| Microsoft DirectX 8.1 (C++) |
Specifies the type of content in an Advanced Television System Committee (ASTC) sub-stream (component).
| Constant | Value | Description |
| CategoryNotSet | -1 | Category is not set. |
| CategoryOther | 0 | Content other than Video, Audio, Text or Data. |
| CategoryVideo | 1 | Content is Video. |
| CategoryAudio | 2 | Content is Audio |
| CategoryText | 3 | Content is Text. |
| CategoryData | 4 | Content is Data. |