/usr/share/pyshared/freevo/plugins/mixer.py is in python-freevo 1.9.2b2-4.2.
This file is owned by root:root, with mode 0o644.
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# -----------------------------------------------------------------------
# mixer.py - The mixer interface for freevo.
# -----------------------------------------------------------------------
# $Id: mixer.py 11905 2011-11-14 21:54:46Z adam $
#
# Notes:
# Todo:
#
# -----------------------------------------------------------------------
# Freevo - A Home Theater PC framework
# Copyright (C) 2002 Krister Lagerstrom, et al.
# Please see the file freevo/Docs/CREDITS for a complete list of authors.
#
# 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 2 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 MER-
# CHANTABILITY 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, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# -----------------------------------------------------------------------
"""
For manipulating the mixer.
"""
import logging
logger = logging.getLogger("freevo.plugins.mixer")
import fcntl
import struct
import os
import config
import rc
import plugin
from event import *
import dialog
def i32(x): return (x&0x80000000L and -2*0x40000000 or 0) + int(x&0x7fffffff)
class PluginInterface(plugin.DaemonPlugin):
"""
Mixer for Freevo
"""
# These magic numbers were determined by writing a C-program using the
# macros in /usr/include/linux/... and printing the values.
# They seem to work on my machine. XXX Is there a real python interface?
SOUND_MIXER_WRITE_VOLUME = 0xc0044d00
SOUND_MIXER_WRITE_PCM = 0xc0044d04
SOUND_MIXER_WRITE_LINE = 0xc0044d06
SOUND_MIXER_WRITE_MIC = 0xc0044d07
SOUND_MIXER_WRITE_RECSRC = 0xc0044dff
SOUND_MIXER_LINE = 7
SOUND_MASK_LINE = 64
def __init__(self):
self.mixfd = None
self.muted = 0
# If you're using ALSA or something and you don't set the mixer,
# why are we trying to open it?
if config.MIXER_DEVICE:
try:
self.mixfd = open(config.MIXER_DEVICE, 'r')
except IOError:
self.reason = 'Couldn\'t open mixer %s' % config.MIXER_DEVICE
return
# init here
plugin.DaemonPlugin.__init__(self)
self.plugin_name = 'MIXER'
self.default_step = config.MIXER_VOLUME_STEP
if 0:
self.mainVolume = 0
self.pcmVolume = 0
self.lineinVolume = 0
self.micVolume = 0
self.igainVolume = 0 # XXX Used on SB Live
self.ogainVolume = 0 # XXX Ditto
if self.mixfd:
data = struct.pack('L', self.SOUND_MASK_LINE)
try:
fcntl.ioctl(self.mixfd.fileno(), i32(self.SOUND_MIXER_WRITE_RECSRC), data)
except IOError, why:
_debug_('Cannot set mixer "%s" line mask: %s' % (config.MIXER_DEVICE, why), DWARNING)
if config.MIXER_MAJOR_CTRL == 'VOL':
self.setMainVolume(config.MIXER_VOLUME_DEFAULT)
if config.MIXER_CONTROL_ALL:
self.setPcmVolume(config.MIXER_VOLUME_MAX)
# XXX This is for SB Live cards should do nothing to others
# XXX Please tell if you have problems with this.
self.setOgainVolume(config.MIXER_VOLUME_MAX)
elif config.MIXER_MAJOR_CTRL == 'PCM':
self.setPcmVolume(config.MIXER_VOLUME_DEFAULT)
if config.MIXER_CONTROL_ALL:
self.setMainVolume(config.MIXER_VOLUME_MAX)
