jitterbuf.c

/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2004-2005, Horizon Wimba, Inc.
 *
 * Contributors:
 * Steve Kann <stevek@stevek.com>
 *
 * A license has been granted to Digium (via disclaimer) for the use of
 * this code.
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief jitterbuf: an application-independent jitterbuffer
 * \author Steve Kann <stevek@stevek.com>
 *
 */

#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision$")

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>

#include "jitterbuf.h"
#include "asterisk/utils.h"

/*! define these here, just for ancient compiler systems */
#define JB_LONGMAX 2147483647L
#define JB_LONGMIN (-JB_LONGMAX - 1L)

#define jb_warn(...) (warnf ? warnf(__VA_ARGS__) : (void)0)
#define jb_err(...) (errf ? errf(__VA_ARGS__) : (void)0)
#define jb_dbg(...) (dbgf ? dbgf(__VA_ARGS__) : (void)0)

#ifdef DEEP_DEBUG
#define jb_dbg2(...) (dbgf ? dbgf(__VA_ARGS__) : (void)0)
#else
#define jb_dbg2(...) ((void)0)
#endif

static jb_output_function_t warnf, errf, dbgf;

void jb_setoutput(jb_output_function_t err, jb_output_function_t warn, jb_output_function_t dbg) 
{
	errf = err;
	warnf = warn;
	dbgf = dbg;
}

static void increment_losspct(jitterbuf *jb) 
{
	jb->info.losspct = (100000 + 499 * jb->info.losspct)/500;    
}

static void decrement_losspct(jitterbuf *jb)