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. AOSP oggはシークが乱れる m4a, mp3 は優秀\r
  20  * \r
  21  * http://unolabo.boo.jp/archives/2011/06/13-iphone%E3%81%AEaudio%E5%91%A8%E3%82%8A%E3%81%AE%E3%83%A1%E3%83%A2.html\r
  22  * 【JS】iPhoneのAudio周りのメモ iOS4.0 と 4.2 の違い\r
  23  */\r
  24         /*\r
  25          * durationFix\r
  26          *  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
  27          * \r
  28          *   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
  29          *        -> 取得後に pause or 通常再生\r
  30          *   2. touch が必要な場合、タッチイベント内の audio.play() で duration 取得\r
  31          * \r
  32          *  PC Opera12\r
  33          *   1. loadeddata 等では duration が infinity で、再生後の durationchange 時に duration が判明する\r
  34          *   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
  35          *   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
  36          *        -> 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
  37          *        -> opera11、10.54 WinXP はまとも、、、 portable が怪しい??\r
  38          */\r
  39 \r
  40 var\r
  41         X_HTMLAudio,\r
  42         \r
  43         // 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
  44         X_HTMLAudio_endedFixIOS     = X_UA[ 'iOS' ] < 7,\r
  45         // 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
  46         X_HTMLAudio_endedFixAOSP2   = X_UA[ 'AOSP' ] < 3,\r
  47         // Android 3.1 で ended 時に src='';src=src を実施。\r
  48         X_HTMLAudio_endedFixAOSP3   = !X_HTMLAudio_endedFixAOSP2 && X_UA[ 'AOSP' ] < 4,\r
  49         // 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
  50         X_HTMLAudio_endedFixAOSP4   = 4 <= X_UA[ 'AOSP' ],\r
  51         // ended 時に play() を実施\r
  52         X_HTMLAudio_endedFixCWV     = X_UA[ 'ChromeWV' ] || ( X_UA[ 'Blink' ] && X_UA[ 'Android' ] ),\r
  53         \r
  54         // 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
  55         X_HTMLAudio_currentTimeFix  = !!X_UA[ 'OperaMobile' ] || !!X_UA[ 'OperaTablet' ],\r
  56 \r
  57         X_HTMLAudio_volumeFix       = X_UA[ 'Chrome' ],\r
  58         /*\r
  59          * win opera12 volume, mute の変更が2度目以降できない\r
  60          */\r
  61         X_HTMLAudio_volumeEnabled   = !( X_UA[ 'WinPhone' ] && X_UA[ 'IE9' ] ) && !X_UA[ 'Opera' ],\r
  62         // Gecko PC + Android でseek時に再生がしばしば止まる問題の修正\r
  63         X_HTMLAudio_needPlayForSeek = X_UA[ 'iOS' ] || X_UA[ 'Gecko' ],\r
  64         // \r
  65         X_HTMLAudio_pauseFix            = 12 <= X_UA[ 'Opera' ] && 0 < ' XP XPSP2 2003|XP64'.indexOf( X_UA[ 'Windows' ] ), // XP + Opera12 のみ?\r
  66 \r
  67         X_HTMLAudio_need1stTouch        = X_UA[ 'iOS' ] || 4.2 <= X_UA[ 'AOSP' ] || X_UA[ 'ChromeWV' ] || X_UA[ 'WinPhone' ] || ( X_UA[ 'Blink' ] && X_UA[ 'Android' ] ),\r
  68 \r
  69         X_HTMLAudio_playTrigger     = ( X_UA[ 'WinPhone' ] && X_UA[ 'IE9' ] ) ? 'canplay' : X_UA[ 'iOS' ] ? 'suspend' : X_UA[ 'Blink' ] ? 'stalled' : 'canplaythrough',\r
  70 \r
  71         X_HTMLAudio_durationFix     = X_UA[ 'iOS' ] || X_UA[ 'ChromeWV' ] || ( X_UA[ 'WinPhone' ] && X_UA[ 'IE9' ] ) ||\r
  72                                                                 ( X_UA[ 'Windows' ] && 12 <= X_UA[ 'Opera' ] ) || ( X_UA[ 'Blink' ] && X_UA[ 'Android' ] ),\r
  73 \r
  74         X_HTMLAudio_shortPlayFix        = X_UA[ 'AOSP' ]; // Android 4.1.1 でも遭遇\r
  75 \r
  76 if( X_Audio_constructor ){\r
  77         \r
  78         X_HTMLAudio = X_AudioBase[ 'inherits' ](\r
  79                 'X.HTMLAudio',\r
  80                 X_Class.POOL_OBJECT,\r
  81                 {\r
  82                         // 1: canplaythrought|timeupdateに達している、またはdurationFixが終了している\r
  83                         // 2: READY イベント発火済\r
  84                         _readyState       : 0,\r
  85                         _src                      : '',\r
  86                         \r
  87                         // 0:ok\r
  88                         // 1:touch 要求済\r
  89                         // 2:touch による play 済\r
  90                         _touchState       : X_HTMLAudio_need1stTouch ? 1 : 0,\r
  91                         \r
  92                         _currentFixStart  : 0,\r
  93                         _currentFixBegin  : 0,\r
  94 \r
  95                         // 0:durationFix不要 または 完了\r
  96                         // 1:durationFix未着手(touchState=1なら play() に入れる)\r
  97                         // 2:canplay イベント発生 -> play()\r
  98                         // 4:play() 実施済\r
  99                         // 8:duration 取得済\r
 100                         //  :timeupdate イベントで durationFixは完了\r
 101                         _durationFixPhase : X_HTMLAudio_durationFix ? 1 : 0,\r
 102                         _lastCurrentTime  : 0,\r
 103 \r
 104                         _shortPlayFixON   : false,\r
 105                         _shortPlayFixTime : 0,\r
 106                         \r
 107                         _endedFixON               : false,\r
 108                         \r
 109                         'Constructor' : function( disatcher, source, option ){\r
 110                                 var raw;\r
 111                                 \r
 112                                 this.disatcher = disatcher || this;\r
 113                                 this._src          = source;\r
 114                                 \r
