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https://github.com/f4exb/sdrangel.git
synced 2024-12-23 10:05:46 -05:00
Revert "SSB demod: implemented DSB option"
This reverts commit 5e0e3a01e1
.
This commit is contained in:
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111f00b230
commit
4de446053d
@ -50,20 +50,20 @@ SSBDemod::SSBDemod(SampleSink* sampleSink) :
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m_audioBuffer.resize(1<<9);
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m_audioBufferFill = 0;
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m_undersampleCount = 0;
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m_sum = 0;
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m_usb = true;
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m_magsq = 0.0f;
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SSBFilter = new fftfilt(m_LowCutoff / m_audioSampleRate, m_Bandwidth / m_audioSampleRate, ssbFftLen);
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DSBFilter = new fftfilt((2*m_Bandwidth) / m_sampleRate, 2*ssbFftLen);
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DSPEngine::instance()->addAudioSink(&m_audioFifo);
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}
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SSBDemod::~SSBDemod()
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{
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if (SSBFilter) delete SSBFilter;
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if (DSBFilter) delete DSBFilter;
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if (SSBFilter)
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{
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delete SSBFilter;
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}
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DSPEngine::instance()->removeAudioSink(&m_audioFifo);
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}
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@ -84,7 +84,7 @@ void SSBDemod::configure(MessageQueue* messageQueue,
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void SSBDemod::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool positiveOnly)
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{
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Complex ci;
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fftfilt::cmplx *sideband;
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fftfilt::cmplx *sideband, sum;
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Real avg;
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int n_out;
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@ -101,81 +101,68 @@ void SSBDemod::feed(const SampleVector::const_iterator& begin, const SampleVecto
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if(m_interpolator.interpolate(&m_sampleDistanceRemain, c, &ci))
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{
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if (m_dsb)
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{
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n_out = DSBFilter->runDSB(ci, &sideband);
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}
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else
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{
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n_out = SSBFilter->runSSB(ci, &sideband, m_usb);
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}
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for (int i = 0; i < n_out; i++)
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{
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// Downsample by 2^(m_scaleLog2 - 1) for SSB band spectrum display
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// smart decimation with bit gain using float arithmetic (23 bits significand)
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m_sum += sideband[i];
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if (!(m_undersampleCount++ & decim_mask))
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{
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m_sum /= decim;
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m_magsq = (m_sum.real() * m_sum.real() + m_sum.imag() * m_sum.imag())/ (1<<30);
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if (!m_dsb & !m_usb)
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{ // invert spectrum for LSB
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m_sampleBuffer.push_back(Sample(m_sum.imag(), m_sum.real()));
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}
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else
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{
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m_sampleBuffer.push_back(Sample(m_sum.real(), m_sum.imag()));
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}
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m_sum = 0;
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}
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if (m_audioBinaual)
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{
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if (m_audioFlipChannels)
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{
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m_audioBuffer[m_audioBufferFill].r = (qint16)(sideband[i].imag() * m_volume * 100);
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m_audioBuffer[m_audioBufferFill].l = (qint16)(sideband[i].real() * m_volume * 100);
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}
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else
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{
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m_audioBuffer[m_audioBufferFill].r = (qint16)(sideband[i].real() * m_volume * 100);
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m_audioBuffer[m_audioBufferFill].l = (qint16)(sideband[i].imag() * m_volume * 100);
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}
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}
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else
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{
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Real demod = (sideband[i].real() + sideband[i].imag()) * 0.7;
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qint16 sample = (qint16)(demod * m_volume * 100);
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m_audioBuffer[m_audioBufferFill].l = sample;
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m_audioBuffer[m_audioBufferFill].r = sample;
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}
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++m_audioBufferFill;
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if (m_audioBufferFill >= m_audioBuffer.size())
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{
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uint res = m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 1);
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if (res != m_audioBufferFill)
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{
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qDebug("lost %u samples", m_audioBufferFill - res);
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}
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m_audioBufferFill = 0;
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}
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}
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n_out = SSBFilter->runSSB(ci, &sideband, m_usb);
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m_sampleDistanceRemain += (Real)m_sampleRate / m_audioSampleRate;
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}
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else
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{
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n_out = 0;
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}
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for (int i = 0; i < n_out; i++)
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{
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// Downsample by 2^(m_scaleLog2 - 1) for SSB band spectrum display
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// smart decimation with bit gain using float arithmetic (23 bits significand)
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sum += sideband[i];
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if (!(m_undersampleCount++ & decim_mask))
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{
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Real avgr = sum.real() / decim;
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Real avgi = sum.imag() / decim;
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m_magsq = (avgr * avgr + avgi * avgi) / (1<<30);
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//avg = (sum.real() + sum.imag()) * 0.7 * 32768.0 / decim;
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avg = (avgr + avgi) * 0.7;
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m_sampleBuffer.push_back(Sample(avg, 0.0));
