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Ryzerth
2020-07-19 15:59:44 +02:00
parent 370324bc68
commit cbf0b6290d
28 changed files with 9162 additions and 393 deletions
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99
src/dsp/vfo.h
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@ -15,112 +15,54 @@ namespace dsp {
_input = in;
_outputSampleRate = outputSampleRate;
_inputSampleRate = inputSampleRate;
int _gcd = std::gcd((int)inputSampleRate, (int)outputSampleRate);
_interp = outputSampleRate / _gcd;
_decim = inputSampleRate / _gcd;
_bandWidth = bandWidth;
_blockSize = blockSize;
output = &decim.output;
dsp::BlackmanWindow(_taps, inputSampleRate * _interp, bandWidth / 2.0f, bandWidth / 2.0f);
output = &resamp.output;
lo.init(offset, inputSampleRate, blockSize);
mixer.init(in, &lo.output, blockSize);
interp.init(&mixer.output, _interp, blockSize);
if (_interp == 1) {
decim.init(&mixer.output, _taps, blockSize, _decim);
}
else {
decim.init(&interp.output, _taps, blockSize * _interp, _decim);
}
resamp.init(&mixer.output, inputSampleRate, outputSampleRate, blockSize, _bandWidth * 0.8f, _bandWidth);
}
void start() {
lo.start();
mixer.start();
if (_interp != 1) {
interp.start();
}
decim.start();
resamp.start();
}
void stop() {
void stop(bool resampler = true) {
lo.stop();
mixer.stop();
interp.stop();
decim.stop();
if (resampler) { resamp.stop(); };
}
void setInputSampleRate(float inputSampleRate, int blockSize = -1) {
interp.stop();
decim.stop();
lo.stop();
lo.setSampleRate(inputSampleRate);
_inputSampleRate = inputSampleRate;
int _gcd = std::gcd((int)inputSampleRate, (int)_outputSampleRate);
_interp = _outputSampleRate / _gcd;
_decim = inputSampleRate / _gcd;
dsp::BlackmanWindow(_taps, inputSampleRate * _interp, _bandWidth / 2.0f, _bandWidth / 2.0f);
interp.setInterpolation(_interp);
decim.setDecimation(_decim);
if (blockSize > 0) {
lo.stop();
mixer.stop();
_blockSize = blockSize;
mixer.stop();
lo.setBlockSize(_blockSize);
mixer.setBlockSize(_blockSize);
interp.setBlockSize(_blockSize);
lo.start();
mixer.start();
}
decim.setBlockSize(_blockSize * _interp);
if (_interp == 1) {
decim.setInput(&mixer.output);
}
else {
decim.setInput(&interp.output);
interp.start();
}
decim.start();
resamp.setInputSampleRate(inputSampleRate, _blockSize, _bandWidth * 0.8f, _bandWidth);
lo.start();
}
void setOutputSampleRate(float outputSampleRate, float bandWidth = -1) {
interp.stop();
decim.stop();
if (bandWidth > 0) {
_bandWidth = bandWidth;
}
_outputSampleRate = outputSampleRate;
int _gcd = std::gcd((int)_inputSampleRate, (int)outputSampleRate);
_interp = outputSampleRate / _gcd;
_decim = _inputSampleRate / _gcd;
dsp::BlackmanWindow(_taps, _inputSampleRate * _interp, _bandWidth / 2.0f, _bandWidth / 2.0f);
decim.setTaps(_taps);
interp.setInterpolation(_interp);
decim.setDecimation(_decim);
decim.setBlockSize(_blockSize * _interp);
if (_interp == 1) {
decim.setInput(&mixer.output);
}
else {
decim.setInput(&interp.output);
interp.start();
}
decim.start();
resamp.setOutputSampleRate(outputSampleRate, _bandWidth * 0.8f, _bandWidth);
}
void setBandwidth(float bandWidth) {
decim.stop();
dsp::BlackmanWindow(_taps, _inputSampleRate * _interp, _bandWidth / 2.0f, _bandWidth / 2.0f);
decim.setTaps(_taps);
decim.start();
_bandWidth = bandWidth;
resamp.setFilterParams(_bandWidth * 0.8f, _bandWidth);
}
void setOffset(float offset) {
@ -128,27 +70,26 @@ namespace dsp {
}
void setBlockSize(int blockSize) {
stop();
stop(false);
_blockSize = blockSize;
lo.setBlockSize(_blockSize);
mixer.setBlockSize(_blockSize);
interp.setBlockSize(_blockSize);
decim.setBlockSize(_blockSize * _interp);
resamp.setBlockSize(_blockSize);
start();
}
int getOutputBlockSize() {
return resamp.getOutputBlockSize();
}
stream<complex_t>* output;
private:
SineSource lo;
Multiplier mixer;
Interpolator<complex_t> interp;
DecimatingFIRFilter decim;
FIRResampler resamp;
stream<complex_t>* _input;
std::vector<float> _taps;
int _interp;
int _decim;
float _outputSampleRate;
float _inputSampleRate;
float _bandWidth;