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424 lines
12 KiB
C
424 lines
12 KiB
C
/* GStreamer Editing Services
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* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
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* 2009 Nokia Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION: ges.h
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* @title: Initialization
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* @short_description: GStreamer editing services initialization functions
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*
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* GES needs to be initialized after GStreamer itself. This section
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* contains the various functions to do so.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdlib.h>
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#include <ges/ges.h>
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#include "ges/gstframepositioner.h"
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#include "ges/ges-smart-adder.h"
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#include "ges/ges-smart-video-mixer.h"
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#include "ges-internal.h"
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#ifndef DISABLE_XPTV
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#include <ges/ges-pitivi-formatter.h>
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#endif
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#define GES_GNONLIN_VERSION_NEEDED_MAJOR 1
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#define GES_GNONLIN_VERSION_NEEDED_MINOR 2
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#define GES_GNONLIN_VERSION_NEEDED_MICRO 0
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GST_DEBUG_CATEGORY (_ges_debug_category);
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G_LOCK_DEFINE_STATIC (init_lock);
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/* (without holding ref) thread object for thread_self() validation
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* between init/deinit
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*/
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static GThread *initialized_thread = NULL;
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#ifndef GST_DISABLE_GST_DEBUG
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static gpointer
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init_debug_category (gpointer data)
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{
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/* initialize debugging category */
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GST_DEBUG_CATEGORY_INIT (_ges_debug_category, "ges", GST_DEBUG_FG_YELLOW,
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"GStreamer Editing Services");
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return _ges_debug_category;
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}
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GstDebugCategory *
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_ges_debug (void)
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{
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static GOnce my_once = G_ONCE_INIT;
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g_once (&my_once, init_debug_category, NULL);
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return my_once.retval;
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}
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#else
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GstDebugCategory *
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_ges_debug (void)
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{
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return NULL;
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}
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#endif
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static gboolean
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ges_init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
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GError ** error)
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{
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if (initialized_thread) {
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GST_DEBUG ("already initialized");
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return TRUE;
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}
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return TRUE;
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}
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static gboolean
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ges_init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
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GError ** error)
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{
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GESUriClipAssetClass *uriasset_klass = NULL;
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GstElementFactory *nlecomposition_factory = NULL;
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static GstValueTable gstvtable = {
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G_TYPE_NONE,
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(GstValueCompareFunc) NULL,
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(GstValueSerializeFunc) ges_marker_list_serialize,
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(GstValueDeserializeFunc) ges_marker_list_deserialize
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};
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static gboolean marker_list_registered = FALSE;
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if (initialized_thread) {
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GST_DEBUG ("already initialized ges");
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return TRUE;
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}
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uriasset_klass = g_type_class_ref (GES_TYPE_URI_CLIP_ASSET);
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_init_formatter_assets ();
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if (!_ges_uri_asset_ensure_setup (uriasset_klass)) {
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GST_ERROR ("cannot setup uri asset");
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if (error)
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*error = g_error_new (GST_CORE_ERROR, GST_CORE_ERROR_MISSING_PLUGIN,
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"Cannot initialize URI asset class.");
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goto failed;
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}
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nlecomposition_factory = gst_element_factory_find ("nlecomposition");
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if (!nlecomposition_factory) {
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GST_ERROR ("The `nlecomposition` object was not found.");
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if (error)
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*error = g_error_new (GST_CORE_ERROR, GST_CORE_ERROR_MISSING_PLUGIN,
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"The `nle` plugin is missing.");
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goto failed;
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}
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gst_object_unref (nlecomposition_factory);
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/* register clip classes with the system */
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g_type_class_ref (GES_TYPE_TEST_CLIP);
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g_type_class_ref (GES_TYPE_URI_CLIP);
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g_type_class_ref (GES_TYPE_TITLE_CLIP);
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g_type_class_ref (GES_TYPE_TRANSITION_CLIP);
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g_type_class_ref (GES_TYPE_OVERLAY_CLIP);
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g_type_class_ref (GES_TYPE_OVERLAY_TEXT_CLIP);
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g_type_class_ref (GES_TYPE_EFFECT_CLIP);
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g_type_class_ref (GES_TYPE_GROUP);
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/* Register track elements */
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g_type_class_ref (GES_TYPE_EFFECT);
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ges_asset_cache_init ();
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gst_element_register (NULL, "gesaudiomixer", 0, GES_TYPE_SMART_ADDER);
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gst_element_register (NULL, "gescompositor", 0, GES_TYPE_SMART_MIXER);
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gst_element_register (NULL, "framepositioner", 0, GST_TYPE_FRAME_POSITIONNER);
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gst_element_register (NULL, "gespipeline", 0, GES_TYPE_PIPELINE);
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/* TODO: user-defined types? */
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initialized_thread = g_thread_self ();
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g_type_class_unref (uriasset_klass);
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if (!marker_list_registered) {
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gstvtable.type = GES_TYPE_MARKER_LIST;
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gst_value_register (&gstvtable);
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marker_list_registered = TRUE;
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}
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GST_DEBUG ("GStreamer Editing Services initialized");
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return TRUE;
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failed:
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if (uriasset_klass)
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g_type_class_unref (uriasset_klass);
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GST_ERROR ("Could not initialize GES.");
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return FALSE;
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}
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/**
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* ges_init:
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*
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* Initialize the GStreamer Editing Service. Call this before any usage of
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* GES. You should take care of initilizing GStreamer before calling this
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* function.
