chan_vpb.c

/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2003, Paul Bagyenda
 * Paul Bagyenda <bagyenda@dsmagic.com>
 * Copyright (C) 2004 - 2005, Ben Kramer
 * Ben Kramer <ben@voicetronix.com.au>
 *
 * Daniel Bichara <daniel@bichara.com.br> - Brazilian CallerID detection (c)2004 
 *
 * Welber Silveira - welberms@magiclink.com.br - (c)2004
 * Copying CLID string to propper structure after detection
 *
 * 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 VoiceTronix Interface driver
 * 
 * \ingroup channel_drivers
 */


extern "C" {

#include <stdio.h>
#include <string.h>

#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision$")

#include "asterisk/lock.h"
#include "asterisk/utils.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/logger.h"
#include "asterisk/module.h"
#include "asterisk/pbx.h"
#include "asterisk/options.h"
#include "asterisk/callerid.h"
#include "asterisk/dsp.h"
#include "asterisk/features.h"
}

#include <sys/socket.h>
#include <sys/time.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <ctype.h>

#include <vpbapi.h>
#include <assert.h>

#ifdef pthread_create
#undef pthread_create
#endif

#define DEFAULT_GAIN 0
#define DEFAULT_ECHO_CANCEL 1
  
#define VPB_SAMPLES 160 
#define VPB_MAX_BUF VPB_SAMPLES*4 + AST_FRIENDLY_OFFSET

#define VPB_NULL_EVENT 200

#define VPB_WAIT_TIMEOUT 4000

#define MAX_VPB_GAIN 12.0
#define MIN_VPB_GAIN -12.0

#define DTMF_CALLERID  
#define DTMF_CID_START 'D'
#define DTMF_CID_STOP 'C'

/**/
#if defined(__cplusplus) || defined(c_plusplus)
 extern "C" {
#endif
/**/

static const char desc[] = "VoiceTronix V6PCI/V12PCI/V4PCI  API Support";
static const char tdesc[] = "Standard VoiceTronix API Driver";
static const char config[] = "vpb.conf";

/* Default context for dialtone mode */
static char context[AST_MAX_EXTENSION] = "default";

/* Default language */
static char language[MAX_LANGUAGE] = "";
static int usecnt =0;

static int gruntdetect_timeout = 3600000; /* Grunt detect timeout is 1hr. */

static const int prefformat = AST_FORMAT_SLINEAR;

AST_MUTEX_DEFINE_STATIC(usecnt_lock);

/* Protect the interface list (of vpb_pvt's) */
AST_MUTEX_DEFINE_STATIC(iflock);

/* Protect the monitoring thread, so only one process can kill or start it, and not
   when it's doing something critical. */
AST_MUTEX_DEFINE_STATIC(monlock);

/* This is the thread for the monitor which checks for input on the channels
   which are not currently in use.  */
static pthread_t monitor_thread;

static int mthreadactive = -1; /* Flag for monitoring monitorthread.*/


static int restart_monitor(void);

/* The private structures of the VPB channels are 
   linked for selecting outgoing channels */
   
#define MODE_DIALTONE 	1
#define MODE_IMMEDIATE	2
#define MODE_FXO	3

/* Pick a country or add your own! */
/* These are the tones that are played to the user */
#define TONES_AU
/* #define TONES_USA */

#ifdef TONES_AU
static VPB_TONE Dialtone     = {440,   	440, 	440, 	-10,  	-10, 	-10, 	5000,	0   };
static VPB_TONE Busytone     = {470,   	0,   	0, 	-10,  	-100, 	-100,   5000, 	0 };
static VPB_TONE Ringbacktone = {400,   	50,   	440, 	-10,  	-10, 	-10,  	1400, 	800 };
#endif
#ifdef TONES_USA
static VPB_TONE Dialtone     = {350, 440,   0, -16,   -16, -100, 10000,    0};
static VPB_TONE Busytone     = {480, 620,   0, -10,   -10, -100,   500,  500};
static VPB_TONE Ringbacktone = {440, 480,   0, -20,   -20, -100,  2000, 4000};
#endif

/* grunt tone defn's */
#if 0
static VPB_DETECT toned_grunt = { 3, VPB_GRUNT, 1, 2000, 3000, 0, 0, -40, 0, 0, 0, 40, { { VPB_DELAY, 1000, 0, 0 }, { VPB_RISING, 0, 40, 0 }, { 0, 100, 0, 0 } } };
#endif
static VPB_DETECT toned_ungrunt = { 2, VPB_GRUNT, 1, 2000, 1, 0, 0, -40, 0, 0, 30, 40, { { 0, 0, 0, 0 } } };

/* Use loop polarity detection for CID */
static int UsePolarityCID=0;

/* Use loop drop detection */
static int UseLoopDrop=1;

/* To use or not to use Native bridging */
static int UseNativeBridge=1;

/* Use Asterisk Indication or VPB */
static int use_ast_ind=0;

