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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_UI_PROXY_H_
#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_UI_PROXY_H_
#include <memory>
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/types/expected.h"
#include "build/build_config.h"
#include "content/common/content_export.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/desktop_media_id.h"
#include "content/public/browser/media_stream_request.h"
#include "content/public/browser/select_audio_output_request.h"
#include "third_party/blink/public/common/mediastream/media_stream_request.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom-shared.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/native_widget_types.h"
namespace content {
struct MediaStreamRequest;
class RenderFrameHostDelegate;
// MediaStreamUIProxy proxies calls to media stream UI between IO thread and UI
// thread. One instance of this class is created per MediaStream object. It must
// be created, used and destroyed on the IO thread.
class CONTENT_EXPORT MediaStreamUIProxy {
public:
using ResponseCallback = base::OnceCallback<void(
const blink::mojom::StreamDevicesSet& stream_devices_set,
blink::mojom::MediaStreamRequestResult result)>;
using WindowIdCallback =
base::OnceCallback<void(gfx::NativeViewId window_id)>;
static std::unique_ptr<MediaStreamUIProxy> Create();
static std::unique_ptr<MediaStreamUIProxy> CreateForTests(
RenderFrameHostDelegate* render_delegate);
MediaStreamUIProxy(const MediaStreamUIProxy&) = delete;
MediaStreamUIProxy& operator=(const MediaStreamUIProxy&) = delete;
virtual ~MediaStreamUIProxy();
// Requests access for the MediaStream by calling
// WebContentsDelegate::RequestMediaAccessPermission(). The specified
// |response_callback| is called when the WebContentsDelegate approves or
// denies request.
virtual void RequestAccess(std::unique_ptr<MediaStreamRequest> request,
ResponseCallback response_callback);
// Forwards the request to select an audio output device to the
// RenderFrameHostDelegate associated with the given render frame.
virtual void RequestSelectAudioOutput(
std::unique_ptr<SelectAudioOutputRequest> request,
SelectAudioOutputCallback callback);
// Notifies the UI that the MediaStream has started. Must be called after
// access has been approved using RequestAccess().
// |stop_callback| is called on the IO thread when the user requests to stop
// the stream or when it needs to be stopped due to admin policies to protect
// confidential data from being shared. |source_callback| is called on the IO
// thread after the user has requests the stream source to be changed.
// |window_id_callback| is called on the IO thread with the platform-
// dependent window ID of the UI.
// |label| is the unique label of the stream's request.
// |screen_share_ids| is a list of media IDs of the started desktop captures.
// |state_change_callback| is called on the IO thread when the stream should
// be paused on unpaused.
virtual void OnStarted(
base::OnceClosure stop_callback,
MediaStreamUI::SourceCallback source_callback,
WindowIdCallback window_id_callback,
const std::string& label,
std::vector<DesktopMediaID> screen_share_ids,
MediaStreamUI::StateChangeCallback state_change_callback);
// Notifies the UI that the MediaStream is being stopped.
// |label| is the unique label of the stream's request.
// |media_id| is the media ID of the capture that's being stopped.
virtual void OnDeviceStopped(const std::string& label,
const DesktopMediaID& media_id);
// Notifies the UI that the MediaStream is being stopped, similar to
// OnDeviceStopped(), but also notifies (on ChromeOS devices) the DLP module
// that the source for an existing stream is being changed. |label| is the
// unique label of the stream's request. |media_id| is the old media ID of the
// capture that's being stopped.
virtual void OnDeviceStoppedForSourceChange(
const std::string& label,
const DesktopMediaID& old_media_id,
const DesktopMediaID& new_media_id,
bool captured_surface_control_active);
virtual void OnRegionCaptureRectChanged(
const std::optional<gfx::Rect>& region_capture_rect);
#if !BUILDFLAG(IS_ANDROID)
// Determines whether the captured display surface represented by |media_id|
// should be focused or not.
// Only the first call to this method on a given object has an effect; the
// rest are ignored.
//
// |is_from_microtask| and |is_from_timer| are used to distinguish:
// a. Explicit calls from the Web-application.
// b. Implicit calls resulting from the focusability-window-closing microtask.
// c. The browser-side timer.
// This distinction is reflected by UMA.
virtual void SetFocus(const DesktopMediaID& media_id,
bool focus,
bool is_from_microtask,
bool is_from_timer);
#endif
protected:
explicit MediaStreamUIProxy(RenderFrameHostDelegate* test_render_delegate);
private:
class Core;
friend class Core;
friend class FakeMediaStreamUIProxy;
void ProcessAccessRequestResponse(
blink::mojom::StreamDevicesSetPtr stream_devices_set,
blink::mojom::MediaStreamRequestResult result);
void ProcessStopRequestFromUI();
void ProcessChangeSourceRequestFromUI(const DesktopMediaID& media_id,
bool captured_surface_control_active);
void ProcessStateChangeFromUI(const DesktopMediaID& media_id,
blink::mojom::MediaStreamStateChange new_state);
void OnWindowId(WindowIdCallback window_id_callback,
gfx::NativeViewId* window_id);
std::unique_ptr<Core, content::BrowserThread::DeleteOnUIThread> core_;
ResponseCallback response_callback_;
base::OnceClosure stop_callback_;
MediaStreamUI::SourceCallback source_callback_;
MediaStreamUI::StateChangeCallback state_change_callback_;
base::WeakPtrFactory<MediaStreamUIProxy> weak_factory_{this};
};
class CONTENT_EXPORT FakeMediaStreamUIProxy : public MediaStreamUIProxy {
public:
// Set |tests_use_fake_render_frame_hosts| to false if the test that's
// creating the FakeMediaStreamUIProxy creates real RFH objects or true if it
// just passes in dummy IDs to refer to RFHs.
explicit FakeMediaStreamUIProxy(bool tests_use_fake_render_frame_hosts);
FakeMediaStreamUIProxy(const FakeMediaStreamUIProxy&) = delete;
FakeMediaStreamUIProxy& operator=(const FakeMediaStreamUIProxy&) = delete;
~FakeMediaStreamUIProxy() override;
void AddAvailableDevices(const blink::MediaStreamDevices& devices);
void SetMicAccess(bool access);
void SetCameraAccess(bool access);
void SetAudioShare(bool audio_share);
// MediaStreamUIProxy overrides.
void RequestAccess(std::unique_ptr<MediaStreamRequest> request,
ResponseCallback response_callback) override;
void RequestSelectAudioOutput(
std::unique_ptr<SelectAudioOutputRequest> request,
SelectAudioOutputCallback callback) override;
void OnStarted(
base::OnceClosure stop_callback,
MediaStreamUI::SourceCallback source_callback,
WindowIdCallback window_id_callback,
const std::string& label,
std::vector<DesktopMediaID> screen_share_ids,
MediaStreamUI::StateChangeCallback state_change_callback) override;
void OnDeviceStopped(const std::string& label,
const DesktopMediaID& media_id) override;
void OnDeviceStoppedForSourceChange(
const std::string& label,
const DesktopMediaID& old_media_id,
const DesktopMediaID& new_media_id,
bool captured_surface_control_active) override;
private:
// This is used for RequestAccess().
// TODO(crbug.com/40220802): Use blink::mojom::StreamDevices instead of
// blink::MediaStreamDevices.
blink::MediaStreamDevices devices_;
// These are used for CheckAccess().
bool mic_access_ = true;
bool camera_access_ = true;
bool audio_share_ = true;
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_UI_PROXY_H_
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