ANumDataFormats(3X)
NAME
ANumDataFormats − return number of data formats supported by audio controller
SYNOPSIS
#include <Alib.h> long
ANumDataFormats (
Audio ∗ audio );
DESCRIPTION
ANumDataFormats() returns the number of data formats supported by the audio controller associated with the connection specified by audio.
Use ADataFormats() to obtain a list of the data formats.
audio specifies the Audio structure associated with this connection.
RETURN VALUE
Upon successful completion, ANumDataFormats() returns the number of data formats supported by the audio controller associated with the connection specified by audio.
ERRORS
ANumDataFormats() 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 number of data formats supported by the audio controller associated with audio.
long dfnum; /∗ number of supported data formats ∗/
Audio ∗ audio; /∗ audio connection ∗/
.
.
.
/∗ get number of data formats supported by controller ∗/
dfnum = ANumDataFormats(audio);
NOTES
ANumDataFormats() 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
ANumDataFormats() was developed by HP.
SEE ALSO
Hewlett-Packard Company — Audio Library: February, 1995