/* Use Asterisk DTMF detection or VPB */
static int use_ast_dtmfdet=0;

static int relaxdtmf=0;

/* Use Asterisk DTMF play back or VPB */
static int use_ast_dtmf=0;

/* Break for DTMF on native bridge ? */
static int break_for_dtmf=1;

/* Set EC suppression threshold */
static int ec_supp_threshold=-1;

/* Inter Digit Delay for collecting DTMF's */
static int dtmf_idd = 3000;

#define TIMER_PERIOD_RINGBACK 2000
#define TIMER_PERIOD_BUSY 700
#define TIMER_PERIOD_RING 4000
static int timer_period_ring = TIMER_PERIOD_RING;
	  
#define VPB_EVENTS_ALL (VPB_MRING|VPB_MDIGIT|VPB_MDTMF|VPB_MTONEDETECT|VPB_MTIMEREXP|VPB_MPLAY_UNDERFLOW \
			|VPB_MRECORD_OVERFLOW|VPB_MSTATION_OFFHOOK|VPB_MSTATION_ONHOOK \
			|VPB_MRING_OFF|VPB_MDROP|VPB_MSTATION_FLASH)
#define VPB_EVENTS_NODROP (VPB_MRING|VPB_MDIGIT|VPB_MDTMF|VPB_MTONEDETECT|VPB_MTIMEREXP|VPB_MPLAY_UNDERFLOW \
			|VPB_MRECORD_OVERFLOW|VPB_MSTATION_OFFHOOK|VPB_MSTATION_ONHOOK \
			|VPB_MRING_OFF|VPB_MSTATION_FLASH)
#define VPB_EVENTS_NODTMF (VPB_MRING|VPB_MDIGIT|VPB_MTONEDETECT|VPB_MTIMEREXP|VPB_MPLAY_UNDERFLOW \
			|VPB_MRECORD_OVERFLOW|VPB_MSTATION_OFFHOOK|VPB_MSTATION_ONHOOK \
			|VPB_MRING_OFF|VPB_MDROP|VPB_MSTATION_FLASH)
#define VPB_EVENTS_STAT (VPB_MRING|VPB_MDIGIT|VPB_MDTMF|VPB_MTONEDETECT|VPB_MTIMEREXP|VPB_MPLAY_UNDERFLOW \
			|VPB_MRECORD_OVERFLOW|VPB_MSTATION_OFFHOOK|VPB_MSTATION_ONHOOK \
			|VPB_MRING_OFF|VPB_MSTATION_FLASH)


/* Dialing parameters for Australia */
/* #define DIAL_WITH_CALL_PROGRESS */
VPB_TONE_MAP DialToneMap[] = { 	{ VPB_BUSY_AUST, VPB_CALL_DISCONNECT, 0 },
  				{ VPB_DIAL, VPB_CALL_DIALTONE, 0 },
				{ VPB_RINGBACK_308, VPB_CALL_RINGBACK, 0 },
				{ VPB_BUSY_AUST, VPB_CALL_BUSY, 0 },
				{ VPB_GRUNT, VPB_CALL_GRUNT, 0 },
				{ 0, 0, 1 } };
#define VPB_DIALTONE_WAIT 2000 /* Wait up to 2s for a dialtone */
#define VPB_RINGWAIT 4000 /* Wait up to 4s for ring tone after dialing */
#define VPB_CONNECTED_WAIT 4000 /* If no ring tone detected for 4s then consider call connected */
#define TIMER_PERIOD_NOANSWER 120000 /* Let it ring for 120s before deciding theres noone there */

#define MAX_BRIDGES_V4PCI 2
#define MAX_BRIDGES_V12PCI 128

/* port states */
#define VPB_STATE_ONHOOK	0
#define VPB_STATE_OFFHOOK	1
#define VPB_STATE_DIALLING	2
#define VPB_STATE_JOINED	3
#define VPB_STATE_GETDTMF	4
#define VPB_STATE_PLAYDIAL	5
#define VPB_STATE_PLAYBUSY	6
#define VPB_STATE_PLAYRING	7

#define VPB_GOT_RXHWG		1
#define VPB_GOT_TXHWG		2
#define VPB_GOT_RXSWG		4
#define VPB_GOT_TXSWG		8

typedef struct  {
	int inuse;
	struct ast_channel *c0, *c1, **rc;
	struct ast_frame **fo;
	int flags;
	ast_mutex_t lock;
	ast_cond_t cond;
	int endbridge;
} vpb_bridge_t;

static vpb_bridge_t * bridges;
static int max_bridges = MAX_BRIDGES_V4PCI;

