Xpra: Ticket #1205: fix sound forwarding for osx and win32 shadow servers

Follow up from #391, related to: #899.

When we shadow an OSX or win32 session, we want to forward the sound generated by those applications rather than any capture device (microphone).

It would also be nice to re-use the device selection code from pulseaudio (name match), and maybe introduce better command line arguments for it too.

Some changes already for win32: r12647 should allow us to select the capture device.

On OSX:

How to list available audio i/o devices in Bash: system_profiler SPAudioDataType
AudioObjectGetPropertyData to get a list of input devices
NSSound and Enumerating CoreAudio Output Devices
osxaudiosrc

Tue, 23 May 2017 07:31:38 GMT - Antoine Martin: milestone changed

milestone changed from 1.0 to 3.0

Tried using the "wasapi" source and sink plugin since this is the "new and improved" API on MS Windows, but this doesn't seem to work - even with the straightforward gst-launch audiotestsrc ! wasapisink test, so it is still commented out in r15928. Not much we can do if the latest gstreamer doesn't support it... delaying.

Tue, 23 Apr 2019 10:45:36 GMT - Antoine Martin: status, milestone changed

status changed from new to assigned
milestone changed from 3.0 to 4.0

wasapisink does work well, we've been shipping it since r15928, it works well enough that it could even be made the default
wasapisrc: as of r22521 it does look like it's doing something, but nothing comes out...

Wed, 12 Feb 2020 14:17:08 GMT - Antoine Martin: milestone changed

milestone changed from 4.0 to 5.0

Tried wasapisrc again using:

gst-launch-1.0 wasapisrc ! fakesink

And got: Failed to get default device.

So this is not ready.

Sat, 23 Jan 2021 05:17:51 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1205