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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.
// MediaStreamDeviceSettings is used to decide which of the available capture
// device to use as well as getting user permission to use the capture device.
// There will be one instance of MediaStreamDeviceSettings handling all
// requests.
// Expected call flow:
// 1. RequestCaptureDeviceUsage() is called to create a new request for capture
// device usage.
// 2. AvailableDevices() is called with a list of currently available devices.
// 3. Pick device and get user confirmation.
// 4. Confirm by calling SettingsRequester::DevicesAccepted().
// Repeat step 1 - 4 for new device requests.
#ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DEVICE_SETTINGS_H_
#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DEVICE_SETTINGS_H_
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/memory/weak_ptr.h"
#include "content/browser/renderer_host/media/media_stream_provider.h"
namespace media_stream {
class MediaStreamDeviceSettingsRequest;
class SettingsRequester;
// MediaStreamDeviceSettings is responsible for getting user permission to use
// a media capture device as well as selecting what device to use.
class CONTENT_EXPORT MediaStreamDeviceSettings
: public base::SupportsWeakPtr<MediaStreamDeviceSettings> {
public:
explicit MediaStreamDeviceSettings(SettingsRequester* requester);
virtual ~MediaStreamDeviceSettings();
// Called when a new request of capture device usage is made.
void RequestCaptureDeviceUsage(const std::string& label,
int render_process_id,
int render_view_id,
const StreamOptions& stream_components,
const GURL& security_origin);
// Called to remove a pending request of capture device usage when the user
// has no action for the media stream InfoBar.
void RemovePendingCaptureRequest(const std::string& label);
// Called to pass in an array of available devices for a request represented
// by |label|. There could be multiple calls for a request.
void AvailableDevices(const std::string& label, MediaStreamType stream_type,
const StreamDeviceInfoArray& devices);
// Called by the InfoBar when the user grants/denies access to some devices
// to the webpage. This is placed here, so the request can be cleared from the
// list of pending requests, instead of letting the InfoBar itself respond to
// the requester. An empty list of devices means that access has been denied.
// This method must be called on the IO thread.
void PostResponse(const std::string& label,
const content::MediaStreamDevices& devices);
// Used for testing only. This function is called to use faked UI, which is
// needed for server based tests. The first non-opened device(s) will be
// picked.
void UseFakeUI();
private:
typedef std::map<std::string, MediaStreamDeviceSettingsRequest*>
SettingsRequests;
// Returns true if the UI is already processing a request for this render
// view.
bool IsUiBusy(int render_view_id, int render_process_id);
// Finds a request ready to be sent to UI for user approval.
std::string FindReadyRequestForView(int render_view_id,
int render_process_id);
// Posts a request to be approved/denied by UI.
void PostRequestToUi(const std::string& label);
SettingsRequester* requester_;
SettingsRequests requests_;
// See comment above for method UseFakeUI. Used for automated testing.
bool use_fake_ui_;
DISALLOW_COPY_AND_ASSIGN(MediaStreamDeviceSettings);
};
} // namespace media_stream
#endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DEVICE_SETTINGS_H_
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