New method TimestampAligner::TranslateTimestamp

webrtc/api/androidvideotracksource.cc

 /*
  *  Copyright (c) 2016 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 219 matching lines @@
                                          int* out_width,
                                          int* out_height,
                                          int* crop_width,
                                          int* crop_height,
                                          int* crop_x,
                                          int* crop_y,
                                          int64_t* translated_camera_time_us) {
   RTC_DCHECK(camera_thread_checker_.CalledOnValidThread());
 
   int64_t system_time_us = rtc::TimeMicros();
-
-  int64_t offset_us =
-      timestamp_aligner_.UpdateOffset(camera_time_us, system_time_us);
+  *translated_camera_time_us =
+      timestamp_aligner_.TranslateTimestamp(camera_time_us, system_time_us);
 
   if (!broadcaster_.frame_wanted()) {
     return false;
   }
 
   if (!video_adapter_.AdaptFrameResolution(
           width, height, camera_time_us * rtc::kNumNanosecsPerMicrosec,

[perkj_webrtc, 2016/09/12 09:33:46]

use translated_camera_time_us here? 

[nisse-webrtc, 2016/09/12 12:04:20]

No, camera_time:us is supposedly of better accuracy. And we also allow
translated_camera_time_us to be NULL (for the OnFrameCaptured path, which hasn't
been deleted yet).

           crop_width, crop_height, out_width, out_height)) {
     // VideoAdapter dropped the frame.
     return false;
   }
   *crop_x = (width - *crop_width) / 2;
   *crop_y = (height - *crop_height) / 2;
 
-  *translated_camera_time_us = timestamp_aligner_.ClipTimestamp(
-      camera_time_us + offset_us, system_time_us);
   return true;
 }
 
 }  // namespace webrtc