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);
78 void gst_print_pad_caps (GString *buf, gint indent, GstPad *pad);
79 void gst_print_element_args (GString *buf, gint indent, GstElement *element);
84 * @parent_class_cast: the name of the class cast macro for the parent type
85 * @name: name of the function to call
86 * @args: arguments enclosed in '( )'
88 * Just call the parent handler. This assumes that there is a variable
89 * named parent_class that points to the (duh!) parent class. Note that
90 * this macro is not to be used with things that return something, use
91 * the _WITH_DEFAULT version for that
93 #define GST_CALL_PARENT(parent_class_cast, name, args) \
94 ((parent_class_cast(parent_class)->name != NULL) ? \
95 parent_class_cast(parent_class)->name args : (void) 0)
98 * GST_CALL_PARENT_WITH_DEFAULT:
99 * @parent_class_cast: the name of the class cast macro for the parent type
100 * @name: name of the function to call
101 * @args: arguments enclosed in '( )'
102 * @def_return: default result
104 * Same as GST_CALL_PARENT(), but in case there is no implementation, it
105 * evaluates to @def_return.
107 #define GST_CALL_PARENT_WITH_DEFAULT(parent_class_cast, name, args, def_return)\
108 ((parent_class_cast(parent_class)->name != NULL) ? \
109 parent_class_cast(parent_class)->name args : def_return)
111 /* Define PUT and GET functions for unaligned memory */
112 #define _GST_GET(__data, __idx, __size, __shift) \
113 (((guint##__size) (((const guint8 *) (__data))[__idx])) << (__shift))
115 #define _GST_PUT(__data, __idx, __size, __shift, __num) \
116 (((guint8 *) (__data))[__idx] = (((guint##__size) (__num)) >> (__shift)) & 0xff)
118 #if GST_HAVE_UNALIGNED_ACCESS
119 static inline guint16 __gst_fast_read16(const guint8 *v) {
120 return *(const guint16*)(v);
122 static inline guint32 __gst_fast_read32(const guint8 *v) {
123 return *(const guint32*)(v);
125 static inline guint64 __gst_fast_read64(const guint8 *v) {
126 return *(const guint64*)(v);
128 static inline guint16 __gst_fast_read_swap16(const guint8 *v) {
129 return GUINT16_SWAP_LE_BE(*(const guint16*)(v));
131 static inline guint32 __gst_fast_read_swap32(const guint8 *v) {
132 return GUINT32_SWAP_LE_BE(*(const guint32*)(v));
134 static inline guint64 __gst_fast_read_swap64(const guint8 *v) {
135 return GUINT64_SWAP_LE_BE(*(const guint64*)(v));
137 # define _GST_FAST_READ(s, d) __gst_fast_read##s((const guint8 *)(d))
138 # define _GST_FAST_READ_SWAP(s, d) __gst_fast_read_swap##s((const guint8 *)(d))
143 * GST_READ_UINT64_BE:
144 * @data: memory location
146 * Read a 64 bit unsigned integer value in big endian format from the memory buffer.
150 * GST_READ_UINT64_LE:
151 * @data: memory location
153 * Read a 64 bit unsigned integer value in little endian format from the memory buffer.
