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gstreamer/gst/gstutils.h
Sebastian Dröge 3de23c30e1 utils: Add helper function for marking types as plugin API 
This can be used to mark additional types exposed by plugins (i.e.
enums, flags and GObjects) via properties, signals or pad templates as
plugin API. They can then be picked up by the documentation for the
plugin.

Not all types exposed by plugins are documented automatically because
they might come from an external library and should be documented from
there instead.
2020-06-04 15:49:23 -04:00

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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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_UTILS_H__
#define __GST_UTILS_H__
#include <glib.h>
#include <gst/gstconfig.h>
#include <gst/gstbin.h>
#include <gst/gstparse.h>
G_BEGIN_DECLS
GST_API
void gst_util_set_value_from_string (GValue *value, const gchar *value_str);
GST_API
void gst_util_set_object_arg (GObject *object, const gchar *name, const gchar *value);
GST_API
gboolean gst_util_set_object_array (GObject * object, const gchar * name,
const GValueArray * array);
GST_API
gboolean gst_util_get_object_array (GObject * object, const gchar * name,
GValueArray ** array);
GST_API
void gst_util_dump_mem (const guchar *mem, guint size);
GST_API
void gst_util_dump_buffer (GstBuffer * buf);
GST_API
guint64 gst_util_gdouble_to_guint64 (gdouble value) G_GNUC_CONST;
GST_API
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
GST_API
guint64 gst_util_uint64_scale (guint64 val, guint64 num, guint64 denom);
GST_API
guint64 gst_util_uint64_scale_round (guint64 val, guint64 num, guint64 denom);
GST_API
guint64 gst_util_uint64_scale_ceil (guint64 val, guint64 num, guint64 denom);
GST_API
guint64 gst_util_uint64_scale_int (guint64 val, gint num, gint denom);
GST_API
guint64 gst_util_uint64_scale_int_round (guint64 val, gint num, gint denom);
GST_API
guint64 gst_util_uint64_scale_int_ceil (guint64 val, gint num, gint denom);
/**
* GST_SEQNUM_INVALID:
*
* A value which is guaranteed to never be returned by
* gst_util_seqnum_next().
*
* Can be used as a default value in variables used to store seqnum.
*
* Since: 1.14
*/
#define GST_SEQNUM_INVALID (0)
GST_API
guint32 gst_util_seqnum_next (void);
GST_API
gint32 gst_util_seqnum_compare (guint32 s1, guint32 s2);
/**
* GST_GROUP_ID_INVALID:
*
* A value which is guaranteed to never be returned by
* gst_util_group_id_next().
*
* Can be used as a default value in variables used to store group_id.
*
* Since: 1.14
*/
#define GST_GROUP_ID_INVALID (0)
GST_API
guint gst_util_group_id_next (void);
/**
* 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)
#ifndef __GTK_DOC_IGNORE__
#if GST_HAVE_UNALIGNED_ACCESS
static inline guint16 __gst_fast_read16(const guint8 *v) {
return *(const guint16*)(const void*)(v);
}
static inline guint32 __gst_fast_read32(const guint8 *v) {
return *(const guint32*)(const void*)(v);
}
static inline guint64 __gst_fast_read64(const guint8 *v) {
return *(const guint64*)(const void*)(v);
}
static inline guint16 __gst_fast_read_swap16(const guint8 *v) {
return GUINT16_SWAP_LE_BE(*(const guint16*)(const void*)(v));
}
static inline guint32 __gst_fast_read_swap32(const guint8 *v) {
return GUINT32_SWAP_LE_BE(*(const guint32*)(const void*)(v));
}
static inline guint64 __gst_fast_read_swap64(const guint8 *v) {
