/usr/share/gtk-doc/html/gst-plugins-base-libs-0.10/gst-plugins-base-libs-gstringbuffer.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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>gstringbuffer</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-audio.html" title="Audio Library">
<link rel="prev" href="gst-plugins-base-libs-gstmultichannel.html" title="gstmultichannel">
<link rel="next" href="gst-plugins-base-libs-gstaudioiec61937.html" title="gstaudioiec61937">
<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-gstmultichannel.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="gstreamer-audio.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-gstaudioiec61937.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-gstringbuffer.synopsis" class="shortcut">Top</a>
|
<a href="#gst-plugins-base-libs-gstringbuffer.description" class="shortcut">Description</a>
|
<a href="#gst-plugins-base-libs-gstringbuffer.object-hierarchy" class="shortcut">Object Hierarchy</a>
</td></tr>
</table>
<div class="refentry">
<a name="gst-plugins-base-libs-gstringbuffer"></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-gstringbuffer.top_of_page"></a>gstringbuffer</span></h2>
<p>gstringbuffer — Base class for audio ringbuffer implementations</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="gst-plugins-base-libs-gstringbuffer.synopsis"></a><h2>Synopsis</h2>
<a name="GstRingBuffer"></a><pre class="synopsis">
#include <gst/audio/gstringbuffer.h>
struct <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer-struct" title="struct GstRingBuffer">GstRingBuffer</a>;
struct <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferClass" title="struct GstRingBufferClass">GstRingBufferClass</a>;
struct <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferSpec" title="struct GstRingBufferSpec">GstRingBufferSpec</a>;
<span class="returnvalue">void</span> (<a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferCallback" title="GstRingBufferCallback ()">*GstRingBufferCallback</a>) (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *rbuf</code></em>,
<em class="parameter"><code><span class="type">guint8</span> *data</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> len</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
enum <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferSegState" title="enum GstRingBufferSegState">GstRingBufferSegState</a>;
enum <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferState" title="enum GstRingBufferState">GstRingBufferState</a>;
enum <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstBufferFormat" title="enum GstBufferFormat">GstBufferFormat</a>;
enum <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstBufferFormatType" title="enum GstBufferFormatType">GstBufferFormatType</a>;
#define <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GST-RING-BUFFER-BROADCAST:CAPS" title="GST_RING_BUFFER_BROADCAST()">GST_RING_BUFFER_BROADCAST</a> (buf)
#define <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GST-RING-BUFFER-GET-COND:CAPS" title="GST_RING_BUFFER_GET_COND()">GST_RING_BUFFER_GET_COND</a> (buf)
#define <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GST-RING-BUFFER-SIGNAL:CAPS" title="GST_RING_BUFFER_SIGNAL()">GST_RING_BUFFER_SIGNAL</a> (buf)
#define <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GST-RING-BUFFER-WAIT:CAPS" title="GST_RING_BUFFER_WAIT()">GST_RING_BUFFER_WAIT</a> (buf)
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-set-callback" title="gst_ring_buffer_set_callback ()">gst_ring_buffer_set_callback</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferCallback" title="GstRingBufferCallback ()"><span class="type">GstRingBufferCallback</span></a> cb</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</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-gstringbuffer.html#gst-ring-buffer-acquire" title="gst_ring_buffer_acquire ()">gst_ring_buffer_acquire</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferSpec" title="struct GstRingBufferSpec"><span class="type">GstRingBufferSpec</span></a> *spec</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-gstringbuffer.html#gst-ring-buffer-release" title="gst_ring_buffer_release ()">gst_ring_buffer_release</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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-gstringbuffer.html#gst-ring-buffer-is-acquired" title="gst_ring_buffer_is_acquired ()">gst_ring_buffer_is_acquired</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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-gstringbuffer.html#gst-ring-buffer-activate" title="gst_ring_buffer_activate ()">gst_ring_buffer_activate</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> active</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-gstringbuffer.html#gst-ring-buffer-is-active" title="gst_ring_buffer_is_active ()">gst_ring_buffer_is_active</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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-gstringbuffer.html#gst-ring-buffer-start" title="gst_ring_buffer_start ()">gst_ring_buffer_start</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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-gstringbuffer.html#gst-ring-buffer-pause" title="gst_ring_buffer_pause ()">gst_ring_buffer_pause</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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-gstringbuffer.html#gst-ring-buffer-stop" title="gst_ring_buffer_stop ()">gst_ring_buffer_stop</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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-gstringbuffer.html#gst-ring-buffer-delay" title="gst_ring_buffer_delay ()">gst_ring_buffer_delay</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);
