0.6.x/js/07_audio/01_XWebAudio.js

   1 var X_Audio_constructor = 3.1 <= X_UA[ 'Safari' ] && X_UA[ 'Safari' ] < 4 ?
   2                                                                 function( s, a ){
   3                                                                         //a = document.createElement( 'audio' );
   4                                                                         //a.src = s;
   5                                                                         //a.load();
   6                                                                         return a;
   7                                                                 } :
   8                                                 // Android1.6 + MobileOpera12 HTMLAudio はいるが呼ぶとクラッシュする
   9                                                   !( X_UA[ 'Android' ] < 2 ) ?
  10                                                                 window[ 'Audio' ] || window.HTMLAudioElement : null,
  11
  12         // 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
  13         X_Audio_blinkOperaFix = X_UA[ 'BlinkOpera' ] && X_UA[ 'Windows' ],
  14
  15         X_Audio_codecs;
  16
  17 if( X_Audio_constructor ){
  18         //http://himaxoff.blog111.fc2.com/blog-entry-97.html
  19         //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。
  20         X_TEMP.rawAudio = new X_Audio_constructor( '' );
  21
  22         // https://html5experts.jp/miyuki-baba/3766/
  23         // TODO Chrome for Android31 で HE-AAC が低速再生されるバグ
  24         // TODO Android4 標準ブラウザで ogg のシークが正しくない！
  25         if( X_TEMP.rawAudio.canPlayType ){
  26                 X_Audio_codecs = {
  27                   'mp3'  : X_TEMP.rawAudio.canPlayType('audio/mpeg'),
  28                   'opus' : X_TEMP.rawAudio.canPlayType('audio/ogg; codecs="opus"'),
  29                   'ogg'  : X_TEMP.rawAudio.canPlayType('audio/ogg; codecs="vorbis"'),
  30                   'wav'  : X_TEMP.rawAudio.canPlayType('audio/wav; codecs="1"'),
  31                   'aac'  : X_TEMP.rawAudio.canPlayType('audio/aac'),
  32                   'm4a'  : X_TEMP.rawAudio.canPlayType('audio/x-m4a') + X_TEMP.rawAudio.canPlayType('audio/m4a') + X_TEMP.rawAudio.canPlayType('audio/aac'),
  33                   'mp4'  : X_TEMP.rawAudio.canPlayType('audio/x-mp4') + X_TEMP.rawAudio.canPlayType('audio/mp4') + X_TEMP.rawAudio.canPlayType('audio/aac'),
  34                   'weba' : X_TEMP.rawAudio.canPlayType('audio/webm; codecs="vorbis"')
  35                 };
  36                 (function( X_Audio_codecs, k, v ){
  37                         for( k in X_Audio_codecs ){
  38                                 //if( X_EMPTY_OBJECT[ k ] ) continue;
  39                                 v = X_Audio_codecs[ k ];
  40                                 v = v && !!( v.split( 'no' ).join( '' ) );
  41                                 if( v ){
  42                                         console.log( k + ' ' + X_Audio_codecs[ k ] );
  43                                         X_Audio_codecs[ k ] = true;
  44                                 } else {
  45                                         delete X_Audio_codecs[ k ];
  46                                 };
  47                         };
  48                         if( X_Audio_blinkOperaFix ) delete X_Audio_codecs[ 'mp3' ];
  49                 })( X_Audio_codecs );
  50         } else {
  51                 // iOS3.2.3
  52                 X_Audio_codecs = {
  53                   'mp3'  : X_UA[ 'IE' ] || X_UA[ 'Chrome' ] || ( X_UA[ 'Windows' ] && X_UA[ 'Safari' ]  ),
  54                   'ogg'  : 5 <= X_UA[ 'Gecko' ] || X_UA[ 'Chrome' ] || X_UA[ 'Opera' ] ,
  55                   'wav'  : X_UA[ 'Gecko' ] || X_UA[ 'Opera' ] || ( X_UA[ 'Windows' ] && X_UA[ 'Safari' ]  ),
  56                   'aac'  : X_UA[ 'IE' ] || X_UA[ 'WebKit' ],
  57                   'm4a'  : X_UA[ 'IE' ] || X_UA[ 'WebKit' ],
  58                   'mp4'  : X_UA[ 'IE' ] || X_UA[ 'WebKit' ],
  59                   'weba' : 2 <= X_UA[ 'Gecko' ] || 10.6 <= X_UA[ 'Opera' ] // firefox4+(Gecko2+)
  60                 };
  61                 (function( X_Audio_codecs, k ){
  62                         for( k in X_Audio_codecs ){
  63                                 //if( X_EMPTY_OBJECT[ k ] ) continue;
  64                                 if( X_Audio_codecs[ k ] ){
  65                                         console.log( k + ' ' + X_Audio_codecs[ k ] );
  66                                         X_Audio_codecs[ k ] = true;
  67                                 } else {
  68                                         delete X_Audio_codecs[ k ];
  69                                 };
  70                         };
  71                 })( X_Audio_codecs );
  72         };
  73
  74         if( X_Audio_blinkOperaFix ){
  75                 X_Audio_constructor = null;
  76                 delete X_TEMP.rawAudio;
  77         };
  78 };
  79
  80
  81 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
  82                                                                 !X_UA[ 'iPhone_4s' ]  && !X_UA[ 'iPad_2Mini1' ]  && !X_UA[ 'iPod_4' ]  &&
  83                                                                 // Android2 + Gecko で WebAudio が極めて不安定
  84                                                                 !( X_UA[ 'Fennec' ] && X_UA[ 'Android' ] < 3 ) &&
