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#include "../libfilter/iir_filter.h"
int am_init(int fast_math);
void am_exit(void);
typedef struct am_mod {
double rot; /* angle to rotate vector per sample */
double phase; /* current phase */
double gain; /* gain to be multiplied to amplitude */
double bias; /* DC offset to add (carrier amplitude) */
} am_mod_t;
int am_mod_init(am_mod_t *mod, double samplerate, double offset, double gain, double bias);
void am_mod_exit(am_mod_t *mod);
void am_modulate_complex(am_mod_t *mod, sample_t *amplitude, uint8_t *power, int num, float *baseband);
typedef struct am_demod {
double rot; /* angle to rotate vector per sample */
double phase; /* current rotation phase (used to shift) */
iir_filter_t lp[3]; /* filters received IQ signal/carrier */
double gain; /* gain to be expected from amplitude */
double bias; /* DC offset to be expected (carrier amplitude) */
} am_demod_t;
int am_demod_init(am_demod_t *demod, double samplerate, double offset, double gain, double bias);
void am_demod_exit(am_demod_t *demod);
void am_demodulate_complex(am_demod_t *demod, sample_t *amplitude, int length, float *baseband, sample_t *I, sample_t *Q, sample_t *carrier);
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