/usr/share/gtk-doc/html/gst-plugins-base-libs-0.10/gst-plugins-base-libs-gstmixer.html is in gstreamer0.10-plugins-base-doc 0.10.36-2.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>gstmixer</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-interfaces.html" title="Interfaces Library">
<link rel="prev" href="gst-plugins-base-libs-gstcolorbalancechannel.html" title="gstcolorbalancechannel">
<link rel="next" href="gst-plugins-base-libs-gstmixeroptions.html" title="gstmixeroptions">
<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-gstcolorbalancechannel.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="gstreamer-interfaces.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-gstmixeroptions.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-gstmixer.synopsis" class="shortcut">Top</a>
|
<a href="#gst-plugins-base-libs-gstmixer.description" class="shortcut">Description</a>
|
<a href="#gst-plugins-base-libs-gstmixer.object-hierarchy" class="shortcut">Object Hierarchy</a>
|
<a href="#gst-plugins-base-libs-gstmixer.prerequisites" class="shortcut">Prerequisites</a>
|
<a href="#gst-plugins-base-libs-gstmixer.signals" class="shortcut">Signals</a>
</td></tr>
</table>
<div class="refentry">
<a name="gst-plugins-base-libs-gstmixer"></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-gstmixer.top_of_page"></a>gstmixer</span></h2>
<p>gstmixer — Interface for elements that provide mixer operations</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="gst-plugins-base-libs-gstmixer.synopsis"></a><h2>Synopsis</h2>
<a name="GstMixer"></a><pre class="synopsis">
#include <gst/interfaces/mixer.h>
<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer-struct" title="GstMixer">GstMixer</a>;
enum <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixerType" title="enum GstMixerType">GstMixerType</a>;
enum <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixerFlags" title="enum GstMixerFlags">GstMixerFlags</a>;
enum <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixerMessageType" title="enum GstMixerMessageType">GstMixerMessageType</a>;
const <a href="/usr/share/gtk-doc/html/glib/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> * <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-list-tracks" title="gst_mixer_list_tracks ()">gst_mixer_list_tracks</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-get-volume" title="gst_mixer_get_volume ()">gst_mixer_get_volume</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</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> *volumes</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-set-volume" title="gst_mixer_set_volume ()">gst_mixer_set_volume</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</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> *volumes</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-set-mute" title="gst_mixer_set_mute ()">gst_mixer_set_mute</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> mute</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-set-record" title="gst_mixer_set_record ()">gst_mixer_set_record</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> record</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-set-option" title="gst_mixer_set_option ()">gst_mixer_set_option</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> *opts</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *value</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-mute-toggled" title="gst_mixer_mute_toggled ()">gst_mixer_mute_toggled</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> mute</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-record-toggled" title="gst_mixer_record_toggled ()">gst_mixer_record_toggled</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> record</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-volume-changed" title="gst_mixer_volume_changed ()">gst_mixer_volume_changed</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</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> *volumes</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-option-changed" title="gst_mixer_option_changed ()">gst_mixer_option_changed</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> *opts</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *value</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-options-list-changed" title="gst_mixer_options_list_changed ()">gst_mixer_options_list_changed</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> *opts</code></em>);
const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-get-option" title="gst_mixer_get_option ()">gst_mixer_get_option</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> *opts</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-mixer-changed" title="gst_mixer_mixer_changed ()">gst_mixer_mixer_changed</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>);
<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixerFlags" title="enum GstMixerFlags"><span class="returnvalue">GstMixerFlags</span></a> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-get-mixer-flags" title="gst_mixer_get_mixer_flags ()">gst_mixer_get_mixer_flags</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>);
<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixerType" title="enum GstMixerType"><span class="returnvalue">GstMixerType</span></a> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-get-mixer-type" title="gst_mixer_get_mixer_type ()">gst_mixer_get_mixer_type</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>);