AST_MUTEX_DEFINE_STATIC(bridge_lock);

typedef enum {
	vpb_model_unknown = 0, 
	vpb_model_v4pci,
	vpb_model_v12pci
} vpb_model_t;

static struct vpb_pvt {

	ast_mutex_t owner_lock;			/* Protect blocks that expect ownership to remain the same */
	struct ast_channel *owner;		/* Channel who owns us, possibly NULL */

	int golock;				/* Got owner lock ? */

	int mode;				/* fxo/imediate/dialtone*/
	int handle;				/* Handle for vpb interface */

	int state;				/* used to keep port state (internal to driver) */

	int group;				/* Which group this port belongs to */
	ast_group_t callgroup;                  /* Call group */
	ast_group_t pickupgroup;                /* Pickup group */


	char dev[256];				/* Device name, eg vpb/1-1 */
	vpb_model_t vpb_model;			/* card model */

	struct ast_frame f, fr;			/* Asterisk frame interface */
	char buf[VPB_MAX_BUF];			/* Static buffer for reading frames */

	int dialtone;				/* NOT USED */
	float txgain, rxgain;			/* Hardware gain control */
	float txswgain, rxswgain;		/* Software gain control */

	int wantdtmf;				/* Waiting for DTMF. */
	char context[AST_MAX_EXTENSION];	/* The context for this channel */

	char ext[AST_MAX_EXTENSION];		/* DTMF buffer for the ext[ens] */
	char language[MAX_LANGUAGE];		/* language being used */
	char callerid[AST_MAX_EXTENSION];	/* CallerId used for directly connected phone */
	int  callerid_type;			/* Caller ID type: 0=>none 1=>vpb 2=>AstV23 3=>AstBell */
	char cid_num[AST_MAX_EXTENSION];
	char cid_name[AST_MAX_EXTENSION];

	int dtmf_caller_pos;			/* DTMF CallerID detection (Brazil)*/

	int lastoutput;				/* Holds the last Audio format output'ed */
	int lastinput;				/* Holds the last Audio format input'ed */
	int last_ignore_dtmf;

	void *busy_timer;			/* Void pointer for busy vpb_timer */
	int busy_timer_id;			/* unique timer ID for busy timer */

	void *ringback_timer; 			/* Void pointer for ringback vpb_timer */
	int ringback_timer_id;			/* unique timer ID for ringback timer */

	void *ring_timer;			/* Void pointer for ring vpb_timer */
	int ring_timer_id;			/* unique timer ID for ring timer */

	void *dtmfidd_timer;			/* Void pointer for DTMF IDD vpb_timer */
	int dtmfidd_timer_id;			/* unique timer ID for DTMF IDD timer */

	struct ast_dsp *vad;			/* AST  Voice Activation Detection dsp */

	struct timeval lastgrunt;			/* time stamp of last grunt event */

	ast_mutex_t lock;			/* This one just protects bridge ptr below */
	vpb_bridge_t *bridge;

	int stopreads; 				/* Stop reading...*/
	int read_state;				/* Read state */
	int chuck_count;			/* a count of packets weve chucked away!*/
	pthread_t readthread;			/* For monitoring read channel. One per owned channel. */

	ast_mutex_t record_lock;		/* This one prevents reentering a record_buf block */
	ast_mutex_t play_lock;			/* This one prevents reentering a play_buf block */
	int  play_buf_time;			/* How long the last play_buf took */
	struct timeval lastplay;		/* Last play time */

	ast_mutex_t play_dtmf_lock;
	char play_dtmf[16];

	int faxhandled;				/* has a fax tone been handled ? */

	struct vpb_pvt *next;			/* Next channel in list */

} *iflist = NULL;

static struct ast_channel *vpb_new(struct vpb_pvt *i, int state, char *context);
static void *do_chanreads(void *pvt);

static struct ast_channel *vpb_request(const char *type, int format, void *data, int *cause);
static int vpb_digit(struct ast_channel *ast, char digit);
static int vpb_call(struct ast_channel *ast, char *dest, int timeout);
static int vpb_hangup(struct ast_channel *ast);
static int vpb_answer(struct ast_channel *ast);
static struct ast_frame *vpb_read(struct ast_channel *ast);
static int vpb_write(struct ast_channel *ast, struct ast_frame *frame);
static enum ast_bridge_result ast_vpb_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc, int timeoutms);
static int vpb_indicate(struct ast_channel *ast, int condition);
static int vpb_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);

static struct ast_channel_tech vpb_tech = {
	type: "vpb",
	description: tdesc,
	capabilities: AST_FORMAT_SLINEAR,
	properties: 0,
	requester: vpb_request,
	devicestate: NULL,
	send_digit: vpb_digit,
	send_digit_begin: NULL,
	send_digit_end: NULL,
	call: vpb_call,
	hangup: vpb_hangup,
	answer: vpb_answer,
	read: vpb_read,
	write: vpb_write,
	send_text: NULL,
	send_image: NULL,
	send_html: NULL,
	exception: NULL,
	bridge: ast_vpb_bridge,
	indicate: vpb_indicate,
	fixup: vpb_fixup,
	setoption: NULL,
	queryoption: NULL,
	transfer: NULL,
	write_video: NULL,
	bridged_channel: NULL
};

