diff options
| author | Antti Palosaari <crope@iki.fi> | 2014-08-25 06:44:13 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2014-09-21 23:42:37 +0400 |
| commit | b538a8e85b2b2fbb954da2b9189eaf18cf9098bf (patch) | |
| tree | 67d0611c92abe3cccd855fb0c708d54ebd8f0d54 /drivers/media/dvb-frontends/rtl2832_sdr.c | |
| parent | abfc8d66d72ba183eb3b5d344fd1ec17233db8bb (diff) | |
| download | linux-b538a8e85b2b2fbb954da2b9189eaf18cf9098bf.tar.xz | |
[media] rtl2832_sdr: enhance sample rate debug calculation precision
Sample rate calculation gives a little bit too large results because
in real life there was around one milliseconds (~one usb packet) too
much data for given time. Calculate time more accurate in order to
provide better results.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/dvb-frontends/rtl2832_sdr.c')
| -rw-r--r-- | drivers/media/dvb-frontends/rtl2832_sdr.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/media/dvb-frontends/rtl2832_sdr.c b/drivers/media/dvb-frontends/rtl2832_sdr.c index 029189d8be88..9211ddeff227 100644 --- a/drivers/media/dvb-frontends/rtl2832_sdr.c +++ b/drivers/media/dvb-frontends/rtl2832_sdr.c @@ -365,17 +365,19 @@ static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_state *s, dst_len = 0; } - /* calculate samping rate and output it in 10 seconds intervals */ + /* calculate sample rate and output it in 10 seconds intervals */ if (unlikely(time_is_before_jiffies(s->jiffies_next))) { -#define MSECS 10000UL + #define MSECS 10000UL + unsigned int msecs = jiffies_to_msecs(jiffies - + s->jiffies_next + msecs_to_jiffies(MSECS)); unsigned int samples = s->sample - s->sample_measured; s->jiffies_next = jiffies + msecs_to_jiffies(MSECS); s->sample_measured = s->sample; dev_dbg(&s->udev->dev, - "slen=%d samples=%u msecs=%lu sampling rate=%lu\n", - src_len, samples, MSECS, - samples * 1000UL / MSECS); + "slen=%u samples=%u msecs=%u sample rate=%lu\n", + src_len, samples, msecs, + samples * 1000UL / msecs); } /* total number of I+Q pairs */ |