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webrtc/pc/channel.cc
Niels Möller f120cba82d Delete AudioMonitor and related code. 
Bug: webrtc:8760
Change-Id: I0b11ec66b0f2576f52866864ba046191034a4d2d
Reviewed-on: https://webrtc-review.googlesource.com/39003
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
Reviewed-by: Noah Richards <noahric@chromium.org>
Cr-Commit-Position: refs/heads/master@{#21801}
2018-01-30 09:48:29 +00:00

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/*
* Copyright 2004 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 <algorithm>
#include <iterator>
#include <utility>
#include "pc/channel.h"
#include "api/call/audio_sink.h"
#include "media/base/mediaconstants.h"
#include "media/base/rtputils.h"
#include "rtc_base/bind.h"
#include "rtc_base/byteorder.h"
#include "rtc_base/checks.h"
#include "rtc_base/copyonwritebuffer.h"
#include "rtc_base/dscp.h"
#include "rtc_base/logging.h"
#include "rtc_base/networkroute.h"
#include "rtc_base/ptr_util.h"
#include "rtc_base/trace_event.h"
// Adding 'nogncheck' to disable the gn include headers check to support modular
// WebRTC build targets.
#include "media/engine/webrtcvoiceengine.h" // nogncheck
#include "p2p/base/packettransportinternal.h"
#include "pc/channelmanager.h"
#include "pc/rtpmediautils.h"
namespace cricket {
using rtc::Bind;
using webrtc::SdpType;
namespace {
struct SendPacketMessageData : public rtc::MessageData {
rtc::CopyOnWriteBuffer packet;
rtc::PacketOptions options;
};
} // namespace
enum {
MSG_EARLYMEDIATIMEOUT = 1,
MSG_SEND_RTP_PACKET,
MSG_SEND_RTCP_PACKET,
MSG_READYTOSENDDATA,
MSG_DATARECEIVED,
MSG_FIRSTPACKETRECEIVED,
};
static void SafeSetError(const std::string& message, std::string* error_desc) {
if (error_desc) {
*error_desc = message;
}
}
static bool ValidPacket(bool rtcp, const rtc::CopyOnWriteBuffer* packet) {
// Check the packet size. We could check the header too if needed.
return packet && IsValidRtpRtcpPacketSize(rtcp, packet->size());
}
template <class Codec>
void RtpParametersFromMediaDescription(
const MediaContentDescriptionImpl<Codec>* desc,
const RtpHeaderExtensions& extensions,
RtpParameters<Codec>* params) {
// TODO(pthatcher): Remove this once we're sure no one will give us
// a description without codecs. Currently the ORTC implementation is relying
// on this.
if (desc->has_codecs()) {
params->codecs = desc->codecs();
}
// TODO(pthatcher): See if we really need
// rtp_header_extensions_set() and remove it if we don't.
if (desc->rtp_header_extensions_set()) {
params->extensions = extensions;
}
params->rtcp.reduced_size = desc->rtcp_reduced_size();
}
template <class Codec>
void RtpSendParametersFromMediaDescription(
const MediaContentDescriptionImpl<Codec>* desc,
const RtpHeaderExtensions& extensions,
RtpSendParameters<Codec>* send_params) {
RtpParametersFromMediaDescription(desc, extensions, send_params);
send_params->max_bandwidth_bps = desc->bandwidth();
}
BaseChannel::BaseChannel(rtc::Thread* worker_thread,
rtc::Thread* network_thread,
rtc::Thread* signaling_thread,
std::unique_ptr<MediaChannel> media_channel,
const std::string& content_name,
bool rtcp_mux_required,
bool srtp_required)
: worker_thread_(worker_thread),
network_thread_(network_thread),
signaling_thread_(signaling_thread),
content_name_(content_name),
rtcp_mux_required_(rtcp_mux_required),
unencrypted_rtp_transport_(
rtc::MakeUnique<webrtc::RtpTransport>(rtcp_mux_required)),
srtp_required_(srtp_required),
media_channel_(std::move(media_channel)) {
RTC_DCHECK_RUN_ON(worker_thread_);
rtp_transport_ = unencrypted_rtp_transport_.get();
ConnectToRtpTransport();
RTC_LOG(LS_INFO) << "Created channel for " << content_name;
}
BaseChannel::~BaseChannel() {
TRACE_EVENT0("webrtc", "BaseChannel::~BaseChannel");
RTC_DCHECK_RUN_ON(worker_thread_);
Deinit();
// Eats any outstanding messages or packets.
worker_thread_->Clear(&invoker_);
worker_thread_->Clear(this);
// We must destroy the media channel before the transport channel, otherwise
// the media channel may try to send on the dead transport channel. NULLing
// is not an effective strategy since the sends will come on another thread.
media_channel_.reset();
RTC_LOG(LS_INFO) << "Destroyed channel: " << content_name_;
}
void BaseChannel::ConnectToRtpTransport() {
RTC_DCHECK(rtp_transport_);
rtp_transport_->SignalReadyToSend.connect(
this, &BaseChannel::OnTransportReadyToSend);
// TODO(zstein): RtpTransport::SignalPacketReceived will probably be replaced
// with a callback interface later so that the demuxer can select which
// channel to signal.
rtp_transport_->SignalPacketReceived.connect(this,
&BaseChannel::OnPacketReceived);
rtp_transport_->SignalNetworkRouteChanged.connect(
this, &BaseChannel::OnNetworkRouteChanged);
rtp_transport_->SignalWritableState.connect(this,
&BaseChannel::OnWritableState);
rtp_transport_->SignalSentPacket.connect(this,
&BaseChannel::SignalSentPacket_n);
}
void BaseChannel::DisconnectFromRtpTransport() {
RTC_DCHECK(rtp_transport_);
rtp_transport_->SignalReadyToSend.disconnect(this);
rtp_transport_->SignalPacketReceived.disconnect(this);
rtp_transport_->SignalNetworkRouteChanged.disconnect(this);
rtp_transport_->SignalWritableState.disconnect(this);
rtp_transport_->SignalSentPacket.disconnect(this);
}
void BaseChannel::Init_w(DtlsTransportInternal* rtp_dtls_transport,
DtlsTransportInternal* rtcp_dtls_transport,
rtc::PacketTransportInternal* rtp_packet_transport,
rtc::PacketTransportInternal* rtcp_packet_transport) {
RTC_DCHECK_RUN_ON(worker_thread_);
network_thread_->Invoke<void>(RTC_FROM_HERE, [&] {
SetTransports_n(rtp_dtls_transport, rtcp_dtls_transport,
rtp_packet_transport, rtcp_packet_transport);
if (rtcp_mux_required_) {
rtcp_mux_filter_.SetActive();
}
});
// Both RTP and RTCP channels should be set, we can call SetInterface on
// the media channel and it can set network options.
media_channel_->SetInterface(this);
}
void BaseChannel::Init_w(webrtc::RtpTransportInternal* rtp_transport) {
RTC_DCHECK_RUN_ON(worker_thread_);
network_thread_->Invoke<void>(RTC_FROM_HERE, [&] {
SetRtpTransport(rtp_transport);
if (rtcp_mux_required_) {
rtcp_mux_filter_.SetActive();
}
});
// Both RTP and RTCP channels should be set, we can call SetInterface on
// the media channel and it can set network options.
media_channel_->SetInterface(this);
}
void BaseChannel::Deinit() {
RTC_DCHECK(worker_thread_->IsCurrent());
media_channel_->SetInterface(NULL);
// Packets arrive on the network thread, processing packets calls virtual
// functions, so need to stop this process in Deinit that is called in
// derived classes destructor.
network_thread_->Invoke<void>(RTC_FROM_HERE, [&] {
FlushRtcpMessages_n();
if (dtls_srtp_transport_) {
dtls_srtp_transport_->SetDtlsTransports(nullptr, nullptr);
} else {
rtp_transport_->SetRtpPacketTransport(nullptr);
rtp_transport_->SetRtcpPacketTransport(nullptr);
}
// Clear pending read packets/messages.