<span class="returnvalue">guint64</span> <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-samples-done" title="gst_ring_buffer_samples_done ()">gst_ring_buffer_samples_done</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-set-sample" title="gst_ring_buffer_set_sample ()">gst_ring_buffer_set_sample</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><span class="type">guint64</span> sample</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-gstringbuffer.html#gst-ring-buffer-commit" title="gst_ring_buffer_commit ()">gst_ring_buffer_commit</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><span class="type">guint64</span> sample</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"><span class="type">guchar</span></a> *data</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> len</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-gstringbuffer.html#gst-ring-buffer-commit-full" title="gst_ring_buffer_commit_full ()">gst_ring_buffer_commit_full</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><span class="type">guint64</span> *sample</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"><span class="type">guchar</span></a> *data</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> in_samples</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> out_samples</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> *accum</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-gstringbuffer.html#gst-ring-buffer-convert" title="gst_ring_buffer_convert ()">gst_ring_buffer_convert</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstFormat.html#GstFormat"><span class="type">GstFormat</span></a> src_fmt</code></em>,
<em class="parameter"><code><span class="type">gint64</span> src_val</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstFormat.html#GstFormat"><span class="type">GstFormat</span></a> dest_fmt</code></em>,
<em class="parameter"><code><span class="type">gint64</span> *dest_val</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-gstringbuffer.html#gst-ring-buffer-prepare-read" title="gst_ring_buffer_prepare_read ()">gst_ring_buffer_prepare_read</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> *segment</code></em>,
<em class="parameter"><code><span class="type">guint8</span> **readptr</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> *len</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-gstringbuffer.html#gst-ring-buffer-read" title="gst_ring_buffer_read ()">gst_ring_buffer_read</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><span class="type">guint64</span> sample</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"><span class="type">guchar</span></a> *data</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> len</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-clear" title="gst_ring_buffer_clear ()">gst_ring_buffer_clear</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> segment</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-clear-all" title="gst_ring_buffer_clear_all ()">gst_ring_buffer_clear_all</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-advance" title="gst_ring_buffer_advance ()">gst_ring_buffer_advance</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> advance</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-gstringbuffer.html#gst-ring-buffer-close-device" title="gst_ring_buffer_close_device ()">gst_ring_buffer_close_device</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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-gstringbuffer.html#gst-ring-buffer-open-device" title="gst_ring_buffer_open_device ()">gst_ring_buffer_open_device</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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-gstringbuffer.html#gst-ring-buffer-device-is-open" title="gst_ring_buffer_device_is_open ()">gst_ring_buffer_device_is_open</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-may-start" title="gst_ring_buffer_may_start ()">gst_ring_buffer_may_start</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> allowed</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-gstringbuffer.html#gst-ring-buffer-parse-caps" title="gst_ring_buffer_parse_caps ()">gst_ring_buffer_parse_caps</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferSpec" title="struct GstRingBufferSpec"><span class="type">GstRingBufferSpec</span></a> *spec</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> *caps</code></em>);
<span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-set-flushing" title="gst_ring_buffer_set_flushing ()">gst_ring_buffer_set_flushing</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> flushing</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstringbuffer.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----<a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstObject.html">GstObject</a>
+----GstRingBuffer
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstringbuffer.description"></a><h2>Description</h2>
<p>
</p>
<div class="refsect2">
<a name="idp12967152"></a><p>
This object is the base class for audio ringbuffers used by the base
audio source and sink classes.
</p>
<p>
The ringbuffer abstracts a circular buffer of data. One reader and
one writer can operate on the data from different threads in a lockfree
manner. The base class is sufficiently flexible to be used as an
abstraction for DMA based ringbuffers as well as a pure software
implementations.
</p>
</div>
<p>
</p>
<p>
Last reviewed on 2006-02-02 (0.10.4)
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstringbuffer.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstRingBuffer-struct"></a><h3>struct GstRingBuffer</h3>
<pre class="programlisting">struct GstRingBuffer {
GCond *cond;
gboolean open;
gboolean acquired;
GstBuffer *data;
GstRingBufferSpec spec;
GstRingBufferSegState *segstate;
gint samples_per_seg;
guint8 *empty_seg;
gint state;
gint segdone;
gint segbase;
gint waiting;
};
</pre>
<p>
The ringbuffer base class structure.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Threads.html#GCond"><span class="type">GCond</span></a> *<em class="structfield"><code><a name="GstRingBuffer-struct.cond"></a>cond</code></em>;</span></p></td>
<td>used to signal start/stop/pause/resume actions</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> <em class="structfield"><code><a name="GstRingBuffer-struct.open"></a>open</code></em>;</span></p></td>
<td>boolean indicating that the ringbuffer is open</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> <em class="structfield"><code><a name="GstRingBuffer-struct.acquired"></a>acquired</code></em>;</span></p></td>
<td>boolean indicating that the ringbuffer is acquired</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *<em class="structfield"><code><a name="GstRingBuffer-struct.data"></a>data</code></em>;</span></p></td>
<td>data in the ringbuffer</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferSpec" title="struct GstRingBufferSpec"><span class="type">GstRingBufferSpec</span></a> <em class="structfield"><code><a name="GstRingBuffer-struct.spec"></a>spec</code></em>;</span></p></td>
