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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/browser/api/offscreen/audio_lifetime_enforcer.h"
#include "base/auto_reset.h"
#include "base/task/single_thread_task_runner.h"
#include "base/task/task_runner.h"
#include "extensions/browser/offscreen_document_host.h"
namespace extensions {
namespace {
// The amount of time for a document to be considered inactive when not playing
// audio.
base::TimeDelta g_audio_timeout = base::Seconds(30);
} // namespace
AudioLifetimeEnforcer::AudioLifetimeEnforcer(
OffscreenDocumentHost* offscreen_document,
TerminationCallback termination_callback,
NotifyInactiveCallback notify_inactive_callback)
: OffscreenDocumentLifetimeEnforcer(offscreen_document,
std::move(termination_callback),
std::move(notify_inactive_callback)),
content::WebContentsObserver(offscreen_document->host_contents()) {
// Immediately post a timeout; this allows the extension some time to load the
// audio resource as it first loads, but marks it as inactive if it doesn't
// play audio after a certain amount of time.
PostTimeoutTask();
}
AudioLifetimeEnforcer::~AudioLifetimeEnforcer() = default;
// static
base::AutoReset<base::TimeDelta> AudioLifetimeEnforcer::SetTimeoutForTesting(
base::TimeDelta timeout) {
return base::AutoReset<base::TimeDelta>(&g_audio_timeout, timeout);
}
bool AudioLifetimeEnforcer::IsActive() {
return was_recently_active_;
}
void AudioLifetimeEnforcer::OnAudioStateChanged(bool audible) {
if (audible) {
// Invalidate any pending timeouts.
weak_factory_.InvalidateWeakPtrs();
was_recently_active_ = true;
return;
}
PostTimeoutTask();
}
void AudioLifetimeEnforcer::PostTimeoutTask() {
base::SingleThreadTaskRunner::GetCurrentDefault()->PostDelayedTask(
FROM_HERE,
base::BindOnce(&AudioLifetimeEnforcer::OnAudioTimeout,
weak_factory_.GetWeakPtr()),
g_audio_timeout);
}
void AudioLifetimeEnforcer::OnAudioTimeout() {
was_recently_active_ = false;
NotifyInactive();
}
} // namespace extensions
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