--- /dev/null
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+// By downloading, copying, installing or using the software you agree to this license.
+// If you do not agree to this license, do not download, install,
+// copy or use the software.
+//
+//
+// License Agreement
+// For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+// * Redistribution's of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// * Redistribution's 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.
+//
+// * The name of the copyright holders may not 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 Intel Corporation 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.
+//
+//M*/
+
+#include "_highgui.h"
+#include "bitstrm.h"
+
+namespace cv
+{
+
+const int BS_DEF_BLOCK_SIZE = 1<<15;
+
+bool bsIsBigEndian( void )
+{
+ return (((const int*)"\0\x1\x2\x3\x4\x5\x6\x7")[0] & 255) != 0;
+}
+
+///////////////////////// RBaseStream ////////////////////////////
+
+bool RBaseStream::isOpened()
+{
+ return m_is_opened;
+}
+
+void RBaseStream::allocate()
+{
+ if( !m_allocated )
+ {
+ m_start = new uchar[m_block_size];
+ m_end = m_start + m_block_size;
+ m_current = m_end;
+ m_allocated = true;
+ }
+}
+
+
+RBaseStream::RBaseStream()
+{
+ m_start = m_end = m_current = 0;
+ m_file = 0;
+ m_block_size = BS_DEF_BLOCK_SIZE;
+ m_is_opened = false;
+ m_allocated = false;
+}
+
+
+RBaseStream::~RBaseStream()
+{
+ close(); // Close files
+ release(); // free buffers
+}
+
+
+void RBaseStream::readBlock()
+{
+ setPos( getPos() ); // normalize position
+
+ if( m_file == 0 )
+ {
+ if( m_block_pos == 0 && m_current < m_end )
+ return;
+ throw RBS_THROW_EOS;
+ }
+
+ fseek( m_file, m_block_pos, SEEK_SET );
+ size_t readed = fread( m_start, 1, m_block_size, m_file );
+ m_end = m_start + readed;
+ m_current = m_start;
+
+ if( readed == 0 || m_current >= m_end )
+ throw RBS_THROW_EOS;
+}
+
+
+bool RBaseStream::open( const string& filename )
+{
+ close();
+ allocate();
+
+ m_file = fopen( filename.c_str(), "rb" );
+ if( m_file )
+ {
+ m_is_opened = true;
+ setPos(0);
+ readBlock();
+ }
+ return m_file != 0;
+}
+
+bool RBaseStream::open( const Mat& buf )
+{
+ close();
+ if( buf.empty() )
+ return false;
+ CV_Assert(buf.isContinuous());
+ m_start = buf.data;
+ m_end = m_start + buf.cols*buf.rows*buf.elemSize();
+ m_allocated = false;
+ m_is_opened = true;
+ setPos(0);
+
+ return true;
+}
+
+void RBaseStream::close()
+{
+ if( m_file )
+ {
+ fclose( m_file );
+ m_file = 0;
+ }
+ m_is_opened = false;
+ if( !m_allocated )
+ m_start = m_end = m_current = 0;
+}
+
+
+void RBaseStream::release()
+{
+ if( m_allocated )
+ delete[] m_start;
+ m_start = m_end = m_current = 0;
+ m_allocated = false;
+}
+
+
+void RBaseStream::setPos( int pos )
+{
+ assert( isOpened() && pos >= 0 );
+
+ if( !m_file )
+ {
+ m_current = m_start + pos;
+ m_block_pos = 0;
+ return;
+ }
+
+ int offset = pos % m_block_size;
+ m_block_pos = pos - offset;
+ m_current = m_start + offset;
+}
+
+
+int RBaseStream::getPos()
+{
+ assert( isOpened() );
+ return m_block_pos + (int)(m_current - m_start);
