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// Copyright 2012 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_DISPATCHER_HOST_H_
#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_
#include <string>
#include <utility>
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/synchronization/lock.h"
#include "build/build_config.h"
#include "content/browser/bad_message.h"
#include "content/browser/media/media_devices_util.h"
#include "content/browser/media/media_stream_web_contents_observer.h"
#include "content/common/content_export.h"
#include "content/public/browser/browser_thread.h"
#include "media/capture/mojom/video_capture_types.mojom.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/common/mediastream/media_stream_controls.h"
#include "third_party/blink/public/mojom/mediastream/media_devices.mojom.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom.h"
namespace content {
class MediaStreamManager;
// MediaStreamDispatcherHost is a delegate for Media Stream API messages used by
// MediaStreamImpl. There is one MediaStreamDispatcherHost per
// RenderFrameHost, the former owned by the latter.
class CONTENT_EXPORT MediaStreamDispatcherHost
: public blink::mojom::MediaStreamDispatcherHost {
public:
MediaStreamDispatcherHost(GlobalRenderFrameHostId render_frame_host_id,
MediaStreamManager* media_stream_manager);
MediaStreamDispatcherHost(const MediaStreamDispatcherHost&) = delete;
MediaStreamDispatcherHost& operator=(const MediaStreamDispatcherHost&) =
delete;
~MediaStreamDispatcherHost() override;
static void Create(
GlobalRenderFrameHostId render_frame_host_id,
MediaStreamManager* media_stream_manager,
mojo::PendingReceiver<blink::mojom::MediaStreamDispatcherHost> receiver);
void OnWebContentsFocused();
void set_get_salt_and_origin_cb_for_testing(
GetMediaDeviceSaltAndOriginCallback callback) {
get_salt_and_origin_cb_ = std::move(callback);
}
void SetMediaStreamDeviceObserverForTesting(
mojo::PendingRemote<blink::mojom::MediaStreamDeviceObserver> observer) {
media_stream_device_observer_.Bind(std::move(observer));
}
private:
friend class MediaStreamDispatcherHostTest;
friend class MockMediaStreamDispatcherHost;
FRIEND_TEST_ALL_PREFIXES(MediaStreamDispatcherHostMultiCaptureTest,
NoRenderFrameHostMultiCaptureNotAllowed);
FRIEND_TEST_ALL_PREFIXES(
MediaStreamDispatcherHostMultiCaptureTest,
RenderFrameHostExistsButNoPolicySetMultiCaptureNotAllowed);
FRIEND_TEST_ALL_PREFIXES(MediaStreamDispatcherHostMultiCaptureTest,
PolicySetMultiCaptureAllowed);
struct GenerateStreamsUIThreadCheckResult {
bool request_allowed = false;
MediaDeviceSaltAndOrigin salt_and_origin;
};
struct PendingAccessRequest;
using RequestsQueue =
base::circular_deque<std::unique_ptr<PendingAccessRequest>>;
RequestsQueue pending_requests_;
// Performs checks / computations that need to be done on the UI
// thread (i.e. if a select all screens request is permitted and
// the computation of the device salt and origin).
static void GenerateStreamsChecksOnUIThread(
GlobalRenderFrameHostId render_frame_host_id,
bool request_all_screens,
base::OnceCallback<void(MediaDeviceSaltAndOriginCallback)>
get_salt_and_origin_cb,
base::OnceCallback<void(GenerateStreamsUIThreadCheckResult)>
result_callback);
static void CheckRequestAllScreensAllowed(
base::OnceCallback<void(MediaDeviceSaltAndOriginCallback)>
get_salt_and_origin_cb,
base::OnceCallback<void(GenerateStreamsUIThreadCheckResult)>
result_callback,
GlobalRenderFrameHostId render_frame_host_id);
static void CheckStreamsPermissionResultReceived(
base::OnceCallback<void(MediaDeviceSaltAndOriginCallback)>
get_salt_and_origin_cb,
base::OnceCallback<void(GenerateStreamsUIThreadCheckResult)>
result_callback,
bool result);
const mojo::Remote<blink::mojom::MediaStreamDeviceObserver>&
GetMediaStreamDeviceObserver();
void OnMediaStreamDeviceObserverConnectionError();
void CancelAllRequests();
// mojom::MediaStreamDispatcherHost implementation
void GenerateStreams(
int32_t request_id,
const blink::StreamControls& controls,
bool user_gesture,
blink::mojom::StreamSelectionInfoPtr audio_stream_selection_info_ptr,
GenerateStreamsCallback callback) override;
void CancelRequest(int32_t request_id) override;
void StopStreamDevice(
const std::string& device_id,
const std::optional<base::UnguessableToken>& session_id) override;
void OpenDevice(int32_t request_id,
