1/* GStreamer
2 * Copyright (C) 1999,2000 Erik Walthinsen <[email protected]>
3 * 2000 Wim Taymans <[email protected]>
4 * 2002 Thomas Vander Stichele <[email protected]>
5 *
6 * gstutils.h: Header for various utility functions
7 *
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.
12 *
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.
17 *
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.
22 */
23
24
25#ifndef __GST_UTILS_H__
26#define __GST_UTILS_H__
27
28#include <glib.h>
29#include <gst/gstconfig.h>
30#include <gst/gstbin.h>
31#include <gst/gstparse.h>
32
33G_BEGIN_DECLS
34
35GST_API
36void gst_util_set_value_from_string (GValue *value, const gchar *value_str);
37
38GST_API
39void gst_util_set_object_arg (GObject *object, const gchar *name, const gchar *value);
40
41GST_API
42gboolean gst_util_set_object_array (GObject * object, const gchar * name,
43 const GValueArray * array);
44GST_API
45gboolean gst_util_get_object_array (GObject * object, const gchar * name,
46 GValueArray ** array);
47GST_API
48void gst_util_dump_mem (const guchar *mem, guint size);
49
50GST_API
51void gst_util_dump_buffer (GstBuffer * buf);
52
53GST_API
54guint64 gst_util_gdouble_to_guint64 (gdouble value) G_GNUC_CONST;
55
56GST_API
57gdouble gst_util_guint64_to_gdouble (guint64 value) G_GNUC_CONST;
58
59/**
60 * gst_guint64_to_gdouble:
61 * @value: the #guint64 value to convert
62 *
63 * Convert @value to a gdouble.
64 *
65 * Returns: @value converted to a #gdouble.
66 */
67
68/**
69 * gst_gdouble_to_guint64:
70 * @value: the #gdouble value to convert
71 *
72 * Convert @value to a guint64.
73 *
74 * Returns: @value converted to a #guint64.
75 */
76#ifdef WIN32
77#define gst_gdouble_to_guint64(value) gst_util_gdouble_to_guint64(value)
78#define gst_guint64_to_gdouble(value) gst_util_guint64_to_gdouble(value)
79#else
80#define gst_gdouble_to_guint64(value) ((guint64) (value))
81#define gst_guint64_to_gdouble(value) ((gdouble) (value))
82#endif
83
84GST_API
85guint64 gst_util_uint64_scale (guint64 val, guint64 num, guint64 denom);
86
87GST_API
88guint64 gst_util_uint64_scale_round (guint64 val, guint64 num, guint64 denom);
89
90GST_API
91guint64 gst_util_uint64_scale_ceil (guint64 val, guint64 num, guint64 denom);
92
93GST_API
94guint64 gst_util_uint64_scale_int (guint64 val, gint num, gint denom);
95
96GST_API
97guint64 gst_util_uint64_scale_int_round (guint64 val, gint num, gint denom);
98
99GST_API
100guint64 gst_util_uint64_scale_int_ceil (guint64 val, gint num, gint denom);
101
102/**
103 * GST_SEQNUM_INVALID:
104 *
105 * A value which is guaranteed to never be returned by
106 * gst_util_seqnum_next().
107 *
108 * Can be used as a default value in variables used to store seqnum.
109 *
110 * Since: 1.14
111 */
112#define GST_SEQNUM_INVALID (0)
113
114GST_API
115guint32 gst_util_seqnum_next (void);
116
117GST_API
118gint32 gst_util_seqnum_compare (guint32 s1, guint32 s2);
119
120/**
121 * GST_GROUP_ID_INVALID:
122 *
123 * A value which is guaranteed to never be returned by
124 * gst_util_group_id_next().
125 *
126 * Can be used as a default value in variables used to store group_id.
127 *
128 * Since: 1.14
129 */
130#define GST_GROUP_ID_INVALID (0)
131
132GST_API
133guint gst_util_group_id_next (void);
134
135/**
136 * GST_CALL_PARENT:
137 * @parent_class_cast: the name of the class cast macro for the parent type
138 * @name: name of the function to call
139 * @args: arguments enclosed in '( )'
140 *
141 * Just call the parent handler. This assumes that there is a variable
142 * named parent_class that points to the (duh!) parent class. Note that
143 * this macro is not to be used with things that return something, use
144 * the _WITH_DEFAULT version for that
145 */
146#define GST_CALL_PARENT(parent_class_cast, name, args) \
147 ((parent_class_cast(parent_class)->name != NULL) ? \
148 parent_class_cast(parent_class)->name args : (void) 0)
149
150/**
151 * GST_CALL_PARENT_WITH_DEFAULT:
152 * @parent_class_cast: the name of the class cast macro for the parent type
153 * @name: name of the function to call
154 * @args: arguments enclosed in '( )'
155 * @def_return: default result
156 *
157 * Same as GST_CALL_PARENT(), but in case there is no implementation, it
158 * evaluates to @def_return.
