When we were using the resampler and then bypass it when the configured
rate == 1.0, we create a pop because we don't process the queued data in
the resampler anymore.
Avoid this by keeping the resampler active as soon as the rate property
is set on the audioconvert. The resampler itself will use a more
efficient copy method in that case anyway and it is expected that the
rate will change again later when we need to reactivate the resampler.
pw_stream_connect can take a very long time to finish connecting. This
process continues after snd_pcm_pipewire_prepare has released lock on
pw->main_loop and during this time the device returns EBUSY on write
attempts. This adds a significant latency to playback compared to pre-
pipewire configurations. This is a problem when using for example
Gstreamer alsasink with tight time synchronization options since
GstAudioBaseSink keeps track of internal time by counting processed
samples. Also worth noting is that alsasink calls prepare often,
for example on receiving a caps event.
With this change an existing pipewire stream will be updated rather than
destroyed and re-created when prepare is called.
By default no modem is allowed.
Property "bluez5.hfphsp-backend-native-modem" can be 'none', 'any' or the
modem device string has found in 'Device' property of
org.freedesktop.ModemManager1.Modem interface, e.g. for PinePhone
"/sys/devices/platform/soc/1c1b000.usb/usb2/2-1".
This allows the HFP HF to retrieve the list of calls with their index,
state and remote number (if available).
This commit shared the list of calls between modemmanager.c and
backend-native.c, and switches call state storage from ModemManager
states to CLCC states
Allow to answer, reject or terminate a call.
Answering or rejecting a call can only be done on an incoming call.
Terminating a call can only be done on active, dialing or alerting call.
The Voice object lists the Call objects, which provides status of each call.
+CIND call indicator is set if at least one of the call is active.
+CIND callsetup indicator is set if one of the call is in ringing in or out
or dialing state.
