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# IV file viewer
import xml.etree.ElementTree as ET
import optparse
import sys
parser = optparse.OptionParser()
parser.add_option('-n', '--number', dest='number', action='store_true', help='Show number of tracks')
parser.add_option('-g', '--groups', dest='groups', action='store_true', help='Show group names')
parser.add_option('-N', '--notes', dest='notes', action='store_true', help='Show number of notes')
parser.add_option('-M', '--notes-stream', dest='notes_stream', action='store_true', help='Show notes per stream')
parser.add_option('-m', '--meta', dest='meta', action='store_true', help='Show meta track information')
parser.add_option('--histogram', dest='histogram', action='store_true', help='Show a histogram distribution of pitches')
parser.add_option('--histogram-tracks', dest='histogram_tracks', action='store_true', help='Show a histogram distribution of pitches per track')
parser.add_option('--vel-hist', dest='vel_hist', action='store_true', help='Show a histogram distribution of velocities')
parser.add_option('--vel-hist-tracks', dest='vel_hist_tracks', action='store_true', help='Show a histogram distributions of velocities per track')
parser.add_option('-d', '--duration', dest='duration', action='store_true', help='Show the duration of the piece')
parser.add_option('-D', '--duty-cycle', dest='duty_cycle', action='store_true', help='Show the duration of the notes within tracks, and as a percentage of the piece duration')
parser.add_option('-H', '--height', dest='height', type='int', help='Height of histograms')
parser.add_option('-a', '--almost-all', dest='almost_all', action='store_true', help='Show useful information')
parser.add_option('-A', '--all', dest='all', action='store_true', help='Show everything')
parser.set_defaults(height=20)
options, args = parser.parse_args()
if options.almost_all or options.all:
options.number = True
options.groups = True
options.notes = True
options.notes_stream = True
options.histogram = True
options.vel_hist = True
options.duration = True
options.duty_cycle = True
options.meta = True
if options.all:
options.histogram_tracks= True
options.vel_hist_tracks = True
def show_hist(values, height=None):
if not values:
print '{empty histogram}'
if height is None:
height = options.height
xs, ys = values.keys(), values.values()
minx, maxx = min(xs), max(xs)
miny, maxy = min(ys), max(ys)
xv = range(minx, maxx + 1)
incs = max((maxy - miny) / height, 1)
print '\t --' + '-' * len(xv)
for ub in range(maxy + incs, miny, -incs):
print '{}\t | {}'.format(ub, ''.join(['#' if values.get(x) > (ub - incs) else ' ' for x in xv]))
print '\t |-' + '-' * len(xv)
xvs = map(str, xv)
for i in range(max(map(len, xvs))):
print '\t ' + ''.join([s[i] if len(s) > i else ' ' for s in xvs])
for fname in args:
try:
iv = ET.parse(fname).getroot()
except IOError:
import traceback
traceback.print_exc()
print 'Bad file :', fname, ', skipping...'
continue
print
print 'File :', fname
print '\t<computing...>'
if options.meta:
print 'Metatrack:',
meta = iv.find('./meta')
if len(meta):
print 'exists'
print '\tBPM track:',
bpms = meta.find('./bpms')
if len(bpms):
print 'exists'
for elem in bpms.iterfind('./bpm'):
print '\t\tAt ticks {}, time {}: {} bpm'.format(elem.get('ticks'), elem.get('time'), elem.get('bpm'))
if not (options.number or options.groups or options.notes or options.histogram or options.histogram_tracks or options.duration or options.duty_cycle):
continue
streams = iv.findall('./streams/stream')
notestreams = [s for s in streams if s.get('type') == 'ns']
if options.number:
print 'Stream count:'
print '\tNotestreams:', len(notestreams)
print '\tTotal:', len(streams)
if not (options.groups or options.notes or options.histogram or options.histogram_tracks or options.duration or options.duty_cycle):
continue
if options.groups:
groups = {}
for s in notestreams:
group = s.get('group', '<anonymous>')
groups[group] = groups.get(group, 0) + 1
print 'Groups:'
for name, cnt in groups.iteritems():
print '\t{} ({} streams)'.format(name, cnt)
if not (options.notes or options.notes_stream or options.histogram or options.histogram_tracks or options.duration or options.duty_cycle):
continue
if options.notes:
note_cnt = 0
if options.notes_stream:
notes_stream = [0] * len(notestreams)
if options.histogram:
pitches = {}
if options.histogram_tracks:
pitch_tracks = [{} for i in notestreams]
if options.vel_hist:
velocities = {}
if options.vel_hist_tracks:
velocities_tracks = [{} for i in notestreams]
if options.duration or options.duty_cycle:
max_dur = 0
if options.duty_cycle:
cum_dur = [0.0] * len(notestreams)
for sidx, stream in enumerate(notestreams):
notes = stream.findall('note')
for note in notes:
pitch = int(note.get('pitch'))
vel = int(note.get('vel'))
time = float(note.get('time'))
dur = float(note.get('dur'))
if options.notes:
note_cnt += 1
if options.notes_stream:
notes_stream[sidx] += 1
if options.histogram:
pitches[pitch] = pitches.get(pitch, 0) + 1
if options.histogram_tracks:
pitch_tracks[sidx][pitch] = pitch_tracks[sidx].get(pitch, 0) + 1
if options.vel_hist:
velocities[vel] = velocities.get(vel, 0) + 1
if options.vel_hist_tracks:
velocities_tracks[sidx][vel] = velocities_tracks[sidx].get(vel, 0) + 1
if (options.duration or options.duty_cycle) and time + dur > max_dur:
max_dur = time + dur
if options.duty_cycle:
cum_dur[sidx] += dur
if options.histogram_tracks:
for sidx, hist in enumerate(pitch_tracks):
print 'Stream {} (group {}) pitch histogram:'.format(sidx, notestreams[sidx].get('group', '<anonymous>'))
show_hist(hist)
if options.vel_hist_tracks:
for sidx, hist in enumerate(velocities_tracks):
print 'Stream {} (group {}) velocity histogram:'.format(sidx, notestreams[sidx].get('group', '<anonymous>'))
show_hist(hist)
if options.notes_stream:
for sidx, value in enumerate(notes_stream):
print 'Stream {} (group {}) note count: {}'.format(sidx, notestreams[sidx].get('group', '<anonymous>'), value)
if options.duty_cycle:
for sidx, value in enumerate(cum_dur):
print 'Stream {} (group {}) duty cycle: {}'.format(sidx, notestreams[sidx].get('group', '<anonymous>'), value / max_dur)
if options.notes:
print 'Total notes: {}'.format(note_cnt)
if options.histogram:
print 'Pitch histogram:'
show_hist(pitches)
if options.vel_hist:
print 'Velocity histogram:'
show_hist(velocities)
if options.duration:
print 'Playing duration: {}'.format(max_dur)
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