/usr/share/gtk-doc/html/gst-plugins-base-libs-0.10/gst-plugins-base-libs-gstvideooverlaycomposition.html is in gstreamer0.10-plugins-base-doc 0.10.36-1ubuntu0.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>gstvideooverlaycomposition</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
<link rel="home" href="index.html" title="GStreamer Base Plugins 0.10 Library Reference Manual">
<link rel="up" href="gstreamer-video.html" title="Video Library">
<link rel="prev" href="gst-plugins-base-libs-gstvideo.html" title="gstvideo">
<link rel="next" href="gst-plugins-base-libs-gstvideofilter.html" title="gstvideofilter">
<meta name="generator" content="GTK-Doc V1.18 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
<tr valign="middle">
<td><a accesskey="p" href="gst-plugins-base-libs-gstvideo.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="gstreamer-video.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
<th width="100%" align="center">GStreamer Base Plugins 0.10 Library Reference Manual</th>
<td><a accesskey="n" href="gst-plugins-base-libs-gstvideofilter.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr>
<tr><td colspan="5" class="shortcuts">
<a href="#gst-plugins-base-libs-gstvideooverlaycomposition.synopsis" class="shortcut">Top</a>
|
<a href="#gst-plugins-base-libs-gstvideooverlaycomposition.description" class="shortcut">Description</a>
</td></tr>
</table>
<div class="refentry">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstvideooverlaycomposition.top_of_page"></a>gstvideooverlaycomposition</span></h2>
<p>gstvideooverlaycomposition — Video Buffer Overlay Compositions (Subtitles, Logos)</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <gst/video/video-overlay-composition.h>
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition">GstVideoOverlayComposition</a>;
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayCompositionClass" title="GstVideoOverlayCompositionClass">GstVideoOverlayCompositionClass</a>;
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-new" title="gst_video_overlay_composition_new ()">gst_video_overlay_composition_new</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-ref" title="gst_video_overlay_composition_ref ()">gst_video_overlay_composition_ref</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-unref" title="gst_video_overlay_composition_unref ()">gst_video_overlay_composition_unref</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-add-rectangle" title="gst_video_overlay_composition_add_rectangle ()">gst_video_overlay_composition_add_rectangle</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-n-rectangles" title="gst_video_overlay_composition_n_rectangles ()">gst_video_overlay_composition_n_rectangles</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-get-rectangle" title="gst_video_overlay_composition_get_rectangle ()">gst_video_overlay_composition_get_rectangle</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-get-seqnum" title="gst_video_overlay_composition_get_seqnum ()">gst_video_overlay_composition_get_seqnum</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-copy" title="gst_video_overlay_composition_copy ()">gst_video_overlay_composition_copy</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-make-writable" title="gst_video_overlay_composition_make_writable ()">gst_video_overlay_composition_make_writable</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-blend" title="gst_video_overlay_composition_blend ()">gst_video_overlay_composition_blend</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *video_buf</code></em>);
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-buffer-get-overlay-composition" title="gst_video_buffer_get_overlay_composition ()">gst_video_buffer_get_overlay_composition</a>
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buf</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-buffer-set-overlay-composition" title="gst_video_buffer_set_overlay_composition ()">gst_video_buffer_set_overlay_composition</a>
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);
enum <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags">GstVideoOverlayFormatFlags</a>;
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle">GstVideoOverlayRectangle</a>;
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangleClass" title="GstVideoOverlayRectangleClass">GstVideoOverlayRectangleClass</a>;
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-new-argb" title="gst_video_overlay_rectangle_new_argb ()">gst_video_overlay_rectangle_new_argb</a>
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *pixels</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> height</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> stride</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_height</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-ref" title="gst_video_overlay_rectangle_ref ()">gst_video_overlay_rectangle_ref</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *comp</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-unref" title="gst_video_overlay_rectangle_unref ()">gst_video_overlay_rectangle_unref</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *comp</code></em>);
<a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-pixels-argb" title="gst_video_overlay_rectangle_get_pixels_argb ()">gst_video_overlay_rectangle_get_pixels_argb</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *stride</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);
<a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-pixels-unscaled-argb" title="gst_video_overlay_rectangle_get_pixels_unscaled_argb ()">gst_video_overlay_rectangle_get_pixels_unscaled_argb</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *height</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *stride</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()">gst_video_overlay_rectangle_get_render_rectangle</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_x</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_y</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_height</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-seqnum" title="gst_video_overlay_rectangle_get_seqnum ()">gst_video_overlay_rectangle_get_seqnum</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-set-render-rectangle" title="gst_video_overlay_rectangle_set_render_rectangle ()">gst_video_overlay_rectangle_set_render_rectangle</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_height</code></em>);
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-copy" title="gst_video_overlay_rectangle_copy ()">gst_video_overlay_rectangle_copy</a>
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition.description"></a><h2>Description</h2>
<p>
</p>
<div class="refsect2">
<a name="idp32724632"></a><p>
Functions to create and handle overlay compositions on video buffers.
