NAME

AGetGain − get play volume or record gain of specified transaction

SYNOPSIS

void
AGetGain (

Audio ∗ audio,

ATransID xid,

AGainDB ∗ gain_return

long ∗ status_return);

DESCRIPTION

AGetGain() returns the play volume or record gain of the transaction specified in xid. 

audio specifies the Audio structure associated with this connection. 

xid specifies the transaction ID. 

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

15 AEBadTransactionID

EXAMPLE

The following example gets the gain for the xid transaction and sets up status to receive an error status. 

Audio ∗ audio;  /∗ audio connection ∗/

TransID xid;  /∗ transaction ID ∗/

AGainDB gain_return;  /∗ gain return ∗/

long status;  /∗ error status ∗/
.
.
.

/∗ get gain for xid returned by prior call ∗/

AGetGain(audio, xid, &gain_return, &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

AGetGain() was developed by HP. 

SEE ALSO

AGMGainRestricted(3X), AInputChannels(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