forked from auracaster/pyalsaaudio
2314aaeb7e
The cards() method does not guarantee that the index in its return value is the same as the actual card index. Provide a way to get this information in the form of a card_indexes() function, returning a list of available card indexes. Add another method, card_name(), which, given a card index, returns the short and long names of that card.
130 lines
3.7 KiB
Python
Executable File
130 lines
3.7 KiB
Python
Executable File
#!/usr/bin/env python
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## mixertest.py
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##
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## This is an example of using the ALSA mixer API
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##
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## The script will set the volume or mute switch of the specified Mixer
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## depending on command line options.
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##
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## Examples:
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## python mixertest.py # list available mixers
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## python mixertest.py Master # show Master mixer settings
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## python mixertest.py Master 80 # set the master volume to 80%
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## python mixertest.py Master 1,90 # set channel 1 volume to 90%
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## python mixertest.py Master [un]mute # [un]mute the master mixer
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## python mixertest.py Capture [un]rec # [dis/en]able capture
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## python mixertest.py Master 0,[un]mute # [un]mute channel 0
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## python mixertest.py Capture 0,[un]rec # [dis/en]able capture on channel 0
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from __future__ import print_function
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import sys
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import getopt
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import alsaaudio
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def list_cards():
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print("Available sound cards:")
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for i in alsaaudio.card_indexes():
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(name, longname) = alsaaudio.card_name(i)
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print(" %d: %s (%s)" % (i, name, longname))
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def list_mixers(kwargs):
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print("Available mixer controls:")
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for m in alsaaudio.mixers(**kwargs):
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print(" '%s'" % m)
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def show_mixer(name, kwargs):
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# Demonstrates how mixer settings are queried.
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try:
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mixer = alsaaudio.Mixer(name, **kwargs)
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except alsaaudio.ALSAAudioError:
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print("No such mixer", file=sys.stderr)
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sys.exit(1)
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print("Mixer name: '%s'" % mixer.mixer())
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print("Capabilities: %s %s" % (' '.join(mixer.volumecap()),
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' '.join(mixer.switchcap())))
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volumes = mixer.getvolume()
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for i in range(len(volumes)):
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print("Channel %i volume: %i%%" % (i,volumes[i]))
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try:
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mutes = mixer.getmute()
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for i in range(len(mutes)):
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if mutes[i]:
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print("Channel %i is muted" % i)
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except alsaaudio.ALSAAudioError:
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# May not support muting
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pass
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try:
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recs = mixer.getrec()
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for i in range(len(recs)):
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if recs[i]:
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print("Channel %i is recording" % i)
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except alsaaudio.ALSAAudioError:
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# May not support recording
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pass
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def set_mixer(name, args, kwargs):
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# Demonstrates how to set mixer settings
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try:
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mixer = alsaaudio.Mixer(name, **kwargs)
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except alsaaudio.ALSAAudioError:
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print("No such mixer", file=sys.stderr)
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sys.exit(1)
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if args.find(',') != -1:
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args_array = args.split(',')
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channel = int(args_array[0])
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args = ','.join(args_array[1:])
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else:
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channel = alsaaudio.MIXER_CHANNEL_ALL
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if args in ['mute', 'unmute']:
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# Mute/unmute the mixer
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if args == 'mute':
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mixer.setmute(1, channel)
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else:
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mixer.setmute(0, channel)
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elif args in ['rec','unrec']:
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# Enable/disable recording
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if args == 'rec':
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mixer.setrec(1, channel)
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else:
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mixer.setrec(0, channel)
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else:
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# Set volume for specified channel. MIXER_CHANNEL_ALL means set
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# volume for all channels
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volume = int(args)
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mixer.setvolume(volume, channel)
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def usage():
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print('usage: mixertest.py [-c <card>] [ <control>[,<value>]]',
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file=sys.stderr)
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sys.exit(2)
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if __name__ == '__main__':
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kwargs = {}
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opts, args = getopt.getopt(sys.argv[1:], 'c:d:?h')
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for o, a in opts:
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if o == '-c':
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kwargs = { 'cardindex': int(a) }
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elif o == '-d':
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kwargs = { 'device': a }
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else:
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usage()
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list_cards()
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if not len(args):
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list_mixers(kwargs)
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elif len(args) == 1:
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show_mixer(args[0], kwargs)
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else:
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set_mixer(args[0], args[1], kwargs)
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