<td>format and layout of the ringbuffer data</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferSegState" title="enum GstRingBufferSegState"><span class="type">GstRingBufferSegState</span></a> *<em class="structfield"><code><a name="GstRingBuffer-struct.segstate"></a>segstate</code></em>;</span></p></td>
<td>status of each segment in the ringbuffer (unused)</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBuffer-struct.samples-per-seg"></a>samples_per_seg</code></em>;</span></p></td>
<td>number of samples in one segment</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">guint8</span> *<em class="structfield"><code><a name="GstRingBuffer-struct.empty-seg"></a>empty_seg</code></em>;</span></p></td>
<td>pointer to memory holding one segment of silence samples</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBuffer-struct.state"></a>state</code></em>;</span></p></td>
<td>state of the buffer</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBuffer-struct.segdone"></a>segdone</code></em>;</span></p></td>
<td>readpointer in the ringbuffer</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBuffer-struct.segbase"></a>segbase</code></em>;</span></p></td>
<td>segment corresponding to segment 0 (unused)</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBuffer-struct.waiting"></a>waiting</code></em>;</span></p></td>
<td>is a reader or writer waiting for a free segment</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstRingBufferClass"></a><h3>struct GstRingBufferClass</h3>
<pre class="programlisting">struct GstRingBufferClass {
GstObjectClass parent_class;
gboolean (*open_device) (GstRingBuffer *buf);
gboolean (*acquire) (GstRingBuffer *buf, GstRingBufferSpec *spec);
gboolean (*release) (GstRingBuffer *buf);
gboolean (*close_device) (GstRingBuffer *buf);
gboolean (*start) (GstRingBuffer *buf);
gboolean (*pause) (GstRingBuffer *buf);
gboolean (*resume) (GstRingBuffer *buf);
gboolean (*stop) (GstRingBuffer *buf);
guint (*delay) (GstRingBuffer *buf);
/* ABI added */
gboolean (*activate) (GstRingBuffer *buf, gboolean active);
guint (*commit) (GstRingBuffer * buf, guint64 *sample,
guchar * data, gint in_samples,
gint out_samples, gint * accum);
void (*clear_all) (GstRingBuffer * buf);
};
</pre>
<p>
The vmethods that subclasses can override to implement the ringbuffer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstObject.html#GstObjectClass"><span class="type">GstObjectClass</span></a> <em class="structfield"><code><a name="GstRingBufferClass.parent-class"></a>parent_class</code></em>;</span></p></td>
<td>parent class</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.open-device"></a>open_device</code></em> ()</span></p></td>
<td>open the device, don't set any params or allocate anything</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.acquire"></a>acquire</code></em> ()</span></p></td>
<td>allocate the resources for the ringbuffer using the given spec</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.release"></a>release</code></em> ()</span></p></td>
<td>free resources of the ringbuffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.close-device"></a>close_device</code></em> ()</span></p></td>
<td>close the device</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.start"></a>start</code></em> ()</span></p></td>
<td>start processing of samples</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.pause"></a>pause</code></em> ()</span></p></td>
<td>pause processing of samples</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.resume"></a>resume</code></em> ()</span></p></td>
<td>resume processing of samples after pause</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.stop"></a>stop</code></em> ()</span></p></td>
<td>stop processing of samples</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.delay"></a>delay</code></em> ()</span></p></td>
<td>get number of samples queued in device</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.activate"></a>activate</code></em> ()</span></p></td>
<td>activate the thread that starts pulling and monitoring the
consumed segments in the device. Since 0.10.22</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.commit"></a>commit</code></em> ()</span></p></td>
<td>write samples into the ringbuffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstRingBufferClass.clear-all"></a>clear_all</code></em> ()</span></p></td>
<td>clear the entire ringbuffer Since 0.10.24</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstRingBufferSpec"></a><h3>struct GstRingBufferSpec</h3>
<pre class="programlisting">struct GstRingBufferSpec {
/* in */
GstCaps *caps; /* the caps of the buffer */
/* in/out */
GstBufferFormatType type;
GstBufferFormat format;
gboolean sign;
gboolean bigend;
gint width;
gint depth;
gint rate;
gint channels;
guint64 latency_time; /* the required/actual latency time, this is the
* actual the size of one segment and the
* minimum possible latency we can achieve. */
guint64 buffer_time; /* the required/actual time of the buffer, this is
* the total size of the buffer and maximum
* latency we can compensate for. */
gint segsize; /* size of one buffer segment in bytes, this value
* should be chosen to match latency_time as
* well as possible. */
gint segtotal; /* total number of segments, this value is the
* number of segments of @segsize and should be
* chosen so that it matches buffer_time as
* close as possible. */
/* out */
gint bytes_per_sample; /* number of bytes of one sample */
guint8 silence_sample[32]; /* bytes representing silence */
/* ABI added 0.10.20 */
gint seglatency; /* number of segments queued in the lower
* level device, defaults to segtotal. */
};
</pre>
<p>
The structure containing the format specification of the ringbuffer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> *<em class="structfield"><code><a name="GstRingBufferSpec.caps"></a>caps</code></em>;</span></p></td>
<td>The caps that generated the Spec.</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstBufferFormatType" title="enum GstBufferFormatType"><span class="type">GstBufferFormatType</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.type"></a>type</code></em>;</span></p></td>
<td>the sample type</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstBufferFormat" title="enum GstBufferFormat"><span class="type">GstBufferFormat</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.format"></a>format</code></em>;</span></p></td>
