#!/usr/bin/env bash

# Make sox spectrogram

source /etc/birdnet/birdnet.conf

# Read the logging level from the configuration option

LOGGING_LEVEL="${LogLevel_SpectrogramViewerService}"

# If empty for some reason default to log level of error

[ -z $LOGGING_LEVEL ] && LOGGING_LEVEL='error'

# Additionally if we're at debug or info level then allow printing of script commands and variables

if [ "$LOGGING_LEVEL" == "info" ] || [ "$LOGGING_LEVEL" == "debug" ];then

# Enable printing of commands/variables etc to terminal for debugging

set -x

fi

next=0

looptime=$(( RECORDING_LENGTH * 2 / 3 ))

touch "$HOME/BirdSongs/StreamData/analyzing_now.txt"

# Continuously loop generating a spectrogram

inotifywait -m -e close_write "$HOME/BirdSongs/StreamData/analyzing_now.txt" |

while read; do

now=$(date +%s)

if (( now > next )); then

analyzing_now="$(<$HOME/BirdSongs/StreamData/analyzing_now.txt)"

if [ -n "${analyzing_now}" ] && [ -f "${analyzing_now}" ]; then

spectrogram_png=${EXTRACTED}/spectrogram.png

sox -V1 "${analyzing_now}" -n remix 1 rate 24k spectrogram -c "${analyzing_now//$HOME\//}" -o "${spectrogram_png}"

fi

next=$(( now + looptime ))

fi

done