///
/// A helper for the STOP state that destroys our esound stream
///
void _ShutDownEstream()
{
Trace.WriteLine( "[_ShutDownEstream]", "MP3" );
if (null != _estream)
{
_estream.FreeWriteBuffer();
_estream.Close();
_estream = null;
}
}
internal EsdStream CreateStream(int id, string name, EsdFunc func)
{
EsdStream stream = new EsdStream(this);
stream.id = id;
stream.name = name;
stream.func = func;
return stream;
}
///
/// A helper for the PLAY_FILE_REQUEST state change that creates
/// our esound stream object, and sets an appropriate buffer size
///
bool _StartUpEstream()
{
Trace.WriteLine( "[_StartUpEstream]", "MP3" );
///
/// \todo Should get the sample rate from the mp3
/// file's header info instead of fixing it at
/// 44100. <:
///
/// \todo Exceptions won't propagate back to the
/// parent thread. How do we indicate esd errors?
///
// Retry opening the audio device several times.
for (int tries = 0; tries < 30; tries++)
{
try
{
if (null == _estream)
{
_estream = _esd.PlayStream( "Generic",
EsdChannels.Stereo,
44100,
EsdBits.Sixteen );
}
else
{
// esound already running, free the existing
// write buffer
_estream.FreeWriteBuffer();
}
// esd#'s buffer must be as large or larger than
// our buffer, or...boom!
_estream.AllocWriteBuffer( (int)_bufferSize );
return true; // success, break out of retry loop.
}
catch (Exception e)
{
Trace.WriteLine( e.ToString(), "MP3" );
}
Thread.Sleep( 1000 ); // Audio dev in use?
}
// If we got here, gave up trying to open the audio device.
return false;
}