IMFASFContentInfo::GetHeaderSize method (wmcontainer.h)

Article
02/22/2024

Retrieves the size of the header section of an Advanced Systems Format (ASF) file.

Syntax

HRESULT GetHeaderSize(
  [in]  IMFMediaBuffer *pIStartOfContent,
  [out] QWORD          *cbHeaderSize
);

Parameters

[in] pIStartOfContent

The IMFMediaBuffer interface of a buffer object containing the beginning of ASF content. The size of the valid data in the buffer must be at least MFASF_MIN_HEADER_BYTES in bytes.

[out] cbHeaderSize

Receives the size, in bytes, of the header section of the content. The value includes the size of the ASF Header Object plus the size of the header section of the Data Object. Therefore, the resulting value is the offset to the start of the data packets in the ASF Data Object.

Return value

The 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.
MF_E_ASF_INVALIDDATA	The buffer does not contain valid ASF data.
MF_E_BUFFERTOOSMALL	The buffer does not contain enough valid data.

Remarks

The header of an ASF file or stream can be passed to the IMFASFContentInfo::ParseHeader method to populate the ContentInfo object with the header information.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Target Platform	Windows
Header	wmcontainer.h
Library	Mfuuid.lib