- private:
- int type;
- Exiv2::TiffComponent::AutoPtr rootDir;
- Exiv2::BasicIo &io_;
- const Exiv2::byte *map_data;
- size_t map_len;
- unsigned long offset;
-};
-
-struct UnmapData
-{
- guchar *ptr;
- guchar *map_data;
- size_t map_len;
-};
-
-static GList *exif_unmap_list = 0;
-
-guchar *exif_get_preview(ExifData *exif, guint *data_len, gint requested_width, gint requested_height)
-{
- unsigned long offset;
-
- if (!exif) return NULL;
- if (!exif->image()) return NULL;
-
- std::string const path = exif->image()->io().path();
-
- /* given image pathname, first do simple (and fast) file extension test */
- if (!filter_file_class(path.c_str(), FORMAT_CLASS_RAWIMAGE)) return NULL;
-
- try {
- struct stat st;
- guchar *map_data;
- size_t map_len;
- UnmapData *ud;
- int fd;
-
- RawFile rf(exif->image()->io());
- offset = rf.preview_offset();
- DEBUG_1("%s: offset %lu", path.c_str(), offset);
-
- fd = open(path.c_str(), O_RDONLY);
- if (fd == -1)
- {
- return NULL;
- }
-
- if (fstat(fd, &st) == -1)
- {
- close(fd);
- return NULL;
- }
- map_len = st.st_size;
- map_data = (guchar *) mmap(0, map_len, PROT_READ, MAP_PRIVATE, fd, 0);
- close(fd);
- if (map_data == MAP_FAILED)
- {
- return NULL;
- }
- *data_len = map_len - offset;
- ud = g_new(UnmapData, 1);
- ud->ptr = map_data + offset;
- ud->map_data = map_data;
- ud->map_len = map_len;
-
- exif_unmap_list = g_list_prepend(exif_unmap_list, ud);
- return ud->ptr;
-
- }
- catch (Exiv2::AnyError& e) {
- debug_exception(e);
- }
- return NULL;
-
-}
-
-void exif_free_preview(const guchar *buf)
-{
- GList *work = exif_unmap_list;
-
- while (work)
- {
- UnmapData *ud = (UnmapData *)work->data;
- if (ud->ptr == buf)
- {
- munmap(ud->map_data, ud->map_len);
- exif_unmap_list = g_list_remove_link(exif_unmap_list, work);
- g_free(ud);
- return;
- }
- work = work->next;
- }
- g_assert_not_reached();
-}
-
-using namespace Exiv2;
-
-RawFile::RawFile(BasicIo &io) : io_(io), map_data(NULL), map_len(0), offset(0)
-{
-/*
- struct stat st;
- if (fstat(fd, &st) == -1)
- {
- throw Error(14);
- }
- map_len = st.st_size;
- map_data = (Exiv2::byte *) mmap(0, map_len, PROT_READ, MAP_PRIVATE, fd, 0);
- if (map_data == MAP_FAILED)
- {
- throw Error(14);
- }
-*/
- if (io.open() != 0) {
- throw Error(9, io.path(), strError());
- }
-
- map_data = io.mmap();
- map_len = io.size();
-
-
- type = Exiv2::ImageFactory::getType(map_data, map_len);
-
-#if EXIV2_TEST_VERSION(0,16,0)
- std::unique_ptr<TiffHeaderBase> tiffHeader;
-#else
- std::unique_ptr<TiffHeade2> tiffHeader;
-#endif
- std::unique_ptr<Cr2Header> cr2Header;
-
- switch (type) {
- case Exiv2::ImageType::tiff:
- tiffHeader = std::make_unique<TiffHeade2>();
- break;
- case Exiv2::ImageType::cr2:
- cr2Header = std::make_unique<Cr2Header>();
- break;
-#if EXIV2_TEST_VERSION(0,16,0)
- case Exiv2::ImageType::orf:
- tiffHeader = std::make_unique<OrfHeader>();
- break;
-#endif
-#if EXIV2_TEST_VERSION(0,13,0)
- case Exiv2::ImageType::raf:
- if (map_len < 84 + 4) throw Error(14);
- offset = getULong(map_data + 84, bigEndian);
- return;
-#endif
- case Exiv2::ImageType::crw:
- {
- // Parse the image, starting with a CIFF header component
- auto parseTree = std::make_unique<Exiv2::CiffHeader>();
- parseTree->read(map_data, map_len);
- CiffComponent *entry = parseTree->findComponent(0x2007, 0);
- if (entry) offset = entry->pData() - map_data;
- return;
- }
-
- default:
- throw Error(3, "RAW");
- }
-
- // process tiff-like formats
-
- TiffCompFactoryFct createFct = TiffCreator::create;
-
- rootDir = createFct(Tag::root, Group::none);
- if (0 == rootDir.get()) {
- throw Error(1, "No root element defined in TIFF structure");
- }
-
- if (tiffHeader)
- {
- if (!tiffHeader->read(map_data, map_len)) throw Error(3, "TIFF");
-#if EXIV2_TEST_VERSION(0,16,0)
- rootDir->setStart(map_data + tiffHeader->offset());
-#else
- rootDir->setStart(map_data + tiffHeader->ifdOffset());
-#endif
- }
-
- if (cr2Header)
- {
- rootDir->setStart(map_data + cr2Header->offset());
- }
-
- TiffRwState::AutoPtr state(new TiffRwState(tiffHeader ? tiffHeader->byteOrder() : littleEndian, 0, createFct));
-
- TiffReader reader(map_data,
- map_len,
- rootDir.get(),
- state);
-
- rootDir->accept(reader);
-}
-
-RawFile::~RawFile(void)
-{
- io_.munmap();
- io_.close();
-}
-
-const Value * RawFile::find(uint16_t tag, uint16_t group)
-{
- TiffFinder finder(tag, group);
- rootDir->accept(finder);
- TiffEntryBase* te = dynamic_cast<TiffEntryBase*>(finder.result());
- if (te)
- {
- DEBUG_1("(tag: %04x %04x) ", tag, group);
- return te->pValue();
- }
- else
- return NULL;
-}
-
-unsigned long RawFile::preview_offset(void)
-{
- const Value *val;
- if (offset) return offset;
-
- if (type == Exiv2::ImageType::cr2)
- {
- val = find(0x111, Group::ifd0);
-#if EXIV2_TEST_VERSION(0,28,0)
- if (val) return val->toInt64();
-#else
- if (val) return val->tolong();
-#endif
- return 0;
- }
-
- val = find(0x201, Group::sub0_0);
-#if EXIV2_TEST_VERSION(0,28,0)
- if (val) return val->toInt64();
-#else
- if (val) return val->tolong();
-#endif
-
- val = find(0x201, Group::ifd0);
-#if EXIV2_TEST_VERSION(0,28,0)
- if (val) return val->toInt64();
-#else
- if (val) return val->tolong();
-#endif
-
- val = find(0x201, Group::ignr); // for PEF files, originally it was probably ifd2
-#if EXIV2_TEST_VERSION(0,28,0)
- if (val) return val->toInt64();
-#else
- if (val) return val->tolong();
-#endif
-
- val = find(0x111, Group::sub0_1); // dng
-#if EXIV2_TEST_VERSION(0,28,0)
- if (val) return val->toInt64();
-#else
- if (val) return val->tolong();
-#endif
-
- return 0;
-}
-
-
-#endif
-
-
-#endif
-/* HAVE_EXIV2 */