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                                                                 // iOS7 以上で HTML Audio が鳴らない問題を見ていくよ
  84                                                                 // !X_UA[ 'iOS' ] &&
  85                                                                 // Android2 + Gecko で WebAudio が極めて不安定
  86                                                                 !( X_UA[ 'Fennec' ] && X_UA[ 'Android' ] < 3 ) &&
  87                                                                 // 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
  88                                                                 !X_UA[ 'AOSP' ] && !( X_UA[ 'ChromeWV' ] < 5 ) &&
  89                                                                 // Blink HTMLAudio 調査用
  90                                                                 //!X_UA[ 'Blink' ] &&
  91                                                                 // Firefox40.0.5 + Windows8 で音声が途中から鳴らなくなる
  92                                                                 // Firefox41.0.1 + Windows8 で音声が途中から鳴らなくなる
  93                                                                 !( 40 <= X_UA[ 'Gecko' ] && X_UA[ 'Gecko' ] < 44 && X_UA[ 'Windows' ] ) &&
  94                                                                 ( window[ 'AudioContext' ] || window[ 'webkitAudioContext' ] ),
  95         X_WebAudio_BUFFER_LIST  = [],
  96         X_WebAudio_need1stTouch = X_UA[ 'iOS' ],
  97         X_WebAudio_touchState   = X_WebAudio_need1stTouch,
  98         X_WebAudio,
  99         X_WebAudio_BufferLoader,
 100         X_WebAudio_fpsFix;
 101
 102 /*
 103  * iPhone 4s 以下、iPad2以下、iPad mini 1以下, iPod touch 4G 以下は不可
 104  */
 105 if( X_WebAudio_context ){
 106
 107         X_WebAudio_context = new X_WebAudio_context;
 108
 109         X_WebAudio_BufferLoader = X_EventDispatcher[ 'inherits' ](
 110                 'X.WebAudio.BufferLoader',
 111                 X_Class.POOL_OBJECT,
 112                 {
 113                         audioUrl        : '',
 114             xhr             : null,
 115             onDecodeSuccess : null,
 116             onDecodeError   : null,
 117
 118             audioBuffer     : null,
 119             errorState      : 0,
 120             webAudioList    : null,
 121
 122                         'Constructor' : function( webAudio, url ){
 123                                 this.webAudioList = [ webAudio ];
 124                                 this.audioUrl     = url;
 125                                 this.xhr = X[ 'Net' ]( { 'xhr' : url, 'dataType' : 'arraybuffer' } )
 126                                                                         [ 'listen' ]( X_EVENT_PROGRESS, this )
 127                                                                         [ 'listenOnce' ]( [ X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 128                                 X_WebAudio_BUFFER_LIST.push( this );
 129                         },
 130
 131                         handleEvent : function( e ){
 132                                 var i, l;
 133
 134                                 switch( e.type ){
 135                                         case X_EVENT_PROGRESS :
 136                                                 for( i = 0, l = this.webAudioList.length; i < l; ++i ){
 137                                                         this.webAudioList[ i ][ 'dispatch' ]( { type : X_EVENT_PROGRESS, 'percent' : e[ 'percent' ] } );
 138                                                 };
 139                                                 return;
 140
 141                                         case X_EVENT_SUCCESS :
 142                                         // TODO 旧api
 143                                         // https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API/Porting_webkitAudioContext_code_to_standards_based_AudioContext
 144
 145                                         // http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 146                                         // 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
 147                                         // 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）。
 148                                         // ただし iOS 8.1.2 では エラーになる
 149                                                 if( X_UA[ 'iOS' ] < 8 || !X_WebAudio_context[ 'decodeAudioData' ] ){
 150                                                         this._onDecodeSuccess( X_WebAudio_context[ 'createBuffer' ]( e.response, false ) );
 151                                                 } else
 152                                                 if( X_WebAudio_context[ 'decodeAudioData' ] ){
 153                                                         X_WebAudio_context[ 'decodeAudioData' ]( e.response,
 154                                                                 this.onDecodeSuccess = X_Closure_create( this, this._onDecodeSuccess ),
 155                                                                 this.onDecodeError   = X_Closure_create( this, this._onDecodeError ) );
 156                                                 };
 157                                                 break;
 158
 159                                         case X_EVENT_COMPLETE :
 160                                                 this.errorState = 1;
 161                                                 this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 162                                                 break;
 163                                 };
 164                                 this.xhr[ 'unlisten' ]( [ X_EVENT_PROGRESS, X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 165                                 delete this.xhr;
 166                         },
 167
 168                                 _onDecodeSuccess : function( buffer ){
 169                                         this.onDecodeSuccess && this._onDecodeComplete();
 170
 171                         if( !buffer ){
 172                                 this.errorState = 2;
 173                             this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 174                             return;
 175                         };
 176
