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Add filter switch to FSK modulator

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This commit is contained in:
Andreas Eversberg
2019-09-09 19:22:43 +02:00
parent 6dcc8baad4
commit 445af0c0a2
6 changed files with 32 additions and 9 deletions
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4
src/libfsk/fsk.h
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@@ -15,6 +15,8 @@ typedef struct fsk_mod {
int low_bit, high_bit; /* a low or high deviation means which bit? */
int tx_bit; /* current transmitting bit (-1 if not set) */
double tx_bitpos; /* current transmit position in bit */
int filter; /* set, if filters are used */
iir_filter_t lp[2]; /* filter to smoot transmission spectrum */
} fsk_mod_t;
typedef struct fsk_demod {
@@ -30,7 +32,7 @@ typedef struct fsk_demod {
double rx_bitadjust; /* how much does a bit change cause the sample clock to be adjusted in phase */
} fsk_demod_t;
int fsk_mod_init(fsk_mod_t *fsk, void *inst, int (*send_bit)(void *inst), int samplerate, double bitrate, double f0, double f1, double level, int coherent);
int fsk_mod_init(fsk_mod_t *fsk, void *inst, int (*send_bit)(void *inst), int samplerate, double bitrate, double f0, double f1, double level, int coherent, int filter);
void fsk_mod_cleanup(fsk_mod_t *fsk);
int fsk_mod_send(fsk_mod_t *fsk, sample_t *sample, int length, int add);
void fsk_mod_tx_reset(fsk_mod_t *fsk);