/*
 * 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-common.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 = "PCM Playback Volume"}},
    { .tag = PCM_Playback_Switch, .ctl =
        { .name = "Master Playback Switch"}},
    { .tag = Capture_Volume, .ctl =
        { .name = "Capture Volume"}},

    { .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 = "HDA Intel PCH", //  WARNING: name MUST match with 'aplay -l'
    .info = "Hardware Abstraction Layer for IntelHDA sound card",
    .ctls = alsaHalMap,
};

STATIC int sndServiceInit() {
    int err;
    AFB_DEBUG("IntelHal 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 = "intel-hda",
    .init = sndServiceInit,
    .verbs = halServiceApi,
    .onevent = halServiceEvent,
};