const std::string& device_id,
blink::mojom::MediaStreamType type,
OpenDeviceCallback callback) override;
void CloseDevice(const std::string& label) override;
void SetCapturingLinkSecured(
const std::optional<base::UnguessableToken>& session_id,
blink::mojom::MediaStreamType type,
bool is_secure) override;
using KeepDeviceAliveForTransferCallback =
base::OnceCallback<void(bool device_found)>;
void KeepDeviceAliveForTransfer(
const base::UnguessableToken& session_id,
const base::UnguessableToken& transfer_id,
KeepDeviceAliveForTransferCallback callback) override;
#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
void FocusCapturedSurface(const std::string& label, bool focus) override;
void ApplySubCaptureTarget(const base::UnguessableToken& session_id,
media::mojom::SubCaptureTargetType type,
const base::Token& sub_capture_target,
uint32_t sub_capture_target_version,
ApplySubCaptureTargetCallback callback) override;
void SendWheel(const base::UnguessableToken& session_id,
blink::mojom::CapturedWheelActionPtr action) override;
void UpdateZoomLevel(const base::UnguessableToken& session_id,
blink::mojom::ZoomLevelAction action,
UpdateZoomLevelCallback callback) override;
void RequestCapturedSurfaceControlPermission(
const base::UnguessableToken& session_id,
RequestCapturedSurfaceControlPermissionCallback callback) override;
void OnSubCaptureTargetValidationComplete(
const base::UnguessableToken& session_id,
media::mojom::SubCaptureTargetType type,
const base::Token& target,
uint32_t sub_capture_target_version,
ApplySubCaptureTargetCallback callback,
bool target_passed_validation);
#endif
void GetOpenDevice(int32_t page_request_id,
const base::UnguessableToken& session_id,
const base::UnguessableToken& transfer_id,
GetOpenDeviceCallback callback) override;
void DoGetOpenDevice(int32_t page_request_id,
const base::UnguessableToken& session_id,
const base::UnguessableToken& transfer_id,
GetOpenDeviceCallback callback,
const MediaDeviceSaltAndOrigin& salt_and_origin);
void DoGenerateStreams(
int32_t request_id,
const blink::StreamControls& controls,
bool user_gesture,
blink::mojom::StreamSelectionInfoPtr audio_stream_selection_info_ptr,
GenerateStreamsCallback callback,
GenerateStreamsUIThreadCheckResult ui_check_result);
void DoOpenDevice(int32_t request_id,
const std::string& device_id,
blink::mojom::MediaStreamType type,
OpenDeviceCallback callback,
const MediaDeviceSaltAndOrigin& salt_and_origin);
void OnDeviceStopped(const std::string& label,
const blink::MediaStreamDevice& device);
void OnDeviceChanged(const std::string& label,
const blink::MediaStreamDevice& old_device,
const blink::MediaStreamDevice& new_device);
void OnDeviceRequestStateChange(
const std::string& label,
const blink::MediaStreamDevice& device,
const blink::mojom::MediaStreamStateChange new_state);
void OnDeviceCaptureConfigurationChange(
const std::string& label,
const blink::MediaStreamDevice& device);
void OnDeviceCaptureHandleChange(const std::string& label,
const blink::MediaStreamDevice& device);
void OnZoomLevelChange(const std::string& label,
const blink::MediaStreamDevice& device,
int zoom_level);
void SetWebContentsObserver(
std::unique_ptr<MediaStreamWebContentsObserver,
BrowserThread::DeleteOnUIThread> web_contents_observer);
// If valid, std::nullopt is returned.
// If invalid, the relevant BadMessageReason is returned.
std::optional<bad_message::BadMessageReason>
ValidateControlsForGenerateStreams(const blink::StreamControls& controls);
void ReceivedBadMessage(int render_process_id,
bad_message::BadMessageReason reason);
void SetBadMessageCallbackForTesting(
base::RepeatingCallback<void(int, bad_message::BadMessageReason)>
callback);
static int next_requester_id_;
const GlobalRenderFrameHostId render_frame_host_id_;
const int requester_id_;
raw_ptr<MediaStreamManager> media_stream_manager_;
mojo::Remote<blink::mojom::MediaStreamDeviceObserver>
media_stream_device_observer_;
GetMediaDeviceSaltAndOriginCallback get_salt_and_origin_cb_;
std::unique_ptr<MediaStreamWebContentsObserver,
BrowserThread::DeleteOnUIThread>
web_contents_observer_;
base::RepeatingCallback<void(int, bad_message::BadMessageReason)>
bad_message_callback_for_testing_;
base::WeakPtrFactory<MediaStreamDispatcherHost> weak_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_
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