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         /*\r
  22          * durationFix\r
  23          *  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
  24          * \r
  25          *   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
  26          *        -> 取得後に pause or 通常再生\r
  27          *   2. touch が必要な場合、タッチイベント内の audio.play() で duration 取得\r
  28          * \r
  29          *  PC Opera12\r
  30          *   1. loadeddata 等では duration が infinity で、再生後の durationchange 時に duration が判明する\r
  31          *   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
  32          *   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
  33          *        -> 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
  34          *        -> opera11、10.54 WinXP はまとも、、、 portable が怪しい??\r
  35          */\r
  36 \r
  37 var\r
  38         X_HTMLAudio,\r
  39         \r
  40         // 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
  41         X_HTMLAudio_endedFixIOS     = X_UA[ 'iOS' ] < 7,\r
  42         // 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
  43         X_HTMLAudio_endedFixAOSP2   = X_UA[ 'AOSP' ] < 3,\r
  44         // Android 3.1 で ended 時に src='';src=src を実施。\r
  45         X_HTMLAudio_endedFixAOSP3   = !X_HTMLAudio_endedFixAOSP2 && X_UA[ 'AOSP' ] < 4,\r
  46         // 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
  47         X_HTMLAudio_endedFixAOSP4   = 4 <= X_UA[ 'AOSP' ],\r
  48         // ended 時に play() を実施\r
  49         X_HTMLAudio_endedFixCWV     = X_UA[ 'ChromeWV' ] || ( X_UA[ 'Blink' ] && X_UA[ 'Android' ] ),\r
  50         \r
  51         // 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
  52         X_HTMLAudio_currentTimeFix  = !!X_UA[ 'OperaMobile' ] || !!X_UA[ 'OperaTablet' ],\r
  53 \r
  54         X_HTMLAudio_volumeFix       = X_UA[ 'Chrome' ],\r
  55         /*\r
  56          * win opera12 volume, mute の変更が2度目以降できない\r
  57          */\r
  58         X_HTMLAudio_volumeEnabled   = !( X_UA[ 'WinPhone' ] && X_UA[ 'IE9' ] ) && !X_UA[ 'Opera' ],\r
  59         // Gecko PC + Android でseek時に再生がしばしば止まる問題の修正\r
  60         X_HTMLAudio_needPlayForSeek = X_UA[ 'Gecko' ],\r
  61         // \r
  62         X_HTMLAudio_pauseFix            = ( X_UA[ 'Windows' ] && 12 <= X_UA[ 'Opera' ] && 0 < ' XP XPSP2 2003|XP64'.indexOf( X_UA[ 'Windows' ] ) ), // XP + Opera12 のみ?\r
  63 \r
  64         X_HTMLAudio_need1stTouch        = X_UA[ 'iOS' ] || 4 <= X_UA[ 'AOSP' ] || X_UA[ 'ChromeWV' ] || X_UA[ 'WinPhone' ] || ( X_UA[ 'Blink' ] && X_UA[ 'Android' ] ),\r
  65         \r
  66         X_HTMLAudio_playTrigger     = ( X_UA[ 'WinPhone' ] && X_UA[ 'IE9' ] ) ? 'canplay' : X_UA[ 'iOS' ] ? 'suspend' : X_UA[ 'Blink' ] ? 'stalled' : 'canplaythrough',\r
  67         \r
  68         X_HTMLAudio_durationFix     = X_UA[ 'iOS' ] || X_UA[ 'ChromeWV' ] || ( X_UA[ 'Windows' ] && 12 <= X_UA[ 'Opera' ] ) || ( X_UA[ 'WinPhone' ] && X_UA[ 'IE9' ] ),\r
  69         \r
  70         X_HTMLAudio_shortPlayFix        = X_UA[ 'AOSP' ]; // Android 4.1.1 でも遭遇\r
  71 \r
  72 if( X_Audio_constructor ){\r
  73         \r
  74         X_HTMLAudio = X_AudioBase[ 'inherits' ](\r
  75                 'X.HTMLAudio',\r
  76                 X_Class.POOL_OBJECT,\r
  77                 {\r
  78                         _closed               : true,\r
  79                         _loaded               : false,\r
  80                         _ready            : false,              \r
  81                         _src                      : '',\r
  82                         \r
  83                         _touchRequested   : false,\r
  84                         _touched          : false,\r
  85                         \r
  86                         _currentFixStart  : 0,\r
  87                         _currentFixBegin  : 0,\r
  88 \r
  89                         _durationFixPhase : X_HTMLAudio_durationFix ? 1 : 0,\r
  90                         _durationFixSkip  : X_HTMLAudio_durationFix && !X_HTMLAudio_need1stTouch,\r
  91                         _lastCurrentTime  : 0,\r
  92 \r
  93                         _shortPlayFixON   : false,\r
  94                         _shortPlayFixTime : 0,\r
  95                         \r
  96                         _endedFixON               : false,\r
  97                         \r
  98                         'Constructor' : function( disatcher, source, option ){\r
  99                                 var raw;\r
 100                                 \r
 101                                 this.disatcher = disatcher || this;\r
 102                                 this._closed   = false;\r
 103                                 this._src          = source;\r
 104                                 \r
 105                                 if( X_HTMLAudio_shortPlayFix ){\r
 106                                         this._shortPlayFixON = X_URL_getEXT( source ) === 'm4a';\r
 107                                 };\r
 108                                 \r
 109                                 this.setState( option );\r
 110 \r
 111                                 if( option[ 'useVideo' ] ){\r
 112                                         raw = document.createElement( 'video' );\r
 113                                         raw.preload                   = 'none'; // auto, metadata, none\r