155 #if GST_HAVE_UNALIGNED_ACCESS
156 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
157 # define GST_READ_UINT64_BE(data) _GST_FAST_READ (64, data)
158 # define GST_READ_UINT64_LE(data) _GST_FAST_READ_SWAP (64, data)
160 # define GST_READ_UINT64_BE(data) _GST_FAST_READ_SWAP (64, data)
161 # define GST_READ_UINT64_LE(data) _GST_FAST_READ (64, data)
164 # define GST_READ_UINT64_BE(data) (_GST_GET (data, 0, 64, 56) | \
165 _GST_GET (data, 1, 64, 48) | \
166 _GST_GET (data, 2, 64, 40) | \
167 _GST_GET (data, 3, 64, 32) | \
168 _GST_GET (data, 4, 64, 24) | \
169 _GST_GET (data, 5, 64, 16) | \
170 _GST_GET (data, 6, 64, 8) | \
171 _GST_GET (data, 7, 64, 0))
173 # define GST_READ_UINT64_LE(data) (_GST_GET (data, 7, 64, 56) | \
174 _GST_GET (data, 6, 64, 48) | \
175 _GST_GET (data, 5, 64, 40) | \
176 _GST_GET (data, 4, 64, 32) | \
177 _GST_GET (data, 3, 64, 24) | \
178 _GST_GET (data, 2, 64, 16) | \
179 _GST_GET (data, 1, 64, 8) | \
180 _GST_GET (data, 0, 64, 0))
184 * GST_READ_UINT32_BE:
185 * @data: memory location
187 * Read a 32 bit unsigned integer value in big endian format from the memory buffer.
191 * GST_READ_UINT32_LE:
192 * @data: memory location
194 * Read a 32 bit unsigned integer value in little endian format from the memory buffer.
196 #if GST_HAVE_UNALIGNED_ACCESS
197 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
198 # define GST_READ_UINT32_BE(data) _GST_FAST_READ (32, data)
199 # define GST_READ_UINT32_LE(data) _GST_FAST_READ_SWAP (32, data)
201 # define GST_READ_UINT32_BE(data) _GST_FAST_READ_SWAP (32, data)
202 # define GST_READ_UINT32_LE(data) _GST_FAST_READ (32, data)
205 # define GST_READ_UINT32_BE(data) (_GST_GET (data, 0, 32, 24) | \
206 _GST_GET (data, 1, 32, 16) | \
207 _GST_GET (data, 2, 32, 8) | \
208 _GST_GET (data, 3, 32, 0))
210 # define GST_READ_UINT32_LE(data) (_GST_GET (data, 3, 32, 24) | \
211 _GST_GET (data, 2, 32, 16) | \
212 _GST_GET (data, 1, 32, 8) | \
213 _GST_GET (data, 0, 32, 0))
217 * GST_READ_UINT24_BE:
218 * @data: memory location
220 * Read a 24 bit unsigned integer value in big endian format from the memory buffer.
224 #define GST_READ_UINT24_BE(data) (_GST_GET (data, 0, 32, 16) | \
225 _GST_GET (data, 1, 32, 8) | \
226 _GST_GET (data, 2, 32, 0))
229 * GST_READ_UINT24_LE:
230 * @data: memory location
232 * Read a 24 bit unsigned integer value in little endian format from the memory buffer.
236 #define GST_READ_UINT24_LE(data) (_GST_GET (data, 2, 32, 16) | \
237 _GST_GET (data, 1, 32, 8) | \
238 _GST_GET (data, 0, 32, 0))
241 * GST_READ_UINT16_BE:
242 * @data: memory location
244 * Read a 16 bit unsigned integer value in big endian format from the memory buffer.
247 * GST_READ_UINT16_LE:
248 * @data: memory location
250 * Read a 16 bit unsigned integer value in little endian format from the memory buffer.
252 #if GST_HAVE_UNALIGNED_ACCESS
253 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
254 # define GST_READ_UINT16_BE(data) _GST_FAST_READ (16, data)
255 # define GST_READ_UINT16_LE(data) _GST_FAST_READ_SWAP (16, data)
257 # define GST_READ_UINT16_BE(data) _GST_FAST_READ_SWAP (16, data)
258 # define GST_READ_UINT16_LE(data) _GST_FAST_READ (16, data)
261 # define GST_READ_UINT16_BE(data) (_GST_GET (data, 0, 16, 8) | \
262 _GST_GET (data, 1, 16, 0))
264 # define GST_READ_UINT16_LE(data) (_GST_GET (data, 1, 16, 8) | \
265 _GST_GET (data, 0, 16, 0))
270 * @data: memory location
272 * Read an 8 bit unsigned integer value from the memory buffer.
