Reland: ScreenCapture for Android phase1, part I

media/capture/content/android/screen_capture_machine_android.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_CAPTURE_CONTENT_ANDROID_SCREEN_CAPTURE_MACHINE_ANDROID_H_
+#define MEDIA_CAPTURE_CONTENT_ANDROID_SCREEN_CAPTURE_MACHINE_ANDROID_H_
+
+#include <jni.h>
+#include <memory>
+
+#include "base/android/scoped_java_ref.h"
+#include "media/capture/content/screen_capture_device_core.h"
+
+namespace media {
+
+// ScreenCaptureMachineAndroid captures 32bit RGB or YUV420 triplanar.
+class MEDIA_EXPORT ScreenCaptureMachineAndroid
+    : public media::VideoCaptureMachine {
+ public:
+  ScreenCaptureMachineAndroid();
+  ~ScreenCaptureMachineAndroid() override;
+
+  static bool RegisterScreenCaptureMachine(JNIEnv* env);
+  static base::android::ScopedJavaLocalRef<jobject>
+  createScreenCaptureMachineAndroid(jlong nativeScreenCaptureMachineAndroid);
+
+  // Implement org.chromium.media.ScreenCapture.nativeOnRGBAFrameAvailable.
+  void OnRGBAFrameAvailable(JNIEnv* env,
+                            jobject obj,
+                            jobject buf,
+                            jint row_stride,
+                            jint left,
+                            jint top,
+                            jint width,
+                            jint height,
+                            jlong timestamp);
+  // Implement org.chromium.media.ScreenCapture.nativeOnI420FrameAvailable.
+  void OnI420FrameAvailable(JNIEnv* env,
+                            jobject obj,
+                            jobject y_buffer,
+                            jint y_Zde,
+                            jobject u_buffer,
+                            jobject v_buffer,
+                            jint uv_row_stride,
+                            jint uv_pixel_stride,
+                            jint left,
+                            jint top,
+                            jint width,
+                            jint height,
+                            jlong timestamp);
+
+  // Implement org.chromium.media.ScreenCapture.nativeOnActivityResult.
+  void OnActivityResult(JNIEnv* env, jobject obj, jboolean result);
+
+  // VideoCaptureMachine overrides.
+  void Start(const scoped_refptr<media::ThreadSafeCaptureOracle>& oracle_proxy,
+             const media::VideoCaptureParams& params,
+             const base::Callback<void(bool)> callback) override;
+  void Stop(const base::Closure& callback) override;
+  void MaybeCaptureForRefresh() override;
+
+ private:
+  // Makes all the decisions about which frames to copy, and how.
+  scoped_refptr<media::ThreadSafeCaptureOracle> oracle_proxy_;
+
+  // Cache the last frame for possible refreshing.
+  scoped_refptr<VideoFrame> lastFrame_;
+
+  // Java VideoCaptureAndroid instance.
+  base::android::ScopedJavaLocalRef<jobject> j_capture_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenCaptureMachineAndroid);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_CAPTURE_CONTENT_ANDROID_SCREEN_CAPTURE_MACHINE_ANDROID_H_