mirror of
https://github.com/alsa-project/alsa-lib.git
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Added midiloop utility..
This commit is contained in:
Jaroslav Kysela
parent
845add2af5
commit
744c87fd12
2 changed files with 211 additions and 1 deletions
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@ -1,5 +1,5 @@
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check_PROGRAMS=control mixer switches pause pcm pcmtest latency seq \
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playmidi1 timer loopback rawmidi
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playmidi1 timer loopback rawmidi midiloop
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control_LDADD=../src/libasound.la
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mixer_LDADD=../src/libasound.la
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@ -13,6 +13,7 @@ playmidi1_LDADD=../src/libasound.la
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timer_LDADD=../src/libasound.la
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loopback_LDADD=../src/libasound.la
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rawmidi_LDADD=../src/libasound.la
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midiloop_LDADD=../src/libasound.la
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INCLUDES=-I$(top_srcdir)/include
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CFLAGS=-static -Wall -pipe -g
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209
test/midiloop.c
Normal file
209
test/midiloop.c
Normal file
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@ -0,0 +1,209 @@
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#include <stdlib.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <sys/asoundlib.h>
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#include <string.h>
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#include <signal.h>
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static void usage(void)
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{
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fprintf(stderr, "Usage: midiloop [options]\n");
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fprintf(stderr, " options:\n");
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fprintf(stderr, " -v: verbose mode\n");
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fprintf(stderr, " -i [ card-id device-id ] : test input device\n");
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fprintf(stderr, " -o [ card-id device-id ] : test output device\n");
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}
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int stop = 0;
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void sighandler(int dum)
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{
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stop=1;
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}
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long long timediff(struct timeval t1, struct timeval t2)
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{
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signed long l;
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t1.tv_sec -= t2.tv_sec;
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l = (signed long) t1.tv_usec - (signed long) t2.tv_usec;
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if (l < 0) {
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t1.tv_sec--;
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l = -l;
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l %= 1000000;
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}
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return ((long long)t1.tv_sec * (long long)1000000) + (long long)l;
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}
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int writepattern(snd_rawmidi_t *handle_out, unsigned char *obuf)
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{
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int patsize, i;
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patsize = 0;
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for (i = 0; i < 15; i++) {
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obuf[patsize++] = 0x90 + i;
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obuf[patsize++] = 0x40;
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obuf[patsize++] = 0x3f;
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obuf[patsize++] = 0xb0 + i;
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obuf[patsize++] = 0x2e;
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obuf[patsize++] = 0x7a;
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obuf[patsize++] = 0x80 + i;
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obuf[patsize++] = 0x23;
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obuf[patsize++] = 0x24;
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obuf[patsize++] = 0x25;
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obuf[patsize++] = 0x26;
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}
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i = snd_rawmidi_write(handle_out, obuf, patsize);
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if (i != patsize) {
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printf("Written only %i bytes from %i bytes\n", i, patsize);
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exit(EXIT_FAILURE);
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}
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return patsize;
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}
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int main(int argc, char** argv)
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{
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int i, j, k, opos, ipos, patsize;
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int err;
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int verbose = 0;
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int card_in = -1, device_in = 0;
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int card_out = -1, device_out = 0;
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snd_rawmidi_t *handle_in = NULL, *handle_out = NULL;
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unsigned char ibuf[512], obuf[512];
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struct timeval start, end;
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long long diff;
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snd_rawmidi_status_t istat, ostat;
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if (argc == 1) {
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usage();
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exit(EXIT_SUCCESS);
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}
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for (i = 1 ; i<argc ; i++) {
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if (argv[i][0]=='-') {
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switch (argv[i][1]) {
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case 'h':
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usage();
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break;
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case 'v':
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verbose = 1;
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break;
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case 'i':
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card_in = atoi(argv[i+1]);
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if (isdigit(argv[i+2][0])) {
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device_in = atoi(argv[i+2]);
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} else {
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fprintf(stderr,"Error: -i with card_id, but missing device id\n");
