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8983cce9f6
We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
130 lines
4.4 KiB
C
130 lines
4.4 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, 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/gstcaps.h>
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#include <gst/gstplugin.h>
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#include <gst/gstpluginfeature.h>
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G_BEGIN_DECLS
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#define GST_TYPE_TYPE_FIND (gst_type_find_get_type())
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typedef struct _GstTypeFind GstTypeFind;
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/**
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* GstTypeFindFunction:
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* @find: A #GstTypeFind structure
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* @user_data: optional data to pass to the function
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*
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* A function that will be called by typefinding.
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*/
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typedef void (* GstTypeFindFunction) (GstTypeFind *find, gpointer user_data);
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/**
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* GstTypeFindProbability:
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* @GST_TYPE_FIND_NONE: type undetected.
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* @GST_TYPE_FIND_MINIMUM: unlikely typefind.
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* @GST_TYPE_FIND_POSSIBLE: possible type detected.
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* @GST_TYPE_FIND_LIKELY: likely a type was detected.
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* @GST_TYPE_FIND_NEARLY_CERTAIN: nearly certain that a type was detected.
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* @GST_TYPE_FIND_MAXIMUM: very certain a type was detected.
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*
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* The probability of the typefind function. Higher values have more certainty
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* in doing a reliable typefind.
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*/
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typedef enum {
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GST_TYPE_FIND_NONE = 0,
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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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/**
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* GstTypeFind:
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* @peek: Method to peek data.
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* @suggest: Method to suggest #GstCaps with a given probability.
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* @data: The data used by the caller of the typefinding function.
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* @get_length: Returns the length of current data.
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*
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* Object that stores typefind callbacks. To use with #GstTypeFindFactory.
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*/
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struct _GstTypeFind {
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/* private to the caller of the typefind function */
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const 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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gpointer _gst_reserved[GST_PADDING];
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};
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GST_API
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GType gst_type_find_get_type (void);
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/* typefind function interface */
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GST_API
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const guint8 * gst_type_find_peek (GstTypeFind * find,
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gint64 offset,
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guint size);
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GST_API
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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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GST_API
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void gst_type_find_suggest_simple (GstTypeFind * find,
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guint probability,
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const char * media_type,
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const char * fieldname, ...);
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GST_API
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guint64 gst_type_find_get_length (GstTypeFind * find);
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/* registration interface */
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GST_API
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gboolean gst_type_find_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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const gchar * extensions,
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GstCaps * possible_caps,
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gpointer data,
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GDestroyNotify data_notify);
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G_END_DECLS
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#endif /* __GST_TYPE_FIND_H__ */
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