From 713826cbf428e48935a2284705a09ff6e0cee2bd Mon Sep 17 00:00:00 2001
From: f4exb <f4exb06@gmail.com>
Date: Fri, 24 Feb 2017 23:25:09 +0100
Subject: [PATCH] ATV demod: upadte on horizontal sync

---
 plugins/channelrx/demodatv/atvdemod.cpp | 21 ++++++++++++++++-----
 plugins/channelrx/demodatv/atvdemod.h   |  1 +
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/plugins/channelrx/demodatv/atvdemod.cpp b/plugins/channelrx/demodatv/atvdemod.cpp
index e9ef741dc..deee11974 100644
--- a/plugins/channelrx/demodatv/atvdemod.cpp
+++ b/plugins/channelrx/demodatv/atvdemod.cpp
@@ -35,6 +35,7 @@ ATVDemod::ATVDemod() :
     m_intRowIndex(0),
     m_intSynchroPoints(0),
     m_blnSynchroDetected(false),
+    m_blnLineSynchronized(false),
     m_blnVerticalSynchroDetected(false),
     m_fltLevelSynchroTop(0.0),
     m_fltLevelSynchroBlack(1.0),
@@ -423,14 +424,24 @@ void ATVDemod::feed(const SampleVector::const_iterator& begin, const SampleVecto
             m_blnSynchroDetected=false;
             m_blnImageDetecting=true;
 
-            //New line + Interleaving
-            m_intRowIndex ++;
-            m_intRowIndex ++;
             m_intColIndex=0;
 
-            if(m_intRowIndex<m_intNumberOfLines)
+            if((m_blnSynchroDetected==false) || (m_blnLineSynchronized==true))
             {
-                m_objRegisteredATVScreen->selectRow(m_intRowIndex);
+                //New line + Interleaving
+                m_intRowIndex ++;
+                m_intRowIndex ++;
+
+                if(m_intRowIndex<m_intNumberOfLines)
+                {
+                    m_objRegisteredATVScreen->selectRow(m_intRowIndex);
+                }
+
+                m_blnLineSynchronized=false;
+            }
+            else
+            {
+                m_blnLineSynchronized=m_blnSynchroDetected;
             }
 
             m_fltAmpLineAverage=0.0f;
diff --git a/plugins/channelrx/demodatv/atvdemod.h b/plugins/channelrx/demodatv/atvdemod.h
index 764bf31ec..f48d60698 100644
--- a/plugins/channelrx/demodatv/atvdemod.h
+++ b/plugins/channelrx/demodatv/atvdemod.h
@@ -107,6 +107,7 @@ private:
        int m_intSynchroPoints;
 
        bool m_blnSynchroDetected;
+       bool m_blnLineSynchronized;
        bool m_blnImageDetecting;
        bool m_blnVerticalSynchroDetected;