--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Meerwald-dir/frid2_common.h	Fri Dec 20 13:08:59 2024 +0100
@@ -0,0 +1,12 @@
+#ifndef FRID2_COMMON_H
+#define FRID2_COMMON_H
+
+#define FORWARD_STEP(A) ((1.0 + A) / (1.0 - A))
+#define BACKWARD_STEP(A) ((1.0 - A) / (1.0 + A))
+
+void embed_low_freq(double **dcts, int cols, int rows, double alpha, int verbose);
+void embed_med_freq(double **dcts, int cols, int rows, double gamma, int seed, int verbose);
+double detect_low_freq(double **dcts, int cols, int rows, double alpha, double beta, int verbose);
+double detect_med_freq(double **dcts, int cols, int rows, int seed, int verbose);
+
+#endif