  85                                                                 // AOSP でも WebAudio を不完全に実装するものがある
  86                                                                 !X_UA[ 'AOSP' ] && !( X_UA[ 'ChromeWV' ] < 5 ) &&
  87                                                                 // Blink HTMLAudio 調査用
  88                                                                 //!X_UA[ 'Blink' ] &&
  89                                                                 // Firefox40.0.5 + Windows8 で音声が途中から鳴らなくなる
  90                                                                 // Firefox41.0.1 + Windows8 で音声が途中から鳴らなくなる
  91                                                                 !( 40 <= X_UA[ 'Gecko' ] && X_UA[ 'Gecko' ] < 42 && X_UA[ 'Windows' ] ) &&
  92                                                                 ( window[ 'AudioContext' ] || window[ 'webkitAudioContext' ] ),
  93         X_WebAudio_BUFFER_LIST  = [],
  94         X_WebAudio_need1stTouch = X_UA[ 'iOS' ],
  95         X_WebAudio_touchState   = X_WebAudio_need1stTouch,
  96         X_WebAudio,
  97         X_WebAudio_BufferLoader,
  98         X_WebAudio_fpsFix;
  99
 100 /*
 101  * iPhone 4s 以下、iPad2以下、iPad mini 1以下, iPod touch 4G 以下は不可
 102  */
 103 if( X_WebAudio_context ){
 104
 105         X_WebAudio_context = new X_WebAudio_context;
 106
 107         X_WebAudio_BufferLoader = X_EventDispatcher[ 'inherits' ](
 108                 'X.WebAudio.BufferLoader',
 109                 X_Class.POOL_OBJECT,
 110                 {
 111                         audioUrl        : '',
 112             xhr             : null,
 113             onDecodeSuccess : null,
 114             onDecodeError   : null,
 115
 116             audioBuffer     : null,
 117             errorState      : 0,
 118             webAudioList    : null,
 119
 120                         'Constructor' : function( webAudio, url ){
 121                                 this.webAudioList = [ webAudio ];
 122                                 this.audioUrl     = url;
 123                                 this.xhr = X[ 'Net' ]( { 'xhr' : url, 'dataType' : 'arraybuffer' } )
 124                                                                         [ 'listen' ]( X_EVENT_PROGRESS, this )
 125                                                                         [ 'listenOnce' ]( [ X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 126                                 X_WebAudio_BUFFER_LIST.push( this );
 127                         },
 128
 129                         handleEvent : function( e ){
 130                                 var i, l;
 131
 132                                 switch( e.type ){
 133                                         case X_EVENT_PROGRESS :
 134                                                 for( i = 0, l = this.webAudioList.length; i < l; ++i ){
 135                                                         this.webAudioList[ i ][ 'dispatch' ]( { type : X_EVENT_PROGRESS, 'percent' : e[ 'percent' ] } );
 136                                                 };
 137                                                 return;
 138
 139                                         case X_EVENT_SUCCESS :
 140                                         // TODO 旧api
 141                                         // https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API/Porting_webkitAudioContext_code_to_standards_based_AudioContext
 142
 143                                         // http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 144                                         // 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
 145                                         // 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）。
 146                                         // ただし iOS 8.1.2 では エラーになる
 147                                                 if( X_UA[ 'iOS' ] < 8 || !X_WebAudio_context[ 'decodeAudioData' ] ){
 148                                                         this._onDecodeSuccess( X_WebAudio_context[ 'createBuffer' ]( e.response, false ) );
 149                                                 } else
 150                                                 if( X_WebAudio_context[ 'decodeAudioData' ] ){
 151                                                         X_WebAudio_context[ 'decodeAudioData' ]( e.response,
 152                                                                 this.onDecodeSuccess = X_Closure_create( this, this._onDecodeSuccess ),
 153                                                                 this.onDecodeError   = X_Closure_create( this, this._onDecodeError ) );
 154                                                 };
 155                                                 break;
 156
 157                                         case X_EVENT_COMPLETE :
 158                                                 this.errorState = 1;
 159                                                 this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 160                                                 break;
 161                                 };
 162                                 this.xhr[ 'unlisten' ]( [ X_EVENT_PROGRESS, X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 163                                 delete this.xhr;
 164                         },
 165
 166                                 _onDecodeSuccess : function( buffer ){
