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., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, 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.
219 #define GST_READ_UINT24_BE(data) (_GST_GET (data, 0, 32, 16) | \
220 _GST_GET (data, 1, 32, 8) | \
221 _GST_GET (data, 2, 32, 0))
224 * GST_READ_UINT24_LE:
225 * @data: memory location
227 * Read a 24 bit unsigned integer value in little endian format from the memory buffer.
229 #define GST_READ_UINT24_LE(data) (_GST_GET (data, 2, 32, 16) | \
230 _GST_GET (data, 1, 32, 8) | \
231 _GST_GET (data, 0, 32, 0))
234 * GST_READ_UINT16_BE:
235 * @data: memory location
237 * Read a 16 bit unsigned integer value in big endian format from the memory buffer.
240 * GST_READ_UINT16_LE:
241 * @data: memory location
243 * Read a 16 bit unsigned integer value in little endian format from the memory buffer.
245 #if GST_HAVE_UNALIGNED_ACCESS
246 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
247 # define GST_READ_UINT16_BE(data) _GST_FAST_READ (16, data)
248 # define GST_READ_UINT16_LE(data) _GST_FAST_READ_SWAP (16, data)
250 # define GST_READ_UINT16_BE(data) _GST_FAST_READ_SWAP (16, data)
251 # define GST_READ_UINT16_LE(data) _GST_FAST_READ (16, data)
254 # define GST_READ_UINT16_BE(data) (_GST_GET (data, 0, 16, 8) | \
255 _GST_GET (data, 1, 16, 0))
257 # define GST_READ_UINT16_LE(data) (_GST_GET (data, 1, 16, 8) | \
258 _GST_GET (data, 0, 16, 0))
263 * @data: memory location
265 * Read an 8 bit unsigned integer value from the memory buffer.
267 #define GST_READ_UINT8(data) (_GST_GET (data, 0, 8, 0))
270 * GST_WRITE_UINT64_BE:
271 * @data: memory location
272 * @num: value to store
274 * Store a 64 bit unsigned integer value in big endian format into the memory buffer.
276 #define GST_WRITE_UINT64_BE(data, num) do { \
277 _GST_PUT (data, 0, 64, 56, num); \
278 _GST_PUT (data, 1, 64, 48, num); \
279 _GST_PUT (data, 2, 64, 40, num); \
280 _GST_PUT (data, 3, 64, 32, num); \
281 _GST_PUT (data, 4, 64, 24, num); \
282 _GST_PUT (data, 5, 64, 16, num); \
283 _GST_PUT (data, 6, 64, 8, num); \
284 _GST_PUT (data, 7, 64, 0, num); \
288 * GST_WRITE_UINT64_LE:
289 * @data: memory location
290 * @num: value to store
292 * Store a 64 bit unsigned integer value in little endian format into the memory buffer.
294 #define GST_WRITE_UINT64_LE(data, num) do { \
295 _GST_PUT (data, 0, 64, 0, num); \
296 _GST_PUT (data, 1, 64, 8, num); \
297 _GST_PUT (data, 2, 64, 16, num); \
298 _GST_PUT (data, 3, 64, 24, num); \
299 _GST_PUT (data, 4, 64, 32, num); \
300 _GST_PUT (data, 5, 64, 40, num); \
301 _GST_PUT (data, 6, 64, 48, num); \
302 _GST_PUT (data, 7, 64, 56, num); \
306 * GST_WRITE_UINT32_BE:
307 * @data: memory location
308 * @num: value to store
310 * Store a 32 bit unsigned integer value in big endian format into the memory buffer.
312 #define GST_WRITE_UINT32_BE(data, num) do { \
313 _GST_PUT (data, 0, 32, 24, num); \
314 _GST_PUT (data, 1, 32, 16, num); \
315 _GST_PUT (data, 2, 32, 8, num); \
316 _GST_PUT (data, 3, 32, 0, num); \
320 * GST_WRITE_UINT32_LE:
321 * @data: memory location
322 * @num: value to store
324 * Store a 32 bit unsigned integer value in little endian format into the memory buffer.