+}
+
+void RBaseStream::skip( int bytes )
+{
+ assert( bytes >= 0 );
+ m_current += bytes;
+}
+
+///////////////////////// RLByteStream ////////////////////////////
+
+RLByteStream::~RLByteStream()
+{
+}
+
+int RLByteStream::getByte()
+{
+ uchar *current = m_current;
+ int val;
+
+ if( current >= m_end )
+ {
+ readBlock();
+ current = m_current;
+ }
+
+ val = *((uchar*)current);
+ m_current = current + 1;
+ return val;
+}
+
+
+int RLByteStream::getBytes( void* buffer, int count )
+{
+ uchar* data = (uchar*)buffer;
+ int readed = 0;
+ assert( count >= 0 );
+
+ while( count > 0 )
+ {
+ int l;
+
+ for(;;)
+ {
+ l = (int)(m_end - m_current);
+ if( l > count ) l = count;
+ if( l > 0 ) break;
+ readBlock();
+ }
+ memcpy( data, m_current, l );
+ m_current += l;
+ data += l;
+ count -= l;
+ readed += l;
+ }
+ return readed;
+}
+
+
+//////////// RLByteStream & RMByteStream <Get[d]word>s ////////////////
+
+RMByteStream::~RMByteStream()
+{
+}
+
+
+int RLByteStream::getWord()
+{
+ uchar *current = m_current;
+ int val;
+
+ if( current+1 < m_end )
+ {
+ val = current[0] + (current[1] << 8);
+ m_current = current + 2;
+ }
+ else
+ {
+ val = getByte();
+ val|= getByte() << 8;
+ }
+ return val;
+}
+
+
+int RLByteStream::getDWord()
+{
+ uchar *current = m_current;
+ int val;
+
+ if( current+3 < m_end )
+ {
+ val = current[0] + (current[1] << 8) +
+ (current[2] << 16) + (current[3] << 24);
+ m_current = current + 4;
+ }
+ else
+ {
+ val = getByte();
+ val |= getByte() << 8;
+ val |= getByte() << 16;
+ val |= getByte() << 24;
+ }
+ return val;
+}
+
+
+int RMByteStream::getWord()
+{
+ uchar *current = m_current;
+ int val;
+
+ if( current+1 < m_end )
+ {
+ val = (current[0] << 8) + current[1];
+ m_current = current + 2;
+ }
+ else
+ {
+ val = getByte() << 8;
+ val|= getByte();
+ }
+ return val;
+}
+
+
+int RMByteStream::getDWord()
+{
+ uchar *current = m_current;
+ int val;
+
+ if( current+3 < m_end )
+ {
+ val = (current[0] << 24) + (current[1] << 16) +
+ (current[2] << 8) + current[3];
+ m_current = current + 4;
+ }
+ else
+ {
+ val = getByte() << 24;
+ val |= getByte() << 16;
+ val |= getByte() << 8;
+ val |= getByte();
+ }
+ return val;
+}
+
+/////////////////////////// WBaseStream /////////////////////////////////
+
+// WBaseStream - base class for output streams
+WBaseStream::WBaseStream()
+{
+ m_start = m_end = m_current = 0;
+ m_file = 0;
+ m_block_size = BS_DEF_BLOCK_SIZE;
+ m_is_opened = false;
+ m_buf = 0;
+}
+
+
+WBaseStream::~WBaseStream()
+{
+ close();
+ release();
+}
+
+
+bool WBaseStream::isOpened()
+{
+ return m_is_opened;
+}
+
+
+void WBaseStream::allocate()
+{
+ if( !m_start )
+ m_start = new uchar[m_block_size];
+
+ m_end = m_start + m_block_size;
+ m_current = m_start;
+}
+
+
+void WBaseStream::writeBlock()
+{
+ int size = (int)(m_current - m_start);
+
+ assert( isOpened() );
+ if( size == 0 )
+ return;
+
+ if( m_buf )
+ {
+ size_t sz = m_buf->size();
+ m_buf->resize( sz + size );
+ memcpy( &(*m_buf)[sz], m_start, size );
+ }
+ else
+ {
+ fwrite( m_start, 1, size, m_file );
+ }
