NAME

AGetChannelGain − get transaction channel gain

SYNOPSIS

#include <audio/Alib.h>

void AGetChannelGain (

Audio *audio,

ATransID xid,

AChType channel,

AGainDB *gain_return,

long *status_return

);

DESCRIPTION

AGetChannelGain() Returns the transaction gain value. 

audio the Audio structure associated with this connection. 

xid the transaction ID. 

channel the type of channel: ACTMono, ACTLeft, or ACTRight. 

gain_return receives the returned gain value. 

status_return receives the returned status of the operation, unless it is set to NULL. 

ERRORS

If status_return is not set to NULL, one of the following is returned in status_return.

0 AENoError

2 AEBadAudio

3 AEBadValue

EXAMPLES

The following example returns the transaction left channel gain value. 

Audio *audio;              /* audio connection */
AChType *chtype;           /* type of channel */
AGainDB chgain_ret;        /* transaction gain value*/
long status;               /* error status */
.
.
.
/* get xid left channel gain */
chtype = ACTLeft
AGetChannelGain(audio, xid, chtype, &chgain_ret, &status);

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

AGetChannelGain() was developed by HP. 

SEE ALSO

AGetGain(3X), AGetSystemChannelGain(3X), AGMGainRestricted(3X), AInputChannels(3X), AInputSources(3X), AMaxInputGain(3X), AMaxOutputGain(3X), AMinInputGain(3X), AMinOutputGain(3X), AOutputChannels(3X), AOutputDestinations(3X), ASetChannelGain(3X), ASetGain(3X), ASetSystemChannelGain(3X), ASimplePlayer(3X), ASimpleRecorder(3X). 

Using the Audio Application Program Interface.

Hewlett-Packard Company  —  HP-UX Release 9.03: April 1994