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/**
* @file llkdumem.h
* @brief Helper class for kdu memory management
*
* $LicenseInfo:firstyear=2010&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLKDUMEM_H
#define LL_LLKDUMEM_H
// Support classes for reading and writing from memory buffers in KDU
#include "kdu_image.h"
#include "kdu_elementary.h"
#include "kdu_messaging.h"
#include "kdu_params.h"
#include "kdu_compressed.h"
#include "kdu_sample_processing.h"
#include "image_local.h"
#include "stdtypes.h"
class LLKDUMemSource: public kdu_compressed_source
{
public: // Member functions
LLKDUMemSource(U8 *input_buffer, U32 size)
{
mData = input_buffer;
mSize = size;
mCurPos = 0;
}
~LLKDUMemSource()
{
}
int read(kdu_byte *buf, int num_bytes)
{
U32 num_out;
num_out = num_bytes;
if ((mSize - mCurPos) < (U32)num_bytes)
{
num_out = mSize -mCurPos;
}
memcpy(buf, mData + mCurPos, num_out);
mCurPos += num_out;
return num_out;
}
void reset()
{
mCurPos = 0;
}
private: // Data
U8 *mData;
U32 mSize;
U32 mCurPos;
};
class LLKDUMemTarget: public kdu_compressed_target
{
public: // Member functions
LLKDUMemTarget(U8 *output_buffer, U32 &output_size, const U32 buffer_size)
{
mData = output_buffer;
mSize = buffer_size;
mCurPos = 0;
mOutputSize = &output_size;
}
~LLKDUMemTarget()
{
}
bool write(const kdu_byte *buf, int num_bytes)
{
U32 num_out;
num_out = num_bytes;
if ((mSize - mCurPos) < (U32)num_bytes)
{
num_out = mSize - mCurPos;
memcpy(mData + mCurPos, buf, num_out);
return false;
}
memcpy(mData + mCurPos, buf, num_out);
mCurPos += num_out;
*mOutputSize = mCurPos;
return true;
}
private: // Data
U8 *mData;
U32 mSize;
U32 mCurPos;
U32 *mOutputSize;
};
class LLKDUMemIn : public kdu_image_in_base
{
public: // Member functions
LLKDUMemIn(const U8 *data,
const U32 size,
const U16 rows,
const U16 cols,
U8 in_num_components,
siz_params *siz);
~LLKDUMemIn();
bool get(int comp_idx, kdu_line_buf &line, int x_tnum);
private: // Data
const U8 *mData;
int first_comp_idx;
int num_components;
int rows, cols;
int alignment_bytes; // Number of 0's at end of each line.
int precision[3];
image_line_buf *incomplete_lines; // Each "sample" represents a full pixel
image_line_buf *free_lines;
int num_unread_rows;
U32 mCurPos;
U32 mDataSize;
};
#endif
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