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IMediaSeeking::GetCapabilities

  • Artículo
 
Microsoft DirectShow 9.0

IMediaSeeking::GetCapabilities

The GetCapabilities method retrieves all the seeking capabilities of the stream.

Syntax

  HRESULT GetCapabilities(
  DWORD *pCapabilities
);

Parameters

pCapabilities

[out] Pointer to a variable that receives a bitwise combination of AM_SEEKING_SEEKING_CAPABILITIES flags.

Return Values

Returns an HRESULT value. Possible values include the following.

Return code Description
S_OK Success.
E_POINTER NULL pointer argument.

Remarks

This method returns information on all the seeking capabilities of the stream. Examine pCapabilities by performing a separate bitwise-AND operation on each AM_SEEKING_SEEKING_CAPABILITIES value you are interested in.

DWORD dwCaps = 0;
pMediaSeeking->GetCapabilities(&dwCaps);

if (dwCaps & AM_SEEKING_CanGetCurrentPos) 
{
    // The stream can seek to the current position.
}
if (dwCaps & AM_SEEKING_CanPlayBackwards) 
{
    // The stream can play backward.
}

Requirements

Header: Declared in Strmif.h; include Dshow.h.

Library: Use Strmiids.lib.

See Also