/* GStreamer

 * Copyright (C) <2006> Wim Taymans <wim@fluendo.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., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

/*

 * Unless otherwise indicated, Source Code is licensed under MIT license.

 * See further explanation attached in License Statement (distributed in the file

 * LICENSE).

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy of

 * this software and associated documentation files (the "Software"), to deal in

 * the Software without restriction, including without limitation the rights to

 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies

 * of the Software, and to permit persons to whom the Software is furnished to do

 * so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in all

 * copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 */

#include "gstrtspext.h"

GST_DEBUG_CATEGORY_STATIC (rtspext_debug);

#define GST_CAT_DEFAULT (rtspext_debug)

static GList *extensions;

static gboolean

gst_rtsp_ext_list_filter (GstPluginFeature * feature, gpointer user_data)

{

  GstElementFactory *factory;

  guint rank;

  /* we only care about element factories */

  if (!GST_IS_ELEMENT_FACTORY (feature))

    return FALSE;

  factory = GST_ELEMENT_FACTORY (feature);

  if (!gst_element_factory_has_interface (factory, "GstRTSPExtension"))

    return FALSE;

  /* only select elements with autoplugging rank */

  rank = gst_plugin_feature_get_rank (feature);

  if (rank < GST_RANK_MARGINAL)

    return FALSE;

  return TRUE;

}

void

gst_rtsp_ext_list_init (void)

{

  GST_DEBUG_CATEGORY_INIT (rtspext_debug, "rtspext", 0, "RTSP extension");

  /* get a list of all extensions */

  extensions = gst_registry_feature_filter (gst_registry_get (),

      (GstPluginFeatureFilter) gst_rtsp_ext_list_filter, FALSE, NULL);

}

GstRTSPExtensionList *

gst_rtsp_ext_list_get (void)

{

  GstRTSPExtensionList *result;

  GList *walk;

  result = g_new0 (GstRTSPExtensionList, 1);

  for (walk = extensions; walk; walk = g_list_next (walk)) {

    GstElementFactory *factory = GST_ELEMENT_FACTORY (walk->data);

    GstElement *element;

    element = gst_element_factory_create (factory, NULL);

    if (!element) {

      GST_ERROR ("could not create extension instance");

      continue;

    }

    GST_DEBUG ("added extension interface for '%s'",

        GST_ELEMENT_NAME (element));

    result->extensions = g_list_prepend (result->extensions, element);

  }

  return result;

}

void

gst_rtsp_ext_list_free (GstRTSPExtensionList * ext)

{

  GList *walk;

  for (walk = ext->extensions; walk; walk = g_list_next (walk)) {

    GstRTSPExtension *elem = (GstRTSPExtension *) walk->data;

    gst_object_unref (GST_OBJECT_CAST (elem));

  }

  g_list_free (ext->extensions);

  g_free (ext);

}

gboolean

gst_rtsp_ext_list_detect_server (GstRTSPExtensionList * ext,

    GstRTSPMessage * resp)

{

  GList *walk;

  gboolean res = TRUE;

  for (walk = ext->extensions; walk; walk = g_list_next (walk)) {

    GstRTSPExtension *elem = (GstRTSPExtension *) walk->data;

    res = gst_rtsp_extension_detect_server (elem, resp);

  }

  return res;

}

GstRTSPResult

gst_rtsp_ext_list_before_send (GstRTSPExtensionList * ext, GstRTSPMessage * req)

{

  GList *walk;

  GstRTSPResult res = GST_RTSP_OK;

  for (walk = ext->extensions; walk; walk = g_list_next (walk)) {

    GstRTSPExtension *elem = (GstRTSPExtension *) walk->data;

    res = gst_rtsp_extension_before_send (elem, req);

  }

  return res;

}

GstRTSPResult

gst_rtsp_ext_list_after_send (GstRTSPExtensionList * ext, GstRTSPMessage * req,

    GstRTSPMessage * resp)

{

  GList *walk;

  GstRTSPResult res = GST_RTSP_OK;

  for (walk = ext->extensions; walk; walk = g_list_next (walk)) {

    GstRTSPExtension *elem = (GstRTSPExtension *) walk->data;

    res = gst_rtsp_extension_after_send (elem, req, resp);

  }

  return res;

}

GstRTSPResult

gst_rtsp_ext_list_parse_sdp (GstRTSPExtensionList * ext, GstSDPMessage * sdp,

    GstStructure * s)

{

  GList *walk;

  GstRTSPResult res = GST_RTSP_OK;

  for (walk = ext->extensions; walk; walk = g_list_next (walk)) {

    GstRTSPExtension *elem = (GstRTSPExtension *) walk->data;

    res = gst_rtsp_extension_parse_sdp (elem, sdp, s);

  }

  return res;

}

GstRTSPResult

gst_rtsp_ext_list_setup_media (GstRTSPExtensionList * ext, GstSDPMedia * media)

{

  GList *walk;

  GstRTSPResult res = GST_RTSP_OK;

  for (walk = ext->extensions; walk; walk = g_list_next (walk)) {

    GstRTSPExtension *elem = (GstRTSPExtension *) walk->data;

    res = gst_rtsp_extension_setup_media (elem, media);

  }

  return res;

}

gboolean

gst_rtsp_ext_list_configure_stream (GstRTSPExtensionList * ext, GstCaps * caps)

{

  GList *walk;

  gboolean res = TRUE;

  for (walk = ext->extensions; walk; walk = g_list_next (walk)) {

    GstRTSPExtension *elem = (GstRTSPExtension *) walk->data;

    res = gst_rtsp_extension_configure_stream (elem, caps);

    if (!res)

      break;

  }

  return res;

}

GstRTSPResult

gst_rtsp_ext_list_get_transports (GstRTSPExtensionList * ext,

    GstRTSPLowerTrans protocols, gchar ** transport)

{

  GList *walk;

  GstRTSPResult res = GST_RTSP_OK;

  for (walk = ext->extensions; walk; walk = g_list_next (walk)) {

    GstRTSPExtension *elem = (GstRTSPExtension *) walk->data;

    res = gst_rtsp_extension_get_transports (elem, protocols, transport);

  }

  return res;

}

GstRTSPResult

gst_rtsp_ext_list_stream_select (GstRTSPExtensionList * ext, GstRTSPUrl * url)

{

  GList *walk;

  GstRTSPResult res = GST_RTSP_OK;

  for (walk = ext->extensions; walk; walk = g_list_next (walk)) {

    GstRTSPExtension *elem = (GstRTSPExtension *) walk->data;

    res = gst_rtsp_extension_stream_select (elem, url);

  }

  return res;

}

void

gst_rtsp_ext_list_connect (GstRTSPExtensionList * ext,

    const gchar * detailed_signal, GCallback c_handler, gpointer data)

{

  GList *walk;

  for (walk = ext->extensions; walk; walk = g_list_next (walk)) {

    GstRTSPExtension *elem = (GstRTSPExtension *) walk->data;

    g_signal_connect (elem, detailed_signal, c_handler, data);

  }

}

GstRTSPResult

gst_rtsp_ext_list_receive_request (GstRTSPExtensionList * ext,

    GstRTSPMessage * req)

{

  GList *walk;

  GstRTSPResult res = GST_RTSP_ENOTIMPL;

  for (walk = ext->extensions; walk; walk = g_list_next (walk)) {

    GstRTSPExtension *elem = (GstRTSPExtension *) walk->data;

    res = gst_rtsp_extension_receive_request (elem, req);

    if (res != GST_RTSP_ENOTIMPL)

      break;

  }

  return res;

}