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                                                                 !X_UA[ 'Blink' ] &&
  88                                                                 // Firefox40.0.5 + Windows8 で音声が途中から鳴らなくなる
  89                                                                 // Firefox41.0.1 + Windows8 で音声が途中から鳴らなくなる
  90                                                                 !( 40 <= X_UA[ 'Gecko' ] && X_UA[ 'Gecko' ] < 42 && X_UA[ 'Windows' ] ) &&
  91                                                                 ( window[ 'AudioContext' ] || window[ 'webkitAudioContext' ] ),
  92         X_WebAudio_BUFFER_LIST  = [],
  93         X_WebAudio_need1stTouch = X_UA[ 'iOS' ],
  94         X_WebAudio_touchState   = X_WebAudio_need1stTouch,
  95         X_WebAudio,
  96         X_WebAudio_BufferLoader,
  97         X_WebAudio_fpsFix;
  98
  99 /*
 100  * iPhone 4s 以下、iPad2以下、iPad mini 1以下, iPod touch 4G 以下は不可
 101  */
 102 if( X_WebAudio_context ){
 103
 104         X_WebAudio_context = new X_WebAudio_context;
 105
 106         X_WebAudio_BufferLoader = X_EventDispatcher[ 'inherits' ](
 107                 'X.WebAudio.BufferLoader',
 108                 X_Class.POOL_OBJECT,
 109                 {
 110                         audioUrl        : '',
 111             xhr             : null,
 112             onDecodeSuccess : null,
 113             onDecodeError   : null,
 114
 115             audioBuffer     : null,
 116             errorState      : 0,
 117             webAudioList    : null,
 118
 119                         'Constructor' : function( webAudio, url ){
 120                                 this.webAudioList = [ webAudio ];
 121                                 this.audioUrl     = url;
 122                                 this.xhr = X[ 'Net' ]( { 'xhr' : url, 'dataType' : 'arraybuffer' } )
 123                                                                         [ 'listen' ]( X_EVENT_PROGRESS, this )
 124                                                                         [ 'listenOnce' ]( [ X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 125                                 X_WebAudio_BUFFER_LIST.push( this );
 126                         },
 127
 128                         handleEvent : function( e ){
 129                                 var i, l;
 130
 131                                 switch( e.type ){
 132                                         case X_EVENT_PROGRESS :
 133                                                 for( i = 0, l = this.webAudioList.length; i < l; ++i ){
 134                                                         this.webAudioList[ i ][ 'dispatch' ]( { type : X_EVENT_PROGRESS, 'percent' : e[ 'percent' ] } );
 135                                                 };
 136                                                 return;
 137
 138                                         case X_EVENT_SUCCESS :
 139                                         // TODO 旧api
 140                                         // https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API/Porting_webkitAudioContext_code_to_standards_based_AudioContext
 141
 142                                         // http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 143                                         // 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
 144                                         // 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）。
 145                                         // ただし iOS 8.1.2 では エラーになる
 146                                                 if( X_UA[ 'iOS' ] < 8 || !X_WebAudio_context[ 'decodeAudioData' ] ){
 147                                                         this._onDecodeSuccess( X_WebAudio_context[ 'createBuffer' ]( e.response, false ) );
 148                                                 } else
 149                                                 if( X_WebAudio_context[ 'decodeAudioData' ] ){
 150                                                         X_WebAudio_context[ 'decodeAudioData' ]( e.response,
 151                                                                 this.onDecodeSuccess = X_Closure_create( this, this._onDecodeSuccess ),
 152                                                                 this.onDecodeError   = X_Closure_create( this, this._onDecodeError ) );
 153                                                 };
 154                                                 break;
 155
 156                                         case X_EVENT_COMPLETE :
 157                                                 this.errorState = 1;
 158                                                 this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 159                                                 break;
 160                                 };
 161                                 this.xhr[ 'unlisten' ]( [ X_EVENT_PROGRESS, X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 162                                 delete this.xhr;
 163                         },
 164
 165                                 _onDecodeSuccess : function( buffer ){
 166                                         this.onDecodeSuccess && this._onDecodeComplete();
 167
 168                         if ( !buffer ) {
 169                                 this.errorState = 2;
 170                             this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 171                             return;
 172                         };
 173
 174                         console.log( 'WebAudio decode success!' );
 175
 176                         this.audioBuffer = buffer;
 177
 178                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 179
 180                         console.log( 'WebAudio decoded!' );
 181                                 },
 182
 183                                 _onDecodeError : function(){
 184                                         console.log( 'WebAudio decode error!' );
 185                                         this._onDecodeComplete();
 186                                         this.errorState = 2;
 187                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 188                                 },
 189
 190                                 _onDecodeComplete : function(){
 191                                         X_Closure_correct( this.onDecodeSuccess );
 192                                         delete this.onDecodeSuccess;
 193                                         X_Closure_correct( this.onDecodeError );
 194                                         delete this.onDecodeError;
 195                                 },
 196
 197                         unregister : function( webAudio ){
 198                                 var list = this.webAudioList,
 199                                         i    = list.indexOf( webAudio );
 200                                 if( 0 < i ){
 201                                         list.splice( i, 1 );
