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);
78 guint gst_util_group_id_next (void);
82 * @parent_class_cast: the name of the class cast macro for the parent type
83 * @name: name of the function to call
84 * @args: arguments enclosed in '( )'
86 * Just call the parent handler. This assumes that there is a variable
87 * named parent_class that points to the (duh!) parent class. Note that
88 * this macro is not to be used with things that return something, use
89 * the _WITH_DEFAULT version for that
91 #define GST_CALL_PARENT(parent_class_cast, name, args) \
92 ((parent_class_cast(parent_class)->name != NULL) ? \
93 parent_class_cast(parent_class)->name args : (void) 0)
96 * GST_CALL_PARENT_WITH_DEFAULT:
97 * @parent_class_cast: the name of the class cast macro for the parent type
98 * @name: name of the function to call
99 * @args: arguments enclosed in '( )'
100 * @def_return: default result
102 * Same as GST_CALL_PARENT(), but in case there is no implementation, it
103 * evaluates to @def_return.
105 #define GST_CALL_PARENT_WITH_DEFAULT(parent_class_cast, name, args, def_return)\
106 ((parent_class_cast(parent_class)->name != NULL) ? \
107 parent_class_cast(parent_class)->name args : def_return)
109 /* Define PUT and GET functions for unaligned memory */
110 #define _GST_GET(__data, __idx, __size, __shift) \
111 (((guint##__size) (((const guint8 *) (__data))[__idx])) << (__shift))
113 #define _GST_PUT(__data, __idx, __size, __shift, __num) \
114 (((guint8 *) (__data))[__idx] = (((guint##__size) (__num)) >> (__shift)) & 0xff)
116 #ifndef __GTK_DOC_IGNORE__
117 #if GST_HAVE_UNALIGNED_ACCESS
118 static inline guint16 __gst_fast_read16(const guint8 *v) {
119 return *(const guint16*)(const void*)(v);
121 static inline guint32 __gst_fast_read32(const guint8 *v) {
122 return *(const guint32*)(const void*)(v);
124 static inline guint64 __gst_fast_read64(const guint8 *v) {
125 return *(const guint64*)(const void*)(v);
127 static inline guint16 __gst_fast_read_swap16(const guint8 *v) {
128 return GUINT16_SWAP_LE_BE(*(const guint16*)(const void*)(v));
130 static inline guint32 __gst_fast_read_swap32(const guint8 *v) {
131 return GUINT32_SWAP_LE_BE(*(const guint32*)(const void*)(v));
133 static inline guint64 __gst_fast_read_swap64(const guint8 *v) {
134 return GUINT64_SWAP_LE_BE(*(const guint64*)(const void*)(v));
136 # define _GST_FAST_READ(s, d) __gst_fast_read##s((const guint8 *)(d))
137 # define _GST_FAST_READ_SWAP(s, d) __gst_fast_read_swap##s((const guint8 *)(d))
139 static inline void __gst_fast_write16 (guint8 *p, guint16 v) {
140 *(guint16*)(void*)(p) = v;
142 static inline void __gst_fast_write32 (guint8 *p, guint32 v) {
143 *(guint32*)(void*)(p) = v;
145 static inline void __gst_fast_write64 (guint8 *p, guint64 v) {
146 *(guint64*)(void*)(p) = v;
148 static inline void __gst_fast_write_swap16 (guint8 *p, guint16 v) {
149 *(guint16*)(void*)(p) = GUINT16_SWAP_LE_BE (v);
151 static inline void __gst_fast_write_swap32 (guint8 *p, guint32 v) {
152 *(guint32*)(void*)(p) = GUINT32_SWAP_LE_BE (v);
154 static inline void __gst_fast_write_swap64 (guint8 *p, guint64 v) {
155 *(guint64*)(void*)(p) = GUINT64_SWAP_LE_BE (v);
157 # define _GST_FAST_WRITE(s, d, v) __gst_fast_write##s((guint8 *)(d), (v))
158 # define _GST_FAST_WRITE_SWAP(s, d, v) __gst_fast_write_swap##s((guint8 *)(d), (v))
164 * GST_READ_UINT64_BE:
165 * @data: memory location
167 * Read a 64 bit unsigned integer value in big endian format from the memory buffer.
