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/*
* 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 int alsaGetSingleCtl (snd_ctl_t *ctlDev, snd_ctl_elem_id_t *elemId, ctlRequestT *ctlRequest, queryModeE queryMode);
PUBLIC void alsaGetInfo (afb_req_t request);
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 */
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