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Fix viper4android on Manjaro KDE Plasma 6 (PipeWire)
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| #!/bin/bash | |
| ############################################################################### | |
| # Viper4Linux Auto-Routing Supervisor Script | |
| # ------------------------------------------ | |
| # This script performs three major tasks: | |
| # 1. Creates and initializes the Viper4Linux audio processing pipeline. | |
| # 2. Periodically monitors PipeWire routing and configuration changes. | |
| # 3. Automatically restores correct audio links if PipeWire breaks them. | |
| # | |
| # The script is intended to run from KDE autostart without opening a terminal. | |
| ############################################################################### | |
| # Short initial delay to allow PipeWire and PulseAudio compatibility layer to start. | |
| sleep 2 | |
| ############################################################################### | |
| # 1. Ensure the virtual sink "viper" exists | |
| ############################################################################### | |
| # Check if a sink named "viper" already exists. | |
| # If not, create a null-sink that will act as the input for ViperFX. | |
| if ! pactl list short sinks | grep -q "viper"; then | |
| pactl load-module module-null-sink \ | |
| sink_name=viper \ | |
| sink_properties=device.description="Viper4Linux" | |
| fi | |
| # Set the newly created sink as the default sink and source. | |
| # This reduces the chance of PipeWire auto-routing audio elsewhere. | |
| pactl set-default-sink viper | |
| pactl set-default-source viper.monitor | |
| ############################################################################### | |
| # 2. Wait until the monitor source appears | |
| ############################################################################### | |
| # PipeWire may take some time to register "viper.monitor". | |
| # We wait until it becomes available before launching the processing pipeline. | |
| while ! pactl list short sources | grep -q "viper.monitor"; do | |
| sleep 0.2 | |
| done | |
| ############################################################################### | |
| # 3. Kill any old gst-launch processes to avoid duplicates | |
| ############################################################################### | |
| killall -9 gst-launch-1.0 2>/dev/null | |
| ############################################################################### | |
| # 4. Load ViperFX parameters from config file | |
| ############################################################################### | |
| CONFIG_FILE="$HOME/.config/viper4linux/audio.conf" | |
| # If the config file exists, normalize whitespace and convert it into a single line. | |
| # Example: "vb-gain = 800" → "vb-gain=800" | |
| if [ -f "$CONFIG_FILE" ]; then | |
| VIPER_PARAMS=$(sed -e 's/[[:space:]]*=[[:space:]]*/=/g' "$CONFIG_FILE" | tr '\n' ' ') | |
| else | |
| # Fallback parameters if no config file is found. | |
| VIPER_PARAMS="fx-enable=true vb-enable=true vb-gain=800" | |
| fi | |
| ############################################################################### | |
| # 5. Start the audio processing pipeline | |
| ############################################################################### | |
| # Launch gst-launch in the background: | |
| # - pulsesrc reads from viper.monitor | |
| # - viperfx applies audio effects | |
| # - pulsesink outputs to the real hardware device | |
| gst-launch-1.0 \ | |
| pulsesrc device=viper.monitor ! \ | |
| viperfx $VIPER_PARAMS ! \ | |
| pulsesink device="alsa_output.pci-0000_00_1f.3.analog-stereo" & | |
| # Give gst-launch time to initialize its node in PipeWire. | |
| sleep 1 | |
| ############################################################################### | |
| # 6. Function to restore correct PipeWire links | |
| ############################################################################### | |
| restore_links() { | |
| # This function re-establishes the correct audio routing. | |
| # It is safe to call repeatedly; PipeWire will ignore duplicate links. | |
| pw-link viper.monitor:monitor_FL viperfx:input_FL | |
| pw-link viper.monitor:monitor_FR viperfx:input_FR | |
| pw-link viperfx:output_FL alsa_output.pci-0000_00_1f.3.analog-stereo:playback_FL | |
| pw-link viperfx:output_FR alsa_output.pci-0000_00_1f.3.analog-stereo:playback_FR | |
| } | |
| # Initial link restoration | |
| restore_links | |
| ############################################################################### | |
| # 7. Start the GUI | |
| ############################################################################### | |
| # Launch the Viper4Linux GUI in the background. | |
| viper4linux-gui & | |
| ############################################################################### | |
| # 8. Background monitoring loop | |
| ############################################################################### | |
| # This loop runs forever in the background and periodically checks: | |
| # - Whether gst-launch is still running. | |
| # - Whether the config file has changed. | |
| # - Whether PipeWire links are still correct. | |
| # - Whether viper.monitor still exists. | |
| # | |
| # If anything is wrong, the script automatically repairs it. | |
| ############################################################################### | |
| # Save initial config checksum to detect changes. | |
| LAST_CONF_HASH=$(md5sum "$CONFIG_FILE" 2>/dev/null | awk '{print $1}') | |
| ( | |
| while true; do | |
| ########################################################################### | |
| # Check if gst-launch is still running | |
| ########################################################################### | |
| if ! pgrep -x "gst-launch-1.0" >/dev/null; then | |
| # Restart the pipeline if it crashed or was killed. | |
| gst-launch-1.0 \ | |
| pulsesrc device=viper.monitor ! \ | |
| viperfx $VIPER_PARAMS ! \ | |
| pulsesink device="alsa_output.pci-0000_00_1f.3.analog-stereo" & | |
| sleep 1 | |
| restore_links | |
| fi | |
| ########################################################################### | |
| # Check if the config file has changed | |
| ########################################################################### | |
| CURRENT_HASH=$(md5sum "$CONFIG_FILE" 2>/dev/null | awk '{print $1}') | |
| if [ "$CURRENT_HASH" != "$LAST_CONF_HASH" ]; then | |
| # Reload parameters and restart gst-launch with new settings. | |
| LAST_CONF_HASH="$CURRENT_HASH" | |
| killall -9 gst-launch-1.0 2>/dev/null | |
| VIPER_PARAMS=$(sed -e 's/[[:space:]]*=[[:space:]]*/=/g' "$CONFIG_FILE" | tr '\n' ' ') | |
| gst-launch-1.0 \ | |
| pulsesrc device=viper.monitor ! \ | |
| viperfx $VIPER_PARAMS ! \ | |
| pulsesink device="alsa_output.pci-0000_00_1f.3.analog-stereo" & | |
| sleep 1 | |
| restore_links | |
| fi | |
| ########################################################################### | |
| # Check if PipeWire links are still correct | |
| ########################################################################### | |
| # If any link is missing, restore all links. | |
| if ! pw-link -l | grep -q "viper.monitor:monitor_FL.*viperfx:input_FL"; then restore_links; fi | |
| if ! pw-link -l | grep -q "viperfx:output_FL.*analog-stereo:playback_FL"; then restore_links; fi | |
| ########################################################################### | |
| # Check if viper.monitor still exists | |
| ########################################################################### | |
| if ! pactl list short sources | grep -q "viper.monitor"; then | |
| # Recreate the sink if PipeWire removed it. | |
| pactl load-module module-null-sink \ | |
| sink_name=viper \ | |
| sink_properties=device.description="Viper4Linux" | |
| pactl set-default-sink viper | |
| pactl set-default-source viper.monitor | |
| sleep 1 | |
| restore_links | |
| fi | |
| ########################################################################### | |
| # Sleep before next check | |
| ########################################################################### | |
| sleep 3 | |
| done | |
| ) & | |
| # End of script |
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