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                                                                 // Firefox40.0.5 + Windows8 で音声が途中から鳴らなくなる
  86                                                                 // Firefox41.0.1 + Windows8 で音声が途中から鳴らなくなる
  87                                                                 !( 40 <= X_UA[ 'Gecko' ] && X_UA[ 'Gecko' ] < 42 && X_UA[ 'Windows' ] ) &&
  88                                                                 ( window[ 'AudioContext' ] || window[ 'webkitAudioContext' ] ),
  89         X_WebAudio_BUFFER_LIST  = [],
  90         X_WebAudio_need1stTouch = X_UA[ 'iOS' ],
  91         X_WebAudio,
  92         X_WebAudio_BufferLoader,
  93         X_WebAudio_fpsFix;
  94
  95 /*
  96  * iPhone 4s 以下、iPad2以下、iPad mini 1以下, iPod touch 4G 以下は不可
  97  */
  98 if( X_WebAudio_context ){
  99
 100         X_WebAudio_context = new X_WebAudio_context;
 101
 102         X_WebAudio_BufferLoader = X_EventDispatcher[ 'inherits' ](
 103                 'X.WebAudio.BufferLoader',
 104                 X_Class.POOL_OBJECT,
 105                 {
 106                         audioUrl        : '',
 107             xhr             : null,
 108             onDecodeSuccess : null,
 109             onDecodeError   : null,
 110
 111             audioBuffer     : null,
 112             errorState      : 0,
 113             webAudioList    : null,
 114
 115                         'Constructor' : function( webAudio, url ){
 116                                 this.webAudioList = [ webAudio ];
 117                                 this.audioUrl     = url;
 118                                 this.xhr = X[ 'Net' ]( { 'xhr' : url, 'dataType' : 'arraybuffer' } )
 119                                                                         [ 'listen' ]( X_EVENT_PROGRESS, this )
 120                                                                         [ 'listenOnce' ]( [ X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 121                                 X_WebAudio_BUFFER_LIST.push( this );
 122                         },
 123
 124                         handleEvent : function( e ){
 125                                 switch( e.type ){
 126                                         case X_EVENT_PROGRESS :
 127                                                 this[ 'dispatch' ]( { type : 'progress', 'percent' : e[ 'percent' ] } );
 128                                                 return;
 129
 130                                         case X_EVENT_SUCCESS :
 131                                         // TODO 旧api
 132                                         // https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API/Porting_webkitAudioContext_code_to_standards_based_AudioContext
 133
 134                                         // http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 135                                         // 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
 136                                         // 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）。
 137                                         // ただし iOS 8.1.2 では エラーになる
 138                                                 if( X_UA[ 'iOS' ] < 8 || !X_WebAudio_context[ 'decodeAudioData' ] ){
 139                                                         this._onDecodeSuccess( X_WebAudio_context[ 'createBuffer' ]( e.response, false ) );
 140                                                 } else
 141                                                 if( X_WebAudio_context[ 'decodeAudioData' ] ){
 142                                                         X_WebAudio_context[ 'decodeAudioData' ]( e.response,
 143                                                                 this.onDecodeSuccess = X_Closure_create( this, this._onDecodeSuccess ),
 144                                                                 this.onDecodeError   = X_Closure_create( this, this._onDecodeError ) );
 145                                                 };
 146                                                 break;
 147
 148                                         case X_EVENT_COMPLETE :
 149                                                 this.errorState = 1;
 150                                                 this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 151                                                 break;
 152                                 };
 153                                 this.xhr[ 'unlisten' ]( [ X_EVENT_PROGRESS, X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 154                                 delete this.xhr;
 155                         },
 156
 157                                 _onDecodeSuccess : function( buffer ){
 158                                         this.onDecodeSuccess && this._onDecodeComplete();
 159
 160                         if ( !buffer ) {
 161                                 this.errorState = 2;
 162                             this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 163                             return;
 164                         };
 165
 166                         console.log( 'WebAudio decode success!' );
 167
 168                         this.audioBuffer = buffer;
 169
 170                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 171
 172                         console.log( 'WebAudio decoded!' );
 173                                 },
 174
 175                                 _onDecodeError : function(){
 176                                         console.log( 'WebAudio decode error!' );
 177                                         this._onDecodeComplete();
 178                                         this.errorState = 2;
 179                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 180                                 },
 181
 182                                 _onDecodeComplete : function(){
 183                                         X_Closure_correct( this.onDecodeSuccess );
 184                                         delete this.onDecodeSuccess;
 185                                         X_Closure_correct( this.onDecodeError );
 186                                         delete this.onDecodeError;
 187                                 },
 188
 189                         unregister : function( webAudio ){
 190                                 var list = this.webAudioList,
 191                                         i    = list.indexOf( webAudio );
 192                                 if( 0 < i ){
 193                                         list.splice( i, 1 );
 194                                         if( list.length ){
 195                                                 this.xhr && this.xhr[ 'kill' ]();
