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 (waveOutPrepareHeader(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
00026 usererror("waveOutPrepareHeader failed");
00027 }
00028
00029 static void FillHeaders()
00030 {
00031 WAVEHDR *hdr;
00032
00033 for (hdr = _wave_hdr; hdr != endof(_wave_hdr); hdr++) {
00034 if (!(hdr->dwFlags & WHDR_INQUEUE)) {
00035 MxMixSamples(hdr->lpData, hdr->dwBufferLength / 4);
00036 if (waveOutWrite(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
00037 usererror("waveOutWrite failed");
00038 }
00039 }
00040 }
00041
00042 static void CALLBACK waveOutProc(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance,
00043 DWORD dwParam1, DWORD dwParam2)
00044 {
00045 switch (uMsg) {
00046 case WOM_DONE:
00047 if (_waveout != NULL) FillHeaders();
00048 break;
00049 default: break;
00050 }
00051 }
00052
00053 const char *SoundDriver_Win32::Start(const char * const *parm)
00054 {
00055 WAVEFORMATEX wfex;
00056 wfex.wFormatTag = WAVE_FORMAT_PCM;
00057 wfex.nChannels = 2;
00058 wfex.wBitsPerSample = 16;
00059 wfex.nSamplesPerSec = GetDriverParamInt(parm, "hz", 11025);
00060 wfex.nBlockAlign = (wfex.nChannels * wfex.wBitsPerSample) / 8;
00061 wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign;
00062
00063 _bufsize = GetDriverParamInt(parm, "bufsize", (GB(GetVersion(), 0, 8) > 5) ? 2048 : 1024);
00064
00065 if (waveOutOpen(&_waveout, WAVE_MAPPER, &wfex, (DWORD_PTR)&waveOutProc, 0, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
00066 return "waveOutOpen failed";
00067
00068 PrepareHeader(&_wave_hdr[0]);
00069 PrepareHeader(&_wave_hdr[1]);
00070 FillHeaders();
00071 return NULL;
00072 }
00073
00074 void SoundDriver_Win32::Stop()
00075 {
00076 HWAVEOUT waveout = _waveout;
00077
00078 _waveout = NULL;
00079 waveOutReset(waveout);
00080 waveOutUnprepareHeader(waveout, &_wave_hdr[0], sizeof(WAVEHDR));
00081 waveOutUnprepareHeader(waveout, &_wave_hdr[1], sizeof(WAVEHDR));
00082 waveOutClose(waveout);
00083 }