[WebRTC] updated to upstream branch 49 and related.

this patch is based on 38d7a7883...226f2f0bd

dom/media/systemservices/VideoEngine.h

@@ -0,0 +1,104 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 ts=8 et ft=cpp : */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_VideoEngine_h
+#define mozilla_VideoEngine_h
+
+#include "MediaEngine.h"
+#include "VideoFrameUtils.h"
+#include "mozilla/media/MediaUtils.h"
+#include "webrtc/common.h"
+#include "webrtc/modules/video_capture/video_capture_impl.h"
+#include "webrtc/modules/video_render/video_render.h"
+#include "webrtc/modules/video_capture/video_capture_defines.h"
+#include "webrtc/modules/video_capture/video_capture_factory.h"
+#include "webrtc/video_engine/desktop_capture_impl.h"
+#include <memory>
+#include <functional>
+
+namespace mozilla {
+namespace camera {
+
+// Historically the video engine was part of webrtc
+// it was removed (and reimplemented in Talk)
+class VideoEngine
+{
+private:
+  virtual ~VideoEngine (){};
+
+public:
+  VideoEngine (){};
+  NS_INLINE_DECL_REFCOUNTING(VideoEngine)
+
+  static RefPtr<VideoEngine> Create(UniquePtr<const webrtc::Config>&& aConfig);
+#if defined(ANDROID)
+  static int SetAndroidObjects(JavaVM* javaVM);
+#endif
+  void CreateVideoCapture(int32_t& id, const char* deviceUniqueIdUTF8);
+
+  int ReleaseVideoCapture(const int32_t id);
+
+  // VideoEngine is responsible for any cleanup in its modules
+  static void Delete(VideoEngine * engine) { }
+
+  /** Returns or creates a new new DeviceInfo.
+  *   It is cached to prevent repeated lengthy polling for "realness"
+  *   of the hardware devices.  This could be handled in a more elegant
+  *   way in the future.
+  *   @return on failure the shared_ptr will be null, otherwise it will contain a DeviceInfo.
+  *   @see bug 1305212 https://bugzilla.mozilla.org/show_bug.cgi?id=1305212
+  */
+  std::shared_ptr<webrtc::VideoCaptureModule::DeviceInfo> GetOrCreateVideoCaptureDeviceInfo();
+
+  void RemoveRenderer(int capnum);
+
+  const UniquePtr<const webrtc::Config>& GetConfiguration();
+
+  void Startup() {
+    mIsRunning = true;
+  }
+
+  void Shutdown() {
+    mIsRunning = false;
+  }
+
+  bool IsRunning() const {
+    return mIsRunning;
+  }
+
+  class CaptureEntry {
+  public:
+    CaptureEntry(int32_t aCapnum,
+                 rtc::scoped_refptr<webrtc::VideoCaptureModule> aCapture,
+                 webrtc::VideoRender* aRenderer);
+    int32_t Capnum() const;
+    rtc::scoped_refptr<webrtc::VideoCaptureModule> VideoCapture();
+    const UniquePtr<webrtc::VideoRender> & VideoRenderer();
+  private:
+    int32_t mCapnum;
+    rtc::scoped_refptr<webrtc::VideoCaptureModule> mVideoCaptureModule;
+    UniquePtr<webrtc::VideoRender> mVideoRender;
+    friend class VideoEngine;
+  };
+
+  // Returns true iff an entry for capnum exists
+  bool WithEntry(const int32_t entryCapnum, const std::function<void(CaptureEntry &entry)>&& fn);
+
+private:
+  explicit VideoEngine(UniquePtr<const webrtc::Config>&& aConfig);
+  bool mIsRunning;
+  int32_t mId;
+  webrtc::CaptureDeviceInfo mCaptureDevInfo;
+  std::shared_ptr<webrtc::VideoCaptureModule::DeviceInfo> mDeviceInfo;
+  UniquePtr<const webrtc::Config> mConfig;
+  std::map<int32_t, CaptureEntry> mCaps;
+
+  int32_t GenerateId();
+  static int32_t sId;
+};
+}
+}
+#endif