捕获电脑的声音放到手机播放

最近笔记本的音响坏了，郁闷啊、纠结中，有一个想法：捕获电脑的声音，这个声音可以是movie的声音、music的声音、或者系统的声音，只要是经过声卡播放的声音，都可以捕获。然后通过usb发送到手机上播放，也可以通过wifi发送到手机播放。

看看怎么做，可以使用微软发布的DirectX SDK，我使用的是DirectX 10 SDK，很多地方可以下载到这个sdk， 大小500M左右。在sdk的目录DirectX 10 SDK\Samples\C++\DirectSound下，有一个例子CaptureSound，CaptureSound是用来捕获声音的，它一面捕获声音，一面写进一个wav的文件里。修改这个例子，把捕获的声音立即发送给手机，可以通过usb发送、或者wifi。

首先设置pc的录音通道，在电脑的托盘上，双击小喇叭，菜单“选项”->“属性”，选择“录音”，只勾选“立体声混音”。看一下效果：

 

转载，请写明出处：http://blog.csdn.net/menghnhhuan/article/details/8281747

usb通信时这样的：

在pc上使用adb命令：adb forward tcp:4626 tcp:4883，在PC上建立4626端口通信数据将被重定向到手机端server的4883端口；然后初始化socket，连接到手机4626端口，进行socket通信。PC端代码如下：

 

DWORD WINAPI usbThreadFunc(LPVOID threadNum){int length;CString temp;if(!initAdb())//adb init{MessageBox(0, L"初始化手机出错！", L"提示", MB_OK);return 0;}if(!InItClientSock())//socket init{MessageBox(0, L"初始化IP地址出错！", L"提示", MB_OK);return 0;}if(!USBConnectSock((HWND)threadNum))//connect socket{MessageBox(0, L"连接IP地址出错！", L"提示", MB_OK);return 0;}//等待连接的时候，连接可能被取消。if(clientThreadRun){}else{MessageBox(0, L"用户取消！", L"提示", MB_OK);return 0;}SetDlgItemText( (HWND)threadNum, IDC_SOUNDFILE, TEXT("&USB Disconnect") );EnableWindow( GetDlgItem( (HWND)threadNum, IDC_RECORD ), TRUE );EnableWindow( GetDlgItem( (HWND)threadNum, IDC_BUTTON_WIFI ), FALSE );while(clientThreadRun){if( (length = recv(clientSock,(char*)recv_message_client,sizeof(recv_message_client),0))>0){memset(recv_message_client, 0, sizeof(recv_message_client));LogPrintf(recv_message_client);}}return 0;}

 

这里说道最重要的是捕获声音，下面的代码启动了一个线程来处理捕获到的声音：

DWORD WINAPI captureThreadFunc(LPVOID hDlg){DWORD dwResult;while(g_bRecording) { dwResult = MsgWaitForMultipleObjects( 1, &g_hNotificationEvent, FALSE, INFINITE, QS_ALLEVENTS );switch( dwResult ){case STATUS_WAIT_0://case WAIT_OBJECT_0 + 0:RecordCapturedData();break;}}return 0;}

 

在创建捕获声音的设备的时候，会创建一个事件，这个事件就是捕获到一定长度的声音之后（比如2K大小的声音），会发出一个通知，告诉你去处理。上面的线程，就是一直待等待这个事件，然后再去处理捕获到的声音，把声音发送给socket，交给手机处理，代码：

HRESULT RecordCapturedData() {    HRESULT hr;    VOID*   pbCaptureData    = NULL;    DWORD   dwCaptureLength;    VOID*   pbCaptureData2   = NULL;    DWORD   dwCaptureLength2;    DWORD   dwReadPos;    DWORD   dwCapturePos;    LONG lLockSize;    if( NULL == g_pDSBCapture )        return S_FALSE;    if( FAILED( hr = g_pDSBCapture->GetCurrentPosition( &dwCapturePos, &dwReadPos ) ) )        return DXTRACE_ERR_MSGBOX( TEXT("GetCurrentPosition"), hr );    lLockSize = dwReadPos - g_dwNextCaptureOffset;    if( lLockSize < 0 )        lLockSize += g_dwCaptureBufferSize;    // Block align lock size so that we are always write on a boundary    lLockSize -= (lLockSize % g_dwNotifySize);    if( lLockSize == 0 )        return S_FALSE;    // Lock the capture buffer down    if( FAILED( hr = g_pDSBCapture->Lock( g_dwNextCaptureOffset, lLockSize,                                           &pbCaptureData, &dwCaptureLength,                                           &pbCaptureData2, &dwCaptureLength2, 0L ) ) )        return DXTRACE_ERR_MSGBOX( TEXT("Lock"), hr );    // Write the data to socket发送给手机socketSend(pbCaptureData,dwCaptureLength);    // Move the capture offset along    g_dwNextCaptureOffset += dwCaptureLength;     g_dwNextCaptureOffset %= g_dwCaptureBufferSize; // Circular buffer    if( pbCaptureData2 != NULL )    {        // Write the data to socket发送给手机 socketSend(pbCaptureData2,dwCaptureLength2);        // Move the capture offset along        g_dwNextCaptureOffset += dwCaptureLength2;         g_dwNextCaptureOffset %= g_dwCaptureBufferSize; // Circular buffer    }    // Unlock the capture buffer    g_pDSBCapture->Unlock( pbCaptureData,  dwCaptureLength,                            pbCaptureData2, dwCaptureLength2 );    return S_OK;}

