Class AudioLoudNormBlock

Namespace

VisioForge.Core.MediaBlocks.AudioProcessing

Assembly

VisioForge.Core.dll

Audio loudness normalization block using audioloudnorm from rsaudiofx plugin. Normalizes audio according to EBU R128 loudness standards with configurable target levels, loudness range, and peak limiting. Essential for broadcast compliance, streaming platforms, and maintaining consistent audio levels across different content. Implements the VisioForge.Core.MediaBlocks.MediaBlock. Implements the VisioForge.Core.MediaBlocks.IMediaBlockInternals. Implements the IDisposable.

public class AudioLoudNormBlock : MediaBlock, IMediaBlock, IDisposable, IMediaBlockInternals

Inheritance

object

MediaBlock

AudioLoudNormBlock

Implements

IMediaBlock

IDisposable

IMediaBlockInternals

Inherited Members

MediaBlock._isBuilt

MediaBlock._pipeline

MediaBlock._pipelineCtx

MediaBlock.GetPipelineContext()

MediaBlock.SetPipelineContext(BlockPipelineContext)

MediaBlock.SetPipeline(MediaBlocksPipeline)

MediaBlock.Context

MediaBlock.Name

MediaBlock.IsBuilt

MediaBlock.Owner

MediaBlock.Type

MediaBlock.ID

MediaBlock.Input

MediaBlock.Inputs

MediaBlock.Output

MediaBlock.Outputs

MediaBlock.HasInputs

MediaBlock.HasOutputs

MediaBlock.Build()

MediaBlock.CreateElements()

MediaBlock.AddElementsToPipeline()

MediaBlock.RemoveElementsFromPipeline()

MediaBlock.DeepCopy(string)

MediaBlock.Reset()

MediaBlock.ToYAMLBlock()

MediaBlock.ClearPads()

MediaBlock.Dispose(bool)

MediaBlock.Dispose()

object.Equals(object?)

object.Equals(object?, object?)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object?, object?)

object.ToString()

Extension Methods

MediaBlockExtensions.GetInputPadByType(IMediaBlock, MediaBlockPadMediaType)

MediaBlockExtensions.GetOutputPadByType(IMediaBlock, MediaBlockPadMediaType)

MediaBlockHelper.SendEndOfStream(MediaBlock)

MediaBlockHelper.SendEvent(MediaBlock, Event)

MediaBlockHelper.SetState(MediaBlock, State)

Constructors

AudioLoudNormBlock()

Initializes a new instance of the VisioForge.Core.MediaBlocks.AudioProcessing.AudioLoudNormBlock class with default loudness normalization settings.

public AudioLoudNormBlock()

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[]

LoudnessRangeTarget

Gets or sets the loudness range target in LU. Valid range: 1.0 to 20.0. Default: 7.0. This controls the dynamic range of the normalized audio.

public double LoudnessRangeTarget { get; set; }

Property Value

double

LoudnessTarget

Gets or sets the loudness target in LUFS. Valid range: -70.0 to -5.0. Default: -24.0. This sets the target integrated loudness level for the normalized audio.

public double LoudnessTarget { get; set; }

Property Value

double

MaxTruePeak

Gets or sets the maximum true peak in dbTP. Valid range: -9.0 to 0.0. Default: -2.0. This prevents peaks from exceeding the specified level to avoid clipping.

public double MaxTruePeak { get; set; }

Property Value

double

Offset

Gets or sets the offset gain in LU. Valid range: -99.0 to 99.0. Default: 0.0. This applies an additional gain offset to the normalized audio.

public double Offset { get; set; }

Property Value

double

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 audio loudness normalization filter and its associated GStreamer elements. This method creates the filter with the specified normalization parameters, establishes input and output pads, and prepares the block for normalizing audio according to EBU R128 standards.

public override bool Build()

Returns

bool

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

CleanUp()

Releases all resources and performs cleanup operations for this audio loudness normalization block. This method disposes of the GStreamer elements and resets the build state.

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 audio loudness normalization filter element.

public BaseElement GetCore()

Returns

BaseElement

The BaseElement wrapper instance that encapsulates the GStreamer audio loudness normalization filter.

GetElement()

Gets the underlying GStreamer element that performs the loudness normalization processing.

public Element GetElement()

Returns

Element

The GStreamer Element instance representing the audio loudness normalization filter.

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 audio loudness normalization 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

MediaBlock

IMediaBlockInternals

IDisposable