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-rw-r--r--libtoolame-dab/utils.h20
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diff --git a/libtoolame-dab/utils.h b/libtoolame-dab/utils.h
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+++ b/libtoolame-dab/utils.h
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+#ifndef _UTILS_H_
+#define _UTILS_H_
+
+#include <math.h>
+#include <stdint.h>
+
+#define MIN(a,b) (((a)<(b))?(a):(b))
+#define MAX(a,b) (((a)>(b))?(a):(b))
+
+#define NUMOF(l) (sizeof(l) / sizeof(*l))
+
+#define linear_to_dB(x) (log10(x) * 20)
+
+/* Calculate the little string containing a bargraph
+ * 'VU-meter' from the peak value measured
+ */
+const char* level(int channel, int* peak);
+
+#endif
+