network_thread_->Clear(&invoker_);
network_thread_->Clear(this);
});
}
void BaseChannel::SetRtpTransport(webrtc::RtpTransportInternal* rtp_transport) {
if (!network_thread_->IsCurrent()) {
network_thread_->Invoke<void>(RTC_FROM_HERE, [&] {
SetRtpTransport(rtp_transport);
return;
});
}
RTC_DCHECK(rtp_transport);
if (rtp_transport_) {
DisconnectFromRtpTransport();
}
rtp_transport_ = rtp_transport;
RTC_LOG(LS_INFO) << "Setting the RtpTransport for " << content_name();
ConnectToRtpTransport();
UpdateWritableState_n();
}
void BaseChannel::SetTransports(DtlsTransportInternal* rtp_dtls_transport,
DtlsTransportInternal* rtcp_dtls_transport) {
network_thread_->Invoke<void>(
RTC_FROM_HERE,
Bind(&BaseChannel::SetTransports_n, this, rtp_dtls_transport,
rtcp_dtls_transport, rtp_dtls_transport, rtcp_dtls_transport));
}
void BaseChannel::SetTransports(
rtc::PacketTransportInternal* rtp_packet_transport,
rtc::PacketTransportInternal* rtcp_packet_transport) {
network_thread_->Invoke<void>(
RTC_FROM_HERE, Bind(&BaseChannel::SetTransports_n, this, nullptr, nullptr,
rtp_packet_transport, rtcp_packet_transport));
}
void BaseChannel::SetTransports_n(
DtlsTransportInternal* rtp_dtls_transport,
DtlsTransportInternal* rtcp_dtls_transport,
rtc::PacketTransportInternal* rtp_packet_transport,
rtc::PacketTransportInternal* rtcp_packet_transport) {
RTC_DCHECK(network_thread_->IsCurrent());
// Validate some assertions about the input.
RTC_DCHECK(rtp_packet_transport);
RTC_DCHECK_EQ(NeedsRtcpTransport(), rtcp_packet_transport != nullptr);
if (rtp_dtls_transport || rtcp_dtls_transport) {
// DTLS/non-DTLS pointers should be to the same object.
RTC_DCHECK(rtp_dtls_transport == rtp_packet_transport);
RTC_DCHECK(rtcp_dtls_transport == rtcp_packet_transport);
// Can't go from non-DTLS to DTLS.
RTC_DCHECK(!rtp_transport_->rtp_packet_transport() || rtp_dtls_transport_);
} else {
// Can't go from DTLS to non-DTLS.
RTC_DCHECK(!rtp_dtls_transport_);
}
// Transport names should be the same.
if (rtp_dtls_transport && rtcp_dtls_transport) {
RTC_DCHECK(rtp_dtls_transport->transport_name() ==
rtcp_dtls_transport->transport_name());
}
if (rtp_packet_transport == rtp_transport_->rtp_packet_transport()) {
// Nothing to do if transport isn't changing.
return;
}
std::string debug_name;
if (rtp_dtls_transport) {
transport_name_ = rtp_dtls_transport->transport_name();
debug_name = transport_name_;
} else {
debug_name = rtp_packet_transport->transport_name();
}
// If this BaseChannel doesn't require RTCP mux and we haven't fully
// negotiated RTCP mux, we need an RTCP transport.
if (rtcp_packet_transport) {
RTC_LOG(LS_INFO) << "Setting RTCP Transport for " << content_name()
<< " on " << debug_name << " transport "
<< rtcp_packet_transport;
SetTransport_n(/*rtcp=*/true, rtcp_dtls_transport, rtcp_packet_transport);
}
RTC_LOG(LS_INFO) << "Setting RTP Transport for " << content_name() << " on "
<< debug_name << " transport " << rtp_packet_transport;
SetTransport_n(/*rtcp=*/false, rtp_dtls_transport, rtp_packet_transport);
// Set DtlsTransport/PacketTransport for RTP-level transport.
if ((rtp_dtls_transport_ || rtcp_dtls_transport_) && dtls_srtp_transport_) {
// When setting the transport with non-null |dtls_srtp_transport_|, we are
// using DTLS-SRTP. This could happen for bundling. If the
// |dtls_srtp_transport| is null, we cannot tell if it doing DTLS-SRTP or
// SDES until the description is set. So don't call |EnableDtlsSrtp_n| here.
dtls_srtp_transport_->SetDtlsTransports(rtp_dtls_transport,
rtcp_dtls_transport);
} else {
rtp_transport_->SetRtpPacketTransport(rtp_packet_transport);
rtp_transport_->SetRtcpPacketTransport(rtcp_packet_transport);
}
// Update aggregate writable/ready-to-send state between RTP and RTCP upon
// setting new transport channels.
UpdateWritableState_n();
}
void BaseChannel::SetTransport_n(
bool rtcp,
DtlsTransportInternal* new_dtls_transport,
rtc::PacketTransportInternal* new_packet_transport) {
RTC_DCHECK(network_thread_->IsCurrent());
if (new_dtls_transport) {
RTC_DCHECK(new_dtls_transport == new_packet_transport);
}
DtlsTransportInternal*& old_dtls_transport =
rtcp ? rtcp_dtls_transport_ : rtp_dtls_transport_;
rtc::PacketTransportInternal* old_packet_transport =
rtcp ? rtp_transport_->rtcp_packet_transport()
: rtp_transport_->rtp_packet_transport();
if (!old_packet_transport && !new_packet_transport) {
// Nothing to do.
return;
}
RTC_DCHECK(old_packet_transport != new_packet_transport);
old_dtls_transport = new_dtls_transport;
// If there's no new transport, we're done.
if (!new_packet_transport) {
return;
}
if (rtcp && new_dtls_transport) {
RTC_CHECK(!(ShouldSetupDtlsSrtp_n() && srtp_active()))
<< "Setting RTCP for DTLS/SRTP after the DTLS is active "
<< "should never happen.";
}
auto& socket_options = rtcp ? rtcp_socket_options_ : socket_options_;
for (const auto& pair : socket_options) {
new_packet_transport->SetOption(pair.first, pair.second);
}
}
bool BaseChannel::Enable(bool enable) {
worker_thread_->Invoke<void>(
RTC_FROM_HERE,
Bind(enable ? &BaseChannel::EnableMedia_w : &BaseChannel::DisableMedia_w,
this));
return true;
}
bool BaseChannel::AddRecvStream(const StreamParams& sp) {
return InvokeOnWorker<bool>(RTC_FROM_HERE,
Bind(&BaseChannel::AddRecvStream_w, this, sp));
}
bool BaseChannel::RemoveRecvStream(uint32_t ssrc) {
return InvokeOnWorker<bool>(
RTC_FROM_HERE, Bind(&BaseChannel::RemoveRecvStream_w, this, ssrc));
}
bool BaseChannel::AddSendStream(const StreamParams& sp) {
return InvokeOnWorker<bool>(
RTC_FROM_HERE, Bind(&MediaChannel::AddSendStream, media_channel(), sp));
}
bool BaseChannel::RemoveSendStream(uint32_t ssrc) {
return InvokeOnWorker<bool>(
RTC_FROM_HERE,
Bind(&MediaChannel::RemoveSendStream, media_channel(), ssrc));
}
bool BaseChannel::SetLocalContent(const MediaContentDescription* content,
SdpType type,
std::string* error_desc) {
TRACE_EVENT0("webrtc", "BaseChannel::SetLocalContent");
return InvokeOnWorker<bool>(
RTC_FROM_HERE,
Bind(&BaseChannel::SetLocalContent_w, this, content, type, error_desc));
}
bool BaseChannel::SetRemoteContent(const MediaContentDescription* content,
SdpType type,
std::string* error_desc) {
TRACE_EVENT0("webrtc", "BaseChannel::SetRemoteContent");
return InvokeOnWorker<bool>(
RTC_FROM_HERE,
Bind(&BaseChannel::SetRemoteContent_w, this, content, type, error_desc));
}
bool BaseChannel::NeedsRtcpTransport() {
// If this BaseChannel doesn't require RTCP mux and we haven't fully
// negotiated RTCP mux, we need an RTCP transport.
return !rtcp_mux_required_ && !rtcp_mux_filter_.IsFullyActive();
}
bool BaseChannel::IsReadyToReceiveMedia_w() const {
// Receive data if we are enabled and have local content,
return enabled() &&
webrtc::RtpTransceiverDirectionHasRecv(local_content_direction_);
}
bool BaseChannel::IsReadyToSendMedia_w() const {
// Need to access some state updated on the network thread.
return network_thread_->Invoke<bool>(
RTC_FROM_HERE, Bind(&BaseChannel::IsReadyToSendMedia_n, this));
}
bool BaseChannel::IsReadyToSendMedia_n() const {
// Send outgoing data if we are enabled, have local and remote content,
// and we have had some form of connectivity.
return enabled() &&
webrtc::RtpTransceiverDirectionHasRecv(remote_content_direction_) &&
webrtc::RtpTransceiverDirectionHasSend(local_content_direction_) &&
was_ever_writable() && (srtp_active() || !ShouldSetupDtlsSrtp_n());
}
bool BaseChannel::SendPacket(rtc::CopyOnWriteBuffer* packet,
const rtc::PacketOptions& options) {
return SendPacket(false, packet, options);
}
bool BaseChannel::SendRtcp(rtc::CopyOnWriteBuffer* packet,
const rtc::PacketOptions& options) {
return SendPacket(true, packet, options);
}
int BaseChannel::SetOption(SocketType type, rtc::Socket::Option opt,
int value) {
return network_thread_->Invoke<int>(
RTC_FROM_HERE, Bind(&BaseChannel::SetOption_n, this, type, opt, value));
}
int BaseChannel::SetOption_n(SocketType type,
rtc::Socket::Option opt,
int value) {
RTC_DCHECK(network_thread_->IsCurrent());
rtc::PacketTransportInternal* transport = nullptr;
switch (type) {
case ST_RTP:
transport = rtp_transport_->rtp_packet_transport();
socket_options_.push_back(
std::pair<rtc::Socket::Option, int>(opt, value));
break;
case ST_RTCP:
transport = rtp_transport_->rtcp_packet_transport();
rtcp_socket_options_.push_back(
std::pair<rtc::Socket::Option, int>(opt, value));
break;
}
return transport ? transport->SetOption(opt, value) : -1;
}
void BaseChannel::OnWritableState(bool writable) {
RTC_DCHECK(network_thread_->IsCurrent());
if (writable) {
// This is used to cover the scenario when the DTLS handshake is completed
// and DtlsTransport becomes writable before the remote description is set.
if (ShouldSetupDtlsSrtp_n()) {
EnableDtlsSrtp_n();
}
ChannelWritable_n();
} else {
ChannelNotWritable_n();
}
}
void BaseChannel::OnNetworkRouteChanged(
rtc::Optional<rtc::NetworkRoute> network_route) {
RTC_DCHECK(network_thread_->IsCurrent());
rtc::NetworkRoute new_route;
if (network_route) {
new_route = *(network_route);
}
// Note: When the RTCP-muxing is not enabled, RTCP transport and RTP transport
// use the same transport name and MediaChannel::OnNetworkRouteChanged cannot
// work correctly. Intentionally leave it broken to simplify the code and
// encourage the users to stop using non-muxing RTCP.
invoker_.AsyncInvoke<void>(RTC_FROM_HERE, worker_thread_, [=] {
media_channel_->OnNetworkRouteChanged(transport_name_, new_route);
});
}
void BaseChannel::OnTransportReadyToSend(bool ready) {
invoker_.AsyncInvoke<void>(RTC_FROM_HERE, worker_thread_,
[=] { media_channel_->OnReadyToSend(ready); });
}
bool BaseChannel::SendPacket(bool rtcp,
rtc::CopyOnWriteBuffer* packet,
const rtc::PacketOptions& options) {
// SendPacket gets called from MediaEngine, on a pacer or an encoder thread.
// If the thread is not our network thread, we will post to our network
// so that the real work happens on our network. This avoids us having to
// synchronize access to all the pieces of the send path, including
// SRTP and the inner workings of the transport channels.
// The only downside is that we can't return a proper failure code if
// needed. Since UDP is unreliable anyway, this should be a non-issue.
if (!network_thread_->IsCurrent()) {
// Avoid a copy by transferring the ownership of the packet data.
int message_id = rtcp ? MSG_SEND_RTCP_PACKET : MSG_SEND_RTP_PACKET;
SendPacketMessageData* data = new SendPacketMessageData;
data->packet = std::move(*packet);
data->options = options;
network_thread_->Post(RTC_FROM_HERE, this, message_id, data);
return true;
}
TRACE_EVENT0("webrtc", "BaseChannel::SendPacket");
// Now that we are on the correct thread, ensure we have a place to send this
// packet before doing anything. (We might get RTCP packets that we don't
// intend to send.) If we've negotiated RTCP mux, send RTCP over the RTP
// transport.
if (!rtp_transport_->IsWritable(rtcp)) {
return false;
}
// Protect ourselves against crazy data.
if (!ValidPacket(rtcp, packet)) {
RTC_LOG(LS_ERROR) << "Dropping outgoing " << content_name_ << " "
<< RtpRtcpStringLiteral(rtcp)
<< " packet: wrong size=" << packet->size();
return false;
}
if (!srtp_active()) {
if (srtp_required_) {
// The audio/video engines may attempt to send RTCP packets as soon as the
// streams are created, so don't treat this as an error for RTCP.
// See: https://bugs.chromium.org/p/webrtc/issues/detail?id=6809
if (rtcp) {
return false;
}
// However, there shouldn't be any RTP packets sent before SRTP is set up
// (and SetSend(true) is called).
RTC_LOG(LS_ERROR)
<< "Can't send outgoing RTP packet when SRTP is inactive"
<< " and crypto is required";
RTC_NOTREACHED();
return false;
}
std::string packet_type = rtcp ? "RTCP" : "RTP";
RTC_LOG(LS_WARNING) << "Sending an " << packet_type
<< " packet without encryption.";
} else {
// Make sure we didn't accidentally send any packets without encryption.
RTC_DCHECK(rtp_transport_ == sdes_transport_.get() ||
rtp_transport_ == dtls_srtp_transport_.get());
}
// Bon voyage.
return rtcp ? rtp_transport_->SendRtcpPacket(packet, options, PF_SRTP_BYPASS)
: rtp_transport_->SendRtpPacket(packet, options, PF_SRTP_BYPASS);
}
bool BaseChannel::HandlesPayloadType(int packet_type) const {
return rtp_transport_->HandlesPayloadType(packet_type);
}
void BaseChannel::OnPacketReceived(bool rtcp,
rtc::CopyOnWriteBuffer* packet,
const rtc::PacketTime& packet_time) {
if (!has_received_packet_ && !rtcp) {
has_received_packet_ = true;
signaling_thread()->Post(RTC_FROM_HERE, this, MSG_FIRSTPACKETRECEIVED);
}
if (!srtp_active() && srtp_required_) {
// Our session description indicates that SRTP is required, but we got a
// packet before our SRTP filter is active. This means either that
// a) we got SRTP packets before we received the SDES keys, in which case
// we can't decrypt it anyway, or
// b) we got SRTP packets before DTLS completed on both the RTP and RTCP
// transports, so we haven't yet extracted keys, even if DTLS did
// complete on the transport that the packets are being sent on. It's
// really good practice to wait for both RTP and RTCP to be good to go
// before sending media, to prevent weird failure modes, so it's fine
// for us to just eat packets here. This is all sidestepped if RTCP mux
// is used anyway.
