Opensource ML embedded evaluation kit

Change-Id: I12e807f19f5cacad7cef82572b6dd48252fd61fd
diff --git a/source/use_case/inference_runner/include/TestModel.hpp b/source/use_case/inference_runner/include/TestModel.hpp
new file mode 100644
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+++ b/source/use_case/inference_runner/include/TestModel.hpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+#ifndef INF_RUNNER_TESTMODEL_HPP
+#define INF_RUNNER_TESTMODEL_HPP
+
+#include "Model.hpp"
+
+namespace arm {
+namespace app {
+
+    class TestModel : public Model {
+
+    protected:
+        /** @brief   Gets the reference to op resolver interface class. */
+        const tflite::AllOpsResolver& GetOpResolver() override;
+
+        /** @brief   Adds operations to the op resolver instance, not needed as using AllOpsResolver. */
+        bool EnlistOperations() override {return false;}
+
+        const uint8_t* ModelPointer() override;
+
+        size_t ModelSize() override;
+
+    private:
+
+        /* No need to define individual ops at the cost of extra memory. */
+        tflite::AllOpsResolver _m_opResolver;
+    };
+
+} /* namespace app */
+} /* namespace arm */
+
+#endif /* INF_RUNNER_TESTMODEL_HPP */
\ No newline at end of file
diff --git a/source/use_case/inference_runner/include/UseCaseHandler.hpp b/source/use_case/inference_runner/include/UseCaseHandler.hpp
new file mode 100644
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+++ b/source/use_case/inference_runner/include/UseCaseHandler.hpp
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+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+#ifndef INF_RUNNER_EVT_HANDLER_HPP
+#define INF_RUNNER_EVT_HANDLER_HPP
+
+#include "AppContext.hpp"
+
+namespace arm {
+namespace app {
+
+    /**
+     * @brief       Handles the inference event.
+     * @param[in]   ctx   Pointer to the application context.
+     * @return      true or false based on execution success.
+     **/
+    bool RunInferenceHandler(ApplicationContext& ctx);
+
+} /* namespace app */
+} /* namespace arm */
+
+#endif /* INF_RUNNER_EVT_HANDLER_HPP */
\ No newline at end of file
diff --git a/source/use_case/inference_runner/src/MainLoop.cc b/source/use_case/inference_runner/src/MainLoop.cc
new file mode 100644
index 0000000..b110a24
--- /dev/null
+++ b/source/use_case/inference_runner/src/MainLoop.cc
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+#include "hal.h"                    /* Brings in platform definitions. */
+#include "TestModel.hpp"            /* Model class for running inference. */
+#include "UseCaseHandler.hpp"       /* Handlers for different user options. */
+#include "UseCaseCommonUtils.hpp"   /* Utils functions. */
+
+enum opcodes
+{
+    MENU_OPT_RUN_INF_NEXT = 1,       /* Run on next vector. */
+    MENU_OPT_SHOW_MODEL_INFO,        /* Show model info. */
+};
+
+void main_loop(hal_platform& platform)
+{
+    arm::app::TestModel model;  /* Model wrapper object. */
+
+    /* Load the model. */
+    if (!model.Init()) {
+        printf_err("Failed to initialise model\n");
+        return;
+    }
+
+    /* Instantiate application context. */
+    arm::app::ApplicationContext caseContext;
+
+    caseContext.Set<hal_platform&>("platform", platform);
+    caseContext.Set<arm::app::Model&>("model", model);
+    caseContext.Set<uint32_t>("imgIndex", 0);
+
+    /* Loop. */
+    if (RunInferenceHandler(caseContext)) {
+        info("Inference completed.\n");
+    } else {
+        printf_err("Inference failed.\n");
+    }
+}
diff --git a/source/use_case/inference_runner/src/TestModel.cc b/source/use_case/inference_runner/src/TestModel.cc
new file mode 100644
index 0000000..0926a96
--- /dev/null
+++ b/source/use_case/inference_runner/src/TestModel.cc
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+#include "TestModel.hpp"
+
+#include "hal.h"
+
+const tflite::AllOpsResolver& arm::app::TestModel::GetOpResolver()
+{
+    return this->_m_opResolver;
+}
+
+extern uint8_t* GetModelPointer();
+const uint8_t* arm::app::TestModel::ModelPointer()
+{
+    return GetModelPointer();
+}
+
+extern size_t GetModelLen();
+size_t arm::app::TestModel::ModelSize()
+{
+    return GetModelLen();
+}
\ No newline at end of file
diff --git a/source/use_case/inference_runner/src/UseCaseHandler.cc b/source/use_case/inference_runner/src/UseCaseHandler.cc
new file mode 100644
index 0000000..ac4ea47
--- /dev/null
+++ b/source/use_case/inference_runner/src/UseCaseHandler.cc
