1 /* GStreamer 2 * Copyright (C) <2003> David A. Schleef <ds@schleef.org> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public 15 * License along with this library; if not, write to the 16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20 #ifndef __GST_VALUE_H__ 21 #define __GST_VALUE_H__ 22 23 #include <gst/gstconfig.h> 24 #include <gst/gstcaps.h> 25 #include <gst/gststructure.h> 26 #include <gst/gstcapsfeatures.h> 27 28 G_BEGIN_DECLS 29 30 /** 31 * GST_MAKE_FOURCC: 32 * @a: the first character 33 * @b: the second character 34 * @c: the third character 35 * @d: the fourth character 36 * 37 * Transform four characters into a #guint32 fourcc value with host 38 * endianness. 39 * 40 * |[ 41 * guint32 fourcc = GST_MAKE_FOURCC ('M', 'J', 'P', 'G'); 42 * ]| 43 * 44 */ 45 #define GST_MAKE_FOURCC(a,b,c,d) \ 46 ( (guint32)(a) | ((guint32) (b)) << 8 | ((guint32) (c)) << 16 | ((guint32) (d)) << 24 ) 47 48 /** 49 * GST_STR_FOURCC: 50 * @f: a string with at least four characters 51 * 52 * Transform an input string into a #guint32 fourcc value with host 53 * endianness. 54 * Caller is responsible for ensuring the input string consists of at least 55 * four characters. 56 * 57 * |[ 58 * guint32 fourcc = GST_STR_FOURCC ("MJPG"); 59 * ]| 60 * 61 */ 62 #define GST_STR_FOURCC(f) ((guint32)(((f)[0])|((f)[1]<<8)|((f)[2]<<16)|((f)[3]<<24))) 63 64 /** 65 * GST_FOURCC_FORMAT: (skip): 66 * 67 * Can be used together with #GST_FOURCC_ARGS to properly output a 68 * #guint32 fourcc value in a printf\()-style text message. 69 * 70 * |[ 71 * printf ("fourcc: %" GST_FOURCC_FORMAT "\n", GST_FOURCC_ARGS (fcc)); 72 * ]| 73 * 74 */ 75 #define GST_FOURCC_FORMAT "c%c%c%c" 76 77 /** 78 * GST_FOURCC_ARGS: (skip): 79 * @fourcc: a #guint32 fourcc value to output 80 * 81 * Can be used together with #GST_FOURCC_FORMAT to properly output a 82 * #guint32 fourcc value in a printf\()-style text message. 83 */ 84 85 #define __GST_PRINT_CHAR(c) \ 86 g_ascii_isprint(c) ? (c) : '.' 87 #define GST_FOURCC_ARGS(fourcc) \ 88 __GST_PRINT_CHAR((fourcc) & 0xff), \ 89 __GST_PRINT_CHAR(((fourcc) >> 8) & 0xff), \ 90 __GST_PRINT_CHAR(((fourcc) >> 16) & 0xff), \ 91 __GST_PRINT_CHAR(((fourcc) >> 24) & 0xff) 92 /** 93 * GST_VALUE_HOLDS_INT_RANGE: 94 * @x: the #GValue to check 95 * 96 * Checks if the given #GValue contains a #GstIntRange value. 97 */ 98 #define GST_VALUE_HOLDS_INT_RANGE(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_int_range_type) 99 100 /** 101 * GST_VALUE_HOLDS_INT64_RANGE: 102 * @x: the #GValue to check 103 * 104 * Checks if the given #GValue contains a #GstInt64Range value. 105 */ 106 #define GST_VALUE_HOLDS_INT64_RANGE(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_int64_range_type) 107 108 /** 109 * GST_VALUE_HOLDS_DOUBLE_RANGE: 110 * @x: the #GValue to check 111 * 112 * Checks if the given #GValue contains a #GstDoubleRange value. 113 */ 114 #define GST_VALUE_HOLDS_DOUBLE_RANGE(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_double_range_type) 115 116 /** 117 * GST_VALUE_HOLDS_FRACTION_RANGE: 118 * @x: the #GValue to check 119 * 120 * Checks if the given #GValue contains a #GstFractionRange value. 121 */ 122 #define GST_VALUE_HOLDS_FRACTION_RANGE(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_fraction_range_type) 123 124 /** 125 * GST_VALUE_HOLDS_LIST: 126 * @x: the #GValue to check 127 * 128 * Checks if the given #GValue contains a #GstValueList value. 129 */ 130 #define GST_VALUE_HOLDS_LIST(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_value_list_type) 131 132 /** 133 * GST_VALUE_HOLDS_ARRAY: 134 * @x: the #GValue to check 135 * 136 * Checks if the given #GValue contains a #GstValueArray value. 