2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
4 * 2002 Thomas Vander Stichele <thomas@apestaart.org>
6 * gstutils.h: Header for various utility functions
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
25 #ifndef __GST_UTILS_H__
26 #define __GST_UTILS_H__
29 #include <gst/gstconfig.h>
30 #include <gst/gstbin.h>
31 #include <gst/gstparse.h>
35 void gst_util_set_value_from_string (GValue *value, const gchar *value_str);
36 void gst_util_set_object_arg (GObject *object, const gchar *name, const gchar *value);
37 void gst_util_dump_mem (const guchar *mem, guint size);
39 guint64 gst_util_gdouble_to_guint64 (gdouble value) G_GNUC_CONST;
40 gdouble gst_util_guint64_to_gdouble (guint64 value) G_GNUC_CONST;
43 * gst_guint64_to_gdouble:
44 * @value: the #guint64 value to convert
46 * Convert @value to a gdouble.
48 * Returns: @value converted to a #gdouble.
52 * gst_gdouble_to_guint64:
53 * @value: the #gdouble value to convert
55 * Convert @value to a guint64.
57 * Returns: @value converted to a #guint64.
60 #define gst_gdouble_to_guint64(value) gst_util_gdouble_to_guint64(value)
61 #define gst_guint64_to_gdouble(value) gst_util_guint64_to_gdouble(value)
63 #define gst_gdouble_to_guint64(value) ((guint64) (value))
64 #define gst_guint64_to_gdouble(value) ((gdouble) (value))
67 guint64 gst_util_uint64_scale (guint64 val, guint64 num, guint64 denom);
68 guint64 gst_util_uint64_scale_round (guint64 val, guint64 num, guint64 denom);
69 guint64 gst_util_uint64_scale_ceil (guint64 val, guint64 num, guint64 denom);
71 guint64 gst_util_uint64_scale_int (guint64 val, gint num, gint denom);
72 guint64 gst_util_uint64_scale_int_round (guint64 val, gint num, gint denom);
73 guint64 gst_util_uint64_scale_int_ceil (guint64 val, gint num, gint denom);
75 guint32 gst_util_seqnum_next (void);
76 gint32 gst_util_seqnum_compare (guint32 s1, guint32 s2);
81 * @parent_class_cast: the name of the class cast macro for the parent type
82 * @name: name of the function to call
83 * @args: arguments enclosed in '( )'
85 * Just call the parent handler. This assumes that there is a variable
86 * named parent_class that points to the (duh!) parent class. Note that
87 * this macro is not to be used with things that return something, use
88 * the _WITH_DEFAULT version for that
90 #define GST_CALL_PARENT(parent_class_cast, name, args) \
91 ((parent_class_cast(parent_class)->name != NULL) ? \
92 parent_class_cast(parent_class)->name args : (void) 0)
95 * GST_CALL_PARENT_WITH_DEFAULT:
96 * @parent_class_cast: the name of the class cast macro for the parent type
97 * @name: name of the function to call
98 * @args: arguments enclosed in '( )'
99 * @def_return: default result
101 * Same as GST_CALL_PARENT(), but in case there is no implementation, it
102 * evaluates to @def_return.
104 #define GST_CALL_PARENT_WITH_DEFAULT(parent_class_cast, name, args, def_return)\
105 ((parent_class_cast(parent_class)->name != NULL) ? \
106 parent_class_cast(parent_class)->name args : def_return)
108 /* Define PUT and GET functions for unaligned memory */
109 #define _GST_GET(__data, __idx, __size, __shift) \
110 (((guint##__size) (((const guint8 *) (__data))[__idx])) << (__shift))
112 #define _GST_PUT(__data, __idx, __size, __shift, __num) \
113 (((guint8 *) (__data))[__idx] = (((guint##__size) (__num)) >> (__shift)) & 0xff)
115 #if GST_HAVE_UNALIGNED_ACCESS
116 static inline guint16 __gst_fast_read16(const guint8 *v) {
117 return *(const guint16*)(v);
119 static inline guint32 __gst_fast_read32(const guint8 *v) {
120 return *(const guint32*)(v);
122 static inline guint64 __gst_fast_read64(const guint8 *v) {
123 return *(const guint64*)(v);
125 static inline guint16 __gst_fast_read_swap16(const guint8 *v) {
126 return GUINT16_SWAP_LE_BE(*(const guint16*)(v));
128 static inline guint32 __gst_fast_read_swap32(const guint8 *v) {
129 return GUINT32_SWAP_LE_BE(*(const guint32*)(v));
131 static inline guint64 __gst_fast_read_swap64(const guint8 *v) {
132 return GUINT64_SWAP_LE_BE(*(const guint64*)(v));
134 # define _GST_FAST_READ(s, d) __gst_fast_read##s((const guint8 *)(d))
135 # define _GST_FAST_READ_SWAP(s, d) __gst_fast_read_swap##s((const guint8 *)(d))
140 * GST_READ_UINT64_BE:
141 * @data: memory location
143 * Read a 64 bit unsigned integer value in big endian format from the memory buffer.
