AOutputDestinations(3X)

NAME

AOutputDestinations − get types of output destinations supported by the audio controller

SYNOPSIS

#include <Alib.h> AOutputDstMask
AOutputDestinations (

Audio ∗ audio );

DESCRIPTION

audio specifies the Audio structure associated with this connection.

RETURN VALUE

Upon successful completion, AOutputDestinations() returns a mask showing the output destinations that are supported by the audio controller: mono, left, or right headphone jacks, and mono, left, or right internal speakers. Each bit in the returned AOutputDstMask correponds to one type of output destination.

STRUCTURES

The following are defined in /opt/audio/include/Alib.h.

typedef long                    AOutputDstMask;
#define AMonoIntSpeakerMask     ( 1 << AODTMonoIntSpeaker )
#define AMonoJackMask           ( 1 << AODTMonoJack )
#define ALeftIntSpeakerMask     ( 1 << AODTLeftIntSpeaker )
#define ARightIntSpeakerMask    ( 1 << AODTRightIntSpeaker )
#define ALeftJackMask           ( 1 << AODTLeftJack )
#define ARightJackMask          ( 1 << AODTRightJack )
#define ADefaultOutputMask      ( 1 << AODTDefaultOutput )
#define AMonoLineOutMask        ( 1 << AODTMonoLineOut )
#define ALeftLineOutMask        ( 1 << AODTLeftLineOut )
#define ARightLineOutMask       ( 1 << AODTRightLineOut )
#define AMonoHeadphoneMask      ( 1 << AODTMonoHeadphone )
#define ALeftHeadphoneMask      ( 1 << AODTLeftHeadphone )
#define ARightHeadphoneMask     ( 1 << AODTRightHeadphone )

ERRORS

AOutputDestinations() does not return an error status. Note that the application program may crash if audio does not point to a valid Audio structure.

EXAMPLE

The following example gets the types of output destinations supported by the audio controller.

AOutputDstMask dests; /∗ output destination mask ∗/

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

/∗ get output destinations ∗/

dests = AOutputDestinations(audio);

NOTES

AOutputDestinations() is a convenience function that enables the client program to examine a component of the internal Audio structure that is created by AOpenAudio(). The contents of the structure should be treated as read-only.

In order to ensure that the compiler finds the Audio Library (libAlib.sl) and the Alib.h header file, you must add the following switches:

-L /opt/audio/lib
-I/opt/audio/include

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 Using the Audio Developer’s Kit or the online help for the Audio control panel. For information about the audio capabilities of a particular system use the online example audioinfo.c.

AUTHOR

AOutputDestinations() was developed by HP.

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