| Microsoft DirectX 8.1 (C++) |
The SelectAudioStream method selects the audio stream to play.
Syntax
HRESULT SelectAudioStream(
ULONG ulAudio,
DWORD dwFlags,
IDvdCmd **ppCmd
);
Parameters
ulAudio
[in] Value that specifies the audio track to use, which must be an integral value from 0 through 7, or DVD_DEFAULT_AUDIO_STREAM to specify the default stream.
dwFlags
[in] Bit flag that contains one or more DVD_CMD_FLAGS enumeration specifying command synchronization options.
ppCmd
[out] Address of a pointer to an IDvdCmd object that can be used to synchronize DVD commands.
Return Values
Returns one of the following values.
| Return code | Description |
| S_OK | Success. |
| E_INVALIDARG | ulAudio is out of range, or doesn't correspond to an audio stream. |
| E_UNEXPECTED | The ulAudio value is valid, but the DVD Navigator couldn't set it for some reason. |
| VFW_E_DVD_OPERATION_INHIBITED | UOP control prohibits the operation. |
| VFW_E_DVD_STREAM_DISABLED | The specified stream is disabled. |
Remarks
This method affects the audio of the current Video Title Set (VTS). When called from within a menu, this method sets the audio stream of the title from which the menu was called.
The following table shows the Annex J command name to which this method name corresponds, and the domains in which this method is valid.
| Annex J Command Name | Valid Domains |
| Audio_Stream_Change | DVD_DOMAIN_VideoManagerMenu DVD_DOMAIN_VideoTitleSetMenu DVD_DOMAIN_Title DVD_DOMAIN_Stop |
See Also