static struct ast_channel_tech vpb_tech_indicate = {
	type: "vpb",
	description: tdesc,
	capabilities: AST_FORMAT_SLINEAR,
	properties: 0,
	requester: vpb_request,
	devicestate: NULL,
	send_digit: vpb_digit,
	send_digit_begin: NULL,
	send_digit_end: NULL,
	call: vpb_call,
	hangup: vpb_hangup,
	answer: vpb_answer,
	read: vpb_read,
	write: vpb_write,
	send_text: NULL,
	send_image: NULL,
	send_html: NULL,
	exception: NULL,
	bridge: ast_vpb_bridge,
	indicate: NULL,
	fixup: vpb_fixup,
	setoption: NULL,
	queryoption: NULL,
	transfer: NULL,
	write_video: NULL,
	bridged_channel: NULL
};

/* Can't get ast_vpb_bridge() working on v4pci without either a horrible 
*  high pitched feedback noise or bad hiss noise depending on gain settings
*  Get asterisk to do the bridging
*/
#define BAD_V4PCI_BRIDGE

/* This one enables a half duplex bridge which may be required to prevent high pitched
 * feedback when getting asterisk to do the bridging and when using certain gain settings.
 */
/* #define HALF_DUPLEX_BRIDGE */

/* This is the Native bridge code, which Asterisk will try before using its own bridging code */
static enum ast_bridge_result ast_vpb_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc, int timeoutms)
{
	struct vpb_pvt *p0 = (struct vpb_pvt *)c0->tech_pvt;
	struct vpb_pvt *p1 = (struct vpb_pvt *)c1->tech_pvt;
	int i;
	int res;
	struct ast_channel *cs[3];
	struct ast_channel *who;
	struct ast_frame *f;

	cs[0] = c0;
	cs[1] = c1;

	#ifdef BAD_V4PCI_BRIDGE
	if(p0->vpb_model==vpb_model_v4pci)
		return AST_BRIDGE_FAILED_NOWARN;
	#endif
	if ( UseNativeBridge != 1){
		return AST_BRIDGE_FAILED_NOWARN;
	}

/*
	ast_mutex_lock(&p0->lock);
	ast_mutex_lock(&p1->lock);
*/

	/* Bridge channels, check if we can.  I believe we always can, so find a slot.*/

	ast_mutex_lock(&bridge_lock); {
		for (i = 0; i < max_bridges; i++) 
			if (!bridges[i].inuse)
				break;
		if (i < max_bridges) {
			bridges[i].inuse = 1;
			bridges[i].endbridge = 0;
			bridges[i].flags = flags;
			bridges[i].rc = rc;
			bridges[i].fo = fo;
			bridges[i].c0 = c0;
			bridges[i].c1 = c1;
		} 	       
	} ast_mutex_unlock(&bridge_lock); 

	if (i == max_bridges) {
		ast_log(LOG_WARNING, "%s: vpb_bridge: Failed to bridge %s and %s!\n", p0->dev, c0->name, c1->name);
		ast_mutex_unlock(&p0->lock);
		ast_mutex_unlock(&p1->lock);
		return AST_BRIDGE_FAILED_NOWARN;
	} else {
		/* Set bridge pointers. You don't want to take these locks while holding bridge lock.*/
		ast_mutex_lock(&p0->lock); {
			p0->bridge = &bridges[i];
		} ast_mutex_unlock(&p0->lock);

		ast_mutex_lock(&p1->lock); {
			p1->bridge = &bridges[i];
		} ast_mutex_unlock(&p1->lock);

		if (option_verbose>1) 
			ast_verbose(VERBOSE_PREFIX_2 "%s: vpb_bridge: Bridging call entered with [%s, %s]\n",p0->dev, c0->name, c1->name);
	}

	if (option_verbose > 2) 
		ast_verbose(VERBOSE_PREFIX_3 "Native bridging %s and %s\n", c0->name, c1->name);

	#ifdef HALF_DUPLEX_BRIDGE

	if (option_verbose>1) 
		ast_verbose(VERBOSE_PREFIX_2 "%s: vpb_bridge: Starting half-duplex bridge [%s, %s]\n",p0->dev, c0->name, c1->name);

	int dir = 0;

	memset(p0->buf, 0, sizeof p0->buf);
	memset(p1->buf, 0, sizeof p1->buf);

	vpb_record_buf_start(p0->handle, VPB_ALAW);
	vpb_record_buf_start(p1->handle, VPB_ALAW);

	vpb_play_buf_start(p0->handle, VPB_ALAW);
	vpb_play_buf_start(p1->handle, VPB_ALAW);

	while( !bridges[i].endbridge ) {
		struct vpb_pvt *from, *to;
		if(++dir%2) {
			from = p0;
			to = p1;
		} else {
			from = p1;
			to = p0;
		}
		vpb_record_buf_sync(from->handle, from->buf, VPB_SAMPLES);
		vpb_play_buf_sync(to->handle, from->buf, VPB_SAMPLES);
	}

	vpb_record_buf_finish(p0->handle);
	vpb_record_buf_finish(p1->handle);

	vpb_play_buf_finish(p0->handle);
	vpb_play_buf_finish(p1->handle);

	if (option_verbose>1) 
		ast_verbose(VERBOSE_PREFIX_2 "%s: vpb_bridge: Finished half-duplex bridge [%s, %s]\n",p0->dev, c0->name, c1->name);

	res = VPB_OK;

