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gstreamer/gst/gstutils.h
Tim-Philipp Müller 7b0e3356eb utils: const-ify arguments to gst_object_default_error()
2010-12-07 19:35:24 +00:00

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2002 Thomas Vander Stichele <thomas@apestaart.org>
*
* gstutils.h: Header for various utility functions
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_UTILS_H__
#define __GST_UTILS_H__
#include <glib.h>
#include <gst/gstbin.h>
#include <gst/gstparse.h>
G_BEGIN_DECLS
void gst_util_set_value_from_string (GValue *value, const gchar *value_str);
void gst_util_set_object_arg (GObject *object, const gchar *name, const gchar *value);
void gst_util_dump_mem (const guchar *mem, guint size);
guint64 gst_util_gdouble_to_guint64 (gdouble value) G_GNUC_CONST;
gdouble gst_util_guint64_to_gdouble (guint64 value) G_GNUC_CONST;
/**
* gst_guint64_to_gdouble:
* @value: the #guint64 value to convert
*
* Convert @value to a gdouble.
*
* Returns: @value converted to a #gdouble.
*/
/**
* gst_gdouble_to_guint64:
* @value: the #gdouble value to convert
*
* Convert @value to a guint64.
*
* Returns: @value converted to a #guint64.
*/
#ifdef WIN32
#define gst_gdouble_to_guint64(value) gst_util_gdouble_to_guint64(value)
#define gst_guint64_to_gdouble(value) gst_util_guint64_to_gdouble(value)
#else
#define gst_gdouble_to_guint64(value) ((guint64) (value))
#define gst_guint64_to_gdouble(value) ((gdouble) (value))
#endif
guint64 gst_util_uint64_scale (guint64 val, guint64 num, guint64 denom);
guint64 gst_util_uint64_scale_round (guint64 val, guint64 num, guint64 denom);
guint64 gst_util_uint64_scale_ceil (guint64 val, guint64 num, guint64 denom);
guint64 gst_util_uint64_scale_int (guint64 val, gint num, gint denom);
guint64 gst_util_uint64_scale_int_round (guint64 val, gint num, gint denom);
guint64 gst_util_uint64_scale_int_ceil (guint64 val, gint num, gint denom);
guint32 gst_util_seqnum_next (void);
gint32 gst_util_seqnum_compare (guint32 s1, guint32 s2);
void gst_print_pad_caps (GString *buf, gint indent, GstPad *pad);
void gst_print_element_args (GString *buf, gint indent, GstElement *element);
GType gst_type_register_static_full (GType parent_type,
const gchar *type_name,
guint class_size,
GBaseInitFunc base_init,
GBaseFinalizeFunc base_finalize,
GClassInitFunc class_init,
GClassFinalizeFunc class_finalize,
gconstpointer class_data,
guint instance_size,
guint16 n_preallocs,
GInstanceInitFunc instance_init,
const GTypeValueTable *value_table,
GTypeFlags flags);
/* Macros for defining classes. Ideas taken from Bonobo, which took theirs
from Nautilus and GOB. */
/**
* GST_BOILERPLATE_FULL:
* @type: the name of the type struct
* @type_as_function: the prefix for the functions
* @parent_type: the parent type struct name
* @parent_type_macro: the parent type macro
* @additional_initializations: function pointer in the form of
* void additional_initializations (GType type) that can be used for
* initializing interfaces and the like
*
* Define the boilerplate type stuff to reduce typos and code size. Defines
* the get_type method and the parent_class static variable.
*
* <informalexample>
* <programlisting>
* GST_BOILERPLATE_FULL (GstFdSink, gst_fdsink, GstElement, GST_TYPE_ELEMENT, _do_init);
* </programlisting>
* </informalexample>
*/
#define GST_BOILERPLATE_FULL(type, type_as_function, parent_type, parent_type_macro, additional_initializations) \
\
static void type_as_function ## _base_init (gpointer g_class); \
static void type_as_function ## _class_init (type ## Class *g_class);\
static void type_as_function ## _init (type *object, \
type ## Class *g_class);\
static parent_type ## Class *parent_class = NULL; \
static void \
type_as_function ## _class_init_trampoline (gpointer g_class) \
{ \
parent_class = (parent_type ## Class *) \
g_type_class_peek_parent (g_class); \
type_as_function ## _class_init ((type ## Class *)g_class); \
} \
\
GType \
type_as_function ## _get_type (void) \
{ \
/* The typedef for GType may be gulong or gsize, depending on the \
* system and whether the compiler is c++ or not. The g_once_init_* \
* functions always take a gsize * though ... */ \
static volatile gsize gonce_data = 0; \
if (g_once_init_enter (&gonce_data)) { \
GType _type; \
_type = gst_type_register_static_full (parent_type_macro, \
g_intern_static_string (#type), \
sizeof (type ## Class), \
type_as_function ## _base_init, \
NULL, /* base_finalize */ \
(GClassInitFunc) type_as_function ## _class_init_trampoline, \
NULL, /* class_finalize */ \
NULL, /* class_data */ \
sizeof (type), \
0, /* n_preallocs */ \
(GInstanceInitFunc) type_as_function ## _init, \
NULL, \
(GTypeFlags) 0); \
additional_initializations (_type); \
g_once_init_leave (&gonce_data, (gsize) _type); \
} \
return (GType) gonce_data; \
}
#define __GST_DO_NOTHING(type) /* NOP */
/**
* GST_BOILERPLATE:
* @type: the name of the type struct
* @type_as_function: the prefix for the functions
* @parent_type: the parent type struct name
* @parent_type_macro: the parent type macro
*
* Define the boilerplate type stuff to reduce typos and code size. Defines
* the get_type method and the parent_class static variable.
*
* <informalexample>
* <programlisting>
* GST_BOILERPLATE (GstFdSink, gst_fdsink, GstElement, GST_TYPE_ELEMENT);
* </programlisting>
* </informalexample>
*/
#define GST_BOILERPLATE(type,type_as_function,parent_type,parent_type_macro) \
GST_BOILERPLATE_FULL (type, type_as_function, parent_type, parent_type_macro, \
__GST_DO_NOTHING)
/* Like GST_BOILERPLATE, but makes the type 1) implement an interface, and 2)
* implement GstImplementsInterface for that type
*
* After this you will need to implement interface_as_function ## _supported
* and interface_as_function ## _interface_init
*/
/**
* GST_BOILERPLATE_WITH_INTERFACE:
* @type: the name of the type struct
* @type_as_function: the prefix for the functions
* @parent_type: the parent type struct name
* @parent_type_as_macro: the parent type macro
* @interface_type: the name of the interface type struct
* @interface_type_as_macro: the interface type macro
* @interface_as_function: the interface function name prefix
*
* Like GST_BOILERPLATE, but makes the type 1) implement an interface, and 2)
* implement GstImplementsInterface for that type.
*
* After this you will need to implement interface_as_function ## _supported
* and interface_as_function ## _interface_init
*/
#define GST_BOILERPLATE_WITH_INTERFACE(type, type_as_function, \
parent_type, parent_type_as_macro, interface_type, \
interface_type_as_macro, interface_as_function) \
\
static void interface_as_function ## _interface_init (interface_type ## Class *klass); \
static gboolean interface_as_function ## _supported (type *object, GType iface_type); \
\
static void \
type_as_function ## _implements_interface_init (GstImplementsInterfaceClass *klass) \
{ \
klass->supported = (gboolean (*)(GstImplementsInterface*, GType))interface_as_function ## _supported; \
} \
\
static void \
type_as_function ## _init_interfaces (GType type) \
{ \
static const GInterfaceInfo implements_iface_info = { \
(GInterfaceInitFunc) type_as_function ## _implements_interface_init,\
NULL, \
NULL, \
}; \
static const GInterfaceInfo iface_info = { \
(GInterfaceInitFunc) interface_as_function ## _interface_init, \
NULL, \
NULL, \
}; \
\
g_type_add_interface_static (type, GST_TYPE_IMPLEMENTS_INTERFACE, \
&implements_iface_info); \
g_type_add_interface_static (type, interface_type_as_macro, \
&iface_info); \
} \
\
GST_BOILERPLATE_FULL (type, type_as_function, parent_type, \
parent_type_as_macro, type_as_function ## _init_interfaces)
/**
* GST_CALL_PARENT:
* @parent_class_cast: the name of the class cast macro for the parent type
* @name: name of the function to call
* @args: arguments enclosed in '( )'
*
* Just call the parent handler. This assumes that there is a variable
* named parent_class that points to the (duh!) parent class. Note that
* this macro is not to be used with things that return something, use
* the _WITH_DEFAULT version for that
*/
#define GST_CALL_PARENT(parent_class_cast, name, args) \
((parent_class_cast(parent_class)->name != NULL) ? \
parent_class_cast(parent_class)->name args : (void) 0)
/**
* GST_CALL_PARENT_WITH_DEFAULT:
* @parent_class_cast: the name of the class cast macro for the parent type
* @name: name of the function to call
* @args: arguments enclosed in '( )'
* @def_return: default result
*
* Same as GST_CALL_PARENT(), but in case there is no implementation, it
* evaluates to @def_return.