 167                                         this.onDecodeSuccess && this._onDecodeComplete();
 168
 169                         if ( !buffer ) {
 170                                 this.errorState = 2;
 171                             this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 172                             return;
 173                         };
 174
 175                         console.log( 'WebAudio decode success!' );
 176
 177                         this.audioBuffer = buffer;
 178
 179                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 180
 181                         console.log( 'WebAudio decoded!' );
 182                                 },
 183
 184                                 _onDecodeError : function(){
 185                                         console.log( 'WebAudio decode error!' );
 186                                         this._onDecodeComplete();
 187                                         this.errorState = 2;
 188                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 189                                 },
 190
 191                                 _onDecodeComplete : function(){
 192                                         X_Closure_correct( this.onDecodeSuccess );
 193                                         delete this.onDecodeSuccess;
 194                                         X_Closure_correct( this.onDecodeError );
 195                                         delete this.onDecodeError;
 196                                 },
 197
 198                         unregister : function( webAudio ){
 199                                 var list = this.webAudioList,
 200                                         i    = list.indexOf( webAudio );
 201                                 if( 0 < i ){
 202                                         list.splice( i, 1 );
 203                                         if( !list.length ){
 204                                                 this.xhr && this.xhr[ 'kill' ]();
 205                                                 this[ 'kill' ]();
 206                                         };
 207                                 };
 208                         }
 209
 210                 }
 211         );
 212
 213
 214         X_WebAudio = X_AudioBase[ 'inherits' ](
 215                 'X.WebAudio',
 216                 X_Class.POOL_OBJECT,
 217                 {
 218
 219                         loader          : null,
 220
 221                         _startPos       : 0,
 222                         _endPosition    : 0,
 223                         _startTime      : 0,
 224             _timerID        : 0,
 225             _interval       : 0,
 226                 audioBuffer     : null,
 227                 bufferSource    : null,
 228             gainNode        : null,
 229             _onended        : null,
 230
 231                         'Constructor' : function( disatcher, url, option ){
 232                                 var i = 0,
 233                                         l = X_WebAudio_BUFFER_LIST.length,
 234                                         loader;
 235
 236                                 /*
 237                                  * http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 238                                  * 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。
 239                                  * 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。
 240                                  */
 241                                 if( X_UA[ 'Android' ] && X_UA[ 'Chrome' ] && !X_WebAudio_fpsFix ){
 242                                         X_Node_systemNode.create( 'div', { id : 'fps-slowdown-make-sound-noisy' } );
 243                                         X_WebAudio_fpsFix = true;
 244                                 };
 245
 246                                 for( ; i < l; ++i ){
 247                                         loader = X_WebAudio_BUFFER_LIST[ i ];
 248                                         if( loader.audioUrl === url ){
 249                                                 this.loader = loader;
 250                                                 loader.webAudioList.push( this );
 251                                                 break;
 252                                         };
 253                                 };
 254
 255                                 if( !this.loader ){
 256                                         this.loader = loader = X_WebAudio_BufferLoader( this, url );
 257                                 };
 258
 259                                 this.disatcher = disatcher || this;
 260                                 this.setState( option );
 261
 262                                 this[ 'listenOnce' ]( X_EVENT_KILL_INSTANCE, this.onKill );
 263
 264                                 if( loader.audioBuffer || loader.errorState ){
 265                                         this._onLoadBufferComplete();
 266                                 } else {
 267                                         loader[ 'listenOnce' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 268                                 };
 269                         },
 270
 271                         onKill : function(){
 272                                 this.loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete )
 273                                         .unregister( this );
 274
 275                                 delete this.audioBuffer;
 276
 277                                 this.playing      && this.actualPause();
 278                     this.bufferSource && this._sourceDispose();
 279
 280                     this._onended     && X_Closure_correct( this._onended );
 281
 282                     this.gainNode     && this.gainNode.disconnect();
 283                         },
 284                                 _onLoadBufferComplete : function( e ){
 285                                         var loader = this.loader,
 286                                                 buffer = loader.audioBuffer;
 287
 288                                         e && loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 289
 290                         if ( !buffer ) {
 291                                 this.error = loader.errorState;
 292
 293                             this.disatcher[ 'dispatch' ]({
 294                                                                 type    : X_EVENT_ERROR,
 295                                                                 error   : loader.errorState,
 296                                                                 message : loader.errorState === 1 ?
 297                                                                                         'load buffer network error' :
 298                                                                                         'buffer decode error'
 299                                                         });
 300                                                 this[ 'kill' ]();
 301                             return;
 302                         };
 303
 304                         this.audioBuffer = buffer;
 305                         this.duration    = buffer.duration * 1000;
 306
 307                                         this.disatcher[ 'asyncDispatch' ]( X_WebAudio_touchState ? X_EVENT_MEDIA_TOUCH_FOR_LOAD : X_EVENT_READY );
 308                                 },
 309
 310                         actualPlay : function(){
 311                                 var e, begin, end;
 312
 313                                 console.log( '[WebAudio] play abuf:' + !!this.audioBuffer );
 314
 315                     if( !this.audioBuffer ){
 316                         this._playReserved = true;
 317                         return;
 318                     };
 319
 320                                 if( X_WebAudio_touchState ){
 321                                         e = X_EventDispatcher_CURRENT_EVENTS[ X_EventDispatcher_CURRENT_EVENTS.length - 1 ];
 322                                         if( !e || !e[ 'pointerType' ] ){
 323                                                 // alert( 'タッチイベント以外での play! ' + ( e ? e.type : '' ) );
 324                                                 return;
 325                                         };
 326                                         // http://qiita.com/uupaa/items/e5856e3cb2a9fc8c5507
 327                                         // iOS9 + touchstart で呼んでいた場合、 X_ViewPort['listenOnce']('pointerup',this,this.actualPlay())
 328                                         this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );
 329                                 };
 330                                 X_WebAudio_touchState = false;
 331
 332                                 end   = X_Audio_getEndTime( this );
 333                                 begin = X_Audio_getStartTime( this, end, true );
 334
 335                                 console.log( '[WebAudio] play ' + begin + ' -> ' + end );
 336
 337                                 if( this.bufferSource ) this._sourceDispose();
 338                                 if( !this.gainNode ){
 339                                         this.gainNode = X_WebAudio_context[ 'createGain' ] ? X_WebAudio_context[ 'createGain' ]() : X_WebAudio_context[ 'createGainNode' ]();
 340                         this.gainNode[ 'connect' ]( X_WebAudio_context[ 'destination' ] );
 341                                 };
 342                     this.bufferSource        = X_WebAudio_context[ 'createBufferSource' ]();
 343                     this.bufferSource.buffer = this.audioBuffer;
 344                     this.bufferSource[ 'connect' ]( this.gainNode );
 345
 346                     this.gainNode[ 'gain' ].value = this.gain;
 347
 348                     // おかしい、stop 前に外していても呼ばれる、、、@Firefox33.1
 349                     // 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
 350                     // 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
 351                 //if( this.bufferSource.onended !== undefined ){
 352                         //console.log( '> use onended' );
 353                         //this.bufferSource.onended = this._onended || ( this._onended = X_Closure_create( this, this._onEnded ) );
 354                 //} else {
 355                         this._timerID && X_Timer_remove( this._timerID );
 356                                         this._timerID = X_Timer_once( end - begin, this, this._onEnded );
 357                 //};
 358
 359                     if( this.bufferSource.start ){
 360                         this.bufferSource.start( 0, begin / 1000, end / 1000 );
 361                     } else {
