factory-uri: add a factory to stream any URI

Make a factory that uses uridecodebin to decode any uri and autoplug a payloader
when we have one.

gst/rtsp-server/Makefile.am

@@ -3,6 +3,7 @@ public_headers = \
 		rtsp-sdp.h \
 		rtsp-media.h \
 		rtsp-media-factory.h \
+		rtsp-media-factory-uri.h \
 		rtsp-media-mapping.h \
 		rtsp-session.h \
 		rtsp-session-pool.h \
@@ -14,6 +15,7 @@ c_sources = \
 	rtsp-sdp.c \
 	rtsp-media.c \
 	rtsp-media-factory.c \
+	rtsp-media-factory-uri.c \
 	rtsp-media-mapping.c \
 	rtsp-session.c \
 	rtsp-session-pool.c \

gst/rtsp-server/rtsp-media-factory-uri.c

@@ -0,0 +1,373 @@
+/* GStreamer
+ * Copyright (C) 2008 Wim Taymans <wim.taymans at gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "rtsp-media-factory-uri.h"
+
+#define DEFAULT_URI     NULL
+
+enum
+{
+  PROP_0,
+  PROP_URI,
+  PROP_LAST
+};
+
+static const gchar *factory_key = "GstRTSPMediaFactoryURI";
+
+GST_DEBUG_CATEGORY (rtsp_media_factory_uri_debug);
+#define GST_CAT_DEFAULT rtsp_media_factory_uri_debug
+
+static void gst_rtsp_media_factory_uri_get_property (GObject * object,
+    guint propid, GValue * value, GParamSpec * pspec);
+static void gst_rtsp_media_factory_uri_set_property (GObject * object,
+    guint propid, const GValue * value, GParamSpec * pspec);
+static void gst_rtsp_media_factory_uri_finalize (GObject * obj);
+
+static GstElement *rtsp_media_factory_uri_get_element (GstRTSPMediaFactory *
+    factory, const GstRTSPUrl * url);
+
+G_DEFINE_TYPE (GstRTSPMediaFactoryURI, gst_rtsp_media_factory_uri,
+    GST_TYPE_RTSP_MEDIA_FACTORY);
+
+static void
+gst_rtsp_media_factory_uri_class_init (GstRTSPMediaFactoryURIClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstRTSPMediaFactoryClass *mediafactory_class;
+
+  gobject_class = G_OBJECT_CLASS (klass);
+  mediafactory_class = GST_RTSP_MEDIA_FACTORY_CLASS (klass);
+
+  gobject_class->get_property = gst_rtsp_media_factory_uri_get_property;
+  gobject_class->set_property = gst_rtsp_media_factory_uri_set_property;
+  gobject_class->finalize = gst_rtsp_media_factory_uri_finalize;
+
+  /**
+   * GstRTSPMediaFactoryURI::uri
+   *
+   * The uri of the resource that will be served by this factory.
+   */
+  g_object_class_install_property (gobject_class, PROP_URI,
+      g_param_spec_string ("uri", "URI",
+          "The URI of the resource to stream", DEFAULT_URI,
+          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  mediafactory_class->get_element = rtsp_media_factory_uri_get_element;
+
+  GST_DEBUG_CATEGORY_INIT (rtsp_media_factory_uri_debug, "rtspmediafactoryuri",
+      0, "GstRTSPMediaFactoryUri");
+}
+
+static void
+gst_rtsp_media_factory_uri_init (GstRTSPMediaFactoryURI * factory)
+{
+  factory->uri = g_strdup (DEFAULT_URI);
+  factory->factories =
+      gst_element_factory_list_get_elements (GST_ELEMENT_FACTORY_TYPE_PAYLOADER,
+      GST_RANK_NONE);
+}
+
+static void
+gst_rtsp_media_factory_uri_finalize (GObject * obj)
+{
+  GstRTSPMediaFactoryURI *factory = GST_RTSP_MEDIA_FACTORY_URI (obj);
+
+  g_free (factory->uri);
+  gst_plugin_feature_list_free (factory->factories);
+
+  G_OBJECT_CLASS (gst_rtsp_media_factory_uri_parent_class)->finalize (obj);
+}
+
+static void
+gst_rtsp_media_factory_uri_get_property (GObject * object, guint propid,
+    GValue * value, GParamSpec * pspec)
+{
+  GstRTSPMediaFactoryURI *factory = GST_RTSP_MEDIA_FACTORY_URI (object);
+
+  switch (propid) {
+    case PROP_URI:
+      g_value_take_string (value, gst_rtsp_media_factory_uri_get_uri (factory));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, propid, pspec);
+  }
+}
+
+static void
+gst_rtsp_media_factory_uri_set_property (GObject * object, guint propid,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRTSPMediaFactoryURI *factory = GST_RTSP_MEDIA_FACTORY_URI (object);
+
+  switch (propid) {
+    case PROP_URI:
+      gst_rtsp_media_factory_uri_set_uri (factory, g_value_get_string (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, propid, pspec);
+  }
+}
+
+/**
+ * gst_rtsp_media_factory_uri_new:
+ *
+ * Create a new #GstRTSPMediaFactoryURI instance.
+ *
+ * Returns: a new #GstRTSPMediaFactoryURI object.
+ */
+GstRTSPMediaFactoryURI *
+gst_rtsp_media_factory_uri_new (void)
+{
+  GstRTSPMediaFactoryURI *result;
+
+  result = g_object_new (GST_TYPE_RTSP_MEDIA_FACTORY_URI, NULL);
+
+  return result;
+}
+
+/**
+ * gst_rtsp_media_factory_uri_set_uri:
+ * @factory: a #GstRTSPMediaFactory
+ * @uri: the uri the stream
+ *
+ * Set the URI of the resource that will be streamed by this factory.
+ */
+void
+gst_rtsp_media_factory_uri_set_uri (GstRTSPMediaFactoryURI * factory,
+    const gchar * uri)
+{
+  g_return_if_fail (GST_IS_RTSP_MEDIA_FACTORY_URI (factory));
+  g_return_if_fail (uri != NULL);
+
+  GST_RTSP_MEDIA_FACTORY_LOCK (factory);
+  g_free (factory->uri);
+  factory->uri = g_strdup (uri);
+  GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
+}
+
+/**
+ * gst_rtsp_media_factory_uri_get_uri:
+ * @factory: a #GstRTSPMediaFactory
+ *
+ * Get the URI that will provide media for this factory.
+ *
+ * Returns: the configured URI. g_free() after usage.
+ */
+gchar *
+gst_rtsp_media_factory_uri_get_uri (GstRTSPMediaFactoryURI * factory)
+{
+  gchar *result;
+
+  g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY_URI (factory), NULL);
+
+  GST_RTSP_MEDIA_FACTORY_LOCK (factory);
+  result = g_strdup (factory->uri);
+  GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
+
+  return result;
+}
+
+static GstElementFactory *
+find_payloader (GstRTSPMediaFactoryURI * urifact, GstCaps * caps)
+{
+  GList *list, *tmp;
+  GstElementFactory *factory = NULL;
+
+  /* find payloader that can link */
+  list = gst_element_factory_list_filter (urifact->factories, caps,
+      GST_PAD_SINK, FALSE);
+
+  for (tmp = list; tmp; tmp = g_list_next (tmp)) {
+    GstElementFactory *f = GST_ELEMENT_FACTORY_CAST (tmp->data);
+    const gchar *name;
+
+    name = gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (f));
+    if (strcmp (name, "gdppay") == 0)
+      continue;
+
+    factory = f;
+    break;
+  }
+  if (factory)
+    g_object_ref (factory);
+
+  gst_plugin_feature_list_free (list);
+
+  return factory;
+}
+
+static gboolean
+autoplug_continue_cb (GstElement * uribin, GstPad * pad, GstCaps * caps,
+    GstElement * element)
+{
+  GList *list, *tmp;
+  GstRTSPMediaFactoryURI *urifact;
+  GstElementFactory *factory;
+  gboolean res;
+
+  GST_DEBUG ("found pad %s:%s of caps %" GST_PTR_FORMAT,
+      GST_DEBUG_PAD_NAME (pad), caps);
+
+  urifact = g_object_get_data (G_OBJECT (element), factory_key);
+
+  if (!(factory = find_payloader (urifact, caps)))
+    goto no_factory;
+
+  /* we found a payloader, stop autoplugging */
+  GST_DEBUG ("found payloader factory %s",
+      gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
+  gst_object_unref (factory);
+
+  return FALSE;
+
+  /* ERRORS */
+no_factory:
+  {
+    /* no payloader, continue autoplugging */