*/
#define GST_CALL_PARENT_WITH_DEFAULT(parent_class_cast, name, args, def_return)\
((parent_class_cast(parent_class)->name != NULL) ? \
parent_class_cast(parent_class)->name args : def_return)
/* Define PUT and GET functions for unaligned memory */
#define _GST_GET(__data, __idx, __size, __shift) \
(((guint##__size) (((const guint8 *) (__data))[__idx])) << (__shift))
#define _GST_PUT(__data, __idx, __size, __shift, __num) \
(((guint8 *) (__data))[__idx] = (((guint##__size) (__num)) >> (__shift)) & 0xff)
/**
* GST_READ_UINT64_BE:
* @data: memory location
*
* Read a 64 bit unsigned integer value in big endian format from the memory buffer.
*/
#define GST_READ_UINT64_BE(data) (_GST_GET (data, 0, 64, 56) | \
_GST_GET (data, 1, 64, 48) | \
_GST_GET (data, 2, 64, 40) | \
_GST_GET (data, 3, 64, 32) | \
_GST_GET (data, 4, 64, 24) | \
_GST_GET (data, 5, 64, 16) | \
_GST_GET (data, 6, 64, 8) | \
_GST_GET (data, 7, 64, 0))
/**
* GST_READ_UINT64_LE:
* @data: memory location
*
* Read a 64 bit unsigned integer value in little endian format from the memory buffer.
*/
#define GST_READ_UINT64_LE(data) (_GST_GET (data, 7, 64, 56) | \
_GST_GET (data, 6, 64, 48) | \
_GST_GET (data, 5, 64, 40) | \
_GST_GET (data, 4, 64, 32) | \
_GST_GET (data, 3, 64, 24) | \
_GST_GET (data, 2, 64, 16) | \
_GST_GET (data, 1, 64, 8) | \
_GST_GET (data, 0, 64, 0))
/**
* GST_READ_UINT32_BE:
* @data: memory location
*
* Read a 32 bit unsigned integer value in big endian format from the memory buffer.
*/
#define GST_READ_UINT32_BE(data) (_GST_GET (data, 0, 32, 24) | \
_GST_GET (data, 1, 32, 16) | \
_GST_GET (data, 2, 32, 8) | \
_GST_GET (data, 3, 32, 0))
/**
* GST_READ_UINT32_LE:
* @data: memory location
*
* Read a 32 bit unsigned integer value in little endian format from the memory buffer.
*/
#define GST_READ_UINT32_LE(data) (_GST_GET (data, 3, 32, 24) | \
_GST_GET (data, 2, 32, 16) | \
_GST_GET (data, 1, 32, 8) | \
_GST_GET (data, 0, 32, 0))
/**
* GST_READ_UINT24_BE:
* @data: memory location
*
* Read a 24 bit unsigned integer value in big endian format from the memory buffer.
*
* Since: 0.10.22
*/
#define GST_READ_UINT24_BE(data) (_GST_GET (data, 0, 32, 16) | \
_GST_GET (data, 1, 32, 8) | \
_GST_GET (data, 2, 32, 0))
/**
* GST_READ_UINT24_LE:
* @data: memory location
*
* Read a 24 bit unsigned integer value in little endian format from the memory buffer.
*
* Since: 0.10.22
*/
#define GST_READ_UINT24_LE(data) (_GST_GET (data, 2, 32, 16) | \
_GST_GET (data, 1, 32, 8) | \
_GST_GET (data, 0, 32, 0))
/**
* GST_READ_UINT16_BE:
* @data: memory location
*
* Read a 16 bit unsigned integer value in big endian format from the memory buffer.
*/
#define GST_READ_UINT16_BE(data) (_GST_GET (data, 0, 16, 8) | \
_GST_GET (data, 1, 16, 0))
/**
* GST_READ_UINT16_LE:
* @data: memory location
*
* Read a 16 bit unsigned integer value in little endian format from the memory buffer.
*/
#define GST_READ_UINT16_LE(data) (_GST_GET (data, 1, 16, 8) | \
_GST_GET (data, 0, 16, 0))
/**
* GST_READ_UINT8:
* @data: memory location
*
* Read an 8 bit unsigned integer value from the memory buffer.