# XXX This is for SB Live cards should do nothing to others
# XXX Please tell if you have problems with this.
self.setOgainVolume(config.MIXER_VOLUME_MAX)
else:
_debug_('No appropriate audio channel found for mixer', DWARNING)
if config.MIXER_CONTROL_ALL:
self.setLineinVolume(0)
self.setMicVolume(0)
def eventhandler(self, event=None, menuw=None, arg=None):
"""
eventhandler to handle the VOL events
"""
if event in (MIXER_VOLUP, MIXER_VOLDOWN):
step = event.arg
if not isinstance(step, int):
_debug_('%s event type "%s" is not "int"' % (event, step), DWARNING)
step = self.default_step
if event == MIXER_VOLUP:
if config.MIXER_MAJOR_CTRL == 'VOL':
self.incMainVolume(step)
elif config.MIXER_MAJOR_CTRL == 'PCM':
self.incPcmVolume(step)
dialog.show_volume(self.getVolume(), False)
rc.post_event(Event('MIXER_VOLUME_INFO', arg='%s' % self.getVolume()))
return True
elif event == MIXER_VOLDOWN:
if config.MIXER_MAJOR_CTRL == 'VOL':
self.decMainVolume(step)
elif config.MIXER_MAJOR_CTRL == 'PCM':
self.decPcmVolume(step)
dialog.show_volume(self.getVolume(), False)
rc.post_event(Event('MIXER_VOLUME_INFO', arg='%s' % self.getVolume()))
return True
elif event == MIXER_MUTE:
if self.getMuted() == 1:
rc.post_event(Event('MIXER_VOLUME_INFO', arg='%s' % self.getVolume()))
self.setMuted(0)
else:
rc.post_event(Event('MIXER_MUTE_INFO'))
self.setMuted(1)
dialog.show_volume(self.getVolume(), self.getMuted())
return True
return False
def _setVolume(self, request, volume):
if self.mixfd:
if volume < 0:
volume = 0
if volume > 100:
volume = 100
vol = (volume << 8) | (volume)
data = struct.pack('L', vol)
try:
fcntl.ioctl(self.mixfd.fileno(), i32(request), data)
except IOError, why:
_debug_('Cannot set mixer "%s" volume: %s' % (config.MIXER_DEVICE, why), DWARNING)
def getMuted(self):
return(self.muted)
def setMuted(self, mute):
self.muted = mute
if config.MIXER_MAJOR_CTRL == 'VOL':
if mute == 1:
self._setVolume(self.SOUND_MIXER_WRITE_VOLUME, 0)
else:
self._setVolume(self.SOUND_MIXER_WRITE_VOLUME, self.mainVolume)
elif config.MIXER_MAJOR_CTRL == 'PCM':
if mute == 1:
self._setVolume(self.SOUND_MIXER_WRITE_PCM, 0)
else:
self._setVolume(self.SOUND_MIXER_WRITE_PCM, self.pcmVolume)
def getVolume(self):
if config.MIXER_MAJOR_CTRL == 'VOL':
return self.mainVolume
elif config.MIXER_MAJOR_CTRL == 'PCM':
return self.pcmVolume
def getMainVolume(self):
return(self.mainVolume)
def setMainVolume(self, volume):
self.mainVolume = volume
self._setVolume(self.SOUND_MIXER_WRITE_VOLUME, self.mainVolume)
def incMainVolume(self, step=5):
self.mainVolume += step
if self.mainVolume > 100:
self.mainVolume = 100
self._setVolume(self.SOUND_MIXER_WRITE_VOLUME, self.mainVolume)
def decMainVolume(self, step=5):
self.mainVolume -= step
if self.mainVolume < 0:
self.mainVolume = 0
self._setVolume(self.SOUND_MIXER_WRITE_VOLUME, self.mainVolume)
def getPcmVolume(self):
return self.pcmVolume
def setPcmVolume(self, volume):
self.pcmVolume = volume
self._setVolume(self.SOUND_MIXER_WRITE_PCM, volume)
def incPcmVolume(self, step=5):
self.pcmVolume += step
if self.pcmVolume > 100:
self.pcmVolume = 100
self._setVolume(self.SOUND_MIXER_WRITE_PCM, self.pcmVolume)
def decPcmVolume(self, step=5):
self.pcmVolume -= step
if self.pcmVolume < 0:
self.pcmVolume = 0
self._setVolume(self.SOUND_MIXER_WRITE_PCM, self.pcmVolume)
def setLineinVolume(self, volume):
if config.MIXER_CONTROL_ALL:
self.lineinVolume = volume
self._setVolume(self.SOUND_MIXER_WRITE_LINE, volume)
def getLineinVolume(self):
return self.lineinVolume
def setMicVolume(self, volume):
if config.MIXER_CONTROL_ALL:
self.micVolume = volume
self._setVolume(self.SOUND_MIXER_WRITE_MIC, volume)
def setIgainVolume(self, volume):
"""For Igain (input from TV etc) on emu10k cards"""
if config.MIXER_CONTROL_ALL:
if volume > 100:
volume = 100
elif volume < 0:
volume = 0
self.igainVolume = volume
os.system('aumix -i%s > /dev/null 2>&1 &' % volume)
def getIgainVolume(self):
return self.igainVolume
def decIgainVolume(self, step=5):
self.igainVolume -= step
if self.igainVolume < 0:
self.igainVolume = 0
os.system('aumix -i-%s > /dev/null 2>&1 &' % step)
def incIgainVolume(self, step=5):
self.igainVolume += step
if self.igainVolume > 100:
self.igainVolume = 100
os.system('aumix -i+%s > /dev/null 2>&1 &' % step)
def setOgainVolume(self, volume):
"""For Ogain on SB Live Cards"""
if volume > 100:
volume = 100
elif volume < 0:
volume = 0
self.ogainVolume = volume
os.system('aumix -o%s > /dev/null 2>&1' % volume)
def reset(self):
if config.MIXER_CONTROL_ALL:
self.setLineinVolume(0)
self.setMicVolume(0)
if config.MIXER_MAJOR_CTRL == 'VOL':
self.setPcmVolume(config.MIXER_VOLUME_MAX)
elif config.MIXER_MAJOR_CTRL == 'PCM':
self.setMainVolume(config.MIXER_VOLUME_MAX)
self.setIgainVolume(0) # SB Live input from TV Card.
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