audio: disable default backends if -audio/-audiodev is used

Match what is done for other options, for example -monitor, and also
the behavior of QEMU 8.1 (see the "legacy_config" variable).  Require
the user to specify a backend if one is specified on the command line.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

2 files changed, 2 insertions, 8 deletions

diff --git a/audio/audio.c b/audio/audio.c
index 9862157..67a7e25 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -1688,14 +1688,10 @@ static const VMStateDescription vmstate_audio = {
 
 static void audio_validate_opts(Audiodev *dev, Error **errp);
 
-static void audio_create_default_audiodevs(void)
+void audio_create_default_audiodevs(void)
 {
     const char *drvname = getenv("QEMU_AUDIO_DRV");
 
-    if (!defaults_enabled()) {
-        return;
-    }
-
     /* QEMU_AUDIO_DRV=none is used by libqtest.  */
     if (drvname && !g_str_equal(drvname, "none")) {
         error_report("Please use -audiodev instead of QEMU_AUDIO_*");
@@ -1827,9 +1823,6 @@ bool AUD_register_card (const char *name, QEMUSoundCard *card, Error **errp)
             }
             card->state = QTAILQ_FIRST(&audio_states);
         } else {
-            if (QSIMPLEQ_EMPTY(&default_audiodevs)) {
-                audio_create_default_audiodevs();
-            }
             card->state = audio_init(NULL, errp);
             if (!card->state) {
                 if (!QSIMPLEQ_EMPTY(&audiodevs)) {
diff --git a/audio/audio.h b/audio/audio.h
index 80f3f92..53b1d7e 100644
--- a/audio/audio.h
+++ b/audio/audio.h
@@ -170,6 +170,7 @@ void audio_sample_from_uint64(void *samples, int pos,
 
 void audio_define(Audiodev *audio);
 void audio_parse_option(const char *opt);
+void audio_create_default_audiodevs(void);
 void audio_init_audiodevs(void);
 void audio_help(void);