void tst_QAudioDecoderBackend::deviceTest()
{
QAudioDecoder d;
QAudioBuffer buffer;
quint64 duration = 0;
int sampleCount = 0;
QSignalSpy readySpy(&d, SIGNAL(bufferReady()));
QSignalSpy bufferChangedSpy(&d, SIGNAL(bufferAvailableChanged(bool)));
QSignalSpy errorSpy(&d, SIGNAL(error(QAudioDecoder::Error)));
QSignalSpy stateSpy(&d, SIGNAL(stateChanged(QAudioDecoder::State)));
QSignalSpy durationSpy(&d, SIGNAL(durationChanged(qint64)));
QSignalSpy finishedSpy(&d, SIGNAL(finished()));
QSignalSpy positionSpy(&d, SIGNAL(positionChanged(qint64)));
QVERIFY(d.state() == QAudioDecoder::StoppedState);
QVERIFY(d.bufferAvailable() == false);
QCOMPARE(d.sourceFilename(), QString(""));
QVERIFY(d.audioFormat() == QAudioFormat());
QFileInfo fileInfo(QFINDTESTDATA(TEST_FILE_NAME));
QFile file(fileInfo.absoluteFilePath());
QVERIFY(file.open(QIODevice::ReadOnly));
d.setSourceDevice(&file);
QVERIFY(d.sourceDevice() == &file);
QVERIFY(d.sourceFilename().isEmpty());
// We haven't set the format yet
QVERIFY(d.audioFormat() == QAudioFormat());
d.start();
QTRY_VERIFY(d.state() == QAudioDecoder::DecodingState);
QTRY_VERIFY(!stateSpy.isEmpty());
QTRY_VERIFY(!readySpy.isEmpty());
QTRY_VERIFY(!bufferChangedSpy.isEmpty());
QVERIFY(d.bufferAvailable());
QTRY_VERIFY(!durationSpy.isEmpty());
QVERIFY(qAbs(d.duration() - 1000) < 20);
buffer = d.read();
QVERIFY(buffer.isValid());
// Test file is 44.1K 16bit mono
QCOMPARE(buffer.format().channelCount(), 1);
QCOMPARE(buffer.format().sampleRate(), 44100);
QCOMPARE(buffer.format().sampleSize(), 16);
QCOMPARE(buffer.format().sampleType(), QAudioFormat::SignedInt);
QCOMPARE(buffer.format().codec(), QString("audio/pcm"));
QVERIFY(errorSpy.isEmpty());
duration += buffer.duration();
sampleCount += buffer.sampleCount();
// Now drain the decoder
if (sampleCount < 44094) {
QTRY_COMPARE(d.bufferAvailable(), true);
}
while (d.bufferAvailable()) {
buffer = d.read();
QVERIFY(buffer.isValid());
QTRY_VERIFY(!positionSpy.isEmpty());
QVERIFY(positionSpy.takeLast().at(0).toLongLong() == qint64(duration / 1000));
QVERIFY(d.position() - (duration / 1000) < 20);
duration += buffer.duration();
sampleCount += buffer.sampleCount();
if (sampleCount < 44094) {
QTRY_COMPARE(d.bufferAvailable(), true);
}
}
// Make sure the duration is roughly correct (+/- 20ms)
QCOMPARE(sampleCount, 44094);
QVERIFY(qAbs(qint64(duration) - 1000000) < 20000);
QVERIFY(qAbs((d.position() + (buffer.duration() / 1000)) - 1000) < 20);
QTRY_COMPARE(finishedSpy.count(), 1);
QVERIFY(!d.bufferAvailable());
QTRY_COMPARE(d.state(), QAudioDecoder::StoppedState);
d.stop();
QTRY_COMPARE(d.state(), QAudioDecoder::StoppedState);
QVERIFY(!d.bufferAvailable());
QTRY_COMPARE(durationSpy.count(), 2);
QCOMPARE(d.duration(), qint64(-1));
readySpy.clear();
bufferChangedSpy.clear();
stateSpy.clear();
durationSpy.clear();
finishedSpy.clear();
