Playback State

app.domain.video.playback_state

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Playback view_state management — frame position and playback status.

See Also

• SessionState — aggregates playback with session settings
• Direction — represents frame-navigation direction

Layer: Domain. Context: Defines application concepts independently of UI and infrastructure implementations.

PlaybackState dataclass

Tracks the current playback view_state of a video session.

ATTRIBUTE	DESCRIPTION
_current_frame_index	Currently displayed frame as a 0-based index. TYPE: int
_is_playing	Whether the video is actively playing. TYPE: bool

Note

Uses property accessors with private backing fields while still keeping a lightweight slotted dataclass layout. Instances start at frame 0 with playback paused, then update as the user plays, pauses, or seeks. Supports tracking the visible frame, controlling playback, updating UI progress indicators, and synchronizing buffered data with user position.

Layer: Domain. Context: Represents application concepts without UI or infrastructure dependencies.

current_frame_index: int property writable

Return the zero-based frame index stored in this state.

RETURNS	DESCRIPTION
int	Current playback frame index.

is_playing: bool property writable

Return whether playback is active.

RETURNS	DESCRIPTION
bool	True when playback is active; otherwise False.

__init__(_current_frame_index: int = 0, _is_playing: bool = False) -> None

stop_playback() -> None

Stop playback.