1 /* $Id: runlength.h,v 1.1 2010/02/07 14:07:25 fredette Exp $ */ 2 3 /* tme/runlength.h - header file for run length: */ 4 5 /* 6 * Copyright (c) 2010 Matt Fredette 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Matt Fredette. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 25 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 32 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #ifndef _TME_RUNLENGTH_H 37 #define _TME_RUNLENGTH_H 38 39 #include <tme/common.h> 40 _TME_RCSID("$Id: runlength.h,v 1.1 2010/02/07 14:07:25 fredette Exp $"); 41 42 /* types: */ 43 44 /* a runlength value: */ 45 typedef tme_uint32_t tme_runlength_t; 46 47 /* the runlength state: */ 48 struct tme_runlength { 49 50 /* the runlength history count: */ 51 unsigned int tme_runlength_history_count; 52 53 /* the runlength history: */ 54 tme_runlength_t *_tme_runlength_history; 55 56 /* the next position in the runlength history: */ 57 unsigned int _tme_runlength_history_next; 58 59 /* the runlength history sum: */ 60 double _tme_runlength_history_sum; 61 62 /* the runlength cycles target: */ 63 double _tme_runlength_cycles_elapsed_target; 64 65 /* the start time of the run: */ 66 union tme_value64 tme_runlength_cycles_start; 67 68 /* the current runlength value: */ 69 tme_runlength_t tme_runlength_value; 70 }; 71 72 /* prototypes: */ 73 74 /* this initializes runlength state: */ 75 void tme_runlength_init _TME_P((struct tme_runlength *)); 76 77 /* this sets the runlength cycles target: */ 78 void tme_runlength_target_cycles _TME_P((struct tme_runlength *, union tme_value64)); 79 80 /* this updates the runlength: */ 81 void tme_runlength_update _TME_P((struct tme_runlength *)); 82 83 #endif /* !_TME_RUNLENGTH_H */ 84