positionSpy.clear();
// Now try changing formats
QAudioFormat format;
format.setChannelCount(2);
format.setSampleSize(8);
format.setSampleRate(8000);
format.setCodec("audio/pcm");
format.setSampleType(QAudioFormat::SignedInt);
d.setAudioFormat(format);
// Make sure it stuck
QVERIFY(d.audioFormat() == format);
d.start();
QTRY_VERIFY(d.state() == QAudioDecoder::DecodingState);
QTRY_VERIFY(!stateSpy.isEmpty());
QTRY_VERIFY(!readySpy.isEmpty());
QTRY_VERIFY(!bufferChangedSpy.isEmpty());
QVERIFY(d.bufferAvailable());
QTRY_VERIFY(!durationSpy.isEmpty());
QVERIFY(qAbs(d.duration() - 1000) < 20);
buffer = d.read();
QVERIFY(buffer.isValid());
// See if we got the right format
QVERIFY(buffer.format() == format);
// The decoder should still have the same format
QVERIFY(d.audioFormat() == format);
QVERIFY(errorSpy.isEmpty());
d.stop();
QTRY_COMPARE(d.state(), QAudioDecoder::StoppedState);
QVERIFY(!d.bufferAvailable());
QTRY_COMPARE(durationSpy.count(), 2);
QCOMPARE(d.duration(), qint64(-1));
}
void tst_QAudioDecoderBackend::fileTest()
{
QAudioDecoder d;
QAudioBuffer buffer;
quint64 duration = 0;
int byteCount = 0;
int sampleCount = 0;
QVERIFY(d.state() == QAudioDecoder::StoppedState);
QVERIFY(d.bufferAvailable() == false);
QCOMPARE(d.sourceFilename(), QString(""));
QVERIFY(d.audioFormat() == QAudioFormat());
// Test local file
QFileInfo fileInfo(QFINDTESTDATA(TEST_FILE_NAME));
d.setSourceFilename(fileInfo.absoluteFilePath());
QVERIFY(d.state() == QAudioDecoder::StoppedState);
QVERIFY(!d.bufferAvailable());
QCOMPARE(d.sourceFilename(), fileInfo.absoluteFilePath());
QSignalSpy readySpy(&d, SIGNAL(bufferReady()));
QSignalSpy bufferChangedSpy(&d, SIGNAL(bufferAvailableChanged(bool)));
QSignalSpy errorSpy(&d, SIGNAL(error(QAudioDecoder::Error)));
QSignalSpy stateSpy(&d, SIGNAL(stateChanged(QAudioDecoder::State)));
QSignalSpy durationSpy(&d, SIGNAL(durationChanged(qint64)));
QSignalSpy finishedSpy(&d, SIGNAL(finished()));
QSignalSpy positionSpy(&d, SIGNAL(positionChanged(qint64)));
d.start();
QTRY_VERIFY(d.state() == QAudioDecoder::DecodingState);
QTRY_VERIFY(!stateSpy.isEmpty());
QTRY_VERIFY(!readySpy.isEmpty());
QTRY_VERIFY(!bufferChangedSpy.isEmpty());
QVERIFY(d.bufferAvailable());
QTRY_VERIFY(!durationSpy.isEmpty());
QVERIFY(qAbs(d.duration() - 1000) < 20);
buffer = d.read();
QVERIFY(buffer.isValid());
// Test file is 44.1K 16bit mono, 44094 samples
QCOMPARE(buffer.format().channelCount(), 1);
QCOMPARE(buffer.format().sampleRate(), 44100);
QCOMPARE(buffer.format().sampleSize(), 16);
QCOMPARE(buffer.format().sampleType(), QAudioFormat::SignedInt);
QCOMPARE(buffer.format().codec(), QString("audio/pcm"));
QCOMPARE(buffer.byteCount(), buffer.sampleCount() * 2); // 16bit mono
// The decoder should still have no format set
QVERIFY(d.audioFormat() == QAudioFormat());
QVERIFY(errorSpy.isEmpty());