274 #define GST_READ_UINT8(data) (_GST_GET (data, 0, 8, 0))
277 * GST_WRITE_UINT64_BE:
278 * @data: memory location
279 * @num: value to store
281 * Store a 64 bit unsigned integer value in big endian format into the memory buffer.
283 #define GST_WRITE_UINT64_BE(data, num) do { \
284 _GST_PUT (data, 0, 64, 56, num); \
285 _GST_PUT (data, 1, 64, 48, num); \
286 _GST_PUT (data, 2, 64, 40, num); \
287 _GST_PUT (data, 3, 64, 32, num); \
288 _GST_PUT (data, 4, 64, 24, num); \
289 _GST_PUT (data, 5, 64, 16, num); \
290 _GST_PUT (data, 6, 64, 8, num); \
291 _GST_PUT (data, 7, 64, 0, num); \
295 * GST_WRITE_UINT64_LE:
296 * @data: memory location
297 * @num: value to store
299 * Store a 64 bit unsigned integer value in little endian format into the memory buffer.
301 #define GST_WRITE_UINT64_LE(data, num) do { \
302 _GST_PUT (data, 0, 64, 0, num); \
303 _GST_PUT (data, 1, 64, 8, num); \
304 _GST_PUT (data, 2, 64, 16, num); \
305 _GST_PUT (data, 3, 64, 24, num); \
306 _GST_PUT (data, 4, 64, 32, num); \
307 _GST_PUT (data, 5, 64, 40, num); \
308 _GST_PUT (data, 6, 64, 48, num); \
309 _GST_PUT (data, 7, 64, 56, num); \
313 * GST_WRITE_UINT32_BE:
314 * @data: memory location
315 * @num: value to store
317 * Store a 32 bit unsigned integer value in big endian format into the memory buffer.
319 #define GST_WRITE_UINT32_BE(data, num) do { \
320 _GST_PUT (data, 0, 32, 24, num); \
321 _GST_PUT (data, 1, 32, 16, num); \
322 _GST_PUT (data, 2, 32, 8, num); \
323 _GST_PUT (data, 3, 32, 0, num); \
327 * GST_WRITE_UINT32_LE:
328 * @data: memory location
329 * @num: value to store
331 * Store a 32 bit unsigned integer value in little endian format into the memory buffer.
333 #define GST_WRITE_UINT32_LE(data, num) do { \
334 _GST_PUT (data, 0, 32, 0, num); \
335 _GST_PUT (data, 1, 32, 8, num); \
336 _GST_PUT (data, 2, 32, 16, num); \
337 _GST_PUT (data, 3, 32, 24, num); \
341 * GST_WRITE_UINT24_BE:
342 * @data: memory location
343 * @num: value to store
345 * Store a 24 bit unsigned integer value in big endian format into the memory buffer.
349 #define GST_WRITE_UINT24_BE(data, num) do { \
350 _GST_PUT (data, 0, 32, 16, num); \
351 _GST_PUT (data, 1, 32, 8, num); \
352 _GST_PUT (data, 2, 32, 0, num); \
356 * GST_WRITE_UINT24_LE:
357 * @data: memory location
358 * @num: value to store
360 * Store a 24 bit unsigned integer value in little endian format into the memory buffer.
364 #define GST_WRITE_UINT24_LE(data, num) do { \
365 _GST_PUT (data, 0, 32, 0, num); \
366 _GST_PUT (data, 1, 32, 8, num); \
367 _GST_PUT (data, 2, 32, 16, num); \
371 * GST_WRITE_UINT16_BE:
372 * @data: memory location
373 * @num: value to store
375 * Store a 16 bit unsigned integer value in big endian format into the memory buffer.
