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content / browser / media / media_web_contents_observer.cc [blame]
// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/media/media_web_contents_observer.h"
#include <memory>
#include <tuple>
#include "base/debug/crash_logging.h"
#include "base/debug/dump_without_crashing.h"
#include "base/functional/bind.h"
#include "base/memory/raw_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "build/build_config.h"
#include "content/browser/media/audible_metrics.h"
#include "content/browser/media/media_devices_util.h"
#include "content/browser/renderer_host/media/media_stream_manager.h"
#include "content/browser/renderer_host/render_frame_host_impl.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/web_contents.h"
#include "mojo/public/cpp/bindings/message.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "services/device/public/mojom/wake_lock_context.mojom.h"
#include "services/media_session/public/cpp/media_position.h"
#include "third_party/blink/public/common/mediastream/media_devices.h"
#include "third_party/blink/public/platform/web_fullscreen_video_status.h"
#include "ui/gfx/geometry/size.h"
namespace content {
namespace {
AudibleMetrics* GetAudibleMetrics() {
static AudibleMetrics* metrics = new AudibleMetrics();
return metrics;
}
} // anonymous namespace
// Maintains state for a single player. Issues WebContents and power-related
// notifications appropriate for state changes.
class MediaWebContentsObserver::PlayerInfo {
public:
PlayerInfo(const MediaPlayerId& id, MediaWebContentsObserver* observer)
: id_(id), observer_(observer) {}
~PlayerInfo() {
if (is_playing_) {
NotifyPlayerStopped(WebContentsObserver::MediaStoppedReason::kUnspecified,
MediaPowerExperimentManager::NotificationMode::kSkip);
}
}
PlayerInfo(const PlayerInfo&) = delete;
PlayerInfo& operator=(const PlayerInfo&) = delete;
void set_has_audio(bool has_audio) { has_audio_ = has_audio; }
bool has_video() const { return has_video_; }
void set_has_video(bool has_video) { has_video_ = has_video; }
void set_muted(bool muted) { muted_ = muted; }
bool is_playing() const { return is_playing_; }
void SetIsPlaying() {
DCHECK(!is_playing_);
is_playing_ = true;
NotifyPlayerStarted();
}
void SetIsStopped(bool reached_end_of_stream) {
DCHECK(is_playing_);
is_playing_ = false;
NotifyPlayerStopped(
reached_end_of_stream
? WebContentsObserver::MediaStoppedReason::kReachedEndOfStream
: WebContentsObserver::MediaStoppedReason::kUnspecified,
MediaPowerExperimentManager::NotificationMode::kNotify);
}
bool IsAudible() const { return has_audio_ && is_playing_ && !muted_; }
GlobalRenderFrameHostId GetHostId() { return id_.frame_routing_id; }
private:
void NotifyPlayerStarted() {
observer_->web_contents_impl()->MediaStartedPlaying(
WebContentsObserver::MediaPlayerInfo(has_video_, has_audio_), id_);
if (observer_->power_experiment_manager_) {
auto* render_frame_host = RenderFrameHost::FromID(id_.frame_routing_id);
DCHECK(render_frame_host);
// Bind the callback to a WeakPtr for the frame, so that we won't try to
// notify the frame after it's been destroyed.