 362                         this.bufferSource[ 'noteGrainOn' ]( 0, begin / 1000, end / 1000 );
 363                     };
 364
 365                     this.playing      = true;
 366                     this._startPos    = begin;
 367                     this._endPosition = end;
 368                     this._startTime   = X_WebAudio_context.currentTime * 1000;
 369                     this._interval    = this._interval || X_Timer_add( 1000, 0, this, this._onInterval );
 370                         },
 371
 372                                 _sourceDispose : function(){
 373                             this.bufferSource.disconnect();
 374                             //delete this.bufferSource.onended;
 375                             delete this.bufferSource;
 376                         },
 377
 378                                 _onInterval : function(){
 379                                         if( !this.playing ){
 380                                                 delete this._interval;
 381                                                 return X_CALLBACK_UN_LISTEN;
 382                                         };
 383                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_PLAYING );
 384                                 },
 385
 386                                 _onEnded : function(){
 387                                         var time;
 388                                         delete this._timerID;
 389
 390                             if( this.playing ){
 391                                 time = X_WebAudio_context.currentTime * 1000 - this._startTime - this._endPosition + this._startPos | 0;
 392                                 //console.log( '> onEnd ' + ( this.playing && ( X_WebAudio_context.currentTime * 1000 - this._startTime ) ) + ' < ' + ( this._endPosition - this._startPos ) );
 393                                 if( this._onended ){
 394                                         // Firefox 用の対策,,,
 395                                         if( time < 0 ) return;
 396                                 } else {
 397                                         if( time < 0 ){
 398                                                 //console.log( '> onEnd crt:' + ( X_WebAudio_context.currentTime * 1000 ) + ' startTime:' + this._startTime +
 399                                                 //      ' from:' + this._startPos + ' to:' + this._endPosition );
 400                                                 this._timerID = X_Timer_once( -time, this, this._onEnded );
 401                                                 return;
 402                                         };
 403                                 };
 404
 405                                 if( this.autoLoop ){
 406                                         if( !( this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){
 407                                                 this.looped = true;
 408                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );
 409                                                 this.actualPlay();
 410                                         };
 411                                 } else {
 412                                         this.actualPause();
 413                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );
 414                                 };
 415                             };
 416                                 },
 417
 418                         actualPause : function(){
 419                                 console.log( '[WebAudio] pause' );
 420
 421                     this._timerID && X_Timer_remove( this._timerID );
 422                                 delete this._timerID;
 423                                 delete this.playing;
 424
 425                     if( this.bufferSource ){
 426                         //if( this.bufferSource.onended ) delete this.bufferSource.onended;
 427
 428                         this.bufferSource.stop ?
 429                                 this.bufferSource.stop( 0 ) : this.bufferSource[ 'noteOff' ]( 0 );
 430                     };
 431                         },
 432
 433                         getActualCurrentTime : function(){
 434                                 return X_WebAudio_context.currentTime * 1000 - this._startTime + this._startPos | 0;
 435                         },
 436
 437                         afterUpdateState : function( result ){
 438                                 if( result & 2 || result & 1 ){ // seek
 439                         this.actualPlay();
 440                                 } else
 441                                 if( result & 4 ){
 442                        this.gainNode[ 'gain' ].value = this.gain;
 443                                 };
 444                         }
 445
 446                 }
 447         );
 448
 449         X_Audio_BACKENDS.push(
 450                 {
 451                         backendID   : 1,
 452
 453                         backendName : 'WebAudio',
 454
 455                         canPlay     : X_Audio_codecs,
 456
 457                         detect      : function( proxy, source, ext ){
 458                                 proxy[ 'asyncDispatch' ]( { type : X_EVENT_COMPLETE, canPlay : X_Audio_codecs[ ext ] } );
 459                         },
 460
 461                         klass : X_WebAudio
 462                 }
 463         );
 464 };