<td>the sample format</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.sign"></a>sign</code></em>;</span></p></td>
<td>the sample sign</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.bigend"></a>bigend</code></em>;</span></p></td>
<td>the endianness of the samples</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.width"></a>width</code></em>;</span></p></td>
<td>the width of the samples</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.depth"></a>depth</code></em>;</span></p></td>
<td>th depth of the samples</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.rate"></a>rate</code></em>;</span></p></td>
<td>the samplerate</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.channels"></a>channels</code></em>;</span></p></td>
<td>the number of channels</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">guint64</span> <em class="structfield"><code><a name="GstRingBufferSpec.latency-time"></a>latency_time</code></em>;</span></p></td>
<td>the latency in microseconds</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">guint64</span> <em class="structfield"><code><a name="GstRingBufferSpec.buffer-time"></a>buffer_time</code></em>;</span></p></td>
<td>the total buffer size in microseconds</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.segsize"></a>segsize</code></em>;</span></p></td>
<td>the size of one segment in bytes</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.segtotal"></a>segtotal</code></em>;</span></p></td>
<td>the total number of segments</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.bytes-per-sample"></a>bytes_per_sample</code></em>;</span></p></td>
<td>number of bytes in one sample</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">guint8</span> <em class="structfield"><code><a name="GstRingBufferSpec.silence-sample"></a>silence_sample</code></em>[32];</span></p></td>
<td>bytes representing one sample of silence</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstRingBufferSpec.seglatency"></a>seglatency</code></em>;</span></p></td>
<td>number of segments queued in the lower level device,
defaults to segtotal</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstRingBufferCallback"></a><h3>GstRingBufferCallback ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> (*GstRingBufferCallback) (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *rbuf</code></em>,
<em class="parameter"><code><span class="type">guint8</span> *data</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> len</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>
This function is set with <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-set-callback" title="gst_ring_buffer_set_callback ()"><code class="function">gst_ring_buffer_set_callback()</code></a> and is
called to fill the memory at <em class="parameter"><code>data</code></em> with <em class="parameter"><code>len</code></em> bytes of samples.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>rbuf</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>target to fill</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>len</code></em> :</span></p></td>
<td>amount to fill</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstRingBufferSegState"></a><h3>enum GstRingBufferSegState</h3>
<pre class="programlisting">typedef enum {
GST_SEGSTATE_INVALID,
GST_SEGSTATE_EMPTY,
GST_SEGSTATE_FILLED,
GST_SEGSTATE_PARTIAL
} GstRingBufferSegState;
</pre>
<p>
The state of a segment in the ringbuffer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GST-SEGSTATE-INVALID:CAPS"></a><span class="term"><code class="literal">GST_SEGSTATE_INVALID</code></span></p></td>
<td>The content of the segment is invalid
</td>
</tr>
<tr>
<td><p><a name="GST-SEGSTATE-EMPTY:CAPS"></a><span class="term"><code class="literal">GST_SEGSTATE_EMPTY</code></span></p></td>
<td>The segment is empty
</td>
</tr>
<tr>
<td><p><a name="GST-SEGSTATE-FILLED:CAPS"></a><span class="term"><code class="literal">GST_SEGSTATE_FILLED</code></span></p></td>
<td>The segment contains valid data
</td>
</tr>
<tr>
<td><p><a name="GST-SEGSTATE-PARTIAL:CAPS"></a><span class="term"><code class="literal">GST_SEGSTATE_PARTIAL</code></span></p></td>
<td>The segment partially contains valid data
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstRingBufferState"></a><h3>enum GstRingBufferState</h3>
<pre class="programlisting">typedef enum {
GST_RING_BUFFER_STATE_STOPPED,
GST_RING_BUFFER_STATE_PAUSED,
GST_RING_BUFFER_STATE_STARTED
} GstRingBufferState;
</pre>
<p>
The state of the ringbuffer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GST-RING-BUFFER-STATE-STOPPED:CAPS"></a><span class="term"><code class="literal">GST_RING_BUFFER_STATE_STOPPED</code></span></p></td>
<td>The ringbuffer is stopped
</td>
</tr>
<tr>
<td><p><a name="GST-RING-BUFFER-STATE-PAUSED:CAPS"></a><span class="term"><code class="literal">GST_RING_BUFFER_STATE_PAUSED</code></span></p></td>
<td>The ringbuffer is paused
</td>
</tr>
<tr>
<td><p><a name="GST-RING-BUFFER-STATE-STARTED:CAPS"></a><span class="term"><code class="literal">GST_RING_BUFFER_STATE_STARTED</code></span></p></td>
<td>The ringbuffer is started
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstBufferFormat"></a><h3>enum GstBufferFormat</h3>
<pre class="programlisting">typedef enum {
GST_UNKNOWN,
GST_S8,
GST_U8,
GST_S16_LE,
GST_S16_BE,
GST_U16_LE,
GST_U16_BE,
GST_S24_LE,
GST_S24_BE,
GST_U24_LE,
GST_U24_BE,
GST_S32_LE,
GST_S32_BE,
GST_U32_LE,
GST_U32_BE,
GST_S24_3LE,
GST_S24_3BE,
GST_U24_3LE,
GST_U24_3BE,
GST_S20_3LE,
GST_S20_3BE,
GST_U20_3LE,
GST_U20_3BE,
GST_S18_3LE,
GST_S18_3BE,
GST_U18_3LE,
GST_U18_3BE,
GST_FLOAT32_LE,
GST_FLOAT32_BE,
GST_FLOAT64_LE,
GST_FLOAT64_BE,
GST_MU_LAW,
GST_A_LAW,
GST_IMA_ADPCM,
GST_MPEG,
GST_GSM,
GST_IEC958,
GST_AC3,
GST_EAC3,
GST_DTS,
GST_MPEG2_AAC,
GST_MPEG4_AAC,
} GstBufferFormat;
</pre>
<p>
The detailed format of the samples in the ringbuffer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GST-UNKNOWN:CAPS"></a><span class="term"><code class="literal">GST_UNKNOWN</code></span></p></td>
<td>unspecified
</td>
</tr>
<tr>
<td><p><a name="GST-S8:CAPS"></a><span class="term"><code class="literal">GST_S8</code></span></p></td>
<td>integer signed 8 bit
</td>
</tr>
<tr>
<td><p><a name="GST-U8:CAPS"></a><span class="term"><code class="literal">GST_U8</code></span></p></td>
<td>integer unsigned 8 bit
</td>
</tr>
<tr>