 114                                         raw.autoplay              = false, // no-auto\r
 115                                         raw.loop                          = false;\r
 116                                         raw.muted                         = false;\r
 117                                         raw.crossorigin       = option[ 'crossorigin' ] || ''; //crossorigin: "anonymous", X.URL.isSameDomain() で切り替え\r
 118                                         raw.style.cssText         = 'position:absolute;bottom:0;left:-50px;width:100px;height:100px;opacity:0;';\r
 119                                         raw.controls              = false;\r
 120                                         raw.WebKitPlaysInline = true;\r
 121                                         raw.src                       = source;\r
 122                                         X_elmBody.appendChild( raw );\r
 123                                 } else {\r
 124                                         raw = X_TEMP.rawAudio || new X_Audio_constructor( source );\r
 125                                         // X_Doc_create( 'audio', { src : source } )[ 'appendTo' ]( X.Doc.body );\r
 126                                         raw.autobuffer = raw.autoplay = false;\r
 127                                 };\r
 128                                 \r
 129                                 this[ '_rawObject' ] = raw;\r
 130                                 \r
 131                                 this[ 'listen' ]( [\r
 132                                                 X_EVENT_KILL_INSTANCE,\r
 133                                                 X_HTMLAudio_playTrigger,\r
 134                                                 //'loadstart', 'load',\r
 135                                                 'progress', 'error',\r
 136                                                 // 'suspend', 'abort', 'emptied', 'stalled',\r
 137                                                 // 'play', 'pause', 'seeked', 'ratechange', 'volumechange',\r
 138                                                 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough',\r
 139                                                 'playing', 'waiting', 'seeking',\r
 140                                                 'durationchange', 'timeupdate', 'ended' ] );\r
 141 \r
 142 \r
 143                                 this[ 'listen' ]( [\r
 144                                                 'loadstart', 'load',\r
 145                                                 'progress', 'error',\r
 146                                                 'suspend', 'abort', 'emptied', 'stalled',\r
 147                                                 'play', 'pause', 'seeked', 'ratechange', 'volumechange',\r
 148                                                 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough',\r
 149                                                 'playing', 'waiting', 'seeking',\r
 150                                                 'durationchange', 'timeupdate', 'ended' ], this.onDebug );\r
 151 \r
 152                                 if( X_TEMP.rawAudio ){\r
 153                                         raw.src = source;\r
 154                                         X_UA[ 'AOSP' ] < 3 && raw.load();\r
 155                                         delete X_TEMP.rawAudio;\r
 156                                 };\r
 157                         },\r
 158                         \r
 159                         onDebug : function( e ){\r
 160                                 this.disatcher[ 'dispatch' ]( {\r
 161                                         type       : X_EVENT_DEBUG,\r
 162                                         'rawEvent' : e.type,\r
 163                                         current    : this.getActualCurrentTime() | 0,\r
 164                                         duration   : this.duration | 0 } );\r
 165                         },\r
 166                         \r
 167                         handleEvent : function( e ){\r
 168                                 var raw    = this[ '_rawObject' ],\r
 169                                         actualEnded = e.type === 'ended',\r
 170                                         ended       = actualEnded,\r
 171                                         ready,\r
 172                                         eventType, duration, end, now;\r
 173                                 \r
 174                                 // global に公開\r
 175                                 //window[ '__rawAudio' ] = this[ '_rawObject' ];\r
 176                                 \r
 177                                 e.type !== 'timeupdate' && console.log( ' > ' + e.type );\r
 178                                         \r
 179                                 switch( e.type ){\r
 180 \r
 181                                         case X_EVENT_KILL_INSTANCE :\r
 182                                                 // 【javascript】モバイル向けブラウザでも音を鳴らしたい【WebAudio】\r
 183                                                 // http://ingaouhou.com/archives/3633\r
 184                                                 // ・使い終わったインスタンスはload()しておくとやや安定\r
 185                                                 this.playing && this.actualPause();\r
 186                                                 delete this._closed;\r