 115                                 if( X_HTMLAudio_shortPlayFix ){\r
 116                                         this._shortPlayFixON = X_URL_getEXT( source ) === 'm4a';\r
 117                                 };\r
 118                                 \r
 119                                 this.setState( option );\r
 120 \r
 121                                 if( option[ 'useVideo' ] ){\r
 122                                         raw = document.createElement( 'video' );\r
 123                                         raw.preload                   = 'none'; // auto, metadata, none\r
 124                                         raw.autoplay              = false, // no-auto\r
 125                                         raw.loop                          = false;\r
 126                                         raw.muted                         = false;\r
 127                                         raw.crossorigin       = option[ 'crossorigin' ] || ''; //crossorigin: "anonymous", X.URL.isSameDomain() で切り替え\r
 128                                         raw.style.cssText         = 'position:absolute;bottom:0;left:-50px;width:100px;height:100px;opacity:0;';\r
 129                                         raw.controls              = false;\r
 130                                         raw.WebKitPlaysInline = true;\r
 131                                         X_elmBody.appendChild( raw );\r
 132                                 } else {\r
 133                                         raw = X_TEMP.rawAudio || new X_Audio_constructor( '' );\r
 134                                         \r
 135                                         if( X_TEMP.rawAudio ) delete X_TEMP.rawAudio;\r
 136                                 };\r
 137                                 \r
 138                                 this[ '_rawObject' ] = raw;\r
 139                                 \r
 140                                 this[ 'listen' ]( [\r
 141                                                 X_EVENT_KILL_INSTANCE,\r
 142                                                 X_HTMLAudio_playTrigger,\r
 143                                                 //'loadstart', 'load',\r
 144                                                 'progress', //'error',\r
 145                                                 // 'suspend', 'abort', 'emptied', 'stalled',\r
 146                                                 // 'play', 'pause', 'seeked', 'ratechange', 'volumechange',\r
 147                                                 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough',\r
 148                                                 'playing', 'waiting', 'seeking',\r
 149                                                 'durationchange', 'timeupdate', 'ended' ] );\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_HTMLAudio_endedFixAOSP2 || X_HTMLAudio_endedFixAOSP4 ){\r
 161                                         raw.loop = true; // loop を使えば ended で止まること回避できるかも 但し ended イベントが起きなくなる\r
 162                                 };\r
 163 \r
 164                                 if( X_HTMLAudio_need1stTouch ){\r
 165                                         raw.src = source;\r
 166                                 } else {\r
 167                                         // if( this.autoplay ){\r
 168                                                 raw.preload  = 'auto';\r
 169                                                 raw.autoplay = true; // Android 4.0-4.1.x で必要\r
 170                                                 //raw.autobuffer = true;\r
 171                                         //};\r
 172                                         raw.src = source;\r
 173                                         raw.load(); // Android4.1.1 HTL21 では必要!\r
 174                                 };\r
 175                         },\r
 176                         \r
 177                         onDebug : function( e ){\r
 178                                 this.disatcher[ 'dispatch' ]( {\r
 179                                         type       : X_EVENT_DEBUG,\r
 180                                         'rawEvent' : e.type,\r
 181                                         'current'  : this[ '_rawObject' ].currentTime,\r
 182                                         duration   : this[ '_rawObject' ].duration } );\r
 183                         },\r
 184                         \r
 185                         handleEvent : function( e ){\r
 186                                 var raw    = this[ '_rawObject' ],\r
 187                                         actualEnded = e.type === 'ended',\r
 188                                         ended       = actualEnded,\r
 189                                         i, l, buf, time,\r
 190                                         ready,\r
 191                                         eventType, duration, end, now;\r
 192                                 \r
 193                                 if( !raw ) return;\r
 194 \r
 195                                 //e.type !== 'timeupdate' && console.log( ' > ' + e.type );\r
 196                                         \r
 197                                 switch( e.type ){\r
 198 \r
 199                                         case X_EVENT_KILL_INSTANCE :\r
 200                                                 this.playing && this.actualPause();\r
