-
Notifications
You must be signed in to change notification settings - Fork 4
/
Copy pathFilter.cpp
250 lines (221 loc) · 11.8 KB
/
Filter.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
#ifndef BEENHERE
#include "SDT.h"
#endif
/*****
Purpose: void DoReceiveEQ Parameter list:
void
Return value;
void
*****/
void DoReceiveEQ() //AFP 08-09-22
{
for (int i = 0; i < 14; i++) {
recEQ_LevelScale[i] = (float)EEPROMData.equalizerRec[i] / 100.0;
}
arm_biquad_cascade_df2T_f32(&S1_Rec, float_buffer_L, rec_EQ1_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S2_Rec, float_buffer_L, rec_EQ2_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S3_Rec, float_buffer_L, rec_EQ3_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S4_Rec, float_buffer_L, rec_EQ4_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S5_Rec, float_buffer_L, rec_EQ5_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S6_Rec, float_buffer_L, rec_EQ6_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S7_Rec, float_buffer_L, rec_EQ7_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S8_Rec, float_buffer_L, rec_EQ8_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S9_Rec, float_buffer_L, rec_EQ9_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S10_Rec, float_buffer_L, rec_EQ10_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S11_Rec, float_buffer_L, rec_EQ11_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S12_Rec, float_buffer_L, rec_EQ12_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S13_Rec, float_buffer_L, rec_EQ13_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S14_Rec, float_buffer_L, rec_EQ14_float_buffer_L, 256);
arm_scale_f32(rec_EQ1_float_buffer_L, -recEQ_LevelScale[0], rec_EQ1_float_buffer_L, 256);
arm_scale_f32(rec_EQ2_float_buffer_L, recEQ_LevelScale[1], rec_EQ2_float_buffer_L, 256);
arm_scale_f32(rec_EQ3_float_buffer_L, -recEQ_LevelScale[2], rec_EQ3_float_buffer_L, 256);
arm_scale_f32(rec_EQ4_float_buffer_L, recEQ_LevelScale[3], rec_EQ4_float_buffer_L, 256);
arm_scale_f32(rec_EQ5_float_buffer_L, -recEQ_LevelScale[4], rec_EQ5_float_buffer_L, 256);
arm_scale_f32(rec_EQ6_float_buffer_L, recEQ_LevelScale[5], rec_EQ6_float_buffer_L, 256);
arm_scale_f32(rec_EQ7_float_buffer_L, -recEQ_LevelScale[6], rec_EQ7_float_buffer_L, 256);
arm_scale_f32(rec_EQ8_float_buffer_L, recEQ_LevelScale[7], rec_EQ8_float_buffer_L, 256);
arm_scale_f32(rec_EQ9_float_buffer_L, -recEQ_LevelScale[8], rec_EQ9_float_buffer_L, 256);
arm_scale_f32(rec_EQ10_float_buffer_L, recEQ_LevelScale[9], rec_EQ10_float_buffer_L, 256);
arm_scale_f32(rec_EQ11_float_buffer_L, -recEQ_LevelScale[10], rec_EQ11_float_buffer_L, 256);
arm_scale_f32(rec_EQ12_float_buffer_L, recEQ_LevelScale[11], rec_EQ12_float_buffer_L, 256);
arm_scale_f32(rec_EQ13_float_buffer_L, -recEQ_LevelScale[12], rec_EQ13_float_buffer_L, 256);
arm_scale_f32(rec_EQ14_float_buffer_L, recEQ_LevelScale[13], rec_EQ14_float_buffer_L, 256);
arm_add_f32(rec_EQ1_float_buffer_L , rec_EQ2_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ3_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ4_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ5_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ6_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ7_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ8_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ9_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ10_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ11_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ12_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ13_float_buffer_L, float_buffer_L , 256 ) ;
arm_add_f32(float_buffer_L , rec_EQ14_float_buffer_L, float_buffer_L , 256 ) ;
}
/*****
Purpose: void DoExciterEQ
