NetEq: Implement logging of Delayed Packet Outage Events

webrtc/modules/audio_coding/neteq/tools/input_audio_file.h

 /*
  *  Copyright (c) 2013 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.
  */
 
@@ skipping 16 matching lines @@
   explicit InputAudioFile(const std::string file_name);
 
   virtual ~InputAudioFile();
 
   // Reads |samples| elements from source file to |destination|. Returns true
   // if the read was successful, otherwise false. If the file end is reached,
   // the file is rewound and reading continues from the beginning.
   // The output |destination| must have the capacity to hold |samples| elements.
   virtual bool Read(size_t samples, int16_t* destination);
 
+  // Fast-forwards (|samples| > 0) or -backwards (|samples| < 0) the file by the
+  // indicated number of samples. Just like Read(), Seek() starts over at the
+  // beginning of the file if the end is reached. However, seeking backwards
+  // past the beginning of the file is not possible.
+  virtual bool Seek(int samples);
+
   // Creates a multi-channel signal from a mono signal. Each sample is repeated
   // |channels| times to create an interleaved multi-channel signal where all
   // channels are identical. The output |destination| must have the capacity to
   // hold samples * channels elements. Note that |source| and |destination| can
   // be the same array (i.e., point to the same address).
   static void DuplicateInterleaved(const int16_t* source, size_t samples,
                                    size_t channels, int16_t* destination);
 
  private:
   FILE* fp_;
   DISALLOW_COPY_AND_ASSIGN(InputAudioFile);
 };
 
 }  // namespace test
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_TOOLS_INPUT_AUDIO_FILE_H_