From c9af7bb67bfefc3f37b4cdd4a066a29138f202b3 Mon Sep 17 00:00:00 2001
From: piernov <piernov@piernov.org>
Date: Thu, 13 Mar 2014 16:48:55 +0100
Subject: Importation du projet

---
 Processing-js/libs/inc/jasmid/replayer.js | 96 +++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 Processing-js/libs/inc/jasmid/replayer.js

(limited to 'Processing-js/libs/inc/jasmid/replayer.js')

diff --git a/Processing-js/libs/inc/jasmid/replayer.js b/Processing-js/libs/inc/jasmid/replayer.js
new file mode 100644
index 0000000..347fa1d
--- /dev/null
+++ b/Processing-js/libs/inc/jasmid/replayer.js
@@ -0,0 +1,96 @@
+var clone = function (o) {
+	if (typeof o != 'object') return (o);
+	if (o == null) return (o);
+	var ret = (typeof o.length == 'number') ? [] : {};
+	for (var key in o) ret[key] = clone(o[key]);
+	return ret;
+};
+
+function Replayer(midiFile, timeWarp, eventProcessor) {
+	var trackStates = [];
+	var beatsPerMinute = 120;
+	var ticksPerBeat = midiFile.header.ticksPerBeat;
+	
+	for (var i = 0; i < midiFile.tracks.length; i++) {
+		trackStates[i] = {
+			'nextEventIndex': 0,
+			'ticksToNextEvent': (
+				midiFile.tracks[i].length ?
+					midiFile.tracks[i][0].deltaTime :
+					null
+			)
+		};
+	}
+
+	var nextEventInfo;
+	var samplesToNextEvent = 0;
+	
+	function getNextEvent() {
+		var ticksToNextEvent = null;
+		var nextEventTrack = null;
+		var nextEventIndex = null;
+		
+		for (var i = 0; i < trackStates.length; i++) {
+			if (
+				trackStates[i].ticksToNextEvent != null
+				&& (ticksToNextEvent == null || trackStates[i].ticksToNextEvent < ticksToNextEvent)
+			) {
+				ticksToNextEvent = trackStates[i].ticksToNextEvent;
+				nextEventTrack = i;
+				nextEventIndex = trackStates[i].nextEventIndex;
+			}
+		}
+		if (nextEventTrack != null) {
+			/* consume event from that track */
+			var nextEvent = midiFile.tracks[nextEventTrack][nextEventIndex];
+			if (midiFile.tracks[nextEventTrack][nextEventIndex + 1]) {
+				trackStates[nextEventTrack].ticksToNextEvent += midiFile.tracks[nextEventTrack][nextEventIndex + 1].deltaTime;
+			} else {
+				trackStates[nextEventTrack].ticksToNextEvent = null;
+			}
+			trackStates[nextEventTrack].nextEventIndex += 1;
+			/* advance timings on all tracks by ticksToNextEvent */
+			for (var i = 0; i < trackStates.length; i++) {
+				if (trackStates[i].ticksToNextEvent != null) {
+					trackStates[i].ticksToNextEvent -= ticksToNextEvent
+				}
+			}
+			return {
+				"ticksToEvent": ticksToNextEvent,
+				"event": nextEvent,
+				"track": nextEventTrack
+			}
+		} else {
+			return null;
+		}
+	};
+	//
+	var midiEvent;
+	var temporal = [];
+	//
+	function processEvents() {
+		function processNext() {
+			if ( midiEvent.event.type == "meta" && midiEvent.event.subtype == "setTempo" ) {
+				// tempo change events can occur anywhere in the middle and affect events that follow
+				beatsPerMinute = 60000000 / midiEvent.event.microsecondsPerBeat;
+			} 
+			if (midiEvent.ticksToEvent > 0) {
+				var beatsToGenerate = midiEvent.ticksToEvent / ticksPerBeat;
+				var secondsToGenerate = beatsToGenerate / (beatsPerMinute / 60);
+			}
+			var time = (secondsToGenerate * 1000 * timeWarp) || 0;
+			temporal.push([ midiEvent, time]);
+			midiEvent = getNextEvent();
+		};
+		//
+		if (midiEvent = getNextEvent()) {
+			while(midiEvent) processNext(true);
+		}
+	};
+	processEvents();
+	return {
+		"getData": function() {
+			return clone(temporal);
+		}
+	};
+};
-- 
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