50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
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/**
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* \file lzma/delta.h
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* \brief Delta filter
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*
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* \author Copyright (C) 1999-2006 Igor Pavlov
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* \author Copyright (C) 2007 Lasse Collin
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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; either
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* version 2.1 of the License, or (at your option) any later version.
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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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#ifndef LZMA_H_INTERNAL
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# error Never include this file directly. Use <lzma.h> instead.
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#endif
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/**
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* \brief Filter ID
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*
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* Filter ID of the Delta filter. This is used as lzma_options_filter.id.
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*/
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#define LZMA_FILTER_DELTA LZMA_VLI_C(0x20)
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/**
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* \brief Options for the Delta filter
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*
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* These options are needed by both encoder and decoder.
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*/
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typedef struct {
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/**
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* \brief Delta distance as bytes
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*
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* Examples:
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* - 16-bit stereo audio: distance = 4 bytes
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* - 24-bit RGB image data: distance = 3 bytes
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*/
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uint32_t distance;
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# define LZMA_DELTA_DISTANCE_MIN 1
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# define LZMA_DELTA_DISTANCE_MAX 256
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} lzma_options_delta;
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