| .. -*- coding: utf-8; mode: rst -*- | |
| .. _effect: | |
| ************************ | |
| Effect Devices Interface | |
| ************************ | |
| .. note:: | |
| This interface has been be suspended from the V4L2 API. | |
| The implementation for such effects should be done | |
| via mem2mem devices. | |
| A V4L2 video effect device can do image effects, filtering, or combine | |
| two or more images or image streams. For example video transitions or | |
| wipes. Applications send data to be processed and receive the result | |
| data either with :ref:`read() <func-read>` and | |
| :ref:`write() <func-write>` functions, or through the streaming I/O | |
| mechanism. | |
| [to do] |