| /* |
| * Copyright 2019 The WebRTC Project Authors. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "call/adaptation/resource.h" |
| |
| #include "absl/algorithm/container.h" |
| #include "rtc_base/checks.h" |
| |
| namespace webrtc { |
| |
| ResourceListener::~ResourceListener() {} |
| |
| Resource::Resource() : usage_state_(ResourceUsageState::kStable) {} |
| |
| Resource::~Resource() { |
| RTC_DCHECK(listeners_.empty()); |
| } |
| |
| void Resource::RegisterListener(ResourceListener* listener) { |
| RTC_DCHECK(listener); |
| RTC_DCHECK(absl::c_find(listeners_, listener) == listeners_.end()) |
| << "ResourceListener was added twice."; |
| listeners_.push_back(listener); |
| } |
| |
| void Resource::UnregisterListener(ResourceListener* listener) { |
| RTC_DCHECK(listener); |
| auto it = absl::c_find(listeners_, listener); |
| if (it != listeners_.end()) |
| listeners_.erase(it); |
| } |
| |
| ResourceUsageState Resource::usage_state() const { |
| return usage_state_; |
| } |
| |
| ResourceListenerResponse Resource::OnResourceUsageStateMeasured( |
| ResourceUsageState usage_state) { |
| ResourceListenerResponse response = ResourceListenerResponse::kNothing; |
| usage_state_ = usage_state; |
| for (auto* listener : listeners_) { |
| ResourceListenerResponse listener_response = |
| listener->OnResourceUsageStateMeasured(*this); |
| if (listener_response != ResourceListenerResponse::kNothing) |
| response = listener_response; |
| } |
| return response; |
| } |
| |
| } // namespace webrtc |