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/*
* AlsaLibMapping -- provide low level interface with AUDIO 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 SHAREHALLIB_H
#define SHAREHALLIB_H
#include <stdio.h>
#include <alsa/asoundlib.h>
#include "audio-interface.h"
#include <systemd/sd-event.h>
typedef enum {
ACTION_SET,
ACTION_GET
} ActionSetGetT;
// VolRamp Handle Store current status for a given VolRam CB set
typedef struct {
halRampEnumT mode;
halCtlsTagT slave;
int delay; // delay between volset in us
int stepDown; // linear %
int stepUp; // linear %
int current; // current volume for slave ctl
int target; // target volume
sd_event_source *evtsrc; // event loop timer source
} halVolRampT;
typedef struct {
int min;
int max;
int step;
int mute;
} alsaHalDBscaleT;
typedef struct {
char* name;
int numid;
snd_ctl_elem_type_t type;
int count;
int minval;
int maxval;
int value;
int step;
const char **enums;
alsaHalDBscaleT *dbscale;
} alsaHalCtlMapT;
// avoid compiler warning [Jose does not like typedef :) ]
typedef struct afb_service alsaHalServiceT;
typedef struct {
void (*callback)(halCtlsTagT tag, alsaHalCtlMapT *control, void* handle, json_object *valuesJ);
void* handle;
} alsaHalCbMapT;
typedef struct {
halCtlsTagT tag;
const char *label;
alsaHalCtlMapT ctl;
alsaHalCbMapT cb;
char* info;
} alsaHalMapT;
typedef struct {
const char *name;
const char *info;
alsaHalMapT *ctls;
const char *devid;
json_object* (*volumeCB)(ActionSetGetT action, const alsaHalCtlMapT *halCtls, json_object *valuesJ);
} alsaHalSndCardT;
// hal-interface.c
extern afb_verb_v2 halServiceApi[];
PUBLIC void halServiceEvent(const char *evtname, json_object *object);
PUBLIC int halServiceInit(const char *apiPrefix, alsaHalSndCardT *alsaHalSndCard);
PUBLIC json_object *halGetCtlByTag(halRampEnumT tag);
PUBLIC int halSetCtlByTag(halRampEnumT tag, int value);
// hal-volramp.c
PUBLIC void volumeRamp(halCtlsTagT halTag, alsaHalCtlMapT *control, void* handle, json_object *valJ);
// hal-volume.c
PUBLIC json_object *volumeNormalise(ActionSetGetT action, const alsaHalCtlMapT *halCtls, json_object *valuesJ);
#endif /* SHAREHALLIB_H */
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