Showing the changes to python (1 of 1 file). Show all
Unified · Split
| @@ -4,15 +4,15 @@ import sys · 3 unmodified lines | |||
| 4 | from aubio import pvoc, source | 4 | from aubio import pvoc, source |
| 5 | from numpy import zeros, hstack | 5 | from numpy import zeros, hstack |
| 6 | 6 | ||
| 7 | def get_waveform_plot(filename, samplerate = 0, ax = None): | 7 | def get_waveform_plot(filename, samplerate = 0, block_size = 4096, ax = None): |
| 8 | import matplotlib.pyplot as plt | 8 | import matplotlib.pyplot as plt |
| 9 | if not ax: | 9 | if not ax: |
| 10 | fig = plt.figure() | 10 | fig = plt.figure() |
| 11 | ax = fig.add_subplot(111) | 11 | ax = fig.add_subplot(111) |
| 12 | hop_s = 4096 # block size | 12 | hop_s = block_size |
| 13 | 13 | ||
| 14 | allsamples_max = zeros(0,) | 14 | allsamples_max = zeros(0,) |
| 15 | downsample = 2**3 # to plot n samples / hop_s | 15 | downsample = 2**4 # to plot n samples / hop_s |
| 16 | 16 | ||
| 17 | a = source(filename, samplerate, hop_s) # source file | 17 | a = source(filename, samplerate, hop_s) # source file |
| 18 | if samplerate == 0: samplerate = a.samplerate | 18 | if samplerate == 0: samplerate = a.samplerate |
| @@ -25,8 +25,6 @@ def get_waveform_plot(filename, samplerate = 0, ax = None): · 6 unmodified lines | |||
| 25 | allsamples_max = hstack([allsamples_max, new_maxes]) | 25 | allsamples_max = hstack([allsamples_max, new_maxes]) |
| 26 | total_frames += read | 26 | total_frames += read |
| 27 | if read < hop_s: break | 27 | if read < hop_s: break |
| 28 | print samples.reshape(hop_s/downsample, downsample).shape | ||
| 29 | |||
| 30 | allsamples_max = (allsamples_max > 0) * allsamples_max | 28 | allsamples_max = (allsamples_max > 0) * allsamples_max |
| 31 | allsamples_max_times = [ ( float (t) / downsample ) * hop_s for t in range(len(allsamples_max)) ] | 29 | allsamples_max_times = [ ( float (t) / downsample ) * hop_s for t in range(len(allsamples_max)) ] |
| 32 | 30 | ||
| @@ -34,12 +32,18 @@ def get_waveform_plot(filename, samplerate = 0, ax = None): · 1 unmodified line | |||
| 34 | ax.plot(allsamples_max_times, -allsamples_max, '-b') | 32 | ax.plot(allsamples_max_times, -allsamples_max, '-b') |
| 35 | ax.axis(xmin = allsamples_max_times[0], xmax = allsamples_max_times[-1]) | 33 | ax.axis(xmin = allsamples_max_times[0], xmax = allsamples_max_times[-1]) |
| 36 | 34 | ||
| 37 | if allsamples_max_times[-1] / float(samplerate) > 60: | 35 | set_xlabels_sample2time(ax, allsamples_max_times[-1], samplerate) |
| 36 | return ax | ||
| 37 | |||
| 38 | def set_xlabels_sample2time(ax, latest_sample, samplerate): | ||
| 39 | if latest_sample / float(samplerate) > 60: | ||
| 38 | ax.set_xlabel('time (mm:ss)') | 40 | ax.set_xlabel('time (mm:ss)') |
| 39 | ax.set_xticklabels([ "%02d:%02d" % (t/float(samplerate)/60, (t/float(samplerate))%60) for t in ax.get_xticks()[:-1]], rotation = 50) | 41 | ax.set_xticklabels([ "%02d:%02d" % (t/float(samplerate)/60, (t/float(samplerate))%60) for t in ax.get_xticks()[:-1]], rotation = 50) |
| 40 | else: | 42 | else: |
| 41 | ax.set_xlabel('time (ss.mm)') | 43 | ax.set_xlabel('time (ss.mm)') |
| 42 | ax.set_xticklabels([ "%02d.%02d" % (t/float(samplerate), 100*((t/float(samplerate))%1) ) for t in ax.get_xticks()[:-1]], rotation = 50) | 44 | ax.set_xticklabels([ "%02d.%02d" % (t/float(samplerate), 100*((t/float(samplerate))%1) ) for t in ax.get_xticks()[:-1]], rotation = 50) |
| 45 | |||
| 46 | |||
| 43 | if __name__ == '__main__': | 47 | if __name__ == '__main__': |
| 44 | import matplotlib.pyplot as plt | 48 | import matplotlib.pyplot as plt |
| 45 | if len(sys.argv) < 2: | 49 | if len(sys.argv) < 2: |