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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/media_router/common/discovery/media_sink_service_base.h"
#include <vector>
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/observer_list.h"
#include "components/media_router/common/media_route.h"
namespace {
// Timeout amount for |discovery_timer_|.
const constexpr base::TimeDelta kDiscoveryTimeout = base::Seconds(3);
} // namespace
namespace media_router {
MediaSinkServiceBase::MediaSinkServiceBase(
const OnSinksDiscoveredCallback& callback)
: discovery_timer_(std::make_unique<base::OneShotTimer>()),
on_sinks_discovered_cb_(callback) {
DETACH_FROM_SEQUENCE(sequence_checker_);
}
MediaSinkServiceBase::~MediaSinkServiceBase() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
void MediaSinkServiceBase::AddObserver(Observer* observer) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
observers_.AddObserver(observer);
}
void MediaSinkServiceBase::RemoveObserver(Observer* observer) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
observers_.RemoveObserver(observer);
}
const base::flat_map<MediaSink::Id, MediaSinkInternal>&
MediaSinkServiceBase::GetSinks() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return sinks_;
}
const MediaSinkInternal* MediaSinkServiceBase::GetSinkById(
const MediaSink::Id& sink_id) const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
auto it = sinks_.find(sink_id);
return it != sinks_.end() ? &it->second : nullptr;
}
const MediaSinkInternal* MediaSinkServiceBase::GetSinkByRoute(
const MediaRoute& route) const {
return GetSinkById(route.media_sink_id());
}
void MediaSinkServiceBase::AddOrUpdateSink(const MediaSinkInternal& sink) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
sinks_.insert_or_assign(sink.sink().id(), sink);
for (auto& observer : observers_) {
observer.OnSinkAddedOrUpdated(sink);
}
StartTimer();
}
void MediaSinkServiceBase::RemoveSink(const MediaSinkInternal& sink) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
RemoveSinkById(sink.sink().id());
}
void MediaSinkServiceBase::RemoveSinkById(const MediaSink::Id& sink_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
auto it = sinks_.find(sink_id);
if (it == sinks_.end()) {
return;
}
MediaSinkInternal sink = std::move(it->second);
sinks_.erase(it);
for (auto& observer : observers_) {
observer.OnSinkRemoved(sink);
}
StartTimer();
}
void MediaSinkServiceBase::SetTimerForTest(
std::unique_ptr<base::OneShotTimer> timer) {
discovery_timer_ = std::move(timer);
}
void MediaSinkServiceBase::AddSinkForTest(const MediaSinkInternal& sink) {
sinks_.insert_or_assign(sink.sink().id(), sink);
}
void MediaSinkServiceBase::StartTimer() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (discovery_timer_->IsRunning()) {
return;
}
discovery_timer_->Start(
FROM_HERE, kDiscoveryTimeout,
base::BindOnce(&MediaSinkServiceBase::OnDiscoveryComplete,
base::Unretained(this)));
}
void MediaSinkServiceBase::OnDiscoveryComplete() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
discovery_timer_->Stop();
RecordDeviceCounts();
// Only send discovered sinks back to MediaRouter if the list changed.
if (sinks_ == previous_sinks_) {
DVLOG(2) << "No update to sink list.";
return;
}
DVLOG(2) << "Send sinks to media router, [size]: " << sinks_.size();
std::vector<MediaSinkInternal> sinks;
for (const auto& sink_it : sinks_) {
sinks.push_back(sink_it.second);
}
for (auto& observer : observers_) {
observer.OnSinksDiscovered(sinks);
}
on_sinks_discovered_cb_.Run(std::move(sinks));
previous_sinks_ = sinks_;
}
} // namespace media_router
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