Fix navigation audio capture via AudioPolicy loopback; remove local-mute setting

NOTICE

@@ -39,8 +39,14 @@ Kotlin Standard Library / Kotlin Coroutines
 Acknowledgements
 
 Some privileged-mode techniques used by this project were inspired by the
-approach taken in scrcpy (https://github.com/Genymobile/scrcpy, Apache-2.0).
-No source code from scrcpy is included.
+approach taken in scrcpy (https://github.com/Genymobile/scrcpy, Apache-2.0),
+specifically:
+  - Physical display panel on/off via SurfaceControl for screen-off mirroring
+  - The fillAppInfo / FakeContext pattern for spoofing AttributionSource when
+    capturing system audio from a shell-UID service
+
+No source code from scrcpy is included; Castla reimplements these approaches
+for its own architecture.
 
 ================================================================================
 Test-only dependencies (not distributed in release APK)

README.de.md

@@ -94,7 +94,12 @@ Castla baut auf großartigen Open-Source-Projekten auf:
 - [AndroidX / Jetpack Compose](https://developer.android.com/jetpack) — modernes Android-UI-Toolkit
 - [Kotlin Coroutines](https://github.com/Kotlin/kotlinx.coroutines) — asynchrone Streaming-Pipeline
 
-Einige Techniken des privilegierten Modus wurden von [scrcpy](https://github.com/Genymobile/scrcpy) inspiriert. Es ist kein scrcpy-Quellcode enthalten.
+Einige Techniken des privilegierten Modus wurden von [scrcpy](https://github.com/Genymobile/scrcpy) (Apache-2.0) inspiriert, insbesondere:
+
+- Physisches Ein-/Ausschalten des Displays über `SurfaceControl` für Bildschirm-aus-Mirroring
+- Das `fillAppInfo` / `FakeContext`-Muster zum Spoofing der `AttributionSource` beim Erfassen von System-Audio aus einem Shell-UID-Dienst
+
+Es ist kein scrcpy-Quellcode enthalten — Castla implementiert diese Ansätze eigenständig.
 
 Siehe [NOTICE](NOTICE) für die vollständige Liste der Drittanbieter-Attributionen.
 

README.es.md

@@ -94,7 +94,12 @@ Castla se apoya en el trabajo de grandes proyectos de código abierto:
 - [AndroidX / Jetpack Compose](https://developer.android.com/jetpack) — toolkit moderno de UI para Android
 - [Kotlin Coroutines](https://github.com/Kotlin/kotlinx.coroutines) — pipeline de streaming asíncrono
 
-Algunas técnicas del modo privilegiado se inspiraron en [scrcpy](https://github.com/Genymobile/scrcpy). No se incluye código fuente de scrcpy.
+Algunas técnicas del modo privilegiado se inspiraron en [scrcpy](https://github.com/Genymobile/scrcpy) (Apache-2.0), en concreto:
+
+- Encendido/apagado del panel físico de la pantalla mediante `SurfaceControl` para el mirroring con pantalla apagada
+- El patrón `fillAppInfo` / `FakeContext` para falsificar `AttributionSource` al capturar audio del sistema desde un servicio con UID shell
+
+No se incluye código fuente de scrcpy — Castla reimplementa estos enfoques en su propia arquitectura.
 
 Consulta [NOTICE](NOTICE) para la lista completa de atribuciones de terceros.
 

README.fr.md

@@ -94,7 +94,12 @@ Castla s'appuie sur d'excellents projets open source :
 - [AndroidX / Jetpack Compose](https://developer.android.com/jetpack) — boîte à outils UI Android moderne
 - [Kotlin Coroutines](https://github.com/Kotlin/kotlinx.coroutines) — pipeline de streaming asynchrone
 
-Certaines techniques du mode privilégié s'inspirent de [scrcpy](https://github.com/Genymobile/scrcpy). Aucun code source de scrcpy n'est inclus.
+Certaines techniques du mode privilégié s'inspirent de [scrcpy](https://github.com/Genymobile/scrcpy) (Apache-2.0), en particulier :
+
+- L'allumage/extinction physique du panneau d'affichage via `SurfaceControl` pour le mirroring écran éteint
+- Le motif `fillAppInfo` / `FakeContext` pour usurper `AttributionSource` lors de la capture audio système depuis un service en UID shell
+
+Aucun code source de scrcpy n'est inclus — Castla réimplémente ces approches pour sa propre architecture.
 
