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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2000,2005 Wim Taymans <wim@fluendo.com>
* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
*
* gsttypefindhelper.h:
*
* 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.
*/
#ifndef __GST_TYPEFINDHELPER_H__
#define __GST_TYPEFINDHELPER_H__
#include <gst/gst.h>
#include <gst/base/base-prelude.h>
G_BEGIN_DECLS
GST_BASE_API
GstCaps * gst_type_find_helper (GstPad *src, guint64 size);
GST_BASE_API
GstCaps * gst_type_find_helper_for_data (GstObject *obj,
const guint8 *data,
gsize size,
GstTypeFindProbability *prob);
GST_BASE_API
GstCaps * gst_type_find_helper_for_data_with_extension (GstObject *obj,
const guint8 *data,
gsize size,
const gchar *extension,
GstTypeFindProbability *prob);
GST_BASE_API
GstCaps * gst_type_find_helper_for_buffer (GstObject *obj,
GstBuffer *buf,
GstTypeFindProbability *prob);
GST_BASE_API
GstCaps * gst_type_find_helper_for_buffer_with_extension (GstObject *obj,
GstBuffer *buf,
const gchar *extension,
GstTypeFindProbability *prob);
GST_BASE_API
GstCaps * gst_type_find_helper_for_extension (GstObject * obj,
const gchar * extension);
/**
* GstTypeFindHelperGetRangeFunction:
* @obj: a #GstObject that will handle the getrange request
* @parent: (allow-none): the parent of @obj or %NULL
* @offset: the offset of the range
* @length: the length of the range
* @buffer: (out): a memory location to hold the result buffer
*
* This function will be called by gst_type_find_helper_get_range() when
* typefinding functions request to peek at the data of a stream at certain
* offsets. If this function returns GST_FLOW_OK, the result buffer will be
* stored in @buffer. The contents of @buffer is invalid for any other
* return value.
*
* This function is supposed to behave exactly like a #GstPadGetRangeFunction.
*
* Returns: GST_FLOW_OK for success
*/
typedef GstFlowReturn (*GstTypeFindHelperGetRangeFunction) (GstObject *obj,
GstObject *parent,
guint64 offset,
guint length,
GstBuffer **buffer);
GST_BASE_API
GstCaps * gst_type_find_helper_get_range (GstObject *obj,
GstObject *parent,
GstTypeFindHelperGetRangeFunction func,
guint64 size,
const gchar *extension,
GstTypeFindProbability *prob);
GST_BASE_API
GstFlowReturn gst_type_find_helper_get_range_full (GstObject *obj,
GstObject *parent,
GstTypeFindHelperGetRangeFunction func,
guint64 size,
const gchar *extension,
GstCaps **caps,
GstTypeFindProbability *prob);
G_END_DECLS
#endif /* __GST_TYPEFINDHELPER_H__ */
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