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"
21 /* ********************************************************
23 FULUP integration proposal with client session context
25 ******************************************************** */
27 /* ------ LOCAL HELPER FUNCTIONS --------- */
29 /* detect new radio devices */
30 STATIC void updateRadioDevList(pluginHandleT *handle) {
34 // loop on existing radio if any
35 for (idx = 0; idx < _radio_dev_count(); idx++) {
36 if (idx == MAX_RADIO) break;
37 handle->radios[idx] = calloc(1, sizeof(radioDevT)); /* use calloc to set used to FALSE */
38 handle->radios[idx]->name = (char *) _radio_dev_name(idx);
40 handle->devCount = _radio_dev_count();
43 /* global plugin context creation ; at loading time [radio devices might not be visible] */
44 STATIC pluginHandleT* initRadioPlugin() {
46 pluginHandleT *handle;
48 handle = calloc (1, sizeof(pluginHandleT));
49 updateRadioDevList (handle);
54 /* private client context creation ; default values */
55 STATIC radioCtxHandleT* initRadioCtx () {
59 ctx = malloc (sizeof(radioCtxHandleT));
70 /* reserve a radio device for requesting client, power it on */
71 STATIC AFB_error reserveRadio (pluginHandleT *handle, radioCtxHandleT *ctx) {
74 /* loop on all devices, find an unused one */
75 for (idx = 0; idx < _radio_dev_count(); idx++) {
76 if (idx == MAX_RADIO) break;
77 if (handle->radios[idx]->used == FALSE) goto found_radio; /* found one */
82 /* try to power it on, passing client context info such as frequency... */
84 /* TODO : try to re-iterate from the next ones if it failed ! */
86 /* globally mark it as reserved */
87 handle->radios[idx]->used = TRUE;
89 /* store relevant info to client context (direct pointer, index) */
90 ctx->radio = handle->radios[idx];
96 /* free a radio device from requesting client, power it off */
97 STATIC AFB_error releaseRadio (pluginHandleT *handle, radioCtxHandleT *ctx) {
99 /* stop playing if it was doing this (blocks otherwise) */
100 if (ctx->is_playing) {
102 _radio_stop (ctx->idx);
106 _radio_off (ctx->idx);
108 /* globally mark it as free */
109 handle->radios[ctx->idx]->used = FALSE;
111 /* clean client context */
118 /* called when client session dies [e.g. client quits for more than 15mns] */
119 STATIC void freeRadio (void *context, void *handle) {
121 releaseRadio (handle, context);
126 /* ------ PUBLIC PLUGIN FUNCTIONS --------- */
128 STATIC json_object* init (AFB_request *request) { /* AFB_SESSION_CHECK */
132 /* create a private client context */
133 if (!request->context)
134 request->context = initRadioCtx();
136 jresp = json_object_new_object();
137 json_object_object_add(jresp, "info", json_object_new_string ("Radio initialized"));
141 STATIC json_object* power (AFB_request *request) { /* AFB_SESSION_CHECK */
143 pluginHandleT *handle = (pluginHandleT*)request->handle;
144 radioCtxHandleT *ctx = (radioCtxHandleT*)request->context;
145 const char *value = getQueryValue (request, "value");
148 /* no "?value=" parameter : return current state */
150 jresp = json_object_new_object();
152 json_object_object_add (jresp, "power", json_object_new_string ("on"))
153 : json_object_object_add (jresp, "power", json_object_new_string ("off"));
156 /* "?value=" parameter is "1" or "true" */
157 else if ( atoi(value) == 1 || !strcasecmp(value, "true") ) {
159 if (reserveRadio (handle, ctx) == AFB_FAIL) {
160 request->errcode = MHD_HTTP_SERVICE_UNAVAILABLE;
161 return (jsonNewMessage (AFB_FAIL, "No more radio devices available"));
164 jresp = json_object_new_object();
165 json_object_object_add (jresp, "power", json_object_new_string ("on"));
168 /* "?value=" parameter is "0" or "false" */
169 else if ( atoi(value) == 0 || !strcasecmp(value, "false") ) {
171 if (releaseRadio (handle, ctx) == AFB_FAIL) {
172 request->errcode = MHD_HTTP_SERVICE_UNAVAILABLE;
173 return (jsonNewMessage (AFB_FAIL, "Unable to release radio device"));
176 jresp = json_object_new_object();
177 json_object_object_add (jresp, "power", json_object_new_string ("off"));
185 STATIC json_object* mode (AFB_request *request) { /* AFB_SESSION_CHECK */
187 radioCtxHandleT *ctx = (radioCtxHandleT*)request->context;
188 const char *value = getQueryValue (request, "value");