171 * GST_READ_UINT64_LE:
172 * @data: memory location
174 * Read a 64 bit unsigned integer value in little endian format from the memory buffer.
176 #if GST_HAVE_UNALIGNED_ACCESS
177 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
178 # define GST_READ_UINT64_BE(data) _GST_FAST_READ (64, data)
179 # define GST_READ_UINT64_LE(data) _GST_FAST_READ_SWAP (64, data)
181 # define GST_READ_UINT64_BE(data) _GST_FAST_READ_SWAP (64, data)
182 # define GST_READ_UINT64_LE(data) _GST_FAST_READ (64, data)
185 #define _GST_READ_UINT64_BE(data) (_GST_GET (data, 0, 64, 56) | \
186 _GST_GET (data, 1, 64, 48) | \
187 _GST_GET (data, 2, 64, 40) | \
188 _GST_GET (data, 3, 64, 32) | \
189 _GST_GET (data, 4, 64, 24) | \
190 _GST_GET (data, 5, 64, 16) | \
191 _GST_GET (data, 6, 64, 8) | \
192 _GST_GET (data, 7, 64, 0))
194 #define _GST_READ_UINT64_LE(data) (_GST_GET (data, 7, 64, 56) | \
195 _GST_GET (data, 6, 64, 48) | \
196 _GST_GET (data, 5, 64, 40) | \
197 _GST_GET (data, 4, 64, 32) | \
198 _GST_GET (data, 3, 64, 24) | \
199 _GST_GET (data, 2, 64, 16) | \
200 _GST_GET (data, 1, 64, 8) | \
201 _GST_GET (data, 0, 64, 0))
203 #define GST_READ_UINT64_BE(data) __gst_slow_read64_be((const guint8 *)(data))
204 static inline guint64 __gst_slow_read64_be (const guint8 * data) {
205 return _GST_READ_UINT64_BE (data);
207 #define GST_READ_UINT64_LE(data) __gst_slow_read64_le((const guint8 *)(data))
208 static inline guint64 __gst_slow_read64_le (const guint8 * data) {
209 return _GST_READ_UINT64_LE (data);
214 * GST_READ_UINT32_BE:
215 * @data: memory location
217 * Read a 32 bit unsigned integer value in big endian format from the memory buffer.
221 * GST_READ_UINT32_LE:
222 * @data: memory location
224 * Read a 32 bit unsigned integer value in little endian format from the memory buffer.
226 #if GST_HAVE_UNALIGNED_ACCESS
227 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
228 # define GST_READ_UINT32_BE(data) _GST_FAST_READ (32, data)
229 # define GST_READ_UINT32_LE(data) _GST_FAST_READ_SWAP (32, data)
231 # define GST_READ_UINT32_BE(data) _GST_FAST_READ_SWAP (32, data)
232 # define GST_READ_UINT32_LE(data) _GST_FAST_READ (32, data)
235 #define _GST_READ_UINT32_BE(data) (_GST_GET (data, 0, 32, 24) | \
236 _GST_GET (data, 1, 32, 16) | \
237 _GST_GET (data, 2, 32, 8) | \
238 _GST_GET (data, 3, 32, 0))
240 #define _GST_READ_UINT32_LE(data) (_GST_GET (data, 3, 32, 24) | \
241 _GST_GET (data, 2, 32, 16) | \
242 _GST_GET (data, 1, 32, 8) | \
243 _GST_GET (data, 0, 32, 0))
245 #define GST_READ_UINT32_BE(data) __gst_slow_read32_be((const guint8 *)(data))
246 static inline guint32 __gst_slow_read32_be (const guint8 * data) {
247 return _GST_READ_UINT32_BE (data);
249 #define GST_READ_UINT32_LE(data) __gst_slow_read32_le((const guint8 *)(data))
250 static inline guint32 __gst_slow_read32_le (const guint8 * data) {
251 return _GST_READ_UINT32_LE (data);
256 * GST_READ_UINT24_BE:
257 * @data: memory location
259 * Read a 24 bit unsigned integer value in big endian format from the memory buffer.
