blob: a9687233ab926a2f83a6f91e053f4ea0478f5e79 [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 <vector>
#include "base/macros.h"
#include "content/public/browser/web_contents_observer.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "services/media_session/public/mojom/media_session.mojom.h"
namespace content {
class MediaSession;
} // namespace content
namespace chromecast {
// This class implements a blocking mode for web applications and is used in
// Chromecast internal code. Media is unblocked by default.
class CastMediaBlocker : public content::WebContentsObserver,
public media_session::mojom::MediaSessionObserver {
// Observes WebContents and MediaSession.
explicit CastMediaBlocker(content::WebContents* web_contents);
// Observes only the MediaSession.
explicit CastMediaBlocker(content::MediaSession* media_session);
~CastMediaBlocker() override;
// Sets if the web contents is allowed to play media or not. If media is
// unblocked, previously suspended elements should begin playing again.
void BlockMediaLoading(bool blocked);
void EnableBackgroundVideoPlayback(bool enabled);
// media_session::mojom::MediaSessionObserver implementation:
void MediaSessionInfoChanged(
media_session::mojom::MediaSessionInfoPtr session_info) override;
void MediaSessionMetadataChanged(
const base::Optional<media_session::MediaMetadata>& metadata) override {}
void MediaSessionActionsChanged(
const std::vector<media_session::mojom::MediaSessionAction>& action)
override {}
void MediaSessionImagesChanged(
const base::flat_map<media_session::mojom::MediaSessionImageType,
std::vector<media_session::MediaImage>>& images)
override {}
bool media_loading_blocked() const { return blocked_; }
// content::WebContentsObserver implementation:
void RenderFrameCreated(content::RenderFrameHost* render_frame_host) override;
void RenderViewReady() override;
// Suspends or resumes the media session for the web contents.
void Suspend();
void Resume();
// Blocks or unblocks the render process from loading new media
// according to |blocked_|.
void UpdateMediaBlockedState();
void UpdateRenderFrameMediaBlockedState(
content::RenderFrameHost* render_frame_host);
void UpdateBackgroundVideoPlaybackState();
void UpdateRenderFrameBackgroundVideoPlaybackState(
content::RenderFrameHost* frame);
// Whether or not media should be blocked. This value cache's the last call to
// BlockMediaLoading. Is false by default.
bool blocked_;
// Whether or not the user paused media on the page.
bool paused_by_user_;
// Whether or not media in the app can be controlled and if media is currently
// suspended. These variables cache arguments from MediaSessionStateChanged().
bool suspended_;
bool controllable_;
// Setting for whether or not the WebContents should suspend video when the
// content is put into the background. For most content, this setting should
// be disabled.
bool background_video_playback_enabled_;
content::MediaSession* const media_session_;
mojo::Binding<media_session::mojom::MediaSessionObserver> observer_binding_{
} // namespace chromecast