<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixerMessageType" title="enum GstMixerMessageType"><span class="returnvalue">GstMixerMessageType</span></a> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-message-get-type" title="gst_mixer_message_get_type ()">gst_mixer_message_get_type</a> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-message-parse-mute-toggled" title="gst_mixer_message_parse_mute_toggled ()">gst_mixer_message_parse_mute_toggled</a>
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> **track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *mute</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-message-parse-option-changed" title="gst_mixer_message_parse_option_changed ()">gst_mixer_message_parse_option_changed</a>
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> **options</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **value</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-message-parse-record-toggled" title="gst_mixer_message_parse_record_toggled ()">gst_mixer_message_parse_record_toggled</a>
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> **track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *record</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-message-parse-volume-changed" title="gst_mixer_message_parse_volume_changed ()">gst_mixer_message_parse_volume_changed</a>
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> **track</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> **volumes</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> *num_channels</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstmixer.html#gst-mixer-message-parse-options-list-changed" title="gst_mixer_message_parse_options_list_changed ()">gst_mixer_message_parse_options_list_changed</a>
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> **options</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstmixer.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
GInterface
+----GstMixer
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstmixer.prerequisites"></a><h2>Prerequisites</h2>
<p>
GstMixer requires
<a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstImplementsInterface.html">GstImplementsInterface</a> and <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html">GstElement</a>.</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstmixer.signals"></a><h2>Signals</h2>
<pre class="synopsis">
"<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer-mute-toggled" title='The "mute-toggled" signal'>mute-toggled</a>" : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a>
"<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer-option-changed" title='The "option-changed" signal'>option-changed</a>" : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a>
"<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer-record-toggled" title='The "record-toggled" signal'>record-toggled</a>" : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a>
"<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer-volume-changed" title='The "volume-changed" signal'>volume-changed</a>" : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a>
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstmixer.description"></a><h2>Description</h2>
<p>
Basic interface for hardware mixer controls.
</p>
<p>
Applications rarely need to use this interface, it is provided mainly
for system-level mixer applets and the like. Volume control in playback
applications should be done using a <code class="classname">volume</code>
element or, if available, using the <span class="quote">“<span class="quote">volume</span>”</span> property of
the audio sink element used (as provided by <code class="classname">pulsesink</code>
for example), or even better: just use the <code class="classname">playbin2</code>
element's <span class="quote">“<span class="quote">volume</span>”</span> property.
</p>
<p>
Usage: In order to use the <code class="classname">GstMixer</code> interface, the
element needs to be at least in READY state (so that the element has opened
the mixer device). Once the element has been set to READY state or higher,
it can be cast to a <code class="classname">GstMixer</code> using the GST_MIXER
macro (in C) and the mixer API can be used.
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstmixer.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstMixer-struct"></a><h3>GstMixer</h3>
<pre class="programlisting">typedef struct _GstMixer GstMixer;</pre>
</div>
<hr>
<div class="refsect2">
<a name="GstMixerType"></a><h3>enum GstMixerType</h3>
<pre class="programlisting">typedef enum {
GST_MIXER_HARDWARE,
GST_MIXER_SOFTWARE
} GstMixerType;
</pre>
<p>
Mixer classification.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GST-MIXER-HARDWARE:CAPS"></a><span class="term"><code class="literal">GST_MIXER_HARDWARE</code></span></p></td>
<td>mixing is implemented with dedicated hardware.
</td>
</tr>
<tr>
<td><p><a name="GST-MIXER-SOFTWARE:CAPS"></a><span class="term"><code class="literal">GST_MIXER_SOFTWARE</code></span></p></td>
<td>mixing is implemented via software processing.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstMixerFlags"></a><h3>enum GstMixerFlags</h3>
<pre class="programlisting">typedef enum {
GST_MIXER_FLAG_NONE = 0,
GST_MIXER_FLAG_AUTO_NOTIFICATIONS = (1<<0),
GST_MIXER_FLAG_HAS_WHITELIST = (1<<1),
GST_MIXER_FLAG_GROUPING = (1<<2),
} GstMixerFlags;
</pre>
<p>
Flags indicating which optional features are supported by a mixer
implementation.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GST-MIXER-FLAG-NONE:CAPS"></a><span class="term"><code class="literal">GST_MIXER_FLAG_NONE</code></span></p></td>
<td>No flags
</td>
</tr>
<tr>
<td><p><a name="GST-MIXER-FLAG-AUTO-NOTIFICATIONS:CAPS"></a><span class="term"><code class="literal">GST_MIXER_FLAG_AUTO_NOTIFICATIONS</code></span></p></td>
<td>The mixer implementation automatically
sends notification messages.
