| Microsoft DirectX 8.1 (C++) |
The IAMAnalogVideoDecoder interface is implemented on the WDM Video Capture filter. This interface specifies and retrieves information about the process of video digitization on a WDM-compliant video capture card. It contains methods for selecting the digitization format, indicating the horizontal lock status, and controlling the time constant on the digitizer phase lock loop (PLL).
Applications should use this interface to select and control the various aspects of video digitization, such as getting and setting the supported analog video format, determining whether the horizontal sync is locked, and retrieving other pieces of information about the digitization format.
In addition to the methods inherited from IUnknown, the IAMAnalogVideoDecoder interface exposes the following methods.
| Method | Description |
| get_AvailableTVFormats | Retrieves the currently available analog video formats. |
| put_TVFormat | Sets the current analog video format. |
| get_TVFormat | Retrieves the current analog video format. |
| get_HorizontalLocked | Determines whether the horizontal sync is locked. |
| put_VCRHorizontalLocking | Sets the condition for being connected to a VCR (changes PLL timing). |
| get_VCRHorizontalLocking | Determines whether horizontal locking has been set. |
| get_NumberOfLines | Retrieves the number of horizontal lines in the current video signal. |
| put_OutputEnable | Enables or disables the output bus. |
| get_OutputEnable | Determines whether the output bus is enabled. |