org.opencv.android.FpsMeter Maven / Gradle / Ivy
package org.opencv.android;
import java.text.DecimalFormat;
import org.opencv.core.Core;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.Log;
public class FpsMeter {
private static final String TAG = "FpsMeter";
private static final int STEP = 20;
private static final DecimalFormat FPS_FORMAT = new DecimalFormat("0.00");
private int mFramesCounter;
private double mFrequency;
private long mprevFrameTime;
private String mStrfps;
Paint mPaint;
boolean mIsInitialized = false;
int mWidth = 0;
int mHeight = 0;
public void init() {
mFramesCounter = 0;
mFrequency = Core.getTickFrequency();
mprevFrameTime = Core.getTickCount();
mStrfps = "";
mPaint = new Paint();
mPaint.setColor(Color.BLUE);
mPaint.setTextSize(20);
}
public void measure() {
if (!mIsInitialized) {
init();
mIsInitialized = true;
} else {
mFramesCounter++;
if (mFramesCounter % STEP == 0) {
long time = Core.getTickCount();
double fps = STEP * mFrequency / (time - mprevFrameTime);
mprevFrameTime = time;
if (mWidth != 0 && mHeight != 0)
mStrfps = FPS_FORMAT.format(fps) + " FPS@" + Integer.valueOf(mWidth) + "x" + Integer.valueOf(mHeight);
else
mStrfps = FPS_FORMAT.format(fps) + " FPS";
Log.i(TAG, mStrfps);
}
}
}
public void setResolution(int width, int height) {
mWidth = width;
mHeight = height;
}
public void draw(Canvas canvas, float offsetx, float offsety) {
Log.d(TAG, mStrfps);
canvas.drawText(mStrfps, offsetx, offsety, mPaint);
}
}
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