Struct CaptionMeta 

pub struct CaptionMeta {
    pub triples: Vec<CaptionTriple>,
}

The closed-caption bytes the coded picture this frame came from carried (its A/53 GA94 caption SEI, or a container caption track). Lets a decode -> re-encode chain re-author captions the decoder would otherwise have dropped with the bitstream.

Only the triples are stored: the rest of the A/53 cc_data header is either constant (process_cc_data_flag, em_data) or derived (cc_count = the triple count), so a rebuilt SEI is byte-identical.

Fields

triples: Vec<CaptionTriple>

Implementations

impl CaptionMeta

pub fn new() -> Self

pub fn push(&mut self, triple: CaptionTriple)

Append one caption triple, in transmission order.

pub fn iter(&self) -> impl Iterator<Item = &CaptionTriple>

Iterate the carried triples in transmission order.

pub fn is_empty(&self) -> bool

pub fn len(&self) -> usize

Trait Implementations

impl Clone for CaptionMeta

fn clone(&self) -> CaptionMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CaptionMeta

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

Formats the value using the given formatter.

impl Default for CaptionMeta

fn default() -> CaptionMeta

Returns the “default value” for a type.

impl Eq for CaptionMeta

impl FrameMeta for CaptionMeta

fn propagate(&self, _transform: Transform) -> Propagation

Captions are text on a timeline, not pixel geometry, so they survive a scale / crop / copy and a re-encode: the whole point is that a caption inserter downstream of an encoder can re-author them into the new bitstream.

fn as_any(&self) -> &dyn Any

fn as_any_mut(&mut self) -> &mut dyn Any

fn clone_box(&self) -> Box<dyn FrameMeta>

A boxed deep copy of this meta, the GstMeta copy_func analog. Backs the copy-on-write of a shared meta when a tee branch mutates it (see FrameMetaSet::get_mut); each FrameMeta impl is its own concrete type, so the duplication can only be expressed on the trait.

impl PartialEq for CaptionMeta

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CaptionMeta