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package com.javispedro.vndroid;
import android.content.Context;
import android.graphics.PixelFormat;
import android.hardware.display.DisplayManager;
import android.media.ImageReader;
import android.media.projection.MediaProjection;
import android.os.Handler;
import android.support.annotation.NonNull;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Display;
public class ScreenMirrorGrabber extends ScreenGrabber {
private static final String TAG = ScreenMirrorGrabber.class.getSimpleName();
protected final MediaProjection projection;
protected final Display realDisplay;
protected final DisplayMetrics realDisplayMetrics;
private float scale = 0.5f;
public ScreenMirrorGrabber(Context context, @NonNull MediaProjection proj, @NonNull Display display) {
super(context);
projection = proj;
realDisplay = display;
realDisplayMetrics = new DisplayMetrics();
}
private void initDisplay() {
realDisplay.getRealMetrics(realDisplayMetrics);
Log.d(TAG, "real display size: " + realDisplayMetrics.widthPixels + "x" + realDisplayMetrics.heightPixels);
int width = Math.round(realDisplayMetrics.widthPixels * scale);
int height = Math.round(realDisplayMetrics.heightPixels * scale);
int dpi = realDisplayMetrics.densityDpi;
Log.d(TAG, "starting mirror display with size: " + width + "x" + height + " dpi: " + dpi);
reader = ImageReader.newInstance(width, height, PixelFormat.RGBA_8888, MAX_IMAGES);
reader.setOnImageAvailableListener(new ImageReaderCallback(), null);
display = projection.createVirtualDisplay("vndroid",
width, height, dpi,
DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC | DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
reader.getSurface(),
new VirtualDisplayCallback(), null);
}
@Override
public void start() {
if (reader != null || display != null) {
Log.w(TAG, "already started");
return;
}
initDisplay();
}
@Override
public void stop() {
super.stop();
projection.stop();
}
@Override
public int scaleInputX(int x) {
return Math.round(x / scale);
}
@Override
public int scaleInputY(int y) {
return Math.round(y / scale);
}
@Override
public boolean hasSizeChanged() {
DisplayMetrics metrics = new DisplayMetrics();
realDisplay.getRealMetrics(metrics);
return metrics.widthPixels != realDisplayMetrics.widthPixels || metrics.heightPixels != realDisplayMetrics.heightPixels;
}
@Override
public void updateScreenSize() {
final ImageReader oldReader = reader;
reader = null;
if (display != null) {
display.release();
display = null;
}
initDisplay();
Log.d(TAG, "new buffers set");
// Delay destruction of old image buffers to minimize multithread issues...
if (oldReader != null) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Log.d(TAG, "old buffers closed");
oldReader.close();
}
}, 1000);
}
}
}
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