Add custom liquid and service files and updated docker

Dockerfile

@@ -27,8 +27,7 @@ RUN apt-get update && \
     libpulse-dev \
     apulse \
     ffmpeg \
-    liquidsoap \
+    liquidsoap 
-    liquidsoap-plugin-all
 
 # Clone the boatbod op25 repository
 RUN git clone -b gr310 https://github.com/boatbod/op25 /op25
@@ -39,6 +38,13 @@ WORKDIR /op25
 # Run the install script to set up op25
 RUN ./install.sh -f
 
+# Update the liquid file
+COPY op25.liq /op25/op25.liq
+
+# Enable the liquidsoap service
+COPY op25-liq.service /etc/systemd/system
+RUN systemctl enable op25-liq
+
 # Install Python dependencies
 COPY requirements.txt /tmp/requirements.txt
 RUN pip3 install --no-cache-dir -r /tmp/requirements.txt

op25-liq.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=op25-liq
+After=syslog.target network.target nss-lookup.target network-online.target
+Requires=network-online.target
+
+[Service]
+User=1000
+Group=1000
+WorkingDirectory=/op25/op25/gr-op25_repeater/apps
+ExecStart=/usr/bin/liquidsoap op25.liq
+RestartSec=5
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target

op25.liq

@@ -0,0 +1,54 @@
+#!/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)
+
+input = mksafe(input.external(buffer=0.25, channels=2, samplerate=8000, restart_on_error=false, "./audio.py -x 1.5 -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)
+
+# Normalization
+input = normalize(input, gain_max = 6.0, gain_min = -6.0, target = -16.0, threshold = -65.0)
+
+
+# LOCAL AUDIO OUTPUT
+# Uncomment the appropriate line below to enable local sound
+#
+# Default audio subsystem
+#out (input)
+#
+# PulseAudio
+#output.pulseaudio(input)
+#
+# ALSA
+#output.alsa(input)
+
+
+
+# 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="localhost", port=8000, mount="mountpoint", password="hackme", mean(input))