</p>
<p>
An overlay composition describes one or more overlay rectangles to be
blended on top of a video buffer.
</p>
<p>
This API serves two main purposes:
</p>
<div class="itemizedlist">
<span class="type">GstOverlayComposition</span><ul class="itemizedlist" type="disc">
<li class="listitem">
it can be used to attach overlay information (subtitles or logos)
to non-raw video buffers such as GL/VAAPI/VDPAU surfaces. The actual
blending of the overlay can then be done by e.g. the video sink that
processes these non-raw buffers.
</li>
<li class="listitem">
it can also be used to blend overlay rectangles on top of raw video
buffers, thus consolidating blending functionality for raw video in
one place.
</li>
</ul>
</div>
<p>
</p>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstVideoOverlayComposition"></a><h3>GstVideoOverlayComposition</h3>
<pre class="programlisting">typedef struct _GstVideoOverlayComposition GstVideoOverlayComposition;</pre>
<p>
An opaque video overlay composition object. A composition contains
multiple overlay rectangles.
</p>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoOverlayCompositionClass"></a><h3>GstVideoOverlayCompositionClass</h3>
<pre class="programlisting">typedef struct _GstVideoOverlayCompositionClass GstVideoOverlayCompositionClass;</pre>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-new"></a><h3>gst_video_overlay_composition_new ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * gst_video_overlay_composition_new
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre>
<p>
Creates a new video overlay composition object to hold one or more
overlay rectangles.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> to add to the
composition. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>. Unref with
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-unref" title="gst_video_overlay_composition_unref ()"><code class="function">gst_video_overlay_composition_unref()</code></a> when no longer needed. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-ref"></a><h3>gst_video_overlay_composition_ref ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * gst_video_overlay_composition_ref
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>
Increases the refcount of the given composition by one.
</p>
<p>
Note that the refcount affects the writeability
of <em class="parameter"><code>comp</code></em>, use <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-make-writable" title="gst_video_overlay_composition_make_writable ()"><code class="function">gst_video_overlay_composition_make_writable()</code></a> to ensure
a composition and its rectangles can be modified.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<em class="parameter"><code>comp</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-unref"></a><h3>gst_video_overlay_composition_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_video_overlay_composition_unref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>
Decreases the refcount of the composition. If the refcount reaches 0, the
composition will be freed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr></tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-add-rectangle"></a><h3>gst_video_overlay_composition_add_rectangle ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_video_overlay_composition_add_rectangle
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre>
<p>
Adds an overlay rectangle to an existing overlay composition object. This
must be done right after creating the overlay composition.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> to add to the
composition. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-n-rectangles"></a><h3>gst_video_overlay_composition_n_rectangles ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_video_overlay_composition_n_rectangles
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>
Returns the number of <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>s contained in <em class="parameter"><code>comp</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the number of rectangles</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-get-rectangle"></a><h3>gst_video_overlay_composition_get_rectangle ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * gst_video_overlay_composition_get_rectangle
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n</code></em>);</pre>
<p>
Returns the <em class="parameter"><code>n</code></em>-th <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> contained in <em class="parameter"><code>comp</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>number of the rectangle to get</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the <em class="parameter"><code>n</code></em>-th rectangle, or NULL if <em class="parameter"><code>n</code></em> is out of
bounds. Will not return a new reference, the caller will need to
obtain her own reference using <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-ref" title="gst_video_overlay_rectangle_ref ()"><code class="function">gst_video_overlay_rectangle_ref()</code></a>
if needed. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-get-seqnum"></a><h3>gst_video_overlay_composition_get_seqnum ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_video_overlay_composition_get_seqnum
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>
Returns the sequence number of this composition. Sequence numbers are
monotonically increasing and unique for overlay compositions and rectangles
(meaning there will never be a rectangle with the same sequence number as
