audio/audio_receive_stream_unittest.cc - src.git - Git at Google

 /*
  *  Copyright (c) 2015 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 "audio/audio_receive_stream.h"

 #include <map>
 #include <string>
 #include <utility>
 #include <vector>

 #include "api/environment/environment_factory.h"
 #include "api/test/mock_audio_mixer.h"
 #include "api/test/mock_frame_decryptor.h"
 #include "audio/conversion.h"
 #include "audio/mock_voe_channel_proxy.h"
 #include "call/rtp_stream_receiver_controller.h"
 #include "modules/audio_device/include/mock_audio_device.h"
 #include "modules/audio_processing/include/mock_audio_processing.h"
 #include "modules/pacing/packet_router.h"
 #include "modules/rtp_rtcp/source/byte_io.h"
 #include "rtc_base/time_utils.h"
 #include "test/gtest.h"
 #include "test/mock_audio_decoder_factory.h"
 #include "test/mock_transport.h"
 #include "test/run_loop.h"

 namespace webrtc {
 namespace test {
 namespace {

 using ::testing::_;
 using ::testing::FloatEq;
 using ::testing::NiceMock;
 using ::testing::Return;

 AudioDecodingCallStats MakeAudioDecodeStatsForTest() {
   AudioDecodingCallStats audio_decode_stats;
   audio_decode_stats.calls_to_silence_generator = 234;
   audio_decode_stats.calls_to_neteq = 567;
   audio_decode_stats.decoded_normal = 890;
   audio_decode_stats.decoded_neteq_plc = 123;
   audio_decode_stats.decoded_codec_plc = 124;
   audio_decode_stats.decoded_cng = 456;
   audio_decode_stats.decoded_plc_cng = 789;
   audio_decode_stats.decoded_muted_output = 987;
   return audio_decode_stats;
 }

 const uint32_t kRemoteSsrc = 1234;
 const uint32_t kLocalSsrc = 5678;
 const int kJitterBufferDelay = -7;
 const int kPlayoutBufferDelay = 302;
 const unsigned int kSpeechOutputLevel = 99;
 const double kTotalOutputEnergy = 0.25;
 const double kTotalOutputDuration = 0.5;
 const int64_t kPlayoutNtpTimestampMs = 5678;

 const CallReceiveStatistics kCallStats = {678, 234, -12, 567, 78, 890, 123};
 const std::pair<int, SdpAudioFormat> kReceiveCodec = {
     123,
     {"codec_name_recv", 96000, 0}};
 const NetworkStatistics kNetworkStats = {
     /*currentBufferSize=*/123,
     /*preferredBufferSize=*/456,
     /*jitterPeaksFound=*/false,
     /*totalSamplesReceived=*/789012,
     /*concealedSamples=*/3456,
     /*silentConcealedSamples=*/123,
     /*concealmentEvents=*/456,
     /*jitterBufferDelayMs=*/789,
     /*jitterBufferEmittedCount=*/543,
     /*jitterBufferTargetDelayMs=*/123,
     /*jitterBufferMinimumDelayMs=*/222,
     /*insertedSamplesForDeceleration=*/432,
     /*removedSamplesForAcceleration=*/321,
     /*fecPacketsReceived=*/123,
     /*fecPacketsDiscarded=*/101,
     /*totalProcessingDelayMs=*/154,
     /*packetsDiscarded=*/989,
     /*currentExpandRate=*/789,
     /*currentSpeechExpandRate=*/12,
     /*currentPreemptiveRate=*/345,
     /*currentAccelerateRate =*/678,
     /*currentSecondaryDecodedRate=*/901,
     /*currentSecondaryDiscardedRate=*/0,
     /*meanWaitingTimeMs=*/-1,
     /*maxWaitingTimeMs=*/-1,
     /*packetBufferFlushes=*/0,
     /*delayedPacketOutageSamples=*/0,
     /*relativePacketArrivalDelayMs=*/135,
     /*interruptionCount=*/-1,
     /*totalInterruptionDurationMs=*/-1};
 const AudioDecodingCallStats kAudioDecodeStats = MakeAudioDecodeStatsForTest();

 struct ConfigHelper {
   explicit ConfigHelper(bool use_null_audio_processing)
       : ConfigHelper(rtc::make_ref_counted<MockAudioMixer>(),
                      use_null_audio_processing) {}

   ConfigHelper(rtc::scoped_refptr<MockAudioMixer> audio_mixer,
                bool use_null_audio_processing)
       : audio_mixer_(audio_mixer) {
     using ::testing::Invoke;

     AudioState::Config config;
     config.audio_mixer = audio_mixer_;
     config.audio_processing =
         use_null_audio_processing
             ? nullptr
             : rtc::make_ref_counted<NiceMock<MockAudioProcessing>>();
     config.audio_device_module =
         rtc::make_ref_counted<testing::NiceMock<MockAudioDeviceModule>>();
     audio_state_ = AudioState::Create(config);

     channel_receive_ = new ::testing::StrictMock<MockChannelReceive>();
     EXPECT_CALL(*channel_receive_, SetNACKStatus(true, 15)).Times(1);
     EXPECT_CALL(*channel_receive_, SetRtcpMode(_)).Times(1);
     EXPECT_CALL(*channel_receive_,
                 RegisterReceiverCongestionControlObjects(&packet_router_))
         .Times(1);
     EXPECT_CALL(*channel_receive_, ResetReceiverCongestionControlObjects())
         .Times(1);
     EXPECT_CALL(*channel_receive_, SetAssociatedSendChannel(nullptr)).Times(1);
     EXPECT_CALL(*channel_receive_, SetReceiveCodecs(_))
         .WillRepeatedly(Invoke([](const std::map<int, SdpAudioFormat>& codecs) {
           EXPECT_THAT(codecs, ::testing::IsEmpty());
         }));
     EXPECT_CALL(*channel_receive_, SetSourceTracker(_));
     EXPECT_CALL(*channel_receive_, GetLocalSsrc())
         .WillRepeatedly(Return(kLocalSsrc));

     stream_config_.rtp.local_ssrc = kLocalSsrc;
     stream_config_.rtp.remote_ssrc = kRemoteSsrc;
     stream_config_.rtp.nack.rtp_history_ms = 300;
     stream_config_.rtcp_send_transport = &rtcp_send_transport_;
     stream_config_.decoder_factory =
         rtc::make_ref_counted<MockAudioDecoderFactory>();
   }

   std::unique_ptr<AudioReceiveStreamImpl> CreateAudioReceiveStream() {
     auto ret = std::make_unique<AudioReceiveStreamImpl>(
         CreateEnvironment(), &packet_router_, stream_config_, audio_state_,
         std::unique_ptr<voe::ChannelReceiveInterface>(channel_receive_));
     ret->RegisterWithTransport(&rtp_stream_receiver_controller_);
     return ret;
   }

   AudioReceiveStreamInterface::Config& config() { return stream_config_; }
   rtc::scoped_refptr<MockAudioMixer> audio_mixer() { return audio_mixer_; }
   MockChannelReceive* channel_receive() { return channel_receive_; }

   void SetupMockForGetStats() {
     using ::testing::DoAll;
     using ::testing::SetArgPointee;

     ASSERT_TRUE(channel_receive_);
     EXPECT_CALL(*channel_receive_, GetRTCPStatistics())
         .WillOnce(Return(kCallStats));
     EXPECT_CALL(*channel_receive_, GetDelayEstimate())
         .WillOnce(Return(kJitterBufferDelay + kPlayoutBufferDelay));
     EXPECT_CALL(*channel_receive_, GetSpeechOutputLevelFullRange())
         .WillOnce(Return(kSpeechOutputLevel));
     EXPECT_CALL(*channel_receive_, GetTotalOutputEnergy())
         .WillOnce(Return(kTotalOutputEnergy));
     EXPECT_CALL(*channel_receive_, GetTotalOutputDuration())
         .WillOnce(Return(kTotalOutputDuration));
     EXPECT_CALL(*channel_receive_, GetNetworkStatistics(_))
         .WillOnce(Return(kNetworkStats));
     EXPECT_CALL(*channel_receive_, GetDecodingCallStatistics())
         .WillOnce(Return(kAudioDecodeStats));
     EXPECT_CALL(*channel_receive_, GetReceiveCodec())
         .WillOnce(Return(kReceiveCodec));
     EXPECT_CALL(*channel_receive_, GetCurrentEstimatedPlayoutNtpTimestampMs(_))
         .WillOnce(Return(kPlayoutNtpTimestampMs));
   }

  private:
   PacketRouter packet_router_;
   rtc::scoped_refptr<AudioState> audio_state_;
   rtc::scoped_refptr<MockAudioMixer> audio_mixer_;
   AudioReceiveStreamInterface::Config stream_config_;
   ::testing::StrictMock<MockChannelReceive>* channel_receive_ = nullptr;
   RtpStreamReceiverController rtp_stream_receiver_controller_;
   MockTransport rtcp_send_transport_;
 };

 const std::vector<uint8_t> CreateRtcpSenderReport() {
   std::vector<uint8_t> packet;
   const size_t kRtcpSrLength = 28;  // In bytes.
   packet.resize(kRtcpSrLength);
   packet[0] = 0x80;  // Version 2.
   packet[1] = 0xc8;  // PT = 200, SR.
   // Length in number of 32-bit words - 1.
   ByteWriter<uint16_t>::WriteBigEndian(&packet[2], 6);
   ByteWriter<uint32_t>::WriteBigEndian(&packet[4], kLocalSsrc);
   return packet;
 }
 }  // namespace

 TEST(AudioReceiveStreamTest, ConfigToString) {
   AudioReceiveStreamInterface::Config config;
   config.rtp.remote_ssrc = kRemoteSsrc;
   config.rtp.local_ssrc = kLocalSsrc;
   config.rtp.rtcp_mode = RtcpMode::kOff;
   EXPECT_EQ(
       "{rtp: {remote_ssrc: 1234, local_ssrc: 5678, nack: "
       "{rtp_history_ms: 0}, rtcp: off}, "
       "rtcp_send_transport: null}",
       config.ToString());
 }

 TEST(AudioReceiveStreamTest, ConstructDestruct) {
   test::RunLoop loop;
   for (bool use_null_audio_processing : {false, true}) {
     ConfigHelper helper(use_null_audio_processing);
     auto recv_stream = helper.CreateAudioReceiveStream();
     recv_stream->UnregisterFromTransport();
   }
 }

 TEST(AudioReceiveStreamTest, ReceiveRtcpPacket) {
   test::RunLoop loop;
   for (bool use_null_audio_processing : {false, true}) {
     ConfigHelper helper(use_null_audio_processing);
     auto recv_stream = helper.CreateAudioReceiveStream();
     std::vector<uint8_t> rtcp_packet = CreateRtcpSenderReport();
     EXPECT_CALL(*helper.channel_receive(),
                 ReceivedRTCPPacket(&rtcp_packet[0], rtcp_packet.size()))
         .WillOnce(Return());
     recv_stream->DeliverRtcp(&rtcp_packet[0], rtcp_packet.size());
     recv_stream->UnregisterFromTransport();
   }
 }

 TEST(AudioReceiveStreamTest, GetStats) {
   test::RunLoop loop;
   for (bool use_null_audio_processing : {false, true}) {
     ConfigHelper helper(use_null_audio_processing);
     auto recv_stream = helper.CreateAudioReceiveStream();
     helper.SetupMockForGetStats();
     AudioReceiveStreamInterface::Stats stats =
         recv_stream->GetStats(/*get_and_clear_legacy_stats=*/true);
     EXPECT_EQ(kRemoteSsrc, stats.remote_ssrc);
     EXPECT_EQ(kCallStats.payload_bytes_received, stats.payload_bytes_received);
     EXPECT_EQ(kCallStats.header_and_padding_bytes_received,
               stats.header_and_padding_bytes_received);
     EXPECT_EQ(static_cast<uint32_t>(kCallStats.packetsReceived),
               stats.packets_received);
     EXPECT_EQ(kCallStats.cumulativeLost, stats.packets_lost);
     EXPECT_EQ(kReceiveCodec.second.name, stats.codec_name);
     EXPECT_EQ(
         kCallStats.jitterSamples / (kReceiveCodec.second.clockrate_hz / 1000),
         stats.jitter_ms);
     EXPECT_EQ(kNetworkStats.currentBufferSize, stats.jitter_buffer_ms);
     EXPECT_EQ(kNetworkStats.preferredBufferSize,
               stats.jitter_buffer_preferred_ms);
     EXPECT_EQ(static_cast<uint32_t>(kJitterBufferDelay + kPlayoutBufferDelay),
               stats.delay_estimate_ms);
     EXPECT_EQ(static_cast<int32_t>(kSpeechOutputLevel), stats.audio_level);
     EXPECT_EQ(kTotalOutputEnergy, stats.total_output_energy);
     EXPECT_EQ(kNetworkStats.totalSamplesReceived, stats.total_samples_received);
     EXPECT_EQ(kTotalOutputDuration, stats.total_output_duration);
     EXPECT_EQ(kNetworkStats.concealedSamples, stats.concealed_samples);
     EXPECT_EQ(kNetworkStats.concealmentEvents, stats.concealment_events);
     EXPECT_EQ(static_cast<double>(kNetworkStats.jitterBufferDelayMs) /
                   static_cast<double>(rtc::kNumMillisecsPerSec),
               stats.jitter_buffer_delay_seconds);
     EXPECT_EQ(kNetworkStats.jitterBufferEmittedCount,
               stats.jitter_buffer_emitted_count);
     EXPECT_EQ(static_cast<double>(kNetworkStats.jitterBufferTargetDelayMs) /
                   static_cast<double>(rtc::kNumMillisecsPerSec),
               stats.jitter_buffer_target_delay_seconds);
     EXPECT_EQ(static_cast<double>(kNetworkStats.jitterBufferMinimumDelayMs) /
                   static_cast<double>(rtc::kNumMillisecsPerSec),
               stats.jitter_buffer_minimum_delay_seconds);
     EXPECT_EQ(kNetworkStats.insertedSamplesForDeceleration,
               stats.inserted_samples_for_deceleration);
     EXPECT_EQ(kNetworkStats.removedSamplesForAcceleration,
               stats.removed_samples_for_acceleration);
     EXPECT_EQ(kNetworkStats.fecPacketsReceived, stats.fec_packets_received);
     EXPECT_EQ(kNetworkStats.fecPacketsDiscarded, stats.fec_packets_discarded);
     EXPECT_EQ(static_cast<double>(kNetworkStats.totalProcessingDelayUs) /
                   static_cast<double>(rtc::kNumMicrosecsPerSec),
               stats.total_processing_delay_seconds);
     EXPECT_EQ(kNetworkStats.packetsDiscarded, stats.packets_discarded);
     EXPECT_EQ(Q14ToFloat(kNetworkStats.currentExpandRate), stats.expand_rate);
     EXPECT_EQ(Q14ToFloat(kNetworkStats.currentSpeechExpandRate),
               stats.speech_expand_rate);
     EXPECT_EQ(Q14ToFloat(kNetworkStats.currentSecondaryDecodedRate),
               stats.secondary_decoded_rate);
     EXPECT_EQ(Q14ToFloat(kNetworkStats.currentSecondaryDiscardedRate),
               stats.secondary_discarded_rate);
     EXPECT_EQ(Q14ToFloat(kNetworkStats.currentAccelerateRate),
               stats.accelerate_rate);
     EXPECT_EQ(Q14ToFloat(kNetworkStats.currentPreemptiveRate),
               stats.preemptive_expand_rate);
     EXPECT_EQ(kNetworkStats.packetBufferFlushes, stats.jitter_buffer_flushes);
     EXPECT_EQ(kNetworkStats.delayedPacketOutageSamples,
               stats.delayed_packet_outage_samples);
     EXPECT_EQ(static_cast<double>(kNetworkStats.relativePacketArrivalDelayMs) /
                   static_cast<double>(rtc::kNumMillisecsPerSec),
               stats.relative_packet_arrival_delay_seconds);
     EXPECT_EQ(kNetworkStats.interruptionCount, stats.interruption_count);
     EXPECT_EQ(kNetworkStats.totalInterruptionDurationMs,
               stats.total_interruption_duration_ms);

