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Fix mis-aligned average buffers on view shift

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This commit is contained in:
Charles J. Cliffe 2015-12-12 19:26:02 -05:00
parent aa4478946f
commit d448f6dfc4
1 changed files with 19 additions and 1 deletions
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20
src/process/SpectrumVisualProcessor.cpp
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@ -179,9 +179,27 @@ void SpectrumVisualProcessor::process() {
if (centerFreq != iqData->frequency) {
if ((centerFreq - iqData->frequency) != shiftFrequency || lastInputBandwidth != iqData->sampleRate) {
if (abs(iqData->frequency - centerFreq) < (wxGetApp().getSampleRate() / 2)) {
long lastShiftFrequency = shiftFrequency;
shiftFrequency = centerFreq - iqData->frequency;
nco_crcf_reset(freqShifter);
nco_crcf_set_frequency(freqShifter, (2.0 * M_PI) * (((double) abs(shiftFrequency)) / ((double) iqData->sampleRate)));
if (is_view.load()) {
long freqDiff = shiftFrequency - lastShiftFrequency;
double binPerHz = double(bandwidth) / double(fftSizeInternal);
int numShift = round(double(abs(freqDiff)) / binPerHz);
if (numShift < fftSizeInternal/2) {
if (freqDiff > 0) {
memmove(&fft_result_ma[0], &fft_result_ma[numShift], (fftSizeInternal-numShift) * sizeof(double));
memmove(&fft_result_maa[0], &fft_result_maa[numShift], (fftSizeInternal-numShift) * sizeof(double));
} else {
memmove(&fft_result_ma[numShift], &fft_result_ma[0], (fftSizeInternal-numShift) * sizeof(double));
memmove(&fft_result_maa[numShift], &fft_result_maa[0], (fftSizeInternal-numShift) * sizeof(double));
}
}
}
}
}