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sum.real() = 0.0;
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sum.imag() = 0.0;
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}
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if (m_audioBinaual)
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{
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if (m_audioFlipChannels)
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{
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m_audioBuffer[m_audioBufferFill].r = (qint16)(sideband[i].imag() * m_volume * 100);
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m_audioBuffer[m_audioBufferFill].l = (qint16)(sideband[i].real() * m_volume * 100);
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}
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else
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{
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m_audioBuffer[m_audioBufferFill].r = (qint16)(sideband[i].real() * m_volume * 100);
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m_audioBuffer[m_audioBufferFill].l = (qint16)(sideband[i].imag() * m_volume * 100);
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}
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}
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else
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{
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Real demod = (sideband[i].real() + sideband[i].imag()) * 0.7;
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qint16 sample = (qint16)(demod * m_volume * 100);
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m_audioBuffer[m_audioBufferFill].l = sample;
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m_audioBuffer[m_audioBufferFill].r = sample;
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}
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++m_audioBufferFill;
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if (m_audioBufferFill >= m_audioBuffer.size())
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{
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uint res = m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 1);
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if (res != m_audioBufferFill)
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{
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qDebug("lost %u samples", m_audioBufferFill - res);
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}
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m_audioBufferFill = 0;
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}
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}
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}
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if (m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 0) != m_audioBufferFill)
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@ -186,7 +173,7 @@ void SSBDemod::feed(const SampleVector::const_iterator& begin, const SampleVecto
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if(m_sampleSink != 0)
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{
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m_sampleSink->feed(m_sampleBuffer.begin(), m_sampleBuffer.end(), !m_dsb);
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m_sampleSink->feed(m_sampleBuffer.begin(), m_sampleBuffer.end(), true);
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}
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m_sampleBuffer.clear();
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@ -252,7 +239,6 @@ bool SSBDemod::handleMessage(const Message& cmd)
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m_interpolator.create(16, m_sampleRate, band * 2.0f);
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SSBFilter->create_filter(m_LowCutoff / (float) m_audioSampleRate, m_Bandwidth / (float) m_audioSampleRate);
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DSBFilter->create_dsb_filter((2*m_Bandwidth) / m_sampleRate);
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m_volume = cfg.getVolume();
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m_volume *= m_volume * 0.1;
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@ -43,7 +43,6 @@ public:
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bool audioFlipChannels,
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bool dsb);
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int getSampleRate() const { return m_sampleRate; }
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virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool positiveOnly);
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virtual void start();
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virtual void stop();
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@ -113,7 +112,6 @@ private:
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Real m_LowCutoff;
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Real m_volume;
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int m_spanLog2;
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fftfilt::cmplx m_sum;
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int m_undersampleCount;
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int m_sampleRate;
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int m_frequency;
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@ -127,7 +125,6 @@ private:
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Interpolator m_interpolator;
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Real m_sampleDistanceRemain;
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fftfilt* SSBFilter;
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fftfilt* DSBFilter;
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SampleSink* m_sampleSink;
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SampleVector m_sampleBuffer;
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@ -167,31 +167,7 @@ void SSBDemodGUI::on_audioFlipChannels_toggled(bool flip)
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void SSBDemodGUI::on_dsb_toggled(bool dsb)
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{
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m_dsb = dsb;
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if (!m_dsb)
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{
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if (ui->BW->value() < 0) {
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m_channelMarker.setSidebands(ChannelMarker::lsb);
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} else {
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m_channelMarker.setSidebands(ChannelMarker::usb);
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}
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ui->glSpectrum->setCenterFrequency(m_rate/4);
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ui->glSpectrum->setSampleRate(m_rate/2);
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ui->glSpectrum->setSsbSpectrum(true);
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on_lowCut_valueChanged(m_channelMarker.getLowCutoff()/100);
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}
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else
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{
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m_channelMarker.setSidebands(ChannelMarker::dsb);
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ui->glSpectrum->setCenterFrequency(0);
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ui->glSpectrum->setSampleRate(m_rate);
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ui->glSpectrum->setSsbSpectrum(false);
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applySettings();
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}
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applySettings();
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}
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void SSBDemodGUI::on_deltaFrequency_changed(quint64 value)
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@ -212,17 +188,13 @@ void SSBDemodGUI::on_BW_valueChanged(int value)
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ui->BWText->setText(tr("%1k").arg(s));
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m_channelMarker.setBandwidth(value * 100 * 2);
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if (!m_dsb)
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if (value < 0)
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{
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if (value < 0) {
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m_channelMarker.setSidebands(ChannelMarker::lsb);
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} else {
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m_channelMarker.setSidebands(ChannelMarker::usb);
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}
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m_channelMarker.setSidebands(ChannelMarker::lsb);
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}
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else
