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Changes to GStreamer backend for audio decoder.

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Removed WaitingState.
New signals: finished(), positionChanged(), durationChanged().
New methods: position(), duration().
A parameter removed from read() method.
Unit tests updated.

Change-Id: Ie9d8a2804285c5542e592cce69963adbdf6ebfb8
Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
This commit is contained in:
Lev Zelenskiy
2012-02-24 12:50:32 +10:00
committed by Qt by Nokia
parent 0b8c6115cd
commit b56d3e70df
7 changed files with 270 additions and 70 deletions
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55
tests/auto/unit/qmultimedia_common/mockaudiodecodercontrol.h
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@@ -51,6 +51,8 @@
#include <QTimer>
#include <QIODevice>
#define MOCK_DECODER_MAX_BUFFERS 10
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
@@ -66,6 +68,7 @@ public:
: QAudioDecoderControl(parent)
, mState(QAudioDecoder::StoppedState)
, mDevice(0)
, mPosition(-1)
, mSerial(0)
{
mFormat.setChannels(1);
@@ -126,6 +129,7 @@ public:
if (!mSource.isEmpty()) {
mState = QAudioDecoder::DecodingState;
emit stateChanged(mState);
emit durationChanged(duration());
QTimer::singleShot(50, this, SLOT(pretendDecode()));
} else {
@@ -139,28 +143,33 @@ public:
if (mState != QAudioDecoder::StoppedState) {
mState = QAudioDecoder::StoppedState;
mSerial = 0;
mPosition = 0;
mBuffers.clear();
emit stateChanged(mState);
emit bufferAvailableChanged(false);
}
}
QAudioBuffer read(bool *ok)
QAudioBuffer read()
{
QAudioBuffer a;
if (mBuffers.length() > 0) {
if (ok)
*ok = true;
QAudioBuffer a = mBuffers.takeFirst();
if (mBuffers.length() == 0)
a = mBuffers.takeFirst();
mPosition = a.startTime() / 1000;
emit positionChanged(mPosition);
if (mBuffers.isEmpty())
emit bufferAvailableChanged(false);
QTimer::singleShot(50, this, SLOT(pretendDecode()));
return a;
} else {
// Can't do anything here :(
if (ok)
*ok = false;
return QAudioBuffer();
if (mBuffers.isEmpty() && mSerial >= MOCK_DECODER_MAX_BUFFERS) {
mState = QAudioDecoder::StoppedState;
emit finished();
emit stateChanged(mState);
} else
QTimer::singleShot(50, this, SLOT(pretendDecode()));
}
return a;
}
bool bufferAvailable() const
@@ -168,22 +177,33 @@ public:
return mBuffers.length() > 0;
}
qint64 position() const
{
return mPosition;
}
qint64 duration() const
{
return (sizeof(mSerial) * MOCK_DECODER_MAX_BUFFERS * qint64(1000)) / (mFormat.sampleRate() * mFormat.channels());
}
private slots:
void pretendDecode()
{
// Check if we've reached end of stream
if (mSerial >= MOCK_DECODER_MAX_BUFFERS)
return;
// We just keep the length of mBuffers to 3 or less.
if (mBuffers.length() < 3) {
QByteArray b(sizeof(mSerial), 0);
memcpy(b.data(), &mSerial, sizeof(mSerial));
qint64 position = (sizeof(mSerial) * mSerial * qint64(1000000)) / (mFormat.sampleRate() * mFormat.channels());
mSerial++;
mBuffers.push_back(QAudioBuffer(b, mFormat));
mBuffers.push_back(QAudioBuffer(b, mFormat, position));
emit bufferReady();
if (mBuffers.count() == 1)
emit bufferAvailableChanged(true);
} else {
// Can't do anything here, wait for a read to restart the timer
mState = QAudioDecoder::WaitingState;
emit stateChanged(mState);
}
}
@@ -192,6 +212,7 @@ public:
QString mSource;
QIODevice *mDevice;
QAudioFormat mFormat;
qint64 mPosition;
int mSerial;
QList<QAudioBuffer> mBuffers;