377 #define GST_WRITE_UINT16_BE(data, num) do { \
378 _GST_PUT (data, 0, 16, 8, num); \
379 _GST_PUT (data, 1, 16, 0, num); \
383 * GST_WRITE_UINT16_LE:
384 * @data: memory location
385 * @num: value to store
387 * Store a 16 bit unsigned integer value in little endian format into the memory buffer.
389 #define GST_WRITE_UINT16_LE(data, num) do { \
390 _GST_PUT (data, 0, 16, 0, num); \
391 _GST_PUT (data, 1, 16, 8, num); \
396 * @data: memory location
397 * @num: value to store
399 * Store an 8 bit unsigned integer value into the memory buffer.
401 #define GST_WRITE_UINT8(data, num) do { \
402 _GST_PUT (data, 0, 8, 0, num); \
405 /* Float endianness conversion macros */
407 /* FIXME: Remove this once we depend on a GLib version with this */
408 #ifndef GFLOAT_FROM_LE
413 * Swap byte order of a 32-bit floating point value (float).
415 * Returns: @in byte-swapped.
420 #ifdef _FOOL_GTK_DOC_
421 G_INLINE_FUNC gfloat GFLOAT_SWAP_LE_BE (gfloat in);
425 GFLOAT_SWAP_LE_BE(gfloat in)
434 u.i = GUINT32_SWAP_LE_BE (u.i);
439 * GDOUBLE_SWAP_LE_BE:
442 * Swap byte order of a 64-bit floating point value (double).
444 * Returns: @in byte-swapped.
449 #ifdef _FOOL_GTK_DOC_
450 G_INLINE_FUNC gdouble GDOUBLE_SWAP_LE_BE (gdouble in);
453 inline static gdouble
454 GDOUBLE_SWAP_LE_BE(gdouble in)
463 u.i = GUINT64_SWAP_LE_BE (u.i);
471 * Convert 64-bit floating point value (double) from native byte order into
472 * little endian byte order.
481 * Convert 64-bit floating point value (double) from native byte order into
482 * big endian byte order.
491 * Convert 64-bit floating point value (double) from little endian byte order
492 * into native byte order.
501 * Convert 64-bit floating point value (double) from big endian byte order
502 * into native byte order.
512 * Convert 32-bit floating point value (float) from native byte order into
513 * little endian byte order.
522 * Convert 32-bit floating point value (float) from native byte order into
523 * big endian byte order.
532 * Convert 32-bit floating point value (float) from little endian byte order
533 * into native byte order.
542 * Convert 32-bit floating point value (float) from big endian byte order
543 * into native byte order.
549 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
550 #define GFLOAT_TO_LE(val) ((gfloat) (val))
551 #define GFLOAT_TO_BE(val) (GFLOAT_SWAP_LE_BE (val))
552 #define GDOUBLE_TO_LE(val) ((gdouble) (val))
553 #define GDOUBLE_TO_BE(val) (GDOUBLE_SWAP_LE_BE (val))
555 #elif G_BYTE_ORDER == G_BIG_ENDIAN
556 #define GFLOAT_TO_LE(val) (GFLOAT_SWAP_LE_BE (val))
557 #define GFLOAT_TO_BE(val) ((gfloat) (val))
558 #define GDOUBLE_TO_LE(val) (GDOUBLE_SWAP_LE_BE (val))
559 #define GDOUBLE_TO_BE(val) ((gdouble) (val))
561 #else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
562 #error unknown ENDIAN type
563 #endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
565 #define GFLOAT_FROM_LE(val) (GFLOAT_TO_LE (val))
566 #define GFLOAT_FROM_BE(val) (GFLOAT_TO_BE (val))
567 #define GDOUBLE_FROM_LE(val) (GDOUBLE_TO_LE (val))
568 #define GDOUBLE_FROM_BE(val) (GDOUBLE_TO_BE (val))
570 #endif /* !defined(GFLOAT_FROM_LE) */
574 * @data: memory location
576 * Read a 32 bit float value in little endian format from the memory buffer.
