change snr / snr dB caluculation a bit

[enigma2.git] / lib / dvb / frontend.cpp

diff --git a/lib/dvb/frontend.cpp b/lib/dvb/frontend.cpp
index af974c81f7cbcf2a6a46cd27f703a964de134f5c..f18c3b9e2fb33869632da4a74bd2eb1cdcce886c 100644 (file)
--- a/lib/dvb/frontend.cpp
+++ b/lib/dvb/frontend.cpp
@@ -718,6 +718,7 @@ int eDVBFrontend::readFrontendData(int type)
                case signalQuality:
                case signalQualitydB: /* this will move into the driver */
                {
+                       int sat_max = 1600; // for stv0288 / bsbe2
                        int ret = 0x12345678;
                        uint16_t snr=0;
                        if (m_simulate)
@@ -779,8 +780,8 @@ int eDVBFrontend::readFrontendData(int type)
                                        snr_in_db = fval1;
                                }
 #endif
+                               sat_max = 1750;
                                ret = (int)(snr_in_db * 100);
-                               ret -= 150; // -1.5db for latest bcm4501 firmware..
                        }
                        else if (strstr(m_description, "Alps BSBE1 C01A") ||
                                !strcmp(m_description, "Alps -S(STV0288)"))
@@ -830,6 +831,7 @@ int eDVBFrontend::readFrontendData(int type)
                                !strcmp(m_description, "Philips -S") ||
                                !strcmp(m_description, "LG -S") )
                        {
+                               sat_max = 1500;
                                ret = (int)((snr-39075)/17.647);
                        } else if (!strcmp(m_description, "Alps BSBE2"))
                        {
@@ -858,8 +860,8 @@ int eDVBFrontend::readFrontendData(int type)
                                        return snr;
                                switch(m_type)
                                {
-                                       case feSatellite: // we assume a max of 16.0db here
-                                               return ret >= 1600 ? 65536 : ret * 65536 / 1600;
+                                       case feSatellite:
+                                               return ret >= sat_max ? 65536 : ret * 65536 / sat_max;
                                        case feCable: // we assume a max of 42db here
                                                return ret >= 4200 ? 65536 : ret * 65536 / 4200;
                                        case feTerrestrial: // we assume a max of 24db here