*/
#define GST_READ_UINT8(data) (_GST_GET (data, 0, 8, 0))
/**
* GST_WRITE_UINT64_BE:
* @data: memory location
* @num: value to store
*
* Store a 64 bit unsigned integer value in big endian format into the memory buffer.
*/
#define GST_WRITE_UINT64_BE(data, num) do { \
_GST_PUT (data, 0, 64, 56, num); \
_GST_PUT (data, 1, 64, 48, num); \
_GST_PUT (data, 2, 64, 40, num); \
_GST_PUT (data, 3, 64, 32, num); \
_GST_PUT (data, 4, 64, 24, num); \
_GST_PUT (data, 5, 64, 16, num); \
_GST_PUT (data, 6, 64, 8, num); \
_GST_PUT (data, 7, 64, 0, num); \
} while (0)
/**
* GST_WRITE_UINT64_LE:
* @data: memory location
* @num: value to store
*
* Store a 64 bit unsigned integer value in little endian format into the memory buffer.
*/
#define GST_WRITE_UINT64_LE(data, num) do { \
_GST_PUT (data, 0, 64, 0, num); \
_GST_PUT (data, 1, 64, 8, num); \
_GST_PUT (data, 2, 64, 16, num); \
_GST_PUT (data, 3, 64, 24, num); \
_GST_PUT (data, 4, 64, 32, num); \
_GST_PUT (data, 5, 64, 40, num); \
_GST_PUT (data, 6, 64, 48, num); \
_GST_PUT (data, 7, 64, 56, num); \
} while (0)
/**
* GST_WRITE_UINT32_BE:
* @data: memory location
* @num: value to store
*
* Store a 32 bit unsigned integer value in big endian format into the memory buffer.
*/
#define GST_WRITE_UINT32_BE(data, num) do { \
_GST_PUT (data, 0, 32, 24, num); \
_GST_PUT (data, 1, 32, 16, num); \
_GST_PUT (data, 2, 32, 8, num); \
_GST_PUT (data, 3, 32, 0, num); \
} while (0)
/**
* GST_WRITE_UINT32_LE:
* @data: memory location
* @num: value to store
*
* Store a 32 bit unsigned integer value in little endian format into the memory buffer.
*/
#define GST_WRITE_UINT32_LE(data, num) do { \
_GST_PUT (data, 0, 32, 0, num); \
_GST_PUT (data, 1, 32, 8, num); \
_GST_PUT (data, 2, 32, 16, num); \
_GST_PUT (data, 3, 32, 24, num); \
} while (0)
/**
* GST_WRITE_UINT24_BE:
* @data: memory location
* @num: value to store
*
* Store a 24 bit unsigned integer value in big endian format into the memory buffer.
*
* Since: 0.10.22
*/
#define GST_WRITE_UINT24_BE(data, num) do { \
_GST_PUT (data, 0, 32, 16, num); \
_GST_PUT (data, 1, 32, 8, num); \
_GST_PUT (data, 2, 32, 0, num); \
} while (0)
/**
* GST_WRITE_UINT24_LE:
* @data: memory location
* @num: value to store
*
* Store a 24 bit unsigned integer value in little endian format into the memory buffer.
*
* Since: 0.10.22
*/
#define GST_WRITE_UINT24_LE(data, num) do { \
_GST_PUT (data, 0, 32, 0, num); \
_GST_PUT (data, 1, 32, 8, num); \
_GST_PUT (data, 2, 32, 16, num); \
} while (0)
/**
* GST_WRITE_UINT16_BE:
* @data: memory location
* @num: value to store
*
* Store a 16 bit unsigned integer value in big endian format into the memory buffer.
*/
#define GST_WRITE_UINT16_BE(data, num) do { \
_GST_PUT (data, 0, 16, 8, num); \
_GST_PUT (data, 1, 16, 0, num); \
} while (0)
/**
* GST_WRITE_UINT16_LE:
* @data: memory location
* @num: value to store
*
* Store a 16 bit unsigned integer value in little endian format into the memory buffer.
*/
#define GST_WRITE_UINT16_LE(data, num) do { \
_GST_PUT (data, 0, 16, 0, num); \
_GST_PUT (data, 1, 16, 8, num); \
} while (0)
/**
* GST_WRITE_UINT8:
* @data: memory location
* @num: value to store
*
* Store an 8 bit unsigned integer value into the memory buffer.
