About 

The player calls this function when the user requests information about the plug-in. 

Complete 

The player calls this function to notify that the current audio data stream is complete. 

Configure 

The player will call this function when the user wants to configure the plug-in. 

Drain 

This player calls this function to know when all the data passed to Write has been encoded. 

Initialize 

The player calls this function to initialize the plug-in. 

Open 

The player calls this function to prepare the plug-in encode audio data. 

ShutDown 

The player calls this function to shutdown the plug-in. 

TestFormat 

The player calls this function to test an audio format for support by the Encoder module. 

Write 

The player calls this function to pass audio data for encoding. 

Reserved 

Used internally or reserved for future expansion