зеркало из https://github.com/mozilla/gecko-dev.git
135 строки
4.7 KiB
C++
135 строки
4.7 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "AudioFocusManager.h"
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#include "MediaController.h"
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#include "MediaControlUtils.h"
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#include "MediaControlService.h"
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#include "mozilla/dom/CanonicalBrowsingContext.h"
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#include "mozilla/Logging.h"
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#include "mozilla/StaticPrefs_media.h"
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#include "mozilla/Telemetry.h"
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#include "nsThreadUtils.h"
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#undef LOG
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#define LOG(msg, ...) \
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MOZ_LOG(gMediaControlLog, LogLevel::Debug, \
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("AudioFocusManager=%p, " msg, this, ##__VA_ARGS__))
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namespace mozilla::dom {
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void AudioFocusManager::RequestAudioFocus(IMediaController* aController) {
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MOZ_ASSERT(aController);
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if (mOwningFocusControllers.Contains(aController)) {
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return;
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}
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const bool hasManagedAudioFocus = ClearFocusControllersIfNeeded();
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LOG("Controller %" PRId64 " grants audio focus", aController->Id());
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mOwningFocusControllers.AppendElement(aController);
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if (hasManagedAudioFocus) {
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AccumulateCategorical(
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mozilla::Telemetry::LABELS_TABS_AUDIO_COMPETITION::ManagedFocusByGecko);
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} else if (GetAudioFocusNums() == 1) {
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// Only one audible tab is playing within gecko.
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AccumulateCategorical(
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mozilla::Telemetry::LABELS_TABS_AUDIO_COMPETITION::None);
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} else {
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// Multiple audible tabs are playing at the same time within gecko.
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CreateTimerForUpdatingTelemetry();
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}
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}
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void AudioFocusManager::RevokeAudioFocus(IMediaController* aController) {
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MOZ_ASSERT(aController);
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if (!mOwningFocusControllers.Contains(aController)) {
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return;
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}
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LOG("Controller %" PRId64 " loses audio focus", aController->Id());
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mOwningFocusControllers.RemoveElement(aController);
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}
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bool AudioFocusManager::ClearFocusControllersIfNeeded() {
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// Enable audio focus management will start the audio competition which is
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// only allowing one controller playing at a time.
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if (!StaticPrefs::media_audioFocus_management()) {
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return false;
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}
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bool hasStoppedAnyController = false;
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for (auto& controller : mOwningFocusControllers) {
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LOG("Controller %" PRId64 " loses audio focus in audio competitition",
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controller->Id());
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hasStoppedAnyController = true;
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controller->Stop();
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}
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mOwningFocusControllers.Clear();
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return hasStoppedAnyController;
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}
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uint32_t AudioFocusManager::GetAudioFocusNums() const {
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return mOwningFocusControllers.Length();
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}
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void AudioFocusManager::CreateTimerForUpdatingTelemetry() {
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MOZ_ASSERT(NS_IsMainThread());
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// Already create the timer.
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if (mTelemetryTimer) {
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return;
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}
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const uint32_t focusNum = GetAudioFocusNums();
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MOZ_ASSERT(focusNum > 1);
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RefPtr<MediaControlService> service = MediaControlService::GetService();
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MOZ_ASSERT(service);
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const uint32_t activeControllerNum = service->GetActiveControllersNum();
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// It takes time if users want to manually manage the audio competition by
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// pausing one of playing tabs. So we will check the status after a short
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// while to see if users handle the audio competition, or simply ignore it.
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nsCOMPtr<nsIRunnable> task = NS_NewRunnableFunction(
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"AudioFocusManager::RequestAudioFocus",
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[focusNum, activeControllerNum]() {
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if (RefPtr<MediaControlService> service =
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MediaControlService::GetService()) {
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service->GetAudioFocusManager().UpdateTelemetryDataFromTimer(
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focusNum, activeControllerNum);
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}
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});
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mTelemetryTimer =
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SimpleTimer::Create(task, 4000, GetMainThreadSerialEventTarget());
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}
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void AudioFocusManager::UpdateTelemetryDataFromTimer(
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uint32_t aPrevFocusNum, uint64_t aPrevActiveControllerNum) {
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MOZ_ASSERT(NS_IsMainThread());
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MOZ_ASSERT(mTelemetryTimer);
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// Users pause or mute tabs which decreases the amount of audible playing
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// tabs, which should not affect the total controller amount.
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if (GetAudioFocusNums() < aPrevFocusNum) {
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// If active controller amount is not equal, that means controllers got
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// deactivated by other reasons, such as reaching to the end, which are not
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// the situation we would like to accumulate for telemetry.
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if (MediaControlService::GetService()->GetActiveControllersNum() ==
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aPrevActiveControllerNum) {
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AccumulateCategorical(mozilla::Telemetry::LABELS_TABS_AUDIO_COMPETITION::
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ManagedFocusByUser);
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}
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} else {
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AccumulateCategorical(
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mozilla::Telemetry::LABELS_TABS_AUDIO_COMPETITION::Ignored);
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}
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mTelemetryTimer = nullptr;
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}
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AudioFocusManager::~AudioFocusManager() {
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if (mTelemetryTimer) {
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mTelemetryTimer->Cancel();
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mTelemetryTimer = nullptr;
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}
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}
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} // namespace mozilla::dom
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