kopia lustrzana https://github.com/f4exb/sdrangel
ATV demod: use common code for horizontal sync and different vertical sync detections for HSkip and standard
f4exb
rodzic
432d6ed8fd
commit
8ae95f2e85
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@ -325,11 +325,7 @@ void ATVDemodSink::demod(Complex& c)
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if (m_registeredTVScreen) // can process only if the screen is available (set via the GUI)
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{
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if (m_settings.m_atvStd == ATVDemodSettings::ATVStdHSkip) {
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processHSkip(sample, sampleVideo);
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} else {
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processClassic(sample, sampleVideo);
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}
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processSample(sample, sampleVideo);
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}
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}
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@ -195,7 +195,7 @@ private:
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void demod(Complex& c);
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void applyStandard(int sampleRate, const ATVDemodSettings& settings, float lineDuration);
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inline void processClassic(float& sample, int& sampleVideo)
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inline void processSample(float& sample, int& sampleVideo)
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{
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// Filling pixel on the current line - reference index 0 at start of sync pulse
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m_registeredTVScreen->setDataColor(m_sampleIndex - m_numberSamplesPerHSync, sampleVideo, sampleVideo, sampleVideo);
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@ -257,143 +257,98 @@ private:
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if (m_sampleIndex >= m_samplesPerLine)
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{
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m_sampleIndex = 0;
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m_lineIndex++;
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if (m_lineIndex == m_numberOfVSyncLines + 3 && m_fieldIndex == 0)
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{
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float shiftSamples = 0.0f;
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// Slow sync: slight adjustment is needed
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if (m_hSyncShiftCount != 0 && m_settings.m_hSync)
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{
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shiftSamples = m_hSyncShiftSum / m_hSyncShiftCount;
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m_sampleIndex = shiftSamples;
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m_hSyncShiftSum = 0.0f;
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m_hSyncShiftCount = 0;
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m_hSyncErrorCount = 0;
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}
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m_registeredTVScreen->renderImage(0,
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shiftSamples < -1.0f ? -1.0f : (shiftSamples > 1.0f ? 1.0f : shiftSamples));
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if (m_settings.m_atvStd == ATVDemodSettings::ATVStdHSkip) {
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processEOLHSkip();
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} else {
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processEOLClassic();
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}
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if (m_vSyncDetectSampleCount > m_vSyncDetectThreshold &&
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(m_lineIndex < 3 || m_lineIndex > m_numberOfVSyncLines + 1) && m_settings.m_vSync)
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{
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if (m_interleaved)
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{
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if (m_fieldDetectSampleCount > m_fieldDetectThreshold1)
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m_fieldIndex = 0;
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else if (m_fieldDetectSampleCount < m_fieldDetectThreshold2)
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m_fieldIndex = 1;
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}
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m_lineIndex = 2;
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}
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m_fieldDetectSampleCount = 0;
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m_vSyncDetectSampleCount = 0;
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if (m_lineIndex > m_settings.m_nbLines / 2 + m_fieldIndex && m_interleaved)
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{
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m_lineIndex = 1;
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m_fieldIndex = 1 - m_fieldIndex;
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}
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else if (m_lineIndex > m_settings.m_nbLines && !m_interleaved)
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{
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m_lineIndex = 1;
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m_fieldIndex = 0;
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}
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int rowIndex = m_lineIndex - m_firstVisibleLine;
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if (m_interleaved)
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rowIndex = rowIndex * 2 - m_fieldIndex;
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m_registeredTVScreen->selectRow(rowIndex);
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}
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prevSample = sample;
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}
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// Vertical sync is obtained by skipping horizontal sync on the line that triggers vertical sync (new frame)
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inline void processHSkip(float& sample, int& sampleVideo)
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// Standard vertical sync
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inline void processEOLClassic()
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{
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// Filling pixel on the current line - reference index 0 at start of sync pulse
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m_registeredTVScreen->setDataColor(m_sampleIndex - m_numberSamplesPerHSync, sampleVideo, sampleVideo, sampleVideo);
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m_lineIndex++;
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if (m_settings.m_hSync)
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if (m_lineIndex == m_numberOfVSyncLines + 3 && m_fieldIndex == 0)
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{
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// Horizontal Synchro detection
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if ((prevSample >= m_settings.m_levelSynchroTop &&
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sample < m_settings.m_levelSynchroTop) // horizontal synchro detected
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&& (m_sampleIndexDetected > m_samplesPerLine - m_numberSamplesPerHTopNom))
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float shiftSamples = 0.0f;
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// Slow sync: slight adjustment is needed
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if (m_hSyncShiftCount != 0 && m_settings.m_hSync)
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{
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double sampleIndexDetectedFrac =
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(sample - m_settings.m_levelSynchroTop) / (prevSample - sample);
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double hSyncShift = -m_sampleIndex - sampleIndexDetectedFrac;
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if (hSyncShift > m_samplesPerLine / 2)
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hSyncShift -= m_samplesPerLine;
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else if (hSyncShift < -m_samplesPerLine / 2)
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hSyncShift += m_samplesPerLine;
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if (fabs(hSyncShift) > m_numberSamplesPerHTopNom)
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{
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m_hSyncErrorCount++;
