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134 lines
5.1 KiB
C++
134 lines
5.1 KiB
C++
// ***************************************************************** -*- C++ -*-
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/*
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* Copyright (C) 2004-2021 Exiv2 authors
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* This program is part of the Exiv2 distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef WEBPIMAGE_HPP
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#define WEBPIMAGE_HPP
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// *****************************************************************************
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#include "exiv2lib_export.h"
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// included header files
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#include "image.hpp"
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// *****************************************************************************
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// namespace extensions
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namespace Exiv2 {
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// *****************************************************************************
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// class definitions
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// Add WEBP to the supported image formats
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namespace ImageType {
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const int webp = 23; //!< Treating webp as an image type>
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}
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/*!
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@brief Class to access WEBP video files.
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*/
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class EXIV2API WebPImage:public Image
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{
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public:
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//! @name Creators
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//@{
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/*!
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@brief Constructor for a WebP video. Since the constructor
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can not return a result, callers should check the good() method
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after object construction to determine success or failure.
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@param io An auto-pointer that owns a BasicIo instance used for
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reading and writing image metadata. \b Important: The constructor
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takes ownership of the passed in BasicIo instance through the
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auto-pointer. Callers should not continue to use the BasicIo
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instance after it is passed to this method. Use the Image::io()
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method to get a temporary reference.
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*/
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explicit WebPImage(BasicIo::UniquePtr io);
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//@}
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//! @name Manipulators
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//@{
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void readMetadata() override;
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void writeMetadata() override;
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void printStructure(std::ostream& out, PrintStructureOption option, int depth) override;
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//@}
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/*!
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@brief Not supported. Calling this function will throw an Error(kerInvalidSettingForImage).
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*/
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void setComment(const std::string& comment) override;
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void setIptcData(const IptcData& /*iptcData*/) override;
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//! @name Accessors
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//@{
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std::string mimeType() const override;
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//@}
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//! Copy constructor
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WebPImage(const WebPImage& rhs) = delete;
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//! Assignment operator
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WebPImage& operator=(const WebPImage& rhs) = delete;
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//@}
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private:
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void doWriteMetadata(BasicIo& outIo);
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//! @name NOT Implemented
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//@{
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static long getHeaderOffset(byte* data, long data_size, byte* header, long header_size);
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static bool equalsWebPTag(Exiv2::DataBuf& buf, const char* str);
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void debugPrintHex(byte *data, long size);
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void decodeChunks(long filesize);
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void inject_VP8X(BasicIo& iIo, bool has_xmp, bool has_exif,
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bool has_alpha, bool has_icc, int width,
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int height);
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static const byte WEBP_PAD_ODD;
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static const int WEBP_TAG_SIZE;
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static const int WEBP_VP8X_ICC_BIT;
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static const int WEBP_VP8X_ALPHA_BIT;
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static const int WEBP_VP8X_EXIF_BIT;
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static const int WEBP_VP8X_XMP_BIT;
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static const char* const WEBP_CHUNK_HEADER_VP8X;
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static const char* const WEBP_CHUNK_HEADER_VP8L;
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static const char* const WEBP_CHUNK_HEADER_VP8;
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static const char* const WEBP_CHUNK_HEADER_ANMF;
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static const char* const WEBP_CHUNK_HEADER_ANIM;
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static const char* const WEBP_CHUNK_HEADER_ICCP;
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static const char* const WEBP_CHUNK_HEADER_EXIF;
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static const char* const WEBP_CHUNK_HEADER_XMP;
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}; //Class WebPImage
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// *****************************************************************************
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// template, inline and free functions
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// These could be static private functions on Image subclasses but then
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// ImageFactory needs to be made a friend.
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/*!
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@brief Create a new WebPImage instance and return an auto-pointer to it.
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Caller owns the returned object and the auto-pointer ensures that
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it will be deleted.
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*/
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EXIV2API Image::UniquePtr newWebPInstance(BasicIo::UniquePtr io, bool create);
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//! Check if the file iIo is a WebP Video.
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EXIV2API bool isWebPType(BasicIo& iIo, bool advance);
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} // namespace Exiv2
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#endif // WEBPIMAGE_HPP
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