comparison aux/batchResample.m @ 2:5e72201496c8

Bug fixes, added stripzeros function, added new loudness function, moved general documentation to top level, MATLAB_R2014b compatibility

-function [] = batchResample(foldername, fsnew, bitDepth)
-% BATCH RESAMPLE converts sample rate of all files in folder. 
-%
+function [] = batchresample(foldername, fsnew, bitdepthnew)
+% BATCHRESAMPLE converts sample rate of all files in folder. 
+% 
 % by Brecht De Man at Centre for Digital Music on 13 April 2014
 
-% TODO read sampling rate without reading whole file
+    if nargin < 2
+        fsnew = 96000; 
+    end
 
-    if nargin <3
-        bitDepth = 24;
+    if nargin < 3
+        bitdepthnew = 24;
     end
 
     currentfolder = pwd;
     cd(foldername); % go to specified folder
     % go over all wav files in this folder

     % remove hidden files from list
     % see http://www.mathworks.co.uk/matlabcentral/newsreader/view_thread/258220
     for k = length(files):-1:1
         fname = files(k).name;
         if fname(1) == '.'
-            files(k) = [ ];
+            files(k) = [];
         end
     end
 
     for k=1:length(files)
-            disp(['Reading ' files(k).name '...']);
-
-            [audio,fs] = audioread(files(k).name); % read audio
+            info     = audioinfo(files(k).name); 
+            bitdepth = info.BitsPerSample; 
+            fs       = info.SampleRate; 
             
-            if fs==fsnew
-                warning('Sampling rate of original audio file is equal to current sampling rate');
+            if fs==fsnew && bitdepth == bitdepthnew
+                disp([files(k).name ' already at ' num2str(fs) ' Hz, ' num2str(bitdepth) ' bit.']);
             else
-                resampledAudio = resample(audio, fsnew, fs);
-                audiowrite([files(k).name],resampledAudio, fsnew, 'BitsPerSample', bitDepth);
+                [audio,fs] = audioread(files(k).name); % read audio
+                disp([files(k).name ' was ' num2str(fs) ' Hz, ' num2str(bitdepth) ' bit.']);
+                if fs ~= fsnew
+                    audio = resample(audio, fsnew, fs);
+                end
+                audiowrite([files(k).name], audio, fsnew, ...
+                    'BitsPerSample', bitdepthnew);
             end
     end
+    
     cd(currentfolder); % go back to original folder
 
 end