 201                                                 \r
 202                                                 // 【javascript】モバイル向けブラウザでも音を鳴らしたい【WebAudio】\r
 203                                                 // http://ingaouhou.com/archives/3633\r
 204                                                 // ・使い終わったインスタンスはload()しておくとやや安定\r
 205                                                 raw.src = '';\r
 206                                                 raw.load();\r
 207                                                 \r
 208                                                 // removeChild for video\r
 209                                                 break;\r
 210 \r
 211                                         //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
 212                                                 //break;\r
 213                                         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
 214                                                 // console.log( e.loaded + ' ' + e.total * 100 + '%' );\r
 215                                                 // iem9 で常に0 raw.networkState;\r
 216                                                 // 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
 217                                                 if( !( X_UA[ 'Opera' ] && X_UA[ 'Android' ] ) && !( X_UA[ 'WinPhones' ] && X_UA[ 'IE9' ] ) && this.duration ){\r
 218                                                         buf  = raw.buffered;\r
 219                                                         time = 0;\r
 220                                                         for( i = 0, l = buf.length; i < l; ++i ){\r
 221                                                                 time += buf[ 'end' ]( i ) - buf[ 'start' ]( i );\r
 222                                                         };\r
 223                                                         this.disatcher[ 'dispatch' ]( { type : X_EVENT_PROGRESS, 'percent' : time * 1000 / this.duration } );\r
 224                                                 };\r
 225                                                 break;\r
 226                                         \r
 227                                         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
 228                                         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
 229                                                 if( !this._endedFixON && !X_HTMLAudio_durationFix && !X_HTMLAudio_need1stTouch ){\r
 230                                                         this._readyState |= 1;\r
 231                                                 };\r
 232                                         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
 233                                                 if( this._durationFixPhase === 1 && !X_HTMLAudio_need1stTouch ){ // PC Opera12 用 durationFix\r
 234                                                         this._durationFixPhase = 2;\r
 235                                                         this.actualPlay();\r
 236                                                         raw.currentTime = 0; // Win8 + Opera12 で必要\r
 237                                                 };\r
 238                                                 if( this._endedFixON ){\r
 239                                                         console.log( '▽ onEndedFix の終了 @' + e.type  );\r
 240                                                         this._endedFixON = false;\r
 241                                                         this.actualPlay();\r
 242                                                 };\r
 243                                         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
 244                                         case 'durationchange' : //  duration属性が更新された場合に発生\r
 245                                                 if( !this.duration || this.duration !== raw.duration * 1000 ){ // Blink28 duration が変わる\r
 246                                                         duration = raw.duration;\r
 247                                                 };\r
 248                                                 break;\r
 249         \r
 250                                         // 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
 251                                         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
 252                                                 if( this._durationFixPhase === 8 ){\r
 253                                                         this._durationFixPhase = 0;\r
 254                                                         this._readyState |= 1;\r
 255                                                 } else\r
 256                                                 if( this._durationFixPhase === 4 ){ // 1 or 2\r
 257                                                         duration = raw.duration;\r
 258                                                         eventType = X_EVENT_MEDIA_WAITING;\r
 259                                                 } else\r
 260                                                 if( this._touchState === 3 && !X_HTMLAudio_durationFix ){\r
 261                                                         this._touchState  = 0;\r
