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 = !X_UA[ 'iPhone_4s' ]  && !X_UA[ 'iPad_2Mini1' ]  && !X_UA[ 'iPod_4' ]  &&
  82                                                                 // TODO なんで fennec を禁止?
  83                                                                 !( X_UA[ 'Gecko' ] && X_UA[ 'Android' ] ) &&
  84                                                                 // Firefox40.0.5 + Windows8 で音声が途中から鳴らなくなる
  85                                                                 // Firefox41.0.1 + Windows8 で音声が途中から鳴らなくなる
  86                                                                 !( 40 <= X_UA[ 'Gecko' ] && X_UA[ 'Gecko' ] < 42 && X_UA[ 'Windows' ] ) &&
  87                                                                 ( window[ 'AudioContext' ] || window[ 'webkitAudioContext' ] ),
  88         X_WebAudio_BUFFER_LIST      = [],
  89         X_WebAudio,
  90         X_WebAudio_BufferLoader,
  91         X_WebAudio_fpsFix;
  92
  93 /*
  94  * iPhone 4s 以下、iPad2以下、iPad mini 1以下, iPod touch 4G 以下は不可
  95  */
  96 if( X_WebAudio_context ){
  97
  98         X_WebAudio_context = new X_WebAudio_context;
  99
 100         X_WebAudio_BufferLoader = X_EventDispatcher[ 'inherits' ](
 101                 'X.WebAudio.BufferLoader',
 102                 X_Class.POOL_OBJECT,
 103                 {
 104                         audioUrl        : '',
 105             xhr             : null,
 106             onDecodeSuccess : null,
 107             onDecodeError   : null,
 108
 109             audioBuffer     : null,
 110             errorState      : 0,
 111             webAudioList    : null,
 112
 113                         'Constructor' : function( webAudio, url ){
 114                                 this.webAudioList = [ webAudio ];
 115                                 this.audioUrl     = url;
 116                                 this.xhr = X[ 'Net' ]( { 'xhr' : url, 'dataType' : 'arraybuffer' } )
 117                                                                         [ 'listen' ]( X_EVENT_PROGRESS, this )
 118                                                                         [ 'listenOnce' ]( [ X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 119                                 X_WebAudio_BUFFER_LIST.push( this );
 120                         },
 121
 122                         handleEvent : function( e ){
 123                                 switch( e.type ){
 124                                         case X_EVENT_PROGRESS :
 125                                                 this[ 'dispatch' ]( { type : 'progress', 'percent' : e[ 'percent' ] } );
 126                                                 return;
 127
 128                                         case X_EVENT_SUCCESS :
 129                                         // TODO 旧api
 130                                         // https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API/Porting_webkitAudioContext_code_to_standards_based_AudioContext
 131
 132                                         // http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 133                                         // 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
 134                                         // 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）。
 135                                         // ただし iOS 8.1.2 では エラーになる
 136                                                 if( X_UA[ 'iOS' ] < 8 || !X_WebAudio_context[ 'decodeAudioData' ] ){
 137                                                         this._onDecodeSuccess( X_WebAudio_context[ 'createBuffer' ]( e.response, false ) );
 138                                                 } else
 139                                                 if( X_WebAudio_context[ 'decodeAudioData' ] ){
 140                                                         X_WebAudio_context[ 'decodeAudioData' ]( e.response,
 141                                                                 this.onDecodeSuccess = X_Closure_create( this, this._onDecodeSuccess ),
 142                                                                 this.onDecodeError   = X_Closure_create( this, this._onDecodeError ) );
 143                                                 };
 144                                                 break;
 145
 146                                         case X_EVENT_COMPLETE :
 147                                                 this.errorState = 1;
 148                                                 this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 149                                                 break;
 150                                 };
 151                                 this.xhr[ 'unlisten' ]( [ X_EVENT_PROGRESS, X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 152                                 delete this.xhr;
 153                         },
 154
 155                                 _onDecodeSuccess : function( buffer ){
 156                                         this.onDecodeSuccess && this._onDecodeComplete();
 157
 158                         if ( !buffer ) {
 159                                 this.errorState = 2;
 160                             this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 161                             return;
 162                         };
 163
 164                         console.log( 'WebAudio decode success!' );
 165
 166                         this.audioBuffer = buffer;
 167
 168                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 169
 170                         console.log( 'WebAudio decoded!' );
 171                                 },
 172
 173                                 _onDecodeError : function(){
 174                                         console.log( 'WebAudio decode error!' );
 175                                         this._onDecodeComplete();
 176                                         this.errorState = 2;
 177                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 178                                 },
 179
 180                                 _onDecodeComplete : function(){
 181                                         X_Closure_correct( this.onDecodeSuccess );
 182                                         delete this.onDecodeSuccess;
 183                                         X_Closure_correct( this.onDecodeError );
 184                                         delete this.onDecodeError;
 185                                 },
 186
 187                         unregister : function( webAudio ){
 188                                 var list = this.webAudioList,
 189                                         i    = list.indexOf( webAudio );
 190                                 if( 0 < i ){
 191                                         list.splice( i, 1 );
