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-
- #ifndef FFT_H
- #define FFT_H
-
-
- #define PI 3.14159265358979
- #define FORWARD -1
- #define INVERSE 1
- /* the filter option defines a filter from 1.0 to MINVAL. All */
- /* amplitudes below MINVAL are set to 0.0 */
- #define MINVAL 0.00001
-
- void fft(), xy_to_polar(), polar_to_xy();
- void unscramble_transform(), minmax(), data_multiply();
- double *get_filter();
- int dbl_scale(), int_scale(), long_scale();
-
- #endif
-