#define INRANGE(X,Y,Z) (((X<=Y) && (Y<=Z))||((Z<=Y) && (Y<=X)) ? 1 : 0)
+/* unsigned 32 bit division */
+static inline uint32_t fe_udiv(uint32_t a, uint32_t b)
+{
+ return (a + b / 2) / b;
+}
+
int eDVBFrontend::readFrontendData(int type)
{
switch(type)
snr_in_db = fval1;
}
#endif
- return (int)(snr_in_db * 100.0);
+ return (int)(snr_in_db * 100);
}
else if (strstr(m_description, "Alps BSBE1 C01A") ||
!strcmp(m_description, "Alps -S(STV0288)"))
!strcmp(m_description, "Philips -S") ||
!strcmp(m_description, "LG -S") )
{
- float snr_in_db=(snr-39075)/1764.7;
- return (int)(snr_in_db * 100.0);
+ return (int)((snr-39075)/17.647);
} else if (!strcmp(m_description, "Alps BSBE2"))
{
- return (int)((snr >> 7) * 10.0);
- } /* else
+ return (int)((snr >> 7) * 10);
+ } else if (!strcmp(m_description, "Philips CU1216Mk3"))
+ {
+ int mse = (~snr) & 0xFF;
+ switch (parm_u_qam_modulation) {
+ case QAM_16: return fe_udiv(1950000, (32 * mse) + 138) + 1000;
+ case QAM_32: return fe_udiv(2150000, (40 * mse) + 500) + 1350;
+ case QAM_64: return fe_udiv(2100000, (40 * mse) + 500) + 1250;
+ case QAM_128: return fe_udiv(1850000, (38 * mse) + 400) + 1380;
+ case QAM_256: return fe_udiv(1800000, (100 * mse) + 40) + 2030;
+ default: break;
+ }
+ return 0;
+ } else if (!strcmp(m_description, "Philips TU1216"))
+ {
+ snr = 0xFF - (snr & 0xFF);
+ if (snr != 0)
+ return (int)(-100 * (log10(snr) - log10(255)));
+ return 0;
+ }
+/* else
eDebug("no SNR dB calculation for frontendtype %s yet", m_description); */
return 0x12345678;
}