RTCInboundRTPStreamStats[1] added.

Not all stats are collected in this CL, this must be addressed before
closing the issue.

[1] https://w3c.github.io/webrtc-stats/#inboundrtpstats-dict*

  Re-landed after having to be reverted
  https://codereview.webrtc.org/2470683002/ due to depending on a CL
  that was reverted. Now that that has re-landed
  https://codereview.webrtc.org/2470703002/ this is ready to re-land.

BUG=chromium:627816, chromium:657855, chromium:657854
R=hta@webrtc.org
TBR=deadbeef@webrtc.org

Review-Url: https://codereview.webrtc.org/2465173003
Cr-Commit-Position: refs/heads/master@{#14868}
diff --git a/webrtc/api/rtcstatscollector.cc b/webrtc/api/rtcstatscollector.cc
index 543181e..b14b396 100644
--- a/webrtc/api/rtcstatscollector.cc
+++ b/webrtc/api/rtcstatscollector.cc
@@ -53,6 +53,11 @@
       proxy_it->second, cricket::ICE_CANDIDATE_COMPONENT_RTP);
 }
 
+std::string RTCInboundRTPStreamStatsIDFromSSRC(bool audio, uint32_t ssrc) {
+  return audio ? "RTCInboundRTPAudioStream_" + rtc::ToString<>(ssrc)
+               : "RTCInboundRTPVideoStream_" + rtc::ToString<>(ssrc);
+}
+
 std::string RTCOutboundRTPStreamStatsIDFromSSRC(bool audio, uint32_t ssrc) {
   return audio ? "RTCOutboundRTPAudioStream_" + rtc::ToString<>(ssrc)
                : "RTCOutboundRTPVideoStream_" + rtc::ToString<>(ssrc);
@@ -88,6 +93,42 @@
   }
 }
 
