Table of Contents

Class NVJPEGDecoderBlock

Namespace
VisioForge.Core.MediaBlocks.VideoDecoders
Assembly
VisioForge.Core.dll

NVIDIA hardware-accelerated JPEG decoder block using NVJPEG technology. This block leverages NVIDIA GPU hardware to decode JPEG images and MJPEG streams with exceptional performance, offloading the CPU-intensive decoding process to the GPU. Ideal for high-throughput image processing, multi-camera surveillance systems, and real-time MJPEG video decoding.

Hardware requirements: NVIDIA GPU with compute capability 3.5 or higher

Supported formats: Baseline JPEG, Progressive JPEG, MJPEG streams

Performance: Can decode thousands of images per second depending on GPU and image size

Use cases: High-speed image processing, multi-stream surveillance, medical imaging, machine vision

Implements the VisioForge.Core.MediaBlocks.MediaBlock. Implements the VisioForge.Core.MediaBlocks.IMediaBlockInternals. Implements the IDisposable. 
public class NVJPEGDecoderBlock : MediaBlock, IMediaBlock, IDisposable, IMediaBlockInternals

Inheritance

Implements

Inherited Members

Extension Methods

Constructors

NVJPEGDecoderBlock()

Initializes a new instance of the VisioForge.Core.MediaBlocks.VideoDecoders.NVJPEGDecoderBlock class. The decoder requires an NVIDIA GPU with CUDA support and the NVJPEG library.

public NVJPEGDecoderBlock()

Properties

Input

Gets the primary input pad for receiving JPEG encoded data.

public override MediaBlockPad Input { get; }

Property Value

MediaBlockPad

Inputs

Gets all input pads available on this hardware decoder block.

public override MediaBlockPad[] Inputs { get; }

Property Value

MediaBlockPad[]

Output

Gets the primary output pad that provides hardware-decoded image frames.

public override MediaBlockPad Output { get; }

Property Value

MediaBlockPad

Outputs

Gets all output pads available on this hardware decoder block.

public override MediaBlockPad[] Outputs { get; }

Property Value

MediaBlockPad[]

Type

Gets the media block type identifier for this NVIDIA JPEG hardware decoder.

public override MediaBlockType Type { get; }

Property Value

MediaBlockType

Methods

Build()

Builds and initializes the NVIDIA JPEG hardware decoder within the pipeline, allocating GPU resources and configuring NVJPEG for high-speed image decoding.

public override bool Build()

Returns

bool

true if the hardware decoder was successfully initialized; false if GPU resources are unavailable.

CleanUp()

Performs cleanup of GPU resources, releasing NVJPEG hardware decoder and freeing allocated GPU memory.

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 underlying GStreamer NVJPEG element for advanced GPU configuration.

public BaseElement GetCore()

Returns

BaseElement

The core NVIDIA JPEG hardware decoder element instance.

GetElement()

Gets the native GStreamer NVJPEG element for direct hardware manipulation.

public Element GetElement()

Returns

Element

The underlying GStreamer NVIDIA JPEG decoder element.

IsAvailable()

Determines whether NVIDIA hardware JPEG decoding is available on the current system. This method checks for compatible NVIDIA GPU hardware, CUDA support, and NVJPEG library. Ensure the NVIDIA NVJPEG SDK redistribution package is included in your project.

public static bool IsAvailable()

Returns

bool

true if NVIDIA JPEG hardware decoding is available; otherwise, false.

IMediaBlockInternals.SetContext(MediaBlocksPipeline)

Sets the pipeline context for this hardware decoder block, establishing GPU resource management and pipeline integration.

void IMediaBlockInternals.SetContext(MediaBlocksPipeline pipeline)

Parameters

pipeline MediaBlocksPipeline

The parent MediaBlocksPipeline that manages GPU resources.

See Also