winiphone.c

IAX协议客户端源码

								whin[i].dwBufferLength);
							return -1;
						}
						if(!most_recent_answer->gsmout)
								most_recent_answer->gsmout = gsm_create();

						service_network(netfd,f); /* service network here for better performance */
						/* encode the audio from the buffer into GSM format */
						gsm_encode(most_recent_answer->gsmout, (short *) ((char *) whin[i].lpData), fo);
						if(iax_send_voice(most_recent_answer->session,
							AST_FORMAT_GSM, (char *)fo, sizeof(gsm_frame)) == -1)
									puts("Failed to send voice!"); 
						lastouttick = GetTickCount(); /* save time of last output */

						/* unprepare (free) the header */
						waveInUnprepareHeader(win,&whin[i],sizeof(WAVEHDR));
						/* initialize the buffer */
						memset(&whin[i],0,sizeof(WAVEHDR));
						/* bump the serial number to look for the next time */
						nextwhin++;
						/* exit the loop so that we can start at lowest buffer again */
						break;
					}
				} 
				if (i >= NWHIN) break; /* if all found, get out of loop */
			}
		}

	}
	return 0;
}

void
do_iax_event(FILE *f) {
	int sessions = 0;
	struct iax_event *e = 0;
	struct peer *peer;

	while ( (e = iax_get_event(0))) {
		peer = find_peer(e->session);
		if(peer) {
			handle_event(f, e, peer);
		} else {
			if(e->etype != IAX_EVENT_CONNECT) {
				fprintf(stderr, "Huh? This is an event for a non-existant session?\n");
			}
			sessions++;

			if(sessions >= MAX_SESSIONS) {
				fprintf(f, "Missed a call... too many sessions open.\n");
			}


			if(e->event.connect.callerid && e->event.connect.dnid)
				fprintf(f, "Call from '%s' for '%s'", e->event.connect.callerid, 
				e->event.connect.dnid);
			else if(e->event.connect.dnid) {
				fprintf(f, "Call from '%s'", e->event.connect.dnid);
			} else if(e->event.connect.callerid) {
				fprintf(f, "Call from '%s'", e->event.connect.callerid);
			} else printf("Call from");
			fprintf(f, " (%s)\n", inet_ntoa(iax_get_peer_addr(e->session).sin_addr));

			if(most_recent_answer) {
				fprintf(f, "Incoming call ignored, there's already a call waiting for answer... \
please accept or reject first\n");
				iax_reject(e->session, "Too many calls, we're busy!");
			} else {
				if ( !(peer = malloc(sizeof(struct peer)))) {
					fprintf(f, "Warning: Unable to allocate memory!\n");
					return;
				}

				peer->time = time(0);
				peer->session = e->session;
				peer->gsmin = 0;
				peer->gsmout = 0;

				peer->next = peers;
				peers = peer;

				iax_accept(peer->session);
				iax_ring_announce(peer->session);
				most_recent_answer = peer;
				fprintf(f, "Incoming call!\n");
			}
			iax_event_free(e);
			issue_prompt(f);
		}
	}
}

void
call(FILE *f, char *num)
{
	struct peer *peer;

	if(!newcall)
		newcall = iax_session_new();
	else {
		fprintf(f, "Already attempting to call somewhere, please cancel first!\n");
		return;
	}

	if ( !(peer = malloc(sizeof(struct peer)))) {
		fprintf(f, "Warning: Unable to allocate memory!\n");
		return;
	}

	peer->time = time(0);
	peer->session = newcall;
	peer->gsmin = 0;
	peer->gsmout = 0;

	peer->next = peers;
	peers = peer;

	most_recent_answer = peer;

	iax_call(peer->session, num, 10);
}

void
answer_call(void)
{
	if(most_recent_answer)
		iax_answer(most_recent_answer->session);
	printf("Answering call!\n");
	answered_call = 1;
}

