pyatv Stream to Homepod Stereo Pair

Stream to Homepod Stereo Pair

Open charlesvestal opened this issue 2 years ago • 6 comments

What feature would you like?

When streaming to a homepod stereo pair, I see both as individually addressable homepods, but not as a stereo pair. I'd like to be able to stream (and control) the stereo pair, rather than individuals.

Describe the solution you'd like

When scanning for devices, detect a pair and show as an additional device.

Any other information to share?

I'm attempting (unsuccesfully) to get around this via an apple TV paired to the homepods, but I imagine there are users without an apple tv that would want to do the same.

Feb 16 '22 12:02 charlesvestal

There has been some work and success with this in OwnTone: https://github.com/owntone/owntone-server/issues/1413

Feb 17 '22 23:02 shauder

When comparing my two homepod mini's (set up as stereo pair) I have seen two service discovery outcomes for my actively playing stereo pair:

complete: differences as expected
incomplete: visible that it is a pair, but does not have all the expected settings

What they have in common:

gpn (group name) is set on both devices (same as the name of the group leader)
flags has bit 13 set for the group leader
gid (group UUID) is the same for both devices - can be "single" UUID, or can be a "concatenated" UUID.

Comparing the two situations in detail:

complete:

gpn (group name) same on both (same as name for the group leader)
flags for group leader has bit 13 set: TightSyncIsGroupLeader
gid (group UUID) same UUID on both devices (consist of tsid UUID and a 2nd one)
tsid (?) set to same UUID on both devices
gcgl (group contains group leader): set to 1 on both
pgid (parent group UUID) only set on the non-group-leader, has same value as gid
pgcgl (parent group contains discoverable leader ) only set on non-group-leader, set to 1
igcl (is group leader) set to 1 for the group leader, 0 for the other device

Format for gid/pgid: <tsid-UUID>+0+<some-other-UUID>

incomplete: Only gpn and flags are different between group leader and the non-group-leader. The flags are different than the complete example, but here as well: the group leader has bit 13 set.

gid: same on both devices (format: single UUID, not the same as tsid)
tsid: same on both devices (not used in gid or pgid) - and same as for complete example above
gcgl: 0 on both
pgid: same on both devices, same as gid
pgcgl: 0 on both
igl: 0 on both