DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (882de07e4cbe)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209
/* -*- 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/. */
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_CamerasParent_h
#define mozilla_CamerasParent_h

#include "VideoEngine.h"
#include "VideoEngine.h"
#include "mozilla/camera/PCamerasParent.h"
#include "mozilla/ipc/Shmem.h"
#include "mozilla/ShmemPool.h"
#include "mozilla/Atomics.h"
#include "mozilla/Atomics.h"
#include "webrtc/modules/video_capture/video_capture.h"
#include "webrtc/modules/video_capture/video_capture_defines.h"
#include "webrtc/common_video/include/incoming_video_stream.h"
#include "webrtc/media/base/videosinkinterface.h"


// conflicts with #include of scoped_ptr.h
#undef FF
#include "webrtc/common_types.h"

#include "CamerasChild.h"
#include "CamerasChild.h"

#include "base/thread.h"

namespace mozilla {


namespace camera {

class CamerasParent;
class CamerasParent;

class CallbackHelper : public rtc::VideoSinkInterface<webrtc::VideoFrame> {
 public:
  CallbackHelper(CaptureEngine aCapEng, uint32_t aStreamId,
                 CamerasParent* aParent)
                 CamerasParent* aParent)
      : mCapEngine(aCapEng), mStreamId(aStreamId), mParent(aParent){};

  // These callbacks end up running on the VideoCapture thread.
  // From  VideoCaptureCallback
  void OnFrame(const webrtc::VideoFrame& videoFrame) override;
  void OnFrame(const webrtc::VideoFrame& videoFrame) override;

  friend CamerasParent;

 private:
  CaptureEngine mCapEngine;
  CaptureEngine mCapEngine;
  uint32_t mStreamId;
  CamerasParent* mParent;
};

class InputObserver : public webrtc::VideoInputFeedBack {
 public:
  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(InputObserver)
  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(InputObserver)

  explicit InputObserver(CamerasParent* aParent) : mParent(aParent){};

  virtual void OnDeviceChange() override;


  friend CamerasParent;

 private:
  ~InputObserver() = default;


  RefPtr<CamerasParent> mParent;
};

class CamerasParent final : public PCamerasParent,
                            public nsIAsyncShutdownBlocker {
  NS_DECL_THREADSAFE_ISUPPORTS

 public:
  static already_AddRefed<CamerasParent> Create();
  static already_AddRefed<CamerasParent> Create();

  // Messages received form the child. These run on the IPC/PBackground thread.
  mozilla::ipc::IPCResult RecvAllocateCaptureDevice(
      const CaptureEngine& aEngine, const nsCString& aUnique_idUTF8,
      const uint64_t& aWindowID) override;
      const uint64_t& aWindowID) override;
  mozilla::ipc::IPCResult RecvReleaseCaptureDevice(const CaptureEngine&,
                                                   const int&) override;
  mozilla::ipc::IPCResult RecvNumberOfCaptureDevices(
      const CaptureEngine&) override;
  mozilla::ipc::IPCResult RecvNumberOfCapabilities(const CaptureEngine&,
  mozilla::ipc::IPCResult RecvNumberOfCapabilities(const CaptureEngine&,
                                                   const nsCString&) override;
  mozilla::ipc::IPCResult RecvGetCaptureCapability(const CaptureEngine&,
                                                   const nsCString&,
                                                   const int&) override;
  mozilla::ipc::IPCResult RecvGetCaptureDevice(const CaptureEngine&,
  mozilla::ipc::IPCResult RecvGetCaptureDevice(const CaptureEngine&,
                                               const int&) override;
  mozilla::ipc::IPCResult RecvStartCapture(
      const CaptureEngine&, const int&, const VideoCaptureCapability&) override;
  mozilla::ipc::IPCResult RecvFocusOnSelectedSource(const CaptureEngine&,
                                                    const int&) override;
                                                    const int&) override;
  mozilla::ipc::IPCResult RecvStopCapture(const CaptureEngine&,
                                          const int&) override;
  mozilla::ipc::IPCResult RecvReleaseFrame(mozilla::ipc::Shmem&&) override;
  mozilla::ipc::IPCResult RecvAllDone() override;
  void ActorDestroy(ActorDestroyReason aWhy) override;
  mozilla::ipc::IPCResult RecvEnsureInitialized(const CaptureEngine&) override;