 187                                                 delete this._loaded;\r
 188                                                 \r
 189                                                 raw.src = '';\r
 190                                                 raw.load();\r
 191                                                 \r
 192                                                 // removeChild for video\r
 193                                                 break;\r
 194 \r
 195                                         //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
 196                                                 //break;\r
 197                                         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
 198                                                 // console.log( e.loaded + ' ' + e.total * 100 + '%' );\r
 199                                                 // iem9 で常に0 raw.networkState;\r
 200                                                 // 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
 201                                                 //console.log( 'buffered.end ' + raw.buffered && raw.buffered.end(0) ); \r
 202                                                 break;\r
 203                                         \r
 204                                         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
 205                                         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
 206                                                 if( !this._endedFixON ){\r
 207                                                         ready = true;\r
 208                                                 };\r
 209                                         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
 210                                                 if( X_HTMLAudio_durationFix && !X_HTMLAudio_need1stTouch && this._durationFixPhase === 1 ){\r
 211                                                         console.log( '▲ DurationFix の開始 @' + e.type );\r
 212                                                         this._durationFixPhase = 2;\r
 213                                                         raw.play();\r
 214                                                         raw.currentTime = 0; // 必要！\r
 215                                                 };\r
 216                                                 if( this._endedFixON ){\r
 217                                                         console.log( '▽ onEndedFix の終了 @' + e.type  );\r
 218                                                         this._endedFixON = false;\r
 219                                                         this.actualPlay();\r
 220                                                 };\r
 221                                         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
 222                                         case 'durationchange' : //  duration属性が更新された場合に発生\r
 223                                                 if( !this.duration || this.duration !== raw.duration * 1000 ){ // Blink28 duration が変わる\r
 224                                                         duration = raw.duration;\r
 225                                                 };\r
 226                                                 break;\r
 227         \r
 228                                         // 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
 229                                         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
 230                                                 if( this._durationFixPhase & 3 ){ // 1 or 2\r
 231                                                         duration = raw.duration;\r
 232                                                 } else\r
 233                                                 if( this.getActualCurrentTime() === this._lastCurrentTime ){\r
 234                                                         eventType = X_EVENT_MEDIA_WAITING;\r
 235                                                 } else {\r
 236                                                         this._lastCurrentTime = this.getActualCurrentTime();\r
 237 \r
 238                                                         if( this.playing ){\r
 239                                                                 end = X_Audio_getEndTime( this ) + this._shortPlayFixTime;\r
 240                                                                 now = this.getActualCurrentTime();\r
 241                                                                 //console.log( now + ' / ' + end );\r
 242                                                                 if( 0 + end <= 0 + now ){ // 0+ なぜか iem9 で必要,,,\r
 243                                                                         if( this.autoLoop ){\r
 244                                                                                 console.log( '☆★☆ 曲の最後に到達 @timeupdate now-end:' + ( now - end ) );\r
 245                                                                                 ended = true;\r
 246                                                                                 if( X_HTMLAudio_endedFixIOS ) actualEnded = true;\r
 247                                                                         } else {\r
