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