observer_->power_experiment_manager_->PlayerStarted(
id_, base::BindRepeating(
&MediaWebContentsObserver::OnExperimentStateChanged,
observer_->GetWeakPtrForFrame(render_frame_host), id_));
}
}
void NotifyPlayerStopped(
WebContentsObserver::MediaStoppedReason stopped_reason,
MediaPowerExperimentManager::NotificationMode notification_mode) {
observer_->web_contents_impl()->MediaStoppedPlaying(
WebContentsObserver::MediaPlayerInfo(has_video_, has_audio_), id_,
stopped_reason);
if (observer_->power_experiment_manager_) {
observer_->power_experiment_manager_->PlayerStopped(id_,
notification_mode);
}
}
const MediaPlayerId id_;
const raw_ptr<MediaWebContentsObserver> observer_;
bool has_audio_ = false;
bool has_video_ = false;
bool muted_ = false;
bool is_playing_ = false;
};
MediaWebContentsObserver::MediaWebContentsObserver(
WebContentsImpl* web_contents)
: WebContentsObserver(web_contents),
audible_metrics_(GetAudibleMetrics()),
session_controllers_manager_(
std::make_unique<MediaSessionControllersManager>(web_contents)),
power_experiment_manager_(MediaPowerExperimentManager::Instance()) {}
MediaWebContentsObserver::~MediaWebContentsObserver() = default;
void MediaWebContentsObserver::WebContentsDestroyed() {
CHECK_CURRENTLY_ON(BrowserThread::UI);
use_after_free_checker_.check();
AudioStreamMonitor* audio_stream_monitor =
web_contents_impl()->audio_stream_monitor();
audible_metrics_->WebContentsDestroyed(
web_contents(), audio_stream_monitor->WasRecentlyAudible() &&
!web_contents()->IsAudioMuted());
// Remove all players so that the experiment manager is notified.
player_info_map_.clear();
// Remove all the mojo receivers and remotes associated to the media players
// handled by this WebContents to prevent from handling/sending any more
// messages after this point, plus properly cleaning things up.
media_player_hosts_.clear();
media_player_observer_hosts_.clear();
media_player_remotes_.clear();
session_controllers_manager_.reset();
fullscreen_player_.reset();
}
void MediaWebContentsObserver::RenderFrameDeleted(
RenderFrameHost* render_frame_host) {
CHECK_CURRENTLY_ON(BrowserThread::UI);
use_after_free_checker_.check();
GlobalRenderFrameHostId frame_routing_id = render_frame_host->GetGlobalId();
// This cannot just use `base::EraseIf()`, because some observers call back
// into `this` and query player info when a PlayerInfo is destroyed (!!).
// Re-entering a container while erasing an entry is generally not very safe
// or robust.
for (auto it = player_info_map_.begin(); it != player_info_map_.end();) {
if (it->first.frame_routing_id != frame_routing_id) {
++it;
continue;
}
// Instead, remove entries in a multi-step process:
// 1. Move ownership of the PlayerInfo out of the map.
// 2. Erase the entry from the map.
// 3. Destroy the PlayerInfo (by letting it go out of scope).
// Because the entry is already gone from the map, GetPlayerInfo() will
// return null instead of trying to compare keys that are potentially
// destroyed.
auto player_info = std::move(it->second);
it = player_info_map_.erase(it);
}
base::EraseIf(media_player_hosts_,
[frame_routing_id](const MediaPlayerHostImplMap::value_type&
media_player_hosts_value_type) {
return frame_routing_id ==
media_player_hosts_value_type.first;
});
base::EraseIf(
media_player_observer_hosts_,
[frame_routing_id](const MediaPlayerObserverHostImplMap::value_type&
media_player_observer_hosts_value_type) {
return frame_routing_id ==
media_player_observer_hosts_value_type.first.frame_routing_id;
});
std::vector<MediaPlayerId> removed_media_players;
base::EraseIf(
media_player_remotes_, [&](const MediaPlayerRemotesMap::value_type&
media_player_remotes_value_type) {
const MediaPlayerId& player_id = media_player_remotes_value_type.first;
if (frame_routing_id == player_id.frame_routing_id) {
removed_media_players.push_back(player_id);
return true;
}
return false;
});
for (const MediaPlayerId& player_id : removed_media_players) {
// Call MediaDestroyed() after all state associated with the media player is
// deleted, to ensure that observers see up-to-date state. For example,
// HasActiveEffectivelyFullscreenVideo() should return false if `player_id`
// was the only fullscreen media.
