IWMCodecLeakyBucket::SetBufferSizeBits Method

项目
04/12/2010

Sets the buffer size in bits.

Syntax

HRESULT SetBufferSizeBits(
  [in]  ULONG ulBufferSize
);

Parameters

ulBufferSize [in]
The buffer size, in bits.

Return Value

This method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The method succeeded.

Remarks

This method is not implemented on the audio encoder objects. If you call this method from the IWMCodecLeakyBucket interface it returns E_NOTIMPL.

The buffer size is equal to the bit rate of the stream multiplied by the buffer window. For example, a stream with a bit rate of 28 kilobits per second with a buffer window of 3 seconds would have a buffer of 28000 bits per second x 3 seconds = 84000 bits.

This method is an alternative to setting the MFPKEY_VIDEOWINDOW property. Using this method does not alter the bit rate of the stream, but does alter the buffer window. Using the stream with a bit rate of 28000 bits per second from the previous example, setting the buffer size to 84000 using this method would have exactly the same effect as setting MFPKEY_VIDEOWINDOW to 3000 milliseconds (3 seconds).

Requirements

Minimum supported client	Windows XP
Minimum supported server	Windows Server 2003
Header	Wmcodecdsp.h

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