Massive refactoring

[mpd-goodies.git] / bin / mfade

diff --git a/bin/mfade b/bin/mfade
new file mode 100755 (executable)
index 0000000..61a68f3
--- /dev/null
+++ b/bin/mfade
@@ -0,0 +1,146 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2009,2010,2012,2019 kaliko <kaliko@azylum.org>
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+"""
+DOC:
+    heavily borrowed from perl script mpdtoys and converted to python.
+    mpdtoys © 2007 Joey Hess <joey@kitenet.net>
+    http://kitenet.net/~joey/code/mpdtoys
+"""
+
+import argparse
+import sys
+
+from time import sleep
+from os.path import basename
+
+import musicpd
+
+
+VERSION = '0.2'
+DESC = """Fade in/out to <final volume level> over <time>.
+Defaults are from 0% to 50% when paused or stopped 
+and from current volume to 10th of it if playing,
+both over 10 minutes."""
+DESC = """Fade in/out to <final volume level> over <time>.
+Defaults are from 0% to 50% when paused or stopped and from current volume to 10th of it if playing, both over 10 minutes."""
+EPILOG = """You might need to set your audio_output with "always_on yes" for
+this command to work properly.
+
+Set MPD host/port in env. var"""
+
+class Sleep(musicpd.MPDClient):
+    """"""
+    script_info = dict({
+        'prog': basename(__file__),
+        'description': DESC,
+        'epilog': EPILOG,
+        'formatter_class': argparse.RawDescriptionHelpFormatter,
+    })
+
+    def __init__(self):
+        """"""
+        musicpd.MPDClient.__init__(self)
+        self.tempo = 600
+        self.volum = None
+        self._get_args()
+        self._run()
+
+    def _test_volume_access(self):
+        status = self.status()
+        if 'volume' not in status:
+            print('Mixer not available!')
+            print('Try to set the always_on audio_output option on.')
+            sys.exit(1)
+
+    def _get_args(self):
+        """"""
+        parser = argparse.ArgumentParser(**self.__class__.script_info)
+        parser.add_argument('--version', action='version',
+                            version='v%s' % VERSION)
+        group = parser.add_mutually_exclusive_group()
+        group.add_argument('-m', '--minutes', type=int,
+                           help='duration to fade in/out over')
+        group.add_argument('-s', '--seconds', type=int,
+                           help='duration to fade in/out over')
+        parser.add_argument('volume', type=int, nargs='?',
+                            help='final volume level')
+        args = parser.parse_args()
+        if args.minutes:
+            self.tempo = args.minutes*60
+        if args.seconds:
+            self.tempo = args.seconds
+        if args.volume:
+            self.volum = args.volume
+
+    def _run(self):
+        """"""
+        self.connect()
+        self.mpd_state = str(self.status().get('state'))
+        if self.mpd_state == 'play':
+            self.mpd_vol = int(self.status().get('volume'))
+            if not self.volum:
+                self.volum = self.mpd_vol // 10
+            if self.volum > self.mpd_vol:
+                print('Error: specified min volume (%d%%) > to current volume (%d%%)' % (
+                    self.volum, self.mpd_vol))
+                sys.exit(1)
+            print('fading down from %d%% to %d%% over %ss' % (self.mpd_vol, self.volum, self.tempo), file=sys.stdout)
+            if self.fade(self.mpd_vol, self.volum):
+                self.stop()
+        elif self.mpd_state in ['stop', 'pause']:
+            self._test_volume_access()
+            if not self.volum:
+                self.volum = int(50)
+            print('fading up from 0%% to %d%% over %ss' % (self.volum, self.tempo), file=sys.stdout)
+            self.mpd_vol = 0
+            self.setvol(0)
+            self.play()
+            self.fade(self.mpd_vol, self.volum)
+
+    def fade(self, mpd_vol, target):
+        """"""
+        # TODO: handle possible lost connections
+        span = target - mpd_vol
+        step = span / (10*self.tempo)
+        vol = mpd_vol
+        if step == 0:
+            return True
+        while True:
+            if int(vol) != int(self.status().get('volume')):
+                sys.stderr.write(
+                    'Warning: external volume change, aborting!\n')
+                return False
+            vol += step
+            self.setvol(int(vol))
+            if abs(vol - target) < 1.1*abs(step):
+                self.setvol(target)
+                return True
+            sleep(.1)
+
+
+# Script starts here
+if __name__ == '__main__':
+    try:
+        Sleep()
+    except KeyboardInterrupt:
+        sys.stdout.write('exit')
+
+# VIM MODLINE
+# vim: ai ts=4 sw=4 sts=4 expandtab