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125 lines
4.1 KiB
C
125 lines
4.1 KiB
C
/* GStreamer
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* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
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*
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* gsttypefind.h: typefinding subsystem
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_TYPE_FIND_H__
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#define __GST_TYPE_FIND_H__
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#include <gst/gstbuffer.h>
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#include <gst/gstcaps.h>
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#include <gst/gstplugin.h>
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#include <gst/gstpluginfeature.h>
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#include <gst/gsttypes.h>
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G_BEGIN_DECLS
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#define GST_TYPE_TYPE_FIND_FACTORY (gst_type_find_factory_get_type())
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#define GST_TYPE_FIND_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_TYPE_FIND_FACTORY, GstTypeFindFactory))
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#define GST_IS_TYPE_FIND_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_TYPE_FIND_FACTORY))
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#define GST_TYPE_FIND_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_TYPE_FIND_FACTORY, GstTypeFindFactoryClass))
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#define GST_IS_TYPE_FIND_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_TYPE_FIND_FACTORY))
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#define GST_TYPE_FIND_FACTORY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_TYPE_FIND_FACTORY, GstTypeFindFactoryClass))
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typedef struct _GstTypeFind GstTypeFind;
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typedef struct _GstTypeFindFactory GstTypeFindFactory;
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typedef struct _GstTypeFindFactoryClass GstTypeFindFactoryClass;
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typedef void (* GstTypeFindFunction) (GstTypeFind *find, gpointer data);
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typedef enum {
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GST_TYPE_FIND_MINIMUM = 1,
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GST_TYPE_FIND_POSSIBLE = 50,
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GST_TYPE_FIND_LIKELY = 80,
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GST_TYPE_FIND_NEARLY_CERTAIN = 99,
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GST_TYPE_FIND_MAXIMUM = 100,
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} GstTypeFindProbability;
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struct _GstTypeFind {
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/* private to the caller of the typefind function */
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guint8 * (* peek) (gpointer data,
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gint64 offset,
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guint size);
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void (* suggest) (gpointer data,
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guint probability,
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GstCaps * caps);
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gpointer data;
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/* optional */
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guint64 (* get_length) (gpointer data);
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/* <private> */
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GST_STRUCT_PADDING
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};
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struct _GstTypeFindFactory {
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GstPluginFeature feature;
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/* <private> */
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GstTypeFindFunction function;
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gchar ** extensions;
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GstCaps * caps; /* FIXME: not yet saved in registry */
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gpointer user_data;
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GST_OBJECT_PADDING
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};
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struct _GstTypeFindFactoryClass {
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GstPluginFeatureClass parent;
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/* <private> */
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GST_CLASS_PADDING
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};
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/* typefind function interface */
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guint8 * gst_type_find_peek (GstTypeFind * find,
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gint64 offset,
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guint size);
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void gst_type_find_suggest (GstTypeFind * find,
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guint probability,
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GstCaps * caps);
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guint64 gst_type_find_get_length (GstTypeFind * find);
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/* registration interface */
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void gst_type_find_factory_register (GstPlugin * plugin,
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const gchar * name,
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guint rank,
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GstTypeFindFunction func,
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gchar ** extensions,
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GstCaps * possible_caps,
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gpointer data);
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/* typefinding interface */
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GType gst_type_find_factory_get_type (void);
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GList * gst_type_find_factory_get_list (void);
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gchar ** gst_type_find_factory_get_extensions (const GstTypeFindFactory *factory);
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GstCaps * gst_type_find_factory_get_caps (const GstTypeFindFactory *factory);
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void gst_type_find_factory_call_function (const GstTypeFindFactory *factory,
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GstTypeFind *find);
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G_END_DECLS
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#endif /* __GST_TYPE_FIND_H__ */
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