bytemedia

commit: 25287ed92b8cbfd75ffe83b56fb240019c3fcd2e
parent 4933695039f2b8493212ec675dea7598c70aa562
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Sun,  6 Feb 2022 02:24:11 +0100

2022-02-06.c: New

Diffstat:
A
C/2022-02-06.c
41
+++++++++++++++++++++++++++++++++++++++++

1 file changed, 41 insertions(+), 0 deletions(-)
diff --git a/C/2022-02-06.c b/C/2022-02-06.c
@@ -0,0 +1,41 @@
+#define _XOPEN_SOURCE 700
+#include <stdio.h>
+#include <inttypes.h> // uint32_t
+#include <math.h> // sinf(), M_PI, pow()
+
+#include "au.h"
+int
+main(void)
+{
+	// Use AU defaults
+	struct au_header header = {
+		.offset = 24, // no-annotation, in octets
+		.length = 0,
+		.encoding = AU_ENCODING_8B_LPCM,
+		.samplerate = 44000, // Hz
+		.channels = 1
+	};
+
+	char buf[4];
+	int32_t t;
+
+	// fd 1 is stdout
+	write_au_header(1, &header);
+
+	//for(t = 0;;t++) {
+	for(t = 0;t<header.samplerate*60;t++) {
+		float tune;
+		int freq = 140;
+		//int freq = 180 + (t / (header.samplerate / 666) % 10);
+		int phase = t >> 5;
+		int volume = 20;
+
+		tune =  sinf(t * 2*M_PI * (freq + ((t>>3) % 300))/header.samplerate) * volume/9;
+		//tune += sinf(t * 2*M_PI * (freq + ((t>>5) % 600))/header.samplerate) * volume/3;
+		tune += sinf(t * 2*M_PI * (freq + ((713&t>>(t/header.samplerate/3)) % 2000))/header.samplerate) * volume/2;
+
+		putchar((uint8_t)(tune));
+	}
+
+	return 0;
+}