// Constructor & Deconstructor
public IntegerCompressor(ArithmeticEncoder enc, uint bits = 16, uint contexts = 1, uint bits_high = 8, uint range = 0)
{
Debug.Assert(enc != null);
this.enc = enc;
this.dec = null;
Init(bits, contexts, bits_high, range);
}
// Constructor & Deconstructor
public IntegerCompressor(ArithmeticEncoder enc, uint bits=16, uint contexts=1, uint bits_high=8, uint range=0)
{
Debug.Assert(enc!=null);
this.enc=enc;
this.dec=null;
Init(bits, contexts, bits_high, range);
}
public LASwriteItemCompressed_GPSTIME11_v2(ArithmeticEncoder enc)
{
// set encoder
Debug.Assert(enc!=null);
this.enc=enc;
// create entropy models and integer compressors
m_gpstime_multi=enc.createSymbolModel(LASZIP_GPSTIME_MULTI_TOTAL);
m_gpstime_0diff=enc.createSymbolModel(6);
ic_gpstime=new IntegerCompressor(enc, 32, 9); // 32 bits, 9 contexts
}
public LASwriteItemCompressed_GPSTIME11_v2(ArithmeticEncoder enc)
{
// set encoder
Debug.Assert(enc != null);
this.enc = enc;
// create entropy models and integer compressors
m_gpstime_multi = enc.createSymbolModel(LASZIP_GPSTIME_MULTI_TOTAL);
m_gpstime_0diff = enc.createSymbolModel(6);
ic_gpstime = new IntegerCompressor(enc, 32, 9); // 32 bits, 9 contexts
}
public LASwriteItemCompressed_RGB12_v2(ArithmeticEncoder enc)
{
// set encoder
Debug.Assert(enc != null);
this.enc = enc;
// create models and integer compressors
m_byte_used = enc.createSymbolModel(128);
m_rgb_diff_0 = enc.createSymbolModel(256);
m_rgb_diff_1 = enc.createSymbolModel(256);
m_rgb_diff_2 = enc.createSymbolModel(256);
m_rgb_diff_3 = enc.createSymbolModel(256);
m_rgb_diff_4 = enc.createSymbolModel(256);
m_rgb_diff_5 = enc.createSymbolModel(256);
}
public LASwriteItemCompressed_RGB12_v2(ArithmeticEncoder enc)
{
// set encoder
Debug.Assert(enc!=null);
this.enc=enc;
// create models and integer compressors
m_byte_used=enc.createSymbolModel(128);
m_rgb_diff_0=enc.createSymbolModel(256);
m_rgb_diff_1=enc.createSymbolModel(256);
m_rgb_diff_2=enc.createSymbolModel(256);
m_rgb_diff_3=enc.createSymbolModel(256);
m_rgb_diff_4=enc.createSymbolModel(256);
m_rgb_diff_5=enc.createSymbolModel(256);
}
public LASwriteItemCompressed_WAVEPACKET13_v1(ArithmeticEncoder enc)
{
// set encoder
Debug.Assert(enc != null);
this.enc = enc;
// create models and integer compressors
m_packet_index = enc.createSymbolModel(256);
m_offset_diff[0] = enc.createSymbolModel(4);
m_offset_diff[1] = enc.createSymbolModel(4);
m_offset_diff[2] = enc.createSymbolModel(4);
m_offset_diff[3] = enc.createSymbolModel(4);
ic_offset_diff = new IntegerCompressor(enc, 32);
ic_packet_size = new IntegerCompressor(enc, 32);
ic_return_point = new IntegerCompressor(enc, 32);
ic_xyz = new IntegerCompressor(enc, 32, 3);
}
public LASwriteItemCompressed_BYTE_v2(ArithmeticEncoder enc, uint number)
{
// set encoder
Debug.Assert(enc!=null);
this.enc=enc;
Debug.Assert(number>0);
this.number=number;
// create models and integer compressors
m_byte=new ArithmeticModel[number];
for(uint i=0; i<number; i++)
{
m_byte[i]=enc.createSymbolModel(256);
}
// create last item
last_item=new byte[number];
}
public LASwriteItemCompressed_BYTE_v2(ArithmeticEncoder enc, uint number)
{
// set encoder
Debug.Assert(enc != null);
this.enc = enc;
Debug.Assert(number > 0);
this.number = number;
// create models and integer compressors
m_byte = new ArithmeticModel[number];
for (uint i = 0; i < number; i++)
{
m_byte[i] = enc.createSymbolModel(256);
}
// create last item
last_item = new byte[number];
}
public LASwriteItemCompressed_POINT10_v2(ArithmeticEncoder enc)
{
// set encoder
Debug.Assert(enc!=null);
this.enc=enc;
// create models and integer compressors
