kopia lustrzana https://github.com/UU5JPP/Wolf-LITE
112 wiersze
3.9 KiB
C
112 wiersze
3.9 KiB
C
#ifndef AUDIO_FILTERS_h
|
|
#define AUDIO_FILTERS_h
|
|
|
|
#include "stm32f4xx_hal.h"
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdbool.h>
|
|
#include "fpga.h"
|
|
#include "functions.h"
|
|
|
|
#define IIR_FILTERS_COUNT 69 // Total Filters In The Collection
|
|
#define IQ_HILBERT_TAPS 65 // Hilbert filter order
|
|
#define IIR_MAX_STAGES 15 // Maximum order of IIR filters
|
|
#define EQ_STAGES 1 // order of the biquad of the equalizer filter
|
|
#define BIQUAD_COEFF_IN_STAGE 5 // coefficients in manual Notch filter order
|
|
#define FIR_RX_HILBERT_STATE_SIZE (IQ_HILBERT_TAPS + AUDIO_BUFFER_HALF_SIZE - 1) // size of state buffers
|
|
#define FIR_TX_HILBERT_STATE_SIZE (IQ_HILBERT_TAPS + AUDIO_BUFFER_HALF_SIZE - 1)
|
|
#define IIR_RX_LPF_Taps_STATE_SIZE (IIR_MAX_STAGES * 2)
|
|
#define IIR_RX_GAUSS_Taps_STATE_SIZE (IIR_MAX_STAGES * 2)
|
|
#define IIR_TX_LPF_Taps_STATE_SIZE (IIR_MAX_STAGES * 2)
|
|
#define IIR_RX_HPF_Taps_STATE_SIZE (IIR_MAX_STAGES * 2)
|
|
#define IIR_TX_HPF_Taps_STATE_SIZE (IIR_MAX_STAGES * 2)
|
|
#define IIR_RX_HPF_SQL_STATE_SIZE (IIR_MAX_STAGES * 2)
|
|
|
|
#define CW_HPF_COUNT 3
|
|
#define SSB_HPF_COUNT 7
|
|
#define CW_LPF_COUNT 19
|
|
#define SSB_LPF_COUNT 11
|
|
#define AM_LPF_COUNT 18
|
|
#define NFM_LPF_COUNT 8
|
|
|
|
#define MAX_HPF_WIDTH_CW 100
|
|
#define MAX_HPF_WIDTH_SSB 500
|
|
#define MAX_LPF_WIDTH_CW 1000
|
|
#define MAX_LPF_WIDTH_SSB 3400
|
|
#define MAX_LPF_WIDTH_AM 10000
|
|
#define MAX_LPF_WIDTH_NFM 20000
|
|
|
|
typedef enum // BiQuad filter type for automatic calculation
|
|
{
|
|
BIQUAD_onepolelp,
|
|
BIQUAD_onepolehp,
|
|
BIQUAD_lowpass,
|
|
BIQUAD_highpass,
|
|
BIQUAD_bandpass,
|
|
BIQUAD_notch,
|
|
BIQUAD_peak,
|
|
BIQUAD_lowShelf,
|
|
BIQUAD_highShelf
|
|
} BIQUAD_TYPE;
|
|
|
|
typedef enum // type of filter in the collection
|
|
{
|
|
IIR_BIQUAD_HPF,
|
|
IIR_BIQUAD_LPF,
|
|
IIR_BIQUAD_LPF_GAUSS
|
|
} IIR_BIQUAD_FILTER_TYPE;
|
|
|
|
typedef enum // states of DC correctors for each user
|
|
{
|
|
DC_FILTER_RX_I,
|
|
DC_FILTER_RX_Q,
|
|
DC_FILTER_TX_I,
|
|
DC_FILTER_TX_Q,
|
|
DC_FILTER_FFT_I,
|
|
DC_FILTER_FFT_Q,
|
|
} DC_FILTER_STATE;
|
|
|
|
typedef struct // keep old sample values for DC filter. Multiple states for different consumers
|
|
{
|
|
float32_t x_prev;
|
|
float32_t y_prev;
|
|
} DC_filter_state_type;
|
|
|
|
typedef struct // filter in collection
|
|
{
|
|
const IIR_BIQUAD_FILTER_TYPE type;
|
|
const float32_t *coeffs; // Coefficients converted to ARMA in reverse order by MATLAB
|
|
const uint8_t stages;
|
|
const uint16_t width;
|
|
} IIR_BIQUAD_FILTER;
|
|
|
|
// Public variables
|
|
extern arm_fir_instance_f32 FIR_RX_Hilbert_I; // filter instances
|
|
extern arm_fir_instance_f32 FIR_RX_Hilbert_Q;
|
|
extern arm_fir_instance_f32 FIR_TX_Hilbert_I;
|
|
extern arm_fir_instance_f32 FIR_TX_Hilbert_Q;
|
|
extern arm_biquad_cascade_df2T_instance_f32 IIR_RX_LPF_I;
|
|
extern arm_biquad_cascade_df2T_instance_f32 IIR_RX_LPF_Q;
|
|
extern arm_biquad_cascade_df2T_instance_f32 IIR_RX_GAUSS;
|
|
extern arm_biquad_cascade_df2T_instance_f32 IIR_TX_LPF_I;
|
|
extern arm_biquad_cascade_df2T_instance_f32 IIR_TX_LPF_Q;
|
|
extern arm_biquad_cascade_df2T_instance_f32 IIR_RX_HPF_I;
|
|
extern arm_biquad_cascade_df2T_instance_f32 IIR_RX_HPF_Q;
|
|
extern arm_biquad_cascade_df2T_instance_f32 IIR_TX_HPF_I;
|
|
extern arm_biquad_cascade_df2T_instance_f32 IIR_TX_HPF_Q;
|
|
extern arm_biquad_cascade_df2T_instance_f32 IIR_RX_Squelch_HPF;
|
|
extern arm_biquad_cascade_df2T_instance_f32 EQ_RX_LOW_FILTER;
|
|
extern arm_biquad_cascade_df2T_instance_f32 EQ_RX_MID_FILTER;
|
|
extern arm_biquad_cascade_df2T_instance_f32 EQ_RX_HIG_FILTER;
|
|
extern arm_biquad_cascade_df2T_instance_f32 EQ_MIC_LOW_FILTER;
|
|
extern arm_biquad_cascade_df2T_instance_f32 EQ_MIC_MID_FILTER;
|
|
extern arm_biquad_cascade_df2T_instance_f32 EQ_MIC_HIG_FILTER;
|
|
extern volatile bool NeedReinitAudioFilters; // need to reinitialize the Audio filters
|
|
|
|
//Public methods
|
|
extern void InitAudioFilters(void); // initialize audio filters
|
|
extern void ReinitAudioFilters(void); // reinitialize audio filters
|
|
extern void dc_filter(float32_t *Buffer, int16_t blockSize, uint8_t stateNum); // start DC corrector
|
|
|
|
#endif
|