X-Git-Url: http://id.pley.net/sound.git/blobdiff_plain/c20b1f29d05b360d2314dc3189cee0a024b276ca..82e3a8a15e29c81d92cdb6432d9dad531c03063a:/sound.js

diff --git a/sound.js b/sound.js
index df5202e..4d29025 100644
--- a/sound.js
+++ b/sound.js
@@ -1,3 +1,24 @@
+/* Copyright (c) 2014 Jer Noble
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
 function Sound(src) {
 
 	if (Sound.audioContext === undefined) {
@@ -21,6 +42,9 @@ function Sound(src) {
 	this._volume = 1;
 	this._muted = false;
 	this._defaultMuted = false;
+	
+	this.selectResourceTimer = null;
+	this.fetchResourceTimer = null;
 
 	this.buffer = null;
 	this.node = null;
@@ -28,10 +52,13 @@ function Sound(src) {
 
 	this.ajax = null;
 	this.eventListeners = { };
-	this.shouldBePlaying = 0;
 	this.startTime = 0;
 	this.nextStartTime = 0;
 
+	this.autoplaying = false;
+	this.delayingTheLoadEvent = false;
+	this.sentLoadedData = false;
+
 	this.setSrc(src);
 }
 
@@ -67,14 +94,31 @@ Sound.prototype = {
 	},
 
 	load: function() {
-		if (this.ajax)
-			this.ajax.abort();
+		if (this.networkState === this.NETWORK.LOADING || this.networkState === this.NETWORK.IDLE)
+			this.dispatchEventAsync(new CustomEvent('abort'));
 
-		if (this.networkState === this.NETWORK.LOADING || this.networkState === this.NETWORK.IDLE) {
+		if (this.networkState !== this.NETWORK.EMPTY) {
 			this.dispatchEventAsync(new CustomEvent('emptied'));
-			this.setReadyState(this.READY.NOTHING);
+
+			if (this.ajax)
+				this.ajax.abort();
+
+			if (this.selectResourceTimer) {
+				clearTimeout(this.selectResourceTimer);
+				this.selectResourceTimer = null;
+			}
+
+			if (this.fetchResourceTimer) {
+				clearTimeout(this.fetchResourceTimer);
+				this.fetchResourceTimer = null;
+			}
+
+			if (this._readyState != this.READY.NOTHING)
+				this.setReadyState(this.READY.NOTHING);
+
 			if (!this._paused)
 				this.pause();
+
 			if (!this._seeking)
 				this._seeking = false;
 			this.setCurrentTime(0);
@@ -83,51 +127,111 @@ Sound.prototype = {
 
 		this.setPlaybackRate(this.defaultPlaybackRate);
 		this._error = null;
-		this.shouldBePlaying = this._autoplay;
+		this.autoplaying = true;
 		this.stopInternal();
+		this.sentLoadedData = false;
+
+		this.selectResource();
+	},
+
+	selectResource: function() {
+		this.setNetworkState(this.NETWORK.NO_SOURCE);
+		this.delayingTheLoadEvent = true;
+
+		this.selectResourceTimer = setTimeout(this.selectResourceAsync.bind(this), 0);
+	},
+
+	selectResourceAsync: function() {
+		this.selectResourceTimer = null;
 
 		if (!this._src) {
-			this._networkState = this.NETWORK.EMPTY;
+			this.setNetworkState(this.NETWORK.EMPTY);
 			return;
 		}
 
-		this._networkState = this.NETWORK.LOADING;
+		this.setNetworkState(this.NETWORK.LOADING);
 		this.dispatchEventAsync(new CustomEvent('loadstart'));
 
+		this.fetchResourceTimer = setTimeout(this.fetchResource(), 0);
+	},
+
+	fetchResource: function() {
+		this.fetchResourceTimer = null;
+
+		if (this._preload === this.PRELOAD.NONE) {
+			this.setNetworkState(this.NETWORK.IDLE);
+			this.dispatchEventAsync(new CustomEvent('suspend'));
+			this.delayingTheLoadEvent = false;
+			return;
+		}
+
 		this.ajax = new XMLHttpRequest();
 		this.ajax.open("GET", this._src, true);
 		this.ajax.responseType = "arraybuffer";
-		this.ajax.onload = function() {
-			if (!this.ajax.response)
-				return;
-			
-			this.setReadyState(this.READY.FUTURE_DATA);
-
-			try {
-				Sound.audioContext.decodeAudioData(
-					this.ajax.response, 
-					function(buffer) {
-						this.buffer = buffer;
-						if (this.shouldBePlaying)
-							this.play();
-					}.bind(this), 
-					function(error) { 
-						console.log("Error in creating buffer for sound '" + this._src + "': " + error); 
-					}.bind(this)
-				);
-			} catch(exception) {
-				console.log(exception);
-			}
-		}.bind(this);
-		this.ajax.onprogress = function() {
-			this.dispatchEventAsync(new CustomEvent('progress'));
-		}.bind(this);
+		this.ajax.onprogress = this.resourceFetchingProgressed.bind(this);
+		this.ajax.onload = this.resourceFetchingSucceeded.bind(this);
+		this.ajax.onerror = this.resourceFetchingFailed.bind(this);
 		this.ajax.send();
 	},
 