159 */
160#define GST_CALL_PARENT_WITH_DEFAULT(parent_class_cast, name, args, def_return)\
161 ((parent_class_cast(parent_class)->name != NULL) ? \
162 parent_class_cast(parent_class)->name args : def_return)
163
164/* Define PUT and GET functions for unaligned memory */
165#define _GST_GET(__data, __idx, __size, __shift) \
166 (((guint##__size) (((const guint8 *) (__data))[__idx])) << (__shift))
167
168#define _GST_PUT(__data, __idx, __size, __shift, __num) \
169 (((guint8 *) (__data))[__idx] = (((guint##__size) (__num)) >> (__shift)) & 0xff)
170
171#ifndef __GTK_DOC_IGNORE__
172#if GST_HAVE_UNALIGNED_ACCESS
173static inline guint16 __gst_fast_read16(const guint8 *v) {
174 return *(const guint16*)(const void*)(v);
175}
176static inline guint32 __gst_fast_read32(const guint8 *v) {
177 return *(const guint32*)(const void*)(v);
178}
179static inline guint64 __gst_fast_read64(const guint8 *v) {
180 return *(const guint64*)(const void*)(v);
181}
182static inline guint16 __gst_fast_read_swap16(const guint8 *v) {
183 return GUINT16_SWAP_LE_BE(*(const guint16*)(const void*)(v));
184}
185static inline guint32 __gst_fast_read_swap32(const guint8 *v) {
186 return GUINT32_SWAP_LE_BE(*(const guint32*)(const void*)(v));
187}
188static inline guint64 __gst_fast_read_swap64(const guint8 *v) {
189 return GUINT64_SWAP_LE_BE(*(const guint64*)(const void*)(v));
190}
191# define _GST_FAST_READ(s, d) __gst_fast_read##s((const guint8 *)(d))
192# define _GST_FAST_READ_SWAP(s, d) __gst_fast_read_swap##s((const guint8 *)(d))
193
194static inline void __gst_fast_write16 (guint8 *p, guint16 v) {
195 *(guint16*)(void*)(p) = v;
196}
197static inline void __gst_fast_write32 (guint8 *p, guint32 v) {
198 *(guint32*)(void*)(p) = v;
199}
200static inline void __gst_fast_write64 (guint8 *p, guint64 v) {
201 *(guint64*)(void*)(p) = v;
202}
203static inline void __gst_fast_write_swap16 (guint8 *p, guint16 v) {
204 *(guint16*)(void*)(p) = GUINT16_SWAP_LE_BE (v);
205}
206static inline void __gst_fast_write_swap32 (guint8 *p, guint32 v) {
207 *(guint32*)(void*)(p) = GUINT32_SWAP_LE_BE (v);
208}
209static inline void __gst_fast_write_swap64 (guint8 *p, guint64 v) {
210 *(guint64*)(void*)(p) = GUINT64_SWAP_LE_BE (v);
211}
212# define _GST_FAST_WRITE(s, d, v) __gst_fast_write##s((guint8 *)(d), (v))
213# define _GST_FAST_WRITE_SWAP(s, d, v) __gst_fast_write_swap##s((guint8 *)(d), (v))
214#endif
215#endif
216
217
218/**
219 * GST_READ_UINT64_BE:
220 * @data: memory location
221 *
222 * Read a 64 bit unsigned integer value in big endian format from the memory buffer.
223 */
224
225/**
226 * GST_READ_UINT64_LE:
227 * @data: memory location
228 *
229 * Read a 64 bit unsigned integer value in little endian format from the memory buffer.
230 */
231#if GST_HAVE_UNALIGNED_ACCESS
232# if (G_BYTE_ORDER == G_BIG_ENDIAN)
233# define GST_READ_UINT64_BE(data) _GST_FAST_READ (64, data)
234# define GST_READ_UINT64_LE(data) _GST_FAST_READ_SWAP (64, data)
235# else
236# define GST_READ_UINT64_BE(data) _GST_FAST_READ_SWAP (64, data)
237# define GST_READ_UINT64_LE(data) _GST_FAST_READ (64, data)
238# endif
239#else
240#define _GST_READ_UINT64_BE(data) (_GST_GET (data, 0, 64, 56) | \
241 _GST_GET (data, 1, 64, 48) | \
242 _GST_GET (data, 2, 64, 40) | \
243 _GST_GET (data, 3, 64, 32) | \
244 _GST_GET (data, 4, 64, 24) | \
245 _GST_GET (data, 5, 64, 16) | \
246 _GST_GET (data, 6, 64, 8) | \
247 _GST_GET (data, 7, 64, 0))
248
249#define _GST_READ_UINT64_LE(data) (_GST_GET (data, 7, 64, 56) | \
250 _GST_GET (data, 6, 64, 48) | \
251 _GST_GET (data, 5, 64, 40) | \
252 _GST_GET (data, 4, 64, 32) | \
253 _GST_GET (data, 3, 64, 24) | \
254 _GST_GET (data, 2, 64, 16) | \
255 _GST_GET (data, 1, 64, 8) | \
256 _GST_GET (data, 0, 64, 0))
257
258#define GST_READ_UINT64_BE(data) __gst_slow_read64_be((const guint8 *)(data))
259static inline guint64 __gst_slow_read64_be (const guint8 * data) {
260 return _GST_READ_UINT64_BE (data);
261}
262#define GST_READ_UINT64_LE(data) __gst_slow_read64_le((const guint8 *)(data))
263static inline guint64 __gst_slow_read64_le (const guint8 * data) {
264 return _GST_READ_UINT64_LE (data);
265}
266#endif
267
268/**
269 * GST_READ_UINT32_BE:
270 * @data: memory location
271 *
272 * Read a 32 bit unsigned integer value in big endian format from the memory buffer.
273 */
274
275/**
276 * GST_READ_UINT32_LE:
277 * @data: memory location
278 *
279 * Read a 32 bit unsigned integer value in little endian format from the memory buffer.
280 */
281#if GST_HAVE_UNALIGNED_ACCESS
282# if (G_BYTE_ORDER == G_BIG_ENDIAN)
283# define GST_READ_UINT32_BE(data) _GST_FAST_READ (32, data)
284# define GST_READ_UINT32_LE(data) _GST_FAST_READ_SWAP (32, data)
285# else
286# define GST_READ_UINT32_BE(data) _GST_FAST_READ_SWAP (32, data)
287# define GST_READ_UINT32_LE(data) _GST_FAST_READ (32, data)
288# endif
289#else
290#define _GST_READ_UINT32_BE(data) (_GST_GET (data, 0, 32, 24) | \
291 _GST_GET (data, 1, 32, 16) | \
292 _GST_GET (data, 2, 32, 8) | \
293 _GST_GET (data, 3, 32, 0))
294
295#define _GST_READ_UINT32_LE(data) (_GST_GET (data, 3, 32, 24) | \
296 _GST_GET (data, 2, 32, 16) | \
297 _GST_GET (data, 1, 32, 8) | \
298 _GST_GET (data, 0, 32, 0))
299
300#define GST_READ_UINT32_BE(data) __gst_slow_read32_be((const guint8 *)(data))
301static inline guint32 __gst_slow_read32_be (const guint8 * data) {
302 return _GST_READ_UINT32_BE (data);
303}
304#define GST_READ_UINT32_LE(data) __gst_slow_read32_le((const guint8 *)(data))
305static inline guint32 __gst_slow_read32_le (const guint8 * data) {
306 return _GST_READ_UINT32_LE (data);
307}
308#endif
309
310/**
311 * GST_READ_UINT24_BE:
312 * @data: memory location
313 *
314 * Read a 24 bit unsigned integer value in big endian format from the memory buffer.
315 */
316#define _GST_READ_UINT24_BE(data) (_GST_GET (data, 0, 32, 16) | \
317 _GST_GET (data, 1, 32, 8) | \
318 _GST_GET (data, 2, 32, 0))
319
320#define GST_READ_UINT24_BE(data) __gst_slow_read24_be((const guint8 *)(data))
321static inline guint32 __gst_slow_read24_be (const guint8 * data) {
322 return _GST_READ_UINT24_BE (data);
323}
324
325/**
326 * GST_READ_UINT24_LE:
327 * @data: memory location
328 *
329 * Read a 24 bit unsigned integer value in little endian format from the memory buffer.
330 */
331#define _GST_READ_UINT24_LE(data) (_GST_GET (data, 2, 32, 16) | \
332 _GST_GET (data, 1, 32, 8) | \
333 _GST_GET (data, 0, 32, 0))
334
335#define GST_READ_UINT24_LE(data) __gst_slow_read24_le((const guint8 *)(data))
336static inline guint32 __gst_slow_read24_le (const guint8 * data) {
337 return _GST_READ_UINT24_LE (data);
338}
339
340/**
341 * GST_READ_UINT16_BE:
342 * @data: memory location
343 *
344 * Read a 16 bit unsigned integer value in big endian format from the memory buffer.
345 */
346/**
347 * GST_READ_UINT16_LE:
348 * @data: memory location
349 *
350 * Read a 16 bit unsigned integer value in little endian format from the memory buffer.
351 */
352#if GST_HAVE_UNALIGNED_ACCESS
353# if (G_BYTE_ORDER == G_BIG_ENDIAN)
354# define GST_READ_UINT16_BE(data) _GST_FAST_READ (16, data)
355# define GST_READ_UINT16_LE(data) _GST_FAST_READ_SWAP (16, data)
356# else
357# define GST_READ_UINT16_BE(data) _GST_FAST_READ_SWAP (16, data)
358# define GST_READ_UINT16_LE(data) _GST_FAST_READ (16, data)
359# endif
360#else
361#define _GST_READ_UINT16_BE(data) (_GST_GET (data, 0, 16, 8) | \
362 _GST_GET (data, 1, 16, 0))
363
364#define _GST_READ_UINT16_LE(data) (_GST_GET (data, 1, 16, 8) | \
365 _GST_GET (data, 0, 16, 0))
366
367#define GST_READ_UINT16_BE(data) __gst_slow_read16_be((const guint8 *)(data))
368static inline guint16 __gst_slow_read16_be (const guint8 * data) {
369 return _GST_READ_UINT16_BE (data);
370}
371#define GST_READ_UINT16_LE(data) __gst_slow_read16_le((const guint8 *)(data))
372static inline guint16 __gst_slow_read16_le (const guint8 * data) {
373 return _GST_READ_UINT16_LE (data);
374}
375#endif
376
377/**
378 * GST_READ_UINT8:
379 * @data: memory location
380 *
381 * Read an 8 bit unsigned integer value from the memory buffer.
382 */
383#define GST_READ_UINT8(data) (_GST_GET (data, 0, 8, 0))
384
385/**
386 * GST_WRITE_UINT64_BE:
387 * @data: memory location
388 * @val: value to store
389 *
390 * Store a 64 bit unsigned integer value in big endian format into the memory buffer.
391 */
392/**
393 * GST_WRITE_UINT64_LE:
394 * @data: memory location
395 * @val: value to store
396 *
397 * Store a 64 bit unsigned integer value in little endian format into the memory buffer.
398 */
399#if GST_HAVE_UNALIGNED_ACCESS
400# if (G_BYTE_ORDER == G_BIG_ENDIAN)
401# define GST_WRITE_UINT64_BE(data,val) _GST_FAST_WRITE(64,data,val)
402# define GST_WRITE_UINT64_LE(data,val) _GST_FAST_WRITE_SWAP(64,data,val)
403# else
404# define GST_WRITE_UINT64_BE(data,val) _GST_FAST_WRITE_SWAP(64,data,val)
405# define GST_WRITE_UINT64_LE(data,val) _GST_FAST_WRITE(64,data,val)
406# endif
407#else
408#define GST_WRITE_UINT64_BE(data,val) do { \
409 gpointer __put_data = data; \
410 guint64 __put_val = val; \
411 _GST_PUT (__put_data, 0, 64, 56, __put_val); \
412 _GST_PUT (__put_data, 1, 64, 48, __put_val); \
413 _GST_PUT (__put_data, 2, 64, 40, __put_val); \
414 _GST_PUT (__put_data, 3, 64, 32, __put_val); \
415 _GST_PUT (__put_data, 4, 64, 24, __put_val); \
416 _GST_PUT (__put_data, 5, 64, 16, __put_val); \
417 _GST_PUT (__put_data, 6, 64, 8, __put_val); \
418 _GST_PUT (__put_data, 7, 64, 0, __put_val); \
419 } while (0)
420
421#define GST_WRITE_UINT64_LE(data,val) do { \
422 gpointer __put_data = data; \
423 guint64 __put_val = val; \
424 _GST_PUT (__put_data, 0, 64, 0, __put_val); \
425 _GST_PUT (__put_data, 1, 64, 8, __put_val); \
426 _GST_PUT (__put_data, 2, 64, 16, __put_val); \
427 _GST_PUT (__put_data, 3, 64, 24, __put_val); \
428 _GST_PUT (__put_data, 4, 64, 32, __put_val); \
429 _GST_PUT (__put_data, 5, 64, 40, __put_val); \
430 _GST_PUT (__put_data, 6, 64, 48, __put_val); \
431 _GST_PUT (__put_data, 7, 64, 56, __put_val); \
432 } while (0)
433#endif /* !GST_HAVE_UNALIGNED_ACCESS */
434
435/**
436 * GST_WRITE_UINT32_BE:
437 * @data: memory location
438 * @val: value to store
439 *
440 * Store a 32 bit unsigned integer value in big endian format into the memory buffer.
441 */
442/**
443 * GST_WRITE_UINT32_LE:
444 * @data: memory location
445 * @val: value to store
446 *
447 * Store a 32 bit unsigned integer value in little endian format into the memory buffer.
448 */
449#if GST_HAVE_UNALIGNED_ACCESS
450# if (G_BYTE_ORDER == G_BIG_ENDIAN)
451# define GST_WRITE_UINT32_BE(data,val) _GST_FAST_WRITE(32,data,val)
452# define GST_WRITE_UINT32_LE(data,val) _GST_FAST_WRITE_SWAP(32,data,val)
453# else
454# define GST_WRITE_UINT32_BE(data,val) _GST_FAST_WRITE_SWAP(32,data,val)
455# define GST_WRITE_UINT32_LE(data,val) _GST_FAST_WRITE(32,data,val)
456# endif
457#else
458#define GST_WRITE_UINT32_BE(data,val) do { \
459 gpointer __put_data = data; \
460 guint32 __put_val = val; \
461 _GST_PUT (__put_data, 0, 32, 24, __put_val); \
462 _GST_PUT (__put_data, 1, 32, 16, __put_val); \
463 _GST_PUT (__put_data, 2, 32, 8, __put_val); \
464 _GST_PUT (__put_data, 3, 32, 0, __put_val); \
465 } while (0)
466
467#define GST_WRITE_UINT32_LE(data,val) do { \
468 gpointer __put_data = data; \
469 guint32 __put_val = val; \
470 _GST_PUT (__put_data, 0, 32, 0, __put_val); \
471 _GST_PUT (__put_data, 1, 32, 8, __put_val); \
472 _GST_PUT (__put_data, 2, 32, 16, __put_val); \
473 _GST_PUT (__put_data, 3, 32, 24, __put_val); \
474 } while (0)
475#endif /* !GST_HAVE_UNALIGNED_ACCESS */
476
477/**
478 * GST_WRITE_UINT24_BE:
479 * @data: memory location
480 * @num: value to store
481 *
482 * Store a 24 bit unsigned integer value in big endian format into the memory buffer.
483 */
484#define GST_WRITE_UINT24_BE(data, num) do { \
485 gpointer __put_data = data; \
486 guint32 __put_val = num; \
487 _GST_PUT (__put_data, 0, 32, 16, __put_val); \
488 _GST_PUT (__put_data, 1, 32, 8, __put_val); \
489 _GST_PUT (__put_data, 2, 32, 0, __put_val); \
490 } while (0)
491
492/**
493 * GST_WRITE_UINT24_LE:
494 * @data: memory location
495 * @num: value to store
496 *
497 * Store a 24 bit unsigned integer value in little endian format into the memory buffer.
498 */
499#define GST_WRITE_UINT24_LE(data, num) do { \
500 gpointer __put_data = data; \
501 guint32 __put_val = num; \
502 _GST_PUT (__put_data, 0, 32, 0, __put_val); \
503 _GST_PUT (__put_data, 1, 32, 8, __put_val); \
504 _GST_PUT (__put_data, 2, 32, 16, __put_val); \
505 } while (0)
506
507/**
508 * GST_WRITE_UINT16_BE:
509 * @data: memory location
510 * @val: value to store
511 *
512 * Store a 16 bit unsigned integer value in big endian format into the memory buffer.
513 */
514/**
515 * GST_WRITE_UINT16_LE:
516 * @data: memory location
517 * @val: value to store
518 *
519 * Store a 16 bit unsigned integer value in little endian format into the memory buffer.
520 */
521#if GST_HAVE_UNALIGNED_ACCESS
522# if (G_BYTE_ORDER == G_BIG_ENDIAN)
523# define GST_WRITE_UINT16_BE(data,val) _GST_FAST_WRITE(16,data,val)
524# define GST_WRITE_UINT16_LE(data,val) _GST_FAST_WRITE_SWAP(16,data,val)
525# else
526# define GST_WRITE_UINT16_BE(data,val) _GST_FAST_WRITE_SWAP(16,data,val)
527# define GST_WRITE_UINT16_LE(data,val) _GST_FAST_WRITE(16,data,val)
528# endif
529#else
530#define GST_WRITE_UINT16_BE(data,val) do { \
531 gpointer __put_data = data; \
532 guint16 __put_val = val; \
533 _GST_PUT (__put_data, 0, 16, 8, __put_val); \
534 _GST_PUT (__put_data, 1, 16, 0, __put_val); \
535 } while (0)
536
537#define GST_WRITE_UINT16_LE(data,val) do { \
538 gpointer __put_data = data; \
539 guint16 __put_val = val; \
540 _GST_PUT (__put_data, 0, 16, 0, __put_val); \
541 _GST_PUT (__put_data, 1, 16, 8, __put_val); \
542 } while (0)
543#endif /* !GST_HAVE_UNALIGNED_ACCESS */
544
545/**
546 * GST_WRITE_UINT8:
547 * @data: memory location
548 * @num: value to store
549 *
550 * Store an 8 bit unsigned integer value into the memory buffer.
551 */
552#define GST_WRITE_UINT8(data, num) do { \
553 _GST_PUT (data, 0, 8, 0, num); \
554 } while (0)
555
556/* Float endianness conversion macros */
557#ifndef __GI_SCANNER__
558
559/* FIXME: Remove this once we depend on a GLib version with this */
560#ifndef GFLOAT_FROM_LE
561/**
562 * GFLOAT_SWAP_LE_BE: (skip)
563 * @in: input value
564 *
565 * Swap byte order of a 32-bit floating point value (float).
566 *
567 * Returns: @in byte-swapped.
568 */
569static inline gfloat
570GFLOAT_SWAP_LE_BE(gfloat in)
571{
572 union
573 {
574 guint32 i;
575 gfloat f;
576 } u;
577
578 u.f = in;
579 u.i = GUINT32_SWAP_LE_BE (u.i);
580 return u.f;
581}
582
583/**
584 * GDOUBLE_SWAP_LE_BE: (skip)
585 * @in: input value
586 *
587 * Swap byte order of a 64-bit floating point value (double).
588 *
589 * Returns: @in byte-swapped.
590 */
591static inline gdouble
592GDOUBLE_SWAP_LE_BE(gdouble in)
593{
594 union
595 {
596 guint64 i;
597 gdouble d;
598 } u;
599
600 u.d = in;
601 u.i = GUINT64_SWAP_LE_BE (u.i);
602 return u.d;
603}
604
605/**
606 * GDOUBLE_TO_LE: (skip)
607 * @val: value
608 *
609 * Convert 64-bit floating point value (double) from native byte order into
610 * little endian byte order.
611 */
612/**
613 * GDOUBLE_TO_BE: (skip)
614 * @val: value
615 *
616 * Convert 64-bit floating point value (double) from native byte order into
617 * big endian byte order.
618 */
619/**
620 * GDOUBLE_FROM_LE: (skip)
621 * @val: value
622 *
623 * Convert 64-bit floating point value (double) from little endian byte order
624 * into native byte order.
625 */
626/**
627 * GDOUBLE_FROM_BE: (skip)
628 * @val: value
629 *
630 * Convert 64-bit floating point value (double) from big endian byte order
631 * into native byte order.
632 */
633
634/**
635 * GFLOAT_TO_LE: (skip)
636 * @val: value
637 *
638 * Convert 32-bit floating point value (float) from native byte order into
639 * little endian byte order.
640 */
641/**
642 * GFLOAT_TO_BE: (skip)
643 * @val: value
644 *
645 * Convert 32-bit floating point value (float) from native byte order into
646 * big endian byte order.
647 */
648/**
649 * GFLOAT_FROM_LE: (skip)
650 * @val: value
651 *
652 * Convert 32-bit floating point value (float) from little endian byte order
653 * into native byte order.
654 */
655/**
656 * GFLOAT_FROM_BE: (skip)
657 * @val: value
658 *
659 * Convert 32-bit floating point value (float) from big endian byte order
660 * into native byte order.
661 */
662
663#if G_BYTE_ORDER == G_LITTLE_ENDIAN
664#define GFLOAT_TO_LE(val) ((gfloat) (val))
665#define GFLOAT_TO_BE(val) (GFLOAT_SWAP_LE_BE (val))
666#define GDOUBLE_TO_LE(val) ((gdouble) (val))
667#define GDOUBLE_TO_BE(val) (GDOUBLE_SWAP_LE_BE (val))
668
669#elif G_BYTE_ORDER == G_BIG_ENDIAN
670#define GFLOAT_TO_LE(val) (GFLOAT_SWAP_LE_BE (val))
671#define GFLOAT_TO_BE(val) ((gfloat) (val))
672#define GDOUBLE_TO_LE(val) (GDOUBLE_SWAP_LE_BE (val))
673#define GDOUBLE_TO_BE(val) ((gdouble) (val))
674
675#else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
676#error unknown ENDIAN type
677#endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
678
679#define GFLOAT_FROM_LE(val) (GFLOAT_TO_LE (val))
680#define GFLOAT_FROM_BE(val) (GFLOAT_TO_BE (val))
681#define GDOUBLE_FROM_LE(val) (GDOUBLE_TO_LE (val))
682#define GDOUBLE_FROM_BE(val) (GDOUBLE_TO_BE (val))
683
684#endif /* !defined(GFLOAT_FROM_LE) */
685
686#endif /* !__GI_SCANNER__ */
687
688/**
689 * GST_READ_FLOAT_LE:
690 * @data: memory location
691 *
692 * Read a 32 bit float value in little endian format from the memory buffer.
693 *
694 * Returns: The floating point value read from @data
695 */
696static inline gfloat
697GST_READ_FLOAT_LE(const guint8 *data)
698{
699 union
700 {
701 guint32 i;
702 gfloat f;
703 } u;
704
705 u.i = GST_READ_UINT32_LE (data);
706 return u.f;
707}
708
709/**
710 * GST_READ_FLOAT_BE:
711 * @data: memory location
712 *
713 * Read a 32 bit float value in big endian format from the memory buffer.
