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-rw-r--r--bindings/media/media-api.c331
1 files changed, 331 insertions, 0 deletions
diff --git a/bindings/media/media-api.c b/bindings/media/media-api.c
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+++ b/bindings/media/media-api.c
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+/*
+ * Copyright (C) 2016 "IoT.bzh"
+ * Author "Manuel Bachmann"
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define _GNU_SOURCE
+
+#include <string.h>
+
+#include <json-c/json.h>
+
+#include "media-api.h"
+#include "media-rygel.h"
+
+#include <afb/afb-plugin.h>
+#include <afb/afb-req-itf.h>
+
+json_object* _rygel_list (mediaCtxHandleT *);
+
+/* ------ LOCAL HELPER FUNCTIONS --------- */
+
+/* private client context creation ; default values */
+static mediaCtxHandleT* initMediaCtx () {
+
+ mediaCtxHandleT *ctx;
+
+ ctx = malloc (sizeof(mediaCtxHandleT));
+ ctx->media_server = NULL;
+ ctx->index = 0;
+
+ return ctx;
+}
+
+/* ------ PUBLIC PLUGIN FUNCTIONS --------- */
+
+static void init (struct afb_req request) { /* AFB_SESSION_CHECK */
+
+ mediaCtxHandleT *ctx = afb_req_context_get(request);
+ json_object *jresp;
+
+ /* create a private client context */
+ if (!ctx) {
+ ctx = initMediaCtx();
+ afb_req_context_set (request, ctx, free);
+ }
+
+ /* initialize server connection */
+ if (!ctx->media_server)
+ _rygel_init (ctx);
+
+ jresp = json_object_new_object ();
+ json_object_object_add (jresp, "init", json_object_new_string ("success"));
+ afb_req_success (request, jresp, "Media - Initialized");
+}
+
+static void list (struct afb_req request) { /* AFB_SESSION_CHECK */
+
+ mediaCtxHandleT *ctx = afb_req_context_get(request);
+ json_object *jresp;
+
+ /* check that context is initialized */
+ if (ctx == NULL) {
+ afb_req_fail (request, "failed", "uninitialized");
+ return;
+ }
+
+ jresp = _rygel_list (ctx);
+
+ if (!jresp) {
+ afb_req_fail (request, "failed", "no content found in media server");
+ return;
+ }
+
+ afb_req_success (request, jresp, "Media - Listed");
+}
+
+static void selecting (struct afb_req request) { /* AFB_SESSION_CHECK */
+
+ mediaCtxHandleT *ctx = afb_req_context_get(request);
+ const char *value = afb_req_value (request, "value");
+ json_object *jresp;
+ unsigned int index;
+ char index_str[5];
+
+ /* check that context is initialized */
+ if (ctx == NULL) {
+ afb_req_fail (request, "failed", "uninitialized");
+ return;
+ }
+
+ /* no "?value=" parameter : return current index */
+ if (!value) {
+ snprintf (index_str, sizeof(index_str), "%d", ctx->index);
+ jresp = json_object_new_object();
+ json_object_object_add (jresp, "index", json_object_new_string (index_str));
+ }
+
+ /* "?value=" parameter is negative */
+ else if (atoi(value) < 0) {
+ afb_req_fail (request, "failed", "chosen index cannot be negative");
+ return;
+ }
+
+ /* "?value=" parameter is positive */
+ else if (atoi(value) >= 0) {
+ index = (unsigned int) atoi(value);
+
+ if (!_rygel_select (ctx, index)) {
+ afb_req_fail (request, "failed", "chosen index superior to current media count");
+ return;
+ }
+
+ ctx->index = index;
+ jresp = json_object_new_object();
+ json_object_object_add (jresp, "index", json_object_new_string (value));
+ }
+ else
+ jresp = NULL;
+
+ afb_req_success (request, jresp, "Media - Listed");
+}
+
+static void play (struct afb_req request) { /* AFB_SESSION_CHECK */
+
+ mediaCtxHandleT *ctx = afb_req_context_get(request);
+ json_object *jresp;
+
+ /* check that context is initialized */
+ if (ctx == NULL) {
+ afb_req_fail (request, "failed", "uninitialized");
+ return;
+ }
+
+ if (!_rygel_do (ctx, PLAY, NULL)) {
+ afb_req_fail (request, "failed", "could not play chosen media");
+ return;
+ }
+
+ jresp = json_object_new_object ();
+ json_object_object_add (jresp, "play", json_object_new_string ("success"));
+ afb_req_success (request, jresp, "Media - Listed");
+}
+
+static void stop (struct afb_req request) { /* AFB_SESSION_CHECK */
+
+ mediaCtxHandleT *ctx = afb_req_context_get(request);
+ json_object *jresp;
+
+ /* check that context is initialized */
+ if (ctx == NULL) {
+ afb_req_fail (request, "failed", "uninitialized");
+ return;
+ }
+
+ if (!_rygel_do (ctx, STOP, NULL)) {
+ afb_req_fail (request, "failed", "could not stop chosen media");
+ return;
+ }
+
+ jresp = json_object_new_object ();
+ json_object_object_add (jresp, "stop", json_object_new_string ("success"));
+ afb_req_success (request, jresp, "Media - Stopped");
+}
+
+static void pausing (struct afb_req request) { /* AFB_SESSION_CHECK */
+
+ mediaCtxHandleT *ctx = afb_req_context_get(request);
+ json_object *jresp;
+
+ /* check that context is initialized */
+ if (ctx == NULL) {
+ afb_req_fail (request, "failed", "uninitialized");
+ return;
+ }
+
+ if (!_rygel_do (ctx, PAUSE, NULL)) {
+ afb_req_fail (request, "failed", "could not pause chosen media");
+ return;
+ }
+
+ jresp = json_object_new_object();
+ json_object_object_add (jresp, "pause", json_object_new_string ("success"));
+ afb_req_success (request, jresp, "Media - Paused");
+}
+
+static void seek (struct afb_req request) { /* AFB_SESSION_CHECK */
+
+ mediaCtxHandleT *ctx = afb_req_context_get(request);
+ const char *value = afb_req_value (request, "value");
+ json_object *jresp;
+
+ /* check that context is initialized */
+ if (ctx == NULL) {
+ afb_req_fail (request, "failed", "uninitialized");
+ return;
+ }
+
+ /* no "?value=" parameter : return error */
+ if (!value) {
+ afb_req_fail (request, "failed", "you must provide a time");
+ return;
+ }
+
+ if (!_rygel_do (ctx, SEEK, (char *)value)) {
+ afb_req_fail (request, "failed", "could not seek chosen media");
+ return;
+ }
+
+ jresp = json_object_new_object();
+ json_object_object_add (jresp, "seek", json_object_new_string ("success"));
+ afb_req_success (request, jresp, "Media - Sought");
+}
+
+static char *renamed_filename(struct afb_arg argfile)
+{
+ char *result;
+ const char *e = strrchr(argfile.path, '/');
+ if (e == NULL)
+ result = strdup(argfile.value);
+ else {
+ result = malloc((++e - argfile.path) + strlen(argfile.value) + 1);
+ if (result != NULL)
+ strcpy(stpncpy(result, argfile.path, e - argfile.path), argfile.value);
+ }
+ return result;
+}
+
+static void on_uploaded(struct afb_req *prequest, int status)
+{
+ struct afb_req request = afb_req_unstore(prequest);
+ struct afb_arg argfile = afb_req_get(request, "file-upload");
+ char *file = renamed_filename(argfile);
+ if (file != NULL)
+ unlink(file);
+ free(file);
+ if (status)
+ afb_req_fail (request, "failed", "expected file not received");
+ else
+ afb_req_success_f (request, NULL, "uploaded file %s", argfile.value);
+ afb_req_unref(request);
+}
+
+static void upload (struct afb_req request) { /* AFB_SESSION_CHECK */
+
+ mediaCtxHandleT *ctx = afb_req_context_get(request);
+ struct afb_req *prequest;
+ struct afb_arg argfile;
+ char *path;
+
+ /* check that context is initialized */
+ if (ctx == NULL) {
+ afb_req_fail (request, "failed", "uninitialized");
+ return;
+ }
+
+ /* get the file */
+ argfile = afb_req_get(request, "file-upload");
+ if (!argfile.value || !argfile.path) {
+ afb_req_fail (request, "failed", "expected file not received");
+ return;
+ }
+
+ /* rename the file */
+ path = renamed_filename(argfile);
+ if (path == NULL) {
+ afb_req_fail (request, "failed", "out of memory");
+ return;
+ }
+ if (rename(argfile.path, path) != 0) {
+ free(path);
+ afb_req_fail (request, "failed", "system error");
+ return;
+ }
+
+ /* for asynchronous processing */
+ prequest = afb_req_store(request);
+ if (path == NULL) {
+ unlink(path);
+ afb_req_fail (request, "failed", "out of memory");
+ }
+ else if (!_rygel_upload (ctx, path, (void*)on_uploaded, prequest)) {
+ afb_req_unref(afb_req_unstore(prequest));
+ unlink(path);
+ afb_req_fail (request, "failed", "Error when uploading file to media server... could not complete");
+ }
+ free(path);
+}
+
+static void ping (struct afb_req request) { /* AFB_SESSION_NONE */
+ afb_req_success (request, NULL, "Media - Ping succeeded");
+}
+
+
+static const struct AFB_verb_desc_v1 verbs[]= {
+ {"init" , AFB_SESSION_CHECK, init , "Media API - init" },
+ {"list" , AFB_SESSION_CHECK, list , "Media API - list" },
+ {"select" , AFB_SESSION_CHECK, selecting , "Media API - select" },
+ {"play" , AFB_SESSION_CHECK, play , "Media API - play" },
+ {"stop" , AFB_SESSION_CHECK, stop , "Media API - stop" },
+ {"pause" , AFB_SESSION_CHECK, pausing , "Media API - pause" },
+ {"seek" , AFB_SESSION_CHECK, seek , "Media API - seek" },
+// {"upload" , AFB_SESSION_CHECK, upload , "Media API - upload" },
+ {"ping" , AFB_SESSION_NONE, ping , "Media API - ping" },
+ {NULL}
+};
+
+static const struct AFB_plugin pluginDesc = {
+ .type = AFB_PLUGIN_VERSION_1,
+ .v1 = {
+ .info = "Application Framework Binder - Media plugin",
+ .prefix = "media",
+ .verbs = verbs
+ }
+};
+
+const struct AFB_plugin *pluginAfbV1Register (const struct AFB_interface *itf)
+{
+ return &pluginDesc;
+}