X-Git-Url: http://git.osdn.jp/view?a=blobdiff_plain;f=0.6.x%2Fjs%2F07_audio%2F01_XWebAudio.js;h=5e9729983e94853f23eb2e1e65ef42c14fd2e184;hb=512e08f4d38eab417f9651277e8a50c08535cb07;hp=6d634359044d19851bb780fc20eae131c5c3f514;hpb=ecfded871abcf085bbc2b862352232190b87fd27;p=pettanr%2FclientJs.git

diff --git a/0.6.x/js/07_audio/01_XWebAudio.js b/0.6.x/js/07_audio/01_XWebAudio.js
index 6d63435..5e97299 100644
--- a/0.6.x/js/07_audio/01_XWebAudio.js
+++ b/0.6.x/js/07_audio/01_XWebAudio.js
@@ -1,47 +1,141 @@
+var X_Audio_constructor = 3.1 <= X_UA[ 'Safari' ] && X_UA[ 'Safari' ] < 4 ?
+								function( s, a ){
+									//a = document.createElement( 'audio' );
+									//a.src = s;
+									//a.load();
+									return a;
+								} :
+						// Android1.6 + MobileOpera12 HTMLAudio はいるが呼ぶとクラッシュする
+						  !( X_UA[ 'Android' ] < 2 ) ?
+								window[ 'Audio' ] || window.HTMLAudioElement : null,
+	
+	// Blink5 Opera32 Win8 は HTMLAudio が壊れている、WebAudio は mp3 がデコードに失敗、ogg が動作
+	X_Audio_blinkOperaFix = X_UA[ 'BlinkOpera' ] && X_UA[ 'Windows' ],
+
+	X_Audio_codecs;
 
