test(varargin)

% test program to continiously capture pictures from the camera
%
% try..
% >> test
%
% ... or
%
% >> test(2, 100, 100, 50, 200)

function test(varargin)

supportedModes = { ...
	'YUV444 (160x120, 30 fps)', ...
	'YUV422 (320x240, 30 fps)', ...
	'YUV411 (640x480, 30 fps)', ...
	'YUV422 (640x480, 15 fps)', ...
	'RGB8 (640x480, 15 fps)', ...
	'Y8 (640x480, 30 fps)', ...
	'Y16 (640x480, 15 fps)' ...
    };

if(isempty(varargin))
    disp('Image type not specified - using YUV as the default');
    mode = 2;			% default mode: YUV411 (640x320, 30 fps)
    myWidth  = -1;      % default width (max)
    myHeight = -1;      % default height (max)
    myOrigX  = -1;      % default origin-x (0)
    myOrigY  = -1;      % default origin-y (0)
elseif(nargin == 1 && isnumeric(varargin{1}))
    mode = varargin{1};
    myWidth  = -1;      % default width (max)
    myHeight = -1;      % default height (max)
    myOrigX  = -1;      % default origin-x (0)
    myOrigY  = -1;      % default origin-y (0)
elseif(nargin == 3 && isnumeric(varargin{1}) && isnumeric(varargin{2}) && isnumeric(varargin{3}))
    mode = varargin{1};
    myWidth  = varargin{2};
    myHeight = varargin{3};
    myOrigX  = -1;      % default origin-x (0)
    myOrigY  = -1;      % default origin-y (0)
elseif(nargin == 5 && isnumeric(varargin{1}) && isnumeric(varargin{2}) && isnumeric(varargin{3}) ...
                                             && isnumeric(varargin{4}) && isnumeric(varargin{5}))
    mode = varargin{1};
    myWidth  = varargin{2};
    myHeight = varargin{3};
    myOrigX  = varargin{4};
    myOrigY  = varargin{5};
end

if(mode == -1)
    
    % switch camera off
    capImage(-1);
    
else

    % ensure we can exit from the while(1) loop gracefully...
    figure
    evalin('base', 'run = 1;');
    set(gcf, 'CloseRequestFcn', 'evalin(''base'', ''run = 0;'');');

    run = 1;
    while(run)
        
        try
            % verbosity: on (2nd call-up parameter)
            image(capImage(mode, 1, myWidth, myHeight, myOrigX, myOrigY));
        catch
            % catch driver errors (e.g. unsupported modes)
            set(gcf, 'CloseRequestFcn', 'closereq');
            close all
            rethrow(lasterror)
        end

        % tell the user what to do (eg. ALT+F4 to exit)
        title(['MODE: ' supportedModes{mode+1} ' -- Close figure window to exit (e.g. ALT+F4)'])
        axis image
        drawnow
        
        % fetch 'run' from 'base' WS
        run = evalin('base', 'run');
        
    end

end

% switch camera off...
capImage(-1);
set(gcf, 'CloseRequestFcn', 'closereq');
close all