gstreamer/ges/ges.c
Nicolas Dufresne c5eae31cf7 ges: Ref the GES class to avoid later deadlock
This ensure that that all class are initialized from the main thread,
avoid class initialization in random thread, which may cause deadlocks.

https://bugzilla.gnome.org/show_bug.cgi?id=784769
2017-07-11 10:23:58 -04:00

300 lines
8.8 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
*
* 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.
*/
/* TODO
* Add a deinit function
*
* Do not forget to
* + g_ptr_array_unref (new_paths);
* + g_hash_table_unref (tried_uris);
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <ges/ges.h>
#include "ges/gstframepositioner.h"
#include "ges-internal.h"
#define GES_GNONLIN_VERSION_NEEDED_MAJOR 1
#define GES_GNONLIN_VERSION_NEEDED_MINOR 2
#define GES_GNONLIN_VERSION_NEEDED_MICRO 0
GST_DEBUG_CATEGORY (_ges_debug);
static gboolean ges_initialized = FALSE;
static gboolean
ges_init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
GError ** error)
{
/* initialize debugging category */
GST_DEBUG_CATEGORY_INIT (_ges_debug, "ges", GST_DEBUG_FG_YELLOW,
"GStreamer Editing Services");
return TRUE;
}
static gboolean
ges_init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
GError ** error)
{
GESUriClipAssetClass *uriasset_klass = NULL;
if (ges_initialized) {
GST_DEBUG ("already initialized ges");
return TRUE;
}
uriasset_klass = g_type_class_ref (GES_TYPE_URI_CLIP_ASSET);
if (!uriasset_klass || !uriasset_klass->discoverer)
goto failed;
if (!uriasset_klass->sync_discoverer)
goto failed;
/* register clip classes with the system */
g_type_class_ref (GES_TYPE_TEST_CLIP);
g_type_class_ref (GES_TYPE_URI_CLIP);
g_type_class_ref (GES_TYPE_TITLE_CLIP);
g_type_class_ref (GES_TYPE_TRANSITION_CLIP);
g_type_class_ref (GES_TYPE_OVERLAY_CLIP);
g_type_class_ref (GES_TYPE_OVERLAY_TEXT_CLIP);
g_type_class_ref (GES_TYPE_GROUP);
/* register formatter types with the system */
g_type_class_ref (GES_TYPE_PITIVI_FORMATTER);
g_type_class_ref (GES_TYPE_COMMAND_LINE_FORMATTER);
g_type_class_ref (GES_TYPE_XML_FORMATTER);
/* Register track elements */
g_type_class_ref (GES_TYPE_EFFECT);
ges_asset_cache_init ();
gst_element_register (NULL, "framepositioner", 0, GST_TYPE_FRAME_POSITIONNER);
gst_element_register (NULL, "gespipeline", 0, GES_TYPE_PIPELINE);
/* TODO: user-defined types? */
ges_initialized = TRUE;
g_type_class_unref (uriasset_klass);
GST_DEBUG ("GStreamer Editing Services initialized");
return TRUE;
failed:
if (uriasset_klass)
g_type_class_unref (uriasset_klass);
GST_ERROR ("Could not initialize GES.");
return FALSE;
}
/**
* ges_init:
*
* Initialize the GStreamer Editing Service. Call this before any usage of
* GES. You should take care of initilizing GStreamer before calling this
* function.
*/
gboolean
ges_init (void)
{
ges_init_pre (NULL, NULL, NULL, NULL);
return ges_init_post (NULL, NULL, NULL, NULL);
}
/**
* ges_deinit:
*
* Clean up any resources created by GES in ges_init().
*
* It is normally not needed to call this function in a normal application as the
* resources will automatically be freed when the program terminates.
* This function is therefore mostly used by testsuites and other memory profiling tools.
*
* After this call GES (including this method) should not be used anymore.
