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#!/usr/bin/env python3
import os
import sys
import gi
import signal
import random
import argparse
import logging
import pyinotify
gi.require_version('Gst', '1.0')
from gi.repository import Gst, GObject, GLib
# init GObject & Co. before importing local classes
GObject.threads_init()
Gst.init([])
class Directory(object):
def __init__(self, path):
self.log = logging.getLogger('Directory')
self.path = path
self.scheduled = False
self.rescan()
self.log.debug('setting up inotify watch for %s', self.path)
wm = pyinotify.WatchManager()
notifier = pyinotify.Notifier(
wm,
timeout=10,
default_proc_fun=self.inotify_callback
)
wm.add_watch(
self.path,
# pyinotify.ALL_EVENTS,
pyinotify.IN_DELETE | pyinotify.IN_CREATE | pyinotify.IN_MODIFY,
rec=True
)
GLib.io_add_watch(
notifier._fd,
GLib.IO_IN,
self.io_callback,
notifier
)
def inotify_callback(self, notifier):
self.log.info('inotify callback %s: %s',
notifier.maskname, notifier.pathname)
if not self.scheduled:
self.scheduled = True
GLib.timeout_add(100, self.rescan)
return True
def io_callback(self, source, condition, notifier):
notifier.process_events()
while notifier.check_events():
notifier.read_events()
notifier.process_events()
return True
def is_playable_file(self, filepath):
root, ext = os.path.splitext(filepath)
return ext in ['.mp3', '.ogg', '.oga', '.wav', '.m4a',
'.flac', 'self.opus']
def rescan(self):
self.log.info('scanning directory %s', self.path)
self.scheduled = False
all_files = []
for root, dirs, files in os.walk(self.path):
files = filter(self.is_playable_file, files)
files = map(lambda f: os.path.join(root, f), files)
files = list(files)
self.log.debug('found directory %s: %u playable file(s)',
root, len(files))
all_files.extend(files)
self.log.info('found %u playable files', len(all_files))
self.files = all_files
def get_random_file(self):
return random.choice(self.files)
def get_random_uri(self):
return 'file://' + self.get_random_file()
class LoopSource(object):
def __init__(self, directory):
self.log = logging.getLogger('LoopSource')
self.directory = directory
pipeline = """
audioresample name=join !
audioconvert !
audio/x-raw,format=S16LE,channels=2,rate=48000,
layout=interleaved !
matroskamux !
tcpclientsink host=localhost port=18000
"""
# Parsing Pipeline
self.log.debug('creating pipeline\n%s', pipeline)
self.pipeline = Gst.parse_launch(pipeline)
# Selecting inital URI
inital_uri = self.directory.get_random_uri()
self.log.info('initial track %s', inital_uri)
# Create decoder-element
self.src = Gst.ElementFactory.make('uridecodebin', None)
self.src.set_property('uri', inital_uri)
self.src.connect('pad-added', self.on_pad_added)
self.pipeline.add(self.src)
# Save pad on the Join-Element
self.joinpad = self.pipeline.get_by_name('join').get_static_pad('sink')
# Binding End-of-Stream-Signal on Source-Pipeline
self.pipeline.bus.add_signal_watch()
self.pipeline.bus.connect("message::eos", self.on_eos)
self.pipeline.bus.connect("message::error", self.on_error)
self.log.debug('setting pipeline to playing')
self.pipeline.set_state(Gst.State.PLAYING)
def on_pad_added(self, src, pad):
self.log.debug('new pad on decoder, setting pad-probe')
pad.add_probe(
Gst.PadProbeType.EVENT_DOWNSTREAM | Gst.PadProbeType.BLOCK,
self.on_pad_event
)
if self.joinpad.is_linked():
self.log.debug('unlinking with joinpad')
self.joinpad.unlink(self.joinpad.get_peer())
clock = self.pipeline.get_clock()
if clock:
runtime = clock.get_time() - self.pipeline.get_base_time()
self.log.debug('setting pad offset to pipeline runtime: %sns',
runtime)
pad.set_offset(runtime)
self.log.debug('linking with joinpad')
pad.link(self.joinpad)
def on_pad_event(self, pad, info):
event = info.get_event()
self.log.debug('event %s on pad %s', event.type, pad)
if event.type == Gst.EventType.EOS:
self.log.debug('scheduling next track and dropping EOS-Event')
GObject.idle_add(self.next_track)
return Gst.PadProbeReturn.DROP
return Gst.PadProbeReturn.PASS
def next_track(self):
next_uri = self.directory.get_random_uri()
self.log.info('next track %s', next_uri)
self.src.set_state(Gst.State.READY)
self.src.set_property('uri', next_uri)
self.src.set_state(Gst.State.PLAYING)
return False
def on_eos(self, bus, message):
self.log.info('received EOS-Event on bus, exiting')
sys.exit(1)
def on_error(self, bus, message):
self.log.warning('received Error-Event on bus, exiting')
(error, debug) = message.parse_error()
self.log.warning('Error-Details: #%u: %s', error.code, debug)
sys.exit(1)
def main():
signal.signal(signal.SIGINT, signal.SIG_DFL)
parser = argparse.ArgumentParser(description='Voctocore Music-Source')
parser.add_argument('directory')
parser.add_argument('-v|-vv', '--verbose', action='count', default=0,
help="Also print INFO and DEBUG messages.")
args = parser.parse_args()
if args.verbose >= 2:
level = logging.DEBUG
elif args.verbose == 1:
level = logging.INFO
else:
level = logging.WARNING
logging.basicConfig(
level=level,
format='%(levelname)8s %(name)s: %(message)s'
)
directory = Directory(args.directory)
src = LoopSource(directory)
mainloop = GObject.MainLoop()
try:
mainloop.run()
except KeyboardInterrupt:
print('Terminated via Ctrl-C')
if __name__ == '__main__':
main()
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