	#else

	res = vpb_bridge(p0->handle, p1->handle, VPB_BRIDGE_ON, i+1 /* resource 1 & 2 only for V4PCI*/ );
	if (res == VPB_OK) {
		/* pthread_cond_wait(&bridges[i].cond, &bridges[i].lock);*/ /* Wait for condition signal. */
		while( !bridges[i].endbridge ) {
			/* Are we really ment to be doing nothing ?!?! */
			who = ast_waitfor_n(cs, 2, &timeoutms);
			if (!who) {
				if (!timeoutms) {
					res = AST_BRIDGE_RETRY;
					break;
				}
				ast_log(LOG_DEBUG, "%s: vpb_bridge: Empty frame read...\n",p0->dev);
				/* check for hangup / whentohangup */
				if (ast_check_hangup(c0) || ast_check_hangup(c1))
					break;
				continue;
			}
			f = ast_read(who);
			if (!f || ((f->frametype == AST_FRAME_DTMF) &&
					   (((who == c0) && (flags & AST_BRIDGE_DTMF_CHANNEL_0)) || 
				       ((who == c1) && (flags & AST_BRIDGE_DTMF_CHANNEL_1))))) {
				*fo = f;
				*rc = who;
				ast_log(LOG_DEBUG, "%s: vpb_bridge: Got a [%s]\n",p0->dev, f ? "digit" : "hangup");
/*
				if ((c0->tech_pvt == pvt0) && (!c0->_softhangup)) {
					if (pr0->set_rtp_peer(c0, NULL, NULL, 0)) 
						ast_log(LOG_WARNING, "Channel '%s' failed to revert\n", c0->name);
				}
				if ((c1->tech_pvt == pvt1) && (!c1->_softhangup)) {
					if (pr1->set_rtp_peer(c1, NULL, NULL, 0)) 
						ast_log(LOG_WARNING, "Channel '%s' failed to revert back\n", c1->name);
				}
*/
				/* That's all we needed */
				/*return 0; */
				/* Check if we need to break */
				if (break_for_dtmf){
					break;
				}
				else if ((f->frametype == AST_FRAME_DTMF) && ((f->subclass == '#')||(f->subclass == '*'))){
					break;
				}
			} else {
				if ((f->frametype == AST_FRAME_DTMF) || 
					(f->frametype == AST_FRAME_VOICE) || 
					(f->frametype == AST_FRAME_VIDEO)) 
					{
					/* Forward voice or DTMF frames if they happen upon us */
					/* Actually I dont think we want to forward on any frames!
					if (who == c0) {
						ast_write(c1, f);
					} else if (who == c1) {
						ast_write(c0, f);
					}
					*/
				}
				ast_frfree(f);
			}
			/* Swap priority not that it's a big deal at this point */
			cs[2] = cs[0];
			cs[0] = cs[1];
			cs[1] = cs[2];
		};
		vpb_bridge(p0->handle, p1->handle, VPB_BRIDGE_OFF, i+1 /* resource 1 & 2 only for V4PCI*/ ); 
	}

	#endif

	ast_mutex_lock(&bridge_lock); {
		bridges[i].inuse = 0;
	} ast_mutex_unlock(&bridge_lock); 

	p0->bridge = NULL;
	p1->bridge = NULL;


	if (option_verbose>1) 
		ast_verbose(VERBOSE_PREFIX_2 "Bridging call done with [%s, %s] => %d\n", c0->name, c1->name, res);

/*
	ast_mutex_unlock(&p0->lock);
	ast_mutex_unlock(&p1->lock);
*/
	return (res==VPB_OK) ? AST_BRIDGE_COMPLETE : AST_BRIDGE_FAILED;
}

/* Caller ID can be located in different positions between the rings depending on your Telco
 * Australian (Telstra) callerid starts 700ms after 1st ring and finishes 1.5s after first ring
 * Use ANALYSE_CID to record rings and determine location of callerid
 */
/* #define ANALYSE_CID */
#define RING_SKIP 300
#define CID_MSECS 2000

static void get_callerid(struct vpb_pvt *p)
{
	short buf[CID_MSECS*8]; /* 8kHz sampling rate */
	struct timeval cid_record_time;
	int rc;
	struct ast_channel *owner = p->owner;
/*
	char callerid[AST_MAX_EXTENSION] = ""; 
*/
#ifdef ANALYSE_CID
	void * ws;
	char * file="cidsams.wav";
#endif


	if( ast_mutex_trylock(&p->record_lock) == 0 ) {

		cid_record_time = ast_tvnow();
		if (option_verbose>3) 
			ast_verbose(VERBOSE_PREFIX_4 "CID record - start\n");