 248                                                                                 this.actualPause();\r
 249                                                                                 eventType = X_EVENT_MEDIA_ENDED;\r
 250                                                                         };\r
 251                                                                 } else {\r
 252                                                                         eventType = X_EVENT_MEDIA_PLAYING;\r
 253                                                                 };\r
 254                                                         };\r
 255                                                 };\r
 256                                                 break;\r
 257         \r
 258                                         //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
 259                                                 // Android2 で ready 扱い?\r
 260                                         //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
 261                                                 // iOS で ready 扱い\r
 262                                         //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
 263                                         //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
 264                                         //      break;\r
 265                                                 \r
 266                                         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
 267                                                 // Opera12 src = '' で error が発生、無視する\r
 268                                                 // eventType = X_EVENT_ERROR;\r
 269                                                 break;\r
 270                                                 \r
 271                                         case 'playing' :                //      再生が開始された場合に発生\r
 272                                                 if( X_HTMLAudio_volumeFix ){\r
 273                                                         raw.volume = this.gain;\r
 274                                                 };\r
 275                                                 if( X_HTMLAudio_currentTimeFix && !this._currentFixStart ){\r
 276                                                         //this._currentFixStart = X_Timer_now(); // 正確な再生開始時間に補正\r
 277                                                 };\r
 278                                                 eventType = !this._durationFixSkip && !this._endedFixON ? X_EVENT_MEDIA_PLAYING : X_EVENT_MEDIA_WAITING;\r
 279                                         //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
 280                                         //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
 281                                         //case 'seeked' : \r
 282                                         //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
 283                                         //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
 284                                                 break;\r
 285                                         \r
 286                                         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
 287                                                 eventType = X_EVENT_MEDIA_WAITING;\r
 288                                                 break;\r
 289                                         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
 290                                                 eventType = X_EVENT_MEDIA_SEEKING;\r
 291                                                 break;\r
 292                                 };\r
 293                                 \r
 294                                 // duration は Infinity, NaN, 0 の場合があるため、これを除外する\r
 295                                 if( 0 < duration && X_Type_isFinite( duration ) ){\r
 296                                         this.duration = duration * 1000;\r
 297 \r
 298                                         if( this._durationFixPhase === 2 ){\r
 299                                                 console.log( '▼ DurationFix の終了 @' + e.type );\r
 300                                                 this._durationFixPhase = 4;\r
 301                                                 \r
 302                                                 ready = true;\r
 303                                                 \r
 304                                                 if( this.autoplay || this._loaded ){\r
 305                                                         console.log( '☆ 再生 <- DurationFix の終了' );\r
 306                                                         this._durationFixSkip = false;\r
 307                                                         this.actualPlay();\r
 308                                                 } else\r
 309                                                 if( X_HTMLAudio_pauseFix ){\r
 310                                                         console.log( '☆ PAUSE <- DurationFix の終了' );\r
 311                                                         //raw.src = '';\r
 312                                                         //raw.load();\r
 313                                                         this.actualPause();                             \r
 314                                                 };\r
 315                                         } else\r
 316                                         if( this._durationFixPhase ){\r
 317                                                 this._durationFixPhase = 4;\r
 318                                         };                                      \r
 319                                 };\r
 320 \r
 321                                 this._loaded  = this._loaded || ready;\r
 322 \r
 323                                 //\r
 324                                 if( X_HTMLAudio_need1stTouch && !this._touchRequested ){\r
 325                                         if( e.type === X_HTMLAudio_playTrigger ){\r
 326                                                 this._touchRequested = true;\r
 327                                                 this.disatcher[ 'asyncDispatch' ]( X_EVENT_MEDIA_CAN_TOUCH_LOAD );                                              \r
 328                                         };\r
 329                                 } else\r
 330                                 if( ended ){\r
 331                                         if( !this._closed && this.autoLoop ){\r
 332                                                 if( !( this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_BEFORE_LOOP ) & X_CALLBACK_PREVENT_DEFAULT ) ){\r
 333                                                         this.looped = true;\r
 334                                                         this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_LOOPED );\r
 335                                                         ( 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
 336                                                         this.actualPlay(\r
 337                                                                 ( X_HTMLAudio_endedFixAOSP4 || X_HTMLAudio_endedFixCWV || X_HTMLAudio_endedFixIOS ) && actualEnded,\r
 338                                                                 ( X_HTMLAudio_endedFixAOSP3 || X_HTMLAudio_endedFixAOSP2 ) && actualEnded );\r
 339                                                 };\r
 340                                         } else {\r
 341                                                 this.seekTime = 0;\r
 342                                                 delete this.playing;\r
 343                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_ENDED );\r
 344                                         };\r
 345                                 } else\r
 346                                 if( this._loaded && this.duration && !this._ready ){\r
 347                                         this._ready = true;\r
 348                                         this.disatcher[ 'asyncDispatch' ]( X_EVENT_READY );\r
 349                                         this.autoplay && !X_WebAudio_need1stTouch && X_Timer_once( 16, this, this.play );\r
 350                                         console.log( '> Audio Loaded!! ' + e.type + ' d:' + ( this.duration | 0 ) );\r
 351                                 } else\r
 352                                 if( eventType ){\r
 353                                         this.disatcher[ 'dispatch' ]( eventType );\r
 354                                         eventType === X_EVENT_ERROR && this[ 'kill' ]();\r
 355                                 };\r
 356                         },\r
 357 \r
 358                         actualPlay : function( forcePlay, forceReload ){\r
 359                                 var raw = this[ '_rawObject' ],\r
 360                                         e, begin, end;\r
 361                                 \r
 362                                 // もし kill 後に autoplayTimer で呼ばれても、_closed==true なので平気\r
 363                                 if( this._closed ) return;\r
 364                                 \r
 365                                 \r
 366                                 if( !raw.src ){ // X_HTMLAudio_pauseFix によって src が空になっている\r
 367                                         console.log( '○ 削除された audio.src の復帰' );\r
 368                                         raw.src = this._src;\r
 369                                         //return;\r
 370                                 };                              \r
 371                                 \r
 372                                 if( this._touchRequested && !this._touched ){\r
 373                                         e = X_EventDispatcher_CURRENT_EVENTS[ X_EventDispatcher_CURRENT_EVENTS.length - 1 ];\r
 374                                         if( !e || !e[ 'pointerType' ] ){\r
 375                                                 alert( 'タッチイベント以外での play! ' + e.type );\r
 376                                                 return;\r
 377                                         };\r
 378                                         this._touched = true;\r
 379                                 } else\r
 380                                 if( !this._ready && ( !X_HTMLAudio_durationFix || !X_HTMLAudio_need1stTouch ) ){\r
 381                                         this.autoplay = true;\r
 382                                         return;\r
 383                                 };\r
 384 \r
