// This is called from the AnalyserQueue thread
bool AnalyserQueue::doAnalysis(TrackPointer tio, SoundSourceProxy* pSoundSource) {
int totalSamples = pSoundSource->length();
//qDebug() << tio->getFilename() << " has " << totalSamples << " samples.";
int processedSamples = 0;
QTime progressUpdateInhibitTimer;
progressUpdateInhibitTimer.start(); // Inhibit Updates for 60 milliseconds
int read = 0;
bool dieflag = false;
bool cancelled = false;
int progress; // progress in 0 ... 100
do {
ScopedTimer t("AnalyserQueue::doAnalysis block");
read = pSoundSource->read(kAnalysisBlockSize, m_pSamplesPCM);
// To compare apples to apples, let's only look at blocks that are the
// full block size.
if (read != kAnalysisBlockSize) {
t.cancel();
}
// Safety net in case something later barfs on 0 sample input
if (read == 0) {
t.cancel();
break;
}
// If we get more samples than length, ask the analysers to process
// up to the number we promised, then stop reading - AD
if (read + processedSamples > totalSamples) {
qDebug() << "While processing track of length " << totalSamples << " actually got "
<< read + processedSamples << " samples, truncating analysis at expected length";
read = totalSamples - processedSamples;
dieflag = true;
}
// Normalize the samples from [SHRT_MIN, SHRT_MAX] to [-1.0, 1.0].
// TODO(rryan): Change the SoundSource API to do this for us.
for (int i = 0; i < read; ++i) {
m_pSamples[i] = static_cast<CSAMPLE>(m_pSamplesPCM[i]) / SHRT_MAX;
}
QListIterator<Analyser*> it(m_aq);
while (it.hasNext()) {
Analyser* an = it.next();
//qDebug() << typeid(*an).name() << ".process()";
an->process(m_pSamples, read);
//qDebug() << "Done " << typeid(*an).name() << ".process()";
}
// emit progress updates
// During the doAnalysis function it goes only to 100% - FINALIZE_PERCENT
// because the finalise functions will take also some time
processedSamples += read;
//fp div here prevents insane signed overflow
progress = (int)(((float)processedSamples)/totalSamples *
(1000 - FINALIZE_PERCENT));
if (m_progressInfo.track_progress != progress) {
if (progressUpdateInhibitTimer.elapsed() > 60) {
// Inhibit Updates for 60 milliseconds
emitUpdateProgress(tio, progress);
progressUpdateInhibitTimer.start();
}
}
// Since this is a background analysis queue, we should co-operatively
// yield every now and then to try and reduce CPU contention. The
// analyser queue is CPU intensive so we want to get out of the way of
// the audio callback thread.
//QThread::yieldCurrentThread();
//QThread::usleep(10);
//has something new entered the queue?
if (load_atomic(m_aiCheckPriorities)) {
m_aiCheckPriorities = false;
if (isLoadedTrackWaiting(tio)) {
qDebug() << "Interrupting analysis to give preference to a loaded track.";
dieflag = true;
cancelled = true;
}
}
if (m_exit) {
dieflag = true;
cancelled = true;
}
// Ignore blocks in which we decided to bail for stats purposes.
if (dieflag || cancelled) {
t.cancel();
}
} while(read == kAnalysisBlockSize && !dieflag);
return !cancelled; //don't return !dieflag or we might reanalyze over and over
}
// This is called from the AnalyserQueue thread
bool AnalyserQueue::doAnalysis(TrackPointer tio, SoundSourceProxy* pSoundSource) {
// TonalAnalyser requires a block size of 65536. Using a different value
// breaks the tonal analyser. We need to use a smaller block size becuase on
// Linux, the AnalyserQueue can starve the CPU of its resources, resulting
// in xruns.. A block size of 8192 seems to do fine.
const int ANALYSISBLOCKSIZE = 8192;
int totalSamples = pSoundSource->length();
//qDebug() << tio->getFilename() << " has " << totalSamples << " samples.";
int processedSamples = 0;
SAMPLE* data16 = new SAMPLE[ANALYSISBLOCKSIZE];
CSAMPLE* samples = new CSAMPLE[ANALYSISBLOCKSIZE];
QTime progressUpdateInhibitTimer;
progressUpdateInhibitTimer.start(); // Inhibit Updates for 60 milliseconds
int read = 0;
bool dieflag = false;
bool cancelled = false;
int progress; // progress in 0 ... 100
do {
ScopedTimer t("AnalyserQueue::doAnalysis block");
read = pSoundSource->read(ANALYSISBLOCKSIZE, data16);
// To compare apples to apples, let's only look at blocks that are the
// full block size.
if (read != ANALYSISBLOCKSIZE) {
t.cancel();
}
// Safety net in case something later barfs on 0 sample input
if (read == 0) {
t.cancel();
break;
}
// If we get more samples than length, ask the analysers to process
// up to the number we promised, then stop reading - AD
if (read + processedSamples > totalSamples) {
qDebug() << "While processing track of length " << totalSamples << " actually got "
<< read + processedSamples << " samples, truncating analysis at expected length";
read = totalSamples - processedSamples;
dieflag = true;
}
for (int i = 0; i < read; ++i) {
samples[i] = ((float)data16[i])/32767.0f;
}
QListIterator<Analyser*> it(m_aq);
while (it.hasNext()) {
Analyser* an = it.next();
//qDebug() << typeid(*an).name() << ".process()";
an->process(samples, read);
//qDebug() << "Done " << typeid(*an).name() << ".process()";
}
// emit progress updates
// During the doAnalysis function it goes only to 100% - FINALIZE_PERCENT
// because the finalise functions will take also some time
processedSamples += read;
//fp div here prevents insane signed overflow
progress = (int)(((float)processedSamples)/totalSamples *
(1000 - FINALIZE_PERCENT));
if (m_progressInfo.track_progress != progress) {
if (progressUpdateInhibitTimer.elapsed() > 60) {
// Inhibit Updates for 60 milliseconds
emitUpdateProgress(tio, progress);
progressUpdateInhibitTimer.start();
}
}
// Since this is a background analysis queue, we should co-operatively
// yield every now and then to try and reduce CPU contention. The
// analyser queue is CPU intensive so we want to get out of the way of
// the audio callback thread.
//QThread::yieldCurrentThread();
//QThread::usleep(10);
//has something new entered the queue?
if (m_aiCheckPriorities) {
m_aiCheckPriorities = false;
if (isLoadedTrackWaiting(tio)) {
qDebug() << "Interrupting analysis to give preference to a loaded track.";
dieflag = true;
cancelled = true;
}
}
if (m_exit) {
dieflag = true;
cancelled = true;
}
// Ignore blocks in which we decided to bail for stats purposes.
if (dieflag || cancelled) {
t.cancel();
}
} while(read == ANALYSISBLOCKSIZE && !dieflag);
delete[] data16;
delete[] samples;
return !cancelled; //don't return !dieflag or we might reanalyze over and over
}
