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/*
* Copyright (C) 2016 "IoT.bzh"
* Author 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.
*
*
* To find out which control your sound card uses
* aplay -l # Check sndcard name name in between []
* amixer -D hw:xx controls # get supported controls
* amixer -D "hw:3" cget numid=xx # get control settings
*
*/
#define _GNU_SOURCE
#include "hal-interface.h"
#include "audio-interface.h"
STATIC struct json_object* MasterOnOff (alsaHalCtlMapT *control, void* handle) {
static int powerStatus=0;
if (! powerStatus) {
powerStatus = 1;
AFB_DEBUG ("Power Set to On");
} else {
powerStatus = 0;
AFB_DEBUG ("Power Set to Off");
}
return NULL;
}
// Map HAL hight sndctl with Alsa numid and optionally with a custom callback for non Alsa supported functionalities.
STATIC alsaHalMapT alsaHalMap[]= {
{ .alsa={.control=Master_Playback_Volume,.numid=16, .name="Master-Vol" , .values=1,.minval=0,.maxval= 87 ,.step=0}, .info= "Master Playback Volume" },
{ .alsa={.control=PCM_Playback_Volume ,.numid=27, .name="Play-Vol" , .values=2,.minval=0,.maxval= 255,.step=0}, .info= "PCM Playback Volume" },
{ .alsa={.control=PCM_Playback_Switch ,.numid=17, .name="Play-Switch" , .values=1,.minval=0,.maxval= 1 ,.step=0}, .info= "Master Playback Switch" },
{ .alsa={.control=Capture_Volume ,.numid=12, .name="Capt-vol" , .values=2,.minval=0,.maxval= 31 ,.step=0}, .info= "Capture Volume" },
{ .alsa={.control=Master_OnOff_Switch ,.numid=99, .name="Power-Switch"}, .cb={.callback=MasterOnOff, .handle=NULL}, .info= "OnOff Global Switch"},
{ .alsa={.numid=0}, .cb={.callback=NULL, .handle=NULL}} /* marker for end of the array */
} ;
// HAL sound card mapping info
STATIC alsaHalSndCardT alsaHalSndCard = {
.name = "Scarlett 18i8 USB", // WARNING: name MUST match with 'aplay -l'
.info = "Hardware Abstraction Layer for Scarlett Focusrite USB professional music sound card",
.ctls = alsaHalMap,
};
STATIC int sndServiceInit () {
int err;
AFB_DEBUG ("IntelHalBinding Init");
err = halServiceInit (afbBindingV2.api, &alsaHalSndCard);
return err;
}
// API prefix should be unique for each snd card
PUBLIC const struct afb_binding_v2 afbBindingV2 = {
.api = "scarlett-usb",
.init = sndServiceInit,
.verbs = halServiceApi,
.onevent = halServiceEvent,
};
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