f4334277
 Hu Chunming
提交3rdparty
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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
//
// Copyright (C) 2020, Stefan Brüns <stefan.bruens@rwth-aachen.de>
#ifndef _GRFMT_OPENJPEG_H_
#define _GRFMT_OPENJPEG_H_
#ifdef HAVE_OPENJPEG
#include "grfmt_base.hpp"
#include <openjpeg.h>
namespace cv {
namespace detail {
struct OpjStreamDeleter
{
void operator()(opj_stream_t* stream) const
{
opj_stream_destroy(stream);
}
};
struct OpjCodecDeleter
{
void operator()(opj_codec_t* codec) const
{
opj_destroy_codec(codec);
}
};
struct OpjImageDeleter
{
void operator()(opj_image_t* image) const
{
opj_image_destroy(image);
}
};
struct OpjMemoryBuffer {
OPJ_BYTE* pos{nullptr};
OPJ_BYTE* begin{nullptr};
OPJ_SIZE_T length{0};
OpjMemoryBuffer() = default;
explicit OpjMemoryBuffer(cv::Mat& mat)
: pos{ mat.ptr() }, begin{ mat.ptr() }, length{ mat.rows * mat.cols * mat.elemSize() }
{
}
OPJ_SIZE_T availableBytes() const CV_NOEXCEPT {
return begin + length - pos;
}
};
using StreamPtr = std::unique_ptr<opj_stream_t, detail::OpjStreamDeleter>;
using CodecPtr = std::unique_ptr<opj_codec_t, detail::OpjCodecDeleter>;
using ImagePtr = std::unique_ptr<opj_image_t, detail::OpjImageDeleter>;
class Jpeg2KOpjDecoderBase : public BaseImageDecoder
{
public:
Jpeg2KOpjDecoderBase(OPJ_CODEC_FORMAT format);
bool readData( Mat& img ) CV_OVERRIDE;
bool readHeader() CV_OVERRIDE;
private:
detail::StreamPtr stream_{nullptr};
detail::CodecPtr codec_{nullptr};
detail::ImagePtr image_{nullptr};
detail::OpjMemoryBuffer opjBuf_;
OPJ_UINT32 m_maxPrec = 0;
OPJ_CODEC_FORMAT format_;
};
} // namespace detail
class Jpeg2KJP2OpjDecoder CV_FINAL : public detail::Jpeg2KOpjDecoderBase {
public:
Jpeg2KJP2OpjDecoder();
ImageDecoder newDecoder() const CV_OVERRIDE;
};
class Jpeg2KJ2KOpjDecoder CV_FINAL : public detail::Jpeg2KOpjDecoderBase {
public:
Jpeg2KJ2KOpjDecoder();
ImageDecoder newDecoder() const CV_OVERRIDE;
};
class Jpeg2KOpjEncoder CV_FINAL : public BaseImageEncoder
{
public:
Jpeg2KOpjEncoder();
~Jpeg2KOpjEncoder() CV_OVERRIDE = default;
bool isFormatSupported( int depth ) const CV_OVERRIDE;
bool write( const Mat& img, const std::vector<int>& params ) CV_OVERRIDE;
ImageEncoder newEncoder() const CV_OVERRIDE;
};
} //namespace cv
#endif
#endif/*_GRFMT_OPENJPEG_H_*/
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