 

通过socket发送数据的代码很简单，没有任何处理捕获到的声音数据，就发送给手机了

VOID socketSend(VOID* send_message, int length){if(clientSockConnect==0){int send_len = length;char * buf = (char*)send_message;while(send_len>0){int rc = send(clientSock,buf,send_len, 0);//MSG_OOBif (rc < 1)//if (rc == SOCKET_ERROR || rc == 0){break;}send_len -= rc;buf += rc;}buf = NULL;}}

手机端的代码如下，注意手机上audioTrack的设置：44100，AudioFormat.CHANNEL_CONFIGURATION_STEREO，AudioFormat.ENCODING_PCM_16BIT。在启动电脑捕获声音的时候也要同样的设置，否则播放的声音是杂音：

public class TcpConnect extends Thread {private ServerSocket mServerSocket;private Socket mClient;private Handler mHandler;private boolean running = false;private boolean palying = false;private int audioPlayBufSize;private AudioTrack audioTrack;private static final int frequency = 44100;private static final int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_STEREO;private static final int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;private ArrayList<byte[]> inBuf = new ArrayList<byte[]>();public TcpConnect(Handler handler) {mHandler = handler;audioPlayBufSize = AudioTrack.getMinBufferSize(frequency,channelConfiguration, audioEncoding);audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,// .STREAM_RING,//.STREAM_MUSIC,frequency, channelConfiguration, audioEncoding,audioPlayBufSize, AudioTrack.MODE_STREAM);audioTrack.setStereoVolume(1.0f, 1.0f);Log.d("playPCAudio", "audioPlayBufSize: " + audioPlayBufSize);palying = false;inBuf.clear();}public void run() {try {mServerSocket = new ServerSocket(4883);System.out.println("TcpConnect" + "开始监听");mClient = mServerSocket.accept();System.out.println("TcpConnect" + "检测到有连接");InputStream is = mClient.getInputStream();running = true;int readLen = 0;byte[] readBuf = new byte[audioPlayBufSize];System.out.println("TcpConnect" + "接收");playThread palyt = new playThread();palyt.setPriority(Thread.MAX_PRIORITY);palyt.start();while (running) {if ((readLen = is.read(readBuf, 0, audioPlayBufSize)) > 0) {byte[] tmpBuf = new byte[readLen];System.arraycopy(readBuf, 0, tmpBuf, 0, readLen);synchronized (inBuf) {inBuf.add(tmpBuf);}}}} catch (Exception e) {System.out.println("TcpConnect TCP error:" + e.getMessage());}System.out.println("TcpConnect over");}class playThread extends Thread {public playThread() {}public void run() {audioTrack.play();palying = true;while (running) {ArrayList<byte[]> buf = new ArrayList<byte[]>();buf.clear();synchronized (inBuf) {if (inBuf.size() == 0)continue;buf = (ArrayList<byte[]>) inBuf.clone();inBuf.clear();}for (int i = 0; i < buf.size(); i++) {byte[] tmpBuf = buf.get(i);audioTrack.write(tmpBuf, 0, tmpBuf.length);}}if (palying) {audioTrack.stop();audioTrack.release();palying = false;}}}}

我的博客：http://blog.csdn.net/menghnhhuan

PC和手机的代码下载地址：

http://download.csdn.net/detail/menghnhhuan/4873008

大家在捕获声音的时候，可能会出现杂音，需要调试，请留言。

有需要的同学在这里下载：http://pan.baidu.com/s/17W5Tt
已经上传到百度网盘，里面有使用说明。CSDN的下载链接需要积分，无法修改。