CodecCapability class

One concrete thing a backend can do: a codec, in one direction, via one path, with a known I/O and cost profile. Immutable + cheap to enumerate.

Constructors

CodecCapability({required String backendName, required CodecDirection direction, required HwPath hwPath, required bool isHardware, VideoCodec? videoCodec, AudioCodec? audioCodec, Container? container, String? customName, bool zeroCopy = false, Set<FrameSourceKind> acceptedInputs = const {}, Set<FrameSourceKind> producedOutputs = const {}, int? maxWidth, int? maxHeight, int score = 0, int initCostHint = 0})

const

Properties

acceptedInputs → Set<FrameSourceKind>

ENCODE: the FrameSource kinds this path can consume directly.

final

audioCodec → AudioCodec?

final

backendName → String

final

container → Container?

final

customName → String?

Identity of a VideoCodec.custom capability (see the enum docs). The negotiator only matches a custom capability to a query with the SAME name. null for the built-in codecs.

final

direction → CodecDirection

final

hashCode → int

The hash code for this object.

no setter, inherited

hwPath → HwPath

The acceleration path this capability runs on.

final

initCostHint → int

Rough one-time open cost in ms (device/session creation). Cheaper wins ties so a trivial software fallback isn't chosen over an equal HW path but a heavy HW session isn't chosen over a cheaper equivalent.

final

isHardware → bool

True for any non-software path. Convenience over hwPath != software.

final

maxHeight → int?

final

maxWidth → int?

Optional resolution ceiling (encoder/decoder level limits).

final

producedOutputs → Set<FrameSourceKind>

DECODE: the output kinds this path produces (e.g. {d3d11Texture} for a GPU-resident decoder, {cpu} for a software one). Consumers read this to pick their present path without probing the returned frame.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

score → int

Tie-break quality/preference hint; higher = better. Backend-defined.

final

videoCodec → VideoCodec?

Exactly one of these is non-null: a video codec, an audio codec, or — for CodecDirection.mux/CodecDirection.demux caps — a container.

final

zeroCopy → bool

True when the path keeps frames on the GPU end-to-end (no CPU readback): a decoder that produces a D3D11 texture the present device can import, or an encoder that consumes a GPU texture directly.

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited