网络录音播放器

               最近有个需求，需要实现网络录音播放功能，在一端录音，然后将数据通过网络传送到另外一端，并且播放，有点类似于QQ的语音聊天功能。先大概讲下服务端的实现。

//初始化部分

void CMyDlg::Init(){pWaveHdr1=reinterpret_cast<PWAVEHDR>(malloc(sizeof(WAVEHDR)));pSaveBuffer = reinterpret_cast<PBYTE>(malloc(1));pSaveBuffer1 = reinterpret_cast<PBYTE>(malloc(1));sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);    addr.sin_port=htons(2288);addr.sin_family=AF_INET;addr.sin_addr.S_un.S_addr=htonl(INADDR_ANY);    bind(sock,(SOCKADDR*)&addr,sizeof(addr));::WSAAsyncSelect(sock,m_hWnd,WM_ACCEPT,FD_ACCEPT);::listen(sock,5);/初始化网络waveform.wFormatTag=WAVE_FORMAT_PCM;waveform.nChannels=1;//声道数，单声道为1，双声道为2;waveform.nSamplesPerSec=11025;//采样频率；waveform.nAvgBytesPerSec=11025;             //每秒的数据量；waveform.nBlockAlign=1;                 //块对齐；waveform.wBitsPerSample=8;                  //WAVE文件的采样大小；waveform.cbSize=0;if (waveOutOpen(&hWaveOut,WAVE_MAPPER,&waveform,(DWORD)this->m_hWnd,NULL,CALLBACK_WINDOW)) {AfxMessageBox("Audio output erro");}//初始化播放器pSaveBuffer = (PBYTE)::realloc (pSaveBuffer, 1) ;pSaveBuffer1 = (PBYTE)::realloc (pSaveBuffer1, 1) ;cwin=::AfxBeginThread(RecvVoic,this);TRACE("SuspendThread\n");cwin->SuspendThread();}

异步套接字的消息处理部分

LRESULT CMyDlg::OnAccetp(WPARAM wParam, LPARAM lParam){switch(WSAGETSELECTEVENT(lParam)){case FD_ACCEPT:newsock=::accept((SOCKET)wParam,NULL,NULL);::WSAAsyncSelect(newsock,m_hWnd,WM_ACCEPT,FD_READ|FD_CLOSE|FD_WRITE);SetDlgItemText(IDC_EDIT1,"建立连接");break;case FD_WRITE:break;case FD_READ:ret=recv(wParam,buff,sizeof(buff),0);if(ret==SOCKET_ERROR){MessageBox("接收错误");return 0L;}//*******************************               EnterCriticalSection(&cs);if(mark)     //当前使用的是缓存pNewBuffer1{pNewBuffer1 = (PBYTE)realloc (pSaveBuffer1,dw1+ret);if (pNewBuffer1 == NULL){::MessageBox(NULL,"erro memory1",NULL,MB_OK);return 0L;}pSaveBuffer1 = pNewBuffer1 ;CopyMemory (pSaveBuffer1 + dw1, buff,ret) ;dw1+=ret;TRACE("OnAccetp recv %d, total = %d, pSaveBuffer1 \n", ret, dw1);}else  //当前使用的是缓存pNewBuffer{pNewBuffer = (PBYTE)realloc (pSaveBuffer,dw+ret);if (pNewBuffer == NULL){::MessageBox(NULL,"erro memory2",NULL,MB_OK);return 0L;}pSaveBuffer = pNewBuffer ;CopyMemory (pSaveBuffer + dw, buff,ret) ;dw+=ret;TRACE("OnAccetp recv %d, total = %d ,pSaveBuffer\n", ret, dw);}                LeaveCriticalSection(&cs);//********************************m_size+=ret;l.Format("%d",(m_size/1024));SetDlgItemText(IDC_EDIT2,l);l1.Format("%d",m_size);SetDlgItemText(IDC_EDIT3,l1);if(m_size>50000){if(!begin){TRACE("ResumeThread\n");cwin->ResumeThread();    //线程只能启动一次}begin=TRUE;}break;case FD_CLOSE:SetDlgItemText(IDC_EDIT1,"连接已经断开");break;}return 0L;}

播放数据线程

UINT CMyDlg::RecvVoic(LPVOID lParam){CMyDlg* dlg=(CMyDlg*)lParam;while(TRUE){EnterCriticalSection(&cs);if(dlg->mark)   //当前使用的是缓存pNewBuffer{dlg->mark=FALSE;dlg->pWaveHdr1->lpData          = (LPTSTR)dlg->pSaveBuffer1;dlg->pWaveHdr1->dwBufferLength  = dlg->dw1;}else{dlg->mark=TRUE;dlg->pWaveHdr1->lpData          = (LPTSTR)dlg->pSaveBuffer;dlg->pWaveHdr1->dwBufferLength  = dlg->dw;}                LeaveCriticalSection(&cs);dlg->pWaveHdr1->dwBytesRecorded = 0 ;dlg->pWaveHdr1->dwUser          = 0 ;dlg->pWaveHdr1->dwFlags         = WHDR_DONE;dlg->pWaveHdr1->dwLoops         = 1;dlg->pWaveHdr1->lpNext          = NULL ;dlg->pWaveHdr1->reserved        = 0 ;waveOutPrepareHeader(dlg->hWaveOut,dlg->pWaveHdr1, sizeof (WAVEHDR)) ;waveOutWrite (dlg->hWaveOut,dlg->pWaveHdr1, sizeof (WAVEHDR));TRACE("SuspendThread\n");dlg->cwin->SuspendThread();}return 0;}

数据处理完之后的清理工作

void CMyDlg::GetStat(UINT wParam, LONG lParam) {free(pWaveHdr1);pWaveHdr1=reinterpret_cast<PWAVEHDR>(malloc(sizeof(WAVEHDR)));if(mark){free(pSaveBuffer);pSaveBuffer = reinterpret_cast<PBYTE>(malloc(1));dw=0;//mark=FALSE;}else{  free(pSaveBuffer1);pSaveBuffer1 = reinterpret_cast<PBYTE>(malloc(1));dw1=0;//mark=TRUE;}TRACE("ResumeThread\n");cwin->ResumeThread();}

采用双缓存技术。