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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 "mydebug.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;
-
- int done;
-
- void fillerup(void *unused, Uint8 *stream, int len)
- {
- Uint8 *waveptr;
- int wavetoplay;
-
- if( (wave.soundlen-wave.soundpos)<=0 )
- {
- D(bug("Playing finito!\n"));
- done=1;
- return;
- }
-
- /* Set up the pointers */
- waveptr = wave.sound + wave.soundpos;
-
- wavetoplay = (wave.soundlen - wave.soundpos)>len ? len : (wave.soundlen - wave.soundpos);
-
- /* Go! */
- D(bug("Mixxo %ld bytes, da %lx...\n",wavetoplay,waveptr));
- SDL_MixAudio(stream, waveptr, wavetoplay, SDL_MIX_MAXVOLUME);
-
- wave.soundpos += wavetoplay;
- }
-
- main(int argc, char *argv[])
- {
- /* 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);
- }
-
- D(bug("Suono wav: len:%ld data:%lx T:%lx Fq:%ld C:%d\n",wave.soundlen,wave.sound,wave.spec.format,wave.spec.freq,wave.spec.channels));
- wave.spec.callback = fillerup;
-
- /* 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);
- }
-
- D(bug("Avvio il playback...\n"));
- SDL_PauseAudio(0);
-
- /* Let the audio run */
- while ( ! done && (SDL_GetAudioStatus() == SDL_AUDIO_PLAYING) )
- SDL_Delay(1000);
-
- /* Clean up on signal */
- SDL_CloseAudio();
- SDL_FreeWAV(wave.sound);
- exit(0);
- }
-