</td>
</tr>
<tr>
<td><p><a name="GST-MIXER-FLAG-HAS-WHITELIST:CAPS"></a><span class="term"><code class="literal">GST_MIXER_FLAG_HAS_WHITELIST</code></span></p></td>
<td>The mixer implementation flags tracks that
should be displayed by default (whitelisted). Since: 0.10.23
</td>
</tr>
<tr>
<td><p><a name="GST-MIXER-FLAG-GROUPING:CAPS"></a><span class="term"><code class="literal">GST_MIXER_FLAG_GROUPING</code></span></p></td>
<td>The mixer implementation will leave some controls
marked without either input or output. Controls marked as input or
output should be grouped with input & output sliders, even if they
are options or bare switches. Since: 0.10.23
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.14</p>
</div>
<hr>
<div class="refsect2">
<a name="GstMixerMessageType"></a><h3>enum GstMixerMessageType</h3>
<pre class="programlisting">typedef enum {
GST_MIXER_MESSAGE_INVALID,
GST_MIXER_MESSAGE_MUTE_TOGGLED,
GST_MIXER_MESSAGE_RECORD_TOGGLED,
GST_MIXER_MESSAGE_VOLUME_CHANGED,
GST_MIXER_MESSAGE_OPTION_CHANGED,
GST_MIXER_MESSAGE_OPTIONS_LIST_CHANGED,
GST_MIXER_MESSAGE_MIXER_CHANGED
} GstMixerMessageType;
</pre>
<p>
An enumeration for the type of a GstMixer message received on the bus
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GST-MIXER-MESSAGE-INVALID:CAPS"></a><span class="term"><code class="literal">GST_MIXER_MESSAGE_INVALID</code></span></p></td>
<td>Not a GstMixer message
</td>
</tr>
<tr>
<td><p><a name="GST-MIXER-MESSAGE-MUTE-TOGGLED:CAPS"></a><span class="term"><code class="literal">GST_MIXER_MESSAGE_MUTE_TOGGLED</code></span></p></td>
<td>A mute-toggled GstMixer message
</td>
</tr>
<tr>
<td><p><a name="GST-MIXER-MESSAGE-RECORD-TOGGLED:CAPS"></a><span class="term"><code class="literal">GST_MIXER_MESSAGE_RECORD_TOGGLED</code></span></p></td>
<td>A record-toggled GstMixer message
</td>
</tr>
<tr>
<td><p><a name="GST-MIXER-MESSAGE-VOLUME-CHANGED:CAPS"></a><span class="term"><code class="literal">GST_MIXER_MESSAGE_VOLUME_CHANGED</code></span></p></td>
<td>A volume-changed GstMixer message
</td>
</tr>
<tr>
<td><p><a name="GST-MIXER-MESSAGE-OPTION-CHANGED:CAPS"></a><span class="term"><code class="literal">GST_MIXER_MESSAGE_OPTION_CHANGED</code></span></p></td>
<td>An option-changed GstMixer message
</td>
</tr>
<tr>
<td><p><a name="GST-MIXER-MESSAGE-OPTIONS-LIST-CHANGED:CAPS"></a><span class="term"><code class="literal">GST_MIXER_MESSAGE_OPTIONS_LIST_CHANGED</code></span></p></td>
<td>An options-list-changed
GstMixer message, posted when the list of available options for a
GstMixerOptions object has changed (Since: 0.10.18)
</td>
</tr>
<tr>
<td><p><a name="GST-MIXER-MESSAGE-MIXER-CHANGED:CAPS"></a><span class="term"><code class="literal">GST_MIXER_MESSAGE_MIXER_CHANGED</code></span></p></td>
<td>A mixer-changed GstMixer message, posted
when the list of available mixer tracks has changed. The application
should re-build its interface in this case (Since: 0.10.18)
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.14</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-list-tracks"></a><h3>gst_mixer_list_tracks ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> * gst_mixer_list_tracks (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>);</pre>
<p>
Returns a list of available tracks for this mixer/element. Note
that it is allowed for sink (output) elements to only provide
the output tracks in this list. Likewise, for sources (inputs),
it is allowed to only provide input elements in this list.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) to get the tracks from.</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/glib/glib-Doubly-Linked-Lists.html#GList"><span class="type">GList</span></a> consisting of zero or more <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTracks</span></a>.
