samer@0: function [span,jump]=windowparams(sz,frame,hop,width,opts)
samer@0: % windowparams - compute windowing parameters to get buffers of a certain size
samer@0: %
samer@0: % windowparams :: 
samer@0: %    [[1,2]]     ~ 'size of signal [channels,length]',
samer@0: %    natural	 ~ 'desired frame length',
samer@0: %    natural    ~ 'desired hop per frame',
samer@0: %    natural|[] ~ 'desired number of frames per buffer or [] for all',
samer@0: %    options {
samer@0: %       natural : jump/[] ~'override window jump'
samer@0: %    }
samer@0: % -> natural    ~ 'recommended window span',
samer@0: %    natural    ~ 'recommended window jump'.
samer@0: 
samer@0: 	channels = sz(1);
samer@0: 	length   = sz(2);
samer@0: 
samer@0: 	if isempty(width) 
samer@0: 		width=channels*(floor((length-frame)/hop)+1); 
samer@0: 	end
samer@0: 
samer@0: 	span = (hop*(width-1)+frame)/channels;	
samer@0: 	jump = (hop*width)/channels;
samer@0: 
samer@0: 	if nargin>4 && isfield(opts,'jump'), jump = channels*hop*opts.jump; end
samer@0: 
samer@0: