[Media Common] Add WA for Decode Open Source Test

The xe3p_lpm vdenc is not yet available in the open source build. As a temporary fix, the xe3_lpm vdenc is used for open source decode test.

Author: LhGu

media_softlet/media_interface/media_interfaces_nvl/media_interfaces_nvls.cpp

@@ -44,6 +44,8 @@ Copyright (c) 2026, Intel Corporation
 #ifdef _MEDIA_RESERVED
 #include "mhw_vdbox_aqm_impl_xe3p_lpm.h"
 #include "mhw_vdbox_vdenc_impl_xe3p_lpm.h"
+#else
+#include "mhw_vdbox_vdenc_impl_xe3_lpm.h" // Temporary WA for decode open source test. Remove after xe3p_lpm VDEnc is available.
 #endif
 #include "huc_kernel_source_xe3p_lpm_base.h"
 
@@ -254,6 +256,15 @@ MOS_STATUS MhwInterfacesNvl_Xe3G::Initialize(
         auto ptr = std::make_shared<mhw::vdbox::vdenc::xe3p_lpm_base::xe3p_lpm::Impl>(osInterface);
         m_vdencItf = std::static_pointer_cast<mhw::vdbox::vdenc::Itf>(ptr);
     }
+#else
+    // The xe3p_lpm vdenc is not yet available in the open source build.
+    // As a temporary workaround, the xe3_lpm vdenc is used for open source decode test.
+    // TODO: Remove this workaround once the xe3p_lpm vdenc is ready in open source.
+    if (params.Flags.m_vdboxAll || params.Flags.m_vdenc)
+    {
+        auto ptr = std::make_shared<mhw::vdbox::vdenc::xe3_lpm_base::xe3_lpm::Impl>(osInterface);
+        m_vdencItf = std::static_pointer_cast<mhw::vdbox::vdenc::Itf>(ptr);
+    }
 #endif
     if (params.Flags.m_blt)
     {