2 * Copyright (C) 2015, 2016 "IoT.bzh"
3 * Author "Manuel Bachmann"
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
20 #include <json-c/json.h>
22 #include "audio-api.h"
23 #include "audio-alsa.h"
25 #include "audio-pulse.h"
28 #include <afb/afb-plugin.h>
29 #include <afb/afb-req-itf.h>
31 /* ------ BACKEND FUNCTIONS ------- */
33 unsigned char _backend_init (const char *name, audioCtxHandleT *ctx) {
35 char *backend_env = getenv ("AFB_AUDIO_OUTPUT");
36 unsigned char res = 0;
39 if (!backend_env || (strcasecmp (backend_env, "Pulse") == 0))
40 res = _pulse_init (name, ctx);
43 res = _alsa_init (name, ctx);
46 fprintf (stderr, "Could not initialize Audio backend\n");
51 void _backend_free (audioCtxHandleT *ctx) {
54 if (ctx->audio_dev) _pulse_free (ctx); else
56 _alsa_free (ctx->name);
59 void _backend_play (audioCtxHandleT *ctx) {
62 if (ctx->audio_dev) _pulse_play (ctx); else
64 _alsa_play (ctx->idx);
67 void _backend_stop (audioCtxHandleT *ctx) {
70 if (ctx->audio_dev) _pulse_stop (ctx); else
72 _alsa_stop (ctx->idx);
75 unsigned int _backend_get_volume (audioCtxHandleT *ctx, unsigned int channel) {
78 if (ctx->audio_dev) return _pulse_get_volume (ctx, channel); else
80 return _alsa_get_volume (ctx->idx, channel);
83 void _backend_set_volume (audioCtxHandleT *ctx, unsigned int channel, unsigned int vol) {
86 if (ctx->audio_dev) _pulse_set_volume (ctx, channel, vol); else
88 _alsa_set_volume (ctx->idx, channel, vol);
91 void _backend_set_volume_all (audioCtxHandleT *ctx, unsigned int vol) {
94 if (ctx->audio_dev) _pulse_set_volume_all (ctx, vol); else
96 _alsa_set_volume_all (ctx->idx, vol);
99 unsigned char _backend_get_mute (audioCtxHandleT *ctx) {
102 if (ctx->audio_dev) return _pulse_get_mute (ctx); else
104 return _alsa_get_mute (ctx->idx);
107 void _backend_set_mute (audioCtxHandleT *ctx, unsigned char mute) {
110 if (ctx->audio_dev) _pulse_set_mute (ctx, mute); else
112 _alsa_set_mute (ctx->idx, mute);
115 void _backend_set_channels (audioCtxHandleT *ctx, unsigned int channels) {
118 if (ctx->audio_dev) return; else
120 _alsa_set_channels (ctx->idx, channels);
123 /* ------ LOCAL HELPER FUNCTIONS --------- */
125 /* private client context constructor ; default values */
126 static audioCtxHandleT* initAudioCtx () {
128 audioCtxHandleT *ctx;
131 ctx = malloc (sizeof(audioCtxHandleT));
132 ctx->audio_dev = NULL;
135 for (i = 0; i < 8; i++)
144 static void releaseAudioCtx (void *context) {
146 audioCtxHandleT *ctx = (audioCtxHandleT*) context;
151 /* clean client context */
152 ctx->audio_dev = NULL;
160 /* ------ PUBLIC PLUGIN FUNCTIONS --------- */
162 static void init (struct afb_req request) { /* AFB_SESSION_CHECK */
164 audioCtxHandleT *ctx = afb_req_context_get (request);
167 /* create a private client context */
169 ctx = initAudioCtx();
170 afb_req_context_set (request, ctx, releaseAudioCtx);
173 if (!_backend_init ("default", ctx))
174 afb_req_fail (request, "failed", "backend initialization failed");
176 jresp = json_object_new_object();
177 json_object_object_add (jresp, "init", json_object_new_string ("success"));
178 afb_req_success (request, jresp, "Audio initialized");
181 static void volume (struct afb_req request) { /* AFB_SESSION_CHECK */
183 audioCtxHandleT *ctx = afb_req_context_get (request);
184 const char *value = afb_req_value (request, "value");
186 unsigned int volume[8], i;
188 char volume_str[256];
192 afb_req_fail (request, "failed", "you must call 'init' first");
195 jresp = json_object_new_object();
197 /* no "?value=" parameter : return current state */
199 for (i = 0; i < 8; i++) {
200 ctx->volume[i] = _backend_get_volume (ctx, i);
201 snprintf (volume_str+len_str, sizeof(volume_str)-len_str, "%d,", ctx->volume[i]);
202 len_str = strlen (volume_str);
204 json_object_object_add (jresp, "volume", json_object_new_string(volume_str));
205 afb_req_success (request, jresp, "Audio - Volume obtained");
209 /* "?value=" parameter, set volume */
211 volume_i = strdup (value);
212 volume_i = strtok (volume_i, ",");
213 volume[0] = (unsigned int) atoi (volume_i);
215 if (100 < volume[0]) {
217 afb_req_fail (request, "failed", "volume must be between 0 and 100");
220 ctx->volume[0] = volume[0];
221 _backend_set_volume (ctx, 0, ctx->volume[0]);
222 snprintf (volume_str, sizeof(volume_str), "%d,", ctx->volume[0]);
224 for (i = 1; i < 8; i++) {
225 volume_i = strtok (NULL, ",");
226 /* if there is only one value, set all channels to this one */
227 if (!volume_i && i == 1)
