1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19 #ifdef HAVE_CONFIG_H
20 #include "config.h"
21 #endif
22 #ifdef HAVE_UNISTD_H
23 #include <unistd.h>
24 #endif
25 #ifdef HAVE_STDLIB_H
26 #include <stdlib.h> /* exit */
27 #endif
28 #include <gst/gst.h>
29
30 static void
pad_added_cb(GstElement * decodebin,GstPad * new_pad,GstElement * pipeline)31 pad_added_cb (GstElement * decodebin, GstPad * new_pad, GstElement * pipeline)
32 {
33 GstElement *fakesink;
34 GstPad *sinkpad;
35
36 fakesink = gst_element_factory_make ("fakesink", NULL);
37 gst_bin_add (GST_BIN (pipeline), fakesink);
38
39 sinkpad = gst_element_get_static_pad (fakesink, "sink");
40 if (GST_PAD_LINK_FAILED (gst_pad_link (new_pad, sinkpad))) {
41 g_warning ("Failed to link %s:%s to %s:%s", GST_DEBUG_PAD_NAME (new_pad),
42 GST_DEBUG_PAD_NAME (sinkpad));
43 gst_bin_remove (GST_BIN (pipeline), fakesink);
44 } else {
45 gst_element_set_state (fakesink, GST_STATE_PAUSED);
46 }
47 }
48
49 static void
show_error(const gchar * errmsg,GstBus * bus)50 show_error (const gchar * errmsg, GstBus * bus)
51 {
52 GstMessage *msg;
53 GError *err = NULL;
54 gchar *dbg = NULL;
55
56 msg = gst_bus_poll (bus, GST_MESSAGE_ERROR, 0);
57 if (msg) {
58 g_assert (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ERROR);
59
60 gst_message_parse_error (msg, &err, &dbg);
61 }
62
63 g_print ("ERROR: %s\n", errmsg);
64 g_print (" %s\n", (err) ? err->message : "");
65 if (dbg) {
66 g_print ("\ndebug: %s\n\n", dbg);
67 g_free (dbg);
68 }
69
70 if (err)
71 g_error_free (err);
72 }
73
74 gint
main(gint argc,gchar * argv[])75 main (gint argc, gchar * argv[])
76 {
77 GstElement *pipeline, *filesrc, *decodebin;
78 GstStateChangeReturn res;
79 GstIterator *it;
80 GstBus *bus;
81 GValue data = { 0, };
82
83 gst_init (&argc, &argv);
84
85 pipeline = gst_pipeline_new ("pipeline");
86
87 filesrc = gst_element_factory_make ("filesrc", "filesrc");
88 g_assert (filesrc);
89
90 decodebin = gst_element_factory_make ("decodebin", "decodebin");
91 g_assert (decodebin);
92
93 gst_bin_add_many (GST_BIN (pipeline), filesrc, decodebin, NULL);
94 gst_element_link (filesrc, decodebin);
95
96 if (argc < 2) {
97 g_print ("usage: %s <filenames>\n", argv[0]);
98 exit (-1);
99 }
100
101 if (!g_str_has_prefix (argv[1], "file://")) {
102 g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
103 } else {
104 g_object_set (G_OBJECT (filesrc), "location", argv[1] + 7, NULL);
105 }
106
107 /* we've got to connect fakesinks to newly decoded pads to make sure
108 * buffers have actually been flowing over those pads and caps have
109 * been set on them. decodebin might insert internal queues and
110 * without fakesinks it's pot-luck what caps we get from the pad, because
111 * it depends on whether the queues have started pushing buffers yet or not.
112 * With fakesinks we make sure that the pipeline doesn't go to PAUSED state
113 * before each fakesink has a buffer queued. */
114 g_signal_connect (decodebin, "pad-added",
115 G_CALLBACK (pad_added_cb), pipeline);
116
117 bus = gst_element_get_bus (pipeline);
118
119 g_print ("pause..\n");
120 res = gst_element_set_state (pipeline, GST_STATE_PAUSED);
121 if (res == GST_STATE_CHANGE_FAILURE) {
122 show_error ("Could not go to PAUSED state", bus);
123 exit (-1);
124 }
125 g_print ("waiting..\n");
126 res = gst_element_get_state (pipeline, NULL, NULL, GST_CLOCK_TIME_NONE);
127 if (res != GST_STATE_CHANGE_SUCCESS) {
128 show_error ("Failed to complete state change to PAUSED", bus);
129 exit (-1);
130 }
131 g_print ("stats..\n");
132
133 it = gst_element_iterate_src_pads (decodebin);
134 while (gst_iterator_next (it, &data) == GST_ITERATOR_OK) {
135 GstPad *pad = g_value_get_object (&data);
136 GstCaps *caps;
137 gchar *str;
138 GstQuery *query;
139
140 g_print ("stream %s:\n", GST_OBJECT_NAME (pad));
141
142 caps = gst_pad_query_caps (pad, NULL);
143 str = gst_caps_to_string (caps);
144 g_print (" caps: %s\n", str);
145 g_free (str);
146 gst_caps_unref (caps);
147
148 query = gst_query_new_duration (GST_FORMAT_TIME);
149 if (gst_pad_query (pad, query)) {
150 gint64 duration;
151
152 gst_query_parse_duration (query, NULL, &duration);
153
154 g_print (" duration: %" GST_TIME_FORMAT "\n", GST_TIME_ARGS (duration));
155 }
156 gst_query_unref (query);
157
158 g_value_reset (&data);
159 }
160 g_value_unset (&data);
161 gst_iterator_free (it);
162
163 return 0;
164 }
165