Inside Macintosh: QuickTime Components /

Chapter 5 - Sequence Grabber Components / Sequence Grabber Components Reference

Sequence Grabber Component Functions / Working With Sound Channels

SGGetSoundInputDriver

The SGGetSoundInputDriver function allows you to determine the sound input device currently in use by a sound channel component.

pascal long SGGetSoundInputDriver (SGChannel c);

c

Specifies the reference that identifies the channel for this operation. You obtain this reference from the SGNewChannel function, described on page 5-29.

DESCRIPTION

The SGGetSoundInputDriver function returns a reference to the sound input device. If the sound channel is not using a sound input device, this returned value is set to nil.

You may want to gain access to the sound input device if you want to change the device's configuration.

SPECIAL CONSIDERATIONS

If you change any of the device's operating parameters, be sure to inform the sequence grabber component by calling the SGSoundInputDriverChanged function, which is described in the next section.

SEE ALSO

You can assign a sound input device to a sound channel by calling the SGSetSoundInputDriver function, described in the previous section.