Android Open Source - cameraMediaCodec Fps Helper

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License

The source code is released under:

Copyright (c) 2014, Zhang Ziyue All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * ...

If you think the Android project cameraMediaCodec listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

package com.android.testtool;
// w w  w . j  av  a 2 s .c  om

//this tool can only filter average distributed frames. If some frames are tight and some are loose, it cannot handle the case.
public class FpsHelper {
  
  boolean mEnableDrop = false;
  int mTargetFps = 0;
  long mResetTimestamp = 0;
  long mPassedFrames = 0;
  
  public void SetEnableDrop(boolean enable)
  {
    mEnableDrop = enable;
  }
  
  public void SetFrameRateControlTarget(int fps)
  {
    mTargetFps = fps;
    mResetTimestamp = 0;
    mPassedFrames = 0;
  }
  
  public boolean ShouldBeDropped(long timestamp)
  {
    if (mEnableDrop == false)
    {
      return false;
    }
    
    if (mResetTimestamp == 0 || 
      (mResetTimestamp!= 0 && timestamp < mResetTimestamp)
      )
    {
      mPassedFrames = 0;
      mResetTimestamp = timestamp;
      return false;
    }
    
    long delta = timestamp - mResetTimestamp;
    long framesShouldPass = delta * mTargetFps / 1000;
    
    if (framesShouldPass > mPassedFrames)
    {
      mPassedFrames ++;
      return false;
    }
    else
    {
      return true;
    }
  }
  
  
}

Java Source Code List