call/degraded_call.cc - src - Git at Google

 /*
  *  Copyright (c) 2018 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 "call/degraded_call.h"

 #include <memory>
 #include <utility>

 #include "rtc_base/location.h"

 namespace webrtc {

 DegradedCall::FakeNetworkPipeOnTaskQueue::FakeNetworkPipeOnTaskQueue(
     TaskQueueFactory* task_queue_factory,
     Clock* clock,
     std::unique_ptr<NetworkBehaviorInterface> network_behavior)
     : clock_(clock),
       task_queue_(task_queue_factory->CreateTaskQueue(
           "DegradedSendQueue",
           TaskQueueFactory::Priority::NORMAL)),
       pipe_(clock, std::move(network_behavior)) {}

 void DegradedCall::FakeNetworkPipeOnTaskQueue::SendRtp(
     const uint8_t* packet,
     size_t length,
     const PacketOptions& options,
     Transport* transport) {
   pipe_.SendRtp(packet, length, options, transport);
   Process();
 }

 void DegradedCall::FakeNetworkPipeOnTaskQueue::SendRtcp(const uint8_t* packet,
                                                         size_t length,
                                                         Transport* transport) {
   pipe_.SendRtcp(packet, length, transport);
   Process();
 }

 void DegradedCall::FakeNetworkPipeOnTaskQueue::AddActiveTransport(
     Transport* transport) {
   pipe_.AddActiveTransport(transport);
 }

 void DegradedCall::FakeNetworkPipeOnTaskQueue::RemoveActiveTransport(
     Transport* transport) {
   pipe_.RemoveActiveTransport(transport);
 }

 bool DegradedCall::FakeNetworkPipeOnTaskQueue::Process() {
   pipe_.Process();
   auto time_to_next = pipe_.TimeUntilNextProcess();
   if (!time_to_next) {
     // Packet was probably sent immediately.
     return false;
   }

   task_queue_.PostTask([this, time_to_next]() {
     RTC_DCHECK_RUN_ON(&task_queue_);
     int64_t next_process_time = *time_to_next + clock_->TimeInMilliseconds();
     if (!next_process_ms_ || next_process_time < *next_process_ms_) {
       next_process_ms_ = next_process_time;
       task_queue_.PostDelayedTask(
           [this]() {
             RTC_DCHECK_RUN_ON(&task_queue_);
             if (!Process()) {
               next_process_ms_.reset();
             }
           },
           *time_to_next);
     }
   });

   return true;
 }

 DegradedCall::FakeNetworkPipeTransportAdapter::FakeNetworkPipeTransportAdapter(
     FakeNetworkPipeOnTaskQueue* fake_network,
     Call* call,
     Clock* clock,
     Transport* real_transport)
     : network_pipe_(fake_network),
       call_(call),
       clock_(clock),
       real_transport_(real_transport) {
   network_pipe_->AddActiveTransport(real_transport);
 }

 DegradedCall::FakeNetworkPipeTransportAdapter::
     ~FakeNetworkPipeTransportAdapter() {
   network_pipe_->RemoveActiveTransport(real_transport_);
 }

 bool DegradedCall::FakeNetworkPipeTransportAdapter::SendRtp(
     const uint8_t* packet,
     size_t length,
     const PacketOptions& options) {
   // A call here comes from the RTP stack (probably pacer). We intercept it and
   // put it in the fake network pipe instead, but report to Call that is has
   // been sent, so that the bandwidth estimator sees the delay we add.
   network_pipe_->SendRtp(packet, length, options, real_transport_);
   if (options.packet_id != -1) {
     rtc::SentPacket sent_packet;
     sent_packet.packet_id = options.packet_id;
     sent_packet.send_time_ms = clock_->TimeInMilliseconds();
     sent_packet.info.included_in_feedback = options.included_in_feedback;
     sent_packet.info.included_in_allocation = options.included_in_allocation;
     sent_packet.info.packet_size_bytes = length;
     sent_packet.info.packet_type = rtc::PacketType::kData;
     call_->OnSentPacket(sent_packet);
   }
   return true;
 }

 bool DegradedCall::FakeNetworkPipeTransportAdapter::SendRtcp(
     const uint8_t* packet,
     size_t length) {
   network_pipe_->SendRtcp(packet, length, real_transport_);
   return true;
 }

