/*

 * libopenraw - makernotedir.cpp

 *

 * Copyright (C) Hubert Figuiere

 *

 * This library is free software: you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public License

 * as published by the Free Software Foundation, either version 3 of

 * the License, or (at your option) any later version.

 *

 * This library 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library.  If not, see

 * <http://www.gnu.org/licenses/>.

 */

#include <fcntl.h>

#include <string.h>

#include "makernotedir.hpp"

#include "io/stream.hpp"

#include "ifdfilecontainer.hpp"

#include "trace.hpp"

namespace OpenRaw {

namespace Internals {

/*

 * For Makernote detection, see:

 *   http://owl.phy.queensu.ca/~phil/exiftool/makernote_types.html

 *   http://www.exiv2.org/makernote.html

 */

MakerNoteDir::Ref

MakerNoteDir::createMakerNote(off_t offset,

                              IfdFileContainer & container)

{

    LOGDBG1("createMakerNote()\n");

    char data[18];

    auto file = container.file();

    file->seek(offset, SEEK_SET);

    file->read(&data, 18);

    if (memcmp("Nikon\0", data, 6) == 0) {

        if (data[6] == 1) {

            return std::make_shared<MakerNoteDir>(

                offset + 8, container, offset + 8, "Nikon2");

        }

        else if (data[6] == 2) {

            // this one has an endian / TIFF header after the magic

            return std::make_shared<MakerNoteDir>(

                offset + 18, container, offset + 10, "Nikon");

        }

        else {

            return std::make_shared<MakerNoteDir>(

                offset, container, offset, "");

        }

    }

    if (memcmp("OLYMPUS\0", data, 8) == 0) {

        return std::make_shared<MakerNoteDir>(

            offset + 12, container, offset, "Olympus2");

    }

    if (memcmp("OLYMP\0", data, 6) == 0) {

        return std::make_shared<MakerNoteDir>(

            offset + 8, container, offset + 8, "Olympus");

    }

    if (memcmp("MLT0", data + 10, 4) == 0) {

        return std::make_shared<MakerNoteDir>(

            offset, container, offset, "Minolta");

    }

    return std::make_shared<MakerNoteDir>(offset, container, offset, "");

}

MakerNoteDir::MakerNoteDir(off_t _offset,

                           IfdFileContainer & _container,

                           off_t mnote_offset,

                           const std::string & id)

    : MakerNoteDir("", 0, _offset, _container, mnote_offset, id)

{

}

MakerNoteDir::MakerNoteDir(const char* magic, size_t hlen,

                           off_t _offset,

                           IfdFileContainer & _container,

                           off_t mnote_offset,

                           const std::string & id)

    : IfdDir(_offset, _container)

    , m_magic(magic ? magic : "")

    , m_hlen(hlen)

    , m_mnote_offset(mnote_offset)

    , m_id(id)

{

}

MakerNoteDir::~MakerNoteDir()

{

}

}

}

/*

  Local Variables:

  mode:c++

  c-file-style:"stroustrup"

  c-file-offsets:((innamespace . 0))

  indent-tabs-mode:nil

  fill-column:80

  End:

*/