Inside Macintosh: QuickTime Components /

Chapter 6 - Sequence Grabber Channel Components / Sequence Grabber Channel Components Reference

Functions

Configuration Functions for Sound Channel Components

Sound channel components provide a number of functions that allow sequence grabber components to configure the component's sound channel. This section describes these sound channel configuration functions. The sequence grabber component uses these functions only with sound channels.

The SGSetChannelVolume function allows the sequence grabber component to
control a channel's sound volume. The sequence grabber component uses the SGGetChannelVolume function to determine a channel's volume.

The SGSetSoundInputDriver specifies a channel's sound input device. The sequence grabber component can determine a channel's sound input device by calling the SGGetSoundInputDriver function. If an application changes any attributes of the sound input device, the sequence grabber component notifies your sound component by calling the SGSoundInputDriverChanged function.

The sequence grabber component can control the amount of sound data your channel works with at one time by calling the SGSetSoundRecordChunkSize function. The sequence grabber component can determine this value by calling the SGGetSoundRecordChunkSize function.

The sequence grabber component controls the rate at which your sound channel samples the input data by calling the SGSetSoundInputRate function. The sequence grabber component can determine the sample rate by calling the SGGetSoundInputRate function.

The sequence grabber can control other sound input parameters by using your SGSetSoundInputParameters and SGGetSoundInputParameters functions.

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Subtopics

SGSetChannelVolume

SGGetChannelVolume

SGSetSoundInputDriver

SGGetSoundInputDriver

SGSoundInputDriverChanged

SGSetSoundRecordChunkSize

SGGetSoundRecordChunkSize

SGSetSoundInputRate

SGGetSoundInputRate

SGSetSoundInputParameters

SGGetSoundInputParameters