zevv · vain · Jun 18, 2017 · Jun 18, 2017 · Jun 18, 2017 · Jun 18, 2017
diff --git a/main.c b/main.c
@@ -23,6 +23,7 @@
 
 #define SRC_INVALID INT_MAX
 #define DEFAULT_MUTE_KEYCODE 0x46 /* Scroll Lock */
+#define MAX_NUM_SAMPLES 3 /* Maximum number of samples per key */
 
 #define TEST_ERROR(_msg)		\
 	error = alGetError();		\
@@ -124,6 +125,8 @@ int main(int argc, char **argv)
 		open_console();
 	}
 
+	srand(time(0));
+
 	/* Create openal context */
 
 	ALCdevice *device = NULL;
@@ -301,23 +304,38 @@ int play(int code, int press)
 		handle_mute_key(code == opt_mute_keycode);
 	}
 
-	static ALuint buf[512] = { 0 };
-	static ALuint src[512] = { 0 };
+	static ALuint buf[512 * MAX_NUM_SAMPLES] = { 0 };
+	static ALuint src[512 * MAX_NUM_SAMPLES] = { 0 };
 
+	/* 0 <= "code" <= 255, which means that 0 <= "idx" <= 511. We could
+	 * then add "$rand * 512" to jump to one of the possible samples for
+	 * this keycode. */
 	int idx = code + press * 256;
 
-	if(src[idx] == 0) {
+	/* Find a valid sample for this key. Assumes that a key either has
+	 * MAX_NUM_SAMPLES samples or just one sample. */
+	char fname[256];
+	int rand_off = rand() % MAX_NUM_SAMPLES;
+	snprintf(fname, sizeof fname, "%s/%02x-%d-%d.wav", opt_path_audio, code, press, rand_off);
+	if (access(fname, R_OK) != 0)
+	{
+		printd("Sample #%d not found, falling back to #0");
+		rand_off = 0;
+		snprintf(fname, sizeof fname, "%s/%02x-%d-%d.wav", opt_path_audio, code, press, rand_off);
+	}
 
-		char fname[256];
-		snprintf(fname, sizeof(fname), "%s/%02x-%d.wav", opt_path_audio, code, press);
+	printd("Decided to use sample #%d (%s)", rand_off, fname);
 
+	idx += rand_off * 512;
+
+	if(src[idx] == 0) {
 		printd("Loading audio file \"%s\"", fname);
 
 		buf[idx] = alureCreateBufferFromFile(fname);
 		if(buf[idx] == 0) {
 
 			if(opt_fallback_sound) {
-				snprintf(fname, sizeof(fname), "%s/%02x-%d.wav", opt_path_audio, 0x31, press);
+				snprintf(fname, sizeof(fname), "%s/%02x-%d-0.wav", opt_path_audio, 0x31, press);
 				buf[idx] = alureCreateBufferFromFile(fname);
 			} else {
 				fprintf(stderr, "Error opening audio file \"%s\": %s\n", fname, alureGetErrorString());

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