mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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835 lines
25 KiB
C
835 lines
25 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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* 2002 Thomas Vander Stichele <thomas@apestaart.org>
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*
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* gstutils.h: Header for various utility functions
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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_UTILS_H__
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#define __GST_UTILS_H__
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#include <glib.h>
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#include <gst/gstbin.h>
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#include <gst/gstparse.h>
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G_BEGIN_DECLS
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void gst_util_set_value_from_string (GValue *value, const gchar *value_str);
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void gst_util_set_object_arg (GObject *object, const gchar *name, const gchar *value);
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void gst_util_dump_mem (const guchar *mem, guint size);
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guint64 gst_util_gdouble_to_guint64 (gdouble value) G_GNUC_CONST;
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gdouble gst_util_guint64_to_gdouble (guint64 value) G_GNUC_CONST;
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/**
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* gst_guint64_to_gdouble:
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* @value: the #guint64 value to convert
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*
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* Convert @value to a gdouble.
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*
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* Returns: @value converted to a #gdouble.
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*/
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/**
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* gst_gdouble_to_guint64:
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* @value: the #gdouble value to convert
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*
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* Convert @value to a guint64.
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*
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* Returns: @value converted to a #guint64.
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*/
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#ifdef WIN32
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#define gst_gdouble_to_guint64(value) gst_util_gdouble_to_guint64(value)
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#define gst_guint64_to_gdouble(value) gst_util_guint64_to_gdouble(value)
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#else
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#define gst_gdouble_to_guint64(value) ((guint64) (value))
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#define gst_guint64_to_gdouble(value) ((gdouble) (value))
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#endif
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guint64 gst_util_uint64_scale (guint64 val, guint64 num, guint64 denom);
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guint64 gst_util_uint64_scale_round (guint64 val, guint64 num, guint64 denom);
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guint64 gst_util_uint64_scale_ceil (guint64 val, guint64 num, guint64 denom);
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guint64 gst_util_uint64_scale_int (guint64 val, gint num, gint denom);
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guint64 gst_util_uint64_scale_int_round (guint64 val, gint num, gint denom);
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guint64 gst_util_uint64_scale_int_ceil (guint64 val, gint num, gint denom);
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guint32 gst_util_seqnum_next (void);
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gint32 gst_util_seqnum_compare (guint32 s1, guint32 s2);
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void gst_print_pad_caps (GString *buf, gint indent, GstPad *pad);
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void gst_print_element_args (GString *buf, gint indent, GstElement *element);
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GType gst_type_register_static_full (GType parent_type,
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const gchar *type_name,
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guint class_size,
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GBaseInitFunc base_init,
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GBaseFinalizeFunc base_finalize,
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GClassInitFunc class_init,
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GClassFinalizeFunc class_finalize,
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gconstpointer class_data,
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guint instance_size,
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guint16 n_preallocs,
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GInstanceInitFunc instance_init,
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const GTypeValueTable *value_table,
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GTypeFlags flags);
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/**
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* GST_CALL_PARENT:
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* @parent_class_cast: the name of the class cast macro for the parent type
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* @name: name of the function to call
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* @args: arguments enclosed in '( )'
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*
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* Just call the parent handler. This assumes that there is a variable
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* named parent_class that points to the (duh!) parent class. Note that
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* this macro is not to be used with things that return something, use
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* the _WITH_DEFAULT version for that
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*/
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#define GST_CALL_PARENT(parent_class_cast, name, args) \
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((parent_class_cast(parent_class)->name != NULL) ? \
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parent_class_cast(parent_class)->name args : (void) 0)
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/**
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* GST_CALL_PARENT_WITH_DEFAULT:
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* @parent_class_cast: the name of the class cast macro for the parent type
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* @name: name of the function to call
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* @args: arguments enclosed in '( )'
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* @def_return: default result
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*
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* Same as GST_CALL_PARENT(), but in case there is no implementation, it
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* evaluates to @def_return.
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*/
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#define GST_CALL_PARENT_WITH_DEFAULT(parent_class_cast, name, args, def_return)\
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((parent_class_cast(parent_class)->name != NULL) ? \
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parent_class_cast(parent_class)->name args : def_return)
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/* Define PUT and GET functions for unaligned memory */
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#define _GST_GET(__data, __idx, __size, __shift) \
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(((guint##__size) (((const guint8 *) (__data))[__idx])) << (__shift))
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#define _GST_PUT(__data, __idx, __size, __shift, __num) \
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(((guint8 *) (__data))[__idx] = (((guint##__size) (__num)) >> (__shift)) & 0xff)
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/**
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* GST_READ_UINT64_BE:
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* @data: memory location
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*
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* Read a 64 bit unsigned integer value in big endian format from the memory buffer.
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*/
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#define GST_READ_UINT64_BE(data) (_GST_GET (data, 0, 64, 56) | \
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_GST_GET (data, 1, 64, 48) | \
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_GST_GET (data, 2, 64, 40) | \
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_GST_GET (data, 3, 64, 32) | \
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_GST_GET (data, 4, 64, 24) | \
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_GST_GET (data, 5, 64, 16) | \
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_GST_GET (data, 6, 64, 8) | \
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_GST_GET (data, 7, 64, 0))
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/**
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* GST_READ_UINT64_LE:
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* @data: memory location
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*
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* Read a 64 bit unsigned integer value in little endian format from the memory buffer.
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*/
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#define GST_READ_UINT64_LE(data) (_GST_GET (data, 7, 64, 56) | \
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_GST_GET (data, 6, 64, 48) | \
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_GST_GET (data, 5, 64, 40) | \
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_GST_GET (data, 4, 64, 32) | \
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_GST_GET (data, 3, 64, 24) | \
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_GST_GET (data, 2, 64, 16) | \
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_GST_GET (data, 1, 64, 8) | \
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_GST_GET (data, 0, 64, 0))
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/**
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* GST_READ_UINT32_BE:
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* @data: memory location
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*
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* Read a 32 bit unsigned integer value in big endian format from the memory buffer.
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*/
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#define GST_READ_UINT32_BE(data) (_GST_GET (data, 0, 32, 24) | \
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_GST_GET (data, 1, 32, 16) | \
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_GST_GET (data, 2, 32, 8) | \
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_GST_GET (data, 3, 32, 0))
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/**
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* GST_READ_UINT32_LE:
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* @data: memory location
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*
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* Read a 32 bit unsigned integer value in little endian format from the memory buffer.
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*/
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#define GST_READ_UINT32_LE(data) (_GST_GET (data, 3, 32, 24) | \
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_GST_GET (data, 2, 32, 16) | \
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_GST_GET (data, 1, 32, 8) | \
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_GST_GET (data, 0, 32, 0))
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/**
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* GST_READ_UINT24_BE:
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* @data: memory location
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*
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* Read a 24 bit unsigned integer value in big endian format from the memory buffer.
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*
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* Since: 0.10.22
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*/
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#define GST_READ_UINT24_BE(data) (_GST_GET (data, 0, 32, 16) | \
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_GST_GET (data, 1, 32, 8) | \
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_GST_GET (data, 2, 32, 0))
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/**
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* GST_READ_UINT24_LE:
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* @data: memory location
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*
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* Read a 24 bit unsigned integer value in little endian format from the memory buffer.
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*
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* Since: 0.10.22
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*/
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#define GST_READ_UINT24_LE(data) (_GST_GET (data, 2, 32, 16) | \
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_GST_GET (data, 1, 32, 8) | \
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_GST_GET (data, 0, 32, 0))
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/**
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* GST_READ_UINT16_BE:
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* @data: memory location
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*
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* Read a 16 bit unsigned integer value in big endian format from the memory buffer.
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*/
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#define GST_READ_UINT16_BE(data) (_GST_GET (data, 0, 16, 8) | \
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_GST_GET (data, 1, 16, 0))
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/**
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* GST_READ_UINT16_LE:
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* @data: memory location
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*
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* Read a 16 bit unsigned integer value in little endian format from the memory buffer.
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*/
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#define GST_READ_UINT16_LE(data) (_GST_GET (data, 1, 16, 8) | \
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_GST_GET (data, 0, 16, 0))
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/**
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* GST_READ_UINT8:
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* @data: memory location
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*
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* Read an 8 bit unsigned integer value from the memory buffer.
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*/
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#define GST_READ_UINT8(data) (_GST_GET (data, 0, 8, 0))
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/**
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* GST_WRITE_UINT64_BE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 64 bit unsigned integer value in big endian format into the memory buffer.
