input/alsa: use the EventLoop& passed to init() instead of io_thread_get()

src/input/plugins/AlsaInputPlugin.cxx

@@ -39,7 +39,6 @@
 #include "Log.hxx"
 #include "event/MultiSocketMonitor.hxx"
 #include "event/DeferredMonitor.hxx"
-#include "IOThread.hxx"
 
 #include <alsa/asoundlib.h>
 
@@ -107,7 +106,8 @@ public:
 		snd_pcm_close(capture_handle);
 	}
 
-	static InputStream *Create(const char *uri, Mutex &mutex, Cond &cond);
+	static InputStream *Create(EventLoop &event_loop, const char *uri,
+				   Mutex &mutex, Cond &cond);
 
 protected:
 	/* virtual methods from AsyncInputStream */
@@ -146,7 +146,8 @@ private:
 };
 
 inline InputStream *
-AlsaInputStream::Create(const char *uri, Mutex &mutex, Cond &cond)
+AlsaInputStream::Create(EventLoop &event_loop, const char *uri,
+			Mutex &mutex, Cond &cond)
 {
 	const char *device = StringAfterPrefix(uri, "alsa://");
 	if (device == nullptr)
@@ -165,7 +166,7 @@ AlsaInputStream::Create(const char *uri, Mutex &mutex, Cond &cond)
 	snd_pcm_t *handle = OpenDevice(device, rate, format, channels);
 
 	int frame_size = snd_pcm_format_width(format) / 8 * channels;
-	return new AlsaInputStream(io_thread_get(),
+	return new AlsaInputStream(event_loop,
 				   uri, mutex, cond,
 				   device, handle, frame_size);
 }
@@ -386,15 +387,24 @@ AlsaInputStream::OpenDevice(const char *device,
 
 /*#########################  Plugin Functions  ##############################*/
 
+static EventLoop *alsa_input_event_loop;
+
+static void
+alsa_input_init(EventLoop &event_loop, const ConfigBlock &)
+{
+	alsa_input_event_loop = &event_loop;
+}
+
 static InputStream *
 alsa_input_open(const char *uri, Mutex &mutex, Cond &cond)
 {
-	return AlsaInputStream::Create(uri, mutex, cond);
+	return AlsaInputStream::Create(*alsa_input_event_loop, uri,
+				       mutex, cond);
 }
 
 const struct InputPlugin input_plugin_alsa = {
 	"alsa",
-	nullptr,
+	alsa_input_init,
 	nullptr,
 	alsa_input_open,
 };