I''ve been trying to write a wraparound of Windows'' waveOut*() sound API functions so that I can port a few UNIX games to Windows. The problem is that the test code dosen''t produce any sound output (note that this is dirived partially on someone else''s code in a prior thread). #include <windows.h> #ifndef False # define False 0 #endif #ifndef True # define True 1 #endif #ifndef Boolean # define Boolean unsigned char #endif static Boolean bPlaying = False; static WAVEHDR whdr; static WAVEFORMATEX wfx = { 1 , 2 , 44100 , 44100 * 4 , 4 , 16 , 0 }; static HWAVEOUT hwo = NULL; typedef struct { void *buffer; int buffer_length; /* In bytes (8 bits). */ } WSObject; static void CALLBACK WaveOutCB( HWAVEOUT hwo2, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 ); void WSPlayDSP(WSObject *obj_ptr); static void CALLBACK WaveOutCB( HWAVEOUT hwo2, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 ) { if(uMsg == WOM_DONE) { waveOutUnprepareHeader( hwo, &whdr, sizeof(whdr) ); waveOutClose(hwo); hwo = NULL; bPlaying = True; } return; } void WSPlayDSP(WSObject *obj_ptr) { MMRESULT mmr; if(bPlaying || (obj_ptr == NULL)) return; whdr.lpData = (char *)obj_ptr->buffer; whdr.dwBufferLength = (DWORD)obj_ptr->buffer_length; whdr.dwBytesRecorded = 0; whdr.dwUser = (int)NULL; whdr.dwFlags = WAVE_ALLOWSYNC /*| WAVE_FORMAT_DIRECT*/; whdr.dwLoops = 0; whdr.lpNext = NULL; whdr.reserved = 0; wfx.wFormatTag = 1; wfx.nChannels = 2; wfx.wBitsPerSample = 8; wfx.nSamplesPerSec = 11025; wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nChannels; wfx.nBlockAlign = wfx.nChannels * (wfx.wBitsPerSample / 8); wfx.cbSize = 0; /* Extra bytes after cbSize. */ mmr = waveOutOpen( &hwo, 0, &wfx, (DWORD)WaveOutCB, 0, CALLBACK_FUNCTION ); if(mmr != MMSYSERR_NOERROR) { MessageBox( NULL, "Error opening wave output device.", "Error", MB_OK ); return; } else { MessageBox( NULL, "Beginning play...", "Status", MB_OK ); } waveOutReset(&hwo); waveOutPrepareHeader(hwo, &whdr ,sizeof(whdr)); waveOutWrite(hwo, &whdr, sizeof(whdr)); bPlaying = True; return; } int WINAPI WinMain( HINSTANCE hInstance, // Instance HINSTANCE hPrevInstance, // Previous Instance LPSTR lpCmdLine, // Command Line Parameters int nCmdShow // Window Show State ) { int i; WSObject *obj_ptr = (WSObject *)malloc(sizeof(WSObject)); obj_ptr->buffer_length = 100000; obj_ptr->buffer = malloc(obj_ptr->buffer_length); WSPlayDSP(obj_ptr); i = 0; while(bPlaying) i++; free(obj_ptr->buffer); free(obj_ptr); obj_ptr = NULL; MessageBox( NULL, "Done playing!", "Status", MB_OK ); PostQuitMessage(0); return(0); }