The list is owned by the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> instance and must not be freed
or modified.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-get-volume"></a><h3>gst_mixer_get_volume ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_get_volume (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</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> *volumes</code></em>);</pre>
<p>
Get the current volume(s) on the given track.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) that owns the track</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>track</code></em> :</span></p></td>
<td>the GstMixerTrack to get the volume from.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>volumes</code></em> :</span></p></td>
<td>a pre-allocated array of integers (of size
track->num_channels) to store the current volume
of each channel in the given track in.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-set-volume"></a><h3>gst_mixer_set_volume ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_set_volume (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</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> *volumes</code></em>);</pre>
<p>
Sets the volume on each channel in a track. Short note about
naming: a track is defined as one separate stream owned by
the mixer/element, such as 'Line-in' or 'Microphone'. A
channel is said to be a mono-stream inside this track. A
stereo track thus contains two channels.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>The <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) that owns the track.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>track</code></em> :</span></p></td>
<td>The <a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> to set the volume on.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>volumes</code></em> :</span></p></td>
<td>an array of integers (of size track->num_channels)
that gives the wanted volume for each channel in
this track.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-set-mute"></a><h3>gst_mixer_set_mute ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_set_mute (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> mute</code></em>);</pre>
<p>
Mutes or unmutes the given channel. To find out whether a
track is currently muted, use <a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GST-MIXER-TRACK-HAS-FLAG:CAPS" title="GST_MIXER_TRACK_HAS_FLAG()"><code class="function">GST_MIXER_TRACK_HAS_FLAG()</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>mixer</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) that owns the track.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>track</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> to operate on.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mute</code></em> :</span></p></td>
<td>a boolean value indicating whether to turn on or off
muting.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-set-record"></a><h3>gst_mixer_set_record ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_set_record (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> record</code></em>);</pre>
<p>
Enables or disables recording on the given track. Note that
this is only possible on input tracks, not on output tracks
(see <a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GST-MIXER-TRACK-HAS-FLAG:CAPS" title="GST_MIXER_TRACK_HAS_FLAG()"><code class="function">GST_MIXER_TRACK_HAS_FLAG()</code></a> and the GST_MIXER_TRACK_INPUT
flag).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>The <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) that owns the track.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>track</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> to operate on.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>record</code></em> :</span></p></td>
<td>a boolean value that indicates whether to turn on
or off recording.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-set-option"></a><h3>gst_mixer_set_option ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_set_option (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> *opts</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *value</code></em>);</pre>
<p>
Sets a name/value option in the mixer to the requested value.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>The <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) that owns the optionlist.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>opts</code></em> :</span></p></td>
<td>The <a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> that we operate on.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>The requested new option value.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-mute-toggled"></a><h3>gst_mixer_mute_toggled ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_mute_toggled (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> mute</code></em>);</pre>
<p>
This function is called by the mixer implementation to produce
a notification message on the bus indicating that the given track
has changed mute state.
</p>
<p>
This function only works for GstElements that are implementing the
GstMixer interface, and the element needs to have been provided a bus.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) that owns the track</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>track</code></em> :</span></p></td>
<td>the GstMixerTrack that has change mute state.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mute</code></em> :</span></p></td>
<td>the new state of the mute flag on the track</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-record-toggled"></a><h3>gst_mixer_record_toggled ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_record_toggled (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> record</code></em>);</pre>
<p>
This function is called by the mixer implementation to produce
a notification message on the bus indicating that the given track
has changed recording state.
</p>
<p>
This function only works for GstElements that are implementing the
GstMixer interface, and the element needs to have been provided a bus.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) that owns the track</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>track</code></em> :</span></p></td>
<td>the GstMixerTrack that has changed recording state.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>record</code></em> :</span></p></td>
<td>the new state of the record flag on the track</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-volume-changed"></a><h3>gst_mixer_volume_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_volume_changed (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *track</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> *volumes</code></em>);</pre>
<p>
This function is called by the mixer implementation to produce
a notification message on the bus indicating that the volume(s) for the
given track have changed.