+void SetInboundRTPStreamStatsFromMediaReceiverInfo(
+    const cricket::MediaReceiverInfo& media_receiver_info,
+    RTCInboundRTPStreamStats* inbound_stats) {
+  RTC_DCHECK(inbound_stats);
+  inbound_stats->ssrc = rtc::ToString<>(media_receiver_info.ssrc());
+  // TODO(hbos): Support the remote case. crbug.com/657855
+  inbound_stats->is_remote = false;
+  // TODO(hbos): Set |codec_id| when we have |RTCCodecStats|. Maybe relevant:
+  // |media_receiver_info.codec_name|. crbug.com/657854, 657855, 659117
+  inbound_stats->packets_received =
+      static_cast<uint32_t>(media_receiver_info.packets_rcvd);
+  inbound_stats->bytes_received =
+      static_cast<uint64_t>(media_receiver_info.bytes_rcvd);
+  inbound_stats->fraction_lost =
+      static_cast<double>(media_receiver_info.fraction_lost);
+}
+
+void SetInboundRTPStreamStatsFromVoiceReceiverInfo(
+    const cricket::VoiceReceiverInfo& voice_receiver_info,
+    RTCInboundRTPStreamStats* inbound_stats) {
+  SetInboundRTPStreamStatsFromMediaReceiverInfo(
+      voice_receiver_info, inbound_stats);
+  inbound_stats->media_type = "audio";
+  inbound_stats->jitter =
+      static_cast<double>(voice_receiver_info.jitter_ms) /
+          rtc::kNumMillisecsPerSec;
+}
+
+void SetInboundRTPStreamStatsFromVideoReceiverInfo(
+    const cricket::VideoReceiverInfo& video_receiver_info,
+    RTCInboundRTPStreamStats* inbound_stats) {
+  SetInboundRTPStreamStatsFromMediaReceiverInfo(
+      video_receiver_info, inbound_stats);
+  inbound_stats->media_type = "video";
+}
+
 void SetOutboundRTPStreamStatsFromMediaSenderInfo(
     const cricket::MediaSenderInfo& media_sender_info,
     RTCOutboundRTPStreamStats* outbound_stats) {
@@ -460,6 +501,25 @@
     if (pc_->session()->voice_channel()->GetStats(&voice_media_info)) {
       std::string transport_id = RTCTransportStatsIDFromBaseChannel(
           session_stats.proxy_to_transport, *pc_->session()->voice_channel());
+      RTC_DCHECK(!transport_id.empty());
+      // Inbound
+      for (const cricket::VoiceReceiverInfo& voice_receiver_info :
+           voice_media_info.receivers) {
+        // TODO(nisse): SSRC == 0 currently means none. Delete check when that
+        // is fixed.
+        if (voice_receiver_info.ssrc() == 0)
+          continue;
+        std::unique_ptr<RTCInboundRTPStreamStats> inbound_audio(
+            new RTCInboundRTPStreamStats(
+                RTCInboundRTPStreamStatsIDFromSSRC(
+                    true, voice_receiver_info.ssrc()),
+                timestamp_us));
+        SetInboundRTPStreamStatsFromVoiceReceiverInfo(
+            voice_receiver_info, inbound_audio.get());
+        inbound_audio->transport_id = transport_id;
+        report->AddStats(std::move(inbound_audio));
+      }
+      // Outbound
       for (const cricket::VoiceSenderInfo& voice_sender_info :
            voice_media_info.senders) {
         // TODO(nisse): SSRC == 0 currently means none. Delete check when that
@@ -473,8 +533,7 @@
                 timestamp_us));
         SetOutboundRTPStreamStatsFromVoiceSenderInfo(
             voice_sender_info, outbound_audio.get());
-        if (!transport_id.empty())
-          outbound_audio->transport_id = transport_id;
+        outbound_audio->transport_id = transport_id;
         report->AddStats(std::move(outbound_audio));
       }
     }
@@ -485,6 +544,25 @@
     if (pc_->session()->video_channel()->GetStats(&video_media_info)) {
       std::string transport_id = RTCTransportStatsIDFromBaseChannel(
           session_stats.proxy_to_transport, *pc_->session()->video_channel());
+      RTC_DCHECK(!transport_id.empty());
+      // Inbound
+      for (const cricket::VideoReceiverInfo& video_receiver_info :
+           video_media_info.receivers) {
+        // TODO(nisse): SSRC == 0 currently means none. Delete check when that
+        // is fixed.
+        if (video_receiver_info.ssrc() == 0)
+          continue;
+        std::unique_ptr<RTCInboundRTPStreamStats> inbound_video(
+            new RTCInboundRTPStreamStats(
+                RTCInboundRTPStreamStatsIDFromSSRC(
+                    false, video_receiver_info.ssrc()),
+                timestamp_us));
+        SetInboundRTPStreamStatsFromVideoReceiverInfo(
+            video_receiver_info, inbound_video.get());
+        inbound_video->transport_id = transport_id;
+        report->AddStats(std::move(inbound_video));
+      }
+      // Outbound
       for (const cricket::VideoSenderInfo& video_sender_info :
            video_media_info.senders) {
         // TODO(nisse): SSRC == 0 currently means none. Delete check when that
@@ -498,8 +576,7 @@
                 timestamp_us));
         SetOutboundRTPStreamStatsFromVideoSenderInfo(
             video_sender_info, outbound_video.get());
-        if (!transport_id.empty())
-          outbound_video->transport_id = transport_id;
+        outbound_video->transport_id = transport_id;
         report->AddStats(std::move(outbound_video));
       }
     }
diff --git a/webrtc/api/rtcstatscollector.h b/webrtc/api/rtcstatscollector.h
index fbef118..2c160ee 100644
--- a/webrtc/api/rtcstatscollector.h
+++ b/webrtc/api/rtcstatscollector.h
@@ -101,9 +101,7 @@
   // Produces |RTCPeerConnectionStats|.
   void ProducePeerConnectionStats_s(
       int64_t timestamp_us, RTCStatsReport* report) const;
-  // Produces |RTCOutboundRTPStreamStats|. TODO(hbos): Produce both types of
-  // |RTCRTPStreamStats|, the other one being |RTCInboundRTPStreamStats|.
-  // crbug.com/657855
+  // Produces |RTCInboundRTPStreamStats| and |RTCOutboundRTPStreamStats|.
   void ProduceRTPStreamStats_s(
       int64_t timestamp_us, const SessionStats& session_stats,
       RTCStatsReport* report) const;
diff --git a/webrtc/api/rtcstatscollector_unittest.cc b/webrtc/api/rtcstatscollector_unittest.cc
index 312f0d2..808668b 100644
--- a/webrtc/api/rtcstatscollector_unittest.cc
+++ b/webrtc/api/rtcstatscollector_unittest.cc
@@ -70,6 +70,10 @@
   *os << stats.ToString();
 }
 
