source: main/trunk/model-sites-dev/multimodal-mdl/collect/js-dsp-my-ipod/script/hybrid-audio-player.js@ 28433

Element.prototype.getElementWidth = function() {
    if (typeof this.clip !== "undefined") {
    return this.clip.width;
    } else {
    if (this.style.pixelWidth) {
        return this.style.pixelWidth;
    } else {
        return this.offsetWidth;
    }
    }
};

Element.prototype.getElementHeight = function() {
    if (typeof this.clip !== "undefined") {
    return this.clip.height;
    } else {
    if (this.style.pixelHeight) {
        return this.style.pixelHeight;
    } else {
        return this.offsetHeight;
    }
    }
};


function isDefined(v) {
    return typeof v !== "undefined";
}

/* // ***** */
/* Move above in to more general header file */


// Useful shorthands
var SVG_NS ="http://www.w3.org/2000/svg";
var XLINK_NS = "http://www.w3.org/1999/xlink";


var hasStructuredAudio  = false;
var hasChromaSelfSimMap = false;

var allData      = null;
var yScaleSimImg = null;
var caAlgorithm  = null;
var duration     = null;


// ******
// * Frequency Player/Plotter part of Hybrid Player
// ******

function freqPlayerAudioPlay(event)
{
    console.info("Audio play pressed");

    if (audioMode == "stopped") {
    // Nolonger used (Firefox fails to fire this event on a fresh 'play' once an existing play has finished)

    // take a fresh snapshot of the transform mode selected in the web page

    //var transformMode = $('input:radio[name=visualization]:checked').val();
    //chromaTransform.setTransformMode(transformMode);

    }
    audioMode = "playing";
}

function freqPlayerAudioPause()
{
    console.info("Audio pause pressed");
    audioMode = "paused";

    // if stoping dualPlay
    leftSong.pause();
    rightSong.pause();
    baseSong.volume = 1.0;

}

function freqPlayerAudioEnded()
{
    console.info("Audio play/playlist ended");
    console.log("reset freq plot called");

    audioMode = "stopped";
    needsRefresh = true;

    frequencyPlotter.reset();

}

// ******
// * Meandre (server-side) workflow part of Hybrid Player
// ******
//
// Started when 'play' is pressed

// (workflows now in their own folder '$httpCollection/script/meandre-workflow/*.js)
// the global variable 'meandreWorkflows' stores which flows are available





// ******
// * Structured Audio (CAA) part of Hybrid Player
// ******

function caaInit() 
{
    // duration information is now available
    var audio = document.getElementById('rta-audio-element');
    duration = audio.duration;
    
    if (!isDefined(allData)) {
    // degenerate case
    
    var ground_truth = []; // empty ground truth
    
    var numSegs = 4;
    var gap = duration/numSegs;
    
    var label = [ "a", "b" ];
    var val   = [ 0, 1];
    
    var equal_spacing = [];
    for (var i=0; i<numSegs; i++) {
        equal_spacing.push( {o: i*gap, f: i*gap+gap, l: label[i%2], a: val[i%2] } );
    }

    allData = [ ground_truth, equal_spacing ]; 

    caAlgorithm = 1;
    hasStructuredAudio = true;
    }

    svgGTStructuredInit();
    svgCAStructuredInit(caAlgorithm);
    svgAudioDBInit();
}


allData = gs.documentMetadata["json.data"];

// ****

// The following is actually the XSLT page param
// 'p.yScaleSimImg;, which presumably automatically generates
// gs.cgiParams.yScaleSimImg (if present).  Defaults to 0.5

yScaleSimImg=gs.variables.cgiargYScaleSimImg || 0.5; 

caAlgorithm=gs.variables.cgiargCAAlgorithm;

$(function() {

    var audio = document.getElementById('rta-audio-element');
    audio.addEventListener('loadedmetadata', caaInit, false);

    audio.addEventListener('MozAudioAvailable', freqPlayerAudioAvailable, false);
    audio.addEventListener('loadedmetadata', freqPlayerLoadedAudioMetadata, false);

    audio.addEventListener('play',  freqPlayerAudioPlay,  false);
    audio.addEventListener('pause', freqPlayerAudioPause, false);
    audio.addEventListener('ended', freqPlayerAudioEnded, false);
      
});