wearable/docs/plugins/html/gst-plugins-base-plugins-appsrc.html

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  20 <th width="100%" align="center">GStreamer Base Plugins 0.10 Plugins Reference Manual</th>
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  24 <a href="#gst-plugins-base-plugins-appsrc.synopsis" class="shortcut">Top</a>
  25                    |
  26                   <a href="#gst-plugins-base-plugins-appsrc.description" class="shortcut">Description</a>
  27                    |
  28                   <a href="#gst-plugins-base-plugins-appsrc.object-hierarchy" class="shortcut">Object Hierarchy</a>
  29                    |
  30                   <a href="#gst-plugins-base-plugins-appsrc.implemented-interfaces" class="shortcut">Implemented Interfaces</a>
  31                    |
  32                   <a href="#gst-plugins-base-plugins-appsrc.properties" class="shortcut">Properties</a>
  33                    |
  34                   <a href="#gst-plugins-base-plugins-appsrc.signals" class="shortcut">Signals</a>
  35 </td></tr>
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  37 <div class="refentry">
  38 <a name="gst-plugins-base-plugins-appsrc"></a><div class="titlepage"></div>
  39 <div class="refnamediv"><table width="100%"><tr>
  40 <td valign="top">
  41 <h2><span class="refentrytitle"><a name="gst-plugins-base-plugins-appsrc.top_of_page"></a>appsrc</span></h2>
  42 <p>appsrc — Allow the application to feed buffers to a pipeline</p>
  43 </td>
  44 <td valign="top" align="right"></td>
  45 </tr></table></div>
  46 <div class="refsynopsisdiv">
  47 <a name="gst-plugins-base-plugins-appsrc.synopsis"></a><h2>Synopsis</h2>
  48 <a name="GstAppSrc"></a><pre class="synopsis">struct              <a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc-struct" title="struct GstAppSrc">GstAppSrc</a>;
  49 </pre>
  50 </div>
  51 <div class="refsect1">
  52 <a name="gst-plugins-base-plugins-appsrc.object-hierarchy"></a><h2>Object Hierarchy</h2>
  53 <pre class="synopsis">
  54   <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a>
  55    +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstObject.html">GstObject</a>
  56          +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html">GstElement</a>
  57                +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstBaseSrc.html">GstBaseSrc</a>
  58                      +----GstAppSrc
  59 </pre>
  60 </div>
  61 <div class="refsect1">
  62 <a name="gst-plugins-base-plugins-appsrc.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
  63 <p>
  64 GstAppSrc implements
  65  <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstUriHandler.html#GstURIHandler">GstURIHandler</a>.</p>
  66 </div>
  67 <div class="refsect1">
  68 <a name="gst-plugins-base-plugins-appsrc.properties"></a><h2>Properties</h2>
  69 <pre class="synopsis">
  70   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc--block" title='The "block" property'>block</a>"                    <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write
  71   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc--caps" title='The "caps" property'>caps</a>"                     <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a>*              : Read / Write
  72   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc--format" title='The "format" property'>format</a>"                   <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstFormat.html#GstFormat"><span class="type">GstFormat</span></a>             : Read / Write
  73   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc--is-live" title='The "is-live" property'>is-live</a>"                  <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write
  74   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc--max-bytes" title='The "max-bytes" property'>max-bytes</a>"                <span class="type">guint64</span>               : Read / Write
  75   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc--max-latency" title='The "max-latency" property'>max-latency</a>"              <span class="type">gint64</span>                : Read / Write
  76   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc--min-latency" title='The "min-latency" property'>min-latency</a>"              <span class="type">gint64</span>                : Read / Write
  77   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc--size" title='The "size" property'>size</a>"                     <span class="type">gint64</span>                : Read / Write
  78   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc--stream-type" title='The "stream-type" property'>stream-type</a>"              <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-appsrc.html#GstAppStreamType"><span class="type">GstAppStreamType</span></a>      : Read / Write
  79   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc--emit-signals" title='The "emit-signals" property'>emit-signals</a>"             <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write
  80   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc--min-percent" title='The "min-percent" property'>min-percent</a>"              <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a>                 : Read / Write
  81 </pre>
  82 </div>
  83 <div class="refsect1">
  84 <a name="gst-plugins-base-plugins-appsrc.signals"></a><h2>Signals</h2>
  85 <pre class="synopsis">
  86   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc-end-of-stream" title='The "end-of-stream" signal'>end-of-stream</a>"                                  : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-ACTION:CAPS"><code class="literal">Action</code></a>
  87   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc-enough-data" title='The "enough-data" signal'>enough-data</a>"                                    : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a>
  88   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc-need-data" title='The "need-data" signal'>need-data</a>"                                      : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a>
  89   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc-push-buffer" title='The "push-buffer" signal'>push-buffer</a>"                                    : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-ACTION:CAPS"><code class="literal">Action</code></a>
  90   "<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc-seek-data" title='The "seek-data" signal'>seek-data</a>"                                      : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a>
  91 </pre>
  92 </div>
  93 <div class="refsect1">
  94 <a name="gst-plugins-base-plugins-appsrc.description"></a><h2>Description</h2>
  95 <p>
  96 The appsrc element can be used by applications to insert data into a
  97 GStreamer pipeline. Unlike most GStreamer elements, Appsrc provides
  98 external API functions.