void
dump_call(void)
{
	if(most_recent_answer)
	{
		iax_hangup(most_recent_answer->session,"");
		free(most_recent_answer);
	}
	printf("Dumping call!\n");
	answered_call = 0;
	most_recent_answer = 0;
	answered_call = 0;
	peers = 0;
	newcall = 0;
}

void
reject_call(void)
{
	iax_reject(most_recent_answer->session, "Call rejected manually.");
	most_recent_answer = 0;
}

void
handle_event(FILE *f, struct iax_event *e, struct peer *p)
{
	int len,n;
	WHOUT *wh,*wh1;
	short fr[160];
	static paused_xmit = 0;


	switch(e->etype) {
		case IAX_EVENT_HANGUP:
			iax_hangup(most_recent_answer->session, "Byeee!");
			fprintf(f, "Call disconnected by peer\n");
			free(most_recent_answer);
			most_recent_answer = 0;
			answered_call = 0;
			peers = 0;
			newcall = 0;
			
			break;

		case IAX_EVENT_REJECT:
			fprintf(f, "Authentication was rejected\n");
			break;
		case IAX_EVENT_ACCEPT:
			fprintf(f, "Waiting for answer... RING RING\n");
			issue_prompt(f);
			break;
		case IAX_EVENT_ANSWER:
			answer_call();
 			break;
		case IAX_EVENT_VOICE:
			switch(e->event.voice.format) {
				case AST_FORMAT_GSM:
					if(e->event.voice.datalen % 33) {
						fprintf(stderr, "Weird gsm frame, not a multiple of 33.\n");
						break;
					}

					if (!p->gsmin)
						p->gsmin = gsm_create();

					len = 0;
					while(len < e->event.voice.datalen) {
						if(gsm_decode(p->gsmin, (char *) e->event.voice.data + len, fr)) {
							fprintf(stderr, "Bad GSM data\n");
							break;
						} else {  /* its an audio packet to be output to user */

							/* get count of pending items in audio output queue */
							n = 0; 
							if (outqueue) 
							{	/* determine number of pending out queue items */
								for(wh = outqueue; wh != NULL; wh = wh->next)
								{
									if (!(wh->w.dwFlags & WHDR_DONE)) n++;
								}
							}
							/* if not too many, send to user, otherwise chuck packet */
							if (n <= OUT_DEPTH) /* if not to chuck packet */
							{
								/* malloc the memory for the queue item */
								wh = (WHOUT *) malloc(sizeof(WHOUT));
								if (wh == (WHOUT *) NULL) /* if error, bail */
								{
									fprintf(stderr,"Outa memory!!!!\n");
									exit(255);
								}
								/* initialize the queue entry */
								memset(wh,0,sizeof(WHOUT));
								/* copy the PCM data from the gsm conversion buffer */
								memcpy((char *)wh->data,(char *)fr,sizeof(fr));
								/* set parameters for data */
								wh->w.lpData = (char *) wh->data;
								wh->w.dwBufferLength = 320;
								
								/* prepare buffer for output */
								if (waveOutPrepareHeader(wout,&wh->w,sizeof(WAVEHDR)))
								{
									fprintf(stderr,"Cannot prepare header for audio out\n");
									exit(255);
								}
								/* if not currently transmitting, hold off a couple of packets for 
									smooth sounding output */
								if ((!n) && (!paused_xmit))
								{
									/* pause output (before starting) */
									waveOutPause(wout);
									/* indicate as such */
									paused_xmit = 1;
								}
								/* queue packet for output on audio device */
								if (waveOutWrite(wout,&wh->w,sizeof(WAVEHDR)))
								{
									fprintf(stderr,"Cannot output to wave output device\n");
									exit(255);
								}
								/* if we are paused, and we have enough packets, start audio */
								if ((n > OUT_PAUSE_THRESHOLD) && paused_xmit)
								{
									/* start the output */
									waveOutRestart(wout);
									/* indicate as such */
									paused_xmit = 0;
								}
								/* insert it onto tail of outqueue */
								if (outqueue == NULL) /* if empty queue */
									outqueue = wh; /* point queue to new entry */
								else /* otherwise is non-empty queue */
								{
									wh1 = outqueue;
									while(wh1->next) wh1 = wh1->next; /* find last entry in queue */
									wh1->next = wh; /* point it to new entry */
								}
							} 
#ifdef	PRINTCHUCK
							else printf("Chucking packet!!\n");
#endif
						}
						len += 33;
					}
					break;
				default :
					fprintf(f, "Don't know how to handle that format %d\n", e->event.voice.format);
			}
			break;
		case IAX_EVENT_RINGA:
			break;
		default:
			fprintf(f, "Unknown event: %d\n", e->etype);
			break;
	}
}

