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127 lines
4.5 KiB
C++
127 lines
4.5 KiB
C++
/* nobII.h
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This file is part of a program that implements a Software-Defined Radio.
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Copyright (C) 2014 Warren Pratt, NR0V
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Copyright (C) 2024 Edouard Griffiths, F4EXB Adapted to SDRangel
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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The author can be reached by email at
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warren@wpratt.com
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*/
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#ifndef wdsp_nob_h
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#define wdsp_nob_h
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namespace WDSP {
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class RXA;
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class NOB
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{
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public:
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int run;
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int buffsize; // size of input/output buffer
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float* in; // input buffer
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float* out; // output buffer
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int mode;
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int dline_size; // length of delay line which is 'double dline[length][2]'
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double *dline; // pointer to delay line
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int *imp;
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double samplerate; // samplerate, used to convert times into sample counts
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double advslewtime; // transition time, signal<->zero
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double advtime; // deadtime (zero output) in advance of detected noise
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double hangslewtime;
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double hangtime; // time to stay at zero after noise is no longer detected
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double max_imp_seq_time;
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int filterlen;
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double *fcoefs;
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double *bfbuff;
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int bfb_in_idx;
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double *ffbuff;
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int ffb_in_idx;
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double backtau; // time constant used in averaging the magnitude of the input signal
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double threshold; // triggers if (noise > threshold * average_signal_magnitude)
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double *awave; // pointer to array holding transition waveform
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double *hwave;
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int state; // state of the state machine
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double avg; // average value of the signal magnitude
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int time; // count when decreasing the signal magnitude
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int adv_slew_count;
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int adv_count; // number of samples to equal 'tau' time
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int hang_count; // number of samples to equal 'hangtime' time
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int hang_slew_count; // number of samples to equal 'advtime' time
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int max_imp_seq;
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int blank_count;
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int in_idx; // ring buffer position into which new samples are inserted
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int scan_idx;
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int out_idx; // ring buffer position from which delayed samples are pulled
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double backmult; // multiplier for waveform averaging
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double ombackmult; // multiplier for waveform averaging
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double I1, Q1;
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double I2, Q2;
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double I, Q;
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double Ilast, Qlast;
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double deltaI, deltaQ;
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double Inext, Qnext;
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int overflow;
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double *legacy;
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//////////// legacy interface - remove
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static NOB* create_nob (
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int run,
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int buffsize,
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float* in,
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float* out,
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double samplerate,
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int mode,
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double advslewtime,
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double advtime,
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double hangslewtime,
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double hangtime,
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double max_imp_seq_time,
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double backtau,
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double threshold
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);
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static void destroy_nob (NOB* a);
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static void flush_nob (NOB* a);
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static void xnob (NOB* a);
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static void setBuffers_nob (NOB *a, float* in, float* out);
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static void setSamplerate_nob (NOB *a, int rate);
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static void setSize_nob (NOB *a, int size);
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// RXA
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static void SetNOBRun (RXA& rxa, int run);
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static void SetNOBMode (RXA& rxa, int mode);
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static void SetNOBBuffsize (RXA& rxa, int size);
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static void SetNOBSamplerate (RXA& rxa, int size);
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static void SetNOBTau (RXA& rxa, double tau);
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static void SetNOBHangtime (RXA& rxa, double time);
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static void SetNOBAdvtime (RXA& rxa, double time);
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static void SetNOBBacktau (RXA& rxa, double tau);
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static void SetNOBThreshold (RXA& rxa, double thresh);
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private:
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static void init_nob (NOB *a);
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};
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} // namespace
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#endif
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