blob: 10b338f8103bd97a95092c037a2df82d905a2d0a [file] [log] [blame]
// Copyright 2016 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.
#include "base/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/optional.h"
#include "media/base/media_observer.h"
#include "media/remoting/metrics.h"
#include "media/remoting/shared_session.h"
namespace media {
namespace remoting {
class RpcBroker;
// This class:
// 1) Implements the SharedSession::Client;
// 2) Monitors player events as a MediaObserver;
// 3) May trigger the switch of the media renderer between local playback
// and remoting.
class RendererController final : public SharedSession::Client,
public MediaObserver {
explicit RendererController(scoped_refptr<SharedSession> session);
~RendererController() override;
// SharedSession::Client implementation.
void OnStarted(bool success) override;
void OnSessionStateChanged() override;
// MediaObserver implementation.
void OnEnteredFullscreen() override;
void OnExitedFullscreen() override;
void OnBecameDominantVisibleContent(bool is_dominant) override;
void OnSetCdm(CdmContext* cdm_context) override;
void OnMetadataChanged(const PipelineMetadata& metadata) override;
void OnRemotePlaybackDisabled(bool disabled) override;
void OnPlaying() override;
void OnPaused() override;
void SetClient(MediaObserverClient* client) override;
base::WeakPtr<RendererController> GetWeakPtr() {
return weak_factory_.GetWeakPtr();
// Used by AdaptiveRendererFactory to query whether to create a Media
// Remoting Renderer.
bool remote_rendering_started() const {
return remote_rendering_started_;
void StartDataPipe(std::unique_ptr<mojo::DataPipe> audio_data_pipe,
std::unique_ptr<mojo::DataPipe> video_data_pipe,
const SharedSession::DataPipeStartCallback& done_callback);
// Used by CourierRenderer to query the session state.
SharedSession* session() const { return session_.get(); }
base::WeakPtr<RpcBroker> GetRpcBroker() const;
// Called by CourierRenderer when it encountered a fatal error. This will
// cause remoting to shut down and never start back up for the lifetime of
// this controller.
void OnRendererFatalError(StopTrigger stop_trigger);
bool has_audio() const {
return pipeline_metadata_.has_audio &&
bool has_video() const {
return pipeline_metadata_.has_video &&
// Called when the session availability state may have changed. Each call to
// this method could cause a remoting session to be started or stopped; and if
// that happens, the |start_trigger| or |stop_trigger| must be the reason.
void UpdateFromSessionState(StartTrigger start_trigger,
StopTrigger stop_trigger);
bool IsVideoCodecSupported();
bool IsAudioCodecSupported();
bool IsRemoteSinkAvailable();
// Helper to decide whether to enter or leave Remoting mode.
bool ShouldBeRemoting();
// Determines whether to enter or leave Remoting mode and switches if
// necessary. Each call to this method could cause a remoting session to be
// started or stopped; and if that happens, the |start_trigger| or
// |stop_trigger| must be the reason.
void UpdateAndMaybeSwitch(StartTrigger start_trigger,
StopTrigger stop_trigger);
// Indicates whether this media element is in full screen.
bool is_fullscreen_ = false;
// Indicates whether remoting is started.
bool remote_rendering_started_ = false;
// Indicates whether audio or video is encrypted.
bool is_encrypted_ = false;
// Indicates whether remote playback is currently disabled. This starts out as
// true, and should be updated at least once via a call to
// OnRemotePlaybackDisabled() at some point in the future. A web page
// typically sets/removes the disableRemotePlayback attribute on a
// HTMLMediaElement to disable/enable remoting of its content. Please see the
// Remote Playback API spec for more details:
bool is_remote_playback_disabled_ = true;
// Indicates whether video is the dominant visible content in the tab.
bool is_dominant_content_ = false;
// Indicates whether video is paused.
bool is_paused_ = true;
// Indicates whether OnRendererFatalError() has been called. This indicates
// one of several possible problems: 1) An environmental problem such as
// out-of-memory, insufficient network bandwidth, etc. 2) The receiver may
// have been unable to play-out the content correctly (e.g., not capable of a
// high frame rate at a high resolution). 3) An implementation bug. In any
// case, once a renderer encounters a fatal error, remoting will be shut down
// and never start again for the lifetime of this controller.
bool encountered_renderer_fatal_error_ = false;
// This is initially the SharedSession passed to the ctor, and might be
// replaced with a different instance later if OnSetCdm() is called.
scoped_refptr<SharedSession> session_;
// This is used to check all the methods are called on the current thread in
// debug builds.
base::ThreadChecker thread_checker_;
// Current pipeline metadata.
PipelineMetadata pipeline_metadata_;
// Records session events of interest.
SessionMetricsRecorder metrics_recorder_;
// Not own by this class. Can only be set once by calling SetClient().
MediaObserverClient* client_ = nullptr;
base::WeakPtrFactory<RendererController> weak_factory_;
} // namespace remoting
} // namespace media