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/*
* Copyright (c) 2012 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.videoengine;
import java.io.IOException;
import java.util.List;
import android.content.Context;
import android.util.Log;
import android.view.Surface;
import android.view.WindowManager;
import java.util.concurrent.CountDownLatch;
import org.mozilla.gecko.annotation.WebRTCJNITarget;
import org.webrtc.CameraEnumerator;
import org.webrtc.Camera1Enumerator;
import org.webrtc.Camera2Enumerator;
import org.webrtc.CameraVideoCapturer;
import org.webrtc.CapturerObserver;
import org.webrtc.EglBase;
import org.webrtc.SurfaceTextureHelper;
import org.webrtc.VideoFrame;
import org.webrtc.VideoFrame.I420Buffer;
public class VideoCaptureAndroid implements CameraVideoCapturer.CameraEventsHandler, CapturerObserver {
private final static String TAG = "WEBRTC-JC";
private final String deviceName;
private volatile long native_capturer; // |VideoCaptureAndroid*| in C++.
private Context context;
private CameraVideoCapturer cameraVideoCapturer;
private EglBase eglBase;
private SurfaceTextureHelper surfaceTextureHelper;
// This class is recreated everytime we start/stop capture, so we
// can safely create the CountDownLatches here.
private final CountDownLatch capturerStarted = new CountDownLatch(1);
private boolean capturerStartedSucceeded = false;
private final CountDownLatch capturerStopped = new CountDownLatch(1);
@WebRTCJNITarget
public VideoCaptureAndroid(String deviceName) {
// Remove the camera facing information from the name.
String[] parts = deviceName.split("Facing (front|back):");
if (parts.length == 2) {
this.deviceName = parts[1].replace(" (infrared)", "");
} else {
Log.e(TAG, "VideoCaptureAndroid: Expected facing mode as part of name: " + deviceName);
this.deviceName = deviceName;
}
this.context = GetContext();
CameraEnumerator enumerator;
if (Camera2Enumerator.isSupported(context)) {
enumerator = new Camera2Enumerator(context);
} else {
enumerator = new Camera1Enumerator();
}
try {
cameraVideoCapturer = enumerator.createCapturer(this.deviceName, this);
eglBase = EglBase.create();
surfaceTextureHelper = SurfaceTextureHelper.create("VideoCaptureAndroidSurfaceTextureHelper", eglBase.getEglBaseContext());
cameraVideoCapturer.initialize(surfaceTextureHelper, context, this);
} catch (java.lang.IllegalArgumentException e) {
Log.e(TAG, "VideoCaptureAndroid: Exception while creating capturer: " + e);
}
}
// Return the global application context.
@WebRTCJNITarget
private static native Context GetContext();
// Called by native code. Returns true if capturer is started.
//
// Note that this actually opens the camera, and Camera callbacks run on the
// thread that calls open(), so this is done on the CameraThread. Since ViE
// API needs a synchronous success return value we wait for the result.
@WebRTCJNITarget
private synchronized boolean startCapture(
final int width, final int height,
final int min_mfps, final int max_mfps,
long native_capturer) {
Log.d(TAG, "startCapture: " + width + "x" + height + "@" +
min_mfps + ":" + max_mfps);
if (cameraVideoCapturer == null) {
return false;
}
cameraVideoCapturer.startCapture(width, height, max_mfps);
try {
capturerStarted.await();
} catch (InterruptedException e) {
return false;
}
if (capturerStartedSucceeded) {
this.native_capturer = native_capturer;
}
return capturerStartedSucceeded;
}
// Called by native code. Returns true when camera is known to be stopped.
@WebRTCJNITarget
private synchronized boolean stopCapture() {
Log.d(TAG, "stopCapture");
if (cameraVideoCapturer == null) {
return false;
}
native_capturer = 0;
try {
cameraVideoCapturer.stopCapture();
capturerStopped.await();
} catch (InterruptedException e) {
return false;
}
Log.d(TAG, "stopCapture done");
return true;
}
@WebRTCJNITarget
private int getDeviceOrientation() {
int orientation = 0;
if (context != null) {
WindowManager wm = (WindowManager) context.getSystemService(
Context.WINDOW_SERVICE);
switch(wm.getDefaultDisplay().getRotation()) {
case Surface.ROTATION_90:
orientation = 90;
break;
case Surface.ROTATION_180:
orientation = 180;
break;
case Surface.ROTATION_270:
orientation = 270;
break;
case Surface.ROTATION_0:
default:
orientation = 0;
break;
}
}
return orientation;
}
@WebRTCJNITarget
private native void ProvideCameraFrame(
int width, int height,
java.nio.ByteBuffer dataY, int strideY,
java.nio.ByteBuffer dataU, int strideU,
java.nio.ByteBuffer dataV, int strideV,
int rotation, long timeStamp, long captureObject);
//
// CameraVideoCapturer.CameraEventsHandler interface
//
// Camera error handler - invoked when camera can not be opened
// or any camera exception happens on camera thread.
public void onCameraError(String errorDescription) {}
// Called when camera is disconnected.
public void onCameraDisconnected() {}
// Invoked when camera stops receiving frames.
public void onCameraFreezed(String errorDescription) {}
// Callback invoked when camera is opening.
public void onCameraOpening(String cameraName) {}
// Callback invoked when first camera frame is available after camera is started.
public void onFirstFrameAvailable() {}
// Callback invoked when camera is closed.
public void onCameraClosed() {}
//
// CapturerObserver interface
//
// Notify if the capturer have been started successfully or not.
public void onCapturerStarted(boolean success) {
capturerStartedSucceeded = success;
capturerStarted.countDown();
}
// Notify that the capturer has been stopped.
public void onCapturerStopped() {
capturerStopped.countDown();
}
// Delivers a captured frame.
public void onFrameCaptured(VideoFrame frame) {
if (native_capturer != 0) {
I420Buffer i420Buffer = frame.getBuffer().toI420();
ProvideCameraFrame(i420Buffer.getWidth(), i420Buffer.getHeight(),
i420Buffer.getDataY(), i420Buffer.getStrideY(),
i420Buffer.getDataU(), i420Buffer.getStrideU(),
i420Buffer.getDataV(), i420Buffer.getStrideV(),
frame.getRotation(),
frame.getTimestampNs() / 1000000, native_capturer);
i420Buffer.release();
}
}
}
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