578 * Returns: The floating point value read from @data
583 #ifdef _FOOL_GTK_DOC_
584 G_INLINE_FUNC gfloat GST_READ_FLOAT_LE (const guint8 *data);
588 GST_READ_FLOAT_LE(const guint8 *data)
596 u.i = GST_READ_UINT32_LE (data);
602 * @data: memory location
604 * Read a 32 bit float value in big endian format from the memory buffer.
606 * Returns: The floating point value read from @data
611 #ifdef _FOOL_GTK_DOC_
612 G_INLINE_FUNC gfloat GST_READ_FLOAT_BE (const guint8 *data);
616 GST_READ_FLOAT_BE(const guint8 *data)
624 u.i = GST_READ_UINT32_BE (data);
629 * GST_READ_DOUBLE_LE:
630 * @data: memory location
632 * Read a 64 bit double value in little endian format from the memory buffer.
634 * Returns: The double-precision floating point value read from @data
639 #ifdef _FOOL_GTK_DOC_
640 G_INLINE_FUNC gdouble GST_READ_DOUBLE_LE (const guint8 *data);
643 inline static gdouble
644 GST_READ_DOUBLE_LE(const guint8 *data)
652 u.i = GST_READ_UINT64_LE (data);
657 * GST_READ_DOUBLE_BE:
658 * @data: memory location
660 * Read a 64 bit double value in big endian format from the memory buffer.
662 * Returns: The double-precision floating point value read from @data
667 #ifdef _FOOL_GTK_DOC_
668 G_INLINE_FUNC gdouble GST_READ_DOUBLE_BE (const guint8 *data);
671 inline static gdouble
672 GST_READ_DOUBLE_BE(const guint8 *data)
680 u.i = GST_READ_UINT64_BE (data);
685 * GST_WRITE_FLOAT_LE:
686 * @data: memory location
687 * @num: value to store
689 * Store a 32 bit float value in little endian format into the memory buffer.
694 #ifdef _FOOL_GTK_DOC_
695 G_INLINE_FUNC void GST_WRITE_FLOAT_LE (guint8 *data, gfloat num);
699 GST_WRITE_FLOAT_LE(guint8 *data, gfloat num)
708 GST_WRITE_UINT32_LE (data, u.i);
712 * GST_WRITE_FLOAT_BE:
713 * @data: memory location
714 * @num: value to store
716 * Store a 32 bit float value in big endian format into the memory buffer.
721 #ifdef _FOOL_GTK_DOC_
722 G_INLINE_FUNC void GST_WRITE_FLOAT_BE (guint8 *data, gfloat num);
726 GST_WRITE_FLOAT_BE(guint8 *data, gfloat num)
735 GST_WRITE_UINT32_BE (data, u.i);
739 * GST_WRITE_DOUBLE_LE:
740 * @data: memory location
741 * @num: value to store
743 * Store a 64 bit double value in little endian format into the memory buffer.
748 #ifdef _FOOL_GTK_DOC_
749 G_INLINE_FUNC void GST_WRITE_DOUBLE_LE (guint8 *data, gdouble num);
753 GST_WRITE_DOUBLE_LE(guint8 *data, gdouble num)
762 GST_WRITE_UINT64_LE (data, u.i);
766 * GST_WRITE_DOUBLE_BE:
767 * @data: memory location
768 * @num: value to store
770 * Store a 64 bit double value in big endian format into the memory buffer.
775 #ifdef _FOOL_GTK_DOC_
776 G_INLINE_FUNC void GST_WRITE_DOUBLE_BE (guint8 *data, gdouble num);
780 GST_WRITE_DOUBLE_BE(guint8 *data, gdouble num)
789 GST_WRITE_UINT64_BE (data, u.i);
792 /* Miscellaneous utility macros */
796 * @num: integer value to round up
798 * Rounds an integer value up to the next multiple of 2.
