V4L2 additions needed to document the V4L2_CAP_VIDEO_OUTPUT_POS capability (will be introduced in kernel 2.6.22):
--------------------------------- Section 4.3.1 (Querying Capabilities): add this: If the hardware supports positioning the output window, then the V4L2_CAP_VIDEO_OUTPUT_POS capability is also set. --------------------------------- Chapter 2 (Image Formats). Add the following at the end of Table 2-1 (struct v4l2_pix_format): __u32 left The left hand side of the image starts at this column. __u32 top The top of the image starts at this row. Only valid if V4L2_CAP_VIDEO_OUTPUT_POS is set, and only valid for video output. Most video output devices use the full 'video out' width and height for the output image (usually 720x576 for PAL or 720x480 for NTSC), but some can position and size the output image within that area. The area outside the image is then set to a uniform color (usually black). The driver will return the closest possible values. --------------------------------- ioctl VIDIOC_QUERYCAP, add capability to Table 2 (Device Capabilities Flags): V4L2_CAP_VIDEO_OUTPUT_POS 0x00000200 Video output can set the top, left coordinates of the video output window. _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
