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/*
 * Copyright (c) 2013 Genome Research Ltd.
 * Author(s): James Bonfield
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 *    1. Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 * 
 *    2. Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 * 
 *    3. Neither the names Genome Research Ltd and Wellcome Trust Sanger
 *    Institute nor the names of its contributors may be used to endorse
 *    or promote products derived from this software without specific
 *    prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY GENOME RESEARCH LTD AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENOME RESEARCH
 * LTD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Author: James Bonfield, Wellcome Trust Sanger Institute. 2013
 */

#ifndef _CRAM_STATS_H_
#define _CRAM_STATS_H_

#ifdef __cplusplus
extern "C" {
#endif

#include "io_lib/hash_table.h"

cram_stats *cram_stats_create(void);
void cram_stats_add(cram_stats *st, int32_t val);
void cram_stats_del(cram_stats *st, int32_t val);
void cram_stats_dump(cram_stats *st);
void cram_stats_free(cram_stats *st);

/*
 * Computes entropy from integer frequencies for various encoding methods and
 * picks the best encoding.
 *
 * FIXME: we could reuse some of the code here for the actual encoding
 * parameters too. Eg the best 'k' for SUBEXP or the code lengths for huffman.
 *
 * Returns the best codec to use.
 */
enum cram_encoding cram_stats_encoding(cram_fd *fd, cram_stats *st);

#ifdef __cplusplus
}
#endif

#endif