0.6.x/js/07_audio/02_XHTMLAudio.js

   1 \r
   2 /*\r
   3  * original : uupaa-js HTML5Audio.js\r
   4  * https://code.google.com/p/uupaa-js/source/browse/trunk/0.8/src/Audio/HTML5Audio.js?r=568\r
   5  * \r
   6  * Windows 版 Safari は QuickTime のインストールが必要\r
   7  * \r
   8  * 1. iOS4(iPod 2G) で ended に達すると音が鳴らなくなる fix で解決\r
   9  * 2. iOS6(iPod 4G) で ended に達すると音が鳴らなくなる fix で頻度が改善 emded イベントは発しないので、timeupdate 時に currentTime で判断する\r
  10  * 3. WP7(IS12T) で最後の方にある音が鳴らない? mp3 cbr を使えばいい? 裏に回っても音が鳴り続ける\r
  11  * 4. AOSP 2.x で ended に達すると音が鳴らなくなる -> リロード(audio.src='';audio.src=src;audio.load())でで解決\r
  12  * 5. AOSP 3.x で ended に達すると音が鳴らなくなる -> リロード(audio.src='';audio.sr=src)で解決、但し 2.x 4.x より遅延が大きく 1 秒弱程度ある\r
  13  * 6. AOSP 4.4.2- は ended に達した際に currentTime が変更できなくなり、リロードが必要になる, 4.0, 4.1, 4.2, 4.3 で確認, play() で頻度低下\r
  14  * 7. Android 4.4.4 Chrome WebView は ended に達した際に play() が必要\r
  15  * 8. BlinkOpera32 Win8 は HTMLAudio が壊れている、WebAudio は mp3 がデコードに失敗、ogg が動作\r
  16  * \r
  17  * memo\r
  18  * 1. AOSP4.1 iframe 内の Audio は親に focus が移っても再生を継続する\r
  19  * 2. AOSP4.2(Genymotion) どこかのタイミングでタッチによる play を行う\r
  20  * 3. AOSP oggはシークが乱れる m4a, mp3 は優秀\r
  21  */\r
  22         /*\r
  23          * durationFix\r
  24          *  duration が取得できるタイミングが遅くそれまでは infinity(PC Opera12), NaN(WP9), 0(Android 標準ブラウザ ChromeWebView) が入っている\r
  25          * \r
  26          *   1. touch が不要の場合、自動で再生を開始して duration を取得するまで再生する\r
  27          *        -> 取得後に pause or 通常再生\r
  28          *   2. touch が必要な場合、タッチイベント内の audio.play() で duration 取得\r
  29          * \r
  30          *  PC Opera12\r
  31          *   1. loadeddata 等では duration が infinity で、再生後の durationchange 時に duration が判明する\r
  32          *   2. duration 判明後には currentTime によるシークと、現在時間の取得が可能になる。\r
  33          *   3. Opera12.17 Win32(XP) portable apps は勝手に再生が始まる、、、Win8+Opera では発生しない\r
  34          *        -> その際には timeupdate が発行されない、、、　iframe+image+audio で使わないときは破棄する、とか。\r
  35          *        -> opera11、10.54 WinXP はまとも、、、 portable が怪しい??\r
  36          */\r
  37 \r
  38 var X_HTMLAudio_playTrigger =\r
  39                 X_UA[ 'iOS' ] < 5    ? 'stalled' :\r
  40                 X_UA[ 'iOS' ] < 6    ? 'suspend' :\r
  41                 X_UA[ 'iOS' ] < 7    ? 'suspend' :\r
  42                 X_UA[ 'iOS' ]        ? 'loadeddata' :\r
  43                 X_UA[ 'Safari' ] < 4 ? 'canplaythrough' :\r
  44                 X_UA[ 'ChromeWV' ]   ? 'canplaythrough' :\r
  45                 // Android 2.3.5(SBM101SH) では stalled は発生しない,,,　ので必ず loadeddata もチェックする\r
  46                 //X_UA[ 'AOSP' ] < 3 ? 'stalled' :\r
  47                 //X_UA[ 'AOSP' ] ? 'playing' :\r
  48                 X_UA[ 'OperaMobile' ] || X_UA[ 'OperaTablet' ] ? 'loadeddata' :\r
  49                         'loadeddata', //'canplay',\r
  50         X_HTMLAudio,\r
  51         \r
  52         // ended が発生しない timeupdate 内で play() を呼ぶ (未検証) 不具合確認は iOS4,6\r
  53         X_HTMLAudio_endedFixIOS     = X_UA[ 'iOS' ] < 7,\r
  54         // Android 2.3.5 で ended 時に audio.src='';audio.src=src;audio.load() を実施。 2.3.4 でも問題なし。\r
  55         X_HTMLAudio_endedFixAOSP2   = X_UA[ 'AOSP' ] < 3,\r
  56         // Android 3.1 で ended 時に src='';src=src を実施。\r
  57         X_HTMLAudio_endedFixAOSP3   = !X_HTMLAudio_endedFixAOSP2 && X_UA[ 'AOSP' ] < 4,\r
  58         // ended 時に play() を実施, currentTime が duration に張り付き更新されなければ  src='';src=src を実施。\r
  59         X_HTMLAudio_endedFixAOSP4   = 4 <= X_UA[ 'AOSP' ],\r
  60         // ended 時に play() を実施\r
  61         X_HTMLAudio_endedFixCWV     = X_UA[ 'ChromeWV' ],\r
  62         \r
  63         // Opera Mobile 12 は 2回目以降の currentTime へのセットで currentTime が更新されなくなるため、タイマーを使用する\r
  64         X_HTMLAudio_currentTimeFix  = !!X_UA[ 'OperaMobile' ] || !!X_UA[ 'OperaTablet' ],\r
  65 \r
  66         X_HTMLAudio_volumeFix       = X_UA[ 'Chrome' ],\r
  67         /*\r
  68          * win opera12 volume, mute の変更が2度目以降できない\r
  69          */\r
  70         X_HTMLAudio_volumeEnabled   = !( X_UA[ 'WinPhone' ] && X_UA[ 'IE9' ] ) && !X_UA[ 'Opera' ],\r
  71         // Gecko PC + Android でseek時に再生がしばしば止まる問題の修正\r
  72         X_HTMLAudio_needPlayForSeek = X_UA[ 'Gecko' ],\r
  73         // \r
  74         X_HTMLAudio_pauseFix            = ( X_UA[ 'Windows' ] && 12 <= X_UA[ 'Opera' ] && 0 < ' XP XPSP2 2003|XP64'.indexOf( X_UA[ 'Windows' ] ) ), // XP + Opera12 のみ?\r
  75 \r
  76         X_HTMLAudio_need1stTouch        = X_UA[ 'iOS' ] || 4 <= X_UA[ 'AOSP' ] || X_UA[ 'ChromeWV' ] || X_UA[ 'WinPhone' ],     \r
  77         X_HTMLAudio_durationFix     = X_UA[ 'iOS' ] || X_UA[ 'ChromeWV' ] || ( X_UA[ 'Windows' ] && 12 <= X_UA[ 'Opera' ] ) || ( X_UA[ 'WinPhone' ] && X_UA[ 'IE9' ] ),\r
  78         \r
  79         X_HTMLAudio_shortPlayFix        = X_UA[ 'AOSP' ]; // Android 4.1.1 でも遭遇\r
  80         \r
  81         \r
  82 \r
  83 if( X_Audio_constructor ){\r
  84         \r
  85         X_HTMLAudio = X_AudioBase[ 'inherits' ](\r
  86                 'X.HTMLAudio',\r
  87                 X_Class.POOL_OBJECT,\r
  88                 {\r
  89                         _closed               : true,\r
  90                         _loaded               : false,\r
  91                         _ready            : false,              \r
  92                         _src                      : '',\r
  93                         \r
  94                         _currentFixStart  : 0,\r
  95                         _currentFixBegin  : 0,\r
  96 \r
  97                         _durationFixPhase : X_HTMLAudio_durationFix ? 1 : 0,\r
  98                         _durationFixSkip  : X_HTMLAudio_durationFix && !X_HTMLAudio_need1stTouch,\r
  99                         _lastCurrentTime  : 0,\r
 100 \r
 101                         _shortPlayFixON   : false,\r
 102                         _shortPlayFixTime : 0,\r
 103                         \r
 104                         _endedFixON               : false,\r
 105                         \r
 106                         'Constructor' : function( disatcher, source, option ){\r
 107                                 var raw;\r
 108                                 \r
 109                                 this.disatcher = disatcher || this;\r
 110                                 this._closed   = false;\r
 111                                 this._src          = source;\r
 112                                 \r
 113                                 if( X_HTMLAudio_shortPlayFix ){\r
 114                                         this._shortPlayFixON = X_URL_getEXT( source ) === 'm4a';\r
 115                                 };\r
 116                                 \r
 117                                 this.setState( option );\r
 118 \r
 119                                 if( option[ 'useVideo' ] ){\r
 120                                         raw = document.createElement( 'video' );\r
 121                                         raw.preload                   = 'none'; // auto, metadata, none\r
 122                                         raw.autoplay              = false, // no-auto\r
 123                                         raw.loop                          = false;\r
 124                                         raw.muted                         = false;\r
 125                                         raw.crossorigin       = option[ 'crossorigin' ] || ''; //crossorigin: "anonymous", X.URL.isSameDomain() で切り替え\r
 126                                         raw.style.cssText         = 'position:absolute;bottom:0;left:-50px;width:100px;height:100px;opacity:0;';\r
 127                                         raw.controls              = false;\r
 128                                         raw.WebKitPlaysInline = true;\r
 129                                         raw.src                       = source;\r
 130                                         X_elmBody.appendChild( raw );\r
 131                                 } else {\r
 132                                         raw = X_TEMP.rawAudio || new X_Audio_constructor( source );\r
 133                                         // X_Doc_create( 'audio', { src : source } )[ 'appendTo' ]( X.Doc.body );\r
 134                                         raw.autobuffer = raw.autoplay = false;\r
 135                                 };\r
 136                                 \r
 137                                 this[ '_rawObject' ] = raw;\r
 138                                 \r
 139                                 this[ 'listen' ]( [\r
 140                                                 X_EVENT_KILL_INSTANCE,\r
 141                                                 X_HTMLAudio_playTrigger,\r
 142                                                 //'loadstart', 'load',\r
 143                                                 'progress', 'error',\r
 144                                                 // 'suspend', 'abort', 'emptied', 'stalled',\r
 145                                                 // 'play', 'pause', 'seeked', 'ratechange', 'volumechange',\r
 146                                                 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough',\r
 147                                                 'playing', 'waiting', 'seeking',\r
 148                                                 'durationchange', 'timeupdate', 'ended' ] );\r
 149 \r
 150 \r
 151                                 this[ 'listen' ]( [\r
 152                                                 'loadstart', 'load',\r
 153                                                 'progress', 'error',\r
