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GET /api/patches/2196819/?format=api
HTTP 200 OK
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{
    "id": 2196819,
    "url": "http://patchwork.ozlabs.org/api/patches/2196819/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260216-audio-v1-42-e676662e4514@redhat.com/",
    "project": {
        "id": 14,
        "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api",
        "name": "QEMU Development",
        "link_name": "qemu-devel",
        "list_id": "qemu-devel.nongnu.org",
        "list_email": "qemu-devel@nongnu.org",
        "web_url": "",
        "scm_url": "",
        "webscm_url": "",
        "list_archive_url": "",
        "list_archive_url_format": "",
        "commit_url_format": ""
    },
    "msgid": "<20260216-audio-v1-42-e676662e4514@redhat.com>",
    "list_archive_url": null,
    "date": "2026-02-16T11:15:31",
    "name": "[42/85] audio/dbus: convert to QOM lifecycle methods",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "ed716f67ee8504ee1b0ff3ce0979062220caa834",
    "submitter": {
        "id": 66774,
        "url": "http://patchwork.ozlabs.org/api/people/66774/?format=api",
        "name": "Marc-André Lureau",
        "email": "marcandre.lureau@redhat.com"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260216-audio-v1-42-e676662e4514@redhat.com/mbox/",
    "series": [
        {
            "id": 492294,
            "url": "http://patchwork.ozlabs.org/api/series/492294/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=492294",
            "date": "2026-02-16T11:14:52",
            "name": "audio: cleanups & add a manual test",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/492294/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2196819/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2196819/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>",
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        "From": "=?utf-8?q?Marc-Andr=C3=A9_Lureau?= <marcandre.lureau@redhat.com>",
        "Date": "Mon, 16 Feb 2026 12:15:31 +0100",
        "Subject": "[PATCH 42/85] audio/dbus: convert to QOM lifecycle methods",
        "MIME-Version": "1.0",
        "Content-Type": "text/plain; charset=\"utf-8\"",
        "Content-Transfer-Encoding": "8bit",
        "Message-Id": "<20260216-audio-v1-42-e676662e4514@redhat.com>",
        "References": "<20260216-audio-v1-0-e676662e4514@redhat.com>",
        "In-Reply-To": "<20260216-audio-v1-0-e676662e4514@redhat.com>",
        "To": "qemu-devel@nongnu.org",
        "Cc": "Gerd Hoffmann <kraxel@redhat.com>,  Eduardo Habkost <eduardo@habkost.net>,\n Paolo Bonzini <pbonzini@redhat.com>,\n =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= <berrange@redhat.com>, =?utf-8?q?Phil?=\n\t=?utf-8?q?ippe_Mathieu-Daud=C3=A9?= <philmd@linaro.org>,\n  John Snow <jsnow@redhat.com>, Cleber Rosa <crosa@redhat.com>,\n  Christian Schoenebeck <qemu_oss@crudebyte.com>,\n  Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>,\n  Thomas Huth <huth@tuxfamily.org>, Alexandre Ratchov <alex@caoua.org>,\n\t=?utf-8?q?Alex_Benn=C3=A9e?= <alex.bennee@linaro.org>,\n  Laurent Vivier <laurent@vivier.eu>, \"Michael S. Tsirkin\" <mst@redhat.com>,\n  Manos Pitsidianakis <manos.pitsidianakis@linaro.org>,\n  Alistair Francis <alistair@alistair23.me>,\n  \"Edgar E. Iglesias\" <edgar.iglesias@gmail.com>,\n  Peter Maydell <peter.maydell@linaro.org>, qemu-arm@nongnu.org, =?utf-8?q?M?=\n\t=?utf-8?q?arc-Andr=C3=A9_Lureau?= <marcandre.lureau@redhat.com>,\n  Mark Cave-Ayland <mark.caveayland@nutanix.com>",
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    },
    "content": "Migrate the D-Bus audio backend from the legacy driver init/fini\ncallbacks to proper QOM realize and finalize methods.\n\nThe DBusAudio struct fields are now embedded directly in the AudioDbus\nQOM object instead of being allocated separately as drv_opaque. This\nallows accessing the backend state through proper QOM type casting\nwith AUDIO_DBUS() rather than casting drv_opaque pointers.\n\nSigned-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>\nReviewed-by: Mark Cave-Ayland <mark.caveayland@nutanix.com>\n---\n audio/dbusaudio.c | 76 ++++++++++++++++++++++++++++---------------------------\n 1 file changed, 39 insertions(+), 37 deletions(-)",
    "diff": "diff --git a/audio/dbusaudio.c b/audio/dbusaudio.c\nindex 269db7877b6..fb059815de9 100644\n--- a/audio/dbusaudio.c\n+++ b/audio/dbusaudio.c\n@@ -48,21 +48,20 @@\n #define TYPE_AUDIO_DBUS \"audio-dbus\"\n OBJECT_DECLARE_SIMPLE_TYPE(AudioDbus, AUDIO_DBUS)\n \n+static AudioBackendClass *audio_dbus_parent_class;\n+\n struct AudioDbus {\n     AudioMixengBackend parent_obj;\n-};\n-\n-static struct audio_driver dbus_audio_driver;\n \n-typedef struct DBusAudio {\n-    Audiodev *dev;\n     GDBusObjectManagerServer *server;\n     bool p2p;\n     GDBusObjectSkeleton *audio;\n     QemuDBusDisplay1Audio *iface;\n     GHashTable *out_listeners;\n     GHashTable *in_listeners;\n-} DBusAudio;\n+};\n+\n+static struct audio_driver dbus_audio_driver;\n \n typedef struct DBusVoiceOut {\n     HWVoiceOut hw;\n@@ -105,7 +104,7 @@ static void *dbus_get_buffer_out(HWVoiceOut *hw, size_t *size)\n \n static size_t dbus_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size)\n {\n-    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(hw->s);\n     DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);\n     GHashTableIter iter;\n     QemuDBusDisplay1AudioOutListener *listener = NULL;\n@@ -162,9 +161,9 @@ dbus_init_out_listener(QemuDBusDisplay1AudioOutListener *listener,\n }\n \n static guint\n-dbus_audio_get_nsamples(DBusAudio *da)\n+dbus_audio_get_nsamples(AudioDbus *da)\n {\n-    AudiodevDBusOptions *opts = &da->dev->u.dbus;\n+    AudiodevDBusOptions *opts = &AUDIO_MIXENG_BACKEND(da)->dev->u.dbus;\n \n     if (opts->has_nsamples && opts->nsamples) {\n         return opts->nsamples;\n@@ -176,7 +175,7 @@ dbus_audio_get_nsamples(DBusAudio *da)\n static int\n dbus_init_out(HWVoiceOut *hw, struct audsettings *as, void *drv_opaque)\n {\n-    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(hw->s);\n     DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);\n     GHashTableIter iter;\n     QemuDBusDisplay1AudioOutListener *listener = NULL;\n@@ -195,7 +194,7 @@ dbus_init_out(HWVoiceOut *hw, struct audsettings *as, void *drv_opaque)\n static void\n dbus_fini_out(HWVoiceOut *hw)\n {\n-    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(hw->s);\n     DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);\n     GHashTableIter iter;\n     QemuDBusDisplay1AudioOutListener *listener = NULL;\n@@ -214,7 +213,7 @@ dbus_fini_out(HWVoiceOut *hw)\n static void\n dbus_enable_out(HWVoiceOut *hw, bool enable)\n {\n-    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(hw->s);\n     DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);\n     GHashTableIter iter;\n     QemuDBusDisplay1AudioOutListener *listener = NULL;\n@@ -256,7 +255,7 @@ dbus_volume_out_listener(HWVoiceOut *hw,\n static void\n dbus_volume_out(HWVoiceOut *hw, Volume *vol)\n {\n-    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(hw->s);\n     DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);\n     GHashTableIter iter;\n     QemuDBusDisplay1AudioOutListener *listener = NULL;\n@@ -290,7 +289,7 @@ dbus_init_in_listener(QemuDBusDisplay1AudioInListener *listener, HWVoiceIn *hw)\n static int\n dbus_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)\n {\n-    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(hw->s);\n     DBusVoiceIn *vo = container_of(hw, DBusVoiceIn, hw);\n     GHashTableIter iter;\n     QemuDBusDisplay1AudioInListener *listener = NULL;\n@@ -309,7 +308,7 @@ dbus_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)\n static void\n dbus_fini_in(HWVoiceIn *hw)\n {\n-    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(hw->s);\n     GHashTableIter iter;\n     QemuDBusDisplay1AudioInListener *listener = NULL;\n \n@@ -346,7 +345,7 @@ dbus_volume_in_listener(HWVoiceIn *hw,\n static void\n dbus_volume_in(HWVoiceIn *hw, Volume *vol)\n {\n-    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(hw->s);\n     DBusVoiceIn *vo = container_of(hw, DBusVoiceIn, hw);\n     GHashTableIter iter;\n     QemuDBusDisplay1AudioInListener *listener = NULL;\n@@ -363,7 +362,7 @@ dbus_volume_in(HWVoiceIn *hw, Volume *vol)\n static size_t\n dbus_read(HWVoiceIn *hw, void *buf, size_t size)\n {\n-    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(hw->s);\n     /* DBusVoiceIn *vo = container_of(hw, DBusVoiceIn, hw); */\n     GHashTableIter iter;\n     QemuDBusDisplay1AudioInListener *listener = NULL;\n@@ -398,7 +397,7 @@ dbus_read(HWVoiceIn *hw, void *buf, size_t size)\n static void\n dbus_enable_in(HWVoiceIn *hw, bool enable)\n {\n-    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(hw->s);\n     DBusVoiceIn *vo = container_of(hw, DBusVoiceIn, hw);\n     GHashTableIter iter;\n     QemuDBusDisplay1AudioInListener *listener = NULL;\n@@ -416,28 +415,31 @@ dbus_enable_in(HWVoiceIn *hw, bool enable)\n     }\n }\n \n-static void *\n-dbus_audio_init(Audiodev *dev, Error **errp)\n+static bool\n+audio_dbus_realize(AudioBackend *abe, Audiodev *dev, Error **errp)\n {\n-    DBusAudio *da;\n+    AudioDbus *da = AUDIO_DBUS(abe);\n \n     if (!qemu_using_dbus_display(errp)) {\n-        return NULL;\n+        qapi_free_Audiodev(dev);\n+        return false;\n+    }\n+\n+    if (!audio_dbus_parent_class->realize(abe, dev, errp)) {\n+        return false;\n     }\n \n-    da = g_new0(DBusAudio, 1);\n-    da->dev = dev;\n     da->out_listeners = g_hash_table_new_full(g_str_hash, g_str_equal,\n-                                                g_free, g_object_unref);\n+                                              g_free, g_object_unref);\n     da->in_listeners = g_hash_table_new_full(g_str_hash, g_str_equal,\n-                                               g_free, g_object_unref);\n-    return da;\n+                                             g_free, g_object_unref);\n+    return true;\n }\n \n static void\n-dbus_audio_fini(void *opaque)\n+audio_dbus_finalize(Object *obj)\n {\n-    DBusAudio *da = opaque;\n+    AudioDbus *da = AUDIO_DBUS(obj);\n \n     if (da->server) {\n         g_dbus_object_manager_server_unexport(da->server,\n@@ -448,14 +450,13 @@ dbus_audio_fini(void *opaque)\n     g_clear_pointer(&da->in_listeners, g_hash_table_unref);\n     g_clear_pointer(&da->out_listeners, g_hash_table_unref);\n     g_clear_object(&da->server);\n-    g_free(da);\n }\n \n static void\n listener_out_vanished_cb(GDBusConnection *connection,\n                          gboolean remote_peer_vanished,\n                          GError *error,\n-                         DBusAudio *da)\n+                         AudioDbus *da)\n {\n     char *name = g_object_get_data(G_OBJECT(connection), \"name\");\n \n@@ -466,7 +467,7 @@ static void\n listener_in_vanished_cb(GDBusConnection *connection,\n                         gboolean remote_peer_vanished,\n                         GError *error,\n-                        DBusAudio *da)\n+                        AudioDbus *da)\n {\n     char *name = g_object_get_data(G_OBJECT(connection), \"name\");\n \n@@ -482,7 +483,7 @@ dbus_audio_register_listener(AudioMixengBackend *s,\n                              GVariant *arg_listener,\n                              bool out)\n {\n-    DBusAudio *da = s->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(s);\n     const char *sender =\n         da->p2p ? \"p2p\" : g_dbus_method_invocation_get_sender(invocation);\n     g_autoptr(GDBusConnection) listener_conn = NULL;\n@@ -667,9 +668,8 @@ dbus_audio_set_server(AudioBackend *s,\n                       bool p2p,\n                       Error **errp)\n {\n-    DBusAudio *da = AUDIO_MIXENG_BACKEND(s)->drv_opaque;\n+    AudioDbus *da = AUDIO_DBUS(s);\n \n-    g_assert(da);\n     g_assert(!da->server);\n \n     da->server = g_object_ref(server);\n@@ -711,8 +711,6 @@ static struct audio_pcm_ops dbus_pcm_ops = {\n \n static struct audio_driver dbus_audio_driver = {\n     .name            = \"dbus\",\n-    .init            = dbus_audio_init,\n-    .fini            = dbus_audio_fini,\n     .pcm_ops         = &dbus_pcm_ops,\n     .max_voices_out  = INT_MAX,\n     .max_voices_in   = INT_MAX,\n@@ -725,6 +723,9 @@ static void audio_dbus_class_init(ObjectClass *klass, const void *data)\n     AudioBackendClass *b = AUDIO_BACKEND_CLASS(klass);\n     AudioMixengBackendClass *k = AUDIO_MIXENG_BACKEND_CLASS(klass);\n \n+    audio_dbus_parent_class = AUDIO_BACKEND_CLASS(object_class_get_parent(klass));\n+\n+    b->realize = audio_dbus_realize;\n     b->set_dbus_server = dbus_audio_set_server;\n     k->driver = &dbus_audio_driver;\n }\n@@ -734,6 +735,7 @@ static const TypeInfo audio_types[] = {\n         .name = TYPE_AUDIO_DBUS,\n         .parent = TYPE_AUDIO_MIXENG_BACKEND,\n         .instance_size = sizeof(AudioDbus),\n+        .instance_finalize = audio_dbus_finalize,\n         .class_init = audio_dbus_class_init,\n     },\n };\n",
    "prefixes": [
        "42/85"
    ]
}