Ryan Malloy
6c642f4a7e
New files for running the FM receiver in Docker with audio output: - Dockerfile.gnuradio-audio: GNU Radio image with ALSA→PulseAudio bridge - libasound2-plugins for ALSA PulseAudio plugin - /etc/asound.conf configures ALSA to route to PulseAudio - docker-compose.fm-receiver.yml: Full FM receiver setup - PulseAudio socket mount for audio - USB passthrough for RTL-SDR (requires privileged mode) - XML-RPC port 8090 exposed for tuning control - Environment vars: FREQ_MHZ, GAIN - entrypoint-fm.sh: Builds and runs flowgraph at specified frequency - run-fm-receiver.sh: Helper script with usage instructions Usage: HOST_UID=$(id -u) FREQ_MHZ=107.2 docker compose -f docker/docker-compose.fm-receiver.yml up
36 lines
1.0 KiB
Docker
36 lines
1.0 KiB
Docker
FROM librespace/gnuradio:latest
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# PulseAudio client + ALSA-PulseAudio plugin for audio output
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# GNU Radio uses ALSA backend, so we bridge ALSA → PulseAudio
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RUN apt-get update && apt-get install -y --no-install-recommends \
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pulseaudio-utils \
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libpulse0 \
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libasound2-plugins \
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alsa-utils \
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&& rm -rf /var/lib/apt/lists/*
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# Configure ALSA to use PulseAudio as default output
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# This makes any ALSA app (including GNU Radio) output to PulseAudio
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RUN echo 'pcm.!default { type pulse }' > /etc/asound.conf && \
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echo 'ctl.!default { type pulse }' >> /etc/asound.conf
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# Create non-root user for PulseAudio (matches typical host UID)
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ARG USER_ID=1000
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ARG GROUP_ID=1000
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RUN groupadd -g ${GROUP_ID} gnuradio || true \
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&& useradd -m -u ${USER_ID} -g ${GROUP_ID} gnuradio || true
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WORKDIR /flowgraphs
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# PulseAudio socket location
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ENV PULSE_SERVER=unix:/run/pulse/native
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# XML-RPC port for runtime control
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ENV XMLRPC_PORT=8090
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EXPOSE 8090
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USER gnuradio
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# Default: run a flowgraph passed as argument
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ENTRYPOINT ["python3"]
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