261 #define _GST_READ_UINT24_BE(data) (_GST_GET (data, 0, 32, 16) | \
262 _GST_GET (data, 1, 32, 8) | \
263 _GST_GET (data, 2, 32, 0))
265 #define GST_READ_UINT24_BE(data) __gst_slow_read24_be((const guint8 *)(data))
266 static inline guint32 __gst_slow_read24_be (const guint8 * data) {
267 return _GST_READ_UINT24_BE (data);
271 * GST_READ_UINT24_LE:
272 * @data: memory location
274 * Read a 24 bit unsigned integer value in little endian format from the memory buffer.
276 #define _GST_READ_UINT24_LE(data) (_GST_GET (data, 2, 32, 16) | \
277 _GST_GET (data, 1, 32, 8) | \
278 _GST_GET (data, 0, 32, 0))
280 #define GST_READ_UINT24_LE(data) __gst_slow_read24_le((const guint8 *)(data))
281 static inline guint32 __gst_slow_read24_le (const guint8 * data) {
282 return _GST_READ_UINT24_LE (data);
286 * GST_READ_UINT16_BE:
287 * @data: memory location
289 * Read a 16 bit unsigned integer value in big endian format from the memory buffer.
292 * GST_READ_UINT16_LE:
293 * @data: memory location
295 * Read a 16 bit unsigned integer value in little endian format from the memory buffer.
297 #if GST_HAVE_UNALIGNED_ACCESS
298 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
299 # define GST_READ_UINT16_BE(data) _GST_FAST_READ (16, data)
300 # define GST_READ_UINT16_LE(data) _GST_FAST_READ_SWAP (16, data)
302 # define GST_READ_UINT16_BE(data) _GST_FAST_READ_SWAP (16, data)
303 # define GST_READ_UINT16_LE(data) _GST_FAST_READ (16, data)
306 #define _GST_READ_UINT16_BE(data) (_GST_GET (data, 0, 16, 8) | \
307 _GST_GET (data, 1, 16, 0))
309 #define _GST_READ_UINT16_LE(data) (_GST_GET (data, 1, 16, 8) | \
310 _GST_GET (data, 0, 16, 0))
312 #define GST_READ_UINT16_BE(data) __gst_slow_read16_be((const guint8 *)(data))
313 static inline guint16 __gst_slow_read16_be (const guint8 * data) {
314 return _GST_READ_UINT16_BE (data);
316 #define GST_READ_UINT16_LE(data) __gst_slow_read16_le((const guint8 *)(data))
317 static inline guint16 __gst_slow_read16_le (const guint8 * data) {
318 return _GST_READ_UINT16_LE (data);
324 * @data: memory location
326 * Read an 8 bit unsigned integer value from the memory buffer.
328 #define GST_READ_UINT8(data) (_GST_GET (data, 0, 8, 0))
331 * GST_WRITE_UINT64_BE:
332 * @data: memory location
333 * @num: value to store
335 * Store a 64 bit unsigned integer value in big endian format into the memory buffer.
338 * GST_WRITE_UINT64_LE:
339 * @data: memory location
340 * @num: value to store
342 * Store a 64 bit unsigned integer value in little endian format into the memory buffer.