		/* Skip any trailing ringtone */
		if (UsePolarityCID != 1){
			vpb_sleep(RING_SKIP);
		}

		if (option_verbose>3) 
			ast_verbose(VERBOSE_PREFIX_4 "CID record - skipped %dms trailing ring\n",
				 ast_tvdiff_ms(ast_tvnow(), cid_record_time));
		cid_record_time = ast_tvnow();

		/* Record bit between the rings which contains the callerid */
		vpb_record_buf_start(p->handle, VPB_LINEAR);
		rc = vpb_record_buf_sync(p->handle, (char*)buf, sizeof(buf));
		vpb_record_buf_finish(p->handle);
#ifdef ANALYSE_CID
		vpb_wave_open_write(&ws, file, VPB_LINEAR);
		vpb_wave_write(ws,(char*)buf,sizeof(buf));
		vpb_wave_close_write(ws);
#endif

		if (option_verbose>3) 
			ast_verbose(VERBOSE_PREFIX_4 "CID record - recorded %dms between rings\n", 
				 ast_tvdiff_ms(ast_tvnow(), cid_record_time));

		ast_mutex_unlock(&p->record_lock);

		if( rc != VPB_OK ) {
			ast_log(LOG_ERROR, "Failed to record caller id sample on %s\n", p->dev );
			return;
		}

		VPB_CID *cli_struct = new VPB_CID;
		cli_struct->ra_cldn[0]=0;
		cli_struct->ra_cn[0]=0;
		/* This decodes FSK 1200baud type callerid */
		if ((rc=vpb_cid_decode2(cli_struct, buf, CID_MSECS*8)) == VPB_OK ) {
			/*
			if (owner->cid.cid_num)
				free(owner->cid.cid_num);
			owner->cid.cid_num=NULL;
			if (owner->cid.cid_name)
				free(owner->cid.cid_name);
			owner->cid.cid_name=NULL;
			*/
			
			if (cli_struct->ra_cldn[0]=='\0'){
				/*
				owner->cid.cid_num = strdup(cli_struct->cldn);
				owner->cid.cid_name = strdup(cli_struct->cn);
				*/
				if (owner){
					ast_set_callerid(owner, cli_struct->cldn, cli_struct->cn, cli_struct->cldn);
				} else {
					strcpy(p->cid_num, cli_struct->cldn);
					strcpy(p->cid_name, cli_struct->cn);

				}
				if (option_verbose>3) 
					ast_verbose(VERBOSE_PREFIX_4 "CID record - got [%s] [%s]\n",owner->cid.cid_num,owner->cid.cid_name );
				snprintf(p->callerid,sizeof(p->callerid)-1,"%s %s",cli_struct->cldn,cli_struct->cn);
			}
			else {
				ast_log(LOG_ERROR,"CID record - No caller id avalable on %s \n", p->dev);
			}

		} else {
			ast_log(LOG_ERROR, "CID record - Failed to decode caller id on %s - %s\n", p->dev, vpb_strerror(rc) );
			strncpy(p->callerid,"unknown", sizeof(p->callerid) - 1);
		}
		delete cli_struct;

	} else 
		ast_log(LOG_ERROR, "CID record - Failed to set record mode for caller id on %s\n", p->dev );
}

static void get_callerid_ast(struct vpb_pvt *p)
{
	struct callerid_state *cs;
	char buf[1024];
	char *name=NULL, *number=NULL;
	int flags;
	int rc=0,vrc;
	int sam_count=0;
	struct ast_channel *owner = p->owner;
	int which_cid;
/*
	float old_gain;
*/
#ifdef ANALYSE_CID
	void * ws;
	char * file="cidsams.wav";
#endif

