/*
* Copyright (C) 2015 "IoT.bzh"
- * Author "Fulup Ar Foll"
+ * 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include "audio-api.h"
-#include "local-def.h"
+/* ------ BACKEND FUNCTIONS ------- */
-STATIC json_object* wrongApi (AFB_request *request, void* handle) {
- int zero=0;
- int bug=1234;
- int impossible;
-
- impossible=bug/zero;
+void _backend_init (const char *name, audioCtxHandleT *ctx) {
+
+ char *backend_env = getenv ("AFB_AUDIO_OUTPUT");
+ unsigned char res = -1;
+
+# ifdef HAVE_PULSE
+ if (!backend_env || (strcasecmp (backend_env, "Alsa") != 0))
+ res = _pulse_init (name, ctx);
+ if (res < 0)
+#endif
+ res = _alsa_init (name, ctx);
+
+ if (res < 0 && verbose)
+ fprintf (stderr, "Could not initialize Audio backend\n");
+}
+
+void _backend_free (audioCtxHandleT *ctx) {
+
+# ifdef HAVE_PULSE
+ if (ctx->audio_dev) _pulse_free (ctx); else
+# endif
+ _alsa_free (ctx->idx);
+}
+
+void _backend_play (audioCtxHandleT *ctx) {
+
+# ifdef HAVE_PULSE
+ if (ctx->audio_dev) _pulse_play (ctx); else
+# endif
+ _alsa_play (ctx->idx);
+}
+
+void _backend_stop (audioCtxHandleT *ctx) {
+
+# ifdef HAVE_PULSE
+ if (ctx->audio_dev) _pulse_stop (ctx); else
+# endif
+ _alsa_stop (ctx->idx);
+}
+
+int _backend_get_volume (audioCtxHandleT *ctx, unsigned int channel) {
+
+# ifdef HAVE_PULSE
+ if (ctx->audio_dev) return _pulse_get_volume (ctx, channel); else
+# endif
+ return _alsa_get_volume (ctx->idx, channel);
+}
+
+void _backend_set_volume (audioCtxHandleT *ctx, unsigned int channel, int vol) {
+
+# ifdef HAVE_PULSE
+ if (ctx->audio_dev) _pulse_set_volume (ctx, channel, vol); else
+# endif
+ _alsa_set_volume (ctx->idx, channel, vol);
+}
+
+void _backend_set_volume_all (audioCtxHandleT *ctx, int vol) {
+
+# ifdef HAVE_PULSE
+ if (ctx->audio_dev) _pulse_set_volume_all (ctx, vol); else
+# endif
+ _alsa_set_volume_all (ctx->idx, vol);
+}
+
+unsigned char _backend_get_mute (audioCtxHandleT *ctx) {
+
+# ifdef HAVE_PULSE
+ if (ctx->audio_dev) return _pulse_get_mute (ctx); else
+# endif
+ return _alsa_get_mute (ctx->idx);
+}
+
+void _backend_set_mute (audioCtxHandleT *ctx, unsigned char mute) {
+
+# ifdef HAVE_PULSE
+ if (ctx->audio_dev) _pulse_set_mute (ctx, mute); else
+# endif
+ _alsa_set_mute (ctx->idx, mute);
+}
+
+void _backend_set_channels (audioCtxHandleT *ctx, unsigned int channels) {
+
+# ifdef HAVE_PULSE
+ if (ctx->audio_dev) return; else
+# endif
+ _alsa_set_channels (ctx->idx, channels);
+}
+
+/* ------ LOCAL HELPER FUNCTIONS --------- */
+
+/* private client context creation ; default values */
+STATIC audioCtxHandleT* initAudioCtx () {
+
+ audioCtxHandleT *ctx;
+ int i;
+
+ ctx = malloc (sizeof(audioCtxHandleT));
+ ctx->audio_dev = NULL;
+ ctx->idx = -1;
+ for (i = 0; i < 8; i++)
+ ctx->volume[i] = 25;
+ ctx->channels = 2;
+ ctx->mute = 0;
+ ctx->is_playing = 0;
+
+ return ctx;
+}
+
+STATIC AFB_error releaseAudio (audioCtxHandleT *ctx) {
+
+ /* power it off */
+ _backend_free (ctx);
+
+ /* clean client context */
+ ctx->idx = -1;
+
+ return AFB_SUCCESS;
+}
+
+/* called when client session dies [e.g. client quits for more than 15mns] */
+STATIC void freeAudio (void *context) {
+ free (context);
+}
+
+
+/* ------ PUBLIC PLUGIN FUNCTIONS --------- */
+
+STATIC json_object* init (AFB_request *request) { /* AFB_SESSION_CHECK */
+
+ json_object *jresp;
+ int idx;
+
+ /* create a private client context */
+ if (!request->context)
+ request->context = initAudioCtx();
+
+ _backend_init("default", request->context);
+
+ jresp = json_object_new_object();
+ json_object_object_add (jresp, "info", json_object_new_string ("Audio initialised"));
+ return (jresp);
+}
+
+STATIC json_object* volume (AFB_request *request) { /* AFB_SESSION_CHECK */
+
+ audioCtxHandleT *ctx = (audioCtxHandleT*)request->context;
+ const char *value = getQueryValue (request, "value");
+ json_object *jresp;
+ int volume[8], i;
+ char *volume_i;
+ char volume_str[256];
+ int len_str = 0;
+
+ /* no "?value=" parameter : return current state */
+ if (!value) {
+ for (i = 0; i < 8; i++) {
+ ctx->volume[i] = _backend_get_volume (ctx, i);
+ snprintf (volume_str+len_str, sizeof(volume_str)-len_str, "%d,", ctx->volume[i]);
+ len_str = strlen(volume_str);
+ }
+ jresp = json_object_new_object();
+ json_object_object_add (jresp, "volume", json_object_new_string(volume_str));
+ }
+
+ /* "?value=" parameter, set volume */
+ else {
+ volume_i = strdup (value);
+ volume_i = strtok (volume_i, ",");
+ volume[0] = atoi (volume_i);
+
+ if ((100 < volume[0])||(volume[0] < 0)) {
+ free (volume_i);
+ request->errcode = MHD_HTTP_SERVICE_UNAVAILABLE;
+ return (jsonNewMessage (AFB_FAIL, "Volume must be between 0 and 100"));
+ }
+ ctx->volume[0] = volume[0];
+ _backend_set_volume (ctx, 0, ctx->volume[0]);
+ snprintf (volume_str, sizeof(volume_str), "%d,", ctx->volume[0]);
+
+ for (i = 1; i < 8; i++) {
+ volume_i = strtok (NULL, ",");
+ /* if there is only one value, set all channels to this one */
+ if (!volume_i && i == 1)
+ _backend_set_volume_all (ctx, ctx->volume[0]);
+ if (!volume_i || 100 < atoi(volume_i) < 0) {
+ ctx->volume[i] = _backend_get_volume (ctx, i);
+ } else {
+ ctx->volume[i] = atoi(volume_i);
+ _backend_set_volume (ctx, i, ctx->volume[i]);
+ }
+ len_str = strlen(volume_str);
+ snprintf (volume_str+len_str, sizeof(volume_str)-len_str, "%d,", ctx->volume[i]);
+ }
+ 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 *ctx = (audioCtxHandleT*)request->context;
+ 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", ctx->channels);
+ json_object_object_add (jresp, "channels", json_object_new_string (channels_str));
+ }
+
+ /* "?value=" parameter, set channels */
+ else {
+ ctx->channels = atoi (value);
+ _backend_set_channels (ctx, ctx->channels);
+
+ snprintf (channels_str, sizeof(channels_str), "%d", ctx->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 *ctx = (audioCtxHandleT*)request->context;
+ const char *value = getQueryValue (request, "value");
+ json_object *jresp = json_object_new_object();
+
+ /* no "?value=" parameter : return current state */
+ if (!value) {
+ ctx->mute = _backend_get_mute (ctx);
+ ctx->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 "true" */
+ else if ( atoi(value) == 1 || !strcasecmp(value, "true") ) {
+ ctx->mute = 1;
+ _backend_set_mute (ctx, ctx->mute);
+
+ json_object_object_add (jresp, "mute", json_object_new_string ("on"));
+ }
+
+ /* "?value=" parameter is "0" or "false" */
+ else if ( atoi(value) == 0 || !strcasecmp(value, "false") ) {
+ ctx->mute = 0;
+ _backend_set_mute (ctx, ctx->mute);
+
+ json_object_object_add (jresp, "mute", json_object_new_string ("off"));
+ }
+
+ return jresp;
+}
+STATIC json_object* play (AFB_request *request) { /* AFB_SESSION_CHECK */
-STATIC struct {
- void * somedata;
-} handle;
+ audioCtxHandleT *ctx = (audioCtxHandleT*)request->context;
+ const char *value = getQueryValue (request, "value");
+ json_object *jresp = json_object_new_object();
+ /* no "?value=" parameter : return current state */
+ if (!value) {
+ ctx->is_playing ?
+ json_object_object_add (jresp, "play", json_object_new_string ("on"))
+ : json_object_object_add (jresp, "play", json_object_new_string ("off"));
+ }
-STATIC AFB_restapi pluginApis[]= {
- {"ping" , AFB_SESSION_NONE, (AFB_apiCB)apiPingTest,"Ping Application Framework"},
- {"error" , AFB_SESSION_NONE, (AFB_apiCB)wrongApi , "Ping Application Framework"},
+ /* "?value=" parameter is "1" or "true" */
+ else if ( atoi(value) == 1 || !strcasecmp(value, "true") ) {
+ ctx->is_playing = 1;
+ _backend_play (ctx);
+ json_object_object_add (jresp, "play", json_object_new_string ("on"));
+ }
+
+ /* "?value=" parameter is "0" or "false" */
+ else if ( atoi(value) == 0 || !strcasecmp(value, "false") ) {
+ ctx->is_playing = 0;
+ _backend_stop (ctx);
+
+ json_object_object_add (jresp, "play", json_object_new_string ("off"));
+ }
+
+ return jresp;
+}
+
+STATIC json_object* ping (AFB_request *request) { /* AFB_SESSION_NONE */
+ return jsonNewMessage(AFB_SUCCESS, "Ping Binder Daemon - Radio API");
+}
+
+STATIC AFB_restapi pluginApis[]= {
+ {"init" , AFB_SESSION_CHECK, (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"},
+ {"play" , AFB_SESSION_CHECK, (AFB_apiCB)play , "Audio API - play"},
+ {"ping" , AFB_SESSION_NONE, (AFB_apiCB)ping , "Audio API - ping"},
{NULL}
};
-PUBLIC AFB_plugin *alsaRegister () {
- AFB_plugin *plugin = malloc (sizeof (AFB_plugin));
- plugin->type = AFB_PLUGIN_JSON;
- plugin->info = "Application Framework Binder Service";
- plugin->prefix= "alsa";
- plugin->apis = pluginApis;
+PUBLIC AFB_plugin *pluginRegister () {
+ 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 = (AFB_freeCtxCB)freeAudio;
+
return (plugin);
-};
\ No newline at end of file
+};