win32_s.cpp
00001
00002
00003 #include "../stdafx.h"
00004 #include "../openttd.h"
00005 #include "../driver.h"
00006 #include "../mixer.h"
00007 #include "../core/alloc_func.hpp"
00008 #include "win32_s.h"
00009 #include <windows.h>
00010 #include <mmsystem.h>
00011
00012 static FSoundDriver_Win32 iFSoundDriver_Win32;
00013
00014 static HWAVEOUT _waveout;
00015 static WAVEHDR _wave_hdr[2];
00016 static int _bufsize;
00017
00018 static void PrepareHeader(WAVEHDR *hdr)
00019 {
00020 hdr->dwBufferLength = _bufsize * 4;
00021 hdr->dwFlags = 0;
00022 hdr->lpData = MallocT<char>(_bufsize * 4);
00023 if (hdr->lpData == NULL ||
00024 waveOutPrepareHeader(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
00025 error("waveOutPrepareHeader failed");
00026 }
00027
00028 static void FillHeaders()
00029 {
00030 WAVEHDR *hdr;
00031
00032 for (hdr = _wave_hdr; hdr != endof(_wave_hdr); hdr++) {
00033 if (!(hdr->dwFlags & WHDR_INQUEUE)) {
00034 MxMixSamples(hdr->lpData, hdr->dwBufferLength / 4);
00035 if (waveOutWrite(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR)
00036 error("waveOutWrite failed");
00037 }
00038 }
00039 }
00040
00041 static void CALLBACK waveOutProc(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance,
00042 DWORD dwParam1, DWORD dwParam2)
00043 {
00044 switch (uMsg) {
00045 case WOM_DONE:
00046 if (_waveout != NULL) FillHeaders();
00047 break;
00048 default: break;
00049 }
00050 }
00051
00052 const char *SoundDriver_Win32::Start(const char* const* parm)
00053 {
00054 WAVEFORMATEX wfex;
00055 wfex.wFormatTag = WAVE_FORMAT_PCM;
00056 wfex.nChannels = 2;
00057 wfex.wBitsPerSample = 16;
00058 wfex.nSamplesPerSec = GetDriverParamInt(parm, "hz", 11025);
00059 wfex.nBlockAlign = (wfex.nChannels * wfex.wBitsPerSample) / 8;
00060 wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign;
00061
00062 _bufsize = GetDriverParamInt(parm, "bufsize", (GB(GetVersion(), 0, 8) > 5) ? 2048 : 1024);
00063
00064 if (waveOutOpen(&_waveout, WAVE_MAPPER, &wfex, (DWORD_PTR)&waveOutProc, 0, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
00065 return "waveOutOpen failed";
00066
00067 PrepareHeader(&_wave_hdr[0]);
00068 PrepareHeader(&_wave_hdr[1]);
00069 FillHeaders();
00070 return NULL;
00071 }
00072
00073 void SoundDriver_Win32::Stop()
00074 {
00075 HWAVEOUT waveout = _waveout;
00076
00077 _waveout = NULL;
00078 waveOutReset(waveout);
00079 waveOutUnprepareHeader(waveout, &_wave_hdr[0], sizeof(WAVEHDR));
00080 waveOutUnprepareHeader(waveout, &_wave_hdr[1], sizeof(WAVEHDR));
00081 waveOutClose(waveout);
00082 }