mirror of https://github.com/OpenTTD/OpenTTD.git
112 lines
3.4 KiB
C++
112 lines
3.4 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file win32_s.cpp Handling of sound for Windows. */
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#include "../stdafx.h"
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#include "../openttd.h"
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#include "../driver.h"
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#include "../mixer.h"
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#include "../core/alloc_func.hpp"
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#include "../core/bitmath_func.hpp"
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#include "../core/math_func.hpp"
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#include "win32_s.h"
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#include <windows.h>
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#include <mmsystem.h>
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#include <versionhelpers.h>
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#include "../os/windows/win32.h"
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#include "../thread.h"
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#include "../safeguards.h"
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static FSoundDriver_Win32 iFSoundDriver_Win32;
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static HWAVEOUT _waveout;
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static WAVEHDR _wave_hdr[2];
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static int _bufsize;
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static HANDLE _thread;
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static DWORD _threadId;
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static HANDLE _event;
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static void PrepareHeader(WAVEHDR *hdr)
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{
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hdr->dwBufferLength = _bufsize * 4;
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hdr->dwFlags = 0;
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hdr->lpData = MallocT<char>(_bufsize * 4);
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if (waveOutPrepareHeader(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR) throw "waveOutPrepareHeader failed";
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}
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static DWORD WINAPI SoundThread(LPVOID)
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{
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SetCurrentThreadName("ottd:win-sound");
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do {
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for (WAVEHDR *hdr = _wave_hdr; hdr != endof(_wave_hdr); hdr++) {
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if ((hdr->dwFlags & WHDR_INQUEUE) != 0) continue;
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MxMixSamples(hdr->lpData, hdr->dwBufferLength / 4);
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if (waveOutWrite(_waveout, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR) {
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MessageBox(nullptr, L"Sounds are disabled until restart.", L"waveOutWrite failed", MB_ICONINFORMATION);
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return 0;
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}
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}
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WaitForSingleObject(_event, INFINITE);
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} while (_waveout != nullptr);
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return 0;
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}
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const char *SoundDriver_Win32::Start(const StringList &parm)
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{
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WAVEFORMATEX wfex;
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wfex.wFormatTag = WAVE_FORMAT_PCM;
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wfex.nChannels = 2;
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wfex.wBitsPerSample = 16;
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wfex.nSamplesPerSec = GetDriverParamInt(parm, "hz", 44100);
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wfex.nBlockAlign = (wfex.nChannels * wfex.wBitsPerSample) / 8;
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wfex.nAvgBytesPerSec = wfex.nSamplesPerSec * wfex.nBlockAlign;
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/* Limit buffer size to prevent overflows. */
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_bufsize = GetDriverParamInt(parm, "samples", 1024);
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_bufsize = std::min<int>(_bufsize, UINT16_MAX);
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try {
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if (nullptr == (_event = CreateEvent(nullptr, FALSE, FALSE, nullptr))) throw "Failed to create event";
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if (waveOutOpen(&_waveout, WAVE_MAPPER, &wfex, (DWORD_PTR)_event, 0, CALLBACK_EVENT) != MMSYSERR_NOERROR) throw "waveOutOpen failed";
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MxInitialize(wfex.nSamplesPerSec);
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PrepareHeader(&_wave_hdr[0]);
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PrepareHeader(&_wave_hdr[1]);
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if (nullptr == (_thread = CreateThread(nullptr, 8192, SoundThread, 0, 0, &_threadId))) throw "Failed to create thread";
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} catch (const char *error) {
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this->Stop();
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return error;
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}
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return nullptr;
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}
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void SoundDriver_Win32::Stop()
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{
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HWAVEOUT waveout = _waveout;
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/* Stop the sound thread. */
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_waveout = nullptr;
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SignalObjectAndWait(_event, _thread, INFINITE, FALSE);
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/* Close the sound device. */
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waveOutReset(waveout);
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waveOutUnprepareHeader(waveout, &_wave_hdr[0], sizeof(WAVEHDR));
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waveOutUnprepareHeader(waveout, &_wave_hdr[1], sizeof(WAVEHDR));
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waveOutClose(waveout);
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CloseHandle(_thread);
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CloseHandle(_event);
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}
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