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AFGETFRAMESIZE(3)					     AFGETFRAMESIZE(3)

NAME
       afGetFrameSize -	calculate the frame size in bytes for an 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.

       expand3to4 is a boolean-valued integer indicating whether frame size
       calculation will	treat 24-bit data as having a size of 3	bytes or 4
       bytes.

DESCRIPTION
       afGetFrameSize returns the number of bytes in a frame in	a given	audio
       track.

       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.

       A non-zero value	of expand3to4 should be	used when calculating the
       frame size for storage in memory	(since 24-bit audio data is presented
       in memory as a 4-byte sign-extended integer), while a value of zero
       should be used for calculating storage on disk where no padding is
       added. The parameter expand3to4 is ignored unless the specified audio
       track contains 24-bit audio data.

AUTHOR
       Michael Pruett <michael@68k.org>

Audio File Library 0.3.6	  03/06/2013		     AFGETFRAMESIZE(3)

NAME | SYNOPSIS | PARAMETERS | DESCRIPTION | AUTHOR

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