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Applications use the methods of the IDirectDrawVideoPortinterface to channel live video data from a hardware video port to a DirectDraw surface. This section is a reference to the methods of this interface.
The methods of the IDirectDrawVideoPortinterface can be organized into the following groups:
| Color controls | GetColorControls |
| SetColorControls | |
| Fields and Signals | GetFieldPolarity |
| GetVideoSignalStatus | |
| Flipping | Flip |
| SetTargetSurface | |
| Formats | GetInputFormats |
| GetOutputFormats | |
| Timing and Synchronization | GetVideoLine |
| WaitForSync | |
| Video control | StartVideo |
| StopVideo | |
| UpdateVideo | |
| Zoom factors | GetBandwidthInfo |
The IDirectDrawVideoPortinterface, like all COM interfaces, inherits the IUnknowninterface methods. The IUnknowninterface supports the following three methods:
| IUnknown | AddRef |
| QueryInterface | |
| Release |
You can use the LPDIRECTDRAWVIDEOPORTdata type to declare a variable that contains a pointer to an IDirectDrawVideoPortinterface. The Dvp.h header file declares the LPDIRECTDRAWVIDEOPORTwith the following code:
typedef struct IDirectDrawVideoPort FAR *LPDIRECTDRAWVIDEOPORT;
Requirements
| Runs on | Versions | Declared in | Link to |
|---|---|---|---|
| Windows CE OS | 2.12 or later. Version 2.12 requires DXPAK 1.0 or later. | dvp.h | ddraw.lib |