*/
#define GST_WRITE_UINT8(data, num) do { \
_GST_PUT (data, 0, 8, 0, num); \
} while (0)
/* Float endianess conversion macros */
/* FIXME: Remove this once we depend on a GLib version with this */
#ifndef GFLOAT_FROM_LE
/**
* GFLOAT_SWAP_LE_BE:
* @in: input value
*
* Swap byte order of a 32-bit floating point value (float).
*
* Returns: @in byte-swapped.
*
* Since: 0.10.22
*
*/
#ifdef _FOOL_GTK_DOC_
G_INLINE_FUNC gfloat GFLOAT_SWAP_LE_BE (gfloat in);
#endif
inline static gfloat
GFLOAT_SWAP_LE_BE(gfloat in)
{
union
{
guint32 i;
gfloat f;
} u;
u.f = in;
u.i = GUINT32_SWAP_LE_BE (u.i);
return u.f;
}
/**
* GDOUBLE_SWAP_LE_BE:
* @in: input value
*
* Swap byte order of a 64-bit floating point value (double).
*
* Returns: @in byte-swapped.
*
* Since: 0.10.22
*
*/
#ifdef _FOOL_GTK_DOC_
G_INLINE_FUNC gdouble GDOUBLE_SWAP_LE_BE (gdouble in);
#endif
inline static gdouble
GDOUBLE_SWAP_LE_BE(gdouble in)
{
union
{
guint64 i;
gdouble d;
} u;
u.d = in;
u.i = GUINT64_SWAP_LE_BE (u.i);
return u.d;
}
/**
* GDOUBLE_TO_LE:
* @val: value
*
* Convert 64-bit floating point value (double) from native byte order into
* little endian byte order.
*
* Since: 0.10.22
*
*/
/**
* GDOUBLE_TO_BE:
* @val: value
*
* Convert 64-bit floating point value (double) from native byte order into
* big endian byte order.
*
* Since: 0.10.22
*
*/
/**
* GDOUBLE_FROM_LE:
* @val: value
*
* Convert 64-bit floating point value (double) from little endian byte order
* into native byte order.
*
* Since: 0.10.22
*
*/
/**
* GDOUBLE_FROM_BE:
* @val: value
*
* Convert 64-bit floating point value (double) from big endian byte order
* into native byte order.
*
* Since: 0.10.22
*
*/
/**
* GFLOAT_TO_LE:
* @val: value
*
* Convert 32-bit floating point value (float) from native byte order into
* little endian byte order.
*
* Since: 0.10.22
*
*/
/**
* GFLOAT_TO_BE:
* @val: value
*
* Convert 32-bit floating point value (float) from native byte order into
* big endian byte order.
*
* Since: 0.10.22
*
*/
/**
* GFLOAT_FROM_LE:
* @val: value
*
* Convert 32-bit floating point value (float) from little endian byte order
* into native byte order.
*
* Since: 0.10.22
*
*/
/**
* GFLOAT_FROM_BE:
* @val: value
*
* Convert 32-bit floating point value (float) from big endian byte order
* into native byte order.
*
* Since: 0.10.22
*
*/
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define GFLOAT_TO_LE(val) ((gfloat) (val))
#define GFLOAT_TO_BE(val) (GFLOAT_SWAP_LE_BE (val))
#define GDOUBLE_TO_LE(val) ((gdouble) (val))
#define GDOUBLE_TO_BE(val) (GDOUBLE_SWAP_LE_BE (val))
#elif G_BYTE_ORDER == G_BIG_ENDIAN
#define GFLOAT_TO_LE(val) (GFLOAT_SWAP_LE_BE (val))
#define GFLOAT_TO_BE(val) ((gfloat) (val))
#define GDOUBLE_TO_LE(val) (GDOUBLE_SWAP_LE_BE (val))
#define GDOUBLE_TO_BE(val) ((gdouble) (val))
#else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
#error unknown ENDIAN type
#endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
#define GFLOAT_FROM_LE(val) (GFLOAT_TO_LE (val))
#define GFLOAT_FROM_BE(val) (GFLOAT_TO_BE (val))
#define GDOUBLE_FROM_LE(val) (GDOUBLE_TO_LE (val))
#define GDOUBLE_FROM_BE(val) (GDOUBLE_TO_BE (val))
#endif /* !defined(GFLOAT_FROM_LE) */
/**
* GST_READ_FLOAT_LE:
* @data: memory location
*
* Read a 32 bit float value in little endian format from the memory buffer.
*
* Returns: The floating point value read from @data
*
* Since: 0.10.22
*
*/
#ifdef _FOOL_GTK_DOC_
G_INLINE_FUNC gfloat GST_READ_FLOAT_LE (const guint8 *data);
#endif
inline static gfloat
GST_READ_FLOAT_LE(const guint8 *data)
{
union
{
guint32 i;
gfloat f;
} u;
u.i = GST_READ_UINT32_LE (data);
return u.f;
}
/**
* GST_READ_FLOAT_BE:
* @data: memory location
*
* Read a 32 bit float value in big endian format from the memory buffer.
*
* Returns: The floating point value read from @data
*
* Since: 0.10.22
*
*/
#ifdef _FOOL_GTK_DOC_
G_INLINE_FUNC gfloat GST_READ_FLOAT_BE (const guint8 *data);
#endif
inline static gfloat
GST_READ_FLOAT_BE(const guint8 *data)
{
union
{
guint32 i;
gfloat f;
} u;
u.i = GST_READ_UINT32_BE (data);
return u.f;
}
/**
* GST_READ_DOUBLE_LE:
* @data: memory location
*
* Read a 64 bit double value in little endian format from the memory buffer.
*
* Returns: The double-precision floating point value read from @data
*
* Since: 0.10.22
*
*/
#ifdef _FOOL_GTK_DOC_
G_INLINE_FUNC gdouble GST_READ_DOUBLE_LE (const guint8 *data);
#endif
inline static gdouble
GST_READ_DOUBLE_LE(const guint8 *data)
{
union
{
guint64 i;
gdouble d;
} u;
u.i = GST_READ_UINT64_LE (data);
return u.d;
}
/**
* GST_READ_DOUBLE_BE:
* @data: memory location
*
* Read a 64 bit double value in big endian format from the memory buffer.
*
* Returns: The double-precision floating point value read from @data
*
* Since: 0.10.22
*
*/
#ifdef _FOOL_GTK_DOC_
G_INLINE_FUNC gdouble GST_READ_DOUBLE_BE (const guint8 *data);
#endif
inline static gdouble
GST_READ_DOUBLE_BE(const guint8 *data)
{
union
{
guint64 i;
gdouble d;
} u;
u.i = GST_READ_UINT64_BE (data);
return u.d;
}
/**
* GST_WRITE_FLOAT_LE:
* @data: memory location
* @num: value to store
*
* Store a 32 bit float value in little endian format into the memory buffer.
*
* Since: 0.10.22
*
*/
#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_src_caps(GstElementFactory *factory, const GstCaps *caps);
gboolean gst_element_factory_can_sink_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_get_fixed_caps_func (GstPad *pad);
GstCaps* gst_pad_proxy_getcaps (GstPad * pad);
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);
#ifndef GST_DISABLE_DEPRECATED
GstPad * gst_bin_find_unconnected_pad (GstBin *bin, GstPadDirection direction);
#endif
/* buffer functions */
GstBuffer * gst_buffer_merge (GstBuffer * buf1, GstBuffer * buf2);
GstBuffer * gst_buffer_join (GstBuffer * buf1, GstBuffer * buf2);
#ifndef GST_DISABLE_DEPRECATED
void gst_buffer_stamp (GstBuffer * dest, const GstBuffer * src);
#endif /* GST_DISABLE_DEPRECATED */
/* atomic functions */
#ifndef GST_DISABLE_DEPRECATED
void gst_atomic_int_set (gint * atomic_int, gint value);
#endif
/* probes */
gulong gst_pad_add_data_probe (GstPad * pad,
GCallback handler,
gpointer data);
gulong gst_pad_add_data_probe_full (GstPad * pad,
GCallback handler,
gpointer data,
GDestroyNotify notify);
void gst_pad_remove_data_probe (GstPad * pad, guint handler_id);
gulong gst_pad_add_event_probe (GstPad * pad,
GCallback handler,
gpointer data);
gulong gst_pad_add_event_probe_full (GstPad * pad,
GCallback handler,
gpointer data,
GDestroyNotify notify);
void gst_pad_remove_event_probe (GstPad * pad, guint handler_id);
gulong gst_pad_add_buffer_probe (GstPad * pad,
GCallback handler,
gpointer data);
gulong gst_pad_add_buffer_probe_full (GstPad * pad,
GCallback handler,
gpointer data,
GDestroyNotify notify);
void gst_pad_remove_buffer_probe (GstPad * pad, guint handler_id);
/* 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__ */
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