add looping

1 files changed, 40 insertions, 0 deletions

diff --git a/examples/loop.c b/examples/loop.c
new file mode 100644
index 0000000..1be04a9
--- /dev/null
+++ b/examples/loop.c
@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <math.h>
+#include <mossrose.h>
+#include <portaudio.h>
+
+#define PI 3.14159
+
+
+#define SAMPLE_RATE 44100
+#define N_CHANNELS 8
+
+float f(float t)
+{
+	const int f0 = 440;
+	const int f1 = 880;
+	return ( t*f1 ) + ( (1-t)*f0 );
+}
+
+int main()
+{
+	float data[SAMPLE_RATE];
+	for (long i=0; i<SAMPLE_RATE; i++) {
+		float time = ((float)i)/SAMPLE_RATE;
+		data[i] = sin(2*PI*f(time)*time);
+	}
+
+	struct mossrose_sound_t sound = {
+		.left = data, .right = NULL, .mono = true, .len = SAMPLE_RATE
+	};
+
+	int err = mossrose_init(SAMPLE_RATE, N_CHANNELS, true);
+	if (err != 0)
+		fprintf(stderr, "FAILED TO INITIALIZE MOSSROSE\n");
+
+	int chan = mossrose_play(&sound, -1, 5);
+	Pa_Sleep(5000);
+
+	mossrose_terminate();
+	return 0;
+}