1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>audiotestsrc: GStreamer Base Plugins 1.0 Plugins Reference Manual</title> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Plugins Reference Manual"> 8<link rel="up" href="ch01.html" title="gst-plugins-base Elements"> 9<link rel="prev" href="gst-plugins-base-plugins-audioresample.html" title="audioresample"> 10<link rel="next" href="gst-plugins-base-plugins-cdparanoiasrc.html" title="cdparanoiasrc"> 11<meta name="generator" content="GTK-Doc V1.28 (XML mode)"> 12<link rel="stylesheet" href="style.css" type="text/css"> 13</head> 14<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 15<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> 16<td 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href="gst-plugins-base-plugins-cdparanoiasrc.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> 26</tr></table> 27<div class="refentry"> 28<a name="gst-plugins-base-plugins-audiotestsrc"></a><div class="titlepage"></div> 29<div class="refnamediv"><table width="100%"><tr> 30<td valign="top"> 31<h2><span class="refentrytitle"><a name="gst-plugins-base-plugins-audiotestsrc.top_of_page"></a>audiotestsrc</span></h2> 32<p>audiotestsrc</p> 33</td> 34<td class="gallery_image" valign="top" align="right"></td> 35</tr></table></div> 36<div class="refsect1"> 37<a name="gst-plugins-base-plugins-audiotestsrc.properties"></a><h2>Properties</h2> 38<div class="informaltable"><table class="informaltable" border="0"> 39<colgroup> 40<col width="150px" class="properties_type"> 41<col width="300px" class="properties_name"> 42<col width="200px" class="properties_flags"> 43</colgroup> 44<tbody> 45<tr> 46<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> 47<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--can-activate-pull" title="The “can-activate-pull” property">can-activate-pull</a></td> 48<td class="property_flags">Read / Write</td> 49</tr> 50<tr> 51<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> 52<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--can-activate-push" title="The “can-activate-push” property">can-activate-push</a></td> 53<td class="property_flags">Read / Write</td> 54</tr> 55<tr> 56<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></td> 57<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--freq" title="The “freq” property">freq</a></td> 58<td class="property_flags">Read / Write</td> 59</tr> 60<tr> 61<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> 62<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--is-live" title="The “is-live” property">is-live</a></td> 63<td class="property_flags">Read / Write</td> 64</tr> 65<tr> 66<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a></td> 67<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--samplesperbuffer" title="The “samplesperbuffer” property">samplesperbuffer</a></td> 68<td class="property_flags">Read / Write</td> 69</tr> 70<tr> 71<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a></td> 72<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--timestamp-offset" title="The “timestamp-offset” property">timestamp-offset</a></td> 73<td class="property_flags">Read / Write</td> 74</tr> 75<tr> 76<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></td> 77<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--volume" title="The “volume” property">volume</a></td> 78<td class="property_flags">Read / Write</td> 79</tr> 80<tr> 81<td class="property_type"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrcWave" title="enum GstAudioTestSrcWave"><span class="type">GstAudioTestSrcWave</span></a></td> 82<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--wave" title="The “wave” property">wave</a></td> 83<td class="property_flags">Read / Write</td> 84</tr> 85<tr> 86<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> 87<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--apply-tick-ramp" title="The “apply-tick-ramp” property">apply-tick-ramp</a></td> 88<td class="property_flags">Read / Write</td> 89</tr> 90<tr> 91<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a></td> 92<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--marker-tick-period" title="The “marker-tick-period” property">marker-tick-period</a></td> 93<td class="property_flags">Read / Write</td> 94</tr> 95<tr> 96<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></td> 97<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--marker-tick-volume" title="The “marker-tick-volume” property">marker-tick-volume</a></td> 