#!/usr/bin/env bash
set -e

# SoX Resampler Library       Copyright (c) 2007-15 robs@users.sourceforge.net
# Licence for this file: LGPL v2.1                  See LICENCE for details.

# Tests varying bandwidth.



tool=./3-options-input-fn
w=$(echo -e "`sox --ver |sed 's/.*SoX v//'` d\n14.4.1 k"|sort -Vr|head -1|sed 's/.* //')

spec="spectrogram -z120 -Z-20 -w$w -ho"
ext=f32; e=0
rate1=48000
rate2=44100

for n in 1 2; do

rate1n=`expr $rate1 / 2`

#sox -r $rate1 -n 0.$ext synth 1s sq pad .03 .03  gain -1
sox -r $rate1 -n 0.$ext synth 8 sin 0:$rate1n gain -1

for pass in `seq 79 5 99`; do
	f=bw1-$rate2-p`printf %02u $pass`-$w
	$tool $rate1 $rate2 1 $e $e 4 0 $pass < 0.$ext | sox -c1 -r$rate2 -t $ext - -n $spec $f.png -c "bw-test pass:$pass stop:100"
done

for pass in `seq 79 5 99`; do
	f=bw2-$rate2-p`printf %02u $pass`-$w
	stop=`expr 200 - $pass`
	$tool $rate1 $rate2 1 $e $e 4 0 $pass $stop < 0.$ext | sox -c1 -r$rate2 -t $ext - -n $spec $f.png -c "bw-test pass:$pass stop:$stop"
done

r=$rate1; rate1=$rate2; rate2=$r

done

rm 0.$ext