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<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>
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