 154                                                 'suspend', 'abort', 'emptied', 'stalled',\r
 155                                                 'play', 'pause', 'seeked', 'ratechange', 'volumechange',\r
 156                                                 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough',\r
 157                                                 'playing', 'waiting', 'seeking',\r
 158                                                 'durationchange', 'timeupdate', 'ended' ], this.onDebug );\r
 159 \r
 160                                 if( X_TEMP.rawAudio ){\r
 161                                         raw.src = source;\r
 162                                         X_UA[ 'AOSP' ] < 3 && raw.load();\r
 163                                         delete X_TEMP.rawAudio;\r
 164                                 };\r
 165                         },\r
 166                         \r
 167                         onDebug : function( e ){\r
 168                                 this.disatcher[ 'dispatch' ]( {\r
 169                                         type       : X_EVENT_DEBUG,\r
 170                                         'rawEvent' : e.type,\r
 171                                         current    : this.getActualCurrentTime() | 0,\r
 172                                         duration   : this.duration | 0 } );\r
 173                         },\r
 174                         \r
 175                         handleEvent : function( e ){\r
 176                                 var raw    = this[ '_rawObject' ],\r
 177                                         actualEnded = e.type === 'ended',\r
 178                                         ended       = actualEnded,\r
 179                                         ready       = e.type === X_HTMLAudio_playTrigger,\r
 180                                         eventType, duration, end, now;\r
 181                                 \r
 182                                 // global に公開\r
 183                                 //window[ '__rawAudio' ] = this[ '_rawObject' ];\r
 184                                 \r
 185                                 e.type !== 'timeupdate' && console.log( ' > ' + e.type );\r
 186                                         \r
 187                                 switch( e.type ){\r
 188 \r
 189                                         case X_EVENT_KILL_INSTANCE :\r
 190                                                 // 【javascript】モバイル向けブラウザでも音を鳴らしたい【WebAudio】\r
 191                                                 // http://ingaouhou.com/archives/3633\r
 192                                                 // ・使い終わったインスタンスはload()しておくとやや安定\r
 193                                                 this.playing && this.actualPause();\r
 194                                                 delete this._closed;\r
 195                                                 delete this._loaded;\r
 196                                                 \r
 197                                                 raw.src = '';\r
 198                                                 raw.load();\r
 199                                                 \r
 200                                                 // removeChild for video\r
 201                                                 break;\r
 202 \r
 203                                         //case 'loadstart' :      //    ブラウザがコンテンツの検索を開始した場合に発生\r
 204                                                 //break;\r
 205                                         case 'progress' :          //   ブラウザがコンテンツの取得を実行した場合に発生\r
 206                                                 // console.log( e.loaded + ' ' + e.total * 100 + '%' );\r
 207                                                 // iem9 で常に0 raw.networkState;\r
 208                                                 // opera Android 12 で　buffered.end() へのアクセスはエラー　try catch も無効、iem9 は常に end(0) = 0\r
 209                                                 //console.log( 'buffered.end ' + raw.buffered && raw.buffered.end(0) ); \r
 210                                                 break;\r
 211                                         \r
 212                                         case 'loadeddata' :      //     コンテンツの表示を現在の再生位置で初めて行えるようになった場合に発生\r
 213                                                 if( !this._endedFixON ){\r
 214                                                         ready = true;\r
 215                                                 };\r
 216                                         case 'canplay' :                //      今すぐに再生を再開できるが、バッファリングが不十分でコンテンツを最後まで表示できないと予測している場合に発生\r
 217                                                 if( X_HTMLAudio_durationFix && !X_HTMLAudio_need1stTouch && this._durationFixPhase === 1 ){\r
 218                                                         console.log( '▲ DurationFix の開始 @' + e.type );\r
 219                                                         this._durationFixPhase = 2;\r
 220                                                         raw.play();\r
 221                                                         raw.currentTime = 0; // 必要！\r
 222                                                 };\r
 223                                         case 'canplaythrough' : //      今すぐに再生を開始してもバッファリングで停止することなく最後まで表示できると予測している場合に発生\r
 224                                                 if( this._endedFixON ){\r
 225                                                         console.log( '▽ onEndedFix の終了 @' + e.type  );\r
 226                                                         this._endedFixON = false;\r
 227                                                         this.actualPlay();\r
 228                                                 };\r
 229                                         case 'loadedmetadata' : //      ブラウザがメディアリソースの長さと寸法を判定した場合に発生\r
 230                                         case 'durationchange' : //  duration属性が更新された場合に発生\r
 231                                                 if( !this.duration ){\r
 232                                                         duration = raw.duration;\r
 233                                                 };\r
 234                                                 break;\r
 235         \r
 236                                         // TODO firefox で 短い音声でtimeupdate, ended が発火しない <- 最後の音に無音部分を追加する\r
 237                                         case 'timeupdate' :      //     通常の再生が行われ現在の再生位置の変化が起こった場合に発生\r
 238                                                 if( this._durationFixPhase & 3 ){ // 1 or 2\r
 239                                                         duration = raw.duration;\r
 240                                                 } else\r
 241                                                 if( this.getActualCurrentTime() === this._lastCurrentTime ){\r
 242                                                         eventType = X_EVENT_MEDIA_WAITING;\r
 243                                                 } else {\r
 244                                                         this._lastCurrentTime = this.getActualCurrentTime();\r
 245 \r
 246                                                         if( this.playing ){\r
 247                                                                 end = X_Audio_getEndTime( this ) + this._shortPlayFixTime;\r
 248                                                                 now = this.getActualCurrentTime();\r
 249                                                                 //console.log( now + ' / ' + end );\r
 250                                                                 if( 0 + end <= 0 + now ){ // 0+ なぜか iem9 で必要,,,\r
 251                                                                         if( this.autoLoop ){\r
 252                                                                                 console.log( '☆★☆ 曲の最後に到達 @timeupdate now-end:' + ( now - end ) );\r
 253                                                                                 ended = true;\r
 254                                                                                 if( X_HTMLAudio_endedFixIOS ) actualEnded = true;\r
 255                                                                         } else {\r
 256                                                                                 this.actualPause();\r
 257                                                                                 eventType = X_EVENT_MEDIA_ENDED;\r
 258                                                                         };\r
 259                                                                 } else {\r
 260                                                                         eventType = X_EVENT_MEDIA_PLAYING;\r
 261                                                                 };\r
 262                                                         };\r
 263                                                 };\r
 264                                                 break;\r
 265         \r
 266                                         //case 'stalled' :              //      ブラウザがコンテンツの取得を試みたが、データがまだ用意されていない場合に発生\r
 267                                                 // Android2 で ready 扱い?\r
 268                                         //case 'suspend' :              //      ブラウザが意図的にコンテンツの取得を現在行っていない場合に発生（ダウンロードは未完了）\r
 269                                                 // iOS で ready 扱い\r
 270                                         //case 'emptied' :              //      読み込み中に致命的なエラーが発生したか、実行状態ででload()メソッドが実行された場合に発生\r