	if(p->callerid_type == 1) {
	if (option_verbose>3) ast_verbose(VERBOSE_PREFIX_4 "Collected caller ID already\n");
		return;
	}
	else if(p->callerid_type == 2 ) {
		which_cid=CID_SIG_V23;
	if (option_verbose>3) ast_verbose(VERBOSE_PREFIX_4 "Collecting Caller ID v23...\n");
	}
	else if(p->callerid_type == 3) {
		which_cid=CID_SIG_BELL;
	if (option_verbose>3) ast_verbose(VERBOSE_PREFIX_4 "Collecting Caller ID bell...\n");
	}
	else {
		if (option_verbose>3) 
			ast_verbose(VERBOSE_PREFIX_4 "Caller ID disabled\n");
		return;
	}
/*	vpb_sleep(RING_SKIP); */
/*	vpb_record_get_gain(p->handle, &old_gain); */
	cs = callerid_new(which_cid);
	if (cs){
#ifdef ANALYSE_CID
		vpb_wave_open_write(&ws, file, VPB_MULAW); 
		vpb_record_set_gain(p->handle, 3.0); 
		vpb_record_set_hw_gain(p->handle,12.0); 
#endif
		vpb_record_buf_start(p->handle, VPB_MULAW);
		while((rc == 0)&&(sam_count<8000*3)){
			vrc = vpb_record_buf_sync(p->handle, (char*)buf, sizeof(buf));
			if (vrc != VPB_OK)
				ast_log(LOG_ERROR, "%s: Caller ID couldnt read audio buffer!\n",p->dev);
			rc = callerid_feed(cs,(unsigned char *)buf,sizeof(buf),AST_FORMAT_ULAW);
#ifdef ANALYSE_CID
			vpb_wave_write(ws,(char*)buf,sizeof(buf)); 
#endif
			sam_count+=sizeof(buf);
			if (option_verbose>3) ast_verbose(VERBOSE_PREFIX_4 "Collecting Caller ID samples [%d][%d]...\n",sam_count,rc);
		}
		vpb_record_buf_finish(p->handle);
#ifdef ANALYSE_CID
		vpb_wave_close_write(ws); 
#endif
		if (rc == 1){
			callerid_get(cs, &name, &number, &flags);
			if (option_verbose>0) 
				ast_verbose(VERBOSE_PREFIX_1 "%s: Caller ID name [%s] number [%s] flags [%d]\n",p->dev,name, number,flags);
		}
		else {
			ast_log(LOG_ERROR, "%s: Failed to decode Caller ID \n", p->dev );
		}
/*		vpb_record_set_gain(p->handle, old_gain); */
/*		vpb_record_set_hw_gain(p->handle,6.0); */
	}
	else {
		ast_log(LOG_ERROR, "%s: Failed to create Caller ID struct\n", p->dev );
	}
	if (owner->cid.cid_num) {
		free(owner->cid.cid_num);
		owner->cid.cid_num = NULL;
	}
	if (owner->cid.cid_name) {
		free(owner->cid.cid_name);
		owner->cid.cid_name = NULL;
	}
	if (number)
		ast_shrink_phone_number(number);
	if (!ast_strlen_zero(number)) {
		owner->cid.cid_num = strdup(number);
		owner->cid.cid_ani = strdup(number);
		if (!ast_strlen_zero(name)){
			owner->cid.cid_name = strdup(name);
			snprintf(p->callerid,(sizeof(p->callerid)-1),"%s %s",number,name);
		}
		else {
			snprintf(p->callerid,(sizeof(p->callerid)-1),"%s",number);
		}
	}
														     
	if (cs)
		callerid_free(cs);
}

/* Terminate any tones we are presently playing */
static void stoptone( int handle)
{
	int ret;
	VPB_EVENT je;
	while(vpb_playtone_state(handle)!=VPB_OK){
		vpb_tone_terminate(handle);
		ret = vpb_get_event_ch_async(handle,&je);
		if ((ret == VPB_OK)&&(je.type != VPB_DIALEND)){
			if (option_verbose > 3){
					ast_verbose(VERBOSE_PREFIX_4 "Stop tone collected a wrong event!![%d]\n",je.type);
			}
/*			vpb_put_event(&je); */
		}
		vpb_sleep(10);
	}
}

/* Safe vpb_playtone_async */
static int playtone( int handle, VPB_TONE *tone)
{
	int ret=VPB_OK;
	stoptone(handle);
	if (option_verbose > 3) 
		ast_verbose(VERBOSE_PREFIX_4 "[%02d]: Playing tone\n", handle);
	ret = vpb_playtone_async(handle, tone);
	return ret;
}

static inline int monitor_handle_owned(struct vpb_pvt *p, VPB_EVENT *e)
{
	struct ast_frame f = {AST_FRAME_CONTROL}; /* default is control, Clear rest. */
	int endbridge = 0;
	int res=0;

	if (option_verbose > 3) 
		ast_verbose(VERBOSE_PREFIX_4 "%s: handle_owned: got event: [%d=>%d]\n", p->dev, e->type, e->data);

	f.src = "vpb";
	switch (e->type) {
		case VPB_RING:
			if (p->mode == MODE_FXO) {
				f.subclass = AST_CONTROL_RING;
				vpb_timer_stop(p->ring_timer);
				vpb_timer_start(p->ring_timer);
			} else
				f.frametype = -1; /* ignore ring on station port. */
			break;

		case VPB_RING_OFF:
			f.frametype = -1;
			break;

		case VPB_TIMEREXP:
			if (e->data == p->busy_timer_id) {
				playtone(p->handle,&Busytone);
				p->state = VPB_STATE_PLAYBUSY;
				vpb_timer_stop(p->busy_timer);
				vpb_timer_start(p->busy_timer);
				f.frametype = -1;
			} else if (e->data == p->ringback_timer_id) {
				playtone(p->handle, &Ringbacktone);
				vpb_timer_stop(p->ringback_timer);
				vpb_timer_start(p->ringback_timer);
				f.frametype = -1;
			} else if (e->data == p->ring_timer_id) {
				/* We didnt get another ring in time! */
				if (p->owner->_state != AST_STATE_UP)  {
					 /* Assume caller has hung up */
					vpb_timer_stop(p->ring_timer);
					f.subclass = AST_CONTROL_HANGUP;
				} else {
					vpb_timer_stop(p->ring_timer);
					f.frametype = -1;
				}
				