RTC_LOG(LS_WARNING)
<< "Can't process incoming " << RtpRtcpStringLiteral(rtcp)
<< " packet when SRTP is inactive and crypto is required";
return;
}
invoker_.AsyncInvoke<void>(
RTC_FROM_HERE, worker_thread_,
Bind(&BaseChannel::ProcessPacket, this, rtcp, *packet, packet_time));
}
void BaseChannel::ProcessPacket(bool rtcp,
const rtc::CopyOnWriteBuffer& packet,
const rtc::PacketTime& packet_time) {
RTC_DCHECK(worker_thread_->IsCurrent());
// Need to copy variable because OnRtcpReceived/OnPacketReceived
// requires non-const pointer to buffer. This doesn't memcpy the actual data.
rtc::CopyOnWriteBuffer data(packet);
if (rtcp) {
media_channel_->OnRtcpReceived(&data, packet_time);
} else {
media_channel_->OnPacketReceived(&data, packet_time);
}
}
void BaseChannel::EnableMedia_w() {
RTC_DCHECK(worker_thread_ == rtc::Thread::Current());
if (enabled_)
return;
RTC_LOG(LS_INFO) << "Channel enabled";
enabled_ = true;
UpdateMediaSendRecvState_w();
}
void BaseChannel::DisableMedia_w() {
RTC_DCHECK(worker_thread_ == rtc::Thread::Current());
if (!enabled_)
return;
RTC_LOG(LS_INFO) << "Channel disabled";
enabled_ = false;
UpdateMediaSendRecvState_w();
}
void BaseChannel::UpdateWritableState_n() {
rtc::PacketTransportInternal* rtp_packet_transport =
rtp_transport_->rtp_packet_transport();
rtc::PacketTransportInternal* rtcp_packet_transport =
rtp_transport_->rtcp_packet_transport();
if (rtp_packet_transport && rtp_packet_transport->writable() &&
(!rtcp_packet_transport || rtcp_packet_transport->writable())) {
ChannelWritable_n();
} else {
ChannelNotWritable_n();
}
}
void BaseChannel::ChannelWritable_n() {
RTC_DCHECK(network_thread_->IsCurrent());
if (writable_) {
return;
}
RTC_LOG(LS_INFO) << "Channel writable (" << content_name_ << ")"
<< (was_ever_writable_ ? "" : " for the first time");
was_ever_writable_ = true;
writable_ = true;
UpdateMediaSendRecvState();
}
bool BaseChannel::ShouldSetupDtlsSrtp_n() const {
// Since DTLS is applied to all transports, checking RTP should be enough.
return rtp_dtls_transport_ && rtp_dtls_transport_->IsDtlsActive();
}
void BaseChannel::ChannelNotWritable_n() {
RTC_DCHECK(network_thread_->IsCurrent());
if (!writable_)
return;
RTC_LOG(LS_INFO) << "Channel not writable (" << content_name_ << ")";
writable_ = false;
UpdateMediaSendRecvState();
}
bool BaseChannel::SetRtpTransportParameters(
const MediaContentDescription* content,
SdpType type,
ContentSource src,
const RtpHeaderExtensions& extensions,
std::string* error_desc) {
std::vector<int> encrypted_extension_ids;
for (const webrtc::RtpExtension& extension : extensions) {
if (extension.encrypt) {
RTC_LOG(LS_INFO) << "Using " << (src == CS_LOCAL ? "local" : "remote")
<< " encrypted extension: " << extension.ToString();
encrypted_extension_ids.push_back(extension.id);
}
}
// Cache srtp_required_ for belt and suspenders check on SendPacket
return network_thread_->Invoke<bool>(
RTC_FROM_HERE,
Bind(&BaseChannel::SetRtpTransportParameters_n, this, content, type, src,
encrypted_extension_ids, error_desc));
}
bool BaseChannel::SetRtpTransportParameters_n(
const MediaContentDescription* content,
SdpType type,
ContentSource src,
const std::vector<int>& encrypted_extension_ids,
std::string* error_desc) {
RTC_DCHECK(network_thread_->IsCurrent());
if (!SetSrtp_n(content->cryptos(), type, src, encrypted_extension_ids,
error_desc)) {
return false;
}
if (!SetRtcpMux_n(content->rtcp_mux(), type, src, error_desc)) {
return false;
}
return true;
}
// |dtls| will be set to true if DTLS is active for transport and crypto is
// empty.
bool BaseChannel::CheckSrtpConfig_n(const std::vector<CryptoParams>& cryptos,
bool* dtls,
std::string* error_desc) {
*dtls = rtp_dtls_transport_ && rtp_dtls_transport_->IsDtlsActive();
if (*dtls && !cryptos.empty()) {
SafeSetError("Cryptos must be empty when DTLS is active.", error_desc);
return false;
}
return true;
}
void BaseChannel::EnableSdes_n() {
if (sdes_transport_) {
return;
}
// DtlsSrtpTransport and SrtpTransport shouldn't be enabled at the same
// time.
RTC_DCHECK(!dtls_srtp_transport_);
RTC_DCHECK(unencrypted_rtp_transport_);
sdes_transport_ = rtc::MakeUnique<webrtc::SrtpTransport>(
std::move(unencrypted_rtp_transport_));
#if defined(ENABLE_EXTERNAL_AUTH)
sdes_transport_->EnableExternalAuth();
#endif
SetRtpTransport(sdes_transport_.get());
RTC_LOG(LS_INFO) << "Wrapping RtpTransport in SrtpTransport.";
}
void BaseChannel::EnableDtlsSrtp_n() {
if (dtls_srtp_transport_) {
return;
}
// DtlsSrtpTransport and SrtpTransport shouldn't be enabled at the same
// time.
RTC_DCHECK(!sdes_transport_);
RTC_DCHECK(unencrypted_rtp_transport_);
auto srtp_transport = rtc::MakeUnique<webrtc::SrtpTransport>(
std::move(unencrypted_rtp_transport_));
#if defined(ENABLE_EXTERNAL_AUTH)
srtp_transport->EnableExternalAuth();
#endif
dtls_srtp_transport_ =
rtc::MakeUnique<webrtc::DtlsSrtpTransport>(std::move(srtp_transport));
SetRtpTransport(dtls_srtp_transport_.get());
if (cached_send_extension_ids_) {
dtls_srtp_transport_->UpdateSendEncryptedHeaderExtensionIds(
*cached_send_extension_ids_);
}
if (cached_recv_extension_ids_) {
dtls_srtp_transport_->UpdateRecvEncryptedHeaderExtensionIds(
*cached_recv_extension_ids_);
}
// Set the DtlsTransport and the |dtls_srtp_transport_| will handle the DTLS
// relate signal internally.
RTC_DCHECK(rtp_dtls_transport_);
dtls_srtp_transport_->SetDtlsTransports(rtp_dtls_transport_,
rtcp_dtls_transport_);
RTC_LOG(LS_INFO) << "Wrapping SrtpTransport in DtlsSrtpTransport.";
}
bool BaseChannel::SetSrtp_n(const std::vector<CryptoParams>& cryptos,
SdpType type,
ContentSource src,
const std::vector<int>& encrypted_extension_ids,
std::string* error_desc) {
TRACE_EVENT0("webrtc", "BaseChannel::SetSrtp_w");
bool ret = false;
bool dtls = false;
ret = CheckSrtpConfig_n(cryptos, &dtls, error_desc);
if (!ret) {
return false;
}
// If SRTP was not required, but we're setting a description that uses SDES,
// we need to upgrade to an SrtpTransport.
if (!sdes_transport_ && !dtls && !cryptos.empty()) {
EnableSdes_n();
}
if ((type == SdpType::kAnswer || type == SdpType::kPrAnswer) && dtls) {
EnableDtlsSrtp_n();
}
UpdateEncryptedHeaderExtensionIds(src, encrypted_extension_ids);
if (!dtls) {
switch (type) {
case SdpType::kOffer:
ret = sdes_negotiator_.SetOffer(cryptos, src);
break;
case SdpType::kPrAnswer:
ret = sdes_negotiator_.SetProvisionalAnswer(cryptos, src);
break;
case SdpType::kAnswer:
ret = sdes_negotiator_.SetAnswer(cryptos, src);
break;
default:
break;
}
// If setting an SDES answer succeeded, apply the negotiated parameters
// to the SRTP transport.
