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audio: extend -audio to allow creating a default backend

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If "-audio BACKEND" is used without a model, the resulting backend
will be used whenever the audiodev property is not specified.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-09-21 10:23:58 +02:00
parent 8f527a3c0d
commit 1ebdbff4c3
3 changed files with 37 additions and 21 deletions
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27
system/vl.c
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@ -2935,7 +2935,7 @@ void qemu_init(int argc, char **argv)
break;
case QEMU_OPTION_audio: {
bool help;
char *model;
char *model = NULL;
Audiodev *dev = NULL;
Visitor *v;
QDict *dict = keyval_parse(optarg, "driver", &help, &error_fatal);
@ -2948,22 +2948,25 @@ void qemu_init(int argc, char **argv)
if (!qdict_haskey(dict, "id")) {
qdict_put_str(dict, "id", "audiodev0");
}
if (!qdict_haskey(dict, "model")) {
error_setg(&error_fatal, "Parameter 'model' is missing");
}
model = g_strdup(qdict_get_str(dict, "model"));
qdict_del(dict, "model");
if (is_help_option(model)) {
show_valid_soundhw();
exit(0);
if (qdict_haskey(dict, "model")) {
model = g_strdup(qdict_get_str(dict, "model"));
qdict_del(dict, "model");
if (is_help_option(model)) {
show_valid_soundhw();
exit(0);
}
}
v = qobject_input_visitor_new_keyval(QOBJECT(dict));
qobject_unref(dict);
visit_type_Audiodev(v, NULL, &dev, &error_fatal);
visit_free(v);
audio_define(dev);
select_soundhw(model, dev->id);
g_free(model);
if (model) {
audio_define(dev);
select_soundhw(model, dev->id);
g_free(model);
} else {
audio_define_default(dev, &error_fatal);
}
break;
}
case QEMU_OPTION_h: