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 <cr...@iki.fi>
---
drivers/media/usb/airspy/airspy.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/media/usb/airspy/airspy.c
b/drivers/media/usb/airspy/airspy.c
index 994c991..4069234 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 */
--
http://palosaari.fi/
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
