port_set_io with SPA_IO_Buffer can be used to enable/disable a port
when the node is running and so the node should make sure the io update
is synchronized with the processing loop.
Use spa_loop_invoke to make sure the mixers handle the port_io updates
correctly.
Setting buffers or a format also needs the port to be disabled so add
some checks for this in the mixers.
Use the same sorting as ardour for midi events with the same timestamp
so that the order is:
Controller messages > Program Change > Note Off > Note On >
Note Pressure > Channel Pressure > Pitch Bend
Fixes#1868
Make the alignment parameter optional when negotiating buffers.
Default to a 16 bytes alignment and adjust for the max cpu
alignment.
Remove the useless align buffer parameter in plugins, we always
set it to 16 anyway.
When we add a new listener to an object, it will emit the full state
of the object. For this it temporarily sets the change_mask to all
changes. Restore the previous state after this or else we might not
emit the right change_mask for the next listener.
Consider the case where one there are two listeners on an object.
The object emits a change and the first listener wants to enumerate the
changed params. For this is adds a new listener and then triggers the
enumeration. If we set the change_mask to 0 after adding the listener,
the second listener would get a 0 change_mask and fail to update
its state.
JACK can handle 2 buffers at most, make the default buffer allocator
allocate 2 buffers when no params are given.
Prefer 2 buffers, it allows some form of async fill/consume
This is more in line with wayland and it allows us to create new
interfaces in modules without having to add anything to the type
enum. It also removes some lookups to map type_id to readable
name in debug.
