Android 开发 AirPlay Server

base64-2.3.8.jar 
bcprov-ext-jdk16-1.46.jar
dd-plist.jar jmdns-3.4.0.jar
netty-3.2.4.Final.jar
(以上jar包可从 search.maven.org 搜索下载)

AirPlayServer dwa = AirPlayServer.getIstance();
dwa.setRtspPort(8998);

new Thread(new Runnable() {
    @Override
    public void run() {
        
        dwa.run();
    }
}).start();

1, audioTrack的实例化
//create the AudioTrack  
//audioTrack = new AudioTrack(streamType, sampleRateInHz, channelConfig, audioFormat, bufferSizeInBytes, mode);  
audioTrack = new AudioTrack(streamType, sampleRateInHz, AudioFormat.CHANNEL_CONFIGURATION_STEREO, audioFormat, bufferSizeInBytes, mode);//FIXME  

2, 采集数据处理
byte bytTemp = 0x00;
　　if (convertUnsignedToSigned) {
　　　　/* The line expects signed PCM samples, so we must
　　　　 * convert the unsigned PCM samples to signed.
　　　　 * Note that this only affects the high bytes!
　　　　 */
　　　　for(int i=0; i < samplesConverted.length; i += 2){
　　　　samplesConverted[i] = (byte)((samplesConverted[i] & 0xff) - 0x80);
　　　　//add by ville
　　　　bytTemp = samplesConverted[i];
　　　　samplesConverted[i] = samplesConverted[i + 1];
　　　　samplesConverted[i + 1] = bytTemp;
　　　　//end
　　}
}

The volume is a float value representing the audio attenuation in dB. A value of –144 means the audio is muted. Then it goes from –30 to 0.

if ("volume".equals(name)) {
    if (audioOutputQueue != null){ 
        float vol = Math.abs(Float.parseFloat(value));
        vol = (float) (1.0 - (vol / 29.0));
        audioOutputQueue.setRequestedVolume(vol);
   }
}

//注释掉如下两行
leftVolume = AudioTrack.getMaxVolume();
rightVolume = AudioTrack.getMaxVolume();

//157 行
String hostName = "DwAirPlay";//networkUtils.getHostUtils();