+void PrintTo(const RTCInboundRTPStreamStats& stats, ::std::ostream* os) {
+  *os << stats.ToString();
+}
+
 void PrintTo(const RTCOutboundRTPStreamStats& stats, ::std::ostream* os) {
   *os << stats.ToString();
 }
@@ -975,6 +979,116 @@
   }
 }
 
+TEST_F(RTCStatsCollectorTest, CollectRTCInboundRTPStreamStats_Audio) {
+  MockVoiceMediaChannel* voice_media_channel = new MockVoiceMediaChannel();
+  cricket::VoiceChannel voice_channel(
+      test_->worker_thread(), test_->network_thread(), test_->media_engine(),
+      voice_media_channel, nullptr, "VoiceContentName", false);
+
+  cricket::VoiceMediaInfo voice_media_info;
+  voice_media_info.receivers.push_back(cricket::VoiceReceiverInfo());
+  voice_media_info.receivers[0].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  voice_media_info.receivers[0].local_stats[0].ssrc = 1;
+  voice_media_info.receivers[0].packets_rcvd = 2;
+  voice_media_info.receivers[0].bytes_rcvd = 3;
+  voice_media_info.receivers[0].jitter_ms = 4500;
+  voice_media_info.receivers[0].fraction_lost = 5.5f;
+  EXPECT_CALL(*voice_media_channel, GetStats(_))
+      .WillOnce(DoAll(SetArgPointee<0>(voice_media_info), Return(true)));
+
+  SessionStats session_stats;
+  session_stats.proxy_to_transport["VoiceContentName"] = "TransportName";
+  session_stats.transport_stats["TransportName"].transport_name =
+      "TransportName";
+
+  // Make sure the associated |RTCTransportStats| is created.
+  cricket::TransportChannelStats channel_stats;
+  channel_stats.component = cricket::ICE_CANDIDATE_COMPONENT_RTP;
+  session_stats.transport_stats["TransportName"].channel_stats.push_back(
+      channel_stats);
+
+  EXPECT_CALL(test_->session(), GetTransportStats(_))
+      .WillRepeatedly(DoAll(SetArgPointee<0>(session_stats), Return(true)));
+  EXPECT_CALL(test_->session(), voice_channel())
+      .WillRepeatedly(Return(&voice_channel));
+
+  rtc::scoped_refptr<const RTCStatsReport> report = GetStatsReport();
+
+  RTCInboundRTPStreamStats expected_audio(
+      "RTCInboundRTPAudioStream_1", report->timestamp_us());
+  expected_audio.ssrc = "1";
+  expected_audio.is_remote = false;
+  expected_audio.media_type = "audio";
+  expected_audio.transport_id = "RTCTransport_TransportName_" +
+      rtc::ToString<>(cricket::ICE_CANDIDATE_COMPONENT_RTP);
+  expected_audio.packets_received = 2;
+  expected_audio.bytes_received = 3;
+  expected_audio.jitter = 4.5;
+  expected_audio.fraction_lost = 5.5;
+
+  ASSERT(report->Get(expected_audio.id()));
+  const RTCInboundRTPStreamStats& audio = report->Get(
+      expected_audio.id())->cast_to<RTCInboundRTPStreamStats>();
+  EXPECT_EQ(audio, expected_audio);
+
+  EXPECT_TRUE(report->Get(*expected_audio.transport_id));
+}
+
+TEST_F(RTCStatsCollectorTest, CollectRTCInboundRTPStreamStats_Video) {
+  MockVideoMediaChannel* video_media_channel = new MockVideoMediaChannel();
+  cricket::VideoChannel video_channel(
+      test_->worker_thread(), test_->network_thread(), video_media_channel,
+      nullptr, "VideoContentName", false);
+
+  cricket::VideoMediaInfo video_media_info;
+  video_media_info.receivers.push_back(cricket::VideoReceiverInfo());
+  video_media_info.receivers[0].local_stats.push_back(
