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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
package com.android.dialer.simulator.impl;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Handler;
import android.os.HandlerThread;
import android.support.annotation.NonNull;
import android.support.annotation.VisibleForTesting;
import android.support.annotation.WorkerThread;
import android.view.Surface;
import com.android.dialer.common.Assert;
import com.android.dialer.common.LogUtil;
/**
* Used by the video provider to draw the remote party's video. The in-call UI is responsible for
* setting the view to draw to. Since the simulator doesn't have a remote party we simply draw a
* green screen with a ball bouncing around.
*/
final class SimulatorRemoteVideo {
@NonNull private final RenderThread thread;
private boolean isStopped;
SimulatorRemoteVideo(@NonNull Surface surface) {
thread = new RenderThread(new Renderer(surface));
}
void startVideo() {
LogUtil.enterBlock("SimulatorRemoteVideo.startVideo");
Assert.checkState(!isStopped);
thread.start();
}
void stopVideo() {
LogUtil.enterBlock("SimulatorRemoteVideo.stopVideo");
isStopped = true;
thread.quitSafely();
}
@VisibleForTesting
Runnable getRenderer() {
return thread.getRenderer();
}
private static class Renderer implements Runnable {
private static final int FRAME_DELAY_MILLIS = 33;
private static final float CIRCLE_STEP = 16.0f;
@NonNull private final Surface surface;
private float circleX;
private float circleY;
private float radius;
private double angle;
Renderer(@NonNull Surface surface) {
this.surface = Assert.isNotNull(surface);
}
@Override
public void run() {
drawFrame();
schedule();
}
@WorkerThread
void schedule() {
Assert.isWorkerThread();
new Handler().postDelayed(this, FRAME_DELAY_MILLIS);
}
@WorkerThread
private void drawFrame() {
Assert.isWorkerThread();
Canvas canvas;
try {
canvas = surface.lockCanvas(null /* dirtyRect */);
} catch (IllegalArgumentException e) {
// This can happen when the video fragment tears down.
LogUtil.e("SimulatorRemoteVideo.RenderThread.drawFrame", "unable to lock canvas", e);
return;
}
LogUtil.i(
"SimulatorRemoteVideo.RenderThread.drawFrame",
"size; %d x %d",
canvas.getWidth(),
canvas.getHeight());
canvas.drawColor(Color.GREEN);
moveCircle(canvas);
drawCircle(canvas);
surface.unlockCanvasAndPost(canvas);
}
@WorkerThread
private void moveCircle(Canvas canvas) {
Assert.isWorkerThread();
int width = canvas.getWidth();
int height = canvas.getHeight();
if (circleX == 0 && circleY == 0) {
circleX = width / 2.0f;
circleY = height / 2.0f;
angle = Math.PI / 4.0;
radius = Math.min(canvas.getWidth(), canvas.getHeight()) * 0.15f;
} else {
circleX += (float) Math.cos(angle) * CIRCLE_STEP;
circleY += (float) Math.sin(angle) * CIRCLE_STEP;
// Bounce the circle off the edge.
if (circleX + radius >= width
|| circleX - radius <= 0
|| circleY + radius >= height
|| circleY - radius <= 0) {
angle += Math.PI / 2.0;
}
}
}
@WorkerThread
private void drawCircle(Canvas canvas) {
Assert.isWorkerThread();
Paint paint = new Paint();
paint.setColor(Color.MAGENTA);
paint.setStyle(Paint.Style.FILL);
canvas.drawCircle(circleX, circleY, radius, paint);
}
}
private static class RenderThread extends HandlerThread {
@NonNull private final Renderer renderer;
RenderThread(@NonNull Renderer renderer) {
super("SimulatorRemoteVideo");
this.renderer = Assert.isNotNull(renderer);
}
@Override
@WorkerThread
protected void onLooperPrepared() {
Assert.isWorkerThread();
renderer.schedule();
}
@VisibleForTesting
Runnable getRenderer() {
return renderer;
}
}
}
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