michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef DOM_CAMERA_CAMERAPREVIEWMEDIASTREAM_H
michael@0: #define DOM_CAMERA_CAMERAPREVIEWMEDIASTREAM_H
michael@0: 
michael@0: #include "VideoFrameContainer.h"
michael@0: #include "MediaStreamGraph.h"
michael@0: #include "mozilla/Mutex.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: class CameraPreviewFrameCallback {
michael@0: public:
michael@0:   virtual void OnNewFrame(const gfxIntSize& aIntrinsicSize, layers::Image* aImage) = 0;
michael@0: };
michael@0: 
michael@0: /**
michael@0:  * This is a stream for camere preview.
michael@0:  *
michael@0:  * XXX It is a temporary fix of SourceMediaStream.
michael@0:  * A camera preview requests no delay and no buffering stream.
michael@0:  * But the SourceMediaStream do not support it.
michael@0:  */
michael@0: class CameraPreviewMediaStream : public MediaStream
michael@0: {
michael@0:   typedef mozilla::layers::Image Image;
michael@0: 
michael@0: public:
michael@0:   CameraPreviewMediaStream(DOMMediaStream* aWrapper);
michael@0: 
michael@0:   virtual void AddAudioOutput(void* aKey) MOZ_OVERRIDE;
michael@0:   virtual void SetAudioOutputVolume(void* aKey, float aVolume) MOZ_OVERRIDE;
michael@0:   virtual void RemoveAudioOutput(void* aKey) MOZ_OVERRIDE;
michael@0:   virtual void AddVideoOutput(VideoFrameContainer* aContainer) MOZ_OVERRIDE;
michael@0:   virtual void RemoveVideoOutput(VideoFrameContainer* aContainer) MOZ_OVERRIDE;
michael@0:   virtual void ChangeExplicitBlockerCount(int32_t aDelta) MOZ_OVERRIDE;
michael@0:   virtual void AddListener(MediaStreamListener* aListener) MOZ_OVERRIDE;
michael@0:   virtual void RemoveListener(MediaStreamListener* aListener) MOZ_OVERRIDE;
michael@0:   virtual void Destroy();
michael@0: 
michael@0:   // Call these on any thread.
michael@0:   void SetCurrentFrame(const gfxIntSize& aIntrinsicSize, Image* aImage);
michael@0:   void ClearCurrentFrame();
michael@0: 
michael@0:   void SetFrameCallback(CameraPreviewFrameCallback* aCallback) {
michael@0:     mFrameCallback = aCallback;
michael@0:   }
michael@0: 
michael@0: protected:
michael@0:   // mMutex protects all the class' fields.
michael@0:   // This class is not registered to MediaStreamGraph.
michael@0:   // It needs to protect all the fields.
michael@0:   Mutex mMutex;
michael@0:   CameraPreviewFrameCallback* mFrameCallback;
michael@0: };
michael@0: 
michael@0: }
michael@0: 
michael@0: #endif // DOM_CAMERA_CAMERAPREVIEWMEDIASTREAM_H