| // Copyright 2013 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_SERVICES_MEDIA_GALLERY_UTIL_MEDIA_METADATA_PARSER_H_ |
| #define CHROME_SERVICES_MEDIA_GALLERY_UTIL_MEDIA_METADATA_PARSER_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "chrome/common/media_galleries/metadata_types.h" |
| #include "chrome/services/media_gallery_util/public/mojom/media_parser.mojom.h" |
| |
| namespace base { |
| class Thread; |
| } |
| |
| namespace media { |
| class DataSource; |
| } |
| |
| // This class takes a MIME type and data source and parses its metadata. It |
| // handles audio, video, and images. It delegates its operations to FFMPEG. |
| // This class lives and operates on the utility thread of the utility process |
| // so we sandbox potentially dangerous operations on user-provided data. |
| class MediaMetadataParser { |
| public: |
| typedef base::Callback<void( |
| chrome::mojom::MediaMetadataPtr metadata, |
| const std::vector<metadata::AttachedImage>& attached_images)> |
| MetadataCallback; |
| |
| MediaMetadataParser(std::unique_ptr<media::DataSource> source, |
| const std::string& mime_type, |
| bool get_attached_images); |
| |
| ~MediaMetadataParser(); |
| |
| // |callback| is called on same message loop. |
| void Start(const MetadataCallback& callback); |
| |
| private: |
| // Only accessed on |media_thread_| from this class. |
| std::unique_ptr<media::DataSource> source_; |
| |
| const std::string mime_type_; |
| |
| bool get_attached_images_; |
| |
| // Thread that blocking media parsing operations run on while the main thread |
| // handles messages from the browser process. |
| // TODO(tommycli): Replace with a reference to a WorkerPool if we ever use |
| // this class in batch mode. |
| std::unique_ptr<base::Thread> media_thread_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MediaMetadataParser); |
| }; |
| |
| #endif // CHROME_SERVICES_MEDIA_GALLERY_UTIL_MEDIA_METADATA_PARSER_H_ |