win32_s.cpp
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00012 #include "../stdafx.h"
00013 #include "../openttd.h"
00014 #include "../driver.h"
00015 #include "../mixer.h"
00016 #include "../core/alloc_func.hpp"
00017 #include "../core/bitmath_func.hpp"
00018 #include "win32_s.h"
00019 #include <windows.h>
00020 #include <mmsystem.h>
00021
00022 static FSoundDriver_Win32 iFSoundDriver_Win32;
00023
00024 static HWAVEOUT _waveout;
00025 static WAVEHDR _wave_hdr[2];
00026 static int _bufsize;
00027 static HANDLE _thread;
00028 static DWORD _threadId;
00029 static HANDLE _event;
00030
00031 static void PrepareHeader(WAVEHDR *hdr)
00032 {
00033 hdr->dwBufferLength = _bufsize * 4;
00034 hdr->dwFlags = 0;
00035 hdr->lpData = MallocT<char>(_bufsize * 4);
00036 if (waveOutPrepareHeader(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR) throw "waveOutPrepareHeader failed";
00037 }
00038
00039 static DWORD WINAPI SoundThread(LPVOID arg)
00040 {
00041 do {
00042 for (WAVEHDR *hdr = _wave_hdr; hdr != endof(_wave_hdr); hdr++) {
00043 if ((hdr->dwFlags & WHDR_INQUEUE) != 0) continue;
00044 MxMixSamples(hdr->lpData, hdr->dwBufferLength / 4);
00045 if (waveOutWrite(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR) {
00046 MessageBox(NULL, _T("Sounds are disabled until restart."), _T("waveOutWrite failed"), MB_ICONINFORMATION);
00047 return 0;
00048 }
00049 }
00050 WaitForSingleObject(_event, INFINITE);
00051 } while (_waveout != NULL);
00052
00053 return 0;
00054 }
00055
00056 const char *SoundDriver_Win32::Start(const char * const *parm)
00057 {
00058 WAVEFORMATEX wfex;
00059 wfex.wFormatTag = WAVE_FORMAT_PCM;
00060 wfex.nChannels = 2;
00061 wfex.wBitsPerSample = 16;
00062 wfex.nSamplesPerSec = GetDriverParamInt(parm, "hz", 44100);
00063 wfex.nBlockAlign = (wfex.nChannels * wfex.wBitsPerSample) / 8;
00064 wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign;
00065
00066 _bufsize = GetDriverParamInt(parm, "bufsize", (GB(GetVersion(), 0, 8) > 5) ? 8192 : 4096);
00067
00068 try {
00069 if (NULL == (_event = CreateEvent(NULL, FALSE, FALSE, NULL))) throw "Failed to create event";
00070
00071 if (waveOutOpen(&_waveout, WAVE_MAPPER, &wfex, (DWORD_PTR)_event, 0, CALLBACK_EVENT) != MMSYSERR_NOERROR) throw "waveOutOpen failed";
00072
00073 MxInitialize(wfex.nSamplesPerSec);
00074
00075 PrepareHeader(&_wave_hdr[0]);
00076 PrepareHeader(&_wave_hdr[1]);
00077
00078 if (NULL == (_thread = CreateThread(NULL, 8192, SoundThread, 0, 0, &_threadId))) throw "Failed to create thread";
00079 } catch (char *error) {
00080 this->Stop();
00081 return error;
00082 }
00083
00084 return NULL;
00085 }
00086
00087 void SoundDriver_Win32::Stop()
00088 {
00089 HWAVEOUT waveout = _waveout;
00090
00091
00092 _waveout = NULL;
00093 SetEvent(_event);
00094 WaitForSingleObject(_thread, INFINITE);
00095
00096
00097 waveOutReset(waveout);
00098 waveOutUnprepareHeader(waveout, &_wave_hdr[0], sizeof(WAVEHDR));
00099 waveOutUnprepareHeader(waveout, &_wave_hdr[1], sizeof(WAVEHDR));
00100 waveOutClose(waveout);
00101
00102 CloseHandle(_thread);
00103 CloseHandle(_event);
00104 }