Do not call OnDecoderTiming before timing values are set.

webrtc/modules/video_coding/timing.h

 /*
  *  Copyright (c) 2011 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 74 matching lines @@
   virtual uint32_t MaxWaitingTime(int64_t render_time_ms, int64_t now_ms) const;
 
   // Returns the current target delay which is required delay + decode time +
   // render delay.
   int TargetVideoDelay() const;
 
   // Calculates whether or not there is enough time to decode a frame given a
   // certain amount of processing time.
   bool EnoughTimeToDecode(uint32_t available_processing_time_ms) const;
 
-  // Return current timing information.
-  void GetTimings(int* decode_ms,
+  // Return current timing information. Returns true if the first frame has been
+  // decoded, false otherwise.
+  bool GetTimings(int* decode_ms,
                   int* max_decode_ms,
                   int* current_delay_ms,
                   int* target_delay_ms,
                   int* jitter_buffer_ms,
                   int* min_playout_delay_ms,
                   int* render_delay_ms) const;
 
   enum { kDefaultRenderDelayMs = 10 };
   enum { kDelayMaxChangeMsPerS = 100 };
 
@@ skipping 26 matching lines @@
 
   // Statistics.
   size_t num_decoded_frames_ GUARDED_BY(crit_sect_);
   size_t num_delayed_decoded_frames_ GUARDED_BY(crit_sect_);
   int64_t first_decoded_frame_ms_ GUARDED_BY(crit_sect_);
   uint64_t sum_missed_render_deadline_ms_ GUARDED_BY(crit_sect_);
 };
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_TIMING_H_