 271                                         //case 'abort' :                  //    ダウンロードの完了前にコンテンツの取得を停止した場合に発生（この停止はエラーによるものではない）\r
 272                                         //      break;\r
 273                                                 \r
 274                                         case 'error' :            //    コンテンツの取得実行中にエラーが発生した場合に発生\r
 275                                                 // Opera12 src = '' で error が発生、無視する\r
 276                                                 // eventType = X_EVENT_ERROR;\r
 277                                                 break;\r
 278                                                 \r
 279                                         case 'playing' :                //      再生が開始された場合に発生\r
 280                                                 if( X_HTMLAudio_volumeFix ){\r
 281                                                         raw.volume = this.gain;\r
 282                                                 };\r
 283                                                 if( X_HTMLAudio_currentTimeFix && !this._currentFixStart ){\r
 284                                                         //this._currentFixStart = X_Timer_now(); // 正確な再生開始時間に補正\r
 285                                                 };\r
 286                                                 eventType = !this._durationFixSkip && !this._endedFixON ? X_EVENT_MEDIA_PLAYING : X_EVENT_MEDIA_WAITING;\r
 287                                         //case 'play' :            //   再生が開始された。play()メソッドからの復帰後に発生する場合に発生\r
 288                                         //case 'pause' :                  //    再生が一時停止された。pauseメソッドからの復帰後に発生する場合に発生\r
 289                                         //case 'seeked' : \r
 290                                         //case 'ratechange' :    // defaultPlaybackRate属性とplaybackRate属性のどちらかが更新された場合に発生\r
 291                                         //case 'volumechange' :   // volume属性とmuted属性のどちらかが変化した場合に発生\r
 292                                                 break;\r
 293                                         \r
 294                                         case 'waiting' :                //      次のフレームが利用不可のため再生を停止したが、そのフレームがやがて利用可能になると想定している場合に発生\r
 295                                                 eventType = X_EVENT_MEDIA_WAITING;\r
 296                                                 break;\r
 297                                         case 'seeking' :                //      シークがtrueに変化し、イベントを発生させるのに十分な時間がシーク操作にかかっている場合に発生\r
 298                                                 eventType = X_EVENT_MEDIA_SEEKING;\r
 299                                                 break;\r
 300                                 };\r
 301                                 \r
 302                                 // duration は Infinity, NaN, 0 の場合があるため、これを除外する\r
 303                                 if( 0 < duration && X_Type_isFinite( duration ) ){\r
 304                                         this.duration = duration * 1000;\r
 305 \r
 306                                         if( this._durationFixPhase === 2 ){\r
 307                                                 console.log( '▼ DurationFix の終了 @' + e.type );\r
 308                                                 this._durationFixPhase = 4;\r
 309                                                 \r
 310                                                 ready = true;\r
 311                                                 \r
 312                                                 if( this.autoplay || this._loaded ){\r
 313                                                         console.log( '☆ 再生 <- DurationFix の終了' );\r
 314                                                         this._durationFixSkip = false;\r
 315                                                         this.actualPlay();\r
 316                                                 } else\r
 317                                                 if( X_HTMLAudio_pauseFix ){\r
 318                                                         console.log( '☆ PAUSE <- DurationFix の終了' );\r
 319                                                         //raw.src = '';\r
 320                                                         //raw.load();\r
 321                                                         this.actualPause();                             \r
 322                                                 };\r
 323                                         } else\r
 324                                         if( this._durationFixPhase ){\r
 325                                                 this._durationFixPhase = 4;\r
 326                                         };                                      \r
 327                                 };\r
 328 \r
 329                                 this._loaded  = this._loaded || ready;\r