 Voir [NOTICE](NOTICE) pour la liste complète des attributions tierces.
 

README.ja.md

@@ -94,7 +94,12 @@ Castla は素晴らしいオープンソースプロジェクトの上に成り
 - [AndroidX / Jetpack Compose](https://developer.android.com/jetpack) — モダンな Android UI ツールキット
 - [Kotlin Coroutines](https://github.com/Kotlin/kotlinx.coroutines) — 非同期ストリーミングパイプライン
 
-一部の特権モード手法は [scrcpy](https://github.com/Genymobile/scrcpy) のアプローチから着想を得ています。scrcpy のソースコードは含まれていません。
+一部の特権モード手法は [scrcpy](https://github.com/Genymobile/scrcpy) (Apache-2.0) のアプローチから着想を得ています。具体的には次のとおりです:
+
+- 画面オフミラーリング時の `SurfaceControl` による物理ディスプレイパネルの電源制御
+- shell UID のサービスからシステム音声をキャプチャする際に `AttributionSource` を偽装するための `fillAppInfo` / `FakeContext` パターン
+
+scrcpy のソースコードは含まれておらず、Castla は自身のアーキテクチャに合わせてこれらの手法を再実装しています。
 
 サードパーティの完全な表記については [NOTICE](NOTICE) を参照してください。
 

README.ko.md

@@ -110,7 +110,12 @@ Castla는 훌륭한 오픈소스 프로젝트들의 도움으로 만들어졌습
 - [AndroidX / Jetpack Compose](https://developer.android.com/jetpack) — 현대적 Android UI 툴킷
 - [Kotlin Coroutines](https://github.com/Kotlin/kotlinx.coroutines) — 비동기 스트리밍 파이프라인
 
-일부 특권 모드 기법은 [scrcpy](https://github.com/Genymobile/scrcpy)의 접근 방식에서 영감을 받았습니다. scrcpy의 소스 코드는 포함되어 있지 않습니다.
+일부 특권 모드 기법은 [scrcpy](https://github.com/Genymobile/scrcpy) (Apache-2.0)의 접근 방식에서 영감을 받았으며, 구체적으로 다음과 같습니다:
+
+- 화면 꺼짐 미러링을 위한 `SurfaceControl` 기반 디스플레이 패널 전원 제어
+- shell UID 서비스에서 시스템 오디오를 캡처할 때 `AttributionSource`를 스푸핑하기 위한 `fillAppInfo` / `FakeContext` 패턴
+
+scrcpy의 소스 코드는 포함되어 있지 않으며, Castla는 자체 아키텍처에 맞게 위 접근 방식을 재구현했습니다.
 
 전체 서드파티 고지는 [NOTICE](NOTICE) 파일을 참조하세요.
 

README.md

@@ -147,7 +147,12 @@ Castla stands on the shoulders of great open-source projects:
 - [AndroidX / Jetpack Compose](https://developer.android.com/jetpack) — modern Android UI toolkit
 - [Kotlin Coroutines](https://github.com/Kotlin/kotlinx.coroutines) — async streaming pipeline
 
-Some privileged-mode techniques were inspired by [scrcpy](https://github.com/Genymobile/scrcpy). No scrcpy source code is included.
+Some privileged-mode techniques were inspired by [scrcpy](https://github.com/Genymobile/scrcpy) (Apache-2.0), specifically:
+
+- Physical display panel on/off via `SurfaceControl` for screen-off mirroring
+- The `fillAppInfo` / `FakeContext` pattern for spoofing `AttributionSource` when capturing system audio from a shell-UID service
+
+No scrcpy source code is included — Castla reimplements these approaches for its own architecture.
 
 See [NOTICE](NOTICE) for the full list of third-party attributions.
 

README.zh-CN.md

@@ -94,7 +94,12 @@ Castla 建立在出色的开源项目之上：
 - [AndroidX / Jetpack Compose](https://developer.android.com/jetpack) — 现代 Android UI 工具包
 - [Kotlin Coroutines](https://github.com/Kotlin/kotlinx.coroutines) — 异步流式管道
 
-部分特权模式技术受 [scrcpy](https://github.com/Genymobile/scrcpy) 启发。本项目未包含 scrcpy 源代码。
+部分特权模式技术受 [scrcpy](https://github.com/Genymobile/scrcpy) (Apache-2.0) 启发，具体包括：
+
+- 通过 `SurfaceControl` 控制物理显示面板电源以实现息屏镜像
+- 使用 `fillAppInfo` / `FakeContext` 模式在 shell UID 服务中伪造 `AttributionSource` 以捕获系统音频
+
+本项目未包含 scrcpy 源代码 — Castla 基于自身架构重新实现了上述方案。
 
 完整的第三方归属列表请参见 [NOTICE](NOTICE)。
 

app/src/main/java/com/castla/mirror/MainActivity.kt

@@ -1211,7 +1211,6 @@ class MainActivity : AppCompatActivity() {
                 if (streamSettings.isAutoResolution) 0 else streamSettings.maxResolution.maxHeight)
             putExtra(MirrorForegroundService.EXTRA_FPS, streamSettings.fps) // FPS_AUTO is already 0
             putExtra(MirrorForegroundService.EXTRA_AUDIO, streamSettings.audioEnabled)
-            putExtra(MirrorForegroundService.EXTRA_MUTE_LOCAL_AUDIO, streamSettings.muteLocalAudio)
             putExtra(MirrorForegroundService.EXTRA_MIRRORING_MODE, streamSettings.mirroringMode.name)
             putExtra(MirrorForegroundService.EXTRA_TARGET_PACKAGE, streamSettings.targetAppPackage)
         }

app/src/main/java/com/castla/mirror/policy/AudioPolicy.kt

@@ -8,7 +8,6 @@ data class AudioPolicyInput(
     val requestedCodec: String?,
     val currentCodec: String?,
     val browserConnected: Boolean,
-    val muteLocalAudio: Boolean,
     val captureActive: Boolean
 )
 
@@ -18,26 +17,20 @@ data class AudioPolicyInput(
 data class AudioPolicyDecision(
     val shouldCapture: Boolean,
     val codecMode: String?,
-    val shouldMuteLocal: Boolean,
     val restartRequired: Boolean
 )
 
 /**
  * Pure policy object that determines audio capture behavior.
  *
- * Separates two independent concerns:
- * - "Capture audio for streaming" (controlled by audioEnabled + browserConnected)
- * - "Mute local phone audio" (controlled by muteLocalAudio, only when capturing)
- *
- * This ensures music apps and video apps follow the same audio policy,
- * and that the audio-off setting cannot be bypassed by codec requests.
+ * Capture is gated by audioEnabled + browserConnected. The audio-off setting
+ * cannot be bypassed by codec requests.
  */
 object AudioPolicy {
 
     fun evaluate(input: AudioPolicyInput): AudioPolicyDecision {
         val shouldCapture = input.audioEnabled && input.browserConnected
         val codecMode = if (shouldCapture) (input.requestedCodec ?: input.currentCodec) else null
-        val shouldMuteLocal = shouldCapture && input.muteLocalAudio
         // null currentCodec means default start (opus). Treat "opus" request against null as same-path.
         val effectiveCurrent = input.currentCodec ?: "opus"
         val codecChanged = input.requestedCodec != null && input.requestedCodec != effectiveCurrent
@@ -46,7 +39,6 @@ object AudioPolicy {
         return AudioPolicyDecision(
             shouldCapture = shouldCapture,
             codecMode = codecMode,
-            shouldMuteLocal = shouldMuteLocal,
             restartRequired = restartRequired
         )
     }

app/src/main/java/com/castla/mirror/service/AudioCaptureOrchestrator.kt

@@ -18,15 +18,13 @@ class AudioCaptureOrchestrator(private val actions: Actions) {
     interface Actions {
         fun startCapture(codec: String?)
         fun stopCapture()
-        fun applyMute(shouldMute: Boolean)
         fun grantAudioPermission()
         /** Schedule a callback to [onDeferredTimerExpired] after [delayMs]. Return a cancel handle. */
         fun scheduleDeferredStart(delayMs: Long): Any?
         fun cancelDeferredStart(handle: Any?)
     }
 
     var audioEnabled = false
-    var muteLocalAudio = false
     var browserConnected = false
     var currentCodec: String? = null
     var captureActive = false
@@ -57,14 +55,12 @@ class AudioCaptureOrchestrator(private val actions: Actions) {
             if (captureActive) {
                 actions.stopCapture()
                 captureActive = false
-                actions.applyMute(false)
             }
             return EnsureResult.STOPPED
         }
 
