Willkommen bei WordPress. Dies ist dein erster Beitrag. Bearbeite oder lösche ihn und beginne mit dem Schreiben!
Hallo Welt!
von raredesign | Dez 3, 2019 | Allgemein | 0 Kommentare
Cokiee Shell
| Current Path : /usr/share/doc/libjack-dev/HTML/ |
| Current File : //usr/share/doc/libjack-dev/HTML/group__MIDIAPI.html |
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<title>JACK-AUDIO-CONNECTION-KIT: Reading and writing MIDI data</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">JACK-AUDIO-CONNECTION-KIT
 <span id="projectnumber">0.122.0</span>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.1.2 -->
<div id="navrow1" class="tabs">
<ul class="tablist">
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="pages.html"><span>Related Pages</span></a></li>
<li><a href="modules.html"><span>Modules</span></a></li>
<li><a href="annotated.html"><span>Data Structures</span></a></li>
<li><a href="files.html"><span>Files</span></a></li>
</ul>
</div>
</div><!-- top -->
<div class="header">
<div class="summary">
<a href="#func-members">Functions</a> </div>
<div class="headertitle">
<div class="title">Reading and writing MIDI data</div> </div>
</div><!--header-->
<div class="contents">
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga0a87111085b94460401b0b688595a138"><td class="memItemLeft" align="right" valign="top"><a class="el" href="types_8h.html#aa954df532e901ae5172e68a23f3da9b6">jack_nframes_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__MIDIAPI.html#ga0a87111085b94460401b0b688595a138">jack_midi_get_event_count</a> (void *port_buffer) JACK_OPTIONAL_WEAK_EXPORT</td></tr>
<tr class="memitem:ga838c794bd1451bfd47edde1c7cd1ff4f"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__MIDIAPI.html#ga838c794bd1451bfd47edde1c7cd1ff4f">jack_midi_event_get</a> (<a class="el" href="midiport_8h.html#a2e564e80b61dd77ec3de99b8b9ab259e">jack_midi_event_t</a> *event, void *port_buffer, uint32_t event_index) JACK_OPTIONAL_WEAK_EXPORT</td></tr>
<tr class="memitem:ga7635c6e0a4eb2314a5fb5a058c278078"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__MIDIAPI.html#ga7635c6e0a4eb2314a5fb5a058c278078">jack_midi_clear_buffer</a> (void *port_buffer) JACK_OPTIONAL_WEAK_EXPORT</td></tr>
<tr class="memitem:gab69743a191f150757fa3708eae8fdb81"><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__MIDIAPI.html#gab69743a191f150757fa3708eae8fdb81">jack_midi_max_event_size</a> (void *port_buffer) JACK_OPTIONAL_WEAK_EXPORT</td></tr>
<tr class="memitem:ga150dcdc37583e1ecbe0a6f16b6ac48a9"><td class="memItemLeft" align="right" valign="top"><a class="el" href="midiport_8h.html#ad1df9c73b07584ffb69c276421ff55c9">jack_midi_data_t</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__MIDIAPI.html#ga150dcdc37583e1ecbe0a6f16b6ac48a9">jack_midi_event_reserve</a> (void *port_buffer, <a class="el" href="types_8h.html#aa954df532e901ae5172e68a23f3da9b6">jack_nframes_t</a> time, size_t data_size) JACK_OPTIONAL_WEAK_EXPORT</td></tr>
<tr class="memitem:gaa25503c07ac3c2ed62d79be9c25d42ed"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__MIDIAPI.html#gaa25503c07ac3c2ed62d79be9c25d42ed">jack_midi_event_write</a> (void *port_buffer, <a class="el" href="types_8h.html#aa954df532e901ae5172e68a23f3da9b6">jack_nframes_t</a> time, const <a class="el" href="midiport_8h.html#ad1df9c73b07584ffb69c276421ff55c9">jack_midi_data_t</a> *data, size_t data_size) JACK_OPTIONAL_WEAK_EXPORT</td></tr>
<tr class="memitem:ga0f5af3d054e218a5b90fd4c636425e45"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__MIDIAPI.html#ga0f5af3d054e218a5b90fd4c636425e45">jack_midi_get_lost_event_count</a> (void *port_buffer) JACK_OPTIONAL_WEAK_EXPORT</td></tr>
</table>
<a name="details" id="details"></a><h2>Detailed Description</h2>
<h2>Function Documentation</h2>
<a class="anchor" id="ga7635c6e0a4eb2314a5fb5a058c278078"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void jack_midi_clear_buffer </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>port_buffer</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Clear an event buffer.</p>
<p>This should be called at the beginning of each process cycle before calling <a class="el" href="group__MIDIAPI.html#ga150dcdc37583e1ecbe0a6f16b6ac48a9">jack_midi_event_reserve</a> or <a class="el" href="group__MIDIAPI.html#gaa25503c07ac3c2ed62d79be9c25d42ed">jack_midi_event_write</a>. This function may not be called on an input port's buffer.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">port_buffer</td><td>Port buffer to clear (must be an output port buffer). </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga838c794bd1451bfd47edde1c7cd1ff4f"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int jack_midi_event_get </td>
<td>(</td>
<td class="paramtype"><a class="el" href="midiport_8h.html#a2e564e80b61dd77ec3de99b8b9ab259e">jack_midi_event_t</a> * </td>
<td class="paramname"><em>event</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">void * </td>
<td class="paramname"><em>port_buffer</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint32_t </td>
<td class="paramname"><em>event_index</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Get a MIDI event from an event port buffer.</p>
<p>Jack MIDI is normalised, the MIDI event returned by this function is guaranteed to be a complete MIDI event (the status byte will always be present, and no realtime events will interspered with the event).</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">event</td><td>Event structure to store retrieved event in. </td></tr>
<tr><td class="paramname">port_buffer</td><td>Port buffer from which to retrieve event. </td></tr>
