Struct SampleGroupDescription 

pub struct SampleGroupDescription {
    pub grouping_type: [u8; 4],
    pub default_sample_description_index: Option<u32>,
    pub entries: Vec<Vec<u8>>,
}

One sgpd (SampleGroupDescriptionBox) to emit on a track.

Pairs with an sbgp of the same grouping_type. The per-group entry payload is grouping-type-specific and opaque to the container — callers supply entries as already-serialised Vec<u8>s.

default_sample_description_index (if Some(_)) requests the version-2 layout: the box header carries a default_sample_description_index to apply to samples not mapped by any sbgp of this type, and entries are emitted back-to-back without per-entry length prefixes (all entries must share a common non-zero length).

Fields

grouping_type: [u8; 4]

Four-byte grouping type matching the paired sbgp.

default_sample_description_index: Option<u32>

default_sample_description_index (version 2). Some(0) means “no group of this type” per §8.9.3 (the default value).

entries: Vec<Vec<u8>>

Per-group entry payloads, grouping-type-specific and opaque. Empty is a legal “zero-entry” sgpd.

Trait Implementations

impl Clone for SampleGroupDescription

fn clone(&self) -> SampleGroupDescription

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SampleGroupDescription

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

Formats the value using the given formatter.

impl Default for SampleGroupDescription

fn default() -> SampleGroupDescription

Returns the “default value” for a type.