ref: 79f8427436cf2da7de710e9046f2e01dc6c8b17e
dir: /pcsound/pcsound_win32.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // Copyright(C) 2007 Simon Howard // // This program 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; either version 2 // of the License, or (at your option) any later version. // // This program 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 this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA // 02111-1307, USA. // // DESCRIPTION: // PC speaker interface. // //----------------------------------------------------------------------------- #ifdef _WIN32 #include "SDL.h" #include "SDL_thread.h" #include <windows.h> #include "pcsound.h" #include "pcsound_internal.h" static SDL_Thread *sound_thread_handle; static int sound_thread_running; static pcsound_callback_func callback; static int SoundThread(void *unused) { int frequency; int duration; while (sound_thread_running) { callback(&duration, &frequency); if (frequency != 0) { Beep(frequency, duration); } else { Sleep(duration); } } return 0; } static int PCSound_Win32_Init(pcsound_callback_func callback_func) { OSVERSIONINFO osvi; BOOL result; // Temporarily disabled - the Windows scheduler is strange and // stupid. return 0; // Find the OS version osvi.dwOSVersionInfoSize = sizeof(osvi); result = GetVersionEx(&osvi); if (!result) { return 0; } // Beep() ignores its arguments on win9x, so this driver will // not work there. if (osvi.dwPlatformId != VER_PLATFORM_WIN32_NT) { // TODO: Use _out() to write directly to the PC speaker on // win9x: See PC/winsound.c in the Python standard library. return 0; } // Start a thread to play sound. callback = callback_func; sound_thread_running = 1; sound_thread_handle = SDL_CreateThread(SoundThread, NULL); return 1; } static void PCSound_Win32_Shutdown(void) { sound_thread_running = 0; SDL_WaitThread(sound_thread_handle, NULL); } pcsound_driver_t pcsound_win32_driver = { "Windows", PCSound_Win32_Init, PCSound_Win32_Shutdown, }; #endif /* #ifdef _WIN32 */