audio: remove qemu_spice_audio_init()

Handle the spice special case in audio_init instead.

With the qemu_spice_audio_init() symbol dependency being
gone we can build spiceaudio as module.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20200916084117.21828-2-kraxel@redhat.com

audio/audio.c

@@ -34,6 +34,7 @@
 #include "qemu/module.h"
 #include "sysemu/replay.h"
 #include "sysemu/runstate.h"
+#include "ui/qemu-spice.h"
 #include "trace.h"
 
 #define AUDIO_CAP "audio"
@@ -1696,6 +1697,21 @@ static AudioState *audio_init(Audiodev *dev, const char *name)
     /* silence gcc warning about uninitialized variable */
     AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head);
 
+    if (using_spice) {
+        /*
+         * When using spice allow the spice audio driver being picked
+         * as default.
+         *
+         * Temporary hack.  Using audio devices without explicit
+         * audiodev= property is already deprecated.  Same goes for
+         * the -soundhw switch.  Once this support gets finally
+         * removed we can also drop the concept of a default audio
+         * backend and this can go away.
+         */
+        driver = audio_driver_lookup("spice");
+        driver->can_be_default = 1;
+    }
+
     if (dev) {
         /* -audiodev option */
         legacy_config = false;

audio/spiceaudio.c

@@ -311,11 +311,6 @@ static struct audio_driver spice_audio_driver = {
     .voice_size_in  = sizeof (SpiceVoiceIn),
 };
 
-void qemu_spice_audio_init (void)
-{
-    spice_audio_driver.can_be_default = 1;
-}
-
 static void register_audio_spice(void)
 {
     audio_driver_register(&spice_audio_driver);

include/ui/qemu-spice.h

@@ -29,7 +29,6 @@ extern int using_spice;
 
 void qemu_spice_init(void);
 void qemu_spice_input_init(void);
-void qemu_spice_audio_init(void);
 void qemu_spice_display_init(void);
 int qemu_spice_display_add_client(int csock, int skipauth, int tls);
 int qemu_spice_add_interface(SpiceBaseInstance *sin);

ui/spice-core.c

@@ -804,7 +804,6 @@ void qemu_spice_init(void)
     qemu_spice_add_interface(&spice_migrate.base);
 
     qemu_spice_input_init();
-    qemu_spice_audio_init();
 
     qemu_add_vm_change_state_handler(vm_change_state_handler, NULL);
     qemu_spice_display_stop();