diff matlab/fileplay.m @ 20:6464cf684717

Added drum analysis functions and archive of plots

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/matlab/fileplay.m	Mon Mar 12 15:51:05 2012 +0000
@@ -0,0 +1,36 @@
+% fileplay - Do plots for given file and play over MIDI channel 9
+% Data is played on kick and snare (note numbers 36 and 38).
+% Metrical grid can be played on hi-hat, cowbell etc.
+function player=fileplay(MO,file,varargin)
+	opts=prefs('vel',80,'dur',0.1,'shift',file{2},'metre',[],varargin{:});
+
+	disp(file{1});
+	BDT=shift_beat(opts.shift,read(file{1}));
+	drumplot(BDT,'bar',4,'pause',0,varargin{:});
+	player=playdrums(MO,[36,38,42,44,51,56,49,53],addmetre(opts.metre,BDT(:,[2,1,4])),opts);
+end
+
+function player=playdrums(MO,PercMap,Evs,opts)
+	NN=map(PercMap,Evs(:,1));
+	Times=(Evs(:,2)-Evs(1,2))/1000;
+	player=rendermidi(MO,window(zipmidi_abs(Times,opts.dur,9,NN,opts.vel)'),nows(MO)+1);
+end
+
+function Evs=addmetre(metre,Evs)
+	for i=1:size(metre,1)
+		Evs=add_periodic(metre(i,1),metre(i,2),Evs);
+	end
+end
+
+function X=add_periodic(m,type,Y)
+	[UMetPos,K]=unique(Y(:,3));
+	Bars=(0:m:max(UMetPos))';
+	BarTimes=interp1(UMetPos,Y(K,2),Bars);
+	Types=repmat(type,size(BarTimes));
+	X=sort_by(2,vertcat(Y,[Types,BarTimes,Bars]));
+end
+
+function X=sort_by(col,Y)
+	[dummy,K]=sort(Y(:,col));
+	X=Y(K,:);
+end