800 #define GST_ROUND_UP_2(num) (((num)+1)&~1)
803 * @num: integer value to round up
805 * Rounds an integer value up to the next multiple of 4.
807 #define GST_ROUND_UP_4(num) (((num)+3)&~3)
810 * @num: integer value to round up
812 * Rounds an integer value up to the next multiple of 8.
814 #define GST_ROUND_UP_8(num) (((num)+7)&~7)
817 * @num: integer value to round up
819 * Rounds an integer value up to the next multiple of 16.
821 #define GST_ROUND_UP_16(num) (((num)+15)&~15)
824 * @num: integer value to round up
826 * Rounds an integer value up to the next multiple of 32.
828 #define GST_ROUND_UP_32(num) (((num)+31)&~31)
831 * @num: integer value to round up
833 * Rounds an integer value up to the next multiple of 64.
835 #define GST_ROUND_UP_64(num) (((num)+63)&~63)
839 * @num: integer value to round down
841 * Rounds an integer value down to the next multiple of 2.
845 #define GST_ROUND_DOWN_2(num) ((num)&(~1))
848 * @num: integer value to round down
850 * Rounds an integer value down to the next multiple of 4.
854 #define GST_ROUND_DOWN_4(num) ((num)&(~3))
857 * @num: integer value to round down
859 * Rounds an integer value down to the next multiple of 8.
863 #define GST_ROUND_DOWN_8(num) ((num)&(~7))
866 * @num: integer value to round down
868 * Rounds an integer value down to the next multiple of 16.
872 #define GST_ROUND_DOWN_16(num) ((num)&(~15))
875 * @num: integer value to round down
877 * Rounds an integer value down to the next multiple of 32.
881 #define GST_ROUND_DOWN_32(num) ((num)&(~31))
884 * @num: integer value to round down
886 * Rounds an integer value down to the next multiple of 64.
890 #define GST_ROUND_DOWN_64(num) ((num)&(~63))
892 void gst_object_default_error (GstObject * source,
893 const GError * error,
894 const gchar * debug);
896 /* element functions */
897 void gst_element_create_all_pads (GstElement *element);
898 GstPad* gst_element_get_compatible_pad (GstElement *element, GstPad *pad,
901 GstPadTemplate* gst_element_get_compatible_pad_template (GstElement *element, GstPadTemplate *compattempl);
903 const gchar* gst_element_state_get_name (GstState state);
904 const gchar * gst_element_state_change_return_get_name (GstStateChangeReturn state_ret);
906 gboolean gst_element_link (GstElement *src, GstElement *dest);
907 gboolean gst_element_link_many (GstElement *element_1,
908 GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
909 gboolean gst_element_link_filtered (GstElement * src,
912 void gst_element_unlink (GstElement *src, GstElement *dest);
913 void gst_element_unlink_many (GstElement *element_1,
914 GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
916 gboolean gst_element_link_pads (GstElement *src, const gchar *srcpadname,
917 GstElement *dest, const gchar *destpadname);
918 gboolean gst_element_link_pads_full (GstElement *src, const gchar *srcpadname,
919 GstElement *dest, const gchar *destpadname,
920 GstPadLinkCheck flags);
921 void gst_element_unlink_pads (GstElement *src, const gchar *srcpadname,
922 GstElement *dest, const gchar *destpadname);
924 gboolean gst_element_link_pads_filtered (GstElement * src, const gchar * srcpadname,
925 GstElement * dest, const gchar * destpadname,
928 gboolean gst_element_seek_simple (GstElement *element,
930 GstSeekFlags seek_flags,
933 /* util elementfactory functions */
934 gboolean gst_element_factory_can_sink_all_caps (GstElementFactory *factory, const GstCaps *caps);
935 gboolean gst_element_factory_can_src_all_caps (GstElementFactory *factory, const GstCaps *caps);