web_contents_impl()->MediaDestroyed(player_id);
}
session_controllers_manager_->RenderFrameDeleted(render_frame_host);
if (fullscreen_player_ &&
fullscreen_player_->frame_routing_id == frame_routing_id) {
picture_in_picture_allowed_in_fullscreen_.reset();
fullscreen_player_.reset();
}
// Cancel any pending callbacks for players from this frame.
use_after_free_checker_.check();
per_frame_factory_.erase(render_frame_host);
}
void MediaWebContentsObserver::MaybeUpdateAudibleState() {
AudioStreamMonitor* audio_stream_monitor =
web_contents_impl()->audio_stream_monitor();
if (audio_stream_monitor->WasRecentlyAudible())
LockAudio();
else
CancelAudioLock();
audible_metrics_->UpdateAudibleWebContentsState(
web_contents(), audio_stream_monitor->IsCurrentlyAudible() &&
!web_contents()->IsAudioMuted());
}
bool MediaWebContentsObserver::HasActiveEffectivelyFullscreenVideo() const {
CHECK_CURRENTLY_ON(BrowserThread::UI);
use_after_free_checker_.check();
CHECK(!fullscreen_player_.has_value() ||
picture_in_picture_allowed_in_fullscreen_.has_value());
if (!web_contents()->IsFullscreen() || !fullscreen_player_)
return false;
// Check that the player is active.
if (const PlayerInfo* player_info = GetPlayerInfo(*fullscreen_player_))
return player_info->is_playing() && player_info->has_video();
return false;
}
bool MediaWebContentsObserver::IsPictureInPictureAllowedForFullscreenVideo()
const {
CHECK_CURRENTLY_ON(BrowserThread::UI);
use_after_free_checker_.check();
CHECK(fullscreen_player_.has_value());
CHECK(picture_in_picture_allowed_in_fullscreen_.has_value());
return *picture_in_picture_allowed_in_fullscreen_;
}
const std::optional<MediaPlayerId>&
MediaWebContentsObserver::GetFullscreenVideoMediaPlayerId() const {
return fullscreen_player_;
}
void MediaWebContentsObserver::MediaPictureInPictureChanged(
bool is_picture_in_picture) {
session_controllers_manager_->PictureInPictureStateChanged(
is_picture_in_picture);
}
void MediaWebContentsObserver::DidUpdateAudioMutingState(bool muted) {
session_controllers_manager_->WebContentsMutedStateChanged(muted);
}
void MediaWebContentsObserver::GetHasPlayedBefore(
GetHasPlayedBeforeCallback callback) {
std::move(callback).Run(has_played_before_);
}
void MediaWebContentsObserver::BindMediaPlayerObserverClient(
mojo::PendingReceiver<media::mojom::MediaPlayerObserverClient>
pending_receiver) {
receivers_.Add(this, std::move(pending_receiver));
}
void MediaWebContentsObserver::RequestPersistentVideo(bool value) {
if (!fullscreen_player_)
return;
// The message is sent to the renderer even though the video is already the
// fullscreen element itself. It will eventually be handled by Blink.
