From 74af58587359206ef92249d18e4830c40cac0bc5 Mon Sep 17 00:00:00 2001
From: Jedidiah Barber <contact@jedbarber.id.au>
Date: Mon, 19 Jun 2023 22:15:44 +1200
Subject: Initial commit

---
 example/ao_example.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 example/ao_example.c

(limited to 'example/ao_example.c')

diff --git a/example/ao_example.c b/example/ao_example.c
new file mode 100644
index 0000000..a5642a0
--- /dev/null
+++ b/example/ao_example.c
@@ -0,0 +1,87 @@
+/*
+ *
+ * ao_example.c
+ *
+ *     Written by Stan Seibert - July 2001
+ *
+ * Legal Terms:
+ *
+ *     This source file is released into the public domain.  It is
+ *     distributed without any warranty; without even the implied
+ *     warranty * of merchantability or fitness for a particular
+ *     purpose.
+ *
+ * Function:
+ *
+ *     This program opens the default driver and plays a 440 Hz tone for
+ *     one second.
+ *
+ * Compilation command line (for Linux systems):
+ *
+ *     gcc -o ao_example ao_example.c -lao -ldl -lm
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <ao/ao.h>
+#include <math.h>
+
+#define BUF_SIZE 4096
+
+int main()
+{
+	ao_device *device;
+	ao_sample_format format;
+	int default_driver;
+	char *buffer;
+	int buf_size;
+	int sample;
+	float freq = 440.0;
+	int i;
+
+	/* -- Initialize -- */
+
+	fprintf(stderr, "libao example program\n");
+
+	ao_initialize();
+
+	/* -- Setup for default driver -- */
+
+	default_driver = ao_default_driver_id();
+
+        memset(&format, 0, sizeof(format));
+	format.bits = 16;
+	format.channels = 2;
+	format.rate = 44100;
+	format.byte_format = AO_FMT_LITTLE;
+
+	/* -- Open driver -- */
+	device = ao_open_live(default_driver, &format, NULL /* no options */);
+	if (device == NULL) {
+		fprintf(stderr, "Error opening device.\n");
+		return 1;
+	}
+
+	/* -- Play some stuff -- */
+	buf_size = format.bits/8 * format.channels * format.rate;
+	buffer = calloc(buf_size,
+			sizeof(char));
+
+	for (i = 0; i < format.rate; i++) {
+		sample = (int)(0.75 * 32768.0 *
+			sin(2 * M_PI * freq * ((float) i/format.rate)));
+
+		/* Put the same stuff in left and right channel */
+		buffer[4*i] = buffer[4*i+2] = sample & 0xff;
+		buffer[4*i+1] = buffer[4*i+3] = (sample >> 8) & 0xff;
+	}
+	ao_play(device, buffer, buf_size);
+
+	/* -- Close and shutdown -- */
+	ao_close(device);
+
+	ao_shutdown();
+
+  return (0);
+}
-- 
cgit