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// Copyright (c) 2011 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 "content/renderer/media/peer_connection_handler.h"
#include <stdlib.h>
#include <vector>
#include "base/bind.h"
#include "base/logging.h"
#include "base/string_number_conversions.h"
#include "base/utf_string_conversions.h"
#include "content/renderer/media/media_stream_dependency_factory.h"
#include "content/renderer/media/media_stream_impl.h"
#include "third_party/libjingle/source/talk/base/thread.h"
#include "third_party/libjingle/source/talk/p2p/client/httpportallocator.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaStreamDescriptor.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaStreamSource.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebPeerConnectionHandlerClient.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebVector.h"
PeerConnectionHandler::PeerConnectionHandler(
WebKit::WebPeerConnectionHandlerClient* client,
MediaStreamImpl* msi,
MediaStreamDependencyFactory* dependency_factory,
talk_base::Thread* signaling_thread,
cricket::HttpPortAllocator* port_allocator)
: client_(client),
media_stream_impl_(msi),
dependency_factory_(dependency_factory),
message_loop_proxy_(base::MessageLoopProxy::current()),
signaling_thread_(signaling_thread),
port_allocator_(port_allocator),
call_state_(NOT_STARTED) {
}
PeerConnectionHandler::~PeerConnectionHandler() {
if (native_peer_connection_.get()) {
native_peer_connection_->RegisterObserver(NULL);
native_peer_connection_->Close();
}
}
bool PeerConnectionHandler::SetVideoRenderer(
const std::string& stream_label,
cricket::VideoRenderer* renderer) {
return native_peer_connection_->SetVideoRenderer(stream_label, renderer);
}
void PeerConnectionHandler::initialize(
const WebKit::WebString& server_configuration,
const WebKit::WebSecurityOrigin& security_origin) {
// We support the following server configuration format:
// "STUN <address>:<port>". We only support STUN at the moment.
// Strip "STUN ".
std::string strip_string = "STUN ";
std::string config = UTF16ToUTF8(server_configuration);
size_t pos = config.find(strip_string);
if (pos != 0) {
DVLOG(1) << "Invalid configuration string.";
return;
}
config = config.substr(strip_string.length());
// Parse out port.
pos = config.find(':');
if (pos == std::string::npos) {
DVLOG(1) << "Invalid configuration string.";
return;
}
int port = 0;
bool success = base::StringToInt(config.substr(pos+1), &port);
if (!success || (port == 0)) {
DVLOG(1) << "Invalid configuration string.";
return;
}
// Get address.
std::string address = config.substr(0, pos);
std::vector<talk_base::SocketAddress> stun_hosts;
stun_hosts.push_back(talk_base::SocketAddress(address, port));
port_allocator_->SetStunHosts(stun_hosts);
native_peer_connection_.reset(dependency_factory_->CreatePeerConnection(
signaling_thread_));
native_peer_connection_->RegisterObserver(this);
}
void PeerConnectionHandler::produceInitialOffer(
const WebKit::WebVector<WebKit::WebMediaStreamDescriptor>&
pending_add_streams) {
// We currently don't support creating an initial offer without a stream.
// Native PeerConnection will anyway create the initial offer when the first
// (and only) stream is added, so it will be done when processPendingStreams
// is called if not here.
if (pending_add_streams.isEmpty()) {
DVLOG(1) << "Can't produce initial offer with no stream.";
return;
}
// TODO(grunell): Support several streams.
DCHECK_EQ(pending_add_streams.size(), 1u);
WebKit::WebVector<WebKit::WebMediaStreamSource> source_vector;
pending_add_streams[0].sources(source_vector);
DCHECK_GT(source_vector.size(), 0u);
std::string label = UTF16ToUTF8(source_vector[0].id());
AddStream(label);
}
void PeerConnectionHandler::handleInitialOffer(const WebKit::WebString& sdp) {
native_peer_connection_->SignalingMessage(UTF16ToUTF8(sdp));
}
void PeerConnectionHandler::processSDP(const WebKit::WebString& sdp) {
native_peer_connection_->SignalingMessage(UTF16ToUTF8(sdp));
}
void PeerConnectionHandler::processPendingStreams(
const WebKit::WebVector<WebKit::WebMediaStreamDescriptor>&
pending_add_streams,
const WebKit::WebVector<WebKit::WebMediaStreamDescriptor>&
pending_remove_streams) {
// TODO(grunell): Support several streams.
if (!pending_add_streams.isEmpty()) {
DCHECK_EQ(pending_add_streams.size(), 1u);
AddStream(UTF16ToUTF8(pending_add_streams[0].label()));
}
// Currently we ignore remove stream, no support in native PeerConnection.