GetMediaPlayerRemote(*fullscreen_player_)->SetPersistentState(value);
}
bool MediaWebContentsObserver::IsPlayerActive(
const MediaPlayerId& player_id) const {
if (const PlayerInfo* player_info = GetPlayerInfo(player_id))
return player_info->is_playing();
return false;
}
// MediaWebContentsObserver::MediaPlayerHostImpl
MediaWebContentsObserver::MediaPlayerHostImpl::MediaPlayerHostImpl(
GlobalRenderFrameHostId frame_routing_id,
MediaWebContentsObserver* media_web_contents_observer)
: frame_routing_id_(frame_routing_id),
media_web_contents_observer_(media_web_contents_observer) {}
MediaWebContentsObserver::MediaPlayerHostImpl::~MediaPlayerHostImpl() = default;
void MediaWebContentsObserver::MediaPlayerHostImpl::AddMediaPlayerHostReceiver(
mojo::PendingAssociatedReceiver<media::mojom::MediaPlayerHost> receiver) {
receivers_.Add(this, std::move(receiver));
}
void MediaWebContentsObserver::MediaPlayerHostImpl::OnMediaPlayerAdded(
mojo::PendingAssociatedRemote<media::mojom::MediaPlayer> media_player,
mojo::PendingAssociatedReceiver<media::mojom::MediaPlayerObserver>
media_player_observer,
int32_t player_id) {
media_web_contents_observer_->OnMediaPlayerAdded(
std::move(media_player), std::move(media_player_observer),
MediaPlayerId(frame_routing_id_, player_id));
}
// MediaWebContentsObserver::MediaPlayerObserverHostImpl
MediaWebContentsObserver::MediaPlayerObserverHostImpl::
MediaPlayerObserverHostImpl(
const MediaPlayerId& media_player_id,
MediaWebContentsObserver* media_web_contents_observer)
: media_player_id_(media_player_id),
media_web_contents_observer_(media_web_contents_observer) {}
MediaWebContentsObserver::MediaPlayerObserverHostImpl::
~MediaPlayerObserverHostImpl() = default;
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
BindMediaPlayerObserverReceiver(
mojo::PendingAssociatedReceiver<media::mojom::MediaPlayerObserver>
media_player_observer) {
media_player_observer_receiver_.Bind(std::move(media_player_observer));
// |media_web_contents_observer_| outlives MediaPlayerHostImpl, so it's safe
// to use base::Unretained().
media_player_observer_receiver_.set_disconnect_handler(base::BindOnce(
&MediaWebContentsObserver::OnMediaPlayerObserverDisconnected,
base::Unretained(media_web_contents_observer_), media_player_id_));
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
OnMutedStatusChanged(bool muted) {
media_web_contents_observer_->web_contents_impl()->MediaMutedStatusChanged(
media_player_id_, muted);
media_web_contents_observer_->session_controllers_manager()
->OnMediaMutedStatusChanged(media_player_id_, muted);
PlayerInfo* player_info = GetPlayerInfo();
if (!player_info)
return;
player_info->set_muted(muted);
NotifyAudioStreamMonitorIfNeeded();
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
OnMediaMetadataChanged(bool has_audio,
bool has_video,
media::MediaContentType media_content_type) {
media_web_contents_observer_->OnMediaMetadataChanged(
media_player_id_, has_audio, has_video, media_content_type);
NotifyAudioStreamMonitorIfNeeded();
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
OnMediaPositionStateChanged(
const media_session::MediaPosition& media_position) {
media_web_contents_observer_->session_controllers_manager()
->OnMediaPositionStateChanged(media_player_id_, media_position);
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
OnMediaEffectivelyFullscreenChanged(
blink::WebFullscreenVideoStatus status) {
media_web_contents_observer_->OnMediaEffectivelyFullscreenChanged(
media_player_id_, status);