+    GST_DEBUG ("no payloader found");
+    return TRUE;
+  }
+}
+
+static void
+pad_added_cb (GstElement * uribin, GstPad * pad, GstElement * element)
+{
+  GstRTSPMediaFactoryURI *urifact;
+  GstElementFactory *factory;
+  GstElement *payloader;
+  GstCaps *caps;
+  GstPad *sinkpad, *srcpad, *ghostpad;
+
+  GST_DEBUG ("added pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+
+  /* link the element now and expose the pad */
+  urifact = g_object_get_data (G_OBJECT (element), factory_key);
+
+  caps = gst_pad_get_caps (pad);
+  if (caps == NULL)
+    goto no_caps;
+
+  if (!(factory = find_payloader (urifact, caps)))
+    goto no_factory;
+
+  gst_caps_unref (caps);
+
+  /* we have a payloader now */
+  GST_DEBUG ("found payloader factory %s",
+      gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
+
+  payloader = gst_element_factory_create (factory, NULL);
+  if (payloader == NULL)
+    goto no_payloader;
+
+  /* add the payloader to the pipeline */
+  gst_bin_add (GST_BIN_CAST (element), payloader);
+
+  gst_element_set_state (payloader, GST_STATE_PLAYING);
+
+  /* link the pad to the sinkpad of the payloader */
+  sinkpad = gst_element_get_static_pad (payloader, "sink");
+  gst_pad_link (pad, sinkpad);
+  gst_object_unref (sinkpad);
+
+  /* now expose the srcpad of the payloader as a ghostpad with the same name
+   * as the uridecodebin pad name. */
+  srcpad = gst_element_get_static_pad (payloader, "src");
+  ghostpad = gst_ghost_pad_new (GST_PAD_NAME (pad), srcpad);
+  gst_object_unref (srcpad);
+
+  gst_pad_set_active (ghostpad, TRUE);
+  gst_element_add_pad (element, ghostpad);
+
+  return;
+
+  /* ERRORS */
+no_caps:
+  {
+    GST_WARNING ("could not get caps from pad");
+    return;
+  }
+no_factory:
+  {
+    GST_DEBUG ("no payloader found");
+    gst_caps_unref (caps);
+    return;
+  }
+no_payloader:
+  {
+    GST_ERROR ("could not create payloader from factory");
+    gst_caps_unref (caps);
+    return;
+  }
+}
+
+static void
+no_more_pads_cb (GstElement * uribin, GstElement * element)
+{
+  GST_DEBUG ("no-more-pads");
+  gst_element_no_more_pads (element);
+}
+
+static GstElement *
+rtsp_media_factory_uri_get_element (GstRTSPMediaFactory * factory,
+    const GstRTSPUrl * url)
+{
+  GstElement *topbin, *element, *uribin;
+  GstRTSPMediaFactoryURI *urifact;
+
+  urifact = GST_RTSP_MEDIA_FACTORY_URI_CAST (factory);
+
+  GST_LOG ("creating element");
+
+  topbin = gst_bin_new ("GstRTSPMediaFactoryURI");
+  g_assert (topbin != NULL);
+
+  /* our bin will dynamically expose payloaded pads */
+  element = gst_bin_new ("dynpay0");
+  g_assert (element != NULL);
+
+  uribin = gst_element_factory_make ("uridecodebin", "uribin");
+  if (uribin == NULL)
+    goto no_uridecodebin;
+
+  g_object_set (uribin, "uri", urifact->uri, NULL);
+
+  /* keep factory around */
+  g_object_set_data_full (G_OBJECT (element), factory_key,
+      g_object_ref (factory), g_object_unref);
+
+  /* connect to the signals */
+  g_signal_connect (uribin, "autoplug-continue",
+      (GCallback) autoplug_continue_cb, element);
+  g_signal_connect (uribin, "pad-added", (GCallback) pad_added_cb, element);
+  g_signal_connect (uribin, "no-more-pads", (GCallback) no_more_pads_cb,
+      element);
+
+  gst_bin_add (GST_BIN_CAST (element), uribin);
+  gst_bin_add (GST_BIN_CAST (topbin), element);
+
+  return topbin;
+
+no_uridecodebin:
+  {
+    g_critical ("can't create uridecodebin element");
+    g_object_unref (element);
+    return NULL;
+  }
+}

gst/rtsp-server/rtsp-media-factory-uri.h

@@ -0,0 +1,76 @@
+/* GStreamer
+ * Copyright (C) 2008 Wim Taymans <wim.taymans at gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <gst/gst.h>
+
+#include "rtsp-media-factory.h"
+
+#ifndef __GST_RTSP_MEDIA_FACTORY_URI_H__
+#define __GST_RTSP_MEDIA_FACTORY_URI_H__
+
+G_BEGIN_DECLS
+
+/* types for the media factory */
+#define GST_TYPE_RTSP_MEDIA_FACTORY_URI              (gst_rtsp_media_factory_uri_get_type ())
+#define GST_IS_RTSP_MEDIA_FACTORY_URI(obj)           (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_RTSP_MEDIA_FACTORY_URI))
+#define GST_IS_RTSP_MEDIA_FACTORY_URI_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_RTSP_MEDIA_FACTORY_URI))
+#define GST_RTSP_MEDIA_FACTORY_URI_GET_CLASS(obj)    (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_RTSP_MEDIA_FACTORY_URI, GstRTSPMediaFactoryURIClass))
+#define GST_RTSP_MEDIA_FACTORY_URI(obj)              (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_RTSP_MEDIA_FACTORY_URI, GstRTSPMediaFactoryURI))
+#define GST_RTSP_MEDIA_FACTORY_URI_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_RTSP_MEDIA_FACTORY_URI, GstRTSPMediaFactoryURIClass))
+#define GST_RTSP_MEDIA_FACTORY_URI_CAST(obj)         ((GstRTSPMediaFactoryURI*)(obj))
+#define GST_RTSP_MEDIA_FACTORY_URI_CLASS_CAST(klass) ((GstRTSPMediaFactoryURIClass*)(klass))
+
+typedef struct _GstRTSPMediaFactoryURI GstRTSPMediaFactoryURI;
+typedef struct _GstRTSPMediaFactoryURIClass GstRTSPMediaFactoryURIClass;
+
+/**
+ * GstRTSPMediaFactoryURI:
+ * @uri: the uri
+ *
+ * A media factory that creates a pipeline to play and uri.
+ */
+struct _GstRTSPMediaFactoryURI {
+  GstRTSPMediaFactory   parent;
+
+  gchar *uri;
+  GList *factories;
+};
+
+/**
+ * GstRTSPMediaFactoryURIClass:
+ *
+ * The #GstRTSPMediaFactoryURI class structure.
+ */
+struct _GstRTSPMediaFactoryURIClass {
+  GstRTSPMediaFactoryClass  parent_class;
+};
+
+GType                 gst_rtsp_media_factory_uri_get_type   (void);
+
+/* creating the factory */
+GstRTSPMediaFactoryURI * gst_rtsp_media_factory_uri_new     (void);
+
+/* configuring the factory */
+void                  gst_rtsp_media_factory_uri_set_uri  (GstRTSPMediaFactoryURI *factory,
+                                                           const gchar *uri);
+gchar *               gst_rtsp_media_factory_uri_get_uri  (GstRTSPMediaFactoryURI *factory);
+
+G_END_DECLS
+
+#endif /* __GST_RTSP_MEDIA_FACTORY_URI_H__ */

gst/rtsp-server/rtsp-server.h

@@ -35,6 +35,7 @@
 
 #include "rtsp-session-pool.h"
 #include "rtsp-media-mapping.h"
+#include "rtsp-media-factory-uri.h"
 #include "rtsp-client.h"
 
 #ifndef __GST_RTSP_SERVER_H__