[gst-cvs] gst-plugins-bad: mxf: Add example application to output the structural metadata tree into a GtkTreeView
Sebastian Dröge
slomo at kemper.freedesktop.org
Thu Feb 26 09:47:36 PST 2009
Module: gst-plugins-bad
Branch: master
Commit: 47db2fe54765edf47e8f3fb3a6275dade64f20c9
URL: http://cgit.freedesktop.org/gstreamer/gst-plugins-bad/commit/?id=47db2fe54765edf47e8f3fb3a6275dade64f20c9
Author: Sebastian Dröge <sebastian.droege at collabora.co.uk>
Date: Thu Feb 26 18:46:00 2009 +0100
mxf: Add example application to output the structural metadata tree into a GtkTreeView
---
configure.ac | 1 +
tests/examples/mxf/.gitignore | 1 +
tests/examples/mxf/Makefile.am | 8 +
tests/examples/mxf/mxfdemux-structure.c | 241 +++++++++++++++++++++++++++++++
4 files changed, 251 insertions(+), 0 deletions(-)
diff --git a/configure.ac b/configure.ac
index 12633c6..b7542fb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1497,6 +1497,7 @@ sys/winks/Makefile
sys/winscreencap/Makefile
tests/examples/Makefile
tests/examples/directfb/Makefile
+tests/examples/mxf/Makefile
tests/examples/scaletempo/Makefile
tests/examples/switch/Makefile
ext/amrwb/Makefile
diff --git a/tests/examples/mxf/.gitignore b/tests/examples/mxf/.gitignore
new file mode 100644
index 0000000..3246be4
--- /dev/null
+++ b/tests/examples/mxf/.gitignore
@@ -0,0 +1 @@
+mxfdemux-structure
diff --git a/tests/examples/mxf/Makefile.am b/tests/examples/mxf/Makefile.am
new file mode 100644
index 0000000..f3099ee
--- /dev/null
+++ b/tests/examples/mxf/Makefile.am
@@ -0,0 +1,8 @@
+noinst_PROGRAMS = mxfdemux-structure
+
+mxfdemux_structure_SOURCES = mxfdemux-structure.c
+mxfdemux_structure_CFLAGS = $(GST_CFLAGS) $(GTK_CFLAGS)
+mxfdemux_structure_LDFLAGS = $(GST_LIBS) $(GTK_LIBS)
+
+noinst_HEADERS =
+
diff --git a/tests/examples/mxf/mxfdemux-structure.c b/tests/examples/mxf/mxfdemux-structure.c
new file mode 100644
index 0000000..0678ad5
--- /dev/null
+++ b/tests/examples/mxf/mxfdemux-structure.c
@@ -0,0 +1,241 @@
+/* GStreamer
+ * Copyright (C) <2008> Sebastian Dröge <sebastian.droege at 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, 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)
+{
+ if (G_VALUE_TYPE (val) == GST_TYPE_BUFFER) {
+ const GstBuffer *buf = gst_value_get_buffer (val);
+ gchar *ret = g_base64_encode (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
+
+ return ret;
+ } else {
+ GValue s = { 0, };
+ gchar *ret;
+
+ g_value_init (&s, G_TYPE_STRING);
+
+ if (!g_value_transform (val, &s)) {
+ return NULL;
+ }
+
+ 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 void
+on_message (GstBus * bus, GstMessage * message, gpointer data)
+{
+ switch (GST_MESSAGE_TYPE (message)) {
+ case GST_MESSAGE_WARNING:
+ case GST_MESSAGE_ERROR:
+ g_error ("Got error");
+ 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_free (tags);
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+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_pad_link (pad, sinkpad);
+
+ gst_object_unref (sinkpad);
+ gst_object_unref (bin);
+}
+
+gint
+main (gint argc, gchar ** 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;
+ }
+
+ if (!g_thread_supported ())
+ g_thread_init (NULL);
+
+ gst_init (NULL, NULL);
+ gtk_init (NULL, NULL);
+
+ 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_signal_watch (bus);
+ g_signal_connect (bus, "message", G_CALLBACK (on_message), 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);
+
+ gst_element_set_state (pipeline, GST_STATE_PLAYING);
+
+ gtk_main ();
+
+ gst_element_set_state (pipeline, GST_STATE_NULL);
+ gst_object_unref (pipeline);
+
+ return 0;
+}
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