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flash air 不使用FMS(flash media server)麦克风语音录制并保存录音文件到本地

• flash 桌面应用程序

• Flex SDK 使用 Apache Flex 1.14.1

• 语音录制用 wav 格式转成 mp3格式

• 参考：

  • 声音保存为 wav 格式：
    
    https://www.adobe.com/devnet/air/flex/articles/using_mic_api.html
    
  • wav数据转mp3：
    
    https://github.com/kikko/Shine-MP3-Encoder-on-AS3-Alchemy
    

主程序代码：

详细代码已上传至：

https://github.com/Mr-hongji/VoiceRecording

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
					   xmlns:s="library://ns.adobe.com/flex/spark" 
					   xmlns:mx="library://ns.adobe.com/flex/mx"
					   creationComplete="windowedapplication1_creationCompleteHandler(event)">
	<fx:Script>
		<![CDATA[
			import com.adobe.audio.format.WAVWriter;
			
			import flash.utils.getTimer;
			
			import mx.core.UIComponent;
			import mx.events.FlexEvent;
			
			import fr.kikko.lab.ShineMP3Encoder;
			
			
			private var _myFile:FileReference;
			private var _voice:ByteArray;
			private var mic:Microphone;
			protected function windowedapplication1_creationCompleteHandler(event:FlexEvent):void
			{
				trace(Microphone.isSupported + "");
				trace(Microphone.names.length);
				
				_myFile = new FileReference();
				
				mic =  Microphone.getEnhancedMicrophone();
				//mic = Microphone.getMicrophone();
				mic.rate = 44;
				Security.showSettings("2");
				
				mic.setLoopBack(false);
				
				if (mic != null) 
				{
					mic.setUseEchoSuppression(true);
					mic.addEventListener(ActivityEvent.ACTIVITY, activityHandler);
					mic.addEventListener(StatusEvent.STATUS, statusHandler);
				}
			}
			
			private function startRecoder():void
			{
				_voice = new ByteArray();
				mic.addEventListener(SampleDataEvent.SAMPLE_DATA, sampleDataHandler);
			}
			
			private function sampleDataHandler(e:SampleDataEvent):void
			{
				_voice.writeBytes( e.data );
			}
			
			private function activityHandler(event:ActivityEvent):void 
			{
				trace("activityHandler: " + event);
			}
			
			private function statusHandler(event:StatusEvent):void
			{
				trace("statusHandler: " + event);
			}
			
			private function stopRecoder():void
			{
				mic.removeEventListener(SampleDataEvent.SAMPLE_DATA, startRecoder);
				
				_voice.position = 0 ;
				//saveFile();
				convertToMP3();
			}
			
			protected function saveFile():void 
			{ 
				var outputFile:File = File.desktopDirectory.resolvePath("123.wav"); 
				var outputStream:FileStream = new FileStream(); 
				var wavWriter:WAVWriter = new WAVWriter(); 
				_voice.position = 0;  // rewind to the beginning of the sample 
				
				wavWriter.numOfChannels = 1; // set the inital properties of the Wave Writer 
				wavWriter.sampleBitRate = 16; 
				wavWriter.samplingRate = 44100; 
				
				outputStream.open(outputFile, FileMode.WRITE);  //write out our file to disk. 
				wavWriter.processSamples(outputStream, _voice, 44100, 1); // convert our ByteArray to a WAV file. 
				outputStream.close();
			} 
			
			
			private var _mp3Encoder:ShineMP3Encoder;
			private var _timer: int ;
			
			private function convertToMP3(): void
			{
				var wavWrite:WAVWriter = new WAVWriter();
				wavWrite.numOfChannels = 1 ;
				wavWrite.sampleBitRate = 16 ;
				wavWrite.samplingRate = 44100 ;
				
				var wav:ByteArray = new ByteArray();
				
				_timer = getTimer();
				wavWrite.processSamples(wav, _voice, 44100 , 1 );
				trace( 'convert to a WAV used: ' + (getTimer() - _timer) + 'ms' );
				
				wav.position = 0 ;
				trace( 'WAV size:' + wav.bytesAvailable + ' bytes' );
				trace( 'Asynchronous convert to MP3 now' );
				
				_timer = getTimer();
				_mp3Encoder = new ShineMP3Encoder( wav );
				_mp3Encoder.addEventListener(Event.COMPLETE, onEncoded);
				_mp3Encoder.addEventListener(ProgressEvent.PROGRESS, onEncoding);
				_mp3Encoder.addEventListener(ErrorEvent.ERROR, onEncodeError);
				_mp3Encoder.start();
			}
			
			private function onEncoded(e:Event): void
			{
				trace( 'encode MP3 complete used: ' + (getTimer() - _timer) + 'ms' );
				_mp3Encoder.mp3Data.position = 0 ;
				trace( 'MP3 size:' + _mp3Encoder.mp3Data.bytesAvailable + ' bytes' );
				trace( 'press <key>: <s>ave to MP3 or <r>ecord again' );
				_mp3Encoder.saveAs(new Date().getTime() + ".mp3");
			}
			
			private function onEncoding(e:ProgressEvent): void
			{
				trace( 'encoding MP3... ' + Number (e.bytesLoaded / e.bytesTotal * 100 ).toFixed( 2 ) + '%' , true );
			}
			
			private function onEncodeError(e:ErrorEvent): void
			{
				trace( 'encode MP3 error ' + e.text);
			}
			
		]]>
	</fx:Script>
	
	<s:Button click="startRecoder()" label="开始录制"/>
	<s:Button click="stopRecoder()" label="停止录制" x="200"/>
</s:WindowedApplication>