afGetFrameSize - calculate the frame size in bytes for an audio track
float afGetFrameSize (AFfilehandle file, int track, int expand3to4);
is a valid AFfilehandle.
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.
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.
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
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
is ignored unless the specified audio track contains 24-bit
Michael Pruett <email@example.com>