98<td class="property_flags">Read / Write</td> 99</tr> 100<tr> 101<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a></td> 102<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--sine-periods-per-tick" title="The “sine-periods-per-tick” property">sine-periods-per-tick</a></td> 103<td class="property_flags">Read / Write</td> 104</tr> 105<tr> 106<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a></td> 107<td class="property_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--tick-interval" title="The “tick-interval” property">tick-interval</a></td> 108<td class="property_flags">Read / Write</td> 109</tr> 110</tbody> 111</table></div> 112</div> 113<a name="GstAudioTestSrc"></a><div class="refsect1"> 114<a name="gst-plugins-base-plugins-audiotestsrc.other"></a><h2>Types and Values</h2> 115<div class="informaltable"><table class="informaltable" width="100%" border="0"> 116<colgroup> 117<col width="150px" class="name"> 118<col class="description"> 119</colgroup> 120<tbody> 121<tr> 122<td class="datatype_keyword">struct</td> 123<td class="function_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc-struct" title="struct GstAudioTestSrc">GstAudioTestSrc</a></td> 124</tr> 125<tr> 126<td class="datatype_keyword">enum</td> 127<td class="function_name"><a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrcWave" title="enum GstAudioTestSrcWave">GstAudioTestSrcWave</a></td> 128</tr> 129</tbody> 130</table></div> 131</div> 132<div class="refsect1"> 133<a name="gst-plugins-base-plugins-audiotestsrc.object-hierarchy"></a><h2>Object Hierarchy</h2> 134<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a> 135 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> 136 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html#GstObject-struct">GstObject</a> 137 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html#GstElement-struct">GstElement</a> 138 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstBaseSrc.html#GstBaseSrc-struct">GstBaseSrc</a> 139 <span class="lineart">╰──</span> GstAudioTestSrc 140</pre> 141</div> 142<div class="refsect1"> 143<a name="gst-plugins-base-plugins-audiotestsrc.description"></a><h2>Description</h2> 144<p>AudioTestSrc can be used to generate basic audio signals. It support several 145different waveforms and allows to set the base frequency and volume. Some 146waveforms might use additional properties.</p> 147<p>Waveform specific notes:</p> 148<div class="orderedlist"><ol class="orderedlist" type="1"> 149<li class="listitem"><div class="itemizedlist"> 150<p class="title"><b>Gaussian white noise</b></p> 151<ul class="itemizedlist" style="list-style-type: disc; "></ul> 152</div></li> 153<li class="listitem"><div class="itemizedlist"> 154<p class="title"><b>Ticks</b></p> 155<ul class="itemizedlist" style="list-style-type: disc; "></ul> 156</div></li> 157</ol></div> 158<div class="refsect3"> 159<a name="id-1.2.13.7.5"></a><h4>Example launch line</h4> 160<div class="informalexample"> 161 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 162 <tbody> 163 <tr> 164 <td class="listing_lines" align="right"><pre>1</pre></td> 165 <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> audiotestsrc <span class="gtkdoc opt">!</span> audioconvert <span class="gtkdoc opt">!</span> autoaudiosink</pre></td> 166 </tr> 167 </tbody> 168 </table> 169</div> 170 171<p> 172 This pipeline produces a sine with default frequency, 440 Hz, and the 173default volume, 0.8 (relative to a maximum 1.0).</p> 174<div class="informalexample"> 175 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 176 <tbody> 177 <tr> 178 <td class="listing_lines" align="right"><pre>1 1792</pre></td> 180 <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> audiotestsrc wave<span class="gtkdoc opt">=</span><span class="number">2</span> freq<span class="gtkdoc opt">=</span><span class="number">200</span> <span class="gtkdoc opt">!</span> tee name<span class="gtkdoc opt">=</span>t <span class="gtkdoc opt">!</span> queue <span class="gtkdoc opt">!</span> audioconvert <span class="gtkdoc opt">!</span> \ 181 autoaudiosink t<span class="gtkdoc opt">. !</span> queue <span class="gtkdoc opt">!</span> audioconvert <span class="gtkdoc opt">!</span> libvisual_lv_scope <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> autovideosink</pre></td> 182 </tr> 183 </tbody> 184 </table> 185</div> 186 187<p> 188 In this example a saw wave is generated. The wave is shown using a 189scope visualizer from libvisual, allowing you to visually verify that 190the saw wave is correct.