When we are operating in passthrough, let the Start command pass through
to the follower in all cases. Only do the negotiate/buffers when not in
passthrough.
This fixes a case where the buffers are cleared on the alsa node and it
Pauses but then never resumes in a Start because the node is already
started. The real problem is probably somewhere else (in PipeWire) but
for now this will improve things in passthrough.
Don't just forward the tag and latency events to the follower but let
the audioconvert aggregate and emit the updated tag/latency event
that is then configured on the follower.
When using the DSP mode of the audioconvert, this results in an
accumulated latency/tag from all the DSP ports instead of just
the last DSP port param update.
Put properties with media. prefix in tags in pw-cat.
The tag param has a list of arbitrary key/value pairs. Like the Latency
param, it travels up and downstream. Mixers will append the info
dictionaries or do some more fancy merging.
The purpose is to transport arbirary metadata, out-of-band, through the
graph and it's used for stream metadata and other stream properties.
Add a _fast callback function that skips the version and method check.
We can use this in places where performance is critical when we do the
check out of the critical loops.
Make all system methods _fast calls. We expect them to exist and have
the right version. If we add new versions we can make them slow.
Add port.ignore-latency prop, which if true causes peer ports to ignore
the latency of the given port.
This is useful for ports that are not intended to affect latency
calculations of other ports, such as ports in monitor streams.
When we're using the peaks resampler, allow resampling, even when it is
disabled in the config.
The peaks resampler is just for GUI and would not really change the
signal, so we can allow this.
Use a new boolean to check if the follower is allowed to emit a ready
event. This can be done right after negotiating.
Set the started field to true after we finish setting the state of the
converter and follower. This fields is used to block calling into the
process function before we complete the setup.
This avoid a crash in always-process nodes when the node is scheduled
before the audioconverter completes setup.
When the node receives a set_param Props, it calls the follower
set_param implementation. If that one calls set_param again on the
adapter, discards the original set_param.
This makes it possible for the follower to intercept the Props param and
set a modified version on the converter. This can be used to intercept
volume changes.
