Support spectrum analyzer visualization (need span-plugin)0.0.6.1

1 files changed, 110 insertions, 0 deletions

diff --git a/span.c b/span.c
new file mode 100644
index 0000000..de007ea
--- /dev/null
+++ b/span.c
@@ -0,0 +1,110 @@
+/*
+ * targavfd plugin for VDR (C++)
+ *
+ * (C) 2010 Andreas Brachold <vdr07 AT deltab de>
+ *     Span handling suggest by span-plugin
+ *
+ * This targavfd plugin is free software: you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License as published 
+ * by the Free Software Foundation, version 3 of the License.
+ *
+ * See the files README and COPYING for details.
+ *
+ */
+
+#include "targavfd.h"
+#include "span.h"
+
+/*
+ * Spectrum Analyzer visualization
+ * need as middleware span-plugin
+ */
+bool cVFDWatch::RenderSpectrumAnalyzer()
+{
+  bool bDraw = false;
+  /*if ( theSetup.m_bEnableSpectrumAnalyzer )*/ {
+    if (cPluginManager::CallFirstService(SPAN_GET_BAR_HEIGHTS_ID, NULL)) {
+      Span_GetBarHeights_v1_0 gbh;
+
+      int bands = 19;
+      int falloff = 8;
+      int i,x,y;
+
+      unsigned int *barHeights = new unsigned int[bands];
+      unsigned int *barHeightsLeftChannel = new unsigned int[bands];
+      unsigned int *barHeightsRightChannel = new unsigned int[bands];
+      unsigned int volumeLeftChannel;
+      unsigned int volumeRightChannel;
+      unsigned int volumeBothChannels;
+      unsigned int *barPeaksBothChannels = new unsigned int[bands];
+      unsigned int *barPeaksLeftChannel  = new unsigned int[bands];
+      unsigned int *barPeaksRightChannel = new unsigned int[bands];
+
+      gbh.bands                     = bands;
+      gbh.barHeights                = barHeights;
+      gbh.barHeightsLeftChannel     = barHeightsLeftChannel;
+      gbh.barHeightsRightChannel    = barHeightsRightChannel;
+      gbh.volumeLeftChannel         = &volumeLeftChannel;
+      gbh.volumeRightChannel        = &volumeRightChannel;
+      gbh.volumeBothChannels        = &volumeBothChannels;
+      gbh.name                      = "targavfd";
+      gbh.falloff                   = falloff;
+      gbh.barPeaksBothChannels      = barPeaksBothChannels;
+      gbh.barPeaksLeftChannel       = barPeaksLeftChannel;
+      gbh.barPeaksRightChannel      = barPeaksRightChannel;
+
+      if ( cPluginManager::CallFirstService(SPAN_GET_BAR_HEIGHTS_ID, &gbh )) {
+
+        int barWidth = (this->Width() - bands)/bands;
+        int saEndY = this->Height();
+  
+        this->clear(); 
+
+        for ( i=0; i < bands; i++ ) {
+          // draw bar
+          y = (barHeights[i]*(saEndY))/SPAN_HEIGHT;
+          x = (barWidth*i) + i;
+          this->Rectangle(x,
+              saEndY,
+              x + barWidth - 1,
+              saEndY - y,
+              true);
+
+          // draw peak
+          y = (barPeaksBothChannels[i]*(saEndY))/SPAN_HEIGHT;
+          if ( y   > 0) {
+            this->Rectangle(x,
+                saEndY - y,
+                x + barWidth - 1,
+                saEndY - y,
+                true);
+          }
+        }
+        bDraw = true;
+      }
+      delete [] barHeights;
+      delete [] barHeightsLeftChannel;
+      delete [] barHeightsRightChannel;
+      delete [] barPeaksBothChannels;
+      delete [] barPeaksLeftChannel;
+      delete [] barPeaksRightChannel;
+    }
+  }
+  return bDraw;
+}
+
+/*
+ * Report presence of Spectrum Analyzer visualization
+ * from span-plugin requested 
+ */
+bool cPluginTargaVFD::Service(const char *Id, void *Data) {
+  if (Id && strcmp(Id, SPAN_CLIENT_CHECK_ID) == 0) {
+    if ( /*theSetup.m_bEnableSpectrumAnalyzer &&*/ (Data != NULL) ) {
+      *((Span_Client_Check_1_0*)Data)->isActive = true;
+    }
+    return true;
+  }
+  return false;
+}
+
+