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Add the missing binding to the native Java video capture on Android. The binding is done with some Java class AndroidCameraInterop based on the WebRTC project's UnityUtility.java. It enables interop between the Java camera object and the C++ video track source object. This both avoids having to build and merge UnityUtility.java, as well as allow extending it with new functionality like video capture format selection. Bug: microsoft#246
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78
...d/webrtc-native/src/main/java/com/microsoft/mixedreality/webrtc/AndroidCameraInterop.java
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| // Copyright (c) Microsoft Corporation. | ||
| // Licensed under the MIT License. | ||
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| // This file is originaly based on the UnityUtility.java file from the | ||
| // WebRTC.org project, modified for the needs of the MixedReality-WebRTC | ||
| // project and expanded with additional functionalities. | ||
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| // UnityUtility.java: | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package com.microsoft.mixedreality.webrtc; | ||
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| import android.content.Context; | ||
| import java.util.List; | ||
| import javax.annotation.Nullable; | ||
| import org.webrtc.CameraEnumerator; | ||
| import org.webrtc.Camera2Enumerator; | ||
| import org.webrtc.ContextUtils; | ||
| import org.webrtc.SurfaceTextureHelper; | ||
| import org.webrtc.VideoCapturer; | ||
| import org.webrtc.VideoSource; | ||
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| public class AndroidCameraInterop { | ||
| private static final String VIDEO_CAPTURER_THREAD_NAME = "VideoCapturerThread"; | ||
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| public static SurfaceTextureHelper CreateSurfaceTextureHelper() { | ||
| final SurfaceTextureHelper surfaceTextureHelper = | ||
| SurfaceTextureHelper.create(VIDEO_CAPTURER_THREAD_NAME, null); | ||
| return surfaceTextureHelper; | ||
| } | ||
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| private static boolean useCamera2() { | ||
| return Camera2Enumerator.isSupported(ContextUtils.getApplicationContext()); | ||
| } | ||
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| private static @Nullable VideoCapturer createCameraCapturer(CameraEnumerator enumerator) { | ||
| final String[] deviceNames = enumerator.getDeviceNames(); | ||
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| for (String deviceName : deviceNames) { | ||
| if (enumerator.isFrontFacing(deviceName)) { | ||
| VideoCapturer videoCapturer = enumerator.createCapturer(deviceName, null); | ||
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| if (videoCapturer != null) { | ||
| return videoCapturer; | ||
| } | ||
| } | ||
| } | ||
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| return null; | ||
| } | ||
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| public static VideoCapturer StartCapture( | ||
| long nativeTrackSource, SurfaceTextureHelper surfaceTextureHelper) { | ||
| VideoCapturer capturer = | ||
| createCameraCapturer(new Camera2Enumerator(ContextUtils.getApplicationContext())); | ||
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| VideoSource videoSource = new VideoSource(nativeTrackSource); | ||
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| capturer.initialize(surfaceTextureHelper, ContextUtils.getApplicationContext(), | ||
| videoSource.getCapturerObserver()); | ||
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| capturer.startCapture(720, 480, 30); | ||
| return capturer; | ||
| } | ||
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| public static void StopCamera(VideoCapturer camera) throws InterruptedException { | ||
| camera.stopCapture(); | ||
| camera.dispose(); | ||
| } | ||
| } |