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luvcview: SDL-based video grabber
=================================

Copyright and license
---------------------

Copyright (C) 2005-2008 Michel Xhaard

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


Credits
-------

Original code from spcaview: Copyright (C) 2003-2006 Michel Xhaard
AVI writing code from Avilib: Copyright (C) 1999 Rainer Johanni
SDL (Simple DirectMedia Layer)

Contributions by:
	Laurent Pinchart, Linux UVC driver (http://linux-uvc.berlios.de/)
	Martin Rubli, Logitech (http://www.quickcamteam.net/)
	... and many others whose names are in the ChangeLog.


Download and support
--------------------

Currently luvcview does not have an official website but the preferred way of
posting questions and feedback is through the QuickCam Team forums:
	http://forums.quickcamteam.net/forumdisplay.php?fid=6

The latest version can be found in the Subversion repository at:
	http://svn.quickcamteam.net/svn/luvcview/

The current maintainer of luvcview is Michel Xhaard <[email protected]>.


Disclaimer
----------

Use this program as you see fit. We are not liable for damages or illegal use
of it whatsoever. You are on your own. Use of this code is at your own risk.
There is absolutely no warranty. Have fun with it!


Building
--------

Required libraries:
- SDL (from http://www.libsdl.org/ or e.g. the libsdl2-2.0 Debian package)

Required header files:
- SDL (from http://www.libsdl.org/ or e.g. the libsdl2-dev Debian package)
- uvcvideo (Linux UVC driver)
- uvcdynctrl (part of libwebcam)

The JPEG encoder and decoder are now part of the package to allow for a small
footprint on embedded devices. libsdl provides the necessary layers to run on
the Linux framebuffer or an X server.

Important notes on the uvcvideo and uvcdynctrl dependencies:

	Compiling the luvcview sources requires three source files to be present.
	If you already have these projects on your system, you can link them, e.g.
	using the following commands:

	ln -s ~/uvcvideo/trunk/uvcvideo.h
	ln -s ~/uvcvideo/trunk/uvc_compat.h
	ln -s ~/libwebcam/Common/include/dynctrl-logitech.h

	Alternatively, the latest versions can be downloaded directly from the
	corresponding source code repositories:

	wget http://svn.berlios.de/svnroot/repos/linux-uvc/linux-uvc/trunk/uvcvideo.h
	wget http://svn.berlios.de/svnroot/repos/linux-uvc/linux-uvc/trunk/uvc_compat.h
	wget http://svn.quickcamteam.net/svn/qct/Linux/Common/include/dynctrl-logitech.h

Once you have the SDL headers installed and the three above header files in the
luvcview source directory you can continue as normal.

To compile luvcview simply type:

make

To install it in /usr/local/bin type (as root):

make install


Usage
-----

Run luvcview with the -h or --help command line options to get a list of
supported command line options.

In the GUI the following keys are supported:
	{SDLK_n, A_BRIGHTNESS_UP},
	{SDLK_b, A_BRIGHTNESS_DOWN},
	{SDLK_x, A_CONTRAST_UP},
	{SDLK_w, A_CONTRAST_DOWN},
	{SDLK_c, A_SATURATION_UP},
	{SDLK_v, A_SATURATION_DOWN},
	{SDLK_z, A_GAIN_UP},
	{SDLK_a, A_GAIN_DOWN},
	{SDLK_r, A_SHARPNESS_UP},
	{SDLK_e, A_SHARPNESS_DOWN},
	{SDLK_y, A_CUSTOM_A},
	{SDLK_t, A_CUSTOM_B},
	{SDLK_f, A_SWITCH_LIGHTFREQFILT},
	{SDLK_s, A_SCREENSHOT},
	{SDLK_p, A_RECORD_TOGGLE},
	{SDLK_l, A_RESET},
	{SDLK_q, A_QUIT},
	{SDLK_F1, A_SAVE}, // save configuration
	{SDLK_F2, A_LOAD}, // restore configuration