MLECO-1252 ASR sample application using the public ArmNN C++ API.

Change-Id: I98cd505b8772a8c8fa88308121bc94135bb45068
Signed-off-by: Éanna Ó Catháin <eanna.ocathain@arm.com>

1 files changed, 62 insertions, 0 deletions

diff --git a/samples/SpeechRecognition/include/AudioCapture.hpp b/samples/SpeechRecognition/include/AudioCapture.hpp
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+++ b/samples/SpeechRecognition/include/AudioCapture.hpp
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+//
+// Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <string>
+#include <iostream>
+
+#include <math.h>
+
+#include <vector>
+
+#include <exception>
+
+#include "SlidingWindow.hpp"
+
+namespace asr
+{
+
+/**
+* @brief Class used to capture the audio data loaded from file, and to provide a method of
+ * extracting correctly positioned and appropriately sized audio windows
+*
+*/
+    class AudioCapture
+    {
+    public:
+
+        SlidingWindow<const float> m_window;
+        int lastReadIdx= 0;
+
+        /**
+        * @brief Default constructor
+        */
+        AudioCapture()
+        {};
+
+        /**
+        * @brief Function to load the audio data captured from the
+         * input file to memory.
+        */
+        std::vector<float> LoadAudioFile(std::string filePath);
+
+        /**
+        * @brief Function to initialize the sliding window. This will set its position in memory, its
+         * window size and its stride.
+        */
+        void InitSlidingWindow(float* data, size_t dataSize, int minSamples, size_t stride);
+
+        /**
+        * Checks whether there is another block of audio in memory to read
+        */
+        bool HasNext();
+
+        /**
+        * Retrieves the next block of audio if its available
+        */
+        std::vector<float> Next();
+    };
+} // namespace asr
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