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IltmmDVDControl::IsAudioStreamEnabled

Summary

Determines if the specified audio stream in the current title is enabled.

Syntax

#include "ltmm.h"

Language	Syntax
C	HRESULT IltmmDVDControl_IsAudioStreamEnabled(pDVD, stream, pVal)
C++	HRESULT IsAudioStreamEnabled(stream, pVal)

Parameters

IltmmDVDControl *pDVD

Pointer to an IltmmDVDControl interface.

long stream

Number of the audio stream to check.

VARIANT_BOOL *pVal

Pointer to a variable that receives a value that represents the status of the specified audio stream. Possible values are:

Setting	Description
VARIANT_TRUE	Stream is enabled
VARIANT_FALSE	Stream is disabled

Returns

Value	Meaning
S_OK	The function ran successfully.
<> S_OK	An error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation.

Comments

To determine the number of available audio streams, call IltmmDVDControl::get_AudioStreamsAvailable.

Call IltmmDVDControl::get_CurrentAudioStream to retrieve the current audio stream.

To set the current audio stream, call IltmmDVDControl::put_CurrentAudioStream.

The title currently being played determines which audio streams are enabled and disabled.

While setting a disabled audio stream as the current audio stream will not return an error, the program will not produce audio until it plays a title that enables the stream.

For more detailed information, refer to the Microsoft documentation for IDvdInfo2::IsAudioStreamEnabled.

Required DLLs and Libraries

LTMM
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.

Example

Language	Example
C	IltmmDVDControl::GetButtonAtPosition
C++	IltmmDVDControl::GetButtonAtPosition

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