137 */ 138 #define GST_VALUE_HOLDS_ARRAY(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_value_array_type) 139 140 /** 141 * GST_VALUE_HOLDS_CAPS: 142 * @x: the #GValue to check 143 * 144 * Checks if the given #GValue contains a #GstCaps value. 145 */ 146 #define GST_VALUE_HOLDS_CAPS(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_caps_type) 147 148 /** 149 * GST_VALUE_HOLDS_STRUCTURE: 150 * @x: the #GValue to check 151 * 152 * Checks if the given #GValue contains a #GstStructure value. 153 */ 154 #define GST_VALUE_HOLDS_STRUCTURE(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_structure_type) 155 156 /** 157 * GST_VALUE_HOLDS_CAPS_FEATURES: 158 * @x: the #GValue to check 159 * 160 * Checks if the given #GValue contains a #GstCapsFeatures value. 161 */ 162 #define GST_VALUE_HOLDS_CAPS_FEATURES(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_caps_features_type) 163 164 /** 165 * GST_VALUE_HOLDS_BUFFER: 166 * @x: the #GValue to check 167 * 168 * Checks if the given #GValue contains a #GstBuffer value. 169 */ 170 #define GST_VALUE_HOLDS_BUFFER(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_buffer_type) 171 172 /** 173 * GST_VALUE_HOLDS_SAMPLE: 174 * @x: the #GValue to check 175 * 176 * Checks if the given #GValue contains a #GstSample value. 177 */ 178 #define GST_VALUE_HOLDS_SAMPLE(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_sample_type) 179 180 /** 181 * GST_VALUE_HOLDS_FRACTION: 182 * @x: the #GValue to check 183 * 184 * Checks if the given #GValue contains a #GstFraction value. 185 */ 186 #define GST_VALUE_HOLDS_FRACTION(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_fraction_type) 187 188 /** 189 * GST_VALUE_HOLDS_DATE_TIME: 190 * @x: the #GValue to check 191 * 192 * Checks if the given #GValue contains a #GstDateTime value. 193 */ 194 #define GST_VALUE_HOLDS_DATE_TIME(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_date_time_type) 195 196 /** 197 * GST_VALUE_HOLDS_BITMASK: 198 * @x: the #GValue to check 199 * 200 * Checks if the given #GValue contains a #GstBitmask value. 201 */ 202 #define GST_VALUE_HOLDS_BITMASK(x) ((gpointer)(x) != NULL && G_VALUE_TYPE(x) == _gst_bitmask_type) 203 204 /** 205 * GST_VALUE_HOLDS_FLAG_SET: 206 * @x: the #GValue to check 207 * 208 * Checks if the given #GValue contains a #GstFlagSet value. 209 * 210 * Since: 1.6 211 */ 212 #define GST_VALUE_HOLDS_FLAG_SET(x) (G_TYPE_FUNDAMENTAL (G_VALUE_TYPE ((x))) == GST_TYPE_FLAG_SET) 213 214 /** 215 * GST_FLAG_SET_MASK_EXACT: (value 4294967295) (type guint) 216 * 217 * A mask value with all bits set, for use as a 218 * GstFlagSet mask where all flag bits must match 219 * exactly 220 * 221 * Since: 1.6 222 */ 223 #define GST_FLAG_SET_MASK_EXACT ((guint)(-1)) 224 225 GST_API GType _gst_int_range_type; 226 227 /** 228 * GstIntRange: 229 * 230 * A fundamental type that describes a #gint range 231 */ 232 233 /** 234 * GST_TYPE_INT_RANGE: 235 * 236 * a #GValue type that represents an integer range 237 * 238 * Returns: the #GType of GstIntRange 239 */ 240 #define GST_TYPE_INT_RANGE (_gst_int_range_type) 241 242 GST_API GType _gst_int64_range_type; 243 244 /** 245 * GstInt64Range: 246 * 247 * A fundamental type that describes a #gint64 range 248 */ 249 250 /** 251 * GST_TYPE_INT64_RANGE: 252 * 253 * a #GValue type that represents an #gint64 range 254 * 255 * Returns: the #GType of GstInt64Range 256 */ 257 #define GST_TYPE_INT64_RANGE (_gst_int64_range_type) 258 259 GST_API GType _gst_double_range_type; 260 261 /** 262 * GstDoubleRange: 263 * 264 * A fundamental type that describes a #gdouble range 265 */ 266 267 /** 268 * GST_TYPE_DOUBLE_RANGE: 269 * 270 * a #GValue type that represents a floating point range with double precision 271 * 272 * Returns: the #GType of GstIntRange 273 */ 274 #define GST_TYPE_DOUBLE_RANGE (_gst_double_range_type) 275 276 GST_API GType _gst_fraction_range_type; 277 278 /** 279 * GstFractionRange: 280 * 281 * A fundamental type that describes a #GstFractionRange range 282 */ 283 284 /** 285 * GST_TYPE_FRACTION_RANGE: 286 * 287 * a #GValue type that represents a GstFraction range 288 * 289 * Returns: the #GType of GstFractionRange 290 */ 291 #define GST_TYPE_FRACTION_RANGE (_gst_fraction_range_type) 292 293 GST_API GType _gst_value_list_type; 294 295 /** 296 * GstValueList: 297 * 298 * A fundamental type that describes an unordered list of #GValue 299 */ 300 301 /** 302 * GST_TYPE_LIST: 303 * 304 * a #GValue type that represents an unordered list of #GValue values. This 305 * is used for example to express a list of possible values for a field in 306 * a caps structure, like a list of possible sample rates, of which only one 307 * will be chosen in the end. This means that all values in the list are 308 * meaningful on their own. 309 * 310 * Returns: the #GType of GstValueList (which is not explicitly typed) 311 */ 312 #define GST_TYPE_LIST (_gst_value_list_type) 313 314 GST_API GType _gst_value_array_type; 315 316 /** 317 * GstValueArray: 318 * 319 * A fundamental type that describes an ordered list of #GValue 320 */ 321 322 /** 323 * GST_TYPE_ARRAY: 324 * 325 * a #GValue type that represents an ordered list of #GValue values. This is 326 * used to express a set of values that is meaningful only in their specific 327 * combination and order of values. Each value on its own is not particularly 328 * meaningful, only the ordered array in its entirety is meaningful. This is 329 * used for example to express channel layouts for multichannel audio where 330 * each channel needs to be mapped to a position in the room. 331 * 332 * Returns: the #GType of GstArrayList (which is not explicitly typed) 333 */ 334 #define GST_TYPE_ARRAY (_gst_value_array_type) 335 336 GST_API GType _gst_fraction_type; 337 338 /** 339 * GstFraction: 340 * 341 * A fundamental type that describes a fraction of an integer numerator 342 * over an integer denominator 343 */ 344 345 /** 346 * GST_TYPE_FRACTION: 347 * 348 * a #GValue type that represents a fraction of an integer numerator over 349 * an integer denominator 350 * 351 * Returns: the #GType of GstFraction (which is not explicitly typed) 352 */ 353 354 #define GST_TYPE_FRACTION (_gst_fraction_type) 355 356 GST_API GType _gst_bitmask_type; 357 358 /** 359 * GstBitmask: 360 * 361 * A fundamental type that describes a 64-bit bitmask 362 */ 363 364 /** 365 * GST_TYPE_BITMASK: 366 * 367 * a #GValue type that represents a 64-bit bitmask. 368 * 369 * Returns: the #GType of GstBitmask (which is not explicitly typed) 370 */ 371 372 #define GST_TYPE_BITMASK (_gst_bitmask_type) 373 374 GST_API GType _gst_flagset_type; 375 376 /** 377 * GstFlagSet: 378 * 379 * A fundamental type that describes a 32-bit flag bitfield, with 32-bit 380 * mask indicating which of the bits in the field are explicitly set. 381 */ 382 383 /** 384 * GST_TYPE_FLAG_SET: 385 * 386 * a #GValue type that represents a 32-bit flag bitfield, with 32-bit 387 * mask indicating which of the bits in the field are explicitly set. 388 * Useful for negotiation. 