344 #if GST_HAVE_UNALIGNED_ACCESS
345 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
346 # define GST_WRITE_UINT64_BE(data,val) _GST_FAST_WRITE(64,data,val)
347 # define GST_WRITE_UINT64_LE(data,val) _GST_FAST_WRITE_SWAP(64,data,val)
349 # define GST_WRITE_UINT64_BE(data,val) _GST_FAST_WRITE_SWAP(64,data,val)
350 # define GST_WRITE_UINT64_LE(data,val) _GST_FAST_WRITE(64,data,val)
353 #define GST_WRITE_UINT64_BE(data, num) do { \
354 gpointer __put_data = data; \
355 _GST_PUT (__put_data, 0, 64, 56, num); \
356 _GST_PUT (__put_data, 1, 64, 48, num); \
357 _GST_PUT (__put_data, 2, 64, 40, num); \
358 _GST_PUT (__put_data, 3, 64, 32, num); \
359 _GST_PUT (__put_data, 4, 64, 24, num); \
360 _GST_PUT (__put_data, 5, 64, 16, num); \
361 _GST_PUT (__put_data, 6, 64, 8, num); \
362 _GST_PUT (__put_data, 7, 64, 0, num); \
365 #define GST_WRITE_UINT64_LE(data, num) do { \
366 gpointer __put_data = data; \
367 _GST_PUT (__put_data, 0, 64, 0, num); \
368 _GST_PUT (__put_data, 1, 64, 8, num); \
369 _GST_PUT (__put_data, 2, 64, 16, num); \
370 _GST_PUT (__put_data, 3, 64, 24, num); \
371 _GST_PUT (__put_data, 4, 64, 32, num); \
372 _GST_PUT (__put_data, 5, 64, 40, num); \
373 _GST_PUT (__put_data, 6, 64, 48, num); \
374 _GST_PUT (__put_data, 7, 64, 56, num); \
376 #endif /* !GST_HAVE_UNALIGNED_ACCESS */
379 * GST_WRITE_UINT32_BE:
380 * @data: memory location
381 * @num: value to store
383 * Store a 32 bit unsigned integer value in big endian format into the memory buffer.
386 * GST_WRITE_UINT32_LE:
387 * @data: memory location
388 * @num: value to store
390 * Store a 32 bit unsigned integer value in little endian format into the memory buffer.
392 #if GST_HAVE_UNALIGNED_ACCESS
393 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
394 # define GST_WRITE_UINT32_BE(data,val) _GST_FAST_WRITE(32,data,val)
395 # define GST_WRITE_UINT32_LE(data,val) _GST_FAST_WRITE_SWAP(32,data,val)
397 # define GST_WRITE_UINT32_BE(data,val) _GST_FAST_WRITE_SWAP(32,data,val)
398 # define GST_WRITE_UINT32_LE(data,val) _GST_FAST_WRITE(32,data,val)
401 #define GST_WRITE_UINT32_BE(data, num) do { \
402 gpointer __put_data = data; \
403 _GST_PUT (__put_data, 0, 32, 24, num); \
404 _GST_PUT (__put_data, 1, 32, 16, num); \
405 _GST_PUT (__put_data, 2, 32, 8, num); \
406 _GST_PUT (__put_data, 3, 32, 0, num); \
409 #define GST_WRITE_UINT32_LE(data, num) do { \
410 gpointer __put_data = data; \
411 _GST_PUT (__put_data, 0, 32, 0, num); \
412 _GST_PUT (__put_data, 1, 32, 8, num); \
413 _GST_PUT (__put_data, 2, 32, 16, num); \
414 _GST_PUT (__put_data, 3, 32, 24, num); \
416 #endif /* !GST_HAVE_UNALIGNED_ACCESS */
419 * GST_WRITE_UINT24_BE:
420 * @data: memory location
421 * @num: value to store
423 * Store a 24 bit unsigned integer value in big endian format into the memory buffer.
425 #define GST_WRITE_UINT24_BE(data, num) do { \
426 gpointer __put_data = data; \
427 _GST_PUT (__put_data, 0, 32, 16, num); \
428 _GST_PUT (__put_data, 1, 32, 8, num); \
429 _GST_PUT (__put_data, 2, 32, 0, num); \
433 * GST_WRITE_UINT24_LE:
434 * @data: memory location
435 * @num: value to store
437 * Store a 24 bit unsigned integer value in little endian format into the memory buffer.
439 #define GST_WRITE_UINT24_LE(data, num) do { \
440 gpointer __put_data = data; \
441 _GST_PUT (__put_data, 0, 32, 0, num); \
442 _GST_PUT (__put_data, 1, 32, 8, num); \
443 _GST_PUT (__put_data, 2, 32, 16, num); \
447 * GST_WRITE_UINT16_BE:
448 * @data: memory location
449 * @num: value to store
451 * Store a 16 bit unsigned integer value in big endian format into the memory buffer.
454 * GST_WRITE_UINT16_LE:
455 * @data: memory location
456 * @num: value to store
458 * Store a 16 bit unsigned integer value in little endian format into the memory buffer.
