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https://github.com/f4exb/sdrangel.git
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ATV Modulator: added possibility to adjust baseband modulated signal amplitude to prevent filter saturation
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f4exb
parent
5ae92bf1b6
commit
7e70b7f6c6
@ -112,7 +112,8 @@ void ATVMod::configure(MessageQueue* messageQueue,
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bool videoPlay,
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bool cameraPlay,
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bool channelMute,
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bool invertedVideo)
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bool invertedVideo,
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float rfScaling)
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{
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Message* cmd = MsgConfigureATVMod::create(
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rfBandwidth,
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@ -127,7 +128,8 @@ void ATVMod::configure(MessageQueue* messageQueue,
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videoPlay,
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cameraPlay,
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channelMute,
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invertedVideo);
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invertedVideo,
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rfScaling);
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messageQueue->push(cmd);
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}
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@ -206,22 +208,22 @@ void ATVMod::modulateSample()
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m_modPhasor += (t - 0.5f) * M_PI;
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if (m_modPhasor > 2.0f * M_PI) m_modPhasor -= 2.0f * M_PI; // limit growth
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if (m_modPhasor < 2.0f * M_PI) m_modPhasor += 2.0f * M_PI; // limit growth
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m_modSample.real(cos(m_modPhasor) * 29204.0f); // -1 dB
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m_modSample.imag(sin(m_modPhasor) * 29204.0f);
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m_modSample.real(cos(m_modPhasor) * m_running.m_rfScalingFactor); // -1 dB
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m_modSample.imag(sin(m_modPhasor) * m_running.m_rfScalingFactor);
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break;
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case ATVModulationLSB:
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case ATVModulationUSB:
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m_modSample = modulateSSB(t);
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m_modSample *= 29204.0f;
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m_modSample *= m_running.m_rfScalingFactor;
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break;
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case ATVModulationVestigialLSB:
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case ATVModulationVestigialUSB:
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m_modSample = modulateVestigialSSB(t);
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m_modSample *= 29204.0f;
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m_modSample *= m_running.m_rfScalingFactor;
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break;
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case ATVModulationAM: // AM 90%
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default:
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m_modSample.real((t*1.8f + 0.1f) * 16384.0f); // modulate and scale zero frequency carrier
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m_modSample.real((t*1.8f + 0.1f) * (m_running.m_rfScalingFactor/2.0f)); // modulate and scale zero frequency carrier
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m_modSample.imag(0.0f);
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}
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}
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@ -535,6 +537,7 @@ bool ATVMod::handleMessage(const Message& cmd)
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m_config.m_cameraPlay = cfg.getCameraPlay();
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m_config.m_channelMute = cfg.getChannelMute();
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m_config.m_invertedVideo = cfg.getInvertedVideo();
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m_config.m_rfScalingFactor = cfg.getRFScaling();
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apply();
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@ -551,7 +554,8 @@ bool ATVMod::handleMessage(const Message& cmd)
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<< " m_videoPlay: " << m_config.m_videoPlay
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<< " m_cameraPlay: " << m_config.m_cameraPlay
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<< " m_channelMute: " << m_config.m_channelMute
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<< " m_invertedVideo: " << m_config.m_invertedVideo;
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<< " m_invertedVideo: " << m_config.m_invertedVideo
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<< " m_rfScalingFactor: " << m_config.m_rfScalingFactor;
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return true;
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}
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@ -725,6 +729,7 @@ void ATVMod::apply(bool force)
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m_running.m_cameraPlay = m_config.m_cameraPlay;
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m_running.m_channelMute = m_config.m_channelMute;
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m_running.m_invertedVideo = m_config.m_invertedVideo;
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m_running.m_rfScalingFactor = m_config.m_rfScalingFactor;
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}
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void ATVMod::getBaseValues(int linesPerSecond, int& sampleRateUnits, int& nbPointsPerRateUnit)
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@ -342,7 +342,8 @@ public:
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bool videoPlay,
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bool cameraPLay,
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bool channelMute,
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bool invertedVideo);
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bool invertedVideo,
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float rfScaling);
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virtual void pull(Sample& sample);
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virtual void pullAudio(int nbSamples); // this is used for video signal actually
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@ -385,6 +386,7 @@ private:
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bool getCameraPlay() const { return m_cameraPlay; }
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bool getChannelMute() const { return m_channelMute; }
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bool getInvertedVideo() const { return m_invertedVideo; }
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float getRFScaling() const { return m_rfScaling; }
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static MsgConfigureATVMod* create(
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Real rfBandwidth,
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@ -399,7 +401,8 @@ private:
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bool videoPlay,
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bool cameraPlay,
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bool channelMute,
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bool invertedVideo)
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bool invertedVideo,
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float rfScaling)
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{
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return new MsgConfigureATVMod(
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rfBandwidth,
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@ -414,7 +417,8 @@ private:
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videoPlay,
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cameraPlay,
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channelMute,
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invertedVideo);
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invertedVideo,
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rfScaling);
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}
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private:
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@ -431,6 +435,7 @@ private:
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bool m_cameraPlay;
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bool m_channelMute;
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bool m_invertedVideo;
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float m_rfScaling;
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MsgConfigureATVMod(
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Real rfBandwidth,
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@ -445,7 +450,8 @@ private:
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bool videoPlay,
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bool cameraPlay,
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bool channelMute,
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bool invertedVideo) :
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bool invertedVideo,
