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Write captured samples to file in the FFT viewer #220

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Write captured samples to file in the FFT viewer #220

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27 changes: 22 additions & 5 deletions GUI/fftviewer_wxgui/fftviewer_frFFTviewer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -481,18 +481,35 @@ void fftviewer_frFFTviewer::StreamingLoop(

if (pthis->captureSamples.load())
{
const uint32_t samplesToCopy = min(samplesPopped, samplesToCapture);
for (int ch = 0; ch < channelsCount; ++ch)
{
uint32_t samplesToCopy = min(samplesPopped, samplesToCapture);
if (samplesToCopy <= 0)
break;
for (uint32_t i = 0; i < samplesToCopy; ++i)
{
captureBuffer[ch][samplesCaptured + i].real(buffers[ch][i].real() * 32767);
captureBuffer[ch][samplesCaptured + i].imag(buffers[ch][i].imag() * 32767);
}
samplesToCapture -= samplesToCopy;
samplesCaptured += samplesToCopy;
}
samplesToCapture -= samplesToCopy;
samplesCaptured += samplesToCopy;

if (samplesToCapture == 0)
{
// capture complete, write the samples to the selected file
std::ofstream fout(pthis->captureFilename);
fout << "AI\tAQ";
if (channelsCount > 1)
fout << "\tBI\tBQ";
fout << "\n";
for (uint32_t i = 0; i < samplesCaptured; ++i)
{
fout << static_cast<int>(captureBuffer[0][i].real()) << "\t" << static_cast<int>(captureBuffer[0][i].imag());
if (channelsCount > 1)
fout << "\t" << static_cast<int>(captureBuffer[1][i].real()) << "\t"
<< static_cast<int>(captureBuffer[1][i].imag());
fout << "\n";
}
pthis->captureSamples.store(false);
}
}

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