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::OnMediaSizeChanged(
const ::gfx::Size& size) {
media_web_contents_observer_->web_contents_impl()->MediaResized(
size, media_player_id_);
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
OnPictureInPictureAvailabilityChanged(bool available) {
media_web_contents_observer_->session_controllers_manager()
->OnPictureInPictureAvailabilityChanged(media_player_id_, available);
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
OnAudioOutputSinkChanged(const std::string& hashed_device_id) {
auto* render_frame_host =
RenderFrameHost::FromID(media_player_id_.frame_routing_id);
DCHECK(render_frame_host);
content::GetRawDeviceIdFromHMAC(
render_frame_host->GetGlobalId(), hashed_device_id,
blink::mojom::MediaDeviceType::kMediaAudioOutput,
base::BindOnce(&MediaPlayerObserverHostImpl::OnReceivedTranslatedDeviceId,
weak_factory_.GetWeakPtr()));
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
OnReceivedTranslatedDeviceId(
const std::optional<std::string>& translated_id) {
if (!translated_id)
return;
media_web_contents_observer_->OnAudioOutputSinkChangedWithRawDeviceId(
media_player_id_, *translated_id);
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
OnUseAudioServiceChanged(bool uses_audio_service) {
uses_audio_service_ = uses_audio_service;
NotifyAudioStreamMonitorIfNeeded();
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
OnAudioOutputSinkChangingDisabled() {
media_web_contents_observer_->session_controllers_manager()
->OnAudioOutputSinkChangingDisabled(media_player_id_);
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
OnRemotePlaybackMetadataChange(
media_session::mojom::RemotePlaybackMetadataPtr
remote_playback_metadata) {
media_web_contents_observer_->OnRemotePlaybackMetadataChange(
media_player_id_, std::move(remote_playback_metadata));
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::OnMediaPlaying() {
PlayerInfo* player_info = GetPlayerInfo();
if (!player_info)
return;
if (!media_web_contents_observer_->session_controllers_manager()->RequestPlay(
media_player_id_)) {
// Return early to avoid spamming WebContents with playing/stopped
// notifications. If RequestPlay() fails, media session will send a pause
// signal right away.
return;
}
if (!player_info->is_playing())
player_info->SetIsPlaying();
media_web_contents_observer_->OnMediaPlaying();
NotifyAudioStreamMonitorIfNeeded();
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::OnMediaPaused(
bool stream_ended) {
PlayerInfo* player_info = GetPlayerInfo();
if (!player_info || !player_info->is_playing())
return;
player_info->SetIsStopped(stream_ended);
media_web_contents_observer_->session_controllers_manager()->OnPause(
media_player_id_, stream_ended);
NotifyAudioStreamMonitorIfNeeded();
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
NotifyAudioStreamMonitorIfNeeded() {
PlayerInfo* player_info = GetPlayerInfo();
if (!player_info)
return;
bool should_add_client = player_info->IsAudible() && !uses_audio_service_;
auto* audio_stream_monitor =
media_web_contents_observer_->web_contents_impl()->audio_stream_monitor();
if (should_add_client && !audio_client_registration_) {
audio_client_registration_ =
audio_stream_monitor->RegisterAudibleClient(player_info->GetHostId());
} else if (!should_add_client && audio_client_registration_) {
audio_client_registration_.reset();
}
}
MediaWebContentsObserver::PlayerInfo*
MediaWebContentsObserver::MediaPlayerObserverHostImpl::GetPlayerInfo() {
