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WIP, new demodulator chain class 

git-svn-id: https://hamlib.svn.sourceforge.net/svnroot/hamlib/trunk@1549 7ae35d74-ebe9-4afe-98af-79ac388436b8
Hamlib-1.2.0
Stéphane Fillod, F8CFE 2003-09-28 20:51:05 +00:00
rodzic 106dbb55e0
commit 6dd08088ca
5 zmienionych plików z 193 dodań i 374 usunięć
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2
gnuradio/Makefile.am
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@ -9,7 +9,7 @@ hamlib_gnuradio_la_LDFLAGS = -no-undefined -module -avoid-version
# requires libgnuradio, libfftw and c++
hamlib_gnuradio_la_LIBADD = $(top_builddir)/src/libhamlib.la @GNURADIO_LIBS@ -lstdc++ -lpthread
noinst_HEADERS = gnuradio.h gr_priv.h
noinst_HEADERS = gnuradio.h gr_priv.h demod.h nfm.h am.h
check_PROGRAMS = testgr

48
gnuradio/am.h 100644
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@ -0,0 +1,48 @@
/*
* Hamlib GNUradio backend - AM class
* Copyright (c) 2003 by Stephane Fillod
*
* $Id: am.h,v 1.1 2003-09-28 20:51:05 fillods Exp $
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef _AM_H
#define _AM_H 1
#include "demod.h"
#include <GrMagnitude.h> /* AM */
class AMDemodChainCF : public DemodChainCF {
private:
GrMagnitude<d_iType, d_oType> *a_demod;
public:
AMDemodChainCF (VrSource<d_iType> *src, VrSink<d_oType> *snk, rmode_t mode, pbwidth_t width, int input_rate, freq_t centerfreq = 0) :
DemodChainCF(src, snk, mode, width, input_rate, centerfreq) {
demod_in = demod_out = a_demod = new GrMagnitude<d_iType, d_oType>();
}
~AMDemodChainCF() { delete a_demod; }
//void setWidth(pbwidth_t width) { }
//void setFreq(freq_t centerfreq) { }
void setRFgain(float gain) { /* a_demod->setGain(gain); */ }
};
#endif /* _AM_H */

421
gnuradio/gnuradio.cc
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@ -3,7 +3,7 @@
* Hamlib GNUradio backend - main file
* Copyright (c) 2001-2003 by Stephane Fillod
*
* $Id: gnuradio.cc,v 1.6 2003-09-28 15:59:27 fillods Exp $
* $Id: gnuradio.cc,v 1.7 2003-09-28 20:51:05 fillods Exp $
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
@ -36,8 +36,9 @@
#include <GrAudioSink.h>
#include <VrFileSink.h>
#include <VrFixOffset.h>
#include <make_GrMC4020Source.h>
#include <VrFixOffset.h>
#include <GrConvertSF.h>
#include <VrConnect.h>
#include <VrMultiTask.h>
@ -52,6 +53,11 @@
#include <gr_firdes.h>
#include <gr_fir_builderF.h>
/* Demodulator chains */
#include <nfm.h>
#include <am.h>
/* Chirp param's */
#define CARRIER_FREQ 1.070e6 // AM 1070
@ -143,7 +149,6 @@ int gr_init(RIG *rig)
priv->m = NULL;
priv->sink = NULL;
priv->source = NULL;
priv->need_fixer = 0;
for (i=0; i<NUM_CHAN; i++) {
init_chan(rig, RIG_VFO_N(i), &priv->chans[i]);
@ -274,7 +279,6 @@ int gr_open(RIG *rig)
#if 0
if (!priv->source) {
priv->source = new VrFileSource<short>(priv->input_rate, "/tmp/fm95_5_half.dat", true);
priv->need_fixer = 1;
}
// Chirp
if (!priv->source)
@ -284,12 +288,6 @@ int gr_open(RIG *rig)
/* VrFileSource (double sampling_freq, const char *file, bool repeat = false) */
//priv->source = new VrFileSource<short>(priv->input_rate, "microtune_source.sw", true);
// short --> short
if (priv->need_fixer) {
priv->offset_fixer = new VrFixOffset<short,short>();
NWO_CONNECT (priv->source, priv->offset_fixer);
}
priv->sink = new GrAudioSink<float>(1,AUDIO_IN);
/* ** Sink ** */
@ -331,9 +329,18 @@ int mc4020_open(RIG *rig)
struct gnuradio_priv_data *priv = (struct gnuradio_priv_data*)rig->state.priv;
/* input sample rate from PCI-DAS4020/12: 20000000 */
#if 0
priv->source = make_GrMC4020SourceS(priv->input_rate, MCC_CH3_EN | MCC_ALL_1V);
#endif
priv->mc4020_source = make_GrMC4020SourceS(priv->input_rate, MCC_CH3_EN | MCC_ALL_1V);
// short --> short
priv->offset_fixer = new VrFixOffset<short,short>();
// short --> float
priv->convert_SF = new GrConvertSF();
NWO_CONNECT (priv->mc4020_source, priv->offset_fixer);
NWO_CONNECT (priv->offset_fixer, priv->convert_SF);
NWO_CONNECT (priv->convert_SF, priv->source);
return gr_open(rig);
}
@ -396,13 +403,10 @@ int gr_close(RIG *rig)
delete priv->m;
delete priv->sink;
delete priv->source;
if (priv->need_fixer)
delete priv->offset_fixer;
priv->m = NULL;
priv->sink = NULL;
priv->source = NULL;
priv->need_fixer = 0;
rig_close(priv->tuner);
@ -452,9 +456,12 @@ static int update_freq(RIG *rig, unsigned chan_num, freq_t tuner_freq, freq_t fr
{
struct gnuradio_priv_data *priv = (struct gnuradio_priv_data *)rig->state.priv;
channel_t *chan = &priv->chans[chan_num];
struct mod_data *mod = &priv->mods[chan_num];
DemodChainCF *mod = priv->mods[chan_num];
double freq_offset;
if (chan->mode == RIG_MODE_NONE)
return RIG_OK;
/*
* In case the tuner is not a real tuner
*/
@ -468,29 +475,18 @@ static int update_freq(RIG *rig, unsigned chan_num, freq_t tuner_freq, freq_t fr
if (freq_offset == 0)
return RIG_OK; /* nothing to do */
/* TODO: change mode plumbing (don't forget locking!)
* workaround?: set_mode(NONE), set_mode(previous)
*/
/* mode=RIG_MODE_NONE? */
if (!mod) {
return RIG_OK;
}
pthread_mutex_lock(&priv->mutex_process);
switch (chan->mode) {
case RIG_MODE_WFM:
case RIG_MODE_FM:
case RIG_MODE_USB:
/* not so sure about if setCenter_Freq is the Right thing to do(tm). */
mod->chan_filter->setCenterFreq(priv->IF_center_freq + freq_offset);
break;
/*
* set_freq for SSB mod
* mod->ssb.shifter->set_freq(2*M_PI*freq_offset/(double)priv->input_rate);
*/
case RIG_MODE_NONE:
break;
default:
rig_debug(RIG_DEBUG_WARN, "%s: mode %s unimplemented!\n",
__FUNCTION__, strrmode(chan->mode));
break;
}
/*
* not so sure about if setCenter_Freq is the Right thing to do(tm).
*/
mod->setFreq((freq_t)(priv->IF_center_freq + freq_offset));
pthread_mutex_unlock(&priv->mutex_process);
return RIG_OK;
@ -574,7 +570,7 @@ int gr_set_mode(RIG *rig, vfo_t vfo, rmode_t mode, pbwidth_t width)
struct gnuradio_priv_data *priv = (struct gnuradio_priv_data *)rig->state.priv;
int chan_num = vfo2chan_num(rig, vfo);
channel_t *chan = &priv->chans[chan_num];
struct mod_data *mod = &priv->mods[chan_num];
DemodChainCF *mod = priv->mods[chan_num];
char buf[16];
freq_t tuner_freq;
int ret = RIG_OK;
@ -589,10 +585,6 @@ int gr_set_mode(RIG *rig, vfo_t vfo, rmode_t mode, pbwidth_t width)
if (mode == chan->mode && width == chan->width)
return RIG_OK;
/*
* TODO: check if only change in width
*/
ret = rig_get_freq(priv->tuner, RIG_VFO_CURR, &tuner_freq);
if (ret != RIG_OK)
@ -607,293 +599,70 @@ int gr_set_mode(RIG *rig, vfo_t vfo, rmode_t mode, pbwidth_t width)
rig_debug(RIG_DEBUG_VERBOSE, "%s: freq_offset=%g\n",
__FUNCTION__, freq_offset);
pthread_mutex_lock(&priv->mutex_process);
/* Same mode, but different width */
if (mode != RIG_MODE_NONE && mode == chan->mode) {
mod->setWidth(width);
chan->width = width;
pthread_mutex_unlock(&priv->mutex_process);
return RIG_OK;
}
priv->m->stop();
/* TODO: destroy GNUradio connections beforehand if different mode? */
if (chan->mode != RIG_MODE_NONE && mode != chan->mode) {
switch (chan->mode) {
#if 0
case RIG_MODE_WFM:
delete mod->demod.wfm.demod;
delete mod->chan_filter;
delete mod->audio_filter;
break;
#endif
case RIG_MODE_FM:
case RIG_MODE_USB:
case RIG_MODE_LSB:
case RIG_MODE_AM:
delete mod->mixer;
delete mod->demod;
delete mod->gainstage;
break;
default:
