re_viewer_context 0.31.0

Rerun viewer state that is shared with the viewer's code components.
Documentation 
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//! Viewer caches
//!
//! Caches are registered lazily upon first use, see [`Memoizers::entry`].
//! The concrete caches exposed here are always available for all viewer crates.

mod cache_trait;
mod image_decode_cache;
mod image_stats_cache;
mod memoizers;
mod store_cache;
mod tensor_stats_cache;
mod transform_database_store;
mod video_asset_cache;
mod video_stream_cache;

pub use cache_trait::Cache;
pub use memoizers::Memoizers;
pub use store_cache::StoreCache;
// TODO(andreas): Do we _really_ have to have all these caches in `re_viewer_context`?
// Caches are fully dynamic and registration based, so they can be added at runtime by any crate.
// The reason this happens it that various viewer crates wants to access these, mostly for ui purposes.
// Ideally, they would only depend on the ones needed.
pub use image_decode_cache::ImageDecodeCache;
pub use image_stats_cache::ImageStatsCache;
pub use tensor_stats_cache::TensorStatsCache;
pub use transform_database_store::TransformDatabaseStoreCache;
pub use video_asset_cache::VideoAssetCache;
pub use video_stream_cache::{
    SharablePlayableVideoStream, VideoStreamCache, VideoStreamProcessingError,
};

// ----

fn filter_blob_removed_events(
    events: &[&re_chunk_store::ChunkStoreEvent],
) -> ahash::HashSet<crate::StoredBlobCacheKey> {
    use re_sdk_types::Component as _;

    events
        .iter()
        .filter_map(|e| e.to_deletion())
        .flat_map(|del| {
            del.chunk
                .component_descriptors()
                .filter(|descr| {
                    descr.component_type == Some(re_sdk_types::components::Blob::name())
                })
                .flat_map(|descr| {
                    del.chunk
                        .row_ids()
                        .map(move |row_id| crate::StoredBlobCacheKey::new(row_id, descr.component))
                })
        })
        .collect()
}