Table of Contents

Class VAAPIH264DecoderBlock

Namespace
VisioForge.Core.MediaBlocks.Sources
Assembly
VisioForge.Core.dll

VAAPI H.264/AVC hardware decoder block for Linux systems using Video Acceleration API. This block provides GPU-accelerated H.264 video decoding through VA-API (Video Acceleration API), the standard Linux API for hardware video acceleration. Supports Intel, AMD, and NVIDIA GPUs with appropriate drivers (Intel Media Driver, Mesa RADV/RadeonSI, NVIDIA VDPAU-VA driver). Features include support for all H.264 profiles (Baseline, Main, High, High 10, High 4:2:2, High 4:4:4) up to Level 5.2, low CPU usage, high performance decoding up to 8K resolution, and automatic fallback to software decoding if hardware is unavailable. Essential for video players, streaming applications, video editors, and any Linux application requiring efficient H.264 video decoding with minimal CPU usage. Implements the VisioForge.Core.MediaBlocks.MediaBlock. Implements the VisioForge.Core.MediaBlocks.IMediaBlockInternals. Implements the IDisposable.

public class VAAPIH264DecoderBlock : MediaBlock, IMediaBlock, IDisposable, IMediaBlockInternals

Inheritance

Implements

Inherited Members

Extension Methods

Constructors

VAAPIH264DecoderBlock()

Initializes a new instance of the VisioForge.Core.MediaBlocks.Sources.VAAPIH264DecoderBlock class.

public VAAPIH264DecoderBlock()

Properties

Input

Gets the input.

public override MediaBlockPad Input { get; }

Property Value

MediaBlockPad

Inputs

Gets the inputs.

public override MediaBlockPad[] Inputs { get; }

Property Value

MediaBlockPad[]

Output

Gets the output.

public override MediaBlockPad Output { get; }

Property Value

MediaBlockPad

Outputs

Gets the outputs.

public override MediaBlockPad[] Outputs { get; }

Property Value

MediaBlockPad[]

Type

Gets the type.

public override MediaBlockType Type { get; }

Property Value

MediaBlockType

Methods

Build()

Constructs and initializes the VAAPI H.264 decoder and its associated GStreamer elements. This method creates the hardware decoder, establishes input and output pads, and prepares the block for GPU-accelerated H.264 decoding through the Linux VA-API interface.

public override bool Build()

Returns

bool

true if the decoder was successfully built and configured; false if initialization failed.

CleanUp()

Releases all resources and performs cleanup operations for this VAAPI H.264 decoder block. This method disposes of the GStreamer elements and releases VA-API resources.

public void CleanUp()

Dispose(bool)

Releases unmanaged and - optionally - managed resources.

protected override void Dispose(bool disposing)

Parameters

disposing bool

true to release both managed and unmanaged resources; false to release only unmanaged resources.

GetCore()

Gets the core BaseElement wrapper that provides additional functionality around the GStreamer VAAPI H.264 decoder element.

public BaseElement GetCore()

Returns

BaseElement

The BaseElement wrapper instance that encapsulates the GStreamer VAAPI H.264 decoder.

GetElement()

Gets the underlying GStreamer element that performs VAAPI H.264 hardware decoding.

public Element GetElement()

Returns

Element

The GStreamer Element instance representing the VAAPI H.264 decoder.

IsAvailable()

Determines whether this media block is available. Correct NuGet SDK redist should be included into your project.

public static bool IsAvailable()

Returns

bool

true if this media block is available; otherwise, false.

IMediaBlockInternals.SetContext(MediaBlocksPipeline)

Associates this VAAPI H.264 decoder block with a pipeline and initializes its internal context. This method is called internally when the block is added to a pipeline.

void IMediaBlockInternals.SetContext(MediaBlocksPipeline pipeline)

Parameters

pipeline MediaBlocksPipeline

The MediaBlocksPipeline instance that will manage this block.

See Also