break;
}
delete mod;
priv->mods[chan_num] = NULL;
}
/* TODO: if same mode, but different width, then adapt */
priv->m->stop();
switch (mode) {
#if 0
case RIG_MODE_FM:
{
mod->CFIRdecimate = 20;
mod->CFIRdecimate2 = 25;
mod->RFIRdecimate = 5;
const float channelSpacing = 80e3;
const float demodBW = 3e3;
const float TAU = 75e-6; // 75us in US, 50us in EUR
const int quadRate = priv->input_rate / mod->CFIRdecimate / mod->CFIRdecimate2;
const int audioRate = quadRate / mod->RFIRdecimate;
//
// design first stage selection filter
//
// width of transition band.
//
// We make this twice as wide as you would think. This allows
// some aliasing, but it's outside our final bandwidth, determined
// by the next filter
float transition_width = (priv->input_rate / mod->CFIRdecimate - width);
vector<float> cs1_coeffs =
gr_firdes::low_pass (1.0, // gain
priv->input_rate, // sampling rate
width / 2, // low-pass cutoff freq
transition_width,
gr_firdes::WIN_HANN);
cerr << "Number of cs1_coeffs: " << cs1_coeffs.size () << endl;
//
// design second stage channel selection filter
//
// This is the one that we tune
//
vector<float> cs2_coeffs =
gr_firdes::low_pass (1.0,
priv->input_rate / mod->CFIRdecimate,
width / 2,
(channelSpacing - width) / 2,
gr_firdes::WIN_HANN);
cerr << "Number of cs2_coeffs: " << cs2_coeffs.size () << endl;
//
// design audio filter
//
vector<float> audio_coeffs =
gr_firdes::band_pass (1e3, // gain
quadRate, // sampling rate
300,
demodBW,
250,
gr_firdes::WIN_HAMMING);
cerr << "Number of audio_coeffs: " << audio_coeffs.size () << endl;
//
// design demphasis filter
//
vector<double> fftaps = vector<double>(2);
vector<double> fbtaps = vector<double>(2);
fftaps[0] = 1 - exp(-1/(TAU*audioRate));
fftaps[1] = 0;
fbtaps[0] = 0;
fbtaps[1] = exp(-1/TAU/priv->input_rate*50);;
//
// now instantiate the modules
//
// short --> VrComplex
mod->chan_filter =
new GrFreqXlatingFIRfilterSCF (mod->CFIRdecimate,
cs1_coeffs,
priv->IF_center_freq - freq_offset);
// VrComplex --> VrComplex
mod->demod.fm.chan2_filter =
new GrFreqXlatingFIRfilterCCF (mod->CFIRdecimate2, cs2_coeffs, 0);
// VrComplex --> float
mod->demod.fm.demod = new VrQuadratureDemod<float>(1);
// float --> float
mod->audioF_filter = new GrFIRfilterFFF (mod->RFIRdecimate, audio_coeffs);
// float --> float
mod->demod.fm.deemph =
new GrIIRfilter<float,float,double> (1,fftaps,fbtaps);
// float --> short
mod->demod.fm.cfs = new GrConvertFS ();
//connect the modules together
NWO_CONNECT (GR_SOURCE(priv), mod->chan_filter);
NWO_CONNECT (mod->chan_filter, mod->demod.fm.chan2_filter);
NWO_CONNECT (mod->demod.fm.chan2_filter, mod->demod.fm.demod);
NWO_CONNECT (mod->demod.fm.demod, mod->audioF_filter);
NWO_CONNECT (mod->audioF_filter, mod->demod.fm.deemph);
NWO_CONNECT (mod->demod.fm.deemph, mod->demod.fm.cfs);
NWO_CONNECT (mod->demod.fm.cfs, priv->sink);
break;
}
#endif
#if 0
case RIG_MODE_WFM:
{
mod->CFIRdecimate = 125;
mod->RFIRdecimate = 5;
const int quadRate = priv->input_rate / mod->CFIRdecimate;
const int audioRate = quadRate / mod->RFIRdecimate;
rig_debug(RIG_DEBUG_VERBOSE, "Input Sampling Rate: %d\n", priv->input_rate);
rig_debug(RIG_DEBUG_VERBOSE, "Complex FIR decimation factor: %d\n", mod->CFIRdecimate);
rig_debug(RIG_DEBUG_VERBOSE, "QuadDemod Sampling Rate: %d\n", quadRate);
rig_debug(RIG_DEBUG_VERBOSE, "Real FIR decimation factor: %d\n", mod->RFIRdecimate);
rig_debug(RIG_DEBUG_VERBOSE, "Audio Sampling Rate: %d\n", audioRate);
// build channel filter
//
// note that the totally bogus transition width is because
// we don't have enough mips right now to really do the right thing.
