Initial commit of libimage_io

Image_io is a library for manipulating image files, especially XMP
metadata within them.

Test: m libimage_io
Bug: 109735087
Bug: 119211681
Change-Id: I657f307be0459fe40154806c7cd388b97bcb0ea5

1 files changed, 35 insertions, 0 deletions

diff --git a/includes/image_io/jpeg/jpeg_segment_lister.h b/includes/image_io/jpeg/jpeg_segment_lister.h
new file mode 100644
index 0000000..ca2a19d
--- /dev/null
+++ b/includes/image_io/jpeg/jpeg_segment_lister.h
@@ -0,0 +1,35 @@
+#ifndef IMAGE_IO_JPEG_JPEG_SEGMENT_LISTER_H_  // NOLINT
+#define IMAGE_IO_JPEG_JPEG_SEGMENT_LISTER_H_  // NOLINT
+
+#include <string>
+#include <vector>
+
+#include "image_io/jpeg/jpeg_segment_processor.h"
+
+namespace photos_editing_formats {
+namespace image_io {
+
+/// JpegSegmentLister is an implementation of JpegSegmentProcesor that creates
+/// a listing (in the form of a vector of strings) describing the segments.
+class JpegSegmentLister : public JpegSegmentProcessor {
+ public:
+  JpegSegmentLister();
+  void Start(JpegScanner* scanner) override;
+  void Process(JpegScanner* scanner, const JpegSegment& segment) override;
+  void Finish(JpegScanner* scanner) override;
+
+  /// @return The lines representing the listing of the segments.
+  const std::vector<std::string>& GetLines() const { return lines_; }
+
+ private:
+  /// The number of occurences of the various segment types.
+  std::vector<int> marker_type_counts_;
+
+  /// The lines representing the listing output.
+  std::vector<std::string> lines_;
+};
+
+}  // namespace image_io
+}  // namespace photos_editing_formats
+
+#endif // IMAGE_IO_JPEG_JPEG_SEGMENT_LISTER_H_  // NOLINT