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spa: use dynamic builder where we can

With the spa_auto support this becomes feasable and avoids problems when
the pod size is unknown and ends up larger than our stack buffer.

pod: add spa_auto support for dynamic builder

pod: handle realloc failure

When realloc fails, the original pointer is untouched so store the
result of realloc somewhere else so that we don't cause a leak.

alsa: add Tag set and enum support

So that we can see the tags on the sinks and sources.

alsa: clean up some latency param handling

pulse-server: place stream media.* keys as Tag

pw-cat: don't overrun our param array

alsa: add extra checks

Check if the device is opened when doing _prepare or _start. When it was
a follower but failed to open, we might otherwise crash.

Fixes #3554

jack: fix midi events in destination buffer

Don't fix up the midi events in the (read only) input buffer but
after we have converted it into the JACK midi buffer.

See #3560

filter-chain: fix typo

env: PIPEWIRE_QUANTUM now uses FORCE_RATE and FORCE_QUANTUM

Make it force a RATE and QUANTUM on the graph. The non-force options
can already be done with PIPEWIRE_RATE and PIPEWIRE_LATENCY.

filter-chain: explain volumes a little better

impl-node: rework resume after rate switch

We only need to resume the SUSPENDED node when it has !pause-on-idle.
So, set the need_resume flag when we suspend in that case.

Clear the flag in the next round and make sure we set the node to
running again. We don't need to clear any flags when the state change
completes anymore with this change.

This also fixes a case where strawberry would fail to configure the
correct sample rate. 44.1KHz would be used (the rate of the probe
stream) because the scheduler was thinking the node was still being
reconfigured because the reconfigure flag was only cleared when going
to the running state (an alsa sink has !pause_on_idle).

See #2929

acp: only disable tsched when linking

Disable timer based scheduling only if we are going to link the devices
together.

See #3556

rtp-stream: senum -> seqnum

module-raop-sink: Port to rtp-module/stream

module-rtp/stream: Add support for RAOP

module-rtp/stream: Add getter for pw_stream state

module-rtp/stream: Add setter for property

module-rtp/stream: Add getter for property

module-rtp/stream: Add param_changed method

This method can be used to access the param_changed method of the
underlying pw_stream.

Also adds new public functions rtp_stream_set_param and
rtp_stream_update_params which plum things through to pw_stream_set_param
and pw_stream_update_params respectively.

module-rtp/stream: Add ability to set marker on first packet

module-raop-sink: Simplify rtp send functions

Reorganizes the rtp send functions.

Part of porting module-raop-sink towards the
module-rtp/stream facilities.

module-raop-sink: Drop the RTSP FLUSH request

The RTSP FLUSH request does not seem to be required.

This change also fixes an issue where another RECORD request is
erroneously sent when the stream switches back from paused to streaming
by only setting `impl->streaming = false` in `rtsp_do_teardown()`.

context: allow non-power-of-2 quantum when forced

When forcing a quantum allow non-power-of-2 as well.

acp: only join and link when 1 capture and 1 playback

Only schedule nodes together when there is just 1 capture and 1 playback
device. Devices might be mutually exclusive or require special setup
that would break otherwise.

See #3556

acp: fix compilation

alsa: add api.alsa.auto-link option

Add an option to automatically use snd_pcm_link when the follower clock
is matching the driver. Only set this to true in pro-audio and when
nodes are scheduled together.

See #3556

impl-client: fix client property update access check

The `pipewire.*` properties may be set by clients but not changed by
them. However, how the checks are done now this allows e.g. connecting
clients to set `pipewire.access` themselves, which is not intended.

Fix the client property update check to not allow clients to set
pipewire.protocol/access, object.serial/id, pipewire.sec.* which are
supposed to be set by the server.

Release pipewire version 0.3.81-1

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>