460 #if GST_HAVE_UNALIGNED_ACCESS
461 # if (G_BYTE_ORDER == G_BIG_ENDIAN)
462 # define GST_WRITE_UINT16_BE(data,val) _GST_FAST_WRITE(16,data,val)
463 # define GST_WRITE_UINT16_LE(data,val) _GST_FAST_WRITE_SWAP(16,data,val)
465 # define GST_WRITE_UINT16_BE(data,val) _GST_FAST_WRITE_SWAP(16,data,val)
466 # define GST_WRITE_UINT16_LE(data,val) _GST_FAST_WRITE(16,data,val)
469 #define GST_WRITE_UINT16_BE(data, num) do { \
470 gpointer __put_data = data; \
471 _GST_PUT (__put_data, 0, 16, 8, num); \
472 _GST_PUT (__put_data, 1, 16, 0, num); \
475 #define GST_WRITE_UINT16_LE(data, num) do { \
476 gpointer __put_data = data; \
477 _GST_PUT (__put_data, 0, 16, 0, num); \
478 _GST_PUT (__put_data, 1, 16, 8, num); \
480 #endif /* !GST_HAVE_UNALIGNED_ACCESS */
484 * @data: memory location
485 * @num: value to store
487 * Store an 8 bit unsigned integer value into the memory buffer.
489 #define GST_WRITE_UINT8(data, num) do { \
490 _GST_PUT (data, 0, 8, 0, num); \
493 /* Float endianness conversion macros */
495 /* FIXME: Remove this once we depend on a GLib version with this */
496 #ifndef GFLOAT_FROM_LE
501 * Swap byte order of a 32-bit floating point value (float).
503 * Returns: @in byte-swapped.
506 GFLOAT_SWAP_LE_BE(gfloat in)
515 u.i = GUINT32_SWAP_LE_BE (u.i);
520 * GDOUBLE_SWAP_LE_BE:
523 * Swap byte order of a 64-bit floating point value (double).
525 * Returns: @in byte-swapped.
527 static inline gdouble
528 GDOUBLE_SWAP_LE_BE(gdouble in)
537 u.i = GUINT64_SWAP_LE_BE (u.i);
545 * Convert 64-bit floating point value (double) from native byte order into
546 * little endian byte order.
552 * Convert 64-bit floating point value (double) from native byte order into
553 * big endian byte order.
559 * Convert 64-bit floating point value (double) from little endian byte order
560 * into native byte order.
566 * Convert 64-bit floating point value (double) from big endian byte order
567 * into native byte order.
574 * Convert 32-bit floating point value (float) from native byte order into
575 * little endian byte order.
581 * Convert 32-bit floating point value (float) from native byte order into
582 * big endian byte order.
588 * Convert 32-bit floating point value (float) from little endian byte order
589 * into native byte order.
595 * Convert 32-bit floating point value (float) from big endian byte order
596 * into native byte order.
599 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
600 #define GFLOAT_TO_LE(val) ((gfloat) (val))
601 #define GFLOAT_TO_BE(val) (GFLOAT_SWAP_LE_BE (val))
602 #define GDOUBLE_TO_LE(val) ((gdouble) (val))
603 #define GDOUBLE_TO_BE(val) (GDOUBLE_SWAP_LE_BE (val))
605 #elif G_BYTE_ORDER == G_BIG_ENDIAN
606 #define GFLOAT_TO_LE(val) (GFLOAT_SWAP_LE_BE (val))
607 #define GFLOAT_TO_BE(val) ((gfloat) (val))
608 #define GDOUBLE_TO_LE(val) (GDOUBLE_SWAP_LE_BE (val))
609 #define GDOUBLE_TO_BE(val) ((gdouble) (val))
611 #else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
612 #error unknown ENDIAN type
613 #endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
615 #define GFLOAT_FROM_LE(val) (GFLOAT_TO_LE (val))
616 #define GFLOAT_FROM_BE(val) (GFLOAT_TO_BE (val))
617 #define GDOUBLE_FROM_LE(val) (GDOUBLE_TO_LE (val))
618 #define GDOUBLE_FROM_BE(val) (GDOUBLE_TO_BE (val))
620 #endif /* !defined(GFLOAT_FROM_LE) */
624 * @data: memory location
626 * Read a 32 bit float value in little endian format from the memory buffer.
