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programs/management/commands/sounds_monitor.py
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228
programs/management/commands/sounds_monitor.py
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"""
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Monitor sound files; For each program, check for:
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- new files;
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- deleted files;
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- differences between files and sound;
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- quality of the files;
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It tries to parse the file name to get the date of the diffusion of an
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episode and associate the file with it; We use the following format:
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yyyymmdd[_n][_][name]
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Where:
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'yyyy' the year of the episode's diffusion;
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'mm' the month of the episode's diffusion;
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'dd' the day of the episode's diffusion;
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'n' the number of the episode (if multiple episodes);
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'name' the title of the sound;
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To check quality of files, call the command sound_quality_check using the
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parameters given by the setting AIRCOX_SOUND_QUALITY. This script requires
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Sox (and soxi).
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"""
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import os
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import re
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import subprocess
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from argparse import RawTextHelpFormatter
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from django.core.management.base import BaseCommand, CommandError
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from aircox.programs.models import *
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import aircox.programs.settings as settings
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import aircox.programs.utils as utils
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class Command (BaseCommand):
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help= __doc__
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def report (self, program = None, component = None, *content):
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if not component:
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print('{}: '.format(program), *content)
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else:
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print('{}, {}: '.format(program, component), *content)
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def add_arguments (self, parser):
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parser.formatter_class=RawTextHelpFormatter
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parser.add_argument(
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'-q', '--quality_check', action='store_true',
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help='Enable quality check using sound_quality_check on all ' \
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'sounds marqued as not good'
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)
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parser.add_argument(
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'-s', '--scan', action='store_true',
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help='Scan programs directories for changes, plus check for a '
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' matching episode on sounds that have not been yet assigned'
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)
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def handle (self, *args, **options):
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if options.get('scan'):
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self.scan()
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if options.get('quality_check'):
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self.check_quality(check = (not options.get('scan')) )
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def _get_duration (self, path):
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p = subprocess.Popen(['soxi', '-D', path], stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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out, err = p.communicate()
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if not err:
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return utils.seconds_to_time(int(float(out)))
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def get_sound_info (self, program, path):
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"""
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Parse file name to get info on the assumption it has the correct
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format (given in Command.help)
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"""
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file_name = os.path.basename(path)
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file_name = os.path.splitext(file_name)[0]
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r = re.search('^(?P<year>[0-9]{4})'
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'(?P<month>[0-9]{2})'
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'(?P<day>[0-9]{2})'
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'(_(?P<n>[0-9]+))?'
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'_?(?P<name>.*)$',
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file_name)
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if not (r and r.groupdict()):
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self.report(program, path, "file path is not correct, use defaults")
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r = {
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'name': file_name
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}
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else:
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r = r.groupdict()
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r['duration'] = self._get_duration(path)
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r['name'] = r['name'].replace('_', ' ').capitalize()
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r['path'] = path
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return r
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def find_initial (self, program, sound_info):
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"""
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For a given program, and sound path check if there is an initial
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diffusion to associate to, using the diffusion's date.
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If there is no matching episode, return None.
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"""
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# check on episodes
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diffusion = Diffusion.objects.filter(
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program = program,
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date__year = int(sound_info['year']),
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date__month = int(sound_info['month']),
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date__day = int(sound_info['day'])
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)
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if not diffusion.count():
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self.report(program, sound_info['path'],
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'no diffusion found for the given date')
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return
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return diffusion[0]
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@staticmethod
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def check_sounds (qs):
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"""
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Only check for the sound existence or update
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"""
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# check files
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for sound in qs:
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if sound.check_on_file():
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sound.save(check = False)
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def scan (self):
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"""
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For all programs, scan dirs
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"""
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print('scan files for all programs...')
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programs = Program.objects.filter()
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for program in programs:
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print('- program', program.name)
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self.scan_for_program(
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program, settings.AIRCOX_SOUND_ARCHIVES_SUBDIR,
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type = Sound.Type['archive'],
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)
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self.scan_for_program(
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program, settings.AIRCOX_SOUND_EXCERPTS_SUBDIR,
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type = Sound.Type['excerpt'],
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)
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def scan_for_program (self, program, subdir, **sound_kwargs):
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"""
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Scan a given directory that is associated to the given program, and
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update sounds information.
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"""
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print(' - scan files in', subdir)
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if not program.ensure_dir(subdir):
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return
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subdir = os.path.join(program.path, subdir)
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# new/existing sounds
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for path in os.listdir(subdir):
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path = os.path.join(subdir, path)
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if not path.endswith(settings.AIRCOX_SOUND_FILE_EXT):
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continue
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sound_info = self.get_sound_info(program, path)
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sound = Sound.objects.get_or_create(
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path = path,
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defaults = { 'name': sound_info['name'],
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'duration': sound_info['duration'] or None }
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)[0]
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sound.__dict__.update(sound_kwargs)
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sound.save(check = False)
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# initial diffusion association
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if 'year' in sound_info:
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initial = self.find_initial(program, sound_info)
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if initial:
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if initial.initial:
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# FIXME: allow user to overwrite rerun info?
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self.report(program, path,
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'the diffusion must be an initial diffusion')
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else:
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sound = initial.sounds.get_queryset() \
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.filter(path == sound.path)
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if not sound:
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self.report(program, path,
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'add sound to diffusion ', initial.id)
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initial.sounds.add(sound)
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initial.save()
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self.check_sounds(Sound.objects.filter(path__startswith = subdir))
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def check_quality (self, check = False):
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"""
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Check all files where quality has been set to bad
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"""
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import aircox.programs.management.commands.sounds_quality_check \
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as quality_check
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sounds = Sound.objects.filter(good_quality = False)
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if check:
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self.check_sounds(sounds)
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files = [ sound.path for sound in sounds if not sound.removed ]
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else:
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files = [ sound.path for sound in sounds.filter(removed = False) ]
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print('start quality check...')
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cmd = quality_check.Command()
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cmd.handle( files = files,
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**settings.AIRCOX_SOUND_QUALITY )
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print('- update sounds in database')
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def update_stats(sound_info, sound):
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stats = sound_info.get_file_stats()
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if stats:
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duration = int(stats.get('length'))
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sound.duration = utils.seconds_to_time(duration)
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for sound_info in cmd.good:
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sound = Sound.objects.get(path = sound_info.path)
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sound.good_quality = True
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update_stats(sound_info, sound)
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sound.save(check = False)
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for sound_info in cmd.bad:
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sound = Sound.objects.get(path = sound_info.path)
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update_stats(sound_info, sound)
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sound.save(check = False)
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