2 * Copyright (C) 2015 "IoT.bzh"
3 * Author "Manuel Bachmann"
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include "radio-api.h"
20 #include "radio-rtlsdr.h"
22 /* ********************************************************
24 FULUP integration proposal with client session context
26 ******************************************************** */
28 /* ------ LOCAL HELPER FUNCTIONS --------- */
30 /* detect new radio devices */
31 STATIC void updateRadioDevList(pluginHandleT *handle) {
35 // loop on existing radio if any
36 for (idx = 0; idx < _radio_dev_count(); idx++) {
37 if (idx == MAX_RADIO) break;
38 handle->radios[idx] = calloc(1, sizeof(radioDevT)); /* use calloc to set used to FALSE */
39 handle->radios[idx]->name = (char *) _radio_dev_name(idx);
41 handle->devCount = _radio_dev_count();
44 /* global plugin context creation ; at loading time [radio devices might not be visible] */
45 STATIC pluginHandleT* initRadioPlugin() {
47 pluginHandleT *handle;
49 handle = calloc (1, sizeof(pluginHandleT));
50 updateRadioDevList (handle);
55 /* private client context creation ; default values */
56 STATIC radioCtxHandleT* initRadioCtx () {
60 ctx = malloc (sizeof(radioCtxHandleT));
71 /* reserve a radio device for requesting client, power it on */
72 STATIC AFB_error reserveRadio (pluginHandleT *handle, radioCtxHandleT *ctx) {
75 /* loop on all devices, find an unused one */
76 for (idx = 0; idx < _radio_dev_count(); idx++) {
77 if (idx == MAX_RADIO) break;
78 if (handle->radios[idx]->used == FALSE) goto found_radio; /* found one */
83 /* try to power it on, passing client context info such as frequency... */
85 /* TODO : try to re-iterate from the next ones if it failed ! */
87 /* globally mark it as reserved */
88 handle->radios[idx]->used = TRUE;
90 /* store relevant info to client context (direct pointer, index) */
91 ctx->radio = handle->radios[idx];
97 /* free a radio device from requesting client, power it off */
98 STATIC AFB_error releaseRadio (pluginHandleT *handle, radioCtxHandleT *ctx) {
101 _radio_off (ctx->idx);
103 /* globally mark it as free */
104 handle->radios[ctx->idx]->used = FALSE;
106 /* clean client context */
113 /* called when client session dies [e.g. client quits for more than 15mns] */
114 STATIC json_object* freeRadio (AFB_clientCtx *client) {
116 releaseRadio (client->plugin->handle, client->ctx);
119 return jsonNewMessage (AFB_SUCCESS, "Released radio and client context");
123 /* ------ PUBLIC PLUGIN FUNCTIONS --------- */
125 STATIC json_object* init (AFB_request *request) { /* AFB_SESSION_CREATE */
127 radioCtxHandleT *ctx;
130 /* create a private client context */
131 ctx = initRadioCtx();
132 request->client->ctx = (radioCtxHandleT*)ctx;
134 jresp = json_object_new_object();
135 json_object_object_add(jresp, "token", json_object_new_string (request->client->token));
138 STATIC json_object* power (AFB_request *request) { /* AFB_SESSION_CHECK */
140 pluginHandleT *handle = request->client->plugin->handle;
141 radioCtxHandleT *ctx = (radioCtxHandleT*)request->client->ctx;
142 const char *value = getQueryValue (request, "value");
145 /* no "?value=" parameter : return current state */
147 jresp = json_object_new_object();
149 json_object_object_add (jresp, "power", json_object_new_string ("on"))
150 : json_object_object_add (jresp, "power", json_object_new_string ("off"));
153 /* "?value=" parameter is "1" or "on" */
154 else if ( atoi(value) == 1 || !strcasecmp(value, "on") ) {
156 if (reserveRadio (handle, ctx) == AFB_FAIL) {
157 request->errcode = MHD_HTTP_SERVICE_UNAVAILABLE;
158 return (jsonNewMessage (AFB_FAIL, "No more radio devices available"));
161 jresp = json_object_new_object();
162 json_object_object_add (jresp, "power", json_object_new_string ("on"));
165 /* "?value=" parameter is "0" or "off" */
166 else if ( atoi(value) == 0 || !strcasecmp(value, "off") ) {
168 if (releaseRadio (handle, ctx) == AFB_FAIL) {
169 request->errcode = MHD_HTTP_SERVICE_UNAVAILABLE;
170 return (jsonNewMessage (AFB_FAIL, "Unable to release radio device"));
173 jresp = json_object_new_object();
174 json_object_object_add (jresp, "power", json_object_new_string ("off"));
180 STATIC json_object* mode (AFB_request *request) { /* AFB_SESSION_CHECK */
182 radioCtxHandleT *ctx = (radioCtxHandleT*)request->client->ctx;
