| /* |
| * Copyright 2020 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 "pc/rtp_transmission_manager.h" |
| |
| #include <type_traits> |
| #include <utility> |
| |
| #include "absl/types/optional.h" |
| #include "api/peer_connection_interface.h" |
| #include "api/rtp_transceiver_direction.h" |
| #include "pc/audio_rtp_receiver.h" |
| #include "pc/channel_interface.h" |
| #include "pc/stats_collector_interface.h" |
| #include "pc/video_rtp_receiver.h" |
| #include "rtc_base/checks.h" |
| #include "rtc_base/helpers.h" |
| #include "rtc_base/logging.h" |
| |
| namespace webrtc { |
| |
| namespace { |
| |
| static const char kDefaultAudioSenderId[] = "defaulta0"; |
| static const char kDefaultVideoSenderId[] = "defaultv0"; |
| |
| } // namespace |
| |
| RtpTransmissionManager::RtpTransmissionManager( |
| bool is_unified_plan, |
| ConnectionContext* context, |
| UsagePattern* usage_pattern, |
| PeerConnectionObserver* observer, |
| StatsCollectorInterface* stats, |
| std::function<void()> on_negotiation_needed) |
| : is_unified_plan_(is_unified_plan), |
| context_(context), |
| usage_pattern_(usage_pattern), |
| observer_(observer), |
| stats_(stats), |
| on_negotiation_needed_(on_negotiation_needed), |
| weak_ptr_factory_(this) {} |
| |
| void RtpTransmissionManager::Close() { |
| closed_ = true; |
| observer_ = nullptr; |
| } |
| |
| // Implementation of SetStreamsObserver |
| void RtpTransmissionManager::OnSetStreams() { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| if (IsUnifiedPlan()) |
| OnNegotiationNeeded(); |
| } |
| |
| // Function to call back to the PeerConnection when negotiation is needed |
| void RtpTransmissionManager::OnNegotiationNeeded() { |
| on_negotiation_needed_(); |
| } |
| |
| // Function that returns the currently valid observer |
| PeerConnectionObserver* RtpTransmissionManager::Observer() const { |
| RTC_DCHECK(!closed_); |
| RTC_DCHECK(observer_); |
| return observer_; |
| } |
| |
| cricket::VoiceMediaChannel* RtpTransmissionManager::voice_media_channel() |
| const { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| RTC_DCHECK(!IsUnifiedPlan()); |
| auto* voice_channel = GetAudioTransceiver()->internal()->channel(); |
| if (voice_channel) { |
| return voice_channel->voice_media_channel(); |
| } else { |
| return nullptr; |
| } |
| } |
| |
| cricket::VideoMediaChannel* RtpTransmissionManager::video_media_channel() |
| const { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| RTC_DCHECK(!IsUnifiedPlan()); |
| auto* video_channel = GetVideoTransceiver()->internal()->channel(); |
| if (video_channel) { |
| return video_channel->video_media_channel(); |
| } else { |
| return nullptr; |
| } |
| } |
| |
| RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>> |
| RtpTransmissionManager::AddTrack( |
| rtc::scoped_refptr<MediaStreamTrackInterface> track, |
| const std::vector<std::string>& stream_ids) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| |
| return (IsUnifiedPlan() ? AddTrackUnifiedPlan(track, stream_ids) |
| : AddTrackPlanB(track, stream_ids)); |
| } |
| |
| RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>> |
| RtpTransmissionManager::AddTrackPlanB( |
| rtc::scoped_refptr<MediaStreamTrackInterface> track, |
| const std::vector<std::string>& stream_ids) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| if (stream_ids.size() > 1u) { |
| LOG_AND_RETURN_ERROR(RTCErrorType::UNSUPPORTED_OPERATION, |
| "AddTrack with more than one stream is not " |
| "supported with Plan B semantics."); |
| } |
| std::vector<std::string> adjusted_stream_ids = stream_ids; |
| if (adjusted_stream_ids.empty()) { |
| adjusted_stream_ids.push_back(rtc::CreateRandomUuid()); |
| } |
| cricket::MediaType media_type = |