147 * GST_READ_UINT64_LE:
148 * @data: memory location
150 * Read a 64 bit unsigned integer value in little endian format from the memory buffer.
152 #if GST_HAVE_UNALIGNED_ACCESS
153 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
154 # define GST_READ_UINT64_BE(data) _GST_FAST_READ (64, data)
155 # define GST_READ_UINT64_LE(data) _GST_FAST_READ_SWAP (64, data)
157 # define GST_READ_UINT64_BE(data) _GST_FAST_READ_SWAP (64, data)
158 # define GST_READ_UINT64_LE(data) _GST_FAST_READ (64, data)
161 # define GST_READ_UINT64_BE(data) (_GST_GET (data, 0, 64, 56) | \
162 _GST_GET (data, 1, 64, 48) | \
163 _GST_GET (data, 2, 64, 40) | \
164 _GST_GET (data, 3, 64, 32) | \
165 _GST_GET (data, 4, 64, 24) | \
166 _GST_GET (data, 5, 64, 16) | \
167 _GST_GET (data, 6, 64, 8) | \
168 _GST_GET (data, 7, 64, 0))
170 # define GST_READ_UINT64_LE(data) (_GST_GET (data, 7, 64, 56) | \
171 _GST_GET (data, 6, 64, 48) | \
172 _GST_GET (data, 5, 64, 40) | \
173 _GST_GET (data, 4, 64, 32) | \
174 _GST_GET (data, 3, 64, 24) | \
175 _GST_GET (data, 2, 64, 16) | \
176 _GST_GET (data, 1, 64, 8) | \
177 _GST_GET (data, 0, 64, 0))
181 * GST_READ_UINT32_BE:
182 * @data: memory location
184 * Read a 32 bit unsigned integer value in big endian format from the memory buffer.
188 * GST_READ_UINT32_LE:
189 * @data: memory location
191 * Read a 32 bit unsigned integer value in little endian format from the memory buffer.
193 #if GST_HAVE_UNALIGNED_ACCESS
194 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
195 # define GST_READ_UINT32_BE(data) _GST_FAST_READ (32, data)
196 # define GST_READ_UINT32_LE(data) _GST_FAST_READ_SWAP (32, data)
198 # define GST_READ_UINT32_BE(data) _GST_FAST_READ_SWAP (32, data)
199 # define GST_READ_UINT32_LE(data) _GST_FAST_READ (32, data)
202 # define GST_READ_UINT32_BE(data) (_GST_GET (data, 0, 32, 24) | \
203 _GST_GET (data, 1, 32, 16) | \
204 _GST_GET (data, 2, 32, 8) | \
205 _GST_GET (data, 3, 32, 0))
207 # define GST_READ_UINT32_LE(data) (_GST_GET (data, 3, 32, 24) | \
208 _GST_GET (data, 2, 32, 16) | \
209 _GST_GET (data, 1, 32, 8) | \
210 _GST_GET (data, 0, 32, 0))
214 * GST_READ_UINT24_BE:
215 * @data: memory location
217 * Read a 24 bit unsigned integer value in big endian format from the memory buffer.
221 #define GST_READ_UINT24_BE(data) (_GST_GET (data, 0, 32, 16) | \
222 _GST_GET (data, 1, 32, 8) | \
223 _GST_GET (data, 2, 32, 0))
226 * GST_READ_UINT24_LE:
227 * @data: memory location
229 * Read a 24 bit unsigned integer value in little endian format from the memory buffer.
