From fcf34b20d40d511cbc36964d53fa00656ad8807a Mon Sep 17 00:00:00 2001
From: Florian Jung <flo@windfisch.org>
Date: Sun, 19 May 2013 19:20:08 +0200
Subject: initial commit

---
 wav.c | 102 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 wav.c

(limited to 'wav.c')

diff --git a/wav.c b/wav.c
new file mode 100644
index 0000000..e2ca4fd
--- /dev/null
+++ b/wav.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2010 Florian Jung <flo@windfisch.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+
+
+
+#include <stdio.h>
+
+
+
+void u16cpy(char *dest, int src)
+{
+	dest[0]=src%256;
+	dest[1]=src/256;
+}
+
+void s16cpy(char *dest, int src)
+{
+	if (src<0)
+		src=(~(-src))+1;
+
+	u16cpy(dest,src);
+}
+
+void u32cpy(char *dest, long int src)
+{
+	dest[0]=src%256;
+	dest[1]=(src/256)%256;
+	dest[2]=(src/256/256)%256;
+	dest[3]=(src/256/256/256)%256;
+}
+
+int main(int argc, char** argv)
+{
+	FILE *f;
+	f=fopen("test.wav","w");
+	
+	//char buf[44];
+	char buf[244];
+	
+	int datalen,filelen,n_chans,samp_rate,bytes;
+	
+	datalen=100;
+	n_chans=1;
+	samp_rate=22050;
+	bytes=2;
+	
+	
+	filelen=12 + 24 + 8+datalen; //RIFF<len>WAVE|fmt <len><fmt>|DATA<len><data>
+	
+	strcpy(buf+ 0, "RIFF");
+	u32cpy(buf+ 4, filelen-8);
+	strcpy(buf+ 8, "WAVE");
+	
+	strcpy(buf+12, "fmt ");
+	u32cpy(buf+16, 16);
+	u16cpy(buf+20, 1); // format=1 (PCM)
+	u16cpy(buf+22, n_chans); // mono
+	u32cpy(buf+24, samp_rate);
+	u32cpy(buf+28, samp_rate*n_chans*bytes);
+	u16cpy(buf+32, n_chans*bytes);
+	u16cpy(buf+34, bytes*8);
+	
+	strcpy(buf+36, "data");
+	u32cpy(buf+40, datalen);
+	//data follows	
+	
+	int i;
+	for (i=0;i<100;i++)
+	{
+		s16cpy(buf+i*2+44, sin((double)i/50.0*3.141592654*2)*30000);
+		//buf[i*2+44]= (sin((double)i/100.0*3.141592654*2)*30000);
+	}
+	
+	
+	fwrite(buf,1,244,f);
+	fclose(f);
+	
+	return 0;
+}
-- 
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