diff options
| author | Antti Palosaari <crope@iki.fi> | 2014-08-24 20:11:27 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2014-09-21 16:42:33 -0300 |
| commit | b8843c7979fc8ea54efeaef8e9d524c33c42f099 (patch) | |
| tree | 7feec03a9df82458297b8463442113bc4b6ac14b /drivers/media/usb/airspy | |
| parent | 8880f2cbdb0a981ea8e6a5ce2915abac26120523 (diff) | |
[media] airspy: 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/usb/airspy')
| -rw-r--r-- | drivers/media/usb/airspy/airspy.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/media/usb/airspy/airspy.c b/drivers/media/usb/airspy/airspy.c index 994c9914ab9b..4069234abed5 100644 --- a/drivers/media/usb/airspy/airspy.c +++ b/drivers/media/usb/airspy/airspy.c @@ -250,16 +250,18 @@ static unsigned int airspy_convert_stream(struct airspy *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 + 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->dev, "slen=%d samples=%u msecs=%lu sample rate=%lu\n", - src_len, samples, MSECS, - samples * 1000UL / MSECS); + dev_dbg(s->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n", + src_len, samples, msecs, + samples * 1000UL / msecs); } /* total number of samples */ |