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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', '--meta', dest='meta', action='store_true', help='Show meta track information')
parser.add_option('-h', '--histogram', dest='histogram', action='store_true', help='Show a histogram distribution of pitches')
parser.add_option('-H', '--histogram-tracks', dest='histogram_tracks', action='store_true', help='Show a histogram distribution of pitches 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('-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')
options, args = parser.parse_args()
if options.almost_all or options.all:
options.number = True
options.groups = True
options.notes = True
options.histogram = True
options.duration = True
if options.all:
options.meta = True
options.histogram_tracks= True
options.duty_cycle = True
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 meta:
print 'exists'
print '\tBPM track:',
bpms = meta.find('./bpms')
if 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.histogram or options.histogram_tracks or options.duration or options.duty_cycle):
continue
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