233 #define GST_READ_UINT24_LE(data) (_GST_GET (data, 2, 32, 16) | \
234 _GST_GET (data, 1, 32, 8) | \
235 _GST_GET (data, 0, 32, 0))
238 * GST_READ_UINT16_BE:
239 * @data: memory location
241 * Read a 16 bit unsigned integer value in big endian format from the memory buffer.
244 * GST_READ_UINT16_LE:
245 * @data: memory location
247 * Read a 16 bit unsigned integer value in little endian format from the memory buffer.
249 #if GST_HAVE_UNALIGNED_ACCESS
250 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
251 # define GST_READ_UINT16_BE(data) _GST_FAST_READ (16, data)
252 # define GST_READ_UINT16_LE(data) _GST_FAST_READ_SWAP (16, data)
254 # define GST_READ_UINT16_BE(data) _GST_FAST_READ_SWAP (16, data)
255 # define GST_READ_UINT16_LE(data) _GST_FAST_READ (16, data)
258 # define GST_READ_UINT16_BE(data) (_GST_GET (data, 0, 16, 8) | \
259 _GST_GET (data, 1, 16, 0))
261 # define GST_READ_UINT16_LE(data) (_GST_GET (data, 1, 16, 8) | \
262 _GST_GET (data, 0, 16, 0))
267 * @data: memory location
269 * Read an 8 bit unsigned integer value from the memory buffer.
271 #define GST_READ_UINT8(data) (_GST_GET (data, 0, 8, 0))
274 * GST_WRITE_UINT64_BE:
275 * @data: memory location
276 * @num: value to store
278 * Store a 64 bit unsigned integer value in big endian format into the memory buffer.
280 #define GST_WRITE_UINT64_BE(data, num) do { \
281 _GST_PUT (data, 0, 64, 56, num); \
282 _GST_PUT (data, 1, 64, 48, num); \
283 _GST_PUT (data, 2, 64, 40, num); \
284 _GST_PUT (data, 3, 64, 32, num); \
285 _GST_PUT (data, 4, 64, 24, num); \
286 _GST_PUT (data, 5, 64, 16, num); \
287 _GST_PUT (data, 6, 64, 8, num); \
288 _GST_PUT (data, 7, 64, 0, num); \
292 * GST_WRITE_UINT64_LE:
293 * @data: memory location
294 * @num: value to store
296 * Store a 64 bit unsigned integer value in little endian format into the memory buffer.
298 #define GST_WRITE_UINT64_LE(data, num) do { \
299 _GST_PUT (data, 0, 64, 0, num); \
300 _GST_PUT (data, 1, 64, 8, num); \
301 _GST_PUT (data, 2, 64, 16, num); \
302 _GST_PUT (data, 3, 64, 24, num); \
303 _GST_PUT (data, 4, 64, 32, num); \
304 _GST_PUT (data, 5, 64, 40, num); \
305 _GST_PUT (data, 6, 64, 48, num); \
306 _GST_PUT (data, 7, 64, 56, num); \
310 * GST_WRITE_UINT32_BE:
311 * @data: memory location
312 * @num: value to store
314 * Store a 32 bit unsigned integer value in big endian format into the memory buffer.
316 #define GST_WRITE_UINT32_BE(data, num) do { \
317 _GST_PUT (data, 0, 32, 24, num); \
318 _GST_PUT (data, 1, 32, 16, num); \
319 _GST_PUT (data, 2, 32, 8, num); \
320 _GST_PUT (data, 3, 32, 0, num); \
324 * GST_WRITE_UINT32_LE:
325 * @data: memory location
326 * @num: value to store
328 * Store a 32 bit unsigned integer value in little endian format into the memory buffer.
330 #define GST_WRITE_UINT32_LE(data, num) do { \
331 _GST_PUT (data, 0, 32, 0, num); \
332 _GST_PUT (data, 1, 32, 8, num); \
333 _GST_PUT (data, 2, 32, 16, num); \
334 _GST_PUT (data, 3, 32, 24, num); \
338 * GST_WRITE_UINT24_BE:
339 * @data: memory location
340 * @num: value to store
342 * Store a 24 bit unsigned integer value in big endian format into the memory buffer.
