michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim: set ts=8 sts=2 et sw=2 tw=80: */
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
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef MOZILLA_SUBBUFFERDECODER_H_
michael@0: #define MOZILLA_SUBBUFFERDECODER_H_
michael@0: 
michael@0: #include "BufferDecoder.h"
michael@0: #include "SourceBufferResource.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: class MediaSourceDecoder;
michael@0: 
michael@0: class SubBufferDecoder : public BufferDecoder
michael@0: {
michael@0: public:
michael@0:   // This class holds a weak pointer to MediaResource.  It's the responsibility
michael@0:   // of the caller to manage the memory of the MediaResource object.
michael@0:   SubBufferDecoder(MediaResource* aResource, MediaSourceDecoder* aParentDecoder)
michael@0:     : BufferDecoder(aResource), mParentDecoder(aParentDecoder), mReader(nullptr)
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   void SetReader(MediaDecoderReader* aReader)
michael@0:   {
michael@0:     MOZ_ASSERT(!mReader);
michael@0:     mReader = aReader;
michael@0:   }
michael@0: 
michael@0:   MediaDecoderReader* GetReader()
michael@0:   {
michael@0:     return mReader;
michael@0:   }
michael@0: 
michael@0:   virtual ReentrantMonitor& GetReentrantMonitor() MOZ_OVERRIDE;
michael@0:   virtual bool OnStateMachineThread() const MOZ_OVERRIDE;
michael@0:   virtual bool OnDecodeThread() const MOZ_OVERRIDE;
michael@0:   virtual SourceBufferResource* GetResource() const MOZ_OVERRIDE;
michael@0:   virtual void SetMediaDuration(int64_t aDuration) MOZ_OVERRIDE;
michael@0:   virtual void UpdateEstimatedMediaDuration(int64_t aDuration) MOZ_OVERRIDE;
michael@0:   virtual void SetMediaSeekable(bool aMediaSeekable) MOZ_OVERRIDE;
michael@0:   virtual void SetTransportSeekable(bool aTransportSeekable) MOZ_OVERRIDE;
michael@0:   virtual layers::ImageContainer* GetImageContainer() MOZ_OVERRIDE;
michael@0:   virtual MediaDecoderOwner* GetOwner() MOZ_OVERRIDE;
michael@0: 
michael@0:   void NotifyDataArrived(const char* aBuffer, uint32_t aLength, int64_t aOffset)
michael@0:   {
michael@0:     mReader->NotifyDataArrived(aBuffer, aLength, aOffset);
michael@0: 
michael@0:     // XXX: Params make no sense to parent decoder as it relates to a
michael@0:     // specific SubBufferDecoder's data stream.  Pass bogus values here to
michael@0:     // force parent decoder's state machine to recompute end time for
michael@0:     // infinite length media.
michael@0:     mParentDecoder->NotifyDataArrived(nullptr, 0, 0);
michael@0:   }
michael@0: 
michael@0:   nsresult GetBuffered(dom::TimeRanges* aBuffered)
michael@0:   {
michael@0:     // XXX: Need mStartTime (from StateMachine) instead of passing 0.
michael@0:     return mReader->GetBuffered(aBuffered, 0);
michael@0:   }
michael@0: 
michael@0:   // Given a time convert it into an approximate byte offset from the
michael@0:   // cached data. Returns -1 if no such value is computable.
michael@0:   int64_t ConvertToByteOffset(double aTime);
michael@0: 
michael@0:   int64_t GetMediaDuration() MOZ_OVERRIDE
michael@0:   {
michael@0:     return mMediaDuration;
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   MediaSourceDecoder* mParentDecoder;
michael@0:   nsAutoPtr<MediaDecoderReader> mReader;
michael@0:   int64_t mMediaDuration;
michael@0: };
michael@0: 
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif /* MOZILLA_SUBBUFFERDECODER_H_ */