From b16207097440cb1b73dc230cdd8e7d1739805c49 Mon Sep 17 00:00:00 2001
From: Tomas Mudrunka <tomas@mudrunka.cz>
Date: Thu, 2 Aug 2012 17:35:30 +0200
Subject: [PATCH] Realtime equalizer-like graphing of goertzel output

---
 c/goertzel/histogram.pl | 38 ++++++++++++++++++++++++++++++++++++++
 c/goertzel/histogram.sh |  2 ++
 2 files changed, 40 insertions(+)
 create mode 100755 c/goertzel/histogram.pl
 create mode 100755 c/goertzel/histogram.sh

diff --git a/c/goertzel/histogram.pl b/c/goertzel/histogram.pl
new file mode 100755
index 0000000..c27f28c
--- /dev/null
+++ b/c/goertzel/histogram.pl
@@ -0,0 +1,38 @@
+#!/usr/bin/env perl
+#This script processes output of goertzel and paints histogram
+
+use strict;
+use warnings;
+use Term::ReadKey;
+
+
+sub bar($$$) {
+	my ($value,$max,$prefix) = @_;
+	my ($wchar, $hchar, $wpixels, $hpixels) = GetTerminalSize();
+	$value = ($value/$max)*($wchar-length($prefix));
+	return $prefix."#" x $value." " x ($wchar-$value-length($prefix));
+}
+
+sub trim($) {
+	my $string = shift;
+	$string =~ s/^\s+//;
+	$string =~ s/\s+$//;
+	return $string;
+}
+
+print "\033[H\033[2J";
+
+my @header = split('\t', <STDIN>);
+
+while(<STDIN>) {
+	my @values = split('\t', $_);
+	my $i=0;
+	print "\033[H";
+	foreach my $i (1..$#values) {
+		print bar($values[$i],10,sprintf("%8s ",trim($header[$i])))."\n";
+	}
+	print "Time: ".$values[0]."                   \n";
+	print "                           \n";
+}
+
+exit 0;
diff --git a/c/goertzel/histogram.sh b/c/goertzel/histogram.sh
new file mode 100755
index 0000000..ac26b7e
--- /dev/null
+++ b/c/goertzel/histogram.sh
@@ -0,0 +1,2 @@
+#!/bin/sh
+./goertzel -f 10 -f 20 -f 40 -f 60 -f 100 -f 200 -f 300 -f 400 -f 500 -f 1000 -f 2000 -f 4000 -f 6100 -f 10000 -f 20000 2>/dev/null | ./histogram.pl
-- 
2.30.2