output_plugin: added methods enable() and disable()

With these methods, an output plugin can allocate some global
resources only if it is actually enabled.  The method enable() is
called after daemonization, which allows for more sophisticated
resource allocation during that method.

1 files changed, 19 insertions, 0 deletions

diff --git a/src/output_all.c b/src/output_all.c
index b7a42a6a3..a16be7386 100644
--- a/src/output_all.c
+++ b/src/output_all.c
@@ -153,6 +153,25 @@ audio_output_all_finish(void)
 	notify_deinit(&audio_output_client_notify);
 }
 
+void
+audio_output_all_enable_disable(void)
+{
+	for (unsigned i = 0; i < num_audio_outputs; i++) {
+		struct audio_output *ao = &audio_outputs[i];
+		bool enabled;
+
+		g_mutex_lock(ao->mutex);
+		enabled = ao->really_enabled;
+		g_mutex_unlock(ao->mutex);
+
+		if (ao->enabled != enabled) {
+			if (ao->enabled)
+				audio_output_enable(ao);
+			else
+				audio_output_disable(ao);
+		}
+	}
+}
 
 /**
  * Determine if all (active) outputs have finished the current