This file is indexed.

/usr/share/gtk-doc/html/gst-plugins-base-plugins-1.0/gst-plugins-base-plugins-audiotestsrc.html is in gstreamer1.0-plugins-base-doc 1.2.3-1.

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
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>audiotestsrc</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Plugins Reference Manual">
<link rel="up" href="ch01.html" title="gst-plugins-base Elements">
<link rel="prev" href="gst-plugins-base-plugins-audioresample.html" title="audioresample">
<link rel="next" href="gst-plugins-base-plugins-cdparanoiasrc.html" title="cdparanoiasrc">
<meta name="generator" content="GTK-Doc V1.19 (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-plugins-audioresample.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="ch01.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 1.0 Plugins Reference Manual</th>
<td><a accesskey="n" href="gst-plugins-base-plugins-cdparanoiasrc.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-plugins-audiotestsrc.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#gst-plugins-base-plugins-audiotestsrc.description" class="shortcut">Description</a>
                   | 
                  <a href="#gst-plugins-base-plugins-audiotestsrc.object-hierarchy" class="shortcut">Object Hierarchy</a>
                   | 
                  <a href="#gst-plugins-base-plugins-audiotestsrc.properties" class="shortcut">Properties</a>
</td></tr>
</table>
<div class="refentry">
<a name="gst-plugins-base-plugins-audiotestsrc"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-base-plugins-audiotestsrc.top_of_page"></a>audiotestsrc</span></h2>
<p>audiotestsrc — Creates audio test signals of given frequency and volume</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="gst-plugins-base-plugins-audiotestsrc.synopsis"></a><h2>Synopsis</h2>
<a name="GstAudioTestSrc"></a><pre class="synopsis">struct              <a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc-struct" title="struct GstAudioTestSrc">GstAudioTestSrc</a>;
enum                <a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrcWave" title="enum GstAudioTestSrcWave">GstAudioTestSrcWave</a>;
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-audiotestsrc.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/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
         +----<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html">GstObject</a>
               +----<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html">GstElement</a>
                     +----<a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstBaseSrc.html">GstBaseSrc</a>
                           +----GstAudioTestSrc
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-audiotestsrc.properties"></a><h2>Properties</h2>
<pre class="synopsis">
  "<a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--freq" title='The "freq" property'>freq</a>"                     <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write
  "<a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--is-live" title='The "is-live" property'>is-live</a>"                  <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write
  "<a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--samplesperbuffer" title='The "samplesperbuffer" property'>samplesperbuffer</a>"         <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write
  "<a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--timestamp-offset" title='The "timestamp-offset" property'>timestamp-offset</a>"         <span class="type">gint64</span>                : Read / Write
  "<a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--volume" title='The "volume" property'>volume</a>"                   <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write
  "<a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--wave" title='The "wave" property'>wave</a>"                     <a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrcWave" title="enum GstAudioTestSrcWave"><span class="type">GstAudioTestSrcWave</span></a>   : Read / Write
  "<a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--can-activate-pull" title='The "can-activate-pull" property'>can-activate-pull</a>"        <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write
  "<a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrc--can-activate-push" title='The "can-activate-push" property'>can-activate-push</a>"        <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-audiotestsrc.description"></a><h2>Description</h2>
<p>
AudioTestSrc can be used to generate basic audio signals. It support several
different waveforms and allows to set the base frequency and volume.
</p>
<p>
</p>
<div class="refsect2">
<a name="id-1.2.10.6.3.1"></a><h3>Example launch line</h3>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch audiotestsrc <span class="gtkdoc opt">!</span> audioconvert <span class="gtkdoc opt">!</span> alsasink</pre></td>
      </tr>
    </tbody>
  </table>
</div>
 This pipeline produces a sine with default frequency, 440 Hz, and the
default volume, 0.8 (relative to a maximum 1.0).
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch 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> audioconvert <span class="gtkdoc opt">!</span> tee name<span class="gtkdoc opt">=</span>t <span class="gtkdoc opt">!</span> queue <span class="gtkdoc opt">!</span> alsasink t<span class="gtkdoc opt">. !</span> queue <span class="gtkdoc opt">!</span> libvisual_lv_scope <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> xvimagesink</pre></td>
      </tr>
    </tbody>
  </table>
</div>
 In this example a saw wave is generated. The wave is shown using a
scope visualizer from libvisual, allowing you to visually verify that
the saw wave is correct.
