MF_BYTESTREAMHANDLER_ACCEPTS_SHARE_WRITE attribute

Specifies whether a byte-stream handler can use a byte stream that is opened for writing by another thread.

Data type

UINT32

Get/set

To get this attribute, call IMFAttributes::GetUINT32.

To set this attribute, call IMFAttributes::SetUINT32.

Remarks

Byte-stream handlers can support this attribute. To get or set the attribute, first query the byte-stream handler for the IMFAttributes interface. Then call IMFAttributes::GetUINT32 or IMFAttributes::SetUINT32

If this attribute is TRUE, it means that the byte-stream handler can read from a stream while another thread writes to the same stream. When a stream is opened for writing by another thread, the IMFByteStream::GetCapabilities method returns the MFBYTESTREAM_SHARE_WRITE flag.

This attribute affects source resolution. If a byte stream has the MFBYTESTREAM_SHARE_WRITE flag set, the Source Resolver will not pass that stream to a byte-stream handler unless the handler has the MF_BYTESTREAMHANDLER_ACCEPTS_SHARE_WRITE attribute set to TRUE.

The MFBYTESTREAM_SHARE_WRITE flag is a hint that the length of the stream might change while the handler is reading from it.

The GUID constant for this attribute is exported from mfuuid.lib.

Requirements

See also

Alphabetical List of Media Foundation Attributes

Scheme Handlers and Byte-Stream Handlers