/*
   Copyright (C) 2010 bg <bg_one@mail.ru>
*/
#ifndef CHAN_DONGLE_CPVT_H_INCLUDED
#define CHAN_DONGLE_CPVT_H_INCLUDED

#include "ast_config.h"

#include <asterisk/linkedlists.h>		/* AST_LIST_ENTRY() */
#include <asterisk/frame.h>			/* AST_FRIENDLY_OFFSET */

#include "export.h"				/* EXPORT_DECL EXPORT_DEF */
#include "mixbuffer.h"				/* struct mixstream */
#include "mutils.h"				/* enum2str() ITEMS_OF() */

#define FRAME_SIZE		320

typedef enum {
	CALL_STATE_MIN		= 0,

/* values from CLCC */
	CALL_STATE_ACTIVE	= CALL_STATE_MIN,		/*!< comes from CLCC */
	CALL_STATE_ONHOLD,					/*!< comes from CLCC */
	CALL_STATE_DIALING,					/*!< comes from CLCC */
	CALL_STATE_ALERTING,					/*!< comes from CLCC */
	CALL_STATE_INCOMING,					/*!< comes from CLCC */
	CALL_STATE_WAITING,					/*!< comes from CLCC */

	CALL_STATE_RELEASED,					/*!< on CEND or channel_hangup() called */
	CALL_STATE_INIT,					/*!< channel_call() called */
	CALL_STATE_MAX		= CALL_STATE_INIT
} call_state_t;
#define CALL_STATES_NUMBER	(CALL_STATE_MAX - CALL_STATE_MIN + 1)

typedef enum {
	CALL_FLAG_NONE		= 0,
	CALL_FLAG_HOLD_OTHER	= 1,				/*!< external, from channel_call() hold other calls and dial this number */
	CALL_FLAG_NEED_HANGUP	= 2,				/*!< internal, require issue AT+CHUP or AT+CHLD=1x for call */
	CALL_FLAG_ACTIVATED	= 4,				/*!< internal, fd attached to channel fds list */
	CALL_FLAG_ALIVE		= 8,				/*!< internal, temporary, still listed in CLCC */
	CALL_FLAG_CONFERENCE	= 16,				/*!< external, from dial() begin conference after activate this call */
	CALL_FLAG_MASTER	= 32,				/*!< internal, channel fd[0] is pvt->audio_fd and  fd[1] is timer fd */
	CALL_FLAG_BRIDGE_LOOP	= 64,				/*!< internal, found channel bridged to channel on same device */
	CALL_FLAG_BRIDGE_CHECK	= 128,				/*!< internal, we already do check for bridge loop */
	CALL_FLAG_MULTIPARTY	= 256,				/*!< internal, CLCC mpty is 1 */
} call_flag_t;


/* */
typedef struct cpvt {
	AST_LIST_ENTRY (cpvt)	entry;				/*!< linked list pointers */

	struct ast_channel*	channel;			/*!< Channel pointer */
	struct pvt		*pvt;				/*!< pointer to device structure */

	short			call_idx;			/*!< device call ID */
#define MIN_CALL_IDX		0
#define MAX_CALL_IDX		31

	call_state_t		state;				/*!< see also call_state_t */
	int			flags;				/*!< see also call_flag_t */

/* TODO: join with flags */
	unsigned int		dir:1;				/*!< call direction */
#define CALL_DIR_OUTGOING	0
#define CALL_DIR_INCOMING	1

	int			rd_pipe[2];			/*!< pipe for split read from device */
#define PIPE_READ		0
#define PIPE_WRITE		1

	struct mixstream	mixstream;			/*!< mix stream */
	char			a_read_buf[FRAME_SIZE + AST_FRIENDLY_OFFSET];/*!< audio read buffer */
	struct ast_frame	a_read_frame;			/*!< read frame buffer */

//	size_t			write;				/*!< write position in pvt->a_write_buf */
//	size_t			used;				/*!< bytes used in pvt->a_write_buf */
//	char			a_write_buf[FRAME_SIZE * 5];	/*!< audio write buffer */
//	struct ringbuffer	a_write_rb;			/*!< audio ring buffer */
} cpvt_t;

#define CPVT_SET_FLAGS(cpvt, flag)	do { (cpvt)->flags |= (flag); } while(0)
#define CPVT_RESET_FLAGS(cpvt, flag)	do { (cpvt)->flags &= ~((int)flag); } while(0)
#define CPVT_TEST_FLAG(cpvt, flag)	((cpvt)->flags & (flag))
#define CPVT_TEST_FLAGS(cpvt, flag)	(((cpvt)->flags & (flag)) == (flag))

#define CPVT_IS_MASTER(cpvt)		CPVT_TEST_FLAG(cpvt, CALL_FLAG_MASTER)
#define CPVT_IS_ACTIVE(cpvt)		((cpvt)->state == CALL_STATE_ACTIVE)
#define CPVT_IS_SOUND_SOURCE(cpvt)	((cpvt)->state == CALL_STATE_ACTIVE || (cpvt)->state == CALL_STATE_DIALING || (cpvt)->state == CALL_STATE_ALERTING)


EXPORT_DECL struct cpvt * cpvt_alloc(struct pvt * pvt, int call_idx, unsigned dir, call_state_t statem);
EXPORT_DECL void cpvt_free(struct cpvt* cpvt);

EXPORT_DECL struct cpvt * pvt_find_cpvt(struct pvt * pvt, int call_idx);
EXPORT_DECL const char * pvt_call_dir(const struct pvt * pvt);

#/* */
INLINE_DECL const char * call_state2str(call_state_t state)
{
	static const char * const states[] = {
	/* real device states */
		"active",
		"held",
		"dialing",
		"alerting",
		"incoming",
		"waiting",

	/* pseudo states */
		"released",
		"initialize"
	};

	return enum2str(state, states, ITEMS_OF(states));
}

#endif /* CHAN_DONGLE_CPVT_H_INCLUDED */