webrtc/audio/audio_receive_stream_unittest.cc

/*
 *  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 "testing/gtest/include/gtest/gtest.h"

#include "webrtc/audio/audio_receive_stream.h"
#include "webrtc/audio/conversion.h"
#include "webrtc/modules/remote_bitrate_estimator/include/mock/mock_remote_bitrate_estimator.h"
#include "webrtc/modules/rtp_rtcp/source/byte_io.h"
#include "webrtc/test/mock_voice_engine.h"

namespace webrtc {
namespace test {
namespace {

const int kChannelId = 2;
const uint32_t kRemoteSsrc = 1234;
const uint32_t kLocalSsrc = 5678;
const size_t kAbsoluteSendTimeLength = 4;

void BuildAbsoluteSendTimeExtension(uint8_t* buffer,
                                    int id,
                                    uint32_t abs_send_time) {
  const size_t kRtpOneByteHeaderLength = 4;
  const uint16_t kRtpOneByteHeaderExtensionId = 0xBEDE;
  ByteWriter<uint16_t>::WriteBigEndian(buffer, kRtpOneByteHeaderExtensionId);

  const uint32_t kPosLength = 2;
  ByteWriter<uint16_t>::WriteBigEndian(buffer + kPosLength,
                                       kAbsoluteSendTimeLength / 4);

  const uint8_t kLengthOfData = 3;
  buffer[kRtpOneByteHeaderLength] = (id << 4) + (kLengthOfData - 1);
  ByteWriter<uint32_t, kLengthOfData>::WriteBigEndian(
      buffer + kRtpOneByteHeaderLength + 1, abs_send_time);
}

size_t CreateRtpHeaderWithAbsSendTime(uint8_t* header,
                                      int extension_id,
                                      uint32_t abs_send_time) {
  header[0] = 0x80;   // Version 2.
  header[0] |= 0x10;  // Set extension bit.
  header[1] = 100;    // Payload type.
  header[1] |= 0x80;  // Marker bit is set.
  ByteWriter<uint16_t>::WriteBigEndian(header + 2, 0x1234);  // Sequence number.
  ByteWriter<uint32_t>::WriteBigEndian(header + 4, 0x5678);  // Timestamp.
  ByteWriter<uint32_t>::WriteBigEndian(header + 8, 0x4321);  // SSRC.
  int32_t rtp_header_length = webrtc::kRtpHeaderSize;

  BuildAbsoluteSendTimeExtension(header + rtp_header_length, extension_id,
                                 abs_send_time);
  rtp_header_length += kAbsoluteSendTimeLength;
  return rtp_header_length;
}
}  // namespace

TEST(AudioReceiveStreamTest, ConfigToString) {
  const int kAbsSendTimeId = 3;
  AudioReceiveStream::Config config;
  config.rtp.remote_ssrc = kRemoteSsrc;
  config.rtp.local_ssrc = kLocalSsrc;
  config.rtp.extensions.push_back(
      RtpExtension(RtpExtension::kAbsSendTime, kAbsSendTimeId));
  config.voe_channel_id = kChannelId;
  config.combined_audio_video_bwe = true;
  EXPECT_EQ(
      "{rtp: {remote_ssrc: 1234, local_ssrc: 5678, extensions: [{name: "
      "http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time, id: 3}]}, "
      "receive_transport: nullptr, rtcp_send_transport: nullptr, "
      "voe_channel_id: 2, combined_audio_video_bwe: true}",
      config.ToString());
}

TEST(AudioReceiveStreamTest, ConstructDestruct) {
  MockRemoteBitrateEstimator remote_bitrate_estimator;
  MockVoiceEngine voice_engine;
  AudioReceiveStream::Config config;
  config.voe_channel_id = kChannelId;
  internal::AudioReceiveStream recv_stream(&remote_bitrate_estimator, config,
                                           &voice_engine);
}

TEST(AudioReceiveStreamTest, AudioPacketUpdatesBweWithTimestamp) {
  MockRemoteBitrateEstimator remote_bitrate_estimator;
  MockVoiceEngine voice_engine;
  AudioReceiveStream::Config config;
  config.combined_audio_video_bwe = true;
  config.voe_channel_id = kChannelId;
  const int kAbsSendTimeId = 3;
  config.rtp.extensions.push_back(
      RtpExtension(RtpExtension::kAbsSendTime, kAbsSendTimeId));
  internal::AudioReceiveStream recv_stream(&remote_bitrate_estimator, config,
                                           &voice_engine);
  uint8_t rtp_packet[30];
  const int kAbsSendTimeValue = 1234;
  CreateRtpHeaderWithAbsSendTime(rtp_packet, kAbsSendTimeId, kAbsSendTimeValue);
  PacketTime packet_time(5678000, 0);
  const size_t kExpectedHeaderLength = 20;
  EXPECT_CALL(remote_bitrate_estimator,
              IncomingPacket(packet_time.timestamp / 1000,
                             sizeof(rtp_packet) - kExpectedHeaderLength,
                             testing::_, false))
      .Times(1);
  EXPECT_TRUE(
      recv_stream.DeliverRtp(rtp_packet, sizeof(rtp_packet), packet_time));
}

