Audio::Mad::Resample - Resampling routines for mad_fixed_t data
my $resample = new Audio::Mad::Resample (44100, 48000);
my ($left, $right) = $resample->resample($d_left, $d_right);
$resample->init(22050, 8000);
if ($resample->mode() == 2) { print "no resampling needed" }
This module provides a means of changing the sampling rate
of streams of mad_fixed_t data produced by the underlying
library.
The underlying module resamples the streams using a linear
resampling method, provided with the mad-0.14.2b
distribution. (Thanks, Rob)
- new ([oldrate, newrate])
Creates a new resampling object, and attempts to initialize it
to convert samples in oldrate to samples in newrate. You can
call the ->init method later to change the sampling ratios if
necessary.
- init([oldrate, newrate])
Reinitializes an Audio::Mad::Resample object to resample
at a different ratio. Returns undef on error, 1 if
resampling is necessary, and 2 if resampling won't be
necessary.
- resample(left, [right])
Returns a stream of mad_fixed_t samples after applying linear
resampling. Will return either one or two channels depending
on what was passed into it.
- mode
Returns either 1, for resampling necessary, or 2, for
no resampling necessary.
Mark McConnell <mischke@cpan.org>