+      cricket::SsrcReceiverInfo());
+  video_media_info.receivers[0].local_stats[0].ssrc = 1;
+  video_media_info.receivers[0].packets_rcvd = 2;
+  video_media_info.receivers[0].bytes_rcvd = 3;
+  video_media_info.receivers[0].fraction_lost = 4.5f;
+  EXPECT_CALL(*video_media_channel, GetStats(_))
+      .WillOnce(DoAll(SetArgPointee<0>(video_media_info), Return(true)));
+
+  SessionStats session_stats;
+  session_stats.proxy_to_transport["VideoContentName"] = "TransportName";
+  session_stats.transport_stats["TransportName"].transport_name =
+      "TransportName";
+
+  // Make sure the associated |RTCTransportStats| is created.
+  cricket::TransportChannelStats channel_stats;
+  channel_stats.component = cricket::ICE_CANDIDATE_COMPONENT_RTP;
+  session_stats.transport_stats["TransportName"].channel_stats.push_back(
+      channel_stats);
+
+  EXPECT_CALL(test_->session(), GetTransportStats(_))
+      .WillRepeatedly(DoAll(SetArgPointee<0>(session_stats), Return(true)));
+  EXPECT_CALL(test_->session(), video_channel())
+      .WillRepeatedly(Return(&video_channel));
+
+  rtc::scoped_refptr<const RTCStatsReport> report = GetStatsReport();
+
+  RTCInboundRTPStreamStats expected_audio(
+      "RTCInboundRTPVideoStream_1", report->timestamp_us());
+  expected_audio.ssrc = "1";
+  expected_audio.is_remote = false;
+  expected_audio.media_type = "video";
+  expected_audio.transport_id = "RTCTransport_TransportName_" +
+      rtc::ToString<>(cricket::ICE_CANDIDATE_COMPONENT_RTP);
+  expected_audio.packets_received = 2;
+  expected_audio.bytes_received = 3;
+  expected_audio.fraction_lost = 4.5;
+
+  ASSERT(report->Get(expected_audio.id()));
+  const RTCInboundRTPStreamStats& audio = report->Get(
+      expected_audio.id())->cast_to<RTCInboundRTPStreamStats>();
+  EXPECT_EQ(audio, expected_audio);
+
+  EXPECT_TRUE(report->Get(*expected_audio.transport_id));
+}
+
 TEST_F(RTCStatsCollectorTest, CollectRTCOutboundRTPStreamStats_Audio) {
   MockVoiceMediaChannel* voice_media_channel = new MockVoiceMediaChannel();
   cricket::VoiceChannel voice_channel(
@@ -987,7 +1101,7 @@
   voice_media_info.senders[0].local_stats[0].ssrc = 1;
   voice_media_info.senders[0].packets_sent = 2;
   voice_media_info.senders[0].bytes_sent = 3;
-  voice_media_info.senders[0].rtt_ms = 4500.0;
+  voice_media_info.senders[0].rtt_ms = 4500;
   EXPECT_CALL(*voice_media_channel, GetStats(_))
       .WillOnce(DoAll(SetArgPointee<0>(voice_media_info), Return(true)));
 
@@ -999,12 +1113,6 @@
   // Make sure the associated |RTCTransportStats| is created.
   cricket::TransportChannelStats channel_stats;
   channel_stats.component = cricket::ICE_CANDIDATE_COMPONENT_RTP;
-  cricket::ConnectionInfo connection_info;
-  connection_info.local_candidate = *CreateFakeCandidate(
-      "42.42.42.42", 42, "protocol", cricket::LOCAL_PORT_TYPE, 42).get();
-  connection_info.remote_candidate = *CreateFakeCandidate(
-      "42.42.42.42", 42, "protocol", cricket::LOCAL_PORT_TYPE, 42).get();
-  channel_stats.connection_infos.push_back(connection_info);
   session_stats.transport_stats["TransportName"].channel_stats.push_back(
       channel_stats);
 