-var X_Audio_WebAudio_context = !X_UA[ 'iPhone_4s' ]  && !X_UA[ 'iPad_2Mini1' ]  && !X_UA[ 'iPod_4' ]  &&
-								// TODO なんで fennec を禁止?
-								!( X_UA[ 'Gecko' ] && X_UA[ 'Android' ] ) &&
-								// Firefox40.0.5 + Windows8 で音声が鳴らない
-								!( X_UA[ 'Gecko' ] === 40 && X_UA[ 'Windows' ] ) &&
+if( X_Audio_constructor ){
+	//http://himaxoff.blog111.fc2.com/blog-entry-97.html
+	//引数なしで new Audio() とすると、Operaでエラーになるそうなので注意。
+	X_TEMP.rawAudio = new X_Audio_constructor( '' );
+	
+	// https://html5experts.jp/miyuki-baba/3766/
+	// TODO Chrome for Android31 で HE-AAC が低速再生されるバグ
+	// TODO Android4 標準ブラウザで ogg のシークが正しくない！
+	if( X_TEMP.rawAudio.canPlayType ){
+		X_Audio_codecs = {
+		  'mp3'  : X_TEMP.rawAudio.canPlayType('audio/mpeg'),
+		  'opus' : X_TEMP.rawAudio.canPlayType('audio/ogg; codecs="opus"'),
+		  'ogg'  : X_TEMP.rawAudio.canPlayType('audio/ogg; codecs="vorbis"'),
+		  'wav'  : X_TEMP.rawAudio.canPlayType('audio/wav; codecs="1"'),
+		  'aac'  : X_TEMP.rawAudio.canPlayType('audio/aac'),
+		  'm4a'  : X_TEMP.rawAudio.canPlayType('audio/x-m4a') + X_TEMP.rawAudio.canPlayType('audio/m4a') + X_TEMP.rawAudio.canPlayType('audio/aac'),
+		  'mp4'  : X_TEMP.rawAudio.canPlayType('audio/x-mp4') + X_TEMP.rawAudio.canPlayType('audio/mp4') + X_TEMP.rawAudio.canPlayType('audio/aac'),
+		  'weba' : X_TEMP.rawAudio.canPlayType('audio/webm; codecs="vorbis"')
+		};
+		(function( X_Audio_codecs, k, v ){
+			for( k in X_Audio_codecs ){
+				//if( X_EMPTY_OBJECT[ k ] ) continue;
+				v = X_Audio_codecs[ k ];
+				v = v && !!( v.split( 'no' ).join( '' ) );
+				if( v ){
+					console.log( k + ' ' + X_Audio_codecs[ k ] );
+					X_Audio_codecs[ k ] = true;
+				} else {
+					delete X_Audio_codecs[ k ];
+				};
+			};
+			if( X_Audio_blinkOperaFix ) delete X_Audio_codecs[ 'mp3' ];
+		})( X_Audio_codecs );
+	} else {
+		// iOS3.2.3
+		X_Audio_codecs = {
+		  'mp3'  : X_UA[ 'IE' ] || X_UA[ 'Chrome' ] || ( X_UA[ 'Windows' ] && X_UA[ 'Safari' ]  ),
+		  'ogg'  : 5 <= X_UA[ 'Gecko' ] || X_UA[ 'Chrome' ] || X_UA[ 'Opera' ] ,
+		  'wav'  : X_UA[ 'Gecko' ] || X_UA[ 'Opera' ] || ( X_UA[ 'Windows' ] && X_UA[ 'Safari' ]  ),
+		  'aac'  : X_UA[ 'IE' ] || X_UA[ 'WebKit' ],
+		  'm4a'  : X_UA[ 'IE' ] || X_UA[ 'WebKit' ],
+		  'mp4'  : X_UA[ 'IE' ] || X_UA[ 'WebKit' ],
+		  'weba' : 2 <= X_UA[ 'Gecko' ] || 10.6 <= X_UA[ 'Opera' ] // firefox4+(Gecko2+)
+		};
+		(function( X_Audio_codecs, k ){
+			for( k in X_Audio_codecs ){
+				//if( X_EMPTY_OBJECT[ k ] ) continue;
+				if( X_Audio_codecs[ k ] ){
+					console.log( k + ' ' + X_Audio_codecs[ k ] );
+					X_Audio_codecs[ k ] = true;
+				} else {
+					delete X_Audio_codecs[ k ];
+				};
+			};
+		})( X_Audio_codecs );
+	};
+	
+	if( X_Audio_blinkOperaFix ){
+		X_Audio_constructor = null;
+		delete X_TEMP.rawAudio;
+	};
+};
+
+
+var X_WebAudio_context      =	// 4s 以下ではない iPad 2G または iPad mini 1G 以下ではない, iPod touch 4G 以下ではない
+								!X_UA[ 'iPhone_4s' ] && !X_UA[ 'iPad_2Mini1' ] && !X_UA[ 'iPod_4' ] &&
+								// iOS7 以上で HTML Audio が鳴らない問題を見ていくよ
+								// !X_UA[ 'iOS' ] &&
+								// Android2 + Gecko で WebAudio が極めて不安定
+								!( X_UA[ 'Fennec' ] && X_UA[ 'Android' ] < 3 ) &&
+								// AOSP でも WebAudio を不完全に実装するものがある, touch の有無も不明のため一律に切ってしまう
+								!X_UA[ 'AOSP' ] && !( X_UA[ 'ChromeWV' ] < 5 ) &&
+								// Blink HTMLAudio 調査用
+								//!X_UA[ 'Blink' ] &&
+								// Firefox40.0.5 + Windows8 で音声が途中から鳴らなくなる
+								// Firefox41.0.1 + Windows8 で音声が途中から鳴らなくなる
+								!( 40 <= X_UA[ 'Gecko' ] && X_UA[ 'Gecko' ] < 45 && X_UA[ 'Windows' ] ) &&
 								( window[ 'AudioContext' ] || window[ 'webkitAudioContext' ] ),
-	X_Audio_BUFFER_LIST      = [],
-	X_Audio_WebAudioWrapper,
-	X_Audio_BufferLoader,
-	X_Audio_fpsFix;
+	X_WebAudio_BUFFER_LIST  = [],
+	X_WebAudio_need1stTouch	= X_UA[ 'iOS' ],
+	X_WebAudio_touchState   = X_WebAudio_need1stTouch,
+	X_WebAudio,
+	X_WebAudio_BufferLoader,
+	X_WebAudio_fpsFix;
 
 /*
  * iPhone 4s 以下、iPad2以下、iPad mini 1以下, iPod touch 4G 以下は不可
  */
-if( X_Audio_WebAudio_context ){
+if( X_WebAudio_context ){
 	
-	X_Audio_WebAudio_context = new X_Audio_WebAudio_context;
+	X_WebAudio_context = new X_WebAudio_context;
 	