 177                         console.log( 'WebAudio decode success!' );
 178
 179                         this.audioBuffer = buffer;
 180
 181                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 182
 183                         console.log( 'WebAudio decoded!' );
 184                                 },
 185
 186                                 _onDecodeError : function(){
 187                                         console.log( 'WebAudio decode error!' );
 188                                         this._onDecodeComplete();
 189                                         this.errorState = 2;
 190                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 191                                 },
 192
 193                                 _onDecodeComplete : function(){
 194                                         X_Closure_correct( this.onDecodeSuccess );
 195                                         delete this.onDecodeSuccess;
 196                                         X_Closure_correct( this.onDecodeError );
 197                                         delete this.onDecodeError;
 198                                 },
 199
 200                         unregister : function( webAudio ){
 201                                 var list = this.webAudioList,
 202                                         i    = list.indexOf( webAudio );
 203
 204                                 if( 0 < i ){
 205                                         list.splice( i, 1 );
 206                                         if( !list.length ){
 207                                                 this.xhr && this.xhr[ 'kill' ]();
 208                                                 this[ 'kill' ]();
 209                                         };
 210                                 };
 211                         }
 212
 213                 }
 214         );
 215
 216
 217         X_WebAudio = X_AudioBase[ 'inherits' ](
 218                 'X.WebAudio',
 219                 X_Class.POOL_OBJECT,
 220                 {
 221
 222                         loader          : null,
 223
 224                         _startPos       : 0,
 225                         _endPosition    : 0,
 226                         _startTime      : 0,
 227             _timerID        : 0,
 228             _interval       : 0,
 229                 audioBuffer     : null,
 230                 bufferSource    : null,
 231             gainNode        : null,
 232             _onended        : null,
 233
 234                         'Constructor' : function( disatcher, url, option ){
 235                                 var i = 0,
 236                                         l = X_WebAudio_BUFFER_LIST.length,
 237                                         loader;
 238
 239                                 /*
 240                                  * http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 241                                  * 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。
 242                                  * 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。
 243                                  */
 244                                 if( X_UA[ 'Android' ] && X_UA[ 'Chrome' ] && !X_WebAudio_fpsFix ){
 245                                         X_Node_systemNode.create( 'div', { id : 'fps-slowdown-make-sound-noisy' } );
 246                                         X_WebAudio_fpsFix = true;
 247                                 };
 248
 249                                 for( ; i < l; ++i ){
 250                                         loader = X_WebAudio_BUFFER_LIST[ i ];
 251                                         if( loader.audioUrl === url ){
 252                                                 this.loader = loader;
 253                                                 loader.webAudioList.push( this );
 254                                                 break;
 255                                         };
 256                                 };
 257
 258                                 if( !this.loader ){
 259                                         this.loader = loader = X_WebAudio_BufferLoader( this, url );
 260                                 };
 261
 262                                 this.disatcher = disatcher || this;
 263                                 this.setState( option );
 264
 265                                 this[ 'listenOnce' ]( X_EVENT_KILL_INSTANCE, this.onKill );
 266
 267                                 if( loader.audioBuffer || loader.errorState ){
 268                                         this._onLoadBufferComplete();
 269                                 } else {
 270                                         loader[ 'listenOnce' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 271                                 };
 272                         },
 273
 274                         onKill : function(){
 275                                 this.loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete )
 276                                         .unregister( this );
 277
 278                                 delete this.audioBuffer;
 279
 280                                 this.playing      && this.actualPause();
 281                     this.bufferSource && this._sourceDispose();
 282
 283                     this._onended     && X_Closure_correct( this._onended );
 284
 285                     this.gainNode     && this.gainNode.disconnect();
 286                         },
 287                                 _onLoadBufferComplete : function( e ){
 288                                         var loader = this.loader,
 289                                                 buffer = loader.audioBuffer;
 290
 291                                         e && loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 292
 293                         if ( !buffer ) {
 294                                 this.error = loader.errorState;
 295                             this.disatcher[ 'dispatch' ]({
 296                                                                 type    : X_EVENT_ERROR,
 297                                                                 error   : loader.errorState,
 298                                                                 message : loader.errorState === 1 ?
