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
23 #include <stdlib.h> /* exit */
24
25 #include <gst/gst.h>
26
27 static void
pad_added_cb(GstElement * decodebin,GstPad * new_pad,GstElement * pipeline)28 pad_added_cb (GstElement * decodebin, GstPad * new_pad, GstElement * pipeline)
29 {
30 GstElement *fakesink;
31 GstPad *sinkpad;
32
33 fakesink = gst_element_factory_make ("fakesink", NULL);
34 gst_bin_add (GST_BIN (pipeline), fakesink);
35
36 sinkpad = gst_element_get_static_pad (fakesink, "sink");
37 if (GST_PAD_LINK_FAILED (gst_pad_link (new_pad, sinkpad))) {
38 g_warning ("Failed to link %s:%s to %s:%s", GST_DEBUG_PAD_NAME (new_pad),
39 GST_DEBUG_PAD_NAME (sinkpad));
40 gst_bin_remove (GST_BIN (pipeline), fakesink);
41 } else {
42 gst_element_set_state (fakesink, GST_STATE_PAUSED);
43 }
44 }
45
46 static void
show_error(const gchar * errmsg,GstBus * bus)47 show_error (const gchar * errmsg, GstBus * bus)
48 {
49 GstMessage *msg;
50 GError *err = NULL;
51 gchar *dbg = NULL;
52
53 msg = gst_bus_poll (bus, GST_MESSAGE_ERROR, 0);
54 if (msg) {
55 g_assert (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ERROR);
56
57 gst_message_parse_error (msg, &err, &dbg);
58 }
59
60 g_print ("ERROR: %s\n", errmsg);
61 g_print (" %s\n", (err) ? err->message : "");
62 if (dbg) {
63 g_print ("\ndebug: %s\n\n", dbg);
64 g_free (dbg);
65 }
66
67 if (err)
68 g_error_free (err);
69 }
70
71 gint
main(gint argc,gchar * argv[])72 main (gint argc, gchar * argv[])
73 {
74 GstElement *pipeline, *filesrc, *decodebin;
75 GstStateChangeReturn res;
76 GstIterator *it;
77 GstBus *bus;
78 GValue data = { 0, };
79
80 gst_init (&argc, &argv);
81
82 pipeline = gst_pipeline_new ("pipeline");
83
84 filesrc = gst_element_factory_make ("filesrc", "filesrc");
85 g_assert (filesrc);
86
87 decodebin = gst_element_factory_make ("decodebin", "decodebin");
88 g_assert (decodebin);
89
90 gst_bin_add_many (GST_BIN (pipeline), filesrc, decodebin, NULL);
91 gst_element_link (filesrc, decodebin);
92
93 if (argc < 2) {
94 g_print ("usage: %s <filenames>\n", argv[0]);
95 exit (-1);
96 }
97
98 if (!g_str_has_prefix (argv[1], "file://")) {
99 g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
100 } else {
101 g_object_set (G_OBJECT (filesrc), "location", argv[1] + 7, NULL);
102 }
103
104 /* we've got to connect fakesinks to newly decoded pads to make sure
105 * buffers have actually been flowing over those pads and caps have
106 * been set on them. decodebin might insert internal queues and
107 * without fakesinks it's pot-luck what caps we get from the pad, because
108 * it depends on whether the queues have started pushing buffers yet or not.
109 * With fakesinks we make sure that the pipeline doesn't go to PAUSED state
110 * before each fakesink has a buffer queued. */
111 g_signal_connect (decodebin, "pad-added",
112 G_CALLBACK (pad_added_cb), pipeline);
113
114 bus = gst_element_get_bus (pipeline);
115
116 g_print ("pause..\n");
117 res = gst_element_set_state (pipeline, GST_STATE_PAUSED);
118 if (res == GST_STATE_CHANGE_FAILURE) {
119 show_error ("Could not go to PAUSED state", bus);
120 exit (-1);
121 }
122 g_print ("waiting..\n");
123 res = gst_element_get_state (pipeline, NULL, NULL, GST_CLOCK_TIME_NONE);
124 if (res != GST_STATE_CHANGE_SUCCESS) {
125 show_error ("Failed to complete state change to PAUSED", bus);
126 exit (-1);
127 }
128 g_print ("stats..\n");
129
130 it = gst_element_iterate_src_pads (decodebin);
131 while (gst_iterator_next (it, &data) == GST_ITERATOR_OK) {
132 GstPad *pad = g_value_get_object (&data);
133 GstCaps *caps;
134 gchar *str;
135 GstQuery *query;
136
137 g_print ("stream %s:\n", GST_OBJECT_NAME (pad));
138
139 caps = gst_pad_query_caps (pad, NULL);
140 str = gst_caps_to_string (caps);
141 g_print (" caps: %s\n", str);
142 g_free (str);
143 gst_caps_unref (caps);
144
145 query = gst_query_new_duration (GST_FORMAT_TIME);
146 if (gst_pad_query (pad, query)) {
147 gint64 duration;
148
149 gst_query_parse_duration (query, NULL, &duration);
150
151 g_print (" duration: %" GST_TIME_FORMAT "\n", GST_TIME_ARGS (duration));
152 }
153 gst_query_unref (query);
154
155 g_value_reset (&data);
156 }
157 g_value_unset (&data);
158 gst_iterator_free (it);
159
160 return 0;
161 }
162