// This results in a filter with 83 taps, which is just a few
// more than the original 75 in microtune_fm_demo.
vector<float> channel_coeffs =
gr_firdes::low_pass (1.0, // gain
priv->input_rate, // sampling rate
width, // low-pass cutoff: freq 250e3
8*100e3, // width of transition band
gr_firdes::WIN_HAMMING);
rig_debug(RIG_DEBUG_VERBOSE, "Number of channel_coeffs: %d\n", channel_coeffs.size ());
// short --> VrComplex
mod->chan_filter =
new GrFreqXlatingFIRfilterSCF(mod->CFIRdecimate, channel_coeffs,
priv->IF_center_freq - freq_offset);
// float --> short
double width_of_transition_band = audioRate / 32;
vector<float> audio_coeffs =
gr_firdes::low_pass (1.0, // gain
quadRate, // sampling rate
audioRate/2 - width_of_transition_band, // low-pass cutoff freq
width_of_transition_band,
gr_firdes::WIN_HAMMING);
rig_debug(RIG_DEBUG_VERBOSE, "Number of audio_coeffs: %d\n", audio_coeffs.size ());
rig_debug(RIG_DEBUG_VERBOSE, "Low-pass cutoff freq: %d\n", audioRate/2 - (int)width_of_transition_band);
mod->audio_filter =
new GrFIRfilterFSF(mod->RFIRdecimate, audio_coeffs);
mod->demod.wfm.FMdemodGain = 2200;
float volume = chan->levels[rig_setting2idx(RIG_LEVEL_AF)].f;
//
// setup Wide FM demodulator chain
//
// VrComplex --> float
mod->demod.wfm.demod =
new VrQuadratureDemod<float>(volume * mod->demod.wfm.FMdemodGain);
//connect the modules together
NWO_CONNECT (GR_SOURCE(priv), mod->chan_filter);
NWO_CONNECT (mod->chan_filter, mod->demod.wfm.demod);
NWO_CONNECT (mod->demod.wfm.demod, mod->audio_filter);
NWO_CONNECT (mod->audio_filter, priv->sink);
break;
}
#endif
case RIG_MODE_USB:
{
float rf_gain = chan->levels[rig_setting2idx(RIG_LEVEL_RF)].f;
float low_cutoff = 300;
float high_cutoff = low_cutoff+width;
mod->centerfreq = (freq_t)(priv->IF_center_freq + low_cutoff + width/2);
/* GrSSBMod<short>(2*M_PI*freq_offset/(double)priv->input_rate, rf_gain); */
mod->demod = new GrSSBMod<float>(2*M_PI*(low_cutoff+width/2)/(double)priv->input_rate,rf_gain);
break;
}
case RIG_MODE_AM:
{
float volume = chan->levels[rig_setting2idx(RIG_LEVEL_AF)].f;
mod->centerfreq = priv->IF_center_freq;
// VrComplex --> float
mod->demod = new GrMagnitude<VrComplex,float>();
break;
}
case RIG_MODE_FM:
{
float volume = chan->levels[rig_setting2idx(RIG_LEVEL_AF)].f;
mod->centerfreq = kHz(10);
// VrComplex --> float
