Viewing file:  soundcardBackendSoundCard.py (5.03 KB) -rwxr-xr-x
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## soundcardBackendSoundCard.py
## Copyright (C) 2002, 2003 Red Hat, Inc.
## Copyright (C) 2002, 2003 Brent Fox <bfox@redhat.com>
## Copyright (C) 2004, 2005 Bastien Nocera <hadess@hadess.net>
## 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
## 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, write to the Free Software
## Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
import string
import os
import sys
##
## Sort for cards devices
##
def soundCardDevice_sort(device1, device2):
return cmp(device1[0], device2[0])
##
## cards devices class
##
class soundCardDevice:
def __init__(self):
self.description = ""
self.device_index = 0
# Sound card description & configuration structure
#
# Card description
# .driver - driver used by this card
# .maker - vendor
# .model - card type
#
# Card configuration
# .inxed - ALSA index of card
# .volume - volume of card
# .default_device - selected PCM device
# .devices - list of PCM devices
class soundCard:
def __init__(self, index):
# Card description
self.driver = ""
self.maker = None
self.type = None
self.bus = None
self.model = ""
# Card configuration
self.active = 0
self.index = index
self.volume = 75
self.device_list = []
self.default_device = 0
# Test sound
self.test_sound_device = 0
self.test_sound_play_end = 0
self.test_sound_aplay_pid = 0
def dump(self):
print "------- Card dump ---------"
print "Index: ",self.index
print "Vendor: ",self.maker
print "Model: ",self.model
print "Type: ",self.type
print "Driver: ",self.driver
print "Bus: ",self.bus
def clear(self):
self.active = 0
def getName(self):
if self.maker != None:
return self.maker+" "+self.model
else:
return self.model
def getDescription(self):
return self.type
def setVolume(self, volume):
#alsa drivers load muted. we need to set the volume for them.
self.volume = volume
amixer_path = "/bin/alsaunmute"
amixer_args = [amixer_path, `self.index`, "-s", `self.volume`]
amixer_pid = os.fork()
if (not amixer_pid):
try:
os.execv(amixer_path, amixer_args)
except:
sys.exit(0)
else:
os.waitpid(amixer_pid,0)
def getVolume(self):
return self.volume
def playTestSound(self):
if self.test_sound_aplay_pid != 0:
return
# set volume before playing test sound
self.setVolume(self.volume)
device = "plughw:%d,%d" % (self.index, self.test_sound_device)
path = "/usr/share/system-config-soundcard/system-config-soundcard.play"
self.test_sound_aplay_pid = os.fork()
if (not self.test_sound_aplay_pid):
try:
os.execv(path, [path, device])
except:
sys.exit(0)
def stopTestSound(self):
# Kill the child process
if self.test_sound_aplay_pid != 0:
os.kill(self.test_sound_aplay_pid,15)
def checkTestSound(self):
# Check if test sound is being played
finished = False
if (self.test_sound_aplay_pid != 0):
status = os.waitpid(self.test_sound_aplay_pid, os.WNOHANG)
if (status[0] != 0):
self.test_sound_aplay_pid = 0
finished = True
return (self.test_sound_aplay_pid, finished)
def loadCardDevices(self):
# Get line from /etc/asound/pcm
# Example
# 00-00: emu10k1 : ADC Capture/Standard PCM Playback : playback 32 : capture 1
try:
fd = open('/proc/asound/pcm', 'r')
devices = fd.readlines()
fd.close()
except:
return []
card_devices = []
for device in devices:
# the first two letters are card number
if(string.atoi(device[:2]) == self.index):
card_devices.append(device[3:])
#Process line with device number
#00: emu10k1 : ADC Capture/Standard PCM Playback : playback 32 : capture 1
device_list = []
for device in card_devices:
tmp = string.split(device,':',4)
device_list.append([int(tmp[0],10),tmp[2]])
device_list.sort(soundCardDevice_sort)
return device_list
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