 192                                         if( list.length ){
 193                                                 this.xhr && this.xhr[ 'kill' ]();
 194                                                 this[ 'kill' ]();
 195                                         };
 196                                 };
 197                         }
 198
 199                 }
 200         );
 201
 202
 203         X_WebAudio = X_AudioBase[ 'inherits' ](
 204                 'X.WebAudio',
 205                 X_Class.POOL_OBJECT,
 206                 {
 207
 208                         loader          : null,
 209
 210                         _startPos       : 0,
 211                         _endPosition    : 0,
 212                         _startTime      : 0,
 213             _timerID        : 0,
 214             _interval       : 0,
 215                 audioBuffer     : null,
 216                 bufferSource    : null,
 217             gainNode        : null,
 218             _onended        : null,
 219
 220                         'Constructor' : function( disatcher, url, option ){
 221                                 var i = 0,
 222                                         l = X_WebAudio_BUFFER_LIST.length,
 223                                         loader;
 224
 225                                 /*
 226                                  * http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 227                                  * 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。
 228                                  * 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。
 229                                  */
 230                                 if( X_UA[ 'Android' ] && X_UA[ 'Chrome' ] && !X_WebAudio_fpsFix ){
 231                                         X_Node_systemNode.create( 'div', { id : 'fps-slowdown-make-sound-noisy' } );
 232                                         X_WebAudio_fpsFix = true;
 233                                 };
 234
 235                                 for( ; i < l; ++i ){
 236                                         loader = X_WebAudio_BUFFER_LIST[ i ];
 237                                         if( loader.audioUrl === url ){
 238                                                 this.loader = loader;
 239                                                 loader.webAudioList.push( this );
 240                                                 break;
 241                                         };
 242                                 };
 243
 244                                 if( !this.loader ){
 245                                         this.loader = loader = X_WebAudio_BufferLoader( this, url );
 246                                 };
 247
 248                                 this.disatcher = disatcher || this;
 249                                 this.setState( option );
 250
 251                                 this[ 'listenOnce' ]( X_EVENT_KILL_INSTANCE, this.onKill );
 252
 253                                 if( loader.audioBuffer || loader.errorState ){
 254                                         this._onLoadBufferComplete();
 255                                 } else {
 256                                         loader[ 'listenOnce' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 257                                 };
 258                         },
 259
 260                         onKill : function(){
 261                                 this.loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete )
 262                                         .unregister( this );
 263
 264                                 delete this.audioBuffer;
 265
 266                                 this.playing      && this.actualPause();
 267                     this.bufferSource && this._sourceDispose();
 268
 269                     this._onended     && X_Closure_correct( this._onended );
 270
 271                     this.gainNode     && this.gainNode.disconnect();
 272                         },
 273                                 _onLoadBufferComplete : function( e ){
 274                                         var loader = this.loader,
 275                                                 buffer = loader.audioBuffer;
 276
 277                                         e && loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 278
 279                         if ( !buffer ) {
 280                                 this.error = loader.errorState;
 281
 282                             this.disatcher[ 'dispatch' ]({
 283                                                                 type    : X_EVENT_ERROR,
 284                                                                 error   : loader.errorState,
 285                                                                 message : loader.errorState === 1 ?
 286                                                                                         'load buffer network error' :
 287                                                                                         'buffer decode error'
 288                                                         });
 289                                                 this[ 'kill' ]();
 290                             return;
 291                         };
 292
 293                         this.audioBuffer = buffer;
 294                         this.duration    = buffer.duration * 1000;
 295
 296                                         this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );
 297
 298                         console.log( 'WebAudio buffer ready' );
 299
 300                         this.autoplay && X_Timer_once( 16, this, this.play );
 301
 302                                 },
 303
 304                         actualPlay : function(){
 305                                 var begin, end;
 306
 307                                 console.log( '[WebAudio] play abuf:' + !!this.audioBuffe );
 308
 309                     if( !this.audioBuffer ){
 310                         this.autoplay = true;
 311                         return;
 312                     };
 313
 314                                 end   = X_Audio_getEndTime( this );
 315                                 begin = X_Audio_getStartTime( this, end, true );
 316
 317                                 console.log( '[WebAudio] play ' + begin + ' -> ' + end );
 318
 319                                 if( this.bufferSource ) this._sourceDispose();
 320                                 if( !this.gainNode ){
 321                                         this.gainNode = X_WebAudio_context[ 'createGain' ] ? X_WebAudio_context[ 'createGain' ]() : X_WebAudio_context[ 'createGainNode' ]();
 322                         this.gainNode[ 'connect' ]( X_WebAudio_context[ 'destination' ] );
 323                                 };