</p> 191<div class="informalexample"> 192 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 193 <tbody> 194 <tr> 195 <td class="listing_lines" align="right"><pre>1 1962</pre></td> 197 <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> audiotestsrc wave<span class="gtkdoc opt">=</span>ticks apply<span class="gtkdoc opt">-</span>tick<span class="gtkdoc opt">-</span>ramp<span class="gtkdoc opt">=</span><span class="keyword">true</span> tick<span class="gtkdoc opt">-</span>interval<span class="gtkdoc opt">=</span><span class="number">100000000</span> \ 198 freq<span class="gtkdoc opt">=</span><span class="number">10000</span> volume<span class="gtkdoc opt">=</span><span class="number">0.4</span> marker<span class="gtkdoc opt">-</span>tick<span class="gtkdoc opt">-</span>period<span class="gtkdoc opt">=</span><span class="number">10</span> sine<span class="gtkdoc opt">-</span>periods<span class="gtkdoc opt">-</span>per<span class="gtkdoc opt">-</span>tick<span class="gtkdoc opt">=</span><span class="number">20</span> <span class="gtkdoc opt">!</span> autoaudiosink</pre></td> 199 </tr> 200 </tbody> 201 </table> 202</div> 203 204<p> This pipeline produces a series of 10 kHz sine wave ticks. Each tick is 20520 sine wave periods long, ticks occur every 100 ms and have a volume of 2060.4. Every 10th tick is a marker tick and has the default marker tick volume 207of 1.0. The beginning and end of the ticks are modulated with the ramp.</p> 208</div> 209<div class="refsynopsisdiv"> 210<h2>Synopsis</h2> 211<div class="refsect2"> 212<a name="id-1.2.13.7.6.1"></a><h3>Element Information</h3> 213<div class="variablelist"><table border="0" class="variablelist"> 214<colgroup> 215<col align="left" valign="top"> 216<col> 217</colgroup> 218<tbody> 219<tr> 220<td><p><span class="term">plugin</span></p></td> 221<td> 222 <a class="link" href="gst-plugins-base-plugins-plugin-audiotestsrc.html#plugin-audiotestsrc">audiotestsrc</a> 223 </td> 224</tr> 225<tr> 226<td><p><span class="term">author</span></p></td> 227<td>Stefan Kost <ensonic@users.sf.net></td> 228</tr> 229<tr> 230<td><p><span class="term">class</span></p></td> 231<td>Source/Audio</td> 232</tr> 233</tbody> 234</table></div> 235</div> 236<hr> 237<div class="refsect2"> 238<a name="id-1.2.13.7.6.2"></a><h3>Element Pads</h3> 239<div class="variablelist"><table border="0" class="variablelist"> 240<colgroup> 241<col align="left" valign="top"> 242<col> 243</colgroup> 244<tbody> 245<tr> 246<td><p><span class="term">name</span></p></td> 247<td>src</td> 248</tr> 249<tr> 250<td><p><span class="term">direction</span></p></td> 251<td>source</td> 252</tr> 253<tr> 254<td><p><span class="term">presence</span></p></td> 255<td>always</td> 256</tr> 257<tr> 258<td><p><span class="term">details</span></p></td> 259<td>audio/x-raw, format=(string){ S16LE, S16BE, U16LE, U16BE, S24_32LE, S24_32BE, U24_32LE, U24_32BE, S32LE, S32BE, U32LE, U32BE, S24LE, S24BE, U24LE, U24BE, S20LE, S20BE, U20LE, U20BE, S18LE, S18BE, U18LE, U18BE, F32LE, F32BE, F64LE, F64BE, S8, U8 }, layout=(string){ interleaved, non-interleaved }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ]</td> 260</tr> 261</tbody> 262</table></div> 263</div> 264</div> 265</div> 266<div class="refsect1"> 267<a name="gst-plugins-base-plugins-audiotestsrc.functions_details"></a><h2>Functions</h2> 268<p></p> 269</div> 270<div class="refsect1"> 271<a name="gst-plugins-base-plugins-audiotestsrc.other_details"></a><h2>Types and Values</h2> 272<div class="refsect2"> 273<a name="GstAudioTestSrc-struct"></a><h3>struct GstAudioTestSrc</h3> 274<pre class="programlisting">struct GstAudioTestSrc;</pre> 275<p>audiotestsrc object structure.</p> 276</div> 277<hr> 278<div class="refsect2"> 279<a name="GstAudioTestSrcWave"></a><h3>enum GstAudioTestSrcWave</h3> 280<p>Different types of supported sound waves.