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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>libfluidsynth: Creating a real-time MIDI driver</title>
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<div id="projectname">libfluidsynth
 <span id="projectnumber">2.5.4</span>
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<div class="title">Creating a real-time MIDI driver </div> </div>
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<div class="textblock"><p>FluidSynth can process real-time MIDI events received from hardware MIDI ports or other applications. To do so, the client must create a MIDI input driver. It is a very similar process to the creation of the audio driver: you initialize some properties in a settings instance and call the <a class="el" href="group__midi__driver.html#ga367ff3729be7eb4b3d1669cbfebc4b2d" title="Create a new MIDI driver instance.">new_fluid_midi_driver()</a> function providing a callback function that will be invoked when a MIDI event is received. The following MIDI drivers are currently supported:</p>
<ul>
<li>jack: JACK Audio Connection Kit MIDI driver (Linux, Mac OS X)</li>
<li>oss: Open Sound System raw MIDI (Linux, Unix)</li>
<li>alsa_raw: ALSA raw MIDI interface (Linux)</li>
<li>alsa_seq: ALSA sequencer MIDI interface (Linux)</li>
<li>winmidi: Microsoft Windows MM System (Windows)</li>
<li>midishare: MIDI Share (Linux, Mac OS X)</li>
<li>coremidi: Apple CoreMIDI (Mac OS X)</li>
</ul>
<div class="fragment"><div class="line"><span class="preprocessor">#include <fluidsynth.h></span></div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> handle_midi_event(<span class="keywordtype">void</span>* data, <a class="code" href="group__Types.html#ga61c72b76e3ee344637994c3071f74d94">fluid_midi_event_t</a>* event)</div>
<div class="line">{</div>
<div class="line"> printf(<span class="stringliteral">"event type: %d\n"</span>, <a class="code" href="group__midi__events.html#gaa9a2f38a2f2f9c1dfca355973a441061">fluid_midi_event_get_type</a>(event));</div>
<div class="line">}</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 class="code" href="group__Types.html#gaa363402d3c77333b0f070ba531d034ba">fluid_settings_t</a>* settings;</div>
<div class="line"> <a class="code" href="group__Types.html#gab0f64d7ed81d7361e9600e4a480828df">fluid_midi_driver_t</a>* mdriver;</div>
<div class="line"> settings = <a class="code" href="group__settings.html#ga7623af35fb3d1abace21ef7d5b4f4781">new_fluid_settings</a>();</div>
<div class="line"> mdriver = <a class="code" href="group__midi__driver.html#ga367ff3729be7eb4b3d1669cbfebc4b2d">new_fluid_midi_driver</a>(settings, handle_midi_event, NULL);</div>
<div class="line"> <span class="comment">/* ... */</span> </div>
<div class="line"> <a class="code" href="group__midi__driver.html#ga9cc2de57a119849b23699e227b17666d">delete_fluid_midi_driver</a>(mdriver);</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="ttc" id="agroup__Types_html_ga61c72b76e3ee344637994c3071f74d94"><div class="ttname"><a href="group__Types.html#ga61c72b76e3ee344637994c3071f74d94">fluid_midi_event_t</a></div><div class="ttdeci">struct _fluid_midi_event_t fluid_midi_event_t</div><div class="ttdoc">MIDI event.</div><div class="ttdef"><b>Definition:</b> types.h:48</div></div>
<div class="ttc" id="agroup__Types_html_gaa363402d3c77333b0f070ba531d034ba"><div class="ttname"><a href="group__Types.html#gaa363402d3c77333b0f070ba531d034ba">fluid_settings_t</a></div><div class="ttdeci">struct _fluid_hashtable_t fluid_settings_t</div><div class="ttdoc">Configuration settings instance.</div><div class="ttdef"><b>Definition:</b> types.h:37</div></div>
<div class="ttc" id="agroup__Types_html_gab0f64d7ed81d7361e9600e4a480828df"><div class="ttname"><a href="group__Types.html#gab0f64d7ed81d7361e9600e4a480828df">fluid_midi_driver_t</a></div><div class="ttdeci">struct _fluid_midi_driver_t fluid_midi_driver_t</div><div class="ttdoc">MIDI driver instance.</div><div class="ttdef"><b>Definition:</b> types.h:49</div></div>
<div class="ttc" id="agroup__midi__driver_html_ga367ff3729be7eb4b3d1669cbfebc4b2d"><div class="ttname"><a href="group__midi__driver.html#ga367ff3729be7eb4b3d1669cbfebc4b2d">new_fluid_midi_driver</a></div><div class="ttdeci">fluid_midi_driver_t * new_fluid_midi_driver(fluid_settings_t *settings, handle_midi_event_func_t handler, void *event_handler_data)</div><div class="ttdoc">Create a new MIDI driver instance.</div><div class="ttdef"><b>Definition:</b> fluid_mdriver.c:146</div></div>
<div class="ttc" id="agroup__midi__driver_html_ga9cc2de57a119849b23699e227b17666d"><div class="ttname"><a href="group__midi__driver.html#ga9cc2de57a119849b23699e227b17666d">delete_fluid_midi_driver</a></div><div class="ttdeci">void delete_fluid_midi_driver(fluid_midi_driver_t *driver)</div><div class="ttdoc">Delete a MIDI driver instance.</div><div class="ttdef"><b>Definition:</b> fluid_mdriver.c:191</div></div>
<div class="ttc" id="agroup__midi__events_html_gaa9a2f38a2f2f9c1dfca355973a441061"><div class="ttname"><a href="group__midi__events.html#gaa9a2f38a2f2f9c1dfca355973a441061">fluid_midi_event_get_type</a></div><div class="ttdeci">int fluid_midi_event_get_type(const fluid_midi_event_t *evt)</div><div class="ttdoc">Get the event type field of a MIDI event structure.</div><div class="ttdef"><b>Definition:</b> fluid_midi.c:1122</div></div>
<div class="ttc" id="agroup__settings_html_ga7623af35fb3d1abace21ef7d5b4f4781"><div class="ttname"><a href="group__settings.html#ga7623af35fb3d1abace21ef7d5b4f4781">new_fluid_settings</a></div><div class="ttdeci">fluid_settings_t * new_fluid_settings(void)</div><div class="ttdoc">Create a new settings object.</div><div class="ttdef"><b>Definition:</b> fluid_settings.c:261</div></div>
</div><!-- fragment --><p>There are a number of general MIDI driver settings. The <a class="el" href="settings_midi.html#settings_midi_driver">midi.driver</a> setting defines the MIDI subsystem that will be used. There are additional settings for the MIDI subsystems used. For a full list of available <b>midi driver settings</b>, please refer to the <a class="el" href="settings_midi.html">MIDI driver settings</a> documentation. </p>
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