MatchFilename.m

function outNames = MatchFilename(parseStruct, camera,frame,channel)
    outNames = {};

    bValidStacks = checkNonemptyField(parseStruct, 'stack');
    if (bValidStacks)
        useStacks = true;
        numStacks = max(vertcat(parseStruct.stack))+1;
    else
        useStacks = false;
        numStacks = [];
    end
    
    bValidIter = checkNonemptyField(parseStruct, 'iter');
    if ( bValidIter )
        useIter = true;
    else
        useIter = false;
    end

    bValidCam = checkNonemptyField(parseStruct, 'cam');
    if ( bValidCam )
        unqCams = unique({parseStruct.cam}.');
        if (length(unqCams)>1)
            useCams = true;
        else
            if ( ~isempty(camera) && all(unqCams~=camera) )
                return
            end
            useCams = false;
        end
    else
        if ( ~isempty(camera) )
            return
        end
        useCams = false;
    end
    
    if ( useIter )
        if ( useStacks )
            iterIdx = floor((frame) / numStacks);
            stackIdx = frame - iterIdx*numStacks;
            timeMask = (vertcat(parseStruct.stack) == stackIdx) & (vertcat(parseStruct.iter) == iterIdx);
        else
            timeMask = (vertcat(parseStruct.iter) == frame);
        end
    else
        timeMask = (vertcat(parseStruct.stack) == frame);
    end
    
    name = {};
    if ( ~isempty(camera) && useCams )
        camChanMask = ( strcmpi(camera,{parseStruct.cam}.') & (vertcat(parseStruct.chan)==channel) );
        if (any(camChanMask))
            name = {parseStruct(timeMask & camChanMask).name}.';
        end
    elseif (~isempty(channel))
        chanMask = (vertcat(parseStruct.chans) == channel);
        if (any(chanMask))
            name = {parseStruct(timeMask & chanMask).name}.';
        end
    else
        name ={parseStruct(timeMask).name}.';
    end
    
    outNames = name;
end

function bNonempty = checkNonemptyField(parseStruct, fieldname)
    bNonempty = all(arrayfun(@(x)(~isempty(x.(fieldname))), parseStruct));
end