SPA_MEMBER is misleading, all we're doing here is pointer+offset and a
type-casting the result. Rename to SPA_PTROFF which is more expressive (and
has the same number of characters so we don't need to re-indent).
A virtual source is usually implemented with a null-sink, it looks
like a source to pulseaudio clients but just forwards what it gets
as input.
Make sure the port names make sense.
You can use the null sink now as:
pactl load-module module-null-sink sink_name=source object.linger=1
media.class=Audio/Source/Virtual channel_map=FL,FR,RL,RR
This creates a node with "input" and "capture" ports and looks
like a virtual source for pulseaudio clients.
pactl load-module module-null-sink sink_name=source object.linger=1
media.class=Audio/Sink channel_map=FL,FR,RL,RR
This creates a node with "playback" and "monitor" ports and looks
like a virtual sink for pulseaudio clients.
pactl load-module module-null-sink sink_name=source object.linger=1
media.class=Audio/Duplex channel_map=FL,FR,RL,RR
This creates a node with "playback" and "capture" ports and looks
like a virtual source and sink for pulseaudio clients.
Remove the hooks we installed on objects in the destroy/free event
or before calling _destroy. This is not really needed but it is
a nice thing to do because it calls the hook removed callbacks.
The proxy API is the one that we would like to expose for applications
and the other API is used internally when implementing modules or
factories.
The current pw_core object is really a context for all objects so
name it that way. It also makes it possible to rename pw_core_proxy
to pw_proxy later.
When the port receives a format, look if we can find a mixer for it
and configure it.
Use the float32 mono mixer when possible.
Use the new pw_buffers in the link.
Let the port allocate buffers between the mixer and node when
requested.
The client-node doesn't need a mixer because mixing is done on the
client.
Remove all mixer and buffer negotiation code from adapter because
it is now done at the port level.
Remove the parent_id from the global event. Remove the parent
and owner from the global object.
Use properties instead to mark parents and owners of objects.
Properties are easier to control for client exported objects and
usually a simple parent/child is not enough. For example, a client
exported node has the client as a parent but also the factory that
created the node.
Implement per channel volume on channelmix. Extend control on stream to
take an array of values when possible.
Remove name argument from pw_node_new and pw_device_new. We can pass
this as a property instead.
Improve properties on nodes to more closely match what pulseaudio does.
Don't let the monitor do too much with the udev properties but let the
session manager set the description and icon-names.
Remove some change_mask flags for things that don't change in
introspect. Use the flags to mark changes in -cli and -monitor.
Remove the CAN_USE_BUFFERS flag, it is redundant. We can know this
because of the IO params and buffer params.
Add flags to the port_use_buffer call. We also want this call to
replace port_alloc_buffer. Together with a new result event we can
ask the node to (a)synchronously fill up the buffer data for us. This
is part of a plan to let remote nodes provide buffer data.
Use a new rate_match io area to exhange rate matching info between
sink/source and resampler.
Compensate for the rate match delay when scheduling timeouts.
Let the resampler notify the source of how many samples it needs to
produce the desired quantum. Make sure we keep an extra buffer in
the device to be able to make this possible.
Let the adapter directly call the slave node process function.
An adapter is like an audio-dsp node and client-stream combined.
It allows tighter control with the device (for rate control and
variable buffer sizes), software volume.
The idea is to also implement the client-stream with this
eventually.