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exit(-1);
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}
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i+=2;
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break;
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case 'o':
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card_out = atoi(argv[i+1]);
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if (isdigit(argv[i+2][0])) {
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device_out = atoi(argv[i+2]);
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}else{
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fprintf(stderr,"Error: -i with card_id, but missing device id\n");
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exit(EXIT_FAILURE);
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}
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break;
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}
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}
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}
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if (card_in == -1 && card_out == -1) {
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fprintf(stderr, "specify at least one device\n");
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exit(EXIT_FAILURE);
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}
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if (card_in == -1)
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card_in = card_out;
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if (card_out == -1)
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card_out = card_in;
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if (verbose) {
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fprintf(stderr, "Using: \n");
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fprintf(stderr, " Input: ");
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fprintf(stderr, "card %d, device %d\n", card_in, device_in);
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fprintf(stderr, " Output: ");
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fprintf(stderr, "card %d, device %d\n", card_out, device_out);
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}
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err = snd_rawmidi_open(&handle_in, card_in, device_in, SND_RAWMIDI_OPEN_INPUT | SND_RAWMIDI_OPEN_NONBLOCK);
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if (err) {
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fprintf(stderr,"snd_rawmidi_open %d %d failed: %d\n",card_in,device_in,err);
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exit(EXIT_FAILURE);
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}
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err = snd_rawmidi_open(&handle_out, card_out, device_out, SND_RAWMIDI_OPEN_OUTPUT);
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if (err) {
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fprintf(stderr,"snd_rawmidi_open %d %d failed: %d\n",card_out,device_out,err);
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exit(EXIT_FAILURE);
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}
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signal(SIGINT, sighandler);
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i = snd_rawmidi_read(handle_in, ibuf, sizeof(ibuf));
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if (i > 0) {
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printf("Read ahead: %i\n", i);
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for (j = 0; j < i; j++)
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printf("%02x:", ibuf[j]);
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printf("\n");
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exit(EXIT_FAILURE);
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}
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patsize = writepattern(handle_out, obuf);
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gettimeofday(&start, NULL);
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patsize = writepattern(handle_out, obuf);
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k = ipos = opos = err = 0;
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while (!stop) {
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i = snd_rawmidi_read(handle_in, ibuf, sizeof(ibuf));
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for (j = 0; j < i; j++, ipos++)
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if (obuf[k] != ibuf[j]) {
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printf("ipos = %i, i[0x%x] != o[0x%x]\n", ipos, ibuf[j], obuf[k]);
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if (opos > 0)
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stop = 1;
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} else {
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printf("match success: ipos = %i, opos = %i [%i:0x%x]\n", ipos, opos, k, obuf[k]);
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k++; opos++;
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if (k >= patsize) {
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patsize = writepattern(handle_out, obuf);
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k = 0;
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}
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}
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}
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gettimeofday(&end, NULL);
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printf("End...\n");
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bzero(&istat, sizeof(istat));
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bzero(&ostat, sizeof(ostat));
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istat.channel = SND_RAWMIDI_CHANNEL_INPUT;
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ostat.channel = SND_RAWMIDI_CHANNEL_OUTPUT;
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err = snd_rawmidi_channel_status(handle_in, &istat);
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if (err < 0)
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fprintf(stderr, "input channel status error: %d\n", err);
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err = snd_rawmidi_channel_status(handle_out, &ostat);
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if (err < 0)
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fprintf(stderr, "output channel status error: %d\n", err);
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printf("input.status.queue = %i\n", istat.queue);
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printf("input.status.overrun = %i\n", istat.overrun);
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printf("output.status.queue = %i\n", ostat.queue);
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printf("output.status.overrun = %i\n", ostat.overrun);
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diff = timediff(end, start);
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printf("Time diff: %Liusec (%Li bytes/sec)\n", diff, ((long long)opos * 1000000) / diff);
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if (verbose) {
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fprintf(stderr,"Closing\n");
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}
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snd_rawmidi_input_flush(handle_in);
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snd_rawmidi_close(handle_in);
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snd_rawmidi_output_flush(handle_out);
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snd_rawmidi_close(handle_out);
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return 0;
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}
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