CWToneGen
newCWToneGen (
REAL gain, // dB
REAL freq, // ms
REAL rise, // ms
REAL fall, // ms
int size, // samples
REAL samplerate) // samples/sec
{
CWToneGen cwt = (CWToneGen) safealloc (1, sizeof (CWToneGenDesc),
"CWToneGenDesc");
setCWToneGenVals (cwt, gain, freq, rise, fall);
cwt->size = size;
cwt->sr = samplerate;
cwt->osc.gen = newOSC (cwt->size,
ComplexTone,
(double) cwt->osc.freq, 0.0, cwt->sr, "CWTone osc");
// overload oscillator buf
cwt->buf = newCXB (cwt->size, OSCCbase (cwt->osc.gen), "CWToneGen buf");
return cwt;
}
DTTSPAGC
newDttSPAgc (AGCMODE mode,
COMPLEX * Vec,
int BufSize,
REAL Limit,
REAL attack,
REAL decay,
REAL slope,
REAL hangtime,
REAL samprate,
REAL MaxGain, REAL MinGain, REAL CurGain, char *tag)
{
DTTSPAGC a;
a = (DTTSPAGC) safealloc (1, sizeof (dttspagc), tag);
a->mode = mode;
a->attack = (REAL) (1.0 - exp (-1000.0 / (attack * samprate)));
a->one_m_attack = (REAL) exp (-1000.0 / (attack * samprate));
a->decay = (REAL) (1.0 - exp (-1000.0 / (decay * samprate)));
a->one_m_decay = (REAL) exp (-1000.0 / (decay * samprate));
a->fastattack = (REAL) (1.0 - exp (-1000.0 / (0.2 * samprate)));
a->one_m_fastattack = (REAL) exp (-1000.0 / (0.2 * samprate));
a->fastdecay = (REAL) (1.0 - exp (-1000.0 / (3.0 * samprate)));
a->one_m_fastdecay = (REAL) exp (-1000.0 / (3.0 * samprate));
strcpy (a->tag, tag);
a->mask = 2 * BufSize;
a->hangindex = a->indx = 0;
a->hangtime = hangtime * 0.001f;
a->hangthresh = 0.0;
a->sndx = (int) (samprate * attack * 0.003f);
a->fastindx = (int)(0.002f*samprate);
a->gain.fix = 10.0;
a->slope = slope;
a->gain.top = MaxGain;
a->hangthresh = a->gain.bottom = MinGain;
a->gain.fastnow = a->gain.old = a->gain.now = CurGain;
a->gain.limit = Limit;
a->buff = newCXB (BufSize, Vec, "agc in buffer");
a->circ = newvec_COMPLEX (a->mask, "circular agc buffer");
a->mask -= 1;
a->fasthang = 0;
a->fasthangtime = 0.1f*a->hangtime;
return a;
}
AMD
newAMD (REAL samprate,
REAL f_initial,
REAL f_lobound,
REAL f_hibound,
REAL f_bandwid,
int size, COMPLEX * ivec, COMPLEX * ovec, AMMode mode, char *tag)
{
AMD am = (AMD) safealloc (1, sizeof (AMDDesc), tag);
am->size = size;
am->ibuf = newCXB (size, ivec, tag);
am->obuf = newCXB (size, ovec, tag);
am->mode = mode;
init_pll (am, samprate, f_initial, f_lobound, f_hibound, f_bandwid);
am->lock.curr = 0.5;
am->lock.prev = 1.0;
am->dc = 0.0;
return am;
}
void
init_spectrum (SpecBlock * sb)
{
REAL phase_tmp = 0.0;
REAL gain_tmp = 1.0;
COMPLEX *p;
sb->fill = 0;
p = newvec_COMPLEX_fftw(sb->size*16,"spectrum accum");
sb->accum = newCXB (sb->size * 16, p, "spectrum accum");
p = newvec_COMPLEX_fftw(sb->size, "spectrum timebuf");
sb->timebuf = newCXB (sb->size, p, "spectrum timebuf");
p = newvec_COMPLEX_fftw(sb->size, "spectrum timebuf");
sb->freqbuf = newCXB (sb->size, p, "spectrum freqbuf");
sb->window = newvec_REAL (sb->size * 16, "spectrum window");
makewindow (BLACKMANHARRIS_WINDOW, sb->size, sb->window);
sb->mask = sb->size - 1;
sb->polyphase = FALSE;
sb->output =
(float *) safealloc (sb->size, sizeof (float), "spectrum output");
sb->coutput = (COMPLEX *)safealloc (sb->size, sizeof (COMPLEX), "spectrum output");;