</p>
<p>
This function only works for GstElements that are implementing the
GstMixer interface, and the element needs to have been provided a bus.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) that owns the track</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>track</code></em> :</span></p></td>
<td>the GstMixerTrack that has changed.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>volumes</code></em> :</span></p></td>
<td>Array of volume values, one per channel on the mixer track.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-option-changed"></a><h3>gst_mixer_option_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_option_changed (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> *opts</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *value</code></em>);</pre>
<p>
This function is called by the mixer implementation to produce
a notification message on the bus indicating that the given options
object has changed state.
</p>
<p>
This function only works for GstElements that are implementing the
GstMixer interface, and the element needs to have been provided a bus.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) that owns the options</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>opts</code></em> :</span></p></td>
<td>the GstMixerOptions that has changed value.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>the new value of the GstMixerOptions.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-options-list-changed"></a><h3>gst_mixer_options_list_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_options_list_changed (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> *opts</code></em>);</pre>
<p>
This function is called by the mixer implementation to produce
a notification message on the bus indicating that the list of possible
options of a given options object has changed.
</p>
<p>
The new options are not contained in the message on purpose. Applications
should call <a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#gst-mixer-options-get-values" title="gst_mixer_options_get_values ()"><code class="function">gst_mixer_options_get_values()</code></a> on <em class="parameter"><code>opts</code></em> to make <em class="parameter"><code>opts</code></em> update
its internal state and obtain the new list of values.
</p>
<p>
This function only works for GstElements that are implementing the
GstMixer interface, and the element needs to have been provided a bus
for this to work.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) that owns the options</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>opts</code></em> :</span></p></td>
<td>the GstMixerOptions whose list of values has changed</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.18</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-get-option"></a><h3>gst_mixer_get_option ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * gst_mixer_get_option (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> *opts</code></em>);</pre>
<p>
Get the current value of a name/value option in the mixer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>The <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) that owns the optionlist.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>opts</code></em> :</span></p></td>
<td>The <a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> that we operate on.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>current value of the name/value option.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-mixer-changed"></a><h3>gst_mixer_mixer_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_mixer_changed (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>);</pre>
<p>
This function is called by the mixer implementation to produce
a notification message on the bus indicating that the list of available
mixer tracks for a given mixer object has changed. Applications should
rebuild their interface when they receive this message.
</p>
<p>
This function only works for GstElements that are implementing the
GstMixer interface, and the element needs to have been provided a bus.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> (a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>) which has changed</td>
</tr></tbody>
</table></div>
<p class="since">Since 0.10.18</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-get-mixer-flags"></a><h3>gst_mixer_get_mixer_flags ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixerFlags" title="enum GstMixerFlags"><span class="returnvalue">GstMixerFlags</span></a> gst_mixer_get_mixer_flags (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>);</pre>
<p>
Get the set of supported flags for this mixer implementation.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>The <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> implementation</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A set of or-ed GstMixerFlags for supported features.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-get-mixer-type"></a><h3>gst_mixer_get_mixer_type ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixerType" title="enum GstMixerType"><span class="returnvalue">GstMixerType</span></a> gst_mixer_get_mixer_type (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>);</pre>
<p>
Get the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixerType" title="enum GstMixerType"><span class="type">GstMixerType</span></a> of this mixer implementation.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>mixer</code></em> :</span></p></td>
<td>The <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> implementation</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixerType" title="enum GstMixerType"><span class="type">GstMixerType</span></a>.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.24</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-message-get-type"></a><h3>gst_mixer_message_get_type ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixerMessageType" title="enum GstMixerMessageType"><span class="returnvalue">GstMixerMessageType</span></a> gst_mixer_message_get_type (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>);</pre>
<p>
Check a bus message to see if it is a GstMixer notification
message and return the GstMixerMessageType identifying which
type of notification it is.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td>
<td>A GstMessage to inspect.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The type of the GstMixerMessage, or GST_MIXER_MESSAGE_INVALID
if the message is not a GstMixer notification.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.14</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-message-parse-mute-toggled"></a><h3>gst_mixer_message_parse_mute_toggled ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_message_parse_mute_toggled
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> **track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *mute</code></em>);</pre>
<p>
Extracts the contents of a mute-toggled bus message. Reads
the GstMixerTrack that has changed, and the new value of the mute
flag.