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*/
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#define GST_WRITE_UINT64_BE(data, num) do { \
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_GST_PUT (data, 0, 64, 56, num); \
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_GST_PUT (data, 1, 64, 48, num); \
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_GST_PUT (data, 2, 64, 40, num); \
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_GST_PUT (data, 3, 64, 32, num); \
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_GST_PUT (data, 4, 64, 24, num); \
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_GST_PUT (data, 5, 64, 16, num); \
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_GST_PUT (data, 6, 64, 8, num); \
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_GST_PUT (data, 7, 64, 0, num); \
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} while (0)
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/**
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* GST_WRITE_UINT64_LE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 64 bit unsigned integer value in little endian format into the memory buffer.
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*/
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#define GST_WRITE_UINT64_LE(data, num) do { \
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_GST_PUT (data, 0, 64, 0, num); \
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_GST_PUT (data, 1, 64, 8, num); \
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_GST_PUT (data, 2, 64, 16, num); \
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_GST_PUT (data, 3, 64, 24, num); \
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_GST_PUT (data, 4, 64, 32, num); \
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_GST_PUT (data, 5, 64, 40, num); \
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_GST_PUT (data, 6, 64, 48, num); \
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_GST_PUT (data, 7, 64, 56, num); \
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} while (0)
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/**
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* GST_WRITE_UINT32_BE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 32 bit unsigned integer value in big endian format into the memory buffer.
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*/
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#define GST_WRITE_UINT32_BE(data, num) do { \
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_GST_PUT (data, 0, 32, 24, num); \
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_GST_PUT (data, 1, 32, 16, num); \
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_GST_PUT (data, 2, 32, 8, num); \
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_GST_PUT (data, 3, 32, 0, num); \
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} while (0)
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/**
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* GST_WRITE_UINT32_LE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 32 bit unsigned integer value in little endian format into the memory buffer.
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*/
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#define GST_WRITE_UINT32_LE(data, num) do { \
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_GST_PUT (data, 0, 32, 0, num); \
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_GST_PUT (data, 1, 32, 8, num); \
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_GST_PUT (data, 2, 32, 16, num); \
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_GST_PUT (data, 3, 32, 24, num); \
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} while (0)
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/**
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* GST_WRITE_UINT24_BE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 24 bit unsigned integer value in big endian format into the memory buffer.
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*
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* Since: 0.10.22
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*/
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#define GST_WRITE_UINT24_BE(data, num) do { \
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_GST_PUT (data, 0, 32, 16, num); \
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_GST_PUT (data, 1, 32, 8, num); \
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_GST_PUT (data, 2, 32, 0, num); \
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} while (0)
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/**
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* GST_WRITE_UINT24_LE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 24 bit unsigned integer value in little endian format into the memory buffer.
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*
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* Since: 0.10.22
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*/
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#define GST_WRITE_UINT24_LE(data, num) do { \
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_GST_PUT (data, 0, 32, 0, num); \
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_GST_PUT (data, 1, 32, 8, num); \
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_GST_PUT (data, 2, 32, 16, num); \
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} while (0)
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/**
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* GST_WRITE_UINT16_BE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 16 bit unsigned integer value in big endian format into the memory buffer.
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*/
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#define GST_WRITE_UINT16_BE(data, num) do { \
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_GST_PUT (data, 0, 16, 8, num); \
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_GST_PUT (data, 1, 16, 0, num); \
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} while (0)
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/**
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* GST_WRITE_UINT16_LE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 16 bit unsigned integer value in little endian format into the memory buffer.
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*/
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#define GST_WRITE_UINT16_LE(data, num) do { \
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_GST_PUT (data, 0, 16, 0, num); \
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_GST_PUT (data, 1, 16, 8, num); \
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} while (0)
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/**
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* GST_WRITE_UINT8:
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* @data: memory location
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* @num: value to store
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*
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* Store an 8 bit unsigned integer value into the memory buffer.
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*/
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#define GST_WRITE_UINT8(data, num) do { \
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_GST_PUT (data, 0, 8, 0, num); \
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} while (0)
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/**
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* GST_READ_FLOAT_LE:
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* @data: memory location
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*
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* Read a 32 bit float value in little endian format from the memory buffer.
