things

pi/bin/audio-forward-listener.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+set -euo pipefail
+set +H
+
+ENV_FILE="${VIDEO_ENV_FILE:-/var/lib/roverd/video.env}"
+
+if [[ ! -f "$ENV_FILE" ]]; then
+  echo "Environment file ${ENV_FILE} missing; cannot start audio forward listener" >&2
+  exit 1
+fi
+
+# shellcheck disable=SC1090
+source "$ENV_FILE"
+
+: "${AUDIO_FORWARD_URL:?AUDIO_FORWARD_URL not set in ${ENV_FILE}}"
+PLAYBACK_DEVICE="${AUDIO_PLAYBACK_DEVICE:-default}"
+
+if [[ -n "${FFMPEG_BIN:-}" ]]; then
+  FFMPEG_BIN_PATH="$FFMPEG_BIN"
+elif command -v ffmpeg >/dev/null 2>&1; then
+  FFMPEG_BIN_PATH="$(command -v ffmpeg)"
+else
+  echo "ffmpeg not found; install it via apt install ffmpeg." >&2
+  exit 1
+fi
+
+if command -v aplay >/dev/null 2>&1; then
+  APLAY_BIN_PATH="$(command -v aplay)"
+else
+  echo "aplay not found; install it via apt install alsa-utils." >&2
+  exit 1
+fi
+
+run_pipeline() {
+  "${FFMPEG_BIN_PATH}" \
+    -hide_banner \
+    -loglevel warning \
+    -fflags nobuffer \
+    -flags low_delay \
+    -analyzeduration 0 \
+    -probesize 32 \
+    -i "${AUDIO_FORWARD_URL}" \
+    -vn \
+    -ac 1 \
+    -ar 16000 \
+    -f s16le \
+    pipe:1 \
+    | "${APLAY_BIN_PATH}" \
+      -q \
+      -D "${PLAYBACK_DEVICE}" \
+      -f S16_LE \
+      -r 16000 \
+      -c 1
+}
+
+trap 'kill 0 2>/dev/null' EXIT INT TERM
+
+while true; do
+  if run_pipeline; then
+    exit 0
+  fi
+  echo "Audio forward listener exited ffmpeg=${PIPESTATUS[0]} aplay=${PIPESTATUS[1]}, restarting in 2s..." >&2
+  sleep 2
+done