-	X_Audio_BufferLoader = X_EventDispatcher[ 'inherits' ](
+	X_WebAudio_BufferLoader = X_EventDispatcher[ 'inherits' ](
 		'X.WebAudio.BufferLoader',
 		X_Class.POOL_OBJECT,
 		{
-			url             : '',
+			audioUrl        : '',
             xhr             : null,
             onDecodeSuccess : null,
             onDecodeError   : null,
             
-            buffer          : null,
-            error           : 0,
+            audioBuffer     : null,
+            errorState      : 0,
             webAudioList    : null,
             
 			'Constructor' : function( webAudio, url ){
 				this.webAudioList = [ webAudio ];
-				this.url = url;
+				this.audioUrl     = url;
 				this.xhr = X[ 'Net' ]( { 'xhr' : url, 'dataType' : 'arraybuffer' } )
 									[ 'listen' ]( X_EVENT_PROGRESS, this )
 									[ 'listenOnce' ]( [ X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
+				X_WebAudio_BUFFER_LIST.push( this );
 			},
 			
 			handleEvent : function( e ){
+				var i, l;
+				
 				switch( e.type ){
 					case X_EVENT_PROGRESS :
-						this[ 'dispatch' ]( { type : 'progress', 'percent' : e[ 'percent' ] } );
+						for( i = 0, l = this.webAudioList.length; i < l; ++i ){
+							this.webAudioList[ i ][ 'dispatch' ]( { type : X_EVENT_PROGRESS, 'percent' : e[ 'percent' ] } );
+						};
 						return;
 					
 					case X_EVENT_SUCCESS :
@@ -52,18 +146,18 @@ if( X_Audio_WebAudio_context ){
 					// iOS 7.1 で decodeAudioData に処理が入った瞬間にスクリーンを長押しする（スクロールを繰り返す）と
 					// decoeAudioData の処理がキャンセルされることがある（エラーやコールバックの発火もなく、ただ処理が消滅する）。
 					// ただし iOS 8.1.2 では エラーになる
-						if( X_UA[ 'iOS' ] < 8 || !X_Audio_WebAudio_context[ 'decodeAudioData' ] ){
-							this._onDecodeSuccess( X_Audio_WebAudio_context[ 'createBuffer' ]( e.response, false ) );
+						if( X_UA[ 'iOS' ] < 8 || !X_WebAudio_context[ 'decodeAudioData' ] ){
+							this._onDecodeSuccess( X_WebAudio_context[ 'createBuffer' ]( e.response, false ) );
 						} else
-						if( X_Audio_WebAudio_context[ 'decodeAudioData' ] ){
-							X_Audio_WebAudio_context[ 'decodeAudioData' ]( e.response,
+						if( X_WebAudio_context[ 'decodeAudioData' ] ){
+							X_WebAudio_context[ 'decodeAudioData' ]( e.response,
 								this.onDecodeSuccess = X_Closure_create( this, this._onDecodeSuccess ),
 								this.onDecodeError   = X_Closure_create( this, this._onDecodeError ) );
 						};
 						break;
 
 					case X_EVENT_COMPLETE :
-						this.error = 1;				
+						this.errorState = 1;				
 						this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 						break;
 				};
@@ -72,17 +166,17 @@ if( X_Audio_WebAudio_context ){
 			},
 			
 				_onDecodeSuccess : function( buffer ){
-					console.log( 'WebAudio decode success!' );
-					
 					this.onDecodeSuccess && this._onDecodeComplete();
 					
-	                if ( !buffer ) {
-	                	this.error = 2;
+	                if( !buffer ){
+	                	this.errorState = 2;
 	                    this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 	                    return;
 	                };
+	                
+	                console.log( 'WebAudio decode success!' );
 	
-	                this.buffer   = buffer;
+	                this.audioBuffer = buffer;
 
 					this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 
@@ -92,7 +186,7 @@ if( X_Audio_WebAudio_context ){
 				_onDecodeError : function(){
 					console.log( 'WebAudio decode error!' );
 					this._onDecodeComplete();
-					this.error = 2;
+					this.errorState = 2;
 					this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 				},
 				
@@ -106,9 +200,10 @@ if( X_Audio_WebAudio_context ){
 			unregister : function( webAudio ){
 				var list = this.webAudioList,
 					i    = list.indexOf( webAudio );
+
 				if( 0 < i ){
 					list.splice( i, 1 );
-					if( list.length ){
+					if( !list.length ){
 						this.xhr && this.xhr[ 'kill' ]();
 						this[ 'kill' ]();
 					};
@@ -119,7 +214,7 @@ if( X_Audio_WebAudio_context ){
 	);
 	
 	
-	X_Audio_WebAudioWrapper = X_Audio_AbstractAudioBackend[ 'inherits' ](
+	X_WebAudio = X_AudioBase[ 'inherits' ](
 		'X.WebAudio',
 		X_Class.POOL_OBJECT,
 		{
@@ -131,14 +226,14 @@ if( X_Audio_WebAudio_context ){
 			_startTime      : 0,
             _timerID        : 0,
             _interval       : 0,
-          	buffer          : null,
+          	audioBuffer     : null,
           	bufferSource    : null,
             gainNode        : null,
             _onended        : null,
             
-			'Constructor' : function( target, url, option ){				
+			'Constructor' : function( disatcher, url, option ){				
 				var i = 0,
-					l = X_Audio_BUFFER_LIST.length,
+					l = X_WebAudio_BUFFER_LIST.length,
 					loader;
 
 				/*
@@ -146,14 +241,14 @@ if( X_Audio_WebAudio_context ){
 				 * L-01F 等の一部端末で Web Audio API の再生結果に特定条件下でノイズが混ざることがある。
 				 * 描画レート（描画 FPS）が下がるとノイズが混ざり始め、レートを上げると再生結果が正常になるというもので、オーディオ処理が描画スレッドに巻き込まれているような動作を見せる。
 				 */
-				if( X_UA[ 'Android' ] && X_UA[ 'Chrome' ] && !X_Audio_fpsFix ){
+				if( X_UA[ 'Android' ] && X_UA[ 'Chrome' ] && !X_WebAudio_fpsFix ){
 					X_Node_systemNode.create( 'div', { id : 'fps-slowdown-make-sound-noisy' } );
-					X_Audio_fpsFix = true;
+					X_WebAudio_fpsFix = true;
 				};
 
 				for( ; i < l; ++i ){
-					loader = X_Audio_BUFFER_LIST[ i ];
-					if( loader.url === url ){
+					loader = X_WebAudio_BUFFER_LIST[ i ];
+					if( loader.audioUrl === url ){
 						this.loader = loader;
 						loader.webAudioList.push( this );
 						break;
@@ -161,16 +256,15 @@ if( X_Audio_WebAudio_context ){
 				};
 				
 				if( !this.loader ){
-					this.loader = loader = new X_Audio_BufferLoader( this, url );
+					this.loader = loader = X_WebAudio_BufferLoader( this, url );
 				};
 				
-				this.target  = target || this;
-				
+				this.disatcher = disatcher || this;
 				this.setState( option );
 				
 				this[ 'listenOnce' ]( X_EVENT_KILL_INSTANCE, this.onKill );
 				
-				if( loader.buffer || loader.error ){
+				if( loader.audioBuffer || loader.errorState ){
 					this._onLoadBufferComplete();
 				} else {
 					loader[ 'listenOnce' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
@@ -181,7 +275,7 @@ if( X_Audio_WebAudio_context ){
 				this.loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete )
 					.unregister( this );
 
-				delete this.buffer;
+				delete this.audioBuffer;
 				
 				this.playing      && this.actualPause();
 	            this.bufferSource && this._sourceDispose();
@@ -192,17 +286,16 @@ if( X_Audio_WebAudio_context ){
 			},
 				_onLoadBufferComplete : function( e ){
 					var loader = this.loader,
-						buffer = loader.buffer;
+						buffer = loader.audioBuffer;
 					
 					e && loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 					
 	                if ( !buffer ) {
-	                	this.error = loader.error;
-	                	
-	                    this.target[ 'dispatch' ]({
+	                	this.error = loader.errorState;
+	                    this.disatcher[ 'dispatch' ]({
 								type    : X_EVENT_ERROR,
-								error   : loader.error,
-								message : loader.error === 1 ?
+								error   : loader.errorState,
+								message : loader.errorState === 1 ?
 											'load buffer network error' :
 											'buffer decode error'
 							});
@@ -210,50 +303,60 @@ if( X_Audio_WebAudio_context ){
 	                    return;
 	                };
 	
-	                this.buffer   = buffer;
-	                this.duration = buffer.duration * 1000;
+	                this.audioBuffer = buffer;
+	                this.duration    = buffer.duration * 1000;
 
