From 313334d54a07752e7cb9198284e5329a7e381176 Mon Sep 17 00:00:00 2001
From: Dimitri Stolnikov <horiz0n@gmx.net>
Date: Fri, 6 Apr 2012 15:58:12 +0200
Subject: [PATCH] fix scaling in LUT generation

---
 apps/osmosdr_source.grc | 176 ++++++++++++++++++++--------------------
 apps/osmosdr_source.py  |   6 +-
 lib/rtl_source_c.cc     |   4 +-
 3 files changed, 93 insertions(+), 93 deletions(-)

diff --git a/apps/osmosdr_source.grc b/apps/osmosdr_source.grc
index de97388..e661ae1 100644
--- a/apps/osmosdr_source.grc
+++ b/apps/osmosdr_source.grc
@@ -1,6 +1,6 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Fri Apr  6 14:59:58 2012</timestamp>
+  <timestamp>Fri Apr  6 15:57:44 2012</timestamp>
   <block>
     <key>options</key>
     <param>
@@ -169,93 +169,6 @@
       <value>0</value>
     </param>
   </block>
-  <block>
-    <key>wxgui_fftsink2</key>
-    <param>
-      <key>id</key>
-      <value>wxgui_fftsink2_0</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>complex</value>
-    </param>
-    <param>
-      <key>title</key>
-      <value>FFT Plot</value>
-    </param>
-    <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
-    </param>
-    <param>
-      <key>baseband_freq</key>
-      <value>freq</value>
-    </param>
-    <param>
-      <key>y_per_div</key>
-      <value>5</value>
-    </param>
-    <param>
-      <key>y_divs</key>
-      <value>10</value>
-    </param>
-    <param>
-      <key>ref_level</key>
-      <value>145</value>
-    </param>
-    <param>
-      <key>ref_scale</key>
-      <value>2.0</value>
-    </param>
-    <param>
-      <key>fft_size</key>
-      <value>1024</value>
-    </param>
-    <param>
-      <key>fft_rate</key>
-      <value>15</value>
-    </param>
-    <param>
-      <key>peak_hold</key>
-      <value>False</value>
-    </param>
-    <param>
-      <key>average</key>
-      <value>False</value>
-    </param>
-    <param>
-      <key>avg_alpha</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>win</key>
-      <value>None</value>
-    </param>
-    <param>
-      <key>win_size</key>
-      <value></value>
-    </param>
-    <param>
-      <key>grid_pos</key>
-      <value></value>
-    </param>
-    <param>
-      <key>notebook</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(681, 242)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
   <block>
     <key>variable_slider</key>
     <param>
@@ -311,6 +224,93 @@
       <value>0</value>
     </param>
   </block>
+  <block>
+    <key>wxgui_fftsink2</key>
+    <param>
+      <key>id</key>
+      <value>wxgui_fftsink2_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value>FFT Plot</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>baseband_freq</key>
+      <value>freq</value>
+    </param>
+    <param>
+      <key>y_per_div</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>y_divs</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>ref_level</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>ref_scale</key>
+      <value>2.0</value>
+    </param>
+    <param>
+      <key>fft_size</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>fft_rate</key>
+      <value>15</value>
+    </param>
+    <param>
+      <key>peak_hold</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>average</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>avg_alpha</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>win</key>
+      <value>None</value>
+    </param>
+    <param>
+      <key>win_size</key>
+      <value></value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value></value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(681, 242)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
   <connection>
     <source_block_id>osmosdr_source_c_0</source_block_id>
     <sink_block_id>wxgui_fftsink2_0</sink_block_id>
diff --git a/apps/osmosdr_source.py b/apps/osmosdr_source.py
index a6bde0d..f2ed63d 100755
--- a/apps/osmosdr_source.py
+++ b/apps/osmosdr_source.py
@@ -38,10 +38,10 @@ class osmosdr_source_c(grc_wxgui.top_block_gui):
 			self.GetWin(),
 			fft_size=1024,
 			sample_rate=samp_rate,
-			ref_scale=50.0,
-			ref_level=145,
+			ref_scale=2.0,
+			ref_level=0,
 			y_divs=10,
-			fft_rate=20,
+			fft_rate=15,
 			average=False,
 			avg_alpha=0.5
 		)
diff --git a/lib/rtl_source_c.cc b/lib/rtl_source_c.cc
index 82001f9..6bdaed2 100644
--- a/lib/rtl_source_c.cc
+++ b/lib/rtl_source_c.cc
@@ -79,8 +79,8 @@ rtl_source_c::rtl_source_c (const std::string &args)
   // create a lookup table for gr_complex values
   for (unsigned int i = 0; i <= 0xffff; i++)
   {
-    _lut.push_back( gr_complex( ((i >> 8) - 127) * 0.00787,
-                                ((i & 0xff) - 127) * 0.00787 ) );
+    _lut.push_back( gr_complex( (float(i >> 8) - 127.0) * 0.00787,
+                                (float(i & 0xff) - 127.0) * 0.00787 ) );
   }
 
   std::cout << "Opening " << rtlsdr_get_device_name(dev_index) << std::endl;