IVGCVSW-2874 Add DequantizeLayer and no-op factory method

*Add Dequantize layer to the frontend
*Add Serializer and Deserializer for Dequantize

Change-Id: Ide2647b9e0348d599deb97e61ca4bf66e2f17fc0
Signed-off-by: Nattapat Chaimanowong <nattapat.chaimanowong@arm.com>

5 files changed, 25 insertions, 1 deletions

diff --git a/include/armnn/ILayerSupport.hpp b/include/armnn/ILayerSupport.hpp
index 4794a219e7..fe440719b0 100644
--- a/include/armnn/ILayerSupport.hpp
+++ b/include/armnn/ILayerSupport.hpp
@@ -77,6 +77,10 @@ public:
                      const Optional<TensorInfo>& biases,
                      Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const = 0;
 
+    virtual bool IsDequantizeSupported(const TensorInfo& input,
+                                       const TensorInfo& output,
+                                       Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const = 0;
+
     virtual bool IsDetectionPostProcessSupported(
                      const TensorInfo& input0,
                      const TensorInfo& input1,
diff --git a/include/armnn/ILayerVisitor.hpp b/include/armnn/ILayerVisitor.hpp
index a39cbd10b9..e23cf5e6dd 100644
--- a/include/armnn/ILayerVisitor.hpp
+++ b/include/armnn/ILayerVisitor.hpp
@@ -95,6 +95,13 @@ public:
                                                   const Optional<ConstTensor>& biases,
                                                   const char* name = nullptr) = 0;
 
+    /// Function that a Dequantize layer should call back to when its
+    /// Accept(ILayerVisitor&) function is invoked.
+    /// @param layer - pointer to the layer which is calling back to this visit function.
+    /// @param name - Optional name for the layer.
+    virtual void VisitDequantizeLayer(const IConnectableLayer* layer,
+                                      const char* name = nullptr) = 0;
+
     /// Function that a Detection PostProcess layer should call back to when its
     /// Accept(ILayerVisitor&) function is invoked.
     /// @param layer - pointer to the layer which is calling back to this visit function.
diff --git a/include/armnn/INetwork.hpp b/include/armnn/INetwork.hpp
index 7c1fbdbd49..5a9d4f246e 100644
--- a/include/armnn/INetwork.hpp
+++ b/include/armnn/INetwork.hpp
@@ -147,6 +147,10 @@ public:
         const ConstTensor& biases,
         const char* name = nullptr) = 0;
 
+    /// Adds a Dequantize layer to the network.
+    /// @return - Interface for configuring the layer.
+    virtual IConnectableLayer* AddDequantizeLayer(const char* name = nullptr) = 0;
+
     /// Adds a Detection PostProcess layer to the network.
     /// @param descriptor - Description of the Detection PostProcess layer.
     /// @param anchors - Tensor for anchors.
diff --git a/include/armnn/LayerSupport.hpp b/include/armnn/LayerSupport.hpp
index 7b9343b5d6..7c6bc1372a 100644
--- a/include/armnn/LayerSupport.hpp
+++ b/include/armnn/LayerSupport.hpp
@@ -96,6 +96,13 @@ bool IsDepthwiseConvolutionSupported(const BackendId& backend,
                                      size_t reasonIfUnsupportedMaxLength = 1024);
 
 /// Deprecated in favor of IBackend and ILayerSupport interfaces
+bool IsDequantizeSupported(const BackendId& backend,
+                           const TensorInfo& input,
+                           const TensorInfo& output,
+                           char* reasonIfUnsupported = nullptr,
+                           size_t reasonIfUnsupportedMaxLength = 1024);
+
+/// Deprecated in favor of IBackend and ILayerSupport interfaces
 bool IsDivisionSupported(const BackendId& backend,
                          const TensorInfo& input0,
                          const TensorInfo& input1,
diff --git a/include/armnn/LayerVisitorBase.hpp b/include/armnn/LayerVisitorBase.hpp
index d30005f0ed..a5459e1a32 100644
--- a/include/armnn/LayerVisitorBase.hpp
+++ b/include/armnn/LayerVisitorBase.hpp
@@ -45,6 +45,9 @@ public:
                                           const Optional<ConstTensor>&,
                                           const char*) override { DefaultPolicy::Apply(); }
 
+    void VisitDequantizeLayer(const IConnectableLayer*,
+                              const char*) override { DefaultPolicy::Apply(); }
+
     void VisitDetectionPostProcessLayer(const IConnectableLayer*,
                                         const DetectionPostProcessDescriptor&,
                                         const ConstTensor&,
@@ -175,4 +178,3 @@ public:
 };
 
 } //namespace armnn
-