(function (window) {  
    
    var Player = function () {  
        //创建一个音频环境对象  
        audioContext = window.AudioContext || window.webkitAudioContext;  
        var context = new audioContext();  
        var isPlaying = false;
        var audioBuffers = []
		var audioBuffer = context.createBuffer(1, 8000, 8000);
		var playNextBuffer = function() {
	        isPlaying = false;
	        if (audioBuffers.length) {
	            playAudio(audioBuffers.shift());
	        }
	        //if (audioBuffers.length > 1) audioBuffers.shift();
	        //console.log(audioBuffers.length)
	    };
	    
	    var copyToCtxBuffer = function(fromBuffer) {
	        var nowBuffering = audioBuffer.getChannelData(0);
	                  
	        var buffer = new Int8Array( fromBuffer);
			for (var i = 0; i < 8000; i++) {
			
	            var word =  (buffer[i * 2] & 0xff) +  ((buffer[i * 2 + 1] & 0xff) << 8);
          		nowBuffering[i] = (((word + 32768) % 65536) - 32768) / 32768.0;
          
	        }
	    };
	    var playAudio = function(fromBuffer) {
	        if (isPlaying) {
	            //var buffer = new Int8Array( fromBuffer);
	            //copyAudioOutputArray(buffer);
	            audioBuffers.push(fromBuffer);
	            return;
	        }
	        isPlaying = true;
	        copyToCtxBuffer(fromBuffer);
	        var source = context.createBufferSource();
	        source.buffer = audioBuffer;
	        source.connect(context.destination);
	        source.onended = playNextBuffer;
	        //setTimeout(playNextBuffer, audioBufferTime-audioBuffers.length*200);
	        source.start();
	    };
    
        
        
        config =  {};  
        config.channelCount = 1;
        config.numberOfInputChannels = config.channelCount;
        config.numberOfOutputChannels = config.channelCount;
        config.sampleBits = config.sampleBits || 16;      //采样数位 8, 16  
        //config.sampleRate = config.sampleRate || (context.sampleRate / 6);   //采样率(1/6 44100)
        config.sampleRate = config.sampleRate || 8000;   //采样率16K
        //创建缓存，用来缓存声音  
        config.bufferSize = 8192;
        
        
        //将声音输入这个对像  
        var audioOutput = context.createBufferSource();  
          
        //设置音量节点  
        var volume = context.createGain();
        audioOutput.connect(volume);  
  
        // 创建声音的缓存节点，createScriptProcessor方法的  
        // 第二个和第三个参数指的是输入和输出都是声道数。
        var player = context.createScriptProcessor(config.bufferSize, 0, config.channelCount); 
         
        
  
        //开始播放  
        this.start = function () {
            audioOutput.connect(player);  
            player.connect(context.destination);
        };  
  
        //停止  
        this.stop = function () {  
            player.disconnect();             
        	context.close();

        };
  		this.addPlay = function (blob)
  		{
			var reader = new FileReader();
			// 读取这四个字节
			reader.readAsArrayBuffer(blob);
			reader.onload = function (e) {
				var buffer = reader.result;
				var view = new DataView(buffer);

				playAudio(view.buffer);
			};
  		};
        
        var $bo=$("#inbo");
        var $change=$("#change");
        var width=$bo.width();
        //音频采集  
        player.onaudioprocess = function (e) {
            
            
            //console.log(e.playbackTime);
           
        };  
  
    };  
    //抛出异常  
    Player.throwError = function (message) {  
        throw new function () { this.toString = function () { return message; };};  
    };  
    
    //获取播放机  
    Player.get = function (callback) {  
        if (callback) {  
            var rec = new Player();  
            callback(rec);  
        }  
    };  
    window.Player = Player;  
  
})(window);