 299                                                                                         'load buffer network error' :
 300                                                                                         'buffer decode error'
 301                                                         });
 302                                                 this[ 'kill' ]();
 303                             return;
 304                         };
 305
 306                         this.audioBuffer = buffer;
 307                         this.duration    = buffer.duration * 1000;
 308
 309                                         this.disatcher[ 'asyncDispatch' ]( X_WebAudio_touchState ? X_EVENT_MEDIA_TOUCH_FOR_LOAD : X_EVENT_READY );
 310                                 },
 311
 312                         actualPlay : function(){
 313                                 var e, begin, end;
 314
 315                                 console.log( '[WebAudio] play abuf:' + !!this.audioBuffer );
 316
 317                     if( !this.audioBuffer ){
 318                         this._playReserved = true;
 319                         return;
 320                     };
 321
 322                                 if( X_WebAudio_touchState ){
 323                                         e = X_EventDispatcher_CURRENT_EVENTS[ X_EventDispatcher_CURRENT_EVENTS.length - 1 ];
 324                                         if( !e || !e[ 'pointerType' ] ){
 325                                                 // alert( 'タッチイベント以外での play! ' + ( e ? e.type : '' ) );
 326                                                 return;
 327                                         };
 328                                         // http://qiita.com/uupaa/items/e5856e3cb2a9fc8c5507
 329                                         // iOS9 + touchstart で呼んでいた場合、 X_ViewPort['listenOnce']('pointerup',this,this.actualPlay())
 330                                         this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );
 331                                 };
 332                                 X_WebAudio_touchState = false;
 333
 334                                 end   = X_Audio_getEndTime( this );
 335                                 begin = X_Audio_getStartTime( this, end, true );
 336
 337                                 console.log( '[WebAudio] play ' + begin + ' -> ' + end );
 338
 339                                 if( this.bufferSource ) this._sourceDispose();
 340                                 if( !this.gainNode ){
 341                                         this.gainNode = X_WebAudio_context[ 'createGain' ] ? X_WebAudio_context[ 'createGain' ]() : X_WebAudio_context[ 'createGainNode' ]();
 342                         this.gainNode[ 'connect' ]( X_WebAudio_context[ 'destination' ] );
 343                                 };
 344                     this.bufferSource        = X_WebAudio_context[ 'createBufferSource' ]();
 345                     this.bufferSource.buffer = this.audioBuffer;
 346                     this.bufferSource[ 'connect' ]( this.gainNode );
 347
 348                     this.gainNode[ 'gain' ].value = this.gain;
 349
 350                     // おかしい、stop 前に外していても呼ばれる、、、@Firefox33.1
 351                     // 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
 352                     // 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
 353                 //if( this.bufferSource.onended !== undefined ){
 354                         //console.log( '> use onended' );
 355                         //this.bufferSource.onended = this._onended || ( this._onended = X_Closure_create( this, this._onEnded ) );
 356                 //} else {
 357                         this._timerID && X_Timer_remove( this._timerID );
 358                                         this._timerID = X_Timer_once( end - begin, this, this._onEnded );
 359                 //};
 360
 361                     if( this.bufferSource.start ){
 362                         this.bufferSource.start( 0, begin / 1000, end / 1000 );
 363                     } else {
 364                         this.bufferSource[ 'noteGrainOn' ]( 0, begin / 1000, end / 1000 );
 365                     };
 366
 367                     this.playing      = true;
 368                     this._startPos    = begin;
 369                     this._endPosition = end;
 370                     this._startTime   = X_WebAudio_context.currentTime * 1000;
 371                     this._interval    = this._interval || X_Timer_add( 1000, 0, this, this._onInterval );
 372                         },
 373
 374                                 _sourceDispose : function(){
 375                             this.bufferSource.disconnect();
