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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 "MediaPlaybackStatus.h"
#include "MediaControlUtils.h"
namespace mozilla::dom {
#undef LOG
#define LOG(msg, ...) \
MOZ_LOG(gMediaControlLog, LogLevel::Debug, \
("MediaPlaybackStatus=%p, " msg, this, ##__VA_ARGS__))
void MediaPlaybackStatus::UpdateMediaPlaybackState(uint64_t aContextId,
MediaPlaybackState aState) {
LOG("Update playback state '%s' for context %" PRIu64,
ToMediaPlaybackStateStr(aState), aContextId);
MOZ_ASSERT(NS_IsMainThread());
ContextMediaInfo& info = GetNotNullContextInfo(aContextId);
if (aState == MediaPlaybackState::eStarted) {
info.IncreaseControlledMediaNum();
} else if (aState == MediaPlaybackState::eStopped) {
info.DecreaseControlledMediaNum();
} else if (aState == MediaPlaybackState::ePlayed) {
info.IncreasePlayingMediaNum();
} else {
MOZ_ASSERT(aState == MediaPlaybackState::ePaused);
info.DecreasePlayingMediaNum();
}
// The context still has controlled media, we should keep its alive.
if (info.IsAnyMediaBeingControlled()) {
return;
}
MOZ_ASSERT(!info.IsPlaying());
MOZ_ASSERT(!info.IsAudible());
// DO NOT access `info` after this line.
DestroyContextInfo(aContextId);
}
void MediaPlaybackStatus::DestroyContextInfo(uint64_t aContextId) {
MOZ_ASSERT(NS_IsMainThread());
LOG("Remove context %" PRIu64, aContextId);
mContextInfoMap.Remove(aContextId);
// If the removed context is owning the audio focus, we would find another
// context to take the audio focus if it's possible.
if (IsContextOwningAudioFocus(aContextId)) {
ChooseNewContextToOwnAudioFocus();
}
}
void MediaPlaybackStatus::UpdateMediaAudibleState(uint64_t aContextId,
MediaAudibleState aState) {
LOG("Update audible state '%s' for context %" PRIu64,
ToMediaAudibleStateStr(aState), aContextId);
MOZ_ASSERT(NS_IsMainThread());
ContextMediaInfo& info = GetNotNullContextInfo(aContextId);
if (aState == MediaAudibleState::eAudible) {
info.IncreaseAudibleMediaNum();
} else {
MOZ_ASSERT(aState == MediaAudibleState::eInaudible);
info.DecreaseAudibleMediaNum();
}
if (ShouldRequestAudioFocusForInfo(info)) {
SetOwningAudioFocusContextId(Some(aContextId));
} else if (ShouldAbandonAudioFocusForInfo(info)) {
ChooseNewContextToOwnAudioFocus();
}
}
bool MediaPlaybackStatus::IsPlaying() const {
MOZ_ASSERT(NS_IsMainThread());
return std::any_of(mContextInfoMap.Values().cbegin(),
mContextInfoMap.Values().cend(),
[](const auto& info) { return info->IsPlaying(); });
}
bool MediaPlaybackStatus::IsAudible() const {
MOZ_ASSERT(NS_IsMainThread());
return std::any_of(mContextInfoMap.Values().cbegin(),
mContextInfoMap.Values().cend(),
[](const auto& info) { return info->IsAudible(); });
}
bool MediaPlaybackStatus::IsAnyMediaBeingControlled() const {
MOZ_ASSERT(NS_IsMainThread());
return std::any_of(
mContextInfoMap.Values().cbegin(), mContextInfoMap.Values().cend(),
[](const auto& info) { return info->IsAnyMediaBeingControlled(); });
}
MediaPlaybackStatus::ContextMediaInfo&
MediaPlaybackStatus::GetNotNullContextInfo(uint64_t aContextId) {
MOZ_ASSERT(NS_IsMainThread());
return *mContextInfoMap.GetOrInsertNew(aContextId, aContextId);
}
Maybe<uint64_t> MediaPlaybackStatus::GetAudioFocusOwnerContextId() const {
return mOwningAudioFocusContextId;
}
void MediaPlaybackStatus::ChooseNewContextToOwnAudioFocus() {
for (const auto& info : mContextInfoMap.Values()) {
if (info->IsAudible()) {
SetOwningAudioFocusContextId(Some(info->Id()));
return;
}
}
// No context is audible, so no one should the own audio focus.
SetOwningAudioFocusContextId(Nothing());
}
void MediaPlaybackStatus::SetOwningAudioFocusContextId(
Maybe<uint64_t>&& aContextId) {
if (mOwningAudioFocusContextId == aContextId) {
return;
}
mOwningAudioFocusContextId = aContextId;
}
bool MediaPlaybackStatus::ShouldRequestAudioFocusForInfo(
const ContextMediaInfo& aInfo) const {
return aInfo.IsAudible() && !IsContextOwningAudioFocus(aInfo.Id());
}
bool MediaPlaybackStatus::ShouldAbandonAudioFocusForInfo(
const ContextMediaInfo& aInfo) const {
// The owner becomes inaudible and there is other context still playing, so we
// should switch the audio focus to the audible context.
return !aInfo.IsAudible() && IsContextOwningAudioFocus(aInfo.Id()) &&
IsAudible();
}
bool MediaPlaybackStatus::IsContextOwningAudioFocus(uint64_t aContextId) const {
return mOwningAudioFocusContextId ? *mOwningAudioFocusContextId == aContextId
: false;
}
} // namespace mozilla::dom
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