ic_dx=new IntegerCompressor(enc, 32, 2); // 32 bits, 2 context
ic_dy=new IntegerCompressor(enc, 32, 22); // 32 bits, 22 contexts
ic_z=new IntegerCompressor(enc, 32, 20); // 32 bits, 20 contexts
ic_intensity=new IntegerCompressor(enc, 16, 4);
m_scan_angle_rank[0]=enc.createSymbolModel(256);
m_scan_angle_rank[1]=enc.createSymbolModel(256);
ic_point_source_ID=new IntegerCompressor(enc, 16);
m_changed_values=enc.createSymbolModel(64);
for(int i=0; i<256; i++)
{
m_bit_byte[i]=null;
m_classification[i]=null;
m_user_data[i]=null;
}
}
public LASwriteItemCompressed_POINT10_v2(ArithmeticEncoder enc)
{
// set encoder
Debug.Assert(enc != null);
this.enc = enc;
// create models and integer compressors
ic_dx = new IntegerCompressor(enc, 32, 2); // 32 bits, 2 context
ic_dy = new IntegerCompressor(enc, 32, 22); // 32 bits, 22 contexts
ic_z = new IntegerCompressor(enc, 32, 20); // 32 bits, 20 contexts
ic_intensity = new IntegerCompressor(enc, 16, 4);
m_scan_angle_rank[0] = enc.createSymbolModel(256);
m_scan_angle_rank[1] = enc.createSymbolModel(256);
ic_point_source_ID = new IntegerCompressor(enc, 16);
m_changed_values = enc.createSymbolModel(64);
for (int i = 0; i < 256; i++)
{
m_bit_byte[i] = null;
m_classification[i] = null;
m_user_data[i] = null;
}
}
// should only be called *once*
public bool setup(uint num_items, LASitem[] items, LASzip laszip=null)
{
// is laszip exists then we must use its items
if(laszip!=null)
{
if(num_items!=laszip.num_items) return false;
if(items!=laszip.items) return false;
}
// create entropy encoder (if requested)
enc=null;
if(laszip!=null&&laszip.compressor!=0)
{
switch(laszip.coder)
{
case LASzip.CODER_ARITHMETIC: enc=new ArithmeticEncoder(); break;
default: return false; // entropy decoder not supported
}
}
// initizalize the writers
writers=null;
num_writers=num_items;
// disable chunking
chunk_size=uint.MaxValue;
// always create the raw writers
writers_raw=new LASwriteItem[num_writers];
for(uint i=0; i<num_writers; i++)
{
switch(items[i].type)
{
case LASitem.Type.POINT10: writers_raw[i]=new LASwriteItemRaw_POINT10(); break;
case LASitem.Type.GPSTIME11: writers_raw[i]=new LASwriteItemRaw_GPSTIME11(); break;
case LASitem.Type.RGB12: writers_raw[i]=new LASwriteItemRaw_RGB12(); break;
case LASitem.Type.WAVEPACKET13: writers_raw[i]=new LASwriteItemRaw_WAVEPACKET13(); break;
case LASitem.Type.BYTE: writers_raw[i]=new LASwriteItemRaw_BYTE(items[i].size); break;
case LASitem.Type.POINT14: writers_raw[i]=new LASwriteItemRaw_POINT14(); break;
case LASitem.Type.RGBNIR14: writers_raw[i]=new LASwriteItemRaw_RGBNIR14(); break;
default: return false;
}
}
// if needed create the compressed writers and set versions
if(enc!=null)
{
writers_compressed=new LASwriteItem[num_writers];
for(uint i=0; i<num_writers; i++)
{
switch(items[i].type)
{
case LASitem.Type.POINT10:
if(items[i].version==1) throw new NotSupportedException("Version 1 POINT10 is no longer supported, use version 2.");
else if(items[i].version==2) writers_compressed[i]=new LASwriteItemCompressed_POINT10_v2(enc);
else return false;
break;
case LASitem.Type.GPSTIME11:
if(items[i].version==1) throw new NotSupportedException("Version 1 GPSTIME11 is no longer supported, use version 2.");
else if(items[i].version==2) writers_compressed[i]=new LASwriteItemCompressed_GPSTIME11_v2(enc);
else return false;
break;
case LASitem.Type.RGB12:
if(items[i].version==1) throw new NotSupportedException("Version 1 RGB12 is no longer supported, use version 2.");
else if(items[i].version==2) writers_compressed[i]=new LASwriteItemCompressed_RGB12_v2(enc);
else return false;
break;
case LASitem.Type.WAVEPACKET13:
if(items[i].version==1) writers_compressed[i]=new LASwriteItemCompressed_WAVEPACKET13_v1(enc);
