cpp/openttd-patchpack/source Files · src/sound/win32_s.cpp

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Location: cpp/openttd-patchpack/source/src/sound/win32_s.cpp

r12162:c4894f5339c3 2.1 KiB text/x-c Show Annotation Show as Raw Download as Raw

rubidium

(svn r16583) -Update: the order of the language files so it's in sync with english.txt. Normally WT2 would do this, but only with activity for those languages. Now we'd like to the order to match so we can more easily spot import bugs while developing WT3.

/* $Id$ */

/** @file win32_s.cpp Handling of sound for Windows. */

#include "../stdafx.h"
#include "../openttd.h"
#include "../driver.h"
#include "../mixer.h"
#include "../core/alloc_func.hpp"
#include "win32_s.h"
#include <windows.h>
#include <mmsystem.h>

static FSoundDriver_Win32 iFSoundDriver_Win32;

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 = MallocT<char>(_bufsize * 4);
	if (waveOutPrepareHeader(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
		usererror("waveOutPrepareHeader failed");
}

static void FillHeaders()
{
	WAVEHDR *hdr;

	for (hdr = _wave_hdr; hdr != endof(_wave_hdr); hdr++) {
		if (!(hdr->dwFlags & WHDR_INQUEUE)) {
			MxMixSamples(hdr->lpData, hdr->dwBufferLength / 4);
			if (waveOutWrite(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
				usererror("waveOutWrite failed");
		}
	}
}

static void CALLBACK waveOutProc(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance,
	DWORD dwParam1, DWORD dwParam2)
{
	switch (uMsg) {
		case WOM_DONE:
			if (_waveout != NULL) FillHeaders();
			break;
		default: break;
	}
}

const char *SoundDriver_Win32::Start(const char * const *parm)
{
	WAVEFORMATEX wfex;
	wfex.wFormatTag = WAVE_FORMAT_PCM;
	wfex.nChannels = 2;
	wfex.wBitsPerSample = 16;
	wfex.nSamplesPerSec = GetDriverParamInt(parm, "hz", 11025);
	wfex.nBlockAlign = (wfex.nChannels * wfex.wBitsPerSample) / 8;
	wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign;

	_bufsize = GetDriverParamInt(parm, "bufsize", (GB(GetVersion(), 0, 8) > 5) ? 2048 : 1024);

	if (waveOutOpen(&_waveout, WAVE_MAPPER, &wfex, (DWORD_PTR)&waveOutProc, 0, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
		return "waveOutOpen failed";

	PrepareHeader(&_wave_hdr[0]);
	PrepareHeader(&_wave_hdr[1]);
	FillHeaders();
	return NULL;
}

void SoundDriver_Win32::Stop()
{
	HWAVEOUT waveout = _waveout;

	_waveout = NULL;
	waveOutReset(waveout);
	waveOutUnprepareHeader(waveout, &_wave_hdr[0], sizeof(WAVEHDR));
	waveOutUnprepareHeader(waveout, &_wave_hdr[1], sizeof(WAVEHDR));
	waveOutClose(waveout);
}