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[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>
authored by
Antti Palosaari
and committed by
Mauro Carvalho Chehab
b8843c79
8880f2cb
+6
-4
+6
-4
drivers/media/usb/airspy/airspy.c
+6
-4
drivers/media/usb/airspy/airspy.c
···
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dst_len = 0;
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}
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-
/* calculate samping rate and output it in 10 seconds intervals */
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+
/* calculate sample rate and output it in 10 seconds intervals */
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if (unlikely(time_is_before_jiffies(s->jiffies_next))) {
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#define MSECS 10000UL
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unsigned int msecs = jiffies_to_msecs(jiffies -
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s->jiffies_next + msecs_to_jiffies(MSECS));
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unsigned int samples = s->sample - s->sample_measured;
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s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
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s->sample_measured = s->sample;
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dev_dbg(s->dev, "slen=%d samples=%u msecs=%lu sample rate=%lu\n",
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src_len, samples, MSECS,
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samples * 1000UL / MSECS);
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dev_dbg(s->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n",
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src_len, samples, msecs,
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samples * 1000UL / msecs);
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}
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/* total number of samples */