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57 lines
1.3 KiB
57 lines
1.3 KiB
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* erofs-utils/lib/compressor.h
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*
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* Copyright (C) 2018-2019 HUAWEI, Inc.
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* http://www.huawei.com/
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* Created by Gao Xiang <gaoxiang25@huawei.com>
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*/
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#ifndef __EROFS_LIB_COMPRESSOR_H
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#define __EROFS_LIB_COMPRESSOR_H
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#include "erofs/defs.h"
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struct erofs_compress;
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struct erofs_compressor {
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const char *name;
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int default_level;
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int best_level;
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int (*init)(struct erofs_compress *c);
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int (*exit)(struct erofs_compress *c);
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int (*compress_destsize)(struct erofs_compress *c,
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int compress_level,
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void *src, unsigned int *srcsize,
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void *dst, unsigned int dstsize);
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};
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struct erofs_compress {
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struct erofs_compressor *alg;
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unsigned int compress_threshold;
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/* *_destsize specific */
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unsigned int destsize_alignsize;
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unsigned int destsize_redzone_begin;
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unsigned int destsize_redzone_end;
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void *private_data;
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};
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/* list of compression algorithms */
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extern struct erofs_compressor erofs_compressor_lz4;
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extern struct erofs_compressor erofs_compressor_lz4hc;
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int erofs_compress_destsize(struct erofs_compress *c, int compression_level,
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void *src, unsigned int *srcsize,
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void *dst, unsigned int dstsize);
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int erofs_compressor_init(struct erofs_compress *c, char *alg_name);
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int erofs_compressor_exit(struct erofs_compress *c);
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#endif
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