Reland: Media Galleries Partial Deprecation: Remove image metadata & libexif.

chrome/utility/media_galleries/image_metadata_extractor.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CHROME_UTILITY_MEDIA_GALLERIES_IMAGE_METADATA_EXTRACTOR_H_
-#define CHROME_UTILITY_MEDIA_GALLERIES_IMAGE_METADATA_EXTRACTOR_H_
-
-#include <string>
-
-#include "base/callback_forward.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-
-namespace media {
-class DataSource;
-}
-
-namespace net {
-class DrainableIOBuffer;
-}
-
-namespace metadata {
-
-// Extracts a basic set of image metadata tags. Users must initialize the
-// library before use. Each class instance is 'one-time-use', and cannot be used
-// to extract metadata from multiple images.
-class ImageMetadataExtractor {
- public:
-  typedef base::Callback<void(bool)> DoneCallback;
-
-  // One of these two is required before use of this class.
-  static bool InitializeLibrary();
-  static bool InitializeLibraryForTesting();
-
-  ImageMetadataExtractor();
-  ~ImageMetadataExtractor();
-
-  // |callback| called with whether or not the extraction succeeded. Should
-  // only be called once.
-  void Extract(media::DataSource* source, const DoneCallback& callback);
-
-  // All below methods require Extract to have already succeeded.
-  // Returns -1 if file does not define a width or height.
-  int width() const;
-  int height() const;
-
-  // In degrees.
-  int rotation() const;
-
-  // In pixels per inch.
-  double x_resolution() const;
-  double y_resolution() const;
-
-  // In the same string form as the original file.
-  const std::string& date() const;
-
-  const std::string& camera_make() const;
-  const std::string& camera_model() const;
-  double exposure_time_sec() const;
-  bool flash_fired() const;
-  double f_number() const;
-  double focal_length_mm() const;
-  int iso_equivalent() const;
-
- private:
-  // Second half of the Extract method.
-  void FinishExtraction(const DoneCallback& callback,
-                        const scoped_refptr<net::DrainableIOBuffer>& buffer);
-
-  bool extracted_;
-
-  int width_;
-  int height_;
-
-  int rotation_;
-
-  double x_resolution_;
-  double y_resolution_;
-
-  std::string date_;
-
-  std::string camera_make_;
-  std::string camera_model_;
-  double exposure_time_sec_;
-  bool flash_fired_;
-  double f_number_;
-  double focal_length_mm_;
-  int iso_equivalent_;
-
-  DISALLOW_COPY_AND_ASSIGN(ImageMetadataExtractor);
-};
-
-}  // namespace metadata
-
-#endif  // CHROME_UTILITY_MEDIA_GALLERIES_IMAGE_METADATA_EXTRACTOR_H_