a composition).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the sequence number of <em class="parameter"><code>comp</code></em>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-copy"></a><h3>gst_video_overlay_composition_copy ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * gst_video_overlay_composition_copy
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>
Makes a copy of <em class="parameter"><code>comp</code></em> and all contained rectangles, so that it is possible
to modify the composition and contained rectangles (e.g. add additional
rectangles or change the render co-ordinates or render dimension). The
actual overlay pixel data buffers contained in the rectangles are not
copied.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> to copy. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> equivalent
to <em class="parameter"><code>comp</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-make-writable"></a><h3>gst_video_overlay_composition_make_writable ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * gst_video_overlay_composition_make_writable
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>
Takes ownership of <em class="parameter"><code>comp</code></em> and returns a version of <em class="parameter"><code>comp</code></em> that is writable
(i.e. can be modified). Will either return <em class="parameter"><code>comp</code></em> right away, or create a
new writable copy of <em class="parameter"><code>comp</code></em> and unref <em class="parameter"><code>comp</code></em> itself. All the contained
rectangles will also be copied, but the actual overlay pixel data buffers
contained in the rectangles are not copied.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> to copy. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a writable <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>
equivalent to <em class="parameter"><code>comp</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-blend"></a><h3>gst_video_overlay_composition_blend ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_video_overlay_composition_blend (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *video_buf</code></em>);</pre>
<p>
Blends the overlay rectangles in <em class="parameter"><code>comp</code></em> on top of the raw video data
contained in <em class="parameter"><code>video_buf</code></em>. The data in <em class="parameter"><code>video_buf</code></em> must be writable. If
needed, use <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#gst-buffer-make-writable"><code class="function">gst_buffer_make_writable()</code></a> before calling this function to
ensure a buffer is writable. <em class="parameter"><code>video_buf</code></em> must also have valid raw video
caps set on it.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>video_buf</code></em> :</span></p></td>
<td>a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> containing raw video data in a supported format</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-buffer-get-overlay-composition"></a><h3>gst_video_buffer_get_overlay_composition ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> * gst_video_buffer_get_overlay_composition
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buf</code></em>);</pre>
<p>
Get the overlay composition that has previously been attached to a buffer
with <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-buffer-get-overlay-composition" title="gst_video_buffer_get_overlay_composition ()"><code class="function">gst_video_buffer_get_overlay_composition()</code></a>, usually by another element
upstream.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>buf</code></em> :</span></p></td>
<td>a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> attached to
this buffer, or NULL. Does not return a reference to the composition,
caller must obtain her own ref via <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-ref" title="gst_video_overlay_composition_ref ()"><code class="function">gst_video_overlay_composition_ref()</code></a>
if needed. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-buffer-set-overlay-composition"></a><h3>gst_video_buffer_set_overlay_composition ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_video_buffer_set_overlay_composition
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>
Sets an overlay composition on a buffer. The buffer will obtain its own
reference to the composition, meaning this function does not take ownership
of <em class="parameter"><code>comp</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>buf</code></em> :</span></p></td>
<td>a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>, or NULL to clear a
previously-set composition. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoOverlayFormatFlags"></a><h3>enum GstVideoOverlayFormatFlags</h3>
<pre class="programlisting">typedef enum {
GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE = 0
} GstVideoOverlayFormatFlags;
</pre>
<p>
Overlay format flags.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><a name="GST-VIDEO-OVERLAY-FORMAT-FLAG-NONE:CAPS"></a><span class="term"><code class="literal">GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE</code></span></p></td>
<td>no flags
</td>
</tr></tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoOverlayRectangle"></a><h3>GstVideoOverlayRectangle</h3>
<pre class="programlisting">typedef struct _GstVideoOverlayRectangle GstVideoOverlayRectangle;</pre>
<p>
An opaque video overlay rectangle object. A rectangle contains a single
overlay rectangle which can be added to a composition.