</div>
<p>
</p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="id-1.2.10.6.4.1"></a><h3>Element Information</h3>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">plugin</span></p></td>
<td>
            <a class="link" href="gst-plugins-base-plugins-plugin-audiotestsrc.html#plugin-audiotestsrc">audiotestsrc</a>
          </td>
</tr>
<tr>
<td><p><span class="term">author</span></p></td>
<td>Stefan Kost &lt;ensonic@users.sf.net&gt;</td>
</tr>
<tr>
<td><p><span class="term">class</span></p></td>
<td>Source/Audio</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.10.6.4.2"></a><h3>Element Pads</h3>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">name</span></p></td>
<td>src</td>
</tr>
<tr>
<td><p><span class="term">direction</span></p></td>
<td>source</td>
</tr>
<tr>
<td><p><span class="term">presence</span></p></td>
<td>always</td>
</tr>
<tr>
<td><p><span class="term">details</span></p></td>
<td>audio/x-raw, format=(string){ S16LE, S32LE, F32LE, F64LE }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2 ]</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-audiotestsrc.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstAudioTestSrc-struct"></a><h3>struct GstAudioTestSrc</h3>
<pre class="programlisting">struct GstAudioTestSrc;</pre>
<p>
audiotestsrc object structure.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioTestSrcWave"></a><h3>enum GstAudioTestSrcWave</h3>
<pre class="programlisting">typedef enum {
  GST_AUDIO_TEST_SRC_WAVE_SINE,
  GST_AUDIO_TEST_SRC_WAVE_SQUARE,
  GST_AUDIO_TEST_SRC_WAVE_SAW,
  GST_AUDIO_TEST_SRC_WAVE_TRIANGLE,
  GST_AUDIO_TEST_SRC_WAVE_SILENCE,
  GST_AUDIO_TEST_SRC_WAVE_WHITE_NOISE,
  GST_AUDIO_TEST_SRC_WAVE_PINK_NOISE,
  GST_AUDIO_TEST_SRC_WAVE_SINE_TAB,
  GST_AUDIO_TEST_SRC_WAVE_TICKS,
  GST_AUDIO_TEST_SRC_WAVE_GAUSSIAN_WHITE_NOISE,
  GST_AUDIO_TEST_SRC_WAVE_RED_NOISE,
  GST_AUDIO_TEST_SRC_WAVE_BLUE_NOISE,
  GST_AUDIO_TEST_SRC_WAVE_VIOLET_NOISE
} GstAudioTestSrcWave;
</pre>
<p>
Different types of supported sound waves.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-SINE:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_SINE</code></span></p></td>
<td>a sine wave
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-SQUARE:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_SQUARE</code></span></p></td>
<td>a square wave
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-SAW:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_SAW</code></span></p></td>
<td>a saw wave
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-TRIANGLE:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_TRIANGLE</code></span></p></td>
<td>a tringle wave
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-SILENCE:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_SILENCE</code></span></p></td>
<td>silence
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-WHITE-NOISE:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_WHITE_NOISE</code></span></p></td>
<td>white uniform noise
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-PINK-NOISE:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_PINK_NOISE</code></span></p></td>
<td>pink noise
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-SINE-TAB:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_SINE_TAB</code></span></p></td>
<td>sine wave using a table
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-TICKS:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_TICKS</code></span></p></td>
<td>periodic ticks
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-GAUSSIAN-WHITE-NOISE:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_GAUSSIAN_WHITE_NOISE</code></span></p></td>
<td>white (zero mean) Gaussian noise;  volume sets the standard deviation of the noise in units of the range of values of the sample type, e.g. volume=0.1 produces noise with a standard deviation of 0.1*32767=3277 with 16-bit integer samples, or 0.1*1.0=0.1 with floating-point samples.
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-RED-NOISE:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_RED_NOISE</code></span></p></td>
<td>red (brownian) noise
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-BLUE-NOISE:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_BLUE_NOISE</code></span></p></td>
<td>spectraly inverted pink noise
</td>
</tr>
<tr>
<td><p><a name="GST-AUDIO-TEST-SRC-WAVE-VIOLET-NOISE:CAPS"></a><span class="term"><code class="literal">GST_AUDIO_TEST_SRC_WAVE_VIOLET_NOISE</code></span></p></td>
<td>spectraly inverted red (brownian) noise
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-audiotestsrc.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstAudioTestSrc--freq"></a><h3>The <code class="literal">"freq"</code> property</h3>
<pre class="programlisting">  "freq"                     <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write</pre>
<p>Frequency of test signal.</p>
<p>Allowed values: [0,20000]</p>
<p>Default value: 440</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioTestSrc--is-live"></a><h3>The <code class="literal">"is-live"</code> property</h3>
<pre class="programlisting">  "is-live"                  <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write</pre>
<p>Whether to act as a live source.</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioTestSrc--samplesperbuffer"></a><h3>The <code class="literal">"samplesperbuffer"</code> property</h3>
<pre class="programlisting">  "samplesperbuffer"         <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write</pre>
<p>Number of samples in each outgoing buffer.</p>
<p>Allowed values: &gt;= 1</p>
<p>Default value: 1024</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioTestSrc--timestamp-offset"></a><h3>The <code class="literal">"timestamp-offset"</code> property</h3>
<pre class="programlisting">  "timestamp-offset"         <span class="type">gint64</span>                : Read / Write</pre>
<p>An offset added to timestamps set on buffers (in ns).</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioTestSrc--volume"></a><h3>The <code class="literal">"volume"</code> property</h3>
<pre class="programlisting">  "volume"                   <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write</pre>
<p>Volume of test signal.</p>
<p>Allowed values: [0,1]</p>
<p>Default value: 0.8</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioTestSrc--wave"></a><h3>The <code class="literal">"wave"</code> property</h3>
<pre class="programlisting">  "wave"                     <a class="link" href="gst-plugins-base-plugins-audiotestsrc.html#GstAudioTestSrcWave" title="enum GstAudioTestSrcWave"><span class="type">GstAudioTestSrcWave</span></a>   : Read / Write</pre>
<p>Oscillator waveform.</p>
<p>Default value: Sine</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioTestSrc--can-activate-pull"></a><h3>The <code class="literal">"can-activate-pull"</code> property</h3>
<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>              : Read / Write</pre>
<p>Can activate in pull mode.</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GstAudioTestSrc--can-activate-push"></a><h3>The <code class="literal">"can-activate-push"</code> property</h3>
<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>              : Read / Write</pre>
<p>Can activate in push mode.</p>
<p>Default value: TRUE</p>
</div>
</div>
</div>
<div class="footer">
<hr>
          Generated by GTK-Doc V1.19</div>
</body>
</html>