  99 </p>
 100 <p>
 101 For the documentation of the API, please see the
 102 <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-appsrc.html">libgstapp</a> section in the
 103 GStreamer Plugins Base Libraries documentation.
 104 </p>
 105 <div class="refsynopsisdiv">
 106 <h2>Synopsis</h2>
 107 <div class="refsect2">
 108 <a name="idp8801728"></a><h3>Element Information</h3>
 109 <div class="variablelist"><table border="0">
 110 <col align="left" valign="top">
 111 <tbody>
 112 <tr>
 113 <td><p><span class="term">plugin</span></p></td>
 114 <td>
 115             <a class="link" href="gst-plugins-base-plugins-plugin-app.html#plugin-app">app</a>
 116           </td>
 117 </tr>
 118 <tr>
 119 <td><p><span class="term">author</span></p></td>
 120 <td>David Schleef &lt;ds@schleef.org&gt;, Wim Taymans &lt;wim.taymans@gmail.com&gt;</td>
 121 </tr>
 122 <tr>
 123 <td><p><span class="term">class</span></p></td>
 124 <td>Generic/Source</td>
 125 </tr>
 126 </tbody>
 127 </table></div>
 128 </div>
 129 <hr>
 130 <div class="refsect2">
 131 <a name="idp8809136"></a><h3>Element Pads</h3>
 132 <div class="variablelist"><table border="0">
 133 <col align="left" valign="top">
 134 <tbody>
 135 <tr>
 136 <td><p><span class="term">name</span></p></td>
 137 <td>src</td>
 138 </tr>
 139 <tr>
 140 <td><p><span class="term">direction</span></p></td>
 141 <td>source</td>
 142 </tr>
 143 <tr>
 144 <td><p><span class="term">presence</span></p></td>
 145 <td>always</td>
 146 </tr>
 147 <tr>
 148 <td><p><span class="term">details</span></p></td>
 149 <td>ANY</td>
 150 </tr>
 151 </tbody>
 152 </table></div>
 153 </div>
 154 </div>
 155 <p>
 156 </p>
 157 </div>
 158 <div class="refsect1">
 159 <a name="gst-plugins-base-plugins-appsrc.details"></a><h2>Details</h2>
 160 <div class="refsect2">
 161 <a name="GstAppSrc-struct"></a><h3>struct GstAppSrc</h3>
 162 <pre class="programlisting">struct GstAppSrc;</pre>
 163 <p>
 164 </p>
 165 </div>
 166 </div>
 167 <div class="refsect1">
 168 <a name="gst-plugins-base-plugins-appsrc.property-details"></a><h2>Property Details</h2>
 169 <div class="refsect2">
 170 <a name="GstAppSrc--block"></a><h3>The <code class="literal">"block"</code> property</h3>
 171 <pre class="programlisting">  "block"                    <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write</pre>
 172 <p>Block push-buffer when max-bytes are queued.</p>
 173 <p>Default value: FALSE</p>
 174 </div>
 175 <hr>
 176 <div class="refsect2">
 177 <a name="GstAppSrc--caps"></a><h3>The <code class="literal">"caps"</code> property</h3>
 178 <pre class="programlisting">  "caps"                     <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a>*              : Read / Write</pre>
 179 <p>The allowed caps for the src pad.</p>
 180 </div>
 181 <hr>
 182 <div class="refsect2">
 183 <a name="GstAppSrc--format"></a><h3>The <code class="literal">"format"</code> property</h3>
 184 <pre class="programlisting">  "format"                   <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstFormat.html#GstFormat"><span class="type">GstFormat</span></a>             : Read / Write</pre>
 185 <p>The format of the segment events and seek.</p>
 186 <p>Default value: GST_FORMAT_BYTES</p>
 187 </div>
 188 <hr>
 189 <div class="refsect2">
 190 <a name="GstAppSrc--is-live"></a><h3>The <code class="literal">"is-live"</code> property</h3>
 191 <pre class="programlisting">  "is-live"                  <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write</pre>
 192 <p>Whether to act as a live source.</p>
 193 <p>Default value: FALSE</p>
 194 </div>
 195 <hr>
 196 <div class="refsect2">
 197 <a name="GstAppSrc--max-bytes"></a><h3>The <code class="literal">"max-bytes"</code> property</h3>
 198 <pre class="programlisting">  "max-bytes"                <span class="type">guint64</span>               : Read / Write</pre>
 199 <p>The maximum number of bytes to queue internally (0 = unlimited).</p>
 200 <p>Default value: 200000</p>
 201 </div>
 202 <hr>
 203 <div class="refsect2">
