/*
* Copyright (C) 2010-2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO 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 the GNU General Public License
* along with DOUBANGO.
*
*/

/**@file tmedia_qos.h
 * @brief RFC 3312 (Preconditions) implementation.
 *
 * @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
 *

 */
#ifndef TINYMEDIA_QOS_H
#define TINYMEDIA_QOS_H

#include "tinymedia_config.h"

#include "tinysdp/tsdp_message.h"

#include "tsk_object.h"

TMEDIA_BEGIN_DECLS

#define TMEDIA_QOS_TLINE(self) ((tmedia_qos_tline_t*)(self))

/** List of all supported statues*/
typedef enum tmedia_qos_status_e {
    //! current-status
    tmedia_qos_status_curr,
    //! desired-status
    tmedia_qos_status_des,
    //! confirm-status
    tmedia_qos_status_conf
}
tmedia_qos_status_t;

/** List of all supported precondition types */
typedef enum tmedia_qos_ptype_e {
    tmedia_qos_ptype_qos
}
tmedia_qos_ptype_t;

/** List of all supported status types */
typedef enum tmedia_qos_stype_e {
    tmedia_qos_stype_none,/* not part of the RFC */

    tmedia_qos_stype_segmented,
    tmedia_qos_stype_e2e,
}
tmedia_qos_stype_t;

/** strengths */
typedef enum tmedia_qos_strength_e {
    /* do no change the order (none -> optional -> manadatory) */
    tmedia_qos_strength_none,
    tmedia_qos_strength_failure,
    tmedia_qos_strength_unknown,
    tmedia_qos_strength_optional,
    tmedia_qos_strength_mandatory
}
tmedia_qos_strength_t;

/** directions */
typedef enum tmedia_qos_direction_e {
    tmedia_qos_direction_none = 0x01,
    tmedia_qos_direction_send = (0x01 << 1),
    tmedia_qos_direction_recv = (0x01 << 2),
    tmedia_qos_direction_sendrecv = (tmedia_qos_direction_send | tmedia_qos_direction_recv)
}
tmedia_qos_direction_t;

/* QoS table-line */
typedef struct tmedia_qos_tline_s {
    TSK_DECLARE_OBJECT;
    tmedia_qos_stype_t type;
}
tmedia_qos_tline_t;
#define TMEDIA_DECLARE_QOS_TLINE tmedia_qos_tline_t __tline__

TINYMEDIA_API tmedia_qos_tline_t* tmedia_qos_tline_create(tmedia_qos_stype_t type, tmedia_qos_strength_t strength);
TINYMEDIA_API tmedia_qos_stype_t tmedia_qos_get_type(const tsdp_header_M_t* m);
TINYMEDIA_API tmedia_qos_tline_t* tmedia_qos_tline_from_sdp(const tsdp_header_M_t* m);
TINYMEDIA_API int tmedia_qos_tline_to_sdp(const tmedia_qos_tline_t* self, tsdp_header_M_t* m);
TINYMEDIA_API int tmedia_qos_tline_set_ro(tmedia_qos_tline_t* self, const tmedia_qos_tline_t* ro);
TINYMEDIA_API tsk_bool_t tmedia_qos_tline_canresume(const tmedia_qos_tline_t* self);

/* QoS table-line for E2E type*/
typedef struct tmedia_qos_tline_e2e_s {
    TMEDIA_DECLARE_QOS_TLINE;

    /* RFC 3312 - 5.1 Generating an offer

    	Direction  Current  Desired Strength
    	____________________________________
    	send       no        mandatory
    	recv       no        mandatory
    */
    struct {
        unsigned current:1;
        unsigned confirm:1;
        tmedia_qos_strength_t strength;
    } send;

    struct {
        unsigned current:1;
        unsigned confirm:1;
        tmedia_qos_strength_t strength;
    } recv;
}
tmedia_qos_tline_e2e_t;

TINYMEDIA_API tmedia_qos_tline_e2e_t* tmedia_qos_tline_e2e_create(tmedia_qos_strength_t strength);
TINYMEDIA_API tmedia_qos_tline_e2e_t* tmedia_qos_tline_e2e_from_sdp(const tsdp_header_M_t* m);
TINYMEDIA_API int tmedia_qos_tline_e2e_to_sdp(const tmedia_qos_tline_e2e_t* self, tsdp_header_M_t* m);
TINYMEDIA_API int tmedia_qos_tline_e2e_set_ro(tmedia_qos_tline_e2e_t* self, const tmedia_qos_tline_e2e_t* ro);
TINYMEDIA_API tsk_bool_t tmedia_qos_tline_e2e_canresume(const tmedia_qos_tline_e2e_t* self);

/* QoS table-line for Segented type*/
typedef struct tmedia_qos_tline_segmented_s {
    TMEDIA_DECLARE_QOS_TLINE;

    /* RFC 3312 - 5.1 Generating an offer
    	Direction   Current  Desired Strength
    	______________________________________
    	local send     no           none
    	local recv     no           none
    	remote send    no         optional
    	remote recv    no           none
    */
    /* can be done in two lines but I prefer doing it like this (easier) */
    struct {
        unsigned current:1;
        unsigned confirm:1;
        tmedia_qos_strength_t strength;
    } local_send;

    struct {
        unsigned current:1;
        unsigned confirm:1;
        tmedia_qos_strength_t strength;
    } local_recv;

    struct {
        unsigned current:1;
        unsigned confirm:1;
        tmedia_qos_strength_t strength;
    } remote_send;

    struct {
        unsigned current:1;
        unsigned confirm:1;
        tmedia_qos_strength_t strength;
    } remote_recv;
}
tmedia_qos_tline_segmented_t;


TINYMEDIA_API tmedia_qos_tline_segmented_t* tmedia_qos_tline_segmented_create(tmedia_qos_strength_t strength);
TINYMEDIA_API tmedia_qos_tline_segmented_t* tmedia_qos_tline_segmented_from_sdp(const tsdp_header_M_t* m);
TINYMEDIA_API int tmedia_qos_tline_segmented_to_sdp(const tmedia_qos_tline_segmented_t* self, tsdp_header_M_t* m);
TINYMEDIA_API int tmedia_qos_tline_segmented_set_ro(tmedia_qos_tline_segmented_t* self, const tmedia_qos_tline_segmented_t* ro);
TINYMEDIA_API tsk_bool_t tmedia_qos_tline_segmented_canresume(const tmedia_qos_tline_segmented_t* self);

TINYMEDIA_GEXTERN const tsk_object_def_t *tmedia_qos_tline_segmented_def_t;
TINYMEDIA_GEXTERN const tsk_object_def_t *tmedia_qos_tline_e2e_def_t;

TMEDIA_END_DECLS

#endif /* TINYMEDIA_QOS_H */