d3d11convert: Passthrough allocation query on same caps

Since d3d11convert and its variant elements does not enable basetransform's
passthrough, passthrough allocation query needs to be handled
manually in order to respect downstream element's min/max buffer
requirement.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5297>

diff --git a/subprojects/gst-plugins-bad/sys/d3d11/gstd3d11convert.cpp b/subprojects/gst-plugins-bad/sys/d3d11/gstd3d11convert.cpp
index 27997bbecb83c2e9495df04d2e2bd8ef4f268dda..d4887e73f96aab610e4e0f233a11fe4e9f1cbd5e 100644 (file)
--- a/subprojects/gst-plugins-bad/sys/d3d11/gstd3d11convert.cpp
+++ b/subprojects/gst-plugins-bad/sys/d3d11/gstd3d11convert.cpp
@@ -1189,6 +1189,7 @@ static gboolean
 gst_d3d11_base_convert_propose_allocation (GstBaseTransform * trans,
     GstQuery * decide_query, GstQuery * query)
 {
+  GstD3D11BaseConvert *self = GST_D3D11_BASE_CONVERT (trans);
   GstD3D11BaseFilter *filter = GST_D3D11_BASE_FILTER (trans);
   GstVideoInfo info;
   GstBufferPool *pool = NULL;
@@ -1205,8 +1206,18 @@ gst_d3d11_base_convert_propose_allocation (GstBaseTransform * trans,
   ID3D11Device *device_handle;
 
   if (!GST_BASE_TRANSFORM_CLASS (parent_class)->propose_allocation (trans,
-          decide_query, query))
+          decide_query, query)) {
     return FALSE;
+  }
+
+  if (self->same_caps) {
+    if (!gst_pad_peer_query (trans->srcpad, query))
+      return FALSE;
+
+    gst_query_add_allocation_meta (query,
+        GST_VIDEO_CROP_META_API_TYPE, nullptr);
+    return TRUE;
+  }
 
   gst_query_parse_allocation (query, &caps, NULL);