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Filename : delta.h

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/**
 * \file        lzma/delta.h
 * \brief       Delta filter
 */

/*
 * Author: Lasse Collin
 *
 * This file has been put into the public domain.
 * You can do whatever you want with this file.
 *
 * See ../lzma.h for information about liblzma as a whole.
 */

#ifndef LZMA_H_INTERNAL
#	error Never include this file directly. Use <lzma.h> instead.
#endif


/**
 * \brief       Filter ID
 *
 * Filter ID of the Delta filter. This is used as lzma_filter.id.
 */
#define LZMA_FILTER_DELTA       LZMA_VLI_C(0x03)


/**
 * \brief       Type of the delta calculation
 *
 * Currently only byte-wise delta is supported. Other possible types could
 * be, for example, delta of 16/32/64-bit little/big endian integers, but
 * these are not currently planned since byte-wise delta is almost as good.
 */
typedef enum {
	LZMA_DELTA_TYPE_BYTE
} lzma_delta_type;


/**
 * \brief       Options for the Delta filter
 *
 * These options are needed by both encoder and decoder.
 */
typedef struct {
	/** For now, this must always be LZMA_DELTA_TYPE_BYTE. */
	lzma_delta_type type;

	/**
	 * \brief       Delta distance
	 *
	 * With the only currently supported type, LZMA_DELTA_TYPE_BYTE,
	 * the distance is as bytes.
	 *
	 * Examples:
	 *  - 16-bit stereo audio: distance = 4 bytes
	 *  - 24-bit RGB image data: distance = 3 bytes
	 */
	uint32_t dist;
#	define LZMA_DELTA_DIST_MIN 1
#	define LZMA_DELTA_DIST_MAX 256

	/*
	 * Reserved space to allow possible future extensions without
	 * breaking the ABI. You should not touch these, because the names
	 * of these variables may change. These are and will never be used
	 * when type is LZMA_DELTA_TYPE_BYTE, so it is safe to leave these
	 * uninitialized.
	 */
	uint32_t reserved_int1;
	uint32_t reserved_int2;
	uint32_t reserved_int3;
	uint32_t reserved_int4;
	void *reserved_ptr1;
	void *reserved_ptr2;

} lzma_options_delta;

Name	Size	Last Modified	Owner	Permissions
base.h	24.275 KB	April 29 2018 3:10:38	root	0644
bcj.h	2.568 KB	April 29 2018 3:10:38	root	0644
block.h	21.588 KB	April 29 2018 3:10:38	root	0644
check.h	4.155 KB	April 29 2018 3:10:38	root	0644
container.h	24.262 KB	April 29 2018 3:10:38	root	0644
delta.h	1.821 KB	April 29 2018 3:10:38	root	0644
filter.h	16.044 KB	April 29 2018 3:10:38	root	0644
hardware.h	2.544 KB	April 29 2018 3:10:38	root	0644
index.h	22.94 KB	April 29 2018 3:10:38	root	0644
index_hash.h	3.822 KB	April 29 2018 3:10:38	root	0644
lzma12.h	14.397 KB	April 29 2018 3:10:38	root	0644
stream_flags.h	8.06 KB	April 29 2018 3:10:38	root	0644
version.h	3.415 KB	April 29 2018 3:16:13	root	0644
vli.h	6.394 KB	April 29 2018 3:10:38	root	0644

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