 330 \r
 331                                 // \r
 332                                 if( ended ){\r
 333                                         if( !this._closed && this.autoLoop ){\r
 334                                                 if( !( this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){\r
 335                                                         this.looped = true;\r
 336                                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );\r
 337                                                         ( X_HTMLAudio_endedFixAOSP3 || X_HTMLAudio_endedFixAOSP4 || X_HTMLAudio_endedFixCWV || X_HTMLAudio_endedFixIOS ) && actualEnded && console.log( '☆★☆ 音声の継続用の play() @ended' );\r
 338                                                         this.actualPlay(\r
 339                                                                 ( X_HTMLAudio_endedFixAOSP4 || X_HTMLAudio_endedFixCWV || X_HTMLAudio_endedFixIOS ) && actualEnded,\r
 340                                                                 ( X_HTMLAudio_endedFixAOSP3 || X_HTMLAudio_endedFixAOSP2 ) && actualEnded );\r
 341                                                 };\r
 342                                         } else {\r
 343                                                 this.seekTime = 0;\r
 344                                                 delete this.playing;\r
 345                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );\r
 346                                         };\r
 347                                 } else\r
 348                                 if( this._loaded && this.duration && !this._ready ){\r
 349                                         this._ready = true;\r
 350                                         this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );\r
 351                                         this.autoplay && !X_WebAudio_need1stTouch && X_Timer_once( 16, this, this.play );\r
 352                                         console.log( '> Audio Loaded!! ' + e.type + ' d:' + ( this.duration | 0 ) );\r
 353                                 } else\r
 354                                 if( eventType ){\r
 355                                         this.disatcher[ 'dispatch' ]( eventType );\r
 356                                         eventType === X_EVENT_ERROR && this[ 'kill' ]();\r
 357                                 };\r
 358                         },\r
 359 \r
 360                         actualPlay : function( forcePlay, forceReload ){\r
 361                                 var raw = this[ '_rawObject' ],\r
 362                                         begin, end;\r
 363                                 \r
 364                                 // もし kill 後に autoplayTimer で呼ばれても、_closed==true なので平気\r
 365                                 if( this._closed ) return;\r
 366                                 \r
 367                                 \r
 368                                 if( !raw.src ){ // X_HTMLAudio_pauseFix によって src が空になっている\r
 369                                         console.log( '○ 削除された audio.src の復帰' );\r
 370                                         raw.src = this._src;\r
 371                                         //return;\r
 372                                 };                              \r
 373                                 \r
 374                                 if( !this._ready && ( !X_HTMLAudio_durationFix || !X_HTMLAudio_need1stTouch ) ){\r
 375                                         this.autoplay = true;\r
 376                                         return;\r
 377                                 };\r
 378 \r
 379                                 if( X_HTMLAudio_durationFix && X_HTMLAudio_need1stTouch && this._durationFixPhase === 1 ){\r
 380                                         console.log( '▲ DurationFix の開始(タッチ用)' );\r
 381                                         this._durationFixPhase = 2;\r
 382                                 };\r
 383 \r
 384                                 end   = X_Audio_getEndTime( this );\r
 385                                 begin = X_Audio_getStartTime( this, end, true );\r
 386 \r
 387                                 this._lastCurrentTime = begin / 1000;\r
 388 \r
 389                                 if( this._shortPlayFixON ){\r
 390                                         this._shortPlayFixTime = ( 1000 < end - begin ) ? 200 : 400;\r
 391                                         if( this.duration < end + this._shortPlayFixTime ){\r
 392                                                 this._shortPlayFixTime = this.duration - end;\r
 393                                         };\r
 394                                 };\r
 395 \r
