NAME

AInputChannels − get list of A/D input channels on current hardware

SYNOPSIS

AInputChMask
AInputChannels (

Audio ∗ audio);

DESCRIPTION

AInputChannels() returns a mask showing the Analog/Digital input channels that exist on the current hardware.  Each bit in the returned AInputChMask correponds to one input channel. 

audio specifies the Audio structure associated with this connection. 

RETURN VALUE

Upon successful completion, AInputChannels() returns a mask showing the input channels that exist on the current hardware: mono, left, or right input. Each bit in the returned AInputChMask correponds to one type of input channel. 

ERRORS

AInputChannels() does not return an error status. 

EXAMPLE

The following example gets the types of input channels that exist on the current hardware. 

AInputChMask
in_channels;  /∗ mask showing existing input channels ∗/

Audio ∗ audio;  /∗ audio connection ∗/
.
.
.

/∗ get input channels ∗/

in_channels = AInputChannels(audio);

DEPENDENCIES

This function belongs to the Audio Library of functions that manage connections to an audio server.  The audio server must run on a system that has audio hardware. To find out whether or not your system has audio hardware, refer to the hardware manual that accompanies your system. 

AUTHOR

AInputChannels() was developed by HP. 

SEE ALSO

AGetGain(3X), AGMGainRestricted(3X), AInputSources(3X), AMaxInputGain(3X), AMaxOutputGain(3X), AMinInputGain(3X), AMinOutputGain(3X), AOutputChannels(3X), AOutputDestinations(3X), ASetGain(3X), ASetSysTemPlayGain(3X), ASetSystemRecordGain(3X), ASimplePlayer(3X), ASimpleRecorder(3X). 

Using the Audio Application Program Interface.

Hewlett-Packard Company  —  HP-UX Release 8.07: November 1991