mod->demod = new VrQuadratureDemod<float>(1);
break;
}
case RIG_MODE_NONE:
if (mode == RIG_MODE_NONE) {
/* ez */
chan->mode = mode;
chan->width = width;
pthread_mutex_unlock(&priv->mutex_process);
return ret;
return RIG_OK;
}
switch(mode) {
#if 0
case RIG_MODE_USB:
//float rf_gain = chan->levels[rig_setting2idx(RIG_LEVEL_RF)].f;
float low_cutoff = 300;
float high_cutoff = low_cutoff+width;
centerfreq = (freq_t)(priv->IF_center_freq + low_cutoff + width/2);
mod = new USBDemodChain(priv->source, priv->sink, priv->input_rate, centerfreq);
break;
#endif
case RIG_MODE_AM:
//centerfreq = priv->IF_center_freq;
mod = new AMDemodChainCF(priv->source, priv->sink, mode, width, priv->input_rate, kHz(10));
break;
case RIG_MODE_FM:
//centerfreq = priv->IF_center_freq;
mod = new FMDemodChainCF(priv->source, priv->sink, mode, width, priv->input_rate, kHz(10));
break;
default:
ret = -RIG_EINVAL;
}
// change_filt();
vector<float> channel_coeffs =
gr_firdes::low_pass (1.0, // gain
priv->input_rate, // sampling rate
width/2, // low-pass cutoff freq
300, // width of transition band
gr_firdes::WIN_HAMMING);
mod->mixer = new GrFreqXlatingFIRfilterCCF (1, channel_coeffs, mod->centerfreq);
mod->gainstage = new VrAmp<float,float>(1);
NWO_CONNECT (GR_SOURCE(priv), mod->mixer);
NWO_CONNECT (mod->mixer, mod->demod);
NWO_CONNECT (mod->demod, mod->gainstage);
NWO_CONNECT (mod->gainstage, priv->sink);
priv->mods[chan_num] = mod;
mod->connect();
priv->m->add (priv->sink);
priv->m->start();
pthread_mutex_unlock(&priv->mutex_process);
if (ret == RIG_OK) {
chan->mode = mode;
chan->width = width;
@ -945,42 +714,14 @@ int gr_get_vfo(RIG *rig, vfo_t *vfo)
return RIG_OK;
}
static int set_rf_gain(RIG *rig, channel_t *chan, struct mod_data *mod, float gain)
{
struct gnuradio_priv_data *priv = (struct gnuradio_priv_data *)rig->state.priv;
pthread_mutex_lock(&priv->mutex_process);
switch (chan->mode) {
case RIG_MODE_USB:
{
//mod->ssb.shifter->set_gain(gain);
break;
}
case RIG_MODE_NONE:
break;
case RIG_MODE_WFM:
case RIG_MODE_FM:
/* chan_filter/VrComplexFIRfilter is missing a setGain method! */
default:
rig_debug(RIG_DEBUG_WARN, "%s: mode %s unimplemented!\n",
__FUNCTION__, strrmode(chan->mode));
break;
}
pthread_mutex_unlock(&priv->mutex_process);
return RIG_OK;
}
/*
* TODO:
* restart machinery after level change (e.g. volume, etc.)
