerStatusFIFO);
// Forward signals from worker
connect(m_pWorker, SIGNAL(trackLoading()),
this, SIGNAL(trackLoading()),
Qt::DirectConnection);
connect(m_pWorker, SIGNAL(trackLoaded(TrackPointer, int, int)),
this, SIGNAL(trackLoaded(TrackPointer, int, int)),
Qt::DirectConnection);
connect(m_pWorker, SIGNAL(trackLoadFailed(TrackPointer, QString)),
this, SIGNAL(trackLoadFailed(TrackPointer, QString)),
Qt::DirectConnection);
m_pWorker->start(QThread::HighPriority);
}
void CachingReaderWorker::loadTrack(const TrackPointer& pTrack) {
//qDebug() << m_group << "CachingReaderWorker::loadTrack() lock acquired for load.";
// Emit that a new track is loading, stops the current track
emit(trackLoading());
ReaderStatusUpdate status;
status.status = TRACK_NOT_LOADED;
QString filename = pTrack->getLocation();
if (filename.isEmpty() || !pTrack->exists()) {
// Must unlock before emitting to avoid deadlock
qDebug() << m_group << "CachingReaderWorker::loadTrack() load failed for\""
<< filename << "\", unlocked reader lock";
m_pReaderStatusFIFO->writeBlocking(&status, 1);
emit(trackLoadFailed(
pTrack, QString("The file '%1' could not be found.").arg(filename)));
return;
}
Mixxx::AudioSourceConfig audioSrcCfg;
audioSrcCfg.setChannelCount(CachingReaderChunk::kChannels);
m_pAudioSource = openAudioSourceForReading(pTrack, audioSrcCfg);
if (m_pAudioSource.isNull()) {
m_maxReadableFrameIndex = Mixxx::AudioSource::getMinFrameIndex();
// Must unlock before emitting to avoid deadlock
qDebug() << m_group << "CachingReaderWorker::loadTrack() load failed for\""
<< filename << "\", file invalid, unlocked reader lock";
m_pReaderStatusFIFO->writeBlocking(&status, 1);
emit(trackLoadFailed(
pTrack, QString("The file '%1' could not be loaded.").arg(filename)));
return;
}
// Initially assume that the complete content offered by audio source
// is available for reading. Later if read errors occur this value will
// be decreased to avoid repeated reading of corrupt audio data.
m_maxReadableFrameIndex = m_pAudioSource->getMaxFrameIndex();
status.maxReadableFrameIndex = m_maxReadableFrameIndex;
status.status = TRACK_LOADED;
m_pReaderStatusFIFO->writeBlocking(&status, 1);
// Clear the chunks to read list.
CachingReaderChunkReadRequest request;
while (m_pChunkReadRequestFIFO->read(&request, 1) == 1) {
qDebug() << "Skipping read request for " << request.chunk->getIndex();
status.status = CHUNK_READ_INVALID;
status.chunk = request.chunk;
m_pReaderStatusFIFO->writeBlocking(&status, 1);
}
// Emit that the track is loaded.
const SINT sampleCount =
CachingReaderChunk::frames2samples(
m_pAudioSource->getFrameCount());
emit(trackLoaded(pTrack, m_pAudioSource->getSamplingRate(), sampleCount));
}
void CachingReaderWorker::loadTrack(const TrackPointer& pTrack) {
//qDebug() << m_group << "CachingReaderWorker::loadTrack() lock acquired for load.";
// Emit that a new track is loading, stops the current track
emit(trackLoading());
ReaderStatusUpdate status;
status.status = TRACK_NOT_LOADED;
status.chunk = NULL;
status.trackFrameCount = 0;
QString filename = pTrack->getLocation();
if (filename.isEmpty() || !pTrack->exists()) {
// Must unlock before emitting to avoid deadlock
qDebug() << m_group << "CachingReaderWorker::loadTrack() load failed for\""
<< filename << "\", unlocked reader lock";
m_pReaderStatusFIFO->writeBlocking(&status, 1);
emit(trackLoadFailed(
pTrack, QString("The file '%1' could not be found.").arg(filename)));
return;
}
Mixxx::AudioSourceConfig audioSrcCfg;
audioSrcCfg.channelCountHint = kChunkChannels;
m_pAudioSource = openAudioSourceForReading(pTrack, audioSrcCfg);
if (m_pAudioSource.isNull()) {
// Must unlock before emitting to avoid deadlock
qDebug() << m_group << "CachingReaderWorker::loadTrack() load failed for\""
<< filename << "\", file invalid, unlocked reader lock";
m_pReaderStatusFIFO->writeBlocking(&status, 1);
emit(trackLoadFailed(
pTrack, QString("The file '%1' could not be loaded.").arg(filename)));
return;
}
status.trackFrameCount = m_pAudioSource->getFrameCount();
status.status = TRACK_LOADED;
m_pReaderStatusFIFO->writeBlocking(&status, 1);
// Clear the chunks to read list.
