/*http://sdr-reu.wikispaces.com/file/view/SoundIn.cFile to read sound from sound card and record it to a file in PCM format.*/#include 
     
      #include 
      
       #include 
       
        #include 
        
         #pragma comment(lib, "winmm.lib")#define IN_BUFFERS_NUMBER  4           //开辟三个数据缓冲区#define REC_STATUS_STARTING_RECORD 1#define REC_STATUS_RECORDING 2#define REC_STATUS_ALL_DONE -2        //录音完成#define REC_STATUS_FINISHING  -1      //即将完成#define REC_STATUS_FAIL  -3#define SIZE_OF_WAVEHDR 32            //wave头大小//函数void FreeBuffers(WAVEHDR * buffers);DWORD WINAPI waveInProc(LPVOID threadControls);typedef struct soundInDataAndControls{    WAVEHDR buffers[IN_BUFFERS_NUMBER];  //开辟三个数据缓冲区    int recordingStatus;                 //录音状态    HWAVEIN inWaveDevice;    int buffers_left;                    //可用内存数目}SoundThreadInfo;WAVEFORMATEX sampleFormat; //全局变量char *  outfilename;HMMIO        m_hFile;MMCKINFO    m_MMCKInfoData;MMCKINFO    m_MMCKInfoParent;MMCKINFO    m_MMCKInfoChild;int main(){    MMRESULT errorResult = 0 ;    SoundThreadInfo soundIn;    HANDLE inWaveThreadHandle;                //线程    int x = 0;                                //计数器    soundIn.recordingStatus = 0;              //设置录音状态    soundIn.buffers_left = IN_BUFFERS_NUMBER; //设置预期缓冲数量    outfilename = ".\\1.wav";    inWaveThreadHandle = CreateThread(0 ,0,(LPTHREAD_START_ROUTINE)waveInProc,/*参数*/ &soundIn, 0, &errorResult);   //创建线程    if(!inWaveThreadHandle)    {        printf("Can't create sound in thread! -- %08X\n",GetLastError());        return 0;    }    CloseHandle(inWaveThreadHandle);        //关闭线程    for (x = 0; x
         
          > 3);    sampleFormat.nAvgBytesPerSec = sampleFormat.nSamplesPerSec * sampleFormat.nBlockAlign;    if(!CreateWaveFile())    {        return getchar();    }    //分配 memory sound in buffers.    for(x = 0; x < IN_BUFFERS_NUMBER; x++)  //this loop is not need after testing    {                                        //can be replaced with hard coded buffer allocation        //clear waveheaders        ZeroMemory(&soundIn.buffers[x],SIZE_OF_WAVEHDR);        soundIn.buffers[x].dwBufferLength = sampleFormat.nAvgBytesPerSec << 2;  //内存大小估计一块        soundIn.buffers[x].dwFlags = 0;        soundIn.buffers[x].lpData = (char *) VirtualAlloc(NULL, soundIn.buffers[0].dwBufferLength, MEM_COMMIT, PAGE_READWRITE);  //申请内存        if(soundIn.buffers[x].lpData == NULL)        {            printf("Sound In Buffer number %d failed to get allocate memory.\n",x);            for(--x;x;x--) // start 1 down, and while x!=0 x--            {                VirtualFree(soundIn.buffers[x].lpData, 0, MEM_RELEASE); //释放内存            }            return 0;        }        else        {            printf(" %d Buffer Application  sucsess\n",x);        }    }    //open wave device    errorResult = waveInOpen(&soundIn.inWaveDevice, WAVE_MAPPER, &sampleFormat, (DWORD)errorResult, 0, CALLBACK_THREAD);    if(errorResult != MMSYSERR_NOERROR)    {        FreeBuffers(soundIn.buffers);        return getchar();    }    // buffers and queue them    for(x=0;x
          
           dwBytesRecorded); //collect data if(inFORMATION->recordingStatus != 0) //recording not began or stopped只有0 ，-1 -2 三个值 { if(inFORMATION->recordingStatus == REC_STATUS_ALL_DONE) { printf("Possible error recieving WIM_DATA during condition ALL_DONE\n"); break; //time for thread to end } outputlenth = mmioWrite(m_hFile, ((WAVEHDR *) msg.lParam)->lpData,((WAVEHDR *)msg.lParam)->dwBytesRecorded); if(outputlenth == ((WAVEHDR *)msg.lParam)->dwBytesRecorded) { printf("sucsess save data_dwBytesRecorded %d\n",outputlenth); printf("sucsess save data_dwBufferLength %d\n",((WAVEHDR *)msg.lParam)->dwBufferLength); } //was this that last block the user wanted. if(inFORMATION->recordingStatus == REC_STATUS_FINISHING) { //the buffers are each sent back, but not requeue if(--inFORMATION->buffers_left == 0) { inFORMATION->recordingStatus = REC_STATUS_ALL_DONE; } printf("Buffer finished.\n"); continue; } } //if stopped it only requeue s the buffer and continues. //requeue buffer if(!waveInAddBuffer(inFORMATION->inWaveDevice, (WAVEHDR *) msg.lParam, SIZE_OF_WAVEHDR)) { if(!waveInAddBuffer(inFORMATION->inWaveDevice, (WAVEHDR *) msg.lParam, SIZE_OF_WAVEHDR)) { printf("Buffer requeue error.\n"); if(--inFORMATION->buffers_left < 2) { FreeBuffers(inFORMATION->buffers); printf("in requeue error device."); errorResult = waveInClose(inFORMATION->inWaveDevice); if(errorResult) { printf("Can't Close Wave Device!\n"); getchar(); } return 0; inFORMATION->recordingStatus = REC_STATUS_FINISHING; //finishing means takes the queued blocks and no more //in thoery the next block (the last one) that was queue //previously mmioAscend(m_hFile, &m_MMCKInfoChild, 0); mmioAscend(m_hFile, &m_MMCKInfoParent, 0); return -1; } } } } } return 1;}