1 files changed, 91 insertions, 0 deletions
diff --git a/bin/sound_node.py b/bin/sound_node.py
new file mode 100755
index 0000000..90e6997
--- /dev/null
+++ b/bin/sound_node.py
@@ -0,0 +1,91 @@
+#!/usr/bin/env python3
+import os
+import __py_include
+
+from typing import Optional
+
+from homekit.config import config
+from homekit.audio import amixer
+from homekit.media import MediaNodeServer, SoundRecordStorage, SoundRecorder
+from homekit import http
+
+
+# This script must be run as root as it runs arecord.
+# Implements HTTP API for amixer and arecord.
+# -------------------------------------------
+
+def _amixer_control_response(control):
+    info = amixer.get(control)
+    caps = amixer.get_caps(control)
+    return http.ok({
+        'caps': caps,
+        'info': info
+    })
+
+
+class SoundNodeServer(MediaNodeServer):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self.get('/amixer/get-all/', self.amixer_get_all)
+        self.get('/amixer/get/{control}/', self.amixer_get)
+        self.get('/amixer/{op:mute|unmute|cap|nocap}/{control}/', self.amixer_set)
+        self.get('/amixer/{op:incr|decr}/{control}/', self.amixer_volume)
+
+    async def amixer_get_all(self, request: http.Request):
+        controls_info = amixer.get_all()
+        return self.ok(controls_info)
+
+    async def amixer_get(self, request: http.Request):
+        control = request.match_info['control']
+        if not amixer.has_control(control):
+            raise ValueError(f'invalid control: {control}')
+
+        return _amixer_control_response(control)
+
+    async def amixer_set(self, request: http.Request):
+        op = request.match_info['op']
+        control = request.match_info['control']
+        if not amixer.has_control(control):
+            raise ValueError(f'invalid control: {control}')
+
+        f = getattr(amixer, op)
+        f(control)
+
+        return _amixer_control_response(control)
+
+    async def amixer_volume(self, request: http.Request):
+        op = request.match_info['op']
+        control = request.match_info['control']
+        if not amixer.has_control(control):
+            raise ValueError(f'invalid control: {control}')
+
+        def get_step() -> Optional[int]:
+            if 'step' in request.query:
+                step = int(request.query['step'])
+                if not 1 <= step <= 50:
+                    raise ValueError('invalid step value')
+                return step
+            return None
+
+        f = getattr(amixer, op)
+        f(control, step=get_step())
+
+        return _amixer_control_response(control)
+
+
+if __name__ == '__main__':
+    if not os.getegid() == 0:
+        raise RuntimeError("Must be run as root.")
+
+    config.load_app('sound_node')
+
+    storage = SoundRecordStorage(config['node']['storage'])
+
+    recorder = SoundRecorder(storage=storage)
+    recorder.start_thread()
+
+    server = SoundNodeServer(recorder=recorder,
+                             storage=storage,
+                             addr=config.get_addr('node.listen'))
+    server.run()