video_pool library
Enterprise video orchestration for Flutter.
Provides intelligent controller pooling with instance reuse, visibility-based lifecycle management, thermal throttling, disk caching, and ready-to-use widgets.
Classes
- AudioFocusManager
- Manages system audio focus and app lifecycle pause/resume behavior.
- BandwidthEstimator
- Estimates network bandwidth using Exponential Moving Average (EMA) from prefetch download durations.
- BandwidthSampleEvent
- A bandwidth measurement sample from a completed download.
- BandwidthThresholds
- Bandwidth thresholds for network-aware preload adjustment.
- CachedFile
- Metadata for a cached video file on disk.
- CacheEvent
- Emitted on disk cache interactions (hit, miss, evict, prefetch complete).
- DecoderBudget
- Abstract interface for decoder budget management.
- DefaultLifecyclePolicy
- Default lifecycle policy for feed-style video playback.
- DeviceCapabilities
- Describes the hardware capabilities of the current device.
- DeviceMonitor
- Default VideoPoolPlatform implementation backed by platform channels.
- DeviceStatus
- A snapshot of current device health reported by the native platform.
- EmergencyFlushEvent
- Emitted when an emergency memory flush disposes all non-primary players.
- ErrorEvent
- Emitted when an error occurs within the pool or one of its subsystems.
- FilePreloadManager
- Manages pre-fetching video data to disk so that the player can open local files instead of streaming from the network.
- GlobalDecoderBudget
- Default implementation using a fixed global token budget.
- LifecycleEvent
- Emitted when a pool entry transitions between lifecycle states.
- LifecycleOrchestrator
- The reconciliation engine that decides what each player slot should do.
- LifecyclePolicy
- Strategy interface for lifecycle reconciliation logic.
-
LruCache<
K, V> - A generic Least Recently Used (LRU) cache.
- MediaKitAdapter
- A PlayerAdapter implementation backed by media_kit.
- MemoryManager
- Manages memory tracking and eviction for the video pool.
- MetricsSnapshot
-
A point-in-time metrics summary computed lazily from an
EventRingBuffer. - NoOpVideoPoolPlatform
- A VideoPoolPlatform implementation that does nothing.
- PlaybackConfig
- Configuration for video playback behavior.
- PlayerAdapter
- Abstract interface for a video player instance.
- PlayerState
- Immutable snapshot of a player's current state.
- PoolEntry
- Wraps a single pooled PlayerAdapter with lifecycle metadata.
- PoolEvent
- Base class for all pool events.
- PoolStatistics
- Debug metrics for a VideoPool instance.
- PredictionEvent
- Emitted when the predictive scroll engine makes or resolves a prediction.
- PredictionResult
- The result of a scroll destination prediction.
- PredictiveScrollEngine
- A stateless, pure-math engine that predicts where a scroll will stop.
- ReconcileEvent
- Emitted after the orchestrator completes a reconciliation pass.
- ReconciliationPlan
- The result of a lifecycle reconciliation pass.
- SwapEvent
- Emitted when a player instance swaps its media source to a new index.
- ThrottleEvent
- Emitted when thermal or memory conditions cause the pool to throttle.
- ThumbnailExtractor
- Extracts thumbnail images from cached video files.
- TokenEvent
- Base class for all token-related events in the decoder budget system.
- TokenGrantedEvent
- Emitted when tokens are released back to the budget, making them available for other pools.
- TokenRequestEvent
- Emitted when a pool requests tokens from the decoder budget.
- TokenRevokedEvent
- Emitted when tokens are revoked from a pool due to budget reduction.
- VideoCard
- Individual video widget with full lifecycle management.
- VideoErrorWidget
- Error UI shown when a video fails to load or play.
- VideoFeedView
- TikTok/Reels style full-screen vertical video feed.
- VideoListView
- Instagram-style mixed content list with video support.
- VideoOverlay
- Overlay shown on top of the video surface for play/pause controls and loading indicators.
- VideoPool
- The central video pool coordinator.
- VideoPoolConfig
- Configuration for a VideoPool instance.
- VideoPoolLogger
- Logging utility for the video pool.
- VideoPoolPlatform
- Abstract interface for native device monitoring.
- VideoPoolProvider
- An InheritedWidget that exposes a VideoPool to the widget tree.
- VideoPoolScope
- A StatefulWidget that owns the lifecycle of a VideoPool.
- VideoSource
- Describes a video resource to be played.
- VideoThumbnail
- Placeholder widget shown before video playback begins.
- VisibilityTracker
- Computes intersection ratios for items in a scrollable list.
- VisibilityUpdate
- Result of a visibility computation.
Enums
- CacheAction
- Actions that can occur on a cache entry.
- LifecycleState
- The lifecycle state of a video slot within the pool.
- LogLevel
- Log verbosity level for VideoPoolLogger.
- MemoryPressureLevel
- Categorizes system memory pressure into actionable levels.
- PlaybackPhase
- The phase of a player's playback lifecycle.
- ResolutionHint
- Hint about expected video resolution for memory estimation.
- ThermalLevel
- Device thermal level reported by the OS.
- VideoSourceType
- The type of video source.
Functions
-
defaultVideoPoolPlatform(
) → VideoPoolPlatform - Returns the default VideoPoolPlatform for the current runtime platform.
Typedefs
- EffectiveLimits = ({int maxConcurrent, int memoryBudget, int preloadCount})
- Effective resource limits computed from config + device conditions.
-
EvictionCallback<
K, V> = void Function(K key, V value) - A callback invoked when an entry is evicted from the cache.
- VideoSourceResolver = VideoSource? Function(int index)
- Callback to resolve a video index to its VideoSource.