628 * Returns: The floating point value read from @data
631 GST_READ_FLOAT_LE(const guint8 *data)
639 u.i = GST_READ_UINT32_LE (data);
645 * @data: memory location
647 * Read a 32 bit float value in big endian format from the memory buffer.
649 * Returns: The floating point value read from @data
652 GST_READ_FLOAT_BE(const guint8 *data)
660 u.i = GST_READ_UINT32_BE (data);
665 * GST_READ_DOUBLE_LE:
666 * @data: memory location
668 * Read a 64 bit double value in little endian format from the memory buffer.
670 * Returns: The double-precision floating point value read from @data
672 static inline gdouble
673 GST_READ_DOUBLE_LE(const guint8 *data)
681 u.i = GST_READ_UINT64_LE (data);
686 * GST_READ_DOUBLE_BE:
687 * @data: memory location
689 * Read a 64 bit double value in big endian format from the memory buffer.
691 * Returns: The double-precision floating point value read from @data
693 static inline gdouble
694 GST_READ_DOUBLE_BE(const guint8 *data)
702 u.i = GST_READ_UINT64_BE (data);
707 * GST_WRITE_FLOAT_LE:
708 * @data: memory location
709 * @num: value to store
711 * Store a 32 bit float value in little endian format into the memory buffer.
714 GST_WRITE_FLOAT_LE(guint8 *data, gfloat num)
723 GST_WRITE_UINT32_LE (data, u.i);
727 * GST_WRITE_FLOAT_BE:
728 * @data: memory location
729 * @num: value to store
731 * Store a 32 bit float value in big endian format into the memory buffer.
734 GST_WRITE_FLOAT_BE(guint8 *data, gfloat num)
743 GST_WRITE_UINT32_BE (data, u.i);
747 * GST_WRITE_DOUBLE_LE:
748 * @data: memory location
749 * @num: value to store
751 * Store a 64 bit double value in little endian format into the memory buffer.
754 GST_WRITE_DOUBLE_LE(guint8 *data, gdouble num)
763 GST_WRITE_UINT64_LE (data, u.i);
767 * GST_WRITE_DOUBLE_BE:
768 * @data: memory location
769 * @num: value to store
771 * Store a 64 bit double value in big endian format into the memory buffer.
774 GST_WRITE_DOUBLE_BE(guint8 *data, gdouble num)
783 GST_WRITE_UINT64_BE (data, u.i);
786 /* Miscellaneous utility macros */
790 * @num: integer value to round up
792 * Rounds an integer value up to the next multiple of 2.
794 #define GST_ROUND_UP_2(num) (((num)+1)&~1)
797 * @num: integer value to round up
799 * Rounds an integer value up to the next multiple of 4.
801 #define GST_ROUND_UP_4(num) (((num)+3)&~3)
804 * @num: integer value to round up
806 * Rounds an integer value up to the next multiple of 8.
808 #define GST_ROUND_UP_8(num) (((num)+7)&~7)
811 * @num: integer value to round up
813 * Rounds an integer value up to the next multiple of 16.
815 #define GST_ROUND_UP_16(num) (((num)+15)&~15)
818 * @num: integer value to round up
820 * Rounds an integer value up to the next multiple of 32.
822 #define GST_ROUND_UP_32(num) (((num)+31)&~31)
825 * @num: integer value to round up
827 * Rounds an integer value up to the next multiple of 64.
829 #define GST_ROUND_UP_64(num) (((num)+63)&~63)
832 * @num: integer value to round up
834 * Rounds an integer value up to the next multiple of 128.
837 #define GST_ROUND_UP_128(num) (((num)+127)&~127)
840 * @num: integrer value to round up
841 * @align: a power of two to round up to
843 * Rounds an integer value up to the next multiple of @align. @align MUST be a
846 #define GST_ROUND_UP_N(num,align) ((((num) + ((align) - 1)) & ~((align) - 1)))
851 * @num: integer value to round down
853 * Rounds an integer value down to the next multiple of 2.
