--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/classes/@miir/redesign.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,216 @@
+% REDESIGN redesign the input filter to work for the given sample rate.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DESCRIPTION: REDESIGN redesign the input filter to work for the given sample
+%              rate.
+%
+% CALL:        filt = redesign(filt, fs)
+%              filt = redesign(filt, plist-object)
+%
+% INPUT:       filt - input (miir) filter
+%              fs   - new sample rate
+%
+% OUTPUT:      filt - new output filter
+%
+% <a href="matlab:utils.helper.displayMethodInfo('miir', 'redesign')">Parameters Description</a>
+%
+% VERSION:     $Id: redesign.m,v 1.28 2011/04/08 08:56:33 hewitson Exp $
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function varargout = redesign(varargin)
+  
+  %%% Check if this is a call for parameters
+  if utils.helper.isinfocall(varargin{:})
+    varargout{1} = getInfo(varargin{3});
+    return
+  end
+  
+  import utils.const.*
+  utils.helper.msg(msg.OMNAME, 'running %s/%s', mfilename('class'), mfilename);
+  
+  %%% check numer of outputs
+  if nargout == 0
+    error('### cat cannot be used as a modifier. Please give an output variable.');
+  end
+  
+  % Collect input variable names
+  in_names = cell(size(varargin));
+  for ii = 1:nargin,in_names{ii} = inputname(ii);end
+  
+  %%% Get miir objects
+  [filt, filt_invars, rest] = utils.helper.collect_objects(varargin(:), 'miir', in_names);
+  pls = utils.helper.collect_objects(rest(:), 'plist');
+  
+  %%% Combine input plists
+  pls = combine(pls, plist());
+  
+  %%% Get 'fs' from the second input or from the input plist
+  if numel(rest) == 1 && isnumeric(rest{1})
+    fs = rest{1};
+    pls.pset('fs', fs);
+  elseif pls.nparams == 1 && pls.isparam('fs')
+    fs = pls.find('fs');
+  else
+    error('### Please specify the new sample rate.');
+  end
+  
+  %%% Redesing all filters
+  for kk = 1:numel(filt)
+    utils.helper.msg(msg.OPROC1, 're-designing filter for fs=%2.2f Hz...', fs);
+    
+    % Get the plistUsed from the constructor block (not from a copy constructor).
+    h  = filt(kk).hist;
+    lc = 1;
+    while lc<100
+      if ~strcmp(h.methodInfo.mcategory, utils.const.categories.constructor)
+        % Not a constructor block
+      else
+        % Copy constructor or a 'normal' constructor
+        if ~isempty(h.plistUsed) && (h.plistUsed.nparams > 0)
+          % Leave the loop if 'plistUsed' is filled -> Not a copy constructor
+          break;
+        end
+      end
+      if ~isempty(h.inhists)
+        h = h.inhists(1);
+      end
+      lc = lc + 1;
+    end
+    % Throw an error if no constructor block is found.
+    if ~strcmp(h.methodInfo.mcategory, utils.const.categories.constructor)
+      error('### Found no constructor block to get the plistUsed.');
+    end
+    
+    fpl  = h.plistUsed;
+    type = find(fpl, 'type');
+    pzm  = find(fpl, 'pzmodel');
+    pf   = find(fpl, 'parfrac');
+    
+    % retain the following properties of the miir object and set them at the end
+    % of the method.
+    name   = filt(kk).name;
+    iunits = filt(kk).iunits;
+    ounits = filt(kk).ounits;
+    hist   = filt(kk).hist;
+    
+    if  strcmpi(type, 'highpass')   ||...
+        strcmpi(type, 'lowpass')    ||...
+        strcmpi(type, 'bandpass')   ||...
+        strcmpi(type, 'bandreject')
+      %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+      %%%%%%%%%%                 From Standard types                 %%%%%%%%%%
+      
+      utils.helper.msg(msg.OPROC2, 're-designing standard filter.');
+      try
+        fpl = pset(fpl, 'fs', fs);
+        utils.helper.msg(msg.OPROC2, 'setting new fs.');
+      catch
+        fpl = append(fpl, 'fs', fs);
+        utils.helper.msg(msg.OPROC2, 'appending parameter fs.');
+      end
+      filt(kk) = miir(fpl);
+      
+    elseif ~isempty(pzm)
+      %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+      %%%%%%%%%%                 From pole/zero model                 %%%%%%%%%
+      
+      % REMARK: Only the history of ltpda_uoh objects are stroed in a plist and
+      %         not the object itself.
+      %         We have to rebuild the object to get the object back.
+      if isa(pzm, 'history')
+        pzm = rebuild(pzm);
+      end
+      
+      utils.helper.msg(msg.OPROC2, 're-designing pzmodel filter.');
+      fpl = pset(fpl, 'pzmodel', pzm, 'fs', fs);
+      filt(kk) = miir(fpl);
+      
+    elseif ~isempty(pf)
+      %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+      %%%%%%%%%%             From partial fraction model             %%%%%%%%%%
+      
+      % REMARK: Only the history of ltpda_uoh objects are stroed in a plist and
+      %         not the object itself.
+      %         We have to rebuild the object to get the object back.
+      if isa(pf, 'history')
+        pf = rebuild(pf);
+      end
+      
+      utils.helper.msg(msg.OPROC2, 're-designing parfrac filter.');
+      fpl = pset(fpl, 'parfrac', pf, 'fs', fs);
+      
+      out_filt = miir(fpl);
+      
+      if numel(filt) ~= numel(out_filt)
+        error('### Can redesign only one filter from a parfrac object.');
+      end
+      
+      filt = out_filt;
+      
+    else
+      warning('!!! un-recognised input filter type. Can''t redesign.');
+      continue;
+    end
+    
+    % Set the retained properties
+    filt(kk).name   = name;
+    filt(kk).iunits = iunits;
+    filt(kk).ounits = ounits;
+    
+    % Add history
+    
+    filt(kk).addHistory(getInfo('None'), pls, filt_invars(kk), hist);
+    
+  end
+  
+  %%% Set output.
+  varargout{1} = filt;
+  
+end
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%                               Local Functions                               %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% FUNCTION:    getInfo
+%
+% DESCRIPTION: Get Info Object
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function ii = getInfo(varargin)
+  if nargin == 1 && strcmpi(varargin{1}, 'None')
+    sets = {};
+    pl   = [];
+  else
+    sets = {'Default'};
+    pl   = getDefaultPlist;
+  end
+  % Build info object
+  ii = minfo(mfilename, 'miir', 'ltpda', utils.const.categories.helper, '$Id: redesign.m,v 1.28 2011/04/08 08:56:33 hewitson Exp $', sets, pl);
+  ii.setModifier(false);
+end
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% FUNCTION:    getDefaultPlist
+%
+% DESCRIPTION: Get Default Plist
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function plout = getDefaultPlist()
+  persistent pl;
+  if exist('pl', 'var')==0 || isempty(pl)
+    pl = buildplist();
+  end
+  plout = pl;
+end
+
+function pl = buildplist()
+  pl = plist.EMPTY_PLIST;
+end
+