Android: Generate JNI code for VideoDecoder

Bug: webrtc:8278
Change-Id: I985fa63b0c5a9cdd0fb1817730646bcd4b30288a
Reviewed-on: https://webrtc-review.googlesource.com/24221
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20803}

sdk/android/src/java/org/webrtc/VideoDecoderWrapper.java

@@ -0,0 +1,34 @@
+/*
+ *  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 org.webrtc.VideoDecoder;
+
+/**
+ * This class contains the Java glue code for JNI generation of VideoDecoder.
+ */
+class VideoDecoderWrapper {
+  // TODO(bugs.webrtc.org/8551) Remove.
+  @CalledByNative
+  static VideoDecoder.Settings createSettings(int numberOfCores, int width, int height) {
+    return new VideoDecoder.Settings(numberOfCores, width, height);
+  }
+
+  @CalledByNative
+  static VideoDecoder.Callback createDecoderCallback(final long nativeDecoder) {
+    return (VideoFrame frame, Integer decodeTimeMs,
+               Integer qp) -> nativeOnDecodedFrame(nativeDecoder, frame, decodeTimeMs, qp);
+  }
+
+  @NativeClassQualifiedName("webrtc::jni::VideoDecoderWrapper")
+  private static native void nativeOnDecodedFrame(
+      long nativeDecoder, VideoFrame frame, Integer decodeTimeMs, Integer qp);
+}