855 #define GST_ROUND_DOWN_2(num) ((num)&(~1))
858 * @num: integer value to round down
860 * Rounds an integer value down to the next multiple of 4.
862 #define GST_ROUND_DOWN_4(num) ((num)&(~3))
865 * @num: integer value to round down
867 * Rounds an integer value down to the next multiple of 8.
869 #define GST_ROUND_DOWN_8(num) ((num)&(~7))
872 * @num: integer value to round down
874 * Rounds an integer value down to the next multiple of 16.
876 #define GST_ROUND_DOWN_16(num) ((num)&(~15))
879 * @num: integer value to round down
881 * Rounds an integer value down to the next multiple of 32.
883 #define GST_ROUND_DOWN_32(num) ((num)&(~31))
886 * @num: integer value to round down
888 * Rounds an integer value down to the next multiple of 64.
890 #define GST_ROUND_DOWN_64(num) ((num)&(~63))
892 * GST_ROUND_DOWN_128:
893 * @num: integer value to round down
895 * Rounds an integer value down to the next multiple of 128.
898 #define GST_ROUND_DOWN_128(num) ((num)&(~127))
901 * @num: integrer value to round down
902 * @align: a power of two to round down to
904 * Rounds an integer value down to the next multiple of @align. @align MUST be a
907 #define GST_ROUND_DOWN_N(num,align) (((num) & ~((align) - 1)))
910 void gst_object_default_error (GstObject * source,
911 const GError * error,
912 const gchar * debug);
914 /* element functions */
915 void gst_element_create_all_pads (GstElement *element);
916 GstPad* gst_element_get_compatible_pad (GstElement *element, GstPad *pad,
919 GstPadTemplate* gst_element_get_compatible_pad_template (GstElement *element, GstPadTemplate *compattempl);
921 const gchar* gst_element_state_get_name (GstState state);
922 const gchar * gst_element_state_change_return_get_name (GstStateChangeReturn state_ret);
924 gboolean gst_element_link (GstElement *src, GstElement *dest);
925 gboolean gst_element_link_many (GstElement *element_1,
926 GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
927 gboolean gst_element_link_filtered (GstElement * src,
930 void gst_element_unlink (GstElement *src, GstElement *dest);
931 void gst_element_unlink_many (GstElement *element_1,
932 GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
934 gboolean gst_element_link_pads (GstElement *src, const gchar *srcpadname,
935 GstElement *dest, const gchar *destpadname);
936 gboolean gst_element_link_pads_full (GstElement *src, const gchar *srcpadname,
937 GstElement *dest, const gchar *destpadname,
938 GstPadLinkCheck flags);
939 void gst_element_unlink_pads (GstElement *src, const gchar *srcpadname,
940 GstElement *dest, const gchar *destpadname);
942 gboolean gst_element_link_pads_filtered (GstElement * src, const gchar * srcpadname,
943 GstElement * dest, const gchar * destpadname,
946 gboolean gst_element_seek_simple (GstElement *element,
948 GstSeekFlags seek_flags,
951 /* util elementfactory functions */
952 gboolean gst_element_factory_can_sink_all_caps (GstElementFactory *factory, const GstCaps *caps);
953 gboolean gst_element_factory_can_src_all_caps (GstElementFactory *factory, const GstCaps *caps);
954 gboolean gst_element_factory_can_sink_any_caps (GstElementFactory *factory, const GstCaps *caps);
955 gboolean gst_element_factory_can_src_any_caps (GstElementFactory *factory, const GstCaps *caps);
957 /* util query functions */
958 gboolean gst_element_query_position (GstElement *element, GstFormat format, gint64 *cur);
959 gboolean gst_element_query_duration (GstElement *element, GstFormat format, gint64 *duration);
960 gboolean gst_element_query_convert (GstElement *element, GstFormat src_format, gint64 src_val,
961 GstFormat dest_format, gint64 *dest_val);
