test/loopwave.c
changeset 0 74212992fb08
child 1151 be9c9c8f6d53
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/loopwave.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,102 @@
+
+/* 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);
+}