 324                     this.bufferSource        = X_WebAudio_context[ 'createBufferSource' ]();
 325                     this.bufferSource.buffer = this.audioBuffer;
 326                     this.bufferSource[ 'connect' ]( this.gainNode );
 327
 328                     this.gainNode[ 'gain' ].value = this.gain;
 329
 330                     // おかしい、stop 前に外していても呼ばれる、、、@Firefox33.1
 331                     // 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
 332                     // 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
 333                 //if( this.bufferSource.onended !== undefined ){
 334                         //console.log( '> use onended' );
 335                         //this.bufferSource.onended = this._onended || ( this._onended = X_Closure_create( this, this._onEnded ) );
 336                 //} else {
 337                         this._timerID && X_Timer_remove( this._timerID );
 338                                         this._timerID = X_Timer_once( end - begin, this, this._onEnded );
 339                 //};
 340
 341                     if( this.bufferSource.start ){
 342                         this.bufferSource.start( 0, begin / 1000, end / 1000 );
 343                     } else {
 344                         this.bufferSource[ 'noteGrainOn' ]( 0, begin / 1000, end / 1000 );
 345                     };
 346
 347                     this.playing      = true;
 348                     this._startPos    = begin;
 349                     this._endPosition = end;
 350                     this._startTime   = X_WebAudio_context.currentTime * 1000;
 351                     this._interval    = this._interval || X_Timer_add( 1000, 0, this, this._onInterval );
 352                         },
 353
 354                                 _sourceDispose : function(){
 355                             this.bufferSource.disconnect();
 356                             delete this.bufferSource.onended;
 357                             delete this.bufferSource;
 358                         },
 359
 360                                 _onInterval : function(){
 361                                         if( !this.playing ){
 362                                                 delete this._interval;
 363                                                 return X_CALLBACK_UN_LISTEN;
 364                                         };
 365                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_PLAYING );
 366                                 },
 367
 368                                 _onEnded : function(){
 369                                         var time;
 370                                         delete this._timerID;
 371
 372                             if( this.playing ){
 373                                 time = X_WebAudio_context.currentTime * 1000 - this._startTime - this._endPosition + this._startPos | 0;
 374                                 //console.log( '> onEnd ' + ( this.playing && ( X_WebAudio_context.currentTime * 1000 - this._startTime ) ) + ' < ' + ( this._endPosition - this._startPos ) );
 375                                 if( this._onended ){
 376                                         // Firefox 用の対策,,,
 377                                         if( time < 0 ) return;
 378                                 } else {
 379                                         if( time < 0 ){
 380                                                 //console.log( '> onEnd crt:' + ( X_WebAudio_context.currentTime * 1000 ) + ' startTime:' + this._startTime +
 381                                                 //      ' from:' + this._startPos + ' to:' + this._endPosition );
 382                                                 this._timerID = X_Timer_once( -time, this, this._onEnded );
 383                                                 return;
 384                                         };
 385                                 };
 386
 387                                 if( this.autoLoop ){
 388                                         if( !( this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){
 389                                                 this.looped = true;
 390                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );
 391                                                 this.actualPlay();
 392                                         };
 393                                 } else {
 394                                         this.actualPause();
 395                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );
 396                                 };
 397                             };
 398                                 },
 399
 400                         actualPause : function(){
 401                                 //if( !this.playing ) return this;
 402
 403                                 console.log( '[WebAudio] pause' );
 404
 405                                 this.seekTime = this.getActualCurrentTime();
 406
 407                     this._timerID && X_Timer_remove( this._timerID );
 408                                 delete this._timerID;
 409                                 delete this.playing;
 410
 411                     if( this.bufferSource ){
 412                         if( this.bufferSource.onended ) delete this.bufferSource.onended;
 413
 414                         this.bufferSource.stop ?
 415                                 this.bufferSource.stop( 0 ) : this.bufferSource[ 'noteOff' ]( 0 );
 416                     };
 417                         },
 418
 419                         getActualCurrentTime : function(){
 420                                 return X_WebAudio_context.currentTime * 1000 - this._startTime + this._startPos | 0;
 421                         },
 422
 423                         afterUpdateState : function( result ){
 424                                 if( result & 2 || result & 1 ){ // seek
 425                         this.actualPlay();
 426                                 } else
 427                                 if( result & 4 ){
 428                        this.gainNode[ 'gain' ].value = this.gain;
 429                                 };
 430                         }
 431
 432                 }
 433         );
 434
 435         X_Audio_BACKENDS.push(
 436                 {
 437                         backendID   : 1,
 438
 439                         backendName : 'WebAudio',
 440
 441                         canPlay     : X_Audio_codecs,
 442
 443                         detect      : function( proxy, source, ext ){
 444                                 proxy[ 'asyncDispatch' ]( { type : X_EVENT_COMPLETE, canPlay : X_Audio_codecs[ ext ] } );
 445                         },
 446
 447                         klass : X_WebAudio
 448                 }
 449         );
 450 };