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