<!-- This comment will put IE 6, 7 and 8 in quirks mode --> <!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"/> <title>ALSA project - the C library reference: /test/rawmidi.c</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javaScript" src="search/search.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body onload='searchBox.OnSelectItem(0);'> <!-- Generated by Doxygen 1.6.3 --> <script type="text/javascript"><!-- var searchBox = new SearchBox("searchBox", "search",false,'Search'); --></script> <div class="navigation" id="top"> <div class="tabs"> <ul> <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> <li><a href="examples.html"><span>Examples</span></a></li> <li> <div id="MSearchBox" class="MSearchBoxInactive"> <img id="MSearchSelect" src="search/search.png" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" alt=""/> <input type="text" id="MSearchField" value="Search" accesskey="S" onfocus="searchBox.OnSearchFieldFocus(true)" onblur="searchBox.OnSearchFieldFocus(false)" onkeyup="searchBox.OnSearchFieldChange(event)"/> <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a> </div> </li> </ul> </div> </div> <div class="contents"> <h1>/test/rawmidi.c</h1><p><a class="anchor" id="example_test_rawmidi"></a></p> <div class="fragment"><pre class="fragment"><span class="preprocessor">#include <stdio.h></span> <span class="preprocessor">#include <stdlib.h></span> <span class="preprocessor">#include <ctype.h></span> <span class="preprocessor">#include "../include/asoundlib.h"</span> <span class="preprocessor">#include <signal.h></span> <span class="keyword">static</span> <span class="keywordtype">void</span> usage(<span class="keywordtype">void</span>) { fprintf(stderr, <span class="stringliteral">"usage: rawmidi [options]\n"</span>); fprintf(stderr, <span class="stringliteral">" options:\n"</span>); fprintf(stderr, <span class="stringliteral">" -v: verbose mode\n"</span>); fprintf(stderr, <span class="stringliteral">" -i device-id : test ALSA input device\n"</span>); fprintf(stderr, <span class="stringliteral">" -o device-id : test ALSA output device\n"</span>); fprintf(stderr, <span class="stringliteral">" -I node : test input node\n"</span>); fprintf(stderr, <span class="stringliteral">" -O node : test output node\n"</span>); fprintf(stderr, <span class="stringliteral">" -t: test midi thru\n"</span>); fprintf(stderr, <span class="stringliteral">" example:\n"</span>); fprintf(stderr, <span class="stringliteral">" rawmidi -i hw:0,0 -O /dev/midi1\n"</span>); fprintf(stderr, <span class="stringliteral">" tests input for card 0, device 0, using snd_rawmidi API\n"</span>); fprintf(stderr, <span class="stringliteral">" and /dev/midi1 using file descriptors\n"</span>); } <span class="keywordtype">int</span> stop=0; <span class="keywordtype">void</span> sighandler(<span class="keywordtype">int</span> dum) { stop=1; } <span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc,<span class="keywordtype">char</span>** argv) { <span class="keywordtype">int</span> i; <span class="keywordtype">int</span> err; <span class="keywordtype">int</span> thru=0; <span class="keywordtype">int</span> verbose = 0; <span class="keywordtype">char</span> *device_in = NULL; <span class="keywordtype">char</span> *device_out = NULL; <span class="keywordtype">char</span> *node_in = NULL; <span class="keywordtype">char</span> *node_out = NULL; <span class="keywordtype">int</span> fd_in = -1,fd_out = -1; <a name="a0"></a><a class="code" href="group___raw_midi.html#gaa21972df6ca3ebde0f7225b2472d0095">snd_rawmidi_t</a> *handle_in = 0,*handle_out = 0; <span class="keywordflow">if</span> (argc==1) { usage(); exit(0); } <span class="keywordflow">for</span> (i = 1 ; i<argc ; i++) { <span class="keywordflow">if</span> (argv[i][0]==<span class="charliteral">'-'</span>) { <span class="keywordflow">switch</span> (argv[i][1]) { <span class="keywordflow">case</span> <span class="charliteral">'h'</span>: usage(); <span class="keywordflow">break</span>; <span class="keywordflow">case</span> <span class="charliteral">'v'</span>: verbose = 1; <span class="keywordflow">break</span>; <span class="keywordflow">case</span> <span class="charliteral">'t'</span>: thru = 1; <span class="keywordflow">break</span>; <span class="keywordflow">case</span> <span class="charliteral">'i'</span>: <span class="keywordflow">if</span> (i + 1 < argc) device_in = argv[++i]; <span class="keywordflow">break</span>; <span class="keywordflow">case</span> <span class="charliteral">'I'</span>: <span class="keywordflow">if</span> (i + 1 < argc) node_in = argv[++i]; <span