389 * 390 * Returns: the #GType of GstFlags (which is not explicitly typed) 391 * 392 * Since: 1.6 393 */ 394 #define GST_TYPE_FLAG_SET (_gst_flagset_type) 395 396 /** 397 * GST_TYPE_G_THREAD: 398 * 399 * a boxed #GValue type for #GThread that represents a thread. 400 * 401 * Returns: the #GType of GstGThread 402 */ 403 404 #define GST_TYPE_G_THREAD gst_g_thread_get_type () 405 406 /** 407 * GST_VALUE_LESS_THAN: 408 * 409 * Indicates that the first value provided to a comparison function 410 * (gst_value_compare()) is lesser than the second one. 411 */ 412 #define GST_VALUE_LESS_THAN (-1) 413 414 /** 415 * GST_VALUE_EQUAL: 416 * 417 * Indicates that the first value provided to a comparison function 418 * (gst_value_compare()) is equal to the second one. 419 */ 420 #define GST_VALUE_EQUAL 0 421 422 /** 423 * GST_VALUE_GREATER_THAN: 424 * 425 * Indicates that the first value provided to a comparison function 426 * (gst_value_compare()) is greater than the second one. 427 */ 428 #define GST_VALUE_GREATER_THAN 1 429 430 /** 431 * GST_VALUE_UNORDERED: 432 * 433 * Indicates that the comparison function (gst_value_compare()) can not 434 * determine a order for the two provided values. 435 */ 436 #define GST_VALUE_UNORDERED 2 437 438 /** 439 * GstValueCompareFunc: 440 * @value1: first value for comparison 441 * @value2: second value for comparison 442 * 443 * Used together with gst_value_compare() to compare #GValue items. 444 * 445 * Returns: one of GST_VALUE_LESS_THAN, GST_VALUE_EQUAL, GST_VALUE_GREATER_THAN 446 * or GST_VALUE_UNORDERED 447 */ 448 typedef gint (* GstValueCompareFunc) (const GValue *value1, 449 const GValue *value2); 450 451 /** 452 * GstValueSerializeFunc: 453 * @value1: a #GValue 454 * 455 * Used by gst_value_serialize() to obtain a non-binary form of the #GValue. 456 * 457 * Free-function: g_free 458 * 459 * Returns: (transfer full): the string representation of the value 460 */ 461 typedef gchar * (* GstValueSerializeFunc) (const GValue *value1); 462 463 /** 464 * GstValueDeserializeFunc: 465 * @dest: a #GValue 466 * @s: a string 467 * 468 * Used by gst_value_deserialize() to parse a non-binary form into the #GValue. 469 * 470 * Returns: %TRUE for success 471 */ 472 typedef gboolean (* GstValueDeserializeFunc) (GValue *dest, 473 const gchar *s); 474 475 /** 476 * GstValueDeserializeWithPSpecFunc: 477 * @dest: a #GValue 478 * @s: a string 479 * @pspec: a #GParamSpec describing the expected value 480 * 481 * Used by gst_value_deserialize_with_pspec() to parse a non-binary form into the #GValue. 482 * 483 * Returns: %TRUE for success 484 * Since: 1.20 485 */ 486 typedef gboolean (* GstValueDeserializeWithPSpecFunc) (GValue *dest, 487 const gchar *s, 488 GParamSpec *pspec); 489 490 491 typedef struct _GstValueTable GstValueTable; 492 /** 493 * GstValueTable: 494 * @type: a #GType 495 * @compare: a #GstValueCompareFunc 496 * @serialize: a #GstValueSerializeFunc 497 * @deserialize: a #GstValueDeserializeFunc 498 * @deserialize_with_pspec: a #GstValueDeserializeWithPSpecFunc 499 * 500 * VTable for the #GValue @type. 501 */ 502 struct _GstValueTable { 503 GType type; 504 GstValueCompareFunc compare; 505 GstValueSerializeFunc serialize; 506 GstValueDeserializeFunc deserialize; 507 508 /** 509 * GstValueTable.deserialize_with_pspec: 510 * 511 * a #GstValueDeserializeWithPSpecFunc 512 * 513 * Since: 1.20 514 */ 515 GstValueDeserializeWithPSpecFunc deserialize_with_pspec; 516 517 /*< private >*/ 518 gpointer _gst_reserved [GST_PADDING - 1]; 519 }; 520 521 GST_API 522 GType gst_int_range_get_type (void); 523 524 GST_API 525 GType