mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-10-29 05:40:25 -04:00
Takashi Iwai <iwai@ww.uni-erlangen.de> Mon, 30 Aug 1999 14:56:38 +0200
This commit is contained in:
Jaroslav Kysela
parent
f247f920e1
commit
11ce43d87c
4 changed files with 82 additions and 98 deletions
162
test/playmidi1.c
162
test/playmidi1.c
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@ -12,6 +12,9 @@
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* - fix tempo event bug
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* - add command line options
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*
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* 19990827 Takashi Iwai <iwai@ww.uni-erlangen.de>
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* - use snd_seq_alloc_queue()
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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@ -49,7 +52,6 @@
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#define USE_BLOCKING_MODE
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/* default destination queue, client and port numbers */
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#define DEST_QUEUE_NUMBER 7
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#define DEST_CLIENT_NUMBER 65
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#define DEST_PORT_NUMBER 0
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@ -66,7 +68,7 @@ static double local_secs = 0;
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static int local_ticks = 0;
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static int local_tempo = 500000;
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static int dest_queue = DEST_QUEUE_NUMBER;
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static int dest_queue = 0;
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static int dest_client = DEST_CLIENT_NUMBER;
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static int dest_port = DEST_PORT_NUMBER;
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static int source_channel = 0;
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@ -413,38 +415,11 @@ static void do_sysex(int len, char *msg)
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write_ev_var(&ev, len, msg);
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}
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/* synchronize to the end of event */
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static void alsa_sync(void)
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static snd_seq_event_t *wait_for_event(void)
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{
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int left;
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snd_seq_event_t* input_event;
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snd_seq_event_t ev;
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snd_seq_event_t *input_event;
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/* send echo event to self client. */
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if (verbose >= VERB_MUCH)
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printf("alsa_sync syncing... send ECHO(%d) event to myself. time=%f\n",
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SND_SEQ_EVENT_ECHO, (double) Mf_currtime+1);
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ev.source.port = source_port;
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ev.source.channel = source_channel;
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ev.dest.queue = dest_queue;
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ev.dest.client = snd_seq_client_id(seq_handle);
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ev.dest.port = source_port;
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ev.dest.channel = 0; /* don't care */
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#ifdef USE_REALTIME
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ev.flags = SND_SEQ_TIME_STAMP_REAL | SND_SEQ_TIME_MODE_ABS;
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tick2time(&ev.time.real, Mf_currtime+1);
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#else
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ev.flags = SND_SEQ_TIME_STAMP_TICK | SND_SEQ_TIME_MODE_ABS;
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ev.time.tick = Mf_currtime+1;
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#endif
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ev.type = SND_SEQ_EVENT_ECHO;
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write_ev(&ev);
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/* dump buffer */
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left = snd_seq_flush_output(seq_handle);
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/* wait for the timer start event */
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#ifdef USE_BLOCKING_MODE
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/* read event - blocked until any event is read */
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left = snd_seq_event_input(seq_handle, &input_event);
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@ -465,14 +440,54 @@ static void alsa_sync(void)
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#endif
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if (left < 0) {
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printf("alsa_sync error!:%s\n", snd_strerror(left));
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return;
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return NULL;
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}
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if (verbose >= VERB_MUCH)
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printf("alsa_sync got event. type=%d, flags=%d\n",
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input_event->type, input_event->flags);
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snd_seq_free_event(input_event);
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return input_event;
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}
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/* synchronize to the end of event */
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static void alsa_sync(void)
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{
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int left;
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snd_seq_event_t *input_event;
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snd_seq_event_t ev;
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/* send echo event to self client. */
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if (verbose >= VERB_MUCH)
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printf("alsa_sync syncing... send ECHO(%d) event to myself. time=%f\n",
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SND_SEQ_EVENT_ECHO, (double) Mf_currtime+1);
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ev.source.port = source_port;
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ev.dest.queue = dest_queue;
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ev.dest.client = snd_seq_client_id(seq_handle);
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ev.dest.port = source_port;
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ev.dest.channel = 0; /* don't care */
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#ifdef USE_REALTIME
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ev.flags = SND_SEQ_TIME_STAMP_REAL | SND_SEQ_TIME_MODE_ABS;
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tick2time(&ev.time.real, Mf_currtime+1);
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#else
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ev.flags = SND_SEQ_TIME_STAMP_TICK | SND_SEQ_TIME_MODE_ABS;
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ev.time.tick = Mf_currtime+1;
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#endif
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ev.type = SND_SEQ_EVENT_ECHO;
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write_ev(&ev);
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/* dump buffer */
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left = snd_seq_flush_output(seq_handle);
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/* wait for the timer start event */
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for (;;) {
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input_event = wait_for_event();
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if (input_event) {
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if (verbose >= VERB_MUCH)
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printf("alsa_sync got event. type=%d, flags=%d\n",
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input_event->type, input_event->flags);
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if (input_event->type == SND_SEQ_EVENT_ECHO)
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break;