346 #define GST_WRITE_UINT24_BE(data, num) do { \
347 _GST_PUT (data, 0, 32, 16, num); \
348 _GST_PUT (data, 1, 32, 8, num); \
349 _GST_PUT (data, 2, 32, 0, num); \
353 * GST_WRITE_UINT24_LE:
354 * @data: memory location
355 * @num: value to store
357 * Store a 24 bit unsigned integer value in little endian format into the memory buffer.
361 #define GST_WRITE_UINT24_LE(data, num) do { \
362 _GST_PUT (data, 0, 32, 0, num); \
363 _GST_PUT (data, 1, 32, 8, num); \
364 _GST_PUT (data, 2, 32, 16, num); \
368 * GST_WRITE_UINT16_BE:
369 * @data: memory location
370 * @num: value to store
372 * Store a 16 bit unsigned integer value in big endian format into the memory buffer.
374 #define GST_WRITE_UINT16_BE(data, num) do { \
375 _GST_PUT (data, 0, 16, 8, num); \
376 _GST_PUT (data, 1, 16, 0, num); \
380 * GST_WRITE_UINT16_LE:
381 * @data: memory location
382 * @num: value to store
384 * Store a 16 bit unsigned integer value in little endian format into the memory buffer.
386 #define GST_WRITE_UINT16_LE(data, num) do { \
387 _GST_PUT (data, 0, 16, 0, num); \
388 _GST_PUT (data, 1, 16, 8, num); \
393 * @data: memory location
394 * @num: value to store
396 * Store an 8 bit unsigned integer value into the memory buffer.
398 #define GST_WRITE_UINT8(data, num) do { \
399 _GST_PUT (data, 0, 8, 0, num); \
402 /* Float endianness conversion macros */
404 /* FIXME: Remove this once we depend on a GLib version with this */
405 #ifndef GFLOAT_FROM_LE
410 * Swap byte order of a 32-bit floating point value (float).
412 * Returns: @in byte-swapped.
417 #ifdef _FOOL_GTK_DOC_
418 G_INLINE_FUNC gfloat GFLOAT_SWAP_LE_BE (gfloat in);
422 GFLOAT_SWAP_LE_BE(gfloat in)
431 u.i = GUINT32_SWAP_LE_BE (u.i);
436 * GDOUBLE_SWAP_LE_BE:
439 * Swap byte order of a 64-bit floating point value (double).
441 * Returns: @in byte-swapped.
446 #ifdef _FOOL_GTK_DOC_
447 G_INLINE_FUNC gdouble GDOUBLE_SWAP_LE_BE (gdouble in);
450 inline static gdouble
451 GDOUBLE_SWAP_LE_BE(gdouble in)
460 u.i = GUINT64_SWAP_LE_BE (u.i);
468 * Convert 64-bit floating point value (double) from native byte order into
469 * little endian byte order.
478 * Convert 64-bit floating point value (double) from native byte order into
479 * big endian byte order.
488 * Convert 64-bit floating point value (double) from little endian byte order
489 * into native byte order.
498 * Convert 64-bit floating point value (double) from big endian byte order
499 * into native byte order.
509 * Convert 32-bit floating point value (float) from native byte order into
510 * little endian byte order.
519 * Convert 32-bit floating point value (float) from native byte order into
520 * big endian byte order.
529 * Convert 32-bit floating point value (float) from little endian byte order
530 * into native byte order.
539 * Convert 32-bit floating point value (float) from big endian byte order
540 * into native byte order.
