20538dadc9
Original commit message from CVS: This patch fixes some issues caused by design issues in video4linux, adds some nicety to video4linux2 plugins and does some more evil stuff: * video4linux doesn't tell us which formats are supported by a card, so the only way to know this is by simply trying it out. This patch adds that. * v4lmjpegsink didnt have a bufferpool yet - is integrated now. * all copy() bufferpool functions have been removed since they're not needed. * v4lmjpegsink doesnt have a free() function, because hen playing the frames, all this is already handled. When the frame is not played, nothing has to be done. In total, the function is not needed. * adds a get_caps() function to v4l2src * some minor crap
General Idea:
=============
_____/ gstv4lsrc.[ch]
_____/ \ v4lsrc_calls.[ch]
/
gstv4lelement.[ch] _/____________/ gstv4lmjpegsrc.[ch]
v4l_calls.[ch] \ \ v4lmjpegsrc_calls.[ch]
\_____
\_____/ gstv4lmjpegsink.[ch]
\ v4lmjpegsink_calls.[ch]
I.e., all the files on the right are child classes of
the v4lelement 'parent' on the left.
* v4lelement handles generic v4l stuff (picture settings,
audio, norm/input setting, open()/close())
* v4lsrc, v4lmjpegsrc handle the capture specific
functions. Maybe we'd need a v4lmpegsrc too
* v4lmjpegsink handles mjpeg hardware playback of video
Useful Documentation:
=====================
MJPEG/V4L API : ./videodev_mjpeg.h
V4L API : /usr/include/linux/videodev.h or
http://roadrunner.swansea.uk.linux.org/v4l.shtml
V4L2 API : http://www.thedirks.org/v4l2/
BSD/Meteor API: /usr/include/machine/ioctl_meteor.h
mjpegtools : http://www.sourceforge.net/projects/mjpeg