/* GStreamer

 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>

 *

 * 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 <unistd.h>

#include <stdlib.h>             /* exit */

#include <gst/gst.h>

static GMainLoop *loop;

static void

new_pad (GstElement * element, GstPad * pad, gboolean last, GstElement * sink)

{

  g_print ("New pad...\n");

}

static void

no_more_pads (GstElement * element)

{

  g_print ("No more pads...\n");

  g_main_loop_quit (loop);

}

static gboolean

start_finding (GstElement * pipeline)

{

  GstStateChangeReturn res;

  g_print ("finding caps...\n");

  res = gst_element_set_state (pipeline, GST_STATE_PAUSED);

  if (res == GST_STATE_CHANGE_FAILURE) {

    g_print ("could not pause\n");

    exit (-1);

  }

  return FALSE;

}

static void

dump_element_stats (GstElement * element)

{

  GstIterator *it;

  gpointer data;

  it = gst_element_iterate_src_pads (element);

  while (gst_iterator_next (it, &data) == GST_ITERATOR_OK) {

    GstPad *pad = GST_PAD (data);

    GstCaps *caps;

    gchar *str;

    GstQuery *query;

    g_print ("stream %s:\n", GST_OBJECT_NAME (pad));

    caps = gst_pad_get_caps (pad);

    str = gst_caps_to_string (caps);

    g_print (" caps: %s\n", str);

    g_free (str);

    gst_caps_unref (caps);

    query = gst_query_new_duration (GST_FORMAT_TIME);

    if (gst_pad_query (pad, query)) {

      gint64 duration;

      gst_query_parse_duration (query, NULL, &duration);

      g_print (" duration: %" GST_TIME_FORMAT "\n", GST_TIME_ARGS (duration));

    }

    gst_query_unref (query);

    gst_object_unref (pad);

  }

  gst_iterator_free (it);

}

gint

main (gint argc, gchar * argv[])

{

  GstElement *pipeline, *filesrc, *decodebin;

  gst_init (&argc, &argv);

  pipeline = gst_pipeline_new ("pipeline");

  filesrc = gst_element_factory_make ("filesrc", "filesrc");

  g_assert (filesrc);

  decodebin = gst_element_factory_make ("decodebin", "decodebin");

  g_assert (decodebin);

  g_signal_connect (G_OBJECT (decodebin), "new-decoded-pad",

      G_CALLBACK (new_pad), NULL);

  g_signal_connect (G_OBJECT (decodebin), "no-more-pads",

      G_CALLBACK (no_more_pads), NULL);

  gst_bin_add_many (GST_BIN (pipeline), filesrc, decodebin, NULL);

  gst_element_link (filesrc, decodebin);

  if (argc < 2) {

    g_print ("usage: %s <uri>\n", argv[0]);

    exit (-1);

  }

  g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);

  /* event based programming approach */

  loop = g_main_loop_new (NULL, TRUE);

  g_idle_add ((GSourceFunc) start_finding, pipeline);

  g_main_loop_run (loop);

  dump_element_stats (decodebin);

  return 0;

}