gst_int64_range_get_type (void); 526 527 GST_API 528 GType gst_double_range_get_type (void); 529 530 GST_API 531 GType gst_fraction_range_get_type (void); 532 533 GST_API 534 GType gst_fraction_get_type (void); 535 536 GST_API 537 GType gst_value_list_get_type (void); 538 539 GST_API 540 GType gst_value_array_get_type (void); 541 542 GST_API 543 GType gst_bitmask_get_type (void); 544 545 GST_API 546 GType gst_flagset_get_type (void); 547 548 /* Hide this compatibility type from introspection */ 549 #ifndef __GI_SCANNER__ 550 GST_API 551 GType gst_g_thread_get_type (void); 552 #endif 553 554 GST_API 555 void gst_value_register (const GstValueTable *table); 556 557 GST_API 558 void gst_value_init_and_copy (GValue *dest, 559 const GValue *src); 560 GST_API 561 gchar * gst_value_serialize (const GValue *value) G_GNUC_MALLOC; 562 563 GST_API 564 gboolean gst_value_deserialize (GValue *dest, 565 const gchar *src); 566 567 GST_API 568 gboolean gst_value_deserialize_with_pspec (GValue *dest, 569 const gchar *src, 570 GParamSpec *pspec); 571 572 /* list */ 573 574 GST_API 575 void gst_value_list_append_value (GValue *value, 576 const GValue *append_value); 577 GST_API 578 void gst_value_list_append_and_take_value (GValue *value, 579 GValue *append_value); 580 GST_API 581 void gst_value_list_prepend_value (GValue *value, 582 const GValue *prepend_value); 583 GST_API 584 void gst_value_list_concat (GValue *dest, 585 const GValue *value1, 586 const GValue *value2); 587 GST_API 588 void gst_value_list_merge (GValue *dest, 589 const GValue *value1, 590 const GValue *value2); 591 GST_API 592 guint gst_value_list_get_size (const GValue *value); 593 594 GST_API 595 const GValue * gst_value_list_get_value (const GValue *value, 596 guint index); 597 598 GST_API 599 GValue * gst_value_list_init (GValue *value, 600 guint prealloc); 601 /* array */ 602 603 GST_API 604 void gst_value_array_append_value (GValue *value, 605 const GValue *append_value); 606 GST_API 607 void gst_value_array_append_and_take_value (GValue *value, 608 GValue *append_value); 609 GST_API 610 void gst_value_array_prepend_value (GValue *value, 611 const GValue *prepend_value); 612 GST_API 613 guint gst_value_array_get_size (const GValue *value); 614 615 GST_API 616 const GValue * gst_value_array_get_value (const GValue *value, 617 guint index); 618 GST_API 619 GValue * gst_value_array_init (GValue *value, 620 guint prealloc); 621 622 /* int range */ 623 624 GST_API 625 void gst_value_set_int_range (GValue *value, 626 gint start, 627 gint end); 628 GST_API 629 void gst_value_set_int_range_step (GValue *value, 630 gint start, 631 gint end, 632 gint step); 633 GST_API 634 gint gst_value_get_int_range_min (const GValue *value); 635 636 GST_API 637 gint gst_value_get_int_range_max (const GValue *value); 638 639 GST_API 640 gint gst_value_get_int_range_step (const GValue *value); 641 642 /* int64 range */ 643 644 GST_API 645 void gst_value_set_int64_range (GValue *value, 646 gint64 start, 647 gint64 end); 648 GST_API 649 void gst_value_set_int64_range_step (GValue *value, 650 gint64 start, 651 gint64 end, 652 gint64 step); 653 GST_API 654 gint64 gst_value_get_int64_range_min (const GValue *value); 655 656 GST_API 657 gint64 gst_value_get_int64_range_max (const GValue *value); 658 659 GST_API 660 gint64 gst_value_get_int64_range_step (const GValue *value); 661 662 /* double range */ 663 664 GST_API 665 void gst_value_set_double_range (GValue *value, 666 gdouble start, 667 gdouble end); 668 GST_API 669 gdouble gst_value_get_double_range_min (const GValue *value); 