326 #define GST_WRITE_UINT32_LE(data, num) do { \
327 _GST_PUT (data, 0, 32, 0, num); \
328 _GST_PUT (data, 1, 32, 8, num); \
329 _GST_PUT (data, 2, 32, 16, num); \
330 _GST_PUT (data, 3, 32, 24, num); \
334 * GST_WRITE_UINT24_BE:
335 * @data: memory location
336 * @num: value to store
338 * Store a 24 bit unsigned integer value in big endian format into the memory buffer.
340 #define GST_WRITE_UINT24_BE(data, num) do { \
341 _GST_PUT (data, 0, 32, 16, num); \
342 _GST_PUT (data, 1, 32, 8, num); \
343 _GST_PUT (data, 2, 32, 0, num); \
347 * GST_WRITE_UINT24_LE:
348 * @data: memory location
349 * @num: value to store
351 * Store a 24 bit unsigned integer value in little endian format into the memory buffer.
353 #define GST_WRITE_UINT24_LE(data, num) do { \
354 _GST_PUT (data, 0, 32, 0, num); \
355 _GST_PUT (data, 1, 32, 8, num); \
356 _GST_PUT (data, 2, 32, 16, num); \
360 * GST_WRITE_UINT16_BE:
361 * @data: memory location
362 * @num: value to store
364 * Store a 16 bit unsigned integer value in big endian format into the memory buffer.
366 #define GST_WRITE_UINT16_BE(data, num) do { \
367 _GST_PUT (data, 0, 16, 8, num); \
368 _GST_PUT (data, 1, 16, 0, num); \
372 * GST_WRITE_UINT16_LE:
373 * @data: memory location
374 * @num: value to store
376 * Store a 16 bit unsigned integer value in little endian format into the memory buffer.
378 #define GST_WRITE_UINT16_LE(data, num) do { \
379 _GST_PUT (data, 0, 16, 0, num); \
380 _GST_PUT (data, 1, 16, 8, num); \
385 * @data: memory location
386 * @num: value to store
388 * Store an 8 bit unsigned integer value into the memory buffer.
390 #define GST_WRITE_UINT8(data, num) do { \
391 _GST_PUT (data, 0, 8, 0, num); \
394 /* Float endianness conversion macros */
396 /* FIXME: Remove this once we depend on a GLib version with this */
397 #ifndef GFLOAT_FROM_LE
402 * Swap byte order of a 32-bit floating point value (float).
404 * Returns: @in byte-swapped.
406 #ifdef _FOOL_GTK_DOC_
407 G_INLINE_FUNC gfloat GFLOAT_SWAP_LE_BE (gfloat in);
411 GFLOAT_SWAP_LE_BE(gfloat in)
420 u.i = GUINT32_SWAP_LE_BE (u.i);
425 * GDOUBLE_SWAP_LE_BE:
428 * Swap byte order of a 64-bit floating point value (double).
430 * Returns: @in byte-swapped.
432 #ifdef _FOOL_GTK_DOC_
433 G_INLINE_FUNC gdouble GDOUBLE_SWAP_LE_BE (gdouble in);
436 inline static gdouble
437 GDOUBLE_SWAP_LE_BE(gdouble in)
446 u.i = GUINT64_SWAP_LE_BE (u.i);
454 * Convert 64-bit floating point value (double) from native byte order into
455 * little endian byte order.
461 * Convert 64-bit floating point value (double) from native byte order into
462 * big endian byte order.
468 * Convert 64-bit floating point value (double) from little endian byte order
469 * into native byte order.
475 * Convert 64-bit floating point value (double) from big endian byte order
476 * into native byte order.
483 * Convert 32-bit floating point value (float) from native byte order into
484 * little endian byte order.
490 * Convert 32-bit floating point value (float) from native byte order into
491 * big endian byte order.
497 * Convert 32-bit floating point value (float) from little endian byte order
498 * into native byte order.
504 * Convert 32-bit floating point value (float) from big endian byte order
505 * into native byte order.
