/*
 * This file is a part of Pcompress, a chunked parallel multi-
 * algorithm lossless compression and decompression program.
 *
 * Copyright (C) 2012-2013 Moinak Ghosh. All rights reserved.
 * Use is subject to license terms.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program.
 * If not, see <http://www.gnu.org/licenses/>.
 *
 * moinakg@belenix.org, http://moinakg.wordpress.com/
 *
 */

#ifndef	_PC_ARCHIVE_FILTER_H
#define	_PC_ARCHIVE_FILTER_H

#include <sys/types.h>
#include <sys/stat.h>
#include <inttypes.h>
#include <unistd.h>
#include <archive.h>
#include <archive_entry.h>

#ifdef	__cplusplus
extern "C" {
#endif

#define	FILTER_RETURN_SKIP	(1)
#define	FILTER_RETURN_ERROR	(-1)
#define	FILTER_RETURN_SOFT_ERROR	(-2)
#define FILTER_XATTR_ENTRY  "_._pc_filter_xattr"

#define	FILTER_OUTPUT_MEM	1
#define	FILTER_OUTPUT_FILE	2

#define HELPER_DEF_BUFSIZ       (512 * 1024)
#define WVPK_FILE_SIZE_LIMIT    (18 * 1024 * 1024)

/*
 * The biggest scratch buffer reqd by filter routines.
 * Currently this is the WavPack filter buffer.
 */
#define	FILTER_SCRATCH_SIZE_MAX	WVPK_FILE_SIZE_LIMIT

#ifndef _MPLV2_LICENSE_
#	define  PJG_FILE_SIZE_LIMIT     (8 * 1024 * 1024)
#	define  PJG_APPVERSION1         (25)
#	define  PJG_APPVERSION2         (25)
#endif

#pragma	pack(1)
typedef struct _filter_std_hdr {
	uint64_t in_size;
} filter_std_hdr_t;
#pragma	pack()

typedef struct _filter_output {
	int output_type;
	uint8_t *out;
	size_t out_size;
	int out_fd;
	filter_std_hdr_t hdr;
} filter_output_t;

struct filter_info {
	struct archive *source_arc;
	struct archive *target_arc;
	struct archive_entry *entry;
	int fd;
	int compressing, block_size;
	int *type_ptr;
	int cmp_level;
	filter_output_t *fout;
	uchar_t scratch_buffer;
	size_t scratch_buffer_size;
};

struct filter_flags {
	int enable_packjpg;
	int enable_wavpack;
};

typedef ssize_t (*filter_func_ptr)(struct filter_info *fi, void *filter_private);

struct type_data {
	void *filter_private;
	filter_func_ptr filter_func;
	char *filter_name;
};

void add_filters_by_type(struct type_data *typetab, struct filter_flags *ff);
int  type_tag_from_filter_name(struct type_data *typetab, const char *fname,
    size_t len);

#ifdef	__cplusplus
}
#endif

#endif