 202                                         if( !list.length ){
 203                                                 this.xhr && this.xhr[ 'kill' ]();
 204                                                 this[ 'kill' ]();
 205                                         };
 206                                 };
 207                         }
 208
 209                 }
 210         );
 211
 212
 213         X_WebAudio = X_AudioBase[ 'inherits' ](
 214                 'X.WebAudio',
 215                 X_Class.POOL_OBJECT,
 216                 {
 217
 218                         loader          : null,
 219
 220                         _startPos       : 0,
 221                         _endPosition    : 0,
 222                         _startTime      : 0,
 223             _timerID        : 0,
 224             _interval       : 0,
 225                 audioBuffer     : null,
 226                 bufferSource    : null,
 227             gainNode        : null,
 228             _onended        : null,
 229
 230                         'Constructor' : function( disatcher, url, option ){
 231                                 var i = 0,
 232                                         l = X_WebAudio_BUFFER_LIST.length,
 233                                         loader;
 234
 235                                 /*
 236                                  * http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 237                                  * 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。
 238                                  * 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。
 239                                  */
 240                                 if( X_UA[ 'Android' ] && X_UA[ 'Chrome' ] && !X_WebAudio_fpsFix ){
 241                                         X_Node_systemNode.create( 'div', { id : 'fps-slowdown-make-sound-noisy' } );
 242                                         X_WebAudio_fpsFix = true;
 243                                 };
 244
 245                                 for( ; i < l; ++i ){
 246                                         loader = X_WebAudio_BUFFER_LIST[ i ];
 247                                         if( loader.audioUrl === url ){
 248                                                 this.loader = loader;
 249                                                 loader.webAudioList.push( this );
 250                                                 break;
 251                                         };
 252                                 };
 253
 254                                 if( !this.loader ){
 255                                         this.loader = loader = X_WebAudio_BufferLoader( this, url );
 256                                 };
 257
 258                                 this.disatcher = disatcher || this;
 259                                 this.setState( option );
 260
 261                                 this[ 'listenOnce' ]( X_EVENT_KILL_INSTANCE, this.onKill );
 262
 263                                 if( loader.audioBuffer || loader.errorState ){
 264                                         this._onLoadBufferComplete();
 265                                 } else {
 266                                         loader[ 'listenOnce' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 267                                 };
 268                         },
 269
 270                         onKill : function(){
 271                                 this.loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete )
 272                                         .unregister( this );
 273
 274                                 delete this.audioBuffer;
 275
 276                                 this.playing      && this.actualPause();
 277                     this.bufferSource && this._sourceDispose();
 278
 279                     this._onended     && X_Closure_correct( this._onended );
 280
 281                     this.gainNode     && this.gainNode.disconnect();
 282                         },
 283                                 _onLoadBufferComplete : function( e ){
 284                                         var loader = this.loader,
 285                                                 buffer = loader.audioBuffer;
 286
 287                                         e && loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 288
 289                         if ( !buffer ) {
 290                                 this.error = loader.errorState;
 291
 292                             this.disatcher[ 'dispatch' ]({
 293                                                                 type    : X_EVENT_ERROR,
 294                                                                 error   : loader.errorState,
 295                                                                 message : loader.errorState === 1 ?
 296                                                                                         'load buffer network error' :
 297                                                                                         'buffer decode error'
 298                                                         });
 299                                                 this[ 'kill' ]();
 300                             return;
 301                         };
 302
 303                         this.audioBuffer = buffer;
 304                         this.duration    = buffer.duration * 1000;
 305
 306                                         this.disatcher[ 'asyncDispatch' ]( X_WebAudio_touchState ? X_EVENT_MEDIA_TOUCH_FOR_LOAD : X_EVENT_READY );
 307                                 },
 308
 309                         actualPlay : function(){
 310                                 var e, begin, end;
 311
 312                                 console.log( '[WebAudio] play abuf:' + !!this.audioBuffer );
 313
 314                     if( !this.audioBuffer ){
 315                         this._playReserved = true;
 316                         return;
 317                     };
 318
 319                                 if( X_WebAudio_touchState ){
 320                                         e = X_EventDispatcher_CURRENT_EVENTS[ X_EventDispatcher_CURRENT_EVENTS.length - 1 ];
 321                                         if( !e || !e[ 'pointerType' ] ){
 322                                                 // alert( 'タッチイベント以外での play! ' + ( e ? e.type : '' ) );
 323                                                 return;
 324                                         };
 325                                         this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );
 326                                 };
 327                                 X_WebAudio_touchState = false;
 328
 329                                 end   = X_Audio_getEndTime( this );
 330                                 begin = X_Audio_getStartTime( this, end, true );
 331
 332                                 console.log( '[WebAudio] play ' + begin + ' -> ' + end );
 333
 334                                 if( this.bufferSource ) this._sourceDispose();
