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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-03-22 06:37:32 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-03-22 09:46:45 -0300 |
| commit | 48f72a1a4caaaac6cc22b6c4b6471286955a590d (patch) | |
| tree | bd2fcff2352cc51a87292dfde0f3ed5a9028cd9e /drivers/media/dvb-frontends | |
| parent | f35d09db0e61009679e41cc5afa2d205b99c3816 (diff) | |
| download | blackbird-op-linux-48f72a1a4caaaac6cc22b6c4b6471286955a590d.tar.gz blackbird-op-linux-48f72a1a4caaaac6cc22b6c4b6471286955a590d.zip | |
[media] drxk: fix CNR calculus
Changeset 8f3741e accidentally broke the CNR estimation. It should
be calculated as "a + b - c". However, previously, the subtraction
by c only occurred if SNR would be positive, due to a bad binding
to DVBv3 API.
This also fixes the following warning:
drivers/media/dvb-frontends/drxk_hard.c:2556:6: warning: variable 'c' set but not used [-Wunused-but-set-variable]
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb-frontends')
| -rw-r--r-- | drivers/media/dvb-frontends/drxk_hard.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/dvb-frontends/drxk_hard.c b/drivers/media/dvb-frontends/drxk_hard.c index fc93bd396cf4..55a4c22ac2d4 100644 --- a/drivers/media/dvb-frontends/drxk_hard.c +++ b/drivers/media/dvb-frontends/drxk_hard.c @@ -2628,7 +2628,7 @@ static int GetDVBTSignalToNoise(struct drxk_state *state, /* log(x) x = (16bits + 16bits) << 15 ->32 bits */ c = Log10Times100(SqrErrIQ); - iMER = a + b; + iMER = a + b - c; } *pSignalToNoise = iMER; |