714 *
715 * Returns: The floating point value read from @data
716 */
717static inline gfloat
718GST_READ_FLOAT_BE(const guint8 *data)
719{
720 union
721 {
722 guint32 i;
723 gfloat f;
724 } u;
725
726 u.i = GST_READ_UINT32_BE (data);
727 return u.f;
728}
729
730/**
731 * GST_READ_DOUBLE_LE:
732 * @data: memory location
733 *
734 * Read a 64 bit double value in little endian format from the memory buffer.
735 *
736 * Returns: The double-precision floating point value read from @data
737 */
738static inline gdouble
739GST_READ_DOUBLE_LE(const guint8 *data)
740{
741 union
742 {
743 guint64 i;
744 gdouble d;
745 } u;
746
747 u.i = GST_READ_UINT64_LE (data);
748 return u.d;
749}
750
751/**
752 * GST_READ_DOUBLE_BE:
753 * @data: memory location
754 *
755 * Read a 64 bit double value in big endian format from the memory buffer.
756 *
757 * Returns: The double-precision floating point value read from @data
758 */
759static inline gdouble
760GST_READ_DOUBLE_BE(const guint8 *data)
761{
762 union
763 {
764 guint64 i;
765 gdouble d;
766 } u;
767
768 u.i = GST_READ_UINT64_BE (data);
769 return u.d;
770}
771
772/**
773 * GST_WRITE_FLOAT_LE:
774 * @data: memory location
775 * @num: value to store
776 *
777 * Store a 32 bit float value in little endian format into the memory buffer.
778 */
779static inline void
780GST_WRITE_FLOAT_LE(guint8 *data, gfloat num)
781{
782 union
783 {
784 guint32 i;
785 gfloat f;
786 } u;
787
788 u.f = num;
789 GST_WRITE_UINT32_LE (data, u.i);
790}
791
792/**
793 * GST_WRITE_FLOAT_BE:
794 * @data: memory location
795 * @num: value to store
796 *
797 * Store a 32 bit float value in big endian format into the memory buffer.
798 */
799static inline void
800GST_WRITE_FLOAT_BE(guint8 *data, gfloat num)
801{
802 union
803 {
804 guint32 i;
805 gfloat f;
806 } u;
807
808 u.f = num;
809 GST_WRITE_UINT32_BE (data, u.i);
810}
811
812/**
813 * GST_WRITE_DOUBLE_LE:
814 * @data: memory location
815 * @num: value to store
816 *
817 * Store a 64 bit double value in little endian format into the memory buffer.
818 */
819static inline void
820GST_WRITE_DOUBLE_LE(guint8 *data, gdouble num)
821{
822 union
823 {
824 guint64 i;
825 gdouble d;
826 } u;
827
828 u.d = num;
829 GST_WRITE_UINT64_LE (data, u.i);
830}
831
832/**
833 * GST_WRITE_DOUBLE_BE:
834 * @data: memory location
835 * @num: value to store
836 *
837 * Store a 64 bit double value in big endian format into the memory buffer.
838 */
839static inline void
840GST_WRITE_DOUBLE_BE(guint8 *data, gdouble num)
841{
842 union
843 {
844 guint64 i;
845 gdouble d;
846 } u;
847
848 u.d = num;
849 GST_WRITE_UINT64_BE (data, u.i);
850}
851
852/* Miscellaneous utility macros */
853
854/**
855 * GST_ROUND_UP_2:
856 * @num: integer value to round up
857 *
858 * Rounds an integer value up to the next multiple of 2.
859 */
860#define GST_ROUND_UP_2(num) (((num)+1)&~1)
861/**
862 * GST_ROUND_UP_4:
863 * @num: integer value to round up
864 *
865 * Rounds an integer value up to the next multiple of 4.
866 */
867#define GST_ROUND_UP_4(num) (((num)+3)&~3)
868/**
869 * GST_ROUND_UP_8:
870 * @num: integer value to round up
871 *
872 * Rounds an integer value up to the next multiple of 8.
873 */
874#define GST_ROUND_UP_8(num) (((num)+7)&~7)
875/**
876 * GST_ROUND_UP_16:
877 * @num: integer value to round up
878 *
879 * Rounds an integer value up to the next multiple of 16.
880 */
881#define GST_ROUND_UP_16(num) (((num)+15)&~15)
882/**
883 * GST_ROUND_UP_32:
884 * @num: integer value to round up
885 *
886 * Rounds an integer value up to the next multiple of 32.
887 */
888#define GST_ROUND_UP_32(num) (((num)+31)&~31)
889/**
890 * GST_ROUND_UP_64:
891 * @num: integer value to round up
892 *
893 * Rounds an integer value up to the next multiple of 64.
894 */
895#define GST_ROUND_UP_64(num) (((num)+63)&~63)
896/**
897 * GST_ROUND_UP_128:
898 * @num: integer value to round up
899 *
900 * Rounds an integer value up to the next multiple of 128.
901 * Since: 1.4
902 */
903#define GST_ROUND_UP_128(num) (((num)+127)&~127)
904/**
905 * GST_ROUND_UP_N:
906 * @num: integrer value to round up
907 * @align: a power of two to round up to
908 *
909 * Rounds an integer value up to the next multiple of @align. @align MUST be a
910 * power of two.
911 */
912#define GST_ROUND_UP_N(num,align) ((((num) + ((align) - 1)) & ~((align) - 1)))
913
914
915/**
916 * GST_ROUND_DOWN_2:
917 * @num: integer value to round down
918 *
919 * Rounds an integer value down to the next multiple of 2.
920 */
921#define GST_ROUND_DOWN_2(num) ((num)&(~1))
922/**
923 * GST_ROUND_DOWN_4:
924 * @num: integer value to round down
925 *
926 * Rounds an integer value down to the next multiple of 4.