sb->plan =
fftwf_plan_dft_1d (sb->size, (fftwf_complex *) CXBbase (sb->timebuf),
(fftwf_complex *) CXBbase (sb->freqbuf),
FFTW_FORWARD, sb->planbits);
sb->iqfix = newCorrectIQspec2(); // SV1EIA AIR
sb->iqfix->buffer_counter = 0; // SV1EIA AIR
sb->iqfix->im_max_actual = 0; // SV1EIA AIR
sb->iqfix->im_max_test = 0; // SV1EIA AIR
sb->iqfix->im_min_actual = 0; // SV1EIA AIR
sb->iqfix->im_min_test = 0; // SV1EIA AIR
sb->iqfix->re_max_actual = 0; // SV1EIA AIR
sb->iqfix->re_max_test = 0; // SV1EIA AIR
sb->iqfix->re_min_actual = 0; // SV1EIA AIR
sb->iqfix->re_min_test = 0; // SV1EIA AIR
}
void
init_spectrum (SpecBlock * sb)
{
COMPLEX *p;
sb->fill = 0;
p = newvec_COMPLEX_16(sb->size*16,"spectrum accum");
sb->accum = newCXB (sb->size * 16, p, "spectrum accum");
p = newvec_COMPLEX_16(sb->size, "spectrum timebuf");
sb->timebuf = newCXB (sb->size, p, "spectrum timebuf");
p = newvec_COMPLEX_16(sb->size, "spectrum timebuf");
sb->freqbuf = newCXB (sb->size, p, "spectrum freqbuf");
sb->window = newvec_REAL (sb->size * 16, "spectrum window");
makewindow (BLACKMANHARRIS_WINDOW, sb->size, sb->window);
sb->mask = sb->size - 1;
sb->polyphase = FALSE;
sb->output =
(float *) safealloc (sb->size, sizeof (float), "spectrum output");
sb->coutput = (COMPLEX *)safealloc (sb->size, sizeof (COMPLEX), "spectrum output");;
sb->plan =
fftwf_plan_dft_1d (sb->size, (fftwf_complex *) CXBbase (sb->timebuf),
(fftwf_complex *) CXBbase (sb->freqbuf),
FFTW_FORWARD, sb->planbits);
}
WSCompander
newWSCompander (int npts, REAL fac, CXB buff)
{
WSCompander wsc;
wsc = (WSCompander) safealloc (1,
sizeof (WSCompanderInfo),
"WSCompander struct");
wsc->npts = npts;
wsc->nend = npts - 1;
wsc->tbl = newvec_REAL (npts, "WSCompander table");
wsc->buff = newCXB (CXBsize (buff), CXBbase (buff), "WSCompander buff");
WSCReset (wsc, fac);
return wsc;
}
/* ---------------------------------------------------------------------------- */
FMD
newFMD(REAL samprate,
REAL f_initial,
REAL f_lobound,
REAL f_hibound,
REAL f_bandwid,
int size,
COMPLEX *ivec,
COMPLEX *ovec,
char *tag) {
FMD fm = (FMD) safealloc(1, sizeof(FMDDesc), tag);
fm->size = size;
fm->ibuf = newCXB(size, ivec, tag);
fm->obuf = newCXB(size, ovec, tag);
init_pll(fm, samprate, f_initial, f_lobound, f_hibound, f_bandwid);
fm->lock = 0.5;
fm->afc = 0.0;
fm->cvt = (REAL) (0.45 * samprate / (M_PI * f_bandwid));
return fm;
}
LMSR
new_lmsr (CXB signal,
int delay,
REAL adaptation_rate,
REAL leakage, int adaptive_filter_size, int filter_type)
{
LMSR lms = (LMSR) safealloc (1, sizeof (_lmsstate), "new_lmsr state");
lms->signal = newCXB(signal->size,CXBbase(signal),"lmadf CXB");
lms->signal_size = CXBsize (lms->signal);
lms->delay = delay;
lms->size = 4096;
lms->mask = lms->size - 1;
lms->delay_line = newvec_COMPLEX (lms->size, "lmsr delay");
lms->adaptation_rate = adaptation_rate;
lms->leakage = leakage;
lms->adaptive_filter_size = adaptive_filter_size;
lms->adaptive_filter = newvec_COMPLEX (128, "lmsr filter");
lms->filter_type = filter_type;
lms->delay_line_ptr = 0;
return lms;
}
SpotToneGen
newSpotToneGen (REAL gain, // dB
REAL freq, REAL rise, // ms
REAL fall, // ms
