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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:USB controls # get supported controls
* amixer -Dhw:USB cget name=Power-Switch
* amixer -Dhw:USB cset name=Power-Switch true
*
*/
#define _GNU_SOURCE
#include "hal-interface.h"
#include "audio-interface.h"
// Default Values for MasterVolume Ramping
STATIC halVolRampT volRampMaster= {
.mode = RAMP_VOL_NORMAL,
.slave = Master_Playback_Volume,
.delay = 100*1000, // ramping delay in us
.stepDown=1,
.stepUp =1,
};
// Map HAL hight sndctl with Alsa numid and optionally with a custom callback for non Alsa supported functionalities.
STATIC alsaHalMapT alsaHalMap[]= {
{ .tag=Master_Playback_Volume, . ctl={.name="Master Playback Volume" } },
{ .tag=PCM_Playback_Volume , .ctl={.name="Master 1 (Monitor) Playback Volume" } },
{ .tag=PCM_Playback_Switch , .ctl={.numid=05 } },
{ .tag=Capture_Volume , .ctl={.numid=12 } },
{ .tag=Vol_Ramp_Set_Mode , .cb={.callback=volumeRamp, .handle=&volRampMaster}, .info="select volramp speed",
.ctl={.numid=0, .type=SND_CTL_ELEM_TYPE_ENUMERATED, .count=1, .value=RAMP_VOL_NORMAL, .name="Hal-VolRamp-Mode", .enums=halVolRampModes}
},
{ .tag=Vol_Ramp_Set_Slave , .cb={.callback=volumeRamp, .handle=&volRampMaster}, .info="set slave volume master numid",
.ctl={.numid=0, .type=SND_CTL_ELEM_TYPE_INTEGER, .count=1, .value=Master_Playback_Volume, .name="Hal-VolRamp-Slave", .enums=halVolRampModes}
},
{ .tag=Vol_Ramp_Set_Delay , .cb={.callback=volumeRamp, .handle=&volRampMaster}, .info="set ramp delay [default 250ms]",
.ctl={.numid=0, .type=SND_CTL_ELEM_TYPE_INTEGER, .count=1, .minval=0, .maxval=1000, .step=100, .value=250, .name="Hal-VolRamp-Step-Down"}
},
{ .tag=Vol_Ramp_Set_Down , .cb={.callback=volumeRamp, .handle=&volRampMaster}, .info="set linear step down ramp [default 10]",
.ctl={.numid=0, .type=SND_CTL_ELEM_TYPE_INTEGER, .count=1, .minval=0, .maxval=100, .step=1, .value=10, .name="Hal-VolRamp-Step-Down"}
},
{ .tag=Vol_Ramp_Set_Up , .cb={.callback=volumeRamp, .handle=&volRampMaster}, .info="set linear step up ramp [default 10]",
.ctl={.numid=0, .type=SND_CTL_ELEM_TYPE_INTEGER, .count=1, .minval=0, .maxval=100, .step=1, .value=10, .name="Hal-VolRamp-Step-Up"}
},
{ .tag=Master_Playback_Volume , .cb={.callback=volumeRamp, .handle=&volRampMaster}, .info="ramp volume linearly according to current ramp setting",
.ctl={.numid=0, .type=SND_CTL_ELEM_TYPE_INTEGER, .count=1, .minval=0, .maxval=100, .step=1, .name="Hal-VolRamp"}
},
{ .tag=EndHalCrlTag} /* 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,
.volumeCB = NULL, // use default volume normalisation function
};
STATIC int sndServiceInit () {
int err;
AFB_DEBUG ("Scarlett Binding 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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