 262                                                         this._readyState |= 1;\r
 263                                                 } else\r
 264                                                 if( ( now = this.getActualCurrentTime() ) === this._lastCurrentTime ){\r
 265                                                         eventType = X_EVENT_MEDIA_WAITING;\r
 266                                                 } else\r
 267                                                 if( this.playing ){\r
 268                                                         end = X_Audio_getEndTime( this ) + this._shortPlayFixTime;\r
 269                                                         //console.log( now + ' / ' + end );\r
 270                                                         if( ( 0 + end <= 0 + now ) || // 0+ なぜか iem9 で必要,,,\r
 271                                                                 ( now < this._lastCurrentTime ) ){ // loop した場合\r
 272                                                                 if( this.autoLoop ){\r
 273                                                                         console.log( '☆★☆ 曲の最後に到達 @timeupdate now-end:' + ( now - end ) );\r
 274                                                                         ended = true;\r
 275                                                                         //if( X_HTMLAudio_endedFixIOS ) actualEnded = true;\r
 276                                                                 } else {\r
 277                                                                         this.actualPause();\r
 278                                                                         eventType = X_EVENT_MEDIA_ENDED;\r
 279                                                                 };\r
 280                                                         } else {\r
 281                                                                 eventType = X_EVENT_MEDIA_PLAYING;\r
 282                                                         };\r
 283                                                         this._lastCurrentTime = now;\r
 284                                                 };\r
 285                                                 break;\r
 286         \r
 287                                         //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
 288                                                 // Android2 で ready 扱い?\r
 289                                         //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
 290                                                 // iOS で ready 扱い\r
 291                                         //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
 292                                         //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
 293                                         //      break;\r
 294                                                 \r
 295                                         //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
 296                                                 // Opera12 src = '' で error が発生、無視する\r
 297                                                 // eventType = X_EVENT_ERROR;\r
 298                                                 //break;\r
 299                                                 \r
 300                                         case 'playing' :                //      再生が開始された場合に発生\r
 301                                                 if( X_HTMLAudio_volumeFix ){\r
 302                                                         raw.volume = this.gain;\r
 303                                                 };\r
 304                                                 //if( X_HTMLAudio_currentTimeFix && !this._currentFixStart ){\r
 305                                                         //this._currentFixStart = X_Timer_now(); // 正確な再生開始時間に補正\r
 306                                                 //};\r
 307                                                 eventType = !this._durationFixPhase && !this._endedFixON ? X_EVENT_MEDIA_PLAYING : X_EVENT_MEDIA_WAITING;\r
 308                                         //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
 309                                         //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
 310                                         //case 'seeked' : \r
 311                                         //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
 312                                         //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
 313                                                 break;\r
 314                                         \r
 315                                         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
 316                                                 eventType = X_EVENT_MEDIA_WAITING;\r
 317                                                 break;\r
 318                                         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
 319                                                 eventType = X_EVENT_MEDIA_SEEKING;\r
 320                                                 break;\r
 321                                 };\r
 322                                 \r
 323                                 // duration は Infinity, NaN, 0 の場合があるため、これを除外する\r