<td><p><a name="GST-S16-LE:CAPS"></a><span class="term"><code class="literal">GST_S16_LE</code></span></p></td>
<td>integer signed 16 bit little endian
</td>
</tr>
<tr>
<td><p><a name="GST-S16-BE:CAPS"></a><span class="term"><code class="literal">GST_S16_BE</code></span></p></td>
<td>integer signed 16 bit big endian
</td>
</tr>
<tr>
<td><p><a name="GST-U16-LE:CAPS"></a><span class="term"><code class="literal">GST_U16_LE</code></span></p></td>
<td>integer unsigned 16 bit little endian
</td>
</tr>
<tr>
<td><p><a name="GST-U16-BE:CAPS"></a><span class="term"><code class="literal">GST_U16_BE</code></span></p></td>
<td>integer unsigned 16 bit big endian
</td>
</tr>
<tr>
<td><p><a name="GST-S24-LE:CAPS"></a><span class="term"><code class="literal">GST_S24_LE</code></span></p></td>
<td>integer signed 24 bit little endian
</td>
</tr>
<tr>
<td><p><a name="GST-S24-BE:CAPS"></a><span class="term"><code class="literal">GST_S24_BE</code></span></p></td>
<td>integer signed 24 bit big endian
</td>
</tr>
<tr>
<td><p><a name="GST-U24-LE:CAPS"></a><span class="term"><code class="literal">GST_U24_LE</code></span></p></td>
<td>integer unsigned 24 bit little endian
</td>
</tr>
<tr>
<td><p><a name="GST-U24-BE:CAPS"></a><span class="term"><code class="literal">GST_U24_BE</code></span></p></td>
<td>integer unsigned 24 bit big endian
</td>
</tr>
<tr>
<td><p><a name="GST-S32-LE:CAPS"></a><span class="term"><code class="literal">GST_S32_LE</code></span></p></td>
<td>integer signed 32 bit little endian
</td>
</tr>
<tr>
<td><p><a name="GST-S32-BE:CAPS"></a><span class="term"><code class="literal">GST_S32_BE</code></span></p></td>
<td>integer signed 32 bit big endian
</td>
</tr>
<tr>
<td><p><a name="GST-U32-LE:CAPS"></a><span class="term"><code class="literal">GST_U32_LE</code></span></p></td>
<td>integer unsigned 32 bit little endian
</td>
</tr>
<tr>
<td><p><a name="GST-U32-BE:CAPS"></a><span class="term"><code class="literal">GST_U32_BE</code></span></p></td>
<td>integer unsigned 32 bit big endian
</td>
</tr>
<tr>
<td><p><a name="GST-S24-3LE:CAPS"></a><span class="term"><code class="literal">GST_S24_3LE</code></span></p></td>
<td>integer signed 24 bit little endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-S24-3BE:CAPS"></a><span class="term"><code class="literal">GST_S24_3BE</code></span></p></td>
<td>integer signed 24 bit big endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-U24-3LE:CAPS"></a><span class="term"><code class="literal">GST_U24_3LE</code></span></p></td>
<td>integer unsigned 24 bit little endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-U24-3BE:CAPS"></a><span class="term"><code class="literal">GST_U24_3BE</code></span></p></td>
<td>integer unsigned 24 bit big endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-S20-3LE:CAPS"></a><span class="term"><code class="literal">GST_S20_3LE</code></span></p></td>
<td>integer signed 20 bit little endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-S20-3BE:CAPS"></a><span class="term"><code class="literal">GST_S20_3BE</code></span></p></td>
<td>integer signed 20 bit big endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-U20-3LE:CAPS"></a><span class="term"><code class="literal">GST_U20_3LE</code></span></p></td>
<td>integer unsigned 20 bit little endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-U20-3BE:CAPS"></a><span class="term"><code class="literal">GST_U20_3BE</code></span></p></td>
<td>integer unsigned 20 bit big endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-S18-3LE:CAPS"></a><span class="term"><code class="literal">GST_S18_3LE</code></span></p></td>
<td>integer signed 18 bit little endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-S18-3BE:CAPS"></a><span class="term"><code class="literal">GST_S18_3BE</code></span></p></td>
<td>integer signed 18 bit big endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-U18-3LE:CAPS"></a><span class="term"><code class="literal">GST_U18_3LE</code></span></p></td>
<td>integer unsigned 18 bit little endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-U18-3BE:CAPS"></a><span class="term"><code class="literal">GST_U18_3BE</code></span></p></td>
<td>integer unsigned 18 bit big endian packed in 3 bytes
</td>
</tr>
<tr>
<td><p><a name="GST-FLOAT32-LE:CAPS"></a><span class="term"><code class="literal">GST_FLOAT32_LE</code></span></p></td>
<td>floating 32 bit little endian
</td>
</tr>
<tr>
<td><p><a name="GST-FLOAT32-BE:CAPS"></a><span class="term"><code class="literal">GST_FLOAT32_BE</code></span></p></td>
<td>floating 32 bit big endian
</td>
</tr>
<tr>
<td><p><a name="GST-FLOAT64-LE:CAPS"></a><span class="term"><code class="literal">GST_FLOAT64_LE</code></span></p></td>
<td>floating 64 bit little endian
</td>
</tr>
<tr>
<td><p><a name="GST-FLOAT64-BE:CAPS"></a><span class="term"><code class="literal">GST_FLOAT64_BE</code></span></p></td>
<td>floating 64 bit big endian
</td>
</tr>
<tr>
<td><p><a name="GST-MU-LAW:CAPS"></a><span class="term"><code class="literal">GST_MU_LAW</code></span></p></td>
<td>mu-law
</td>
</tr>
<tr>
<td><p><a name="GST-A-LAW:CAPS"></a><span class="term"><code class="literal">GST_A_LAW</code></span></p></td>
<td>a-law
</td>
</tr>
<tr>
<td><p><a name="GST-IMA-ADPCM:CAPS"></a><span class="term"><code class="literal">GST_IMA_ADPCM</code></span></p></td>
<td>ima adpcm
</td>
</tr>
<tr>
<td><p><a name="GST-MPEG:CAPS"></a><span class="term"><code class="literal">GST_MPEG</code></span></p></td>
<td>mpeg audio (but not aac)
</td>
</tr>
<tr>
<td><p><a name="GST-GSM:CAPS"></a><span class="term"><code class="literal">GST_GSM</code></span></p></td>
<td>gsm
</td>
</tr>
<tr>
<td><p><a name="GST-IEC958:CAPS"></a><span class="term"><code class="literal">GST_IEC958</code></span></p></td>
<td>IEC958 frames
</td>
</tr>
<tr>
<td><p><a name="GST-AC3:CAPS"></a><span class="term"><code class="literal">GST_AC3</code></span></p></td>
<td>ac3
</td>
</tr>
<tr>
<td><p><a name="GST-EAC3:CAPS"></a><span class="term"><code class="literal">GST_EAC3</code></span></p></td>
<td>eac3
</td>
</tr>
<tr>
<td><p><a name="GST-DTS:CAPS"></a><span class="term"><code class="literal">GST_DTS</code></span></p></td>
<td>dts
</td>
</tr>
<tr>
<td><p><a name="GST-MPEG2-AAC:CAPS"></a><span class="term"><code class="literal">GST_MPEG2_AAC</code></span></p></td>
<td>mpeg-2 aac
</td>
</tr>
<tr>
<td><p><a name="GST-MPEG4-AAC:CAPS"></a><span class="term"><code class="literal">GST_MPEG4_AAC</code></span></p></td>
<td>mpeg-4 aac
