#!/usr/bin/liquidsoap

# Example liquidsoap streaming from op25 to icecast
# (c) 2019-2021 gnorbury@bondcar.com, wllmbecks@gmail.com
#

set("log.stdout", true)
set("log.file", false)
set("log.level", 1)

# Make the native sample rate compatible with op25
set("frame.audio.samplerate", 8000)

# ==========================================================
# 📢 ICECAST CONFIGURATION USING ENVIRONMENT VARIABLES
# Use get_env("VAR_NAME", "default_value")
# ==========================================================
ICE_HOST = get_env("ICE_HOST", "ic2.vpn.cusano.net")
ICE_PORT = int_of_string(get_env("ICE_PORT", "8000"))
ICE_MOUNT = get_env("ICE_MOUNT", "mountpoint")
ICE_PASSWORD = get_env("ICE_PASSWORD", "hackme")
ICE_DESCRIPTION = get_env("ICE_DESCRIPTION", "op25")
ICE_GENRE = get_env("ICE_GENRE", "Public Safety")
# ==========================================================

input = mksafe(input.external(buffer=0.25, channels=2, samplerate=8000, restart_on_error=false, "./audio.py -x 2.5 -s"))
# Consider increasing the buffer value on slow systems such as RPi3. e.g. buffer=0.25

# Compression
input = compress(input, attack = 2.0, gain = 0.0, knee = 13.0, ratio = 2.0, release = 12.3, threshold = -18.0)

# Normalization
input = normalize(input, gain_max = 6.0, gain_min = -6.0, target = -16.0, threshold = -65.0)

# ==========================================================
# OUTPUT: Referencing the new variables
# ==========================================================
output.icecast(
    %mp3(bitrate=16, samplerate=22050, stereo=false), 
    description=ICE_DESCRIPTION, 
    genre=ICE_GENRE, 
    url="", 
    fallible=false, 
    host=ICE_HOST, 
    port=ICE_PORT, 
    mount=ICE_MOUNT, 
    password=ICE_PASSWORD, 
    mean(input)
)