 385                                 if( X_HTMLAudio_durationFix && X_HTMLAudio_need1stTouch && this._durationFixPhase === 1 ){\r
 386                                         console.log( '▲ DurationFix の開始(タッチ用)' );\r
 387                                         this._durationFixPhase = 2;\r
 388                                 };\r
 389 \r
 390                                 end   = X_Audio_getEndTime( this );\r
 391                                 begin = X_Audio_getStartTime( this, end, true );\r
 392 \r
 393                                 this._lastCurrentTime = begin / 1000;\r
 394 \r
 395                                 if( this._shortPlayFixON ){\r
 396                                         this._shortPlayFixTime = ( 1000 < end - begin ) ? 200 : 400;\r
 397                                         if( this.duration < end + this._shortPlayFixTime ){\r
 398                                                 this._shortPlayFixTime = this.duration - end;\r
 399                                         };\r
 400                                 };\r
 401 \r
 402                                 if( this._durationFixSkip || this._endedFixON ){\r
 403                                         console.log( '☆ audio.play をスキップ ' + begin + ' -> ' + end + ' crt:' + ( raw.currentTime | 0 ) );\r
 404                                 } else {\r
 405                                         if( !this.playing ){\r
 406                                                 if( X_HTMLAudio_volumeFix ){\r
 407                                                         raw.volume = 0;\r
 408                                                 } else {\r
 409                                                         raw.volume = X_HTMLAudio_volumeEnabled ? this.gain : 1;\r
 410                                                 };\r
 411                                                 raw.play();\r
 412                                                 this.playing = true;\r
 413                                         } else\r
 414                                         if( X_HTMLAudio_needPlayForSeek || forcePlay ){\r
 415                                                 raw.play();\r
 416                                                 console.log( '[HTMLAudio] currentTime より先.' );\r
 417                                         };\r
 418                                         \r
 419                                         //http://himaxoff.blog111.fc2.com/blog-entry-97.html\r
 420                                         //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
 421                                         //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
 422 \r
 423                                         // iOS で duration が 0 の時に触ると error\r
 424                                         if( !X_HTMLAudio_durationFix || this.duration ) raw.currentTime = this._lastCurrentTime;\r
 425 \r
 426                                         console.log( '[HTMLAudio] play ' + begin + ' -> ' + end + ' crt:' + ( raw.currentTime | 0 ) + ' last:' + this._lastCurrentTime );\r
 427 \r
 428                                         if( forceReload || ( X_HTMLAudio_endedFixAOSP4 && raw.duration && raw.currentTime === raw.duration ) ){\r
 429                                                 raw.src          = '';\r
 430                                                 raw.src          = this._src;\r
 431                                                 this.playing     = false;\r
 432                                                 this._endedFixON = true;\r
 433                                                 console.log( '△ onEndedFix の開始' );\r
 434                                                 raw.currentTime  = this._lastCurrentTime;\r
 435                                                 this.disatcher[ 'dispatch' ]( X_EVENT_MEDIA_WAITING );\r
 436                                                 X_HTMLAudio_endedFixAOSP2 && raw.load();\r
 437                                         };\r
 438                                 };\r
 439 \r
 440                                 if( X_HTMLAudio_currentTimeFix ){\r
 441                                         this._currentFixBegin = begin;\r
 442                                         this._currentFixStart = X_Timer_now();\r
 443                                 };\r
 444                         },\r
 445                         \r
 446                         actualPause : function(){\r
 447                                 console.log( '[HTMLAudio] pause' );\r
 448                                 \r
 449                                 this.seekTime = this.getActualCurrentTime();\r
 450 \r
 451                                 delete this._currentFixStart;\r
 452 \r
 453                                 !this[ '_rawObject' ].error && this[ '_rawObject' ].pause();\r
 454                                 \r
 455                                 if( X_HTMLAudio_pauseFix ){\r
 456                                         this[ '_rawObject' ].src = '';\r
 457                                         if( X_HTMLAudio_durationFix ){\r
 458                                                 delete this._durationFixPhase;\r
 459                                                 delete this._durationFixSkip;\r
 460                                         };\r
