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84 lines
2.9 KiB
C
84 lines
2.9 KiB
C
/* $Id: runlength.h,v 1.1 2010/02/07 14:07:25 fredette Exp $ */
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/* tme/runlength.h - header file for run length: */
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/*
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* Copyright (c) 2010 Matt Fredette
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Matt Fredette.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TME_RUNLENGTH_H
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#define _TME_RUNLENGTH_H
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#include <tme/common.h>
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_TME_RCSID("$Id: runlength.h,v 1.1 2010/02/07 14:07:25 fredette Exp $");
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/* types: */
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/* a runlength value: */
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typedef tme_uint32_t tme_runlength_t;
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/* the runlength state: */
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struct tme_runlength {
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/* the runlength history count: */
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unsigned int tme_runlength_history_count;
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/* the runlength history: */
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tme_runlength_t *_tme_runlength_history;
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/* the next position in the runlength history: */
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unsigned int _tme_runlength_history_next;
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/* the runlength history sum: */
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double _tme_runlength_history_sum;
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/* the runlength cycles target: */
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double _tme_runlength_cycles_elapsed_target;
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/* the start time of the run: */
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union tme_value64 tme_runlength_cycles_start;
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/* the current runlength value: */
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tme_runlength_t tme_runlength_value;
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};
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/* prototypes: */
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/* this initializes runlength state: */
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void tme_runlength_init _TME_P((struct tme_runlength *));
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/* this sets the runlength cycles target: */
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void tme_runlength_target_cycles _TME_P((struct tme_runlength *, union tme_value64));
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/* this updates the runlength: */
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void tme_runlength_update _TME_P((struct tme_runlength *));
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#endif /* !_TME_RUNLENGTH_H */
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