| Microsoft DirectX 9.0 SDK Update (Summer 2004) |
IDirectMusicTrack8::PlayEx
The PlayEx method causes the track to play in clock time. It performs any work that the track must do when the segment is played, such as creating and sending messages.
Syntax
HRESULT PlayEx(
void* pStateData,
REFERENCE_TIME rtStart,
REFERENCE_TIME rtEnd,
REFERENCE_TIME rtOffset,
DWORD dwFlags,
IDirectMusicPerformance* pPerf,
IDirectMusicSegmentState* pSegSt,
DWORD dwVirtualID
);
Parameters
pStateData
Pointer to state data from the IDirectMusicTrack8::InitPlay method. The format and use of the data is specific to the track.
rtStart
Start time.
rtEnd
End time.
rtOffset
Offset to add to all messages sent to IDirectMusicPerformance8::SendPMsg.
dwFlags
Flags that indicate the state of this call. See DMUS_TRACKF_FLAGS. A value of 0 indicates that this call to PlayEx continues playback from the previous call.
pPerf
Performance used to allocate and send messages.
pSegSt
Segment state that this track belongs to. The IDirectMusicSegmentState8::QueryInterface method can be called to obtain an IDirectMusicGraph8 interface—for instance, to call IDirectMusicGraph8::StampPMsg.
dwVirtualID
Virtual identifier of the track. This value must be put in the dwVirtualTrackID member of any message (see DMUS_PMSG) that is sent by IDirectMusicPerformance8::SendPMsg.
Return Values
If the method succeeds, the return value can be S_OK or DMUS_S_END.
If it fails, the method can return one of the error values shown in the following table.
| Return code |
| DMUS_E_NOT_INIT |
| E_POINTER |
Requirements
Header: Declared in dmplugin.h.
See Also
© 2004 Microsoft Corporation. All rights reserved.