508 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
509 #define GFLOAT_TO_LE(val) ((gfloat) (val))
510 #define GFLOAT_TO_BE(val) (GFLOAT_SWAP_LE_BE (val))
511 #define GDOUBLE_TO_LE(val) ((gdouble) (val))
512 #define GDOUBLE_TO_BE(val) (GDOUBLE_SWAP_LE_BE (val))
514 #elif G_BYTE_ORDER == G_BIG_ENDIAN
515 #define GFLOAT_TO_LE(val) (GFLOAT_SWAP_LE_BE (val))
516 #define GFLOAT_TO_BE(val) ((gfloat) (val))
517 #define GDOUBLE_TO_LE(val) (GDOUBLE_SWAP_LE_BE (val))
518 #define GDOUBLE_TO_BE(val) ((gdouble) (val))
520 #else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
521 #error unknown ENDIAN type
522 #endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
524 #define GFLOAT_FROM_LE(val) (GFLOAT_TO_LE (val))
525 #define GFLOAT_FROM_BE(val) (GFLOAT_TO_BE (val))
526 #define GDOUBLE_FROM_LE(val) (GDOUBLE_TO_LE (val))
527 #define GDOUBLE_FROM_BE(val) (GDOUBLE_TO_BE (val))
529 #endif /* !defined(GFLOAT_FROM_LE) */
533 * @data: memory location
535 * Read a 32 bit float value in little endian format from the memory buffer.
537 * Returns: The floating point value read from @data
539 #ifdef _FOOL_GTK_DOC_
540 G_INLINE_FUNC gfloat GST_READ_FLOAT_LE (const guint8 *data);
544 GST_READ_FLOAT_LE(const guint8 *data)
552 u.i = GST_READ_UINT32_LE (data);
558 * @data: memory location
560 * Read a 32 bit float value in big endian format from the memory buffer.
562 * Returns: The floating point value read from @data
564 #ifdef _FOOL_GTK_DOC_
565 G_INLINE_FUNC gfloat GST_READ_FLOAT_BE (const guint8 *data);
569 GST_READ_FLOAT_BE(const guint8 *data)
577 u.i = GST_READ_UINT32_BE (data);
582 * GST_READ_DOUBLE_LE:
583 * @data: memory location
585 * Read a 64 bit double value in little endian format from the memory buffer.
587 * Returns: The double-precision floating point value read from @data
589 #ifdef _FOOL_GTK_DOC_
590 G_INLINE_FUNC gdouble GST_READ_DOUBLE_LE (const guint8 *data);
593 inline static gdouble
594 GST_READ_DOUBLE_LE(const guint8 *data)
602 u.i = GST_READ_UINT64_LE (data);
607 * GST_READ_DOUBLE_BE:
608 * @data: memory location
610 * Read a 64 bit double value in big endian format from the memory buffer.
612 * Returns: The double-precision floating point value read from @data
614 #ifdef _FOOL_GTK_DOC_
615 G_INLINE_FUNC gdouble GST_READ_DOUBLE_BE (const guint8 *data);
618 inline static gdouble
619 GST_READ_DOUBLE_BE(const guint8 *data)
627 u.i = GST_READ_UINT64_BE (data);
632 * GST_WRITE_FLOAT_LE:
633 * @data: memory location
634 * @num: value to store
636 * Store a 32 bit float value in little endian format into the memory buffer.
638 #ifdef _FOOL_GTK_DOC_
639 G_INLINE_FUNC void GST_WRITE_FLOAT_LE (guint8 *data, gfloat num);
643 GST_WRITE_FLOAT_LE(guint8 *data, gfloat num)
652 GST_WRITE_UINT32_LE (data, u.i);
656 * GST_WRITE_FLOAT_BE:
657 * @data: memory location
658 * @num: value to store
660 * Store a 32 bit float value in big endian format into the memory buffer.
662 #ifdef _FOOL_GTK_DOC_
663 G_INLINE_FUNC void GST_WRITE_FLOAT_BE (guint8 *data, gfloat num);
667 GST_WRITE_FLOAT_BE(guint8 *data, gfloat num)
676 GST_WRITE_UINT32_BE (data, u.i);
680 * GST_WRITE_DOUBLE_LE:
681 * @data: memory location
682 * @num: value to store
684 * Store a 64 bit double value in little endian format into the memory buffer.
686 #ifdef _FOOL_GTK_DOC_
687 G_INLINE_FUNC void GST_WRITE_DOUBLE_LE (guint8 *data, gdouble num);
691 GST_WRITE_DOUBLE_LE(guint8 *data, gdouble num)
700 GST_WRITE_UINT64_LE (data, u.i);
704 * GST_WRITE_DOUBLE_BE:
705 * @data: memory location
706 * @num: value to store
708 * Store a 64 bit double value in big endian format into the memory buffer.
