Trouble recording sound

Hi guys,

hopefully you're not getting sick of me yet. basically, I'm trying to record sound coming in from the line-in socket. I've seen quite a few C++ examples but I haven't seen any C ones and I don't particularly won't to go delving into C++ just for the sake of one thing I want to do. I'm using Microsoft Visual Studio 6 Professional edition and running Windows XP SP2.

Below is the code I currently have. When startRecording() is called, "wim open" is displayed but I'm a bit stuck there, am I supposed to load all the data coming through into memory and if so, how do I go about doing that, I've tried looking through the FAQ, all the forums, on MSDN and I guess I'm just stupid (or very sleep deprived). Basically, once it finished recording I want it saved as a .wav file, but I'll try to figure that out later, baby steps is the key :)

By the way, I've used waveInGetDevCaps() to store the data of the input device already.

Code:

---


/* in sound.h */
WAVEFORMATEX pcmWaveFormat;
HWAVEIN m_hRecord;
LPWAVEHDR pHdr;

/* part of sound.c */

char buf[512];

void CALLBACK m_ThreadID(HWAVEIN hwi, UINT uMessage, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2)
{
        switch(uMessage) {
                case MM_WIM_OPEN:
                        sprintf(buf, "wim open");
                        break;
                case MM_WIM_CLOSE:
                        sprintf(buf, "wim close");
                        break;
                case MM_WOM_DONE:
                        sprintf(buf, "wom done");
                        break;
                case MM_WIM_DATA:
                        sprintf(buf, "wim data");
                        break;
                default:
                        break;
        }
        MessageBox(NULL, buf, "Debug", MB_OK);
}

void startRecording(void)
{
        char err[256] = "";
        int i = 0;

        pHdr = (LPWAVEHDR) GlobalLock(GlobalAlloc(GHND, sizeof(WAVEHDR)));

//        if(isPlaying) {
//                MessageBox(hwndMain, "You are currently playing a file", "Error", MB_ICONERROR|MB_OK);
//                return;
//        }
//        if(isRecording) {
//                MessageBox(hwndMain, "You are already recording a file", "Error", MB_ICONERROR|MB_OK);
//                return;
//        }

        isRecording = 1;

        m_hRecord = NULL;

        pcmWaveFormat.wFormatTag        = WAVE_FORMAT_PCM;
        pcmWaveFormat.cbSize                = 0;
        pcmWaveFormat.wBitsPerSample = 16;
        pcmWaveFormat.nSamplesPerSec = 22050;
        pcmWaveFormat.nChannels = 2;
        pcmWaveFormat.nAvgBytesPerSec        = pcmWaveFormat.nSamplesPerSec*(pcmWaveFormat.wBitsPerSample/8);
        pcmWaveFormat.nBlockAlign                = pcmWaveFormat.nChannels    *(pcmWaveFormat.wBitsPerSample/8);

        if(i = waveInOpen(&m_hRecord, WAVE_MAPPER, &pcmWaveFormat, (DWORD)m_ThreadID, 0, CALLBACK_FUNCTION))
        {
                waveInGetErrorText(i, err, 255);
                sprintf(buf, "WAVEIN Open (%d): %s", i, err);
                MessageBox(NULL, buf, "Error", MB_ICONERROR|MB_OK);
                return;
        }

        if(i = waveInPrepareHeader(m_hRecord, pHdr, sizeof(WAVEHDR)))
        {
                waveInGetErrorText(i, err, 255);
                sprintf(buf, "WAVEIN PrepareHeader (%d): %s", i, err);
                MessageBox(NULL, buf, "Error", MB_ICONERROR|MB_OK);
                return;
        }

        if(i = waveInAddBuffer(m_hRecord, pHdr, sizeof(WAVEHDR)))
        {
                waveInGetErrorText(i, err, 255);
                sprintf(buf, "WAVEIN AddBudder (%d): %s", i, err);
                MessageBox(NULL, buf, "Error", MB_ICONERROR|MB_OK);
                return;
        }

        if(i = waveInStart(m_hRecord))
        {
                waveInGetErrorText(i, err, 255);
                sprintf(buf, "WAVEIN InStart (%d): %s", i, err);
                MessageBox(NULL, buf, "Error", MB_ICONERROR|MB_OK);
                return;
        }

        /* save file */
        /* clean up */
        /* let them know it's done */
        return;
}

---

I hope I'm going through the right process. There should be a library for this :P

Thanks in advance,

Daniel Wallace

Never mind guys, I took a look at FMOD and realised that it can be used for recording also.

All sorted, including saving to a wav file (go wotsit)