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( target, 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.target  = target || this;
 249
 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.target[ '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.target[ '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                     if( !this.audioBuffer ){
 309                         this.autoplay = true;
 310                         return;
 311                     };
 312
 313                                 end   = X_Audio_getEndTime( this );
 314                                 begin = X_Audio_getStartTime( this, end, true );
 315
 316                                 console.log( '[WebAudio] play ' + begin + ' -> ' + end );
 317
 318                                 if( this.bufferSource ) this._sourceDispose();
 319                                 if( !this.gainNode ){
 320                                         this.gainNode = X_WebAudio_context[ 'createGain' ] ? X_WebAudio_context[ 'createGain' ]() : X_WebAudio_context[ 'createGainNode' ]();
 321                         this.gainNode[ 'connect' ]( X_WebAudio_context[ 'destination' ] );
 322                                 };
 323                     this.bufferSource        = X_WebAudio_context[ 'createBufferSource' ]();
 324                     this.bufferSource.buffer = this.audioBuffer;
 325                     this.bufferSource[ 'connect' ]( this.gainNode );
 326
 327                     this.gainNode[ 'gain' ].value = this.gain;
 328
 329                     // おかしい、stop 前に外していても呼ばれる、、、@Firefox33.1
 330                     // 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
 331                     // 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
 332                 //if( this.bufferSource.onended !== undefined ){
 333                         //console.log( '> use onended' );
 334                         //this.bufferSource.onended = this._onended || ( this._onended = X_Closure_create( this, this._onEnded ) );
 335                 //} else {
 336                         this._timerID && X_Timer_remove( this._timerID );
 337                                         this._timerID = X_Timer_once( end - begin, this, this._onEnded );
 338                 //};
 339
 340                     if( this.bufferSource.start ){
 341                         this.bufferSource.start( 0, begin / 1000, end / 1000 );
 342                     } else {
 343                         this.bufferSource[ 'noteGrainOn' ]( 0, begin / 1000, end / 1000 );
 344                     };
 345
 346                     this.playing      = true;
 347                     this._startPos    = begin;
 348                     this._endPosition = end;
 349                     this._startTime   = X_WebAudio_context.currentTime * 1000;
 350                     this._interval    = this._interval || X_Timer_add( 1000, 0, this, this._onInterval );
 351                         },
 352
 353                                 _sourceDispose : function(){
 354                             this.bufferSource.disconnect();
 355                             delete this.bufferSource.onended;
 356                             delete this.bufferSource;
 357                         },
 358
 359                                 _onInterval : function(){
 360                                         if( !this.playing ){
 361                                                 delete this._interval;
 362                                                 return X_CALLBACK_UN_LISTEN;
 363                                         };
 364                                         this.target[ 'dispatch' ]( X_EVENT_MEDIA_PLAYING );
 365                                 },
 366
 367                                 _onEnded : function(){
 368                                         var time;
 369                                         delete this._timerID;
 370
 371                             if( this.playing ){
 372                                 time = X_WebAudio_context.currentTime * 1000 - this._startTime - this._endPosition + this._startPos | 0;
 373                                 //console.log( '> onEnd ' + ( this.playing && ( X_WebAudio_context.currentTime * 1000 - this._startTime ) ) + ' < ' + ( this._endPosition - this._startPos ) );
 374                                 if( this._onended ){
 375                                         // Firefox 用の対策,,,
 376                                         if( time < 0 ) return;
 377                                 } else {
 378                                         if( time < 0 ){
 379                                                 //console.log( '> onEnd crt:' + ( X_WebAudio_context.currentTime * 1000 ) + ' startTime:' + this._startTime +
 380                                                 //      ' from:' + this._startPos + ' to:' + this._endPosition );
 381                                                 this._timerID = X_Timer_once( -time, this, this._onEnded );
 382                                                 return;
 383                                         };
 384                                 };
 385
 386                                 if( this.autoLoop ){
 387                                         if( !( this.target[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){
 388                                                 this.looped = true;
 389                                                 this.target[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );
 390                                                 this.actualPlay();
 391                                         };
 392                                 } else {
 393                                         this.actualPause();
 394                                         this.target[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );
 395                                 };
 396                             };
 397                                 },
 398
 399                         actualPause : function(){
 400                                 //if( !this.playing ) return this;
 401
 402                                 console.log( '[WebAudio] pause' );
 403
 404                                 this.seekTime = this.getActualCurrentTime();
 405
 406                     this._timerID && X_Timer_remove( this._timerID );
 407                                 delete this._timerID;
 408                                 delete this.playing;
 409
 410                     if( this.bufferSource ){
 411                         if( this.bufferSource.onended ) delete this.bufferSource.onended;
 412
 413                         this.bufferSource.stop ?
 414                                 this.bufferSource.stop( 0 ) : this.bufferSource[ 'noteOff' ]( 0 );
 415                     };
 416                         },
 417
 418                         getActualCurrentTime : function(){
 419                                 return X_WebAudio_context.currentTime * 1000 - this._startTime + this._startPos | 0;
 420                         },
 421
 422                         afterUpdateState : function( result ){
 423                                 if( result & 2 || result & 1 ){ // seek
 424                         this.actualPlay();
 425                                 } else
 426                                 if( result & 4 ){
 427                        this.gainNode[ 'gain' ].value = this.gain;
 428                                 };
 429                         }
 430
 431                 }
 432         );
 433
 434         X_Audio_BACKENDS.push(
 435                 {
 436                         backendID   : 1,
 437
 438                         backendName : 'WebAudio',
 439
 440                         canPlay     : X_Audio_codecs,
 441
 442                         detect      : function( proxy, source, ext ){
 443                                 proxy[ 'asyncDispatch' ]( { type : X_EVENT_COMPLETE, canPlay : X_Audio_codecs[ ext ] } );
 444                         },
 445
 446                         klass : X_WebAudio
 447                 }
 448         );
 449 };