/* * GStreamer * Copyright (C) 2008 Filippo Argiolas * * 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. */ /** * SECTION:element-gleffects. * @title: gleffects. * * GL Shading Language effects. * * ## Examples * |[ * gst-launch-1.0 videotestsrc ! glupload ! gleffects effect=5 ! glimagesink * ]| * FBO (Frame Buffer Object) and GLSL (OpenGL Shading Language) are required. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstgleffects.h" #define GST_CAT_DEFAULT gst_gl_effects_debug GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); enum { PROP_0 = 0x0, PROP_EFFECT = 0x1 << 1, PROP_HSWAP = 0x1 << 2, PROP_INVERT = 0x1 << 3 }; #define DEBUG_INIT \ GST_DEBUG_CATEGORY_INIT (gst_gl_effects_debug, "gleffects", 0, "gleffects element"); #define gst_gl_effects_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstGLEffects, gst_gl_effects, GST_TYPE_GL_FILTER, DEBUG_INIT); static void gst_gl_effects_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_gl_effects_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static gboolean gst_gl_effects_init_resources (GstBaseTransform * trans); static gboolean gst_gl_effects_reset_resources (GstBaseTransform * trans); static gboolean gst_gl_effects_on_init_gl_context (GstGLFilter * filter); static void gst_gl_effects_ghash_func_clean (gpointer key, gpointer value, gpointer data); static gboolean gst_gl_effects_filter_texture (GstGLFilter * filter, GstGLMemory * in_tex, GstGLMemory * out_tex); static gboolean gst_gl_effects_filters_is_property_supported (const GstGLEffectsFilterDescriptor *, gint property); /* dont' forget to edit the following when a new effect is added */ typedef enum { GST_GL_EFFECT_IDENTITY, GST_GL_EFFECT_MIRROR, GST_GL_EFFECT_SQUEEZE, GST_GL_EFFECT_STRETCH, GST_GL_EFFECT_TUNNEL, GST_GL_EFFECT_FISHEYE, GST_GL_EFFECT_TWIRL, GST_GL_EFFECT_BULGE, GST_GL_EFFECT_SQUARE, GST_GL_EFFECT_HEAT, GST_GL_EFFECT_SEPIA, GST_GL_EFFECT_XPRO, GST_GL_EFFECT_LUMA_XPRO, GST_GL_EFFECT_XRAY, GST_GL_EFFECT_SIN, GST_GL_EFFECT_GLOW, GST_GL_EFFECT_SOBEL, GST_GL_EFFECT_BLUR, GST_GL_EFFECT_LAPLACIAN, GST_GL_N_EFFECTS } GstGLEffectsEffect; static const GEnumValue * gst_gl_effects_get_effects (void) { static const GEnumValue effect_types[] = { {GST_GL_EFFECT_IDENTITY, "Do nothing Effect", "identity"}, {GST_GL_EFFECT_MIRROR, "Mirror Effect", "mirror"}, {GST_GL_EFFECT_SQUEEZE, "Squeeze Effect", "squeeze"}, {GST_GL_EFFECT_STRETCH, "Stretch Effect", "stretch"}, {GST_GL_EFFECT_TUNNEL, "Light Tunnel Effect", "tunnel"}, {GST_GL_EFFECT_FISHEYE, "FishEye Effect", "fisheye"}, {GST_GL_EFFECT_TWIRL, "Twirl Effect", "twirl"}, {GST_GL_EFFECT_BULGE, "Bulge Effect", "bulge"}, {GST_GL_EFFECT_SQUARE, "Square Effect", "square"}, {GST_GL_EFFECT_HEAT, "Heat Signature Effect", "heat"}, {GST_GL_EFFECT_SEPIA, "Sepia Toning Effect", "sepia"}, {GST_GL_EFFECT_XPRO, "Cross Processing Effect", "xpro"}, {GST_GL_EFFECT_LUMA_XPRO, "Luma Cross Processing Effect", "lumaxpro"}, {GST_GL_EFFECT_XRAY, "Glowing negative effect", "xray"}, {GST_GL_EFFECT_SIN, "All Grey but Red Effect", "sin"}, {GST_GL_EFFECT_GLOW, "Glow Lighting Effect", "glow"}, {GST_GL_EFFECT_SOBEL, "Sobel edge detection Effect", "sobel"}, {GST_GL_EFFECT_BLUR, "Blur with 9x9 separable convolution Effect", "blur"}, {GST_GL_EFFECT_LAPLACIAN, "Laplacian Convolution Demo Effect", "laplacian"}, {0, NULL, NULL} }; return effect_types; } #define GST_TYPE_GL_EFFECTS_EFFECT (gst_gl_effects_effect_get_type ()) static GType gst_gl_effects_effect_get_type (void) { static GType gl_effects_effect_type = 0; if (!gl_effects_effect_type) { gl_effects_effect_type = g_enum_register_static ("GstGLEffectsEffect", gst_gl_effects_get_effects ()); } return gl_effects_effect_type; } static void gst_gl_effects_set_effect (GstGLEffects * effects, gint effect_type) { GstGLBaseFilterClass *filter_class = GST_GL_BASE_FILTER_GET_CLASS (effects); switch (effect_type) { case