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Synchronous Reader Object

The synchronous reader object is used to read digital media files by using synchronous calls.

The synchronous reader object is created by the function WMCreateSyncReader, which sets a pointer to an IWMSyncReader interface. The other interfaces supported by the synchronous reader interface can be obtained by calling the QueryInterface method.

The following interfaces are supported by the synchronous reader object.

Interface Description
IWMHeaderInfo Sets and retrieves header information, such as metadata, markers, and so on.
IWMHeaderInfo2 Enumerates the available codec information. Inherits all of the methods of IWMHeaderInfo.
IWMHeaderInfo3 Supports large attribute sizes, duplicate attribute names, and multiple language support. Inherits all of the methods of IWMHeaderInfo and IWMHeaderInfo2.
IWMProfile Provides access to the profile information of the Windows Media file loaded into the reader.
IWMProfile2 Retrieves the globally unique identifier (GUID), if any, associated with the profile. Inherits all of the methods of IWMProfile.
IWMProfile3 Supports bandwidth sharing and stream prioritization information in the profile. Inherits all of the methods of IWMProfile and IWMProfile2.
IWMSyncReader Provides synchronous reading capabilities for digital media files.
IWMSyncReader2 Provides support for seeking to SMPTE time codes and for allocating samples manually. Inherits all of the methods of IWMSyncReader.

 

Related topics

Objects
Reader Object
Reading Files with the Synchronous Reader