TiffComponent* newNikonMn(uint16_t tag,
IfdId group,
IfdId /*mnGroup*/,
const byte* pData,
uint32_t size,
ByteOrder /*byteOrder*/)
{
// If there is no "Nikon" string it must be Nikon1 format
if (size < 6 || std::string(reinterpret_cast<const char*>(pData), 6)
!= std::string("Nikon\0", 6)) {
// Require at least an IFD with 1 entry
if (size < 18) return 0;
return newIfdMn2(tag, group, nikon1Id);
}
// If the "Nikon" string is not followed by a TIFF header, we assume
// Nikon2 format
TiffHeader tiffHeader;
if ( size < 18
|| !tiffHeader.read(pData + 10, size - 10)
|| tiffHeader.tag() != 0x002a) {
// Require at least the header and an IFD with 1 entry
if (size < Nikon2MnHeader::sizeOfSignature() + 18) return 0;
return newNikon2Mn2(tag, group, nikon2Id);
}
// Else we have a Nikon3 makernote
// Require at least the header and an IFD with 1 entry
if (size < Nikon3MnHeader::sizeOfSignature() + 18) return 0;
return newNikon3Mn2(tag, group, nikon3Id);
}
MakerNote::AutoPtr createNikonMakerNote(bool alloc,
const byte* buf,
long len,
ByteOrder byteOrder,
long offset)
{
// If there is no "Nikon" string it must be Nikon1 format
if (len < 6 || std::string(reinterpret_cast<const char*>(buf), 6)
!= std::string("Nikon\0", 6)) {
return MakerNote::AutoPtr(new Nikon1MakerNote(alloc));
}
// If the "Nikon" string is not followed by a TIFF header, we assume
// Nikon2 format
TiffHeader tiffHeader;
if ( len < 18
|| tiffHeader.read(buf + 10) != 0 || tiffHeader.tag() != 0x002a) {
return MakerNote::AutoPtr(new Nikon2MakerNote(alloc));
}
// Else we have a Nikon3 makernote
return MakerNote::AutoPtr(new Nikon3MakerNote(alloc));
}
TiffComponent* newNikonMn(uint16_t tag,
uint16_t group,
uint16_t /*mnGroup*/,
const byte* pData,
uint32_t size,
ByteOrder /*byteOrder*/)
{
// If there is no "Nikon" string it must be Nikon1 format
if (size < 6 || std::string(reinterpret_cast<const char*>(pData), 6)
!= std::string("Nikon\0", 6)) {
return newIfdMn2(tag, group, Group::nikon1mn);
}
// If the "Nikon" string is not followed by a TIFF header, we assume
// Nikon2 format
TiffHeader tiffHeader;
if ( size < 18
|| !tiffHeader.read(pData + 10, size - 10)
|| tiffHeader.tag() != 0x002a) {
return newNikon2Mn2(tag, group, Group::nikon2mn);
}
// Else we have a Nikon3 makernote
return newNikon3Mn2(tag, group, Group::nikon3mn);
}