TEST(AudioReceiveStreamTest, GetStats) {
  const int kJitterBufferDelay = -7;
  const int kPlayoutBufferDelay = 302;
  const unsigned int kSpeechOutputLevel = 99;
  const CallStatistics kCallStats = {345,  678,  901, 234, -12,
                                     3456, 7890, 567, 890, 123};

  const CodecInst kCodecInst = {123, "codec_name_recv", 96000, -187, -198,
                                -103};

  const NetworkStatistics kNetworkStats = {
      123, 456, false, 0, 0, 789, 12, 345, 678, 901, -1, -1, -1, -1, -1, 0};

  webrtc::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_plc = 123;
    audio_decode_stats.decoded_cng = 456;
    audio_decode_stats.decoded_plc_cng = 789;
  }

  MockRemoteBitrateEstimator remote_bitrate_estimator;
  MockVoiceEngine voice_engine;
  AudioReceiveStream::Config config;
  config.rtp.remote_ssrc = kRemoteSsrc;
  config.voe_channel_id = kChannelId;
  internal::AudioReceiveStream recv_stream(&remote_bitrate_estimator, config,
                                           &voice_engine);

  using testing::_;
  using testing::DoAll;
  using testing::Return;
  using testing::SetArgPointee;
  using testing::SetArgReferee;
  EXPECT_CALL(voice_engine, GetRemoteSSRC(kChannelId, _))
      .WillOnce(DoAll(SetArgReferee<1>(0), Return(0)));
  EXPECT_CALL(voice_engine, GetRTCPStatistics(kChannelId, _))
      .WillOnce(DoAll(SetArgReferee<1>(kCallStats), Return(0)));
  EXPECT_CALL(voice_engine, GetRecCodec(kChannelId, _))
      .WillOnce(DoAll(SetArgReferee<1>(kCodecInst), Return(0)));
  EXPECT_CALL(voice_engine, GetDelayEstimate(kChannelId, _, _))
      .WillOnce(DoAll(SetArgPointee<1>(kJitterBufferDelay),
                      SetArgPointee<2>(kPlayoutBufferDelay), Return(0)));
  EXPECT_CALL(voice_engine, GetSpeechOutputLevelFullRange(kChannelId, _))
      .WillOnce(DoAll(SetArgReferee<1>(kSpeechOutputLevel), Return(0)));
  EXPECT_CALL(voice_engine, GetNetworkStatistics(kChannelId, _))
      .WillOnce(DoAll(SetArgReferee<1>(kNetworkStats), Return(0)));
  EXPECT_CALL(voice_engine, GetDecodingCallStatistics(kChannelId, _))
      .WillOnce(DoAll(SetArgPointee<1>(audio_decode_stats), Return(0)));

  AudioReceiveStream::Stats stats = recv_stream.GetStats();
  EXPECT_EQ(kRemoteSsrc, stats.remote_ssrc);
  EXPECT_EQ(static_cast<int64_t>(kCallStats.bytesReceived), stats.bytes_rcvd);
  EXPECT_EQ(static_cast<uint32_t>(kCallStats.packetsReceived),
            stats.packets_rcvd);
  EXPECT_EQ(kCallStats.cumulativeLost, stats.packets_lost);
  EXPECT_EQ(Q8ToFloat(kCallStats.fractionLost), stats.fraction_lost);
  EXPECT_EQ(std::string(kCodecInst.plname), stats.codec_name);
  EXPECT_EQ(kCallStats.extendedMax, stats.ext_seqnum);
  EXPECT_EQ(kCallStats.jitterSamples / (kCodecInst.plfreq / 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(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.currentAccelerateRate),
            stats.accelerate_rate);
  EXPECT_EQ(Q14ToFloat(kNetworkStats.currentPreemptiveRate),
            stats.preemptive_expand_rate);
  EXPECT_EQ(audio_decode_stats.calls_to_silence_generator,
            stats.decoding_calls_to_silence_generator);
  EXPECT_EQ(audio_decode_stats.calls_to_neteq, stats.decoding_calls_to_neteq);
  EXPECT_EQ(audio_decode_stats.decoded_normal, stats.decoding_normal);
  EXPECT_EQ(audio_decode_stats.decoded_plc, stats.decoding_plc);
  EXPECT_EQ(audio_decode_stats.decoded_cng, stats.decoding_cng);
  EXPECT_EQ(audio_decode_stats.decoded_plc_cng, stats.decoding_plc_cng);
  EXPECT_EQ(kCallStats.capture_start_ntp_time_ms_,
            stats.capture_start_ntp_time_ms);
}
}  // namespace test
}  // namespace webrtc