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msdk: make sure child context is destroyed first

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The parent context shares some resources with child context, so the
child context should be destroyed first, otherwise the command below
will trigger a segmentation fault

$> gst-launch-1.0 videotestsrc num-buffers=100 ! msdkh264enc ! \
msdkh264dec ! fakesink videotestsrc num-buffers=50 ! \
msdkh264enc ! msdkh264dec ! fakesink

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2435>
This commit is contained in:
Haihao Xiang 2021-07-18 00:51:04 +08:00
parent a096207f85
commit c7be05cc38
1 changed files with 5 additions and 4 deletions
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9
sys/msdk/gstmsdkcontext.c
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@ -47,12 +47,12 @@ struct _GstMsdkContextPrivate
MsdkSession session;
GList *cached_alloc_responses;
gboolean hardware;
gboolean is_joined;
gboolean has_frame_allocator;
GstMsdkContextJobType job_type;
gint shared_async_depth;
GMutex mutex;
GList *child_session_list;
GstMsdkContext *parent_context;
#ifndef _WIN32
gint fd;
VADisplay dpy;
@ -267,9 +267,10 @@ gst_msdk_context_finalize (GObject * obj)
GstMsdkContextPrivate *priv = context->priv;
/* child sessions will be closed when the parent session is closed */
if (priv->is_joined)
if (priv->parent_context) {
gst_object_unref (priv->parent_context);
goto done;
else
} else
g_list_free_full (priv->child_session_list, release_child_session);
msdk_close_session (&priv->session);
@ -389,7 +390,6 @@ gst_msdk_context_new_with_parent (GstMsdkContext * parent)
/* Set loader to NULL for child session */
priv->session.loader = NULL;
priv->session.session = child_msdk_session.session;
priv->is_joined = TRUE;
priv->hardware = parent_priv->hardware;
priv->job_type = parent_priv->job_type;
parent_priv->child_session_list =
@ -398,6 +398,7 @@ gst_msdk_context_new_with_parent (GstMsdkContext * parent)
priv->dpy = parent_priv->dpy;
priv->fd = parent_priv->fd;
#endif
priv->parent_context = gst_object_ref (parent);
return obj;
}