GST_GL_EFFECT_IDENTITY: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_identity; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_MIRROR: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_mirror; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_SQUEEZE: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_squeeze; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_STRETCH: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_stretch; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_TUNNEL: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_tunnel; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_FISHEYE: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_fisheye; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_TWIRL: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_twirl; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_BULGE: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_bulge; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_SQUARE: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_square; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_HEAT: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_heat; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_SEPIA: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_sepia; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_XPRO: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_xpro; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_LUMA_XPRO: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_luma_xpro; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_SIN: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_sin; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_XRAY: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_xray; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_GLOW: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_glow; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_SOBEL: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_sobel; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_BLUR: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_blur; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; case GST_GL_EFFECT_LAPLACIAN: effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_laplacian; filter_class->supported_gl_api = GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3; effects->current_effect = effect_type; break; default: g_assert_not_reached (); } effects->current_effect = effect_type; } /* init resources that need a gl context */ static gboolean gst_gl_effects_gl_start (GstGLBaseFilter * base_filter) { GstGLEffects *effects = GST_GL_EFFECTS (base_filter); GstGLFilter *filter = GST_GL_FILTER (base_filter); GstGLContext *context = base_filter->context; GstGLBaseMemoryAllocator *base_alloc; GstGLAllocationParams *params; gint i; if (!GST_GL_BASE_FILTER_CLASS (parent_class)->gl_start (base_filter)) return FALSE; base_alloc = (GstGLBaseMemoryAllocator *) gst_allocator_find (GST_GL_MEMORY_ALLOCATOR_NAME); params = (GstGLAllocationParams *) gst_gl_video_allocation_params_new (context, NULL, &filter->out_info, 0, NULL, GST_GL_TEXTURE_TARGET_2D, GST_GL_RGBA); for (i = 0; i < NEEDED_TEXTURES; i++) { if (effects->midtexture[i]) gst_memory_unref (GST_MEMORY_CAST (effects->midtexture[i])); effects->midtexture[i] = (GstGLMemory *) gst_gl_base_memory_alloc (base_alloc, params); } gst_object_unref (base_alloc); gst_gl_allocation_params_free (params); return TRUE; } /* free resources that need a gl context */ static void gst_gl_effects_gl_stop (GstGLBaseFilter * base_filter) { GstGLEffects *effects = GST_GL_EFFECTS (base_filter); const GstGLFuncs *gl = base_filter->context->gl_vtable; gint i = 0; for (i = 0; i < NEEDED_TEXTURES; i++) { gst_memory_unref (GST_MEMORY_CAST (effects->midtexture[i])); } for (i = 0; i < GST_GL_EFFECTS_N_CURVES; i++) { gl->DeleteTextures (1, &effects->curve[i]); effects->curve[i] = 0; } GST_GL_BASE_FILTER_CLASS (parent_class)->gl_stop (base_filter); } static void gst_gl_effects_class_init (GstGLEffectsClass * klass) { GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gst_gl_filter_add_rgba_pad_templates (GST_GL_FILTER_CLASS (klass)); GST_BASE_TRANSFORM_CLASS (klass)->start = gst_gl_effects_init_resources; GST_BASE_TRANSFORM_CLASS (klass)->stop = gst_gl_effects_reset_resources; GST_GL_BASE_FILTER_CLASS (klass)->gl_start = gst_gl_effects_gl_start; GST_GL_BASE_FILTER_CLASS (klass)->gl_stop = gst_gl_effects_gl_stop; GST_GL_FILTER_CLASS (klass)->filter_texture = gst_gl_effects_filter_texture; GST_GL_FILTER_CLASS (klass)->init_fbo = gst_gl_effects_on_init_gl_context; klass->filter_descriptor = NULL; gst_element_class_set_metadata (element_class, "Gstreamer OpenGL Effects", "Filter/Effect/Video", "GL Shading Language effects", "Filippo