Mercurial > sdl-ios-xcode
view test/loopwave.c @ 855:aa4ac9e65d92
I noticed MacOSX SDL sets up working directory to parent of executable.
On BeOS is should setup it the same way, but it only does when Tracker
wasn't restarted.
I checked code and it looks like a hack to me :(
It looks for env variable and than comapres it to default when OpenTracker
was started after boot, and wasn't restarted. That's probably ok, for that
exact case. Unfortunetly that variable isn't always like that. For
example, after Tracker crashes and is restarted, env variable most
probably is different (depends on how Tracker was restarted, by what
application, etc... for example: i have launcher application from which i
can restart Tracker, and after that nev variable points to that
application's directory, not Tracker's).
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Tue, 24 Feb 2004 18:58:40 +0000 (2004-02-24) |
parents | 74212992fb08 |
children | be9c9c8f6d53 |
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/* Program to load a wave file and loop playing it using SDL sound */ /* loopwaves.c is much more robust in handling WAVE files -- This is only for simple WAVEs */ #include <stdio.h> #include <stdlib.h> #include <signal.h> #include "SDL.h" #include "SDL_audio.h" struct { SDL_AudioSpec spec; Uint8 *sound; /* Pointer to wave data */ Uint32 soundlen; /* Length of wave data */ int soundpos; /* Current play position */ } wave; void fillerup(void *unused, Uint8 *stream, int len) { Uint8 *waveptr; int waveleft; /* Set up the pointers */ waveptr = wave.sound + wave.soundpos; waveleft = wave.soundlen - wave.soundpos; /* Go! */ while ( waveleft <= len ) { SDL_MixAudio(stream, waveptr, waveleft, SDL_MIX_MAXVOLUME); stream += waveleft; len -= waveleft; waveptr = wave.sound; waveleft = wave.soundlen; wave.soundpos = 0; } SDL_MixAudio(stream, waveptr, len, SDL_MIX_MAXVOLUME); wave.soundpos += len; } static int done = 0; void poked(int sig) { done = 1; } int main(int argc, char *argv[]) { char name[32]; /* Load the SDL library */ if ( SDL_Init(SDL_INIT_AUDIO) < 0 ) { fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); exit(1); } atexit(SDL_Quit); if ( argv[1] == NULL ) { fprintf(stderr, "Usage: %s <wavefile>\n", argv[0]); exit(1); } /* Load the wave file into memory */ if ( SDL_LoadWAV(argv[1], &wave.spec, &wave.sound, &wave.soundlen) == NULL ) { fprintf(stderr, "Couldn't load %s: %s\n", argv[1], SDL_GetError()); exit(1); } wave.spec.callback = fillerup; /* Set the signals */ #ifdef SIGHUP signal(SIGHUP, poked); #endif signal(SIGINT, poked); #ifdef SIGQUIT signal(SIGQUIT, poked); #endif signal(SIGTERM, poked); /* Initialize fillerup() variables */ if ( SDL_OpenAudio(&wave.spec, NULL) < 0 ) { fprintf(stderr, "Couldn't open audio: %s\n", SDL_GetError()); SDL_FreeWAV(wave.sound); exit(2); } SDL_PauseAudio(0); /* Let the audio run */ printf("Using audio driver: %s\n", SDL_AudioDriverName(name, 32)); while ( ! done && (SDL_GetAudioStatus() == SDL_AUDIO_PLAYING) ) SDL_Delay(1000); /* Clean up on signal */ SDL_CloseAudio(); SDL_FreeWAV(wave.sound); return(0); }