annotate signals/@sigarray/sigarray.m @ 61:eff6bddf82e3 tip

Finally implemented perceptual brightness thing.

classdef sigarray < signal
	properties (GetAccess=private, SetAccess=immutable)
		fs
		array
	end
	methods
		function s=sigarray(array,rate)
			if nargin<2, rate=nan; end
			s.array=array;
			s.fs=rate;
		end

		function s=tostring(sig)
			s=sprintf('sigarray(<%dx%d>)',size(sig.array,1),size(sig.array,2));
		end

		function c=channels(s), c=size(s.array,1); end
		function c=rate(s), c=s.fs; end
		function s=construct(sig)
			array=sig.array;
			ch=size(array,1);
			length=size(array,2);
			pos=0;

			s.start   = @nop;
			s.stop    = @nop;
			s.dispose = @nop;
			s.reader = @reader;

			function r=reader(n)
				r = @next;
				CHUNK = 1:uint32(n);
				function [x,rem]=next
					if pos+n<=length
						x=array(:,pos+CHUNK); rem=0; 
						pos=pos+n;
					else
						rem=n-(length-pos);
						x=[array(:,pos+1:end),zeros(ch,rem)];
						pos=length;
					end
				end
			end
		end
	end
end