670 671 GST_API 672 gdouble gst_value_get_double_range_max (const GValue *value); 673 674 /* caps */ 675 676 GST_API 677 const GstCaps * gst_value_get_caps (const GValue *value); 678 679 GST_API 680 void gst_value_set_caps (GValue *value, 681 const GstCaps *caps); 682 683 /* structure */ 684 685 GST_API 686 const GstStructure * 687 gst_value_get_structure (const GValue *value); 688 689 GST_API 690 void gst_value_set_structure (GValue *value, 691 const GstStructure *structure); 692 693 /* caps features */ 694 695 GST_API 696 const GstCapsFeatures * 697 gst_value_get_caps_features (const GValue *value); 698 699 GST_API 700 void gst_value_set_caps_features (GValue *value, 701 const GstCapsFeatures *features); 702 703 /* fraction */ 704 705 GST_API 706 void gst_value_set_fraction (GValue *value, 707 gint numerator, 708 gint denominator); 709 GST_API 710 gint gst_value_get_fraction_numerator (const GValue *value); 711 712 GST_API 713 gint gst_value_get_fraction_denominator (const GValue *value); 714 715 GST_API 716 gboolean gst_value_fraction_multiply (GValue *product, 717 const GValue *factor1, 718 const GValue *factor2); 719 GST_API 720 gboolean gst_value_fraction_subtract (GValue * dest, 721 const GValue * minuend, 722 const GValue * subtrahend); 723 724 /* fraction range */ 725 726 GST_API 727 void gst_value_set_fraction_range (GValue *value, 728 const GValue *start, 729 const GValue *end); 730 GST_API 731 void gst_value_set_fraction_range_full (GValue *value, 732 gint numerator_start, 733 gint denominator_start, 734 gint numerator_end, 735 gint denominator_end); 736 GST_API 737 const GValue *gst_value_get_fraction_range_min (const GValue *value); 738 739 GST_API 740 const GValue *gst_value_get_fraction_range_max (const GValue *value); 741 742 /* bitmask */ 743 744 GST_API 745 guint64 gst_value_get_bitmask (const GValue *value); 746 747 GST_API 748 void gst_value_set_bitmask (GValue *value, 749 guint64 bitmask); 750 /* flagset */ 751 752 GST_API 753 void gst_value_set_flagset (GValue * value, guint flags, guint mask); 754 755 GST_API 756 guint gst_value_get_flagset_flags (const GValue * value); 757 758 GST_API 759 guint gst_value_get_flagset_mask (const GValue * value); 760 761 /* compare */ 762 763 GST_API 764 gint gst_value_compare (const GValue *value1, 765 const GValue *value2); 766 GST_API 767 gboolean gst_value_can_compare (const GValue *value1, 768 const GValue *value2); 769 GST_API 770 gboolean gst_value_is_subset (const GValue *value1, 771 const GValue *value2); 772 773 /* union */ 774 775 GST_API 776 gboolean gst_value_union (GValue *dest, 777 const GValue *value1, 778 const GValue *value2); 779 GST_API 780 gboolean gst_value_can_union (const GValue *value1, 781 const GValue *value2); 782 783 /* intersection */ 784 785 GST_API 786 gboolean gst_value_intersect (GValue *dest, 787 const GValue *value1, 788 const GValue *value2); 789 GST_API 790 gboolean gst_value_can_intersect (const GValue *value1, 791 const GValue *value2); 792 793 /* subtraction */ 794 795 GST_API 796 gboolean gst_value_subtract (GValue *dest, 797 const GValue *minuend, 798 const GValue *subtrahend); 799 GST_API 800 gboolean gst_value_can_subtract (const GValue *minuend, 801 const GValue *subtrahend); 802 803 /* fixation */ 804 805 GST_API 806 gboolean gst_value_is_fixed (const GValue *value); 807 808 GST_API 809 gboolean gst_value_fixate (GValue *dest, 810 const GValue *src); 811 812 /* Flagset registration wrapper */ 813 814 GST_API 815 GType gst_flagset_register (GType flags_type); 816 817 G_END_DECLS 818 819 #endif 820 821 822