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstBufferFormatType"></a><h3>enum GstBufferFormatType</h3>
<pre class="programlisting">typedef enum {
GST_BUFTYPE_LINEAR,
GST_BUFTYPE_FLOAT,
GST_BUFTYPE_MU_LAW,
GST_BUFTYPE_A_LAW,
GST_BUFTYPE_IMA_ADPCM,
GST_BUFTYPE_MPEG,
GST_BUFTYPE_GSM,
GST_BUFTYPE_IEC958,
GST_BUFTYPE_AC3,
GST_BUFTYPE_EAC3,
GST_BUFTYPE_DTS,
GST_BUFTYPE_MPEG2_AAC,
GST_BUFTYPE_MPEG4_AAC,
} GstBufferFormatType;
</pre>
<p>
The format of the samples in the ringbuffer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GST-BUFTYPE-LINEAR:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_LINEAR</code></span></p></td>
<td>samples in linear PCM
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-FLOAT:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_FLOAT</code></span></p></td>
<td>samples in float
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-MU-LAW:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_MU_LAW</code></span></p></td>
<td>samples in mulaw
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-A-LAW:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_A_LAW</code></span></p></td>
<td>samples in alaw
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-IMA-ADPCM:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_IMA_ADPCM</code></span></p></td>
<td>samples in ima adpcm
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-MPEG:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_MPEG</code></span></p></td>
<td>samples in mpeg audio (but not AAC) format
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-GSM:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_GSM</code></span></p></td>
<td>samples in gsm format
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-IEC958:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_IEC958</code></span></p></td>
<td>samples in IEC958 frames (e.g. AC3)
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-AC3:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_AC3</code></span></p></td>
<td>samples in AC3 format
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-EAC3:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_EAC3</code></span></p></td>
<td>samples in EAC3 format
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-DTS:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_DTS</code></span></p></td>
<td>samples in DTS format
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-MPEG2-AAC:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_MPEG2_AAC</code></span></p></td>
<td>samples in MPEG-2 AAC format
</td>
</tr>
<tr>
<td><p><a name="GST-BUFTYPE-MPEG4-AAC:CAPS"></a><span class="term"><code class="literal">GST_BUFTYPE_MPEG4_AAC</code></span></p></td>
<td>samples in MPEG-4 AAC format
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-RING-BUFFER-BROADCAST:CAPS"></a><h3>GST_RING_BUFFER_BROADCAST()</h3>
<pre class="programlisting">#define GST_RING_BUFFER_BROADCAST(buf)(g_cond_broadcast (GST_RING_BUFFER_GET_COND (buf)))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-RING-BUFFER-GET-COND:CAPS"></a><h3>GST_RING_BUFFER_GET_COND()</h3>
<pre class="programlisting">#define GST_RING_BUFFER_GET_COND(buf) (((GstRingBuffer *)buf)->cond)
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-RING-BUFFER-SIGNAL:CAPS"></a><h3>GST_RING_BUFFER_SIGNAL()</h3>
<pre class="programlisting">#define GST_RING_BUFFER_SIGNAL(buf) (g_cond_signal (GST_RING_BUFFER_GET_COND (buf)))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-RING-BUFFER-WAIT:CAPS"></a><h3>GST_RING_BUFFER_WAIT()</h3>
<pre class="programlisting">#define GST_RING_BUFFER_WAIT(buf) (g_cond_wait (GST_RING_BUFFER_GET_COND (buf), GST_OBJECT_GET_LOCK (buf)))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-set-callback"></a><h3>gst_ring_buffer_set_callback ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_ring_buffer_set_callback (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferCallback" title="GstRingBufferCallback ()"><span class="type">GstRingBufferCallback</span></a> cb</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>
Sets the given callback function on the buffer. This function
will be called every time a segment has been written to a device.
</p>
<p>
MT safe.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to set the callback on</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>cb</code></em> :</span></p></td>
<td>the callback to set</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data passed to the callback</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-acquire"></a><h3>gst_ring_buffer_acquire ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_acquire (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferSpec" title="struct GstRingBufferSpec"><span class="type">GstRingBufferSpec</span></a> *spec</code></em>);</pre>
<p>
Allocate the resources for the ringbuffer. This function fills
in the data pointer of the ring buffer with a valid <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a>
to which samples can be written.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to acquire</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>spec</code></em> :</span></p></td>
<td>the specs of the buffer</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the device could be acquired, FALSE on error.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-release"></a><h3>gst_ring_buffer_release ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_release (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Free the resources of the ringbuffer.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to release</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the device could be released, FALSE on error.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-is-acquired"></a><h3>gst_ring_buffer_is_acquired ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_is_acquired (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Check if the ringbuffer is acquired and ready to use.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to check</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the ringbuffer is acquired, FALSE on error.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-activate"></a><h3>gst_ring_buffer_activate ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_activate (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> active</code></em>);</pre>
<p>
Activate <em class="parameter"><code>buf</code></em> to start or stop pulling data.