return GUINT64_SWAP_LE_BE(*(const guint64*)(const void*)(v));
}
# define _GST_FAST_READ(s, d) __gst_fast_read##s((const guint8 *)(d))
# define _GST_FAST_READ_SWAP(s, d) __gst_fast_read_swap##s((const guint8 *)(d))
static inline void __gst_fast_write16 (guint8 *p, guint16 v) {
*(guint16*)(void*)(p) = v;
}
static inline void __gst_fast_write32 (guint8 *p, guint32 v) {
*(guint32*)(void*)(p) = v;
}
static inline void __gst_fast_write64 (guint8 *p, guint64 v) {
*(guint64*)(void*)(p) = v;
}
static inline void __gst_fast_write_swap16 (guint8 *p, guint16 v) {
*(guint16*)(void*)(p) = GUINT16_SWAP_LE_BE (v);
}
static inline void __gst_fast_write_swap32 (guint8 *p, guint32 v) {
*(guint32*)(void*)(p) = GUINT32_SWAP_LE_BE (v);
}
static inline void __gst_fast_write_swap64 (guint8 *p, guint64 v) {
*(guint64*)(void*)(p) = GUINT64_SWAP_LE_BE (v);
}
# define _GST_FAST_WRITE(s, d, v) __gst_fast_write##s((guint8 *)(d), (v))
# define _GST_FAST_WRITE_SWAP(s, d, v) __gst_fast_write_swap##s((guint8 *)(d), (v))
#endif
#endif
/**
* GST_READ_UINT64_BE:
* @data: memory location
*
* Read a 64 bit unsigned integer value in big endian format from the memory buffer.
*/
/**
* GST_READ_UINT64_LE:
* @data: memory location
*
* Read a 64 bit unsigned integer value in little endian format from the memory buffer.
*/
#if GST_HAVE_UNALIGNED_ACCESS
# if (G_BYTE_ORDER == G_BIG_ENDIAN)
# define GST_READ_UINT64_BE(data) _GST_FAST_READ (64, data)
# define GST_READ_UINT64_LE(data) _GST_FAST_READ_SWAP (64, data)
# else
# define GST_READ_UINT64_BE(data) _GST_FAST_READ_SWAP (64, data)
# define GST_READ_UINT64_LE(data) _GST_FAST_READ (64, data)
# endif
#else
#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))
#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))
#define GST_READ_UINT64_BE(data) __gst_slow_read64_be((const guint8 *)(data))
static inline guint64 __gst_slow_read64_be (const guint8 * data) {
return _GST_READ_UINT64_BE (data);
}
#define GST_READ_UINT64_LE(data) __gst_slow_read64_le((const guint8 *)(data))
static inline guint64 __gst_slow_read64_le (const guint8 * data) {
return _GST_READ_UINT64_LE (data);
}
#endif
/**
* GST_READ_UINT32_BE:
* @data: memory location
*
* Read a 32 bit unsigned integer value in big endian format from the memory buffer.
*/
/**
* GST_READ_UINT32_LE:
* @data: memory location
*
* Read a 32 bit unsigned integer value in little endian format from the memory buffer.
*/
#if GST_HAVE_UNALIGNED_ACCESS
# if (G_BYTE_ORDER == G_BIG_ENDIAN)
# define GST_READ_UINT32_BE(data) _GST_FAST_READ (32, data)
# define GST_READ_UINT32_LE(data) _GST_FAST_READ_SWAP (32, data)
# else
# define GST_READ_UINT32_BE(data) _GST_FAST_READ_SWAP (32, data)
# define GST_READ_UINT32_LE(data) _GST_FAST_READ (32, data)
# endif
#else
#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))
#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))
#define GST_READ_UINT32_BE(data) __gst_slow_read32_be((const guint8 *)(data))
static inline guint32 __gst_slow_read32_be (const guint8 * data) {
return _GST_READ_UINT32_BE (data);
}
#define GST_READ_UINT32_LE(data) __gst_slow_read32_le((const guint8 *)(data))
static inline guint32 __gst_slow_read32_le (const guint8 * data) {
return _GST_READ_UINT32_LE (data);
}
#endif
/**
* GST_READ_UINT24_BE:
* @data: memory location
*
* Read a 24 bit unsigned integer value in big endian format from the memory buffer.
