libs/gst/base/gsttypefindhelper.h

   1 /* GStreamer
   2  * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
   3  * Copyright (C) 2000,2005 Wim Taymans <wim@fluendo.com>
   4  * Copyright (C) 2006      Tim-Philipp Müller <tim centricular net>
   5  *
   6  * gsttypefindhelper.h:
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public
  19  * License along with this library; if not, write to the
  20  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  21  * Boston, MA 02110-1301, USA.
  22  */
  23
  24 #ifndef __GST_TYPEFINDHELPER_H__
  25 #define __GST_TYPEFINDHELPER_H__
  26
  27 #include <gst/gst.h>
  28 #include <gst/base/base-prelude.h>
  29
  30 G_BEGIN_DECLS
  31
  32 GST_BASE_API
  33 GstCaps * gst_type_find_helper (GstPad *src, guint64 size);
  34
  35 GST_BASE_API
  36 GstCaps * gst_type_find_helper_for_data   (GstObject              *obj,
  37                                            const guint8           *data,
  38                                            gsize                   size,
  39                                            GstTypeFindProbability *prob);
  40
  41 GST_BASE_API
  42 GstCaps * gst_type_find_helper_for_data_with_extension (GstObject              *obj,
  43                                                         const guint8           *data,
  44                                                         gsize                   size,
  45                                                         const gchar            *extension,
  46                                                         GstTypeFindProbability *prob);
  47
  48 GST_BASE_API
  49 GstCaps * gst_type_find_helper_for_buffer (GstObject              *obj,
  50                                            GstBuffer              *buf,
  51                                            GstTypeFindProbability *prob);
  52
  53 GST_BASE_API
  54 GstCaps * gst_type_find_helper_for_buffer_with_extension (GstObject              *obj,
  55                                                           GstBuffer              *buf,
  56                                                           const gchar            *extension,
  57                                                           GstTypeFindProbability *prob);
  58
  59 GST_BASE_API
  60 GstCaps * gst_type_find_helper_for_extension (GstObject * obj,
  61                                               const gchar * extension);
  62
  63 /**
  64  * GstTypeFindHelperGetRangeFunction:
  65  * @obj: a #GstObject that will handle the getrange request
  66  * @parent: (allow-none): the parent of @obj or %NULL
  67  * @offset: the offset of the range
  68  * @length: the length of the range
  69  * @buffer: (out): a memory location to hold the result buffer
  70  *
  71  * This function will be called by gst_type_find_helper_get_range() when
  72  * typefinding functions request to peek at the data of a stream at certain
  73  * offsets. If this function returns GST_FLOW_OK, the result buffer will be
  74  * stored in @buffer. The  contents of @buffer is invalid for any other
  75  * return value.
  76  *
  77  * This function is supposed to behave exactly like a #GstPadGetRangeFunction.
  78  *
  79  * Returns: GST_FLOW_OK for success
  80  */
  81 typedef GstFlowReturn (*GstTypeFindHelperGetRangeFunction) (GstObject  *obj,
  82                                                             GstObject  *parent,
  83                                                             guint64     offset,
  84                                                             guint       length,
  85                                                             GstBuffer **buffer);
  86 GST_BASE_API
  87 GstCaps * gst_type_find_helper_get_range (GstObject                         *obj,
  88                                           GstObject                         *parent,
  89                                           GstTypeFindHelperGetRangeFunction  func,
  90                                           guint64                            size,
  91                                           const gchar                       *extension,
  92                                           GstTypeFindProbability            *prob);
  93
  94 GST_BASE_API
  95 GstFlowReturn gst_type_find_helper_get_range_full (GstObject                         *obj,
  96                                                    GstObject                         *parent,
  97                                                    GstTypeFindHelperGetRangeFunction  func,
  98                                                    guint64                            size,
  99                                                    const gchar                       *extension,
 100                                                    GstCaps                          **caps,
 101                                                    GstTypeFindProbability            *prob);
 102
 103 G_END_DECLS
 104
 105 #endif /* __GST_TYPEFINDHELPER_H__ */