mirror of https://github.com/OpenTTD/OpenTTD.git
85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
/* $Id$ */
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/** @file win32_s.cpp Handling of sound for Windows. */
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#include "../stdafx.h"
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#include "../openttd.h"
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#include "../driver.h"
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#include "../mixer.h"
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#include "../core/alloc_func.hpp"
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#include "win32_s.h"
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#include <windows.h>
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#include <mmsystem.h>
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static FSoundDriver_Win32 iFSoundDriver_Win32;
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static HWAVEOUT _waveout;
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static WAVEHDR _wave_hdr[2];
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static int _bufsize;
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static void PrepareHeader(WAVEHDR *hdr)
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{
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hdr->dwBufferLength = _bufsize * 4;
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hdr->dwFlags = 0;
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hdr->lpData = MallocT<char>(_bufsize * 4);
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if (hdr->lpData == NULL ||
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waveOutPrepareHeader(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
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usererror("waveOutPrepareHeader failed");
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}
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static void FillHeaders()
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{
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WAVEHDR *hdr;
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for (hdr = _wave_hdr; hdr != endof(_wave_hdr); hdr++) {
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if (!(hdr->dwFlags & WHDR_INQUEUE)) {
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MxMixSamples(hdr->lpData, hdr->dwBufferLength / 4);
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if (waveOutWrite(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
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usererror("waveOutWrite failed");
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}
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}
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}
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static void CALLBACK waveOutProc(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance,
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DWORD dwParam1, DWORD dwParam2)
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{
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switch (uMsg) {
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case WOM_DONE:
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if (_waveout != NULL) FillHeaders();
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break;
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default: break;
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}
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}
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const char *SoundDriver_Win32::Start(const char * const *parm)
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{
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WAVEFORMATEX wfex;
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wfex.wFormatTag = WAVE_FORMAT_PCM;
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wfex.nChannels = 2;
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wfex.wBitsPerSample = 16;
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wfex.nSamplesPerSec = GetDriverParamInt(parm, "hz", 11025);
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wfex.nBlockAlign = (wfex.nChannels * wfex.wBitsPerSample) / 8;
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wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign;
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_bufsize = GetDriverParamInt(parm, "bufsize", (GB(GetVersion(), 0, 8) > 5) ? 2048 : 1024);
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if (waveOutOpen(&_waveout, WAVE_MAPPER, &wfex, (DWORD_PTR)&waveOutProc, 0, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
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return "waveOutOpen failed";
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PrepareHeader(&_wave_hdr[0]);
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PrepareHeader(&_wave_hdr[1]);
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FillHeaders();
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return NULL;
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}
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void SoundDriver_Win32::Stop()
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{
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HWAVEOUT waveout = _waveout;
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_waveout = NULL;
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waveOutReset(waveout);
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waveOutUnprepareHeader(waveout, &_wave_hdr[0], sizeof(WAVEHDR));
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waveOutUnprepareHeader(waveout, &_wave_hdr[1], sizeof(WAVEHDR));
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waveOutClose(waveout);
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}
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