return media_web_contents_observer_->GetPlayerInfo(media_player_id_);
}
// MediaWebContentsObserver
MediaWebContentsObserver::PlayerInfo* MediaWebContentsObserver::GetPlayerInfo(
const MediaPlayerId& id) const {
const auto it = player_info_map_.find(id);
return it != player_info_map_.end() ? it->second.get() : nullptr;
}
void MediaWebContentsObserver::OnMediaMetadataChanged(
const MediaPlayerId& player_id,
bool has_audio,
bool has_video,
media::MediaContentType media_content_type) {
PlayerInfo* player_info = GetPlayerInfo(player_id);
if (!player_info) {
PlayerInfoMap::iterator it;
std::tie(it, std::ignore) = player_info_map_.emplace(
player_id, std::make_unique<PlayerInfo>(player_id, this));
player_info = it->second.get();
}
player_info->set_has_audio(has_audio);
player_info->set_has_video(has_video);
session_controllers_manager_->OnMetadata(player_id, has_audio, has_video,
media_content_type);
}
void MediaWebContentsObserver::OnMediaEffectivelyFullscreenChanged(
const MediaPlayerId& player_id,
blink::WebFullscreenVideoStatus fullscreen_status) {
CHECK_CURRENTLY_ON(BrowserThread::UI);
use_after_free_checker_.check();
CHECK(!fullscreen_player_.has_value() ||
picture_in_picture_allowed_in_fullscreen_.has_value());
switch (fullscreen_status) {
case blink::WebFullscreenVideoStatus::kFullscreenAndPictureInPictureEnabled:
fullscreen_player_ = player_id;
picture_in_picture_allowed_in_fullscreen_ = true;
break;
case blink::WebFullscreenVideoStatus::
kFullscreenAndPictureInPictureDisabled:
fullscreen_player_ = player_id;
picture_in_picture_allowed_in_fullscreen_ = false;
break;
case blink::WebFullscreenVideoStatus::kNotEffectivelyFullscreen:
if (!fullscreen_player_ || *fullscreen_player_ != player_id)
return;
picture_in_picture_allowed_in_fullscreen_.reset();
fullscreen_player_.reset();
break;
}
bool is_fullscreen =
(fullscreen_status !=
blink::WebFullscreenVideoStatus::kNotEffectivelyFullscreen);
web_contents_impl()->MediaEffectivelyFullscreenChanged(is_fullscreen);
}
void MediaWebContentsObserver::OnMediaPlaying() {
has_played_before_ = true;
}
void MediaWebContentsObserver::OnAudioOutputSinkChangedWithRawDeviceId(
const MediaPlayerId& player_id,
const std::string& raw_device_id) {
session_controllers_manager_->OnAudioOutputSinkChanged(player_id,
raw_device_id);
}
void MediaWebContentsObserver::OnRemotePlaybackMetadataChange(
const MediaPlayerId& player_id,
media_session::mojom::RemotePlaybackMetadataPtr remote_playback_metadata) {
session_controllers_manager_->OnRemotePlaybackMetadataChange(
player_id, std::move(remote_playback_metadata));
}
void MediaWebContentsObserver::MediaPlayerObserverHostImpl::
OnVideoVisibilityChanged(bool meets_visibility_threshold) {
media_web_contents_observer_->session_controllers_manager()
->OnVideoVisibilityChanged(media_player_id_, meets_visibility_threshold);
}
bool MediaWebContentsObserver::IsMediaPlayerRemoteAvailable(
const MediaPlayerId& player_id) {
return media_player_remotes_.contains(player_id);
}
mojo::AssociatedRemote<media::mojom::MediaPlayer>&
MediaWebContentsObserver::GetMediaPlayerRemote(const MediaPlayerId& player_id) {
return media_player_remotes_.at(player_id);
}
void MediaWebContentsObserver::OnMediaPlayerObserverDisconnected(
const MediaPlayerId& player_id) {
DCHECK(media_player_observer_hosts_.contains(player_id));
media_player_observer_hosts_.erase(player_id);
}
device::mojom::WakeLock* MediaWebContentsObserver::GetAudioWakeLock() {
// Here is a lazy binding, and will not reconnect after connection error.