546 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
547 #define GFLOAT_TO_LE(val) ((gfloat) (val))
548 #define GFLOAT_TO_BE(val) (GFLOAT_SWAP_LE_BE (val))
549 #define GDOUBLE_TO_LE(val) ((gdouble) (val))
550 #define GDOUBLE_TO_BE(val) (GDOUBLE_SWAP_LE_BE (val))
552 #elif G_BYTE_ORDER == G_BIG_ENDIAN
553 #define GFLOAT_TO_LE(val) (GFLOAT_SWAP_LE_BE (val))
554 #define GFLOAT_TO_BE(val) ((gfloat) (val))
555 #define GDOUBLE_TO_LE(val) (GDOUBLE_SWAP_LE_BE (val))
556 #define GDOUBLE_TO_BE(val) ((gdouble) (val))
558 #else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
559 #error unknown ENDIAN type
560 #endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
562 #define GFLOAT_FROM_LE(val) (GFLOAT_TO_LE (val))
563 #define GFLOAT_FROM_BE(val) (GFLOAT_TO_BE (val))
564 #define GDOUBLE_FROM_LE(val) (GDOUBLE_TO_LE (val))
565 #define GDOUBLE_FROM_BE(val) (GDOUBLE_TO_BE (val))
567 #endif /* !defined(GFLOAT_FROM_LE) */
571 * @data: memory location
573 * Read a 32 bit float value in little endian format from the memory buffer.
575 * Returns: The floating point value read from @data
580 #ifdef _FOOL_GTK_DOC_
581 G_INLINE_FUNC gfloat GST_READ_FLOAT_LE (const guint8 *data);
585 GST_READ_FLOAT_LE(const guint8 *data)
593 u.i = GST_READ_UINT32_LE (data);
599 * @data: memory location
601 * Read a 32 bit float value in big endian format from the memory buffer.
603 * Returns: The floating point value read from @data
608 #ifdef _FOOL_GTK_DOC_
609 G_INLINE_FUNC gfloat GST_READ_FLOAT_BE (const guint8 *data);
613 GST_READ_FLOAT_BE(const guint8 *data)
621 u.i = GST_READ_UINT32_BE (data);
626 * GST_READ_DOUBLE_LE:
627 * @data: memory location
629 * Read a 64 bit double value in little endian format from the memory buffer.
631 * Returns: The double-precision floating point value read from @data
636 #ifdef _FOOL_GTK_DOC_
637 G_INLINE_FUNC gdouble GST_READ_DOUBLE_LE (const guint8 *data);
640 inline static gdouble
641 GST_READ_DOUBLE_LE(const guint8 *data)
649 u.i = GST_READ_UINT64_LE (data);
654 * GST_READ_DOUBLE_BE:
655 * @data: memory location
657 * Read a 64 bit double value in big endian format from the memory buffer.
659 * Returns: The double-precision floating point value read from @data
664 #ifdef _FOOL_GTK_DOC_
665 G_INLINE_FUNC gdouble GST_READ_DOUBLE_BE (const guint8 *data);
668 inline static gdouble
669 GST_READ_DOUBLE_BE(const guint8 *data)
677 u.i = GST_READ_UINT64_BE (data);
682 * GST_WRITE_FLOAT_LE:
683 * @data: memory location
684 * @num: value to store
686 * Store a 32 bit float value in little endian format into the memory buffer.
691 #ifdef _FOOL_GTK_DOC_
692 G_INLINE_FUNC void GST_WRITE_FLOAT_LE (guint8 *data, gfloat num);
696 GST_WRITE_FLOAT_LE(guint8 *data, gfloat num)
705 GST_WRITE_UINT32_LE (data, u.i);
709 * GST_WRITE_FLOAT_BE:
710 * @data: memory location
711 * @num: value to store
713 * Store a 32 bit float value in big endian format into the memory buffer.
718 #ifdef _FOOL_GTK_DOC_
719 G_INLINE_FUNC void GST_WRITE_FLOAT_BE (guint8 *data, gfloat num);
723 GST_WRITE_FLOAT_BE(guint8 *data, gfloat num)
732 GST_WRITE_UINT32_BE (data, u.i);
736 * GST_WRITE_DOUBLE_LE:
737 * @data: memory location
738 * @num: value to store
740 * Store a 64 bit double value in little endian format into the memory buffer.
745 #ifdef _FOOL_GTK_DOC_
746 G_INLINE_FUNC void GST_WRITE_DOUBLE_LE (guint8 *data, gdouble num);
750 GST_WRITE_DOUBLE_LE(guint8 *data, gdouble num)
759 GST_WRITE_UINT64_LE (data, u.i);
763 * GST_WRITE_DOUBLE_BE:
764 * @data: memory location
765 * @num: value to store
767 * Store a 64 bit double value in big endian format into the memory buffer.