         // Already capturing, no restart needed
         if (captureActive && !decision.restartRequired) {
-            actions.applyMute(decision.shouldMuteLocal)
             return EnsureResult.KEPT
         }
 
@@ -115,7 +111,6 @@ class AudioCaptureOrchestrator(private val actions: Actions) {
         }
         currentCodec = null
         audioSocketConnected = false
-        actions.applyMute(false)
     }
 
     private fun cancelDefer() {
@@ -131,7 +126,6 @@ class AudioCaptureOrchestrator(private val actions: Actions) {
         requestedCodec = codecOverride,
         currentCodec = currentCodec,
         browserConnected = browserConnected,
-        muteLocalAudio = muteLocalAudio,
         captureActive = captureActive
     ))
 
@@ -142,19 +136,16 @@ class AudioCaptureOrchestrator(private val actions: Actions) {
         if (!decision.shouldCapture) return EnsureResult.STOPPED
 
         if (captureActive && !decision.restartRequired) {
-            actions.applyMute(decision.shouldMuteLocal)
             return EnsureResult.KEPT
         }
 
         // Stop existing if restarting
         if (captureActive) {
             actions.stopCapture()
             captureActive = false
-            actions.applyMute(false)
         }
 
         actions.grantAudioPermission()
-        actions.applyMute(decision.shouldMuteLocal)
 
         if (codecOverride != null) currentCodec = codecOverride
 

app/src/main/java/com/castla/mirror/service/MirrorForegroundService.kt

@@ -13,7 +13,6 @@ import android.content.Intent
 import android.content.pm.PackageManager
 import android.content.pm.ServiceInfo
 import android.hardware.display.DisplayManager
-import android.media.AudioManager
 import android.net.wifi.WifiManager
 import android.os.Build
 import android.os.Binder
@@ -78,7 +77,6 @@ class MirrorForegroundService : Service() {
         const val EXTRA_MAX_RESOLUTION = "max_resolution"
         const val EXTRA_FPS = "fps"
         const val EXTRA_AUDIO = "audio_enabled"
-        const val EXTRA_MUTE_LOCAL_AUDIO = "mute_local_audio"
         const val EXTRA_MIRRORING_MODE = "mirroring_mode"
         const val EXTRA_TARGET_PACKAGE = "target_package"
 
@@ -172,7 +170,6 @@ class MirrorForegroundService : Service() {
     private var secondaryRequestedHeight: Int = 0
     @Volatile private var currentCodecMode: String = "h264"
     private val pipelineMutex = Mutex()
-    private var savedMediaVolume: Int = -1
     private val mainHandler = Handler(Looper.getMainLooper())
     private var splitPresentation: SplitWebPresentation? = null
     private var singleVdSplit: Boolean = false
@@ -214,7 +211,6 @@ class MirrorForegroundService : Service() {
 
     // Deferred pipeline state: heavy capture/encoding starts only when browser connects
     private var pendingAudioEnabled = false
-    private var pendingMuteLocalAudio = false
     private var deferredAudioStartJob: Job? = null
 
     private var thermalListener: PowerManager.OnThermalStatusChangedListener? = null
@@ -619,11 +615,10 @@ class MirrorForegroundService : Service() {
 
         Log.i(TAG, "Mode: autoRes=$autoResolution autoFps=$autoFps initialMaxHeight=$currentMaxHeight initialFps=$settingsFps")
         val audioEnabled = intent.getBooleanExtra(EXTRA_AUDIO, false)
-        val muteLocalAudio = intent.getBooleanExtra(EXTRA_MUTE_LOCAL_AUDIO, false)
         mirroringMode = intent.getStringExtra(EXTRA_MIRRORING_MODE) ?: "FULL_SCREEN"
         targetPackage = intent.getStringExtra(EXTRA_TARGET_PACKAGE) ?: ""
 