*/
int gnuradio_set_level(RIG *rig, vfo_t vfo, setting_t level, value_t val)
{
struct gnuradio_priv_data *priv = (struct gnuradio_priv_data *)rig->state.priv;
int chan_num = vfo2chan_num(rig, vfo);
channel_t *chan = &priv->chans[chan_num];
struct mod_data *mod = &priv->mods[chan_num];
DemodChainCF *mod = priv->mods[chan_num];
char lstr[32];
int idx;
int ret = RIG_OK;
@ -997,9 +738,11 @@ int gnuradio_set_level(RIG *rig, vfo_t vfo, setting_t level, value_t val)
strlevel(level), lstr);
/* TODO: check val is in range */
pthread_mutex_lock(&priv->mutex_process);
switch (level) {
case RIG_LEVEL_RF:
ret = set_rf_gain(rig, chan, mod, val.f);
mod->setRFgain(val.f);
break;
default:
rig_debug(RIG_DEBUG_WARN, "%s: level %s unimplemented!\n",
@ -1007,6 +750,8 @@ int gnuradio_set_level(RIG *rig, vfo_t vfo, setting_t level, value_t val)
break;
}
pthread_mutex_unlock(&priv->mutex_process);
return ret;
}

48
gnuradio/gr_priv.h
Wyświetl plik

@ -2,7 +2,7 @@
* Hamlib GNUradio backend - gnuradio priv structure
* Copyright (c) 2001-2003 by Stephane Fillod
*
* $Id: gr_priv.h,v 1.5 2003-09-28 15:59:27 fillods Exp $
* $Id: gr_priv.h,v 1.6 2003-09-28 20:51:05 fillods Exp $
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
@ -27,38 +27,15 @@
#include <VrSink.h>
#include <VrMultiTask.h>
#include <VrFixOffset.h>
#include <GrFreqXlatingFIRfilterSCF.h>
#include <GrFreqXlatingFIRfilterCCF.h>
#include <GrFIRfilterFSF.h>
#include <VrQuadratureDemod.h> /* FM */
//#include <VrAmplitudeDemod.h> /* AM */
#include <GrIIRfilter.h>
#include <GrConvertFS.h>
#include <VrAmp.h>
#include <GrConvertSF.h>
/* SSB mod */
//#include <GrSSBMod.h>
//#include <GrHilbert.h>
#include <VrSource.h>
#include <pthread.h>
#include <hamlib/rig.h>
#include "hamlib/rig.h"
#include "demod.h"
#define IOTYPE short
struct mod_data {
freq_t centerfreq;
GrFreqXlatingFIRfilterCCF *mixer;
VrAmp<float,float> *gainstage;
VrSigProc *demod;
int CFIRdecimate;
int CFIRdecimate2;
int RFIRdecimate;
GrFreqXlatingFIRfilterSCF *chan_filter;
GrFIRfilterFSF *audio_filter;
GrFIRfilterFFF *audioF_filter;
};
#define NUM_CHAN 2 /* VFO A and VFO B */
@ -76,22 +53,23 @@ struct gnuradio_priv_data {
shortfreq_t input_rate;
shortfreq_t IF_center_freq;
VrSource<VrComplex> *source; /*< IF source */
VrFixOffset<IOTYPE,IOTYPE> *offset_fixer; /*< some sources need it */
VrSource<VrComplex> *source;
/* MC4020 */
VrSource<short> *mc4020_source;
VrFixOffset<short,short> *offset_fixer;
GrConvertSF *convert_SF;
VrSink<float> *sink; /*< Audio sink */
VrMultiTask *m;
int need_fixer; /*< always need Offset fixer ? */
pthread_t process_thread;
pthread_mutex_t mutex_process;
volatile int do_process; /*< flag to tell process thread to stop */
struct mod_data mods[NUM_CHAN]; /*< Modulation objects and stuff, one per channel */
DemodChainCF *mods[NUM_CHAN]; /*< Modulation objects and stuff, one per channel */
};
//#define GR_SOURCE(priv) ((priv)->need_fixer?(priv)->offset_fixer:(priv)->source)
//#define GR_SOURCE(priv) ((priv)->offset_fixer)
#define GR_SOURCE(priv) ((priv)->source)
//#define GR_MAX_FREQUENCY(priv) ((priv)->input_rate/2)
#define GR_MAX_FREQUENCY(priv) ((priv)->input_rate)

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gnuradio/nfm.h 100644
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/*
* Hamlib GNUradio backend - Narrow FM class
* Copyright (c) 2003 by Stephane Fillod
*
* $Id: nfm.h,v 1.1 2003-09-28 20:51:05 fillods Exp $
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef _NFM_H
#define _NFM_H 1
#include "demod.h"
#include <VrQuadratureDemod.h> /* FM */
class FMDemodChainCF : public DemodChainCF {
private:
VrQuadratureDemod<d_oType> *q_demod;
public:
FMDemodChainCF (VrSource<d_iType> *src, VrSink<d_oType> *snk, rmode_t mode, pbwidth_t width, int input_rate, freq_t centerfreq = 0) :
DemodChainCF(src, snk, mode, width, input_rate, centerfreq) {
demod_in = demod_out = q_demod = new VrQuadratureDemod<d_oType>(1);
}
~FMDemodChainCF() { delete q_demod; }
//void setWidth(pbwidth_t width) { }
//void setFreq(freq_t centerfreq) { }
void setRFgain(float gain) { q_demod->setGain(gain); }
};
#endif /* _NFM_H */