bool WaveFileWriter::write(const QAudioBuffer &buffer)
{
if (buffer.format() != m_format)
return false; // buffer format has changed
qint64 written = file.write((const char *)buffer.constData(), buffer.byteCount());
m_dataLength += written;
return written == buffer.byteCount();
}
void AudioSource::processBufferDecoder()
{
QAudioBuffer buff = decoder->read();
qint64 val = this->pos();
this->seek(this->size());
this->write((const char*)buff.constData(),buff.byteCount());
this->seek(val);
}
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());
}