int size, REAL samplerate)
{
SpotToneGen st = (SpotToneGen) safealloc (1,
sizeof (SpotToneGenDesc),
"SpotToneGenDesc");
setSpotToneGenVals (st, gain, freq, rise, fall);
st->size = size;
st->sr = samplerate;
st->osc.gen = newOSC (st->size,
ComplexTone,
st->osc.freq, 0.0, st->sr, "SpotTone osc");
// overload oscillator buf
st->buf = newCXB (st->size, OSCCbase (st->osc.gen), "SpotToneGen buf");
return st;
}
DTTSPAGC
newDttSPAgc (AGCMODE mode,
COMPLEX *Vec,
int BufSize, // Size of the input buffer
REAL target, // The target voltage
REAL attack, // Attack time constant in msec
REAL decay, // Decay time constant in msec
REAL slope, // Rate of change of gain after agc threshold is exceeded
REAL hangtime, // Hang Time in msec where NO decay is allowed in the agc
REAL samprate, // Sample Rate so time can be turned into sample number
REAL MaxGain, // Maximum allowable gain
REAL MinGain, // Minimum gain (can be -dB / less than 1.0 as in ALC or strong signals on receive
REAL CurGain, // The initial gain setting
char *tag) // String to emit when error conditions occur
{
DTTSPAGC a;
a = (DTTSPAGC) safealloc (1, sizeof (dttspagc), tag);
a->mode = mode;
// Attack: decrease gain when input signal will produce an output signal above the target voltage
// Decay: increase gain when input signal will produce an output signal below the target voltage
// Compute exponential attack rate per sample from attack time and sampler rate.
a->attack = (REAL) (1.0 - exp (-1000.0 / (attack * samprate)));
// Compute 1.0 - attack time.
a->one_m_attack = (REAL) (1.0 - a->attack);
// Compute exponential decay rate per sample from attack time and sampler rate.
a->decay = (REAL) (1.0 - exp (-1000.0 / (decay * samprate)));
// Compute 1.0 - decay time.
a->one_m_decay = (REAL) (1.0 - a->decay);
// Our system has a two track agc response. The normal one found in most receive
// systems is the determined from the calculations we just made.
// Ours has a fast track agc which is designed to prevent large pulse signals from pushing
// us into serious attack and wait for a long decay when the signal is short duration < 3 time constants for attack
// Compute exponential fast attack rate per sample from fast attack time and sampler rate.
a->fastattack = (REAL) (1.0 - exp (-1000.0 / (0.2 * samprate)));
// Compute 1.0 - fast attack time.
a->one_m_fastattack = (REAL) (1.0 - a->fastattack);
// Compute exponential fast decay rate per sample from fast attack time and sampler rate.
a->fastdecay = (REAL) (1.0 - exp (-1000.0 / (3.0 * samprate)));
// Compute 1.0 - fast decay time.
a->one_m_fastdecay = (REAL) (1.0 - a->fastdecay);
// Save the error identification message
strcpy (a->tag, tag);
// This computes the index max for our circular buffer
a->mask = 2 * BufSize - 1;
// Hangtime: This is a period of NO allowed decay even though we need to increase gain to stay at target level
// hangindex is used to compute how deep into the hang interval we are.
a->hangindex = a->slowindx = 0;
// Change hang time to hang length in samples using time and sample rate.
a->hangtime = hangtime * 0.001f;
//a->hangthresh = 0.0; // not neccessary?
