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/*
* Copyright 2017 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.
*/
package org.webrtc;
import android.view.SurfaceHolder;
import java.util.concurrent.CountDownLatch;
/**
* Display the video stream on a Surface.
* renderFrame() is asynchronous to avoid blocking the calling thread.
* This class is thread safe and handles access from potentially three different threads:
* Interaction from the main app in init, release and setMirror.
* Interaction from C++ rtc::VideoSinkInterface in renderFrame.
* Interaction from SurfaceHolder lifecycle in surfaceCreated, surfaceChanged, and surfaceDestroyed.
*/
public class SurfaceEglRenderer extends EglRenderer implements SurfaceHolder.Callback {
private static final String TAG = "SurfaceEglRenderer";
// Callback for reporting renderer events. Read-only after initialization so no lock required.
private RendererCommon.RendererEvents rendererEvents;
private final Object layoutLock = new Object();
private boolean isRenderingPaused;
private boolean isFirstFrameRendered;
private int rotatedFrameWidth;
private int rotatedFrameHeight;
private int frameRotation;
/**
* In order to render something, you must first call init().
*/
public SurfaceEglRenderer(String name) {
super(name);
}
/**
* Initialize this class, sharing resources with `sharedContext`. The custom `drawer` will be used
* for drawing frames on the EGLSurface. This class is responsible for calling release() on
* `drawer`. It is allowed to call init() to reinitialize the renderer after a previous
* init()/release() cycle.
*/
public void init(final EglBase.Context sharedContext,
RendererCommon.RendererEvents rendererEvents, final int[] configAttributes,
RendererCommon.GlDrawer drawer) {
ThreadUtils.checkIsOnMainThread();
this.rendererEvents = rendererEvents;
synchronized (layoutLock) {
isFirstFrameRendered = false;
rotatedFrameWidth = 0;
rotatedFrameHeight = 0;
frameRotation = 0;
}
super.init(sharedContext, configAttributes, drawer);
}
@Override
public void init(final EglBase.Context sharedContext, final int[] configAttributes,
RendererCommon.GlDrawer drawer) {
init(sharedContext, null /* rendererEvents */, configAttributes, drawer);
}
/**
* Limit render framerate.
*
* @param fps Limit render framerate to this value, or use Float.POSITIVE_INFINITY to disable fps
* reduction.
*/
@Override
public void setFpsReduction(float fps) {
synchronized (layoutLock) {
isRenderingPaused = fps == 0f;
}
super.setFpsReduction(fps);
}
@Override
public void disableFpsReduction() {
synchronized (layoutLock) {
isRenderingPaused = false;
}
super.disableFpsReduction();
}
@Override
public void pauseVideo() {
synchronized (layoutLock) {
isRenderingPaused = true;
}
super.pauseVideo();
}
// VideoSink interface.
@Override
public void onFrame(VideoFrame frame) {
updateFrameDimensionsAndReportEvents(frame);
super.onFrame(frame);
}
// SurfaceHolder.Callback interface.
@Override
public void surfaceCreated(final SurfaceHolder holder) {
ThreadUtils.checkIsOnMainThread();
createEglSurface(holder.getSurface());
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
ThreadUtils.checkIsOnMainThread();
final CountDownLatch completionLatch = new CountDownLatch(1);
releaseEglSurface(completionLatch::countDown);
ThreadUtils.awaitUninterruptibly(completionLatch);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
ThreadUtils.checkIsOnMainThread();
logD("surfaceChanged: format: " + format + " size: " + width + "x" + height);
}
// Update frame dimensions and report any changes to `rendererEvents`.
private void updateFrameDimensionsAndReportEvents(VideoFrame frame) {
synchronized (layoutLock) {
if (isRenderingPaused) {
return;
}
if (!isFirstFrameRendered) {
isFirstFrameRendered = true;
logD("Reporting first rendered frame.");
if (rendererEvents != null) {
rendererEvents.onFirstFrameRendered();
}
}
if (rotatedFrameWidth != frame.getRotatedWidth()
|| rotatedFrameHeight != frame.getRotatedHeight()
|| frameRotation != frame.getRotation()) {
logD("Reporting frame resolution changed to " + frame.getBuffer().getWidth() + "x"
+ frame.getBuffer().getHeight() + " with rotation " + frame.getRotation());
if (rendererEvents != null) {
rendererEvents.onFrameResolutionChanged(
frame.getBuffer().getWidth(), frame.getBuffer().getHeight(), frame.getRotation());
}
rotatedFrameWidth = frame.getRotatedWidth();
rotatedFrameHeight = frame.getRotatedHeight();
frameRotation = frame.getRotation();
}
}
}
private void logD(String string) {
Logging.d(TAG, name + ": " + string);
}
}
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