crdef.h

sloedgy open sip stack source code

/* crdef.h      (c) 1999-2000 Derek J Smithies ([e-mail])
 *                           Indranet Technologies ltd ([e-mail])
 *
 * This file is derived from vic, http://www-nrg.ee.lbl.gov/vic/
 * Their copyright notice is below.
 */
/*
 * Copyright (c) 1993-1994 Regents of the University of California.
 * All rights reserved.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and the Network Research Group at
 *      Lawrence Berkeley Laboratory.
 * 4. Neither the name of the University nor of the Laboratory may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 THE REGENTS 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.
 *
 */

/*
 * The bit definitions for the values stored in the conditional
 * replenishment vector.  We use a variant of the algorithm used
 * in nv (which is very similar to the algorithms in many hardware
 * codecs) where we only send a block if it changes beyond some threshold
 * due to scene motion.  In this case, we send it at a "low-quality"
 * to trade of quality for frame rate in areas of high motion.
 * We then age the block and after it hasn't changed for a few frames
 * we send a higher quality version.  Finally, the process that scans
 * the background filling in blocks sends the highest quality version.
 *
 * A finite state machine defines the algorithm.  When motion is detected,
 * the block is reset to state MOTION.  On no motion, it is aged to AGE1,
 * AGE2, ... etc., until it reaches state AGEn (the age threshold), and
 * then it transitions to IDLE.  If the background process finds a block
 * in the IDLE state, it can promote it to the BG state.  On the next
 * frame, it reverts to the IDLE state.
 *
 * Blocks are transmitted only in the MOTION, AGEn, and BG state,
 * at low, medium, and high quality, respectively.  The high bit
 * is reserved to indicate the block is in one of these states
 * and should be sent.
 */

/************ Change log
 *
 * $Log: crdef.h,v $
 * Revision 1.1  2006/06/26 03:03:16  joegenbaclor
 * I have decided to include the latest development realease  of OPAL tagged Deimos Devel 1 (June 8 2006) as inegrated classes to opensipstack to avoid future version conflicts due to the fast pace in OPAL development.   This move is also aimed to reduce the size of projects using OPAL componets such as the soon to be relased OpenSIPPhone.
 *
 * Revision 2.1  2003/03/15 23:42:59  robertj
 * Update to OpenH323 v1.11.7
 *
 * Revision 1.3  2003/03/14 07:25:55  robertj
 * Removed $header keyword so is not different on alternate repositories
 *
 * Revision 1.2  2000/08/25 03:18:49  dereks
 * Add change log facility (Thanks Robert for the info on implementation)
 *
 *
 *
 ********/



#define CR_MOTION	0
#define CR_AGETHRESH	31
#define CR_IDLE		0x40
#define CR_BG		0x41
#define CR_SEND		0x80
#define CR_STATE(s)	((s) & 0x7f)