+	resourceFetchingProgressed: function() {
+		this.dispatchEventAsync(new CustomEvent('progress'));
+	},
+
+	resourceFetchingSucceeded: function() {
+		if (!this.ajax.response)
+			return;
+		
+		this.setNetworkState(this.NETWORK.IDLE);
+		this.dispatchEventAsync(new CustomEvent('suspend'));
+		this.setReadyState(this.READY.FUTURE_DATA);
+
+		try {
+			Sound.audioContext.decodeAudioData(
+				this.ajax.response,
+				this.resourceDecodingSucceeded.bind(this),
+				this.resourceDecodingFailed.bind(this)
+			);
+		} catch(exception) {
+			console.log(exception);
+		}
+	},
+
+	resourceFetchingFailed: function() {
+		this.error = { code: MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED };
+		this.setNetworkState(this.NETWORK.NO_SOURCE);
+		this.dispatchEventAsync(new CustomEvent('error'));
+		this.delayingTheLoadEvent = false;
+	},
+
+	resourceDecodingSucceeded: function(buffer) {
+		this.buffer = buffer;
+
+		this.setCurrentTime(0);
+		this.dispatchEventAsync(new CustomEvent('durationchange'));
+		this.setReadyState(this.READY.METADATA);
+
+		if (this.autoplaying && this._paused && this._autoplay)
+			this.play();
+		this.dispatchEventAsync(new CustomEvent('canplaythrough'));
+	},
+
+	resourceDecodingFailed: function(error) {
+		this._error = { code: HTMLMediaElement.MEDIA_ERR_DECODE };
+		this.dispatchEventAsync(new CustomEvent('error'));
+		if (this._readyState === this.READY.NOTHING) {
+			this.setNetworkState(this.NETWORK.EMPTY);
+			this.dispatchEventAsync('emptied');
+		} else
+			this.setNetworkState(this.NETWORK.IDLE);
+	},
+
 	play: function() {
+		if (this._networkState === this.NETWORK.EMPTY)
+			this.loadResource();
+
 		if (!this.buffer) {
-			this.shouldBePlaying = true;			
+			this.autoplaying = true;
 			return;
 		}
 
@@ -158,6 +262,8 @@ Sound.prototype = {
 		this.gainNode.gain.value = this._muted ? 0 : this._volume;
 		this.gainNode.connect(Sound.audioContext.destination);
 
+		this.startTime = Sound.audioContext.currentTime;
+
 		this.node = Sound.audioContext.createBufferSource();
 		this.node.connect(this.gainNode);
 		this.node.buffer = this.buffer;
@@ -168,6 +274,9 @@ Sound.prototype = {
 
 
 	pause: function() {
+		if (this._networkState === this.NETWORK.EMPTY)
+			this.loadResource();
+
 		this._autoplay = false;
 
 		if (!this._paused) {
@@ -252,7 +361,7 @@ Sound.prototype = {
 
 	setSrc: function(src) {
 		this._src = src;
-		if (this._autoplay || this._preload != this.PRELOAD.NONE)
+		if (this._src)
 			this.load();
 	},
 
@@ -264,12 +373,54 @@ Sound.prototype = {
 		return this._networkState;
 	},
 
+	setNetworkState: function(value) {
+		this._networkState = value;
+	},
+
 	getReadyState: function() {
 		return this._readyState;
 	},
 
 	setReadyState: function(value) {
-		this._readyState = value;
+		var oldState = this._readyState;
+		var newState = this._readyState = value;
+
+		if (this._networkState === this.NETWORK.EMPTY)
+			return;
+
+		if (oldState === this.READY.NOTHING && newState === this.READY.METADATA)
+			this.dispatchEventAsync('loadedmetadata');
+
+		if (oldState === this.READY.METADATA && newState >= this.READY.CURRENT_DATA) {
+			if (!this.sentLoadedData)
+				this.dispatchEventAsync('loadeddata');
+		}
+
+		if (oldState >= this.READY.FUTURE_DATA && newState <= this.READY.CURRENT_DATA) {
+			if (this.autoplaying && this._paused && this._autoplay && !this._ended && !this._error) {
+				this.dispatchEventAsync('timeupdate');
+				this.dispatchEventAsync('waiting');
+				this.nextStartTime = Sound.audioContext.currentTime - this.startTime;
+				this.stopInternal();
+			}
+		}
+
+		if (oldState <= this.READY.CURRENT_DATA && newState === this.READY.FUTURE_DATA) {
+			this.dispatchEventAsync('canplay');
+			if (!this._paused)
+				this.dispatchEventAsync('playing');
+		}
+
+		if (oldState <= this.READY.CURRENT_DATA && newState === this.READY.FUTURE_DATA) {
+			this.dispatchEventAsync('canplay');
+			if (!this._paused) {
+				this.dispatchEventAsync('playing');
+				this.playInternal();
+			}
+				
+			if (this.autoplaying && this._paused && this._autoplay)
+				this.play();
+		}
 	},
 
 	getPreload: function() {
@@ -303,7 +454,7 @@ Sound.prototype = {
 	getCurrentTime: function() {
 		if (!this.node)
 			return this.nextStartTime;
-		return this.nextStartTime + Sound.audioContext.currentTIme - this.startTime;
+		return this.nextStartTime + Sound.audioContext.currentTime - this.startTime;
 	},
 
 	setCurrentTime: function(time) {