text: /*
   * Copyright (C) 2011, British Broadcasting Corporation
   * All Rights Reserved.
   *
   * Author: Philip de Nier
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   *     * Redistributions of source code must retain the above copyright notice,
   *       this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in the
   *       documentation and/or other materials provided with the distribution.
   *     * Neither the name of the British Broadcasting Corporation nor the names
   *       of its contributors may be used to endorse or promote products derived
   *       from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef BMX_MPEG2LG_WRITER_HELPER_H_
  #define BMX_MPEG2LG_WRITER_HELPER_H_
  
  #include <vector>
  
  #include <bmx/essence_parser/MPEG2EssenceParser.h>
  
  
  
  namespace bmx
  {
  
  
  class MPEG2LGWriterHelper
  {
  public:
      typedef enum
      {
          DEFAULT_FLAVOUR,
          AVID_FLAVOUR,
      } Flavour;
  
  public:
      MPEG2LGWriterHelper();
      ~MPEG2LGWriterHelper();
  
      void SetFlavour(Flavour flavour);
  
  public:
      void ProcessFrame(const unsigned char *data, uint32_t size);
  
      bool CheckTemporalOffsetsComplete(int64_t end_offset);
  
  public:
      int64_t GetFramePosition() const        { return mPosition - 1; }
  
      uint32_t GetTemporalReference() const   { return mTemporalReference; }
  
      bool HaveTemporalOffset() const         { return mHaveTemporalOffset; }
      int8_t GetTemporalOffset() const        { return mHaveTemporalOffset ? mTemporalOffset : 0; }
      bool HavePrevTemporalOffset() const     { return mHavePrevTemporalOffset; }
      int8_t GetPrevTemporalOffset() const    { return mHavePrevTemporalOffset ? mPrevTemporalOffset : 0; }
      int8_t GetKeyFrameOffset() const        { return mKeyFrameOffset; }
      uint8_t GetFlags() const                { return mFlags; }
  
      bool HaveGOPHeader() const              { return mHaveGOPHeader; }
      bool GetSingleSequence() const          { return mSingleSequence; }
      int16_t GetBPictureCount() const        { return mBPictureCount; }
      bool GetConstantBFrames() const         { return mConstantBFrames; }
      bool GetLowDelay() const                { return mLowDelay; }
      bool GetClosedGOP() const               { return mClosedGOP; }
      bool GetIdenticalGOP() const            { return mIdenticalGOP; }
      uint16_t GetMaxGOP() const              { return mMaxGOP; }
      uint16_t GetMaxBPictureCount() const    { return mMaxBPictureCount; }
      uint32_t GetBitRate() const             { return mBitRate; }
  
  private:
      Flavour mFlavour;
  
      MPEG2EssenceParser mEssenceParser;
  
      int64_t mPosition;
  
      int64_t mPrevKeyFramePosition;
      int64_t mKeyFramePosition;
      int8_t mKeyFrameTemporalReference;
      int8_t mGOPTemporalOffsets[256];
  
      int64_t mGOPStartPosition;
      bool mFirstGOP;
      std::vector<int> mGOPStructure;
  
      uint32_t mTemporalReference;
  
      bool mHaveTemporalOffset;
      int8_t mTemporalOffset;
      bool mHavePrevTemporalOffset;
      int8_t mPrevTemporalOffset;
      int8_t mKeyFrameOffset;
      uint8_t mFlags;
  
      bool mHaveGOPHeader;
      bool mSingleSequence;
      uint16_t mBPictureCount;
      bool mConstantBFrames;
      bool mLowDelay;
      bool mClosedGOP;
      bool mCurrentGOPClosed;
      bool mIdenticalGOP;
      uint16_t mMaxGOP;
      bool mUnlimitedGOPSize;
      uint16_t mMaxBPictureCount;
      uint32_t mBitRate;
  };
  
  
  
  };
  
  
  #endif
  
  