NetEq: Implement logging of Delayed Packet Outage Events

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

Index: webrtc/modules/audio_coding/neteq/tools/input_audio_file.h
diff --git a/webrtc/modules/audio_coding/neteq/tools/input_audio_file.h b/webrtc/modules/audio_coding/neteq/tools/input_audio_file.h
index 075b5d33b506609727c8d944fb1b21e4c6c88ece..fae55733f49a81daf35a70f4efc2daccbb95ce4e 100644
--- a/webrtc/modules/audio_coding/neteq/tools/input_audio_file.h
+++ b/webrtc/modules/audio_coding/neteq/tools/input_audio_file.h
@@ -34,6 +34,12 @@ class InputAudioFile {
   // 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