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, 61 insertions, 0 deletions

diff --git a/samples/common/include/CVUtils/CvVideoFileWriter.hpp b/samples/common/include/CVUtils/CvVideoFileWriter.hpp
new file mode 100644
index 0000000000..30348f09cc
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+++ b/samples/common/include/CVUtils/CvVideoFileWriter.hpp
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+//
+// Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include "IFrameOutput.hpp"
+#include <opencv2/opencv.hpp>
+
+namespace common
+{
+
+class CvVideoFileWriter : public IFrameOutput<cv::Mat> {
+public:
+    /**
+     * @brief Default constructor.
+     *
+     * Underlying open cv video writer object will be instantiated.
+     */
+    CvVideoFileWriter() = default;
+
+    ~CvVideoFileWriter() override = default;
+
+    /**
+     * @brief Initialises video file writer.
+     *
+     * Opens opencv writer with given params. FFMPEG backend is used.
+     *
+     * @param outputVideo path to the video file.
+     * @param encoding cv::CAP_PROP_FOURCC code.
+     * @param fps target frame rate.
+     * @param width target frame width.
+     * @param height target frame height.
+     *
+     */
+    void Init(const std::string& outputVideo, int encoding, double fps, int width, int height);
+
+    /**
+     * Writes frame to the file using opencv writer.
+     *
+     * @param frame data to write.
+     */
+    void WriteFrame(std::shared_ptr<cv::Mat>& frame) override;
+
+    /**
+     * Releases opencv writer.
+     */
+    void Close() override;
+
+    /**
+     * Checks if opencv writer was successfully opened.
+     * @return true is underlying writer is ready to be used, false otherwise.
+     */
+    bool IsReady() const override;
+
+private:
+    cv::VideoWriter m_cvWriter{};
+    bool m_ready = false;
+};
+}// namespace common
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