if (!audio_wake_lock_) {
mojo::PendingReceiver<device::mojom::WakeLock> receiver =
audio_wake_lock_.BindNewPipeAndPassReceiver();
device::mojom::WakeLockContext* wake_lock_context =
web_contents()->GetWakeLockContext();
if (wake_lock_context) {
wake_lock_context->GetWakeLock(
device::mojom::WakeLockType::kPreventAppSuspension,
device::mojom::WakeLockReason::kAudioPlayback, "Playing audio",
std::move(receiver));
}
}
return audio_wake_lock_.get();
}
void MediaWebContentsObserver::LockAudio() {
GetAudioWakeLock()->RequestWakeLock();
has_audio_wake_lock_for_testing_ = true;
}
void MediaWebContentsObserver::CancelAudioLock() {
if (audio_wake_lock_)
GetAudioWakeLock()->CancelWakeLock();
has_audio_wake_lock_for_testing_ = false;
}
WebContentsImpl* MediaWebContentsObserver::web_contents_impl() const {
return static_cast<WebContentsImpl*>(web_contents());
}
void MediaWebContentsObserver::BindMediaPlayerHost(
GlobalRenderFrameHostId frame_routing_id,
mojo::PendingAssociatedReceiver<media::mojom::MediaPlayerHost>
player_receiver) {
auto it = media_player_hosts_.find(frame_routing_id);
if (it == media_player_hosts_.end()) {
it = media_player_hosts_
.try_emplace(
frame_routing_id,
std::make_unique<MediaPlayerHostImpl>(frame_routing_id, this))
.first;
}
it->second->AddMediaPlayerHostReceiver(std::move(player_receiver));
}
void MediaWebContentsObserver::OnMediaPlayerAdded(
mojo::PendingAssociatedRemote<media::mojom::MediaPlayer> player_remote,
mojo::PendingAssociatedReceiver<media::mojom::MediaPlayerObserver>
media_player_observer,
MediaPlayerId player_id) {
if (!RenderFrameHost::FromID(player_id.frame_routing_id) ||
media_player_remotes_.contains(player_id) ||
media_player_observer_hosts_.contains(player_id)) {
// If you see this, it's likely due to https://crbug.com/1392441
mojo::ReportBadMessage("Bad MediaPlayer request.");
return;
}
auto remote_it = media_player_remotes_.try_emplace(player_id);
remote_it.first->second.Bind(std::move(player_remote));
remote_it.first->second.set_disconnect_handler(base::BindOnce(
[](MediaWebContentsObserver* observer, const MediaPlayerId& player_id) {
// This cannot just use `erase()`, because some observers call back
// into `this` and query player info when a PlayerInfo is destroyed
// (!!). Re-entering a container while erasing an entry is generally
// not very safe or robust.
if (auto it = observer->player_info_map_.find(player_id);
it != observer->player_info_map_.end()) {
// Instead, remove entries in a multi-step process:
// 1. Move ownership of the PlayerInfo out of the map.
// 2. Erase the entry from the map.
// 3. Destroy the PlayerInfo (by letting it go out of scope).
// Because the entry is already gone from the map, GetPlayerInfo()
// will return null instead of trying to compare keys that are
// potentially destroyed.
auto player_info = std::move(it->second);
observer->player_info_map_.erase(it);
}
observer->media_player_remotes_.erase(player_id);
observer->session_controllers_manager_->OnEnd(player_id);
if (observer->fullscreen_player_ &&
*observer->fullscreen_player_ == player_id) {
observer->fullscreen_player_.reset();
}
observer->web_contents_impl()->MediaDestroyed(player_id);
},
base::Unretained(this), player_id));
auto observer_it = media_player_observer_hosts_.try_emplace(
player_id,
std::make_unique<MediaPlayerObserverHostImpl>(player_id, this));
observer_it.first->second->BindMediaPlayerObserverReceiver(
std::move(media_player_observer));
}
void MediaWebContentsObserver::SuspendAllMediaPlayers() {
for (auto& media_player_remote : media_player_remotes_) {
media_player_remote.second->SuspendForFrameClosed();
}
}
void MediaWebContentsObserver::OnExperimentStateChanged(MediaPlayerId id,
bool is_starting) {
use_after_free_checker_.check();
GetMediaPlayerRemote(id)->SetPowerExperimentState(is_starting);
}
base::WeakPtr<MediaWebContentsObserver>
MediaWebContentsObserver::GetWeakPtrForFrame(
RenderFrameHost* render_frame_host) {
auto iter = per_frame_factory_.find(render_frame_host);
if (iter != per_frame_factory_.end())
return iter->second->GetWeakPtr();
auto result = per_frame_factory_.emplace(std::make_pair(
render_frame_host,
std::make_unique<base::WeakPtrFactory<MediaWebContentsObserver>>(this)));
return result.first->second->GetWeakPtr();
}
} // namespace content