</p> 281<div class="refsect3"> 282<a name="GstAudioTestSrcWave.members"></a><h4>Members</h4> 283<div class="informaltable"><table class="informaltable" width="100%" border="0"> 284<colgroup> 285<col width="300px" class="enum_members_name"> 286<col class="enum_members_description"> 287<col width="200px" class="enum_members_annotations"> 288</colgroup> 289<tbody> 290<tr> 291<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-SINE:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_SINE</p></td> 292<td class="enum_member_description"> 293<p>a sine wave</p> 294</td> 295<td class="enum_member_annotations"> </td> 296</tr> 297<tr> 298<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-SQUARE:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_SQUARE</p></td> 299<td class="enum_member_description"> 300<p>a square wave</p> 301</td> 302<td class="enum_member_annotations"> </td> 303</tr> 304<tr> 305<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-SAW:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_SAW</p></td> 306<td class="enum_member_description"> 307<p>a saw wave</p> 308</td> 309<td class="enum_member_annotations"> </td> 310</tr> 311<tr> 312<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-TRIANGLE:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_TRIANGLE</p></td> 313<td class="enum_member_description"> 314<p>a tringle wave</p> 315</td> 316<td class="enum_member_annotations"> </td> 317</tr> 318<tr> 319<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-SILENCE:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_SILENCE</p></td> 320<td class="enum_member_description"> 321<p>silence</p> 322</td> 323<td class="enum_member_annotations"> </td> 324</tr> 325<tr> 326<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-WHITE-NOISE:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_WHITE_NOISE</p></td> 327<td class="enum_member_description"> 328<p>white uniform noise</p> 329</td> 330<td class="enum_member_annotations"> </td> 331</tr> 332<tr> 333<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-PINK-NOISE:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_PINK_NOISE</p></td> 334<td class="enum_member_description"> 335<p>pink noise</p> 336</td> 337<td class="enum_member_annotations"> </td> 338</tr> 339<tr> 340<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-SINE-TAB:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_SINE_TAB</p></td> 341<td class="enum_member_description"> 342<p>sine wave using a table</p> 343</td> 344<td class="enum_member_annotations"> </td> 345</tr> 346<tr> 347<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-TICKS:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_TICKS</p></td> 348<td class="enum_member_description"> 349<p>periodic ticks</p> 350</td> 351<td class="enum_member_annotations"> </td> 352</tr> 353<tr> 354<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-GAUSSIAN-WHITE-NOISE:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_GAUSSIAN_WHITE_NOISE</p></td> 355<td class="enum_member_description"> 356<p>white (zero mean) Gaussian noise</p> 357</td> 358<td class="enum_member_annotations"> </td> 359</tr> 360<tr> 361<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-RED-NOISE:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_RED_NOISE</p></td> 362<td class="enum_member_description"> 363<p>red (brownian) noise</p> 364</td> 365<td class="enum_member_annotations"> </td> 366</tr> 367<tr> 368<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-BLUE-NOISE:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_BLUE_NOISE</p></td> 369<td class="enum_member_description"> 370<p>spectraly inverted pink noise</p> 371</td> 372<td class="enum_member_annotations"> </td> 373</tr> 374<tr> 375<td class="enum_member_name"><p><a name="GST-AUDIO-TEST-SRC-WAVE-VIOLET-NOISE:CAPS"></a>GST_AUDIO_TEST_SRC_WAVE_VIOLET_NOISE</p></td> 376<td class="enum_member_description"> 377<p>spectraly inverted red (brownian) noise</p> 378</td> 379<td class="enum_member_annotations"> </td> 380</tr> 381</tbody> 382</table></div> 383</div> 384</div> 385</div> 386<div class="refsect1"> 387<a name="gst-plugins-base-plugins-audiotestsrc.property-details"></a><h2>Property Details</h2> 388<div class="refsect2"> 389<a name="GstAudioTestSrc--can-activate-pull"></a><h3>The <code class="literal">“can-activate-pull”</code> property</h3> 390<pre class="programlisting"> “can-activate-pull” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> 391<p>Can activate in pull mode.</p> 392<p>Flags: Read / Write</p> 393<p>Default value: FALSE</p> 394</div> 395<hr> 396<div class="refsect2"> 397<a name="GstAudioTestSrc--can-activate-push"></a><h3>The <code class="literal">“can-activate-push”</code> property</h3> 398<pre class="programlisting"> “can-activate-push” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> 399<p>Can activate in push mode.</p> 400<p>Flags: Read / Write</p> 401<p>Default value: TRUE</p> 402</div> 403<hr> 404<div class="refsect2"> 405<a name="GstAudioTestSrc--freq"></a><h3>The <code class="literal">“freq”</code> property</h3> 406<pre class="programlisting"> “freq” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></pre> 407<p>Frequency of test signal. The sample rate needs to be at least 4 times higher.