--- a/src/multimedia/audio/qaudiooutput.cpp Tue Jan 26 12:42:25 2010 +0200
+++ b/src/multimedia/audio/qaudiooutput.cpp Tue Feb 02 00:43:10 2010 +0200
@@ -73,7 +73,11 @@
simple as:
\code
- QFile inputFile;
+ QFile inputFile; // class member.
+ QAudioOutput* audio; // class member.
+ \endcode
+
+ \code
inputFile.setFileName("/tmp/test.raw");
inputFile.open(QIODevice::ReadOnly);
@@ -86,7 +90,13 @@
format.setByteOrder(QAudioFormat::LittleEndian);
format.setSampleType(QAudioFormat::UnSignedInt);
- QAudioOutput *audio = new QAudioOutput(format, this);
+ QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());
+ if (!info.isFormatSupported(format)) {
+ qWarning()<<"raw audio format not supported by backend, cannot play audio.";
+ return;
+ }
+
+ audio = new QAudioOutput(format, this);
connect(audio,SIGNAL(stateChanged(QAudio::State)),SLOT(finishedPlaying(QAudio::State)));
audio->start(inputFile);
@@ -104,6 +114,7 @@
if(state == QAudio::IdleState) {
audio->stop();
inputFile.close();
+ delete audio;
}
}
\endcode
@@ -125,12 +136,12 @@
not emitted. A typical use-case would be to update a
\l{QSlider}{slider} that allows seeking in the stream.
If you want the time since playback started regardless of which
- states the audio output has been in, clock() is the function for you.
+ states the audio output has been in, elapsedUSecs() is the function for you.
If an error occurs, you can fetch the \l{QAudio::Error}{error
type} with the error() function. Please see the QAudio::Error enum
for a description of the possible errors that are reported. When
- an error is encountered, the state changes to QAudio::StopState.
+ an error is encountered, the state changes to QAudio::StoppedState.
You can check for errors by connecting to the stateChanged()
signal:
@@ -188,36 +199,42 @@
/*!
Uses the \a device as the QIODevice to transfer data.
- If \a device is null then the class creates an internal QIODevice.
- Returns a pointer to the QIODevice being used to handle the data
- transfer. This QIODevice can be used to write() audio data
- directly.
Passing a QIODevice allows the data to be transfered without any extra code.
All that is required is to open the QIODevice.
\sa QIODevice
*/
-QIODevice* QAudioOutput::start(QIODevice* device)
+void QAudioOutput::start(QIODevice* device)
{
/*
- PULL MODE (valid QIODevice)
- -If currently not StopState, stop.
+ -If currently not StoppedState, stop.
-If previous start was push mode, delete internal QIODevice.
-open audio output.
- -If ok, NoError and ActiveState, else OpenError and StopState
+ -If ok, NoError and ActiveState, else OpenError and StoppedState
-emit stateChanged()
- -return device
+ */
+ d->start(device);
+}
+
+/*!
+ Returns a pointer to the QIODevice being used to handle the data
+ transfer. This QIODevice can be used to write() audio data directly.
- PUSH MODE (device = 0)
- -If currently not StopState, stop.
+ \sa QIODevice
+*/
+
+QIODevice* QAudioOutput::start()
+{
+ /*
+ -If currently not StoppedState, stop.
-If no internal QIODevice, create one.
-open audio output.
- -If ok, NoError and IdleState, else OpenError and StopState
+ -If ok, NoError and IdleState, else OpenError and StoppedState
-emit stateChanged()
-return internal QIODevice
*/
- return d->start(device);
+ return d->start(0);
}
/*!
@@ -227,8 +244,8 @@
void QAudioOutput::stop()
{
/*
- -If StopState, return
- -set to StopState
+ -If StoppedState, return
+ -set to StoppedState
-detach from audio device
-emit stateChanged()
*/
@@ -257,7 +274,7 @@
/*
-If not ActiveState|IdleState, return
-stop processing audio, saving all buffered audio data
- -set NoError and SuspendState
+ -set NoError and SuspendedState
-emit stateChanged()
*/
d->suspend();
@@ -270,7 +287,7 @@
void QAudioOutput::resume()
{
/*
- -If SuspendState, return
+ -If SuspendedState, return
-resume audio
-(PULL MODE): set ActiveState, NoError
-(PUSH MODE): set IdleState, NoError
@@ -358,9 +375,9 @@
was called in microseconds.
*/
-qint64 QAudioOutput::totalTime() const
+qint64 QAudioOutput::processedUSecs() const
{
- return d->totalTime();
+ return d->processedUSecs();
}
/*!
@@ -368,9 +385,9 @@
Suspend states.
*/
-qint64 QAudioOutput::clock() const
+qint64 QAudioOutput::elapsedUSecs() const
{
- return d->clock();
+ return d->elapsedUSecs();
}
/*!