 204 <a name="GstAppSrc--max-latency"></a><h3>The <code class="literal">"max-latency"</code> property</h3>
 205 <pre class="programlisting">  "max-latency"              <span class="type">gint64</span>                : Read / Write</pre>
 206 <p>The maximum latency (-1 = unlimited).</p>
 207 <p>Allowed values: &gt;= G_MAXULONG</p>
 208 <p>Default value: -1</p>
 209 </div>
 210 <hr>
 211 <div class="refsect2">
 212 <a name="GstAppSrc--min-latency"></a><h3>The <code class="literal">"min-latency"</code> property</h3>
 213 <pre class="programlisting">  "min-latency"              <span class="type">gint64</span>                : Read / Write</pre>
 214 <p>The minimum latency (-1 = default).</p>
 215 <p>Allowed values: &gt;= G_MAXULONG</p>
 216 <p>Default value: -1</p>
 217 </div>
 218 <hr>
 219 <div class="refsect2">
 220 <a name="GstAppSrc--size"></a><h3>The <code class="literal">"size"</code> property</h3>
 221 <pre class="programlisting">  "size"                     <span class="type">gint64</span>                : Read / Write</pre>
 222 <p>The size of the data stream in bytes (-1 if unknown).</p>
 223 <p>Allowed values: &gt;= G_MAXULONG</p>
 224 <p>Default value: -1</p>
 225 </div>
 226 <hr>
 227 <div class="refsect2">
 228 <a name="GstAppSrc--stream-type"></a><h3>The <code class="literal">"stream-type"</code> property</h3>
 229 <pre class="programlisting">  "stream-type"              <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-appsrc.html#GstAppStreamType"><span class="type">GstAppStreamType</span></a>      : Read / Write</pre>
 230 <p>the type of the stream.</p>
 231 <p>Default value: GST_APP_STREAM_TYPE_STREAM</p>
 232 </div>
 233 <hr>
 234 <div class="refsect2">
 235 <a name="GstAppSrc--emit-signals"></a><h3>The <code class="literal">"emit-signals"</code> property</h3>
 236 <pre class="programlisting">  "emit-signals"             <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write</pre>
 237 <p>Emit need-data, enough-data and seek-data signals.</p>
 238 <p>Default value: TRUE</p>
 239 </div>
 240 <hr>
 241 <div class="refsect2">
 242 <a name="GstAppSrc--min-percent"></a><h3>The <code class="literal">"min-percent"</code> property</h3>
 243 <pre class="programlisting">  "min-percent"              <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a>                 : Read / Write</pre>
 244 <p>Emit need-data when queued bytes drops below this percent of max-bytes.</p>
 245 <p>Allowed values: &lt;= 100</p>
 246 <p>Default value: 0</p>
 247 </div>
 248 </div>
 249 <div class="refsect1">
 250 <a name="gst-plugins-base-plugins-appsrc.signal-details"></a><h2>Signal Details</h2>
 251 <div class="refsect2">
 252 <a name="GstAppSrc-end-of-stream"></a><h3>The <code class="literal">"end-of-stream"</code> signal</h3>
 253 <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>       user_function                      (<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc"><span class="type">GstAppSrc</span></a> *gstappsrc,
 254                                                         <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>   user_data)      : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-ACTION:CAPS"><code class="literal">Action</code></a></pre>
 255 <p>
 256 </p>
 257 <div class="variablelist"><table border="0">
 258 <col align="left" valign="top">
 259 <tbody>
 260 <tr>
 261 <td><p><span class="term"><em class="parameter"><code>gstappsrc</code></em> :</span></p></td>
 262 <td>the object which received the signal.</td>
 263 </tr>
 264 <tr>
 265 <td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
 266 <td>user data set when the signal handler was connected.</td>
 267 </tr>
 268 </tbody>
 269 </table></div>
 270 </div>
 271 <hr>
 272 <div class="refsect2">
 273 <a name="GstAppSrc-enough-data"></a><h3>The <code class="literal">"enough-data"</code> signal</h3>
 274 <pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc"><span class="type">GstAppSrc</span></a> *gstappsrc,
 275                                                         <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>   user_data)      : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a></pre>
