blob: 1e7720b6a763ae8bbff810cdf67a2b8292abe2b7 [file] [log] [blame]
// 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.
#include <memory>
#include <string>
#include <vector>
#include "base/callback.h"
#include "base/macros.h"
#include "chrome/common/extensions/api/media_galleries.h"
#include "chrome/common/media_galleries/metadata_types.h"
namespace base {
class Thread;
namespace media {
class DataSource;
namespace metadata {
// 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,
// as we wish to sandbox potentially dangerous operations on user-provided data.
class MediaMetadataParser {
typedef extensions::api::media_galleries::MediaMetadata MediaMetadata;
typedef base::Callback<
void(const MediaMetadata& metadata,
const std::vector<AttachedImage>& attached_images)>
// Does not take ownership of |source|. Caller is responsible for ensuring
// that |source| outlives this object.
MediaMetadataParser(media::DataSource* source, const std::string& mime_type,
bool get_attached_images);
// |callback| is called on same message loop.
void Start(const MetadataCallback& callback);
// Only accessed on |media_thread_| from this class.
media::DataSource* const 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_;
} // namespace metadata