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/*
* Clutter-GStreamer.
*
* GStreamer integration library for Clutter.
*
* clutter-gst-util.c - Miscellaneous functions.
*
* Authored By Matthew Allum <mallum@openedhand.com>
* Authored By Damien Lespiau <damien.lespiau@intel.com>
*
* Copyright (C) 2006 OpenedHand
* Copyright (C) 2009 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*/
/**
* SECTION:clutter-gst-util
* @short_description: Utility functions for Clutter-Gst.
*
* The <application>Clutter-Gst</application> library should be initialized
* with clutter_gst_init() before it can be used. You should pass pointers to
* the main argc and argv variables so that GStreamer, Clutter and Clutter-Gst
* gst can process their own command line options, as shown in the following
* example:
*
* <example>
* <title>Initializing the Clutter-Gst library</title>
* <programlisting language="c">
* int
* main (int argc, char *argv[])
* {
* // initialize the Clutter-Gst library
* clutter_gst_init (&argc, &argv);
* ...
* }
* </programlisting>
* </example>
*
* It's allowed to pass two NULL pointers to clutter_gst_init() in case you
* don't want to pass the command line arguments to GStreamer, Clutter and
* Clutter-Gst.
*
* You can also use a #GOptionEntry array to initialize your own parameters
* as shown in the next code fragment:
*
* <example>
* <title>Initializing the Clutter-Gst library with additional options</title>
* <programlisting language="c">
* static GOptionEntry options[] =
* {
* { "framerate", 'f', 0, G_OPTION_ARG_INT, &opt_framerate,
* "Number of frames per second", NULL },
* { "fourcc", 'o', 0, G_OPTION_ARG_STRING,
* &opt_fourcc, "Fourcc of the wanted YUV format", NULL },
* { NULL }
* };
*
* int
* main (int argc, char *argv[])
* {
* GError *error = NULL;
* gboolean result;
*
* if (!g_thread_supported ())
* g_thread_init (NULL);
*
* result = clutter_gst_init_with_args (&argc, &argv,
* " - Test YUV frames uploading",
* options, NULL, &error);
*
* if (error)
* {
* g_print ("%s\n", error->message);
* g_error_free (error);
* return EXIT_FAILURE;
* }
* ...
* }
* </programlisting>
* </example>
*/
#include <gst/gst.h>
#include <clutter/clutter.h>
#include "clutter-gst-debug.h"
#include "clutter-gst-util.h"
static gboolean clutter_gst_is_initialized = FALSE;
/**
* clutter_gst_init:
* @argc: pointer to the argument list count
* @argv: pointer to the argument list vector
*
* Utility function to initialize both Clutter and GStreamer.
*
* This function should be called before calling any other GLib functions. If
* this is not an option, your program must initialise the GLib thread system
* using g_thread_init() before any other GLib functions are called.
*
* Return value: A #ClutterInitError.
*/
ClutterInitError
clutter_gst_init (int *argc,
char ***argv)
{
ClutterInitError retval;
if (clutter_gst_is_initialized)
return CLUTTER_INIT_SUCCESS;
gst_init (argc, argv);
retval = clutter_init (argc, argv);
/* initialize debugging infrastructure */
#ifdef CLUTTER_GST_ENABLE_DEBUG
_clutter_gst_debug_init();
#endif
clutter_gst_is_initialized = TRUE;
return retval;
}
/**
* clutter_gst_init_with_args:
* @argc: a pointer to the number of command line arguments.
* @argv: a pointer to the array of command line arguments.
* @parameter_string: a string which is displayed in
* the first line of <option>--help</option> output, after
* <literal><replaceable>programname</replaceable> [OPTION...]</literal>
* @entries: a %NULL-terminated array of #GOptionEntry<!-- -->s
* describing the options of your program
* @translation_domain: a translation domain to use for translating
* the <option>--help</option> output for the options in @entries
* with gettext(), or %NULL
* @error: a return location for errors
*
* This function does the same work as clutter_gst_init(). Additionally, it
* allows you to add your own command line options, and it automatically
* generates nicely formatted --help output. Clutter's and GStreamer's
* #GOptionGroup<!-- -->s are added to the set of available options.
*
* Your program must initialise the GLib thread system using g_thread_init()
* before any other GLib functions are called.
*
* Return value: %CLUTTER_INIT_SUCCESS on success, a negative integer
* on failure.
*
* Since: 1.0
*/
ClutterInitError
clutter_gst_init_with_args (int *argc,
char ***argv,
const char *parameter_string,
GOptionEntry *entries,
const char *translation_domain,
GError **error)
{
GOptionContext *context;
gboolean res;
if (clutter_gst_is_initialized)
return CLUTTER_INIT_SUCCESS;
context = g_option_context_new (parameter_string);
g_option_context_add_group (context, gst_init_get_option_group ());
g_option_context_add_group (context, clutter_get_option_group ());
if (entries)
g_option_context_add_main_entries (context, entries, translation_domain);
res = g_option_context_parse (context, argc, argv, error);
g_option_context_free (context);
if (!res)
return CLUTTER_INIT_ERROR_INTERNAL;
/* initialize debugging infrastructure */
#ifdef CLUTTER_GST_ENABLE_DEBUG
_clutter_gst_debug_init ();
#endif
clutter_gst_is_initialized = TRUE;
return CLUTTER_INIT_SUCCESS;
}
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