view src/timer/SDL_timer_c.h @ 4001:6831b8723a85 SDL-1.2

Don't initialize the audio buffer passed to the application's audio callback, since they are expected to entirely fill it with data or silence. For legacy apps that might expect the buffer to already have silence and thus may not fill the buffer in the callback, there's an environment variable to expose the old behaviour. Fixes Bugzilla #416.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 05 Jul 2007 02:24:36 +0000
parents d910939febfa
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

/* Useful functions and variables from SDL_timer.c */
#include "SDL_timer.h"

#define ROUND_RESOLUTION(X)	\
	(((X+TIMER_RESOLUTION-1)/TIMER_RESOLUTION)*TIMER_RESOLUTION)

extern int SDL_timer_started;
extern int SDL_timer_running;

/* Data to handle a single periodic alarm */
extern Uint32 SDL_alarm_interval;
extern SDL_TimerCallback SDL_alarm_callback;

/* Set whether or not the timer should use a thread.
   This should be called while the timer subsystem is running.
*/
extern int SDL_SetTimerThreaded(int value);

extern int SDL_TimerInit(void);
extern void SDL_TimerQuit(void);

/* This function is called from the SDL event thread if it is available */
extern void SDL_ThreadedTimerCheck(void);