Inside Macintosh: Sound /

Chapter 1 - Introduction to Sound on the Macintosh / Sound Reference

Routines / Generating and Stopping Speech

SpeechBusy

You can use the SpeechBusy function to determine whether any channels of speech are currently synthesizing speech.

FUNCTION SpeechBusy: Integer;

DESCRIPTION

The SpeechBusy function returns the number of speech channels that are currently synthesizing speech in the application. This is useful when you want to ensure that an earlier speech request has been completed before having the system speak again. Note that paused speech channels are counted among those that are synthesizing speech.

The speech channel that the Speech Manager allocates internally in response to calls to the SpeakString function is counted in the number returned by SpeechBusy. Thus, if you use just SpeakString to initiate speech, SpeechBusy always returns 1 as long as speech is being produced. When SpeechBusy returns 0, all initiated speech has finished.

SPECIAL CONSIDERATIONS

You can call the SpeechBusy function at interrupt time.

ASSEMBLY-LANGUAGE INFORMATION

The trap macro and routine selector for the SpeechBusy function are

Trap macro	Selector
_SoundDispatch	$003C000C