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3b34851de1
broken. API has changed a lot and it will still change a little more here and there. The command line tool doesn't have all the required changes to reflect the API changes, so it's easy to get "internal error" or trigger assertions.
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/**
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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_filter.id.
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*/
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#define LZMA_FILTER_DELTA LZMA_VLI_C(0x03)
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/**
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* \brief Type of the delta calculation
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*
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* Currently only byte-wise delta is supported. Other possible types could
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* be, for example, delta of 16/32/64-bit little/big endian integers, but
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* these are not currently planned since byte-wise delta is almost as good.
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*/
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typedef enum {
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LZMA_DELTA_TYPE_BYTE
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} lzma_delta_type;
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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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/** For now, this must always be LZMA_DELTA_TYPE_BYTE. */
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lzma_delta_type type;
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/**
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* \brief Delta distance
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*
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* With the only currently supported type, LZMA_DELTA_TYPE_BYTE,
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* the distance is 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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/**
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* \brief Reserved space for possible future extensions
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*
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* You should not touch these, because the names of these variables
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* may change. These are and will never be used when type is
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* LZMA_DELTA_TYPE_BYTE, so it is safe to leave these uninitialized.
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*/
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uint32_t reserved_int1;
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uint32_t reserved_int2;
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void *reserved_ptr1;
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void *reserved_ptr2;
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} lzma_options_delta;
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