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noise reduction work

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This commit is contained in:
AlexandreRouma 2023-03-27 01:50:34 +02:00
parent a9f882e5b1
commit 75050347de
12 changed files with 52 additions and 15 deletions
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2
core/src/dsp/convert/stereo_to_mono.h
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@ -9,7 +9,7 @@ namespace dsp::convert {
StereoToMono(stream<stereo_t>* in) { base_type::init(in); }
inline int process(int count, const stereo_t* in, float* out) {
static inline int process(int count, const stereo_t* in, float* out) {
for (int i = 0; i < count; i++) {
out[i] = (in[i].l + in[i].r) / 2.0f;
}

22
core/src/dsp/noise_reduction/noise_blanker.h
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@ -37,21 +37,17 @@ namespace dsp::noise_reduction {
inline int process(int count, complex_t* in, complex_t* out) {
for (int i = 0; i < count; i++) {
// Get signal amplitude
// Get signal amplitude and pass value if null
float inAmp = in[i].amplitude();
// Update average amplitude
float gain = 1.0f;
if (inAmp != 0.0f) {
amp = (amp * _invRate) + (inAmp * _rate);
float excess = inAmp / amp;
if (excess > _level) {
gain = 1.0f / excess;
}
if (!inAmp) {
out[i] = in[i];
}
// Scale output by gain
out[i] = in[i] * gain;
// Update running average of amplitude
amp = (_rate*inAmp) + (_invRate*amp);
// Null out if spike (Note: ideally, it should try to guess the real data)
out[i] = (inAmp > _level*amp) ? complex_t{0.0f,0.0f} : in[i];
}
return count;
}

1
decoder_modules/radio/src/demod.h
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@ -45,6 +45,7 @@ namespace demod {
virtual int getDefaultDeemphasisMode() = 0;
virtual bool getFMIFNRAllowed() = 0;
virtual bool getNBAllowed() = 0;
virtual bool getAFNRAllowed() = 0;
virtual dsp::stream<dsp::stereo_t>* getOutput() = 0;
};
}

1
decoder_modules/radio/src/demodulators/am.h
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@ -86,6 +86,7 @@ namespace demod {
int getDefaultDeemphasisMode() { return DEEMP_MODE_NONE; }
bool getFMIFNRAllowed() { return false; }
bool getNBAllowed() { return false; }
bool getAFNRAllowed() { return false; }
dsp::stream<dsp::stereo_t>* getOutput() { return &demod.out; }
private:

1
decoder_modules/radio/src/demodulators/cw.h
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@ -92,6 +92,7 @@ namespace demod {
int getDefaultDeemphasisMode() { return DEEMP_MODE_NONE; }
bool getFMIFNRAllowed() { return false; }
bool getNBAllowed() { return false; }
bool getAFNRAllowed() { return false; }
dsp::stream<dsp::stereo_t>* getOutput() { return &demod.out; }
private:

1
decoder_modules/radio/src/demodulators/dsb.h
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@ -79,6 +79,7 @@ namespace demod {
int getDefaultDeemphasisMode() { return DEEMP_MODE_NONE; }
bool getFMIFNRAllowed() { return false; }
bool getNBAllowed() { return true; }
bool getAFNRAllowed() { return false; }
dsp::stream<dsp::stereo_t>* getOutput() { return &demod.out; }
private:

1
decoder_modules/radio/src/demodulators/lsb.h
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@ -79,6 +79,7 @@ namespace demod {
int getDefaultDeemphasisMode() { return DEEMP_MODE_NONE; }
bool getFMIFNRAllowed() { return false; }
bool getNBAllowed() { return true; }
bool getAFNRAllowed() { return false; }
dsp::stream<dsp::stereo_t>* getOutput() { return &demod.out; }
private:

1
decoder_modules/radio/src/demodulators/nfm.h
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@ -75,6 +75,7 @@ namespace demod {
int getDefaultDeemphasisMode() { return DEEMP_MODE_NONE; }
bool getFMIFNRAllowed() { return true; }
bool getNBAllowed() { return false; }
bool getAFNRAllowed() { return false; }
dsp::stream<dsp::stereo_t>* getOutput() { return &demod.out; }
private:

1
decoder_modules/radio/src/demodulators/raw.h
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@ -59,6 +59,7 @@ namespace demod {
int getDefaultDeemphasisMode() { return DEEMP_MODE_NONE; }
bool getFMIFNRAllowed() { return false; }
bool getNBAllowed() { return true; }
bool getAFNRAllowed() { return false; }
dsp::stream<dsp::stereo_t>* getOutput() { return &c2s.out; }
private:

1
decoder_modules/radio/src/demodulators/usb.h
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@ -80,6 +80,7 @@ namespace demod {
int getDefaultDeemphasisMode() { return DEEMP_MODE_NONE; }
bool getFMIFNRAllowed() { return false; }
bool getNBAllowed() { return true; }
bool getAFNRAllowed() { return true; }
dsp::stream<dsp::stereo_t>* getOutput() { return &demod.out; }
private:

1
decoder_modules/radio/src/demodulators/wfm.h
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@ -130,6 +130,7 @@ namespace demod {
int getDefaultDeemphasisMode() { return DEEMP_MODE_50US; }
bool getFMIFNRAllowed() { return true; }
bool getNBAllowed() { return false; }
bool getAFNRAllowed() { return false; }
dsp::stream<dsp::stereo_t>* getOutput() { return &demod.out; }
// ============= DEDICATED FUNCTIONS =============

34
decoder_modules/radio/src/radio_module.h
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@ -9,6 +9,7 @@
#include <dsp/noise_reduction/noise_blanker.h>
#include <dsp/noise_reduction/fm_if.h>
#include <dsp/noise_reduction/squelch.h>
#include <dsp/noise_reduction/audio.h>
#include <dsp/multirate/rational_resampler.h>
#include <dsp/filter/deephasis.h>
#include <core.h>
@ -83,9 +84,11 @@ public:
resamp.init(NULL, 250000.0, 48000.0);
deemp.init(NULL, 50e-6, 48000.0);
afNR.init(NULL, 1024);
afChain.addBlock(&resamp, true);
afChain.addBlock(&deemp, false);
afChain.addBlock(&afNR, false);
// Initialize the sink
srChangeHandler.ctx = this;
@ -247,6 +250,12 @@ private:
if (!_this->nbEnabled && _this->enabled) { style::endDisabled(); }
}
// Noise reduction
if (_this->afNRAllowed) {
if (ImGui::Checkbox(("Audio Noise Reduction##_radio_afnr_ena_" + _this->name).c_str(), &_this->afNREnabled)) {
_this->setAFNREnabled(_this->afNREnabled);
}
}
// Squelch
if (ImGui::Checkbox(("Squelch##_radio_sqelch_ena_" + _this->name).c_str(), &_this->squelchEnabled)) {
@ -370,6 +379,8 @@ private:
fmIFPresetId = ifnrPresets.valueId(IFNR_PRESET_VOICE);
nbAllowed = selectedDemod->getNBAllowed();
nbEnabled = false;
afNRAllowed = selectedDemod->getAFNRAllowed();
afNREnabled = false;
nbLevel = 0.0f;
double ifSamplerate = selectedDemod->getIFSampleRate();
config.acquire();
@ -411,6 +422,9 @@ private:
if (config.conf[name][selectedDemod->getName()].contains("noiseBlankerLevel")) {
nbLevel = config.conf[name][selectedDemod->getName()]["noiseBlankerLevel"];
}
if (config.conf[name][selectedDemod->getName()].contains("audioNoiseReductionEnabled")) {
nbEnabled = config.conf[name][selectedDemod->getName()]["audioNoiseReductionEnabled"];
}
config.release();
// Configure VFO
@ -446,7 +460,10 @@ private:
afChain.enableBlock(&resamp, [=](dsp::stream<dsp::stereo_t>* out){ stream.setInput(out); });
// Configure deemphasis
setDeemphasisMode(deempModes[deempId]);
setDeemphasisMode(deempAllowed ? deempModes[deempId] : DEEMP_MODE_NONE);
// Configure AF NR
setAFNREnabled(afNRAllowed && afNREnabled);
}
else {
// Disable everything if post processing is disabled
@ -508,6 +525,17 @@ private:
config.release(true);
}
void setAFNREnabled(bool enable) {
afNREnabled = enable;
if (!postProcEnabled || !selectedDemod) { return; }
afChain.setBlockEnabled(&afNR, afNREnabled, [=](dsp::stream<dsp::stereo_t>* out){ stream.setInput(out); });
// Save config
config.acquire();
config.conf[name][selectedDemod->getName()]["audioNoiseReductionEnabled"] = nbEnabled;
config.release(true);
}
void setNBEnabled(bool enable) {
nbEnabled = enable;
if (!selectedDemod) { return; }
@ -660,6 +688,7 @@ private:
dsp::chain<dsp::stereo_t> afChain;
dsp::multirate::RationalResampler<dsp::stereo_t> resamp;
dsp::filter::Deemphasis<dsp::stereo_t> deemp;
dsp::noise_reduction::Audio afNR;
SinkManager::Stream stream;
@ -683,6 +712,9 @@ private:
int deempId = 0;
bool deempAllowed;
bool afNREnabled = false;
bool afNRAllowed;
bool FMIFNRAllowed;
bool FMIFNREnabled = false;
int fmIFPresetId;