 324                                 // chrome18 for Android は duration = 100 の間はシークができない? 28 は可能\r
 325                                 if( 0 < duration && X_Type_isFinite( duration ) && duration !== 100 ){\r
 326                                         this.duration = duration * 1000;\r
 327 \r
 328                                         if( this._durationFixPhase === 4 ){\r
 329                                                 console.log( '▼ DurationFix の終了 @' + e.type );\r
 330                                                 this._durationFixPhase = 8;\r
 331                                                 \r
 332                                                 if( this.autoplay || this._playReserved ){\r
 333                                                         console.log( '☆ 再生 <- DurationFix の終了' );\r
 334                                                         this.actualPlay();\r
 335                                                 } else\r
 336                                                 if( X_HTMLAudio_pauseFix ){\r
 337                                                         console.log( '☆ PAUSE <- DurationFix の終了' );\r
 338                                                         this.actualPause();\r
 339                                                 };\r
 340                                         } else\r
 341                                         if( this._durationFixPhase & 3 ){ // === 1 | 2\r
 342                                                 this._durationFixPhase = 8;\r
 343                                         };                                      \r
 344                                 };\r
 345 \r
 346                                 //\r
 347                                 if( this._touchState === 1 ){\r
 348                                         if( e.type === X_HTMLAudio_playTrigger ){\r
 349                                                 this._touchState = 2;\r
 350                                                 this.disatcher[ 'asyncDispatch' ]( X_EVENT_MEDIA_TOUCH_FOR_LOAD );                                              \r
 351                                         };\r
 352                                 } else\r
 353                                 if( ended ){\r
 354                                         if( this.autoLoop ){\r
 355                                                 if( !( this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){\r
 356                                                         this.looped = true;\r
 357                                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );\r
 358                                                         this.actualPlay( X_HTMLAudio_endedFixCWV && actualEnded, X_HTMLAudio_endedFixAOSP3 && actualEnded );\r
 359                                                 };\r
 360                                         } else {\r
 361                                                 this.seekTime = 0;\r
 362                                                 delete this.playing;\r
 363                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );\r
 364                                         };\r
 365                                 } else\r
 366                                 if( this._readyState === 1 && this.duration ){\r
 367                                         this._readyState = 2;\r
 368                                         this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );\r
 369                                         console.log( '> Audio Loaded!! ' + e.type + ' d:' + ( this.duration | 0 ) );\r
 370                                 } else\r
 371                                 if( eventType ){\r
 372                                         this.disatcher[ 'dispatch' ]( eventType );\r
 373                                 };\r
 374                         },\r
 375 \r
 376                         actualPlay : function( forcePlay, forceReload ){\r
 377                                 var raw = this[ '_rawObject' ],\r
 378                                         e, begin, end;\r
 379 \r
 380                                 if( !raw ) return;\r
 381                                 \r
 382                                 this._playReserved = true;\r
 383                                 \r
 384                                 if( X_HTMLAudio_pauseFix ){\r
 385                                         if( !raw.src ){ // X_HTMLAudio_pauseFix によって src が空になっている\r
 386                                                 console.log( '○ 削除された audio.src の復帰' );\r
 387                                                 raw.src = this._src;\r
 388                                                 return;\r
 389                                         };\r
 390                                         if( this._durationFixPhase < 2 ){\r
 391                                                 return;\r
 392                                         };              \r
 393                                 };\r
 394 \r
 395                                 if( this._touchState === 2 ){\r
 396                                         e = X_EventDispatcher_CURRENT_EVENTS[ X_EventDispatcher_CURRENT_EVENTS.length - 1 ];\r
 397                                         if( !e || !e[ 'pointerType' ] ){\r
