Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b538a8e8 authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
Browse files

[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: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent abfc8d66

drivers/media/dvb-frontends/rtl2832_sdr.c

+7 −5
Original line number Diff line number Diff line
@@ -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

		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 */