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+#include "UseCaseHandler.hpp"
+
+#include "TestModel.hpp"
+#include "UseCaseCommonUtils.hpp"
+#include "hal.h"
+
+#include <cstdlib>
+
+namespace arm {
+namespace app {
+
+    bool RunInferenceHandler(ApplicationContext& ctx)
+    {
+        auto& platform = ctx.Get<hal_platform&>("platform");
+        auto& model = ctx.Get<Model&>("model");
+
+        constexpr uint32_t dataPsnTxtInfStartX = 150;
+        constexpr uint32_t dataPsnTxtInfStartY = 40;
+
+        if (!model.IsInited()) {
+            printf_err("Model is not initialised! Terminating processing.\n");
+            return false;
+        }
+
+        const size_t numInputs = model.GetNumInputs();
+
+        /* Populate each input tensor with random data. */
+        for (size_t inputIndex = 0; inputIndex < numInputs; inputIndex++) {
+
+            TfLiteTensor* inputTensor = model.GetInputTensor(inputIndex);
+
+            debug("Populating input tensor %zu@%p\n", inputIndex, inputTensor);
+            debug("Total input size to be populated: %zu\n", inputTensor->bytes);
+
+            /* Create a random input. */
+            if (inputTensor->bytes > 0) {
+
+                uint8_t* tData = tflite::GetTensorData<uint8_t>(inputTensor);
+
+                for (size_t j = 0; j < inputTensor->bytes; ++j) {
+                    tData[j] = static_cast<uint8_t>(std::rand() & 0xFF);
+                }
+            }
+        }
+
+        /* Strings for presentation/logging. */
+        std::string str_inf{"Running inference... "};
+
+        /* Display message on the LCD - inference running. */
+        platform.data_psn->present_data_text(
+                                str_inf.c_str(), str_inf.size(),
+                                dataPsnTxtInfStartX, dataPsnTxtInfStartY, 0);
+
+        RunInference(platform, model);
+
+        /* Erase. */
+        str_inf = std::string(str_inf.size(), ' ');
+        platform.data_psn->present_data_text(
+                                str_inf.c_str(), str_inf.size(),
+                                dataPsnTxtInfStartX, dataPsnTxtInfStartY, 0);
+
+#if VERIFY_TEST_OUTPUT
+        for (size_t outputIndex = 0; outputIndex < model.GetNumOutputs(); outputIndex++) {
+            arm::app::DumpTensor(model.GetOutputTensor(outputIndex));
+        }
+#endif /* VERIFY_TEST_OUTPUT */
+
+        return true;
+    }
+
+} /* namespace app */
+} /* namespace arm */
diff --git a/source/use_case/inference_runner/usecase.cmake b/source/use_case/inference_runner/usecase.cmake
new file mode 100644
index 0000000..77b1ae1
--- /dev/null
+++ b/source/use_case/inference_runner/usecase.cmake
@@ -0,0 +1,57 @@
+#----------------------------------------------------------------------------
+#  Copyright (c) 2021 Arm Limited. All rights reserved.
+#  SPDX-License-Identifier: Apache-2.0
+#
+#  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.
+#----------------------------------------------------------------------------
+
+USER_OPTION(${use_case}_ACTIVATION_BUF_SZ "Activation buffer size for the chosen model"
+    0x00200000
+    STRING)
+
+generate_default_input_code(${INC_GEN_DIR})
+
+# If there is no tflite file pointed to
+if (NOT DEFINED ${use_case}_MODEL_TFLITE_PATH)
+
+    set(MODEL_RESOURCES_DIR     ${DOWNLOAD_DEP_DIR}/${use_case})
+    file(MAKE_DIRECTORY         ${MODEL_RESOURCES_DIR})
+    set(MODEL_FILENAME          dnn_s_quantized.tflite)
+    set(DEFAULT_MODEL_PATH      ${MODEL_RESOURCES_DIR}/${MODEL_FILENAME})
+
+    # Download the default model
+    set(ZOO_COMMON_SUBPATH      "models/keyword_spotting/dnn_small/tflite_int8/")
+    set(ZOO_MODEL_SUBPATH       "${ZOO_COMMON_SUBPATH}/${MODEL_FILENAME}")
+
+    download_file_from_modelzoo(${ZOO_MODEL_SUBPATH}    ${DEFAULT_MODEL_PATH})
+
+    if (ETHOS_U55_ENABLED)
+        message(STATUS
+            "Ethos-U55 is enabled, but the model downloaded is not optimized by vela. "
+            "To use Ethos-U55 acceleration, optimise the downloaded model and pass it "
+            "as ${use_case}_MODEL_TFLITE_PATH to the CMake configuration.")
+    endif()
+
+else()
+    set(DEFAULT_MODEL_PATH  "N/A")
+endif()
+
+USER_OPTION(${use_case}_MODEL_TFLITE_PATH "NN models file to be used in the evaluation application. Model files must be in tflite format."
+    ${DEFAULT_MODEL_PATH}
+    FILEPATH)
+
+# Generate model file
+generate_tflite_code(
+    MODEL_PATH ${${use_case}_MODEL_TFLITE_PATH}
+    DESTINATION ${SRC_GEN_DIR}
+)