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aosp-native-services-and-media

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Actualizado23 de junio de 2026 a las 16:04

AOSP Part IV — Native Services & Media. Use when reasoning about surfaceflinger, audioserver, mediaserver, cameraserver, the graphics pipeline (BufferQueue, GraphicBuffer, OpenGL ES / Vulkan / Skia / HWUI, RenderThread, layer composition), the animation system (Choreographer, ValueAnimator, RenderNode animations, dynamic spring/fling), the audio stack (AudioFlinger, AudioPolicyManager, AAudio, OpenSL ES, Spatializer), the media pipeline (MediaCodec, MediaExtractor, NuPlayer, codec2 HAL), or the sensor stack (SensorService, sensor HAL, batching, wake-up sensors). Chapters 12–17.

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aospbooks

aospbooks/aosp-internal-book

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Ocupaciones relacionadasSOC

Basado en la clasificación ocupacional SOC

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SKILL.md

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name	aosp-native-services-and-media
description	AOSP Part IV — Native Services & Media. Use when reasoning about surfaceflinger, audioserver, mediaserver, cameraserver, the graphics pipeline (BufferQueue, GraphicBuffer, OpenGL ES / Vulkan / Skia / HWUI, RenderThread, layer composition), the animation system (Choreographer, ValueAnimator, RenderNode animations, dynamic spring/fling), the audio stack (AudioFlinger, AudioPolicyManager, AAudio, OpenSL ES, Spatializer), the media pipeline (MediaCodec, MediaExtractor, NuPlayer, codec2 HAL), or the sensor stack (SensorService, sensor HAL, batching, wake-up sensors). Chapters 12–17.
metadata	{"author":"utzcoz","version":"2026.06.24","last-updated":"2026-06-24"}

AOSP Part IV — Native Services & Media

The native daemons that run continuously and own audio, video, sensors, and the graphics composition pipeline.

Chapters in this Part

12-native-services.md — surfaceflinger, audioserver, mediaserver, cameraserver process layout, init triggers, AIDL boundaries, HAL clients
13-graphics-render-pipeline.md — SurfaceFlinger, BufferQueue, GraphicBuffer, OpenGL ES / Vulkan / Skia / HWUI, RenderThread, layer composition
14-animation-system.md — Choreographer, ValueAnimator/ObjectAnimator, RenderNode animations, dynamic animation, shared-element transitions
15-audio-system.md — AudioFlinger, AudioPolicyManager, audio HAL, AAudio/OpenSL ES, spatial audio (Spatializer), routing rules
16-media-and-camera.md — MediaCodec, MediaExtractor, NuPlayer, codec2 HAL, camera service, image/video pipeline overview
17-sensors.md — SensorService, sensor HAL, batching, wake-up sensors, FIFO and event delivery, sensor fusion

When to load which chapter

Question is about which native daemons exist or how they boot → 12-native-services.md
Question mentions SurfaceFlinger, BufferQueue, GraphicBuffer, OpenGL/Vulkan/Skia/HWUI, RenderThread, composition → 13-graphics-render-pipeline.md
Question mentions Choreographer, animator classes, RenderNode animations, springs/flings → 14-animation-system.md
Question mentions AudioFlinger, AudioPolicyManager, AAudio, OpenSL ES, Spatializer → 15-audio-system.md
Question mentions MediaCodec, MediaExtractor, NuPlayer, codec2, camera service → 16-media-and-camera.md
Question mentions sensors, SensorService, wake-up sensors, batching → 17-sensors.md

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AOSP Part XII — AI & Devices. Use when reasoning about on-device ML in AOSP, NNAPI, the AppFunctions framework for assistant integration, the Computer Control flow, CompanionDeviceManager, or virtual devices (virtual displays/inputs/cameras for cross-device experiences), or the NpuManager module for on-device neural accelerators (model-load admission control, the NDK ANpuBuffer surface, the android.hardware.npu HAL). Chapters 51–53.

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AOSP Internals — Appendices. Use when looking up a key file path (per-chapter table of the most important AOSP source files: build, init, kernel, HAL, framework services, system apps, infrastructure) or the meaning of an AOSP-specific acronym/term (Treble, VINTF, GKI, APEX, AIDL, HIDL, etc.), why Kotlin is absent from the public API, or what changed from Android 16 to Android 17. Reference material — load when you need a concrete path, a definition, or a changelog rather than narrative explanation.

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AOSP Part VIII — Connectivity. Use when reasoning about Networking (ConnectivityService, Wi-Fi framework, netd, DNS resolver, VPN, tethering, NetworkSecurityConfig, VCN, Thread mesh), Telephony (TelephonyManager, PhoneInterfaceManager, RIL/RILD, modem AIDL, IMS framework, emergency calling), Bluetooth (Bluetooth Mainline module, BTA, GATT, A2DP/HFP/AVDTP, LE Audio, pairing, scanning, advertising), NFC (NfcAdapter/NfcService, NCI, tag dispatch, HCE, secure element, reader mode, NFC-F/V), or USB & ADB (USB gadget framework, host-mode USB, MTP/PTP, RNDIS tethering, adb daemon, adb over Wi-Fi). Chapters 35–39.

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aosp-device-support

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AOSP Part XIV — Device Support. Use when reasoning about per-architecture support (ARM 32/64, x86_64, RISC-V, ABI matrix, toolchains), the QEMU-based Android emulator (AVD format, hardware acceleration, guest kernel), DevicePolicyManager (work profiles, fully-managed devices, COPE, enrollment), Android Automotive / TV / Wear (CarService, vehicle HAL, Leanback, TIF, Wear OS specifics), Print Services (PrintManager, IPP, PDF generation), or the Camera2 pipeline (Camera2 API, CaptureRequest/Result, camera HAL3). Chapters 59–62.

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AOSP Part VI — Framework Core. Use when reasoning about system_server's boot sequence (the four boot phases, service registration, Watchdog), the Intent system (Intent matching, IntentFilter, IntentResolver, package visibility, intent verification), Activity & Window Management (ActivityTaskManagerService, WindowManagerService, activity lifecycle, task/stack model, splash screens), the window system (WindowState, SurfaceControl, input dispatching, focus, IME insets, transitions), the display system (DisplayManagerService, logical vs. physical displays, HDR, brightness, refresh-rate switching), or the View system (View hierarchy, measure/layout/draw, Canvas/RenderNode, hardware acceleration). Chapters 20–25.

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AOSP Part VII — Framework Services. Use when reasoning about PackageManagerService (install/uninstall, APK parsing, permissions, package visibility), ContentProviders (ContentResolver, URI permissions, observers, FileProvider, MediaStore), Notifications (NMS, channels, ranker, posting/delivery, listener services, conversations, bubbles), Power Management (PowerManagerService, wake locks, Doze, App Standby, battery saver, BatteryStats), Background Tasks (JobScheduler, WorkManager, AlarmManager, foreground services, exact alarm policy), Multi-User (UserManagerService, profiles, restrictions, cross-user calls), Account & Sync (AccountManagerService, authenticator, syncadapter, SyncManager), Location (LocationManagerService, GPS/network/fused providers, GNSS HAL, geofencing), or Storage (vold, StorageManagerService, scoped storage, FUSE/sdcardfs, MediaProvider, SAF, FBE, adoptable storage, SQLite, SharedPreferences). Chapters 26–34.

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name	aosp-native-services-and-media
description	AOSP Part IV — Native Services & Media. Use when reasoning about surfaceflinger, audioserver, mediaserver, cameraserver, the graphics pipeline (BufferQueue, GraphicBuffer, OpenGL ES / Vulkan / Skia / HWUI, RenderThread, layer composition), the animation system (Choreographer, ValueAnimator, RenderNode animations, dynamic spring/fling), the audio stack (AudioFlinger, AudioPolicyManager, AAudio, OpenSL ES, Spatializer), the media pipeline (MediaCodec, MediaExtractor, NuPlayer, codec2 HAL), or the sensor stack (SensorService, sensor HAL, batching, wake-up sensors). Chapters 12–17.
metadata	{"author":"utzcoz","version":"2026.06.24","last-updated":"2026-06-24"}

AOSP Part IV — Native Services & Media

The native daemons that run continuously and own audio, video, sensors, and the graphics composition pipeline.

Chapters in this Part

12-native-services.md — surfaceflinger, audioserver, mediaserver, cameraserver process layout, init triggers, AIDL boundaries, HAL clients
13-graphics-render-pipeline.md — SurfaceFlinger, BufferQueue, GraphicBuffer, OpenGL ES / Vulkan / Skia / HWUI, RenderThread, layer composition
14-animation-system.md — Choreographer, ValueAnimator/ObjectAnimator, RenderNode animations, dynamic animation, shared-element transitions
15-audio-system.md — AudioFlinger, AudioPolicyManager, audio HAL, AAudio/OpenSL ES, spatial audio (Spatializer), routing rules
16-media-and-camera.md — MediaCodec, MediaExtractor, NuPlayer, codec2 HAL, camera service, image/video pipeline overview
17-sensors.md — SensorService, sensor HAL, batching, wake-up sensors, FIFO and event delivery, sensor fusion

When to load which chapter

Question is about which native daemons exist or how they boot → 12-native-services.md
Question mentions SurfaceFlinger, BufferQueue, GraphicBuffer, OpenGL/Vulkan/Skia/HWUI, RenderThread, composition → 13-graphics-render-pipeline.md
Question mentions Choreographer, animator classes, RenderNode animations, springs/flings → 14-animation-system.md
Question mentions AudioFlinger, AudioPolicyManager, AAudio, OpenSL ES, Spatializer → 15-audio-system.md
Question mentions MediaCodec, MediaExtractor, NuPlayer, codec2, camera service → 16-media-and-camera.md
Question mentions sensors, SensorService, wake-up sensors, batching → 17-sensors.md