if ((type == SdpType::kPrAnswer || type == SdpType::kAnswer) && ret) {
if (sdes_negotiator_.send_cipher_suite() &&
sdes_negotiator_.recv_cipher_suite()) {
RTC_DCHECK(cached_send_extension_ids_);
RTC_DCHECK(cached_recv_extension_ids_);
ret = sdes_transport_->SetRtpParams(
*(sdes_negotiator_.send_cipher_suite()),
sdes_negotiator_.send_key().data(),
static_cast<int>(sdes_negotiator_.send_key().size()),
*(cached_send_extension_ids_),
*(sdes_negotiator_.recv_cipher_suite()),
sdes_negotiator_.recv_key().data(),
static_cast<int>(sdes_negotiator_.recv_key().size()),
*(cached_recv_extension_ids_));
} else {
RTC_LOG(LS_INFO) << "No crypto keys are provided for SDES.";
if (type == SdpType::kAnswer && sdes_transport_) {
// Explicitly reset the |sdes_transport_| if no crypto param is
// provided in the answer. No need to call |ResetParams()| for
// |sdes_negotiator_| because it resets the params inside |SetAnswer|.
sdes_transport_->ResetParams();
}
}
}
}
if (!ret) {
SafeSetError("Failed to setup SRTP.", error_desc);
return false;
}
return true;
}
bool BaseChannel::SetRtcpMux_n(bool enable,
SdpType type,
ContentSource src,
std::string* error_desc) {
// Provide a more specific error message for the RTCP mux "require" policy
// case.
if (rtcp_mux_required_ && !enable) {
SafeSetError(
"rtcpMuxPolicy is 'require', but media description does not "
"contain 'a=rtcp-mux'.",
error_desc);
return false;
}
bool ret = false;
switch (type) {
case SdpType::kOffer:
ret = rtcp_mux_filter_.SetOffer(enable, src);
break;
case SdpType::kPrAnswer:
// This may activate RTCP muxing, but we don't yet destroy the transport
// because the final answer may deactivate it.
ret = rtcp_mux_filter_.SetProvisionalAnswer(enable, src);
break;
case SdpType::kAnswer:
ret = rtcp_mux_filter_.SetAnswer(enable, src);
if (ret && rtcp_mux_filter_.IsActive()) {
ActivateRtcpMux();
}
break;
default:
break;
}
if (!ret) {
SafeSetError("Failed to setup RTCP mux filter.", error_desc);
return false;
}
rtp_transport_->SetRtcpMuxEnabled(rtcp_mux_filter_.IsActive());
// |rtcp_mux_filter_| can be active if |action| is SdpType::kPrAnswer or
// SdpType::kAnswer, but we only want to tear down the RTCP transport if we
// received a final answer.
if (rtcp_mux_filter_.IsActive()) {
// If the RTP transport is already writable, then so are we.
if (rtp_transport_->rtp_packet_transport()->writable()) {
ChannelWritable_n();
}
}
return true;
}
bool BaseChannel::AddRecvStream_w(const StreamParams& sp) {
RTC_DCHECK(worker_thread() == rtc::Thread::Current());
return media_channel()->AddRecvStream(sp);
}
bool BaseChannel::RemoveRecvStream_w(uint32_t ssrc) {
RTC_DCHECK(worker_thread() == rtc::Thread::Current());
return media_channel()->RemoveRecvStream(ssrc);
}
bool BaseChannel::UpdateLocalStreams_w(const std::vector<StreamParams>& streams,
SdpType type,
std::string* error_desc) {
// Check for streams that have been removed.
bool ret = true;
for (StreamParamsVec::const_iterator it = local_streams_.begin();
it != local_streams_.end(); ++it) {
if (!GetStreamBySsrc(streams, it->first_ssrc())) {
if (!media_channel()->RemoveSendStream(it->first_ssrc())) {
std::ostringstream desc;
desc << "Failed to remove send stream with ssrc "
<< it->first_ssrc() << ".";
SafeSetError(desc.str(), error_desc);
ret = false;
}
}
}
// Check for new streams.
for (StreamParamsVec::const_iterator it = streams.begin();
it != streams.end(); ++it) {
if (!GetStreamBySsrc(local_streams_, it->first_ssrc())) {
if (media_channel()->AddSendStream(*it)) {
RTC_LOG(LS_INFO) << "Add send stream ssrc: " << it->ssrcs[0];
} else {
std::ostringstream desc;
desc << "Failed to add send stream ssrc: " << it->first_ssrc();
SafeSetError(desc.str(), error_desc);
ret = false;
}
}
}
local_streams_ = streams;
return ret;
}
bool BaseChannel::UpdateRemoteStreams_w(
const std::vector<StreamParams>& streams,
SdpType type,
std::string* error_desc) {
// Check for streams that have been removed.
bool ret = true;
for (StreamParamsVec::const_iterator it = remote_streams_.begin();
it != remote_streams_.end(); ++it) {
if (!GetStreamBySsrc(streams, it->first_ssrc())) {
if (!RemoveRecvStream_w(it->first_ssrc())) {
std::ostringstream desc;
desc << "Failed to remove remote stream with ssrc "
<< it->first_ssrc() << ".";
SafeSetError(desc.str(), error_desc);
ret = false;
}
}
}
// Check for new streams.
for (StreamParamsVec::const_iterator it = streams.begin();
it != streams.end(); ++it) {
if (!GetStreamBySsrc(remote_streams_, it->first_ssrc())) {
if (AddRecvStream_w(*it)) {
RTC_LOG(LS_INFO) << "Add remote ssrc: " << it->ssrcs[0];
} else {
std::ostringstream desc;
desc << "Failed to add remote stream ssrc: " << it->first_ssrc();
SafeSetError(desc.str(), error_desc);
ret = false;
}
}
}
remote_streams_ = streams;
return ret;
}
RtpHeaderExtensions BaseChannel::GetFilteredRtpHeaderExtensions(
const RtpHeaderExtensions& extensions) {
if (!rtp_dtls_transport_ ||
!rtp_dtls_transport_->crypto_options()
.enable_encrypted_rtp_header_extensions) {
RtpHeaderExtensions filtered;
auto pred = [](const webrtc::RtpExtension& extension) {
return !extension.encrypt;
};
std::copy_if(extensions.begin(), extensions.end(),
std::back_inserter(filtered), pred);
return filtered;
}
return webrtc::RtpExtension::FilterDuplicateNonEncrypted(extensions);
}
void BaseChannel::MaybeCacheRtpAbsSendTimeHeaderExtension_w(
const std::vector<webrtc::RtpExtension>& extensions) {
// Absolute Send Time extension id is used only with external auth,
// so do not bother searching for it and making asyncronious call to set
// something that is not used.
#if defined(ENABLE_EXTERNAL_AUTH)
const webrtc::RtpExtension* send_time_extension =
webrtc::RtpExtension::FindHeaderExtensionByUri(
extensions, webrtc::RtpExtension::kAbsSendTimeUri);
int rtp_abs_sendtime_extn_id =
send_time_extension ? send_time_extension->id : -1;
invoker_.AsyncInvoke<void>(
RTC_FROM_HERE, network_thread_,
Bind(&BaseChannel::CacheRtpAbsSendTimeHeaderExtension_n, this,
rtp_abs_sendtime_extn_id));
#endif
}
void BaseChannel::CacheRtpAbsSendTimeHeaderExtension_n(
int rtp_abs_sendtime_extn_id) {
if (sdes_transport_) {
sdes_transport_->CacheRtpAbsSendTimeHeaderExtension(
rtp_abs_sendtime_extn_id);
} else if (dtls_srtp_transport_) {
dtls_srtp_transport_->CacheRtpAbsSendTimeHeaderExtension(
rtp_abs_sendtime_extn_id);
} else {
RTC_LOG(LS_WARNING)
<< "Trying to cache the Absolute Send Time extension id "
"but the SRTP is not active.";
}
}
void BaseChannel::OnMessage(rtc::Message *pmsg) {
TRACE_EVENT0("webrtc", "BaseChannel::OnMessage");
switch (pmsg->message_id) {
case MSG_SEND_RTP_PACKET:
case MSG_SEND_RTCP_PACKET: {
RTC_DCHECK(network_thread_->IsCurrent());
SendPacketMessageData* data =
static_cast<SendPacketMessageData*>(pmsg->pdata);
bool rtcp = pmsg->message_id == MSG_SEND_RTCP_PACKET;
SendPacket(rtcp, &data->packet, data->options);
delete data;
break;
}
case MSG_FIRSTPACKETRECEIVED: {
SignalFirstPacketReceived(this);
break;
}
}
}
void BaseChannel::AddHandledPayloadType(int payload_type) {
rtp_transport_->AddHandledPayloadType(payload_type);
}
void BaseChannel::FlushRtcpMessages_n() {
// Flush all remaining RTCP messages. This should only be called in
// destructor.