964 void gst_pad_use_fixed_caps (GstPad *pad);
965 GstElement* gst_pad_get_parent_element (GstPad *pad);
967 /* util query functions */
968 gboolean gst_pad_proxy_query_accept_caps (GstPad *pad, GstQuery *query);
969 gboolean gst_pad_proxy_query_caps (GstPad *pad, GstQuery *query);
971 gboolean gst_pad_query_position (GstPad *pad, GstFormat format, gint64 *cur);
972 gboolean gst_pad_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
973 gboolean gst_pad_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
974 GstFormat dest_format, gint64 *dest_val);
975 GstCaps * gst_pad_query_caps (GstPad *pad, GstCaps *filter);
976 gboolean gst_pad_query_accept_caps (GstPad *pad, GstCaps *caps);
978 gboolean gst_pad_link_maybe_ghosting (GstPad *src,
980 gboolean gst_pad_link_maybe_ghosting_full (GstPad *src,
982 GstPadLinkCheck flags);
984 gboolean gst_pad_peer_query_position (GstPad *pad, GstFormat format, gint64 *cur);
985 gboolean gst_pad_peer_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
986 gboolean gst_pad_peer_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
987 GstFormat dest_format, gint64 *dest_val);
988 GstCaps * gst_pad_peer_query_caps (GstPad * pad, GstCaps *filter);
989 gboolean gst_pad_peer_query_accept_caps (GstPad * pad, GstCaps *caps);
991 gchar * gst_pad_create_stream_id (GstPad * pad, GstElement * parent, const gchar *stream_id) G_GNUC_MALLOC;
992 gchar * gst_pad_create_stream_id_printf (GstPad * pad, GstElement * parent, const gchar *stream_id, ...) G_GNUC_PRINTF (3, 4) G_GNUC_MALLOC;
993 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;
995 gchar * gst_pad_get_stream_id (GstPad * pad);
996 GstStream * gst_pad_get_stream (GstPad * pad);
999 void gst_bin_add_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
1000 void gst_bin_remove_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
1001 GstPad * gst_bin_find_unlinked_pad (GstBin *bin, GstPadDirection direction);
1003 gboolean gst_bin_sync_children_states (GstBin *bin);
1005 /* parse utility functions */
1006 GstElement * gst_parse_bin_from_description (const gchar * bin_description,
1007 gboolean ghost_unlinked_pads,
1010 GstElement * gst_parse_bin_from_description_full (const gchar * bin_description,
1011 gboolean ghost_unlinked_pads,
1012 GstParseContext * context,
1013 GstParseFlags flags,
1016 GstClockTime gst_util_get_timestamp (void);
1020 * @GST_SEARCH_MODE_EXACT : Only search for exact matches.
1021 * @GST_SEARCH_MODE_BEFORE: Search for an exact match or the element just before.
1022 * @GST_SEARCH_MODE_AFTER : Search for an exact match or the element just after.
1024 * The different search modes.
1027 GST_SEARCH_MODE_EXACT = 0,
1028 GST_SEARCH_MODE_BEFORE,
1029 GST_SEARCH_MODE_AFTER
1032 gpointer gst_util_array_binary_search (gpointer array, guint num_elements,
1033 gsize element_size, GCompareDataFunc search_func,
1034 GstSearchMode mode, gconstpointer search_data,
1035 gpointer user_data);
1037 /* fraction operations */
1038 gint gst_util_greatest_common_divisor (gint a, gint b);
1039 gint64 gst_util_greatest_common_divisor_int64 (gint64 a, gint64 b);
1041 void gst_util_fraction_to_double (gint src_n, gint src_d, gdouble *dest);
1042 void gst_util_double_to_fraction (gdouble src, gint *dest_n, gint *dest_d);
1044 gboolean gst_util_fraction_multiply (gint a_n, gint a_d, gint b_n, gint b_d,
1045 gint *res_n, gint *res_d);
1046 gboolean gst_util_fraction_add (gint a_n, gint a_d, gint b_n, gint b_d,
1047 gint *res_n, gint *res_d);
1048 gint gst_util_fraction_compare (gint a_n, gint a_d, gint b_n, gint b_d);
1053 #endif /* __GST_UTILS_H__ */