     EXPECT_EQ(kAudioDecodeStats.calls_to_silence_generator,
               stats.decoding_calls_to_silence_generator);
     EXPECT_EQ(kAudioDecodeStats.calls_to_neteq, stats.decoding_calls_to_neteq);
     EXPECT_EQ(kAudioDecodeStats.decoded_normal, stats.decoding_normal);
     EXPECT_EQ(kAudioDecodeStats.decoded_neteq_plc, stats.decoding_plc);
     EXPECT_EQ(kAudioDecodeStats.decoded_codec_plc, stats.decoding_codec_plc);
     EXPECT_EQ(kAudioDecodeStats.decoded_cng, stats.decoding_cng);
     EXPECT_EQ(kAudioDecodeStats.decoded_plc_cng, stats.decoding_plc_cng);
     EXPECT_EQ(kAudioDecodeStats.decoded_muted_output,
               stats.decoding_muted_output);
     EXPECT_EQ(kCallStats.capture_start_ntp_time_ms_,
               stats.capture_start_ntp_time_ms);
     EXPECT_EQ(kPlayoutNtpTimestampMs, stats.estimated_playout_ntp_timestamp_ms);
     recv_stream->UnregisterFromTransport();
   }
 }

 TEST(AudioReceiveStreamTest, SetGain) {
   test::RunLoop loop;
   for (bool use_null_audio_processing : {false, true}) {
     ConfigHelper helper(use_null_audio_processing);
     auto recv_stream = helper.CreateAudioReceiveStream();
     EXPECT_CALL(*helper.channel_receive(),
                 SetChannelOutputVolumeScaling(FloatEq(0.765f)));
     recv_stream->SetGain(0.765f);
     recv_stream->UnregisterFromTransport();
   }
 }

 TEST(AudioReceiveStreamTest, StreamsShouldBeAddedToMixerOnceOnStart) {
   test::RunLoop loop;
   for (bool use_null_audio_processing : {false, true}) {
     ConfigHelper helper1(use_null_audio_processing);
     ConfigHelper helper2(helper1.audio_mixer(), use_null_audio_processing);
     auto recv_stream1 = helper1.CreateAudioReceiveStream();
     auto recv_stream2 = helper2.CreateAudioReceiveStream();

     EXPECT_CALL(*helper1.channel_receive(), StartPlayout()).Times(1);
     EXPECT_CALL(*helper2.channel_receive(), StartPlayout()).Times(1);
     EXPECT_CALL(*helper1.channel_receive(), StopPlayout()).Times(1);
     EXPECT_CALL(*helper2.channel_receive(), StopPlayout()).Times(1);
     EXPECT_CALL(*helper1.audio_mixer(), AddSource(recv_stream1.get()))
         .WillOnce(Return(true));
     EXPECT_CALL(*helper1.audio_mixer(), AddSource(recv_stream2.get()))
         .WillOnce(Return(true));
     EXPECT_CALL(*helper1.audio_mixer(), RemoveSource(recv_stream1.get()))
         .Times(1);
     EXPECT_CALL(*helper1.audio_mixer(), RemoveSource(recv_stream2.get()))
         .Times(1);

     recv_stream1->Start();
     recv_stream2->Start();

     // One more should not result in any more mixer sources added.
     recv_stream1->Start();

     // Stop stream before it is being destructed.
     recv_stream2->Stop();

     recv_stream1->UnregisterFromTransport();
     recv_stream2->UnregisterFromTransport();
   }
 }

 TEST(AudioReceiveStreamTest, ReconfigureWithUpdatedConfig) {
   test::RunLoop loop;
   for (bool use_null_audio_processing : {false, true}) {
     ConfigHelper helper(use_null_audio_processing);
     auto recv_stream = helper.CreateAudioReceiveStream();

     auto new_config = helper.config();

     MockChannelReceive& channel_receive = *helper.channel_receive();

     // TODO(tommi, nisse): This applies new extensions to the internal config,
     // but there's nothing that actually verifies that the changes take effect.
     // In fact Call manages the extensions separately in Call::ReceiveRtpConfig
     // and changing this config value (there seem to be a few copies), doesn't
     // affect that logic.
     recv_stream->ReconfigureForTesting(new_config);

     new_config.decoder_map.emplace(1, SdpAudioFormat("foo", 8000, 1));
     EXPECT_CALL(channel_receive, SetReceiveCodecs(new_config.decoder_map));
     recv_stream->SetDecoderMap(new_config.decoder_map);

     EXPECT_CALL(channel_receive, SetNACKStatus(true, 15 + 1)).Times(1);
     recv_stream->SetNackHistory(300 + 20);

     recv_stream->UnregisterFromTransport();
   }
 }

 TEST(AudioReceiveStreamTest, ReconfigureWithFrameDecryptor) {
   test::RunLoop loop;
   for (bool use_null_audio_processing : {false, true}) {
     ConfigHelper helper(use_null_audio_processing);
     auto recv_stream = helper.CreateAudioReceiveStream();

     auto new_config_0 = helper.config();
     rtc::scoped_refptr<FrameDecryptorInterface> mock_frame_decryptor_0(
         rtc::make_ref_counted<MockFrameDecryptor>());
     new_config_0.frame_decryptor = mock_frame_decryptor_0;

     // TODO(tommi): While this changes the internal config value, it doesn't
     // actually change what frame_decryptor is used. WebRtcAudioReceiveStream
     // recreates the whole instance in order to change this value.
     // So, it's not clear if changing this post initialization needs to be
     // supported.
     recv_stream->ReconfigureForTesting(new_config_0);

     auto new_config_1 = helper.config();
     rtc::scoped_refptr<FrameDecryptorInterface> mock_frame_decryptor_1(
         rtc::make_ref_counted<MockFrameDecryptor>());
     new_config_1.frame_decryptor = mock_frame_decryptor_1;
     new_config_1.crypto_options.sframe.require_frame_encryption = true;
     recv_stream->ReconfigureForTesting(new_config_1);
     recv_stream->UnregisterFromTransport();
   }
 }