 335                                 if( !this.gainNode ){
 336                                         this.gainNode = X_WebAudio_context[ 'createGain' ] ? X_WebAudio_context[ 'createGain' ]() : X_WebAudio_context[ 'createGainNode' ]();
 337                         this.gainNode[ 'connect' ]( X_WebAudio_context[ 'destination' ] );
 338                                 };
 339                     this.bufferSource        = X_WebAudio_context[ 'createBufferSource' ]();
 340                     this.bufferSource.buffer = this.audioBuffer;
 341                     this.bufferSource[ 'connect' ]( this.gainNode );
 342
 343                     this.gainNode[ 'gain' ].value = this.gain;
 344
 345                     // おかしい、stop 前に外していても呼ばれる、、、@Firefox33.1
 346                     // 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
 347                     // 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
 348                 //if( this.bufferSource.onended !== undefined ){
 349                         //console.log( '> use onended' );
 350                         //this.bufferSource.onended = this._onended || ( this._onended = X_Closure_create( this, this._onEnded ) );
 351                 //} else {
 352                         this._timerID && X_Timer_remove( this._timerID );
 353                                         this._timerID = X_Timer_once( end - begin, this, this._onEnded );
 354                 //};
 355
 356                     if( this.bufferSource.start ){
 357                         this.bufferSource.start( 0, begin / 1000, end / 1000 );
 358                     } else {
 359                         this.bufferSource[ 'noteGrainOn' ]( 0, begin / 1000, end / 1000 );
 360                     };
 361
 362                     this.playing      = true;
 363                     this._startPos    = begin;
 364                     this._endPosition = end;
 365                     this._startTime   = X_WebAudio_context.currentTime * 1000;
 366                     this._interval    = this._interval || X_Timer_add( 1000, 0, this, this._onInterval );
 367                         },
 368
 369                                 _sourceDispose : function(){
 370                             this.bufferSource.disconnect();
 371                             delete this.bufferSource.onended;
 372                             delete this.bufferSource;
 373                         },
 374
 375                                 _onInterval : function(){
 376                                         if( !this.playing ){
 377                                                 delete this._interval;
 378                                                 return X_CALLBACK_UN_LISTEN;
 379                                         };
 380                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_PLAYING );
 381                                 },
 382
 383                                 _onEnded : function(){
 384                                         var time;
 385                                         delete this._timerID;
 386
 387                             if( this.playing ){
 388                                 time = X_WebAudio_context.currentTime * 1000 - this._startTime - this._endPosition + this._startPos | 0;
 389                                 //console.log( '> onEnd ' + ( this.playing && ( X_WebAudio_context.currentTime * 1000 - this._startTime ) ) + ' < ' + ( this._endPosition - this._startPos ) );
 390                                 if( this._onended ){
 391                                         // Firefox 用の対策,,,
 392                                         if( time < 0 ) return;
 393                                 } else {
 394                                         if( time < 0 ){
 395                                                 //console.log( '> onEnd crt:' + ( X_WebAudio_context.currentTime * 1000 ) + ' startTime:' + this._startTime +
 396                                                 //      ' from:' + this._startPos + ' to:' + this._endPosition );
 397                                                 this._timerID = X_Timer_once( -time, this, this._onEnded );
 398                                                 return;
 399                                         };
 400                                 };
 401
 402                                 if( this.autoLoop ){
 403                                         if( !( this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){
 404                                                 this.looped = true;
 405                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );
 406                                                 this.actualPlay();
 407                                         };
 408                                 } else {
 409                                         this.actualPause();
 410                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );
 411                                 };
 412                             };
 413                                 },
 414
 415                         actualPause : function(){
 416                                 console.log( '[WebAudio] pause' );
 417
 418                     this._timerID && X_Timer_remove( this._timerID );
 419                                 delete this._timerID;
 420                                 delete this.playing;
 421
 422                     if( this.bufferSource ){
 423                         if( this.bufferSource.onended ) delete this.bufferSource.onended;
 424
 425                         this.bufferSource.stop ?
 426                                 this.bufferSource.stop( 0 ) : this.bufferSource[ 'noteOff' ]( 0 );
 427                     };
 428                         },
 429
 430                         getActualCurrentTime : function(){
 431                                 return X_WebAudio_context.currentTime * 1000 - this._startTime + this._startPos | 0;
 432                         },
 433
 434                         afterUpdateState : function( result ){
 435                                 if( result & 2 || result & 1 ){ // seek
 436                         this.actualPlay();
 437                                 } else
 438                                 if( result & 4 ){
 439                        this.gainNode[ 'gain' ].value = this.gain;
 440                                 };
 441                         }
 442
 443                 }
 444         );
 445
 446         X_Audio_BACKENDS.push(
 447                 {
 448                         backendID   : 1,
 449
 450                         backendName : 'WebAudio',
 451
 452                         canPlay     : X_Audio_codecs,
 453
 454                         detect      : function( proxy, source, ext ){
 455                                 proxy[ 'asyncDispatch' ]( { type : X_EVENT_COMPLETE, canPlay : X_Audio_codecs[ ext ] } );
 456                         },
 457
 458                         klass : X_WebAudio
 459                 }
 460         );
 461 };