C++ default constructor.

Destructor.

Returns the current balance setting.

From MDevSoundObserver::BufferToBeEmptied Handles CMMFDevSound object's data request event. Called when the buffer, aBuffer gets filled while recording or converting. The observer should notify CMMFDevSound object as quickly as possible after data in the buffer is processed by calling RecordData(), otherwise the implementation might callback method RecordError() on derived class object with error code KErrOverflow.

From MDevSoundObserver::BufferToBeFilled Handles CMMFDevSound object's data request event. CMMFDevSound object calls this method when and where it needs data for playing or converting. The observer should notify CMMFDevSound object as quickly as possible after the data is read into buffer, aBuffer by calling PlayData(), otherwise the implementation might callback method PlayError() on derived class object with error code KErrUnderflow.

Clears the audio device resources. Counter part of InitializeL.

Configures the audio device. Method is synchronous.

By default Symbian 2nd phase constructor is private.

From MDevSoundObserver::ConvertError Handles conversion completion or cancel event. Called when an attempt to convert data from source format to destination format has completed, successfully or otherwise.

From MDevSoundObserver::DeviceMessage Handles device event. Called when a message is received from the audio hardware device.

From MDevSoundObserver::InitializeComplete Handles initialization completion event from DevSound. Called InitializeL() function completes.

Initializes the audio device. Method is asynchronous. MDevTTSAudioObserver::InitializeComplete() called when initialization is ready.

Returns maximum volume.

Two-phased constructor.

Pauses the ongoing playback operation

Plays the filled buffer, Should be called when BufferToBeFilled callback has filled the requested buffer.

From MDevSoundObserver::PlayError Handles play completion or cancel event. Called when an attempt to play audio sample has completed, successfully or otherwise.

Initialises the audio playback process.

From MDevSoundObserver::RecordError Handles record completion or cancel event. Called when an attempt to record audio sample has completed, successfully or otherwise.

From MDevSoundObserver::SendEventToClient Handles policy request completion event. Called when an attempt to acquire sound device is rejected by audio policy server.

Sets the audio output routing

Sets the priority for audio playback.

Sets the playback balance.

Sets the playback volume. Range is from 0 (minumum) to MaxVolume(). Out of range values will be discarded.

Sets the volume ramp duration

Stops the ongoing playback operation.

From MDevSoundObserver::ToneFinished Handles tone play completion event. Called when an attempt to play tone has completed, successfully or otherwise.

Returns the current volume setting.