710 #ifdef _FOOL_GTK_DOC_
711 G_INLINE_FUNC void GST_WRITE_DOUBLE_BE (guint8 *data, gdouble num);
715 GST_WRITE_DOUBLE_BE(guint8 *data, gdouble num)
724 GST_WRITE_UINT64_BE (data, u.i);
727 /* Miscellaneous utility macros */
731 * @num: integer value to round up
733 * Rounds an integer value up to the next multiple of 2.
735 #define GST_ROUND_UP_2(num) (((num)+1)&~1)
738 * @num: integer value to round up
740 * Rounds an integer value up to the next multiple of 4.
742 #define GST_ROUND_UP_4(num) (((num)+3)&~3)
745 * @num: integer value to round up
747 * Rounds an integer value up to the next multiple of 8.
749 #define GST_ROUND_UP_8(num) (((num)+7)&~7)
752 * @num: integer value to round up
754 * Rounds an integer value up to the next multiple of 16.
756 #define GST_ROUND_UP_16(num) (((num)+15)&~15)
759 * @num: integer value to round up
761 * Rounds an integer value up to the next multiple of 32.
763 #define GST_ROUND_UP_32(num) (((num)+31)&~31)
766 * @num: integer value to round up
768 * Rounds an integer value up to the next multiple of 64.
770 #define GST_ROUND_UP_64(num) (((num)+63)&~63)
774 * @num: integer value to round down
776 * Rounds an integer value down to the next multiple of 2.
778 #define GST_ROUND_DOWN_2(num) ((num)&(~1))
781 * @num: integer value to round down
783 * Rounds an integer value down to the next multiple of 4.
785 #define GST_ROUND_DOWN_4(num) ((num)&(~3))
788 * @num: integer value to round down
790 * Rounds an integer value down to the next multiple of 8.
792 #define GST_ROUND_DOWN_8(num) ((num)&(~7))
795 * @num: integer value to round down
797 * Rounds an integer value down to the next multiple of 16.
799 #define GST_ROUND_DOWN_16(num) ((num)&(~15))
802 * @num: integer value to round down
804 * Rounds an integer value down to the next multiple of 32.
806 #define GST_ROUND_DOWN_32(num) ((num)&(~31))
809 * @num: integer value to round down
811 * Rounds an integer value down to the next multiple of 64.
813 #define GST_ROUND_DOWN_64(num) ((num)&(~63))
815 void gst_object_default_error (GstObject * source,
816 const GError * error,
817 const gchar * debug);
819 /* element functions */
820 void gst_element_create_all_pads (GstElement *element);
821 GstPad* gst_element_get_compatible_pad (GstElement *element, GstPad *pad,
824 GstPadTemplate* gst_element_get_compatible_pad_template (GstElement *element, GstPadTemplate *compattempl);
826 const gchar* gst_element_state_get_name (GstState state);
827 const gchar * gst_element_state_change_return_get_name (GstStateChangeReturn state_ret);
829 gboolean gst_element_link (GstElement *src, GstElement *dest);
830 gboolean gst_element_link_many (GstElement *element_1,
831 GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
832 gboolean gst_element_link_filtered (GstElement * src,
835 void gst_element_unlink (GstElement *src, GstElement *dest);
836 void gst_element_unlink_many (GstElement *element_1,
837 GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
839 gboolean gst_element_link_pads (GstElement *src, const gchar *srcpadname,
840 GstElement *dest, const gchar *destpadname);
841 gboolean gst_element_link_pads_full (GstElement *src, const gchar *srcpadname,
842 GstElement *dest, const gchar *destpadname,
843 GstPadLinkCheck flags);
844 void gst_element_unlink_pads (GstElement *src, const gchar *srcpadname,
845 GstElement *dest, const gchar *destpadname);
847 gboolean gst_element_link_pads_filtered (GstElement * src, const gchar * srcpadname,
848 GstElement * dest, const gchar * destpadname,
851 gboolean gst_element_seek_simple (GstElement *element,
853 GstSeekFlags seek_flags,
856 /* util elementfactory functions */
857 gboolean gst_element_factory_can_sink_all_caps (GstElementFactory *factory, const GstCaps *caps);
858 gboolean gst_element_factory_can_src_all_caps (GstElementFactory *factory, const GstCaps *caps);
