intercom.h

Intercom 是一个 Unix系统上灵活的语音传输软件。支持标准音频压缩比如GSM, G.711, and G.72x和其他音频编码。Intercom专为高速网络设计来传输高品质的语音

/*  intercom.h -- Prototypes and declarations for intercom.c
    Copyright (C) 2001-2003  Shane Wegner
    This file is part of Intercom.

    Intercom is free software; you can redistribute it and/or modify it
    under the terms of version 2 of the GNU General Public License as
    published by the Free Software Foundation.

    Intercom is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.

    You should have received a copy of version 2 of the GNU General Public
    License along with Intercom; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

    To contact the author, please send email to [e-mail].
    */

/* $Id: intercom.h,v 1.26 2003/02/13 20:22:49 shane Exp $ */

#ifndef INTERCOM_H
#define INTERCOM_H

#include <time.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>

#include "protocol.h"
#include "iobuff.h"
#include "gain.h"

struct call_info {
int state;
int csock; /* controler (tcp) socket */
int dsock; /* data socket (udp) */
uint16_t rcv_dport;
int loopback;
int rdsp;
int rdsp_blksize;
char *rdsp_buff;
int pdsp;
int pdsp_blksize;
char *pdsp_buff;
uint32_t snd_sequence;
uint32_t rcv_sequence;
int snd_datasize; /* Size of a frame of audio data.  Packets must be on this boundary */
struct gain *ogain;
struct gain *igain;
#ifdef USE_CRYPTO
struct cryptinfo cryptinfo;
#endif
struct {
time_t start_time; /* Time when call was answered */
uint32_t cpkts_sent; /* Control packets sent */
uint32_t cpkts_recv; /* Control packets received */
uint32_t cbytes_sent;
uint32_t cbytes_recv;
uint32_t apkts_sent; /* Audio packets sent */
uint32_t apkts_recv; /* Audio packets received */
uint32_t abytes_sent;
uint32_t abytes_recv;
uint32_t apkts_lost; /* Count of missing audio packets received */
uint32_t apkts_order; /* Audio packets received out of sequence */
} connstats;
struct audio_params snd_aparams;
struct audio_params rcv_aparams;
struct sockaddr_in r_address;
struct hostent *r_hostent;
struct pkt_hello r_hellopkt;
struct iobuff cssq;
struct iobuff csrq;
struct iobuff rdspq;
struct iobuff pdspq;
};

/* Bit mannipulation macros. */
#define BIT(n) (1<<n)
#define SET_BIT(m, n) (m |= n)
#define CLEAR_BIT(m, n) (m &= ~(n))
#define TEST_BIT(m, n) ((m & n) ? 1 : 0)

/* Flags for call states */
#define CALL_STATE_IDLE 0
#define CALL_STATE_CONNECTED BIT(0)
#define CALL_STATE_CALLING BIT(1)
#define CALL_STATE_WFRANSWER BIT(2) /* The other end of CALL_STATE_CALLING */
#define CALL_STATE_AUDIORCV BIT(3)
#define CALL_STATE_AUDIOSND BIT(4)
#define CALL_STATE_HELLO BIT(5)
#define CALL_STATE_INCALL BIT(6)

extern int done;
extern char *intercom_config_path;
extern struct call_info call;

struct compression_format {
uint8_t fmt;
char *name;
char *description;
};
extern struct compression_format compression_table[];

void refresh_userdefs(void);
void icsetenv(const char *var, const char *value);
int do_connect(const char *hostname, int port, struct sockaddr_in *r_address);
int dsp_setup(const char *device, int mode, struct audio_params *params);
void queuepacket(struct iobuff *iob, uint16_t type, char *pkt, size_t pktlen);
void closecall(void);
int setup_udpsock(struct sockaddr_in *addr);
void send_errorpkt(struct iobuff *iob, uint16_t errorcode);
int int_compression(const char *s);
char *str_compression(int v);
char *to_printable(char *s);
#if (DEBUG >= 2)
void hexdump(const char *buff, size_t n);
#endif

#endif