docs/plugins/html/gst-plugins-good-plugins-monoscope.html

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  20 <th width="100%" align="center">GStreamer Good Plugins 0.10 Plugins Reference Manual</th>
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  24 <a href="#gst-plugins-good-plugins-monoscope.synopsis" class="shortcut">Top</a>
  25                    |
  26                   <a href="#gst-plugins-good-plugins-monoscope.description" class="shortcut">Description</a>
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  30 <a name="gst-plugins-good-plugins-monoscope"></a><div class="titlepage"></div>
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  32 <td valign="top">
  33 <h2><span class="refentrytitle"><a name="gst-plugins-good-plugins-monoscope.top_of_page"></a>monoscope</span></h2>
  34 <p>monoscope — Displays a highly stabilised waveform of audio input</p>
  35 </td>
  36 <td valign="top" align="right"></td>
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  38 <div class="refsynopsisdiv">
  39 <a name="gst-plugins-good-plugins-monoscope.synopsis"></a><h2>Synopsis</h2>
  40 <pre class="synopsis">struct              <a class="link" href="gst-plugins-good-plugins-monoscope.html#GstMonoscope" title="struct GstMonoscope">GstMonoscope</a>;
  41 </pre>
  42 </div>
  43 <div class="refsect1">
  44 <a name="gst-plugins-good-plugins-monoscope.description"></a><h2>Description</h2>
  45 <p>
  46 Monoscope is an audio visualisation element. It creates a coloured
  47 curve of the audio signal like on an oscilloscope.
  48 </p>
  49 <p>
  50 </p>
  51 <div class="refsect2">
  52 <a name="idp12018016"></a><h3>Example launch line</h3>
  53 <div class="informalexample">
  54   <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
  55     <tbody>
  56       <tr>
  57         <td class="listing_lines" align="right"><pre>1</pre></td>
  58         <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch <span class="gtkdoc opt">-</span>v audiotestsrc <span class="gtkdoc opt">!</span> audioconvert <span class="gtkdoc opt">!</span> monoscope <span class="gtkdoc opt">!</span> ffmpegcolorspace <span class="gtkdoc opt">!</span> ximagesink</pre></td>
  59       </tr>
  60     </tbody>
  61   </table>
  62 </div>
  63
  64 </div>
  65 <p>
  66 </p>
  67 <div class="refsynopsisdiv">
  68 <h2>Synopsis</h2>
  69 <div class="refsect2">
  70 <a name="idp9475504"></a><h3>Element Information</h3>
  71 <div class="variablelist"><table border="0">
  72 <col align="left" valign="top">
  73 <tbody>
  74 <tr>
  75 <td><p><span class="term">plugin</span></p></td>
  76 <td>
  77             <a class="link" href="gst-plugins-good-plugins-plugin-monoscope.html#plugin-monoscope">monoscope</a>
  78           </td>
  79 </tr>
  80 <tr>
  81 <td><p><span class="term">author</span></p></td>
  82 <td>Richard Boulton &lt;richard@tartarus.org&gt;</td>
  83 </tr>
  84 <tr>
  85 <td><p><span class="term">class</span></p></td>
  86 <td>Visualization</td>
  87 </tr>
  88 </tbody>
  89 </table></div>
  90 </div>
  91 <hr>
  92 <div class="refsect2">
  93 <a name="idp13911056"></a><h3>Element Pads</h3>
  94 <div class="variablelist"><table border="0">
  95 <col align="left" valign="top">
  96 <tbody>
  97 <tr>
  98 <td><p><span class="term">name</span></p></td>
  99 <td>sink</td>
 100 </tr>
 101 <tr>
 102 <td><p><span class="term">direction</span></p></td>
 103 <td>sink</td>
 104 </tr>
 105 <tr>
 106 <td><p><span class="term">presence</span></p></td>
 107 <td>always</td>
 108 </tr>
 109 <tr>
 110 <td><p><span class="term">details</span></p></td>
 111 <td>audio/x-raw-int, rate=(int)[ 1, 2147483647 ], channels=(int)2, endianness=(int)1234, width=(int)16, depth=(int)16, signed=(boolean)true</td>
 112 </tr>
 113 </tbody>
 114 </table></div>
 115 <div class="variablelist"><table border="0">
 116 <col align="left" valign="top">
 117 <tbody>
 118 <tr>
 119 <td><p><span class="term">name</span></p></td>
 120 <td>src</td>
 121 </tr>
 122 <tr>
 123 <td><p><span class="term">direction</span></p></td>
 124 <td>source</td>
 125 </tr>
 126 <tr>
 127 <td><p><span class="term">presence</span></p></td>
 128 <td>always</td>
 129 </tr>
 130 <tr>
 131 <td><p><span class="term">details</span></p></td>
 132 <td>video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)65280, green_mask=(int)16711680, blue_mask=(int)-16777216, width=(int)256, height=(int)128, framerate=(fraction)[ 0/1, 2147483647/1 ]</td>
 133 </tr>
 134 </tbody>
 135 </table></div>
 136 </div>
 137 </div>
 138 <p>
 139 </p>
 140 </div>
 141 <div class="refsect1">
 142 <a name="gst-plugins-good-plugins-monoscope.details"></a><h2>Details</h2>
 143 <div class="refsect2">
 144 <a name="GstMonoscope"></a><h3>struct GstMonoscope</h3>
 145 <pre class="programlisting">struct GstMonoscope {
 146   GstElement element;
 147
 148   /* pads */
 149   GstPad      *sinkpad;
 150   GstPad      *srcpad;
 151
 152   GstAdapter  *adapter;
 153
 154   guint64      next_ts;             /* expected timestamp of the next frame */
 155   guint64      frame_duration;      /* video frame duration    */
 156   gint         rate;                /* sample rate             */
 157   guint        bps;                 /* bytes per sample        */
 158   guint        spf;                 /* samples per video frame */
 159
 160   GstSegment   segment;
 161
 162   /* QoS stuff *//* with LOCK */
 163   gdouble      proportion;
 164   GstClockTime earliest_time;
 165
 166   /* video state */
 167   gint         fps_num;
 168   gint         fps_denom;
 169   gint         width;
 170   gint         height;
 171   guint        outsize;
 172
 173   /* visualisation state */
 174   struct monoscope_state *visstate;
 175 };
 176 </pre>
 177 <p>
 178 </p>
 179 </div>
 180 </div>
 181 <div class="refsect1">
 182 <a name="gst-plugins-good-plugins-monoscope.see-also"></a><h2>See Also</h2>
 183 goom
 184 </div>
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