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*
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* MT safety.
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* GStreamer Editing Services do not guarantee MT safety.
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* An application is required to use GES APIs (including ges_deinit())
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* in the thread where ges_init() was called.
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*/
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gboolean
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ges_init (void)
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{
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gboolean ret;
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G_LOCK (init_lock);
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ges_init_pre (NULL, NULL, NULL, NULL);
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ret = ges_init_post (NULL, NULL, NULL, NULL);
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G_UNLOCK (init_lock);
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return ret;
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}
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/**
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* ges_deinit:
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*
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* Clean up any resources created by GES in ges_init().
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*
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* It is normally not needed to call this function in a normal application as the
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* resources will automatically be freed when the program terminates.
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* This function is therefore mostly used by testsuites and other memory profiling tools.
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* This function should be called from the thread where ges_init() was called.
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*
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* After this call GES should not be used until another ges_init() call.
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*/
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void
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ges_deinit (void)
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{
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G_LOCK (init_lock);
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GST_INFO ("deinitializing GES");
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if (!initialized_thread) {
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GST_DEBUG ("nothing to deinitialize");
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G_UNLOCK (init_lock);
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return;
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}
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/* Allow deinit only from a thread where ges_init() was called */
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g_assert (initialized_thread == g_thread_self ());
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_ges_uri_asset_cleanup ();
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g_type_class_unref (g_type_class_peek (GES_TYPE_TEST_CLIP));
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g_type_class_unref (g_type_class_peek (GES_TYPE_URI_CLIP));
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g_type_class_unref (g_type_class_peek (GES_TYPE_TITLE_CLIP));
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g_type_class_unref (g_type_class_peek (GES_TYPE_TRANSITION_CLIP));
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g_type_class_unref (g_type_class_peek (GES_TYPE_OVERLAY_CLIP));
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g_type_class_unref (g_type_class_peek (GES_TYPE_OVERLAY_TEXT_CLIP));
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g_type_class_unref (g_type_class_peek (GES_TYPE_EFFECT_CLIP));
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g_type_class_unref (g_type_class_peek (GES_TYPE_GROUP));
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/* Register track elements */
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g_type_class_unref (g_type_class_peek (GES_TYPE_EFFECT));
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ges_asset_cache_deinit ();
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ges_xml_formatter_deinit ();
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initialized_thread = NULL;
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G_UNLOCK (init_lock);
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GST_INFO ("deinitialized GES");
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return;
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}
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#ifndef GST_DISABLE_OPTION_PARSING
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static gboolean
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parse_goption_arg (const gchar * s_opt,
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const gchar * arg, gpointer data, GError ** err)
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{
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if (g_strcmp0 (s_opt, "--ges-version") == 0) {
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gst_print ("GStreamer Editing Services version %s\n", PACKAGE_VERSION);
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exit (0);
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} else if (g_strcmp0 (s_opt, "--ges-sample-paths") == 0) {
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ges_add_missing_uri_relocation_uri (arg, FALSE);
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} else if (g_strcmp0 (s_opt, "--ges-sample-path-recurse") == 0) {
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ges_add_missing_uri_relocation_uri (arg, TRUE);
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}
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return TRUE;
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}
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#endif
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/**
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* ges_init_get_option_group: (skip)
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*
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* Returns a #GOptionGroup with GES's argument specifications. The
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* group is set up to use standard GOption callbacks, so when using this
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* group in combination with GOption parsing methods, all argument parsing
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* and initialization is automated.
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*
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* This function is useful if you want to integrate GES with other
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* libraries that use GOption (see g_option_context_add_group() ).
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*
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* If you use this function, you should make sure you initialise the GStreamer
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* as one of the very first things in your program. That means you need to
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* use gst_init_get_option_group() and add it to the option context before
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* using the ges_init_get_option_group() result.
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*
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* Returns: (transfer full): a pointer to GES's option group.
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*/
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GOptionGroup *
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ges_init_get_option_group (void)
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{
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#ifndef GST_DISABLE_OPTION_PARSING
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GOptionGroup *group;
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static const GOptionEntry ges_args[] = {
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{"ges-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg,
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"Print the GStreamer Editing Services version",
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NULL},
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{"ges-sample-paths", 0, 0, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg,
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"List of pathes to look assets in if they were moved"},
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{"ges-sample-path-recurse", 0, 0, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg,
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"Same as above, but recursing into the folder"},
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{NULL}
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};
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group = g_option_group_new ("GES", "GStreamer Editing Services Options",
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"Show GES Options", NULL, NULL);
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g_option_group_set_parse_hooks (group, (GOptionParseFunc) ges_init_pre,
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(GOptionParseFunc) ges_init_post);
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g_option_group_add_entries (group, ges_args);
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return group;
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#else
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return NULL;
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#endif
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}
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/**
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* ges_version:
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* @major: (out): pointer to a guint to store the major version number
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* @minor: (out): pointer to a guint to store the minor version number
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* @micro: (out): pointer to a guint to store the micro version number
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* @nano: (out): pointer to a guint to store the nano version number
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*
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* Gets the version number of the GStreamer Editing Services library.
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*/
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void
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ges_version (guint * major, guint * minor, guint * micro, guint * nano)
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{
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g_return_if_fail (major);
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g_return_if_fail (minor);
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g_return_if_fail (micro);
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g_return_if_fail (nano);
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*major = GES_VERSION_MAJOR;
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*minor = GES_VERSION_MINOR;
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*micro = GES_VERSION_MICRO;
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*nano = GES_VERSION_NANO;
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}
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/**
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* ges_init_check:
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* @argc: (inout) (allow-none): pointer to application's argc
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* @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
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* @err: pointer to a #GError to which a message will be posted on error
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*
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* Initializes the GStreamer Editing Services library, setting up internal path lists,
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* and loading evrything needed.
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*
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* This function will return %FALSE if GES could not be initialized
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* for some reason.
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*
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* Returns: %TRUE if GES could be initialized.
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*/
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gboolean
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ges_init_check (int *argc, char **argv[], GError ** err)
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{
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#ifndef GST_DISABLE_OPTION_PARSING
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GOptionGroup *group;
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GOptionContext *ctx;
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#endif
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gboolean res;
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G_LOCK (init_lock);
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if (initialized_thread) {
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GST_DEBUG ("already initialized ges");
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G_UNLOCK (init_lock);
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return TRUE;
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}
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#ifndef GST_DISABLE_OPTION_PARSING
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ctx = g_option_context_new ("- GStreamer Editing Services initialization");
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g_option_context_set_ignore_unknown_options (ctx, TRUE);
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g_option_context_set_help_enabled (ctx, FALSE);
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group = ges_init_get_option_group ();
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g_option_context_add_group (ctx, group);
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res = g_option_context_parse (ctx, argc, argv, err);
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g_option_context_free (ctx);
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#endif
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if (!res) {
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G_UNLOCK (init_lock);
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return res;
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}
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ges_init_pre (NULL, NULL, NULL, NULL);
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res = ges_init_post (NULL, NULL, NULL, NULL);
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G_UNLOCK (init_lock);
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return res;
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}
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/**
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* ges_is_initialized:
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*
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* Use this function to check if GES has been initialized with ges_init()
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* or ges_init_check().
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*
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* Returns: %TRUE if initialization has been done, %FALSE otherwise.
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*
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* Since: 1.16
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*/
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gboolean
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ges_is_initialized (void)
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{
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return initialized_thread ? TRUE : FALSE;
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}
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