This is a small app that will allow me to switch the source of my monitors using DDC/CI from other devices.

⚠️: This is for personal use, so if you have any issues, you are on your own.

• The app will run inside a container and communicate with the host using a pipe-like approach.
• In the host, we'll have a bash script sending the commands to m1ddc.
• This won't work on windows.

First, you need to download and make m1ddc. That will generate a binary. After that, you need to put the bridge script and the built m1ddc binary in a directory that you'll later mount in the container:

mkdir -p /path/to/bridge
# Copy the m1ddc binary
cp /path/to/m1ddc /path/to/bridge
# Copy the bridge script
cp ./m1ddc-bridge.sh /path/to/bridge

Then, when you start the container (you can build the image with bun docker:build), you need to mount the bridge directory and define the env var with its path so the app can communicate using the pipe:

docker run -d \
  # Mount the bridge directory
  -v /path/to/bridge:/bridge \
  # Tell the app about the pipe file in it
  -e BRIDGE_PIPE_FILE=/bridge/m1ddc-bridge-pipe \
  ddc-switcher

Back in the host, you'll navigate to the bridge directory and start it:

cd /path/to/bridge;
./m1ddc-bridge.sh

The bridge will check the pipe file (every 1 second) for commands, execute them, and write the result back for the app to read.

While running the docker container and the bridge manually work, it's not very practical. In order to make this easier, you can use the ddc-switcher.sh script.

The script assumes a mount directory next to it that will contain the bridge script and the m1ddc binary. If you want to use it with a different path, just open the file and change the top variables, they are pretty easy to understand.

The structure should look something like this:

.
├── ddc-switcher.sh
└── mount
    ├── m1ddc
    └── m1ddc-bridge.sh

Then, you can just run the script:

./ddc-switcher.sh

The script will kill and remove any existing container with the same name, and any running bridge script. Then it will start everything again.

If you want to just stop the container and the bridge, you can run the script with the stop argument:

./ddc-switcher.sh stop

There are a few environment variables that can be set in order to change the app's behavior: