void OnEnable() // We subscribe to the player's stream in OnEnable, and unsubscribe in OnDisable
{
// audio thread stream access is protected behind an explicit implementation of IGATAudioThreadStreamOwner.GetAudioThreadStream()
// Handling of streams is delicate: the callback they provide is on the audio thread and needs special care.
// We first cast the default player to IGATAudioThreadStreamOwner in order to get access to audio stream getter methods.
IGATAudioThreadStreamOwner streamOwner = ( IGATAudioThreadStreamOwner )GATManager.DefaultPlayer;
_observedStream = streamOwner.GetAudioThreadStream(0);
// The point of this tutorial is to demonstrate stereo capture!
if (_observedStream.NbOfChannels != 2)
{
Debug.LogError("This tutorial only works with stereo ouptut!");
Destroy(this);
return;
}
_observedStream.AddAudioThreadStreamClient(this); //Subscribe to the stream: we will now receive the HandleAudioThreadStream callback.
}
/// <summary>
/// Call from derived classes to attempt to
/// get a valid stream from the streamComponent and
/// store it in _stream.
/// </summary>
protected void GetStream()
{
if (streamComponent == null)
{
streamComponent = gameObject.GetComponent(typeof(IGATAudioThreadStreamOwner));
}
if (streamIsTrack)
{
GATPlayer player = streamComponent as GATPlayer;
if (player == null)
{
throw new GATException("Cannot find GATPlayer to observe track stream. ");
}
if (streamIndex >= player.NbOfTracks)
{
throw new GATException("Track does not exist!");
}
GATTrack track = player.GetTrack(streamIndex);
_stream = track.GetAudioThreadStream(0);
}
else
{
IGATAudioThreadStreamOwner owner = streamComponent as IGATAudioThreadStreamOwner;
_stream = owner.GetAudioThreadStream(streamIndex);
if (owner == null)
{
throw new GATException("Component is not a stream!");
}
if (streamIndex >= owner.NbOfStreams)
{
throw new GATException("Requested stream index does not exist.");
}
}
}
