laswritepoint.hpp

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/*
===============================================================================

  FILE:  LASwritePoint.hpp
  
  CONTENTS:
  
    Common interface for the classes that write points raw or compressed.

  PROGRAMMERS:
  
    martin.isenburg@gmail.com
  
  COPYRIGHT:

    (c) 2007-2011, Martin Isenburg, LASSO - tools to catch reality

    This is free software; you can redistribute and/or modify it under the
    terms of the GNU Lesser General Licence as published by the Free Software
    Foundation. See the COPYING file for more information.

    This software is distributed WITHOUT ANY WARRANTY and without even the
    implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  
  CHANGE HISTORY:
  
    6 October 2011 -- large file support & reading with missing chunk table
    9 May 2011 -- the chunked compressor now allows variable chunk sizes
    25 April 2011 -- added chunked laszip for random access decompression
    10 January 2011 -- licensing change for LGPL release and liblas integration
    7 December 2010 -- adapted from LASpointWriter for better code modularity
    3 December 2010 -- updated to (somewhat) support LAS format 1.3
    7 September 2008 -- updated to support LAS format 1.2 
    22 February 2007 -- created about an hour before henna's birthday
  
===============================================================================
*/
#ifndef LAS_WRITE_POINT_H
#define LAS_WRITE_POINT_H

#include "mydefs.hpp"
#include "laszip.hpp"
#include "bytestreamout.hpp"

class LASwriteItem;
class EntropyEncoder;

class LASwritePoint
{
public:
  LASwritePoint();
  ~LASwritePoint();

  // should only be called *once*
  BOOL setup(const U32 num_items, const LASitem* items, const LASzip* laszip=0);

  BOOL init(ByteStreamOut* outstream);
  BOOL write(const U8 * const * point);
  BOOL chunk();
  BOOL done();

private:
  ByteStreamOut* outstream;
  U32 num_writers;
  LASwriteItem** writers;
  LASwriteItem** writers_raw;
  LASwriteItem** writers_compressed;
  EntropyEncoder* enc;
  // used for chunking
  U32 chunk_size;
  U32 chunk_count;
  U32 number_chunks;
  U32 alloced_chunks;
  U32* chunk_sizes;
  U32* chunk_bytes;
  I64 chunk_start_position;
  I64 chunk_table_start_position;
  BOOL add_chunk_to_table();
  BOOL write_chunk_table();
};

#endif