*/
#define _GST_READ_UINT24_BE(data) (_GST_GET (data, 0, 32, 16) | \
_GST_GET (data, 1, 32, 8) | \
_GST_GET (data, 2, 32, 0))
#define GST_READ_UINT24_BE(data) __gst_slow_read24_be((const guint8 *)(data))
static inline guint32 __gst_slow_read24_be (const guint8 * data) {
return _GST_READ_UINT24_BE (data);
}
/**
* GST_READ_UINT24_LE:
* @data: memory location
*
* Read a 24 bit unsigned integer value in little endian format from the memory buffer.
*/
#define _GST_READ_UINT24_LE(data) (_GST_GET (data, 2, 32, 16) | \
_GST_GET (data, 1, 32, 8) | \
_GST_GET (data, 0, 32, 0))
#define GST_READ_UINT24_LE(data) __gst_slow_read24_le((const guint8 *)(data))
static inline guint32 __gst_slow_read24_le (const guint8 * data) {
return _GST_READ_UINT24_LE (data);
}
/**
* GST_READ_UINT16_BE:
* @data: memory location
*
* Read a 16 bit unsigned integer value in big endian format from the memory buffer.
*/
/**
* GST_READ_UINT16_LE:
* @data: memory location
*
* Read a 16 bit unsigned integer value in little endian format from the memory buffer.
*/
#if GST_HAVE_UNALIGNED_ACCESS
# if (G_BYTE_ORDER == G_BIG_ENDIAN)
# define GST_READ_UINT16_BE(data) _GST_FAST_READ (16, data)
# define GST_READ_UINT16_LE(data) _GST_FAST_READ_SWAP (16, data)
# else
# define GST_READ_UINT16_BE(data) _GST_FAST_READ_SWAP (16, data)
# define GST_READ_UINT16_LE(data) _GST_FAST_READ (16, data)
# endif
#else
#define _GST_READ_UINT16_BE(data) (_GST_GET (data, 0, 16, 8) | \
_GST_GET (data, 1, 16, 0))
#define _GST_READ_UINT16_LE(data) (_GST_GET (data, 1, 16, 8) | \
_GST_GET (data, 0, 16, 0))
#define GST_READ_UINT16_BE(data) __gst_slow_read16_be((const guint8 *)(data))
static inline guint16 __gst_slow_read16_be (const guint8 * data) {
return _GST_READ_UINT16_BE (data);
}
#define GST_READ_UINT16_LE(data) __gst_slow_read16_le((const guint8 *)(data))
static inline guint16 __gst_slow_read16_le (const guint8 * data) {
return _GST_READ_UINT16_LE (data);
}
#endif
/**
* 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
* @val: value to store
*
* Store a 64 bit unsigned integer value in big endian format into the memory buffer.
*/
/**
* GST_WRITE_UINT64_LE:
* @data: memory location
* @val: value to store
*
* Store a 64 bit unsigned integer value in little endian format into the memory buffer.
