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IltmmDVDControl::IsAudioStreamEnabled

#include "ltmm.h"

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

IltmmDVDControl *pDVD;	pointer to an interface
long stream;	stream
VARIANT_BOOL *pVal;	pointer to a variable

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

Parameter	Description
pDVD	Pointer to an IltmmDVDControl interface.
stream	Number of the audio stream to check.
pVal	Pointer to a variable that receives a value that represents the status of the specified audio stream. Possible values are:
	Setting	Description
	TRUE	Stream is enabled
	FALSE	Stream is disabled

Returns

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

For a C example, refer to IltmmDVDControl::GetButtonAtPosition Example for C.

For a C++ example, refer to IltmmDVDControl::GetButtonAtPosition Example for C++.

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Elements:	IltmmDVDControl interface, IltmmDVDControl::GetAudioLanguage, IltmmDVDControl::get_CurrentAudioStream, IltmmDVDControl::put_CurrentAudioStream, IltmmDVDControl::get_AudioStreamsAvailable, IltmmDVDControl::get_DefaultAudioLanguage, IltmmDVDControl::get_DefaultAudioLanguageExt, IltmmDVDControl::SelectDefaultAudioLanguage, IltmmDVDControl::get_SubpictureOn, IltmmDVDControl::put_SubpictureOn
Topics:	Multimedia Function Group