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// Copyright (c) 2012 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 NW_MEDIA_MEDIA_INTERNALS_H_
#define NW_MEDIA_MEDIA_INTERNALS_H_
#include <string>
#include "base/memory/ref_counted.h"
#include "base/memory/singleton.h"
#include "base/observer_list.h"
#include "base/values.h"
#include "content/public/browser/media_observer.h"
#include "content/public/common/media_stream_request.h"
class MediaCaptureDevicesDispatcher;
class MediaInternalsObserver;
class MediaStreamCaptureIndicator;
namespace media {
struct MediaLogEvent;
// Helper to get the default devices which can be used by the media request,
// if the return list is empty, it means there is no available device on the OS.
// Called on the UI thread.
void GetDefaultDevicesForProfile(
bool audio,
bool video,
content::MediaStreamDevices* devices);
}
// This class stores information about currently active media.
// It's constructed on the UI thread but all of its methods are called on the IO
// thread.
class MediaInternals : public content::MediaObserver {
public:
virtual ~MediaInternals();
static MediaInternals* GetInstance();
// Overridden from content::MediaObserver:
virtual void OnCaptureDevicesOpened(
int render_process_id,
int render_view_id,
const content::MediaStreamDevices& devices) OVERRIDE;
virtual void OnCaptureDevicesClosed(
int render_process_id,
int render_view_id,
const content::MediaStreamDevices& devices) OVERRIDE;
virtual void OnAudioCaptureDevicesChanged(
const content::MediaStreamDevices& devices) OVERRIDE;
virtual void OnVideoCaptureDevicesChanged(
const content::MediaStreamDevices& devices) OVERRIDE;
virtual void OnMediaRequestStateChanged(
int render_process_id,
int render_view_id,
const content::MediaStreamDevice& device,
content::MediaRequestState state) OVERRIDE;
virtual void OnAudioStreamPlayingChanged(
int render_process_id,
int render_view_id,
int stream_id,
bool playing) OVERRIDE;
// Methods for observers.
// Observers should add themselves on construction and remove themselves
// on destruction.
void AddObserver(MediaInternalsObserver* observer);
void RemoveObserver(MediaInternalsObserver* observer);
void SendEverything();
scoped_refptr<MediaStreamCaptureIndicator> GetMediaStreamCaptureIndicator();
scoped_refptr<MediaCaptureDevicesDispatcher>
GetMediaCaptureDevicesDispatcher();
private:
friend class MediaInternalsTest;
friend struct DefaultSingletonTraits<MediaInternals>;
MediaInternals();
// Sets |property| of an audio stream to |value| and notifies observers.
// (host, stream_id) is a unique id for the audio stream.
// |host| will never be dereferenced.
void UpdateAudioStream(void* host, int stream_id,
const std::string& property, Value* value);
// Removes |item| from |data_|.
void DeleteItem(const std::string& item);
// Sets data_.id.property = value and notifies attached UIs using update_fn.
// id may be any depth, e.g. "video.decoders.1.2.3"
void UpdateItem(const std::string& update_fn, const std::string& id,
const std::string& property, Value* value);
// Calls javascript |function|(|value|) on each attached UI.
void SendUpdate(const std::string& function, Value* value);
DictionaryValue data_;
ObserverList<MediaInternalsObserver> observers_;
scoped_refptr<MediaCaptureDevicesDispatcher> media_devices_dispatcher_;
DISALLOW_COPY_AND_ASSIGN(MediaInternals);
};
#endif // CHROME_BROWSER_MEDIA_MEDIA_INTERNALS_H_
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