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/*
* Copyright (C) 2015 "IoT.bzh"
* Author "Manuel Bachmann"
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "audio-api.h"
#include "audio-alsa.h"
/* ------ LOCAL HELPER FUNCTIONS --------- */
/* private client context creation ; default values */
STATIC audioCtxHandleT* initAudioCtx () {
audioCtxHandleT *actx;
actx = malloc (sizeof(audioCtxHandleT));
actx->idx = -1;
actx->volume = 25;
actx->channels = 2;
actx->mute = 0;
return actx;
}
STATIC AFB_error releaseAudio (audioCtxHandleT *actx) {
/* power it off */
_alsa_free (actx->idx);
/* clean client context */
actx->idx = -1;
return AFB_SUCCESS;
}
/* called when client session dies [e.g. client quits for more than 15mns] */
STATIC json_object* freeAudio (AFB_clientCtx *client) {
releaseAudio (client->ctx);
free (client->ctx);
return jsonNewMessage (AFB_SUCCESS, "Released radio and client context");
}
/* ------ PUBLIC PLUGIN FUNCTIONS --------- */
STATIC json_object* init (AFB_request *request) { /* AFB_SESSION_CREATE */
audioCtxHandleT *actx;
json_object *jresp;
int idx;
/* create a private client context */
actx = initAudioCtx();
request->client->ctx = (audioCtxHandleT*)actx;
_alsa_init("default", actx);
jresp = json_object_new_object();
json_object_object_add (jresp, "token", json_object_new_string (request->client->token));
return jresp;
}
STATIC json_object* volume (AFB_request *request) { /* AFB_SESSION_CHECK */
audioCtxHandleT *actx = (audioCtxHandleT*)request->client->ctx;
const char *value = getQueryValue (request, "value");
json_object *jresp;
int volume;
char volume_str[256];
/* no "?value=" parameter : return current state */
if (!value) {
actx->volume = _alsa_get_volume (actx->idx);
snprintf (volume_str, sizeof(volume_str), "%d", actx->volume);
jresp = json_object_new_object();
json_object_object_add (jresp, "volume", json_object_new_string(volume_str));
}
/* "?value=" parameter, set volume */
else {
volume = atoi (value);
if (100 < volume < 0) {
request->errcode = MHD_HTTP_SERVICE_UNAVAILABLE;
return (jsonNewMessage (AFB_FAIL, "Volume must be between 0 and 100"));
}
actx->volume = volume;
_alsa_set_volume (actx->idx, actx->volume);
snprintf (volume_str, sizeof(volume_str), "%d", actx->volume);
jresp = json_object_new_object();
json_object_object_add (jresp, "volume", json_object_new_string(volume_str));
}
return jresp;
}
STATIC json_object* channels (AFB_request *request) { /* AFB_SESSION_CHECK */
audioCtxHandleT *actx = (audioCtxHandleT*)request->client->ctx;
const char *value = getQueryValue (request, "value");
json_object *jresp = json_object_new_object();
char channels_str[256];
/* no "?value=" parameter : return current state */
if (!value) {
snprintf (channels_str, sizeof(channels_str), "%d", actx->channels);
json_object_object_add (jresp, "channels", json_object_new_string (channels_str));
}
/* "?value=" parameter, set channels */
else {
actx->channels = atoi (value);
_alsa_set_channels (actx->idx, actx->channels);
snprintf (channels_str, sizeof(channels_str), "%d", actx->channels);
json_object_object_add (jresp, "channels", json_object_new_string (channels_str));
}
return jresp;
}
STATIC json_object* mute (AFB_request *request) { /* AFB_SESSION_CHECK */
audioCtxHandleT *actx = (audioCtxHandleT*)request->client->ctx;
const char *value = getQueryValue (request, "value");
json_object *jresp = json_object_new_object();
/* no "?value=" parameter : return current state */
if (!value) {
actx->mute = _alsa_get_mute (actx->idx);
actx->mute ?
json_object_object_add (jresp, "mute", json_object_new_string ("on"))
: json_object_object_add (jresp, "mute", json_object_new_string ("off"));
}
/* "?value=" parameter is "1" or "on" */
else if ( atoi(value) == 1 || !strcasecmp(value, "on") ) {
actx->mute = 1;
_alsa_set_mute (actx->idx, actx->mute);
json_object_object_add (jresp, "mute", json_object_new_string ("on"));
}
/* "?value=" parameter is "0" or "off" */
else if ( atoi(value) == 0 || !strcasecmp(value, "off") ) {
actx->mute = 0;
_alsa_set_mute (actx->idx, actx->mute);
json_object_object_add (jresp, "mute", json_object_new_string ("off"));
}
return jresp;
}
STATIC json_object* status (AFB_request *request) { /* AFB_SESSION_RENEW */
return NULL;
}
STATIC AFB_restapi pluginApis[]= {
{"init" , AFB_SESSION_CREATE, (AFB_apiCB)init , "Audio API - init"},
{"volume" , AFB_SESSION_CHECK, (AFB_apiCB)volume , "Audio API - volume"},
{"channels", AFB_SESSION_CHECK, (AFB_apiCB)channels , "Audio API - channels"},
{"mute" , AFB_SESSION_CHECK, (AFB_apiCB)mute , "Audio API - mute"},
{"status" , AFB_SESSION_RENEW, (AFB_apiCB)status , "Audio API - status"},
{NULL}
};
PUBLIC AFB_plugin *audioRegister () {
AFB_plugin *plugin = malloc (sizeof(AFB_plugin));
plugin->type = AFB_PLUGIN_JSON;
plugin->info = "Application Framework Binder - Audio plugin";
plugin->prefix = "audio";
plugin->apis = pluginApis;
plugin->freeCtxCB = freeAudio;
return (plugin);
};
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