 DegradedCall::DegradedCall(
     std::unique_ptr<Call> call,
     absl::optional<BuiltInNetworkBehaviorConfig> send_config,
     absl::optional<BuiltInNetworkBehaviorConfig> receive_config,
     TaskQueueFactory* task_queue_factory)
     : clock_(Clock::GetRealTimeClock()),
       call_(std::move(call)),
       task_queue_factory_(task_queue_factory),
       send_config_(send_config),
       send_simulated_network_(nullptr),
       receive_config_(receive_config) {
   if (receive_config_) {
     auto network = std::make_unique<SimulatedNetwork>(*receive_config_);
     receive_simulated_network_ = network.get();
     receive_pipe_ =
         std::make_unique<webrtc::FakeNetworkPipe>(clock_, std::move(network));
     receive_pipe_->SetReceiver(call_->Receiver());
   }
   if (send_config_) {
     auto network = std::make_unique<SimulatedNetwork>(*send_config_);
     send_simulated_network_ = network.get();
     send_pipe_ = std::make_unique<FakeNetworkPipeOnTaskQueue>(
         task_queue_factory_, clock_, std::move(network));
   }
 }

 DegradedCall::~DegradedCall() = default;

 AudioSendStream* DegradedCall::CreateAudioSendStream(
     const AudioSendStream::Config& config) {
   if (send_config_) {
     auto transport_adapter = std::make_unique<FakeNetworkPipeTransportAdapter>(
         send_pipe_.get(), call_.get(), clock_, config.send_transport);
     AudioSendStream::Config degrade_config = config;
     degrade_config.send_transport = transport_adapter.get();
     AudioSendStream* send_stream = call_->CreateAudioSendStream(degrade_config);
     if (send_stream) {
       audio_send_transport_adapters_[send_stream] =
           std::move(transport_adapter);
     }
     return send_stream;
   }
   return call_->CreateAudioSendStream(config);
 }

 void DegradedCall::DestroyAudioSendStream(AudioSendStream* send_stream) {
   call_->DestroyAudioSendStream(send_stream);
   audio_send_transport_adapters_.erase(send_stream);
 }

 AudioReceiveStream* DegradedCall::CreateAudioReceiveStream(
     const AudioReceiveStream::Config& config) {
   return call_->CreateAudioReceiveStream(config);
 }

 void DegradedCall::DestroyAudioReceiveStream(
     AudioReceiveStream* receive_stream) {
   call_->DestroyAudioReceiveStream(receive_stream);
 }

 VideoSendStream* DegradedCall::CreateVideoSendStream(
     VideoSendStream::Config config,
     VideoEncoderConfig encoder_config) {
   std::unique_ptr<FakeNetworkPipeTransportAdapter> transport_adapter;
   if (send_config_) {
     transport_adapter = std::make_unique<FakeNetworkPipeTransportAdapter>(
         send_pipe_.get(), call_.get(), clock_, config.send_transport);
     config.send_transport = transport_adapter.get();
   }
   VideoSendStream* send_stream = call_->CreateVideoSendStream(
       std::move(config), std::move(encoder_config));
   if (send_stream && transport_adapter) {
     video_send_transport_adapters_[send_stream] = std::move(transport_adapter);
   }
   return send_stream;
 }

 VideoSendStream* DegradedCall::CreateVideoSendStream(
     VideoSendStream::Config config,
     VideoEncoderConfig encoder_config,
     std::unique_ptr<FecController> fec_controller) {
   std::unique_ptr<FakeNetworkPipeTransportAdapter> transport_adapter;
   if (send_config_) {
     transport_adapter = std::make_unique<FakeNetworkPipeTransportAdapter>(
         send_pipe_.get(), call_.get(), clock_, config.send_transport);
     config.send_transport = transport_adapter.get();
   }
   VideoSendStream* send_stream = call_->CreateVideoSendStream(
       std::move(config), std::move(encoder_config), std::move(fec_controller));
   if (send_stream && transport_adapter) {
     video_send_transport_adapters_[send_stream] = std::move(transport_adapter);
   }
   return send_stream;
 }

 void DegradedCall::DestroyVideoSendStream(VideoSendStream* send_stream) {
   call_->DestroyVideoSendStream(send_stream);
   video_send_transport_adapters_.erase(send_stream);
 }

 VideoReceiveStream* DegradedCall::CreateVideoReceiveStream(
     VideoReceiveStream::Config configuration) {
   return call_->CreateVideoReceiveStream(std::move(configuration));
 }

 void DegradedCall::DestroyVideoReceiveStream(
     VideoReceiveStream* receive_stream) {
   call_->DestroyVideoReceiveStream(receive_stream);
 }

