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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 CHROME_BROWSER_MEDIA_MEDIA_STREAM_DEVICES_CONTROLLER_H_
#define CHROME_BROWSER_MEDIA_MEDIA_STREAM_DEVICES_CONTROLLER_H_
#include <string>
#include "content/public/browser/web_contents_delegate.h"
class Profile;
class MediaStreamDevicesController {
public:
// TODO(xians): Use const content::MediaStreamRequest& instead of *.
MediaStreamDevicesController(Profile* profile,
const content::MediaStreamRequest* request,
const content::MediaResponseCallback& callback);
virtual ~MediaStreamDevicesController();
// Public method to be called before creating the MediaStreamInfoBarDelegate.
// This function will check the content settings exceptions and take the
// corresponding action on exception which matches the request.
bool DismissInfoBarAndTakeActionOnSettings();
// Public methods to be called by MediaStreamInfoBarDelegate;
bool has_audio() const { return has_audio_; }
bool has_video() const { return has_video_; }
const std::string& GetSecurityOriginSpec() const;
content::MediaStreamDevices GetAudioDevices() const;
content::MediaStreamDevices GetVideoDevices() const;
bool IsSafeToAlwaysAllowAudio() const;
bool IsSafeToAlwaysAllowVideo() const;
void Accept(const std::string& audio_id,
const std::string& video_id,
bool always_allow);
void Deny();
private:
// Used by the various helper methods below to filter an operation on devices
// of a particular type.
typedef bool (*FilterByDeviceTypeFunc)(content::MediaStreamDeviceType);
// Returns true if a secure scheme is being used by the origin AND only
// devices of the given physical |device_type| are present in the subset of
// devices selected by the |is_included| function.
bool IsSafeToAlwaysAllow(FilterByDeviceTypeFunc is_included,
content::MediaStreamDeviceType device_type) const;
// Returns true if the media section in content settings is set to
// |CONTENT_SETTING_BLOCK|, otherwise returns false.
bool IsMediaDeviceBlocked();
// NOTE on AlwaysAllowOrigin functionality: The rules only apply to physical
// capture devices, and not tab mirroring (or other "virtual device" types).
// Virtual devices are always denied an AlwaysAllowOrigin status because they
// refer to internal objects whose "IDs" might be re-used for different
// objects across browser sessions.
// Returns true if request's origin is from internal objects like
// chrome://URLs, otherwise returns false.
bool ShouldAlwaysAllowOrigin();
// Grants "always allow" exception for the origin to use the selected devices.
void AlwaysAllowOriginAndDevices(const std::string& audio_device,
const std::string& video_device);
// Gets the respective "always allowed" devices for the origin in |request_|.
// |audio_id| and |video_id| will be empty if there is no "always allowed"
// device for the origin, or any of the devices is not listed on the devices
// list in |request_|.
void GetAlwaysAllowedDevices(std::string* audio_id,
std::string* video_id);
std::string GetDeviceIdByName(content::MediaStreamDeviceType type,
const std::string& name);
std::string GetFirstDeviceId(content::MediaStreamDeviceType type);
// Copies all devices passing the |is_included| predicate to the given output
// container.
void FindSubsetOfDevices(FilterByDeviceTypeFunc is_included,
content::MediaStreamDevices* out) const;
// Finds the first device with the given |device_id| within the subset of
// devices passing the |is_included| predicate, or return NULL.
const content::MediaStreamDevice* FindFirstDeviceWithIdInSubset(
FilterByDeviceTypeFunc is_included,
const std::string& device_id) const;
bool has_audio_;
bool has_video_;
// The owner of this class needs to make sure it does not outlive the profile.
Profile* profile_;
// The original request for access to devices.
const content::MediaStreamRequest request_;
// The callback that needs to be Run to notify WebRTC of whether access to
// audio/video devices was granted or not.
content::MediaResponseCallback callback_;
DISALLOW_COPY_AND_ASSIGN(MediaStreamDevicesController);
};
#endif // CHROME_BROWSER_MEDIA_MEDIA_STREAM_DEVICES_CONTROLLER_H_
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