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ao_pipewire: test for session to contain audio sinks 

The pure presence of PipeWire does not mean that it is actually driving
the audio session. For example it could only be meant for video.

Currently there is no proper API to detect this (see [0]), so we check
for the presence of audio sinks.

As soon as a proper API exists, we should use that.

[0] https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/1835
This commit is contained in:
Thomas Weißschuh 2022-10-10 23:52:55 +02:00 committed by Philip Langdale
parent e4505ce744
commit b9a9e0a6f1
1 changed files with 22 additions and 0 deletions
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22
audio/out/ao_pipewire.c
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@ -384,6 +384,22 @@ unlock_loop:
return ret;
}
static void have_sink(struct ao *ao, uint32_t id, const struct spa_dict *props, void *ctx)
{
bool *b = ctx;
*b = true;
}
static bool session_has_sinks(struct ao *ao)
{
bool b = false;
if (for_each_sink(ao, have_sink, &b) < 0)
MP_WARN(ao, "Could not list devices, sink detection may be wrong\n");
return b;
}
static int pipewire_init_boilerplate(struct ao *ao)
{
struct priv *p = ao->priv;
@ -416,6 +432,12 @@ static int pipewire_init_boilerplate(struct ao *ao)
}
pw_thread_loop_unlock(p->loop);
if (!session_has_sinks(ao)) {
MP_VERBOSE(ao, "PipeWire does not have any audio sinks, skipping\n");
return -1;
}
return 0;
error: