Microsoft DirectX 8.0

DVD Karaoke Property Set

When the DVD Navigator filter goes into karaoke mode, it informs the audio decoder through the AM_PROPERTY_DVDKARAOKE_ENABLE property. The decoder should then mute audio channels 2 through 5 until it receives from the DVD Navigator an AM_PROPERTY_DVDKARAOKE_DATA property with a pointer to an AM_DvdKaraokeData data structure indicating how the auxiliary channels are to be mixed.

AM_PROPERTY_DVDKARAOKE

DVD Karaoke Property Set

Syntax

typedef enum {
    AM_PROPERTY_DVDKARAOKE_ENABLE = 0,  // BOOL
    AM_PROPERTY_DVDKARAOKE_DATA = 1,
} AM_PROPERTY_DVDKARAOKE;

Elements

AM_PROPERTY_DVDKARAOKE_ENABLE
The DVD Navigator sends the decoder an AM_PROPERTY_DVDKARAOKE_ENABLE with a value of true to enable karaoke downmixing or false to disable it.
AM_PROPERTY_DVDKARAOKE_DATA
The DVD Navigator sends the decoder an AM_PROPERTY_DVDKARAOKE_DATA property with a pointer to an AM_DvdKaraokeData structure to change the downmix configuration; that is, to turn certain karaoke channels on or off and direct them to the right or left output channel.

AM_DvdKaraokeData

DVD Karaoke Property Set

Syntax

typedef struct tagAM_DvdKaraokeData
{
    DWORD   dwDownmix; 
    DWORD   dwSpeakerAssignment;
} AM_DvdKaraokeData;

Members

dwDownmix
A bitwise OR of DVD_KARAOKE_DOWNMIX flags telling the decoder which channels are downmixed to channels 0 or 1.
dwSpeakerAssignment
A valid DVD_KARAOKE_ASSIGNMENT value that indicates which speakers the output is going to.

See Also

SelectKaraokeAudioPresentationMode