NAME

Audio::GSM - Perl extension for libgsm

SYNOPSIS

use Audio::GSM;
$gsm = new Audio::GSM;
$wav49 = $gsm->option(GSM_OPT_WAV49);
$gsm->option(GSM_OPT_WAV49, $wav49);
$gsmData = $gsm->encode($pcmData);
$pcmData = $gsm->decode($gsmData);

DESCRIPTION

Audio::GSM is an OO wrapper for libgsm.

Methods

$gsm->option(OPTION, [EXPR])

Sets the OPTION and returns its previous value if EXPR is present, returns its current value otherwise. See gsm_option(3).

$gsm->encode(PCMDATA)

Encodes raw PCM data and returns GSM frame. PCMDATA is 320 bytes length portion of 16-bit mono PCM data.

Return value is 32 or 33 bytes length GSM frame. Short (32 bytes) frames are null-padded. See gsm(3).

$gsm->decode(GSMDATA)

Decodes GSM frame and returns PCM data. GSMDATA is 33 bytes length GSM frame.

Return value is 320 bytes length portion of 16-bit mono PCM data.

Exported constants

GSM_MAGIC
GSM_MAJOR
GSM_MINOR
GSM_OPT_FAST
GSM_OPT_FRAME_CHAIN
GSM_OPT_FRAME_INDEX
GSM_OPT_LTP_CUT
GSM_OPT_VERBOSE
GSM_OPT_WAV49
GSM_PATCHLEVEL

SEE ALSO

gsm(3), gsm_option(3)

AUTHOR

Alexander Frolov, <froller@froller.net>