Enum SourceOutput 

#[non_exhaustive]
pub enum SourceOutput {
    Bytes(Box<dyn BytesSource>),
    Packets(Box<dyn PacketSource>),
    Frames(Box<dyn FrameSource>),
    MultiTitle(Box<dyn MultiTitleSource>),
}

What a SourceRegistry::open call returns. The variant is decided at driver-registration time, so callers can match on the shape and branch the pipeline accordingly.

Marked #[non_exhaustive] so a new source kind (e.g. a future LiveStream variant) can be added without semver-breaking downstream consumers. Match arms must include a wildcard.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Bytes(Box<dyn BytesSource>)

A raw byte stream — feed it to container probing / a demuxer.

Packets(Box<dyn PacketSource>)

Already-demuxed compressed packets — feed them to decoders.

Frames(Box<dyn FrameSource>)

Already-decoded frames (e.g. a capture device) — feed them to filters / encoders directly.

MultiTitle(Box<dyn MultiTitleSource>)

A multi-title source (BD-ROM, DVD-Video, multi-edition MKV). Callers fan out: each title is opened independently via MultiTitleSource::open_title, demuxed, and routed to its own output sink.