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Replace isNoise by computeSignalProperties and removeSignalOffset

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This commit is contained in:
Philippe Teuwen 2019-03-08 19:06:55 +01:00
commit 4160e32b0a
7 changed files with 92 additions and 129 deletions
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18
common/lfdemod.h
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@ -20,6 +20,14 @@
#include <stdbool.h> // for bool
#include "parity.h" // for parity test
#include "util.h" // for ARRAYLEN
//might not be high enough for noisy environments
#define NOISE_AMPLITUDE_THRESHOLD 10
//ignore buffer with less than x samples
#define SIGNAL_MIN_SAMPLES 100
//ignore first x samples of the buffer
#define SIGNAL_IGNORE_FIRST_SAMPLES 10
//generic
typedef struct {
int low;
@ -28,14 +36,10 @@ typedef struct {
int amplitude;
bool isnoise;
} signal_t;
extern signal_t* getSignalProperties(void);
signal_t* getSignalProperties(void);
extern uint32_t compute_mean_uint(uint8_t *in, size_t N);
extern int32_t compute_mean_int(int *in, size_t N);
bool isNoise_int(int *bits, uint32_t size);
bool isNoise(uint8_t *bits, uint32_t size);
extern void zeromean(uint8_t* data, size_t size);
void computeSignalProperties(uint8_t *bits, uint32_t size);
void removeSignalOffset(uint8_t *samples, uint32_t size);
void getNextLow(uint8_t *samples, size_t size, int low, size_t *i);
void getNextHigh(uint8_t *samples, size_t size, int high, size_t *i);
bool loadWaveCounters(uint8_t *samples, size_t size, int lowToLowWaveLen[], int highToLowWaveLen[], int *waveCnt, int *skip, int *minClk, int *high, int *low);