| Microsoft DirectX 8.1 (C++) |
The IAMTVTuner interface is implemented on the TV Tuner filter. This interface inherits from IAMTuner interface and provides methods that enable an application to control a TV tuner device. The interface supports tuners for analog broadcast television and AM/FM radio.
IAMTVTuner supports tuners with multiple input pins, to allow for multiple devices and multiple transmission types.
IAMTVTuner maps TV channels to specific frequencies through the IAMTuner::put_Channel and IAMTVTuner::AutoTune methods. These methods handle the details of the conversion so that the hardware driver receives an exact frequency. The TV Tuner filter supports worldwide tuning coverage.
Use this interface from an application to set TV channels and to get or set information about their frequencies, and to determine what analog video standards your TV tuner card supports. For more information, see Writing Applications for WDM Analog TV Devices.
In addition to the methods inherited from IDispatch and IAMTuner, the IAMTVTuner interface exposes the following methods.
| Method | Description |
| get_AvailableTVFormats | Retrieves all the analog video TV standards that the tuner supports. |
| get_TVFormat | Retrieves the current analog video TV standard in use. |
| AutoTune | Scans for a precise signal on the channel's frequency. |
| StoreAutoTune | Saves the fine-tuning information for all channels. |
| get_NumInputConnections | Retrieves the number of TV sources plugged into the tuner filter. |
| put_InputType | Sets the tuner input type (cable or antenna). |
| get_InputType | Retrieves the input type. |
| put_ConnectInput | Sets the hardware tuner input connection. |
| get_ConnectInput | Retrieves the hardware tuner input connection. |
| get_VideoFrequency | Retrieves the current video frequency. |
| get_AudioFrequency | Retrieves the current audio frequency. |
See Also