feat: 切换后端至PaddleOCR-NCNN，切换工程为CMake

1.项目后端整体迁移至PaddleOCR-NCNN算法，已通过基本的兼容性测试
2.工程改为使用CMake组织，后续为了更好地兼容第三方库，不再提供QMake工程
3.重整权利声明文件，重整代码工程，确保最小化侵权风险

Log: 切换后端至PaddleOCR-NCNN，切换工程为CMake
Change-Id: I4d5d2c5d37505a4a24b389b1a4c5d12f17bfa38c

3rdparty/opencv-4.5.4/modules/imgcodecs/src/grfmt_jpeg.hpp

@@ -0,0 +1,113 @@
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#ifndef _GRFMT_JPEG_H_
+#define _GRFMT_JPEG_H_
+
+#include "grfmt_base.hpp"
+#include "bitstrm.hpp"
+
+#ifdef HAVE_JPEG
+
+// IJG-based Jpeg codec
+
+namespace cv
+{
+/**
+* @brief Jpeg markers that can be encountered in a Jpeg file
+*/
+enum AppMarkerTypes
+{
+    SOI = 0xD8, SOF0 = 0xC0, SOF2 = 0xC2, DHT = 0xC4,
+    DQT = 0xDB, DRI = 0xDD, SOS = 0xDA,
+
+    RST0 = 0xD0, RST1 = 0xD1, RST2 = 0xD2, RST3 = 0xD3,
+    RST4 = 0xD4, RST5 = 0xD5, RST6 = 0xD6, RST7 = 0xD7,
+
+    APP0 = 0xE0, APP1 = 0xE1, APP2 = 0xE2, APP3 = 0xE3,
+    APP4 = 0xE4, APP5 = 0xE5, APP6 = 0xE6, APP7 = 0xE7,
+    APP8 = 0xE8, APP9 = 0xE9, APP10 = 0xEA, APP11 = 0xEB,
+    APP12 = 0xEC, APP13 = 0xED, APP14 = 0xEE, APP15 = 0xEF,
+
+    COM = 0xFE, EOI = 0xD9
+};
+
+
+class JpegDecoder CV_FINAL : public BaseImageDecoder
+{
+public:
+
+    JpegDecoder();
+    virtual ~JpegDecoder();
+
+    bool  readData( Mat& img ) CV_OVERRIDE;
+    bool  readHeader() CV_OVERRIDE;
+    void  close();
+
+    ImageDecoder newDecoder() const CV_OVERRIDE;
+
+protected:
+
+    FILE* m_f;
+    void* m_state;
+
+private:
+    JpegDecoder(const JpegDecoder &); // copy disabled
+    JpegDecoder& operator=(const JpegDecoder &); // assign disabled
+};
+
+
+class JpegEncoder CV_FINAL : public BaseImageEncoder
+{
+public:
+    JpegEncoder();
+    virtual ~JpegEncoder();
+
+    bool  write( const Mat& img, const std::vector<int>& params ) CV_OVERRIDE;
+    ImageEncoder newEncoder() const CV_OVERRIDE;
+};
+
+}
+
+#endif
+
+#endif/*_GRFMT_JPEG_H_*/