-					this.target[ 'asyncDispatch' ]( X_EVENT_READY );
-	                
-	                console.log( 'WebAudio buffer ready' );
-	                
-	                this.autoplay && X_Timer_once( 16, this, this.play );
-					
+					this.disatcher[ 'asyncDispatch' ]( X_WebAudio_touchState ? X_EVENT_MEDIA_TOUCH_FOR_LOAD : X_EVENT_READY );
 				},
 			
 			actualPlay : function(){
-				var begin, end;
+				var e, begin, end;
+				
+				console.log( '[WebAudio] play abuf:' + !!this.audioBuffer );
 				
-	            if( !this.buffer ){
-	            	this.autoplay = true;
+	            if( !this.audioBuffer ){
+	            	this._playReserved = true;
 	            	return;
 	            };
 				
-				end   = X_AudioWrapper_getEndTime( this );
-				begin = X_AudioWrapper_getStartTime( this, end, true );
+				if( X_WebAudio_touchState ){
+					e = X_EventDispatcher_CURRENT_EVENTS[ X_EventDispatcher_CURRENT_EVENTS.length - 1 ];
+					if( !e || !e[ 'pointerType' ] ){
+						// alert( 'タッチイベント以外での play! ' + ( e ? e.type : '' ) );
+						return;
+					};
+					// http://qiita.com/uupaa/items/e5856e3cb2a9fc8c5507
+					// iOS9 + touchstart で呼んでいた場合、 X_ViewPort['listenOnce']('pointerup',this,this.actualPlay())
+					this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );
+				};
+				X_WebAudio_touchState = false;
+				
+				end   = X_Audio_getEndTime( this );
+				begin = X_Audio_getStartTime( this, end, true );
 				
 				console.log( '[WebAudio] play ' + begin + ' -> ' + end );
 				
 				if( this.bufferSource ) this._sourceDispose();
 				if( !this.gainNode ){
-					this.gainNode = X_Audio_WebAudio_context[ 'createGain' ] ? X_Audio_WebAudio_context[ 'createGain' ]() : X_Audio_WebAudio_context[ 'createGainNode' ]();
-	            	this.gainNode[ 'connect' ]( X_Audio_WebAudio_context[ 'destination' ] );
+					this.gainNode = X_WebAudio_context[ 'createGain' ] ? X_WebAudio_context[ 'createGain' ]() : X_WebAudio_context[ 'createGainNode' ]();
+	            	this.gainNode[ 'connect' ]( X_WebAudio_context[ 'destination' ] );
 				};
-	            this.bufferSource        = X_Audio_WebAudio_context[ 'createBufferSource' ]();
-	            this.bufferSource.buffer = this.buffer;
+	            this.bufferSource        = X_WebAudio_context[ 'createBufferSource' ]();
+	            this.bufferSource.buffer = this.audioBuffer;
 	            this.bufferSource[ 'connect' ]( this.gainNode );
 	            
 	            this.gainNode[ 'gain' ].value = this.gain;
 	            
 	            // おかしい、stop 前に外していても呼ばれる、、、@Firefox33.1
 	            // 破棄された X.Callback が呼ばれて、obj.proxy() でエラーになる。Firefox では、onended は使わない
-                if( false && this.bufferSource.onended !== undefined ){
+	            // 多くのブラウザで onended は timer を使ったカウントより遅いので使わない
+                //if( this.bufferSource.onended !== undefined ){
                 	//console.log( '> use onended' );
-                	this.bufferSource.onended = this._onended || ( this._onended = X_Closure_create( this, this._onEnded ) );
-                } else {
+                	//this.bufferSource.onended = this._onended || ( this._onended = X_Closure_create( this, this._onEnded ) );
+                //} else {
                 	this._timerID && X_Timer_remove( this._timerID );
 					this._timerID = X_Timer_once( end - begin, this, this._onEnded );
-                };
+                //};
 	
 	            if( this.bufferSource.start ){
 	                this.bufferSource.start( 0, begin / 1000, end / 1000 );
@@ -264,13 +367,13 @@ if( X_Audio_WebAudio_context ){
 	            this.playing      = true;
 	            this._startPos    = begin;
 	            this._endPosition = end;
-	            this._startTime   = X_Audio_WebAudio_context.currentTime * 1000;
+	            this._startTime   = X_WebAudio_context.currentTime * 1000;
 	            this._interval    = this._interval || X_Timer_add( 1000, 0, this, this._onInterval );
 			},
 			
