Moving m_export_mode flag definition on application level.

In case of we don't need exported frames (pipeline without rendering),
application still set export_mode flag to PRIME
and this led to DEVICE_FAIL run2run issues.
Behavior have been fixed and issue goes away.

Issue: MDP-50654
(cherry picked from commit 98dc339)

samples/sample_common/src/vaapi_allocator.cpp

@@ -124,10 +124,6 @@ mfxStatus vaapiFrameAllocator::Init(mfxAllocatorParams *pParams)
     m_dpy = p_vaapiParams->m_dpy;
     m_export_mode = p_vaapiParams->m_export_mode;
     m_exporter = p_vaapiParams->m_exporter;
-#if defined(LIBVA_WAYLAND_SUPPORT) || defined (ENABLE_V4L2_SUPPORT)|| defined (X11_DRI3_SUPPORT)
-    // TODO this should be done on application level via allocator parameters!!
-    m_export_mode = vaapiAllocatorParams::PRIME;
-#endif
     return MFX_ERR_NONE;
 }
 

samples/sample_encode/src/pipeline_encode.cpp

@@ -999,6 +999,9 @@ mfxStatus CEncodingPipeline::CreateAllocator()
         MSDK_CHECK_POINTER(p_vaapiAllocParams, MFX_ERR_MEMORY_ALLOC);
 
         p_vaapiAllocParams->m_dpy = (VADisplay)hdl;
+#ifdef ENABLE_V4L2_SUPPORT
+        p_vaapiAllocParams->m_export_mode = vaapiAllocatorParams::PRIME;
+#endif
         m_pmfxAllocatorParams = p_vaapiAllocParams;
 
         /* In case of video memory we must provide MediaSDK with external allocator

samples/sample_multi_transcode/src/sample_multi_transcode.cpp

@@ -111,7 +111,10 @@ mfxStatus Launcher::Init(int argc, msdk_char *argv[])
                 CVAAPIDeviceDRM* drmdev = dynamic_cast<CVAAPIDeviceDRM*>(m_hwdev.get());
                 pVAAPIParams->m_export_mode = vaapiAllocatorParams::CUSTOM_FLINK;
                 pVAAPIParams->m_exporter = dynamic_cast<vaapiAllocatorParams::Exporter*>(drmdev->getRenderer());
-
+            }
+            else if (params.libvaBackend == MFX_LIBVA_X11)
+            {
+                pVAAPIParams->m_export_mode = vaapiAllocatorParams::PRIME;
             }
 #endif
 #if defined(LIBVA_WAYLAND_SUPPORT)