Enum TrackBounds 

pub enum TrackBounds {
    SessionGap,
    Gapless,
}

Policy for deriving a track’s half-open sector range from a Toc.

A track begins at its own Track::start_lba. Normally it ends at the next track’s start_lba, or at Toc::leadout_lba when it is the final track.

CD-Extra session gaps

A CD-Extra disc places a standard 11,400-sector inter-session gap between its final audio track and the following data session. This is 152 seconds, or 2 minutes 32 seconds. In a geometry-preserving address space, the first data track’s start_lba lies after that gap, so treating it as the audio track’s end would incorrectly include the gap in the audio range.

Some image formats and extracts remove the inter-session gap and store the tracks back-to-back. In that layout, the next track’s start_lba is already the correct end of the audio track; subtracting 11,400 sectors would instead truncate 152 seconds of audio.

This policy affects only the last audio track followed exclusively by data tracks. All other tracks have identical bounds under both variants.

Choose the variant according to the address space represented jointly by the backing and its Toc:

• SessionGap for a physical disc or an image that preserves the disc’s original sector geometry.
• Gapless for a contiguous, gap-stripped image or extract.

Gapless refers only to the CD-Extra inter-session gap. It does not remove ordinary track pregaps or provide gapless playback.

read_track and open_track_stream use SessionGap by default. Use read_track_with_bounds or open_track_stream_with_bounds when the source requires an explicit policy.

Variants

SessionGap

The address space includes the CD-Extra inter-session gap.

When applicable, the final audio track ends 11,400 sectors before the following data track.

Gapless

The address space stores tracks contiguously without the CD-Extra inter-session gap.

Every track ends at the next track’s start, or at the lead-out.

Trait Implementations

impl Clone for TrackBounds

fn clone(&self) -> TrackBounds

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for TrackBounds

impl Debug for TrackBounds

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for TrackBounds

impl PartialEq for TrackBounds

fn eq(&self, other: &TrackBounds) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for TrackBounds