ChunkReadRequest request;
while (m_pChunkReadRequestFIFO->read(&request, 1) == 1) {
qDebug() << "Skipping read request for " << request.chunk->chunk_number;
status.status = CHUNK_READ_INVALID;
status.chunk = request.chunk;
m_pReaderStatusFIFO->writeBlocking(&status, 1);
}
// Emit that the track is loaded.
const SINT sampleCount =
m_pAudioSource->getFrameCount() * kChunkChannels;
emit(trackLoaded(pTrack, m_pAudioSource->getFrameRate(), sampleCount));
}
CachingReader::CachingReader(QString group,
UserSettingsPointer config)
: m_pConfig(config),
m_chunkReadRequestFIFO(1024),
m_readerStatusFIFO(1024),
m_readerStatus(INVALID),
m_mruCachingReaderChunk(nullptr),
m_lruCachingReaderChunk(nullptr),
m_sampleBuffer(CachingReaderChunk::kSamples * maximumCachingReaderChunksInMemory),
m_maxReadableFrameIndex(Mixxx::AudioSource::getMinFrameIndex()),
m_worker(group, &m_chunkReadRequestFIFO, &m_readerStatusFIFO) {
m_allocatedCachingReaderChunks.reserve(m_sampleBuffer.size());
CSAMPLE* bufferStart = m_sampleBuffer.data();
// Divide up the allocated raw memory buffer into total_chunks
// chunks. Initialize each chunk to hold nothing and add it to the free
// list.
for (int i = 0; i < maximumCachingReaderChunksInMemory; ++i) {
CachingReaderChunkForOwner* c = new CachingReaderChunkForOwner(bufferStart);
m_chunks.push_back(c);
m_freeChunks.push_back(c);
bufferStart += CachingReaderChunk::kSamples;
}
// Forward signals from worker
connect(&m_worker, SIGNAL(trackLoading()),
this, SIGNAL(trackLoading()),
Qt::DirectConnection);
connect(&m_worker, SIGNAL(trackLoaded(TrackPointer, int, int)),
this, SIGNAL(trackLoaded(TrackPointer, int, int)),
Qt::DirectConnection);
connect(&m_worker, SIGNAL(trackLoadFailed(TrackPointer, QString)),
this, SIGNAL(trackLoadFailed(TrackPointer, QString)),
Qt::DirectConnection);
m_worker.start(QThread::HighPriority);
}
void CachingReaderWorker::loadTrack(TrackPointer pTrack) {
//qDebug() << m_pGroup << "CachingReaderWorker::loadTrack() lock acquired for load.";
// Emit that a new track is loading, stops the current track
emit(trackLoading());
ReaderStatusUpdate status;
status.status = TRACK_LOADED;
status.chunk = NULL;
status.trackNumSamples = 0;
if (m_pCurrentSoundSource != NULL) {
delete m_pCurrentSoundSource;
m_pCurrentSoundSource = NULL;
}
m_iTrackNumSamples = 0;
QString filename = pTrack->getLocation();
if (filename.isEmpty() || !pTrack->exists()) {
// Must unlock before emitting to avoid deadlock
qDebug() << m_pGroup << "CachingReaderWorker::loadTrack() load failed for\""
<< filename << "\", unlocked reader lock";
status.status = TRACK_NOT_LOADED;
m_pReaderStatusFIFO->writeBlocking(&status, 1);
emit(trackLoadFailed(
pTrack, QString("The file '%1' could not be found.").arg(filename)));
return;
}
m_pCurrentSoundSource = new SoundSourceProxy(pTrack);
bool openSucceeded = (m_pCurrentSoundSource->open() == OK); //Open the song for reading
unsigned int trackSampleRate = m_pCurrentSoundSource->getSampleRate();
m_iTrackNumSamples = status.trackNumSamples =
m_pCurrentSoundSource->length();
if (!openSucceeded || m_iTrackNumSamples == 0 || trackSampleRate == 0) {
// Must unlock before emitting to avoid deadlock
qDebug() << m_pGroup << "CachingReaderWorker::loadTrack() load failed for\""
<< filename << "\", file invalid, unlocked reader lock";
status.status = TRACK_NOT_LOADED;
m_pReaderStatusFIFO->writeBlocking(&status, 1);
emit(trackLoadFailed(
pTrack, QString("The file '%1' could not be loaded.").arg(filename)));
return;
}
m_pReaderStatusFIFO->writeBlocking(&status, 1);
// Clear the chunks to read list.
ChunkReadRequest request;
while (m_pChunkReadRequestFIFO->read(&request, 1) == 1) {
qDebug() << "Skipping read request for " << request.chunk->chunk_number;
status.status = CHUNK_READ_INVALID;
status.chunk = request.chunk;
m_pReaderStatusFIFO->writeBlocking(&status, 1);
}
// Emit that the track is loaded.
emit(trackLoaded(pTrack, trackSampleRate, m_iTrackNumSamples));
}
