/*
 * AlsaLibMapping -- provide low level interface with ALSA lib (extracted from alsa-json-gateway code)
 * Copyright (C) 2015,2016,2017, Fulup Ar Foll fulup@iot.bzh
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


#ifndef ALSALIBMAPPING_H
#define ALSALIBMAPPING_H


#include <alsa/asoundlib.h>
#include <systemd/sd-event.h>

#include <afb/afb-binding.h>
#include <json-c/json.h>

// Soft control have dynamically allocated numid
#define CTL_AUTO    -1
#define CTL_UNKNOWN -2

#ifndef PUBLIC
  #define PUBLIC
#endif
#define STATIC static

#ifndef CONTROL_MAXPATH_LEN
  #define CONTROL_MAXPATH_LEN   255
#endif

#define NO_CARD_SELECTED        -1
#define NO_DEVICE_SELECTED      -1
#define NO_SUBDEVICE_SELECTED   -1

typedef enum {
    QUERY_QUIET   = 0,
    QUERY_COMPACT = 1,
    QUERY_VERBOSE = 2,
    QUERY_FULL    = 3,
} queryModeE;

typedef enum {
    ACTION_SET,
    ACTION_GET
} ActionSetGetT;

typedef enum {
    CONTROL_ADD,
    CONTROL_REMOVE
} ControlAddRemoveT;

typedef enum {
    EVENT_SUBSCRIBE,
    EVENT_UNSUBSCRIBE
} EventSubscribeUnsubscribeT;

// structure to store card
typedef struct {
    int cardNb;
    char *cardPath;
    char *cardId;
    char *cardShortName;
    char *cardLongName;
    char *cardDriver;
    char *cardMixerName;
    char *cardComponents;
    int playbackDeviceNb;
    char *playbackDeviceId;
    char *playbackDeviceName;
} queryCardInfo;

// generic structure to pass parsed query values
typedef struct {
    json_object *numidsJ;
    int count;
} controlQueryValuesT;

// use to store crl numid user request
typedef struct {
    unsigned int numId;
    const char *tag;
    json_object *jToken;
    json_object *valuesJ;
    int used;
} ctlRequestT;

// import from AlsaAfbBinding
extern const struct afb_binding_interface *afbIface;
PUBLIC char *alsaGetDevIdFromQuery(json_object *queryJ);
PUBLIC queryModeE alsaGetModeFromQuery(json_object *queryJ);

// AlseCoreSetGet exports
PUBLIC int getCardNbFromCardPath(char *cardPath);
PUBLIC json_object *getCardInfo(int card);
PUBLIC void alsaGetInfo (afb_req_t request);
PUBLIC int alsaGetPcmProcStatusFd(unsigned int card, unsigned int device, unsigned int subdevice, snd_pcm_stream_t pcmStream);
PUBLIC int alsaIsPcmAvailableUsingPcmProcFd(int fd);
PUBLIC int alsaIsPcmAvailableUsingId(unsigned int card, unsigned int device, unsigned int subdevice, snd_pcm_stream_t pcmStream);
PUBLIC int alsaIsPcmAvailableUsingPcmName(char *pcmName, snd_pcm_stream_t pcmStream);
PUBLIC void alsaGetPcmAvailability(afb_req_t request);
PUBLIC int alsaGetSingleCtl (snd_ctl_t *ctlDev, snd_ctl_elem_id_t *elemId, ctlRequestT *ctlRequest, queryModeE queryMode);
PUBLIC void alsaGetCtls(afb_req_t request);
PUBLIC void alsaSetCtls(afb_req_t request);


// AlsaUseCase exports
PUBLIC void alsaUseCaseQuery(afb_req_t request);
PUBLIC void alsaUseCaseSet(afb_req_t request);
PUBLIC void alsaUseCaseGet(afb_req_t request);
PUBLIC void alsaUseCaseClose(afb_req_t request);
PUBLIC void alsaUseCaseReset(afb_req_t request);
PUBLIC void alsaAddCustomCtls(afb_req_t request);
PUBLIC void alsaRemoveCustomCtls(afb_req_t request);

// AlsaRegEvt
PUBLIC void alsaEvtSubscribe (afb_req_t request);
PUBLIC void alsaEvtUnsubscribe (afb_req_t request);
PUBLIC void alsaGetCardId (afb_req_t request);
PUBLIC void alsaRegisterHal (afb_req_t request);
PUBLIC void alsaActiveHal (afb_req_t request);
PUBLIC void alsaPcmInfo (afb_req_t request);

#endif /* ALSALIBMAPPING_H */