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Audio Capabilities and Sync

The control surface exposes audio-device, route, and level information without forcing callers to know which backend is active.

Audio-related APIs

GpuMediaPlayer exposes:

• AudioCapabilities
• GetAudioInputDevices()
• GetAudioOutputDevices()
• GetAudioRouteState()
• TryGetAudioLevels(out MediaAudioLevels levels)

Sync responsibilities

Backends are responsible for maintaining playback timing and seek behavior. The reusable TimelineSeekController coordinates drag-based seeking so slider interactions can stay responsive across both fast and slow backends.

Capability model

MediaAudioCapabilities gives the application a backend-neutral way to decide whether route changes, level meters, loopback, or device selection should be shown in the UI.