| (track->kind() == MediaStreamTrackInterface::kAudioKind |
| ? cricket::MEDIA_TYPE_AUDIO |
| : cricket::MEDIA_TYPE_VIDEO); |
| auto new_sender = |
| CreateSender(media_type, track->id(), track, adjusted_stream_ids, {}); |
| if (track->kind() == MediaStreamTrackInterface::kAudioKind) { |
| new_sender->internal()->SetMediaChannel(voice_media_channel()); |
| GetAudioTransceiver()->internal()->AddSender(new_sender); |
| const RtpSenderInfo* sender_info = |
| FindSenderInfo(local_audio_sender_infos_, |
| new_sender->internal()->stream_ids()[0], track->id()); |
| if (sender_info) { |
| new_sender->internal()->SetSsrc(sender_info->first_ssrc); |
| } |
| } else { |
| RTC_DCHECK_EQ(MediaStreamTrackInterface::kVideoKind, track->kind()); |
| new_sender->internal()->SetMediaChannel(video_media_channel()); |
| GetVideoTransceiver()->internal()->AddSender(new_sender); |
| const RtpSenderInfo* sender_info = |
| FindSenderInfo(local_video_sender_infos_, |
| new_sender->internal()->stream_ids()[0], track->id()); |
| if (sender_info) { |
| new_sender->internal()->SetSsrc(sender_info->first_ssrc); |
| } |
| } |
| return rtc::scoped_refptr<RtpSenderInterface>(new_sender); |
| } |
| |
| RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>> |
| RtpTransmissionManager::AddTrackUnifiedPlan( |
| rtc::scoped_refptr<MediaStreamTrackInterface> track, |
| const std::vector<std::string>& stream_ids) { |
| auto transceiver = FindFirstTransceiverForAddedTrack(track); |
| if (transceiver) { |
| RTC_LOG(LS_INFO) << "Reusing an existing " |
| << cricket::MediaTypeToString(transceiver->media_type()) |
| << " transceiver for AddTrack."; |
| if (transceiver->stopping()) { |
| LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER, |
| "The existing transceiver is stopping."); |
| } |
| |
| if (transceiver->direction() == RtpTransceiverDirection::kRecvOnly) { |
| transceiver->internal()->set_direction( |
| RtpTransceiverDirection::kSendRecv); |
| } else if (transceiver->direction() == RtpTransceiverDirection::kInactive) { |
| transceiver->internal()->set_direction( |
| RtpTransceiverDirection::kSendOnly); |
| } |
| transceiver->sender()->SetTrack(track.get()); |
| transceiver->internal()->sender_internal()->set_stream_ids(stream_ids); |
| transceiver->internal()->set_reused_for_addtrack(true); |
| } else { |
| cricket::MediaType media_type = |
| (track->kind() == MediaStreamTrackInterface::kAudioKind |
| ? cricket::MEDIA_TYPE_AUDIO |
| : cricket::MEDIA_TYPE_VIDEO); |
| RTC_LOG(LS_INFO) << "Adding " << cricket::MediaTypeToString(media_type) |
| << " transceiver in response to a call to AddTrack."; |
| std::string sender_id = track->id(); |
| // Avoid creating a sender with an existing ID by generating a random ID. |
| // This can happen if this is the second time AddTrack has created a sender |
| // for this track. |
| if (FindSenderById(sender_id)) { |
| sender_id = rtc::CreateRandomUuid(); |
| } |
| auto sender = CreateSender(media_type, sender_id, track, stream_ids, {}); |
| auto receiver = CreateReceiver(media_type, rtc::CreateRandomUuid()); |
| transceiver = CreateAndAddTransceiver(sender, receiver); |
| transceiver->internal()->set_created_by_addtrack(true); |
| transceiver->internal()->set_direction(RtpTransceiverDirection::kSendRecv); |
| } |
| return transceiver->sender(); |
| } |
| |
| rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>> |
| RtpTransmissionManager::CreateSender( |
| cricket::MediaType media_type, |
| const std::string& id, |
| rtc::scoped_refptr<MediaStreamTrackInterface> track, |
| const std::vector<std::string>& stream_ids, |
| const std::vector<RtpEncodingParameters>& send_encodings) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>> sender; |
