394 lines
9.1 KiB
C++
394 lines
9.1 KiB
C++
/**
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* @file llkdumem.cpp
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* @brief Helper class for kdu memory management
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*
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* $LicenseInfo:firstyear=2010&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#include "linden_common.h"
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#include "llkdumem.h"
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// Various image utility functions from kdu
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#include "llerror.h"
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#if defined(LL_WINDOWS)
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# pragma warning(disable: 4702) // unreachable code
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#endif
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LLKDUMemIn::LLKDUMemIn(const U8 *data,
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const U32 size,
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const U16 width,
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const U16 height,
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const U8 in_num_components,
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siz_params *siz)
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{
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U8 n;
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first_comp_idx = 0;
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rows = height;
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cols = width;
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num_components = in_num_components;
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alignment_bytes = 0;
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for (n=0; n<3; ++n)
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{
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precision[n] = 0;
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}
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for (n=0; n < num_components; ++n)
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{
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siz->set(Sdims,n,0,rows);
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siz->set(Sdims,n,1,cols);
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siz->set(Ssigned,n,0,false);
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siz->set(Sprecision,n,0,8);
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}
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incomplete_lines = NULL;
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free_lines = NULL;
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num_unread_rows = rows;
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mData = data;
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mDataSize = size;
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mCurPos = 0;
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}
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LLKDUMemIn::~LLKDUMemIn()
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{
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if ((num_unread_rows > 0) || (incomplete_lines != NULL))
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{ kdu_warning w;
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w << "Not all rows of image components "
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<< first_comp_idx << " through "
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<< first_comp_idx+num_components-1
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<< " were consumed!";
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}
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image_line_buf *tmp;
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while ((tmp=incomplete_lines) != NULL)
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{
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incomplete_lines = tmp->next;
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delete tmp;
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}
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while ((tmp=free_lines) != NULL)
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{
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free_lines = tmp->next;
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delete tmp;
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}
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}
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bool LLKDUMemIn::get(int comp_idx, kdu_line_buf &line, int x_tnum)
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{
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int idx = comp_idx - this->first_comp_idx;
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assert((idx >= 0) && (idx < num_components));
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x_tnum = x_tnum*num_components+idx;
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image_line_buf *scan, *prev=NULL;
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for (scan=incomplete_lines; scan != NULL; prev=scan, scan=scan->next)
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{
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assert(scan->next_x_tnum >= x_tnum);
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if (scan->next_x_tnum == x_tnum)
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{
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break;
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}
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}
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if (scan == NULL)
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{ // Need to read a new image line.
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assert(x_tnum == 0); // Must consume in very specific order.
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if (num_unread_rows == 0)
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{
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return false;
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}
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if ((scan = free_lines) == NULL)
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{
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scan = new image_line_buf(cols+3,num_components);
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}
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free_lines = scan->next;
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if (prev == NULL)
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{
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incomplete_lines = scan;
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}
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else
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{
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prev->next = scan;
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}
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// Copy from image buffer into scan.
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memcpy(scan->buf, mData+mCurPos, cols*num_components);
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mCurPos += cols*num_components;
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num_unread_rows--;
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scan->accessed_samples = 0;
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scan->next_x_tnum = 0;
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}
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assert((cols-scan->accessed_samples) >= line.get_width());
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int comp_offset = idx;
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kdu_byte *sp = scan->buf+num_components*scan->accessed_samples + comp_offset;
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int n=line.get_width();
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if (line.get_buf32() != NULL)
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{
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kdu_sample32 *dp = line.get_buf32();
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if (line.is_absolute())
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{ // 32-bit absolute integers
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for (; n > 0; n--, sp+=num_components, dp++)
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{
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dp->ival = ((kdu_int32)(*sp)) - 128;
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}
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}
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else
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{ // true 32-bit floats
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for (; n > 0; n--, sp+=num_components, dp++)
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{
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dp->fval = (((float)(*sp)) / 256.0F) - 0.5F;
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}
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}
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}
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else
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{
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kdu_sample16 *dp = line.get_buf16();
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if (line.is_absolute())
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{ // 16-bit absolute integers
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for (; n > 0; n--, sp+=num_components, dp++)
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{
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dp->ival = ((kdu_int16)(*sp)) - 128;
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}
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}
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else
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{ // 16-bit normalized representation.
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for (; n > 0; n--, sp+=num_components, dp++)
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{
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dp->ival = (((kdu_int16)(*sp)) - 128) << (KDU_FIX_POINT-8);
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}
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}
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}
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scan->next_x_tnum++;
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if (idx == (num_components-1))
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{
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scan->accessed_samples += line.get_width();
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}
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if (scan->accessed_samples == cols)
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{ // Send empty line to free list.