 196                                                 this[ 'kill' ]();
 197                                         };
 198                                 };
 199                         }
 200
 201                 }
 202         );
 203
 204
 205         X_WebAudio = X_AudioBase[ 'inherits' ](
 206                 'X.WebAudio',
 207                 X_Class.POOL_OBJECT,
 208                 {
 209
 210                         loader          : null,
 211
 212                         _startPos       : 0,
 213                         _endPosition    : 0,
 214                         _startTime      : 0,
 215             _timerID        : 0,
 216             _interval       : 0,
 217                 audioBuffer     : null,
 218                 bufferSource    : null,
 219             gainNode        : null,
 220             _onended        : null,
 221
 222                         'Constructor' : function( disatcher, url, option ){
 223                                 var i = 0,
 224                                         l = X_WebAudio_BUFFER_LIST.length,
 225                                         loader;
 226
 227                                 /*
 228                                  * http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 229                                  * 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。
 230                                  * 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。
 231                                  */
 232                                 if( X_UA[ 'Android' ] && X_UA[ 'Chrome' ] && !X_WebAudio_fpsFix ){
 233                                         X_Node_systemNode.create( 'div', { id : 'fps-slowdown-make-sound-noisy' } );
 234                                         X_WebAudio_fpsFix = true;
 235                                 };
 236
 237                                 for( ; i < l; ++i ){
 238                                         loader = X_WebAudio_BUFFER_LIST[ i ];
 239                                         if( loader.audioUrl === url ){
 240                                                 this.loader = loader;
 241                                                 loader.webAudioList.push( this );
 242                                                 break;
 243                                         };
 244                                 };
 245
 246                                 if( !this.loader ){
 247                                         this.loader = loader = X_WebAudio_BufferLoader( this, url );
 248                                 };
 249
 250                                 this.disatcher = disatcher || this;
 251                                 this.setState( option );
 252
 253                                 this[ 'listenOnce' ]( X_EVENT_KILL_INSTANCE, this.onKill );
 254
 255                                 if( loader.audioBuffer || loader.errorState ){
 256                                         this._onLoadBufferComplete();
 257                                 } else {
 258                                         loader[ 'listenOnce' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 259                                 };
 260                         },
 261
 262                         onKill : function(){
 263                                 this.loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete )
 264                                         .unregister( this );
 265
 266                                 delete this.audioBuffer;
 267
 268                                 this.playing      && this.actualPause();
 269                     this.bufferSource && this._sourceDispose();
 270
 271                     this._onended     && X_Closure_correct( this._onended );
 272
 273                     this.gainNode     && this.gainNode.disconnect();
 274                         },
 275                                 _onLoadBufferComplete : function( e ){
 276                                         var loader = this.loader,
 277                                                 buffer = loader.audioBuffer;
 278
 279                                         e && loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 280
 281                         if ( !buffer ) {
 282                                 this.error = loader.errorState;
 283
 284                             this.disatcher[ 'dispatch' ]({
 285                                                                 type    : X_EVENT_ERROR,
 286                                                                 error   : loader.errorState,
 287                                                                 message : loader.errorState === 1 ?
 288                                                                                         'load buffer network error' :
 289                                                                                         'buffer decode error'
 290                                                         });
 291                                                 this[ 'kill' ]();
 292                             return;
 293                         };
 294
 295                         this.audioBuffer = buffer;
 296                         this.duration    = buffer.duration * 1000;
 297
 298                                         this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );
 299
 300                         console.log( 'WebAudio buffer ready' );
 301
 302                         this.autoplay && X_Timer_once( 16, this, this.play );
 303
 304                                 },
 305
 306                         actualPlay : function(){
 307                                 var begin, end;
 308
 309                                 console.log( '[WebAudio] play abuf:' + !!this.audioBuffe );
 310
 311                     if( !this.audioBuffer ){
 312                         this.autoplay = true;
 313                         return;
 314                     };
 315
 316                                 end   = X_Audio_getEndTime( this );
 317                                 begin = X_Audio_getStartTime( this, end, true );
 318
 319                                 console.log( '[WebAudio] play ' + begin + ' -> ' + end );
 320
 321                                 if( this.bufferSource ) this._sourceDispose();
 322                                 if( !this.gainNode ){
 323                                         this.gainNode = X_WebAudio_context[ 'createGain' ] ? X_WebAudio_context[ 'createGain' ]() : X_WebAudio_context[ 'createGainNode' ]();
 324                         this.gainNode[ 'connect' ]( X_WebAudio_context[ 'destination' ] );
 325                                 };
 326                     this.bufferSource        = X_WebAudio_context[ 'createBufferSource' ]();
