ASamplingRates(3X)
NAME
ASamplingRates − return array of sampling rates supported by audio controller
SYNOPSIS
#include <Alib.h> unsigned long ∗
ASamplingRates (
Audio ∗ audio );
DESCRIPTION
audio specifies the Audio structure associated with this connection.
RETURN VALUE
Upon successful completion, ASamplingRates() returns a pointer to an array of sampling rates supported by the audio controller associated with the connection specified by audio.
The number of sampling rates in the array is obtained using the function ANumSamplingRates().
ERRORS
ASamplingRates() 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 returns an array containing the sampling rates supported by the audio controller associated with audio.
unsigned long ∗ s_rates, first_rate; /∗ supported sampling rates ∗/
Audio ∗ audio; /∗ audio connection ∗/
.
.
.
/∗ get ptr to array of sampling rates ∗/
s_rates = ASamplingRates(audio);
/∗ get first sampling rate ∗/
first_rate = s_rates[0];
NOTES
ASamplingRates() 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
ASamplingRates() was developed by HP.
SEE ALSO
Hewlett-Packard Company — Audio Library: February, 1995