deac/MIDI.js
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add noteOff/chordOff support for Audio Tag (does this sound ok without linear ramping?)

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Michael Deal 2013-01-25 21:31:02 -08:00
parent 0f3703e7e9
commit 1513ddafda
1 changed files with 30 additions and 7 deletions
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37
js/MIDI/Plugin.js
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@ -29,6 +29,7 @@ if (typeof (MIDI) === "undefined") var MIDI = {};
Web MIDI API - Native Soundbank Web MIDI API - Native Soundbank
-------------------------------------------- --------------------------------------------
https://dvcs.w3.org/hg/audio/raw-file/tip/midi/specification.html https://dvcs.w3.org/hg/audio/raw-file/tip/midi/specification.html
--------------------------------------------
*/ */
(function () { (function () {
@ -238,9 +239,11 @@ if (window.AudioContext || window.webkitAudioContext) (function () {
})(); })();
/* /*
--------------------------------------------
AudioTag <audio> - OGG or MPEG Soundbank AudioTag <audio> - OGG or MPEG Soundbank
-------------------------------------- --------------------------------------------
http://dev.w3.org/html5/spec/Overview.html#the-audio-element http://dev.w3.org/html5/spec/Overview.html#the-audio-element
--------------------------------------------
*/ */
if (window.Audio) (function () { if (window.Audio) (function () {
@ -291,20 +294,39 @@ if (window.Audio) (function () {
}; };
root.noteOff = function (channel, note, delay) { root.noteOff = function (channel, note, delay) {
setTimeout(function() {
channels[channel].pause();
}, delay * 1000)
}; };
root.chordOn = function (channel, chord, velocity, delay) { root.chordOn = function (channel, chord, velocity, delay) {
for (var key in chord) { for (var idx = 0; idx < chord.length; idx ++) {
var n = chord[key]; var n = chord[idx];
var id = note2id[n]; var id = note2id[n];
if (!notes[id]) continue; if (!notes[id]) continue;
playChannel(channel, id); if (delay) {
return window.setTimeout(function () {
playChannel(channel, id);
}, delay * 1000);
} else {
playChannel(channel, id);
}
} }
}; };
root.chordOff = function (channel, chord, delay) { root.chordOff = function (channel, chord, delay) {
for (var idx = 0; idx < chord.length; idx ++) {
var n = chord[idx];
var id = note2id[n];
if (!notes[id]) continue;
if (delay) {
return window.setTimeout(function () {
channels[channel].pause();
}, delay * 1000);
} else {
channels[channel].pause();
}
}
}; };
root.stopAllNotes = function () { root.stopAllNotes = function () {
@ -312,6 +334,7 @@ if (window.Audio) (function () {
channels[nid].pause(); channels[nid].pause();
} }
}; };
root.connect = function (callback) { root.connect = function (callback) {
var loading = {}; var loading = {};
for (var key in MIDI.keyToNote) { for (var key in MIDI.keyToNote) {
@ -320,7 +343,7 @@ if (window.Audio) (function () {
id: key id: key
}; };
} }
MIDI.technology = "HTML Audio Tag"; MIDI.technology = "Audio Tag";
MIDI.setVolume = root.setVolume; MIDI.setVolume = root.setVolume;
MIDI.programChange = root.programChange; MIDI.programChange = root.programChange;
MIDI.noteOn = root.noteOn; MIDI.noteOn = root.noteOn;