From 245d64c60d0ea30f5080ff53225b5169927e24d6 Mon Sep 17 00:00:00 2001
From: Matthew Bentham <Matthew.Bentham@arm.com>
Date: Mon, 2 Dec 2019 12:59:43 +0000
Subject: Work in progress of python bindings for Arm NN

Not built or tested in any way

Signed-off-by: Matthew Bentham <Matthew.Bentham@arm.com>
Change-Id: Ie7f92b529aa5087130f0c5cc8c17db1581373236
---
 .../pyarmnn/src/pyarmnn/swig/armnn_tfliteparser.i  | 132 +++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 python/pyarmnn/src/pyarmnn/swig/armnn_tfliteparser.i

(limited to 'python/pyarmnn/src/pyarmnn/swig/armnn_tfliteparser.i')

diff --git a/python/pyarmnn/src/pyarmnn/swig/armnn_tfliteparser.i b/python/pyarmnn/src/pyarmnn/swig/armnn_tfliteparser.i
new file mode 100644
index 0000000000..fbe5fd7720
--- /dev/null
+++ b/python/pyarmnn/src/pyarmnn/swig/armnn_tfliteparser.i
@@ -0,0 +1,132 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+%module pyarmnn_tfliteparser
+%{
+#include "armnnTfLiteParser/ITfLiteParser.hpp"
+#include "armnn/Types.hpp"
+#include "armnn/INetwork.hpp"
+%}
+
+//typemap definitions and other common stuff
+%include "standard_header.i"
+
+namespace std {
+   %template(BindingPointInfo)     pair<int, armnn::TensorInfo>;
+   %template(MapStringTensorShape) map<std::string, armnn::TensorShape>;
+   %template(StringVector)         vector<string>;
+}
+
+namespace armnnTfLiteParser
+{
+%feature("docstring",
+"
+Interface for creating a parser object using TfLite (https://www.tensorflow.org/lite) tflite files.
+
+Parsers are used to automatically construct Arm NN graphs from model files.
+
+") ITfLiteParser;
+%nodefaultctor ITfLiteParser;
+class ITfLiteParser
+{
+public:
+    %feature("docstring",
+        "
+        Retrieve binding info (layer id and tensor info) for the network input identified by the given layer name and subgraph id.
+        Args:
+            subgraphId (int): The subgraph id.
+            name (str): Name of the input.
+
+        Returns:
+            tuple: (`int`, `TensorInfo`).
+        ") GetNetworkInputBindingInfo;
+    std::pair<int, armnn::TensorInfo> GetNetworkInputBindingInfo(size_t subgraphId, const std::string& name);
+
+    %feature("docstring",
+        "
+        Retrieve binding info (layer id and tensor info) for the network output identified by the given layer name and subgraph id.
+
+        Args:
+            subgraphId (int): The subgraphID.
+            name (str): Name of the output.
+
+        Returns:
+            tuple: (`int`, `TensorInfo`).
+        ") GetNetworkOutputBindingInfo;
+    std::pair<int, armnn::TensorInfo> GetNetworkOutputBindingInfo(size_t subgraphId, const std::string& name);
+
+    %feature("docstring",
+        "
+        Return the number of subgraphs in the parsed model.
+        Returns:
+            int: The number of subgraphs.
+        ") GetSubgraphCount;
+    size_t GetSubgraphCount();
+
+     %feature("docstring",
+        "
+        Return the input tensor names for a given subgraph.
+
+        Args:
+            subgraphId (int): The subgraph id.
+
+        Returns:
+            list: A list of the input tensor names for the given model.
+        ") GetSubgraphInputTensorNames;
+    std::vector<std::string> GetSubgraphInputTensorNames(size_t subgraphId);
+
+    %feature("docstring",
+        "
+        Return the output tensor names for a given subgraph.
+
+        Args:
+            subgraphId (int): The subgraph id
+
+        Returns:
+            list: A list of the output tensor names for the given model.
+        ") GetSubgraphOutputTensorNames;
+    std::vector<std::string> GetSubgraphOutputTensorNames(size_t subgraphId);
+};
+
+%extend ITfLiteParser {
+// This is not a substitution of the default constructor of the Armnn class. It tells swig to create custom __init__
+// method for ITfLiteParser python object that will use static factory method to do the job.
+
+    ITfLiteParser() {
+        return armnnTfLiteParser::ITfLiteParser::CreateRaw();
+    }
+
+// The following does not replace a real destructor of the Armnn class.
+// It creates a functions that will be called when swig object goes out of the scope to clean resources.
+// so the user doesn't need to call ITfLiteParser::Destroy himself.
+// $self` is a pointer to extracted ArmNN ITfLiteParser object.
+
+    ~ITfLiteParser() {
+        armnnTfLiteParser::ITfLiteParser::Destroy($self);
+    }
+
+    %feature("docstring",
+    "
+    Create the network from a flatbuffers binary file.
+
+    Args:
+        graphFile (str): Path to the tflite model to be parsed.
+
+    Returns:
+        INetwork: Parsed network.
+
+    Raises:
+        RuntimeError: If model file was not found.
+    ") CreateNetworkFromBinaryFile;
+
+    %newobject CreateNetworkFromBinaryFile;
+    armnn::INetwork* CreateNetworkFromBinaryFile(const char* graphFile) {
+        return $self->CreateNetworkFromBinaryFile(graphFile).release();
+    }
+
+}
+
+}
+// Clear exception typemap.
+%exception;
-- 
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