| if (media_type == cricket::MEDIA_TYPE_AUDIO) { |
| RTC_DCHECK(!track || |
| (track->kind() == MediaStreamTrackInterface::kAudioKind)); |
| sender = RtpSenderProxyWithInternal<RtpSenderInternal>::Create( |
| signaling_thread(), |
| AudioRtpSender::Create(worker_thread(), id, stats_, this)); |
| NoteUsageEvent(UsageEvent::AUDIO_ADDED); |
| } else { |
| RTC_DCHECK_EQ(media_type, cricket::MEDIA_TYPE_VIDEO); |
| RTC_DCHECK(!track || |
| (track->kind() == MediaStreamTrackInterface::kVideoKind)); |
| sender = RtpSenderProxyWithInternal<RtpSenderInternal>::Create( |
| signaling_thread(), VideoRtpSender::Create(worker_thread(), id, this)); |
| NoteUsageEvent(UsageEvent::VIDEO_ADDED); |
| } |
| bool set_track_succeeded = sender->SetTrack(track.get()); |
| RTC_DCHECK(set_track_succeeded); |
| sender->internal()->set_stream_ids(stream_ids); |
| sender->internal()->set_init_send_encodings(send_encodings); |
| return sender; |
| } |
| |
| rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>> |
| RtpTransmissionManager::CreateReceiver(cricket::MediaType media_type, |
| const std::string& receiver_id) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>> |
| receiver; |
| if (media_type == cricket::MEDIA_TYPE_AUDIO) { |
| receiver = RtpReceiverProxyWithInternal<RtpReceiverInternal>::Create( |
| signaling_thread(), worker_thread(), |
| rtc::make_ref_counted<AudioRtpReceiver>(worker_thread(), receiver_id, |
| std::vector<std::string>({}), |
| IsUnifiedPlan())); |
| NoteUsageEvent(UsageEvent::AUDIO_ADDED); |
| } else { |
| RTC_DCHECK_EQ(media_type, cricket::MEDIA_TYPE_VIDEO); |
| receiver = RtpReceiverProxyWithInternal<RtpReceiverInternal>::Create( |
| signaling_thread(), worker_thread(), |
| rtc::make_ref_counted<VideoRtpReceiver>(worker_thread(), receiver_id, |
| std::vector<std::string>({}))); |
| NoteUsageEvent(UsageEvent::VIDEO_ADDED); |
| } |
| return receiver; |
| } |
| |
| rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>> |
| RtpTransmissionManager::CreateAndAddTransceiver( |
| rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>> sender, |
| rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>> |
| receiver) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| // Ensure that the new sender does not have an ID that is already in use by |
| // another sender. |
| // Allow receiver IDs to conflict since those come from remote SDP (which |
| // could be invalid, but should not cause a crash). |
| RTC_DCHECK(!FindSenderById(sender->id())); |
| auto transceiver = RtpTransceiverProxyWithInternal<RtpTransceiver>::Create( |
| signaling_thread(), |
| rtc::make_ref_counted<RtpTransceiver>( |
| sender, receiver, context_, |
| sender->media_type() == cricket::MEDIA_TYPE_AUDIO |
| ? media_engine()->voice().GetRtpHeaderExtensions() |
| : media_engine()->video().GetRtpHeaderExtensions(), |
| [this_weak_ptr = weak_ptr_factory_.GetWeakPtr()]() { |
| if (this_weak_ptr) { |
| this_weak_ptr->OnNegotiationNeeded(); |
| } |
| })); |
| transceivers()->Add(transceiver); |
| return transceiver; |
| } |
| |
| rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>> |
| RtpTransmissionManager::FindFirstTransceiverForAddedTrack( |
| rtc::scoped_refptr<MediaStreamTrackInterface> track) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| RTC_DCHECK(track); |
| for (auto transceiver : transceivers()->List()) { |
| if (!transceiver->sender()->track() && |
| cricket::MediaTypeToString(transceiver->media_type()) == |
| track->kind() && |
| !transceiver->internal()->has_ever_been_used_to_send() && |
| !transceiver->stopped()) { |
| return transceiver; |
| } |
| } |
| return nullptr; |
| } |
| |
| std::vector<rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>>> |
