From 813480d439488de2e1d5abe12a076c2b0140fd8f Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Fri, 20 Jun 2014 16:03:31 +0200 Subject: add alsa plugin MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- src/plugins/alsa.py | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 src/plugins/alsa.py (limited to 'src') diff --git a/src/plugins/alsa.py b/src/plugins/alsa.py new file mode 100644 index 0000000..35d23c4 --- /dev/null +++ b/src/plugins/alsa.py @@ -0,0 +1,101 @@ +# -*- python -*- +''' +xpybar – xmobar replacement written in python +Copyright © 2014 Mattias Andrée (maandree@member.fsf.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 . +''' + +import alsaaudio + + +class ALSA: + ''' + ALSA volume controller + + @variable cardindex:int The index of the audio card + @variable cardname:str The name of the audio card + @variable mixername:str The name of the mixer + @variable mixer:alsaaudio.Mixer The mixer object used internally by this class + ''' + + + ALL_CHANNELS = -1 + ''' + :int Channel index that selects all available channels + ''' + + + def __init__(self, cardindex = 0, mixername = 'Master'): + ''' + Constructor + + @param cardindex:int The index of the audio card + @param mixername:str The name of the mixer + ''' + self.cardindex = cardindex + self.cardname = alsaaudio.cards()[cardindex] + self.mixername = mixername + self.mixer = alsaaudio.Mixer(self.mixername, 0, self.cardindex) + + + def get_volume(self): + ''' + Get the volume for each channel on the mixer + + @return :list The [0, 100] volume for each channel, `None` on a channel indicate that it is muted + ''' + self.mixer = alsaaudio.Mixer(self.mixername, 0, self.cardindex) + vs = self.mixer.getvolume() + try: + ms = self.mixer.getmute() + except: + ms = [0] * len(vs) + return [v if m == 0 else None for (v, m) in zip(vs, ms)] + + + def set_volume(self, volume, channel = -1): + ''' + set the volume for a channel on the mixer + + @param volume:int? The [0, 100] volume for the channel, `None` to mute the channel + @param channel:int The index of the channel, `ALSA.ALL_CHANNELS` (-1) for all channels + ''' + if volume is None: + self.mixer.setmute(1, channel) + else: + self.mixer.setvolume(volume, channel) + self.mixer.setmute(0, channel) + + + @staticmethod + def get_cards(): + ''' + Get the names of all available audio cards + + @return :list The names of all available audio cards + ''' + return alsaaudio.cards() + + + @staticmethod + def get_mixers(cardindex = 0): + ''' + Get the names of all available mixers for an audio card + + @param cardindex:int The index of the audio card + @return :list The names of all available mixers for an audio card + ''' + return alsaaudio.mixers(cardindex) + -- cgit v1.2.3-70-g09d2