Update liquid file to use vars

op25.liq

@@ -11,20 +11,20 @@ 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
-# Longer buffer results in less choppy audio but at the expense of increased latency.
-
-
-
-# OPTIONAL AUDIO SIGNAL PROCESSING BLOCKS 
-# Uncomment to enable
-#
-# High pass filter
-#input = filter.iir.butterworth.high(frequency = 200.0, order = 4, input)
-
-# Low pass filter
-#input = filter.iir.butterworth.low(frequency = 3250.0, order = 4, input)
 
 # Compression
 input = compress(input, attack = 2.0, gain = 0.0, knee = 13.0, ratio = 2.0, release = 12.3, threshold = -18.0)
@@ -32,10 +32,18 @@ input = compress(input, attack = 2.0, gain = 0.0, knee = 13.0, ratio = 2.0, rele
 # Normalization
 input = normalize(input, gain_max = 6.0, gain_min = -6.0, target = -16.0, threshold = -65.0)
 
-
-# ICECAST STREAMING
-# Uncomment to enable output to an icecast server
-# Change the "host", "password", and "mount" strings appropriately first!
-# For metadata to work properly, the host address given here MUST MATCH the address in op25's meta.json file
-#
-output.icecast(%mp3(bitrate=16, samplerate=22050, stereo=false), description="op25", genre="Public Safety", url="", fallible=false, host="ic2.vpn.cusano.net", port=8000, mount="mountpoint", password="hackme", mean(input))
+# ==========================================================
+# 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)
+)