RTC_DCHECK(network_thread_->IsCurrent());
rtc::MessageList rtcp_messages;
network_thread_->Clear(this, MSG_SEND_RTCP_PACKET, &rtcp_messages);
for (const auto& message : rtcp_messages) {
network_thread_->Send(RTC_FROM_HERE, this, MSG_SEND_RTCP_PACKET,
message.pdata);
}
}
void BaseChannel::SignalSentPacket_n(const rtc::SentPacket& sent_packet) {
RTC_DCHECK(network_thread_->IsCurrent());
invoker_.AsyncInvoke<void>(
RTC_FROM_HERE, worker_thread_,
rtc::Bind(&BaseChannel::SignalSentPacket_w, this, sent_packet));
}
void BaseChannel::SignalSentPacket_w(const rtc::SentPacket& sent_packet) {
RTC_DCHECK(worker_thread_->IsCurrent());
SignalSentPacket(sent_packet);
}
void BaseChannel::UpdateEncryptedHeaderExtensionIds(
cricket::ContentSource source,
const std::vector<int>& extension_ids) {
if (source == ContentSource::CS_LOCAL) {
cached_recv_extension_ids_ = std::move(extension_ids);
if (dtls_srtp_transport_) {
dtls_srtp_transport_->UpdateRecvEncryptedHeaderExtensionIds(
extension_ids);
}
} else {
cached_send_extension_ids_ = std::move(extension_ids);
if (dtls_srtp_transport_) {
dtls_srtp_transport_->UpdateSendEncryptedHeaderExtensionIds(
extension_ids);
}
}
}
void BaseChannel::ActivateRtcpMux() {
// We permanently activated RTCP muxing; signal that we no longer need
// the RTCP transport.
std::string debug_name =
transport_name_.empty()
? rtp_transport_->rtp_packet_transport()->transport_name()
: transport_name_;
RTC_LOG(LS_INFO) << "Enabling rtcp-mux for " << content_name()
<< "; no longer need RTCP transport for " << debug_name;
if (rtp_transport_->rtcp_packet_transport()) {
SetTransport_n(/*rtcp=*/true, nullptr, nullptr);
if (dtls_srtp_transport_) {
RTC_DCHECK(rtp_dtls_transport_);
dtls_srtp_transport_->SetDtlsTransports(rtp_dtls_transport_,
/*rtcp_dtls_transport_=*/nullptr);
} else {
rtp_transport_->SetRtcpPacketTransport(nullptr);
}
SignalRtcpMuxFullyActive(transport_name_);
}
UpdateWritableState_n();
}
VoiceChannel::VoiceChannel(rtc::Thread* worker_thread,
rtc::Thread* network_thread,
rtc::Thread* signaling_thread,
// TODO(nisse): Delete unused argument.
MediaEngineInterface* /* media_engine */,
std::unique_ptr<VoiceMediaChannel> media_channel,
const std::string& content_name,
bool rtcp_mux_required,
bool srtp_required)
: BaseChannel(worker_thread,
network_thread,
signaling_thread,
std::move(media_channel),
content_name,
rtcp_mux_required,
srtp_required) {}
VoiceChannel::~VoiceChannel() {
TRACE_EVENT0("webrtc", "VoiceChannel::~VoiceChannel");
// this can't be done in the base class, since it calls a virtual
DisableMedia_w();
Deinit();
}
bool VoiceChannel::SetAudioSend(uint32_t ssrc,
bool enable,
const AudioOptions* options,
AudioSource* source) {
return InvokeOnWorker<bool>(
RTC_FROM_HERE, Bind(&VoiceMediaChannel::SetAudioSend, media_channel(),
ssrc, enable, options, source));
}
// TODO(juberti): Handle early media the right way. We should get an explicit
// ringing message telling us to start playing local ringback, which we cancel
// if any early media actually arrives. For now, we do the opposite, which is
// to wait 1 second for early media, and start playing local ringback if none
// arrives.
void VoiceChannel::SetEarlyMedia(bool enable) {
if (enable) {
// Start the early media timeout
worker_thread()->PostDelayed(RTC_FROM_HERE, kEarlyMediaTimeout, this,
MSG_EARLYMEDIATIMEOUT);
} else {
// Stop the timeout if currently going.
worker_thread()->Clear(this, MSG_EARLYMEDIATIMEOUT);
}
}
bool VoiceChannel::GetStats(VoiceMediaInfo* stats) {
return InvokeOnWorker<bool>(RTC_FROM_HERE, Bind(&VoiceMediaChannel::GetStats,
media_channel(), stats));
}
void VoiceChannel::OnPacketReceived(bool rtcp,
rtc::CopyOnWriteBuffer* packet,
const rtc::PacketTime& packet_time) {
BaseChannel::OnPacketReceived(rtcp, packet, packet_time);
// Set a flag when we've received an RTP packet. If we're waiting for early
// media, this will disable the timeout.
if (!received_media_ && !rtcp) {
received_media_ = true;
}
}
void BaseChannel::UpdateMediaSendRecvState() {
RTC_DCHECK(network_thread_->IsCurrent());
invoker_.AsyncInvoke<void>(
RTC_FROM_HERE, worker_thread_,
Bind(&BaseChannel::UpdateMediaSendRecvState_w, this));
}
void VoiceChannel::UpdateMediaSendRecvState_w() {
// Render incoming data if we're the active call, and we have the local
// content. We receive data on the default channel and multiplexed streams.
bool recv = IsReadyToReceiveMedia_w();
media_channel()->SetPlayout(recv);
// Send outgoing data if we're the active call, we have the remote content,
// and we have had some form of connectivity.
bool send = IsReadyToSendMedia_w();
media_channel()->SetSend(send);
RTC_LOG(LS_INFO) << "Changing voice state, recv=" << recv << " send=" << send;
}
bool VoiceChannel::SetLocalContent_w(const MediaContentDescription* content,
SdpType type,
std::string* error_desc) {
TRACE_EVENT0("webrtc", "VoiceChannel::SetLocalContent_w");
RTC_DCHECK_RUN_ON(worker_thread());
RTC_LOG(LS_INFO) << "Setting local voice description";
RTC_DCHECK(content);
if (!content) {
SafeSetError("Can't find audio content in local description.", error_desc);
return false;
}
const AudioContentDescription* audio = content->as_audio();
RtpHeaderExtensions rtp_header_extensions =
GetFilteredRtpHeaderExtensions(audio->rtp_header_extensions());
if (!SetRtpTransportParameters(content, type, CS_LOCAL, rtp_header_extensions,
error_desc)) {
return false;
}
AudioRecvParameters recv_params = last_recv_params_;
RtpParametersFromMediaDescription(audio, rtp_header_extensions, &recv_params);
if (!media_channel()->SetRecvParameters(recv_params)) {
SafeSetError("Failed to set local audio description recv parameters.",
error_desc);
return false;
}
for (const AudioCodec& codec : audio->codecs()) {
AddHandledPayloadType(codec.id);
}
last_recv_params_ = recv_params;
// TODO(pthatcher): Move local streams into AudioSendParameters, and
// only give it to the media channel once we have a remote
// description too (without a remote description, we won't be able
// to send them anyway).