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*
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* Returns: The floating point value read from @data
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*
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* Since: 0.10.22
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*
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*/
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#ifdef _FOOL_GTK_DOC_
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G_INLINE_FUNC gfloat GST_READ_FLOAT_LE (const guint8 *data);
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#endif
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inline static gfloat
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GST_READ_FLOAT_LE(const guint8 *data)
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{
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union
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{
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guint32 i;
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gfloat f;
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} u;
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u.i = GST_READ_UINT32_LE (data);
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return u.f;
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}
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/**
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* GST_READ_FLOAT_BE:
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* @data: memory location
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*
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* Read a 32 bit float value in big endian format from the memory buffer.
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*
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* Returns: The floating point value read from @data
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*
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* Since: 0.10.22
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*
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*/
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#ifdef _FOOL_GTK_DOC_
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G_INLINE_FUNC gfloat GST_READ_FLOAT_BE (const guint8 *data);
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#endif
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inline static gfloat
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GST_READ_FLOAT_BE(const guint8 *data)
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{
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union
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{
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guint32 i;
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gfloat f;
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} u;
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u.i = GST_READ_UINT32_BE (data);
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return u.f;
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}
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/**
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* GST_READ_DOUBLE_LE:
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* @data: memory location
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*
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* Read a 64 bit double value in little endian format from the memory buffer.
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*
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* Returns: The double-precision floating point value read from @data
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*
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* Since: 0.10.22
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*
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*/
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#ifdef _FOOL_GTK_DOC_
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G_INLINE_FUNC gdouble GST_READ_DOUBLE_LE (const guint8 *data);
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#endif
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inline static gdouble
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GST_READ_DOUBLE_LE(const guint8 *data)
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{
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union
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{
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guint64 i;
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gdouble d;
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} u;
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u.i = GST_READ_UINT64_LE (data);
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return u.d;
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}
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/**
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* GST_READ_DOUBLE_BE:
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* @data: memory location
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*
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* Read a 64 bit double value in big endian format from the memory buffer.
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*
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* Returns: The double-precision floating point value read from @data
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*
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* Since: 0.10.22
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*
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*/
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#ifdef _FOOL_GTK_DOC_
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G_INLINE_FUNC gdouble GST_READ_DOUBLE_BE (const guint8 *data);
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#endif
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inline static gdouble
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GST_READ_DOUBLE_BE(const guint8 *data)
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{
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union
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{
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guint64 i;
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gdouble d;
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} u;
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u.i = GST_READ_UINT64_BE (data);
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return u.d;
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}
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/**
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* GST_WRITE_FLOAT_LE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 32 bit float value in little endian format into the memory buffer.
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*
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* Since: 0.10.22
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*
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*/
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#ifdef _FOOL_GTK_DOC_
|
|
G_INLINE_FUNC void GST_WRITE_FLOAT_LE (guint8 *data, gfloat num);
|
|
#endif
|
|
|
|
inline static void
|
|
GST_WRITE_FLOAT_LE(guint8 *data, gfloat num)
|
|
{
|
|
union
|
|
{
|
|
guint32 i;
|
|
gfloat f;
|
|
} u;
|
|
|
|
u.f = num;
|
|
GST_WRITE_UINT32_LE (data, u.i);
|
|
}
|
|
|
|
/**
|
|
* GST_WRITE_FLOAT_BE:
|
|
* @data: memory location
|
|
* @num: value to store
|
|
*
|
|
* Store a 32 bit float value in big endian format into the memory buffer.
|
|
*
|
|
* Since: 0.10.22
|
|
*
|
|
*/
|
|
#ifdef _FOOL_GTK_DOC_
|
|
G_INLINE_FUNC void GST_WRITE_FLOAT_BE (guint8 *data, gfloat num);
|
|
#endif
|
|
|
|
inline static void
|
|
GST_WRITE_FLOAT_BE(guint8 *data, gfloat num)
|
|
{
|
|
union
|
|
{
|
|
guint32 i;
|
|
gfloat f;
|
|
} u;
|
|
|
|
u.f = num;
|
|
GST_WRITE_UINT32_BE (data, u.i);
|
|
}
|
|
|
|
/**
|
|
* GST_WRITE_DOUBLE_LE:
|
|
* @data: memory location
|
|
* @num: value to store
|
|
*
|
|
* Store a 64 bit double value in little endian format into the memory buffer.
