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afGetFrameSize returns the frame size in bytes for a specified audio
track.
SYNOPSIS
#include <audiofile.h>
float afGetFrameSize (AFfilehandle file, int track, int expand3to4);
PARAMETERS
file is a valid AFfilehandle.
track is an integer which refers to a specific audio track in the
file. At present no supported audio file format allows for more than
one audio track within a file, so track should always be
AF_DEFAULT_TRACK.
If expand3to4 is a non-zero value, then 3-byte frames will be treated
as taking up 4 bytes in memory. This is useful for calculating how
much memory will be needed to store audio data suitable for playback
since 24-bit audio data is typically aligned on 32-bit boundaries. (At
least that's how it's done on SGI systems; I know of no other computer
system that has support for 24-bit audio.)
DESCRIPTION
afGetFrameSize returns the number of bytes in a frame in the given
track of the specified file.
A sample frame consists of one or more samples. For a monaural track,
a sample frame will always contain one sample. For a stereophonic
track, a sample frame will always contain two samples, one for the left
channel and one for the right channel.
The parameter expand3to4 is ignored unless the specified audio track
contains 24-bit sampled audio data.
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