772 #ifdef _FOOL_GTK_DOC_
773 G_INLINE_FUNC void GST_WRITE_DOUBLE_BE (guint8 *data, gdouble num);
777 GST_WRITE_DOUBLE_BE(guint8 *data, gdouble num)
786 GST_WRITE_UINT64_BE (data, u.i);
789 /* Miscellaneous utility macros */
793 * @num: integer value to round up
795 * Rounds an integer value up to the next multiple of 2.
797 #define GST_ROUND_UP_2(num) (((num)+1)&~1)
800 * @num: integer value to round up
802 * Rounds an integer value up to the next multiple of 4.
804 #define GST_ROUND_UP_4(num) (((num)+3)&~3)
807 * @num: integer value to round up
809 * Rounds an integer value up to the next multiple of 8.
811 #define GST_ROUND_UP_8(num) (((num)+7)&~7)
814 * @num: integer value to round up
816 * Rounds an integer value up to the next multiple of 16.
818 #define GST_ROUND_UP_16(num) (((num)+15)&~15)
821 * @num: integer value to round up
823 * Rounds an integer value up to the next multiple of 32.
825 #define GST_ROUND_UP_32(num) (((num)+31)&~31)
828 * @num: integer value to round up
830 * Rounds an integer value up to the next multiple of 64.
832 #define GST_ROUND_UP_64(num) (((num)+63)&~63)
836 * @num: integer value to round down
838 * Rounds an integer value down to the next multiple of 2.
842 #define GST_ROUND_DOWN_2(num) ((num)&(~1))
845 * @num: integer value to round down
847 * Rounds an integer value down to the next multiple of 4.
851 #define GST_ROUND_DOWN_4(num) ((num)&(~3))
854 * @num: integer value to round down
856 * Rounds an integer value down to the next multiple of 8.
860 #define GST_ROUND_DOWN_8(num) ((num)&(~7))
863 * @num: integer value to round down
865 * Rounds an integer value down to the next multiple of 16.
869 #define GST_ROUND_DOWN_16(num) ((num)&(~15))
872 * @num: integer value to round down
874 * Rounds an integer value down to the next multiple of 32.
878 #define GST_ROUND_DOWN_32(num) ((num)&(~31))
881 * @num: integer value to round down
883 * Rounds an integer value down to the next multiple of 64.
887 #define GST_ROUND_DOWN_64(num) ((num)&(~63))
889 void gst_object_default_error (GstObject * source,
890 const GError * error,
891 const gchar * debug);
893 /* element functions */
894 void gst_element_create_all_pads (GstElement *element);
895 GstPad* gst_element_get_compatible_pad (GstElement *element, GstPad *pad,
898 GstPadTemplate* gst_element_get_compatible_pad_template (GstElement *element, GstPadTemplate *compattempl);
900 const gchar* gst_element_state_get_name (GstState state);
901 const gchar * gst_element_state_change_return_get_name (GstStateChangeReturn state_ret);
903 gboolean gst_element_link (GstElement *src, GstElement *dest);
904 gboolean gst_element_link_many (GstElement *element_1,
905 GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
906 gboolean gst_element_link_filtered (GstElement * src,
909 void gst_element_unlink (GstElement *src, GstElement *dest);
910 void gst_element_unlink_many (GstElement *element_1,
911 GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
913 gboolean gst_element_link_pads (GstElement *src, const gchar *srcpadname,
914 GstElement *dest, const gchar *destpadname);
915 gboolean gst_element_link_pads_full (GstElement *src, const gchar *srcpadname,
916 GstElement *dest, const gchar *destpadname,
917 GstPadLinkCheck flags);
918 void gst_element_unlink_pads (GstElement *src, const gchar *srcpadname,
919 GstElement *dest, const gchar *destpadname);
921 gboolean gst_element_link_pads_filtered (GstElement * src, const gchar * srcpadname,
922 GstElement * dest, const gchar * destpadname,
925 gboolean gst_element_seek_simple (GstElement *element,
927 GstSeekFlags seek_flags,
930 /* util elementfactory functions */