class="keywordflow">break</span>; <span class="keywordflow">case</span> <span class="charliteral">'o'</span>: <span class="keywordflow">if</span> (i + 1 < argc) device_out = argv[++i]; <span class="keywordflow">break</span>; <span class="keywordflow">case</span> <span class="charliteral">'O'</span>: <span class="keywordflow">if</span> (i + 1 < argc) node_out = argv[++i]; <span class="keywordflow">break</span>; } } } <span class="keywordflow">if</span> (verbose) { fprintf(stderr,<span class="stringliteral">"Using: \n"</span>); fprintf(stderr,<span class="stringliteral">"Input: "</span>); <span class="keywordflow">if</span> (device_in) { fprintf(stderr,<span class="stringliteral">"device %s\n"</span>,device_in); }<span class="keywordflow">else</span> <span class="keywordflow">if</span> (node_in){ fprintf(stderr,<span class="stringliteral">"%s\n"</span>,node_in); }<span class="keywordflow">else</span>{ fprintf(stderr,<span class="stringliteral">"NONE\n"</span>); } fprintf(stderr,<span class="stringliteral">"Output: "</span>); <span class="keywordflow">if</span> (device_out) { fprintf(stderr,<span class="stringliteral">"device %s\n"</span>,device_out); }<span class="keywordflow">else</span> <span class="keywordflow">if</span> (node_out){ fprintf(stderr,<span class="stringliteral">"%s\n"</span>,node_out); }<span class="keywordflow">else</span>{ fprintf(stderr,<span class="stringliteral">"NONE\n"</span>); } } <span class="keywordflow">if</span> (device_in) { err = <a name="a1"></a><a class="code" href="group___raw_midi.html#ga2ab783051deeb7eb37eb568b76448889" title="Opens a new connection to the RawMidi interface.">snd_rawmidi_open</a>(&handle_in,NULL,device_in,0); <span class="keywordflow">if</span> (err) { fprintf(stderr,<span class="stringliteral">"snd_rawmidi_open %s failed: %d\n"</span>,device_in,err); } } <span class="keywordflow">if</span> (node_in && (!node_out || strcmp(node_out,node_in))) { fd_in = open(node_in,O_RDONLY); <span class="keywordflow">if</span> (fd_in<0) { fprintf(stderr,<span class="stringliteral">"open %s for input failed\n"</span>,node_in); } } signal(SIGINT,sighandler); <span class="keywordflow">if</span> (device_out) { err = <a class="code" href="group___raw_midi.html#ga2ab783051deeb7eb37eb568b76448889" title="Opens a new connection to the RawMidi interface.">snd_rawmidi_open</a>(NULL,&handle_out,device_out,0); <span class="keywordflow">if</span> (err) { fprintf(stderr,<span class="stringliteral">"snd_rawmidi_open %s failed: %d\n"</span>,device_out,err); } } <span class="keywordflow">if</span> (node_out && (!node_in || strcmp(node_out,node_in))) { fd_out = open(node_out,O_WRONLY); <span class="keywordflow">if</span> (fd_out<0) { fprintf(stderr,<span class="stringliteral">"open %s for output failed\n"</span>,node_out); } } <span class="keywordflow">if</span> (node_in && node_out && strcmp(node_out,node_in)==0) { fd_in = fd_out = open(node_out,O_RDWR); <span class="keywordflow">if</span> (fd_out<0) { fprintf(stderr,<span class="stringliteral">"open %s for input and output failed\n"</span>,node_out); } } <span class="keywordflow">if</span> (!thru) { <span class="keywordflow">if</span> (handle_in || fd_in!=-1) { fprintf(stderr,<span class="stringliteral">"Read midi in\n"</span>); fprintf(stderr,<span class="stringliteral">"Press ctrl-c to stop\n"</span>); } <span class="keywordflow">if</span> (handle_in) { <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch; <span class="keywordflow">while</span> (!stop) { <a name="a2"></a><a class="code" href="group___raw_midi.html#ga9b0952fc04facda83cdf1521325ca475" title="read MIDI bytes from MIDI stream">snd_rawmidi_read</a>(handle_in,&ch,1); <span class="keywordflow">if</span> (verbose) { fprintf(stderr,<span class="stringliteral">"read %02x\n"</span>,ch); } } } <span class="keywordflow">if</span> (fd_in!=-1) { <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch; <span class="keywordflow">while</span> (!stop) { read(fd_in,&ch,1); <span class="keywordflow">if</span> (verbose) { fprintf(stderr,<span class="stringliteral">"read %02x\n"</span>,ch); } } } <span class="keywordflow">if</span> (handle_out || fd_out!