 398                                                 alert( 'タッチイベント以外での play! ' + ( e ? e.type : '' ) );\r
 399                                                 return;\r
 400                                         };\r
 401                                         this._touchState = 3;\r
 402                                 } else\r
 403                                 if( this._readyState !== 2 && this._durationFixPhase < 2 ){\r
 404                                         return;\r
 405                                 };\r
 406                                 \r
 407                                 delete this._playReserved;\r
 408                                 \r
 409                                 if( this._durationFixPhase & 3 ){ // 1 or 2\r
 410                                         console.log( '▲ DurationFix の開始' );\r
 411                                         this._durationFixPhase = 4;\r
 412                                 };\r
 413 \r
 414                                 end   = X_Audio_getEndTime( this );\r
 415                                 begin = X_Audio_getStartTime( this, end, true );\r
 416 \r
 417                                 this._lastCurrentTime = begin / 1000;\r
 418 \r
 419                                 if( this._shortPlayFixON ){\r
 420                                         this._shortPlayFixTime = ( 1000 < end - begin ) ? 200 : 400;\r
 421                                         if( this.duration < end + this._shortPlayFixTime ){\r
 422                                                 this._shortPlayFixTime = this.duration - end;\r
 423                                         };\r
 424                                 };\r
 425 \r
 426                                 if( this._endedFixON ){\r
 427                                         console.log( '☆ audio.play をスキップ ' + begin + ' -> ' + end + ' crt:' + ( raw.currentTime | 0 ) );\r
 428                                 } else {\r
 429                                         if( !this.playing ){\r
 430                                                 if( X_HTMLAudio_volumeFix ){\r
 431                                                         raw.volume = 0;\r
 432                                                 } else {\r
 433                                                         raw.volume = X_HTMLAudio_volumeEnabled ? this.gain : 1;\r
 434                                                 };\r
 435                                                 raw.play();\r
 436                                                 this.playing = true;\r
 437                                         } else\r
 438                                         if( X_HTMLAudio_needPlayForSeek || forcePlay ){\r
 439                                                 raw.play();\r
 440                                         };\r
 441                                         \r
 442                                         //http://himaxoff.blog111.fc2.com/blog-entry-97.html\r
 443                                         //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
 444                                         //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
 445 \r
 446                                         // iOS で duration が 0 の時に触ると error\r
 447                                         // 0 or 8\r
 448                                         if( !( this._durationFixPhase % 8 ) && this.duration ) raw.currentTime = this._lastCurrentTime;\r
 449 \r
 450                                         console.log( '[HTMLAudio] play ' + begin + ' -> ' + end + ' crt:' + ( raw.currentTime | 0 ) + ' last:' + this._lastCurrentTime );\r
 451 \r
 452                                         if( forceReload ){\r
 453                                                 this.playing     = false;\r
 454                                                 this._endedFixON = true;\r
 455                                                 raw.src = this._src;\r
 456                                                 console.log( '△ onEndedFix の開始' );\r
 457                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_WAITING );\r
 458                                         };\r
 459                                 };\r
 460 \r
 461                                 if( X_HTMLAudio_currentTimeFix ){\r
 462                                         this._currentFixBegin = begin;\r
 463                                         this._currentFixStart = X_Timer_now();\r
 464                                 };\r
 465                         },\r
 466                         \r
 467                         actualPause : function(){\r
 468                                 var raw = this[ '_rawObject' ];\r
 469                                 \r
 470                                 console.log( '[HTMLAudio] pause' );\r
 471 \r
 472                                 delete this._currentFixStart;\r
 473 \r
 474                                 !raw.error && raw.pause();\r
 475                                 \r
 476                                 if( X_HTMLAudio_pauseFix ){\r
 477                                         raw.src = '';\r
 478                                         if( X_HTMLAudio_durationFix ){\r
 479                                                 delete this._durationFixPhase;\r
 480                                         };\r
