Add minimum waiting time to NetEQ metrics

Adding minWaitingTimeMs to ACMNetworkStatistics and to
NetworkStatistics. Also adding unittest.

TEST=audio_coding_unittests

Review URL: http://webrtc-codereview.appspot.com/350006

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1408 4adac7df-926f-26a2-2b94-8c16560cd09d

src/common_types.h

@@ -271,6 +271,8 @@ struct NetworkStatistics           // NETEQ statistics
     int meanWaitingTimeMs;
     // median packet waiting time in the jitter buffer (ms)
     int medianWaitingTimeMs;
+    // min packet waiting time in the jitter buffer (ms)
+    int minWaitingTimeMs;
     // max packet waiting time in the jitter buffer (ms)
     int maxWaitingTimeMs;
 };

src/modules/audio_coding/main/interface/audio_coding_module_typedefs.h

@@ -160,6 +160,7 @@ enum ACMAMRPackingFormat {
 //                           rate is higher than sender sample rate.
 // -meanWaitingTimeMs      : average packet waiting time in the buffer
 // -medianWaitingTimeMs    : median packet waiting time in the buffer
+// -minWaitingTimeMs       : min packet waiting time in the buffer
 // -maxWaitingTimeMs       : max packet waiting time in the buffer
 typedef struct {
   WebRtc_UWord16 currentBufferSize;
@@ -173,6 +174,7 @@ typedef struct {
   int32_t clockDriftPPM;
   int meanWaitingTimeMs;
   int medianWaitingTimeMs;
+  int minWaitingTimeMs;
   int maxWaitingTimeMs;
 } ACMNetworkStatistics;
 

src/modules/audio_coding/main/source/acm_neteq.cc

@@ -486,6 +486,7 @@ ACMNetEQ::NetworkStatistics(
         {
             statistics->meanWaitingTimeMs = -1;
             statistics->medianWaitingTimeMs = -1;
+            statistics->minWaitingTimeMs = -1;
             statistics->maxWaitingTimeMs = -1;
         }
         else
@@ -500,6 +501,7 @@ ACMNetEQ::NetworkStatistics(
             {
                 statistics->medianWaitingTimeMs = waiting_times_vec[size / 2];
             }
+            statistics->minWaitingTimeMs = waiting_times_vec.front();
             statistics->maxWaitingTimeMs = waiting_times_vec.back();
             double sum = 0;
             for (size_t i = 0; i < size; ++i) {

src/modules/audio_coding/main/source/acm_neteq_unittest.cc

@@ -113,6 +113,7 @@ TEST_F(AcmNetEqTest, NetworkStatistics) {
   EXPECT_EQ(0, stats.currentAccelerateRate);
   EXPECT_EQ(-916, stats.clockDriftPPM);  // Initial value is slightly off.
   EXPECT_EQ(300, stats.maxWaitingTimeMs);
+  EXPECT_EQ(10, stats.minWaitingTimeMs);
   EXPECT_EQ(159, stats.meanWaitingTimeMs);
   EXPECT_EQ(160, stats.medianWaitingTimeMs);
 }
@@ -137,6 +138,7 @@ TEST_F(AcmNetEqTest, TestZeroLengthWaitingTimesVector) {
   EXPECT_EQ(0, stats.currentPreemptiveRate);
   EXPECT_EQ(0, stats.currentAccelerateRate);
   EXPECT_EQ(-916, stats.clockDriftPPM);  // Initial value is slightly off.
+  EXPECT_EQ(-1, stats.minWaitingTimeMs);
   EXPECT_EQ(-1, stats.maxWaitingTimeMs);
   EXPECT_EQ(-1, stats.meanWaitingTimeMs);
   EXPECT_EQ(-1, stats.medianWaitingTimeMs);

src/modules/audio_coding/main/test/APITest.cc

@@ -987,6 +987,7 @@ APITest::TestDelay(char side)
         fprintf(stdout, "Clock-drift............. %d\n", networkStat.clockDriftPPM);
         fprintf(stdout, "Mean waiting time....... %d\n", networkStat.meanWaitingTimeMs);
         fprintf(stdout, "Median waiting time..... %d\n", networkStat.medianWaitingTimeMs);
+        fprintf(stdout, "Min waiting time........ %d\n", networkStat.minWaitingTimeMs);
         fprintf(stdout, "Max waiting time........ %d\n", networkStat.maxWaitingTimeMs);
     }
 

src/voice_engine/main/test/auto_test/voe_standard_test.cc

@@ -2593,6 +2593,8 @@ TEST_MUSTPASS(voe_codec_->SetSendCodec(0, ci));
            nStats.meanWaitingTimeMs);
   TEST_LOG("    medianWaitingTimeMs       = %i \n",
            nStats.medianWaitingTimeMs);
+  TEST_LOG("    minWaitingTimeMs          = %i \n",
+           nStats.minWaitingTimeMs);
   TEST_LOG("    maxWaitingTimeMs          = %i \n",
            nStats.maxWaitingTimeMs);
 #else