Microsoft DirectX 8.0 |
Describes the strategy that the Overlay Mixer filter uses to scale the video image down to a smaller size.
Syntax
typedef enum { DECIMATION_LEGACY, DECIMATION_USE_DECODER_ONLY, DECIMATION_USE_VIDEOPORT_ONLY, DECIMATION_USE_OVERLAY_ONLY, DECIMATION_DEFAULT } DECIMATION_USAGE;
Elements
- DECIMATION_LEGACY
- Decimate the video by taking the following steps, in the order listed, until one of them succeeds.
- Try to use the overlay scaler on the VGA chip.
- If the Overlay Mixer is connected through a video port, try to use the scaler on the video port.
- Crop the video image.
- DECIMATION_USE_DECODER_ONLY
- Decimate using the scaler on the video decoder. If that fails, crop the video image.
- DECIMATION_USE_VIDEOPORT_ONLY
- Decimate using the scaler on the video port. If that fails, crop the video image.
- DECIMATION_USE_OVERLAY_ONLY
- Decimate using the overlay scaler on the VGA chip. If that fails, crop the video image.
- DECIMATION_DEFAULT
- Decimate the video by taking the following steps, in the order listed, until one of them succeeds.
This mode is the default decimation strategy.
- Try to use the scaler on the video decoder.
- Try to use the overlay scaler on the VGA chip.
- If the Overlay Mixer is connected through a video port, try to use the scaler on the video port.
- Crop the video image.
See Also