|
|
*
|
|
* Since: 0.10.22
|
|
*
|
|
*/
|
|
#ifdef _FOOL_GTK_DOC_
|
|
G_INLINE_FUNC void GST_WRITE_DOUBLE_LE (guint8 *data, gdouble num);
|
|
#endif
|
|
|
|
inline static void
|
|
GST_WRITE_DOUBLE_LE(guint8 *data, gdouble num)
|
|
{
|
|
union
|
|
{
|
|
guint64 i;
|
|
gdouble d;
|
|
} u;
|
|
|
|
u.d = num;
|
|
GST_WRITE_UINT64_LE (data, u.i);
|
|
}
|
|
|
|
/**
|
|
* GST_WRITE_DOUBLE_BE:
|
|
* @data: memory location
|
|
* @num: value to store
|
|
*
|
|
* Store a 64 bit double value in big endian format into the memory buffer.
|
|
*
|
|
* Since: 0.10.22
|
|
*
|
|
*/
|
|
#ifdef _FOOL_GTK_DOC_
|
|
G_INLINE_FUNC void GST_WRITE_DOUBLE_BE (guint8 *data, gdouble num);
|
|
#endif
|
|
|
|
inline static void
|
|
GST_WRITE_DOUBLE_BE(guint8 *data, gdouble num)
|
|
{
|
|
union
|
|
{
|
|
guint64 i;
|
|
gdouble d;
|
|
} u;
|
|
|
|
u.d = num;
|
|
GST_WRITE_UINT64_BE (data, u.i);
|
|
}
|
|
|
|
/* Miscellaneous utility macros */
|
|
|
|
/**
|
|
* GST_ROUND_UP_2:
|
|
* @num: integer value to round up
|
|
*
|
|
* Rounds an integer value up to the next multiple of 2.
|
|
*/
|
|
#define GST_ROUND_UP_2(num) (((num)+1)&~1)
|
|
/**
|
|
* GST_ROUND_UP_4:
|
|
* @num: integer value to round up
|
|
*
|
|
* Rounds an integer value up to the next multiple of 4.
|
|
*/
|
|
#define GST_ROUND_UP_4(num) (((num)+3)&~3)
|
|
/**
|
|
* GST_ROUND_UP_8:
|
|
* @num: integer value to round up
|
|
*
|
|
* Rounds an integer value up to the next multiple of 8.
|
|
*/
|
|
#define GST_ROUND_UP_8(num) (((num)+7)&~7)
|
|
/**
|
|
* GST_ROUND_UP_16:
|
|
* @num: integer value to round up
|
|
*
|
|
* Rounds an integer value up to the next multiple of 16.
|
|
*/
|
|
#define GST_ROUND_UP_16(num) (((num)+15)&~15)
|
|
/**
|
|
* GST_ROUND_UP_32:
|
|
* @num: integer value to round up
|
|
*
|
|
* Rounds an integer value up to the next multiple of 32.
|
|
*/
|
|
#define GST_ROUND_UP_32(num) (((num)+31)&~31)
|
|
/**
|
|
* GST_ROUND_UP_64:
|
|
* @num: integer value to round up
|
|
*
|
|
* Rounds an integer value up to the next multiple of 64.
|
|
*/
|
|
#define GST_ROUND_UP_64(num) (((num)+63)&~63)
|
|
|
|
/**
|
|
* GST_ROUND_DOWN_2:
|
|
* @num: integer value to round down
|
|
*
|
|
* Rounds an integer value down to the next multiple of 2.
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
#define GST_ROUND_DOWN_2(num) ((num)&(~1))
|
|
/**
|
|
* GST_ROUND_DOWN_4:
|
|
* @num: integer value to round down
|
|
*
|
|
* Rounds an integer value down to the next multiple of 4.
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
#define GST_ROUND_DOWN_4(num) ((num)&(~3))
|
|
/**
|
|
* GST_ROUND_DOWN_8:
|
|
* @num: integer value to round down
|
|
*
|
|
* Rounds an integer value down to the next multiple of 8.
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
#define GST_ROUND_DOWN_8(num) ((num)&(~7))
|
|
/**
|
|
* GST_ROUND_DOWN_16:
|
|
* @num: integer value to round down
|
|
*
|
|
* Rounds an integer value down to the next multiple of 16.
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
#define GST_ROUND_DOWN_16(num) ((num)&(~15))
|
|
/**
|
|
* GST_ROUND_DOWN_32:
|
|
* @num: integer value to round down
|
|
*
|
|
* Rounds an integer value down to the next multiple of 32.
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
#define GST_ROUND_DOWN_32(num) ((num)&(~31))
|
|
/**
|
|
* GST_ROUND_DOWN_64:
|
|
* @num: integer value to round down
|
|
*
|
|
* Rounds an integer value down to the next multiple of 64.
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
#define GST_ROUND_DOWN_64(num) ((num)&(~63))
|
|
|
|
void gst_object_default_error (GstObject * source,
|
|
const GError * error,
|
|
const gchar * debug);
|
|
|
|
/* element functions */
|
|
void gst_element_create_all_pads (GstElement *element);
|
|
GstPad* gst_element_get_compatible_pad (GstElement *element, GstPad *pad,
|
|
const GstCaps *caps);
|
|
|
|
GstPadTemplate* gst_element_get_compatible_pad_template (GstElement *element, GstPadTemplate *compattempl);
|
|
|
|
G_CONST_RETURN gchar* gst_element_state_get_name (GstState state);
|
|
G_CONST_RETURN gchar * gst_element_state_change_return_get_name (GstStateChangeReturn state_ret);
|
|
|
|
gboolean gst_element_link (GstElement *src, GstElement *dest);
|
|
gboolean gst_element_link_many (GstElement *element_1,
|
|
GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
|
|
gboolean gst_element_link_filtered (GstElement * src,
|
|
GstElement * dest,
|
|
GstCaps *filter);
|
|
void gst_element_unlink (GstElement *src, GstElement *dest);
|
|
void gst_element_unlink_many (GstElement *element_1,
|
|
GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
|
|
|
|
gboolean gst_element_link_pads (GstElement *src, const gchar *srcpadname,
|
|
GstElement *dest, const gchar *destpadname);
|
|
gboolean gst_element_link_pads_full (GstElement *src, const gchar *srcpadname,
|
|
GstElement *dest, const gchar *destpadname,
|
|
GstPadLinkCheck flags);
|
|
void gst_element_unlink_pads (GstElement *src, const gchar *srcpadname,
|
|
GstElement *dest, const gchar *destpadname);
|
|
|
|
gboolean gst_element_link_pads_filtered (GstElement * src, const gchar * srcpadname,
|
|
GstElement * dest, const gchar * destpadname,
|
|
GstCaps *filter);
|
|
|
|
gboolean gst_element_seek_simple (GstElement *element,
|
|
GstFormat format,
|
|
GstSeekFlags seek_flags,
|
|
gint64 seek_pos);
|
|
|
|
/* util elementfactory functions */
|
|
gboolean gst_element_factory_can_sink_all_caps (GstElementFactory *factory, const GstCaps *caps);
|
|
gboolean gst_element_factory_can_src_all_caps (GstElementFactory *factory, const GstCaps *caps);
|
|
gboolean gst_element_factory_can_sink_any_caps (GstElementFactory *factory, const GstCaps *caps);
|
|
gboolean gst_element_factory_can_src_any_caps (GstElementFactory *factory, const GstCaps *caps);
|
|
|
|
/* util query functions */
|
|
gboolean gst_element_query_position (GstElement *element, GstFormat *format,
|
|
gint64 *cur);
|
|
gboolean gst_element_query_duration (GstElement *element, GstFormat *format,
|
|
gint64 *duration);
|
|
gboolean gst_element_query_convert (GstElement *element, GstFormat src_format, gint64 src_val,
|
|
GstFormat *dest_format, gint64 *dest_val);
|
|
|
|
/* element class functions */
|
|
void gst_element_class_install_std_props (GstElementClass * klass,
|
|
const gchar * first_name, ...) G_GNUC_NULL_TERMINATED;
|
|
|
|
/* pad functions */
|
|
void gst_pad_use_fixed_caps (GstPad *pad);
|
|
GstCaps* gst_pad_proxy_getcaps (GstPad * pad, GstCaps * filter);
|
|
gboolean gst_pad_proxy_setcaps (GstPad * pad, GstCaps * caps);
