IDvdInfo2::GetAudioAttributes

Microsoft DirectShow 9.0

The GetAudioAttributes method retrieves the attributes of the specified audio stream in the current title or menu.

Syntax

  HRESULT GetAudioAttributes(
  ULONG ulStream,
  DVD_AudioAttributes *pATR
);

Parameters

ulStream

[in] Variable of type ULONG specifying the audio stream whose attributes you wish to query. See Remarks.

pATR

[out] Pointer to a DVD_AudioAttributes structure that is filled with the attributes of the specified audio stream.

Return Values

Returns one of the following HRESULT values.

Return code	Description
S_OK	Success.
E_UNEXPECTED	The DVD Navigator is not initialized.
VFW_E_DVD_NO_ATTRIBUTES	The stream's audio attributes are not available.
E_POINTER	Invalid argument.

Remarks

ulStream can be any index number from 0 through 7 or one of the following values:

Value	Description
DVD_DEFAULT_AUDIO_STREAM	To query for the attributes of the default audio stream.
DVD_STREAM_DATA_CURRENT	To query the current stream.
DVD_STREAM_DATA_VMGM	To query for the VMGM's audio attributes.
DVD_STREAM_DATA_VTSM	To query for the VTSM's audio attributes.

The use of this method is demonstrated in the DVDSample application in CDvdCore::GetAudioAttributes and CAudioLangDlg::GetAudioLang.

Requirements

Header: Declared in Strmif.h; include Dshow.h.

Library: Use Strmiids.lib.

See Also

Recursos adicionais