if (!UpdateLocalStreams_w(audio->streams(), type, error_desc)) {
SafeSetError("Failed to set local audio description streams.", error_desc);
return false;
}
set_local_content_direction(content->direction());
UpdateMediaSendRecvState_w();
return true;
}
bool VoiceChannel::SetRemoteContent_w(const MediaContentDescription* content,
SdpType type,
std::string* error_desc) {
TRACE_EVENT0("webrtc", "VoiceChannel::SetRemoteContent_w");
RTC_DCHECK_RUN_ON(worker_thread());
RTC_LOG(LS_INFO) << "Setting remote voice description";
RTC_DCHECK(content);
if (!content) {
SafeSetError("Can't find audio content in remote description.", error_desc);
return false;
}
const AudioContentDescription* audio = content->as_audio();
RtpHeaderExtensions rtp_header_extensions =
GetFilteredRtpHeaderExtensions(audio->rtp_header_extensions());
if (!SetRtpTransportParameters(content, type, CS_REMOTE,
rtp_header_extensions, error_desc)) {
return false;
}
AudioSendParameters send_params = last_send_params_;
RtpSendParametersFromMediaDescription(audio, rtp_header_extensions,
&send_params);
bool parameters_applied = media_channel()->SetSendParameters(send_params);
if (!parameters_applied) {
SafeSetError("Failed to set remote audio description send parameters.",
error_desc);
return false;
}
last_send_params_ = send_params;
// TODO(pthatcher): Move remote streams into AudioRecvParameters,
// and only give it to the media channel once we have a local
// description too (without a local description, we won't be able to
// recv them anyway).
if (!UpdateRemoteStreams_w(audio->streams(), type, error_desc)) {
SafeSetError("Failed to set remote audio description streams.", error_desc);
return false;
}
if (audio->rtp_header_extensions_set()) {
MaybeCacheRtpAbsSendTimeHeaderExtension_w(rtp_header_extensions);
}
set_remote_content_direction(content->direction());
UpdateMediaSendRecvState_w();
return true;
}
void VoiceChannel::HandleEarlyMediaTimeout() {
// This occurs on the main thread, not the worker thread.
if (!received_media_) {
RTC_LOG(LS_INFO) << "No early media received before timeout";
SignalEarlyMediaTimeout(this);
}
}
void VoiceChannel::OnMessage(rtc::Message *pmsg) {
switch (pmsg->message_id) {
case MSG_EARLYMEDIATIMEOUT:
HandleEarlyMediaTimeout();
break;
default:
BaseChannel::OnMessage(pmsg);
break;
}
}
VideoChannel::VideoChannel(rtc::Thread* worker_thread,
rtc::Thread* network_thread,
rtc::Thread* signaling_thread,
std::unique_ptr<VideoMediaChannel> media_channel,
const std::string& content_name,
bool rtcp_mux_required,
bool srtp_required)
: BaseChannel(worker_thread,
network_thread,
signaling_thread,
std::move(media_channel),
content_name,
rtcp_mux_required,
srtp_required) {}
VideoChannel::~VideoChannel() {
TRACE_EVENT0("webrtc", "VideoChannel::~VideoChannel");
// this can't be done in the base class, since it calls a virtual
DisableMedia_w();
Deinit();
}
void VideoChannel::UpdateMediaSendRecvState_w() {
// Send outgoing data if we're the active call, we have the remote content,
// and we have had some form of connectivity.
bool send = IsReadyToSendMedia_w();
if (!media_channel()->SetSend(send)) {
RTC_LOG(LS_ERROR) << "Failed to SetSend on video channel";
// TODO(gangji): Report error back to server.
}
RTC_LOG(LS_INFO) << "Changing video state, send=" << send;
}
void VideoChannel::FillBitrateInfo(BandwidthEstimationInfo* bwe_info) {
InvokeOnWorker<void>(RTC_FROM_HERE, Bind(&VideoMediaChannel::FillBitrateInfo,
media_channel(), bwe_info));
}
bool VideoChannel::GetStats(VideoMediaInfo* stats) {
return InvokeOnWorker<bool>(RTC_FROM_HERE, Bind(&VideoMediaChannel::GetStats,
media_channel(), stats));
}
bool VideoChannel::SetLocalContent_w(const MediaContentDescription* content,
SdpType type,
std::string* error_desc) {
TRACE_EVENT0("webrtc", "VideoChannel::SetLocalContent_w");
RTC_DCHECK_RUN_ON(worker_thread());
RTC_LOG(LS_INFO) << "Setting local video description";
RTC_DCHECK(content);
if (!content) {
SafeSetError("Can't find video content in local description.", error_desc);
return false;
}
const VideoContentDescription* video = content->as_video();
RtpHeaderExtensions rtp_header_extensions =
GetFilteredRtpHeaderExtensions(video->rtp_header_extensions());
if (!SetRtpTransportParameters(content, type, CS_LOCAL, rtp_header_extensions,
error_desc)) {
return false;
}
VideoRecvParameters recv_params = last_recv_params_;
RtpParametersFromMediaDescription(video, rtp_header_extensions, &recv_params);
if (!media_channel()->SetRecvParameters(recv_params)) {
SafeSetError("Failed to set local video description recv parameters.",
error_desc);
return false;
}
for (const VideoCodec& codec : video->codecs()) {
AddHandledPayloadType(codec.id);
}
last_recv_params_ = recv_params;
// TODO(pthatcher): Move local streams into VideoSendParameters, and
// only give it to the media channel once we have a remote
// description too (without a remote description, we won't be able
// to send them anyway).
if (!UpdateLocalStreams_w(video->streams(), type, error_desc)) {
SafeSetError("Failed to set local video description streams.", error_desc);
return false;
}
set_local_content_direction(content->direction());
UpdateMediaSendRecvState_w();
return true;
}
bool VideoChannel::SetRemoteContent_w(const MediaContentDescription* content,
SdpType type,
std::string* error_desc) {
TRACE_EVENT0("webrtc", "VideoChannel::SetRemoteContent_w");
RTC_DCHECK_RUN_ON(worker_thread());
RTC_LOG(LS_INFO) << "Setting remote video description";
RTC_DCHECK(content);
if (!content) {
SafeSetError("Can't find video content in remote description.", error_desc);
return false;
}
const VideoContentDescription* video = content->as_video();
RtpHeaderExtensions rtp_header_extensions =
GetFilteredRtpHeaderExtensions(video->rtp_header_extensions());
if (!SetRtpTransportParameters(content, type, CS_REMOTE,
rtp_header_extensions, error_desc)) {
return false;
}
VideoSendParameters send_params = last_send_params_;
RtpSendParametersFromMediaDescription(video, rtp_header_extensions,
&send_params);
if (video->conference_mode()) {
send_params.conference_mode = true;
}
bool parameters_applied = media_channel()->SetSendParameters(send_params);
if (!parameters_applied) {
SafeSetError("Failed to set remote video description send parameters.",
error_desc);
return false;
}
last_send_params_ = send_params;
// TODO(pthatcher): Move remote streams into VideoRecvParameters,
// and only give it to the media channel once we have a local
// description too (without a local description, we won't be able to
// recv them anyway).