-        startPipeline(resultCode, data, settingsFps, audioEnabled, muteLocalAudio)
+        startPipeline(resultCode, data, settingsFps, audioEnabled)
 
         return START_NOT_STICKY
     }
@@ -944,8 +939,7 @@ class MirrorForegroundService : Service() {
         resultCode: Int,
         data: Intent,
         fps: Int,
-        audioEnabled: Boolean,
-        muteLocalAudio: Boolean = false
+        audioEnabled: Boolean
     ) {
         try {
             MirrorDiagnostics.onSessionStart()
@@ -975,7 +969,6 @@ class MirrorForegroundService : Service() {
             currentHeight = height
             currentFps = fps
             pendingAudioEnabled = audioEnabled
-            pendingMuteLocalAudio = muteLocalAudio
 
             audioOrchestrator = AudioCaptureOrchestrator(object : AudioCaptureOrchestrator.Actions {
                 override fun startCapture(codec: String?) {
@@ -996,9 +989,6 @@ class MirrorForegroundService : Service() {
                     try { audioCapture?.stop() } catch (_: Exception) {}
                     audioCapture = null
                 }
-                override fun applyMute(shouldMute: Boolean) {
-                    if (shouldMute) muteMediaVolume() else restoreMediaVolume()
-                }
                 override fun grantAudioPermission() {
                     tryGrantAudioCapturePermission()
                 }
@@ -2515,7 +2505,6 @@ class MirrorForegroundService : Service() {
     private fun ensureAudioCaptureState(codecOverride: String? = null) {
         val orch = audioOrchestrator ?: return
         orch.audioEnabled = pendingAudioEnabled && AudioCapture.isSupported()
-        orch.muteLocalAudio = pendingMuteLocalAudio
         orch.browserConnected = browserConnected
         orch.ensure(codecOverride)
     }
@@ -3073,79 +3062,6 @@ class MirrorForegroundService : Service() {
         }
     }
 
-    // Saved volumes for all streams we mute (stream type -> saved volume)
-    private val savedVolumes = mutableMapOf<Int, Int>()
-
-    private fun muteMediaVolume() {
-        try {
-            val am = getSystemService(Context.AUDIO_SERVICE) as AudioManager
-            // Mute all streams that could carry navigation/media/notification audio
-            val streamsToMute = intArrayOf(
-                AudioManager.STREAM_MUSIC,        // 3 - media, also navigation on most devices
-                AudioManager.STREAM_NOTIFICATION,  // 5 - notifications
-                AudioManager.STREAM_SYSTEM,        // 1 - system sounds
-                AudioManager.STREAM_DTMF,          // 8 - DTMF tones
-            )
-            for (stream in streamsToMute) {
-                try {
-                    val current = am.getStreamVolume(stream)
-                    if (current > 0) {
-                        savedVolumes[stream] = current
-                        am.setStreamVolume(stream, 0, 0)
-                    }
-                } catch (_: Exception) {}
-            }
-            // Legacy compat
-            savedMediaVolume = savedVolumes[AudioManager.STREAM_MUSIC] ?: -1
-
-            // Use Shizuku to force-mute via shell — catches navigation guidance audio
-            // that bypasses normal stream volume controls
-            try {
-                val setup = shizukuSetup
-                val service = setup?.privilegedService
-                if (setup != null && service != null && setup.isAvailable() && setup.hasPermission()) {
-                    for (stream in streamsToMute) {
-                        service.execCommand("media volume --show --stream $stream --set 0")
-                    }
-                    Log.i(TAG, "Shizuku force-muted all audio streams")
-                } else {
-                    Log.i(TAG, "Skipping Shizuku mute: privileged service not connected")
-                }
-            } catch (e: Exception) {
-                Log.w(TAG, "Shizuku stream mute failed", e)
-            }
-        } catch (e: Exception) {
-            Log.e(TAG, "muteMediaVolume failed", e)
-        }
-    }
-
-    private fun restoreMediaVolume() {
-        try {
-            val am = getSystemService(Context.AUDIO_SERVICE) as AudioManager
-            for ((stream, volume) in savedVolumes) {
-                try {
-                    am.setStreamVolume(stream, volume, 0)
-                } catch (_: Exception) {}
-            }
-
-            // Also restore via Shizuku
-            try {
-                val setup = shizukuSetup
-                val service = setup?.privilegedService
-                if (setup != null && service != null && setup.isAvailable() && setup.hasPermission()) {
-                    for ((stream, volume) in savedVolumes) {
-                        service.execCommand("media volume --show --stream $stream --set $volume")
-                    }
-                }
-            } catch (_: Exception) {}
-
-            savedVolumes.clear()
-            savedMediaVolume = -1
-        } catch (e: Exception) {
-            Log.e(TAG, "restoreMediaVolume failed", e)
-        }
-    }
-
     private fun createNotificationChannel() {
         val channel = NotificationChannel(
             CHANNEL_ID, "Mirror Service", NotificationManager.IMPORTANCE_LOW