Struct BagSliceSource 

pub struct BagSliceSource { /* private fields */ }

In-place SliceSource for rosbags. The bag’s own chunk index (ChunkInfo) gives each chunk’s byte offset and time range, so time slicing seeks straight to the overlapping chunks and decompresses only those — no full read, bounded memory. Event counts aren’t in the index, so n_events/slice_index decode the target chunks once and cache the per-chunk cumulative counts; time slicing never triggers that.

Trait Implementations

impl SliceSource for BagSliceSource

fn sensor_size(&self) -> (usize, usize)

fn timestamp_scale_ms(&self) -> f64

fn n_events(&self) -> usize

Total events in the file.

fn time_span(&self) -> (i64, i64)

(t_min, t_max) in microseconds across the whole file; (0, 0) when empty.

fn slice_time(&self, t0: i64, t1: i64) -> Result<EventStream, IoError>

Events whose timestamp (µs) lies in the half-open window [t0, t1).

fn slice_index(&self, i0: usize, i1: usize) -> Result<EventStream, IoError>

Events whose index lies in [i0, i1) (clamped to the file).