From c486a9ee81de77faba90b5aa0b2e63eb11ec47f8 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Thu, 17 Nov 2011 12:03:11 -0200 Subject: [PATCH 1/1] Remove redundant duplicate pressure samples At least the Suunto pressure transmitter seems to be pretty "quantisized", and it will send identical samples for a while until the pressure changes enough. Then subsurface gives this silly flat line with a sudden jump downwards, which *could* be you suddenly taking a deep breath after holding it for a while, but almost certainly it's a sensor issue. So just remove successive identical pressure readings. They aren't interesting, and subsurface will actually do a good job of interpolating it according to SAC rate instead. And they just make the XML look worse. Signed-off-by: Linus Torvalds --- dive.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/dive.c b/dive.c index dad0e23..cd797d2 100644 --- a/dive.c +++ b/dive.c @@ -239,16 +239,26 @@ struct dive *fixup_dive(struct dive *dive) int i; double depthtime = 0; int lasttime = 0; + int lastindex = -1; int start = -1, end = -1; int maxdepth = 0, mintemp = 0; int lastdepth = 0; - int lasttemp = 0; + int lasttemp = 0, lastpressure = 0; for (i = 0; i < dive->samples; i++) { struct sample *sample = dive->sample + i; int time = sample->time.seconds; int depth = sample->depth.mm; int temp = sample->temperature.mkelvin; + int pressure = sample->cylinderpressure.mbar; + int index = sample->cylinderindex; + + /* Remove duplicate redundant pressure information */ + if (pressure == lastpressure && index == lastindex) + sample->cylinderpressure.mbar = 0; + + lastindex = index; + lastpressure = pressure; if (lastdepth) end = time; -- 2.43.0