glupload: adjust memory offset calculation for dmabuf buffers

The data in the dmabuf fd may not start from byte 0, therefore
we need to inform EGL about this additional offset.

https://bugzilla.gnome.org/show_bug.cgi?id=779790

diff --git a/gst-libs/gst/gl/gstglupload.c b/gst-libs/gst/gl/gstglupload.c
index 9890acd..f19cd6f 100644 (file)
--- a/gst-libs/gst/gl/gstglupload.c
+++ b/gst-libs/gst/gl/gstglupload.c
@@ -652,7 +652,8 @@ _dma_buf_upload_accept (gpointer impl, GstBuffer * buffer, GstCaps * in_caps,
     /* otherwise create one and cache it */
     dmabuf->eglimage[i] =
         gst_egl_image_from_dmabuf (dmabuf->upload->context,
-        gst_dmabuf_memory_get_fd (mems[i]), in_info, i, mems_skip[i]);
+        gst_dmabuf_memory_get_fd (mems[i]), in_info, i,
+        mems[i]->offset + mems_skip[i]);
 
     if (!dmabuf->eglimage[i])
       return FALSE;