From 155674e74bbcbf1e8473948276068a418a0a19b4 Mon Sep 17 00:00:00 2001
From: tth <sigfood@dinorama.fr>
Date: Wed, 19 Feb 2020 22:39:09 +0100
Subject: [PATCH] first commit

---
 scripts/echomix.sh | 56 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 scripts/echomix.sh

diff --git a/scripts/echomix.sh b/scripts/echomix.sh
new file mode 100644
index 00000000..58a665c5
--- /dev/null
+++ b/scripts/echomix.sh
@@ -0,0 +1,56 @@
+#!/bin/bash
+
+		###############################
+		#           ECHOMIX           #
+		###############################
+
+SRCDIR="Fist"
+DSTDIR="Pong"
+FTMP="/dev/shm/tmp.fimg"
+FDST="/dev/shm/foo.fimg"
+
+#   ------------------------------------------------------------
+
+# count the nomber of picz in the source directory
+#
+NBRE=$(ls -1 ${SRCDIR}/*.fimg | wc -l)
+
+# compute the echo picz offset
+#
+OFFS=$(( NBRE / 4 ))
+
+#   ------------------------------------------------------------
+#		MAIN LOOP
+
+for idx in $(seq 0 $NBRE)
+do
+	# build the two input filenames ...
+	#
+	imgA=$(printf "$SRCDIR/%04d.fimg" $idx)
+	vb=$(( $(( idx + OFFS )) % NBRE))
+	imgB=$(printf "$SRCDIR/%04d.fimg" $vb)
+
+	#	... ant the output filename
+	#
+	dst=$(printf "%s/%05d.png" ${DSTDIR} $idx)
+
+	printf "  %20s   %20s   %8df   %20s\n" $imgA $imgB $vb $dst
+
+	# trying to autocompute the mixing coefficient
+	#
+	compute=" s(${idx} / 16) "
+	K=$(echo $compute | bc -l)
+	printf " %25s  =>  %8.3f\n" "$compute" $K
+
+	#	do the hard floating computation
+	#
+	fimgfx  -v cos010 ${imgB} ${FTMP}
+	fimgops    -k ${K} ${FTMP} ${imgA} mix ${FDST}
+
+	#	write the output as PNG for video encoding
+	#
+	fimg2png ${FDST} ${dst}
+
+done
+
+#   ------------------------------------------------------------