228 _backend_set_volume_all (ctx, ctx->volume[0]);
229 if (!volume_i || 100 < atoi(volume_i) || atoi(volume_i) < 0)
230 ctx->volume[i] = _backend_get_volume (ctx, i);
232 ctx->volume[i] = (unsigned int) atoi(volume_i);
233 _backend_set_volume (ctx, i, ctx->volume[i]);
235 len_str = strlen(volume_str);
236 snprintf (volume_str+len_str, sizeof(volume_str)-len_str, "%d,", ctx->volume[i]);
239 json_object_object_add (jresp, "volume", json_object_new_string(volume_str));
242 afb_req_success (request, jresp, "Audio - Volume changed");
245 static void channels (struct afb_req request) { /* AFB_SESSION_CHECK */
247 audioCtxHandleT *ctx = afb_req_context_get (request);
248 const char *value = afb_req_value (request, "value");
250 char channels_str[256];
253 afb_req_fail (request, "failed", "you must call 'init' first");
256 jresp = json_object_new_object();
258 /* no "?value=" parameter : return current state */
260 snprintf (channels_str, sizeof(channels_str), "%d", ctx->channels);
262 json_object_object_add (jresp, "channels", json_object_new_string (channels_str));
263 afb_req_success (request, jresp, "Audio - Channels obtained");
267 /* "?value=" parameter, set channels */
269 ctx->channels = (unsigned int) atoi (value);
270 _backend_set_channels (ctx, ctx->channels);
271 snprintf (channels_str, sizeof(channels_str), "%d", ctx->channels);
273 jresp = json_object_new_object();
274 json_object_object_add (jresp, "channels", json_object_new_string (channels_str));
277 afb_req_success (request, jresp, "Audio - Channels set");
280 static void mute (struct afb_req request) { /* AFB_SESSION_CHECK */
282 audioCtxHandleT *ctx = afb_req_context_get (request);
283 const char *value = afb_req_value (request, "value");
287 afb_req_fail (request, "failed", "you must call 'init' first");
290 jresp = json_object_new_object();
292 /* no "?value=" parameter : return current state */
294 ctx->mute = _backend_get_mute (ctx);
296 json_object_object_add (jresp, "mute", json_object_new_string ("on"))
297 : json_object_object_add (jresp, "mute", json_object_new_string ("off"));
298 afb_req_success (request, jresp, "Audio - Mute status obtained");
302 /* "?value=" parameter is "1" or "true" */
303 else if ( atoi(value) == 1 || !strcasecmp(value, "true") ) {
305 _backend_set_mute (ctx, ctx->mute);
306 json_object_object_add (jresp, "mute", json_object_new_string ("on"));
309 /* "?value=" parameter is "0" or "false" */
310 else if ( atoi(value) == 0 || !strcasecmp(value, "false") ) {
312 _backend_set_mute (ctx, ctx->mute);
313 json_object_object_add (jresp, "mute", json_object_new_string ("off"));
316 afb_req_success (request, jresp, "Audio - Mute set");
319 static void play (struct afb_req request) { /* AFB_SESSION_CHECK */
321 audioCtxHandleT *ctx = afb_req_context_get (request);
322 const char *value = afb_req_value (request, "value");
326 afb_req_fail (request, "failed", "you must call 'init' first");
329 jresp = json_object_new_object();
331 /* no "?value=" parameter : return current state */
334 json_object_object_add (jresp, "play", json_object_new_string ("on"))
335 : json_object_object_add (jresp, "play", json_object_new_string ("off"));
336 afb_req_success (request, jresp, "Audio - Playing status obtained");
340 /* "?value=" parameter is "1" or "true" */
341 else if ( atoi(value) == 1 || !strcasecmp(value, "true") ) {
344 json_object_object_add (jresp, "play", json_object_new_string ("on"));
347 /* "?value=" parameter is "0" or "false" */
348 else if ( atoi(value) == 0 || !strcasecmp(value, "false") ) {
351 json_object_object_add (jresp, "play", json_object_new_string ("off"));
354 afb_req_success (request, jresp, "Audio - Play");
357 static void ping (struct afb_req request) { /* AFB_SESSION_NONE */
358 afb_req_success (request, NULL, "Audio - Ping success");
361 static const struct AFB_verb_desc_v1 verbs[] = {
362 {"init" , AFB_SESSION_CHECK, init , "Audio API - init"},
363 {"volume" , AFB_SESSION_CHECK, volume , "Audio API - volume"},
364 {"channels", AFB_SESSION_CHECK, channels , "Audio API - channels"},
365 {"mute" , AFB_SESSION_CHECK, mute , "Audio API - mute"},
366 {"play" , AFB_SESSION_CHECK, play , "Audio API - play"},
367 {"ping" , AFB_SESSION_NONE, ping , "Audio API - ping"},
371 static const struct AFB_plugin pluginDesc = {
372 .type = AFB_PLUGIN_VERSION_1,
374 .info = "Application Framework Binder - Audio plugin",
380 const struct AFB_plugin *pluginAfbV1Register (const struct AFB_interface *itf)