=-1) { fprintf(stderr,<span class="stringliteral">"Writing note on / note off\n"</span>); } <span class="keywordflow">if</span> (handle_out) { <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch; ch=0x90; <a name="a3"></a><a class="code" href="group___raw_midi.html#ga0a30e482efec57f4ea74c533a0f9b134" title="write MIDI bytes to MIDI stream">snd_rawmidi_write</a>(handle_out,&ch,1); ch=60; <a class="code" href="group___raw_midi.html#ga0a30e482efec57f4ea74c533a0f9b134" title="write MIDI bytes to MIDI stream">snd_rawmidi_write</a>(handle_out,&ch,1); ch=100; <a class="code" href="group___raw_midi.html#ga0a30e482efec57f4ea74c533a0f9b134" title="write MIDI bytes to MIDI stream">snd_rawmidi_write</a>(handle_out,&ch,1); <a name="a4"></a><a class="code" href="group___raw_midi.html#gabfff7417ec957b7ee07882f91d73d7be" title="drain all bytes in the rawmidi I/O ring buffer">snd_rawmidi_drain</a>(handle_out); sleep(1); ch=0x90; <a class="code" href="group___raw_midi.html#ga0a30e482efec57f4ea74c533a0f9b134" title="write MIDI bytes to MIDI stream">snd_rawmidi_write</a>(handle_out,&ch,1); ch=60; <a class="code" href="group___raw_midi.html#ga0a30e482efec57f4ea74c533a0f9b134" title="write MIDI bytes to MIDI stream">snd_rawmidi_write</a>(handle_out,&ch,1); ch=0; <a class="code" href="group___raw_midi.html#ga0a30e482efec57f4ea74c533a0f9b134" title="write MIDI bytes to MIDI stream">snd_rawmidi_write</a>(handle_out,&ch,1); <a class="code" href="group___raw_midi.html#gabfff7417ec957b7ee07882f91d73d7be" title="drain all bytes in the rawmidi I/O ring buffer">snd_rawmidi_drain</a>(handle_out); } <span class="keywordflow">if</span> (fd_out!=-1) { <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch; ch=0x90; write(fd_out,&ch,1); ch=60; write(fd_out,&ch,1); ch=100; write(fd_out,&ch,1); sleep(1); ch=0x90; write(fd_out,&ch,1); ch=60; write(fd_out,&ch,1); ch=0; write(fd_out,&ch,1); } } <span class="keywordflow">else</span> { <span class="keywordflow">if</span> ((handle_in || fd_in!=-1) && (handle_out || fd_out!=-1)) { <span class="keywordflow">if</span> (verbose) { fprintf(stderr,<span class="stringliteral">"Testing midi thru in\n"</span>); } <span class="keywordflow">while</span> (!stop) { <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch; <span class="keywordflow">if</span> (handle_in) { <a class="code" href="group___raw_midi.html#ga9b0952fc04facda83cdf1521325ca475" title="read MIDI bytes from MIDI stream">snd_rawmidi_read</a>(handle_in,&ch,1); } <span class="keywordflow">if</span> (fd_in!=-1) { read(fd_in,&ch,1); } <span class="keywordflow">if</span> (verbose) { fprintf(stderr,<span class="stringliteral">"thru: %02x\n"</span>,ch); } <span class="keywordflow">if</span> (handle_out) { <a class="code" href="group___raw_midi.html#ga0a30e482efec57f4ea74c533a0f9b134" title="write MIDI bytes to MIDI stream">snd_rawmidi_write</a>(handle_out,&ch,1); <a class="code" href="group___raw_midi.html#gabfff7417ec957b7ee07882f91d73d7be" title="drain all bytes in the rawmidi I/O ring buffer">snd_rawmidi_drain</a>(handle_out); } <span class="keywordflow">if</span> (fd_out!=-1) { write(fd_out,&ch,1); } } }<span class="keywordflow">else</span>{ fprintf(stderr,<span class="stringliteral">"Testing midi thru needs both input and output\n"</span>); exit(-1); } } <span class="keywordflow">if</span> (verbose) { fprintf(stderr,<span class="stringliteral">"Closing\n"</span>); } <span class="keywordflow">if</span> (handle_in) { <a class="code" href="group___raw_midi.html#gabfff7417ec957b7ee07882f91d73d7be" title="drain all bytes in the rawmidi I/O ring buffer">snd_rawmidi_drain</a>(handle_in); <a name="a5"></a><a class="code" href="group___raw_midi.html#gabc6bd5922151fb50196f62b9a4ab9f56" title="close RawMidi handle">snd_rawmidi_close</a>(handle_in); } <span class="keywordflow">if</span> (handle_out) { <a class="code" href="group___raw_midi.html#gabfff7417ec957b7ee07882f91d73d7be" title="drain all bytes in the rawmidi I/O ring buffer">snd_rawmidi_drain</a>(handle_out); <a class="code" href="group___raw_midi.html#gabc6bd5922151fb50196f62b9a4ab9f56" title="close RawMidi handle">snd_rawmidi_close</a>(handle_out); } <span class="keywordflow">if</span> (fd_in!=-1) { close(fd_in); } <span class="keywordflow">if</span> (fd_out!=-1) { close(fd_out); } <span class="keywordflow">return</span> 0; } </pre></div> </div> <!--- window showing the filter options --> <div id="MSearchSelectWindow" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" onkeydown="return searchBox.OnSearchSelectKey(event)"> <a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Data Structures</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Defines</a></div> <!-- iframe showing the search results (closed by default) --> <div id="MSearchResultsWindow"> <iframe src="" frameborder="0" name="MSearchResults" id="MSearchResults"> </iframe> </div> <hr class="footer"/><address style="text-align: right;"><small>Generated on Sat Nov 20 07:42:23 2010 for ALSA project - the C library reference by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.3 </small></address> </body> </html>