 }  // namespace test
 }  // namespace webrtc
	/*
	* Copyright (c) 2015 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 "audio/audio_receive_stream.h"

	#include <map>
	#include <string>
	#include <utility>
	#include <vector>

	#include "api/environment/environment_factory.h"
	#include "api/test/mock_audio_mixer.h"
	#include "api/test/mock_frame_decryptor.h"
	#include "audio/conversion.h"
	#include "audio/mock_voe_channel_proxy.h"
	#include "call/rtp_stream_receiver_controller.h"
	#include "modules/audio_device/include/mock_audio_device.h"
	#include "modules/audio_processing/include/mock_audio_processing.h"
	#include "modules/pacing/packet_router.h"
	#include "modules/rtp_rtcp/source/byte_io.h"
	#include "rtc_base/time_utils.h"
	#include "test/gtest.h"
	#include "test/mock_audio_decoder_factory.h"
	#include "test/mock_transport.h"
	#include "test/run_loop.h"

	namespace webrtc {
	namespace test {
	namespace {

	using ::testing::_;
	using ::testing::FloatEq;
	using ::testing::NiceMock;
	using ::testing::Return;

	AudioDecodingCallStats MakeAudioDecodeStatsForTest() {
	AudioDecodingCallStats audio_decode_stats;
	audio_decode_stats.calls_to_silence_generator = 234;
	audio_decode_stats.calls_to_neteq = 567;
	audio_decode_stats.decoded_normal = 890;
	audio_decode_stats.decoded_neteq_plc = 123;
	audio_decode_stats.decoded_codec_plc = 124;
	audio_decode_stats.decoded_cng = 456;
	audio_decode_stats.decoded_plc_cng = 789;
	audio_decode_stats.decoded_muted_output = 987;
	return audio_decode_stats;
	}

	const uint32_t kRemoteSsrc = 1234;
	const uint32_t kLocalSsrc = 5678;
	const int kJitterBufferDelay = -7;
	const int kPlayoutBufferDelay = 302;
	const unsigned int kSpeechOutputLevel = 99;
	const double kTotalOutputEnergy = 0.25;
	const double kTotalOutputDuration = 0.5;
	const int64_t kPlayoutNtpTimestampMs = 5678;

	const CallReceiveStatistics kCallStats = {678, 234, -12, 567, 78, 890, 123};
	const std::pair<int, SdpAudioFormat> kReceiveCodec = {
	123,
	{"codec_name_recv", 96000, 0}};
	const NetworkStatistics kNetworkStats = {
	/currentBufferSize=/123,
	/preferredBufferSize=/456,
	/jitterPeaksFound=/false,
	/totalSamplesReceived=/789012,
	/concealedSamples=/3456,
	/silentConcealedSamples=/123,
	/concealmentEvents=/456,
	/jitterBufferDelayMs=/789,
	/jitterBufferEmittedCount=/543,
	/jitterBufferTargetDelayMs=/123,
	/jitterBufferMinimumDelayMs=/222,
	/insertedSamplesForDeceleration=/432,
	/removedSamplesForAcceleration=/321,
	/fecPacketsReceived=/123,
	/fecPacketsDiscarded=/101,
	/totalProcessingDelayMs=/154,
	/packetsDiscarded=/989,
	/currentExpandRate=/789,
	/currentSpeechExpandRate=/12,
	/currentPreemptiveRate=/345,
	/currentAccelerateRate =/678,
	/currentSecondaryDecodedRate=/901,
	/currentSecondaryDiscardedRate=/0,
	/meanWaitingTimeMs=/-1,
	/maxWaitingTimeMs=/-1,
	/packetBufferFlushes=/0,
	/delayedPacketOutageSamples=/0,
	/relativePacketArrivalDelayMs=/135,
	/interruptionCount=/-1,
	/totalInterruptionDurationMs=/-1};
	const AudioDecodingCallStats kAudioDecodeStats = MakeAudioDecodeStatsForTest();

	struct ConfigHelper {
	explicit ConfigHelper(bool use_null_audio_processing)
	: ConfigHelper(rtc::make_ref_counted<MockAudioMixer>(),
	use_null_audio_processing) {}

	ConfigHelper(rtc::scoped_refptr<MockAudioMixer> audio_mixer,
	bool use_null_audio_processing)
	: audio_mixer_(audio_mixer) {
	using ::testing::Invoke;

	AudioState::Config config;
	config.audio_mixer = audio_mixer_;
	config.audio_processing =
	use_null_audio_processing
	? nullptr
	: rtc::make_ref_counted<NiceMock<MockAudioProcessing>>();
	config.audio_device_module =
	rtc::make_ref_counted<testing::NiceMock<MockAudioDeviceModule>>();
	audio_state_ = AudioState::Create(config);

	channel_receive_ = new ::testing::StrictMock<MockChannelReceive>();
	EXPECT_CALL(*channel_receive_, SetNACKStatus(true, 15)).Times(1);
	EXPECT_CALL(*channel_receive_, SetRtcpMode(_)).Times(1);
	EXPECT_CALL(*channel_receive_,
	RegisterReceiverCongestionControlObjects(&packet_router_))
	.Times(1);
	EXPECT_CALL(*channel_receive_, ResetReceiverCongestionControlObjects())
	.Times(1);
	EXPECT_CALL(*channel_receive_, SetAssociatedSendChannel(nullptr)).Times(1);
	EXPECT_CALL(*channel_receive_, SetReceiveCodecs(_))
	.WillRepeatedly(Invoke([](const std::map<int, SdpAudioFormat>& codecs) {
	EXPECT_THAT(codecs, ::testing::IsEmpty());
	}));
	EXPECT_CALL(*channel_receive_, SetSourceTracker(_));
	EXPECT_CALL(*channel_receive_, GetLocalSsrc())
	.WillRepeatedly(Return(kLocalSsrc));