<tr><td class="paramname">event_index</td><td>Index of event to retrieve. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, ENODATA if buffer is empty. </dd></dl>
</div>
</div>
<a class="anchor" id="ga150dcdc37583e1ecbe0a6f16b6ac48a9"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="midiport_8h.html#ad1df9c73b07584ffb69c276421ff55c9">jack_midi_data_t</a>* jack_midi_event_reserve </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>port_buffer</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="types_8h.html#aa954df532e901ae5172e68a23f3da9b6">jack_nframes_t</a> </td>
<td class="paramname"><em>time</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>data_size</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Allocate space for an event to be written to an event port buffer.</p>
<p>Clients are to write the actual event data to be written starting at the pointer returned by this function. Clients must not write more than <em>data_size</em> bytes into this buffer. Clients must write normalised MIDI data to the port - no running status and no (1-byte) realtime messages interspersed with other messages (realtime messages are fine when they occur on their own, like other messages).</p>
<p>Events must be written in order, sorted by their sample offsets. JACK will not sort the events for you, and will refuse to store out-of-order events.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">port_buffer</td><td>Buffer to write event to. </td></tr>
<tr><td class="paramname">time</td><td>Sample offset of event. </td></tr>
<tr><td class="paramname">data_size</td><td>Length of event's raw data in bytes. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Pointer to the beginning of the reserved event's data buffer, or NULL on error (ie not enough space). </dd></dl>
</div>
</div>
<a class="anchor" id="gaa25503c07ac3c2ed62d79be9c25d42ed"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int jack_midi_event_write </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>port_buffer</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="types_8h.html#aa954df532e901ae5172e68a23f3da9b6">jack_nframes_t</a> </td>
<td class="paramname"><em>time</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="midiport_8h.html#ad1df9c73b07584ffb69c276421ff55c9">jack_midi_data_t</a> * </td>
<td class="paramname"><em>data</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>data_size</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Write an event into an event port buffer.</p>
<p>This function is simply a wrapper for <a class="el" href="group__MIDIAPI.html#ga150dcdc37583e1ecbe0a6f16b6ac48a9">jack_midi_event_reserve</a> which writes the event data into the space reserved in the buffer.</p>
<p>Clients must not write more than <em>data_size</em> bytes into this buffer. Clients must write normalised MIDI data to the port - no running status and no (1-byte) realtime messages interspersed with other messages (realtime messages are fine when they occur on their own, like other messages).</p>
<p>Events must be written in order, sorted by their sample offsets. JACK will not sort the events for you, and will refuse to store out-of-order events.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">port_buffer</td><td>Buffer to write event to. </td></tr>
<tr><td class="paramname">time</td><td>Sample offset of event. </td></tr>
<tr><td class="paramname">data</td><td>Message data to be written. </td></tr>
<tr><td class="paramname">data_size</td><td>Length of <em>data</em> in bytes. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, ENOBUFS if there's not enough space in buffer for event. </dd></dl>
</div>
</div>
<a class="anchor" id="ga0a87111085b94460401b0b688595a138"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="types_8h.html#aa954df532e901ae5172e68a23f3da9b6">jack_nframes_t</a> jack_midi_get_event_count </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>port_buffer</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="ga0f5af3d054e218a5b90fd4c636425e45"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">uint32_t jack_midi_get_lost_event_count </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>port_buffer</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Get the number of events that could not be written to <em>port_buffer</em>.</p>
<p>This function returning a non-zero value implies <em>port_buffer</em> is full. Currently the only way this can happen is if events are lost on port mixdown.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">port_buffer</td><td>Port to receive count for. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Number of events that could not be written to <em>port_buffer</em>. </dd></dl>
</div>
</div>
<a class="anchor" id="gab69743a191f150757fa3708eae8fdb81"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">size_t jack_midi_max_event_size </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>port_buffer</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Get the size of the largest event that can be stored by the port.</p>
<p>This function returns the current space available, taking into account events already stored in the port.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">port_buffer</td><td>Port buffer to check size of. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
</div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated on Sun Sep 30 2012 09:08:39 for JACK-AUDIO-CONNECTION-KIT by  <a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/>
</a> 1.8.1.2
</small></address>
</body>
</html>
Cokiee Shell Web 1.0, Coded By Razor
Neueste Kommentare