+ m_current = m_start;
+ m_block_pos += size;
+}
+
+
+bool WBaseStream::open( const string& filename )
+{
+ close();
+ allocate();
+
+ m_file = fopen( filename.c_str(), "wb" );
+ if( m_file )
+ {
+ m_is_opened = true;
+ m_block_pos = 0;
+ m_current = m_start;
+ }
+ return m_file != 0;
+}
+
+bool WBaseStream::open( vector<uchar>& buf )
+{
+ close();
+ allocate();
+
+ m_buf = &buf;
+ m_is_opened = true;
+ m_block_pos = 0;
+ m_current = m_start;
+
+ return true;
+}
+
+void WBaseStream::close()
+{
+ if( m_is_opened )
+ writeBlock();
+ if( m_file )
+ {
+ fclose( m_file );
+ m_file = 0;
+ }
+ m_buf = 0;
+ m_is_opened = false;
+}
+
+
+void WBaseStream::release()
+{
+ if( m_start )
+ delete[] m_start;
+ m_start = m_end = m_current = 0;
+}
+
+
+int WBaseStream::getPos()
+{
+ assert( isOpened() );
+ return m_block_pos + (int)(m_current - m_start);
+}
+
+
+///////////////////////////// WLByteStream ///////////////////////////////////
+
+WLByteStream::~WLByteStream()
+{
+}
+
+void WLByteStream::putByte( int val )
+{
+ *m_current++ = (uchar)val;
+ if( m_current >= m_end )
+ writeBlock();
+}
+
+
+void WLByteStream::putBytes( const void* buffer, int count )
+{
+ uchar* data = (uchar*)buffer;
+
+ assert( data && m_current && count >= 0 );
+
+ while( count )
+ {
+ int l = (int)(m_end - m_current);
+
+ if( l > count )
+ l = count;
+
+ if( l > 0 )
+ {
+ memcpy( m_current, data, l );
+ m_current += l;
+ data += l;
+ count -= l;
+ }
+ if( m_current == m_end )
+ writeBlock();
+ }
+}
+
+
+void WLByteStream::putWord( int val )
+{
+ uchar *current = m_current;
+
+ if( current+1 < m_end )
+ {
+ current[0] = (uchar)val;
+ current[1] = (uchar)(val >> 8);
+ m_current = current + 2;
+ if( m_current == m_end )
+ writeBlock();
+ }
+ else
+ {
+ putByte(val);
+ putByte(val >> 8);
+ }
+}
+
+
+void WLByteStream::putDWord( int val )
+{
+ uchar *current = m_current;
+
+ if( current+3 < m_end )
+ {
+ current[0] = (uchar)val;
+ current[1] = (uchar)(val >> 8);
+ current[2] = (uchar)(val >> 16);
+ current[3] = (uchar)(val >> 24);
+ m_current = current + 4;
+ if( m_current == m_end )
+ writeBlock();
+ }
+ else
+ {
+ putByte(val);
+ putByte(val >> 8);
+ putByte(val >> 16);
+ putByte(val >> 24);
+ }
+}
+
+
+///////////////////////////// WMByteStream ///////////////////////////////////
+
+WMByteStream::~WMByteStream()
+{
+}
+
+
+void WMByteStream::putWord( int val )
+{
+ uchar *current = m_current;
+
+ if( current+1 < m_end )
+ {
+ current[0] = (uchar)(val >> 8);
+ current[1] = (uchar)val;
+ m_current = current + 2;
+ if( m_current == m_end )
+ writeBlock();
+ }
+ else
+ {
+ putByte(val >> 8);
+ putByte(val);
+ }
+}
+
+
+void WMByteStream::putDWord( int val )
+{
+ uchar *current = m_current;
+
+ if( current+3 < m_end )
+ {
+ current[0] = (uchar)(val >> 24);
+ current[1] = (uchar)(val >> 16);
+ current[2] = (uchar)(val >> 8);
+ current[3] = (uchar)val;
+ m_current = current + 4;
+ if( m_current == m_end )
+ writeBlock();
+ }
+ else
+ {
+ putByte(val >> 24);
+ putByte(val >> 16);
+ putByte(val >> 8);
+ putByte(val);
+ }
+}
+
+}
projects / opencv / blobdiff