936 gboolean gst_element_factory_can_sink_any_caps (GstElementFactory *factory, const GstCaps *caps);
937 gboolean gst_element_factory_can_src_any_caps (GstElementFactory *factory, const GstCaps *caps);
939 /* util query functions */
940 gboolean gst_element_query_position (GstElement *element, GstFormat format, gint64 *cur);
941 gboolean gst_element_query_duration (GstElement *element, GstFormat format, gint64 *duration);
942 gboolean gst_element_query_convert (GstElement *element, GstFormat src_format, gint64 src_val,
943 GstFormat dest_format, gint64 *dest_val);
946 void gst_pad_use_fixed_caps (GstPad *pad);
947 GstElement* gst_pad_get_parent_element (GstPad *pad);
949 /* util query functions */
950 gboolean gst_pad_proxy_query_accept_caps (GstPad *pad, GstQuery *query);
951 gboolean gst_pad_proxy_query_caps (GstPad *pad, GstQuery *query);
953 gboolean gst_pad_query_position (GstPad *pad, GstFormat format, gint64 *cur);
954 gboolean gst_pad_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
955 gboolean gst_pad_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
956 GstFormat dest_format, gint64 *dest_val);
957 GstCaps * gst_pad_query_caps (GstPad *pad, GstCaps *filter);
958 gboolean gst_pad_query_accept_caps (GstPad *pad, GstCaps *caps);
961 gboolean gst_pad_peer_query_position (GstPad *pad, GstFormat format, gint64 *cur);
962 gboolean gst_pad_peer_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
963 gboolean gst_pad_peer_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
964 GstFormat dest_format, gint64 *dest_val);
965 GstCaps * gst_pad_peer_query_caps (GstPad * pad, GstCaps *filter);
966 gboolean gst_pad_peer_query_accept_caps (GstPad * pad, GstCaps *caps);
969 void gst_bin_add_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
970 void gst_bin_remove_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
971 GstPad * gst_bin_find_unlinked_pad (GstBin *bin, GstPadDirection direction);
973 /* parse utility functions */
974 GstElement * gst_parse_bin_from_description (const gchar * bin_description,
975 gboolean ghost_unlinked_pads,
978 GstElement * gst_parse_bin_from_description_full (const gchar * bin_description,
979 gboolean ghost_unlinked_pads,
980 GstParseContext * context,
984 GstClockTime gst_util_get_timestamp (void);
988 * @GST_SEARCH_MODE_EXACT : Only search for exact matches.
989 * @GST_SEARCH_MODE_BEFORE: Search for an exact match or the element just before.
990 * @GST_SEARCH_MODE_AFTER : Search for an exact match or the element just after.
992 * The different search modes.
997 GST_SEARCH_MODE_EXACT = 0,
998 GST_SEARCH_MODE_BEFORE,
999 GST_SEARCH_MODE_AFTER
1002 gpointer gst_util_array_binary_search (gpointer array, guint num_elements,
1003 gsize element_size, GCompareDataFunc search_func,
1004 GstSearchMode mode, gconstpointer search_data,
1005 gpointer user_data);
1007 /* fraction operations */
1008 gint gst_util_greatest_common_divisor (gint a, gint b);
1009 gint64 gst_util_greatest_common_divisor_int64 (gint64 a, gint64 b);
1011 void gst_util_fraction_to_double (gint src_n, gint src_d, gdouble *dest);
1012 void gst_util_double_to_fraction (gdouble src, gint *dest_n, gint *dest_d);
1014 gboolean gst_util_fraction_multiply (gint a_n, gint a_d, gint b_n, gint b_d,
1015 gint *res_n, gint *res_d);
1016 gboolean gst_util_fraction_add (gint a_n, gint a_d, gint b_n, gint b_d,
1017 gint *res_n, gint *res_d);
1018 gint gst_util_fraction_compare (gint a_n, gint a_d, gint b_n, gint b_d);
1023 #endif /* __GST_UTILS_H__ */