else return false;
break;
case LASitem.Type.BYTE:
if(items[i].version==1) throw new NotSupportedException("Version 1 BYTE is no longer supported, use version 2.");
else if(items[i].version==2) writers_compressed[i]=new LASwriteItemCompressed_BYTE_v2(enc, items[i].size);
else return false;
break;
default: return false;
}
}
if(laszip.compressor==LASzip.COMPRESSOR_POINTWISE_CHUNKED)
{
if(laszip.chunk_size!=0) chunk_size=laszip.chunk_size;
chunk_count=0;
init_chunking=true;
}
}
return true;
}
// should only be called *once*
public bool setup(uint num_items, LASitem[] items, LASzip laszip = null)
{
// is laszip exists then we must use its items
if (laszip != null)
{
if (num_items != laszip.num_items)
{
return(false);
}
if (items != laszip.items)
{
return(false);
}
}
// create entropy encoder (if requested)
enc = null;
if (laszip != null && laszip.compressor != 0)
{
switch (laszip.coder)
{
case LASzip.CODER_ARITHMETIC: enc = new ArithmeticEncoder(); break;
default: return(false); // entropy decoder not supported
}
}
// initizalize the writers
writers = null;
num_writers = num_items;
// disable chunking
chunk_size = uint.MaxValue;
// always create the raw writers
writers_raw = new LASwriteItem[num_writers];
for (uint i = 0; i < num_writers; i++)
{
switch (items[i].type)
{
case LASitem.Type.POINT10: writers_raw[i] = new LASwriteItemRaw_POINT10(); break;
case LASitem.Type.GPSTIME11: writers_raw[i] = new LASwriteItemRaw_GPSTIME11(); break;
case LASitem.Type.RGB12: writers_raw[i] = new LASwriteItemRaw_RGB12(); break;
case LASitem.Type.WAVEPACKET13: writers_raw[i] = new LASwriteItemRaw_WAVEPACKET13(); break;
case LASitem.Type.BYTE: writers_raw[i] = new LASwriteItemRaw_BYTE(items[i].size); break;
case LASitem.Type.POINT14: writers_raw[i] = new LASwriteItemRaw_POINT14(); break;
case LASitem.Type.RGBNIR14: writers_raw[i] = new LASwriteItemRaw_RGBNIR14(); break;
default: return(false);
}
}
// if needed create the compressed writers and set versions
if (enc != null)
{
writers_compressed = new LASwriteItem[num_writers];
for (uint i = 0; i < num_writers; i++)
{
switch (items[i].type)
{
case LASitem.Type.POINT10:
if (items[i].version == 1)
{
throw new NotSupportedException("Version 1 POINT10 is no longer supported, use version 2.");
}
else if (items[i].version == 2)
{
writers_compressed[i] = new LASwriteItemCompressed_POINT10_v2(enc);
}
else
{
return(false);
}
break;
case LASitem.Type.GPSTIME11:
if (items[i].version == 1)
{
throw new NotSupportedException("Version 1 GPSTIME11 is no longer supported, use version 2.");
}
else if (items[i].version == 2)
{
writers_compressed[i] = new LASwriteItemCompressed_GPSTIME11_v2(enc);
}
else
{
return(false);
}
break;
case LASitem.Type.RGB12:
if (items[i].version == 1)
{
throw new NotSupportedException("Version 1 RGB12 is no longer supported, use version 2.");
}
else if (items[i].version == 2)
{
writers_compressed[i] = new LASwriteItemCompressed_RGB12_v2(enc);
}
else
{
return(false);
}
break;
case LASitem.Type.WAVEPACKET13:
if (items[i].version == 1)
{
writers_compressed[i] = new LASwriteItemCompressed_WAVEPACKET13_v1(enc);
}
else
{
return(false);
}
break;
case LASitem.Type.BYTE:
if (items[i].version == 1)
{
throw new NotSupportedException("Version 1 BYTE is no longer supported, use version 2.");
}
else if (items[i].version == 2)
{
writers_compressed[i] = new LASwriteItemCompressed_BYTE_v2(enc, items[i].size);
}
else
{
return(false);
}
break;
default: return(false);
}
}
if (laszip.compressor == LASzip.COMPRESSOR_POINTWISE_CHUNKED)
{
if (laszip.chunk_size != 0)
{
chunk_size = laszip.chunk_size;
}
chunk_count = 0;
init_chunking = true;
}
}
return(true);
}
