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

Files @ r10062:9a719b26b56e

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

r10062:9a719b26b56e 2.1 KiB text/x-c Show Annotation Show as Raw Download as Raw

rubidium

(svn r14229) -Feature: allow overriding the palette of the base GRFs. This way you can play with NewGRFs made for the Windows palette with the DOS palettes base GRFs (and vice versa). Note that for this to work correctly ALL NewGRFs must use the same palette; mix and match is not yet supported.

/* $Id$ */

/** @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 (hdr->lpData == NULL ||
			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);
}