/* $Id$ */ /* * This file is part of OpenTTD. * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>. */ /** @file win32_s.cpp Handling of sound for Windows. */ #include "../stdafx.h" #include "../openttd.h" #include "../driver.h" #include "../mixer.h" #include "../core/alloc_func.hpp" #include "../core/bitmath_func.hpp" #include "../core/math_func.hpp" #include "win32_s.h" #include <windows.h> #include <mmsystem.h> static FSoundDriver_Win32 iFSoundDriver_Win32; static HWAVEOUT _waveout; static WAVEHDR _wave_hdr[2]; static int _bufsize; static HANDLE _thread; static DWORD _threadId; static HANDLE _event; static void PrepareHeader(WAVEHDR *hdr) { hdr->dwBufferLength = _bufsize * 4; hdr->dwFlags = 0; hdr->lpData = MallocT<char>(_bufsize * 4); if (waveOutPrepareHeader(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR) throw "waveOutPrepareHeader failed"; } static DWORD WINAPI SoundThread(LPVOID arg) { do { for (WAVEHDR *hdr = _wave_hdr; hdr != endof(_wave_hdr); hdr++) { if ((hdr->dwFlags & WHDR_INQUEUE) != 0) continue; MxMixSamples(hdr->lpData, hdr->dwBufferLength / 4); if (waveOutWrite(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR) { MessageBox(NULL, _T("Sounds are disabled until restart."), _T("waveOutWrite failed"), MB_ICONINFORMATION); return 0; } } WaitForSingleObject(_event, INFINITE); } while (_waveout != NULL); return 0; } const char *SoundDriver_Win32::Start(const char * const *parm) { WAVEFORMATEX wfex; wfex.wFormatTag = WAVE_FORMAT_PCM; wfex.nChannels = 2; wfex.wBitsPerSample = 16; wfex.nSamplesPerSec = GetDriverParamInt(parm, "hz", 44100); wfex.nBlockAlign = (wfex.nChannels * wfex.wBitsPerSample) / 8; wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign; /* Limit buffer size to prevent overflows. */ _bufsize = GetDriverParamInt(parm, "bufsize", (GB(GetVersion(), 0, 8) > 5) ? 8192 : 4096); _bufsize = min(_bufsize, UINT16_MAX); try { if (NULL == (_event = CreateEvent(NULL, FALSE, FALSE, NULL))) throw "Failed to create event"; if (waveOutOpen(&_waveout, WAVE_MAPPER, &wfex, (DWORD_PTR)_event, 0, CALLBACK_EVENT) != MMSYSERR_NOERROR) throw "waveOutOpen failed"; MxInitialize(wfex.nSamplesPerSec); PrepareHeader(&_wave_hdr[0]); PrepareHeader(&_wave_hdr[1]); if (NULL == (_thread = CreateThread(NULL, 8192, SoundThread, 0, 0, &_threadId))) throw "Failed to create thread"; } catch (char *error) { this->Stop(); return error; } return NULL; } void SoundDriver_Win32::Stop() { HWAVEOUT waveout = _waveout; /* Stop the sound thread. */ _waveout = NULL; SetEvent(_event); WaitForSingleObject(_thread, INFINITE); /* Close the sound device. */ waveOutReset(waveout); waveOutUnprepareHeader(waveout, &_wave_hdr[0], sizeof(WAVEHDR)); waveOutUnprepareHeader(waveout, &_wave_hdr[1], sizeof(WAVEHDR)); waveOutClose(waveout); CloseHandle(_thread); CloseHandle(_event); }