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snd_seq_free_event(input_event);
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}
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}
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if (verbose >= VERB_MUCH)
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printf("alsa_sync synced\n");
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}
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@ -481,41 +496,21 @@ static void alsa_sync(void)
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/* wait for start of the queue */
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static void wait_start(void)
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{
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int left;
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snd_seq_event_t* input_event;
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/* wait the start event from the system timer */
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do {
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#ifdef USE_BLOCKING_MODE
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/* read event - blocked until any event is read */
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left = snd_seq_event_input(seq_handle, &input_event);
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#else
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/* read event - using select syscall */
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while ((left = snd_seq_event_input(seq_handle, &input_event)) >= 0 &&
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input_event == NULL) {
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int seqfd;
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fd_set fds;
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seqfd = snd_seq_file_descriptor(seq_handle);
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FD_ZERO(&fds);
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FD_SET(seqfd, &fds);
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if ((left = select(seqfd + 1, &fds, NULL, NULL, NULL)) < 0) {
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printf("select error = %i (%s)\n", left, snd_strerror(left));
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exit(1);
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}
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}
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#endif
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if (left < 0) {
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printf("alsa_sync error!:%s\n", snd_strerror(left));
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return;
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}
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snd_seq_event_t *input_event;
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if (verbose >= VERB_MUCH)
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printf("wait_start got event. type=%d, flags=%d\n",
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input_event->type, input_event->flags);
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snd_seq_free_event(input_event);
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} while (input_event->type != SND_SEQ_EVENT_START);
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/* wait the start event from the system timer */
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for (;;) {
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input_event = wait_for_event();
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if (input_event) {
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if (verbose >= VERB_MUCH)
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printf("wait_start got event. type=%d, flags=%d\n",
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input_event->type, input_event->flags);
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if (input_event->type == SND_SEQ_EVENT_START &&
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input_event->data.addr.queue == dest_queue)
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break;
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snd_seq_free_event(input_event);
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}
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}
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if (verbose >= VERB_MUCH)
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printf("start received\n");
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}
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@ -527,30 +522,25 @@ static void usage(void)
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fprintf(stderr, "usage: playmidi1 [options] [file]\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, " -a queue:client:port : set destination address (default=%d:%d:%d)\n",
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DEST_QUEUE_NUMBER, DEST_CLIENT_NUMBER, DEST_PORT_NUMBER);
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fprintf(stderr, " -a client:port : set destination address (default=%d:%d)\n",
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DEST_CLIENT_NUMBER, DEST_PORT_NUMBER);
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fprintf(stderr, " -s: slave mode (allow external clock synchronisation)\n");
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}
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/* parse destination address (-a option) */
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void parse_address(char *arg, int *queuep, int *clientp, int *portp)
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void parse_address(char *arg, int *clientp, int *portp)
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{
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char *next;
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*queuep = atoi(arg);
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if ((next = strchr(arg, ':')) != NULL) {
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*clientp = atoi(next + 1);
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if ((next = strchr(next + 1, ':')) != NULL)
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*portp = atoi(next + 1);
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}
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*clientp = atoi(arg);
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if ((next = strchr(arg, ':')) != NULL)
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*portp = atoi(next + 1);
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}
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int main(int argc, char *argv[])
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{
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snd_seq_client_info_t inf;
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snd_seq_port_info_t src_port_info;
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snd_seq_queue_client_t queue_info;
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snd_seq_port_subscribe_t subscribe;
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snd_seq_client_pool_t pool;
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int tmp;
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@ -562,7 +552,7 @@ int main(int argc, char *argv[])
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verbose++;
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break;
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case 'a':
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parse_address(optarg, &dest_queue, &dest_client, &dest_port);
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parse_address(optarg, &dest_client, &dest_port);
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break;
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case 's':
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slave = 1;
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@ -630,11 +620,9 @@ int main(int argc, char *argv[])
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source_port = src_port_info.port;
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/* setup queue */
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bzero(&queue_info,sizeof(queue_info));
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queue_info.used = 1;
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tmp = snd_seq_set_queue_client(seq_handle, dest_queue, &queue_info);
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if (tmp < 0) {
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perror("queue_client");
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dest_queue = snd_seq_alloc_queue(seq_handle);
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if (dest_queue < 0) {
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perrror("alloc queue");
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exit(1);
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}
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