 				_sourceDispose : function(){
 		            this.bufferSource.disconnect();
-		            delete this.bufferSource.onended;
+		            //delete this.bufferSource.onended;
 		            delete this.bufferSource;
 		        },
 
@@ -279,7 +382,7 @@ if( X_Audio_WebAudio_context ){
 						delete this._interval;
 						return X_CALLBACK_UN_LISTEN;
 					};
-					this.target[ 'dispatch' ]( X_EVENT_MEDIA_PLAYING );
+					this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_PLAYING );
 				},
 						
 				_onEnded : function(){
@@ -287,14 +390,14 @@ if( X_Audio_WebAudio_context ){
 					delete this._timerID;
 					
 		            if( this.playing ){
-		            	time = X_Audio_WebAudio_context.currentTime * 1000 - this._startTime - this._endPosition + this._startPos | 0;
-		            	//console.log( '> onEnd ' + ( this.playing && ( X_Audio_WebAudio_context.currentTime * 1000 - this._startTime ) ) + ' < ' + ( this._endPosition - this._startPos ) );
+		            	time = X_WebAudio_context.currentTime * 1000 - this._startTime - this._endPosition + this._startPos | 0;
+		            	//console.log( '> onEnd ' + ( this.playing && ( X_WebAudio_context.currentTime * 1000 - this._startTime ) ) + ' < ' + ( this._endPosition - this._startPos ) );
 		            	if( this._onended ){
 			            	// Firefox 用の対策,,,
 			            	if( time < 0 ) return;
 		            	} else {
 		            		if( time < 0 ){
-		            			//console.log( '> onEnd crt:' + ( X_Audio_WebAudio_context.currentTime * 1000 ) + ' startTime:' + this._startTime +
+		            			//console.log( '> onEnd crt:' + ( X_WebAudio_context.currentTime * 1000 ) + ' startTime:' + this._startTime +
 		            			//	' from:' + this._startPos + ' to:' + this._endPosition );
 		            			this._timerID = X_Timer_once( -time, this, this._onEnded );
 		            			return;
@@ -302,31 +405,27 @@ if( X_Audio_WebAudio_context ){
 		            	};
 		            	
 		            	if( this.autoLoop ){
-		            		if( !( this.target[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){
+		            		if( !( this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){
 		            			this.looped = true;
-		            			this.target[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );
+		            			this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );
 		            			this.actualPlay();
 			            	};
 		            	} else {
 		            		this.actualPause();
-		            		this.target[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );
+		            		this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );
 		            	};
 		            };
 				},
 			
 			actualPause : function(){
-				//if( !this.playing ) return this;
-				
 				console.log( '[WebAudio] pause' );
 				
-				this.seekTime = this.getActualCurrentTime();
-				
 	            this._timerID && X_Timer_remove( this._timerID );
 				delete this._timerID;
 				delete this.playing;
 
 	            if( this.bufferSource ){
-	            	if( this.bufferSource.onended ) delete this.bufferSource.onended;
+	            	//if( this.bufferSource.onended ) delete this.bufferSource.onended;
 	            	
 	                this.bufferSource.stop ? 
 	                	this.bufferSource.stop( 0 ) : this.bufferSource[ 'noteOff' ]( 0 );
@@ -334,7 +433,7 @@ if( X_Audio_WebAudio_context ){
 			},
 			
 			getActualCurrentTime : function(){
-				return X_Audio_WebAudio_context.currentTime * 1000 - this._startTime + this._startPos | 0;
+				return X_WebAudio_context.currentTime * 1000 - this._startTime + this._startPos | 0;
 			},
 			
 			afterUpdateState : function( result ){
@@ -351,16 +450,17 @@ if( X_Audio_WebAudio_context ){
 
 	X_Audio_BACKENDS.push(
 		{
-			backendName : 'Web Audio',
+			backendID   : 1,
+			
+			backendName : 'WebAudio',
 
-			canPlay : {}, // TODO HTMLAudio と同じ
+			canPlay     : X_Audio_codecs,
 
-			// 
-			detect : function( proxy, source, ext ){
+			detect      : function( proxy, source, ext ){
 				proxy[ 'asyncDispatch' ]( { type : X_EVENT_COMPLETE, canPlay : X_Audio_codecs[ ext ] } );
 			},
 			
-			klass : X_Audio_WebAudioWrapper
+			klass : X_WebAudio
 		}
 	);
 };