*/
#if GST_HAVE_UNALIGNED_ACCESS
# if (G_BYTE_ORDER == G_BIG_ENDIAN)
# define GST_WRITE_UINT64_BE(data,val) _GST_FAST_WRITE(64,data,val)
# define GST_WRITE_UINT64_LE(data,val) _GST_FAST_WRITE_SWAP(64,data,val)
# else
# define GST_WRITE_UINT64_BE(data,val) _GST_FAST_WRITE_SWAP(64,data,val)
# define GST_WRITE_UINT64_LE(data,val) _GST_FAST_WRITE(64,data,val)
# endif
#else
#define GST_WRITE_UINT64_BE(data,val) do { \
gpointer __put_data = data; \
guint64 __put_val = val; \
_GST_PUT (__put_data, 0, 64, 56, __put_val); \
_GST_PUT (__put_data, 1, 64, 48, __put_val); \
_GST_PUT (__put_data, 2, 64, 40, __put_val); \
_GST_PUT (__put_data, 3, 64, 32, __put_val); \
_GST_PUT (__put_data, 4, 64, 24, __put_val); \
_GST_PUT (__put_data, 5, 64, 16, __put_val); \
_GST_PUT (__put_data, 6, 64, 8, __put_val); \
_GST_PUT (__put_data, 7, 64, 0, __put_val); \
} while (0)
#define GST_WRITE_UINT64_LE(data,val) do { \
gpointer __put_data = data; \
guint64 __put_val = val; \
_GST_PUT (__put_data, 0, 64, 0, __put_val); \
_GST_PUT (__put_data, 1, 64, 8, __put_val); \
_GST_PUT (__put_data, 2, 64, 16, __put_val); \
_GST_PUT (__put_data, 3, 64, 24, __put_val); \
_GST_PUT (__put_data, 4, 64, 32, __put_val); \
_GST_PUT (__put_data, 5, 64, 40, __put_val); \
_GST_PUT (__put_data, 6, 64, 48, __put_val); \
_GST_PUT (__put_data, 7, 64, 56, __put_val); \
} while (0)
#endif /* !GST_HAVE_UNALIGNED_ACCESS */
/**
* GST_WRITE_UINT32_BE:
* @data: memory location
* @val: value to store
*
* Store a 32 bit unsigned integer value in big endian format into the memory buffer.
*/
/**
* GST_WRITE_UINT32_LE:
* @data: memory location
* @val: value to store
*
* Store a 32 bit unsigned integer value in little endian format into the memory buffer.
*/
#if GST_HAVE_UNALIGNED_ACCESS
# if (G_BYTE_ORDER == G_BIG_ENDIAN)
# define GST_WRITE_UINT32_BE(data,val) _GST_FAST_WRITE(32,data,val)
# define GST_WRITE_UINT32_LE(data,val) _GST_FAST_WRITE_SWAP(32,data,val)
# else
# define GST_WRITE_UINT32_BE(data,val) _GST_FAST_WRITE_SWAP(32,data,val)
# define GST_WRITE_UINT32_LE(data,val) _GST_FAST_WRITE(32,data,val)
# endif
#else
#define GST_WRITE_UINT32_BE(data,val) do { \
gpointer __put_data = data; \
guint32 __put_val = val; \
_GST_PUT (__put_data, 0, 32, 24, __put_val); \
_GST_PUT (__put_data, 1, 32, 16, __put_val); \
_GST_PUT (__put_data, 2, 32, 8, __put_val); \
_GST_PUT (__put_data, 3, 32, 0, __put_val); \
} while (0)
#define GST_WRITE_UINT32_LE(data,val) do { \
gpointer __put_data = data; \
guint32 __put_val = val; \
_GST_PUT (__put_data, 0, 32, 0, __put_val); \
_GST_PUT (__put_data, 1, 32, 8, __put_val); \
_GST_PUT (__put_data, 2, 32, 16, __put_val); \
_GST_PUT (__put_data, 3, 32, 24, __put_val); \
} while (0)
#endif /* !GST_HAVE_UNALIGNED_ACCESS */
/**
* 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.
*/
#define GST_WRITE_UINT24_BE(data, num) do { \
gpointer __put_data = data; \
guint32 __put_val = num; \
_GST_PUT (__put_data, 0, 32, 16, __put_val); \
_GST_PUT (__put_data, 1, 32, 8, __put_val); \
_GST_PUT (__put_data, 2, 32, 0, __put_val); \
} 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.
*/
#define GST_WRITE_UINT24_LE(data, num) do { \
gpointer __put_data = data; \
guint32 __put_val = num; \
_GST_PUT (__put_data, 0, 32, 0, __put_val); \
_GST_PUT (__put_data, 1, 32, 8, __put_val); \
_GST_PUT (__put_data, 2, 32, 16, __put_val); \
} while (0)
/**
* GST_WRITE_UINT16_BE:
* @data: memory location
* @val: value to store
*
* Store a 16 bit unsigned integer value in big endian format into the memory buffer.
*/
/**
* GST_WRITE_UINT16_LE:
* @data: memory location
* @val: value to store
*
* Store a 16 bit unsigned integer value in little endian format into the memory buffer.
*/
#if GST_HAVE_UNALIGNED_ACCESS
# if (G_BYTE_ORDER == G_BIG_ENDIAN)
# define GST_WRITE_UINT16_BE(data,val) _GST_FAST_WRITE(16,data,val)
# define GST_WRITE_UINT16_LE(data,val) _GST_FAST_WRITE_SWAP(16,data,val)
# else
# define GST_WRITE_UINT16_BE(data,val) _GST_FAST_WRITE_SWAP(16,data,val)
# define GST_WRITE_UINT16_LE(data,val) _GST_FAST_WRITE(16,data,val)
# endif
#else
#define GST_WRITE_UINT16_BE(data,val) do { \
gpointer __put_data = data; \
guint16 __put_val = val; \
_GST_PUT (__put_data, 0, 16, 8, __put_val); \
_GST_PUT (__put_data, 1, 16, 0, __put_val); \
} while (0)
#define GST_WRITE_UINT16_LE(data,val) do { \
gpointer __put_data = data; \
guint16 __put_val = val; \
_GST_PUT (__put_data, 0, 16, 0, __put_val); \
_GST_PUT (__put_data, 1, 16, 8, __put_val); \
} while (0)
#endif /* !GST_HAVE_UNALIGNED_ACCESS */
/**
* 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 endianness 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.
*/
static inline 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.
*/
static inline 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.
*/
/**
* GDOUBLE_TO_BE:
* @val: value
*
* Convert 64-bit floating point value (double) from native byte order into
* big endian byte order.
*/
/**
* GDOUBLE_FROM_LE:
* @val: value
*
* Convert 64-bit floating point value (double) from little endian byte order
* into native byte order.
*/
/**
* GDOUBLE_FROM_BE:
* @val: value
*
* Convert 64-bit floating point value (double) from big endian byte order
* into native byte order.
*/
/**
* GFLOAT_TO_LE:
* @val: value
*
* Convert 32-bit floating point value (float) from native byte order into
* little endian byte order.
*/
/**
* GFLOAT_TO_BE:
* @val: value
*
* Convert 32-bit floating point value (float) from native byte order into
* big endian byte order.
*/
/**
* GFLOAT_FROM_LE:
* @val: value
*
* Convert 32-bit floating point value (float) from little endian byte order
* into native byte order.
*/
/**
* GFLOAT_FROM_BE:
* @val: value
*
* Convert 32-bit floating point value (float) from big endian byte order
* into native byte order.
*/
#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
*/
static inline 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
*/
static inline 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
*/
static inline 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
*/
static inline 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.
*/
static inline 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.
*/
static inline 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.
*/
static inline 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.
*/
static inline 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_UP_128:
* @num: integer value to round up
*
* Rounds an integer value up to the next multiple of 128.
* Since: 1.4
*/
#define GST_ROUND_UP_128(num) (((num)+127)&~127)
/**
* GST_ROUND_UP_N:
* @num: integrer value to round up
* @align: a power of two to round up to
*
* Rounds an integer value up to the next multiple of @align. @align MUST be a
* power of two.
*/
#define GST_ROUND_UP_N(num,align) ((((num) + ((align) - 1)) & ~((align) - 1)))
/**
* GST_ROUND_DOWN_2:
* @num: integer value to round down
*
* Rounds an integer value down to the next multiple of 2.
*/
#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.
*/
#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.
*/
#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.
*/
#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.
*/
#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.
*/
#define GST_ROUND_DOWN_64(num) ((num)&(~63))
/**
* GST_ROUND_DOWN_128:
* @num: integer value to round down
*
* Rounds an integer value down to the next multiple of 128.
* Since: 1.4
*/
#define GST_ROUND_DOWN_128(num) ((num)&(~127))
/**
* GST_ROUND_DOWN_N:
* @num: integrer value to round down
* @align: a power of two to round down to
*
* Rounds an integer value down to the next multiple of @align. @align MUST be a
* power of two.
*/
#define GST_ROUND_DOWN_N(num,align) (((num) & ~((align) - 1)))
GST_API
void gst_object_default_error (GstObject * source,
const GError * error,
const gchar * debug);
/* element functions */
GST_API
void gst_element_create_all_pads (GstElement *element);
GST_API
GstPad* gst_element_get_compatible_pad (GstElement *element, GstPad *pad,
GstCaps *caps);
GST_API
GstPadTemplate* gst_element_get_compatible_pad_template (GstElement *element, GstPadTemplate *compattempl);
GST_API
const gchar* gst_element_state_get_name (GstState state);
GST_API
const gchar * gst_element_state_change_return_get_name (GstStateChangeReturn state_ret);
GST_API
const gchar * gst_state_change_get_name (GstStateChange transition);
GST_API
gboolean gst_element_link (GstElement *src, GstElement *dest);
GST_API
gboolean gst_element_link_many (GstElement *element_1,
GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
GST_API
gboolean gst_element_link_filtered (GstElement * src,
GstElement * dest,
GstCaps *filter);
GST_API
void gst_element_unlink (GstElement *src, GstElement *dest);
GST_API
void gst_element_unlink_many (GstElement *element_1,
GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
GST_API
gboolean gst_element_link_pads (GstElement *src, const gchar *srcpadname,
GstElement *dest, const gchar *destpadname);
GST_API
gboolean gst_element_link_pads_full (GstElement *src, const gchar *srcpadname,
GstElement *dest, const gchar *destpadname,
GstPadLinkCheck flags);
GST_API
void gst_element_unlink_pads (GstElement *src, const gchar *srcpadname,
GstElement *dest, const gchar *destpadname);
GST_API
gboolean gst_element_link_pads_filtered (GstElement * src, const gchar * srcpadname,
GstElement * dest, const gchar * destpadname,
GstCaps *filter);
GST_API
gboolean gst_element_seek_simple (GstElement *element,
GstFormat format,
GstSeekFlags seek_flags,
gint64 seek_pos);
/* util elementfactory functions */
GST_API
gboolean gst_element_factory_can_sink_all_caps (GstElementFactory *factory, const GstCaps *caps);
GST_API
gboolean gst_element_factory_can_src_all_caps (GstElementFactory *factory, const GstCaps *caps);
GST_API
gboolean gst_element_factory_can_sink_any_caps (GstElementFactory *factory, const GstCaps *caps);
GST_API
gboolean gst_element_factory_can_src_any_caps (GstElementFactory *factory, const GstCaps *caps);
/* util query functions */
GST_API
gboolean gst_element_query_position (GstElement *element, GstFormat format, gint64 *cur);
GST_API
gboolean gst_element_query_duration (GstElement *element, GstFormat format, gint64 *duration);
GST_API
gboolean gst_element_query_convert (GstElement *element, GstFormat src_format, gint64 src_val,
GstFormat dest_format, gint64 *dest_val);
/* pad functions */
GST_API
void gst_pad_use_fixed_caps (GstPad *pad);
GST_API
GstElement* gst_pad_get_parent_element (GstPad *pad);
/* util query functions */
GST_API
gboolean gst_pad_proxy_query_accept_caps (GstPad *pad, GstQuery *query);
GST_API
gboolean gst_pad_proxy_query_caps (GstPad *pad, GstQuery *query);
GST_API
gboolean gst_pad_query_position (GstPad *pad, GstFormat format, gint64 *cur);
GST_API
gboolean gst_pad_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
GST_API
gboolean gst_pad_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
GstFormat dest_format, gint64 *dest_val);
GST_API
GstCaps * gst_pad_query_caps (GstPad *pad, GstCaps *filter);
GST_API
gboolean gst_pad_query_accept_caps (GstPad *pad, GstCaps *caps);
GST_API
gboolean gst_pad_link_maybe_ghosting (GstPad *src,
GstPad *sink);
GST_API
gboolean gst_pad_link_maybe_ghosting_full (GstPad *src,
GstPad *sink,
GstPadLinkCheck flags);
GST_API
gboolean gst_pad_peer_query_position (GstPad *pad, GstFormat format, gint64 *cur);
GST_API
gboolean gst_pad_peer_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
GST_API
gboolean gst_pad_peer_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
GstFormat dest_format, gint64 *dest_val);
GST_API
GstCaps * gst_pad_peer_query_caps (GstPad * pad, GstCaps *filter);
GST_API
gboolean gst_pad_peer_query_accept_caps (GstPad * pad, GstCaps *caps);
GST_API
gchar * gst_pad_create_stream_id (GstPad * pad, GstElement * parent, const gchar *stream_id) G_GNUC_MALLOC;
GST_API
gchar * gst_pad_create_stream_id_printf (GstPad * pad, GstElement * parent, const gchar *stream_id, ...) G_GNUC_PRINTF (3, 4) G_GNUC_MALLOC;
GST_API
gchar * gst_pad_create_stream_id_printf_valist (GstPad * pad, GstElement * parent, const gchar *stream_id, va_list var_args) G_GNUC_PRINTF (3, 0) G_GNUC_MALLOC;
GST_API
gchar * gst_pad_get_stream_id (GstPad * pad);
GST_API
GstStream * gst_pad_get_stream (GstPad * pad);
/* bin functions */
GST_API
void gst_bin_add_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
GST_API
void gst_bin_remove_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
GST_API
GstPad * gst_bin_find_unlinked_pad (GstBin *bin, GstPadDirection direction);
GST_API
gboolean gst_bin_sync_children_states (GstBin *bin);
/* parse utility functions */
GST_API
GstElement * gst_parse_bin_from_description (const gchar * bin_description,
gboolean ghost_unlinked_pads,
GError ** err);
GST_API
GstElement * gst_parse_bin_from_description_full (const gchar * bin_description,
gboolean ghost_unlinked_pads,
GstParseContext * context,
GstParseFlags flags,
GError ** err);
GST_API
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.
*/
typedef enum {
GST_SEARCH_MODE_EXACT = 0,
GST_SEARCH_MODE_BEFORE,
GST_SEARCH_MODE_AFTER
} GstSearchMode;
GST_API
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);
/* fraction operations */
GST_API
gint gst_util_greatest_common_divisor (gint a, gint b);
GST_API
gint64 gst_util_greatest_common_divisor_int64 (gint64 a, gint64 b);
GST_API
void gst_util_fraction_to_double (gint src_n, gint src_d, gdouble *dest);
GST_API
void gst_util_double_to_fraction (gdouble src, gint *dest_n, gint *dest_d);
GST_API
gboolean gst_util_fraction_multiply (gint a_n, gint a_d, gint b_n, gint b_d,
gint *res_n, gint *res_d);
GST_API
gboolean gst_util_fraction_add (gint a_n, gint a_d, gint b_n, gint b_d,
gint *res_n, gint *res_d);
GST_API
gint gst_util_fraction_compare (gint a_n, gint a_d, gint b_n, gint b_d);
GST_API
gboolean gst_calculate_linear_regression (const GstClockTime * xy,
GstClockTime * temp, guint n,
GstClockTime * m_num, GstClockTime * m_denom,
GstClockTime * b, GstClockTime * xbase,
gdouble * r_squared);
GST_API
void gst_type_mark_as_plugin_api (GType type);
GST_API
gboolean gst_type_is_plugin_api (GType type);
G_END_DECLS
#endif /* __GST_UTILS_H__ */
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