headset-setup : set the bluetooth headset profile to a2dp or headset or off

README.md

headset-setup

This is just a small python program that pokes pulseaudio to set the profile of my bluetooth headset to a2dp and also to remind me how to fix it.

setup

venv just creates a virtual env and enters it.

venv create --py3 pulseaudio pip install pulsectl

Usage

headset-setup a2dp

Notes

There are loads of bugs and askubuntu questions and things that mention pulseaudio not able to set up a2dp.

My big aha! moment was realizing if i pushed the 'pause' button on my headset that all of a sudden i could then change the input to a2dp.

headset-setup

#!/usr/bin/env python3
# https://gist.github.com/smoser/46bc23907a0f4db00a41088d912386dd

import argparse
import sys
import os

try:
    from pulsectl import Pulse, pulsectl
except ImportError as e:
    if os.environ.get('_BT_EXEC', "0") != "0":
        # avoid recursion
        sys.exit(1)
    os.environ['_BT_EXEC'] = "1"
    os.execvp('venv', ['venv', 'activate', 'pulseaudio'] + sys.argv)
    

def main():
    smap = {'a2dp': 'a2dp_sink', 'headset': 'headset_head_unit', 'off': 'off'}
    parser = argparse.ArgumentParser()

    parser.add_argument('--verbose', '-v', action='count', default=0)
    parser.add_argument('mode', choices=smap.keys(), default='a2dp')

    args = parser.parse_args()


    with Pulse('local-smoser-pulse') as pulse:
        devs = [d for d in pulse.card_list() if
                d.name.startswith('bluez')]
        if len(devs) == 0:
            sys.stderr.write("No bluetooth devices?\n")
        elif len(devs) > 1:
            sys.stderr.write("Too many matches: %s\n" % devs)
            for d in devs:
                sys.stderr.write(
                    "%s %s\n" % (d.name, d.proplist['device.description']))

        if len(devs) != 1:
            sys.exit(1)


        headset = devs[0]

        #for prof in headset.profile_list:
        #    print("%s: %s" % (prof.name, prof.description))

        print("Setting %s [%s] to %s" %
              (headset.proplist['device.description'], headset.name,
               args.mode))
        try:
            pulse.card_profile_set(headset, smap[args.mode])
        except pulsectl.PulseOperationFailed as e:
            print("Failed to set %s on %s: %s" %
                  (args.mode, headset.proplist['device.description'], e))
            if args.mode == 'a2dp':
                print("Push the button on the headset!")
            sys.exit(1)
        sys.exit(0)


if __name__ == '__main__':
    sys.exit(main())