The Tor Browser: content/media/mediasource/SubBufferDecoder.h@a63d609f5ebe

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */

     3 /* This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #ifndef MOZILLA_SUBBUFFERDECODER_H_

     8 #define MOZILLA_SUBBUFFERDECODER_H_

    10 #include "BufferDecoder.h"

    11 #include "SourceBufferResource.h"

    13 namespace mozilla {

    15 class MediaSourceDecoder;

    17 class SubBufferDecoder : public BufferDecoder

    18 {

    19 public:

    20   // This class holds a weak pointer to MediaResource.  It's the responsibility

    21   // of the caller to manage the memory of the MediaResource object.

    22   SubBufferDecoder(MediaResource* aResource, MediaSourceDecoder* aParentDecoder)

    23     : BufferDecoder(aResource), mParentDecoder(aParentDecoder), mReader(nullptr)

    24   {

    25   }

    27   void SetReader(MediaDecoderReader* aReader)

    28   {

    29     MOZ_ASSERT(!mReader);

    30     mReader = aReader;

    31   }

    33   MediaDecoderReader* GetReader()

    34   {

    35     return mReader;

    36   }

    38   virtual ReentrantMonitor& GetReentrantMonitor() MOZ_OVERRIDE;

    39   virtual bool OnStateMachineThread() const MOZ_OVERRIDE;

    40   virtual bool OnDecodeThread() const MOZ_OVERRIDE;

    41   virtual SourceBufferResource* GetResource() const MOZ_OVERRIDE;

    42   virtual void SetMediaDuration(int64_t aDuration) MOZ_OVERRIDE;

    43   virtual void UpdateEstimatedMediaDuration(int64_t aDuration) MOZ_OVERRIDE;

    44   virtual void SetMediaSeekable(bool aMediaSeekable) MOZ_OVERRIDE;

    45   virtual void SetTransportSeekable(bool aTransportSeekable) MOZ_OVERRIDE;

    46   virtual layers::ImageContainer* GetImageContainer() MOZ_OVERRIDE;

    47   virtual MediaDecoderOwner* GetOwner() MOZ_OVERRIDE;

    49   void NotifyDataArrived(const char* aBuffer, uint32_t aLength, int64_t aOffset)

    50   {

    51     mReader->NotifyDataArrived(aBuffer, aLength, aOffset);

    53     // XXX: Params make no sense to parent decoder as it relates to a

    54     // specific SubBufferDecoder's data stream.  Pass bogus values here to

    55     // force parent decoder's state machine to recompute end time for

    56     // infinite length media.

    57     mParentDecoder->NotifyDataArrived(nullptr, 0, 0);

    58   }

    60   nsresult GetBuffered(dom::TimeRanges* aBuffered)

    61   {

    62     // XXX: Need mStartTime (from StateMachine) instead of passing 0.

    63     return mReader->GetBuffered(aBuffered, 0);

    64   }

    66   // Given a time convert it into an approximate byte offset from the

    67   // cached data. Returns -1 if no such value is computable.

    68   int64_t ConvertToByteOffset(double aTime);

    70   int64_t GetMediaDuration() MOZ_OVERRIDE

    71   {

    72     return mMediaDuration;

    73   }

    75 private:

    76   MediaSourceDecoder* mParentDecoder;

    77   nsAutoPtr<MediaDecoderReader> mReader;

    78   int64_t mMediaDuration;

    79 };

    81 } // namespace mozilla

    83 #endif /* MOZILLA_SUBBUFFERDECODER_H_ */

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