Question

I am searching some alternative of pulseaudio for windows.
Under linux there is very simple way to output raw sound (with pulseaudio):

pa_simple_write(pulse, data, bufferSize, &error);

It’s work perfect with small buffers, that i send to function in the loop.

Under windows i use something like this:

void writeAudioBlock(HWAVEOUT hWaveOut, LPSTR block, DWORD size)
{
    WAVEHDR header;

    ZeroMemory(&header, sizeof(WAVEHDR));
    header.dwBufferLength = size;
    header.lpData = block;

    waveOutPrepareHeader(hWaveOut, &header, sizeof(WAVEHDR));

    ResetEvent(waveDone);

    waveOutWrite(hWaveOut, &header, sizeof(WAVEHDR));

    WaitForSingleObject(waveDone, INFINITE);

    waveOutUnprepareHeader(
        hWaveOut, 
        &header, 
        sizeof(WAVEHDR)
    );
}

It’s working, but when i send another piece of data i hear small delay between pieces. Any other way to output small chunks of data buffer to sound device?

Answer 1

If you want to play some audio file, you can use the PlaySound function in windows API.

For chunks of data stored in memory you have to use the Waveform API – waveOutXXX functions.

For the problems with the delay between chunks of audio you have to use some double buffering mechanism.

You can find an example here:
double buffering