IVGCVSW-5724 Add import tensor handling as ClImportTensorHandleFactory.

* Add new ClImportTensorHandlefactory for tensor import.
* Add unit tests.

Signed-off-by: Colm Donelan <Colm.Donelan@arm.com>
Change-Id: I61884fed65e764ebd6985fe0833e43a7296d0641

1 files changed, 70 insertions, 0 deletions

diff --git a/src/backends/cl/ClImportTensorHandleFactory.hpp b/src/backends/cl/ClImportTensorHandleFactory.hpp
new file mode 100644
index 0000000000..d6550dbeef
--- /dev/null
+++ b/src/backends/cl/ClImportTensorHandleFactory.hpp
@@ -0,0 +1,70 @@
+//
+// Copyright © 2021 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#pragma once
+
+#include <aclCommon/BaseMemoryManager.hpp>
+#include <armnn/MemorySources.hpp>
+#include <armnn/backends/IMemoryManager.hpp>
+#include <armnn/backends/ITensorHandleFactory.hpp>
+
+namespace armnn
+{
+
+constexpr const char* ClImportTensorHandleFactoryId()
+{
+    return "Arm/Cl/ImportTensorHandleFactory";
+}
+
+/**
+ * This factory creates ClTensorHandles that refer to imported memory tensors.
+ */
+class ClImportTensorHandleFactory : public ITensorHandleFactory
+{
+public:
+    static const FactoryId m_Id;
+
+    /**
+     * Create a tensor handle factory for tensors that will be imported or exported.
+     *
+     * @param importFlags
+     * @param exportFlags
+     */
+    ClImportTensorHandleFactory(MemorySourceFlags importFlags, MemorySourceFlags exportFlags)
+        : m_ImportFlags(importFlags)
+        , m_ExportFlags(exportFlags)
+    {}
+
+    std::unique_ptr<ITensorHandle> CreateSubTensorHandle(ITensorHandle& parent,
+                                                         const TensorShape& subTensorShape,
+                                                         const unsigned int* subTensorOrigin) const override;
+
+    std::unique_ptr<ITensorHandle> CreateTensorHandle(const TensorInfo& tensorInfo) const override;
+
+    std::unique_ptr<ITensorHandle> CreateTensorHandle(const TensorInfo& tensorInfo,
+                                                      DataLayout dataLayout) const override;
+
+    std::unique_ptr<ITensorHandle> CreateTensorHandle(const TensorInfo& tensorInfo,
+                                                      const bool IsMemoryManaged) const override;
+
+    std::unique_ptr<ITensorHandle> CreateTensorHandle(const TensorInfo& tensorInfo,
+                                                      DataLayout dataLayout,
+                                                      const bool IsMemoryManaged) const override;
+
+    static const FactoryId& GetIdStatic();
+
+    const FactoryId& GetId() const override;
+
+    bool SupportsSubTensors() const override;
+
+    MemorySourceFlags GetExportFlags() const override;
+
+    MemorySourceFlags GetImportFlags() const override;
+
+private:
+    MemorySourceFlags m_ImportFlags;
+    MemorySourceFlags m_ExportFlags;
+};
+
+}    // namespace armnn
\ No newline at end of file