  nsIEventTarget* GetBackgroundEventTarget() {
    return mPBackgroundEventTarget;
    return mPBackgroundEventTarget;
  };
  bool IsShuttingDown() {
    return !mChildIsAlive || mDestroyed || !mWebRTCAlive;
  };
  ShmemBuffer GetBuffer(size_t aSize);
  ShmemBuffer GetBuffer(size_t aSize);

  // helper to forward to the PBackground thread
  int DeliverFrameOverIPC(CaptureEngine capEng, uint32_t aStreamId,
                          ShmemBuffer buffer, unsigned char* altbuffer,
                          VideoFrameProperties& aProps);
                          VideoFrameProperties& aProps);

  CamerasParent();

 protected:
  virtual ~CamerasParent();
  virtual ~CamerasParent();

  // We use these helpers for shutdown and for the respective IPC commands.
  void StopCapture(const CaptureEngine& aCapEngine, const int& capnum);
  int ReleaseCaptureDevice(const CaptureEngine& aCapEngine, const int& capnum);


  bool SetupEngine(CaptureEngine aCapEngine);
  VideoEngine* EnsureInitialized(int aEngine);
  void CloseEngines();
  void StopIPC();
  void StopVideoCapture();
  nsresult DispatchToVideoCaptureThread(RefPtr<Runnable> event);
  NS_IMETHOD BlockShutdown(nsIAsyncShutdownClient*) override;
  NS_IMETHOD GetName(nsAString& aName) override {
    aName = mName;
    aName = mName;
    return NS_OK;
  }
  NS_IMETHOD GetState(nsIPropertyBag**) override { return NS_OK; }
  static nsString GetNewName();

  // sEngines will be accessed by VideoCapture thread only
  // sNumOfCamerasParent, sNumOfOpenCamerasParentEngines, and
  // sVideoCaptureThread will be accessed by main thread / PBackground thread /
  // sVideoCaptureThread will be accessed by main thread / PBackground thread /
  // VideoCapture thread sNumOfCamerasParent and sThreadMonitor create & delete
  // are protected by sMutex sNumOfOpenCamerasParentEngines and
  // sVideoCaptureThread are protected by sThreadMonitor
  static StaticRefPtr<VideoEngine> sEngines[CaptureEngine::MaxEngine];
  static int32_t sNumOfOpenCamerasParentEngines;
  static int32_t sNumOfOpenCamerasParentEngines;
  static int32_t sNumOfCamerasParents;
  nsTArray<CallbackHelper*> mCallbacks;
  nsString mName;

  // image buffers
  // image buffers
  ShmemPool mShmemPool;

  // PBackground parent thread
  nsCOMPtr<nsISerialEventTarget> mPBackgroundEventTarget;


  static StaticMutex sMutex;
  static Monitor* sThreadMonitor;

  // video processing thread - where webrtc.org capturer code runs
  static base::Thread* sVideoCaptureThread;
  static base::Thread* sVideoCaptureThread;

  // Shutdown handling
  bool mChildIsAlive;
  bool mDestroyed;
  // Above 2 are PBackground only, but this is potentially
  // read cross-thread.
  Atomic<bool> mWebRTCAlive;
  Atomic<bool> mWebRTCAlive;
  RefPtr<InputObserver> mCameraObserver;
  std::map<nsCString, std::map<uint32_t, webrtc::VideoCaptureCapability>>
      mAllCandidateCapabilities;
};


PCamerasParent* CreateCamerasParent();

}  // namespace camera
}  // namespace mozilla


#endif  // mozilla_CameraParent_h