Fix microphone capture in DirectAudio games (#747)

app/src/main/java/com/droiddeck/launcher/session/SessionService.kt

@@ -560,6 +560,8 @@ class SessionService : Service() {
             SessionPrefs.directAudio(this)
         val wantsMic = SessionPrefs.micEnabled(this) &&
             checkSelfPermission(android.Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED
+        guest.add("BL_MIC_ENABLED=" + if (wantsMic) "1" else "0")
+        guest.add("BANNER_AUDIO_DIRECT_MIC=" + if (wantsMic) "1" else "0")
         val audioDir = File(filesDir, "directaudio").apply { mkdirs() }
         val relaySocket = File(audioDir, "relay.sock")
         val micFifo = if (wantsMic) File(audioDir, "mic.fifo") else null

tools/linuxfs/overlay/usr/local/bin/droiddeck-game-env

@@ -300,6 +300,7 @@ def main():
     if not command:
         return 2
     env = os.environ.copy()
+    mic_enabled = env.get("BL_MIC_ENABLED")
     mark_install_scripts(command, env)
     app_id = game_id(env)
     if app_id:
@@ -328,6 +329,8 @@ def main():
                 env = apply_config(env, {"version": 1}, app_id, fixes)
         except (OSError, ValueError, TypeError, AttributeError):
             print("droiddeck-game-env: invalid configuration; using inherited environment", file=sys.stderr)
+    if mic_enabled == "0":
+        env["BANNER_AUDIO_DIRECT_MIC"] = "0"
     env = force_ssbs(command, env)
     command, env = start_without_steam(command, env, app_id)
     sync = load_sync()

tools/tests/test_game_environment.py

@@ -43,6 +43,27 @@ class ReadConfigMappingTest(unittest.TestCase):
 
 
 class GameEnvironmentTest(unittest.TestCase):
+    def test_directaudio_capture_follows_the_session_microphone_setting(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            home = Path(tmp)
+            probe = home / "probe"
+            probe.write_text("#!" + sys.executable + "\nimport os\nprint(os.environ.get('BANNER_AUDIO_DIRECT_MIC', 'unset'))\n")
+            probe.chmod(0o755)
+            config = home / ".config/droiddeck/game-environment.json"
+            config.parent.mkdir(parents=True)
+            for enabled, override, expected in (("1", None, "1"), ("0", "1", "0"), ("1", "0", "0")):
+                with self.subTest(enabled=enabled, override=override):
+                    profile = {} if override is None else {
+                        "BANNER_AUDIO_DIRECT_MIC": override, "BL_MIC_ENABLED": override,
+                    }
+                    config.write_text(json.dumps({"version": 1, "games": {"42": profile}}))
+                    env = dict(os.environ, HOME=tmp, BL_MIC_ENABLED=enabled,
+                               BANNER_AUDIO_DIRECT_MIC="1", STEAM_COMPAT_DATA_PATH="/compatdata/42")
+                    result = subprocess.run([sys.executable, str(BIN / "droiddeck-game-env"),
+                                             str(probe), "waitforexitandrun"],
+                                            env=env, text=True, capture_output=True, check=True)
+                    self.assertEqual(result.stdout.strip(), expected)
+
     def test_the_install_script_evaluator_gets_its_scripts_marked_first(self):
         with tempfile.TemporaryDirectory() as tmp:
             root = Path(tmp)