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if (m_hSyncErrorCount >= 8)
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{
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// Fast sync: shift is too large, needs to be fixed ASAP
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m_sampleIndex = 0;
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m_hSyncShiftSum = 0.0;
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m_hSyncShiftCount = 0;
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m_hSyncErrorCount = 0;
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}
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}
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else
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{
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m_hSyncShiftSum += hSyncShift;
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m_hSyncShiftCount++;
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m_hSyncErrorCount = 0;
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}
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m_sampleIndexDetected = 0;
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shiftSamples = m_hSyncShiftSum / m_hSyncShiftCount;
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m_sampleIndex = shiftSamples;
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m_hSyncShiftSum = 0.0f;
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m_hSyncShiftCount = 0;
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m_hSyncErrorCount = 0;
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}
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else
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m_sampleIndexDetected++;
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}
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else
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{
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m_hSyncShiftSum = 0.0f;
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m_hSyncShiftCount = 0;
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m_registeredTVScreen->renderImage(0,
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shiftSamples < -1.0f ? -1.0f : (shiftSamples > 1.0f ? 1.0f : shiftSamples));
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}
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m_sampleIndex++;
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// end of line
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if (m_sampleIndex >= m_samplesPerLine)
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if (m_vSyncDetectSampleCount > m_vSyncDetectThreshold &&
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(m_lineIndex < 3 || m_lineIndex > m_numberOfVSyncLines + 1) && m_settings.m_vSync)
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{
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m_sampleIndex = 0;
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m_lineIndex++;
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m_rowIndex++;
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if ((m_sampleIndexDetected > (3*m_samplesPerLine) / 2) // Vertical sync is first horizontal sync after skip (count at least 1.5 line length)
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|| (!m_settings.m_vSync && (m_lineIndex >= m_settings.m_nbLines))) // Vsync ignored and reached nominal number of lines per frame
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if (m_interleaved)
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{
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float shiftSamples = 0.0f;
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// Slow sync: slight adjustment is needed
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if (m_hSyncShiftCount != 0 && m_settings.m_hSync)
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{
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shiftSamples = m_hSyncShiftSum / m_hSyncShiftCount;
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m_sampleIndex = shiftSamples;
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m_hSyncShiftSum = 0.0f;
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m_hSyncShiftCount = 0;
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m_hSyncErrorCount = 0;
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}
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m_registeredTVScreen->renderImage(0,
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shiftSamples < -1.0f ? -1.0f : (shiftSamples > 1.0f ? 1.0f : shiftSamples));
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m_lineIndex = 0;
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m_rowIndex = 0;
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if (m_fieldDetectSampleCount > m_fieldDetectThreshold1)
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m_fieldIndex = 0;
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else if (m_fieldDetectSampleCount < m_fieldDetectThreshold2)
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m_fieldIndex = 1;
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}
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m_lineIndex = 2;
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}
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m_fieldDetectSampleCount = 0;
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m_vSyncDetectSampleCount = 0;
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m_registeredTVScreen->selectRow(m_rowIndex);
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if (m_lineIndex > m_settings.m_nbLines / 2 + m_fieldIndex && m_interleaved)
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{
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m_lineIndex = 1;
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m_fieldIndex = 1 - m_fieldIndex;
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}
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else if (m_lineIndex > m_settings.m_nbLines && !m_interleaved)
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{
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m_lineIndex = 1;
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m_fieldIndex = 0;
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}
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prevSample = sample;
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int rowIndex = m_lineIndex - m_firstVisibleLine;
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if (m_interleaved)
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rowIndex = rowIndex * 2 - m_fieldIndex;
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m_registeredTVScreen->selectRow(rowIndex);
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}
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// Vertical sync is obtained by skipping horizontal sync on the line that triggers vertical sync (new frame)
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inline void processEOLHSkip()
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{
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m_lineIndex++;
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m_rowIndex++;
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if ((m_sampleIndexDetected > (3*m_samplesPerLine) / 2) // Vertical sync is first horizontal sync after skip (count at least 1.5 line length)
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|| (!m_settings.m_vSync && (m_lineIndex >= m_settings.m_nbLines))) // Vsync ignored and reached nominal number of lines per frame
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{
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float shiftSamples = 0.0f;
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// Slow sync: slight adjustment is needed
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if (m_hSyncShiftCount != 0 && m_settings.m_hSync)
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{
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shiftSamples = m_hSyncShiftSum / m_hSyncShiftCount;
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m_sampleIndex = shiftSamples;
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m_hSyncShiftSum = 0.0f;
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m_hSyncShiftCount = 0;
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m_hSyncErrorCount = 0;
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}
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m_registeredTVScreen->renderImage(0,
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shiftSamples < -1.0f ? -1.0f : (shiftSamples > 1.0f ? 1.0f : shiftSamples));
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m_lineIndex = 0;
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m_rowIndex = 0;
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}
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m_registeredTVScreen->selectRow(m_rowIndex);
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}
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};
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