@@ -1049,7 +1157,7 @@
   video_media_info.senders[0].nacks_rcvd = 4;
   video_media_info.senders[0].packets_sent = 5;
   video_media_info.senders[0].bytes_sent = 6;
-  video_media_info.senders[0].rtt_ms = 7500.0;
+  video_media_info.senders[0].rtt_ms = 7500;
   EXPECT_CALL(*video_media_channel, GetStats(_))
       .WillOnce(DoAll(SetArgPointee<0>(video_media_info), Return(true)));
 
@@ -1061,12 +1169,6 @@
   // Make sure the associated |RTCTransportStats| is created.
   cricket::TransportChannelStats channel_stats;
   channel_stats.component = cricket::ICE_CANDIDATE_COMPONENT_RTP;
-  cricket::ConnectionInfo connection_info;
-  connection_info.local_candidate = *CreateFakeCandidate(
-      "42.42.42.42", 42, "protocol", cricket::LOCAL_PORT_TYPE, 42).get();
-  connection_info.remote_candidate = *CreateFakeCandidate(
-      "42.42.42.42", 42, "protocol", cricket::LOCAL_PORT_TYPE, 42).get();
-  channel_stats.connection_infos.push_back(connection_info);
   session_stats.transport_stats["TransportName"].channel_stats.push_back(
       channel_stats);
 
diff --git a/webrtc/api/stats/rtcstats_objects.h b/webrtc/api/stats/rtcstats_objects.h
index 232e66b..4788a14 100644
--- a/webrtc/api/stats/rtcstats_objects.h
+++ b/webrtc/api/stats/rtcstats_objects.h
@@ -239,6 +239,48 @@
   RTCRTPStreamStats(std::string&& id, int64_t timestamp_us);
 };
 
+// https://w3c.github.io/webrtc-stats/#inboundrtpstats-dict*
+// TODO(hbos): Finish implementation and support the remote case
+// |is_remote = true|. Tracking bug crbug.com/657855
+class RTCInboundRTPStreamStats final : public RTCRTPStreamStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCInboundRTPStreamStats(const std::string& id, int64_t timestamp_us);
+  RTCInboundRTPStreamStats(std::string&& id, int64_t timestamp_us);
+  RTCInboundRTPStreamStats(const RTCInboundRTPStreamStats& other);
+  ~RTCInboundRTPStreamStats() override;
+
+  RTCStatsMember<uint32_t> packets_received;
+  RTCStatsMember<uint64_t> bytes_received;
+  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/657855
+  RTCStatsMember<uint32_t> packets_lost;
+  // TODO(hbos): Not collected in the "video" case by |RTCStatsCollector|.
+  // crbug.com/657855
+  RTCStatsMember<double> jitter;
+  RTCStatsMember<double> fraction_lost;
+  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/657855
+  RTCStatsMember<uint32_t> packets_discarded;
+  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/657855
+  RTCStatsMember<uint32_t> packets_repaired;
+  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/657855
+  RTCStatsMember<uint32_t> burst_packets_lost;
+  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/657855
+  RTCStatsMember<uint32_t> burst_packets_discarded;
+  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/657855
+  RTCStatsMember<uint32_t> burst_loss_count;
+  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/657855
+  RTCStatsMember<uint32_t> burst_discard_count;
+  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/657855
+  RTCStatsMember<double> burst_loss_rate;
+  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/657855
+  RTCStatsMember<double> burst_discard_rate;
+  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/657855
+  RTCStatsMember<double> gap_loss_rate;
+  // TODO(hbos): Not collected by |RTCStatsCollector|. crbug.com/657855
+  RTCStatsMember<double> gap_discard_rate;
+};
+
 // https://w3c.github.io/webrtc-stats/#outboundrtpstats-dict*
 // TODO(hbos): Finish implementation and support the remote case
 // |is_remote = true|. Tracking bug crbug.com/657856