| RtpTransmissionManager::GetSendersInternal() const { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| std::vector<rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>>> |
| all_senders; |
| for (const auto& transceiver : transceivers_.List()) { |
| if (IsUnifiedPlan() && transceiver->internal()->stopped()) |
| continue; |
| |
| auto senders = transceiver->internal()->senders(); |
| all_senders.insert(all_senders.end(), senders.begin(), senders.end()); |
| } |
| return all_senders; |
| } |
| |
| std::vector< |
| rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>>> |
| RtpTransmissionManager::GetReceiversInternal() const { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| std::vector< |
| rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>>> |
| all_receivers; |
| for (const auto& transceiver : transceivers_.List()) { |
| if (IsUnifiedPlan() && transceiver->internal()->stopped()) |
| continue; |
| |
| auto receivers = transceiver->internal()->receivers(); |
| all_receivers.insert(all_receivers.end(), receivers.begin(), |
| receivers.end()); |
| } |
| return all_receivers; |
| } |
| |
| rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>> |
| RtpTransmissionManager::GetAudioTransceiver() const { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| // This method only works with Plan B SDP, where there is a single |
| // audio/video transceiver. |
| RTC_DCHECK(!IsUnifiedPlan()); |
| for (auto transceiver : transceivers_.List()) { |
| if (transceiver->media_type() == cricket::MEDIA_TYPE_AUDIO) { |
| return transceiver; |
| } |
| } |
| RTC_DCHECK_NOTREACHED(); |
| return nullptr; |
| } |
| |
| rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>> |
| RtpTransmissionManager::GetVideoTransceiver() const { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| // This method only works with Plan B SDP, where there is a single |
| // audio/video transceiver. |
| RTC_DCHECK(!IsUnifiedPlan()); |
| for (auto transceiver : transceivers_.List()) { |
| if (transceiver->media_type() == cricket::MEDIA_TYPE_VIDEO) { |
| return transceiver; |
| } |
| } |
| RTC_DCHECK_NOTREACHED(); |
| return nullptr; |
| } |
| |
| void RtpTransmissionManager::AddAudioTrack(AudioTrackInterface* track, |
| MediaStreamInterface* stream) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| RTC_DCHECK(track); |
| RTC_DCHECK(stream); |
| auto sender = FindSenderForTrack(track); |
| if (sender) { |
| // We already have a sender for this track, so just change the stream_id |
| // so that it's correct in the next call to CreateOffer. |
| sender->internal()->set_stream_ids({stream->id()}); |
| return; |
| } |
| |
| // Normal case; we've never seen this track before. |
| auto new_sender = CreateSender(cricket::MEDIA_TYPE_AUDIO, track->id(), |
| rtc::scoped_refptr<AudioTrackInterface>(track), |
| {stream->id()}, {}); |
| new_sender->internal()->SetMediaChannel(voice_media_channel()); |
| GetAudioTransceiver()->internal()->AddSender(new_sender); |
| // If the sender has already been configured in SDP, we call SetSsrc, |
| // which will connect the sender to the underlying transport. This can |
| // occur if a local session description that contains the ID of the sender |
| // is set before AddStream is called. It can also occur if the local |
| // session description is not changed and RemoveStream is called, and |
| // later AddStream is called again with the same stream. |
| const RtpSenderInfo* sender_info = |
| FindSenderInfo(local_audio_sender_infos_, stream->id(), track->id()); |
| if (sender_info) { |
| new_sender->internal()->SetSsrc(sender_info->first_ssrc); |
| } |
| } |
| |
| // TODO(deadbeef): Don't destroy RtpSenders here; they should be kept around |
| // indefinitely, when we have unified plan SDP. |
