#!/bin/bash

set -ue

TMPFILE="/dev/shm/plot-timing.tmp"
IMAGE="timing.png"

echo ; figlet "plot timing" ; echo
wc WS/mp4.timing | tee -a WS/log

if [ $# == 1 ]
then
	sequence=$1
else
	sequence="escadrille"
fi

grep $sequence WS/mp4.timing | tail -3600 | awk '				\
BEGIN	{							\
	nbrames=360;						\
	for (foo=0; foo<nbrames; foo++) {			\
		mini[foo]  = 666;				\
		maxi[foo]  = -42;				\
		count[foo] = 0;					\
		}						\
	}							\
								\
	{							\
	accu[$2] += $3;						\
	count[$2]++;						\
	if (mini[$2] > $3)	mini[$2] = $3;			\
	if (maxi[$2] < $3)	maxi[$2] = $3;			\
	}							\
								\
END	{							\
	for (foo=0; foo<nbrames; foo++) {			\
		if (count[foo] > 0) {				\
			mean = accu[foo] / count[foo];		\
			printf "%4d %4f %4d %4d\n", foo, mean, 	\
				mini[foo], maxi[foo];		\
			}					\
		}						\
	}							\
' > $TMPFILE

# cat -n $TMPFILE | tail		# ; exit

gnuplot	<< __EOC__
	set term png size 1024,768
	set output "timing.png"
	set grid
	set xrange [:360]
	set yrange [0:]
	set title "Séquence '${sequence}'"
	set xlabel "numéro de la trame"
	set ylabel "temps en secondes"
	plot "/dev/shm/plot-timing.tmp" u 1:4 w l lc "#ff0000" t "maximum",	\
	     "/dev/shm/plot-timing.tmp" u 1:3 w l lc "#0000ff" t "minimum",	\
	     "/dev/shm/plot-timing.tmp" u 1:2 w l lc "#000000" t "moyenne",
__EOC__

convert -negate -colorspace gray -level -33% $IMAGE WS/negatif.png