Add LoudestFilter in ConferenceTransport

webrtc/voice_engine/test/auto_test/voe_conference_test.cc

Index: webrtc/voice_engine/test/auto_test/voe_conference_test.cc
diff --git a/webrtc/voice_engine/test/auto_test/voe_conference_test.cc b/webrtc/voice_engine/test/auto_test/voe_conference_test.cc
index 20a74b46b0880147edae791ffc36161b5be8fae6..caadae8cbdc97659c5c73dfeab42dc733cc52dac 100644
--- a/webrtc/voice_engine/test/auto_test/voe_conference_test.cc
+++ b/webrtc/voice_engine/test/auto_test/voe_conference_test.cc
@@ -14,6 +14,7 @@
 #include "webrtc/base/format_macros.h"
 #include "webrtc/base/timeutils.h"
 #include "webrtc/system_wrappers/interface/sleep.h"
+#include "webrtc/test/testsupport/fileutils.h"
 #include "webrtc/voice_engine/test/auto_test/fakes/conference_transport.h"
 
 namespace {
@@ -27,6 +28,10 @@ namespace {
 namespace voetest {
 
 TEST(VoeConferenceTest, RttAndStartNtpTime) {
+  const std::string kInputFileName =

[Andrew MacDonald, 2015/08/05 16:37:07]

nit: not a compile-time const.

[minyue-webrtc, 2015/08/06 13:31:22]

Done.

[minyue-webrtc, 2015/08/06 14:57:14]

Hi Andrew,

Per offline talk with Tina, I think I have not addressed your comment here
correctly. Do you suggest the that the name should not have a k-?

[Andrew MacDonald, 2015/08/13 19:48:11]

Right, it's not a compile-time const (i.e. can only be evaluated at run-time),
so should use input_file_name.

+      webrtc::test::ResourcePath("audio_coding/testfile32kHz", "pcm");
+  const webrtc::FileFormats kInputFormat = webrtc::kFileFormatPcm32kHzFile;
+
   struct Stats {
     Stats(int64_t rtt_receiver_1, int64_t rtt_receiver_2, int64_t ntp_delay)
         : rtt_receiver_1_(rtt_receiver_1),
@@ -42,8 +47,8 @@ TEST(VoeConferenceTest, RttAndStartNtpTime) {
   ConferenceTransport trans;
   trans.SetRtt(kRttMs);
 
-  unsigned int id_1 = trans.AddStream();
-  unsigned int id_2 = trans.AddStream();
+  unsigned int id_1 = trans.AddStream(kInputFileName, kInputFormat);
+  unsigned int id_2 = trans.AddStream(kInputFileName, kInputFormat);
 
   EXPECT_TRUE(trans.StartPlayout(id_1));
   // Start NTP time is the time when a stream is played out, rather than
@@ -105,4 +110,46 @@ TEST(VoeConferenceTest, RttAndStartNtpTime) {
     }
   }
 }
+
+
+TEST(VoeConferenceTest, ReceivedPackets) {
+  const std::string kInputFileName =
+      webrtc::test::ResourcePath("audio_coding/testfile32kHz", "pcm");
+  const webrtc::FileFormats kInputFormat = webrtc::kFileFormatPcm32kHzFile;
+  const int kPackets = 50;
+  const int kPacketDurationMs = 20;  // Correspond to Opus.
+
+  ConferenceTransport trans;
+  // Add silence to stream 0, so that it will be filtered out.
+  unsigned int id_0 = trans.AddStream(
+      webrtc::test::ResourcePath("audio_coding/silence", "pcm"),
+      kInputFormat);
+  unsigned int id_1 = trans.AddStream(kInputFileName, kInputFormat);
+  unsigned int id_2 = trans.AddStream(kInputFileName, kInputFormat);
+  unsigned int id_3 = trans.AddStream(kInputFileName, kInputFormat);
+
+  EXPECT_TRUE(trans.StartPlayout(id_0));
+  EXPECT_TRUE(trans.StartPlayout(id_1));
+  EXPECT_TRUE(trans.StartPlayout(id_2));
+  EXPECT_TRUE(trans.StartPlayout(id_3));
+
+  webrtc::SleepMs(kPacketDurationMs * kPackets);
+
+  webrtc::CallStatistics stats_0;
+  webrtc::CallStatistics stats_1;
+  webrtc::CallStatistics stats_2;
+  webrtc::CallStatistics stats_3;
+  EXPECT_TRUE(trans.GetReceiverStatistics(id_0, &stats_0));
+  EXPECT_TRUE(trans.GetReceiverStatistics(id_1, &stats_1));
+  EXPECT_TRUE(trans.GetReceiverStatistics(id_2, &stats_2));
+  EXPECT_TRUE(trans.GetReceiverStatistics(id_3, &stats_3));
+
+  // Cannot be accurate since stream 0 started the earliest.

[tlegrand-webrtc, 2015/08/05 13:32:44]

Can you explain this comment? I'm not following.

[minyue-webrtc, 2015/08/06 13:31:22]

I have updated the comments.

[tlegrand-webrtc, 2015/08/06 14:51:55]

Acknowledged.

+  EXPECT_NEAR(stats_0.packetsReceived, 0, 2);
+  // Cannot be accurate since it replies on the sleep timer.
+  EXPECT_NEAR(stats_1.packetsReceived, kPackets, 2);
+  EXPECT_NEAR(stats_2.packetsReceived, kPackets, 2);
+  EXPECT_NEAR(stats_3.packetsReceived, kPackets, 2);
+}
+
 }  // namespace voetest