/usr/include/exiv2/matroskavideo.hpp is in libexiv2-dev 0.24-4.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | // ***************************************************************** -*- C++ -*-
/*
* Copyright (C) 2004-2013 Andreas Huggel <ahuggel@gmx.net>
*
* This program is part of the Exiv2 distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
*/
/*!
@file matroskavideo.hpp
@brief An Image subclass to support Matroska video files
@version $Rev$
@author Abhinav Badola for GSoC 2012
<a href="mailto:mail.abu.to@gmail.com">mail.abu.to@gmail.com</a>
@date 18-Jun-12, AB: created
*/
#ifndef MATROSKAVIDEO_HPP_
#define MATROSKAVIDEO_HPP_
// *****************************************************************************
// included header files
#include "exif.hpp"
#include "image.hpp"
#include "tags_int.hpp"
// *****************************************************************************
// namespace extensions
namespace Exiv2 {
// *****************************************************************************
// class definitions
// Add MKV to the supported image formats
namespace ImageType {
const int mkv = 21; //!< Treating mkv as an image type>
}
// Todo: Should be hidden
/*!
@brief Helper structure for the Matroska tags lookup table.
*/
struct MatroskaTags {
uint64_t val_; //!< Tag value
const char* label_; //!< Translation of the tag value
//! Comparison operator for use with the find template
bool operator==(uint64_t key) const { return val_ == key; }
}; // struct TagDetails
/*!
@brief Class to access Matroska video files.
*/
class EXIV2API MatroskaVideo : public Image {
public:
//! @name Creators
//@{
/*!
@brief Constructor for a Matroska video. Since the constructor
can not return a result, callers should check the good() method
after object construction to determine success or failure.
@param io An auto-pointer that owns a BasicIo instance used for
reading and writing image metadata. \b Important: The constructor
takes ownership of the passed in BasicIo instance through the
auto-pointer. Callers should not continue to use the BasicIo
instance after it is passed to this method. Use the Image::io()
method to get a temporary reference.
*/
MatroskaVideo(BasicIo::AutoPtr io);
//@}
//! @name Manipulators
//@{
void readMetadata();
void writeMetadata();
//@}
//! @name Accessors
//@{
std::string mimeType() const;
//@}
protected:
/*!
@brief Function used to calulate the size of a block.
This information is only stored in one byte.
The size of the block is calculated by counting
the number of leading zeros in the binary code of the byte.
Size = (No. of leading zeros + 1) bytes
@param b The byte, which stores the information to calculate the size
@return Return the size of the block.
*/
uint32_t findBlockSize(byte b);
/*!
@brief Check for a valid tag and decode the block at the current IO position.
Calls contentManagement() or skips to next tag, if required.
*/
void decodeBlock();
/*!
@brief Interpret tag information, and save it in the respective XMP container.
@param mt Pointer to current tag,
@param buf Pointer to the memory area with the tag information.
@param size Size of \em buf.
*/
void contentManagement(const MatroskaTags* mt, const byte* buf, long size);
/*!
@brief Calculates Aspect Ratio of a video, and stores it in the
respective XMP container.
*/
void aspectRatio();
private:
//! @name NOT Implemented
//@{
//! Copy constructor
MatroskaVideo(const MatroskaVideo& rhs);
//! Assignment operator
MatroskaVideo& operator=(const MatroskaVideo& rhs);
//@}
private:
//! Variable to check the end of metadata traversing.
bool continueTraversing_;
//! Variable to store height and width of a video frame.
uint64_t height_, width_;
}; // class MatroskaVideo
// *****************************************************************************
// template, inline and free functions
// These could be static private functions on Image subclasses but then
// ImageFactory needs to be made a friend.
/*!
@brief Create a new MatroskaVideo instance and return an auto-pointer to it.
Caller owns the returned object and the auto-pointer ensures that
it will be deleted.
*/
EXIV2API Image::AutoPtr newMkvInstance(BasicIo::AutoPtr io, bool create);
//! Check if the file iIo is a Matroska Video.
EXIV2API bool isMkvType(BasicIo& iIo, bool advance);
} // namespace Exiv2
#endif // #ifndef MATROSKAVIDEO_HPP_
|