927 */
928#define GST_ROUND_DOWN_4(num) ((num)&(~3))
929/**
930 * GST_ROUND_DOWN_8:
931 * @num: integer value to round down
932 *
933 * Rounds an integer value down to the next multiple of 8.
934 */
935#define GST_ROUND_DOWN_8(num) ((num)&(~7))
936/**
937 * GST_ROUND_DOWN_16:
938 * @num: integer value to round down
939 *
940 * Rounds an integer value down to the next multiple of 16.
941 */
942#define GST_ROUND_DOWN_16(num) ((num)&(~15))
943/**
944 * GST_ROUND_DOWN_32:
945 * @num: integer value to round down
946 *
947 * Rounds an integer value down to the next multiple of 32.
948 */
949#define GST_ROUND_DOWN_32(num) ((num)&(~31))
950/**
951 * GST_ROUND_DOWN_64:
952 * @num: integer value to round down
953 *
954 * Rounds an integer value down to the next multiple of 64.
955 */
956#define GST_ROUND_DOWN_64(num) ((num)&(~63))
957/**
958 * GST_ROUND_DOWN_128:
959 * @num: integer value to round down
960 *
961 * Rounds an integer value down to the next multiple of 128.
962 * Since: 1.4
963 */
964#define GST_ROUND_DOWN_128(num) ((num)&(~127))
965/**
966 * GST_ROUND_DOWN_N:
967 * @num: integrer value to round down
968 * @align: a power of two to round down to
969 *
970 * Rounds an integer value down to the next multiple of @align. @align MUST be a
971 * power of two.
972 */
973#define GST_ROUND_DOWN_N(num,align) (((num) & ~((align) - 1)))
974
975
976GST_API
977void gst_object_default_error (GstObject * source,
978 const GError * error,
979 const gchar * debug);
980
981/* element functions */
982
983GST_API
984void gst_element_create_all_pads (GstElement *element);
985
986GST_API
987GstPad* gst_element_get_compatible_pad (GstElement *element, GstPad *pad,
988 GstCaps *caps);
989GST_API
990GstPadTemplate* gst_element_get_compatible_pad_template (GstElement *element, GstPadTemplate *compattempl);
991
992GST_API
993const gchar* gst_element_state_get_name (GstState state);
994
995GST_API
996const gchar * gst_element_state_change_return_get_name (GstStateChangeReturn state_ret);
997
998GST_API
999const gchar * gst_state_change_get_name (GstStateChange transition);
1000
1001GST_API
1002gboolean gst_element_link (GstElement *src, GstElement *dest);
1003
1004GST_API
1005gboolean gst_element_link_many (GstElement *element_1,
1006 GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
1007GST_API
1008gboolean gst_element_link_filtered (GstElement * src,
1009 GstElement * dest,
1010 GstCaps *filter);
1011GST_API
1012void gst_element_unlink (GstElement *src, GstElement *dest);
1013
1014GST_API
1015void gst_element_unlink_many (GstElement *element_1,
1016 GstElement *element_2, ...) G_GNUC_NULL_TERMINATED;
1017GST_API
1018gboolean gst_element_link_pads (GstElement *src, const gchar *srcpadname,
1019 GstElement *dest, const gchar *destpadname);
1020GST_API
1021gboolean gst_element_link_pads_full (GstElement *src, const gchar *srcpadname,
1022 GstElement *dest, const gchar *destpadname,
1023 GstPadLinkCheck flags);
1024GST_API
1025void gst_element_unlink_pads (GstElement *src, const gchar *srcpadname,
1026 GstElement *dest, const gchar *destpadname);
1027GST_API
1028gboolean gst_element_link_pads_filtered (GstElement * src, const gchar * srcpadname,
1029 GstElement * dest, const gchar * destpadname,
1030 GstCaps *filter);
1031GST_API
1032gboolean gst_element_seek_simple (GstElement *element,
1033 GstFormat format,
1034 GstSeekFlags seek_flags,
1035 gint64 seek_pos);
1036
1037/* util elementfactory functions */
1038
1039GST_API
1040gboolean gst_element_factory_can_sink_all_caps (GstElementFactory *factory, const GstCaps *caps);
1041
1042GST_API
1043gboolean gst_element_factory_can_src_all_caps (GstElementFactory *factory, const GstCaps *caps);
1044
1045GST_API
1046gboolean gst_element_factory_can_sink_any_caps (GstElementFactory *factory, const GstCaps *caps);
1047
1048GST_API
1049gboolean gst_element_factory_can_src_any_caps (GstElementFactory *factory, const GstCaps *caps);
1050
1051/* util query functions */
1052
1053GST_API
1054gboolean gst_element_query_position (GstElement *element, GstFormat format, gint64 *cur);
1055
1056GST_API
1057gboolean gst_element_query_duration (GstElement *element, GstFormat format, gint64 *duration);
1058
1059GST_API
1060gboolean gst_element_query_convert (GstElement *element, GstFormat src_format, gint64 src_val,
1061 GstFormat dest_format, gint64 *dest_val);
1062
1063/* pad functions */
1064
1065GST_API
1066void gst_pad_use_fixed_caps (GstPad *pad);
1067
1068GST_API
1069GstElement* gst_pad_get_parent_element (GstPad *pad);
1070
1071/* util query functions */
1072
1073GST_API
1074gboolean gst_pad_proxy_query_accept_caps (GstPad *pad, GstQuery *query);
1075
1076GST_API
1077gboolean gst_pad_proxy_query_caps (GstPad *pad, GstQuery *query);
1078
1079GST_API
1080gboolean gst_pad_query_position (GstPad *pad, GstFormat format, gint64 *cur);
1081
1082GST_API
1083gboolean gst_pad_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
1084
1085GST_API
1086gboolean gst_pad_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
1087 GstFormat dest_format, gint64 *dest_val);
1088GST_API
1089GstCaps * gst_pad_query_caps (GstPad *pad, GstCaps *filter);
1090
1091GST_API
1092gboolean gst_pad_query_accept_caps (GstPad *pad, GstCaps *caps);
1093
1094GST_API
1095gboolean gst_pad_link_maybe_ghosting (GstPad *src,
1096 GstPad *sink);
1097GST_API
1098gboolean gst_pad_link_maybe_ghosting_full (GstPad *src,
1099 GstPad *sink,
1100 GstPadLinkCheck flags);
1101GST_API
1102gboolean gst_pad_peer_query_position (GstPad *pad, GstFormat format, gint64 *cur);
1103
1104GST_API
1105gboolean gst_pad_peer_query_duration (GstPad *pad, GstFormat format, gint64 *duration);
1106
1107GST_API
1108gboolean gst_pad_peer_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val,
1109 GstFormat dest_format, gint64 *dest_val);
1110GST_API
1111GstCaps * gst_pad_peer_query_caps (GstPad * pad, GstCaps *filter);
1112
1113GST_API
1114gboolean gst_pad_peer_query_accept_caps (GstPad * pad, GstCaps *caps);
1115
1116GST_API
1117gchar * gst_pad_create_stream_id (GstPad * pad, GstElement * parent, const gchar *stream_id) G_GNUC_MALLOC;
1118
1119GST_API
1120gchar * gst_pad_create_stream_id_printf (GstPad * pad, GstElement * parent, const gchar *stream_id, ...) G_GNUC_PRINTF (3, 4) G_GNUC_MALLOC;
1121
1122GST_API
1123gchar * 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;
1124
1125GST_API
1126gchar * gst_pad_get_stream_id (GstPad * pad);
1127
1128GST_API
1129GstStream * gst_pad_get_stream (GstPad * pad);
1130
1131/* bin functions */
1132
1133GST_API
1134void gst_bin_add_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
1135
1136GST_API
1137void gst_bin_remove_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED;
1138
1139GST_API
1140GstPad * gst_bin_find_unlinked_pad (GstBin *bin, GstPadDirection direction);
1141
1142GST_API
1143gboolean gst_bin_sync_children_states (GstBin *bin);
1144
1145/* parse utility functions */
1146
1147GST_API
1148GstElement * gst_parse_bin_from_description (const gchar * bin_description,
1149 gboolean ghost_unlinked_pads,
1150 GError ** err);
1151GST_API
1152GstElement * gst_parse_bin_from_description_full (const gchar * bin_description,
1153 gboolean ghost_unlinked_pads,
1154 GstParseContext * context,
1155 GstParseFlags flags,
1156 GError ** err);
1157GST_API
1158GstClockTime gst_util_get_timestamp (void);
1159
1160/**
1161 * GstSearchMode:
1162 * @GST_SEARCH_MODE_EXACT : Only search for exact matches.
1163 * @GST_SEARCH_MODE_BEFORE: Search for an exact match or the element just before.
1164 * @GST_SEARCH_MODE_AFTER : Search for an exact match or the element just after.
1165 *
1166 * The different search modes.
1167 */
1168typedef enum {
1169 GST_SEARCH_MODE_EXACT = 0,
1170 GST_SEARCH_MODE_BEFORE,
1171 GST_SEARCH_MODE_AFTER
1172} GstSearchMode;
1173
1174/**
1175 * GstPluginAPIFlags:
1176 * @GST_PLUGIN_API_FLAG_IGNORE_ENUM_MEMBERS: Ignore enum members when generating
1177 * the plugins cache. This is useful if the members of the enum are generated
1178 * dynamically, in order not to expose incorrect documentation to the end user.
1179 *
1180 * Since: 1.18
1181 */
1182typedef enum {
1183 GST_PLUGIN_API_FLAG_IGNORE_ENUM_MEMBERS = (1 << 0),
1184} GstPluginAPIFlags;
1185
1186GST_API
1187gpointer gst_util_array_binary_search (gpointer array, guint num_elements,
1188 gsize element_size, GCompareDataFunc search_func,
1189 GstSearchMode mode, gconstpointer search_data,
1190 gpointer user_data);
1191
1192/* fraction operations */
1193
1194GST_API
1195gint gst_util_greatest_common_divisor (gint a, gint b);
1196
1197GST_API
1198gint64 gst_util_greatest_common_divisor_int64 (gint64 a, gint64 b);
1199
1200GST_API
1201void gst_util_fraction_to_double (gint src_n, gint src_d, gdouble *dest);
1202
1203GST_API
1204void gst_util_double_to_fraction (gdouble src, gint *dest_n, gint *dest_d);
1205
1206GST_API
1207gboolean gst_util_fraction_multiply (gint a_n, gint a_d, gint b_n, gint b_d,
1208 gint *res_n, gint *res_d);
1209GST_API
1210gboolean gst_util_fraction_add (gint a_n, gint a_d, gint b_n, gint b_d,
1211 gint *res_n, gint *res_d);
1212GST_API
1213gint gst_util_fraction_compare (gint a_n, gint a_d, gint b_n, gint b_d);
1214
1215GST_API
1216gboolean gst_calculate_linear_regression (const GstClockTime * xy,
1217 GstClockTime * temp, guint n,
1218 GstClockTime * m_num, GstClockTime * m_denom,
1219 GstClockTime * b, GstClockTime * xbase,
1220 gdouble * r_squared);
1221
1222GST_API
1223void gst_type_mark_as_plugin_api (GType type, GstPluginAPIFlags flags);
1224
1225GST_API
1226gboolean gst_type_is_plugin_api (GType type, GstPluginAPIFlags *flags);
1227
1228G_END_DECLS
1229
1230#endif /* __GST_UTILS_H__ */
1231

source code of include/gstreamer-1.0/gst/gstutils.h