moved yuv into seperate files

Makefile

@@ -22,5 +22,5 @@ clean:
 
 encode: encode.o mmap_file.o
 
-decode: decode.o mmap_file.o pcm.o wav.o alsa.o window.o ddc.o delay.o
+decode: decode.o mmap_file.o pcm.o wav.o alsa.o window.o ddc.o delay.o yuv.c
 

decode.c

@@ -10,6 +10,7 @@
 #include "pcm.h"
 #include "ddc.h"
 #include "delay.h"
+#include "yuv.h"
 
 float lerp(float a, float b, float x)
 {
@@ -40,21 +41,6 @@ char *string_time(char *fmt)
 	return s;
 }
 
-uint8_t R_YUV(uint8_t Y, uint8_t U, uint8_t V)
-{
-	(void)U;
-	return limit(0.0, 255.0, 0.003906 * ((298.082 * (Y - 16.0)) + (408.583 * (V - 128))));
-}
-uint8_t G_YUV(uint8_t Y, uint8_t U, uint8_t V)
-{
-	return limit(0.0, 255.0, 0.003906 * ((298.082 * (Y - 16.0)) + (-100.291 * (U - 128)) + (-208.12 * (V - 128))));
-}
-uint8_t B_YUV(uint8_t Y, uint8_t U, uint8_t V)
-{
-	(void)V;
-	return limit(0.0, 255.0, 0.003906 * ((298.082 * (Y - 16.0)) + (516.411 * (U - 128))));
-}
-
 void process_line(uint8_t *pixel, uint8_t *y_pixel, uint8_t *uv_pixel, int y_width, int uv_width, int width, int height, int n)
 {
 	// we only process after 2 full lines: on odd lines

yuv.c

@@ -0,0 +1,24 @@
+
+#include "yuv.h"
+
+uint8_t yuv_limit(float x)
+{
+	float tmp = x < 0.0 ? 0.0 : x;
+	return tmp > 255.0 ? 255.0 : tmp;
+}
+
+uint8_t R_YUV(uint8_t Y, uint8_t U, uint8_t V)
+{
+	(void)U;
+	return yuv_limit(0.003906 * ((298.082 * (Y - 16.0)) + (408.583 * (V - 128))));
+}
+uint8_t G_YUV(uint8_t Y, uint8_t U, uint8_t V)
+{
+	return yuv_limit(0.003906 * ((298.082 * (Y - 16.0)) + (-100.291 * (U - 128)) + (-208.12 * (V - 128))));
+}
+uint8_t B_YUV(uint8_t Y, uint8_t U, uint8_t V)
+{
+	(void)V;
+	return yuv_limit(0.003906 * ((298.082 * (Y - 16.0)) + (516.411 * (U - 128))));
+}
+

yuv.h

@@ -0,0 +1,9 @@
+
+#ifndef YUV_H
+#define YUV_H
+#include <stdint.h>
+
+uint8_t R_YUV(uint8_t, uint8_t, uint8_t);
+uint8_t G_YUV(uint8_t, uint8_t, uint8_t);
+uint8_t B_YUV(uint8_t, uint8_t, uint8_t);
+#endif