gstreamer/tools/gst-typefind.c

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/* GStreamer
* Copyright (C) 2003 Thomas Vander Stichele <thomas@apestaart.org>
* 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
* 2005 Andy Wingo <wingo@pobox.com>
*
* gst-typefind.c: Use GStreamer to find the type of a file
*
* 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 <string.h>
#include <locale.h>
#include "tools.h"
static void
have_type_handler (GstElement * typefind, guint probability,
const GstCaps * caps, GstCaps ** p_caps)
{
if (p_caps) {
*p_caps = gst_caps_copy (caps);
}
}
static void
typefind_file (const gchar * filename)
{
GstStateChangeReturn sret;
GstElement *pipeline;
GstElement *source;
GstElement *typefind;
GstElement *fakesink;
GstState state;
GstCaps *caps = NULL;
GDir *dir;
if ((dir = g_dir_open (filename, 0, NULL))) {
const gchar *entry;
while ((entry = g_dir_read_name (dir))) {
gchar *path;
path = g_strconcat (filename, G_DIR_SEPARATOR_S, entry, NULL);
typefind_file (path);
g_free (path);
}
g_dir_close (dir);
return;
}
pipeline = gst_pipeline_new ("pipeline");
source = gst_element_factory_make ("filesrc", "source");
g_assert (GST_IS_ELEMENT (source));
typefind = gst_element_factory_make ("typefind", "typefind");
g_assert (GST_IS_ELEMENT (typefind));
fakesink = gst_element_factory_make ("fakesink", "fakesink");
g_assert (GST_IS_ELEMENT (typefind));
gst_bin_add_many (GST_BIN (pipeline), source, typefind, fakesink, NULL);
gst_element_link_many (source, typefind, fakesink, NULL);
g_signal_connect (G_OBJECT (typefind), "have-type",
G_CALLBACK (have_type_handler), &caps);
g_object_set (source, "location", filename, NULL);
GST_DEBUG ("Starting typefinding for %s", filename);
/* typefind will only commit to PAUSED if it actually finds a type;
* otherwise the state change fails */
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PAUSED);
/* wait until state change either completes or fails */
sret = gst_element_get_state (GST_ELEMENT (pipeline), &state, NULL, -1);
switch (sret) {
case GST_STATE_CHANGE_FAILURE:{
GstMessage *msg;
GstBus *bus;
GError *err = NULL;
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
msg = gst_bus_poll (bus, GST_MESSAGE_ERROR, 0);
gst_object_unref (bus);
if (msg) {
gst_message_parse_error (msg, &err, NULL);
g_printerr ("%s - FAILED: %s\n", filename, err->message);
g_error_free (err);
gst_message_unref (msg);
} else {
g_printerr ("%s - FAILED: unknown error\n", filename);
}
break;
}
case GST_STATE_CHANGE_SUCCESS:{
if (caps) {
gchar *caps_str;
caps_str = gst_caps_to_string (caps);
g_print ("%s - %s\n", filename, caps_str);
g_free (caps_str);
gst_caps_unref (caps);
} else {
g_print ("%s - %s\n", filename, "No type found");
}
break;
}
default:
g_assert_not_reached ();
}
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
}
int
main (int argc, char *argv[])
{
gchar **filenames = NULL;
guint num, i;
GError *err = NULL;
GOptionContext *ctx;
GOptionEntry options[] = {
GST_TOOLS_GOPTION_VERSION,
{G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, NULL},
{NULL}
};
#ifdef ENABLE_NLS
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
textdomain (GETTEXT_PACKAGE);
#endif
g_set_prgname ("gst-typefind-" GST_API_VERSION);
ctx = g_option_context_new ("FILES");
g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
g_option_context_add_group (ctx, gst_init_get_option_group ());
if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
g_print ("Error initializing: %s\n", GST_STR_NULL (err->message));
exit (1);
}
g_option_context_free (ctx);
gst_tools_print_version ();
if (filenames == NULL || *filenames == NULL) {
g_print ("Please give a filename to typefind\n\n");
return 1;
}
num = g_strv_length (filenames);
for (i = 0; i < num; ++i) {
typefind_file (filenames[i]);
}
g_strfreev (filenames);
return 0;
}