 276 <p>
 277 </p>
 278 <div class="variablelist"><table border="0">
 279 <col align="left" valign="top">
 280 <tbody>
 281 <tr>
 282 <td><p><span class="term"><em class="parameter"><code>gstappsrc</code></em> :</span></p></td>
 283 <td>the object which received the signal.</td>
 284 </tr>
 285 <tr>
 286 <td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
 287 <td>user data set when the signal handler was connected.</td>
 288 </tr>
 289 </tbody>
 290 </table></div>
 291 </div>
 292 <hr>
 293 <div class="refsect2">
 294 <a name="GstAppSrc-need-data"></a><h3>The <code class="literal">"need-data"</code> signal</h3>
 295 <pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc"><span class="type">GstAppSrc</span></a> *gstappsrc,
 296                                                         <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a>      arg1,
 297                                                         <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>   user_data)      : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a></pre>
 298 <p>
 299 </p>
 300 <div class="variablelist"><table border="0">
 301 <col align="left" valign="top">
 302 <tbody>
 303 <tr>
 304 <td><p><span class="term"><em class="parameter"><code>gstappsrc</code></em> :</span></p></td>
 305 <td>the object which received the signal.</td>
 306 </tr>
 307 <tr>
 308 <td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
 309 <td>user data set when the signal handler was connected.</td>
 310 </tr>
 311 </tbody>
 312 </table></div>
 313 </div>
 314 <hr>
 315 <div class="refsect2">
 316 <a name="GstAppSrc-push-buffer"></a><h3>The <code class="literal">"push-buffer"</code> signal</h3>
 317 <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>       user_function                      (<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc"><span class="type">GstAppSrc</span></a> *gstappsrc,
 318                                                         <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *arg1,
 319                                                         <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>   user_data)      : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-ACTION:CAPS"><code class="literal">Action</code></a></pre>
 320 <p>
 321 </p>
 322 <div class="variablelist"><table border="0">
 323 <col align="left" valign="top">
 324 <tbody>
 325 <tr>
 326 <td><p><span class="term"><em class="parameter"><code>gstappsrc</code></em> :</span></p></td>
 327 <td>the object which received the signal.</td>
 328 </tr>
 329 <tr>
 330 <td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
 331 <td>user data set when the signal handler was connected.</td>
 332 </tr>
 333 </tbody>
 334 </table></div>
 335 </div>
 336 <hr>
 337 <div class="refsect2">
 338 <a name="GstAppSrc-seek-data"></a><h3>The <code class="literal">"seek-data"</code> signal</h3>
 339 <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            user_function                      (<a class="link" href="gst-plugins-base-plugins-appsrc.html#GstAppSrc"><span class="type">GstAppSrc</span></a> *gstappsrc,
 340                                                         <span class="type">guint64</span>    arg1,
 341                                                         <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>   user_data)      : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a></pre>
 342 <p>
 343 </p>
 344 <div class="variablelist"><table border="0">
 345 <col align="left" valign="top">
 346 <tbody>
 347 <tr>
 348 <td><p><span class="term"><em class="parameter"><code>gstappsrc</code></em> :</span></p></td>
 349 <td>the object which received the signal.</td>
 350 </tr>
 351 <tr>
 352 <td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
 353 <td>user data set when the signal handler was connected.</td>
 354 </tr>
 355 </tbody>
 356 </table></div>
 357 </div>
 358 </div>
 359 </div>
 360 <div class="footer">
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