Argiolas "); GST_GL_BASE_FILTER_CLASS (klass)->supported_gl_api = GST_GL_API_OPENGL | GST_GL_API_GLES2 | GST_GL_API_OPENGL3; } static void gst_gl_effects_filter_class_init (GstGLEffectsClass * klass, const GstGLEffectsFilterDescriptor * filter_descriptor) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); klass->filter_descriptor = filter_descriptor; gobject_class->set_property = gst_gl_effects_set_property; gobject_class->get_property = gst_gl_effects_get_property; /* if filterDescriptor is null it's a generic gleffects */ if (!filter_descriptor) { g_object_class_install_property (gobject_class, PROP_EFFECT, g_param_spec_enum ("effect", "Effect", "Select which effect apply to GL video texture", GST_TYPE_GL_EFFECTS_EFFECT, GST_GL_EFFECT_IDENTITY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); } else { gchar *description = g_strdup_printf ("GL Shading Language effects - %s", filter_descriptor->filter_longname); gst_element_class_set_metadata (element_class, filter_descriptor->filter_longname, "Filter/Effect/Video", description, "Filippo Argiolas "); g_free (description); } g_object_class_install_property (gobject_class, PROP_HSWAP, g_param_spec_boolean ("hswap", "Horizontal Swap", "Switch video texture left to right, useful with webcams", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /* FIXME: make it work on every effect */ if (gst_gl_effects_filters_is_property_supported (filter_descriptor, PROP_INVERT)) { g_object_class_install_property (gobject_class, PROP_INVERT, g_param_spec_boolean ("invert", "Invert the colors for sobel effect", "Invert colors to get dark edges on bright background when using sobel effect", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); } } static void set_horizontal_swap (GstGLEffects * effects) { #if GST_GL_HAVE_OPENGL GstGLContext *context = GST_GL_BASE_FILTER (effects)->context; const GstGLFuncs *gl = context->gl_vtable; if (gst_gl_context_get_gl_api (context) & GST_GL_API_OPENGL) { const gfloat mirrormatrix[16] = { -1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0 }; gl->MatrixMode (GL_MODELVIEW); gl->LoadMatrixf (mirrormatrix); } #endif } static void gst_gl_effects_init (GstGLEffects * effects) { effects->horizontal_swap = FALSE; effects->invert = FALSE; effects->effect = gst_gl_effects_identity; } static void gst_gl_effects_filter_init (GstGLEffects * effects) { gst_gl_effects_set_effect (effects, GST_GL_EFFECTS_GET_CLASS (effects)->filter_descriptor->effect); } static void gst_gl_effects_ghash_func_clean (gpointer key, gpointer value, gpointer data) { GstGLShader *shader = (GstGLShader *) value; gst_object_unref (shader); value = NULL; } static gboolean gst_gl_effects_reset_resources (GstBaseTransform * trans) { GstGLEffects *effects = GST_GL_EFFECTS (trans); /* release shaders in the gl thread */ g_hash_table_foreach (effects->shaderstable, gst_gl_effects_ghash_func_clean, effects); /* clean the htable without calling values destructors * because shaders have been released in the glthread * through the foreach func */ g_hash_table_unref (effects->shaderstable); effects->shaderstable = NULL; return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (trans); } static void gst_gl_effects_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstGLEffects *effects = GST_GL_EFFECTS (object); switch (prop_id) { case PROP_EFFECT: gst_gl_effects_set_effect (effects, g_value_get_enum (value)); break; case PROP_HSWAP: effects->horizontal_swap = g_value_get_boolean (value); break; case PROP_INVERT: effects->invert = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_gl_effects_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstGLEffects *effects = GST_GL_EFFECTS (object); switch (prop_id) { case PROP_EFFECT: g_value_set_enum (value, effects->current_effect); break; case PROP_HSWAP: g_value_set_boolean (value, effects->horizontal_swap); break; case PROP_INVERT: g_value_set_boolean (value, effects->invert); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean gst_gl_effects_init_resources (GstBaseTransform * trans) { GstGLEffects *effects = GST_GL_EFFECTS (trans); gint i; effects->shaderstable = g_hash_table_new (g_str_hash, g_str_equal); for (i = 0; i < NEEDED_TEXTURES; i++) { effects->midtexture[i] = 0; } for (i = 0; i < GST_GL_EFFECTS_N_CURVES; i++) { effects->curve[i] = 0; } return