</p> 408<p>Flags: Read / Write</p> 409<p>Allowed values: [0,5.36871e+08]</p> 410<p>Default value: 440</p> 411</div> 412<hr> 413<div class="refsect2"> 414<a name="GstAudioTestSrc--is-live"></a><h3>The <code class="literal">“is-live”</code> property</h3> 415<pre class="programlisting"> “is-live” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> 416<p>Whether to act as a live source.</p> 417<p>Flags: Read / Write</p> 418<p>Default value: FALSE</p> 419</div> 420<hr> 421<div class="refsect2"> 422<a name="GstAudioTestSrc--samplesperbuffer"></a><h3>The <code class="literal">“samplesperbuffer”</code> property</h3> 423<pre class="programlisting"> “samplesperbuffer” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a></pre> 424<p>Number of samples in each outgoing buffer.</p> 425<p>Flags: Read / Write</p> 426<p>Allowed values: >= 1</p> 427<p>Default value: 1024</p> 428</div> 429<hr> 430<div class="refsect2"> 431<a name="GstAudioTestSrc--timestamp-offset"></a><h3>The <code class="literal">“timestamp-offset”</code> property</h3> 432<pre class="programlisting"> “timestamp-offset” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a></pre> 433<p>An offset added to timestamps set on buffers (in ns).</p> 434<p>Flags: Read / Write</p> 435<p>Default value: 0</p> 436</div> 437<hr> 438<div class="refsect2"> 439<a name="GstAudioTestSrc--volume"></a><h3>The <code class="literal">“volume”</code> property</h3> 440<pre class="programlisting"> “volume” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></pre> 441<p>Volume of test signal.</p> 442<p>Flags: Read / Write</p> 443<p>Allowed values: [0,1]</p> 444<p>Default value: 0.8</p> 445</div> 446<hr> 447<div class="refsect2"> 448<a name="GstAudioTestSrc--wave"></a><h3>The <code class="literal">“wave”</code> property</h3> 449<pre class="programlisting"> “wave” <a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrcWave" title="enum GstAudioTestSrcWave"><span class="type">GstAudioTestSrcWave</span></a></pre> 450<p>Oscillator waveform.</p> 451<p>Flags: Read / Write</p> 452<p>Default value: Sine</p> 453</div> 454<hr> 455<div class="refsect2"> 456<a name="GstAudioTestSrc--apply-tick-ramp"></a><h3>The <code class="literal">“apply-tick-ramp”</code> property</h3> 457<pre class="programlisting"> “apply-tick-ramp” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> 458<p>Apply ramp to tick samples.</p> 459<p>Flags: Read / Write</p> 460<p>Default value: FALSE</p> 461</div> 462<hr> 463<div class="refsect2"> 464<a name="GstAudioTestSrc--marker-tick-period"></a><h3>The <code class="literal">“marker-tick-period”</code> property</h3> 465<pre class="programlisting"> “marker-tick-period” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> 466<p>Make every Nth tick a marker tick (= a tick with different volume). Only used if wave = ticks. 0 = no marker ticks.</p> 467<p>Flags: Read / Write</p> 468<p>Default value: 0</p> 469</div> 470<hr> 471<div class="refsect2"> 472<a name="GstAudioTestSrc--marker-tick-volume"></a><h3>The <code class="literal">“marker-tick-volume”</code> property</h3> 473<pre class="programlisting"> “marker-tick-volume” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></pre> 474<p>Volume of marker ticks. Only used if wave = ticks andmarker-tick-period is set to a nonzero value.</p> 475<p>Flags: Read / Write</p> 476<p>Allowed values: [0,1]</p> 477<p>Default value: 1</p> 478</div> 479<hr> 480<div class="refsect2"> 481<a name="GstAudioTestSrc--sine-periods-per-tick"></a><h3>The <code class="literal">“sine-periods-per-tick”</code> property</h3> 482<pre class="programlisting"> “sine-periods-per-tick” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> 483<p>Number of sine wave periods in one tick. Only used if wave = ticks.</p> 484<p>Flags: Read / Write</p> 485<p>Allowed values: >= 1</p> 486<p>Default value: 10</p> 487</div> 488<hr> 489<div class="refsect2"> 490<a name="GstAudioTestSrc--tick-interval"></a><h3>The <code class="literal">“tick-interval”</code> property</h3> 491<pre class="programlisting"> “tick-interval” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a></pre> 492<p>Distance between start of current and start of next tick, in nanoseconds.</p> 493<p>Flags: Read / Write</p> 494<p>Allowed values: >= 1</p> 495<p>Default value: 1000000000</p> 496</div> 497</div> 498</div> 499<div class="footer"> 500<hr>Generated by GTK-Doc V1.28</div> 501</body> 502</html>