duration += buffer.duration();
sampleCount += buffer.sampleCount();
byteCount += buffer.byteCount();
// Now drain the decoder
if (sampleCount < 44094) {
QTRY_COMPARE(d.bufferAvailable(), true);
}
while (d.bufferAvailable()) {
buffer = d.read();
QVERIFY(buffer.isValid());
QTRY_VERIFY(!positionSpy.isEmpty());
QVERIFY(positionSpy.takeLast().at(0).toLongLong() == qint64(duration / 1000));
duration += buffer.duration();
sampleCount += buffer.sampleCount();
byteCount += buffer.byteCount();
if (sampleCount < 44094) {
QTRY_COMPARE(d.bufferAvailable(), true);
}
}
// Make sure the duration is roughly correct (+/- 20ms)
QCOMPARE(sampleCount, 44094);
QCOMPARE(byteCount, 44094 * 2);
QVERIFY(qAbs(qint64(duration) - 1000000) < 20000);
QVERIFY(qAbs((d.position() + (buffer.duration() / 1000)) - 1000) < 20);
QTRY_COMPARE(finishedSpy.count(), 1);
QVERIFY(!d.bufferAvailable());
QTRY_COMPARE(d.state(), QAudioDecoder::StoppedState);
d.stop();
QTRY_COMPARE(d.state(), QAudioDecoder::StoppedState);
QTRY_COMPARE(durationSpy.count(), 2);
QCOMPARE(d.duration(), qint64(-1));
QVERIFY(!d.bufferAvailable());
readySpy.clear();
bufferChangedSpy.clear();
stateSpy.clear();
durationSpy.clear();
finishedSpy.clear();
positionSpy.clear();
// change output audio format
QAudioFormat format;
format.setChannelCount(2);
format.setSampleSize(8);
format.setSampleRate(11050);
format.setCodec("audio/pcm");
format.setSampleType(QAudioFormat::SignedInt);
d.setAudioFormat(format);
// We expect 1 second still, at 11050 * 2 samples == 22k samples.
// (at 1 byte/sample -> 22kb)
// Make sure it stuck
QVERIFY(d.audioFormat() == format);
duration = 0;
sampleCount = 0;
byteCount = 0;
d.start();
QTRY_VERIFY(d.state() == QAudioDecoder::DecodingState);
QTRY_VERIFY(!stateSpy.isEmpty());
QTRY_VERIFY(!readySpy.isEmpty());
QTRY_VERIFY(!bufferChangedSpy.isEmpty());
QVERIFY(d.bufferAvailable());
QTRY_VERIFY(!durationSpy.isEmpty());
QVERIFY(qAbs(d.duration() - 1000) < 20);
buffer = d.read();
QVERIFY(buffer.isValid());
// See if we got the right format
QVERIFY(buffer.format() == format);
// The decoder should still have the same format
QVERIFY(d.audioFormat() == format);
QVERIFY(errorSpy.isEmpty());
duration += buffer.duration();
sampleCount += buffer.sampleCount();
byteCount += buffer.byteCount();
// Now drain the decoder
if (duration < 998000) {
QTRY_COMPARE(d.bufferAvailable(), true);
}
while (d.bufferAvailable()) {
buffer = d.read();
QVERIFY(buffer.isValid());
QTRY_VERIFY(!positionSpy.isEmpty());
QVERIFY(positionSpy.takeLast().at(0).toLongLong() == qint64(duration / 1000));
QVERIFY(d.position() - (duration / 1000) < 20);
duration += buffer.duration();
sampleCount += buffer.sampleCount();
byteCount += buffer.byteCount();
if (duration < 998000) {
QTRY_COMPARE(d.bufferAvailable(), true);
}
}
// Resampling might end up with fewer or more samples
