IltmfPlay::IsRateSupported

#include "ltmf.h"

C Syntax

HRESULT IltmfPlay_IsRateSupported(pPlay, rate, pVal)

C++ Syntax

HRESULT IsRateSupported(rate, pVal)

IltmfPlay *pPlay;

pointer to an interface

DOUBLE rate;

playback rate

VARIANT_BOOL *pVal;

pointer to a variable

Determines whether a specific playback rate is supported or not.

Parameter Description
pPlay Pointer to an IltmfPlay interface.
rate The playback rate for which to check.
pVal Pointer to a variable to be updated with a value that indicates whether the specified playback rate is supported. Possible values are:
  Value Description
  TRUE The rate is supported.
  FALSE The rate is not supported.

Returns

S_OK

The function was successful.

<> S_OK

An error occurred. Refer to the Error Codes or the HRESULT error codes in the MediaFoundation documentation.

Comments

The playback rate is expressed as a ratio of the normal playback speed. For example, use 1.0 for normal speed, 2.0 for double speed, and 0.5 for half speed.

Required DLLs and Libraries

LTMF

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64

See Also

Elements:

IltmfPlay::get_Rate

Topics:

Media Foundation Function Group

Example

For a C++ example, refer to the IltmfPlay::IsRateSupported Example for C++.

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