}
void PeerConnectionHandler::sendDataStreamMessage(
const char* data,
size_t length) {
// TODO(grunell): Implement. Not supported in native PeerConnection.
NOTIMPLEMENTED();
}
void PeerConnectionHandler::stop() {
if (native_peer_connection_.get())
native_peer_connection_->RegisterObserver(NULL);
native_peer_connection_.reset();
// The close function will delete us.
media_stream_impl_->ClosePeerConnection();
}
void PeerConnectionHandler::OnSignalingMessage(const std::string& msg) {
if (!message_loop_proxy_->BelongsToCurrentThread()) {
message_loop_proxy_->PostTask(FROM_HERE, base::Bind(
&PeerConnectionHandler::OnSignalingMessage,
base::Unretained(this),
msg));
return;
}
client_->didGenerateSDP(UTF8ToUTF16(msg));
}
void PeerConnectionHandler::OnAddStream(const std::string& stream_id,
bool video) {
if (!video)
return;
if (!message_loop_proxy_->BelongsToCurrentThread()) {
message_loop_proxy_->PostTask(FROM_HERE, base::Bind(
&PeerConnectionHandler::OnAddStreamCallback,
base::Unretained(this),
stream_id));
} else {
OnAddStreamCallback(stream_id);
}
}
void PeerConnectionHandler::OnRemoveStream(
const std::string& stream_id,
bool video) {
if (!video)
return;
if (!message_loop_proxy_->BelongsToCurrentThread()) {
message_loop_proxy_->PostTask(FROM_HERE, base::Bind(
&PeerConnectionHandler::OnRemoveStreamCallback,
base::Unretained(this),
remote_label_));
} else {
OnRemoveStreamCallback(remote_label_);
}
}
void PeerConnectionHandler::AddStream(const std::string label) {
// TODO(grunell): Fix code in this function after a new native PeerConnection
// version has been rolled out.
if (call_state_ == NOT_STARTED) {
// TODO(grunell): Add audio and/or video depending on what's enabled
// in the stream.
std::string audio_label = label;
audio_label.append("-audio");
native_peer_connection_->AddStream(audio_label, false); // Audio
native_peer_connection_->AddStream(label, true); // Video
call_state_ = INITIATING;
}
if (call_state_ == INITIATING || call_state_ == RECEIVING) {
local_label_ = label;
if (media_stream_impl_->SetVideoCaptureModule(label))
native_peer_connection_->SetVideoCapture("");
if (call_state_ == INITIATING)
native_peer_connection_->Connect();
else if (call_state_ == RECEIVING)
call_state_ = SENDING_AND_RECEIVING;
} else {
DLOG(ERROR) << "Multiple streams not supported";
}
}
void PeerConnectionHandler::OnAddStreamCallback(
const std::string& stream_label) {
// TODO(grunell): Fix code in this function after a new native PeerConnection
// version has been rolled out.
if (call_state_ == NOT_STARTED) {
remote_label_ = stream_label;
call_state_ = RECEIVING;
} else if (call_state_ == INITIATING) {
remote_label_ = local_label_;
remote_label_ += "-remote";
call_state_ = SENDING_AND_RECEIVING;
}
// TODO(grunell): Support several tracks.
WebKit::WebVector<WebKit::WebMediaStreamSource>
source_vector(static_cast<size_t>(2));
source_vector[0].initialize(WebKit::WebString::fromUTF8(remote_label_),
WebKit::WebMediaStreamSource::TypeVideo,
WebKit::WebString::fromUTF8("RemoteVideo"));
source_vector[1].initialize(WebKit::WebString::fromUTF8(remote_label_),
WebKit::WebMediaStreamSource::TypeAudio,
WebKit::WebString::fromUTF8("RemoteAudio"));
WebKit::WebMediaStreamDescriptor descriptor;
descriptor.initialize(UTF8ToUTF16(remote_label_), source_vector);
client_->didAddRemoteStream(descriptor);
}
void PeerConnectionHandler::OnRemoveStreamCallback(
const std::string& stream_label) {
// TODO(grunell): Support several tracks.
WebKit::WebVector<WebKit::WebMediaStreamSource>
source_vector(static_cast<size_t>(2));
source_vector[0].initialize(WebKit::WebString::fromUTF8(stream_label),
WebKit::WebMediaStreamSource::TypeVideo,
WebKit::WebString::fromUTF8("RemoteVideo"));
source_vector[1].initialize(WebKit::WebString::fromUTF8(stream_label),
WebKit::WebMediaStreamSource::TypeAudio,
WebKit::WebString::fromUTF8("RemoteAudio"));
WebKit::WebMediaStreamDescriptor descriptor;
descriptor.initialize(UTF8ToUTF16(stream_label), source_vector);
client_->didRemoveRemoteStream(descriptor);
}
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