Class MFMediaBuffer

The IMFMediaBuffer interface represent a buffer of multimedia data for any possible multimedia type. It provides methods for accessing the buffer pointer, the current length, and the maximum length of the buffer

Inheritance

object

DXComObject

MFMediaBuffer

Implements

IDisposable

Inherited Members

DXComObject.Dispose()

DXComObject.AddRef()

DXComObject.Release()

DXComObject.QueryInterface(in Guid)

DXComObject.Handle

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: JeremyAnsel.DirectX.MediaFoundation

Assembly: JeremyAnsel.DirectX.MediaFoundation.dll

Syntax

[SecurityCritical]
public class MFMediaBuffer : DXComObject, IDisposable

Constructors

MFMediaBuffer(nint)

Initializes a new instance of the MFMediaBuffer class.

Declaration

public MFMediaBuffer(nint comPtr)

Parameters

Type	Name	Description
nint	comPtr

Fields

MFMediaBufferGuid

The interface GUID.

Declaration

public static readonly Guid MFMediaBufferGuid

Field Value

Type	Description
Guid

Methods

AsMF2DBuffer()

Declaration

public MF2DBuffer? AsMF2DBuffer()

Returns

Type	Description
MF2DBuffer

GetCurrentLength()

The GetCurrentLength method returns the current length of the media buffer.

Declaration

public uint GetCurrentLength()

Returns

Type	Description
uint

Remarks

A returned value of zero bytes indicates a media buffer with no valid data (an empty buffer).

GetMaxLength()

The GetMaxLength method allows the caller to retrieve the maximum length of the buffer represented by the IMFMediaBuffer object.

Declaration

public uint GetMaxLength()

Returns

Type	Description
uint

Lock(out nint, out uint, out uint)

Declaration

public void Lock(out nint ppbBuffer, out uint pcbMaxLength, out uint pcbCurrentLength)

Parameters

Type	Name	Description
nint	ppbBuffer
uint	pcbMaxLength
uint	pcbCurrentLength

SetCurrentLength(uint)

The SetCurrentLength method allows the caller to set the current length of the media buffer.

Declaration

public void SetCurrentLength(uint cbCurrentLength)

Parameters

Type	Name	Description
uint	cbCurrentLength	Current length of the media buffer in bytes.

Remarks

This method should be used anytime a client modifies the content of the media buffer in such a way that the length of valid data in the media buffer changes.

Unlock()

The Unlock method signals completion of the use of the buffer pointer acquired via the Lock method.

Declaration

public void Unlock()

Remarks

The buffer pointer acquired via Lock can no longer be used once the caller signals completion of that usage via the Unlock call. Also, note that Unlock must be called the same number of times that Lock has been called in order to signal completion of the use of the buffer pointer.

Implements

IDisposable