MSDK: Handle context query into the decoder's query function.

The MSDK decoder's query function is not set and it just forwards
all query to its base class. We now need to answer the context
query correctly. Other VA plugins need to query the VA display.

By the way, the current query of "gst.msdk.Context" is also missing.
The other MSDK elements must depend on the bin's context message(
sent in context_propagate()) to set their MsdkContext correctly.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1087>

diff --git a/subprojects/gst-plugins-bad/sys/msdk/gstmsdkdec.c b/subprojects/gst-plugins-bad/sys/msdk/gstmsdkdec.c
index 4ea8222..0f121d7 100644 (file)
--- a/subprojects/gst-plugins-bad/sys/msdk/gstmsdkdec.c
+++ b/subprojects/gst-plugins-bad/sys/msdk/gstmsdkdec.c
@@ -1722,6 +1722,50 @@ gst_msdkdec_finish (GstVideoDecoder * decoder)
   return gst_msdkdec_drain (decoder);
 }
 
+static gboolean
+gst_msdkdec_query (GstVideoDecoder * decoder, GstQuery * query,
+    GstPadDirection dir)
+{
+  GstMsdkDec *thiz = GST_MSDKDEC (decoder);
+  gboolean ret = FALSE;
+
+  switch (GST_QUERY_TYPE (query)) {
+    case GST_QUERY_CONTEXT:{
+      GstMsdkContext *msdk_context = NULL;
+
+      gst_object_replace ((GstObject **) & msdk_context,
+          (GstObject *) thiz->context);
+      ret = gst_msdk_handle_context_query (GST_ELEMENT_CAST (decoder),
+          query, msdk_context);
+      gst_clear_object (&msdk_context);
+      break;
+    }
+    default:
+      if (dir == GST_PAD_SRC) {
+        ret =
+            GST_VIDEO_DECODER_CLASS (parent_class)->src_query (decoder, query);
+      } else {
+        ret =
+            GST_VIDEO_DECODER_CLASS (parent_class)->sink_query (decoder, query);
+      }
+      break;
+  }
+
+  return ret;
+}
+
+static gboolean
+gst_msdkdec_src_query (GstVideoDecoder * decoder, GstQuery * query)
+{
+  return gst_msdkdec_query (decoder, query, GST_PAD_SRC);
+}
+
+static gboolean
+gst_msdkdec_sink_query (GstVideoDecoder * decoder, GstQuery * query)
+{
+  return gst_msdkdec_query (decoder, query, GST_PAD_SINK);
+}
+
 static void
 gst_msdkdec_set_property (GObject * object, guint prop_id, const GValue * value,
     GParamSpec * pspec)
@@ -1880,6 +1924,8 @@ gst_msdkdec_class_init (GstMsdkDecClass * klass)
   decoder_class->drain = GST_DEBUG_FUNCPTR (gst_msdkdec_drain);
   decoder_class->transform_meta =
       GST_DEBUG_FUNCPTR (gst_msdkdec_transform_meta);
+  decoder_class->src_query = GST_DEBUG_FUNCPTR (gst_msdkdec_src_query);
+  decoder_class->sink_query = GST_DEBUG_FUNCPTR (gst_msdkdec_sink_query);
 
   klass->post_configure = GST_DEBUG_FUNCPTR (gst_msdkdec_post_configure);
   klass->preinit_decoder = GST_DEBUG_FUNCPTR (gst_msdkdec_preinit_decoder);