diff --git a/girs/GstGL-1.0.gir b/girs/GstGL-1.0.gir
index 1ff5ac638a..2626db4479 100644
--- a/girs/GstGL-1.0.gir
+++ b/girs/GstGL-1.0.gir
@@ -7385,6 +7385,32 @@ A #GstGLUpload can be created with gst_gl_upload_new()</doc>
<type name="Gst.Caps" c:type="GstCaps*"/>
</return-value>
</function>
+ <method name="fixate_caps" c:identifier="gst_gl_upload_fixate_caps" version="1.24">
+ <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.c">Fixate the @othercaps based on the information of the @caps.</doc>
+ <source-position filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.h"/>
+ <return-value transfer-ownership="full">
+ <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.c">the fixated caps</doc>
+ <type name="Gst.Caps" c:type="GstCaps*"/>
+ </return-value>
+ <parameters>
+ <instance-parameter name="upload" transfer-ownership="none">
+ <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.c">a #GstGLUpload</doc>
+ <type name="GLUpload" c:type="GstGLUpload*"/>
+ </instance-parameter>
+ <parameter name="direction" transfer-ownership="none">
+ <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.c">the pad #GstPadDirection</doc>
+ <type name="Gst.PadDirection" c:type="GstPadDirection"/>
+ </parameter>
+ <parameter name="caps" transfer-ownership="none">
+ <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.c">a #GstCaps as the reference</doc>
+ <type name="Gst.Caps" c:type="GstCaps*"/>
+ </parameter>
+ <parameter name="othercaps" transfer-ownership="full">
+ <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.c">a #GstCaps to fixate</doc>
+ <type name="Gst.Caps" c:type="GstCaps*"/>
+ </parameter>
+ </parameters>
+ </method>
<method name="get_caps" c:identifier="gst_gl_upload_get_caps">
<source-position filename="../subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.h"/>
<return-value transfer-ownership="none">
diff --git a/subprojects/gst-plugins-base/ext/gl/gstgluploadelement.c b/subprojects/gst-plugins-base/ext/gl/gstgluploadelement.c
index 2a28ed724f..215ee31848 100644
--- a/subprojects/gst-plugins-base/ext/gl/gstgluploadelement.c
+++ b/subprojects/gst-plugins-base/ext/gl/gstgluploadelement.c
@@ -58,11 +58,12 @@ gst_gl_upload_element_prepare_output_buffer (GstBaseTransform * bt,
static GstFlowReturn gst_gl_upload_element_transform (GstBaseTransform * bt,
GstBuffer * buffer, GstBuffer * outbuf);
static gboolean gst_gl_upload_element_stop (GstBaseTransform * bt);
+static GstCaps *gst_gl_upload_element_fixate_caps (GstBaseTransform * bt,
+ GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
static GstStateChangeReturn
gst_gl_upload_element_change_state (GstElement * element,
GstStateChange transition);
-
static GstStaticPadTemplate gst_gl_upload_element_src_pad_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
@@ -110,6 +111,7 @@ gst_gl_upload_element_class_init (GstGLUploadElementClass * klass)
bt_class->prepare_output_buffer = gst_gl_upload_element_prepare_output_buffer;
bt_class->transform = gst_gl_upload_element_transform;
bt_class->stop = gst_gl_upload_element_stop;
+ bt_class->fixate_caps = gst_gl_upload_element_fixate_caps;
element_class->change_state = gst_gl_upload_element_change_state;
@@ -331,6 +333,15 @@ gst_gl_upload_element_transform (GstBaseTransform * bt, GstBuffer * buffer,
return GST_FLOW_OK;
}
+static GstCaps *
+gst_gl_upload_element_fixate_caps (GstBaseTransform * bt,
+ GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
+{
+ GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
+
+ return gst_gl_upload_fixate_caps (upload->upload, direction, caps, othercaps);
+}
+
static GstStateChangeReturn
gst_gl_upload_element_change_state (GstElement * element,
GstStateChange transition)
diff --git a/subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.c b/subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.c
index db1f891594..225d1176e7 100644
--- a/subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.c
+++ b/subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.c
@@ -3526,3 +3526,74 @@ restart:
#undef NEXT_METHOD
}
+
+/**
+ * gst_gl_upload_fixate_caps:
+ * @upload: a #GstGLUpload
+ * @direction: the pad #GstPadDirection
+ * @caps: a #GstCaps as the reference
+ * @othercaps: (transfer full): a #GstCaps to fixate
+ *
+ * Fixate the @othercaps based on the information of the @caps.
+ *
+ * Returns: (transfer full): the fixated caps
+ *
+ * Since: 1.24
+ */
+GstCaps *
+gst_gl_upload_fixate_caps (GstGLUpload * upload, GstPadDirection direction,
+ GstCaps * caps, GstCaps * othercaps)
+{
+ guint n, i;
+ GstGLTextureTarget target;
+ GstCaps *ret_caps = NULL;
+
+ GST_DEBUG_OBJECT (upload, "Fixate caps %" GST_PTR_FORMAT ", using caps %"
+ GST_PTR_FORMAT ", direction is %s.", othercaps, caps,
+ direction == GST_PAD_SRC ? "src" : "sink");
+
+ if (direction == GST_PAD_SRC) {
+ ret_caps = gst_caps_fixate (othercaps);
+ goto out;
+ }
+
+ if (gst_caps_is_fixed (othercaps)) {
+ ret_caps = othercaps;
+ goto out;
+ }
+
+ /* Prefer target 2D->rectangle->oes */
+ for (target = GST_GL_TEXTURE_TARGET_2D;
+ target <= GST_GL_TEXTURE_TARGET_EXTERNAL_OES; target++) {
+ n = gst_caps_get_size (othercaps);
+ for (i = 0; i < n; i++) {
+ GstStructure *s;
+
+ s = gst_caps_get_structure (othercaps, i);
+ if (_structure_check_target (s, 1 << target))
+ break;
+ }
+
+ /* If the target is found, fixate the other fields */
+ if (i < n) {
+ ret_caps = gst_caps_new_empty ();
+ gst_caps_append_structure_full (ret_caps,
+ gst_structure_copy (gst_caps_get_structure (othercaps, i)),
+ gst_caps_features_copy (gst_caps_get_features (othercaps, i)));
+
+ ret_caps = gst_caps_fixate (ret_caps);
+ gst_caps_set_simple (ret_caps, "texture-target", G_TYPE_STRING,
+ gst_gl_texture_target_to_string (target), NULL);
+
+ gst_caps_unref (othercaps);
+
+ goto out;
+ }
+ }
+
+ ret_caps = gst_caps_fixate (othercaps);
+
+out:
+ GST_DEBUG_OBJECT (upload, "Fixate return %" GST_PTR_FORMAT, ret_caps);
+ return ret_caps;
+}
diff --git a/subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.h b/subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.h
index 5911584222..20040c174d 100644
--- a/subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.h
+++ b/subprojects/gst-plugins-base/gst-libs/gst/gl/gstglupload.h
@@ -119,6 +119,12 @@ GstGLUploadReturn gst_gl_upload_perform_with_buffer (GstGLUpload * upload,
GstBuffer * buffer,
GstBuffer ** outbuf_ptr);
+GST_GL_API
+GstCaps * gst_gl_upload_fixate_caps (GstGLUpload * upload,
+ GstPadDirection direction,
+ GstCaps * caps,
+ GstCaps * othercaps);
+
G_END_DECLS
#endif /* __GST_GL_UPLOAD_H__ */