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-## mixertest.py
-##
-## This is an example of using the ALSA mixer API
-##
-## The script will set the volume or mute switch of the specified Mixer
-## depending on command line options.
-##
-## Examples:
-## python mixertest.py # list available mixers
-## python mixertest.py Master # show Master mixer settings
-## python mixertest.py Master 80 # set the master volume to 80%
-## python mixertest.py Master 1,90 # set channel 1 volume to 90%
-## python mixertest.py Master mute # mute the master mixer
-## python mixertest.py Master unmute # unmute the master mixer
-
-import alsaaudio
-import sys
-
-if len(sys.argv) == 1:
- # Demonstrates how to read the available mixers
- print "Available mixer controls:"
- for m in alsaaudio.mixers():
- print " '%s'" % m
-
-if len(sys.argv) == 2:
- # Demonstrates how mixer settings are queried.
- name = sys.argv[1]
- try:
- mixer = alsaaudio.Mixer(name)
- except alsaaudio.ALSAAudioError:
- print "No such mixer"
- sys.exit(1)
-
- print "Mixer name: '%s'"%mixer.mixer()
- print "Capabilities",mixer.volumecap()+mixer.switchcap()
- volumes = mixer.getvolume()
- for i in range(len(volumes)):
- print "Channel %i volume: %i%%"%(i,volumes[i])
-
- try:
- mutes = mixer.getmute()
- for i in range(len(mutes)):
- if mutes[i]: print "Channel %i is muted"%i
- except alsaaudio.ALSAAudioError:
- # May not support muting
- pass
-
- try:
- recs = mixer.getrec()
- for i in range(len(recs)):
- if recs[i]: print "Channel %i is recording"%i
- except alsaaudio.ALSAAudioError:
- # May not support recording
- pass
-
-if (len(sys.argv)) == 3:
- # Demonstrates how to set mixer settings
- name = sys.argv[1]
- try:
- mixer = alsaaudio.Mixer(name)
- except alsaaudio.ALSAAudioError:
- print "No such mixer"
- sys.exit(1)
-
- args = sys.argv[2]
- if args in ['mute','unmute']:
- # Mute/unmute the mixer
- if args == 'mute': mixer.setmute(1)
- else: mixer.setmute(0)
- sys.exit(0)
- if args in ['rec','unrec']:
- # Enable/disable recording
- if args == 'rec': mixer.setrec(1)
- else: mixer.setrec(0)
- sys.exit(0)
-
-
- if args.find(',')!=-1:
- channel,volume = map(int,args.split(','))
- else:
- channel = alsaaudio.MIXER_CHANNEL_ALL
- volume = int(args)
- # Set volume for specified channel. MIXER_CHANNEL_ALL means set
- # volume for all channels
- mixer.setvolume(volume,channel)
-
-
-