| void RtpTransmissionManager::RemoveAudioTrack(AudioTrackInterface* track, |
| MediaStreamInterface* stream) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| RTC_DCHECK(!IsUnifiedPlan()); |
| auto sender = FindSenderForTrack(track); |
| if (!sender) { |
| RTC_LOG(LS_WARNING) << "RtpSender for track with id " << track->id() |
| << " doesn't exist."; |
| return; |
| } |
| GetAudioTransceiver()->internal()->RemoveSender(sender.get()); |
| } |
| |
| void RtpTransmissionManager::AddVideoTrack(VideoTrackInterface* track, |
| MediaStreamInterface* stream) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| RTC_DCHECK(track); |
| RTC_DCHECK(stream); |
| auto sender = FindSenderForTrack(track); |
| if (sender) { |
| // We already have a sender for this track, so just change the stream_id |
| // so that it's correct in the next call to CreateOffer. |
| sender->internal()->set_stream_ids({stream->id()}); |
| return; |
| } |
| |
| // Normal case; we've never seen this track before. |
| auto new_sender = CreateSender(cricket::MEDIA_TYPE_VIDEO, track->id(), |
| rtc::scoped_refptr<VideoTrackInterface>(track), |
| {stream->id()}, {}); |
| new_sender->internal()->SetMediaChannel(video_media_channel()); |
| GetVideoTransceiver()->internal()->AddSender(new_sender); |
| const RtpSenderInfo* sender_info = |
| FindSenderInfo(local_video_sender_infos_, stream->id(), track->id()); |
| if (sender_info) { |
| new_sender->internal()->SetSsrc(sender_info->first_ssrc); |
| } |
| } |
| |
| void RtpTransmissionManager::RemoveVideoTrack(VideoTrackInterface* track, |
| MediaStreamInterface* stream) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| RTC_DCHECK(!IsUnifiedPlan()); |
| auto sender = FindSenderForTrack(track); |
| if (!sender) { |
| RTC_LOG(LS_WARNING) << "RtpSender for track with id " << track->id() |
| << " doesn't exist."; |
| return; |
| } |
| GetVideoTransceiver()->internal()->RemoveSender(sender.get()); |
| } |
| |
| void RtpTransmissionManager::CreateAudioReceiver( |
| MediaStreamInterface* stream, |
| const RtpSenderInfo& remote_sender_info) { |
| RTC_DCHECK(!closed_); |
| std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams; |
| streams.push_back(rtc::scoped_refptr<MediaStreamInterface>(stream)); |
| // TODO(https://crbug.com/webrtc/9480): When we remove remote_streams(), use |
| // the constructor taking stream IDs instead. |
| auto audio_receiver = rtc::make_ref_counted<AudioRtpReceiver>( |
| worker_thread(), remote_sender_info.sender_id, streams, IsUnifiedPlan(), |
| voice_media_channel()); |
| if (remote_sender_info.sender_id == kDefaultAudioSenderId) { |
| audio_receiver->SetupUnsignaledMediaChannel(); |
| } else { |
| audio_receiver->SetupMediaChannel(remote_sender_info.first_ssrc); |
| } |
| |
| auto receiver = RtpReceiverProxyWithInternal<RtpReceiverInternal>::Create( |
| signaling_thread(), worker_thread(), std::move(audio_receiver)); |
| GetAudioTransceiver()->internal()->AddReceiver(receiver); |
| Observer()->OnAddTrack(receiver, streams); |
| NoteUsageEvent(UsageEvent::AUDIO_ADDED); |
| } |
| |
| void RtpTransmissionManager::CreateVideoReceiver( |
| MediaStreamInterface* stream, |
| const RtpSenderInfo& remote_sender_info) { |
| RTC_DCHECK(!closed_); |
| std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams; |
| streams.push_back(rtc::scoped_refptr<MediaStreamInterface>(stream)); |
| // TODO(https://crbug.com/webrtc/9480): When we remove remote_streams(), use |
| // the constructor taking stream IDs instead. |
| auto video_receiver = rtc::make_ref_counted<VideoRtpReceiver>( |
| worker_thread(), remote_sender_info.sender_id, streams); |
| |
| video_receiver->SetupMediaChannel( |
| remote_sender_info.sender_id == kDefaultVideoSenderId |
| ? absl::nullopt |
