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Added snd_seq_sync_output_queue() function.

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Rewrote playmidi1 to use this function.  It is no longer necessary
to wait for echoback.
This commit is contained in:
Takashi Iwai 2001-09-03 10:41:18 +00:00
parent 7b6eeb64de
commit 0791fb2848
3 changed files with 59 additions and 49 deletions
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39
src/seq/seqmid.c
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@ -313,12 +313,47 @@ int snd_seq_reset_pool_input(snd_seq_t *seq)
return snd_seq_remove_events(seq, &rmp);
}
/**
* \brief drain output queue
* \param seq sequencer handle
* \return 0 on success or negative error code
*/
int snd_seq_sync_output_queue(snd_seq_t *seq)
{
int err;
snd_seq_client_pool_t info;
int saved_room;
struct pollfd pfd;
assert(seq);
/* reprogram the room size to full */
if ((err = snd_seq_get_client_pool(seq, &info)) < 0)
return err;
saved_room = info.output_room;
info.output_room = info.output_pool; /* wait until all gone */
if ((err = snd_seq_set_client_pool(seq, &info)) < 0)
return err;
/* wait until all events are purged */
pfd.fd = seq->poll_fd;
pfd.events = POLLOUT;
err = poll(&pfd, 1, -1);
/* restore the room size */
info.output_room = saved_room;
snd_seq_set_client_pool(seq, &info);
return err;
}
/**
* \brief parse the given string and get the sequencer address
* \param seq sequencer handle
* \param addr the address pointer to be returned
* \param arg the string to be parsed
* \return 0 on success or negative error code
*
* This function parses the sequencer client and port numbers from the given string.
* The client and port tokes are separated by either colon or period, e.g. 128:1.
* When \a seq is not NULL, the function accepts also a client name not only
* digit numbers.
*/
int snd_seq_parse_address(snd_seq_t *seq, snd_seq_addr_t *addr, const char *arg)
{
@ -326,7 +361,7 @@ int snd_seq_parse_address(snd_seq_t *seq, snd_seq_addr_t *addr, const char *arg)
int client, port;
int len;
assert(seq && addr && arg);
assert(addr && arg);
if ((p = strpbrk(arg, ":.")) != NULL) {
if ((port = atoi(p + 1)) < 0)
@ -346,6 +381,8 @@ int snd_seq_parse_address(snd_seq_t *seq, snd_seq_addr_t *addr, const char *arg)
/* convert from the name */
snd_seq_client_info_t cinfo;
if (! seq)
return -EINVAL;
*p = 0;
if (len <= 0)
return -EINVAL;