 396                                 if( this._durationFixSkip || this._endedFixON ){\r
 397                                         console.log( '☆ audio.play をスキップ ' + begin + ' -> ' + end + ' crt:' + ( raw.currentTime | 0 ) );\r
 398                                 } else {\r
 399                                         if( !this.playing ){\r
 400                                                 if( X_HTMLAudio_volumeFix ){\r
 401                                                         raw.volume = 0;\r
 402                                                 } else {\r
 403                                                         raw.volume = X_HTMLAudio_volumeEnabled ? this.gain : 1;\r
 404                                                 };\r
 405                                                 raw.play();\r
 406                                                 this.playing = true;\r
 407                                         } else\r
 408                                         if( X_HTMLAudio_needPlayForSeek || forcePlay ){\r
 409                                                 raw.play();\r
 410                                                 console.log( '[HTMLAudio] currentTime より先.' );\r
 411                                         };\r
 412                                         \r
 413                                         //http://himaxoff.blog111.fc2.com/blog-entry-97.html\r
 414                                         //Firefox3.6では一度も play() していない状態で currentTime = 0 を実行するとエラーになる。\r
 415                                         //また、GoogleChrome7 では currentTime = 0 直後に play() すると、pause()した位置前後の音が混ざることがある。(少なくとも自分の環境では)                                                                        \r
 416                                         raw.currentTime = this._lastCurrentTime;\r
 417                                         console.log( '[HTMLAudio] play ' + begin + ' -> ' + end + ' crt:' + ( raw.currentTime | 0 ) + ' last:' + this._lastCurrentTime );\r
 418 \r
 419                                         if( forceReload || ( X_HTMLAudio_endedFixAOSP4 && raw.duration && raw.currentTime === raw.duration ) ){\r
 420                                                 raw.src          = '';\r
 421                                                 raw.src          = this._src;\r
 422                                                 this.playing     = false;\r
 423                                                 this._endedFixON = true;\r
 424                                                 console.log( '△ onEndedFix の開始' );\r
 425                                                 raw.currentTime  = this._lastCurrentTime;\r
 426                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_WAITING );\r
 427                                                 X_HTMLAudio_endedFixAOSP2 && raw.load();\r
 428                                         };\r
 429                                 };\r
 430 \r
 431                                 if( X_HTMLAudio_currentTimeFix ){\r
 432                                         this._currentFixBegin = begin;\r
 433                                         this._currentFixStart = X_Timer_now();\r
 434                                 };\r
 435                         },\r
 436                         \r
 437                         actualPause : function(){\r
 438                                 console.log( '[HTMLAudio] pause' );\r
 439                                 \r
 440                                 this.seekTime = this.getActualCurrentTime();\r
 441 \r
 442                                 delete this._currentFixStart;\r
 443 \r
 444                                 !this[ '_rawObject' ].error && this[ '_rawObject' ].pause();\r
 445                                 \r
 446                                 if( X_HTMLAudio_pauseFix ){\r
 447                                         this[ '_rawObject' ].src = '';\r
 448                                         if( X_HTMLAudio_durationFix ){\r
 449                                                 delete this._durationFixPhase;\r
 450                                                 delete this._durationFixSkip;\r
 451                                         };\r
 452                                 };\r
 453                                 delete this.playing;\r
 454                         },\r
 455                         \r
 456                         getActualCurrentTime : function(){\r
 457                                 return ( X_HTMLAudio_currentTimeFix ?\r
 458                                                         X_Timer_now() - this._currentFixStart + this._currentFixBegin :\r
 459                                                         this[ '_rawObject' ].currentTime * 1000 | 0 );\r
 460                         },\r