// We BEGIN applying decreasing gain 3 time constants ahead of the signals arrival to narrow the modulation
// spread arising from modulating the signal with the agc gain. The index to application of computed gain
// sndx and it is computed as number of samples in 3 attack time constants
a->out_indx = (int) (samprate * attack * 0.003f);
// We do the same anticipation in the fast channel but we only do two time constants.
a->fastindx = (int)(0.0027f*samprate);
// see update.c:SetRAGC()
a->gain.fix = 10000.0;
// Slope: The rate at which gain is decreased as signal strength increases after it exceeds the agc threshold
// that is, after the required gain to reach the desired output level is LESS THAN the maximum allowable gain.
a->slope = slope;
// gain.top = Maxgain which is the maximum allowable gain. This determines the agc threshold
a->gain.top = MaxGain;
// gain.bottom = MinGain is the minimum allowable gain. If < 0dB or 1.0, then this is an attenuation.
a->hangthresh = a->gain.bottom = MinGain;
// Initialize the gain state to an initial value
a->gain.fastnow = a->gain.old = a->gain.now = CurGain;
// Set the target voltage.
a->gain.target = target;
// Given the vector of input samples, make a local complex buffer (struct to handle metadata associated with
// the vector or array of samples
a->buff = newCXB (BufSize, Vec, "agc in buffer");
// Use a circular buffer for efficiency in dealing with the anticipatory part of the agc algorithm
a->circ = newvec_COMPLEX (2 * BufSize, "circular agc buffer");
// intialize fast hang index to 0
a->fasthang = 0;
// Whatever the hangtime is for the slow channel, make the fast agc channel hangtime 10% of it
a->fasthangtime = 0.1f*a->hangtime;
return a;
}
CTX::CTX(unsigned int bufLen, unsigned int bits, float sampleRate, CMeter* meter, CSpectrum* spectrum, bool swapIQ) :
m_sampleRate(sampleRate),
m_meter(meter),
m_spectrum(spectrum),
m_type(SPEC_TX_POST_FILT),
m_swapIQ(swapIQ),
m_iBuf(NULL),
m_oBuf(NULL),
m_iq(NULL),
m_dcBlock(NULL),
m_dcBlockFlag(true),
m_oscillator1(NULL),
m_oscillator2(NULL),
m_filter(NULL),
m_modulator(NULL),
m_amModulator(NULL),
m_fmModulator(NULL),
m_ssbModulator(NULL),
m_alc(NULL),
m_micGain(0.0F),
m_power(0.0F),
m_speechProc(NULL),
m_speechProcFlag(false),
m_equaliser(NULL),
m_equaliserFlag(false),
m_mode(USB),
m_weaver(true),
m_freq(0.0),
m_lowFreq(0.0),
m_highFreq(0.0),
m_tick(0UL)
{
wxASSERT(meter != NULL);
wxASSERT(spectrum != NULL);
m_filter = new CFilterOVSV(bufLen, bits, sampleRate, 300.0F, 3000.0F);
m_iBuf = newCXB(m_filter->fetchSize(), m_filter->fetchPoint());
m_oBuf = newCXB(m_filter->storeSize(), m_filter->storePoint());
m_iq = new CCorrectIQ(m_oBuf);
m_dcBlock = new CDCBlock(m_iBuf);
m_oscillator1 = new COscillator(m_oBuf, sampleRate);
m_oscillator2 = new COscillator(m_iBuf, sampleRate);
m_amModulator = new CAMMod(0.5F, m_iBuf);
m_fmModulator = new CFMMod(5000.0F, sampleRate, m_iBuf);
m_ssbModulator = new CSSBMod(m_iBuf);
m_modulator = m_ssbModulator;
m_alc = new CAGC(agcLONG, // mode kept around for control reasons alone
m_iBuf, // input buffer
1.2F, // Target output
2.0F, // Attack time constant in ms
10.0F, // Decay time constant in ms
1.0F, // Slope
500.0F, //Hangtime in ms
sampleRate, // Sample rate
1.0F, // Maximum gain as a multipler, linear not dB
0.000001F, // Minimum gain as a multipler, linear not dB
1.0); // Set the current gain
m_speechProc = new CSpeechProc(0.4F, 3.0, m_iBuf);
m_equaliser = new CEqualiser(sampleRate, bits, m_iBuf);
}
