147 lines
3.6 KiB
C++
147 lines
3.6 KiB
C++
/**
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* @file llkdumem.h
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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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#ifndef LL_LLKDUMEM_H
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#define LL_LLKDUMEM_H
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// Support classes for reading and writing from memory buffers in KDU
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#define kdu_xxxx "kdu_image.h"
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#include "include_kdu_xxxx.h"
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#include "kdu_elementary.h"
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#include "kdu_messaging.h"
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#include "kdu_params.h"
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#define kdu_xxxx "kdu_compressed.h"
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#include "include_kdu_xxxx.h"
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#include "kdu_sample_processing.h"
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#include "image_local.h"
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#include "stdtypes.h"
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class LLKDUMemSource: public kdu_core::kdu_compressed_source
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{
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public:
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LLKDUMemSource(U8 *input_buffer, U32 size)
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{
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mData = input_buffer;
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mSize = size;
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mCurPos = 0;
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}
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~LLKDUMemSource() = default;
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int read(kdu_core::kdu_byte *buf, int num_bytes)
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{
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U32 num_out;
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num_out = num_bytes;
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if ((mSize - mCurPos) < (U32)num_bytes)
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{
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num_out = mSize -mCurPos;
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}
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memcpy(buf, mData + mCurPos, num_out);
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mCurPos += num_out;
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return num_out;
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}
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void reset()
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{
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mCurPos = 0;
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}
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private:
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U8 *mData;
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U32 mSize;
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U32 mCurPos;
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};
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class LLKDUMemTarget: public kdu_core::kdu_compressed_target
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{
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public:
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LLKDUMemTarget(U8 *output_buffer, U32 &output_size, const U32 buffer_size)
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{
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mData = output_buffer;
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mSize = buffer_size;
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mCurPos = 0;
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mOutputSize = &output_size;
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}
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~LLKDUMemTarget() = default;
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bool write(const kdu_core::kdu_byte *buf, int num_bytes)
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{
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U32 num_out;
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num_out = num_bytes;
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if ((mSize - mCurPos) < (U32)num_bytes)
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{
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num_out = mSize - mCurPos;
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memcpy(mData + mCurPos, buf, num_out);
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return false;
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}
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memcpy(mData + mCurPos, buf, num_out);
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mCurPos += num_out;
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*mOutputSize = mCurPos;
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return true;
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}
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private:
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U8 *mData;
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U32 mSize;
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U32 mCurPos;
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U32 *mOutputSize;
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};
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class LLKDUMemIn : public kdu_supp::kdu_image_in_base
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{
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public:
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LLKDUMemIn(const U8 *data,
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const U32 size,
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const U16 rows,
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const U16 cols,
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U8 in_num_components,
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kdu_core::siz_params *siz);
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~LLKDUMemIn();
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bool get(int comp_idx, kdu_core::kdu_line_buf &line, int x_tnum);
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private:
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const U8 *mData;
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int first_comp_idx;
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int num_components;
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int rows, cols;
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int alignment_bytes; // Number of 0's at end of each line.
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int precision[3];
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kd_supp_image_local::image_line_buf *incomplete_lines; // Each "sample" represents a full pixel
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kd_supp_image_local::image_line_buf *free_lines;
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int num_unread_rows;
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U32 mCurPos;
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U32 mDataSize;
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};
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#endif
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