// so be a bit sloppy
QVERIFY(qAbs(sampleCount - 22047) < 100);
QVERIFY(qAbs(byteCount - 22047) < 100);
QVERIFY(qAbs(qint64(duration) - 1000000) < 20000);
QVERIFY(qAbs((d.position() + (buffer.duration() / 1000)) - 1000) < 20);
QTRY_COMPARE(finishedSpy.count(), 1);
QVERIFY(!d.bufferAvailable());
QTRY_COMPARE(d.state(), QAudioDecoder::StoppedState);
d.stop();
QTRY_COMPARE(d.state(), QAudioDecoder::StoppedState);
QTRY_COMPARE(durationSpy.count(), 2);
QCOMPARE(d.duration(), qint64(-1));
QVERIFY(!d.bufferAvailable());
}
void AudioBuffer::init(QAudioBuffer &qtbuffer){
qDebug() << "void AudioBuffer::init(...) called";
QAudioFormat audioFormat = qtbuffer.format();
this->hzFreq = audioFormat.sampleRate();
this->durationInMs = qtbuffer.duration()*1000;
QAudioFormat::SampleType sampleType
= audioFormat.sampleType();
int frameCount = qtbuffer.frameCount();
int nChannels = audioFormat.channelCount();
int bytesPerFrame = audioFormat.bytesPerFrame();
int bytesPerValue = bytesPerFrame/nChannels;
void *firstData = qtbuffer.data();
this->bufferSize = frameCount;
this->buffer = QSharedPointer<SharedBuffer>(
new SharedBuffer);
this->buffer->buffer = new int[this->bufferSize];
this->mean = 0;
const int tempReducFactor = 500;
qint64 meanOfSquare = 0;
for(int i=0; i<frameCount; i++){
int currentValue = 0;
for(int j=0; j<nChannels; j++){
int currentPos
= i*bytesPerFrame
+ j*bytesPerValue;
void *valPos = (void *)(((quint8 *)firstData) + currentPos);
if(sampleType == QAudioFormat::SignedInt){
if(bytesPerValue == 1){
quint8 val = *((quint8*)valPos);
currentValue += val;
}else if(bytesPerValue == 2){
quint16 val = *((quint16*)valPos);
currentValue += val;
}else if(bytesPerValue == 4){
quint32 val = *((quint32*)valPos);
currentValue += val;
}else if(bytesPerValue == 8){
quint64 val = *((quint64*)valPos);
currentValue += val;
}
}else if(sampleType == QAudioFormat::UnSignedInt){
if(bytesPerValue == 1){
qint8 val = *((qint8*)valPos);
currentValue += val;
}else if(bytesPerValue == 2){
qint16 val = *((qint16*)valPos);
currentValue += val;
}else if(bytesPerValue == 4){
qint32 val = *((qint32*)valPos);
currentValue += val;
}else if(bytesPerValue == 8){
qint64 val = *((qint64*)valPos);
currentValue += val;
}
}else if(sampleType == QAudioFormat::Float){
qreal val = *((qreal*)valPos);
currentValue += val;
}
}
currentValue /= nChannels;
currentValue /= tempReducFactor;
this->buffer->buffer[i] = currentValue;
this->mean += currentValue;
meanOfSquare += currentValue*currentValue;
if(meanOfSquare < 0){
Q_ASSERT(false);
}
}
this->mean /= frameCount;
meanOfSquare /= frameCount;
qint64 squaredMean =
this->mean
* this->mean;
this->var = meanOfSquare
- squaredMean;
this->var *= tempReducFactor * tempReducFactor;
this->mean *= tempReducFactor;
this->sd = qSqrt(this->var);
qDebug() << "void AudioBuffer::init(...) end";
}