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/*
 * libmostvolume example
 *
 * Copyright (C) 2017 Microchip Technology Germany II GmbH & Co. KG
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * You may also obtain this software under a propriety license from Microchip.
 * Please contact Microchip for further information.
 *
 */

#ifndef LIB_MOST_VOLUME_H
#define	LIB_MOST_VOLUME_H

#include "ucs_api.h"

#ifdef	__cplusplus
extern "C" {
#endif
    
/** Describes the volume control */
enum lib_most_volume_channel_t{
    LIB_MOST_VOLUME_CH_FRONT_LEFT   = 0,
    LIB_MOST_VOLUME_CH_FRONT_RIGHT  = 1,
    LIB_MOST_VOLUME_CH_REAR_LEFT    = 2,
    LIB_MOST_VOLUME_CH_REAR_RIGHT   = 3,
    LIB_MOST_VOLUME_CH_CENTER       = 4,
    LIB_MOST_VOLUME_CH_SUB          = 5,
    LIB_MOST_VOLUME_MASTER          = 6
};

/** Is fired when the application shall call "lib_most_volume_service()" after a certain time
  * \param timeout  Time in ms after which the application shall call lib_most_volume_service().
  *                 Valid values:
  *                 0x0000: as soon as possible,
  *                 0x0001..0xFFFE: timeout in ms, 
  *                 0xFFFF: never
  */
typedef void (*lib_most_volume_service_cb_t)(uint16_t timeout);

/** Initializes the library
  * \param   unicens_inst       Reference to the UNICENS instance, created by the application.
  * \param   req_service_fptr   Callback function which is fired if the application shall call 
  *                             lib_most_volume_service.
  * \return  '0' on success, otherwise value >'0'.  
  */
extern uint8_t lib_most_volume_init(Ucs_Inst_t *unicens_inst, lib_most_volume_service_cb_t req_service_fptr);

/** Terminates the library
  * \return  '0' on success, otherwise value >'0'.
  */
extern uint8_t lib_most_volume_exit(void);

/** Sets a single volume value.
  * \param   channel        The volume control to be set.
  * \param   volume         The volume value to be set. Valid values: 0..255.
  * \return  '0' on success, otherwise value >'0'.
  */
extern uint8_t lib_most_volume_set(enum lib_most_volume_channel_t channel, uint8_t volume);

/** Shall be called either cyclically (e.g. 50ms -> polling) or after "timeout" 
  * when "service_fptr" is fired (-> event triggered).
  * \return  '0' on success, otherwise value >'0'.
  */ 
extern uint8_t lib_most_volume_service(void);

#ifdef	__cplusplus
}
#endif

#endif	/* LIB_MOST_VOLUME_H */