IMediaObject::Discontinuity method (mediaobj.h)

Article
4/26/2023

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The Discontinuity method signals a discontinuity on the specified input stream.

Syntax

HRESULT Discontinuity(
  DWORD dwInputStreamIndex
);

Parameters

dwInputStreamIndex

Zero-based index of an input stream on the DMO.

Return value

Returns an HRESULT value. Possible values include those in the following table.

Return code	Description
DMO_E_INVALIDSTREAMINDEX	Invalid stream index
DMO_E_NOTACCEPTING	The DMO is not accepting input.
DMO_E_TYPE_NOT_SET	The input and output types have not been set.
S_OK	Success

Remarks

A discontinuity represents a break in the input. A discontinuity might occur because no more data is expected, the format is changing, or there is a gap in the data. After a discontinuity, the DMO does not accept further input on that stream until all pending data has been processed. The application should call the IMediaObject::ProcessOutput method until none of the streams returns the DMO_OUTPUT_DATA_BUFFERF_INCOMPLETE flag.

This method might fail if it is called before the client sets the input and output types on the DMO.

Requirements

Requirement	Value
Target Platform	Windows
Header	mediaobj.h (include Dmo.h)
Library	Dmoguids.lib

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