	stream_config_.rtp.local_ssrc = kLocalSsrc;
	stream_config_.rtp.remote_ssrc = kRemoteSsrc;
	stream_config_.rtp.nack.rtp_history_ms = 300;
	stream_config_.rtcp_send_transport = &rtcp_send_transport_;
	stream_config_.decoder_factory =
	rtc::make_ref_counted<MockAudioDecoderFactory>();
	}

	std::unique_ptr<AudioReceiveStreamImpl> CreateAudioReceiveStream() {
	auto ret = std::make_unique<AudioReceiveStreamImpl>(
	CreateEnvironment(), &packet_router_, stream_config_, audio_state_,
	std::unique_ptr<voe::ChannelReceiveInterface>(channel_receive_));
	ret->RegisterWithTransport(&rtp_stream_receiver_controller_);
	return ret;
	}

	AudioReceiveStreamInterface::Config& config() { return stream_config_; }
	rtc::scoped_refptr<MockAudioMixer> audio_mixer() { return audio_mixer_; }
	MockChannelReceive* channel_receive() { return channel_receive_; }

	void SetupMockForGetStats() {
	using ::testing::DoAll;
	using ::testing::SetArgPointee;

	ASSERT_TRUE(channel_receive_);
	EXPECT_CALL(*channel_receive_, GetRTCPStatistics())
	.WillOnce(Return(kCallStats));
	EXPECT_CALL(*channel_receive_, GetDelayEstimate())
	.WillOnce(Return(kJitterBufferDelay + kPlayoutBufferDelay));
	EXPECT_CALL(*channel_receive_, GetSpeechOutputLevelFullRange())
	.WillOnce(Return(kSpeechOutputLevel));
	EXPECT_CALL(*channel_receive_, GetTotalOutputEnergy())
	.WillOnce(Return(kTotalOutputEnergy));
	EXPECT_CALL(*channel_receive_, GetTotalOutputDuration())
	.WillOnce(Return(kTotalOutputDuration));
	EXPECT_CALL(*channel_receive_, GetNetworkStatistics(_))
	.WillOnce(Return(kNetworkStats));
	EXPECT_CALL(*channel_receive_, GetDecodingCallStatistics())
	.WillOnce(Return(kAudioDecodeStats));
	EXPECT_CALL(*channel_receive_, GetReceiveCodec())
	.WillOnce(Return(kReceiveCodec));
	EXPECT_CALL(*channel_receive_, GetCurrentEstimatedPlayoutNtpTimestampMs(_))
	.WillOnce(Return(kPlayoutNtpTimestampMs));
	}

	private:
	PacketRouter packet_router_;
	rtc::scoped_refptr<AudioState> audio_state_;
	rtc::scoped_refptr<MockAudioMixer> audio_mixer_;
	AudioReceiveStreamInterface::Config stream_config_;
	::testing::StrictMock<MockChannelReceive>* channel_receive_ = nullptr;
	RtpStreamReceiverController rtp_stream_receiver_controller_;
	MockTransport rtcp_send_transport_;
	};

	const std::vector<uint8_t> CreateRtcpSenderReport() {
	std::vector<uint8_t> packet;
	const size_t kRtcpSrLength = 28; // In bytes.
	packet.resize(kRtcpSrLength);
	packet[0] = 0x80; // Version 2.
	packet[1] = 0xc8; // PT = 200, SR.
	// Length in number of 32-bit words - 1.
	ByteWriter<uint16_t>::WriteBigEndian(&packet[2], 6);
	ByteWriter<uint32_t>::WriteBigEndian(&packet[4], kLocalSsrc);
	return packet;
	}
	} // namespace

	TEST(AudioReceiveStreamTest, ConfigToString) {
	AudioReceiveStreamInterface::Config config;
	config.rtp.remote_ssrc = kRemoteSsrc;
	config.rtp.local_ssrc = kLocalSsrc;
	config.rtp.rtcp_mode = RtcpMode::kOff;
	EXPECT_EQ(
	"{rtp: {remote_ssrc: 1234, local_ssrc: 5678, nack: "
	"{rtp_history_ms: 0}, rtcp: off}, "
	"rtcp_send_transport: null}",
	config.ToString());
	}

	TEST(AudioReceiveStreamTest, ConstructDestruct) {
	test::RunLoop loop;
	for (bool use_null_audio_processing : {false, true}) {
	ConfigHelper helper(use_null_audio_processing);
	auto recv_stream = helper.CreateAudioReceiveStream();
	recv_stream->UnregisterFromTransport();
	}
	}

	TEST(AudioReceiveStreamTest, ReceiveRtcpPacket) {
	test::RunLoop loop;
	for (bool use_null_audio_processing : {false, true}) {
	ConfigHelper helper(use_null_audio_processing);
	auto recv_stream = helper.CreateAudioReceiveStream();
	std::vector<uint8_t> rtcp_packet = CreateRtcpSenderReport();
	EXPECT_CALL(*helper.channel_receive(),
	ReceivedRTCPPacket(&rtcp_packet[0], rtcp_packet.size()))
	.WillOnce(Return());
	recv_stream->DeliverRtcp(&rtcp_packet[0], rtcp_packet.size());
	recv_stream->UnregisterFromTransport();
	}
	}