|
|
|
|
GstElement* gst_pad_get_parent_element (GstPad *pad);
|
|
|
|
/* util query functions */
|
|
gboolean gst_pad_query_position (GstPad *pad, GstFormat *format,
|
|
gint64 *cur);
|
|
gboolean gst_pad_query_duration (GstPad *pad, GstFormat *format,
|
|
gint64 *duration);
|
|
gboolean gst_pad_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
|
|
GstFormat *dest_format, gint64 *dest_val);
|
|
|
|
gboolean gst_pad_query_peer_position (GstPad *pad, GstFormat *format,
|
|
gint64 *cur);
|
|
gboolean gst_pad_query_peer_duration (GstPad *pad, GstFormat *format,
|
|
gint64 *duration);
|
|
gboolean gst_pad_query_peer_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
|
|
GstFormat *dest_format, gint64 *dest_val);
|
|
|
|
/* bin functions */
|
|
void gst_bin_add_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
|
|
void gst_bin_remove_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
|
|
GstPad * gst_bin_find_unlinked_pad (GstBin *bin, GstPadDirection direction);
|
|
|
|
/* buffer functions */
|
|
GstBuffer * gst_buffer_merge (GstBuffer * buf1, GstBuffer * buf2);
|
|
GstBuffer * gst_buffer_join (GstBuffer * buf1, GstBuffer * buf2);
|
|
|
|
/* tag emission utility functions */
|
|
void gst_element_found_tags_for_pad (GstElement * element,
|
|
GstPad * pad,
|
|
GstTagList * list);
|
|
void gst_element_found_tags (GstElement * element,
|
|
GstTagList * list);
|
|
|
|
/* parse utility functions */
|
|
GstElement * gst_parse_bin_from_description (const gchar * bin_description,
|
|
gboolean ghost_unlinked_pads,
|
|
GError ** err);
|
|
|
|
GstElement * gst_parse_bin_from_description_full (const gchar * bin_description,
|
|
gboolean ghost_unlinked_pads,
|
|
GstParseContext * context,
|
|
GstParseFlags flags,
|
|
GError ** err);
|
|
|
|
GstClockTime gst_util_get_timestamp (void);
|
|
|
|
/**
|
|
* GstSearchMode:
|
|
* @GST_SEARCH_MODE_EXACT : Only search for exact matches.
|
|
* @GST_SEARCH_MODE_BEFORE: Search for an exact match or the element just before.
|
|
* @GST_SEARCH_MODE_AFTER : Search for an exact match or the element just after.
|
|
*
|
|
* The different search modes.
|
|
*
|
|
* Since: 0.10.23
|
|
*/
|
|
typedef enum {
|
|
GST_SEARCH_MODE_EXACT = 0,
|
|
GST_SEARCH_MODE_BEFORE,
|
|
GST_SEARCH_MODE_AFTER
|
|
} GstSearchMode;
|
|
|
|
gpointer gst_util_array_binary_search (gpointer array, guint num_elements,
|
|
gsize element_size, GCompareDataFunc search_func,
|
|
GstSearchMode mode, gconstpointer search_data,
|
|
gpointer user_data);
|
|
|
|
gint gst_util_greatest_common_divisor (gint a, gint b);
|
|
void gst_util_fraction_to_double (gint src_n, gint src_d, gdouble *dest);
|
|
void gst_util_double_to_fraction (gdouble src, gint *dest_n, gint *dest_d);
|
|
gboolean gst_util_fraction_multiply (gint a_n, gint a_d, gint b_n, gint b_d, gint *res_n, gint *res_d);
|
|
gboolean gst_util_fraction_add (gint a_n, gint a_d, gint b_n, gint b_d, gint *res_n, gint *res_d);
|
|
gint gst_util_fraction_compare (gint a_n, gint a_d, gint b_n, gint b_d);
|
|
|
|
|
|
/* sink message event
|
|
*
|
|
* FIXME: This should be in gstevent.h but can't because
|
|
* it needs GstMessage and this would introduce circular
|
|
* header includes. And forward declarations of typedefs
|
|
* are unfortunately not possible. The implementation of
|
|
* these functions is in gstevent.c.
|
|
*/
|
|
GstEvent* gst_event_new_sink_message (GstMessage *msg);
|
|
void gst_event_parse_sink_message (GstEvent *event, GstMessage **msg);
|
|
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_UTILS_H__ */
|