 FlexfecReceiveStream* DegradedCall::CreateFlexfecReceiveStream(
     const FlexfecReceiveStream::Config& config) {
   return call_->CreateFlexfecReceiveStream(config);
 }

 void DegradedCall::DestroyFlexfecReceiveStream(
     FlexfecReceiveStream* receive_stream) {
   call_->DestroyFlexfecReceiveStream(receive_stream);
 }

 void DegradedCall::AddAdaptationResource(
     rtc::scoped_refptr<Resource> resource) {
   call_->AddAdaptationResource(std::move(resource));
 }

 PacketReceiver* DegradedCall::Receiver() {
   if (receive_config_) {
     return this;
   }
   return call_->Receiver();
 }

 RtpTransportControllerSendInterface*
 DegradedCall::GetTransportControllerSend() {
   return call_->GetTransportControllerSend();
 }

 Call::Stats DegradedCall::GetStats() const {
   return call_->GetStats();
 }

 void DegradedCall::SignalChannelNetworkState(MediaType media,
                                              NetworkState state) {
   call_->SignalChannelNetworkState(media, state);
 }

 void DegradedCall::OnAudioTransportOverheadChanged(
     int transport_overhead_per_packet) {
   call_->OnAudioTransportOverheadChanged(transport_overhead_per_packet);
 }

 void DegradedCall::OnSentPacket(const rtc::SentPacket& sent_packet) {
   if (send_config_) {
     // If we have a degraded send-transport, we have already notified call
     // about the supposed network send time. Discard the actual network send
     // time in order to properly fool the BWE.
     return;
   }
   call_->OnSentPacket(sent_packet);
 }

 PacketReceiver::DeliveryStatus DegradedCall::DeliverPacket(
     MediaType media_type,
     rtc::CopyOnWriteBuffer packet,
     int64_t packet_time_us) {
   PacketReceiver::DeliveryStatus status = receive_pipe_->DeliverPacket(
       media_type, std::move(packet), packet_time_us);
   // This is not optimal, but there are many places where there are thread
   // checks that fail if we're not using the worker thread call into this
   // method. If we want to fix this we probably need a task queue to do handover
   // of all overriden methods, which feels like overkill for the current use
   // case.
   // By just having this thread call out via the Process() method we work around
   // that, with the tradeoff that a non-zero delay may become a little larger
   // than anticipated at very low packet rates.
   receive_pipe_->Process();
   return status;
 }
 }  // namespace webrtc
	/*
	* Copyright (c) 2018 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 "call/degraded_call.h"

	#include <memory>
	#include <utility>

	#include "rtc_base/location.h"

	namespace webrtc {

	DegradedCall::FakeNetworkPipeOnTaskQueue::FakeNetworkPipeOnTaskQueue(
	TaskQueueFactory* task_queue_factory,
	Clock* clock,
	std::unique_ptr<NetworkBehaviorInterface> network_behavior)
	: clock_(clock),
	task_queue_(task_queue_factory->CreateTaskQueue(
	"DegradedSendQueue",
	TaskQueueFactory::Priority::NORMAL)),
	pipe_(clock, std::move(network_behavior)) {}

	void DegradedCall::FakeNetworkPipeOnTaskQueue::SendRtp(
	const uint8_t* packet,
	size_t length,
	const PacketOptions& options,
	Transport* transport) {
	pipe_.SendRtp(packet, length, options, transport);
	Process();
	}

	void DegradedCall::FakeNetworkPipeOnTaskQueue::SendRtcp(const uint8_t* packet,
	size_t length,
	Transport* transport) {
	pipe_.SendRtcp(packet, length, transport);
	Process();
	}

	void DegradedCall::FakeNetworkPipeOnTaskQueue::AddActiveTransport(
	Transport* transport) {
	pipe_.AddActiveTransport(transport);
	}

	void DegradedCall::FakeNetworkPipeOnTaskQueue::RemoveActiveTransport(
	Transport* transport) {
	pipe_.RemoveActiveTransport(transport);
	}

	bool DegradedCall::FakeNetworkPipeOnTaskQueue::Process() {
	pipe_.Process();
	auto time_to_next = pipe_.TimeUntilNextProcess();
	if (!time_to_next) {
	// Packet was probably sent immediately.
	return false;
	}

	task_queue_.PostTask([this, time_to_next]() {
	RTC_DCHECK_RUN_ON(&task_queue_);
	int64_t next_process_time = *time_to_next + clock_->TimeInMilliseconds();
	if (!next_process_ms_ \|\| next_process_time < *next_process_ms_) {
	next_process_ms_ = next_process_time;
	task_queue_.PostDelayedTask(
	[this]() {
	RTC_DCHECK_RUN_ON(&task_queue_);
	if (!Process()) {
	next_process_ms_.reset();
	}
	},
	*time_to_next);
	}
	});

	return true;
	}

	DegradedCall::FakeNetworkPipeTransportAdapter::FakeNetworkPipeTransportAdapter(
	FakeNetworkPipeOnTaskQueue* fake_network,
	Call* call,
	Clock* clock,
	Transport* real_transport)
	: network_pipe_(fake_network),
	call_(call),
	clock_(clock),
	real_transport_(real_transport) {
	network_pipe_->AddActiveTransport(real_transport);
	}

	DegradedCall::FakeNetworkPipeTransportAdapter::
	~FakeNetworkPipeTransportAdapter() {
	network_pipe_->RemoveActiveTransport(real_transport_);
	}

	bool DegradedCall::FakeNetworkPipeTransportAdapter::SendRtp(
	const uint8_t* packet,
	size_t length,
	const PacketOptions& options) {
	// A call here comes from the RTP stack (probably pacer). We intercept it and
	// put it in the fake network pipe instead, but report to Call that is has
	// been sent, so that the bandwidth estimator sees the delay we add.
	network_pipe_->SendRtp(packet, length, options, real_transport_);
	if (options.packet_id != -1) {
	rtc::SentPacket sent_packet;
	sent_packet.packet_id = options.packet_id;
	sent_packet.send_time_ms = clock_->TimeInMilliseconds();
	sent_packet.info.included_in_feedback = options.included_in_feedback;
	sent_packet.info.included_in_allocation = options.included_in_allocation;
	sent_packet.info.packet_size_bytes = length;
	sent_packet.info.packet_type = rtc::PacketType::kData;
	call_->OnSentPacket(sent_packet);
	}
	return true;
	}

	bool DegradedCall::FakeNetworkPipeTransportAdapter::SendRtcp(
	const uint8_t* packet,
	size_t length) {
	network_pipe_->SendRtcp(packet, length, real_transport_);
	return true;
	}

	DegradedCall::DegradedCall(
	std::unique_ptr<Call> call,
	absl::optional<BuiltInNetworkBehaviorConfig> send_config,
	absl::optional<BuiltInNetworkBehaviorConfig> receive_config,
	TaskQueueFactory* task_queue_factory)
	: clock_(Clock::GetRealTimeClock()),
	call_(std::move(call)),
	task_queue_factory_(task_queue_factory),
	send_config_(send_config),
	send_simulated_network_(nullptr),
	receive_config_(receive_config) {
	if (receive_config_) {
	auto network = std::make_unique<SimulatedNetwork>(*receive_config_);
	receive_simulated_network_ = network.get();
	receive_pipe_ =
	std::make_unique<webrtc::FakeNetworkPipe>(clock_, std::move(network));
	receive_pipe_->SetReceiver(call_->Receiver());
	}
	if (send_config_) {
	auto network = std::make_unique<SimulatedNetwork>(*send_config_);
	send_simulated_network_ = network.get();
	send_pipe_ = std::make_unique<FakeNetworkPipeOnTaskQueue>(
	task_queue_factory_, clock_, std::move(network));
	}
	}

	DegradedCall::~DegradedCall() = default;

	AudioSendStream* DegradedCall::CreateAudioSendStream(
	const AudioSendStream::Config& config) {
	if (send_config_) {
	auto transport_adapter = std::make_unique<FakeNetworkPipeTransportAdapter>(
	send_pipe_.get(), call_.get(), clock_, config.send_transport);
	AudioSendStream::Config degrade_config = config;
	degrade_config.send_transport = transport_adapter.get();
	AudioSendStream* send_stream = call_->CreateAudioSendStream(degrade_config);
	if (send_stream) {
	audio_send_transport_adapters_[send_stream] =
	std::move(transport_adapter);
	}
	return send_stream;
	}
	return call_->CreateAudioSendStream(config);
	}

	void DegradedCall::DestroyAudioSendStream(AudioSendStream* send_stream) {
	call_->DestroyAudioSendStream(send_stream);
	audio_send_transport_adapters_.erase(send_stream);
	}

	AudioReceiveStream* DegradedCall::CreateAudioReceiveStream(
	const AudioReceiveStream::Config& config) {
	return call_->CreateAudioReceiveStream(config);
	}

	void DegradedCall::DestroyAudioReceiveStream(
	AudioReceiveStream* receive_stream) {
	call_->DestroyAudioReceiveStream(receive_stream);
	}

