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/* ***** BEGIN LICENSE BLOCK *****
*
* $Id: dirac_byte_stream.h,v 1.4 2008/08/14 00:51:08 asuraparaju Exp $ $Name: $
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
*
* The Original Code is BBC Research and Development code.
*
* The Initial Developer of the Original Code is the British Broadcasting
* Corporation.
* Portions created by the Initial Developer are Copyright (C) 2004.
* All Rights Reserved.
*
* Contributor(s): Andrew Kennedy (Original Author)
* Anuradha Suraparaju
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License Version 2 (the "GPL"), or the GNU Lesser
* Public License Version 2.1 (the "LGPL"), in which case the provisions of
* the GPL or the LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the either
* the GPL or LGPL and not to allow others to use your version of this file
* under the MPL, indicate your decision by deleting the provisions above
* and replace them with the notice and other provisions required by the GPL
* or LGPL. If you do not delete the provisions above, a recipient may use
* your version of this file under the terms of any one of the MPL, the GPL
* or the LGPL.
* ***** END LICENSE BLOCK ***** */
/**
* Definition of class DiracByteStream
*/
#ifndef dirac_byte_stream_h
#define dirac_byte_stream_h
//SYSTEM INCLUDES
#include <queue>
//LOCAL INCLUDES
#include "byteio.h" // Parent class
#include "accessunit_byteio.h" // manages parse-unit types
#include "picture_byteio.h" // manages parse-unit types
namespace dirac
{
/**
* Represents a series of bytes in the Dirac bytestream specfication format.
* These bytes are grouped into more managable parse units by this class.
*/
class DiracByteStream : public ByteIO
{
public:
/**
* Constructor
*/
DiracByteStream();
/**
* Destructor
*/
~DiracByteStream();
/**
* Adds Dirac-formatted bytes to internal-byte-stream for processing
*@param start Start of char list
*@param count Number of chars
*/
void AddBytes(char* start, int count);
/**
* Gets the statistics of the most recent parse-unit to be processed
*@return Byte-statistics
*/
DiracByteStats GetLastUnitStats();
/**
* Gets the next parse-unit in the current byte-stream
*/
ParseUnitByteIO* GetNextParseUnit();
/**
* Gets stats for current sequence
*/
DiracByteStats GetSequenceStats() const;
/**
* Adds a random access point to the current Dirac byte stream
*@param p_seqheader_byteio Sequence header data.
*/
void AddSequenceHeader(SequenceHeaderByteIO *p_seqheader_byteio);
/**
* Adds a picture to the current Dirac byte stream
*@param p_frame_byteio Picture stream. This class is now responsible for deleting.
*/
void AddPicture(PictureByteIO *p_frame_byteio);
/**
* Clear parse-units
*/
void Clear();
/**
* Insert end-of-sequence data
*@return Sequence stats
*/
DiracByteStats EndSequence();
/**
* Gets a pointer to all current output bytes
*/
const std::string GetBytes();
/**
* Any info pending?
*/
bool IsUnitAvailable() const;
private:
void Reset(ParseUnitByteIO* p_curr_unit, int pos);
private:
/**
* Parse-units in Dirac stream
*/
typedef std::queue< std::pair <ParseUnitType, ParseUnitByteIO*> > ParseUnitList;
ParseUnitList m_parse_unit_list;
/**
* Last unit to be processed
* Required for specifying the previous parse-unit
*/
ParseUnitByteIO* mp_prev_parse_unit;
/**
* Stats for current sequence
*/
DiracByteStats m_sequence_stats;
};
} // namespace dirac
#endif
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