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/*
* Copyright (C) 2018, "IoT.bzh", Microchip Technology Inc. and its subsidiaries.
* Author Jonathan Aillet
* Author Tobias Jahnke
* Contrib Fulup Ar Foll
*
* 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.
*
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <pthread.h>
#include <wrap-json.h>
#include <ctl-plugin.h>
#include <ctl-config.h>
#include "wrap_unicens.h"
#include "wrap_volume.h"
#define PCM_MAX_CHANNELS 6
#define UCS_PLUGIN_NAME "hal-unicens"
CTLP_CAPI_REGISTER(UCS_PLUGIN_NAME)
AFB_ApiT unicensHalApiHandle;
static uint8_t initialized = 0;
/* Call at initialization time, binder is not running yet,
* communication to other bindings not possible now. */
CTLP_ONLOAD(plugin, callbacks)
{
unicensHalApiHandle = plugin->api;
AFB_ApiNotice(unicensHalApiHandle, "4A-HAL-UNICENS: Plugin Register: uid='%s' 'info='%s'", plugin->uid, plugin->info);
return 0;
}
/* initializes ALSA sound card, UNICENS API */
CTLP_CAPI(Init, source, argsJ, queryJ)
{
int err = 0;
int pcm_volume[PCM_MAX_CHANNELS] = { 100, 100, 100, 100, 100, 100 };
AFB_ApiNotice(source->api, "4A-HAL-UNICENS: Initializing 4a plugin");
if((err = wrap_volume_init())) {
AFB_ApiError(source->api, "Failed to initialize wrapper for volume library");
goto Abort_Exit;
}
if((err = wrap_ucs_subscribe_sync(source->api))) {
AFB_ApiError(source->api, "Failed to subscribe to UNICENS binding");
goto Abort_Exit;
}
// Set output volume to pre-defined level in order to
// avoid muted volume to be persistent after boot.
//wrap_volume_master(source->api, 80);
wrap_volume_pcm(source->api, pcm_volume, PCM_MAX_CHANNELS);
initialized = 1;
Abort_Exit:
AFB_ApiNotice(source->api, "4A-HAL-UNICENS: Initializing plugin done, err=%d", err);
err = 0; /* avoid returning non-zero value, to force loading the plugin */
return err;
}
/* Is called when master volume is incremented by ALSA */
CTLP_CAPI(MasterVol, source, argsJ, queryJ)
{
int master_volume;
json_object *valueJ;
int err = 0;
AFB_ApiNotice(source->api, "4A-HAL-UNICENS: MasterVolume=%s", json_object_to_json_string(queryJ));
if(! initialized) {
AFB_ApiWarning(source->api, "%s: Link to unicens binder is not initialized, can't set master volume, value=%s", __func__, json_object_get_string(queryJ));
err = -1;
goto Abort_Exit;
}
if(! json_object_is_type(queryJ, json_type_array) || json_object_array_length(queryJ) <= 0) {
AFB_ApiError(source->api, "%s: invalid json (should be a non empty json array) value=%s", __func__, json_object_get_string(queryJ));
err = -2;
goto Abort_Exit;
}
valueJ = json_object_array_get_idx(queryJ, 0);
if(! json_object_is_type(valueJ, json_type_int)) {
AFB_ApiError(source->api, "%s: invalid json (should be an array of int) value=%s", __func__, json_object_get_string(queryJ));
err = -3;
goto Abort_Exit;
}
master_volume = json_object_get_int(valueJ);
wrap_volume_master(source->api, master_volume);
Abort_Exit:
err = 0; /* avoid returning non-zero value, to force loading the plugin */
return err;
}
/* not used at the moment, disabled in JSON configuration */
CTLP_CAPI(PCMVol, source, argsJ, queryJ)
{
AFB_ApiNotice(source->api, "4A-HAL-UNICENS: PCMVolume=%s", json_object_to_json_string(queryJ));
return 0;
}
/* Is called on UNICENS events */
CTLP_CAPI(Events, source, argsJ, queryJ)
{
uint16_t node = 0U;
bool available = false;
int err = 0;
json_object *j_tmp = NULL;
AFB_ApiError(source->api, "4A-HAL-UNICENS: receiving event query=%s", json_object_to_json_string(queryJ));
if (initialized == 0) {
AFB_ApiError(source->api, "4A-HAL-UNICENS: Not initialized while receiving event query=%s", json_object_to_json_string(queryJ));
err = 0;
goto Abort_Exit;
}
if (json_object_object_get_ex(queryJ, "node", &j_tmp)) {
node = (uint16_t)json_object_get_int(j_tmp);
}
else {
err = -1;
}
if (json_object_object_get_ex(queryJ, "available", &j_tmp)) {
available = (bool)json_object_get_boolean(j_tmp);
}
else {
err = -2;
}
if(err == 0) {
AFB_ApiNotice(source->api, "4A-HAL-UNICENS: Node-Availability: node=0x%03X, available=%d", node, available);
wrap_volume_node_avail(source->api, node, available);
}
else {
AFB_ApiError(source->api, "4A-HAL-UNICENS: Failed to parse events query=%s", json_object_to_json_string(queryJ));
}
Abort_Exit:
err = 0; /* avoid returning non-zero value now */
return err;
}
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