| : absl::optional<uint32_t>(remote_sender_info.first_ssrc), |
| video_media_channel()); |
| |
| auto receiver = RtpReceiverProxyWithInternal<RtpReceiverInternal>::Create( |
| signaling_thread(), worker_thread(), std::move(video_receiver)); |
| GetVideoTransceiver()->internal()->AddReceiver(receiver); |
| Observer()->OnAddTrack(receiver, streams); |
| NoteUsageEvent(UsageEvent::VIDEO_ADDED); |
| } |
| |
| // TODO(deadbeef): Keep RtpReceivers around even if track goes away in remote |
| // description. |
| rtc::scoped_refptr<RtpReceiverInterface> |
| RtpTransmissionManager::RemoveAndStopReceiver( |
| const RtpSenderInfo& remote_sender_info) { |
| auto receiver = FindReceiverById(remote_sender_info.sender_id); |
| if (!receiver) { |
| RTC_LOG(LS_WARNING) << "RtpReceiver for track with id " |
| << remote_sender_info.sender_id << " doesn't exist."; |
| return nullptr; |
| } |
| if (receiver->media_type() == cricket::MEDIA_TYPE_AUDIO) { |
| GetAudioTransceiver()->internal()->RemoveReceiver(receiver.get()); |
| } else { |
| GetVideoTransceiver()->internal()->RemoveReceiver(receiver.get()); |
| } |
| return receiver; |
| } |
| |
| void RtpTransmissionManager::OnRemoteSenderAdded( |
| const RtpSenderInfo& sender_info, |
| MediaStreamInterface* stream, |
| cricket::MediaType media_type) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| RTC_LOG(LS_INFO) << "Creating " << cricket::MediaTypeToString(media_type) |
| << " receiver for track_id=" << sender_info.sender_id |
| << " and stream_id=" << sender_info.stream_id; |
| |
| if (media_type == cricket::MEDIA_TYPE_AUDIO) { |
| CreateAudioReceiver(stream, sender_info); |
| } else if (media_type == cricket::MEDIA_TYPE_VIDEO) { |
| CreateVideoReceiver(stream, sender_info); |
| } else { |
| RTC_DCHECK_NOTREACHED() << "Invalid media type"; |
| } |
| } |
| |
| void RtpTransmissionManager::OnRemoteSenderRemoved( |
| const RtpSenderInfo& sender_info, |
| MediaStreamInterface* stream, |
| cricket::MediaType media_type) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| RTC_LOG(LS_INFO) << "Removing " << cricket::MediaTypeToString(media_type) |
| << " receiver for track_id=" << sender_info.sender_id |
| << " and stream_id=" << sender_info.stream_id; |
| |
| rtc::scoped_refptr<RtpReceiverInterface> receiver; |
| if (media_type == cricket::MEDIA_TYPE_AUDIO) { |
| // When the MediaEngine audio channel is destroyed, the RemoteAudioSource |
| // will be notified which will end the AudioRtpReceiver::track(). |
| receiver = RemoveAndStopReceiver(sender_info); |
| rtc::scoped_refptr<AudioTrackInterface> audio_track = |
| stream->FindAudioTrack(sender_info.sender_id); |
| if (audio_track) { |
| stream->RemoveTrack(audio_track); |
| } |
| } else if (media_type == cricket::MEDIA_TYPE_VIDEO) { |
| // Stopping or destroying a VideoRtpReceiver will end the |
| // VideoRtpReceiver::track(). |
| receiver = RemoveAndStopReceiver(sender_info); |
| rtc::scoped_refptr<VideoTrackInterface> video_track = |
| stream->FindVideoTrack(sender_info.sender_id); |
| if (video_track) { |
| // There's no guarantee the track is still available, e.g. the track may |
| // have been removed from the stream by an application. |
| stream->RemoveTrack(video_track); |
| } |
| } else { |
| RTC_DCHECK_NOTREACHED() << "Invalid media type"; |
| } |
| if (receiver) { |
| RTC_DCHECK(!closed_); |
| Observer()->OnRemoveTrack(receiver); |
| } |
| } |
| |
| void RtpTransmissionManager::OnLocalSenderAdded( |
| const RtpSenderInfo& sender_info, |
| cricket::MediaType media_type) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| RTC_DCHECK(!IsUnifiedPlan()); |
| auto sender = FindSenderById(sender_info.sender_id); |
| if (!sender) { |
| RTC_LOG(LS_WARNING) << "An unknown RtpSender with id " |