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assert(scan == incomplete_lines);
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incomplete_lines = scan->next;
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scan->next = free_lines;
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free_lines = scan;
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}
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return true;
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}
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/*
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LLKDUMemOut::LLKDUMemOut(U8 *data, siz_params *siz, U8 in_num_components)
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{
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int is_signed = 0;
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int n;
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// Allocate memory segment
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first_comp_idx = 0;
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if (!(siz->get(Scomponents,0,0,num_components) &&
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siz->get(Sdims,first_comp_idx,0,rows) &&
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siz->get(Sdims,first_comp_idx,1,cols) &&
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siz->get(Ssigned,first_comp_idx,0,is_signed)))
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{
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kdu_error e; e << "Attempting to create output image files before "
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"all information is available concerning the image component "
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"dimensions, bit-depth and signed/unsigned characteristics.";
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}
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num_components -= first_comp_idx;
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for (n=0; n < 3; n++)
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{
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precision[n] = 0;
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}
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for (n=0; n < num_components; n++)
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{
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int prec;
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if (!(siz->compare(Sdims,first_comp_idx+n,0,rows) &&
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siz->compare(Sdims,first_comp_idx+n,1,cols) &&
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siz->compare(Ssigned,first_comp_idx+n,0,is_signed)))
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{
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assert(n > 0);
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num_components = 1;
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break;
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}
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if (!siz->get(Sprecision,first_comp_idx+n,0,prec))
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{
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kdu_error e; e << "Attempting to create output image data before "
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"all information is available concerning the image component "
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"dimensions, bit-depth and signed/unsigned characteristics.";
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}
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llassert(n < 3);
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precision[n] = prec;
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}
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if (is_signed)
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{
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kdu_warning w;
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w << "Signed sample values will be written to the "
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"BMP file as unsigned 8-bit quantities, centered about 128.";
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}
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mCurPos = 0;
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mData = data;
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mDataSize = rows*cols*num_components;
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incomplete_lines = NULL;
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free_lines = NULL;
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num_unwritten_rows = rows;
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}
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LLKDUMemOut::~LLKDUMemOut()
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{
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if ((num_unwritten_rows > 0) || (incomplete_lines != NULL))
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{
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kdu_warning w;
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w << "Not all rows of image components "
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<< first_comp_idx << " through "
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<< first_comp_idx+num_components-1
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<< " were completed!";
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}
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image_line_buf *tmp;
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while ((tmp=incomplete_lines) != NULL)
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{
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incomplete_lines = tmp->next;
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delete tmp;
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}
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while ((tmp=free_lines) != NULL)
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{
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free_lines = tmp->next;
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delete tmp;
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}
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// Should either clean up or leave alone the data buffer...
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// cout << "Done Destroying" << endl;
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}
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void LLKDUMemOut::put(int comp_idx, kdu_line_buf &line, int x_tnum)
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{
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int idx = 0;
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idx = comp_idx - this->first_comp_idx;
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assert((idx >= 0) && (idx < num_components));
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x_tnum = x_tnum*num_components+idx;
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image_line_buf *scan, *prev=NULL;
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for (scan=incomplete_lines; scan != NULL; prev=scan, scan=scan->next)
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{
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assert(scan->next_x_tnum >= x_tnum);
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if (scan->next_x_tnum == x_tnum)
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{
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break;
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}
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}
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if (scan == NULL)
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{ // Need to open a new line buffer
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assert(x_tnum == 0); // Must consume in very specific order.
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if ((scan = free_lines) == NULL)
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{
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scan = new image_line_buf(cols+3,num_components);
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}
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free_lines = scan->next;
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if (prev == NULL)
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{
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incomplete_lines = scan;
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}
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else
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{
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prev->next = scan;
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}
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scan->accessed_samples = 0;
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scan->next_x_tnum = 0;
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}
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assert((cols-scan->accessed_samples) >= line.get_width());
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int comp_offset = idx;
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if (line.get_buf32() != NULL)
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{
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if (line.is_absolute())
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{
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convert_ints_to_bytes(line.get_buf32(),
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scan->buf+num_components*scan->accessed_samples+comp_offset,
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line.get_width(),precision[idx],num_components);
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}
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else
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{
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convert_floats_to_bytes(line.get_buf32(),
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scan->buf+num_components*scan->accessed_samples+comp_offset,
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line.get_width(),precision[idx],num_components);
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}
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}
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else
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{
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if (line.is_absolute())
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{
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convert_shorts_to_bytes(line.get_buf16(),
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scan->buf+num_components*scan->accessed_samples+comp_offset,
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line.get_width(),precision[idx],num_components);
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}
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else
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{
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convert_fixpoint_to_bytes(line.get_buf16(),
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scan->buf+num_components*scan->accessed_samples+comp_offset,
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line.get_width(),precision[idx],num_components);
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}
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}
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scan->next_x_tnum++;
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if (idx == (num_components-1))
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{
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scan->accessed_samples += line.get_width();
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}
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if (scan->accessed_samples == cols)
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{
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// Write completed line and send it to the free list.
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if (num_unwritten_rows == 0)
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{
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kdu_error e; e << "Attempting to write too many lines to image "
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"file for components " << first_comp_idx << " through "
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<< first_comp_idx+num_components-1 << ".";
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}
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if ((mCurPos + cols*num_components) > mDataSize)
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{
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llerrs << "LLKDUMemOut::put() too much data" << llendl;
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}
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// Write the data to the output buffer.
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memcpy(mData+mCurPos, scan->buf, cols*num_components);
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mCurPos += cols*num_components;
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num_unwritten_rows--;
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assert(scan == incomplete_lines);
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incomplete_lines = scan->next;
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scan->next = free_lines;
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free_lines = scan;
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}
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}
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*/
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