Add Media Plugin

Add a Media Plugin, based off Rygel (UPnP), with only an
initialization and a "list" function for now.

Signed-off-by: Manuel Bachmann <manuel.bachmann@iot.bzh>

1 files changed, 175 insertions, 0 deletions

diff --git a/plugins/media/media-rygel.c b/plugins/media/media-rygel.c
new file mode 100644
index 00000000..51d718ba
--- /dev/null
+++ b/plugins/media/media-rygel.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2016 "IoT.bzh"
+ * 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "media-api.h"
+
+/* -------------- MEDIA RYGEL IMPLEMENTATION ---------------- */
+
+/* --- PUBLIC FUNCTIONS --- */
+
+PUBLIC unsigned char _rygel_init (mediaCtxHandleT *ctx) {
+
+    GMainContext *loop;
+    GUPnPContext *context;
+    GUPnPControlPoint *control_point;
+    struct timeval tv_start, tv_now;
+
+    context = gupnp_context_new (NULL, NULL, 0, NULL);
+
+    control_point = gupnp_control_point_new (context, URN_MEDIA_SERVER);
+
+    g_signal_connect (control_point, "device-proxy-available",
+                      G_CALLBACK (_rygel_device_cb), ctx);
+
+    /* start searching for servers */
+    gssdp_resource_browser_set_active (GSSDP_RESOURCE_BROWSER (control_point), TRUE);
+
+    loop = g_main_context_default ();
+
+    /* 5 seconds should be sufficient to find Rygel */
+    gettimeofday (&tv_start, NULL);
+    gettimeofday (&tv_now, NULL);
+    while (tv_now.tv_sec - tv_start.tv_sec <= 5) {
+
+        g_main_context_iteration (loop, FALSE);
+
+        if (ctx->media_server)
+            break;
+    }
+    /* fail if we found no server */
+    if (!ctx->media_server)
+      return -1;
+
+    dev_ctx[client_count]->loop = loop;
+    dev_ctx[client_count]->context = context;
+
+    client_count++;
+
+    return 0;
+}
+
+PUBLIC void _rygel_free (mediaCtxHandleT *ctx) {
+
+    dev_ctx_T *dev_ctx_c = (dev_ctx_T*)ctx->media_server;
+
+    client_count--;
+
+    g_main_context_unref (dev_ctx_c->loop);
+    dev_ctx_c->loop = NULL;
+    dev_ctx_c->context = NULL;
+    dev_ctx_c->device_info = NULL;
+    dev_ctx_c->content_dir = NULL;
+}
+
+PUBLIC char* _rygel_list (mediaCtxHandleT *ctx) {
+
+    dev_ctx_T *dev_ctx_c = (dev_ctx_T*)ctx->media_server;
+    GUPnPServiceProxy *content_dir_proxy;
+
+    dev_ctx_c->content_res = NULL;
+    content_dir_proxy = GUPNP_SERVICE_PROXY (dev_ctx_c->content_dir);
+
+    gupnp_service_proxy_begin_action (content_dir_proxy, "Browse", _rygel_content_cb, dev_ctx_c,
+                                      "ObjectID", G_TYPE_STRING, "Filesystem",
+                                      "BrowseFlag", G_TYPE_STRING, "BrowseDirectChildren",
+                                      "Filter", G_TYPE_STRING, "@childCount",
+                                      "StartingIndex", G_TYPE_UINT, 0,
+                                      "RequestedCount", G_TYPE_UINT, 64,
+                                      "SortCriteria", G_TYPE_STRING, "",
+                                       NULL);
+
+    while (!dev_ctx_c->content_res)
+      g_main_context_iteration (dev_ctx_c->loop, FALSE);
+
+    return dev_ctx_c->content_res;
+}
+
+ /* ---- LOCAL CALLBACK FUNCTIONS ---- */
+
+STATIC void _rygel_device_cb (GUPnPControlPoint *point, GUPnPDeviceProxy *proxy,
+                                     gpointer data) {
+
+    mediaCtxHandleT *ctx = (mediaCtxHandleT*)data;
+    GUPnPDeviceInfo *device_info;
+    GUPnPServiceInfo *content_dir;
+    const char *device_name;
+
+    device_info = GUPNP_DEVICE_INFO (proxy);
+    device_name = gupnp_device_info_get_model_name (device_info);
+    content_dir = gupnp_device_info_get_service (device_info, URN_CONTENT_DIR);
+
+    if (strcmp (device_name, "Rygel") != 0)
+        return;
+    if (!content_dir)
+        return;
+
+    /* allocate the global array if it has not been not done */
+    if (!dev_ctx)
+        dev_ctx = (dev_ctx_T**) malloc (sizeof(dev_ctx_T));
+    else
+        dev_ctx = (dev_ctx_T**) realloc (dev_ctx, (client_count+1)*sizeof(dev_ctx_T));
+
+    /* create an element for the client in the global array */
+    dev_ctx[client_count] = malloc (sizeof(dev_ctx_T));
+    dev_ctx[client_count]->device_info = device_info;
+    dev_ctx[client_count]->content_dir = content_dir;
+
+    /* make the client context aware of it */
+    ctx->media_server = (void*)dev_ctx[client_count];
+}
+
+STATIC void _rygel_content_cb (GUPnPServiceProxy *content_dir, GUPnPServiceProxyAction *action,
+                                      gpointer data) {
+
+    dev_ctx_T *dev_ctx_c = (dev_ctx_T*)data;
+    GUPnPServiceProxy *content_dir_proxy = GUPNP_SERVICE_PROXY (content_dir);
+    GError *error;
+    char *result;
+    guint32 number_returned;
+    guint32 total_matches;
+    char *found;
+    char subid[33];
+
+    gupnp_service_proxy_end_action (content_dir, action, &error,
+                                    "Result", G_TYPE_STRING, &result,
+                                    "NumberReturned", G_TYPE_UINT, &number_returned,
+                                    "TotalMatches", G_TYPE_UINT, &total_matches,
+                                     NULL);
+
+    if (number_returned == 0)
+        return;
+
+    if (number_returned == 1) {
+        found = strstr (result, "id=\"");	
+        found += 4;
+        strncpy (subid, found, 32); subid[32] = '\0';
+
+	gupnp_service_proxy_begin_action (content_dir_proxy, "Browse", _rygel_content_cb, NULL,
+					  "ObjectID", G_TYPE_STRING, subid,
+					  "BrowseFlag", G_TYPE_STRING, "BrowseDirectChildren",
+					  "Filter", G_TYPE_STRING, "@childCount",
+					  "StartingIndex", G_TYPE_UINT, 0,
+					  "RequestedCount", G_TYPE_UINT, 64,
+					  "SortCriteria", G_TYPE_STRING, "",
+					   NULL);
+        return;
+    }
+
+    if (number_returned > 1)
+        dev_ctx_c->content_res = strdup (result);
+}