MediaEjected 

This informs the player that removable media has ejected from the system. 

MediaInserted 

This informs the player that new removable media has been added into the system. 

OutputDrain 

The plug-in can call this function to know when all data written to OutputWrite has been rendered by the output plug-in. 

OutputDrainCancel 

The plug-in can call this function to cancel an OutputDrain request in progress. 

OutputFlush 

The plug-in can call this function to immediately clear all data written to the output plug-in. 

OutputGetCurrentPosition 

The plug-in can call this function to get the precise playback position of the output plug-in. 

OutputOpen 

The plug-in needs to call this function to prepare the output plug-in prior to receiving the audio data. 

OutputPause 

The plug-in can call this function to pause the output plug-in. 

OutputSetVolume 

The plug-in can call this to set the volume level of the output plug-in. 

OutputStop 

The plug-in can call this function to stop the output plug-in. 

OutputTestFormat 

The plug-in can call this function to test an audio format for support by the output plug-in. 

OutputWrite 

The plug-in needs to call this function to pass decoded audio to the output plug-ins for rendering. 

PlayDone 

The plug-in must call this function this when playback completes. 

PlayPaused 

The plug-in can call this function to indicate that playback has paused without being requested. 

PlayStarted 

The plug-in can call this function to initiate playback without being requested. 

PlayStopped 

The plug-in can call this function to stop playback without being requested. 

PlayTrackChanged 

The plug-in can call this function to update the currently playing track without being requested. 

PositionUpdate 

The plug-in can call this function to notify the player of playback progress. 

Reserved 

Used internally or reserved for future expansion