	TEST(AudioReceiveStreamTest, GetStats) {
	test::RunLoop loop;
	for (bool use_null_audio_processing : {false, true}) {
	ConfigHelper helper(use_null_audio_processing);
	auto recv_stream = helper.CreateAudioReceiveStream();
	helper.SetupMockForGetStats();
	AudioReceiveStreamInterface::Stats stats =
	recv_stream->GetStats(/get_and_clear_legacy_stats=/true);
	EXPECT_EQ(kRemoteSsrc, stats.remote_ssrc);
	EXPECT_EQ(kCallStats.payload_bytes_received, stats.payload_bytes_received);
	EXPECT_EQ(kCallStats.header_and_padding_bytes_received,
	stats.header_and_padding_bytes_received);
	EXPECT_EQ(static_cast<uint32_t>(kCallStats.packetsReceived),
	stats.packets_received);
	EXPECT_EQ(kCallStats.cumulativeLost, stats.packets_lost);
	EXPECT_EQ(kReceiveCodec.second.name, stats.codec_name);
	EXPECT_EQ(
	kCallStats.jitterSamples / (kReceiveCodec.second.clockrate_hz / 1000),
	stats.jitter_ms);
	EXPECT_EQ(kNetworkStats.currentBufferSize, stats.jitter_buffer_ms);
	EXPECT_EQ(kNetworkStats.preferredBufferSize,
	stats.jitter_buffer_preferred_ms);
	EXPECT_EQ(static_cast<uint32_t>(kJitterBufferDelay + kPlayoutBufferDelay),
	stats.delay_estimate_ms);
	EXPECT_EQ(static_cast<int32_t>(kSpeechOutputLevel), stats.audio_level);
	EXPECT_EQ(kTotalOutputEnergy, stats.total_output_energy);
	EXPECT_EQ(kNetworkStats.totalSamplesReceived, stats.total_samples_received);
	EXPECT_EQ(kTotalOutputDuration, stats.total_output_duration);
	EXPECT_EQ(kNetworkStats.concealedSamples, stats.concealed_samples);
	EXPECT_EQ(kNetworkStats.concealmentEvents, stats.concealment_events);
	EXPECT_EQ(static_cast<double>(kNetworkStats.jitterBufferDelayMs) /
	static_cast<double>(rtc::kNumMillisecsPerSec),
	stats.jitter_buffer_delay_seconds);
	EXPECT_EQ(kNetworkStats.jitterBufferEmittedCount,
	stats.jitter_buffer_emitted_count);
	EXPECT_EQ(static_cast<double>(kNetworkStats.jitterBufferTargetDelayMs) /
	static_cast<double>(rtc::kNumMillisecsPerSec),
	stats.jitter_buffer_target_delay_seconds);
	EXPECT_EQ(static_cast<double>(kNetworkStats.jitterBufferMinimumDelayMs) /
	static_cast<double>(rtc::kNumMillisecsPerSec),
	stats.jitter_buffer_minimum_delay_seconds);
	EXPECT_EQ(kNetworkStats.insertedSamplesForDeceleration,
	stats.inserted_samples_for_deceleration);
	EXPECT_EQ(kNetworkStats.removedSamplesForAcceleration,
	stats.removed_samples_for_acceleration);
	EXPECT_EQ(kNetworkStats.fecPacketsReceived, stats.fec_packets_received);
	EXPECT_EQ(kNetworkStats.fecPacketsDiscarded, stats.fec_packets_discarded);
	EXPECT_EQ(static_cast<double>(kNetworkStats.totalProcessingDelayUs) /
	static_cast<double>(rtc::kNumMicrosecsPerSec),
	stats.total_processing_delay_seconds);
	EXPECT_EQ(kNetworkStats.packetsDiscarded, stats.packets_discarded);
	EXPECT_EQ(Q14ToFloat(kNetworkStats.currentExpandRate), stats.expand_rate);
	EXPECT_EQ(Q14ToFloat(kNetworkStats.currentSpeechExpandRate),
	stats.speech_expand_rate);
	EXPECT_EQ(Q14ToFloat(kNetworkStats.currentSecondaryDecodedRate),
	stats.secondary_decoded_rate);
	EXPECT_EQ(Q14ToFloat(kNetworkStats.currentSecondaryDiscardedRate),
	stats.secondary_discarded_rate);
	EXPECT_EQ(Q14ToFloat(kNetworkStats.currentAccelerateRate),
	stats.accelerate_rate);
	EXPECT_EQ(Q14ToFloat(kNetworkStats.currentPreemptiveRate),
	stats.preemptive_expand_rate);
	EXPECT_EQ(kNetworkStats.packetBufferFlushes, stats.jitter_buffer_flushes);
	EXPECT_EQ(kNetworkStats.delayedPacketOutageSamples,
	stats.delayed_packet_outage_samples);
	EXPECT_EQ(static_cast<double>(kNetworkStats.relativePacketArrivalDelayMs) /
	static_cast<double>(rtc::kNumMillisecsPerSec),
	stats.relative_packet_arrival_delay_seconds);
	EXPECT_EQ(kNetworkStats.interruptionCount, stats.interruption_count);
	EXPECT_EQ(kNetworkStats.totalInterruptionDurationMs,
	stats.total_interruption_duration_ms);

