Mercurial > sdl-ios-xcode
view test/testtimer.c @ 2661:d38309be5178 gsoc2008_audio_resampling
The windowed sinc filter generation code seems to be working fine. The FIR filtering code is also now working reasonably well. Occasionally the FIR filter will pop, but setting the normalization factor lower seems to help this. I suspect the problem is in the fixed point multiply/add. I also have a hunch the zero stuffing/sample discarding code is not correct, and I'll look at that soon to get it sorted out.
author | Aaron Wishnick <schnarf@gmail.com> |
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date | Wed, 02 Jul 2008 08:04:50 +0000 |
parents | c121d94672cb |
children |
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/* Test program to check the resolution of the SDL timer on the current platform */ #include <stdlib.h> #include <stdio.h> #include "SDL.h" #define DEFAULT_RESOLUTION 1 static int ticks = 0; static Uint32 SDLCALL ticktock(Uint32 interval) { ++ticks; return (interval); } static Uint32 SDLCALL callback(Uint32 interval, void *param) { printf("Timer %d : param = %d\n", interval, (int) (uintptr_t) param); return interval; } int main(int argc, char *argv[]) { int desired; SDL_TimerID t1, t2, t3; if (SDL_Init(SDL_INIT_TIMER) < 0) { fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); return (1); } /* Start the timer */ desired = 0; if (argv[1]) { desired = atoi(argv[1]); } if (desired == 0) { desired = DEFAULT_RESOLUTION; } SDL_SetTimer(desired, ticktock); /* Wait 10 seconds */ printf("Waiting 10 seconds\n"); SDL_Delay(10 * 1000); /* Stop the timer */ SDL_SetTimer(0, NULL); /* Print the results */ if (ticks) { fprintf(stderr, "Timer resolution: desired = %d ms, actual = %f ms\n", desired, (double) (10 * 1000) / ticks); } /* Test multiple timers */ printf("Testing multiple timers...\n"); t1 = SDL_AddTimer(100, callback, (void *) 1); if (!t1) fprintf(stderr, "Could not create timer 1: %s\n", SDL_GetError()); t2 = SDL_AddTimer(50, callback, (void *) 2); if (!t2) fprintf(stderr, "Could not create timer 2: %s\n", SDL_GetError()); t3 = SDL_AddTimer(233, callback, (void *) 3); if (!t3) fprintf(stderr, "Could not create timer 3: %s\n", SDL_GetError()); /* Wait 10 seconds */ printf("Waiting 10 seconds\n"); SDL_Delay(10 * 1000); printf("Removing timer 1 and waiting 5 more seconds\n"); SDL_RemoveTimer(t1); SDL_Delay(5 * 1000); SDL_RemoveTimer(t2); SDL_RemoveTimer(t3); SDL_Quit(); return (0); }