	VideoSendStream* DegradedCall::CreateVideoSendStream(
	VideoSendStream::Config config,
	VideoEncoderConfig encoder_config) {
	std::unique_ptr<FakeNetworkPipeTransportAdapter> transport_adapter;
	if (send_config_) {
	transport_adapter = std::make_unique<FakeNetworkPipeTransportAdapter>(
	send_pipe_.get(), call_.get(), clock_, config.send_transport);
	config.send_transport = transport_adapter.get();
	}
	VideoSendStream* send_stream = call_->CreateVideoSendStream(
	std::move(config), std::move(encoder_config));
	if (send_stream && transport_adapter) {
	video_send_transport_adapters_[send_stream] = std::move(transport_adapter);
	}
	return send_stream;
	}

	VideoSendStream* DegradedCall::CreateVideoSendStream(
	VideoSendStream::Config config,
	VideoEncoderConfig encoder_config,
	std::unique_ptr<FecController> fec_controller) {
	std::unique_ptr<FakeNetworkPipeTransportAdapter> transport_adapter;
	if (send_config_) {
	transport_adapter = std::make_unique<FakeNetworkPipeTransportAdapter>(
	send_pipe_.get(), call_.get(), clock_, config.send_transport);
	config.send_transport = transport_adapter.get();
	}
	VideoSendStream* send_stream = call_->CreateVideoSendStream(
	std::move(config), std::move(encoder_config), std::move(fec_controller));
	if (send_stream && transport_adapter) {
	video_send_transport_adapters_[send_stream] = std::move(transport_adapter);
	}
	return send_stream;
	}

	void DegradedCall::DestroyVideoSendStream(VideoSendStream* send_stream) {
	call_->DestroyVideoSendStream(send_stream);
	video_send_transport_adapters_.erase(send_stream);
	}

	VideoReceiveStream* DegradedCall::CreateVideoReceiveStream(
	VideoReceiveStream::Config configuration) {
	return call_->CreateVideoReceiveStream(std::move(configuration));
	}

	void DegradedCall::DestroyVideoReceiveStream(
	VideoReceiveStream* receive_stream) {
	call_->DestroyVideoReceiveStream(receive_stream);
	}

	FlexfecReceiveStream* DegradedCall::CreateFlexfecReceiveStream(
	const FlexfecReceiveStream::Config& config) {
	return call_->CreateFlexfecReceiveStream(config);
	}

	void DegradedCall::DestroyFlexfecReceiveStream(
	FlexfecReceiveStream* receive_stream) {
	call_->DestroyFlexfecReceiveStream(receive_stream);
	}

	void DegradedCall::AddAdaptationResource(
	rtc::scoped_refptr<Resource> resource) {
	call_->AddAdaptationResource(std::move(resource));
	}

	PacketReceiver* DegradedCall::Receiver() {
	if (receive_config_) {
	return this;
	}
	return call_->Receiver();
	}

	RtpTransportControllerSendInterface*
	DegradedCall::GetTransportControllerSend() {
	return call_->GetTransportControllerSend();
	}

	Call::Stats DegradedCall::GetStats() const {
	return call_->GetStats();
	}

	void DegradedCall::SignalChannelNetworkState(MediaType media,
	NetworkState state) {
	call_->SignalChannelNetworkState(media, state);
	}

	void DegradedCall::OnAudioTransportOverheadChanged(
	int transport_overhead_per_packet) {
	call_->OnAudioTransportOverheadChanged(transport_overhead_per_packet);
	}

	void DegradedCall::OnSentPacket(const rtc::SentPacket& sent_packet) {
	if (send_config_) {
	// If we have a degraded send-transport, we have already notified call
	// about the supposed network send time. Discard the actual network send
	// time in order to properly fool the BWE.
	return;
	}
	call_->OnSentPacket(sent_packet);
	}

	PacketReceiver::DeliveryStatus DegradedCall::DeliverPacket(
	MediaType media_type,
	rtc::CopyOnWriteBuffer packet,
	int64_t packet_time_us) {
	PacketReceiver::DeliveryStatus status = receive_pipe_->DeliverPacket(
	media_type, std::move(packet), packet_time_us);
	// This is not optimal, but there are many places where there are thread
	// checks that fail if we're not using the worker thread call into this
	// method. If we want to fix this we probably need a task queue to do handover
	// of all overriden methods, which feels like overkill for the current use
	// case.
	// By just having this thread call out via the Process() method we work around
	// that, with the tradeoff that a non-zero delay may become a little larger
	// than anticipated at very low packet rates.
	receive_pipe_->Process();
	return status;
	}
	} // namespace webrtc