 327                     this.bufferSource.buffer = this.audioBuffer;
 328                     this.bufferSource[ 'connect' ]( this.gainNode );
 329
 330                     this.gainNode[ 'gain' ].value = this.gain;
 331
 332                     // おかしい、stop 前に外していても呼ばれる、、、@Firefox33.1
 333                     // 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
 334                     // 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
 335                 //if( this.bufferSource.onended !== undefined ){
 336                         //console.log( '> use onended' );
 337                         //this.bufferSource.onended = this._onended || ( this._onended = X_Closure_create( this, this._onEnded ) );
 338                 //} else {
 339                         this._timerID && X_Timer_remove( this._timerID );
 340                                         this._timerID = X_Timer_once( end - begin, this, this._onEnded );
 341                 //};
 342
 343                     if( this.bufferSource.start ){
 344                         this.bufferSource.start( 0, begin / 1000, end / 1000 );
 345                     } else {
 346                         this.bufferSource[ 'noteGrainOn' ]( 0, begin / 1000, end / 1000 );
 347                     };
 348
 349                     this.playing      = true;
 350                     this._startPos    = begin;
 351                     this._endPosition = end;
 352                     this._startTime   = X_WebAudio_context.currentTime * 1000;
 353                     this._interval    = this._interval || X_Timer_add( 1000, 0, this, this._onInterval );
 354                         },
 355
 356                                 _sourceDispose : function(){
 357                             this.bufferSource.disconnect();
 358                             delete this.bufferSource.onended;
 359                             delete this.bufferSource;
 360                         },
 361
 362                                 _onInterval : function(){
 363                                         if( !this.playing ){
 364                                                 delete this._interval;
 365                                                 return X_CALLBACK_UN_LISTEN;
 366                                         };
 367                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_PLAYING );
 368                                 },
 369
 370                                 _onEnded : function(){
 371                                         var time;
 372                                         delete this._timerID;
 373
 374                             if( this.playing ){
 375                                 time = X_WebAudio_context.currentTime * 1000 - this._startTime - this._endPosition + this._startPos | 0;
 376                                 //console.log( '> onEnd ' + ( this.playing && ( X_WebAudio_context.currentTime * 1000 - this._startTime ) ) + ' < ' + ( this._endPosition - this._startPos ) );
 377                                 if( this._onended ){
 378                                         // Firefox 用の対策,,,
 379                                         if( time < 0 ) return;
 380                                 } else {
 381                                         if( time < 0 ){
 382                                                 //console.log( '> onEnd crt:' + ( X_WebAudio_context.currentTime * 1000 ) + ' startTime:' + this._startTime +
 383                                                 //      ' from:' + this._startPos + ' to:' + this._endPosition );
 384                                                 this._timerID = X_Timer_once( -time, this, this._onEnded );
 385                                                 return;
 386                                         };
 387                                 };
 388
 389                                 if( this.autoLoop ){
 390                                         if( !( this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){
 391                                                 this.looped = true;
 392                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );
 393                                                 this.actualPlay();
 394                                         };
 395                                 } else {
 396                                         this.actualPause();
 397                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );
 398                                 };
 399                             };
 400                                 },
 401
 402                         actualPause : function(){
 403                                 //if( !this.playing ) return this;
 404
 405                                 console.log( '[WebAudio] pause' );
 406
 407                                 this.seekTime = this.getActualCurrentTime();
 408
 409                     this._timerID && X_Timer_remove( this._timerID );
 410                                 delete this._timerID;
 411                                 delete this.playing;
 412
 413                     if( this.bufferSource ){
 414                         if( this.bufferSource.onended ) delete this.bufferSource.onended;
 415
 416                         this.bufferSource.stop ?
 417                                 this.bufferSource.stop( 0 ) : this.bufferSource[ 'noteOff' ]( 0 );
 418                     };
 419                         },
 420
 421                         getActualCurrentTime : function(){
 422                                 return X_WebAudio_context.currentTime * 1000 - this._startTime + this._startPos | 0;
 423                         },
 424
 425                         afterUpdateState : function( result ){
 426                                 if( result & 2 || result & 1 ){ // seek
 427                         this.actualPlay();
 428                                 } else
 429                                 if( result & 4 ){
 430                        this.gainNode[ 'gain' ].value = this.gain;
 431                                 };
 432                         }
 433
 434                 }
 435         );
 436
 437         X_Audio_BACKENDS.push(
 438                 {
 439                         backendID   : 1,
 440
 441                         backendName : 'WebAudio',
 442
 443                         canPlay     : X_Audio_codecs,
 444
 445                         detect      : function( proxy, source, ext ){
 446                                 proxy[ 'asyncDispatch' ]( { type : X_EVENT_COMPLETE, canPlay : X_Audio_codecs[ ext ] } );
 447                         },
 448
 449                         klass : X_WebAudio
 450                 }
 451         );
 452 };