Parameter list:
void
Return value;
void
*****/
void DoExciterEQ() //AFP 10-02-22
{
for (int i = 0; i < 14; i++) {
xmtEQ_Level[i] = (float)EEPROMData.equalizerXmt[i] / 100.0;
}
arm_biquad_cascade_df2T_f32(&S1_Xmt, float_buffer_L_EX, xmt_EQ1_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S2_Xmt, float_buffer_L_EX, xmt_EQ2_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S3_Xmt, float_buffer_L_EX, xmt_EQ3_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S4_Xmt, float_buffer_L_EX, xmt_EQ4_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S5_Xmt, float_buffer_L_EX, xmt_EQ5_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S6_Xmt, float_buffer_L_EX, xmt_EQ6_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S7_Xmt, float_buffer_L_EX, xmt_EQ7_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S8_Xmt, float_buffer_L_EX, xmt_EQ8_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S9_Xmt, float_buffer_L_EX, xmt_EQ9_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S10_Xmt, float_buffer_L_EX, xmt_EQ10_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S11_Xmt, float_buffer_L_EX, xmt_EQ11_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S12_Xmt, float_buffer_L_EX, xmt_EQ12_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S13_Xmt, float_buffer_L_EX, xmt_EQ13_float_buffer_L, 256);
arm_biquad_cascade_df2T_f32(&S14_Xmt, float_buffer_L_EX, xmt_EQ14_float_buffer_L, 256);
arm_scale_f32(xmt_EQ1_float_buffer_L, -xmtEQ_Level[0], xmt_EQ1_float_buffer_L, 256);
arm_scale_f32(xmt_EQ2_float_buffer_L, xmtEQ_Level[1], xmt_EQ2_float_buffer_L, 256);
arm_scale_f32(xmt_EQ3_float_buffer_L, -xmtEQ_Level[2], xmt_EQ3_float_buffer_L, 256);
arm_scale_f32(xmt_EQ4_float_buffer_L, xmtEQ_Level[3], xmt_EQ4_float_buffer_L, 256);
arm_scale_f32(xmt_EQ5_float_buffer_L, -xmtEQ_Level[4], xmt_EQ5_float_buffer_L, 256);
arm_scale_f32(xmt_EQ6_float_buffer_L, xmtEQ_Level[5], xmt_EQ6_float_buffer_L, 256);
arm_scale_f32(xmt_EQ7_float_buffer_L, -xmtEQ_Level[6], xmt_EQ7_float_buffer_L, 256);
arm_scale_f32(xmt_EQ8_float_buffer_L, xmtEQ_Level[7], xmt_EQ8_float_buffer_L, 256);
arm_scale_f32(xmt_EQ9_float_buffer_L, -xmtEQ_Level[8], xmt_EQ9_float_buffer_L, 256);
arm_scale_f32(xmt_EQ10_float_buffer_L, xmtEQ_Level[9], xmt_EQ10_float_buffer_L, 256);
arm_scale_f32(xmt_EQ11_float_buffer_L, -xmtEQ_Level[10], xmt_EQ11_float_buffer_L, 256);
arm_scale_f32(xmt_EQ12_float_buffer_L, xmtEQ_Level[11], xmt_EQ12_float_buffer_L, 256);
arm_scale_f32(xmt_EQ13_float_buffer_L, -xmtEQ_Level[12], xmt_EQ13_float_buffer_L, 256);
arm_scale_f32(xmt_EQ14_float_buffer_L, xmtEQ_Level[13], xmt_EQ14_float_buffer_L, 256);
arm_add_f32(xmt_EQ1_float_buffer_L , xmt_EQ2_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ3_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ4_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ5_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ6_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ7_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ8_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ9_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ10_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ11_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ12_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ13_float_buffer_L, float_buffer_L_EX , 256 ) ;
arm_add_f32(float_buffer_L_EX , xmt_EQ14_float_buffer_L, float_buffer_L_EX , 256 ) ;
}
/*****
Purpose: void FilterBandwidth() Parameter list:
void
Return value;
void
*****/
void FilterBandwidth()
{
AudioNoInterrupts();
CalcCplxFIRCoeffs(FIR_Coef_I, FIR_Coef_Q, m_NumTaps, (float32_t)bands[currentBand].FLoCut, (float32_t)bands[currentBand].FHiCut, (float)SR[SampleRate].rate / DF);
InitFilterMask();
