Clamp position to valid range. so that AUX becomes UNKNOWN.
If we have one mono source channel and unknown destination, copy it
to all destination channels.
If we have one mono destination channel and unknown source layout,
average all channels.
Otherwise, pair source and dest channels.
See #538
Instead of requiring the upstream node to resubmit the delayed
samples, keep the samples ourselves. The benefit is probably too
small to measure but it simplifies things a lot.
Use these commands to mark the begin and end of a series of Param
enumerations and configuration, like when doing format negotiation. The
idea is that the device can remain open while we do this.
Use this in adapter when negotiating a format.
We also need to remap channels for the splitter and merger.
Remember the port-config format and its channel layout. Internally,
we use a canonical channel layout which is simply all channels sorted
by id. Remap the channels accordingly.
Fixes#445
This is needed for example for Clang compiler which uses different
annotations than GCC. It will make WebRTC to happily use PipeWire
since the spa library is header-only and WebRTC defaults to use
Clang with -Wimplicit-fallthrough.
When we receive volume updates with a different number of channels
than we are configured for, remap them to our number of channels.
This currently involves taking the average volume until we actually
have a channelmap associated with the volume updates.
See #320
The flag means that the process function might not complete
synchronously.
We can use this knowledge to improve the adapter. In sync mode we
can pull before scheduling the converter. In async mode we need to
schedule the follower after the converter to get the data ready for
the next iteration.
We can also improve the stream when it is operating async to schedule
a process call when a new buffer is ready to be filled.
This reduces a cycle latency from alsa and improves latency in
pulse.
Handle the case where the converter in a source needs more output
buffers (-EPIPE). Schedule the follower in that case and try to
run the converter again until we have output or we can't make progress
anymore.
If the converter needs more data, schedule the follower before we
exit the loop with the data. This gives the follower a chance to get
more data asynchronously for the next iteration.
