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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.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <netdb.h>
#include <fcntl.h>
#include <math.h>
#include <sys/time.h>
#include <sys/types.h>
#include "AudioLogicLib.h"
static struct afb_service srvitf;
PUBLIC void audioLogicSetVol(struct afb_req request) {
const char *vol = afb_req_value(request, "vol");
if (vol == NULL) {
afb_req_fail_f (request, "argument-missing", "vol=+-%[0,100] missing");
goto ExitOnError;
}
switch (vol[0]) {
case '+':
break;
case '-':
break;
case '%':
break;
default:
afb_req_fail_f (request, "value-invalid", "volume should be (+-%[0-100]xxx) vol=%s", vol);
goto ExitOnError;
}
// Should call here Hardware Alsa Abstraction Layer for corresponding Sound Card
afb_req_success (request, NULL, NULL);
return;
ExitOnError:
return;
}
// This callback is fired when afb_service_call for api/alsacore/subctl returns
STATIC void alsaSubcribeCB (void *handle, int iserror, struct json_object *result) {
struct afb_req request = afb_req_unstore(handle);
struct json_object *x, *resp = NULL;
const char *info = NULL;
if (result) {
INFO (afbIface, "result=[%s]\n", json_object_to_json_string (result));
if (json_object_object_get_ex(result, "request", &x) && json_object_object_get_ex(x, "info", &x))
info = json_object_get_string(x);
if (!json_object_object_get_ex(result, "response", &resp)) resp = NULL;
}
// push message respond
if (iserror) afb_req_fail_f(request, "Fail", info);
else afb_req_success(request, resp, info);
}
// Create and subscribe to alsacore ctl events
PUBLIC void audioLogicMonitor(struct afb_req request) {
// keep request for callback to respond
struct afb_req *handle = afb_req_store(request);
// get client context
AudioLogicCtxT *ctx = afb_req_context_get(request);
// push request to low level binding
NOTICE (afbIface, "audioLogicMonitor ctx->devid=%s [ctx->queryurl=%s]", ctx->devid, json_object_to_json_string(ctx->queryurl));
if (ctx->queryurl) {
json_object_get (ctx->queryurl); // Make sure usage count does not fall to zero
afb_service_call(srvitf, "alsacore", "subscribe", ctx->queryurl, alsaSubcribeCB, handle);
}
else afb_req_fail_f(request, "context-invalid", "No valid queryurl in client context");
// success/failure messages return from callback
}
// Subscribe to AudioBinding events
PUBLIC void audioLogicSubscribe (struct afb_req request) {
return;
}
// Call when all bindings are loaded and ready to accept request
PUBLIC void audioLogicGetVol(struct afb_req request) {
// Should call here Hardware Alsa Abstraction Layer for corresponding Sound Card
afb_req_success (request, NULL, NULL);
return;
}
// This callback is fired when afb_service_call for api/alsacore/subctl returns
STATIC void audioLogicOpenCB (void *handle, int iserror, struct json_object *result) {
struct afb_req request = afb_req_unstore(handle);
struct json_object *response;
//INFO (afbIface, "result=[%s]\n", json_object_to_json_string (result));
if (iserror) { // on error proxy information we got from lower layer
if (result) {
struct json_object *status, *info;
if (json_object_object_get_ex(result, "request", &response)) {
json_object_object_get_ex(response, "info" , &info);
json_object_object_get_ex(response, "status", &status);
afb_req_fail(request, json_object_get_string(status), json_object_get_string(info));
goto OnExit;
}
} else {
afb_req_fail(request, "Fail", "Unknown Error" );
}
goto OnExit;
}
// Get response from object
json_object_object_get_ex(result, "response", &response);
if (response) {
struct json_object *subobj;
// attach client context to session
AudioLogicCtxT *ctx = malloc (sizeof(AudioLogicCtxT));
// extract information from Json Alsa Object
json_object_object_get_ex(response, "cardid", &subobj);
if (subobj) ctx->cardid= json_object_get_int(subobj);
// store devid as an object for further alsa request
json_object_object_get_ex(response, "devid", &subobj);
if (subobj) ctx->devid= strdup(json_object_get_string(subobj));
json_object_object_get_ex(response, "shortname", &subobj);
if (subobj)ctx->shortname=strdup(json_object_get_string(subobj));
json_object_object_get_ex(response, "longname", &subobj);
if (subobj)ctx->longname=strdup(json_object_get_string(subobj));
// add AudioLogicCtxT to Client Session
NOTICE (afbIface, "audioLogicOpen ctx->devid=[%s]", ctx->devid);
// save queryurl with devid only for further ALSA request
ctx->queryurl=json_object_new_object();
json_object_object_add(ctx->queryurl, "devid",json_object_new_string(ctx->devid));
afb_req_context_set(request, ctx, free);
}
// release original calling request
afb_req_success(request, response, NULL);
OnExit:
afb_req_unref(request);
return;
}
// Delegate to lowerlevel the mapping of soundcard name with soundcard ID
PUBLIC void audioLogicOpen(struct afb_req request) {
// Delegate query to lower level
struct afb_req *handle = afb_req_store(request);
if (!handle) afb_req_fail(request, "error", "out of memory");
else afb_service_call(srvitf, "alsacore", "getCardId", json_object_get(afb_req_json(request)), audioLogicOpenCB, handle);
}
// Free client context create from audioLogicOpenCB
PUBLIC void audioLogicClose (struct afb_req request) {
// retrieve current client context to print debug info
AudioLogicCtxT *ctx = (AudioLogicCtxT*) afb_req_context_get(request);
DEBUG (afbIface, "audioLogicClose cardid=%d devid=%s shortname=%s longname=%s", ctx->cardid, ctx->devid, ctx->shortname, ctx->longname);
}
// this function is call after all binder are loaded and initialised
PUBLIC int audioLogicInit (struct afb_service service) {
srvitf = service;
return 0;
}
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