From: beralt <beralt@beralt.nl>
Date: Mon, 25 Nov 2013 10:59:16 +0000 (+0100)
Subject: linuxdvb: convert snr units to dB
X-Git-Tag: v4.1~2346^2
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F307%2Fhead;p=thirdparty%2Ftvheadend.git

linuxdvb: convert snr units to dB
---

diff --git a/src/input/mpegts/linuxdvb/linuxdvb_frontend.c b/src/input/mpegts/linuxdvb/linuxdvb_frontend.c
index f49c98891..0e3aef10f 100644
--- a/src/input/mpegts/linuxdvb/linuxdvb_frontend.c
+++ b/src/input/mpegts/linuxdvb/linuxdvb_frontend.c
@@ -568,10 +568,9 @@ linuxdvb_frontend_monitor ( void *aux )
       }
     }
     if(fe_properties[3].u.st.len > 0) {
-      /* note that decibel scale means 0.0001 dB units */
-      /* TODO: snr is not unsigned, but signed! */
+      /* note that decibel scale means 1 = 0.0001 dB units here */
       if(fe_properties[3].u.st.stat[0].scale == FE_SCALE_DECIBEL)
-        mmi->mmi_stats.snr = fe_properties[3].u.st.stat[0].uvalue;
+        mmi->mmi_stats.snr = fe_properties[3].u.st.stat[0].svalue * 0.0001;
       /* TODO: handle other scales */
     }
     /* Calculate PER from PRE_ERROR and TOTAL_BIT_COUNT */