Changeset 65ebf30

Timestamp:

Mar 29, 2005, 6:12:09 PM (20 years ago)

Author:

Paul Brossier <piem@altern.org>

Branches:

feature/autosink, feature/cnn, feature/cnn_org, feature/constantq, feature/crepe, feature/crepe_org, feature/pitchshift, feature/pydocstrings, feature/timestretch, fix/ffmpeg5, master, pitchshift, sampler, timestretch, yinfft+

Children:

a4b089c

Parents:

62c6075

Message:

some gnuplot cleanup and a function to plot a sound

File:

• python/aubio/gnuplot.py (modified) (4 diffs)

python/aubio/gnuplot.py

@@ -19 +19 @@
          along with this program; if not, write to the Free Software
          Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-"""            
+"""
 
 __notesheight = 0.25
-
 
 from numarray import *
@@ -28 +27 @@
 
 def plotnote(la,title=None) :
-        if la[0,:].size() == 3:
-                d = plotnote_withends(la, plot_title=title)
-        else: 
-            # scale data if in freq (for REF.txt files)
-            if max(la[:,1] > 128 ):
-                print "scaling frequency data to midi range"
-                la[:,1] /= 6.875
-                la[:,1] = log(la[:,1])/0.6931
-                la[:,1] *= 12
-                la[:,1] -= 3
-            d = plotnote_withoutends(la, plot_title=title)
-        return d
+        if la[0,:].size() == 3:
+                d = plotnote_withends(la, plot_title=title)
+        else: 
+            # scale data if in freq (for REF.txt files)
+            if max(la[:,1] > 128 ):
+                print "scaling frequency data to midi range"
+                la[:,1] /= 6.875
+                la[:,1] = log(la[:,1])/0.6931
+                la[:,1] *= 12
+                la[:,1] -= 3
+            d = plotnote_withoutends(la, plot_title=title)
+        return d
 
 def plotnote_multi(lalist,title=None,fileout=None) :
-        d=list()
-        for i in range(len(lalist)):
-            d.append(plotnote(lalist[i], title=title))
-        return d
+        d=list()
+        for i in range(len(lalist)):
+            d.append(plotnote(lalist[i], title=title))
+        return d
        
 
 def plotnote_withends(la,plot_title=None) :
-        d=[]
-
-        x_widths = array(la[:,1]-la[:,0])/2.
-
-        d.append(Gnuplot.Data(
-                la[:,0]+x_widths,               # x centers
-                la[:,2],                        # y centers
-                x_widths,                       # x errors
-                __notesheight*ones(len(la)      # y errors
-                ),
-                title=plot_title,with=('boxxyerrorbars fs 3')))
-
-        return d
+        d=[]
+        x_widths = array(la[:,1]-la[:,0])/2.
+        d.append(Gnuplot.Data(
+                la[:,0]+x_widths,               # x centers
+                la[:,2],                        # y centers
+                x_widths,                       # x errors
+                __notesheight*ones(len(la)),    # y errors
+                title=plot_title,with=('boxxyerrorbars fs 3')))
+        return d
 
 
@@ -67 +62 @@
         """ bug: fails drawing last note """
         d=[]
-
         x_widths = array(la[1:,0]-la[:-1,0])/2;
-
         d.append(Gnuplot.Data(
                 la[:-1,0]+x_widths,             # x centers
                 la[:-1,1],                      # y centers
                 x_widths,                       # x errors
-                __notesheight*ones(len(la)-1    # y errors
-                ), 
+                __notesheight*ones(len(la)-1),  # y errors
                 title=plot_title,with=('boxxyerrorbars fs 3')))
-
         return d
 
@@ -101 +92 @@
         g.hardcopy(fileout, enhanced=1, color=0)
 
+def audio_to_array(filename):
+        import aubio.aubioclass
+        hopsize  = 2048
+        filei    = aubio.aubioclass.sndfile(filename)
+        framestep = 1/(filei.samplerate()+0.)
+        channels = filei.channels()
+        myvec    = aubio.aubioclass.fvec(hopsize,channels)
+        data = []
+        readsize = hopsize
+        while (readsize==hopsize):
+                readsize = filei.read(hopsize,myvec)
+                #for i in range(channels):
+                i = 0
+                curpos = 0
+                while (curpos < readsize):
+                        data.append(myvec.get(curpos,i))
+                        curpos+=1
+        # FIXME again for the last frame
+        curpos = 0
+        while (curpos < readsize):
+                data.append(myvec.get(curpos,i))
+                curpos+=1
+        time = arange(len(data))*framestep
+        return time,data
 
+def plot_audio(filenames, fileout=None, start=0, end=None, noaxis=None, task=audio_to_array):
+        g = Gnuplot.Gnuplot(debug=1, persist=1)
+        d = []
+        todraw = len(filenames)
+        xorig = 0.
+        xsize = 1./todraw
+        g.gnuplot('set multiplot;')
+        while (len(filenames)):
+                b,a = task(filenames.pop(0))
+                d.append(Gnuplot.Data(b,a))
+                if not noaxis and todraw==1:
+                        g.xlabel('Time (s)')
+                        g.ylabel('Amplitude')
+                g.gnuplot('set size %f,1.;' % (xsize) )
+                g.gnuplot('set origin %f,0.;' % (xorig) )
+                g.gnuplot('set style data lines; \
+                        set yrange [-1.:1.]; \
+                        set xrange [0:%f]' % b[-1]) 
+                g.plot(d.pop(0))
+                xorig += 1./todraw
+        g.gnuplot('unset multiplot;')
+        if fileout != None:
+                g.hardcopy(fileout, enhanced=1, color=0)
+