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                                                                 // Android2 + Gecko で WebAudio が極めて不安定
  83                                                                 !X_UA[ 'Fennec' ] &&
  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_need1stTouch = X_UA[ 'iOS' ],
  90         X_WebAudio,
  91         X_WebAudio_BufferLoader,
  92         X_WebAudio_fpsFix;
  93
  94 /*
  95  * iPhone 4s 以下、iPad2以下、iPad mini 1以下, iPod touch 4G 以下は不可
  96  */
  97 if( X_WebAudio_context ){
  98
  99         X_WebAudio_context = new X_WebAudio_context;
 100
 101         X_WebAudio_BufferLoader = X_EventDispatcher[ 'inherits' ](
 102                 'X.WebAudio.BufferLoader',
 103                 X_Class.POOL_OBJECT,
 104                 {
 105                         audioUrl        : '',
 106             xhr             : null,
 107             onDecodeSuccess : null,
 108             onDecodeError   : null,
 109
 110             audioBuffer     : null,
 111             errorState      : 0,
 112             webAudioList    : null,
 113
 114                         'Constructor' : function( webAudio, url ){
 115                                 this.webAudioList = [ webAudio ];
 116                                 this.audioUrl     = url;
 117                                 this.xhr = X[ 'Net' ]( { 'xhr' : url, 'dataType' : 'arraybuffer' } )
 118                                                                         [ 'listen' ]( X_EVENT_PROGRESS, this )
 119                                                                         [ 'listenOnce' ]( [ X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 120                                 X_WebAudio_BUFFER_LIST.push( this );
 121                         },
 122
 123                         handleEvent : function( e ){
 124                                 switch( e.type ){
 125                                         case X_EVENT_PROGRESS :
 126                                                 this[ 'dispatch' ]( { type : 'progress', 'percent' : e[ 'percent' ] } );
 127                                                 return;
 128
 129                                         case X_EVENT_SUCCESS :
 130                                         // TODO 旧api
 131                                         // https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API/Porting_webkitAudioContext_code_to_standards_based_AudioContext
 132
 133                                         // http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 134                                         // 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
 135                                         // 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）。
 136                                         // ただし iOS 8.1.2 では エラーになる
 137                                                 if( X_UA[ 'iOS' ] < 8 || !X_WebAudio_context[ 'decodeAudioData' ] ){
 138                                                         this._onDecodeSuccess( X_WebAudio_context[ 'createBuffer' ]( e.response, false ) );
 139                                                 } else
 140                                                 if( X_WebAudio_context[ 'decodeAudioData' ] ){
 141                                                         X_WebAudio_context[ 'decodeAudioData' ]( e.response,
 142                                                                 this.onDecodeSuccess = X_Closure_create( this, this._onDecodeSuccess ),
 143                                                                 this.onDecodeError   = X_Closure_create( this, this._onDecodeError ) );
 144                                                 };
 145                                                 break;
 146
 147                                         case X_EVENT_COMPLETE :
 148                                                 this.errorState = 1;
 149                                                 this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 150                                                 break;
 151                                 };
 152                                 this.xhr[ 'unlisten' ]( [ X_EVENT_PROGRESS, X_EVENT_SUCCESS, X_EVENT_COMPLETE ], this );
 153                                 delete this.xhr;
 154                         },
 155
 156                                 _onDecodeSuccess : function( buffer ){
 157                                         this.onDecodeSuccess && this._onDecodeComplete();
 158
 159                         if ( !buffer ) {
 160                                 this.errorState = 2;
 161                             this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 162                             return;
 163                         };
 164
 165                         console.log( 'WebAudio decode success!' );
 166
 167                         this.audioBuffer = buffer;
 168
 169                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 170
 171                         console.log( 'WebAudio decoded!' );
 172                                 },
 173
 174                                 _onDecodeError : function(){
 175                                         console.log( 'WebAudio decode error!' );
 176                                         this._onDecodeComplete();
 177                                         this.errorState = 2;
 178                                         this[ 'asyncDispatch' ]( X_EVENT_COMPLETE );
 179                                 },
 180
 181                                 _onDecodeComplete : function(){
 182                                         X_Closure_correct( this.onDecodeSuccess );
 183                                         delete this.onDecodeSuccess;
 184                                         X_Closure_correct( this.onDecodeError );
 185                                         delete this.onDecodeError;
 186                                 },
 187
 188                         unregister : function( webAudio ){
 189                                 var list = this.webAudioList,
 190                                         i    = list.indexOf( webAudio );
 191                                 if( 0 < i ){
 192                                         list.splice( i, 1 );
 193                                         if( list.length ){
 194                                                 this.xhr && this.xhr[ 'kill' ]();
 195                                                 this[ 'kill' ]();
 196                                         };
 197                                 };
 198                         }
 199
