[This is preliminary documentation and subject to change.]
The Video control and Video Server use the following registry keys to store information. These values are stored in subkeys of this registry key: HKLM\Software\Microsoft\TV Services\
| Name | Data Type | Description |
|---|---|---|
| "AudioPin" | String | Specifies that the video server should use a different pin name than the default. For example "CD/Aux". |
| "VBITS" | REG_DWORD | Default VBI tuning space. |
| "VBIChan" | REG_DWORD | Default VBI channel. |
| TuningSpaces\"OverScanPct" | DWORD | The overscan percentage. |
The tuning space information for each device is stored in the registry under a key named HKLM\Software\Microsoft\TV Services\TuningSpaces\<N>\, where <N> is the tuning space number.
Note Tuning space numbers are assigned sequentially as devices are installed. Because of this, the tuning space number for a device may change between installations. To get the tuning space number associated with a particular tuning space, call ITelevisionServices::TuningSpaceNumberFromName.
| Name | Data Type | Description |
|---|---|---|
| "AMFClass" | String | GUID representing the Microsoft® DirectShow™ filter class for the devices that can tune this tuning space. A device sets either this key or AMFCategory. For more information see the note at the end of this table. |
| "Description" | String | Description of the tuning space. |
| "Devices" | String | This key is not currently in use. |
| "InputType" | Binary | For analog tuners, this is the value set for the tuner input type. In other words, the value passed to IAMTVTuner::put_InputType. |
| "Loader" | String | Specifies the loader that retrieves programming guide information for this tuning space. This value points to the appropriate loader in the loaders section of the registry. |
| "MaxChannel" | Binary | The highest channel number supported by this tuning space. |
| "MediaType" | Binary | The configure auxpin for the appropriate video type. |
| "MinChannel" | Binary | The lowest channel number supported by this tuning space. |
| "Name" | String | The name of the tuning space. |
| "AMFCategory" | String | GUID of the auxpin DirectShow Filter category for devices which can tune to this tuning space. A device sets either this key or AMFClass. For more information see the note at the end of this table. |
| "PinName" | String | Name of the pin on the crossbar. |
| "PinType" | String | Type of pin on the crossbar. |
Note AMFCategory and AMFClass are mutually exclusive. If the tuner device is an old-style ring-3 filter that cannot be created from a device enumerator, it uses AMFClass. If the tuner device is a new ring-3 filter that can be enumerated from the DirectShow device enumerator or if it is a ring-0 Windows Driver Model (WDM)-proxied driver, it uses AMFCategory.
To locate additional information about DirectShow, IAMTVTuner and WDM, see Further General Information.