Hi,
[quote]
if (ioctl(hCapture->fd, VIDIOC_DQBUF, &v4l2buf) < 0) {
When ioctl called, is some DSP function will called? If will called, i think that I can get stream data in DSP. right?
[/quote]
This 'ioctl' function is used to display the captured data (through linux "v4l2" driver),
I think, You may need syslink interface, If you wish to communicate with DSP for your image processing.