859 gboolean gst_element_factory_can_sink_any_caps (GstElementFactory *factory, const GstCaps *caps);
860 gboolean gst_element_factory_can_src_any_caps (GstElementFactory *factory, const GstCaps *caps);
862 /* util query functions */
863 gboolean gst_element_query_position (GstElement *element, GstFormat format, gint64 *cur);
864 gboolean gst_element_query_duration (GstElement *element, GstFormat format, gint64 *duration);
865 gboolean gst_element_query_convert (GstElement *element, GstFormat src_format, gint64 src_val,
866 GstFormat dest_format, gint64 *dest_val);
869 void gst_pad_use_fixed_caps (GstPad *pad);
870 GstElement* gst_pad_get_parent_element (GstPad *pad);
872 /* util query functions */
873 gboolean gst_pad_proxy_query_accept_caps (GstPad *pad, GstQuery *query);
874 gboolean gst_pad_proxy_query_caps (GstPad *pad, GstQuery *query);
876 gboolean gst_pad_query_position (GstPad *pad, GstFormat format, gint64 *cur);
877 gboolean gst_pad_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
878 gboolean gst_pad_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
879 GstFormat dest_format, gint64 *dest_val);
880 GstCaps * gst_pad_query_caps (GstPad *pad, GstCaps *filter);
881 gboolean gst_pad_query_accept_caps (GstPad *pad, GstCaps *caps);
884 gboolean gst_pad_peer_query_position (GstPad *pad, GstFormat format, gint64 *cur);
885 gboolean gst_pad_peer_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
886 gboolean gst_pad_peer_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
887 GstFormat dest_format, gint64 *dest_val);
888 GstCaps * gst_pad_peer_query_caps (GstPad * pad, GstCaps *filter);
889 gboolean gst_pad_peer_query_accept_caps (GstPad * pad, GstCaps *caps);
891 gchar * gst_pad_create_stream_id (GstPad * pad, GstElement * parent, const gchar *stream_id);
892 gchar * gst_pad_create_stream_id_printf (GstPad * pad, GstElement * parent, const gchar *stream_id, ...);
893 gchar * gst_pad_create_stream_id_printf_valist (GstPad * pad, GstElement * parent, const gchar *stream_id, va_list var_args);
895 gchar * gst_pad_get_stream_id (GstPad * pad);
898 void gst_bin_add_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
899 void gst_bin_remove_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
900 GstPad * gst_bin_find_unlinked_pad (GstBin *bin, GstPadDirection direction);
902 /* parse utility functions */
903 GstElement * gst_parse_bin_from_description (const gchar * bin_description,
904 gboolean ghost_unlinked_pads,
907 GstElement * gst_parse_bin_from_description_full (const gchar * bin_description,
908 gboolean ghost_unlinked_pads,
909 GstParseContext * context,
913 GstClockTime gst_util_get_timestamp (void);
917 * @GST_SEARCH_MODE_EXACT : Only search for exact matches.
918 * @GST_SEARCH_MODE_BEFORE: Search for an exact match or the element just before.
919 * @GST_SEARCH_MODE_AFTER : Search for an exact match or the element just after.
921 * The different search modes.
924 GST_SEARCH_MODE_EXACT = 0,
925 GST_SEARCH_MODE_BEFORE,
926 GST_SEARCH_MODE_AFTER
929 gpointer gst_util_array_binary_search (gpointer array, guint num_elements,
930 gsize element_size, GCompareDataFunc search_func,
931 GstSearchMode mode, gconstpointer search_data,
934 /* fraction operations */
935 gint gst_util_greatest_common_divisor (gint a, gint b);
936 gint64 gst_util_greatest_common_divisor_int64 (gint64 a, gint64 b);
938 void gst_util_fraction_to_double (gint src_n, gint src_d, gdouble *dest);
939 void gst_util_double_to_fraction (gdouble src, gint *dest_n, gint *dest_d);
941 gboolean gst_util_fraction_multiply (gint a_n, gint a_d, gint b_n, gint b_d,
942 gint *res_n, gint *res_d);
943 gboolean gst_util_fraction_add (gint a_n, gint a_d, gint b_n, gint b_d,
944 gint *res_n, gint *res_d);
945 gint gst_util_fraction_compare (gint a_n, gint a_d, gint b_n, gint b_d);
950 #endif /* __GST_UTILS_H__ */