ObjectAudioFinding

struct ObjectAudioFinding

Declared in Sources/PrismCore/Remux/ObjectAudioFinding.swift · PrismCore 3.5.4

What the bitstream said about object audio on one stream-copied E-AC-3 track — as opposed to what the container's metadata claimed.

The distinction is the whole reason this type exists. AudioTrackInfo's isObjectAudio reads AVCodecParameters.profile, and libavformat only ever fills that in when avformat_find_stream_info happened to decode an audio frame while it was sampling. Nothing guarantees it did. So the claim is a guess that fails silently in the false direction: a real Atmos track reported as plain DD+, with no error anywhere.

PrismCore already reads the truth for its own purposes — EAC3Syncframe walks the BSI to find the TS 103 420 complexity_index_type_a, because the dec3 box the muxer writes needs that number. This publishes what that walk found, so a host can state what is playing instead of repeating the guess.

Initializers

init(streamIndex:complexityIndex:claimedByMetadata:)source

init(streamIndex: Int, complexityIndex: Int?, claimedByMetadata: Bool)

No documentation comment in the source.

Instance properties

streamIndex source

let streamIndex: Int

The source stream this describes.

complexityIndex source

let complexityIndex: Int?

complexity_index_type_a from the first syncframe that answered, or nil when the walk read its whole budget of frames and found no JOC. Either way the question is settled: a finding only exists once the bitstream has been asked.

claimedByMetadata source

let claimedByMetadata: Bool

What the container's metadata claimed before a frame was read. Kept because the interesting case is the disagreement — and because a host that logs both learns which sources lie.

isObjectAudio source

var isObjectAudio: Bool { get }

Whether this track really carries Dolby Atmos objects.

wasMissedByMetadata source

var wasMissedByMetadata: Bool { get }

The metadata said no and the bitstream said yes — the silent failure this whole mechanism exists to catch.

Generated from the public symbols of PrismCore 3.5.4. All types