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#include "stdafx.h"
#include "openttd.h"
#include "driver.h"
#include "functions.h"
#include "mixer.h"
#include "sound/win32.h"
#include <windows.h>
static HWAVEOUT _waveout;
static WAVEHDR _wave_hdr[2];
static int _bufsize;
static void PrepareHeader(WAVEHDR *hdr)
{
hdr->dwBufferLength = _bufsize * 4;
hdr->dwFlags = 0;
hdr->lpData = malloc(_bufsize * 4);
if (hdr->lpData == NULL ||
waveOutPrepareHeader(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
error("waveOutPrepareHeader failed");
}
static void FillHeaders(void)
{
WAVEHDR *hdr;
for (hdr = _wave_hdr; hdr != endof(_wave_hdr); hdr++) {
if (!(hdr->dwFlags & WHDR_INQUEUE)) {
MxMixSamples(_mixer, hdr->lpData, hdr->dwBufferLength / 4);
if (waveOutWrite(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
error("waveOutWrite failed");
}
}
}
static void CALLBACK waveOutProc(HWAVEOUT hwo, UINT uMsg, DWORD dwInstance,
DWORD dwParam1, DWORD dwParam2)
{
switch (uMsg) {
case WOM_DONE:
if (_waveout) FillHeaders();
break;
default:
break;
}
}
static const char *Win32SoundStart(const char* const* parm)
{
WAVEFORMATEX wfex;
int hz;
_bufsize = GetDriverParamInt(parm, "bufsize", 1024);
hz = GetDriverParamInt(parm, "hz", 11025);
wfex.wFormatTag = WAVE_FORMAT_PCM;
wfex.nChannels = 2;
wfex.nSamplesPerSec = hz;
wfex.nAvgBytesPerSec = hz * 2 * 2;
wfex.nBlockAlign = 4;
wfex.wBitsPerSample = 16;
if (waveOutOpen(&_waveout, WAVE_MAPPER, &wfex, (DWORD)&waveOutProc, 0, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
return "waveOutOpen failed";
PrepareHeader(&_wave_hdr[0]);
PrepareHeader(&_wave_hdr[1]);
FillHeaders();
return NULL;
}
static void Win32SoundStop(void)
{
HWAVEOUT waveout = _waveout;
_waveout = NULL;
waveOutReset(waveout);
waveOutUnprepareHeader(waveout, &_wave_hdr[0], sizeof(WAVEHDR));
waveOutUnprepareHeader(waveout, &_wave_hdr[1], sizeof(WAVEHDR));
waveOutClose(waveout);
}
const HalSoundDriver _win32_sound_driver = {
Win32SoundStart,
Win32SoundStop,
};
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