189 json_object *jresp = json_object_new_object();
191 /* no "?value=" parameter : return current state */
192 if (!value || !ctx->radio) {
194 json_object_object_add (jresp, "mode", json_object_new_string ("AM"))
195 : json_object_object_add (jresp, "mode", json_object_new_string ("FM"));
198 /* "?value=" parameter is "1" or "AM" */
199 else if ( atoi(value) == 1 || !strcasecmp(value, "AM") ) {
201 _radio_set_mode (ctx->idx, ctx->mode);
202 json_object_object_add (jresp, "mode", json_object_new_string ("AM"));
205 /* "?value=" parameter is "0" or "FM" */
206 else if ( atoi(value) == 0 || !strcasecmp(value, "FM") ) {
208 _radio_set_mode (ctx->idx, ctx->mode);
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->context;
218 const char *value = getQueryValue (request, "value");
219 json_object *jresp = json_object_new_object();
223 /* no "?value=" parameter : return current state */
224 if (!value || !ctx->radio) {
225 snprintf (freq_str, sizeof(freq_str), "%f", ctx->freq);
226 json_object_object_add (jresp, "freq", json_object_new_string (freq_str));
229 /* "?value=" parameter, set frequency */
231 freq = strtod (value, NULL);
232 _radio_set_freq (ctx->idx, freq);
233 ctx->freq = (float)freq;
235 snprintf (freq_str, sizeof(freq_str), "%f", ctx->freq);
236 json_object_object_add (jresp, "freq", json_object_new_string (freq_str));
242 STATIC json_object* mute (AFB_request *request) { /* AFB_SESSION_CHECK */
244 radioCtxHandleT *ctx = (radioCtxHandleT*)request->context;
245 const char *value = getQueryValue (request, "value");
246 json_object *jresp = json_object_new_object();
249 /* no "?value=" parameter : return current state */
250 if (!value || !ctx->radio) {
252 json_object_object_add (jresp, "mute", json_object_new_string ("on"))
253 : json_object_object_add (jresp, "mute", json_object_new_string ("off"));
256 /* "?value=" parameter is "1" or "true" */
257 else if ( atoi(value) == 1 || !strcasecmp(value, "true") ) {
259 _radio_set_mute (ctx->idx, ctx->mute);
260 json_object_object_add (jresp, "mute", json_object_new_string ("on"));
263 /* "?value=" parameter is "0" or "false" */
264 else if ( atoi(value) == 0 || !strcasecmp(value, "off") ) {
266 _radio_set_mute (ctx->idx, ctx->mute);
267 json_object_object_add (jresp, "mute", json_object_new_string ("off"));
273 STATIC json_object* play (AFB_request *request) { /* AFB_SESSION_CHECK */
275 radioCtxHandleT *ctx = (radioCtxHandleT*)request->context;
276 const char *value = getQueryValue (request, "value");
277 json_object *jresp = json_object_new_object();
279 /* no "?value=" parameter : return current state */
280 if (!value || !ctx->radio) {
282 json_object_object_add (jresp, "play", json_object_new_string ("on"))
283 : json_object_object_add (jresp, "play", json_object_new_string ("off"));
286 /* "?value=" parameter is "1" or "true" */
287 else if ( atoi(value) == 1 || !strcasecmp(value, "true") ) {
290 _radio_play (ctx->idx);
291 json_object_object_add (jresp, "play", json_object_new_string ("on"));
294 /* "?value=" parameter is "0" or "false" */
295 else if ( atoi(value) == 0 || !strcasecmp(value, "false") ) {
298 _radio_stop (ctx->idx);
299 json_object_object_add (jresp, "play", json_object_new_string ("off"));
305 STATIC json_object* ping (AFB_request *request) { /* AFB_SESSION_NONE */
306 return jsonNewMessage(AFB_SUCCESS, "Ping Binder Daemon - Radio API");
310 STATIC AFB_restapi pluginApis[]= {
311 {"init" , AFB_SESSION_CHECK, (AFB_apiCB)init , "Radio API - init"},
312 {"power" , AFB_SESSION_CHECK, (AFB_apiCB)power , "Radio API - power"},
313 {"mode" , AFB_SESSION_CHECK, (AFB_apiCB)mode , "Radio API - mode"},
314 {"freq" , AFB_SESSION_CHECK, (AFB_apiCB)freq , "Radio API - freq"},
315 {"mute" , AFB_SESSION_CHECK, (AFB_apiCB)mute , "Radio API - mute"},
316 {"play" , AFB_SESSION_CHECK, (AFB_apiCB)play , "Radio API - play"},
317 {"ping" , AFB_SESSION_NONE, (AFB_apiCB)ping , "Radio API - ping"},
321 PUBLIC AFB_plugin* pluginRegister () {
322 AFB_plugin *plugin = malloc (sizeof(AFB_plugin));
323 plugin->type = AFB_PLUGIN_JSON;
324 plugin->info = "Application Framework Binder - Radio plugin";
325 plugin->prefix = "radio";
326 plugin->apis = pluginApis;
328 plugin->handle = initRadioPlugin();
329 plugin->freeCtxCB = (AFB_freeCtxCB)freeRadio;