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{
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m_channelMarker.setSidebands(ChannelMarker::dsb);
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m_channelMarker.setSidebands(ChannelMarker::usb);
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}
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on_lowCut_valueChanged(m_channelMarker.getLowCutoff()/100);
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@ -234,18 +206,25 @@ int SSBDemodGUI::getEffectiveLowCutoff(int lowCutoff)
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int effectiveLowCutoff = lowCutoff;
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const int guard = 100;
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if (ssbBW < 0) {
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if (effectiveLowCutoff < ssbBW + guard) {
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if (ssbBW < 0)
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{
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if (effectiveLowCutoff < ssbBW + guard)
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{
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effectiveLowCutoff = ssbBW + guard;
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}
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if (effectiveLowCutoff > 0) {
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if (effectiveLowCutoff > 0)
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{
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effectiveLowCutoff = 0;
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}
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} else {
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if (effectiveLowCutoff > ssbBW - guard) {
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}
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else
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{
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if (effectiveLowCutoff > ssbBW - guard)
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{
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effectiveLowCutoff = ssbBW - guard;
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}
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if (effectiveLowCutoff < 0) {
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if (effectiveLowCutoff < 0)
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{
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effectiveLowCutoff = 0;
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}
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}
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@ -344,7 +323,6 @@ SSBDemodGUI::SSBDemodGUI(PluginAPI* pluginAPI, QWidget* parent) :
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ui->spectrumGUI->setBuddies(m_spectrumVis->getInputMessageQueue(), m_spectrumVis, ui->glSpectrum);
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applySettings();
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setNewRate(m_spanLog2);
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}
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SSBDemodGUI::~SSBDemodGUI()
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@ -361,27 +339,33 @@ SSBDemodGUI::~SSBDemodGUI()
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bool SSBDemodGUI::setNewRate(int spanLog2)
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{
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if ((spanLog2 < 0) || (spanLog2 > 6)) {
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if ((spanLog2 < 1) || (spanLog2 > 5))
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{
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return false;
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}
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m_spanLog2 = spanLog2;
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//m_rate = 48000 / (1<<spanLog2);
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m_rate = m_ssbDemod->getSampleRate() / (1<<spanLog2);
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m_rate = 48000 / (1<<spanLog2);
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if (ui->BW->value() < -m_rate/200) {
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ui->BW->setValue(-m_rate/200);
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if (ui->BW->value() < -m_rate/100)
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{
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ui->BW->setValue(-m_rate/100);
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m_channelMarker.setBandwidth(-m_rate*2);
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} else if (ui->BW->value() > m_rate/200) {
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ui->BW->setValue(m_rate/200);
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}
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else if (ui->BW->value() > m_rate/100)
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{
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ui->BW->setValue(m_rate/100);
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m_channelMarker.setBandwidth(m_rate*2);
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}
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if (ui->lowCut->value() < -m_rate/200) {
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ui->lowCut->setValue(-m_rate/200);
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if (ui->lowCut->value() < -m_rate/100)
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{
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ui->lowCut->setValue(-m_rate/100);
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m_channelMarker.setLowCutoff(-m_rate);
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} else if (ui->lowCut->value() > m_rate/200) {
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ui->lowCut->setValue(m_rate/200);
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}
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else if (ui->lowCut->value() > m_rate/100)
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{
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ui->lowCut->setValue(m_rate/100);
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m_channelMarker.setLowCutoff(m_rate);
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}
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@ -393,26 +377,8 @@ bool SSBDemodGUI::setNewRate(int spanLog2)
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QString s = QString::number(m_rate/1000.0, 'f', 1);
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ui->spanText->setText(tr("%1k").arg(s));
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if (!m_dsb)
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{
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if (ui->BW->value() < 0) {
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m_channelMarker.setSidebands(ChannelMarker::lsb);
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} else {
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m_channelMarker.setSidebands(ChannelMarker::usb);
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}
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ui->glSpectrum->setCenterFrequency(m_rate/4);
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ui->glSpectrum->setSampleRate(m_rate/2);
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ui->glSpectrum->setSsbSpectrum(true);
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}
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else
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{
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m_channelMarker.setSidebands(ChannelMarker::dsb);
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ui->glSpectrum->setCenterFrequency(0);
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ui->glSpectrum->setSampleRate(m_rate);
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ui->glSpectrum->setSsbSpectrum(false);
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}
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ui->glSpectrum->setCenterFrequency(m_rate/2);
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ui->glSpectrum->setSampleRate(m_rate);
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return true;
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}
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@ -201,9 +201,6 @@
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<property name="checkable">
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<bool>true</bool>
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</property>
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<property name="autoRaise">
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<bool>false</bool>
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</property>
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</widget>
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</item>
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</layout>
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