931 gboolean gst_element_factory_can_sink_all_caps (GstElementFactory *factory, const GstCaps *caps);
932 gboolean gst_element_factory_can_src_all_caps (GstElementFactory *factory, const GstCaps *caps);
933 gboolean gst_element_factory_can_sink_any_caps (GstElementFactory *factory, const GstCaps *caps);
934 gboolean gst_element_factory_can_src_any_caps (GstElementFactory *factory, const GstCaps *caps);
936 /* util query functions */
937 gboolean gst_element_query_position (GstElement *element, GstFormat format, gint64 *cur);
938 gboolean gst_element_query_duration (GstElement *element, GstFormat format, gint64 *duration);
939 gboolean gst_element_query_convert (GstElement *element, GstFormat src_format, gint64 src_val,
940 GstFormat dest_format, gint64 *dest_val);
943 void gst_pad_use_fixed_caps (GstPad *pad);
944 GstElement* gst_pad_get_parent_element (GstPad *pad);
946 /* util query functions */
947 gboolean gst_pad_proxy_query_accept_caps (GstPad *pad, GstQuery *query);
948 gboolean gst_pad_proxy_query_caps (GstPad *pad, GstQuery *query);
950 gboolean gst_pad_query_position (GstPad *pad, GstFormat format, gint64 *cur);
951 gboolean gst_pad_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
952 gboolean gst_pad_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
953 GstFormat dest_format, gint64 *dest_val);
954 GstCaps * gst_pad_query_caps (GstPad *pad, GstCaps *filter);
955 gboolean gst_pad_query_accept_caps (GstPad *pad, GstCaps *caps);
958 gboolean gst_pad_peer_query_position (GstPad *pad, GstFormat format, gint64 *cur);
959 gboolean gst_pad_peer_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
960 gboolean gst_pad_peer_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
961 GstFormat dest_format, gint64 *dest_val);
962 GstCaps * gst_pad_peer_query_caps (GstPad * pad, GstCaps *filter);
963 gboolean gst_pad_peer_query_accept_caps (GstPad * pad, GstCaps *caps);
966 void gst_bin_add_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
967 void gst_bin_remove_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
968 GstPad * gst_bin_find_unlinked_pad (GstBin *bin, GstPadDirection direction);
970 /* parse utility functions */
971 GstElement * gst_parse_bin_from_description (const gchar * bin_description,
972 gboolean ghost_unlinked_pads,
975 GstElement * gst_parse_bin_from_description_full (const gchar * bin_description,
976 gboolean ghost_unlinked_pads,
977 GstParseContext * context,
981 GstClockTime gst_util_get_timestamp (void);
985 * @GST_SEARCH_MODE_EXACT : Only search for exact matches.
986 * @GST_SEARCH_MODE_BEFORE: Search for an exact match or the element just before.
987 * @GST_SEARCH_MODE_AFTER : Search for an exact match or the element just after.
989 * The different search modes.
994 GST_SEARCH_MODE_EXACT = 0,
995 GST_SEARCH_MODE_BEFORE,
996 GST_SEARCH_MODE_AFTER
999 gpointer gst_util_array_binary_search (gpointer array, guint num_elements,
1000 gsize element_size, GCompareDataFunc search_func,
1001 GstSearchMode mode, gconstpointer search_data,
1002 gpointer user_data);
1004 /* fraction operations */
1005 gint gst_util_greatest_common_divisor (gint a, gint b);
1006 gint64 gst_util_greatest_common_divisor_int64 (gint64 a, gint64 b);
1008 void gst_util_fraction_to_double (gint src_n, gint src_d, gdouble *dest);
1009 void gst_util_double_to_fraction (gdouble src, gint *dest_n, gint *dest_d);
1011 gboolean gst_util_fraction_multiply (gint a_n, gint a_d, gint b_n, gint b_d,
1012 gint *res_n, gint *res_d);
1013 gboolean gst_util_fraction_add (gint a_n, gint a_d, gint b_n, gint b_d,
1014 gint *res_n, gint *res_d);
1015 gint gst_util_fraction_compare (gint a_n, gint a_d, gint b_n, gint b_d);
1020 #endif /* __GST_UTILS_H__ */