 481                                 };\r
 482                                 delete this.playing;\r
 483                         },\r
 484                         \r
 485                         getActualCurrentTime : function(){\r
 486                                 return ( X_HTMLAudio_currentTimeFix ?\r
 487                                                         X_Timer_now() - this._currentFixStart + this._currentFixBegin :\r
 488                                                         this[ '_rawObject' ].currentTime * 1000 | 0 );\r
 489                         },\r
 490                 /*\r
 491                 http://www.w3schools.com/tags/av_prop_error.asp\r
 492                 1 = MEDIA_ERR_ABORTED - fetching process aborted by user\r
 493                 2 = MEDIA_ERR_NETWORK - error occurred when downloading\r
 494                 3 = MEDIA_ERR_DECODE - error occurred when decoding\r
 495                 4 = MEDIA_ERR_SRC_NOT_SUPPORTED - audio/video not supported\r
 496                 */                      \r
 497                         getActualError : function(){\r
 498                                 return this[ '_rawObject' ].error || 0;\r
 499                         },\r
 500                         \r
 501                         afterUpdateState : function( result ){\r
 502                                 if( result & 3 ){ // seek\r
 503                                         this.actualPlay();\r
 504                                 } else\r
 505                                 if( ( result & 4 ) && X_HTMLAudio_volumeEnabled ){\r
 506                                    this[ '_rawObject' ].volume = this.gain;\r
 507                                 };                              \r
 508                         }\r
 509         \r
 510                 }\r
 511         );\r
 512         \r
 513         X_HTMLAudio && X_Audio_BACKENDS.push(\r
 514                 {\r
 515                         backendID   : 2,\r
 516                         \r
 517                         backendName : 'HTMLAudio',\r
 518                         \r
 519                         canPlay : X_Audio_codecs,\r
 520                 /*\r
 521                  * 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
 522                  * https://developer.mozilla.org/ja/docs/Web/HTML/Supported_media_formats\r
 523                  * \r
 524                  * 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
 525                  * http://sothis.blog.so-net.ne.jp/2010-10-27\r
 526                  * 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
 527                  * \r
 528                  * IE9 の HTML5 Audio について\r
 529                  * http://kentablog.cluscore.com/2011/05/ie9-html5-audio.html\r
 530                  * 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
 531                  * 2.クロスドメインアクセスには、「clientaccesspolicy.xml」か「crossdomain.xml」が必要\r
 532                  * 3.wav が不可\r
 533                  * \r
 534                  * IE9でHTML5 autio タグが無効になる\r
 535                  * http://bbs.wankuma.com/index.cgi?mode=al2&namber=64886&KLOG=109\r
 536                  *  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
 537                  *  createElement等で動的生成すると、よろしくない\r
 538                  * \r
 539                  * media-can-play-wav-audio.html\r
 540                  * https://github.com/adobe/webkit/blob/master/LayoutTests/media/media-can-play-wav-audio.html\r
 541                  * testExpected("audio.canPlayType('audio/wav; codecs=1')", "probably");\r
 542                  * \r
 543                  * HTML5 audioタグ ブラウザ間の違い\r
 544                  * 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
 545                  *  - volume, muted iPhone(iOS4-6)、Android(2.3.6)では動作せず。\r
 546                  *  - 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
 547                  */     \r
 548                         detect : function( proxy, source, ext ){\r
 549                                 proxy[ 'asyncDispatch' ]( { type : X_EVENT_COMPLETE, canPlay : X_Audio_codecs[ ext ] } );\r
 550                         },\r
 551                         \r
 552                         klass : X_HTMLAudio\r
 553                         \r
 554                 } );\r
 555 \r
 556 /*\r
 557  * \r
 558  * howler.js\r
 559  *       codecs = {\r
 560           mp3: !!audioTest.canPlayType('audio/mpeg;').replace(/^no$/, ''),\r
 561           opus: !!audioTest.canPlayType('audio/ogg; codecs="opus"').replace(/^no$/, ''),\r
 562           ogg: !!audioTest.canPlayType('audio/ogg; codecs="vorbis"').replace(/^no$/, ''),\r
 563           wav: !!audioTest.canPlayType('audio/wav; codecs="1"').replace(/^no$/, ''),\r
 564           aac: !!audioTest.canPlayType('audio/aac;').replace(/^no$/, ''),\r
 565           m4a: !!(audioTest.canPlayType('audio/x-m4a;') || audioTest.canPlayType('audio/m4a;') || audioTest.canPlayType('audio/aac;')).replace(/^no$/, ''),\r
 566           mp4: !!(audioTest.canPlayType('audio/x-mp4;') || audioTest.canPlayType('audio/mp4;') || audioTest.canPlayType('audio/aac;')).replace(/^no$/, ''),\r
 567           weba: !!audioTest.canPlayType('audio/webm; codecs="vorbis"').replace(/^no$/, '')\r
 568         };\r
 569  */\r
 570         \r
 571 };\r
 572 \r
 573 \r
 574 \r
 575 \r
 576 \r