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aosp-native-services-and-media

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UpdatedJune 23, 2026 at 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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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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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