Inside Macintosh: Sound Manager

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Defining a Sound Input Completion Routine

The completionRoutine field of the sound parameter block record contains the address of a completion routine that is executed when the recording terminates normally, either by reaching its prescribed time or size limits or by the application calling the SPBStopRecording function. A completion routine should have the following format:

The completion routine is passed the address of the sound input parameter block that was passed to the SPBRecord function. You can gain access to other data structures in your application by passing an address in the userLong field of the parameter block. After the completion routine executes, your application should check the error field of the sound input parameter block to see if an error code was returned.

Your sound input interrupt routine is always called at interrupt time, so it should not call routines that might allocate or move memory or assume that A5 is set up. For more information on sound input interrupt routines, see "Sound Input Interrupt Routines" .

Inside Macintosh: Sound Manager

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