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ATV Demodulator: implement double buffering

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This commit is contained in:
Vort
2020-08-10 15:54:34 +03:00
committed by f4exb
parent 36ab7ada08
commit db072e985f
4 changed files with 46 additions and 35 deletions
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plugins/channelrx/demodatv/atvdemodsink.cpp
+2 -2
View File
@@ -484,7 +484,7 @@ void ATVDemodSink::applyChannelSettings(int channelSampleRate, int channelFreque
m_samplesPerLine - m_numberSamplesPerLineSignals,
m_settings.m_nbLines - m_numberOfBlackLines
);
m_tvScreenData = m_registeredTVScreen->getData();
m_tvScreenBuffer = m_registeredTVScreen->getBackBuffer();
}
m_fieldIndex = 0;
@@ -576,7 +576,7 @@ void ATVDemodSink::applySettings(const ATVDemodSettings& settings, bool force)
m_samplesPerLine - m_numberSamplesPerLineSignals,
m_settings.m_nbLines - m_numberOfBlackLines
);
m_tvScreenData = m_registeredTVScreen->getData();
m_tvScreenBuffer = m_registeredTVScreen->getBackBuffer();
}
m_fieldIndex = 0;
plugins/channelrx/demodatv/atvdemodsink.h
+6 -6
View File
@@ -109,7 +109,7 @@ private:
//*************** ATV PARAMETERS ***************
TVScreenAnalog *m_registeredTVScreen;
std::shared_ptr<TVScreenAnalogData> m_tvScreenData;
std::shared_ptr<TVScreenAnalogBuffer> m_tvScreenBuffer;
//int m_intNumberSamplePerLine;
int m_numberSamplesPerHTopNom; //!< number of samples per horizontal synchronization pulse (pulse in ultra-black) - nominal value
@@ -199,7 +199,7 @@ private:
inline void processSample(float& sample, int& sampleVideo)
{
// Filling pixel on the current line - reference index 0 at start of sync pulse
m_tvScreenData->setSampleValue(m_sampleOffset - m_numberSamplesPerHSync, sampleVideo);
m_tvScreenBuffer->setSampleValue(m_sampleOffset - m_numberSamplesPerHSync, sampleVideo);
if (m_settings.m_hSync)
{
@@ -278,7 +278,7 @@ private:
{
if (m_lineIndex == m_numberOfVSyncLines + 3 && m_fieldIndex == 0)
{
m_registeredTVScreen->renderImage();
m_tvScreenBuffer = m_registeredTVScreen->swapBuffers();
}
if (m_vSyncDetectSampleCount > m_vSyncDetectThreshold &&
@@ -311,7 +311,7 @@ private:
if (m_interleaved)
rowIndex = rowIndex * 2 - m_fieldIndex;
m_tvScreenData->selectRow(rowIndex, m_sampleOffsetFrac);
m_tvScreenBuffer->selectRow(rowIndex, m_sampleOffsetFrac);
}
// Vertical sync is obtained by skipping horizontal sync on the line that triggers vertical sync (new frame)
@@ -320,11 +320,11 @@ private:
if ((m_sampleOffsetDetected > (3 * m_samplesPerLine) / 2) // Vertical sync is first horizontal sync after skip (count at least 1.5 line length)
|| (!m_settings.m_vSync && (m_lineIndex >= m_settings.m_nbLines))) // Vsync ignored and reached nominal number of lines per frame
{
m_registeredTVScreen->renderImage();
m_tvScreenBuffer = m_registeredTVScreen->swapBuffers();
m_lineIndex = 0;
}
m_tvScreenData->selectRow(m_lineIndex, m_sampleOffsetFrac);
m_tvScreenBuffer->selectRow(m_lineIndex, m_sampleOffsetFrac);
}
};