mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h> /* exit */
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#endif
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#include <gst/gst.h>
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static GMainLoop *loop;
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static void
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new_pad (GstElement * element, GstPad * pad, gboolean last, GstElement * sink)
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{
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g_print ("New pad...\n");
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}
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static void
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no_more_pads (GstElement * element)
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{
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g_print ("No more pads...\n");
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g_main_loop_quit (loop);
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}
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static gboolean
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start_finding (GstElement * pipeline)
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{
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GstStateChangeReturn res;
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g_print ("finding caps...\n");
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res = gst_element_set_state (pipeline, GST_STATE_PAUSED);
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if (res == GST_STATE_CHANGE_FAILURE) {
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g_print ("could not pause\n");
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exit (-1);
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}
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return FALSE;
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}
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static void
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dump_element_stats (GstElement * element)
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{
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GstIterator *it;
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GValue data = { 0, };
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it = gst_element_iterate_src_pads (element);
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while (gst_iterator_next (it, &data) == GST_ITERATOR_OK) {
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GstPad *pad = g_value_get_object (&data);
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GstCaps *caps;
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gchar *str;
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GstQuery *query;
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g_print ("stream %s:\n", GST_OBJECT_NAME (pad));
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caps = gst_pad_get_caps (pad, NULL);
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str = gst_caps_to_string (caps);
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g_print (" caps: %s\n", str);
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g_free (str);
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gst_caps_unref (caps);
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query = gst_query_new_duration (GST_FORMAT_TIME);
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if (gst_pad_query (pad, query)) {
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gint64 duration;
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gst_query_parse_duration (query, NULL, &duration);
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g_print (" duration: %" GST_TIME_FORMAT "\n", GST_TIME_ARGS (duration));
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}
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gst_query_unref (query);
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g_value_reset (&data);
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}
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g_value_unset (&data);
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gst_iterator_free (it);
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}
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gint
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main (gint argc, gchar * argv[])
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{
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GstElement *pipeline, *filesrc, *decodebin;
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gst_init (&argc, &argv);
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pipeline = gst_pipeline_new ("pipeline");
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filesrc = gst_element_factory_make ("filesrc", "filesrc");
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g_assert (filesrc);
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decodebin = gst_element_factory_make ("decodebin", "decodebin");
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g_assert (decodebin);
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g_signal_connect (G_OBJECT (decodebin), "new-decoded-pad",
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G_CALLBACK (new_pad), NULL);
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g_signal_connect (G_OBJECT (decodebin), "no-more-pads",
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G_CALLBACK (no_more_pads), NULL);
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gst_bin_add_many (GST_BIN (pipeline), filesrc, decodebin, NULL);
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gst_element_link (filesrc, decodebin);
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if (argc < 2) {
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g_print ("usage: %s <uri>\n", argv[0]);
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exit (-1);
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}
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g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
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/* event based programming approach */
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loop = g_main_loop_new (NULL, TRUE);
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g_idle_add ((GSourceFunc) start_finding, pipeline);
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g_main_loop_run (loop);
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dump_element_stats (decodebin);
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return 0;
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}
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