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

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

 /*
  *  Copyright (c) 2017 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.
  */
 
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_TEST_CONVERSATIONAL_SPEECH_MULTIEND_CALL_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_TEST_CONVERSATIONAL_SPEECH_MULTIEND_CALL_H_
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
+#include <utility>
+#include <vector>
 
 #include "webrtc/base/array_view.h"
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/modules/audio_processing/test/conversational_speech/timing.h"
 #include "webrtc/modules/audio_processing/test/conversational_speech/wavreader_abstract_factory.h"
 #include "webrtc/modules/audio_processing/test/conversational_speech/wavreader_interface.h"
 
 namespace webrtc {
 namespace test {
 namespace conversational_speech {
 
 class MultiEndCall {
  public:
   MultiEndCall(
       rtc::ArrayView<const Turn> timing, const std::string& audiotracks_path,
       std::unique_ptr<WavReaderAbstractFactory> wavreader_abstract_factory);
   ~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_;
   std::unique_ptr<WavReaderAbstractFactory> wavreader_abstract_factory_;
   std::set<std::string> speaker_names_;
   std::map<std::string, std::unique_ptr<WavReaderInterface>>
       audiotrack_readers_;
+  bool valid_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(MultiEndCall);
 };
 
 }  // namespace conversational_speech
 }  // namespace test
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_TEST_CONVERSATIONAL_SPEECH_MULTIEND_CALL_H_