	EXPECT_EQ(kAudioDecodeStats.calls_to_silence_generator,
	stats.decoding_calls_to_silence_generator);
	EXPECT_EQ(kAudioDecodeStats.calls_to_neteq, stats.decoding_calls_to_neteq);
	EXPECT_EQ(kAudioDecodeStats.decoded_normal, stats.decoding_normal);
	EXPECT_EQ(kAudioDecodeStats.decoded_neteq_plc, stats.decoding_plc);
	EXPECT_EQ(kAudioDecodeStats.decoded_codec_plc, stats.decoding_codec_plc);
	EXPECT_EQ(kAudioDecodeStats.decoded_cng, stats.decoding_cng);
	EXPECT_EQ(kAudioDecodeStats.decoded_plc_cng, stats.decoding_plc_cng);
	EXPECT_EQ(kAudioDecodeStats.decoded_muted_output,
	stats.decoding_muted_output);
	EXPECT_EQ(kCallStats.capture_start_ntp_time_ms_,
	stats.capture_start_ntp_time_ms);
	EXPECT_EQ(kPlayoutNtpTimestampMs, stats.estimated_playout_ntp_timestamp_ms);
	recv_stream->UnregisterFromTransport();
	}
	}

	TEST(AudioReceiveStreamTest, SetGain) {
	test::RunLoop loop;
	for (bool use_null_audio_processing : {false, true}) {
	ConfigHelper helper(use_null_audio_processing);
	auto recv_stream = helper.CreateAudioReceiveStream();
	EXPECT_CALL(*helper.channel_receive(),
	SetChannelOutputVolumeScaling(FloatEq(0.765f)));
	recv_stream->SetGain(0.765f);
	recv_stream->UnregisterFromTransport();
	}
	}

	TEST(AudioReceiveStreamTest, StreamsShouldBeAddedToMixerOnceOnStart) {
	test::RunLoop loop;
	for (bool use_null_audio_processing : {false, true}) {
	ConfigHelper helper1(use_null_audio_processing);
	ConfigHelper helper2(helper1.audio_mixer(), use_null_audio_processing);
	auto recv_stream1 = helper1.CreateAudioReceiveStream();
	auto recv_stream2 = helper2.CreateAudioReceiveStream();

	EXPECT_CALL(*helper1.channel_receive(), StartPlayout()).Times(1);
	EXPECT_CALL(*helper2.channel_receive(), StartPlayout()).Times(1);
	EXPECT_CALL(*helper1.channel_receive(), StopPlayout()).Times(1);
	EXPECT_CALL(*helper2.channel_receive(), StopPlayout()).Times(1);
	EXPECT_CALL(*helper1.audio_mixer(), AddSource(recv_stream1.get()))
	.WillOnce(Return(true));
	EXPECT_CALL(*helper1.audio_mixer(), AddSource(recv_stream2.get()))
	.WillOnce(Return(true));
	EXPECT_CALL(*helper1.audio_mixer(), RemoveSource(recv_stream1.get()))
	.Times(1);
	EXPECT_CALL(*helper1.audio_mixer(), RemoveSource(recv_stream2.get()))
	.Times(1);

	recv_stream1->Start();
	recv_stream2->Start();

	// One more should not result in any more mixer sources added.
	recv_stream1->Start();

	// Stop stream before it is being destructed.
	recv_stream2->Stop();

	recv_stream1->UnregisterFromTransport();
	recv_stream2->UnregisterFromTransport();
	}
	}

	TEST(AudioReceiveStreamTest, ReconfigureWithUpdatedConfig) {
	test::RunLoop loop;
	for (bool use_null_audio_processing : {false, true}) {
	ConfigHelper helper(use_null_audio_processing);
	auto recv_stream = helper.CreateAudioReceiveStream();

	auto new_config = helper.config();

	MockChannelReceive& channel_receive = *helper.channel_receive();

	// TODO(tommi, nisse): This applies new extensions to the internal config,
	// but there's nothing that actually verifies that the changes take effect.
	// In fact Call manages the extensions separately in Call::ReceiveRtpConfig
	// and changing this config value (there seem to be a few copies), doesn't
	// affect that logic.
	recv_stream->ReconfigureForTesting(new_config);

	new_config.decoder_map.emplace(1, SdpAudioFormat("foo", 8000, 1));
	EXPECT_CALL(channel_receive, SetReceiveCodecs(new_config.decoder_map));
	recv_stream->SetDecoderMap(new_config.decoder_map);

	EXPECT_CALL(channel_receive, SetNACKStatus(true, 15 + 1)).Times(1);
	recv_stream->SetNackHistory(300 + 20);

	recv_stream->UnregisterFromTransport();
	}
	}

	TEST(AudioReceiveStreamTest, ReconfigureWithFrameDecryptor) {
	test::RunLoop loop;
	for (bool use_null_audio_processing : {false, true}) {
	ConfigHelper helper(use_null_audio_processing);
	auto recv_stream = helper.CreateAudioReceiveStream();

	auto new_config_0 = helper.config();
	rtc::scoped_refptr<FrameDecryptorInterface> mock_frame_decryptor_0(
	rtc::make_ref_counted<MockFrameDecryptor>());
	new_config_0.frame_decryptor = mock_frame_decryptor_0;

	// TODO(tommi): While this changes the internal config value, it doesn't
	// actually change what frame_decryptor is used. WebRtcAudioReceiveStream
	// recreates the whole instance in order to change this value.
	// So, it's not clear if changing this post initialization needs to be
	// supported.
	recv_stream->ReconfigureForTesting(new_config_0);

	auto new_config_1 = helper.config();
	rtc::scoped_refptr<FrameDecryptorInterface> mock_frame_decryptor_1(
	rtc::make_ref_counted<MockFrameDecryptor>());
	new_config_1.frame_decryptor = mock_frame_decryptor_1;
	new_config_1.crypto_options.sframe.require_frame_encryption = true;
	recv_stream->ReconfigureForTesting(new_config_1);
	recv_stream->UnregisterFromTransport();
	}
	}

	} // namespace test
	} // namespace webrtc