Module base_index 

SegmentBase + sidx: the on-demand profile’s segment ranges (ISO/IEC 23009-1 5.3.9.5.4; ISO/IEC 14496-12:2026 8.14.3).

The Representation is one file; @indexRange locates its sidx box. The sidx offsets are anchored at the first byte after the box (14496-12:2026 8.14.3), so each reference’s byte range follows from the box alone.

Structs

IndexedSegment

One subsegment described by a sidx.

Functions

anchor_after

The anchor offset: the first byte after the index box, i.e. indexRange.last + 1.

parse_index

Parse the bytes of @indexRange (the whole sidx box, header included).

segments

The subsegments of sidx, with byte ranges relative to the file start. anchor is anchor_after of the @indexRange.