GST_BASE_TRANSFORM_CLASS (parent_class)->start (trans); } static gboolean gst_gl_effects_on_init_gl_context (GstGLFilter * filter) { return TRUE; } static gboolean gst_gl_effects_filter_texture (GstGLFilter * filter, GstGLMemory * in_tex, GstGLMemory * out_tex) { GstGLEffects *effects = GST_GL_EFFECTS (filter); effects->intexture = in_tex; effects->outtexture = out_tex; if (effects->horizontal_swap == TRUE) set_horizontal_swap (effects); effects->effect (effects); return TRUE; } GstGLShader * gst_gl_effects_get_fragment_shader (GstGLEffects * effects, const gchar * shader_name, const gchar * shader_source_gles2) { GstGLShader *shader = NULL; GstGLFilter *filter = GST_GL_FILTER (effects); GstGLContext *context = GST_GL_BASE_FILTER (filter)->context; shader = g_hash_table_lookup (effects->shaderstable, shader_name); if (!shader) { GError *error = NULL; if (!(shader = gst_gl_shader_new_link_with_stages (context, &error, gst_glsl_stage_new_default_vertex (context), gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER, GST_GLSL_VERSION_NONE, GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY, shader_source_gles2), NULL))) { GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND, ("Failed to initialize %s shader", shader_name), (NULL)); } filter->draw_attr_position_loc = gst_gl_shader_get_attribute_location (shader, "a_position"); filter->draw_attr_texture_loc = gst_gl_shader_get_attribute_location (shader, "a_texcoord"); } g_hash_table_insert (effects->shaderstable, (gchar *) shader_name, shader); return shader; } static const GstGLEffectsFilterDescriptor * gst_gl_effects_filters_supported_properties (void) { /* Horizontal swap property is supported by all filters */ static const GstGLEffectsFilterDescriptor effects[] = { {GST_GL_EFFECT_SOBEL, PROP_INVERT, NULL}, {GST_GL_EFFECT_LAPLACIAN, PROP_INVERT, NULL}, {0, 0, NULL} }; return effects; } static inline gboolean gst_gl_effects_filters_is_property_supported (const GstGLEffectsFilterDescriptor * descriptor, gint property) { /* generic filter (NULL descriptor) supports all properties */ return !descriptor || (descriptor->supported_properties & property); } static const GstGLEffectsFilterDescriptor * gst_gl_effects_filters_descriptors (void) { static GstGLEffectsFilterDescriptor *descriptors = NULL; if (!descriptors) { const GEnumValue *e; const GEnumValue *effect = gst_gl_effects_get_effects (); const GstGLEffectsFilterDescriptor *defined; guint n_filters = 0, i; for (e = effect; NULL != e->value_nick; ++e, ++n_filters) { } descriptors = g_new0 (GstGLEffectsFilterDescriptor, n_filters + 1); for (i = 0; i < n_filters; ++i, ++effect) { descriptors[i].effect = effect->value; descriptors[i].filter_name = effect->value_nick; descriptors[i].filter_longname = effect->value_name; } for (defined = gst_gl_effects_filters_supported_properties (); 0 != defined->supported_properties; ++defined) { for (i = 0; i < n_filters; ++i) { if (descriptors[i].effect == defined->effect) { descriptors[i].supported_properties = defined->supported_properties; break; } } if (i >= n_filters) { GST_WARNING ("Could not match gstgleffects-%s descriptor", defined->filter_name); } } } return descriptors; } gboolean gst_gl_effects_register_filters (GstPlugin * plugin, GstRank rank) { static volatile gsize registered = 0; if (g_once_init_enter (®istered)) { GTypeInfo info = { sizeof (GstGLEffectsClass), NULL, NULL, (GClassInitFunc) gst_gl_effects_filter_class_init, NULL, NULL, sizeof (GstGLEffects), 0, NULL }; GType generic_type = g_type_register_static (GST_TYPE_GL_EFFECTS, "GstGLEffectsGeneric", &info, 0); if (gst_element_register (plugin, "gleffects", rank, generic_type)) { const GstGLEffectsFilterDescriptor *filters; for (filters = gst_gl_effects_filters_descriptors (); NULL != filters->filter_name; ++filters) { gchar *name = g_strdup_printf ("gleffects_%s", filters->filter_name); GTypeInfo info = { sizeof (GstGLEffectsClass), NULL, NULL, (GClassInitFunc) gst_gl_effects_filter_class_init, NULL, filters, sizeof (GstGLEffects), 0, (GInstanceInitFunc) gst_gl_effects_filter_init }; GType type = g_type_register_static (GST_TYPE_GL_EFFECTS, name, &info, 0); if (!gst_element_register (plugin, name, rank, type)) { GST_WARNING ("Could not register %s", name); } g_free (name); } } g_once_init_leave (®istered, generic_type); } return registered; }