root/contributed_modules/modules/extaudio/functions.inc.php

<?php

// The destinations this module provides
// returns a associative arrays with keys 'destination' and 'description'
function extaudio_destinations() {
    //static destinations
    $extens = array();
    $extens[] = array('destination' => 'app-extaudio,audioout,1', 'description' => 'Ext Audio Out');

    if (isset($extens))
        return $extens;
    else
        return null;

}

/*     Generates dialplan for "extaudio" components
    We call this with retrieve_conf
*/
function extaudio_get_config($engine) {

    global $ext;
    switch($engine) {
        case "asterisk":

// Volume settings

            $sql = "SELECT value FROM extaudio WHERE variable = 'lineoutvol'";
            $result = sql($sql,"getRow",DB_FETCHMODE_ASSOC);
            $lineoutvol = $result['value'];
            if (!isset($lineoutvol)) {
                            echo("Warning - No lineoutvol setting\n");
                            $lineoutvol = 50;
                            }
            $command = "amixer set Master " . $lineoutvol . "% unmute";
            exec($command,$output,$status);
            if ($status) {echo($output);}


            $sql = "SELECT value FROM extaudio WHERE variable = 'capturevol'";
            $result = sql($sql,"getRow",DB_FETCHMODE_ASSOC);
            $capturevol = $result['value'];
            if (!isset($capturevol)) {
                            echo("Warning - No capturevol setting\n");
                            $capturevol = 50;
                            }

            //capture volume seems to cause distortion above 25%
            $reducedcapturevol = $capturevol / 4;

            $command = "amixer set Capture " . $reducedcapturevol . "% unmute";
            exec($command,$output,$status);
            if ($status) {echo($output);}


            $sql = "SELECT value FROM extaudio WHERE variable = 'pagingvol'";
            $result = sql($sql,"getRow",DB_FETCHMODE_ASSOC);
            $pagingvol = $result['value'];
            if (!isset($pagingvol)) {
                            echo("Warning - No pagingvol setting\n");
                            $pagingvol = 100;
                            }
            $command = "amixer set PCM " . $pagingvol . "% unmute";
            exec($command,$output,$status);
            if ($status) {echo($output);}


            $sql = "SELECT value FROM extaudio WHERE variable = 'muzakvol'";
            $result = sql($sql,"getRow",DB_FETCHMODE_ASSOC);
            $muzakvol = $result['value'];
            if (!isset($muzakvol)) {
                            echo("Warning - No muzakvol setting\n");
                            $muzakvol = 100;
                            }
            $command = "amixer set Line " . $muzakvol . "% unmute cap";
            exec($command,$output,$status);
            if ($status) {echo($output);}

            $pagingmuzak = "/usr/bin/amixer set Line 0% unmute cap";
            $nopagingmuzak = "/usr/bin/amixer set Line " . $muzakvol . "% unmute cap";


// "extaudio" destinations
            $ext->add('app-extaudio', 'audioout', '', new ext_noop('External Audio Out'));
            $ext->add('app-extaudio', 'audioout', '', new ext_ringing());
            $ext->add('app-extaudio', 'audioout', '', new ext_wait(1));
            $ext->add('app-extaudio', 'audioout', '', new ext_playback(public_address_system));
            $ext->add('app-extaudio', 'audioout', '', new ext_playback(beep));
            $ext->add('app-extaudio', 'audioout', '', new ext_system($pagingmuzak));
            $ext->add('app-extaudio', 'audioout', '', new ext_dial("console/dsp,20,A(beep)"));
            $ext->add('app-extaudio', 'h', '', new ext_noop('Hungup so returning to normal extaudio settings'));
            $ext->add('app-extaudio', 'h', '', new ext_system($nopagingmuzak));
            $ext->add('app-extaudio', 'h', '', new ext_hangup());

    break;
    }
}



?>