services:
  fm-receiver:
    build:
      context: .
      dockerfile: Dockerfile.gnuradio-audio

    # Root required for USB device access (RTL-SDR)
    user: root
    privileged: true

    volumes:
      # PulseAudio socket for audio output (ALSA → PulseAudio bridge)
      - /run/user/${HOST_UID:-1000}/pulse/native:/run/pulse/native
      # Flowgraph source files
      - ../examples:/flowgraphs:ro
      - ../src:/src:ro
      # Entrypoint script
      - ./entrypoint-fm.sh:/entrypoint-fm.sh:ro

    environment:
      - PULSE_SERVER=unix:/run/pulse/native
      - FREQ_MHZ=${FREQ_MHZ:-101.1}
      - GAIN=${GAIN:-10}

    # XML-RPC port for tuning control from host
    ports:
      - "8090:8090"

    entrypoint: ["/bin/bash", "/entrypoint-fm.sh"]

    stdin_open: true
    tty: true