</p>
<p>
MT safe.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to activate</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>active</code></em> :</span></p></td>
<td>the new mode</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the device could be activated in the requested mode,
FALSE on error.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.22.</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-is-active"></a><h3>gst_ring_buffer_is_active ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_is_active (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Check if <em class="parameter"><code>buf</code></em> is activated.
</p>
<p>
MT safe.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the device is active.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.22.</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-start"></a><h3>gst_ring_buffer_start ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_start (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Start processing samples from the ringbuffer.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to start</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the device could be started, FALSE on error.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-pause"></a><h3>gst_ring_buffer_pause ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_pause (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Pause processing samples from the ringbuffer.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to pause</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the device could be paused, FALSE on error.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-stop"></a><h3>gst_ring_buffer_stop ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_stop (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Stop processing samples from the ringbuffer.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to stop</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the device could be stopped, FALSE on error.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-delay"></a><h3>gst_ring_buffer_delay ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_ring_buffer_delay (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Get the number of samples queued in the audio device. This is
usually less than the segment size but can be bigger when the
implementation uses another internal buffer between the audio
device.
</p>
<p>
For playback ringbuffers this is the amount of samples transfered from the
ringbuffer to the device but still not played.
</p>
<p>
For capture ringbuffers this is the amount of samples in the device that are
not yet transfered to the ringbuffer.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to query</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The number of samples queued in the audio device.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-samples-done"></a><h3>gst_ring_buffer_samples_done ()</h3>
<pre class="programlisting"><span class="returnvalue">guint64</span> gst_ring_buffer_samples_done (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Get the number of samples that were processed by the ringbuffer
since it was last started. This does not include the number of samples not
yet processed (see <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-delay" title="gst_ring_buffer_delay ()"><code class="function">gst_ring_buffer_delay()</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>buf</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to query</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The number of samples processed by the ringbuffer.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-set-sample"></a><h3>gst_ring_buffer_set_sample ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_ring_buffer_set_sample (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><span class="type">guint64</span> sample</code></em>);</pre>
<p>
Make sure that the next sample written to the device is
accounted for as being the <em class="parameter"><code>sample</code></em> sample written to the
device. This value will be used in reporting the current
sample position of the ringbuffer.
</p>
<p>
This function will also clear the buffer with silence.
</p>
<p>
MT safe.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to use</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>sample</code></em> :</span></p></td>
<td>the sample number to set</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-commit"></a><h3>gst_ring_buffer_commit ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_ring_buffer_commit (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><span class="type">guint64</span> sample</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"><span class="type">guchar</span></a> *data</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> len</code></em>);</pre>
<p>
Same as <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-commit-full" title="gst_ring_buffer_commit_full ()"><code class="function">gst_ring_buffer_commit_full()</code></a> but with a in_samples and out_samples
equal to <em class="parameter"><code>len</code></em>, ignoring accum.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to commit</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>sample</code></em> :</span></p></td>
<td>the sample position of the data</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>the data to commit</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>len</code></em> :</span></p></td>
<td>the number of samples in the data to commit</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The number of samples written to the ringbuffer or -1 on
error.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-commit-full"></a><h3>gst_ring_buffer_commit_full ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_ring_buffer_commit_full (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><span class="type">guint64</span> *sample</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"><span class="type">guchar</span></a> *data</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> in_samples</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> out_samples</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> *accum</code></em>);</pre>
<p>
Commit <em class="parameter"><code>in_samples</code></em> samples pointed to by <em class="parameter"><code>data</code></em> to the ringbuffer <em class="parameter"><code>buf</code></em>.
</p>
<p>
<em class="parameter"><code>in_samples</code></em> and <em class="parameter"><code>out_samples</code></em> define the rate conversion to perform on the
samples in <em class="parameter"><code>data</code></em>. For negative rates, <em class="parameter"><code>out_samples</code></em> must be negative and
<em class="parameter"><code>in_samples</code></em> positive.
</p>
<p>
When <em class="parameter"><code>out_samples</code></em> is positive, the first sample will be written at position <em class="parameter"><code>sample</code></em>
in the ringbuffer. When <em class="parameter"><code>out_samples</code></em> is negative, the last sample will be written to
<em class="parameter"><code>sample</code></em> in reverse order.
</p>
<p>
<em class="parameter"><code>out_samples</code></em> does not need to be a multiple of the segment size of the ringbuffer
although it is recommended for optimal performance.
</p>
<p>
<em class="parameter"><code>accum</code></em> will hold a temporary accumulator used in rate conversion and should be
set to 0 when this function is first called. In case the commit operation is
interrupted, one can resume the processing by passing the previously returned
<em class="parameter"><code>accum</code></em> value back to this function.