			} else {
				f.frametype = -1; /* Ignore. */
			}
			break;

		case VPB_DTMF_DOWN:
		case VPB_DTMF:
			if (use_ast_dtmfdet){
				f.frametype = -1;
			} else if (p->owner->_state == AST_STATE_UP) {
					f.frametype = AST_FRAME_DTMF;
					f.subclass = e->data;
			} else
				f.frametype = -1;
			break;

		case VPB_TONEDETECT:
			if (e->data == VPB_BUSY || e->data == VPB_BUSY_308 || e->data == VPB_BUSY_AUST ) {
				if (option_verbose > 3) 
					ast_verbose(VERBOSE_PREFIX_4 "%s: handle_owned: got event: BUSY\n", p->dev);
				if (p->owner->_state == AST_STATE_UP) {
					f.subclass = AST_CONTROL_HANGUP;
				}
				else {
					f.subclass = AST_CONTROL_BUSY;
				}
			} 
			else if (e->data == VPB_FAX){
				if (!p->faxhandled){
					if (strcmp(p->owner->exten, "fax")) {
						const char *target_context = S_OR(p->owner->macrocontext, p->owner->context);
						
						if (ast_exists_extension(p->owner, target_context, "fax", 1, p->owner->cid.cid_num)) {
							if (option_verbose > 2)
								ast_verbose(VERBOSE_PREFIX_3 "Redirecting %s to fax extension\n", p->owner->name);
							/* Save the DID/DNIS when we transfer the fax call to a "fax" extension */
							pbx_builtin_setvar_helper(p->owner, "FAXEXTEN", p->owner->exten);
							if (ast_async_goto(p->owner, target_context, "fax", 1))
								ast_log(LOG_WARNING, "Failed to async goto '%s' into fax of '%s'\n", p->owner->name, target_context);
						} else
							ast_log(LOG_NOTICE, "Fax detected, but no fax extension\n");
					} else
						ast_log(LOG_DEBUG, "Already in a fax extension, not redirecting\n");
				} else
					ast_log(LOG_DEBUG, "Fax already handled\n");

			} 
			else if (e->data == VPB_GRUNT) {
				if ( ast_tvdiff_ms(ast_tvnow(), p->lastgrunt) > gruntdetect_timeout ) {
					/* Nothing heard on line for a very long time
					 * Timeout connection */
					if (option_verbose > 2) 
						ast_verbose(VERBOSE_PREFIX_3 "grunt timeout\n");
					ast_log(LOG_NOTICE,"%s: Line hangup due of lack of conversation\n",p->dev); 
					f.subclass = AST_CONTROL_HANGUP;
				} else {
					p->lastgrunt = ast_tvnow();
					f.frametype = -1;
				}
			} 
			else {
				f.frametype = -1;
			}
			break;

		case VPB_CALLEND:
			#ifdef DIAL_WITH_CALL_PROGRESS
			if (e->data == VPB_CALL_CONNECTED) 
				f.subclass = AST_CONTROL_ANSWER;
			else if (e->data == VPB_CALL_NO_DIAL_TONE || e->data == VPB_CALL_NO_RING_BACK)
				f.subclass =  AST_CONTROL_CONGESTION;
			else if (e->data == VPB_CALL_NO_ANSWER || e->data == VPB_CALL_BUSY)
				f.subclass = AST_CONTROL_BUSY;
			else if (e->data  == VPB_CALL_DISCONNECTED) 
				f.subclass = AST_CONTROL_HANGUP;
			#else
			ast_log(LOG_NOTICE,"%s: Got call progress callback but blind dialing \n", p->dev); 
			f.frametype = -1;
			#endif
			break;

		case VPB_STATION_OFFHOOK:
			f.subclass = AST_CONTROL_ANSWER;
			break;

		case VPB_DROP:
			if ((p->mode == MODE_FXO)&&(UseLoopDrop)){ /* ignore loop drop on stations */
				if (p->owner->_state == AST_STATE_UP) 
					f.subclass = AST_CONTROL_HANGUP;
				else
					f.frametype = -1;
			}
			break;
		case VPB_LOOP_ONHOOK:
			if (p->owner->_state == AST_STATE_UP)
				f.subclass = AST_CONTROL_HANGUP;
			else
				f.frametype = -1;
			break;
		case VPB_STATION_ONHOOK:
			f.subclass = AST_CONTROL_HANGUP;
			break;

		case VPB_STATION_FLASH:
			f.subclass = AST_CONTROL_FLASH;