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GET /api/patches/2196850/?format=api
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{
    "id": 2196850,
    "url": "http://patchwork.ozlabs.org/api/patches/2196850/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260216-audio-v1-48-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-v1-48-e676662e4514@redhat.com>",
    "list_archive_url": null,
    "date": "2026-02-16T11:15:37",
    "name": "[48/85] audio/pa: convert to QOM lifecycle methods",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "ce0604f066de1619e19424c8750cad34e78500ee",
    "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-v1-48-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/2196850/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2196850/checks/",
    "tags": {},
    "related": [],
    "headers": {
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        ],
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        "From": "=?utf-8?q?Marc-Andr=C3=A9_Lureau?= <marcandre.lureau@redhat.com>",
        "Date": "Mon, 16 Feb 2026 12:15:37 +0100",
        "Subject": "[PATCH 48/85] audio/pa: convert to QOM lifecycle methods",
        "MIME-Version": "1.0",
        "Content-Type": "text/plain; charset=\"utf-8\"",
        "Content-Transfer-Encoding": "8bit",
        "Message-Id": "<20260216-audio-v1-48-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 PulseAudio backend from the legacy driver init/fini\ncallbacks to proper QOM realize and finalize methods.\n\nThe paaudio struct fields are now embedded directly in the AudioPa\nQOM object instead of being allocated separately as drv_opaque. This\nallows accessing the backend state through proper QOM type casting\nwith AUDIO_PA() rather than casting drv_opaque pointers.\n\nThe PulseAudio connection is now managed through the QOM lifecycle,\nwith the connection reference acquired in realize and released in\nfinalize.\n\nSigned-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>\nReviewed-by: Mark Cave-Ayland <mark.caveayland@nutanix.com>\n---\n audio/paaudio.c | 109 +++++++++++++++++++++++++++++---------------------------\n 1 file changed, 57 insertions(+), 52 deletions(-)",
    "diff": "diff --git a/audio/paaudio.c b/audio/paaudio.c\nindex 331da4f2ed6..97e6c0d1794 100644\n--- a/audio/paaudio.c\n+++ b/audio/paaudio.c\n@@ -14,19 +14,10 @@\n #define TYPE_AUDIO_PA \"audio-pa\"\n OBJECT_DECLARE_SIMPLE_TYPE(AudioPa, AUDIO_PA)\n \n-struct AudioPa {\n-    AudioMixengBackend parent_obj;\n-};\n+static AudioBackendClass *audio_pa_parent_class;\n \n static struct audio_driver pa_audio_driver;\n \n-static void audio_pa_class_init(ObjectClass *klass, const void *data)\n-{\n-    AudioMixengBackendClass *k = AUDIO_MIXENG_BACKEND_CLASS(klass);\n-\n-    k->driver = &pa_audio_driver;\n-}\n-\n typedef struct PAConnection {\n     char *server;\n     int refcount;\n@@ -36,18 +27,19 @@ typedef struct PAConnection {\n     pa_context *context;\n } PAConnection;\n \n-static QTAILQ_HEAD(PAConnectionHead, PAConnection) pa_conns =\n-    QTAILQ_HEAD_INITIALIZER(pa_conns);\n+struct AudioPa {\n+    AudioMixengBackend parent_obj;\n \n-typedef struct {\n-    Audiodev *dev;\n     PAConnection *conn;\n-} paaudio;\n+};\n+\n+static QTAILQ_HEAD(PAConnectionHead, PAConnection) pa_conns =\n+    QTAILQ_HEAD_INITIALIZER(pa_conns);\n \n typedef struct {\n     HWVoiceOut hw;\n     pa_stream *stream;\n-    paaudio *g;\n+    AudioPa *g;\n } PAVoiceOut;\n \n typedef struct {\n@@ -55,7 +47,7 @@ typedef struct {\n     pa_stream *stream;\n     const void *read_data;\n     size_t read_length;\n-    paaudio *g;\n+    AudioPa *g;\n } PAVoiceIn;\n \n static void qpa_conn_fini(PAConnection *c);\n@@ -529,23 +521,25 @@ fail:\n static int qpa_init_out(HWVoiceOut *hw, struct audsettings *as,\n                         void *drv_opaque)\n {\n+    AudioMixengBackend *amb = hw->s;\n+    AudioPa *apa = AUDIO_PA(amb);\n     int error;\n     pa_sample_spec ss;\n     pa_buffer_attr ba;\n     struct audsettings obt_as = *as;\n     PAVoiceOut *pa = (PAVoiceOut *) hw;\n-    paaudio *g = pa->g = drv_opaque;\n-    AudiodevPaOptions *popts = &g->dev->u.pa;\n+    AudiodevPaOptions *popts = &amb->dev->u.pa;\n     AudiodevPaPerDirectionOptions *ppdo = popts->out;\n-    PAConnection *c = g->conn;\n+    PAConnection *c = apa->conn;\n \n+    pa->g = apa;\n     ss.format = audfmt_to_pa (as->fmt, as->endianness);\n     ss.channels = as->nchannels;\n     ss.rate = as->freq;\n \n     ba.tlength = pa_usec_to_bytes(ppdo->latency, &ss);\n     ba.minreq = pa_usec_to_bytes(MIN(ppdo->latency >> 2,\n-                                     (g->dev->timer_period >> 2) * 3), &ss);\n+                                     (amb->dev->timer_period >> 2) * 3), &ss);\n     ba.maxlength = -1;\n     ba.prebuf = -1;\n \n@@ -553,7 +547,7 @@ static int qpa_init_out(HWVoiceOut *hw, struct audsettings *as,\n \n     pa->stream = qpa_simple_new (\n         c,\n-        ppdo->stream_name ?: g->dev->id,\n+        ppdo->stream_name ?: amb->dev->id,\n         PA_STREAM_PLAYBACK,\n         ppdo->name,\n         &ss,\n@@ -578,23 +572,25 @@ static int qpa_init_out(HWVoiceOut *hw, struct audsettings *as,\n \n static int qpa_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)\n {\n+    AudioMixengBackend *amb = hw->s;\n+    AudioPa *apa = AUDIO_PA(amb);\n     int error;\n     pa_sample_spec ss;\n     pa_buffer_attr ba;\n     struct audsettings obt_as = *as;\n     PAVoiceIn *pa = (PAVoiceIn *) hw;\n-    paaudio *g = pa->g = drv_opaque;\n-    AudiodevPaOptions *popts = &g->dev->u.pa;\n+    AudiodevPaOptions *popts = &amb->dev->u.pa;\n     AudiodevPaPerDirectionOptions *ppdo = popts->in;\n-    PAConnection *c = g->conn;\n+    PAConnection *c = apa->conn;\n \n+    pa->g = apa;\n     ss.format = audfmt_to_pa (as->fmt, as->endianness);\n     ss.channels = as->nchannels;\n     ss.rate = as->freq;\n \n-    ba.fragsize = pa_usec_to_bytes((g->dev->timer_period >> 1) * 3, &ss);\n+    ba.fragsize = pa_usec_to_bytes((amb->dev->timer_period >> 1) * 3, &ss);\n     ba.maxlength = pa_usec_to_bytes(\n-        MAX(ppdo->latency, g->dev->timer_period * 3), &ss);\n+        MAX(ppdo->latency, amb->dev->timer_period * 3), &ss);\n     ba.minreq = -1;\n     ba.prebuf = -1;\n \n@@ -602,7 +598,7 @@ static int qpa_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)\n \n     pa->stream = qpa_simple_new (\n         c,\n-        ppdo->stream_name ?: g->dev->id,\n+        ppdo->stream_name ?: amb->dev->id,\n         PA_STREAM_RECORD,\n         ppdo->name,\n         &ss,\n@@ -834,15 +830,20 @@ fail:\n     return NULL;\n }\n \n-static void *qpa_audio_init(Audiodev *dev, Error **errp)\n+static bool\n+audio_pa_realize(AudioBackend *abe, Audiodev *dev, Error **errp)\n {\n-    paaudio *g;\n+    AudioPa *apa = AUDIO_PA(abe);\n     AudiodevPaOptions *popts = &dev->u.pa;\n     const char *server;\n     PAConnection *c;\n \n     assert(dev->driver == AUDIODEV_DRIVER_PA);\n \n+    if (!audio_pa_parent_class->realize(abe, dev, errp)) {\n+        return false;\n+    }\n+\n     if (!popts->server) {\n         char pidfile[64];\n         char *runtime;\n@@ -851,42 +852,38 @@ static void *qpa_audio_init(Audiodev *dev, Error **errp)\n         runtime = getenv(\"XDG_RUNTIME_DIR\");\n         if (!runtime) {\n             error_setg(errp, \"XDG_RUNTIME_DIR not set\");\n-            return NULL;\n+            return false;\n         }\n         snprintf(pidfile, sizeof(pidfile), \"%s/pulse/pid\", runtime);\n         if (stat(pidfile, &st) != 0) {\n             error_setg_errno(errp, errno, \"could not stat pidfile %s\", pidfile);\n-            return NULL;\n+            return false;\n         }\n     }\n \n     qpa_validate_per_direction_opts(dev, popts->in);\n     qpa_validate_per_direction_opts(dev, popts->out);\n \n-    g = g_new0(paaudio, 1);\n     server = popts->server;\n-\n-    g->dev = dev;\n-\n     QTAILQ_FOREACH(c, &pa_conns, list) {\n         if (server == NULL || c->server == NULL ?\n             server == c->server :\n             strcmp(server, c->server) == 0) {\n-            g->conn = c;\n+            apa->conn = c;\n             break;\n         }\n     }\n-    if (!g->conn) {\n-        g->conn = qpa_conn_init(server);\n+    if (!apa->conn) {\n+        apa->conn = qpa_conn_init(server);\n     }\n-    if (!g->conn) {\n-        g_free(g);\n+    if (!apa->conn) {\n         error_setg(errp, \"could not connect to PulseAudio server\");\n-        return NULL;\n+        return false;\n     }\n \n-    ++g->conn->refcount;\n-    return g;\n+    ++apa->conn->refcount;\n+\n+    return true;\n }\n \n static void qpa_conn_fini(PAConnection *c)\n@@ -908,16 +905,14 @@ static void qpa_conn_fini(PAConnection *c)\n     g_free(c);\n }\n \n-static void qpa_audio_fini (void *opaque)\n+static void audio_pa_finalize(Object *obj)\n {\n-    paaudio *g = opaque;\n-    PAConnection *c = g->conn;\n+    AudioPa *apa = AUDIO_PA(obj);\n+    PAConnection *c = apa->conn;\n \n-    if (--c->refcount == 0) {\n+    if (c && --c->refcount == 0) {\n         qpa_conn_fini(c);\n     }\n-\n-    g_free(g);\n }\n \n static struct audio_pcm_ops qpa_pcm_ops = {\n@@ -939,8 +934,6 @@ static struct audio_pcm_ops qpa_pcm_ops = {\n \n static struct audio_driver pa_audio_driver = {\n     .name           = \"pa\",\n-    .init           = qpa_audio_init,\n-    .fini           = qpa_audio_fini,\n     .pcm_ops        = &qpa_pcm_ops,\n     .max_voices_out = INT_MAX,\n     .max_voices_in  = INT_MAX,\n@@ -948,12 +941,24 @@ static struct audio_driver pa_audio_driver = {\n     .voice_size_in  = sizeof (PAVoiceIn),\n };\n \n+static void audio_pa_class_init(ObjectClass *klass, const void *data)\n+{\n+    AudioBackendClass *b = AUDIO_BACKEND_CLASS(klass);\n+    AudioMixengBackendClass *k = AUDIO_MIXENG_BACKEND_CLASS(klass);\n+\n+    audio_pa_parent_class = AUDIO_BACKEND_CLASS(object_class_get_parent(klass));\n+\n+    b->realize = audio_pa_realize;\n+    k->driver = &pa_audio_driver;\n+}\n+\n static const TypeInfo audio_types[] = {\n     {\n         .name = TYPE_AUDIO_PA,\n         .parent = TYPE_AUDIO_MIXENG_BACKEND,\n         .instance_size = sizeof(AudioPa),\n         .class_init = audio_pa_class_init,\n+        .instance_finalize = audio_pa_finalize,\n     },\n };\n \n",
    "prefixes": [
        "48/85"
    ]
}