*/
void
ges_deinit (void)
{
_ges_uri_asset_cleanup ();
g_type_class_unref (g_type_class_peek (GES_TYPE_TEST_CLIP));
g_type_class_unref (g_type_class_peek (GES_TYPE_URI_CLIP));
g_type_class_unref (g_type_class_peek (GES_TYPE_TITLE_CLIP));
g_type_class_unref (g_type_class_peek (GES_TYPE_TRANSITION_CLIP));
g_type_class_unref (g_type_class_peek (GES_TYPE_OVERLAY_CLIP));
g_type_class_unref (g_type_class_peek (GES_TYPE_OVERLAY_TEXT_CLIP));
g_type_class_unref (g_type_class_peek (GES_TYPE_GROUP));
/* register formatter types with the system */
g_type_class_unref (g_type_class_peek (GES_TYPE_PITIVI_FORMATTER));
g_type_class_unref (g_type_class_peek (GES_TYPE_COMMAND_LINE_FORMATTER));
g_type_class_unref (g_type_class_peek (GES_TYPE_XML_FORMATTER));
/* Register track elements */
g_type_class_unref (g_type_class_peek (GES_TYPE_EFFECT));
}
#ifndef GST_DISABLE_OPTION_PARSING
static gboolean
parse_goption_arg (const gchar * s_opt,
const gchar * arg, gpointer data, GError ** err)
{
if (g_strcmp0 (s_opt, "--ges-version") == 0) {
g_print ("GStreamer Editing Services version %s\n", PACKAGE_VERSION);
exit (0);
} else if (g_strcmp0 (s_opt, "--ges-sample-paths") == 0) {
ges_add_missing_uri_relocation_uri (arg, FALSE);
} else if (g_strcmp0 (s_opt, "--ges-sample-path-recurse") == 0) {
ges_add_missing_uri_relocation_uri (arg, TRUE);
}
return TRUE;
}
#endif
/**
* ges_init_get_option_group: (skip)
*
* Returns a #GOptionGroup with GES's argument specifications. The
* group is set up to use standard GOption callbacks, so when using this
* group in combination with GOption parsing methods, all argument parsing
* and initialization is automated.
*
* This function is useful if you want to integrate GES with other
* libraries that use GOption (see g_option_context_add_group() ).
*
* If you use this function, you should make sure you initialise the GStreamer
* as one of the very first things in your program. That means you need to
* use gst_init_get_option_group() and add it to the option context before
* using the ges_init_get_option_group() result.
*
* Returns: (transfer full): a pointer to GES's option group.
*/
GOptionGroup *
ges_init_get_option_group (void)
{
#ifndef GST_DISABLE_OPTION_PARSING
GOptionGroup *group;
static const GOptionEntry ges_args[] = {
{"ges-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg,
"Print the GStreamer Editing Services version",
NULL},
{"ges-sample-paths", 0, 0, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg,
"List of pathes to look assets in if they were moved"},
{"ges-sample-path-recurse", 0, 0, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg,
"Same as above, but recursing into the folder"},
{NULL}
};
group = g_option_group_new ("GES", "GStreamer Editing Services Options",
"Show GES Options", NULL, NULL);
g_option_group_set_parse_hooks (group, (GOptionParseFunc) ges_init_pre,
(GOptionParseFunc) ges_init_post);
g_option_group_add_entries (group, ges_args);
return group;
#else
return NULL;
#endif
}
/**
* ges_version:
* @major: (out): pointer to a guint to store the major version number
* @minor: (out): pointer to a guint to store the minor version number
* @micro: (out): pointer to a guint to store the micro version number
* @nano: (out): pointer to a guint to store the nano version number
*
* Gets the version number of the GStreamer Editing Services library.
*/
void
ges_version (guint * major, guint * minor, guint * micro, guint * nano)
{
g_return_if_fail (major);
g_return_if_fail (minor);
g_return_if_fail (micro);
g_return_if_fail (nano);
*major = GES_VERSION_MAJOR;
*minor = GES_VERSION_MINOR;
*micro = GES_VERSION_MICRO;
*nano = GES_VERSION_NANO;
}
/**
* ges_init_check:
* @argc: (inout) (allow-none): pointer to application's argc
* @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
* @err: pointer to a #GError to which a message will be posted on error
*
* Initializes the GStreamer Editing Services library, setting up internal path lists,
* and loading evrything needed.
*
* This function will return %FALSE if GES could not be initialized
* for some reason.
*
* Returns: %TRUE if GES could be initialized.
*/
gboolean
ges_init_check (int *argc, char **argv[], GError ** err)
{
#ifndef GST_DISABLE_OPTION_PARSING
GOptionGroup *group;
GOptionContext *ctx;
#endif
gboolean res;
if (ges_initialized) {
GST_DEBUG ("already initialized ges");
return TRUE;
}
#ifndef GST_DISABLE_OPTION_PARSING
ctx = g_option_context_new ("- GStreamer Editing Services initialization");
g_option_context_set_ignore_unknown_options (ctx, TRUE);
g_option_context_set_help_enabled (ctx, FALSE);
group = ges_init_get_option_group ();
g_option_context_add_group (ctx, group);
res = g_option_context_parse (ctx, argc, argv, err);
g_option_context_free (ctx);
#endif
if (!res)
return res;
return ges_init ();
}