</p>
<p>
The GstMixerTrack remains valid until the message is freed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td>
<td>A mute-toggled change notification message.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>track</code></em> :</span></p></td>
<td>Pointer to hold a GstMixerTrack object, or NULL.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mute</code></em> :</span></p></td>
<td>A pointer to a gboolean variable, or NULL.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.14</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-message-parse-option-changed"></a><h3>gst_mixer_message_parse_option_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_message_parse_option_changed
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> **options</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **value</code></em>);</pre>
<p>
Extracts the GstMixerOptions and new value from a option-changed bus notification
message.
</p>
<p>
The options and value returned remain valid until the message is freed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td>
<td>A volume-changed change notification message.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>options</code></em> :</span></p></td>
<td>Pointer to hold a GstMixerOptions object, or NULL.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>Result location to receive the new options value, or NULL.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.14</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-message-parse-record-toggled"></a><h3>gst_mixer_message_parse_record_toggled ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_message_parse_record_toggled
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> **track</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *record</code></em>);</pre>
<p>
Extracts the contents of a record-toggled bus message. Reads
the GstMixerTrack that has changed, and the new value of the
recording flag.
</p>
<p>
The GstMixerTrack remains valid until the message is freed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td>
<td>A record-toggled change notification message.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>track</code></em> :</span></p></td>
<td>Pointer to hold a GstMixerTrack object, or NULL.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>record</code></em> :</span></p></td>
<td>A pointer to a gboolean variable, or NULL.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.14</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-message-parse-volume-changed"></a><h3>gst_mixer_message_parse_volume_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_message_parse_volume_changed
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> **track</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> **volumes</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> *num_channels</code></em>);</pre>
<p>
Parses a volume-changed notification message and extracts the track object
it refers to, as well as an array of volumes and the size of the volumes array.
</p>
<p>
The track object remains valid until the message is freed.
</p>
<p>
The caller must free the array returned in the volumes parameter using g_free
when they are done with it.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td>
<td>A volume-changed change notification message.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>track</code></em> :</span></p></td>
<td>Pointer to hold a GstMixerTrack object, or NULL.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>volumes</code></em> :</span></p></td>
<td>A pointer to receive an array of gint values, or NULL.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>num_channels</code></em> :</span></p></td>
<td>Result location to receive the number of channels, or NULL.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.14</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-mixer-message-parse-options-list-changed"></a><h3>gst_mixer_message_parse_options_list_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_mixer_message_parse_options_list_changed
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstMessage.html#GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> **options</code></em>);</pre>
<p>
Extracts the GstMixerOptions whose value list has changed from an
options-list-changed bus notification message.
</p>
<p>
The options object returned remains valid until the message is freed. You
do not need to unref it.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td>
<td>A volume-changed change notification message.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>options</code></em> :</span></p></td>
<td>Pointer to hold a GstMixerOptions object, or NULL.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.18</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstmixer.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GstMixer-mute-toggled"></a><h3>The <code class="literal">"mute-toggled"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *gstmixer,
<a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *arg1,
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> arg2,
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a></pre>
</div>
<hr>
<div class="refsect2">
<a name="GstMixer-option-changed"></a><h3>The <code class="literal">"option-changed"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *gstmixer,
<a class="link" href="gst-plugins-base-libs-gstmixeroptions.html#GstMixerOptions"><span class="type">GstMixerOptions</span></a> *arg1,
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *arg2,
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a></pre>
</div>
<hr>
<div class="refsect2">
<a name="GstMixer-record-toggled"></a><h3>The <code class="literal">"record-toggled"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *gstmixer,
<a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *arg1,
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> arg2,
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a></pre>
</div>
<hr>
<div class="refsect2">
<a name="GstMixer-volume-changed"></a><h3>The <code class="literal">"volume-changed"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *gstmixer,
<a class="link" href="gst-plugins-base-libs-gstmixertrack.html#GstMixerTrack"><span class="type">GstMixerTrack</span></a> *arg1,
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> arg2,
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a></pre>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstmixer.see-also"></a><h2>See Also</h2>
alsamixer, oss4mixer, sunaudiomixer
</div>
</div>
<div class="footer">
<hr>
Generated by GTK-Doc V1.18</div>
</body>
</html>
|