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<div class="title">basics/element_factory.cc</div> </div>
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<p>A gstreamermm <a class="el" href="classGst_1_1ElementFactory.html" title="Create Gst::Element 's from a factory. ">Gst::ElementFactory</a> example.</p>
<div class="fragment"><div class="line"><span class="comment">/*</span></div><div class="line"><span class="comment"> * This example presents how to use Gst::ElementFactory class, getting</span></div><div class="line"><span class="comment"> * information and create specific element.</span></div><div class="line"><span class="comment"> */</span></div><div class="line"><span class="preprocessor">#include <gstreamermm.h></span></div><div class="line"></div><div class="line"><span class="preprocessor">#include <<a class="codeRef" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01265.html">iostream</a>></span></div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[])</div><div class="line">{</div><div class="line"> <a name="a0"></a><a class="code" href="namespaceGst.html#a4368f0336db20f7dae336c97ebce0ef1">Gst::init</a>(argc, argv);</div><div class="line"></div><div class="line"> <span class="comment">// Get list of all primary demuxers in the system</span></div><div class="line"> <a name="a1"></a>std::cout << <span class="stringliteral">"List of primary demuxers: "</span> << <a name="a2"></a><a class="codeRef" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01616.html#a8b3758bb8f17c440c7963363f42f69f3">std::endl</a>;</div><div class="line"> <span class="keywordflow">for</span> (Glib::RefPtr<Gst::ElementFactory> factory</div><div class="line"> : <a name="a3"></a><a class="code" href="classGst_1_1ElementFactory.html#adec5791a3043c0647a85ceb032acac03">Gst::ElementFactory::get_elements</a>(<a name="a4"></a><a class="code" href="namespaceGst.html#aa34ccc863557d4b66fd819da4413b1c0ac664713d1563d162ad884d3b2fa23fa8">Gst::ELEMENT_FACTORY_TYPE_DEMUXER</a>, <a name="a5"></a><a class="code" href="namespaceGst.html#gaf75e7dc2cfeb47b94f218c7a032c5a95a3e97c553312904df2f3d6c80309e42b1">Gst::RANK_PRIMARY</a>))</div><div class="line"> {</div><div class="line"> std::cout << <span class="stringliteral">" * "</span> << factory->get_name() << <a class="codeRef" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01616.html#a8b3758bb8f17c440c7963363f42f69f3">std::endl</a>;</div><div class="line"> }</div><div class="line"> std::cout << <a class="codeRef" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01616.html#a8b3758bb8f17c440c7963363f42f69f3">std::endl</a>;</div><div class="line"></div><div class="line"> Glib::RefPtr<Gst::ElementFactory> fakesrc_factory = <a name="a6"></a><a class="code" href="classGst_1_1ElementFactory.html#a1d496258aabd0bb3408749ec9b1841f8">Gst::ElementFactory::find</a>(<span class="stringliteral">"fakesrc"</span>);</div><div class="line"> <span class="keywordflow">if</span> (!fakesrc_factory)</div><div class="line"> {</div><div class="line"> <a name="a7"></a>std::cerr << <span class="stringliteral">"Failed to find factory of type 'fakesrc'"</span> << <a class="codeRef" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01616.html#a8b3758bb8f17c440c7963363f42f69f3">std::endl</a>;</div><div class="line"> <span class="keywordflow">return</span> -1;</div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="comment">// Read information about an author of the element</span></div><div class="line"> std::cout << <span class="stringliteral">"Author of the element '"</span> << fakesrc_factory->get_name() << <span class="stringliteral">"' is "</span></div><div class="line"> << fakesrc_factory->get_metadata(GST_ELEMENT_METADATA_AUTHOR) << std::endl << <a class="codeRef" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01616.html#a8b3758bb8f17c440c7963363f42f69f3">std::endl</a>;</div><div class="line"></div><div class="line"> <span class="comment">// Read all available information about the element</span></div><div class="line"> std::cout << <span class="stringliteral">"All information about element '"</span> << fakesrc_factory->get_name() << <span class="stringliteral">"':"</span> << <a class="codeRef" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01616.html#a8b3758bb8f17c440c7963363f42f69f3">std::endl</a>;</div><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">auto</span> metadata_key : fakesrc_factory->get_metadata_keys())</div><div class="line"> {</div><div class="line"> std::cout << <span class="stringliteral">" * "</span> << metadata_key << <span class="stringliteral">": "</span> << fakesrc_factory->get_metadata(metadata_key) << <a class="codeRef" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01616.html#a8b3758bb8f17c440c7963363f42f69f3">std::endl</a>;</div><div class="line"> }</div><div class="line"></div><div class="line"></div><div class="line"> <span class="comment">// Create element fakesrc</span></div><div class="line"></div><div class="line"> <span class="comment">// Method 1</span></div><div class="line"> {</div><div class="line"> Glib::RefPtr<Gst::Element> fakesrc = fakesrc_factory->create(<span class="stringliteral">"source"</span>);</div><div class="line"></div><div class="line"> <span class="keywordflow">if</span> (!fakesrc)</div><div class="line"> {</div><div class="line"> std::cerr << <span class="stringliteral">"Failed to create element of type 'fakesrc'"</span> << <a class="codeRef" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01616.html#a8b3758bb8f17c440c7963363f42f69f3">std::endl</a>;</div><div class="line"> <span class="keywordflow">return</span> -1;</div><div class="line"> }</div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="comment">// Method 2</span></div><div class="line"> {</div><div class="line"> Glib::RefPtr<Gst::Element> fakesrc = <a name="a8"></a><a class="code" href="classGst_1_1ElementFactory.html#a6a85a2a3c4f69383cad2686d381e10e9">Gst::ElementFactory::create_element</a>(<span class="stringliteral">"fakesrc"</span>, <span class="stringliteral">"source"</span>);</div><div class="line"> <span class="keywordflow">if</span> (!fakesrc)</div><div class="line"> {</div><div class="line"> std::cerr << <span class="stringliteral">"Failed to create element of type 'fakesrc'"</span> << <a class="codeRef" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01616.html#a8b3758bb8f17c440c7963363f42f69f3">std::endl</a>;</div><div class="line"> <span class="keywordflow">return</span> -1;</div><div class="line"> }</div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="keywordflow">return</span> 0;</div><div class="line">}</div></div><!-- fragment --> </div><!-- contents -->
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