From fb86d7993033bee5dc90d35110076044914a876b Mon Sep 17 00:00:00 2001
From: Logan <Logan@simplestepsolutions.com>
Date: Sat, 11 Apr 2026 21:16:32 -0400
Subject: [PATCH] =?UTF-8?q?File=09Change=20op25-container/system.pa=09New?=
 =?UTF-8?q?=20PulseAudio=20config:=20auth-anonymous=3D1=20so=20the=20edge-?=
 =?UTF-8?q?node=20can=20connect=20without=20group=20membership=20op25-cont?=
 =?UTF-8?q?ainer/Dockerfile=09Copies=20system.pa=20into=20/etc/pulse/syste?=
 =?UTF-8?q?m.pa=20drb-edge-node/Dockerfile=09Added=20libpulse0=20=E2=80=94?=
 =?UTF-8?q?=20ffmpeg=20needs=20this=20runtime=20library=20to=20use=20-f=20?=
 =?UTF-8?q?pulse=20drb-edge-node/app/internal/call=5Frecorder.py=09Switche?=
 =?UTF-8?q?d=20recording=20from=20Icecast=20(burst-buffer=20overlap)=20to?=
 =?UTF-8?q?=20PulseAudio=20monitor=20(zero-delay,=20exact=20call=20boundar?=
 =?UTF-8?q?ies)?=
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 drb-edge-node/Dockerfile                    |  1 +
 drb-edge-node/app/internal/call_recorder.py | 12 +++++++-----
 op25-container/Dockerfile                   |  5 ++++-
 op25-container/system.pa                    | 16 ++++++++++++++++
 4 files changed, 28 insertions(+), 6 deletions(-)
 create mode 100644 op25-container/system.pa

diff --git a/drb-edge-node/Dockerfile b/drb-edge-node/Dockerfile
index bb77fe6..dc1754e 100644
--- a/drb-edge-node/Dockerfile
+++ b/drb-edge-node/Dockerfile
@@ -4,6 +4,7 @@ RUN apt-get update && apt-get install -y \
     ffmpeg \
     libopus0 \
     libopus-dev \
+    libpulse0 \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
diff --git a/drb-edge-node/app/internal/call_recorder.py b/drb-edge-node/app/internal/call_recorder.py
index 9c55bb6..9c6cb55 100644
--- a/drb-edge-node/app/internal/call_recorder.py
+++ b/drb-edge-node/app/internal/call_recorder.py
@@ -15,9 +15,6 @@ class CallRecorder:
         self._process: Optional[asyncio.subprocess.Process] = None
         self._current_call_id: Optional[str] = None
         self._current_file: Optional[Path] = None
-        self._icecast_url = (
-            f"http://{settings.icecast_host}:{settings.icecast_port}{settings.icecast_mount}"
-        )
         self._recordings_dir = Path(settings.recordings_path)
 
     async def start_recording(self, call_id: str) -> bool:
@@ -30,10 +27,15 @@ class CallRecorder:
         self._current_file = self._recordings_dir / f"{ts}_{call_id}.mp3"
         self._current_call_id = call_id
 
+        # Read directly from the PulseAudio monitor source (zero-delay, no Icecast burst buffer).
+        # PULSE_SERVER env var is set in the container environment.
         cmd = [
             "ffmpeg", "-y",
-            "-i", self._icecast_url,
-            "-acodec", "copy",
+            "-f", "pulse",
+            "-i", "default.monitor",
+            "-acodec", "libmp3lame",
+            "-ar", "22050",
+            "-b:a", "32k",
             "-t", str(MAX_RECORDING_SECONDS),
             str(self._current_file),
         ]
diff --git a/op25-container/Dockerfile b/op25-container/Dockerfile
index bdebcea..59e0a23 100644
--- a/op25-container/Dockerfile
+++ b/op25-container/Dockerfile
@@ -6,9 +6,12 @@ ENV DEBIAN_FRONTEND=noninteractive
 
 # Install system dependencies
 RUN apt-get update && \
-    apt-get upgrade -y && \ 
+    apt-get upgrade -y && \
     apt-get install git pulseaudio pulseaudio-utils liquidsoap -y
 
+# Install custom PulseAudio system config (enables anonymous access for edge-node)
+COPY system.pa /etc/pulse/system.pa
+
 # Clone the boatbod op25 repository
 RUN git clone -b gr310 https://github.com/boatbod/op25 /op25
 
diff --git a/op25-container/system.pa b/op25-container/system.pa
new file mode 100644
index 0000000..e45789f
--- /dev/null
+++ b/op25-container/system.pa
@@ -0,0 +1,16 @@
+# PulseAudio system daemon configuration for DRB containers.
+# Allows anonymous connections so the edge-node container can read the audio monitor.
+
+.nofail
+
+# Native protocol with anonymous auth — required for inter-container access
+load-module module-native-protocol-unix socket=/run/pulse/native auth-anonymous=1
+
+# Always provide a default sink even without audio hardware
+load-module module-always-sink
+
+# Restore device/stream settings across restarts
+load-module module-device-restore
+load-module module-stream-restore
+
+.fail