cef/libcef/browser/media_stream_registrar.cc

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// Copyright 2022 The Chromium Embedded Framework Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "libcef/browser/media_stream_registrar.h"
#include "libcef/browser/browser_host_base.h"
#include "libcef/browser/thread_util.h"
class CefMediaStreamUI : public content::MediaStreamUI {
public:
CefMediaStreamUI(base::WeakPtr<CefMediaStreamRegistrar> registrar,
bool has_video,
bool has_audio)
: registrar_(registrar), has_video_(has_video), has_audio_(has_audio) {}
~CefMediaStreamUI() override {
if (registrar_) {
registrar_->UnregisterMediaStream(label_);
}
}
CefMediaStreamUI(const CefMediaStreamUI&) = delete;
CefMediaStreamUI& operator=(const CefMediaStreamUI&) = delete;
gfx::NativeViewId OnStarted(
base::RepeatingClosure stop,
SourceCallback source,
const std::string& label,
std::vector<content::DesktopMediaID> screen_capture_ids,
StateChangeCallback state_change) override {
if (registrar_) {
label_ = label;
registrar_->RegisterMediaStream(label, has_video_, has_audio_);
}
return 0;
}
void OnDeviceStoppedForSourceChange(
const std::string& label,
const content::DesktopMediaID& old_media_id,
const content::DesktopMediaID& new_media_id) override {}
void OnDeviceStopped(const std::string& label,
const content::DesktopMediaID& media_id) override {}
private:
base::WeakPtr<CefMediaStreamRegistrar> registrar_;
const bool has_video_;
const bool has_audio_;
std::string label_;
};
CefMediaStreamRegistrar::CefMediaStreamRegistrar(CefBrowserHostBase* browser)
: browser_(browser) {}
std::unique_ptr<content::MediaStreamUI>
CefMediaStreamRegistrar::MaybeCreateMediaStreamUI(bool has_video,
bool has_audio) const {
// Only create the object if the callback will be executed.
if (auto client = browser_->GetClient()) {
if (auto handler = client->GetDisplayHandler()) {
return std::make_unique<CefMediaStreamUI>(weak_ptr_factory_.GetWeakPtr(),
has_video, has_audio);
}
}
return nullptr;
}
void CefMediaStreamRegistrar::RegisterMediaStream(const std::string& label,
bool video,
bool audio) {
CEF_REQUIRE_UIT();
MediaStreamInfo info = {video, audio};
registered_streams_.insert(std::make_pair(label, info));
NotifyMediaStreamChange();
}
void CefMediaStreamRegistrar::UnregisterMediaStream(const std::string& label) {
CEF_REQUIRE_UIT();
registered_streams_.erase(label);
NotifyMediaStreamChange();
}
void CefMediaStreamRegistrar::NotifyMediaStreamChange() {
bool video = false;
bool audio = false;
for (const auto& media_stream : registered_streams_) {
const auto& info = media_stream.second;
if (!video)
video = info.video;
if (!audio)
audio = info.audio;
}
if (audio == last_notified_info_.audio &&
video == last_notified_info_.video) {
return;
}
last_notified_info_ = {video, audio};
if (auto client = browser_->GetClient()) {
if (auto handler = client->GetDisplayHandler()) {
handler->OnMediaAccessChange(browser_, video, audio);
}
}
}