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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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_CamerasParent_h
#define mozilla_CamerasParent_h
#include "nsIObserver.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/camera/PCamerasParent.h"
#include "mozilla/ipc/Shmem.h"
#include "mozilla/ShmemPool.h"
#include "mozilla/Atomics.h"
// conflicts with #include of scoped_ptr.h
#undef FF
#include "webrtc/common.h"
// Video Engine
#include "webrtc/video_engine/include/vie_base.h"
#include "webrtc/video_engine/include/vie_capture.h"
#include "webrtc/video_engine/include/vie_render.h"
#include "CamerasChild.h"
#include "base/thread.h"
namespace mozilla {
namespace camera {
class CamerasParent;
class CallbackHelper : public webrtc::ExternalRenderer
{
public:
CallbackHelper(CaptureEngine aCapEng, int aCapId, CamerasParent *aParent)
: mCapEngine(aCapEng), mCapturerId(aCapId), mParent(aParent) {};
// ViEExternalRenderer implementation. These callbacks end up
// running on the VideoCapture thread.
virtual int FrameSizeChange(unsigned int w, unsigned int h,
unsigned int streams) override;
virtual int DeliverFrame(unsigned char* buffer,
size_t size,
uint32_t time_stamp,
int64_t ntp_time,
int64_t render_time,
void *handle) override;
virtual int DeliverI420Frame(const webrtc::I420VideoFrame& webrtc_frame) override;
virtual bool IsTextureSupported() override { return false; };
friend CamerasParent;
private:
CaptureEngine mCapEngine;
int mCapturerId;
CamerasParent *mParent;
};
class EngineHelper
{
public:
EngineHelper() :
mEngine(nullptr), mPtrViEBase(nullptr), mPtrViECapture(nullptr),
mPtrViERender(nullptr), mEngineIsRunning(false) {};
webrtc::VideoEngine *mEngine;
webrtc::ViEBase *mPtrViEBase;
webrtc::ViECapture *mPtrViECapture;
webrtc::ViERender *mPtrViERender;
// The webrtc code keeps a reference to this one.
webrtc::Config mConfig;
// Engine alive
bool mEngineIsRunning;
};
class InputObserver : public webrtc::ViEInputObserver
{
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(InputObserver)
explicit InputObserver(CamerasParent* aParent)
: mParent(aParent) {};
virtual void DeviceChange();
friend CamerasParent;
private:
~InputObserver() {}
RefPtr<CamerasParent> mParent;
};
class CamerasParent : public PCamerasParent,
public nsIObserver
{
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIOBSERVER
public:
static already_AddRefed<CamerasParent> Create();
// Messages received form the child. These run on the IPC/PBackground thread.
virtual bool RecvAllocateCaptureDevice(const CaptureEngine&, const nsCString&,
const nsCString&) override;
virtual bool RecvReleaseCaptureDevice(const CaptureEngine&,
const int&) override;
virtual bool RecvNumberOfCaptureDevices(const CaptureEngine&) override;
virtual bool RecvNumberOfCapabilities(const CaptureEngine&,
const nsCString&) override;
virtual bool RecvGetCaptureCapability(const CaptureEngine&, const nsCString&,
const int&) override;
virtual bool RecvGetCaptureDevice(const CaptureEngine&, const int&) override;
virtual bool RecvStartCapture(const CaptureEngine&, const int&,
const CaptureCapability&) override;
virtual bool RecvStopCapture(const CaptureEngine&, const int&) override;
virtual bool RecvReleaseFrame(mozilla::ipc::Shmem&&) override;
virtual bool RecvAllDone() override;
virtual void ActorDestroy(ActorDestroyReason aWhy) override;
virtual bool RecvEnsureInitialized(const CaptureEngine&) override;
nsIThread* GetBackgroundThread() { return mPBackgroundThread; };
bool IsShuttingDown() { return !mChildIsAlive
|| mDestroyed
|| !mWebRTCAlive; };
ShmemBuffer GetBuffer(size_t aSize);
// helper to forward to the PBackground thread
int DeliverFrameOverIPC(CaptureEngine capEng,
int cap_id,
ShmemBuffer buffer,
unsigned char* altbuffer,
size_t size,
uint32_t time_stamp,
int64_t ntp_time,
int64_t render_time);
CamerasParent();
protected:
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);
bool EnsureInitialized(int aEngine);
void CloseEngines();
void StopIPC();
void StopVideoCapture();
// Can't take already_AddRefed because it can fail in stupid ways.
nsresult DispatchToVideoCaptureThread(Runnable* event);
EngineHelper mEngines[CaptureEngine::MaxEngine];
nsTArray<CallbackHelper*> mCallbacks;
// image buffers
mozilla::ShmemPool mShmemPool;
// PBackground parent thread
nsCOMPtr<nsIThread> mPBackgroundThread;
// Monitors creation of the thread below
Monitor mThreadMonitor;
// video processing thread - where webrtc.org capturer code runs
base::Thread* mVideoCaptureThread;
// Shutdown handling
bool mChildIsAlive;
bool mDestroyed;
// Above 2 are PBackground only, but this is potentially
// read cross-thread.
mozilla::Atomic<bool> mWebRTCAlive;
nsTArray<RefPtr<InputObserver>> mObservers;
};
PCamerasParent* CreateCamerasParent();
} // namespace camera
} // namespace mozilla
#endif // mozilla_CameraParent_h
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