win32_s.cpp
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00002
00005 #include "../stdafx.h"
00006 #include "../openttd.h"
00007 #include "../driver.h"
00008 #include "../mixer.h"
00009 #include "../core/alloc_func.hpp"
00010 #include "win32_s.h"
00011 #include <windows.h>
00012 #include <mmsystem.h>
00013
00014 static FSoundDriver_Win32 iFSoundDriver_Win32;
00015
00016 static HWAVEOUT _waveout;
00017 static WAVEHDR _wave_hdr[2];
00018 static int _bufsize;
00019
00020 static void PrepareHeader(WAVEHDR *hdr)
00021 {
00022 hdr->dwBufferLength = _bufsize * 4;
00023 hdr->dwFlags = 0;
00024 hdr->lpData = MallocT<char>(_bufsize * 4);
00025 if (hdr->lpData == NULL ||
00026 waveOutPrepareHeader(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
00027 usererror("waveOutPrepareHeader failed");
00028 }
00029
00030 static void FillHeaders()
00031 {
00032 WAVEHDR *hdr;
00033
00034 for (hdr = _wave_hdr; hdr != endof(_wave_hdr); hdr++) {
00035 if (!(hdr->dwFlags & WHDR_INQUEUE)) {
00036 MxMixSamples(hdr->lpData, hdr->dwBufferLength / 4);
00037 if (waveOutWrite(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
00038 usererror("waveOutWrite failed");
00039 }
00040 }
00041 }
00042
00043 static void CALLBACK waveOutProc(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance,
00044 DWORD dwParam1, DWORD dwParam2)
00045 {
00046 switch (uMsg) {
00047 case WOM_DONE:
00048 if (_waveout != NULL) FillHeaders();
00049 break;
00050 default: break;
00051 }
00052 }
00053
00054 const char *SoundDriver_Win32::Start(const char * const *parm)
00055 {
00056 WAVEFORMATEX wfex;
00057 wfex.wFormatTag = WAVE_FORMAT_PCM;
00058 wfex.nChannels = 2;
00059 wfex.wBitsPerSample = 16;
00060 wfex.nSamplesPerSec = GetDriverParamInt(parm, "hz", 11025);
00061 wfex.nBlockAlign = (wfex.nChannels * wfex.wBitsPerSample) / 8;
00062 wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign;
00063
00064 _bufsize = GetDriverParamInt(parm, "bufsize", (GB(GetVersion(), 0, 8) > 5) ? 2048 : 1024);
00065
00066 if (waveOutOpen(&_waveout, WAVE_MAPPER, &wfex, (DWORD_PTR)&waveOutProc, 0, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
00067 return "waveOutOpen failed";
00068
00069 PrepareHeader(&_wave_hdr[0]);
00070 PrepareHeader(&_wave_hdr[1]);
00071 FillHeaders();
00072 return NULL;
00073 }
00074
00075 void SoundDriver_Win32::Stop()
00076 {
00077 HWAVEOUT waveout = _waveout;
00078
00079 _waveout = NULL;
00080 waveOutReset(waveout);
00081 waveOutUnprepareHeader(waveout, &_wave_hdr[0], sizeof(WAVEHDR));
00082 waveOutUnprepareHeader(waveout, &_wave_hdr[1], sizeof(WAVEHDR));
00083 waveOutClose(waveout);
00084 }