 200                 }
 201         );
 202
 203
 204         X_WebAudio = X_AudioBase[ 'inherits' ](
 205                 'X.WebAudio',
 206                 X_Class.POOL_OBJECT,
 207                 {
 208
 209                         loader          : null,
 210
 211                         _startPos       : 0,
 212                         _endPosition    : 0,
 213                         _startTime      : 0,
 214             _timerID        : 0,
 215             _interval       : 0,
 216                 audioBuffer     : null,
 217                 bufferSource    : null,
 218             gainNode        : null,
 219             _onended        : null,
 220
 221                         'Constructor' : function( disatcher, url, option ){
 222                                 var i = 0,
 223                                         l = X_WebAudio_BUFFER_LIST.length,
 224                                         loader;
 225
 226                                 /*
 227                                  * http://qiita.com/sou/items/5688d4e7d3a37b4e2ff1
 228                                  * 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。
 229                                  * 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。
 230                                  */
 231                                 if( X_UA[ 'Android' ] && X_UA[ 'Chrome' ] && !X_WebAudio_fpsFix ){
 232                                         X_Node_systemNode.create( 'div', { id : 'fps-slowdown-make-sound-noisy' } );
 233                                         X_WebAudio_fpsFix = true;
 234                                 };
 235
 236                                 for( ; i < l; ++i ){
 237                                         loader = X_WebAudio_BUFFER_LIST[ i ];
 238                                         if( loader.audioUrl === url ){
 239                                                 this.loader = loader;
 240                                                 loader.webAudioList.push( this );
 241                                                 break;
 242                                         };
 243                                 };
 244
 245                                 if( !this.loader ){
 246                                         this.loader = loader = X_WebAudio_BufferLoader( this, url );
 247                                 };
 248
 249                                 this.disatcher = disatcher || this;
 250                                 this.setState( option );
 251
 252                                 this[ 'listenOnce' ]( X_EVENT_KILL_INSTANCE, this.onKill );
 253
 254                                 if( loader.audioBuffer || loader.errorState ){
 255                                         this._onLoadBufferComplete();
 256                                 } else {
 257                                         loader[ 'listenOnce' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 258                                 };
 259                         },
 260
 261                         onKill : function(){
 262                                 this.loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete )
 263                                         .unregister( this );
 264
 265                                 delete this.audioBuffer;
 266
 267                                 this.playing      && this.actualPause();
 268                     this.bufferSource && this._sourceDispose();
 269
 270                     this._onended     && X_Closure_correct( this._onended );
 271
 272                     this.gainNode     && this.gainNode.disconnect();
 273                         },
 274                                 _onLoadBufferComplete : function( e ){
 275                                         var loader = this.loader,
 276                                                 buffer = loader.audioBuffer;
 277
 278                                         e && loader[ 'unlisten' ]( X_EVENT_COMPLETE, this, this._onLoadBufferComplete );
 279
 280                         if ( !buffer ) {
 281                                 this.error = loader.errorState;
 282
 283                             this.disatcher[ 'dispatch' ]({
 284                                                                 type    : X_EVENT_ERROR,
 285                                                                 error   : loader.errorState,
 286                                                                 message : loader.errorState === 1 ?
 287                                                                                         'load buffer network error' :
 288                                                                                         'buffer decode error'
 289                                                         });
 290                                                 this[ 'kill' ]();
 291                             return;
 292                         };
 293
 294                         this.audioBuffer = buffer;
 295                         this.duration    = buffer.duration * 1000;
 296
 297                                         this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );
 298
 299                         console.log( 'WebAudio buffer ready' );
 300
 301                         this.autoplay && X_Timer_once( 16, this, this.play );
 302
 303                                 },
 304
 305                         actualPlay : function(){
 306                                 var begin, end;
 307
 308                                 console.log( '[WebAudio] play abuf:' + !!this.audioBuffe );
 309
 310                     if( !this.audioBuffer ){
 311                         this.autoplay = true;
 312                         return;
 313                     };
 314
 315                                 end   = X_Audio_getEndTime( this );
 316                                 begin = X_Audio_getStartTime( this, end, true );
 317
 318                                 console.log( '[WebAudio] play ' + begin + ' -> ' + end );
 319
 320                                 if( this.bufferSource ) this._sourceDispose();
 321                                 if( !this.gainNode ){
 322                                         this.gainNode = X_WebAudio_context[ 'createGain' ] ? X_WebAudio_context[ 'createGain' ]() : X_WebAudio_context[ 'createGainNode' ]();
 323                         this.gainNode[ 'connect' ]( X_WebAudio_context[ 'destination' ] );
 324                                 };
 325                     this.bufferSource        = X_WebAudio_context[ 'createBufferSource' ]();
 326                     this.bufferSource.buffer = this.audioBuffer;
