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tunnel-sink-new: Fix hang when used in combination with module-combine-sink

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When tunnel-sink-new was used in combination with module-combine-sink, PA
would hang because the main thread was blocked waiting for the execution
of the latency snapshot message. The message would never be processed
because the rtpoll associated with the control_inq of module-combine-sink
was never run.
This patch fixes the problem by running the rtpoll in the thread function
to process incoming messages. Though there are no users of the rtpoll for
module-tunnel-source-new, the same change is applied there.

Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/773>
This commit is contained in:
Georg Chini 2023-01-30 09:37:35 +01:00 • committed by PulseAudio Marge Bot
parent 3e5db72ab7
commit 6ae3961001
2 changed files with 24 additions and 12 deletions
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15
src/modules/module-tunnel-source-new.c
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@ -270,6 +270,11 @@ static void thread_func(void *userdata) {
if (u->new_data)
read_new_samples(u);
/* Run the rtpoll to process messages that other modules may have placed in the queue. */
pa_rtpoll_set_timer_relative(u->rtpoll, 0);
if (pa_rtpoll_run(u->rtpoll) < 0)
goto fail;
}
fail:
/* send a message to the ctl thread to ask it to either terminate us, or
@ -668,10 +673,12 @@ static int do_init(pa_module *m) {
u->msg = pa_msgobject_new(tunnel_msg);
u->msg->parent.process_msg = tunnel_process_msg;
/* The rtpoll created here is never run. It is only necessary to avoid crashes
* when module-tunnel-source-new is used together with module-loopback.
* module-loopback bases the asyncmsq on the rtpoll provided by the source and
* only works because it calls pa_asyncmsq_process_one(). */
/* The rtpoll created here must curently only exist to avoid crashes when
* the module is used together with module-loopback. Because module-loopback
* runs pa_asyncmsgq_process_one() from the pop callback, the rtpoll need not
* be run. We will do so anyway for potential modules similar to
* module-combine-sink that use the rtpoll of the underlying source for
* message exchange. */
u->rtpoll = pa_rtpoll_new();
default_source_name = pa_sprintf_malloc("tunnel-source-new.%s", remote_server);