183 const char *value = getQueryValue (request, "value");
186 /* no "?value=" parameter : return current state */
188 jresp = json_object_new_object();
190 json_object_object_add (jresp, "mode", json_object_new_string ("AM"))
191 : json_object_object_add (jresp, "mode", json_object_new_string ("FM"));
194 /* "?value=" parameter is "1" or "on" */
195 else if ( atoi(value) == 1 || !strcasecmp(value, "AM") ) {
197 _radio_set_mode (ctx->idx, ctx->mode);
199 jresp = json_object_new_object();
200 json_object_object_add (jresp, "mode", json_object_new_string ("AM"));
203 /* "?value=" parameter is "0" or "off" */
204 else if ( atoi(value) == 0 || !strcasecmp(value, "FM") ) {
206 _radio_set_mode (ctx->idx, ctx->mode);
208 jresp = json_object_new_object();
209 json_object_object_add (jresp, "mode", json_object_new_string ("FM"));
215 STATIC json_object* freq (AFB_request *request) { /* AFB_SESSION_CHECK */
217 radioCtxHandleT *ctx = (radioCtxHandleT*)request->client->ctx;
218 const char *value = getQueryValue (request, "value");
219 json_object *jresp = json_object_new_object();
222 /* no "?value=" parameter : return current state */
224 snprintf (freq_str, sizeof(freq_str), "%f", ctx->freq);
225 json_object_object_add (jresp, "freq", json_object_new_string (freq_str));
228 /* "?value=" parameter, set frequency */
230 ctx->freq = strtof (value, NULL);
231 _radio_set_freq (ctx->idx, ctx->freq);
233 snprintf (freq_str, sizeof(freq_str), "%f", ctx->freq);
234 json_object_object_add (jresp, "freq", json_object_new_string (freq_str));
240 STATIC json_object* mute (AFB_request *request) { /* AFB_SESSION_CHECK */
242 radioCtxHandleT *ctx = (radioCtxHandleT*)request->client->ctx;
243 const char *value = getQueryValue (request, "value");
247 /* no "?value=" parameter : return current state */
250 json_object_object_add (jresp, "mute", json_object_new_string ("on"))
251 : json_object_object_add (jresp, "mute", json_object_new_string ("off"));
254 /* "?value=" parameter is "1" or "on" */
255 else if ( atoi(value) == 1 || !strcasecmp(value, "on") ) {
257 _radio_set_mute (ctx->idx, ctx->mute);
259 jresp = json_object_new_object();
260 json_object_object_add (jresp, "mute", json_object_new_string ("on"));
263 /* "?value=" parameter is "0" or "off" */
264 else if ( atoi(value) == 0 || !strcasecmp(value, "off") ) {
266 _radio_set_mute (ctx->idx, ctx->mute);
268 jresp = json_object_new_object();
269 json_object_object_add (jresp, "mute", json_object_new_string ("off"));
275 STATIC json_object* play (AFB_request *request) { /* AFB_SESSION_CHECK */
277 radioCtxHandleT *ctx = (radioCtxHandleT*)request->client->ctx;
278 const char *value = getQueryValue (request, "value");
279 json_object *jresp = json_object_new_object();
281 /* no "?value=" parameter : return current state */
284 json_object_object_add (jresp, "play", json_object_new_string ("on"))
285 : json_object_object_add (jresp, "play", json_object_new_string ("off"));
288 /* "?value=" parameter is "1" or "on" */
289 else if ( atoi(value) == 1 || !strcasecmp(value, "on") ) {
292 _radio_play (ctx->idx);
293 json_object_object_add (jresp, "play", json_object_new_string ("on"));
296 /* "?value=" parameter is "0" or "off" */
297 else if ( atoi(value) == 0 || !strcasecmp(value, "off") ) {
300 _radio_stop (ctx->idx);
301 json_object_object_add (jresp, "play-on", json_object_new_string ("off"));
307 STATIC json_object* status (AFB_request *request) {
312 STATIC AFB_restapi pluginApis[]= {
313 {"init" , AFB_SESSION_CREATE, (AFB_apiCB)init , "Radio API - init"},
314 {"power" , AFB_SESSION_CHECK, (AFB_apiCB)power , "Radio API - power"},
315 {"mode" , AFB_SESSION_CHECK, (AFB_apiCB)mode , "Radio API - mode"},
316 {"freq" , AFB_SESSION_CHECK, (AFB_apiCB)freq , "Radio API - freq"},
317 {"mute" , AFB_SESSION_CHECK, (AFB_apiCB)mute , "Radio API - mute"},
318 {"play" , AFB_SESSION_CHECK, (AFB_apiCB)play , "Radio API - play"},
319 {"status" , AFB_SESSION_RENEW, (AFB_apiCB)status , "Radio API - status"},
323 PUBLIC AFB_plugin* radioRegister () {
324 AFB_plugin *plugin = malloc (sizeof(AFB_plugin));
325 plugin->type = AFB_PLUGIN_JSON;
326 plugin->info = "Application Framework Binder - Radio plugin";
327 plugin->prefix = "radio";
328 plugin->apis = pluginApis;
330 plugin->handle = initRadioPlugin();
331 plugin->freeCtxCB = freeRadio;