 376                             //delete this.bufferSource.onended;
 377                             delete this.bufferSource;
 378                         },
 379
 380                                 _onInterval : function(){
 381                                         if( !this.playing ){
 382                                                 delete this._interval;
 383                                                 return X_CALLBACK_UN_LISTEN;
 384                                         };
 385                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_PLAYING );
 386                                 },
 387
 388                                 _onEnded : function(){
 389                                         var time;
 390                                         delete this._timerID;
 391
 392                             if( this.playing ){
 393                                 time = X_WebAudio_context.currentTime * 1000 - this._startTime - this._endPosition + this._startPos | 0;
 394                                 //console.log( '> onEnd ' + ( this.playing && ( X_WebAudio_context.currentTime * 1000 - this._startTime ) ) + ' < ' + ( this._endPosition - this._startPos ) );
 395                                 if( this._onended ){
 396                                         // Firefox 用の対策,,,
 397                                         if( time < 0 ) return;
 398                                 } else {
 399                                         if( time < 0 ){
 400                                                 //console.log( '> onEnd crt:' + ( X_WebAudio_context.currentTime * 1000 ) + ' startTime:' + this._startTime +
 401                                                 //      ' from:' + this._startPos + ' to:' + this._endPosition );
 402                                                 this._timerID = X_Timer_once( -time, this, this._onEnded );
 403                                                 return;
 404                                         };
 405                                 };
 406
 407                                 if( this.autoLoop ){
 408                                         if( !( this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){
 409                                                 this.looped = true;
 410                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );
 411                                                 this.actualPlay();
 412                                         };
 413                                 } else {
 414                                         this.actualPause();
 415                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );
 416                                 };
 417                             };
 418                                 },
 419
 420                         actualPause : function(){
 421                                 console.log( '[WebAudio] pause' );
 422
 423                     this._timerID && X_Timer_remove( this._timerID );
 424                                 delete this._timerID;
 425                                 delete this.playing;
 426
 427                     if( this.bufferSource ){
 428                         //if( this.bufferSource.onended ) delete this.bufferSource.onended;
 429
 430                         this.bufferSource.stop ?
 431                                 this.bufferSource.stop( 0 ) : this.bufferSource[ 'noteOff' ]( 0 );
 432                     };
 433                         },
 434
 435                         getActualCurrentTime : function(){
 436                                 return X_WebAudio_context.currentTime * 1000 - this._startTime + this._startPos | 0;
 437                         },
 438
 439                         afterUpdateState : function( result ){
 440                                 if( result & 2 || result & 1 ){ // seek
 441                         this.actualPlay();
 442                                 } else
 443                                 if( result & 4 ){
 444                        this.gainNode[ 'gain' ].value = this.gain;
 445                                 };
 446                         }
 447
 448                 }
 449         );
 450
 451         X_Audio_BACKENDS.push(
 452                 {
 453                         backendID   : 1,
 454
 455                         backendName : 'WebAudio',
 456
 457                         canPlay     : X_Audio_codecs,
 458
 459                         detect      : function( proxy, source, ext ){
 460                                 proxy[ 'asyncDispatch' ]( { type : X_EVENT_COMPLETE, canPlay : X_Audio_codecs[ ext ] } );
 461                         },
 462
 463                         klass : X_WebAudio
 464                 }
 465         );
 466 };