if (!UpdateRemoteStreams_w(video->streams(), type, error_desc)) {
SafeSetError("Failed to set remote video description streams.", error_desc);
return false;
}
if (video->rtp_header_extensions_set()) {
MaybeCacheRtpAbsSendTimeHeaderExtension_w(rtp_header_extensions);
}
set_remote_content_direction(content->direction());
UpdateMediaSendRecvState_w();
return true;
}
RtpDataChannel::RtpDataChannel(rtc::Thread* worker_thread,
rtc::Thread* network_thread,
rtc::Thread* signaling_thread,
std::unique_ptr<DataMediaChannel> media_channel,
const std::string& content_name,
bool rtcp_mux_required,
bool srtp_required)
: BaseChannel(worker_thread,
network_thread,
signaling_thread,
std::move(media_channel),
content_name,
rtcp_mux_required,
srtp_required) {}
RtpDataChannel::~RtpDataChannel() {
TRACE_EVENT0("webrtc", "RtpDataChannel::~RtpDataChannel");
// this can't be done in the base class, since it calls a virtual
DisableMedia_w();
Deinit();
}
void RtpDataChannel::Init_w(
DtlsTransportInternal* rtp_dtls_transport,
DtlsTransportInternal* rtcp_dtls_transport,
rtc::PacketTransportInternal* rtp_packet_transport,
rtc::PacketTransportInternal* rtcp_packet_transport) {
BaseChannel::Init_w(rtp_dtls_transport, rtcp_dtls_transport,
rtp_packet_transport, rtcp_packet_transport);
media_channel()->SignalDataReceived.connect(this,
&RtpDataChannel::OnDataReceived);
media_channel()->SignalReadyToSend.connect(
this, &RtpDataChannel::OnDataChannelReadyToSend);
}
void RtpDataChannel::Init_w(webrtc::RtpTransportInternal* rtp_transport) {
BaseChannel::Init_w(rtp_transport);
media_channel()->SignalDataReceived.connect(this,
&RtpDataChannel::OnDataReceived);
media_channel()->SignalReadyToSend.connect(
this, &RtpDataChannel::OnDataChannelReadyToSend);
}
bool RtpDataChannel::SendData(const SendDataParams& params,
const rtc::CopyOnWriteBuffer& payload,
SendDataResult* result) {
return InvokeOnWorker<bool>(
RTC_FROM_HERE, Bind(&DataMediaChannel::SendData, media_channel(), params,
payload, result));
}
bool RtpDataChannel::CheckDataChannelTypeFromContent(
const DataContentDescription* content,
std::string* error_desc) {
bool is_sctp = ((content->protocol() == kMediaProtocolSctp) ||
(content->protocol() == kMediaProtocolDtlsSctp));
// It's been set before, but doesn't match. That's bad.
if (is_sctp) {
SafeSetError("Data channel type mismatch. Expected RTP, got SCTP.",
error_desc);
return false;
}
return true;
}
bool RtpDataChannel::SetLocalContent_w(const MediaContentDescription* content,
SdpType type,
std::string* error_desc) {
TRACE_EVENT0("webrtc", "RtpDataChannel::SetLocalContent_w");
RTC_DCHECK_RUN_ON(worker_thread());
RTC_LOG(LS_INFO) << "Setting local data description";
RTC_DCHECK(content);
if (!content) {
SafeSetError("Can't find data content in local description.", error_desc);
return false;
}
const DataContentDescription* data = content->as_data();
if (!CheckDataChannelTypeFromContent(data, error_desc)) {
return false;
}
RtpHeaderExtensions rtp_header_extensions =
GetFilteredRtpHeaderExtensions(data->rtp_header_extensions());
if (!SetRtpTransportParameters(content, type, CS_LOCAL, rtp_header_extensions,
error_desc)) {
return false;
}
DataRecvParameters recv_params = last_recv_params_;
RtpParametersFromMediaDescription(data, rtp_header_extensions, &recv_params);
if (!media_channel()->SetRecvParameters(recv_params)) {
SafeSetError("Failed to set remote data description recv parameters.",
error_desc);
return false;
}
for (const DataCodec& codec : data->codecs()) {
AddHandledPayloadType(codec.id);
}
last_recv_params_ = recv_params;
// TODO(pthatcher): Move local streams into DataSendParameters, and
// only give it to the media channel once we have a remote
// description too (without a remote description, we won't be able
// to send them anyway).
if (!UpdateLocalStreams_w(data->streams(), type, error_desc)) {
SafeSetError("Failed to set local data description streams.", error_desc);
return false;
}
set_local_content_direction(content->direction());
UpdateMediaSendRecvState_w();
return true;
}
bool RtpDataChannel::SetRemoteContent_w(const MediaContentDescription* content,
SdpType type,
std::string* error_desc) {
TRACE_EVENT0("webrtc", "RtpDataChannel::SetRemoteContent_w");
RTC_DCHECK_RUN_ON(worker_thread());
RTC_LOG(LS_INFO) << "Setting remote data description";
RTC_DCHECK(content);
if (!content) {
SafeSetError("Can't find data content in remote description.", error_desc);
return false;
}
const DataContentDescription* data = content->as_data();
// If the remote data doesn't have codecs, it must be empty, so ignore it.
if (!data->has_codecs()) {
return true;
}
if (!CheckDataChannelTypeFromContent(data, error_desc)) {
return false;
}
RtpHeaderExtensions rtp_header_extensions =
GetFilteredRtpHeaderExtensions(data->rtp_header_extensions());
RTC_LOG(LS_INFO) << "Setting remote data description";
if (!SetRtpTransportParameters(content, type, CS_REMOTE,
rtp_header_extensions, error_desc)) {
return false;
}
DataSendParameters send_params = last_send_params_;
RtpSendParametersFromMediaDescription<DataCodec>(data, rtp_header_extensions,
&send_params);
if (!media_channel()->SetSendParameters(send_params)) {
SafeSetError("Failed to set remote data description send parameters.",
error_desc);
return false;
}
last_send_params_ = send_params;
// TODO(pthatcher): Move remote streams into DataRecvParameters,
// and only give it to the media channel once we have a local
// description too (without a local description, we won't be able to
// recv them anyway).
if (!UpdateRemoteStreams_w(data->streams(), type, error_desc)) {
SafeSetError("Failed to set remote data description streams.",
error_desc);
return false;
}
set_remote_content_direction(content->direction());
UpdateMediaSendRecvState_w();
return true;
}
void RtpDataChannel::UpdateMediaSendRecvState_w() {
// Render incoming data if we're the active call, and we have the local
// content. We receive data on the default channel and multiplexed streams.
bool recv = IsReadyToReceiveMedia_w();
if (!media_channel()->SetReceive(recv)) {
RTC_LOG(LS_ERROR) << "Failed to SetReceive on data channel";
}
// Send outgoing data if we're the active call, we have the remote content,
// and we have had some form of connectivity.
bool send = IsReadyToSendMedia_w();
if (!media_channel()->SetSend(send)) {
RTC_LOG(LS_ERROR) << "Failed to SetSend on data channel";
}
// Trigger SignalReadyToSendData asynchronously.
OnDataChannelReadyToSend(send);
RTC_LOG(LS_INFO) << "Changing data state, recv=" << recv << " send=" << send;
}
void RtpDataChannel::OnMessage(rtc::Message* pmsg) {
switch (pmsg->message_id) {
case MSG_READYTOSENDDATA: {
DataChannelReadyToSendMessageData* data =
static_cast<DataChannelReadyToSendMessageData*>(pmsg->pdata);
ready_to_send_data_ = data->data();
SignalReadyToSendData(ready_to_send_data_);
delete data;
break;
}
case MSG_DATARECEIVED: {
DataReceivedMessageData* data =
static_cast<DataReceivedMessageData*>(pmsg->pdata);
SignalDataReceived(data->params, data->payload);
delete data;
break;
}
default:
BaseChannel::OnMessage(pmsg);
break;
}
}
void RtpDataChannel::OnDataReceived(const ReceiveDataParams& params,
const char* data,
size_t len) {
DataReceivedMessageData* msg = new DataReceivedMessageData(
params, data, len);
signaling_thread()->Post(RTC_FROM_HERE, this, MSG_DATARECEIVED, msg);
}
void RtpDataChannel::OnDataChannelReadyToSend(bool writable) {
// This is usded for congestion control to indicate that the stream is ready
// to send by the MediaChannel, as opposed to OnReadyToSend, which indicates
// that the transport channel is ready.
signaling_thread()->Post(RTC_FROM_HERE, this, MSG_READYTOSENDDATA,
new DataChannelReadyToSendMessageData(writable));
}
} // namespace cricket
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