// also adjust IIR AM filter
//int filter_BW_highest = bands[currentBand].FHiCut;
//if (filter_BW_highest < -bands[currentBand].FLoCut) {
// filter_BW_highest = -bands[currentBand].FLoCut;
// }
//SetIIRCoeffs((float32_t)filter_BW_highest, 1.3, (float32_t)SR[SampleRate].rate / DF, 0); // 1st stage
for (int i = 0; i < 5; i++) {
biquad_lowpass1_coeffs[i] = coefficient_set[i];
}
// and adjust decimation and interpolation filters
SetDecIntFilters();
ShowBandwidth();
//BandInformation();
MyDelay(1L);
AudioInterrupts();
} // end filter_bandwidth
/*****
Purpose: InitFilterMask()
Parameter list:
void
Return value;
void
*****/
void InitFilterMask()
{
/****************************************************************************************
Calculate the FFT of the FIR filter coefficients once to produce the FIR filter mask
****************************************************************************************/
// the FIR has exactly m_NumTaps and a maximum of (FFT_length / 2) + 1 taps = coefficients, so we have to add (FFT_length / 2) -1 zeros before the FFT
// in order to produce a FFT_length point input buffer for the FFT
// copy coefficients into real values of first part of buffer, rest is zero
for (unsigned i = 0; i < m_NumTaps; i++) {
// try out a window function to eliminate ringing of the filter at the stop frequency
// sd.FFT_Samples[i] = (float32_t)((0.53836 - (0.46164 * arm_cos_f32(PI*2 * (float32_t)i / (float32_t)(FFT_IQ_BUFF_LEN-1)))) * sd.FFT_Samples[i]);
FIR_filter_mask[i * 2] = FIR_Coef_I [i];
FIR_filter_mask[i * 2 + 1] = FIR_Coef_Q [i];
}
for (unsigned i = FFT_length + 1; i < FFT_length * 2; i++) {
FIR_filter_mask[i] = 0.0;
}
// FFT of FIR_filter_mask
// perform FFT (in-place), needs only to be done once (or every time the filter coeffs change)
arm_cfft_f32(maskS, FIR_filter_mask, 0, 1);
} // end init_filter_mask
/*****
Purpose: void control_filter_f()
Parameter list:
void
Return value;
void
*****/
void ControlFilterF()
{
// low Fcut must never be larger than high Fcut and vice versa
//== AFP 10-27-22
switch (bands[currentBand].mode) {
case DEMOD_IQ:
bands[currentBand].FLoCut = - bands[currentBand].FHiCut;
break;
case DEMOD_LSB:
if (bands[currentBand].FHiCut > 0) bands[currentBand].FHiCut = -100;
break;
case DEMOD_USB:
if (bands[currentBand].FLoCut < 0) bands[currentBand].FLoCut = 100; // AFP 10-27-22
break;
case DEMOD_AM:
bands[currentBand].FLoCut = - bands[currentBand].FHiCut;
//bands[currentBand].FHiCut= 4000;
break;
case DEMOD_SAM: //== AFP 11-04-22
bands[currentBand].FLoCut = - bands[currentBand].FHiCut;
break;
} //== AFP 10-27-22
}
/*****
Purpose: void SetDecIntFilters()
Parameter list:
void
Return value;
void
*****/
void SetDecIntFilters()
{
/****************************************************************************************
Recalculate decimation and interpolation FIR filters
****************************************************************************************/
int filter_BW_highest = bands[currentBand].FHiCut;
if (filter_BW_highest < - bands[currentBand].FLoCut) {
filter_BW_highest = - bands[currentBand].FLoCut;
}
LP_F_help = filter_BW_highest;
if (LP_F_help > 10000) {
LP_F_help = 10000;
}
CalcFIRCoeffs(FIR_dec1_coeffs, n_dec1_taps, (float32_t)(LP_F_help), n_att, 0, 0.0, (float32_t)(SR[SampleRate].rate));
CalcFIRCoeffs(FIR_dec2_coeffs, n_dec2_taps, (float32_t)(LP_F_help), n_att, 0, 0.0, (float32_t)(SR[SampleRate].rate / DF1));
CalcFIRCoeffs(FIR_int1_coeffs, 48, (float32_t)(LP_F_help), n_att, 0, 0.0, (float32_t)(SR[SampleRate].rate / DF1));
CalcFIRCoeffs(FIR_int2_coeffs, 32, (float32_t)(LP_F_help), n_att, 0, 0.0, (float32_t)SR[SampleRate].rate);
bin_BW = 1.0 / (DF * FFT_length) * (float32_t)SR[SampleRate].rate;
}