AM Modulator: new shortest possible vertical sync compatible with ATV demod

plugins/channeltx/modatv/atvmod.cpp

@@ -826,6 +826,21 @@ void ATVMod::applyStandard()
 
     switch(m_config.m_atvStd)
     {
+    case ATVStdShortInterleaved: // Follows loosely the 405 lines standard
+        // what is left in a 64 us line for the image
+        m_nbImageLines     = m_nbLines - 2; // lines less the total number of sync lines
+        m_nbImageLines2    = m_nbImageLines / 2;
+        m_interleaved       = true;
+        m_nbSyncLinesHeadE = 1; // number of sync lines on the top of a frame even
+        m_nbSyncLinesHeadO = 1; // number of sync lines on the top of a frame odd
+        m_nbSyncLinesBottom = 0;
+        m_nbLongSyncLines  = 1;
+        m_nbHalfLongSync   = 0;
+        m_nbWholeEqLines   = 0;
+        m_singleLongSync   = true;
+        m_nbBlankLines     = 1;
+        m_blankLineLvel    = 0.7f;
+        break;
     case ATVStd405: // Follows loosely the 405 lines standard
         // what is left in a 64 us line for the image
         m_nbImageLines     = m_nbLines - 15; // lines less the total number of sync lines

plugins/channeltx/modatv/atvmod.h

@@ -42,7 +42,8 @@ public:
     {
         ATVStdPAL625,
 		ATVStdPAL525,
-		ATVStd405
+		ATVStd405,
+		ATVStdShortInterleaved
     } ATVStd;
 
     typedef enum

plugins/channeltx/modatv/atvmodgui.ui

@@ -629,6 +629,11 @@
           <string>405L</string>
          </property>
         </item>
+        <item>
+         <property name="text">
+          <string>SHi</string>
+         </property>
+        </item>
        </widget>
       </item>
       <item>

plugins/channeltx/modatv/atvmodplugin.cpp

@@ -23,7 +23,7 @@
 
 const PluginDescriptor ATVModPlugin::m_pluginDescriptor = {
     QString("ATV Modulator"),
-    QString("3.3.2"),
+    QString("3.3.3"),
     QString("(c) Edouard Griffiths, F4EXB"),
     QString("https://github.com/f4exb/sdrangel"),
     true,