Changes made to the tensorflow source to enable custom operations

tf_changes.diff

diff --git a/tensorflow/lite/kernels/internal/BUILD b/tensorflow/lite/kernels/internal/BUILD
index 4be3226938..6bc39a7194 100644
--- a/tensorflow/lite/kernels/internal/BUILD
+++ b/tensorflow/lite/kernels/internal/BUILD
@@ -37,6 +37,18 @@ NEON_FLAGS_IF_APPLICABLE = select({
     ],
 })
 
+cc_library(
+    name = "common",
+    srcs = [],
+    hdrs = ["common.h"],
+    copts = tflite_copts(),
+    deps = [
+        ":cpu_check",
+        ":types",
+        "@gemmlowp//:fixedpoint",
+    ],
+)
+
 cc_library(
     name = "types",
     srcs = [],
diff --git a/tensorflow/lite/python/interpreter_wrapper/BUILD b/tensorflow/lite/python/interpreter_wrapper/BUILD
index 767a9fc476..c568ed4ccb 100644
--- a/tensorflow/lite/python/interpreter_wrapper/BUILD
+++ b/tensorflow/lite/python/interpreter_wrapper/BUILD
@@ -16,7 +16,10 @@ cc_library(
         "//third_party/py/numpy:headers",
         "//third_party/python_runtime:headers",
         "@com_google_absl//absl/memory",
-    ],
+	"//tensorflow/lite/python/custom_ops:max_pool_argmax",
+	"//tensorflow/lite/python/custom_ops:max_unpooling",
+   	"//tensorflow/lite/python/custom_ops:transpose_conv_bias",
+	],
 )
 
 tf_py_wrap_cc(
diff --git a/tensorflow/lite/python/interpreter_wrapper/interpreter_wrapper.cc b/tensorflow/lite/python/interpreter_wrapper/interpreter_wrapper.cc
index d14af439ec..bb9a3393d0 100644
--- a/tensorflow/lite/python/interpreter_wrapper/interpreter_wrapper.cc
+++ b/tensorflow/lite/python/interpreter_wrapper/interpreter_wrapper.cc
@@ -22,6 +22,11 @@ limitations under the License.
 #include "tensorflow/lite/kernels/register.h"
 #include "tensorflow/lite/model.h"
 
+#include "tensorflow/lite/python/custom_ops/max_pool_argmax.h"
+#include "tensorflow/lite/python/custom_ops/max_unpooling.h"
+#include "tensorflow/lite/python/custom_ops/transpose_conv_bias.h"
+
+
 // Disallow Numpy 1.7 deprecated symbols.
 #define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION
 
@@ -198,6 +203,13 @@ InterpreterWrapper* InterpreterWrapper::CreateInterpreterWrapper(
   }
 
   auto resolver = absl::make_unique<tflite::ops::builtin::BuiltinOpResolver>();
+  resolver->AddCustom("MaxPoolingWithArgmax2D",
+            tflite_operations::RegisterMaxPoolingWithArgmax2D());
+  resolver->AddCustom("MaxUnpooling2D", 
+            tflite_operations::RegisterMaxUnpooling2D());
+  resolver->AddCustom("Convolution2DTransposeBias",
+            tflite_operations::RegisterConvolution2DTransposeBias());
+
   auto interpreter = CreateInterpreter(model.get(), *resolver);
   if (!interpreter) {
     *error_msg = error_reporter->message();


# CUSTOM BUILD file in the custom_ops directory

# Copyright 2019 The MediaPipe Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
package(
    default_visibility = ["//visibility:public"],
)


cc_library(
    name = "max_pool_argmax",
    srcs = ["max_pool_argmax.cc"],
    hdrs = ["max_pool_argmax.h"],
    deps = [
        "//tensorflow/lite/kernels:kernel_util",
        "//tensorflow/lite/kernels:padding",
        "//tensorflow/lite/kernels/internal:common",
        "//tensorflow/lite/kernels/internal:tensor",
        "//tensorflow/lite/kernels/internal:tensor_utils",
    ],
)

cc_library(
    name = "max_unpooling",
    srcs = ["max_unpooling.cc"],
    hdrs = ["max_unpooling.h"],
    deps = [
        "//tensorflow/lite/kernels:kernel_util",
        "//tensorflow/lite/kernels:padding",
        "//tensorflow/lite/kernels/internal:common",
        "//tensorflow/lite/kernels/internal:tensor",
        "//tensorflow/lite/kernels/internal:tensor_utils",
    ],
)

cc_library(
    name = "transpose_conv_bias",
    srcs = ["transpose_conv_bias.cc"],
    hdrs = ["transpose_conv_bias.h"],
    deps = [
        "//tensorflow/lite/kernels:kernel_util",
        "//tensorflow/lite/kernels:padding",
        "//tensorflow/lite/kernels/internal:tensor",
        "//tensorflow/lite/kernels/internal:tensor_utils",
        "//tensorflow/lite/kernels/internal:types",
    ],
)

in the tensorflow/lite/python/interpreter_wrapper/interpreter_wrapper.cc

tflite_operations::RegisterMaxUnpooling2D()

should be mediapipe::tflite_operations::RegisterMaxUnpooling2D()

thank you!