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// Copyright 2014 The Chromium 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 "remoting/host/host_extension_session_manager.h"
#include "remoting/base/capabilities.h"
#include "remoting/codec/video_encoder.h"
#include "remoting/host/client_session_control.h"
#include "remoting/host/host_extension.h"
#include "remoting/host/host_extension_session.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_capturer.h"
namespace remoting {
HostExtensionSessionManager::HostExtensionSessionManager(
const std::vector<HostExtension*>& extensions,
ClientSessionControl* client_session_control)
: client_session_control_(client_session_control),
client_stub_(nullptr),
extensions_(extensions) {
}
HostExtensionSessionManager::~HostExtensionSessionManager() {
}
std::string HostExtensionSessionManager::GetCapabilities() const {
std::string capabilities;
for (HostExtensions::const_iterator extension = extensions_.begin();
extension != extensions_.end(); ++extension) {
const std::string& capability = (*extension)->capability();
if (capability.empty()) {
continue;
}
if (!capabilities.empty()) {
capabilities.append(" ");
}
capabilities.append(capability);
}
return capabilities;
}
void HostExtensionSessionManager::OnCreateVideoCapturer(
scoped_ptr<webrtc::DesktopCapturer>* capturer) {
for (HostExtensionSessions::const_iterator it = extension_sessions_.begin();
it != extension_sessions_.end(); ++it) {
if ((*it)->ModifiesVideoPipeline()) {
(*it)->OnCreateVideoCapturer(capturer);
}
}
}
void HostExtensionSessionManager::OnCreateVideoEncoder(
scoped_ptr<VideoEncoder>* encoder) {
for (HostExtensionSessions::const_iterator it = extension_sessions_.begin();
it != extension_sessions_.end(); ++it) {
if ((*it)->ModifiesVideoPipeline()) {
(*it)->OnCreateVideoEncoder(encoder);
}
}
}
void HostExtensionSessionManager::OnNegotiatedCapabilities(
protocol::ClientStub* client_stub,
const std::string& capabilities) {
DCHECK(client_stub);
DCHECK(!client_stub_);
client_stub_ = client_stub;
bool reset_video_pipeline = false;
for (HostExtensions::const_iterator extension = extensions_.begin();
extension != extensions_.end(); ++extension) {
// If the extension requires a capability that was not negotiated then do
// not instantiate it.
if (!(*extension)->capability().empty() &&
!HasCapability(capabilities, (*extension)->capability())) {
continue;
}
scoped_ptr<HostExtensionSession> extension_session =
(*extension)->CreateExtensionSession(
client_session_control_, client_stub_);
DCHECK(extension_session);
if (extension_session->ModifiesVideoPipeline()) {
reset_video_pipeline = true;
}
extension_sessions_.push_back(extension_session.release());
}
// Re-create the video pipeline if one or more extensions need to modify it.
if (reset_video_pipeline) {
client_session_control_->ResetVideoPipeline();
}
}
bool HostExtensionSessionManager::OnExtensionMessage(
const protocol::ExtensionMessage& message) {
for(HostExtensionSessions::const_iterator it = extension_sessions_.begin();
it != extension_sessions_.end(); ++it) {
if ((*it)->OnExtensionMessage(
client_session_control_, client_stub_, message)) {
return true;
}
}
return false;
}
} // namespace remoting
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