</p>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoOverlayRectangleClass"></a><h3>GstVideoOverlayRectangleClass</h3>
<pre class="programlisting">typedef struct _GstVideoOverlayRectangleClass GstVideoOverlayRectangleClass;</pre>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-new-argb"></a><h3>gst_video_overlay_rectangle_new_argb ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * gst_video_overlay_rectangle_new_argb
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *pixels</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> height</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> stride</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_height</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre>
<p>
Creates a new video overlay rectangle with ARGB pixel data. The layout
of the components in memory is B-G-R-A on little-endian platforms
(corresponding to <a class="link" href="gst-plugins-base-libs-gstvideo.html#GST-VIDEO-FORMAT-BGRA:CAPS"><span class="type">GST_VIDEO_FORMAT_BGRA</span></a>) and A-R-G-B on big-endian
platforms (corresponding to <a class="link" href="gst-plugins-base-libs-gstvideo.html#GST-VIDEO-FORMAT-ARGB:CAPS"><span class="type">GST_VIDEO_FORMAT_ARGB</span></a>). In other words,
pixels are treated as 32-bit words and the lowest 8 bits then contain
the blue component value and the highest 8 bits contain the alpha
component value. The RGB values are non-premultiplied. This is the
format that is used by most hardware, and also many rendering libraries
such as Cairo, for example.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixels</code></em> :</span></p></td>
<td>a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> pointing to the pixel memory. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>the width of the rectangle in <em class="parameter"><code>pixels</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td>the height of the rectangle in <em class="parameter"><code>pixels</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>stride</code></em> :</span></p></td>
<td>the stride of the rectangle in <em class="parameter"><code>pixels</code></em> in bytes (>= 4*width)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td>the X co-ordinate on the video where the top-left corner of this
overlay rectangle should be rendered to</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td>the Y co-ordinate on the video where the top-left corner of this
overlay rectangle should be rendered to</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>render_width</code></em> :</span></p></td>
<td>the render width of this rectangle on the video</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>render_height</code></em> :</span></p></td>
<td>the render height of this rectangle on the video</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>
<td>flags (currently unused)</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>. Unref with
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-unref" title="gst_video_overlay_rectangle_unref ()"><code class="function">gst_video_overlay_rectangle_unref()</code></a> when no longer needed. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-ref"></a><h3>gst_video_overlay_rectangle_ref ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * gst_video_overlay_rectangle_ref
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *comp</code></em>);</pre>
<p>
Increases the refcount of the given rectangle by one.
</p>
<p>
Note that the refcount affects the writeability
of <em class="parameter"><code>comp</code></em>, use <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-copy" title="gst_video_overlay_rectangle_copy ()"><code class="function">gst_video_overlay_rectangle_copy()</code></a> to ensure a rectangle can
be modified (there is no <code class="function">gst_video_overlay_rectangle_make_writable()</code> because
it is unlikely that someone will hold the single reference to the rectangle
and not know that that's the case).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<em class="parameter"><code>comp</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-unref"></a><h3>gst_video_overlay_rectangle_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_video_overlay_rectangle_unref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *comp</code></em>);</pre>
<p>
Decreases the refcount of the rectangle. If the refcount reaches 0, the
rectangle will be freed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>comp</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr></tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-get-pixels-argb"></a><h3>gst_video_overlay_rectangle_get_pixels_argb ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * gst_video_overlay_rectangle_get_pixels_argb
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *stride</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>stride</code></em> :</span></p></td>
<td>address of guint variable where to store the
row stride of the ARGB pixel data in the buffer. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>
<td>flags (unused)</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the ARGB pixel data with
row stride <em class="parameter"><code>stride</code></em> and width and height of the render dimensions as per
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()"><code class="function">gst_video_overlay_rectangle_get_render_rectangle()</code></a>. This function does
not return a reference, the caller should obtain a reference of her own
with <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-get-pixels-unscaled-argb"></a><h3>gst_video_overlay_rectangle_get_pixels_unscaled_argb ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * gst_video_overlay_rectangle_get_pixels_unscaled_argb
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *height</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *stride</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre>
<p>
Retrieves the pixel data as it is. This is useful if the caller can
do the scaling itself when handling the overlaying. The rectangle will
need to be scaled to the render dimensions, which can be retrieved using
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()"><code class="function">gst_video_overlay_rectangle_get_render_rectangle()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>address where to store the width of the unscaled
rectangle in pixels. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>address where to store the height of the unscaled
rectangle in pixels. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>stride</code></em> :</span></p></td>
<td>address of guint variable where to store the row
stride of the ARGB pixel data in the buffer. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>
<td>flags for future use (unused)</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the ARGB pixel data with
row stride <em class="parameter"><code>stride</code></em>. This function does not return a reference, the caller
should obtain a reference of her own with <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-get-render-rectangle"></a><h3>gst_video_overlay_rectangle_get_render_rectangle ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_video_overlay_rectangle_get_render_rectangle
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_x</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_y</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_height</code></em>);</pre>
<p>
Retrieves the render position and render dimension of the overlay
rectangle on the video.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>render_x</code></em> :</span></p></td>
<td>address where to store the X render offset. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>render_y</code></em> :</span></p></td>
<td>address where to store the Y render offset. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>render_width</code></em> :</span></p></td>
<td>address where to store the render width. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>render_height</code></em> :</span></p></td>
<td>address where to store the render height. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if valid render dimensions were retrieved.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-get-seqnum"></a><h3>gst_video_overlay_rectangle_get_seqnum ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_video_overlay_rectangle_get_seqnum
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre>
<p>
Returns the sequence number of this rectangle. Sequence numbers are
monotonically increasing and unique for overlay compositions and rectangles
(meaning there will never be a rectangle with the same sequence number as
a composition).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the sequence number of <em class="parameter"><code>rectangle</code></em>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-set-render-rectangle"></a><h3>gst_video_overlay_rectangle_set_render_rectangle ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_video_overlay_rectangle_set_render_rectangle
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_height</code></em>);</pre>
<p>
Sets the render position and dimensions of the rectangle on the video.
This function is mainly for elements that modify the size of the video
in some way (e.g. through scaling or cropping) and need to adjust the
details of any overlays to match the operation that changed the size.
</p>
<p>
<em class="parameter"><code>rectangle</code></em> must be writable, meaning its refcount must be 1. You can
make the rectangles inside a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> writable using
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-make-writable" title="gst_video_overlay_composition_make_writable ()"><code class="function">gst_video_overlay_composition_make_writable()</code></a> or
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-copy" title="gst_video_overlay_composition_copy ()"><code class="function">gst_video_overlay_composition_copy()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>render_x</code></em> :</span></p></td>
<td>render X position of rectangle on video</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>render_y</code></em> :</span></p></td>
<td>render Y position of rectangle on video</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>render_width</code></em> :</span></p></td>
<td>render width of rectangle</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>render_height</code></em> :</span></p></td>
<td>render height of rectangle</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-copy"></a><h3>gst_video_overlay_rectangle_copy ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> * gst_video_overlay_rectangle_copy
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre>
<p>
Makes a copy of <em class="parameter"><code>rectangle</code></em>, so that it is possible to modify it
(e.g. to change the render co-ordinates or render dimension). The
actual overlay pixel data buffers contained in the rectangle are not
copied.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>rectangle</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> to copy. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> equivalent
to <em class="parameter"><code>rectangle</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.36</p>
</div>
</div>
</div>
<div class="footer">
<hr>
Generated by GTK-Doc V1.18</div>
</body>
</html>
|