| << sender_info.sender_id |
| << " has been configured in the local description."; |
| return; |
| } |
| |
| if (sender->media_type() != media_type) { |
| RTC_LOG(LS_WARNING) << "An RtpSender has been configured in the local" |
| " description with an unexpected media type."; |
| return; |
| } |
| |
| sender->internal()->set_stream_ids({sender_info.stream_id}); |
| sender->internal()->SetSsrc(sender_info.first_ssrc); |
| } |
| |
| void RtpTransmissionManager::OnLocalSenderRemoved( |
| const RtpSenderInfo& sender_info, |
| cricket::MediaType media_type) { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| auto sender = FindSenderById(sender_info.sender_id); |
| if (!sender) { |
| // This is the normal case. I.e., RemoveStream has been called and the |
| // SessionDescriptions has been renegotiated. |
| return; |
| } |
| |
| // A sender has been removed from the SessionDescription but it's still |
| // associated with the PeerConnection. This only occurs if the SDP doesn't |
| // match with the calls to CreateSender, AddStream and RemoveStream. |
| if (sender->media_type() != media_type) { |
| RTC_LOG(LS_WARNING) << "An RtpSender has been configured in the local" |
| " description with an unexpected media type."; |
| return; |
| } |
| |
| sender->internal()->SetSsrc(0); |
| } |
| |
| std::vector<RtpSenderInfo>* RtpTransmissionManager::GetRemoteSenderInfos( |
| cricket::MediaType media_type) { |
| RTC_DCHECK(media_type == cricket::MEDIA_TYPE_AUDIO || |
| media_type == cricket::MEDIA_TYPE_VIDEO); |
| return (media_type == cricket::MEDIA_TYPE_AUDIO) |
| ? &remote_audio_sender_infos_ |
| : &remote_video_sender_infos_; |
| } |
| |
| std::vector<RtpSenderInfo>* RtpTransmissionManager::GetLocalSenderInfos( |
| cricket::MediaType media_type) { |
| RTC_DCHECK(media_type == cricket::MEDIA_TYPE_AUDIO || |
| media_type == cricket::MEDIA_TYPE_VIDEO); |
| return (media_type == cricket::MEDIA_TYPE_AUDIO) ? &local_audio_sender_infos_ |
| : &local_video_sender_infos_; |
| } |
| |
| const RtpSenderInfo* RtpTransmissionManager::FindSenderInfo( |
| const std::vector<RtpSenderInfo>& infos, |
| const std::string& stream_id, |
| const std::string& sender_id) const { |
| for (const RtpSenderInfo& sender_info : infos) { |
| if (sender_info.stream_id == stream_id && |
| sender_info.sender_id == sender_id) { |
| return &sender_info; |
| } |
| } |
| return nullptr; |
| } |
| |
| rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>> |
| RtpTransmissionManager::FindSenderForTrack( |
| MediaStreamTrackInterface* track) const { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| for (const auto& transceiver : transceivers_.List()) { |
| for (auto sender : transceiver->internal()->senders()) { |
| if (sender->track() == track) { |
| return sender; |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>> |
| RtpTransmissionManager::FindSenderById(const std::string& sender_id) const { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| for (const auto& transceiver : transceivers_.List()) { |
| for (auto sender : transceiver->internal()->senders()) { |
| if (sender->id() == sender_id) { |
| return sender; |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>> |
| RtpTransmissionManager::FindReceiverById(const std::string& receiver_id) const { |
| RTC_DCHECK_RUN_ON(signaling_thread()); |
| for (const auto& transceiver : transceivers_.List()) { |
| for (auto receiver : transceiver->internal()->receivers()) { |
| if (receiver->id() == receiver_id) { |
| return receiver; |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| cricket::MediaEngineInterface* RtpTransmissionManager::media_engine() const { |
| return context_->media_engine(); |
| } |
| |
| } // namespace webrtc |