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float rfScaling) :
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Message(),
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m_rfBandwidth(rfBandwidth),
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m_rfOppBandwidth(rfOppBandwidth),
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@ -459,7 +465,8 @@ private:
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m_videoPlay(videoPlay),
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m_cameraPlay(cameraPlay),
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m_channelMute(channelMute),
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m_invertedVideo(invertedVideo)
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m_invertedVideo(invertedVideo),
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m_rfScaling(rfScaling)
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{ }
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};
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@ -508,6 +515,7 @@ private:
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bool m_cameraPlay; //!< True to play camera video and false to pause
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bool m_channelMute; //!< Mute channel baseband output
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bool m_invertedVideo; //!< True if video signal is inverted before modulation
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float m_rfScalingFactor; //!< Scaling factor from +/-1 to +/-2^15
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Config() :
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m_outputSampleRate(-1),
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@ -524,7 +532,8 @@ private:
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m_videoPlay(false),
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m_cameraPlay(false),
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m_channelMute(false),
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m_invertedVideo(false)
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m_invertedVideo(false),
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m_rfScalingFactor(29204.0f) // -1dB
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{ }
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};
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@ -100,6 +100,7 @@ QByteArray ATVModGUI::serialize() const
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s.writeBool(9, ui->invertVideo->isChecked());
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s.writeS32(10, ui->nbLines->currentIndex());
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s.writeS32(11, ui->fps->currentIndex());
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s.writeS32(12, ui->rfScaling->value());
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return s.final();
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}
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@ -150,6 +151,8 @@ bool ATVModGUI::deserialize(const QByteArray& data)
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ui->nbLines->setCurrentIndex(tmp);
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d.readS32(11, &tmp, 0);
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ui->fps->setCurrentIndex(tmp);
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d.readS32(12, &tmp, 80);
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ui->rfScaling->setValue(tmp);
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blockApplySettings(false);
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m_channelMarker.blockSignals(false);
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@ -333,6 +336,12 @@ void ATVModGUI::on_modulation_currentIndexChanged(int index)
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applySettings();
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}
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void ATVModGUI::on_rfScaling_valueChanged(int value)
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{
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ui->rfScalingText->setText(tr("%1").arg(value));
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applySettings();
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}
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void ATVModGUI::on_rfBW_valueChanged(int value)
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{
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ui->rfBWText->setText(QString("%1k").arg((value*m_rfSliderDivisor) / 1000.0, 0, 'f', 0));
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@ -613,7 +622,8 @@ void ATVModGUI::applySettings()
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ui->playVideo->isChecked(),
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ui->playCamera->isChecked(),
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ui->channelMute->isChecked(),
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ui->invertVideo->isChecked());
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ui->invertVideo->isChecked(),
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ui->rfScaling->value() * 327.68f);
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}
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}
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@ -64,6 +64,7 @@ private slots:
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void on_deltaMinus_toggled(bool minus);
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void on_channelMute_toggled(bool checked);
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void on_modulation_currentIndexChanged(int index);
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void on_rfScaling_valueChanged(int value);
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void on_rfBW_valueChanged(int value);
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void on_rfOppBW_valueChanged(int value);
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void on_nbLines_currentIndexChanged(int index);
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@ -347,6 +347,55 @@
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</item>
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<item>
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<layout class="QHBoxLayout" name="volumeLayout">
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<item>
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<widget class="QLabel" name="rfScalingLabel">
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<property name="text">
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<string>RF</string>
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</property>
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</widget>
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</item>
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<item>
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<widget class="QDial" name="rfScaling">
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<property name="maximumSize">
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<size>
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<width>24</width>
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<height>24</height>
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</size>
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</property>
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<property name="maximum">
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<number>100</number>
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</property>
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<property name="pageStep">
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<number>1</number>
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</property>
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<property name="value">
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<number>80</number>
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</property>
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</widget>
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</item>
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<item>
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<widget class="QLabel" name="rfScalingText">
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<property name="minimumSize">
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<size>
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<width>20</width>
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<height>0</height>
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</size>
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</property>
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<property name="text">
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<string>80</string>
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</property>
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<property name="alignment">
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<set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
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</property>
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</widget>
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</item>
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<item>
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<widget class="Line" name="line_9">
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<property name="orientation">
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<enum>Qt::Vertical</enum>
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</property>
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</widget>
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</item>
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<item>
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<widget class="QLabel" name="volLabel">
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<property name="text">
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