// 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 decoder (if requested)
dec = null;
if (laszip != null && laszip.compressor != 0)
{
switch (laszip.coder)
{
case LASzip.CODER_ARITHMETIC: dec = new ArithmeticDecoder(); break;
default: return(false); // entropy decoder not supported
}
}
// initizalize the readers
readers = null;
num_readers = num_items;
// disable chunking
chunk_size = uint.MaxValue;
// always create the raw readers
readers_raw = new LASreadItem[num_readers];
for (int i = 0; i < num_readers; i++)
{
switch (items[i].type)
{
case LASitem.Type.POINT10: readers_raw[i] = new LASreadItemRaw_POINT10(); break;
case LASitem.Type.GPSTIME11: readers_raw[i] = new LASreadItemRaw_GPSTIME11(); break;
case LASitem.Type.RGB12: readers_raw[i] = new LASreadItemRaw_RGB12(); break;
case LASitem.Type.WAVEPACKET13: readers_raw[i] = new LASreadItemRaw_WAVEPACKET13(); break;
case LASitem.Type.BYTE: readers_raw[i] = new LASreadItemRaw_BYTE(items[i].size); break;
case LASitem.Type.POINT14: readers_raw[i] = new LASreadItemRaw_POINT14(); break;
case LASitem.Type.RGBNIR14: readers_raw[i] = new LASreadItemRaw_RGBNIR14(); break;
default: return(false);
}
point_size += items[i].size;
}
if (dec != null)
{
readers_compressed = new LASreadItem[num_readers];
// seeks with compressed data need a seek point
for (int i = 0; i < num_readers; i++)
{
switch (items[i].type)
{
case LASitem.Type.POINT10:
if (items[i].version == 1)
{
readers_compressed[i] = new LASreadItemCompressed_POINT10_v1(dec);
}
else if (items[i].version == 2)
{
readers_compressed[i] = new LASreadItemCompressed_POINT10_v2(dec);
}
else
{
return(false);
}
break;
case LASitem.Type.GPSTIME11:
if (items[i].version == 1)
{
readers_compressed[i] = new LASreadItemCompressed_GPSTIME11_v1(dec);
}
else if (items[i].version == 2)
{
readers_compressed[i] = new LASreadItemCompressed_GPSTIME11_v2(dec);
}
else
{
return(false);
}
break;
case LASitem.Type.RGB12:
if (items[i].version == 1)
{
readers_compressed[i] = new LASreadItemCompressed_RGB12_v1(dec);
}
else if (items[i].version == 2)
{
readers_compressed[i] = new LASreadItemCompressed_RGB12_v2(dec);
}
else
{
return(false);
}
break;
case LASitem.Type.WAVEPACKET13:
if (items[i].version == 1)
{
readers_compressed[i] = new LASreadItemCompressed_WAVEPACKET13_v1(dec);
}
else
{
return(false);
}
break;
case LASitem.Type.BYTE:
seek_point.extra_bytes = new byte[items[i].size];
seek_point.num_extra_bytes = items[i].size;
if (items[i].version == 1)
{
readers_compressed[i] = new LASreadItemCompressed_BYTE_v1(dec, items[i].size);
}
else if (items[i].version == 2)
{
readers_compressed[i] = new LASreadItemCompressed_BYTE_v2(dec, 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;
}
number_chunks = uint.MaxValue;
}
}
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 decoder (if requested)
dec=null;
if(laszip!=null&&laszip.compressor!=0)
{
switch(laszip.coder)
{
case LASzip.CODER_ARITHMETIC: dec=new ArithmeticDecoder(); break;
default: return false; // entropy decoder not supported
}
}
// initizalize the readers
readers=null;
num_readers=num_items;
// disable chunking
chunk_size=uint.MaxValue;
// always create the raw readers
readers_raw=new LASreadItem[num_readers];
for(int i=0; i<num_readers; i++)
{
switch(items[i].type)
{
case LASitem.Type.POINT10: readers_raw[i]=new LASreadItemRaw_POINT10(); break;
case LASitem.Type.GPSTIME11: readers_raw[i]=new LASreadItemRaw_GPSTIME11(); break;
case LASitem.Type.RGB12: readers_raw[i]=new LASreadItemRaw_RGB12(); break;
case LASitem.Type.WAVEPACKET13: readers_raw[i]=new LASreadItemRaw_WAVEPACKET13(); break;
case LASitem.Type.BYTE: readers_raw[i]=new LASreadItemRaw_BYTE(items[i].size); break;
case LASitem.Type.POINT14: readers_raw[i]=new LASreadItemRaw_POINT14(); break;
case LASitem.Type.RGBNIR14: readers_raw[i]=new LASreadItemRaw_RGBNIR14(); break;
default: return false;
}
point_size+=items[i].size;
}
if(dec!=null)
{
readers_compressed=new LASreadItem[num_readers];
// seeks with compressed data need a seek point
for(int i=0; i<num_readers; i++)
{
switch(items[i].type)
{
case LASitem.Type.POINT10:
if(items[i].version==1) readers_compressed[i]=new LASreadItemCompressed_POINT10_v1(dec);
else if(items[i].version==2) readers_compressed[i]=new LASreadItemCompressed_POINT10_v2(dec);
else return false;
break;
case LASitem.Type.GPSTIME11:
if(items[i].version==1) readers_compressed[i]=new LASreadItemCompressed_GPSTIME11_v1(dec);
else if(items[i].version==2) readers_compressed[i]=new LASreadItemCompressed_GPSTIME11_v2(dec);
else return false;
break;
case LASitem.Type.RGB12:
if(items[i].version==1) readers_compressed[i]=new LASreadItemCompressed_RGB12_v1(dec);
else if(items[i].version==2) readers_compressed[i]=new LASreadItemCompressed_RGB12_v2(dec);
else return false;
break;
case LASitem.Type.WAVEPACKET13:
if(items[i].version==1) readers_compressed[i]=new LASreadItemCompressed_WAVEPACKET13_v1(dec);
else return false;
break;
case LASitem.Type.BYTE:
seek_point.extra_bytes=new byte[items[i].size];
seek_point.num_extra_bytes=items[i].size;
if(items[i].version==1) readers_compressed[i]=new LASreadItemCompressed_BYTE_v1(dec, items[i].size);
else if(items[i].version==2) readers_compressed[i]=new LASreadItemCompressed_BYTE_v2(dec, 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;
number_chunks=uint.MaxValue;
}
}
return true;
}