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