Conversational Speech tool, MultiEndCall::CheckTiming() and tests

webrtc/modules/audio_processing/test/conversational_speech/multiend_call.h

Index: webrtc/modules/audio_processing/test/conversational_speech/multiend_call.h
diff --git a/webrtc/modules/audio_processing/test/conversational_speech/multiend_call.h b/webrtc/modules/audio_processing/test/conversational_speech/multiend_call.h
index 234cb2799e34a45db318dcb5e7bd2cd9a580bc8f..2af742453173f6e1785a7412debd87bf3c279827 100644
--- a/webrtc/modules/audio_processing/test/conversational_speech/multiend_call.h
+++ b/webrtc/modules/audio_processing/test/conversational_speech/multiend_call.h
@@ -15,6 +15,8 @@
 #include <memory>
 #include <set>
 #include <string>
+#include <utility>
+#include <vector>
 
 #include "webrtc/base/array_view.h"
 #include "webrtc/base/constructormagic.h"
@@ -36,16 +38,26 @@ class MultiEndCall {
   const std::set<std::string>& speaker_names() const;
   const std::map<std::string, std::unique_ptr<WavReaderInterface>>&
       audiotrack_readers() const;
+  bool valid();
 
  private:
-  // Find unique speaker names.
+  typedef std::pair<std::size_t, std::size_t> Interval;
+  typedef std::vector<Interval> IntervalsVector;
+
+  // Finds unique speaker names.
   void FindSpeakerNames();
 
-  // Create one WavReader instance for each unique audiotrack.
+  // Creates one WavReader instance for each unique audiotrack.
   void CreateAudioTrackReaders();
 
-  // Check the speaking turns timing.
-  void CheckTiming();
+  // Validates the speaking turns timing information. Accepts cross-talk, but
+  // only up to 2 speakers. Rejects unordered turns and self cross-talk.
+  bool CheckTiming() const;
+
+  // Detects cross-talk, which occurs when two turns from the same speaker
+  // overlap in time.
+  bool DetectSelfCrossTalk(IntervalsVector* speaker_intervals)
+      const;
 
   rtc::ArrayView<const Turn> timing_;
   const std::string& audiotracks_path_;
@@ -53,6 +65,7 @@ class MultiEndCall {
   std::set<std::string> speaker_names_;
   std::map<std::string, std::unique_ptr<WavReaderInterface>>
       audiotrack_readers_;
+  bool valid_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(MultiEndCall);
 };