SDL.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:6k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- This library 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
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- #ifdef SAVE_RCSID
- static char rcsid =
- "@(#) $Id: SDL.c,v 1.4 2002/04/22 21:38:01 wmay Exp $";
- #endif
- /* Initialization code for SDL */
- #include <stdlib.h> /* For getenv() */
- #include "SDL.h"
- #include "SDL_endian.h"
- #include "SDL_fatal.h"
- #ifndef DISABLE_VIDEO
- #include "SDL_leaks.h"
- #endif
- /* Initialization/Cleanup routines */
- #ifndef DISABLE_JOYSTICK
- extern int SDL_JoystickInit(void);
- extern void SDL_JoystickQuit(void);
- #endif
- #ifndef DISABLE_CDROM
- extern int SDL_CDROMInit(void);
- extern void SDL_CDROMQuit(void);
- #endif
- #ifndef DISABLE_TIMERS
- extern void SDL_StartTicks(void);
- extern int SDL_TimerInit(void);
- extern void SDL_TimerQuit(void);
- #endif
- /* The current SDL version */
- static SDL_version version =
- { SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL };
- /* The initialized subsystems */
- static Uint32 SDL_initialized = 0;
- static Uint32 ticks_started = 0;
- #ifdef CHECK_LEAKS
- int surfaces_allocated = 0;
- #endif
- int SDL_InitSubSystem(Uint32 flags)
- {
- #ifndef DISABLE_VIDEO
- /* Initialize the video/event subsystem */
- if ( (flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO) ) {
- if ( SDL_VideoInit(getenv("SDL_VIDEODRIVER"),
- (flags&SDL_INIT_EVENTTHREAD)) < 0 ) {
- return(-1);
- }
- SDL_initialized |= SDL_INIT_VIDEO;
- }
- #else
- if ( flags & SDL_INIT_VIDEO ) {
- SDL_SetError("SDL not built with video support");
- return(-1);
- }
- #endif
- #ifndef DISABLE_AUDIO
- /* Initialize the audio subsystem */
- if ( (flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO) ) {
- if ( SDL_AudioInit(getenv("SDL_AUDIODRIVER")) < 0 ) {
- return(-1);
- }
- SDL_initialized |= SDL_INIT_AUDIO;
- }
- #else
- if ( flags & SDL_INIT_AUDIO ) {
- SDL_SetError("SDL not built with audio support");
- return(-1);
- }
- #endif
- #ifndef DISABLE_TIMERS
- /* Initialize the timer subsystem */
- if ( ! ticks_started ) {
- SDL_StartTicks();
- ticks_started = 1;
- }
- if ( (flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER) ) {
- if ( SDL_TimerInit() < 0 ) {
- return(-1);
- }
- SDL_initialized |= SDL_INIT_TIMER;
- }
- #else
- if ( flags & SDL_INIT_TIMER ) {
- SDL_SetError("SDL not built with timer support");
- return(-1);
- }
- #endif
- #ifndef DISABLE_JOYSTICK
- /* Initialize the joystick subsystem */
- if ( (flags & SDL_INIT_JOYSTICK) &&
- !(SDL_initialized & SDL_INIT_JOYSTICK) ) {
- if ( SDL_JoystickInit() < 0 ) {
- return(-1);
- }
- SDL_initialized |= SDL_INIT_JOYSTICK;
- }
- #else
- if ( flags & SDL_INIT_JOYSTICK ) {
- SDL_SetError("SDL not built with joystick support");
- return(-1);
- }
- #endif
- #ifndef DISABLE_CDROM
- /* Initialize the CD-ROM subsystem */
- if ( (flags & SDL_INIT_CDROM) && !(SDL_initialized & SDL_INIT_CDROM) ) {
- if ( SDL_CDROMInit() < 0 ) {
- return(-1);
- }
- SDL_initialized |= SDL_INIT_CDROM;
- }
- #else
- if ( flags & SDL_INIT_CDROM ) {
- SDL_SetError("SDL not built with cdrom support");
- return(-1);
- }
- #endif
- return(0);
- }
- int SDL_Init(Uint32 flags)
- {
- /* Clear the error message */
- SDL_ClearError();
- /* Initialize the desired subsystems */
- if ( SDL_InitSubSystem(flags) < 0 ) {
- return(-1);
- }
- /* Everything is initialized */
- if ( !(flags & SDL_INIT_NOPARACHUTE) ) {
- SDL_InstallParachute();
- }
- return(0);
- }
- void SDL_QuitSubSystem(Uint32 flags)
- {
- /* Shut down requested initialized subsystems */
- #ifndef DISABLE_CDROM
- if ( (flags & SDL_initialized & SDL_INIT_CDROM) ) {
- SDL_CDROMQuit();
- SDL_initialized &= ~SDL_INIT_CDROM;
- }
- #endif
- #ifndef DISABLE_JOYSTICK
- if ( (flags & SDL_initialized & SDL_INIT_JOYSTICK) ) {
- SDL_JoystickQuit();
- SDL_initialized &= ~SDL_INIT_JOYSTICK;
- }
- #endif
- #ifndef DISABLE_TIMERS
- if ( (flags & SDL_initialized & SDL_INIT_TIMER) ) {
- SDL_TimerQuit();
- SDL_initialized &= ~SDL_INIT_TIMER;
- }
- #endif
- #ifndef DISABLE_AUDIO
- if ( (flags & SDL_initialized & SDL_INIT_AUDIO) ) {
- SDL_AudioQuit();
- SDL_initialized &= ~SDL_INIT_AUDIO;
- }
- #endif
- #ifndef DISABLE_VIDEO
- if ( (flags & SDL_initialized & SDL_INIT_VIDEO) ) {
- SDL_VideoQuit();
- SDL_initialized &= ~SDL_INIT_VIDEO;
- }
- #endif
- }
- Uint32 SDL_WasInit(Uint32 flags)
- {
- if ( ! flags ) {
- flags = SDL_INIT_EVERYTHING;
- }
- return (SDL_initialized&flags);
- }
- void SDL_Quit(void)
- {
- /* Quit all subsystems */
- SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
- #ifdef CHECK_LEAKS
- /* Print the number of surfaces not freed */
- if ( surfaces_allocated != 0 ) {
- fprintf(stderr, "SDL Warning: %d SDL surfaces extantn",
- surfaces_allocated);
- }
- #endif
- /* Uninstall any parachute signal handlers */
- SDL_UninstallParachute();
- }
- /* Return the library version number */
- const SDL_version * SDL_Linked_Version(void)
- {
- return(&version);
- }
- #if defined(_WIN32_WCE)
- /* Need to include DllMain() on Windows CE for some reason.. */
- #include <windows.h>
- BOOL APIENTRY DllMain( HANDLE hModule,
- DWORD ul_reason_for_call,
- LPVOID lpReserved )
- {
- switch (ul_reason_for_call) {
- case DLL_PROCESS_ATTACH:
- case DLL_THREAD_ATTACH:
- case DLL_THREAD_DETACH:
- case DLL_PROCESS_DETACH:
- break;
- }
- return TRUE;
- }
- #endif /* _WIN32_WCE */