Trying to play a sound via javascript and want to change it dynamically using sessionstorage
The following is a simplified version that plays sound/s in android/FF Linux/Win when u click the "sprite me button" - I've included other buttons for the example to set and retrieve session values in HTML5.
http://globability.org/webapp/asprite20111124_8.html
The wiki below has Android phone specs where it works: (Samsung Galaxy SII) in case you're interested
http://globability.org/wiki/doku.php?id=current_working_specs_p-tab / also see http://globability.org/wiki/doku.php?id=mobile_pointing_tablet to get a proper idea about what it is that I am working on.
What I need is to have the "play soundsprite" javascript that you can see below in the following section load from sessionstorage and insert values loaded from sessionstorage inserted into an array.
I am not looking for any changes is how the sound is played back - just need to make a dynamically built array work from within the particular javascript.
The code below is based on the soundsprite idea from www.phpied.com/audio-sprites/ by Stoyan Stefanov - made to reduce the http calls needed for playing sounds... Also stabilizes the sound quality, less choppy sound etc.
Antway here goes: YOU ONLY NEED TO LOOK AT PSEUDOCODE SECTION - The rest is functioning
<script>
var thing = 'the thing';
function shut() {
if (typeof thing.pause !== 'undefined') {
thing.pause();
}
}
function log(what) {
document.getElementById('log').innerHTML += what + "<br>";
}
var spriteme = function(){
var sprites = {
// id: [start, length]
'blank':[0.1, 0.5], //This the first sprite, it has to be the first defined and is
called first, it is a blank piece of sound in the combined sound file and needed as of
now.
'success':[13, 2,5],
/* I would like to be able to set the parameters i.e. sound bite to play dynamically -
here a pseudocode example using session storage in preparation for getting the sound
parameters from a database
'wordgen'[null,null];
//this array should be dynamically built from values read from the two session storage keys not sure you need the new thing in HTML5
sessionStorage.globabilitykey1;
sessionStorage.globabilitykey2;
strkey1=globabilitykey1
strkey2=globabilitykey2
var gkey1=parsefloat(strkey1)
var gkey2=parsefloat(strkey2)
'wordgen':[gkey1,gkey2]
and then the idea is to replace the array success in the script with the "generated"
array 'wordgen' to allow dynamic seting of sound to play back */
//the following are sound bites from the collection of soundsprites the site plays from
'word1': [0.5, 2,36], //one
'word2': [3.1, 3.0], //two
'word3': [7.0, 1.82], //three
'word4': [10.03, 2], //four ?
},
song = ['blank', 'success'],
//here you're setting the playback sequence (this is where I would like to replace 'success' with 'wordgen'
current = 0,
id = song[current],
start = 0,
end = sprites[id][1],
int;
thing = document.getElementById('sprite');
thing.play();
log('file: ' + thing.currentSrc);
log(id + ': start: ' + sprites[id].join(', length: '));
// change
int = setInterval(function() {
if (thing.currentTime > end) {
thing.pause();
if (current === song.length - 1) {
clearInterval(int);
return;
}
current++;
id = song[current];
start = sprites[id][0];
end = start + sprites[id][1]
thing.currentTime = start;
thing.play();
log(id + ': start: ' + sprites[id].join(', length: '));
}
}, 10);
};
</script>
Any ideas on how to dynamically create the 'wordgen' array within the javascript based on the values is sessionstorage ?
The whole code/working example can be seen here: http://globability.org/webapp/asprite20111124_8.html
I know the page is one ugly mess... but this is an alpha prototype :)