 461                                 };\r
 462                                 delete this.playing;\r
 463                         },\r
 464                         \r
 465                         getActualCurrentTime : function(){\r
 466                                 return ( X_HTMLAudio_currentTimeFix ?\r
 467                                                         X_Timer_now() - this._currentFixStart + this._currentFixBegin :\r
 468                                                         this[ '_rawObject' ].currentTime * 1000 | 0 );\r
 469                         },\r
 470                 /*\r
 471                 http://www.w3schools.com/tags/av_prop_error.asp\r
 472                 1 = MEDIA_ERR_ABORTED - fetching process aborted by user\r
 473                 2 = MEDIA_ERR_NETWORK - error occurred when downloading\r
 474                 3 = MEDIA_ERR_DECODE - error occurred when decoding\r
 475                 4 = MEDIA_ERR_SRC_NOT_SUPPORTED - audio/video not supported\r
 476                 */                      \r
 477                         getActualError : function(){\r
 478                                 return this[ '_rawObject' ].error || 0;\r
 479                         },\r
 480                         \r
 481                         afterUpdateState : function( result ){\r
 482                                 if( result & 3 ){ // seek\r
 483                                         this.actualPlay();\r
 484                                 } else\r
 485                                 if( ( result & 4 ) && X_HTMLAudio_volumeEnabled ){\r
 486                                    this[ '_rawObject' ].volume = this.gain;\r
 487                                 };                              \r
 488                         }\r
 489         \r
 490                 }\r
 491         );\r
 492         \r
 493         X_HTMLAudio && X_Audio_BACKENDS.push(\r
 494                 {\r
 495                         backendID   : 2,\r
 496                         \r
 497                         backendName : 'HTMLAudio',\r
 498                         \r
 499                         canPlay : X_Audio_codecs,\r
 500                 /*\r
 501                  * 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
 502                  * https://developer.mozilla.org/ja/docs/Web/HTML/Supported_media_formats\r
 503                  * \r
 504                  * 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
 505                  * http://sothis.blog.so-net.ne.jp/2010-10-27\r
 506                  * 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
 507                  * \r
 508                  * IE9 の HTML5 Audio について\r
 509                  * http://kentablog.cluscore.com/2011/05/ie9-html5-audio.html\r
 510                  * 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
 511                  * 2.クロスドメインアクセスには、「clientaccesspolicy.xml」か「crossdomain.xml」が必要\r
 512                  * 3.wav が不可\r
 513                  * \r
 514                  * IE9でHTML5 autio タグが無効になる\r
 515                  * http://bbs.wankuma.com/index.cgi?mode=al2&namber=64886&KLOG=109\r
 516                  *  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
 517                  *  createElement等で動的生成すると、よろしくない\r
 518                  * \r
 519                  * media-can-play-wav-audio.html\r
 520                  * https://github.com/adobe/webkit/blob/master/LayoutTests/media/media-can-play-wav-audio.html\r
 521                  * testExpected("audio.canPlayType('audio/wav; codecs=1')", "probably");\r
 522                  * \r
 523                  * HTML5 audioタグ ブラウザ間の違い\r
 524                  * 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
 525                  *  - volume, muted iPhone(iOS4-6)、Android(2.3.6)では動作せず。\r
 526                  *  - 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
 527                  */     \r
 528                         detect : function( proxy, source, ext ){\r
 529                                 proxy[ 'asyncDispatch' ]( { type : X_EVENT_COMPLETE, canPlay : X_Audio_codecs[ ext ] } );\r
 530                         },\r
 531                         \r
 532                         klass : X_HTMLAudio\r
 533                         \r
 534                 } );\r
 535 \r
 536 /*\r
 537  * \r
 538  * howler.js\r
 539  *       codecs = {\r
 540           mp3: !!audioTest.canPlayType('audio/mpeg;').replace(/^no$/, ''),\r
 541           opus: !!audioTest.canPlayType('audio/ogg; codecs="opus"').replace(/^no$/, ''),\r
 542           ogg: !!audioTest.canPlayType('audio/ogg; codecs="vorbis"').replace(/^no$/, ''),\r
 543           wav: !!audioTest.canPlayType('audio/wav; codecs="1"').replace(/^no$/, ''),\r
 544           aac: !!audioTest.canPlayType('audio/aac;').replace(/^no$/, ''),\r
 545           m4a: !!(audioTest.canPlayType('audio/x-m4a;') || audioTest.canPlayType('audio/m4a;') || audioTest.canPlayType('audio/aac;')).replace(/^no$/, ''),\r
 546           mp4: !!(audioTest.canPlayType('audio/x-mp4;') || audioTest.canPlayType('audio/mp4;') || audioTest.canPlayType('audio/aac;')).replace(/^no$/, ''),\r
 547           weba: !!audioTest.canPlayType('audio/webm; codecs="vorbis"').replace(/^no$/, '')\r
 548         };\r
 549  */\r
 550         \r
 551 };\r
 552 \r
 553 \r
 554 \r
 555 \r
 556 \r