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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "ContentMediaController.h"
#include "MediaControlUtils.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/dom/BrowsingContext.h"
#include "mozilla/dom/CanonicalBrowsingContext.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/Telemetry.h"
#include "nsGlobalWindowOuter.h"
namespace mozilla::dom {
#undef LOG
#define LOG(msg, ...) \
MOZ_LOG(gMediaControlLog, LogLevel::Debug, \
("ContentMediaController=%p, " msg, this, ##__VA_ARGS__))
static Maybe<bool> sXPCOMShutdown;
static void InitXPCOMShutdownMonitor() {
if (sXPCOMShutdown) {
return;
}
sXPCOMShutdown.emplace(false);
RunOnShutdown([&] { sXPCOMShutdown = Some(true); });
}
static ContentMediaController* GetContentMediaControllerFromBrowsingContext(
BrowsingContext* aBrowsingContext) {
MOZ_ASSERT(NS_IsMainThread());
InitXPCOMShutdownMonitor();
if (!aBrowsingContext || aBrowsingContext->IsDiscarded()) {
return nullptr;
}
nsPIDOMWindowOuter* outer = aBrowsingContext->GetDOMWindow();
if (!outer) {
return nullptr;
}
nsGlobalWindowInner* inner =
nsGlobalWindowInner::Cast(outer->GetCurrentInnerWindow());
return inner ? inner->GetContentMediaController() : nullptr;
}
static already_AddRefed<BrowsingContext> GetBrowsingContextForAgent(
uint64_t aBrowsingContextId) {
// If XPCOM has been shutdown, then we're not able to access browsing context.
if (sXPCOMShutdown && *sXPCOMShutdown) {
return nullptr;
}
return BrowsingContext::Get(aBrowsingContextId);
}
/* static */
ContentMediaControlKeyReceiver* ContentMediaControlKeyReceiver::Get(
BrowsingContext* aBC) {
MOZ_ASSERT(NS_IsMainThread());
return GetContentMediaControllerFromBrowsingContext(aBC);
}
/* static */
ContentMediaAgent* ContentMediaAgent::Get(BrowsingContext* aBC) {
MOZ_ASSERT(NS_IsMainThread());
return GetContentMediaControllerFromBrowsingContext(aBC);
}
void ContentMediaAgent::NotifyMediaPlaybackChanged(uint64_t aBrowsingContextId,
MediaPlaybackState aState) {
MOZ_ASSERT(NS_IsMainThread());
RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
if (!bc || bc->IsDiscarded()) {
return;
}
LOG("Notify media %s in BC %" PRId64, ToMediaPlaybackStateStr(aState),
bc->Id());
if (XRE_IsContentProcess()) {
ContentChild* contentChild = ContentChild::GetSingleton();
Unused << contentChild->SendNotifyMediaPlaybackChanged(bc, aState);
} else {
// Currently this only happen when we disable e10s, otherwise all controlled
// media would be run in the content process.
if (RefPtr<IMediaInfoUpdater> updater =
bc->Canonical()->GetMediaController()) {
updater->NotifyMediaPlaybackChanged(bc->Id(), aState);
}
}
}
void ContentMediaAgent::NotifyMediaAudibleChanged(uint64_t aBrowsingContextId,
MediaAudibleState aState) {
MOZ_ASSERT(NS_IsMainThread());
RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
if (!bc || bc->IsDiscarded()) {
return;
}
LOG("Notify media became %s in BC %" PRId64,
aState == MediaAudibleState::eAudible ? "audible" : "inaudible",
bc->Id());
if (XRE_IsContentProcess()) {
ContentChild* contentChild = ContentChild::GetSingleton();
Unused << contentChild->SendNotifyMediaAudibleChanged(bc, aState);
} else {
// Currently this only happen when we disable e10s, otherwise all controlled
// media would be run in the content process.
if (RefPtr<IMediaInfoUpdater> updater =
bc->Canonical()->GetMediaController()) {
updater->NotifyMediaAudibleChanged(bc->Id(), aState);
}
}
}
void ContentMediaAgent::SetIsInPictureInPictureMode(
uint64_t aBrowsingContextId, bool aIsInPictureInPictureMode) {
MOZ_ASSERT(NS_IsMainThread());
RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
if (!bc || bc->IsDiscarded()) {
return;
}
LOG("Notify media Picture-in-Picture mode '%s' in BC %" PRId64,
aIsInPictureInPictureMode ? "enabled" : "disabled", bc->Id());
if (XRE_IsContentProcess()) {
ContentChild* contentChild = ContentChild::GetSingleton();
Unused << contentChild->SendNotifyPictureInPictureModeChanged(
bc, aIsInPictureInPictureMode);
} else {
// Currently this only happen when we disable e10s, otherwise all controlled
// media would be run in the content process.
if (RefPtr<IMediaInfoUpdater> updater =
bc->Canonical()->GetMediaController()) {
updater->SetIsInPictureInPictureMode(bc->Id(), aIsInPictureInPictureMode);
}
}
}
void ContentMediaAgent::SetDeclaredPlaybackState(
uint64_t aBrowsingContextId, MediaSessionPlaybackState aState) {
RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
if (!bc || bc->IsDiscarded()) {
return;
}
LOG("Notify declared playback state '%s' in BC %" PRId64,
ToMediaSessionPlaybackStateStr(aState), bc->Id());
if (XRE_IsContentProcess()) {
ContentChild* contentChild = ContentChild::GetSingleton();
Unused << contentChild->SendNotifyMediaSessionPlaybackStateChanged(bc,
aState);
return;
}
// This would only happen when we disable e10s.
if (RefPtr<IMediaInfoUpdater> updater =
bc->Canonical()->GetMediaController()) {
updater->SetDeclaredPlaybackState(bc->Id(), aState);
}
}
void ContentMediaAgent::NotifySessionCreated(uint64_t aBrowsingContextId) {
RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
if (!bc || bc->IsDiscarded()) {
return;
}
LOG("Notify media session being created in BC %" PRId64, bc->Id());
if (XRE_IsContentProcess()) {
ContentChild* contentChild = ContentChild::GetSingleton();
Unused << contentChild->SendNotifyMediaSessionUpdated(bc, true);
return;
}
// This would only happen when we disable e10s.
if (RefPtr<IMediaInfoUpdater> updater =
bc->Canonical()->GetMediaController()) {
updater->NotifySessionCreated(bc->Id());
}
}
void ContentMediaAgent::NotifySessionDestroyed(uint64_t aBrowsingContextId) {
RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
if (!bc || bc->IsDiscarded()) {
return;
}
LOG("Notify media session being destroyed in BC %" PRId64, bc->Id());
if (XRE_IsContentProcess()) {
ContentChild* contentChild = ContentChild::GetSingleton();
Unused << contentChild->SendNotifyMediaSessionUpdated(bc, false);
return;
}
// This would only happen when we disable e10s.
if (RefPtr<IMediaInfoUpdater> updater =
bc->Canonical()->GetMediaController()) {
updater->NotifySessionDestroyed(bc->Id());
}
}
void ContentMediaAgent::UpdateMetadata(
uint64_t aBrowsingContextId, const Maybe<MediaMetadataBase>& aMetadata) {
RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
if (!bc || bc->IsDiscarded()) {
return;
}
LOG("Notify media session metadata change in BC %" PRId64, bc->Id());
if (XRE_IsContentProcess()) {
ContentChild* contentChild = ContentChild::GetSingleton();
Unused << contentChild->SendNotifyUpdateMediaMetadata(bc, aMetadata);
return;
}
// This would only happen when we disable e10s.
if (RefPtr<IMediaInfoUpdater> updater =
bc->Canonical()->GetMediaController()) {
updater->UpdateMetadata(bc->Id(), aMetadata);
}
}
void ContentMediaAgent::EnableAction(uint64_t aBrowsingContextId,
MediaSessionAction aAction) {
RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
if (!bc || bc->IsDiscarded()) {
return;
}
LOG("Notify to enable action '%s' in BC %" PRId64,
ToMediaSessionActionStr(aAction), bc->Id());
if (XRE_IsContentProcess()) {
ContentChild* contentChild = ContentChild::GetSingleton();
Unused << contentChild->SendNotifyMediaSessionSupportedActionChanged(
bc, aAction, true);
return;
}
// This would only happen when we disable e10s.
if (RefPtr<IMediaInfoUpdater> updater =
bc->Canonical()->GetMediaController()) {
updater->EnableAction(bc->Id(), aAction);
}
}
void ContentMediaAgent::DisableAction(uint64_t aBrowsingContextId,
MediaSessionAction aAction) {
RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
if (!bc || bc->IsDiscarded()) {
return;
}
LOG("Notify to disable action '%s' in BC %" PRId64,
ToMediaSessionActionStr(aAction), bc->Id());
if (XRE_IsContentProcess()) {
ContentChild* contentChild = ContentChild::GetSingleton();
Unused << contentChild->SendNotifyMediaSessionSupportedActionChanged(
bc, aAction, false);
return;
}
// This would only happen when we disable e10s.
if (RefPtr<IMediaInfoUpdater> updater =
bc->Canonical()->GetMediaController()) {
updater->DisableAction(bc->Id(), aAction);
}
}
void ContentMediaAgent::NotifyMediaFullScreenState(uint64_t aBrowsingContextId,
bool aIsInFullScreen) {
RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
if (!bc || bc->IsDiscarded()) {
return;
}
LOG("Notify %s fullscreen in BC %" PRId64,
aIsInFullScreen ? "entered" : "left", bc->Id());
if (XRE_IsContentProcess()) {
ContentChild* contentChild = ContentChild::GetSingleton();
Unused << contentChild->SendNotifyMediaFullScreenState(bc, aIsInFullScreen);
return;
}
// This would only happen when we disable e10s.
if (RefPtr<IMediaInfoUpdater> updater =
bc->Canonical()->GetMediaController()) {
updater->NotifyMediaFullScreenState(bc->Id(), aIsInFullScreen);
}
}
void ContentMediaAgent::UpdatePositionState(uint64_t aBrowsingContextId,
const PositionState& aState) {
RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
if (!bc || bc->IsDiscarded()) {
return;
}
if (XRE_IsContentProcess()) {
ContentChild* contentChild = ContentChild::GetSingleton();
Unused << contentChild->SendNotifyPositionStateChanged(bc, aState);
return;
}
// This would only happen when we disable e10s.
if (RefPtr<IMediaInfoUpdater> updater =
bc->Canonical()->GetMediaController()) {
updater->UpdatePositionState(bc->Id(), aState);
}
}
ContentMediaController::ContentMediaController(uint64_t aId) {
LOG("Create content media controller for BC %" PRId64, aId);
}
void ContentMediaController::AddReceiver(
ContentMediaControlKeyReceiver* aListener) {
MOZ_ASSERT(NS_IsMainThread());
mReceivers.AppendElement(aListener);
}
void ContentMediaController::RemoveReceiver(
ContentMediaControlKeyReceiver* aListener) {
MOZ_ASSERT(NS_IsMainThread());
mReceivers.RemoveElement(aListener);
}
void ContentMediaController::HandleMediaKey(MediaControlKey aKey) {
MOZ_ASSERT(NS_IsMainThread());
if (mReceivers.IsEmpty()) {
return;
}
LOG("Handle '%s' event, receiver num=%zu", ToMediaControlKeyStr(aKey),
mReceivers.Length());
// We have default handlers for play, pause and stop.
switch (aKey) {
case MediaControlKey::Pause:
PauseOrStopMedia();
return;
case MediaControlKey::Play:
[[fallthrough]];
case MediaControlKey::Stop:
// When receiving `Stop`, the amount of receiver would vary during the
// iteration, so we use the backward iteration to avoid accessing the
// index which is over the array length.
for (auto& receiver : Reversed(mReceivers)) {
receiver->HandleMediaKey(aKey);
}
return;
default:
MOZ_ASSERT_UNREACHABLE("Not supported media key for default handler");
}
}
void ContentMediaController::PauseOrStopMedia() {
// When receiving `pause`, if a page contains playing media and paused media
// at that moment, that means a user intends to pause those playing
// media, not the already paused ones. Then, we're going to stop those already
// paused media and keep those latest paused media in `mReceivers`.
// The reason for doing that is, when resuming paused media, we only want to
// resume latest paused media, not all media, in order to get a better user
// experience, which matches Chrome's behavior.
bool isAnyMediaPlaying = false;
for (const auto& receiver : mReceivers) {
if (receiver->IsPlaying()) {
isAnyMediaPlaying = true;
break;
}
}
for (auto& receiver : Reversed(mReceivers)) {
if (isAnyMediaPlaying && !receiver->IsPlaying()) {
receiver->HandleMediaKey(MediaControlKey::Stop);
} else {
receiver->HandleMediaKey(MediaControlKey::Pause);
}
}
}
} // namespace mozilla::dom