 461                 /*\r
 462                 http://www.w3schools.com/tags/av_prop_error.asp\r
 463                 1 = MEDIA_ERR_ABORTED - fetching process aborted by user\r
 464                 2 = MEDIA_ERR_NETWORK - error occurred when downloading\r
 465                 3 = MEDIA_ERR_DECODE - error occurred when decoding\r
 466                 4 = MEDIA_ERR_SRC_NOT_SUPPORTED - audio/video not supported\r
 467                 */                      \r
 468                         getActualError : function(){\r
 469                                 return this[ '_rawObject' ].error || 0;\r
 470                         },\r
 471                         \r
 472                         afterUpdateState : function( result ){\r
 473                                 if( result & 3 ){ // seek\r
 474                                         this.actualPlay();\r
 475                                 } else\r
 476                                 if( ( result & 4 ) && X_HTMLAudio_volumeEnabled ){\r
 477                                    this[ '_rawObject' ].volume = this.gain;\r
 478                                 };                              \r
 479                         }\r
 480         \r
 481                 }\r
 482         );\r
 483         \r
 484         X_HTMLAudio && X_Audio_BACKENDS.push(\r
 485                 {\r
 486                         backendID   : 2,\r
 487                         \r
 488                         backendName : 'HTMLAudio',\r
 489                         \r
 490                         canPlay : X_Audio_codecs,\r
 491                 /*\r
 492                  * HTML5 の audio 要素と video 要素でサポートされているメディアフォーマット\r
 493                  * https://developer.mozilla.org/ja/docs/Web/HTML/Supported_media_formats\r
 494                  * \r
 495                  * 主要ブラウザのHTML5 audioタグで使えるファイル形式の再生対応状況を調べてみた\r
 496                  * http://sothis.blog.so-net.ne.jp/2010-10-27\r
 497                  * ダメ元で仕様に含まれていない SHOUTcast もテストしてみました。\r
 498                  * \r
 499                  * IE9 の HTML5 Audio について\r
 500                  * http://kentablog.cluscore.com/2011/05/ie9-html5-audio.html\r
 501                  * 1.Audioオブジェクトを作ることができないので、Audioタグを使う\r
 502                  * 2.クロスドメインアクセスには、「clientaccesspolicy.xml」か「crossdomain.xml」が必要\r
 503                  * 3.wav が不可\r
 504                  * \r
 505                  * IE9でHTML5 autio タグが無効になる\r
 506                  * http://bbs.wankuma.com/index.cgi?mode=al2&namber=64886&KLOG=109\r
 507                  *  IEのバージョン9.0.8112.16421では、Audioオブジェクトのnewも対応してました。\r
 508                  *  createElement等で動的生成すると、よろしくない\r
 509                  * \r
 510                  * media-can-play-wav-audio.html\r
 511                  * https://github.com/adobe/webkit/blob/master/LayoutTests/media/media-can-play-wav-audio.html\r
 512                  * testExpected("audio.canPlayType('audio/wav; codecs=1')", "probably");\r
 513                  * \r
 514                  * HTML5 audioタグ ブラウザ間の違い\r
 515                  * http://wiki.bit-hive.com/tomizoo/pg/HTML5%20audio%A5%BF%A5%B0%20%A5%D6%A5%E9%A5%A6%A5%B6%B4%D6%A4%CE%B0%E3%A4%A4\r
 516                  *  - volume, muted iPhone(iOS4-6)、Android(2.3.6)では動作せず。\r
 517                  *  - FireFox3.6, Android 2.3.6については、src変更後、load()を呼び出さないと切り替わらなかった。iPhoneはload()が不要。\r
 518                  */     \r
 519                         detect : function( proxy, source, ext ){\r
 520                                 proxy[ 'asyncDispatch' ]( { type : X_EVENT_COMPLETE, canPlay : X_Audio_codecs[ ext ] } );\r
 521                         },\r
 522                         \r
 523                         klass : X_HTMLAudio\r
 524                         \r
 525                 } );\r
 526 \r
 527 /*\r
 528  * \r
 529  * howler.js\r
 530  *       codecs = {\r
 531           mp3: !!audioTest.canPlayType('audio/mpeg;').replace(/^no$/, ''),\r
 532           opus: !!audioTest.canPlayType('audio/ogg; codecs="opus"').replace(/^no$/, ''),\r
 533           ogg: !!audioTest.canPlayType('audio/ogg; codecs="vorbis"').replace(/^no$/, ''),\r
 534           wav: !!audioTest.canPlayType('audio/wav; codecs="1"').replace(/^no$/, ''),\r
 535           aac: !!audioTest.canPlayType('audio/aac;').replace(/^no$/, ''),\r
 536           m4a: !!(audioTest.canPlayType('audio/x-m4a;') || audioTest.canPlayType('audio/m4a;') || audioTest.canPlayType('audio/aac;')).replace(/^no$/, ''),\r
 537           mp4: !!(audioTest.canPlayType('audio/x-mp4;') || audioTest.canPlayType('audio/mp4;') || audioTest.canPlayType('audio/aac;')).replace(/^no$/, ''),\r
 538           weba: !!audioTest.canPlayType('audio/webm; codecs="vorbis"').replace(/^no$/, '')\r
 539         };\r
 540  */\r
 541         \r
 542 };\r
 543 \r
 544 \r
 545 \r
 546 \r
 547 \r