</p>
<p>
MT safe.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to commit</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>sample</code></em> :</span></p></td>
<td>the sample position of the data</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>the data to commit</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>in_samples</code></em> :</span></p></td>
<td>the number of samples in the data to commit</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out_samples</code></em> :</span></p></td>
<td>the number of samples to write to the ringbuffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>accum</code></em> :</span></p></td>
<td>accumulator for rate conversion.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The number of samples written to the ringbuffer or -1 on error. The
number of samples written can be less than <em class="parameter"><code>out_samples</code></em> when <em class="parameter"><code>buf</code></em> was interrupted
with a flush or stop.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.11.</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-convert"></a><h3>gst_ring_buffer_convert ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_convert (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstFormat.html#GstFormat"><span class="type">GstFormat</span></a> src_fmt</code></em>,
<em class="parameter"><code><span class="type">gint64</span> src_val</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstFormat.html#GstFormat"><span class="type">GstFormat</span></a> dest_fmt</code></em>,
<em class="parameter"><code><span class="type">gint64</span> *dest_val</code></em>);</pre>
<p>
Convert <em class="parameter"><code>src_val</code></em> in <em class="parameter"><code>src_fmt</code></em> to the equivalent value in <em class="parameter"><code>dest_fmt</code></em>. The result
will be put in <em class="parameter"><code>dest_val</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>src_fmt</code></em> :</span></p></td>
<td>the source format</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>src_val</code></em> :</span></p></td>
<td>the source value</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dest_fmt</code></em> :</span></p></td>
<td>the destination format</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dest_val</code></em> :</span></p></td>
<td>a location to store the converted value</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the conversion succeeded.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.22.</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-prepare-read"></a><h3>gst_ring_buffer_prepare_read ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_prepare_read (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> *segment</code></em>,
<em class="parameter"><code><span class="type">guint8</span> **readptr</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> *len</code></em>);</pre>
<p>
Returns a pointer to memory where the data from segment <em class="parameter"><code>segment</code></em>
can be found. This function is mostly used by subclasses.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to read from</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>segment</code></em> :</span></p></td>
<td>the segment to read</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>readptr</code></em> :</span></p></td>
<td>the pointer to the memory where samples can be read</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>len</code></em> :</span></p></td>
<td>the number of bytes to read</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>FALSE if the buffer is not started.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-read"></a><h3>gst_ring_buffer_read ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_ring_buffer_read (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>,
<em class="parameter"><code><span class="type">guint64</span> sample</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"><span class="type">guchar</span></a> *data</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> len</code></em>);</pre>
<p>
Read <em class="parameter"><code>len</code></em> samples from the ringbuffer into the memory pointed
to by <em class="parameter"><code>data</code></em>.
The first sample should be read from position <em class="parameter"><code>sample</code></em> in
the ringbuffer.
</p>
<p>
<em class="parameter"><code>len</code></em> should not be a multiple of the segment size of the ringbuffer
although it is recommended.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to read from</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>sample</code></em> :</span></p></td>
<td>the sample position of the data</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>where the data should be read</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>len</code></em> :</span></p></td>
<td>the number of samples in data to read</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The number of samples read from the ringbuffer or -1 on
error.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-clear"></a><h3>gst_ring_buffer_clear ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_ring_buffer_clear (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> segment</code></em>);</pre>
<p>
Clear the given segment of the buffer with silence samples.
This function is used by subclasses.
</p>
<p>
MT safe.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to clear</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>segment</code></em> :</span></p></td>
<td>the segment to clear</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-clear-all"></a><h3>gst_ring_buffer_clear_all ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_ring_buffer_clear_all (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Fill the ringbuffer with silence.
</p>
<p>
MT safe.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to clear</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-advance"></a><h3>gst_ring_buffer_advance ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_ring_buffer_advance (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> advance</code></em>);</pre>
<p>
Subclasses should call this function to notify the fact that
<em class="parameter"><code>advance</code></em> segments are now processed by the device.
</p>
<p>
MT safe.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to advance</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>advance</code></em> :</span></p></td>
<td>the number of segments written</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-close-device"></a><h3>gst_ring_buffer_close_device ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_close_device (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Close the audio device associated with the ring buffer. The ring buffer
should already have been released via <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#gst-ring-buffer-release" title="gst_ring_buffer_release ()"><code class="function">gst_ring_buffer_release()</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>buf</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the device could be closed, FALSE on error.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-open-device"></a><h3>gst_ring_buffer_open_device ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_open_device (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Open the audio device associated with the ring buffer. Does not perform any
setup on the device. You must open the device before acquiring the ring
buffer.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the device could be opened, FALSE on error.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-device-is-open"></a><h3>gst_ring_buffer_device_is_open ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_device_is_open (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</code></em>);</pre>
<p>
Checks the status of the device associated with the ring buffer.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the device was open, FALSE if it was closed.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-may-start"></a><h3>gst_ring_buffer_may_start ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_ring_buffer_may_start (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> allowed</code></em>);</pre>
<p>
Tell the ringbuffer that it is allowed to start playback when
the ringbuffer is filled with samples.
</p>
<p>
MT safe.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>allowed</code></em> :</span></p></td>
<td>the new value</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.6</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-parse-caps"></a><h3>gst_ring_buffer_parse_caps ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_ring_buffer_parse_caps (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBufferSpec" title="struct GstRingBufferSpec"><span class="type">GstRingBufferSpec</span></a> *spec</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> *caps</code></em>);</pre>
<p>
Parse <em class="parameter"><code>caps</code></em> into <em class="parameter"><code>spec</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>spec</code></em> :</span></p></td>
<td>a spec</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>caps</code></em> :</span></p></td>
<td>a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the caps could be parsed.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-ring-buffer-set-flushing"></a><h3>gst_ring_buffer_set_flushing ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_ring_buffer_set_flushing (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> *buf</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> flushing</code></em>);</pre>
<p>
Set the ringbuffer to flushing mode or normal mode.
</p>
<p>
MT safe.
</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>the <a class="link" href="gst-plugins-base-libs-gstringbuffer.html#GstRingBuffer"><span class="type">GstRingBuffer</span></a> to flush</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flushing</code></em> :</span></p></td>
<td>the new mode</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstringbuffer.see-also"></a><h2>See Also</h2>
<a class="link" href="gst-plugins-base-libs-gstbaseaudiosink.html#GstBaseAudioSink"><span class="type">GstBaseAudioSink</span></a>, <a class="link" href="gst-plugins-base-libs-gstaudiosink.html#GstAudioSink"><span class="type">GstAudioSink</span></a>
</div>
</div>
<div class="footer">
<hr>
Generated by GTK-Doc V1.18</div>
</body>
</html>
|