FakeVideoSource.h - mozsearch

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=2 et sw=2 tw=80: */

/* 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 DOM_MEDIA_SYSTEMSERVICES_FAKEVIDEOSOURCE_H_

#define DOM_MEDIA_SYSTEMSERVICES_FAKEVIDEOSOURCE_H_

#include "mozilla/EventTargetCapability.h"

#include "mozilla/Maybe.h"

#include "mozilla/Mutex.h"

#include "mozilla/ThreadSafety.h"

#include "MediaEventSource.h"

#include "PerformanceRecorder.h"

class nsITimer;

namespace mozilla {

class TimeStamp;

class TimeDurationValueCalculator;

template <typename T>

class BaseTimeDuration;

typedef BaseTimeDuration<TimeDurationValueCalculator> TimeDuration;

namespace layers {

class Image;

class ImageContainer;

}  // namespace layers

class FakeVideoSource {

 public:

  explicit FakeVideoSource(nsISerialEventTarget* aTarget);

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FakeVideoSource)

  int32_t StartCapture(int32_t aWidth, int32_t aHeight,

                       const TimeDuration& aFrameInterval);

  int32_t StopCapture();

  bool CaptureStarted();

  void SetTrackingId(uint32_t aTrackingIdProcId);

  MediaEventSource<RefPtr<layers::Image>>& GeneratedImageEvent() {

    return mGeneratedImageEvent;

 private:

  ~FakeVideoSource();

/**

   * Called by mTimer when it's time to generate a new image.

*/

  void GenerateImage() MOZ_REQUIRES(mTarget);

  Mutex mMutex{"FakeVideoSource::mMutex"};

  nsCOMPtr<nsITimer> mTimer MOZ_GUARDED_BY(mMutex);

  PerformanceRecorderMulti<CaptureStage> mCaptureRecorder;

  MediaEventProducer<RefPtr<layers::Image>> mGeneratedImageEvent;

  EventTargetCapability<nsISerialEventTarget> mTarget;

  Maybe<TrackingId> mTrackingId MOZ_GUARDED_BY(mTarget);

  RefPtr<layers::ImageContainer> mImageContainer MOZ_GUARDED_BY(mTarget);

  int32_t mWidth MOZ_GUARDED_BY(mTarget) = -1;

  int32_t mHeight MOZ_GUARDED_BY(mTarget) = -1;

  int mCb MOZ_GUARDED_BY(mTarget) = 16;

  int mCr MOZ_GUARDED_BY(mTarget) = 16;

};

}  // namespace mozilla

#endif