 327                     this.bufferSource[ 'connect' ]( this.gainNode );
 328
 329                     this.gainNode[ 'gain' ].value = this.gain;
 330
 331                     // おかしい、stop 前に外していても呼ばれる、、、@Firefox33.1
 332                     // 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
 333                     // 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
 334                 //if( this.bufferSource.onended !== undefined ){
 335                         //console.log( '> use onended' );
 336                         //this.bufferSource.onended = this._onended || ( this._onended = X_Closure_create( this, this._onEnded ) );
 337                 //} else {
 338                         this._timerID && X_Timer_remove( this._timerID );
 339                                         this._timerID = X_Timer_once( end - begin, this, this._onEnded );
 340                 //};
 341
 342                     if( this.bufferSource.start ){
 343                         this.bufferSource.start( 0, begin / 1000, end / 1000 );
 344                     } else {
 345                         this.bufferSource[ 'noteGrainOn' ]( 0, begin / 1000, end / 1000 );
 346                     };
 347
 348                     this.playing      = true;
 349                     this._startPos    = begin;
 350                     this._endPosition = end;
 351                     this._startTime   = X_WebAudio_context.currentTime * 1000;
 352                     this._interval    = this._interval || X_Timer_add( 1000, 0, this, this._onInterval );
 353                         },
 354
 355                                 _sourceDispose : function(){
 356                             this.bufferSource.disconnect();
 357                             delete this.bufferSource.onended;
 358                             delete this.bufferSource;
 359                         },
 360
 361                                 _onInterval : function(){
 362                                         if( !this.playing ){
 363                                                 delete this._interval;
 364                                                 return X_CALLBACK_UN_LISTEN;
 365                                         };
 366                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_PLAYING );
 367                                 },
 368
 369                                 _onEnded : function(){
 370                                         var time;
 371                                         delete this._timerID;
 372
 373                             if( this.playing ){
 374                                 time = X_WebAudio_context.currentTime * 1000 - this._startTime - this._endPosition + this._startPos | 0;
 375                                 //console.log( '> onEnd ' + ( this.playing && ( X_WebAudio_context.currentTime * 1000 - this._startTime ) ) + ' < ' + ( this._endPosition - this._startPos ) );
 376                                 if( this._onended ){
 377                                         // Firefox 用の対策,,,
 378                                         if( time < 0 ) return;
 379                                 } else {
 380                                         if( time < 0 ){
 381                                                 //console.log( '> onEnd crt:' + ( X_WebAudio_context.currentTime * 1000 ) + ' startTime:' + this._startTime +
 382                                                 //      ' from:' + this._startPos + ' to:' + this._endPosition );
 383                                                 this._timerID = X_Timer_once( -time, this, this._onEnded );
 384                                                 return;
 385                                         };
 386                                 };
 387
 388                                 if( this.autoLoop ){
 389                                         if( !( this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){
 390                                                 this.looped = true;
 391                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );
 392                                                 this.actualPlay();
 393                                         };
 394                                 } else {
 395                                         this.actualPause();
 396                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );
 397                                 };
 398                             };
 399                                 },
 400
 401                         actualPause : function(){
 402                                 //if( !this.playing ) return this;
 403
 404                                 console.log( '[WebAudio] pause' );
 405
 406                                 this.seekTime = this.getActualCurrentTime();
 407
 408                     this._timerID && X_Timer_remove( this._timerID );
 409                                 delete this._timerID;
 410                                 delete this.playing;
 411
 412                     if( this.bufferSource ){
 413                         if( this.bufferSource.onended ) delete this.bufferSource.onended;
 414
 415                         this.bufferSource.stop ?
 416                                 this.bufferSource.stop( 0 ) : this.bufferSource[ 'noteOff' ]( 0 );
 417                     };
 418                         },
 419
 420                         getActualCurrentTime : function(){
 421                                 return X_WebAudio_context.currentTime * 1000 - this._startTime + this._startPos | 0;
 422                         },
 423
 424                         afterUpdateState : function( result ){
 425                                 if( result & 2 || result & 1 ){ // seek
 426                         this.actualPlay();
 427                                 } else
 428                                 if( result & 4 ){
 429                        this.gainNode[ 'gain' ].value = this.gain;
 430                                 };
 431                         }
 432
 433                 }
 434         );
 435
 436         X_Audio_BACKENDS.push(
 437                 {
 438                         backendID   : 1,
 439
 440                         backendName : 'WebAudio',
 441
 442                         canPlay     : X_Audio_codecs,
 443
 444                         detect      : function( proxy, source, ext ){
 445                                 proxy[ 'asyncDispatch' ]( { type : X_EVENT_COMPLETE, canPlay : X_Audio_codecs[ ext ] } );
 446                         },
 447
 448                         klass : X_WebAudio
 449                 }
 450         );
 451 };