gstreamer/subprojects/gst-plugins-bad/tests/examples/mxf/mxfdemux-structure.c

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/* GStreamer
* Copyright (C) <2008> Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gst/gst.h>
#include <gtk/gtk.h>
static GtkWidget *window = NULL;
static GtkTreeStore *treestore = NULL;
static gchar *
g_value_to_string (const GValue * val)
{
gchar *ret = NULL;
if (G_VALUE_TYPE (val) == GST_TYPE_BUFFER) {
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GstBuffer *buf = gst_value_get_buffer (val);
GstMapInfo map;
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gst_buffer_map (buf, &map, GST_MAP_READ);
ret = g_base64_encode (map.data, map.size);
gst_buffer_unmap (buf, &map);
} else {
GValue s = { 0, };
g_value_init (&s, G_TYPE_STRING);
if (g_value_transform (val, &s)) {
ret = g_value_dup_string (&s);
g_value_unset (&s);
}
}
return ret;
}
static gboolean
insert_field (GQuark field_id, const GValue * val, gpointer user_data)
{
GtkTreeIter *parent_iter = user_data;
GtkTreeIter iter;
const gchar *f = g_quark_to_string (field_id);
gtk_tree_store_append (treestore, &iter, parent_iter);
if (G_VALUE_TYPE (val) == GST_TYPE_ARRAY) {
guint n = gst_value_array_get_size (val);
guint i;
GtkTreeIter child_iter;
gtk_tree_store_set (treestore, &iter, 0, f, -1);
for (i = 0; i < n; i++) {
const GValue *ve = gst_value_array_get_value (val, i);
gtk_tree_store_append (treestore, &child_iter, &iter);
if (G_VALUE_TYPE (ve) == GST_TYPE_STRUCTURE) {
const GstStructure *s = gst_value_get_structure (ve);
gtk_tree_store_set (treestore, &child_iter, 0,
gst_structure_get_name (s), -1);
gst_structure_foreach (s, insert_field, &child_iter);
} else {
gchar *v = g_value_to_string (ve);
gtk_tree_store_set (treestore, &child_iter, 0, v, -1);
g_free (v);
}
}
} else if (G_VALUE_TYPE (val) == GST_TYPE_STRUCTURE) {
const GstStructure *s = gst_value_get_structure (val);
gchar *entry = g_strdup_printf ("%s: %s", f, gst_structure_get_name (s));
gtk_tree_store_set (treestore, &iter, 0, entry, -1);
g_free (entry);
gst_structure_foreach (s, insert_field, &iter);
} else {
gchar *v = g_value_to_string (val);
gchar *entry = g_strdup_printf ("%s: %s", f, v);
gtk_tree_store_set (treestore, &iter, 0, entry, -1);
g_free (v);
g_free (entry);
}
return TRUE;
}
static void
insert_structure (const GstStructure * s, GtkTreeIter * iter)
{
const gchar *name = gst_structure_get_name (s);
gtk_tree_store_set (treestore, iter, 0, name, -1);
gst_structure_foreach (s, insert_field, iter);
}
static gboolean
bus_callback (GstBus * bus, GstMessage * message, gpointer data)
{
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_WARNING:{
GError *err;
gchar *debug;
gst_message_parse_warning (message, &err, &debug);
g_print ("Warning: %s\n", err->message);
g_error_free (err);
g_free (debug);
break;
}
case GST_MESSAGE_ERROR:{
GError *err;
gchar *debug = NULL;
gst_message_parse_error (message, &err, &debug);
g_print ("Error: %s : %s\n", err->message, debug);
g_error_free (err);
g_free (debug);
gtk_main_quit ();
break;
}
case GST_MESSAGE_TAG:{
GstTagList *tags;
GValue v = { 0, };
g_print ("Got tags\n");
gst_message_parse_tag (message, &tags);
if (gst_tag_list_copy_value (&v, tags, "mxf-structure")) {
const GstStructure *s;
GtkTreeIter iter;
s = gst_value_get_structure (&v);
gtk_tree_store_append (treestore, &iter, NULL);
insert_structure (s, &iter);
gtk_widget_show_all (window);
g_value_unset (&v);
}
gst_tag_list_unref (tags);
break;
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}
default:
break;
}
return TRUE;
}
static void
on_pad_added (GstElement * src, GstPad * pad, gpointer data)
{
GstElement *fakesink = gst_element_factory_make ("fakesink", NULL);
GstPad *sinkpad = gst_element_get_static_pad (fakesink, "sink");
GstElement *bin = (GstElement *) gst_element_get_parent (src);
gst_bin_add (GST_BIN (bin), fakesink);
gst_element_sync_state_with_parent (fakesink);
gst_pad_link (pad, sinkpad);
gst_object_unref (sinkpad);
gst_object_unref (bin);
}
int
main (int argc, char **argv)
{
GstElement *pipeline, *src, *mxfdemux;
GstBus *bus;
GtkWidget *scrolled_window, *treeview;
if (argc < 2) {
g_print ("usage: %s MXF-FILE\n", argv[0]);
return -1;
}
gst_init (&argc, &argv);
gtk_init (&argc, &argv);
pipeline = gst_pipeline_new ("pipeline");
src = gst_element_factory_make ("filesrc", "src");
g_object_set (G_OBJECT (src), "location", argv[1], NULL);
mxfdemux = gst_element_factory_make ("mxfdemux", "mxfdemux");
g_signal_connect (mxfdemux, "pad-added", G_CALLBACK (on_pad_added), NULL);
if (!src || !mxfdemux) {
g_error ("Unable to create all elements");
return -2;
}
gst_bin_add_many (GST_BIN (pipeline), src, mxfdemux, NULL);
if (!gst_element_link_many (src, mxfdemux, NULL)) {
g_error ("Failed to link elements");
return -3;
}
bus = gst_element_get_bus (pipeline);
gst_bus_add_watch (bus, bus_callback, NULL);
gst_object_unref (bus);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (window), 640, 480);
g_signal_connect (window, "delete-event", gtk_main_quit, NULL);
scrolled_window = gtk_scrolled_window_new (NULL, NULL);
treestore = gtk_tree_store_new (1, G_TYPE_STRING, NULL);
treeview = gtk_tree_view_new_with_model (GTK_TREE_MODEL (treestore));
gtk_tree_view_append_column (GTK_TREE_VIEW (treeview),
gtk_tree_view_column_new_with_attributes ("Element",
gtk_cell_renderer_text_new (), "text", 0, NULL));
gtk_container_add (GTK_CONTAINER (scrolled_window), treeview);
gtk_container_add (GTK_CONTAINER (window), scrolled_window);
gtk_widget_show_all (window);
if (gst_element_set_state (pipeline,
GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) {
g_error ("Failed to change state to PLAYING");
}
gtk_main ();
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
return 0;
}