void
parse_cmd(FILE *f, int argc, char **argv)
{
	_strupr(argv[0]);
	if(!strcmp(argv[0], "HELP")) {
		if(argc == 1)
			dump_array(f, help);
		else if(argc == 2) {
			if(!strcmp(argv[1], "HELP"))
				fprintf(f, "Help <Command>\t-\tDisplays general help or specific help on command if supplied an arguement\n");
			else if(!strcmp(argv[1], "QUIT"))
				fprintf(f, "Quit\t\t-\tShuts down the miniphone\n");
			else fprintf(f, "No help available on %s\n", argv[1]);
		} else {
			fprintf(f, "Too many arguements for command help.\n");
		}
	} else if(!strcmp(argv[0], "STATUS")) {
		if(argc == 1) {
			int c = 0;
			struct peer *peerptr = peers;

			if(!peerptr)
				fprintf(f, "No session matches found.\n");
			else while(peerptr) {
	 			fprintf(f, "Listing sessions:\n\n");
				fprintf(f, "Session %d\n", ++c);
				fprintf(f, "Session existed for %d seconds\n", (int)time(0)-peerptr->time);
				if(answered_call)
					fprintf(f, "Call answered.\n");
				else fprintf(f, "Call ringing.\n");

				peerptr = peerptr->next;
			}
		} else fprintf(f, "Too many arguments for command status.\n");
	} else if(!strcmp(argv[0], "ANSWER")) {
		if(argc > 1)
			fprintf(f, "Too many arguements for command answer\n");
		else answer_call();
	} else if(!strcmp(argv[0], "REJECT")) {
		if(argc > 1)
			fprintf(f, "Too many arguements for command reject\n");
		else {
			fprintf(f, "Rejecting current phone call.\n");
			reject_call();
		}
	} else if(!strcmp(argv[0], "CALL")) {
		if(argc > 2)
			fprintf(f, "Too many arguements for command call\n");
		else {
			call(f, argv[1]);
		}
	} else if(!strcmp(argv[0], "DUMP")) {
		if(argc > 1)
			fprintf(f, "Too many arguements for command dump\n");
		else {
			dump_call();
		}
	} else if(!strcmp(argv[0], "DTMF")) {
		if(argc > 2)
		{
			fprintf(f, "Too many arguements for command dtmf\n");
			return;
		}
		if (argc < 1)
		{
			fprintf(f, "Too many arguements for command dtmf\n");
			return;
		}
		if(most_recent_answer)
				iax_send_dtmf(most_recent_answer->session,*argv[1]);
	} else if(!strcmp(argv[0], "QUIT")) {
		if(argc > 1)
			fprintf(f, "Too many arguements for command quit\n");
		else {
			fprintf(f, "Good bye!\n");
			exit(1);
		}
	} else fprintf(f, "Unknown command of %s\n", argv[0]);
}

void
issue_prompt(FILE *f)
{
	fprintf(f, "TeleClient> ");
	fflush(f);
}

void
dump_array(FILE *f, char **array) {
	while(*array)
		fprintf(f, "%s\n", *array++);
}