The portion of the file holding the audio data. The audio data might be compressed to save disk space. The data has to be decompressed using an audio decompressor before you can play (hear) it.

oftware component which decompresses audio. It must be designed to work with ACM or DirectShow. Note that different compression methods require different decompressors. There is no universal decompressor capable of decoding all compressed streams.

The name for a group of related video files (called "Chapters") on your DVD. For example, for a DVD called "My Summer Vacation," you might have the titles "Water Skiing," "New Friends," and "Hiking." For each of those titles, you might have one or more different video files.

IltmmDVDControl::IsAudioStreamEnabled

Show in webframe

#include "ltmm.h"

C Syntax	HRESULT IltmmDVDControl_IsAudioStreamEnabled(pDVD, Stream, pEnabled)
C++ Syntax	HRESULT IsAudioStreamEnabled(Stream, pEnabled)

IltmmDVDControl *pDVD;	/* pointer to an interface */
long Stream;	/* stream */
VARIANT_BOOL *pEnabled;	/* 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.
pEnabled	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

See Also

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

Example

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

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