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Takashi Iwai <iwai@ww.uni-erlangen.de>

Browse source 
Tue, 16 Nov 1999 14:32:17 +0100
Some minor bug fixes in alsa-lib/seq.
This commit is contained in:
Jaroslav Kysela 1999-11-16 15:07:05 +00:00
parent 368d383feb
commit 2dc55fd684
2 changed files with 64 additions and 28 deletions
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88
src/seq/seq.c
View file

@ -376,48 +376,76 @@ int snd_seq_set_queue_client(snd_seq_t *seq, int q, snd_seq_queue_client_t * inf
return 0;
}
int snd_seq_alloc_queue(snd_seq_t *seq)
int snd_seq_alloc_named_queue(snd_seq_t *seq, char *name)
{
int i, err;
snd_seq_system_info_t sysinfo;
snd_seq_queue_owner_t owner;
snd_seq_queue_info_t info;
if (!seq)
return -EINVAL;
if ((err = snd_seq_system_info(seq, &sysinfo))<0)
return err;
for (i = 0; i < sysinfo.queues; i++) {
if ((err = snd_seq_get_queue_owner(seq, i, &owner))<0)
continue;
if (owner.locked)
continue;
owner.locked = 1;
owner.owner = seq->client;
if ((err = snd_seq_set_queue_owner(seq, i, &owner))<0)
continue;
return i;
}
return -EBUSY;
memset(&info, 0, sizeof(info));
info.owner = seq->client;
info.locked = 1;
if (name)
strncpy(info.name, name, sizeof(info.name) - 1);
if (ioctl(seq->fd, SND_SEQ_IOCTL_CREATE_QUEUE, &info) < 0)
return -errno;
return info.queue;
}
int snd_seq_alloc_queue(snd_seq_t *seq)
{
return snd_seq_alloc_named_queue(seq, NULL);
}
int snd_seq_free_queue(snd_seq_t *seq, int q)
{
int err;
snd_seq_queue_owner_t owner;
snd_seq_queue_info_t info;
if (!seq)
return -EINVAL;
if ((err = snd_seq_get_queue_owner(seq, q, &owner))<0)
return err;
if (owner.locked && owner.owner == seq->client) {
owner.locked = 0;
owner.owner = -1;
if ((err = snd_seq_set_queue_owner(seq, q, &owner))<0)
return err;
}
memset(&info, 0, sizeof(info));
info.queue = q;
if (ioctl(seq->fd, SND_SEQ_IOCTL_DELETE_QUEUE, &info) < 0)
return -errno;
return 0;
}
int snd_seq_get_queue_info(snd_seq_t *seq, int q, snd_seq_queue_info_t *info)
{
if (!seq || !info)
return -EINVAL;
info->queue = q;
if (ioctl(seq->fd, SND_SEQ_IOCTL_GET_QUEUE_INFO, info) < 0)
return -errno;
return 0;
}
int snd_seq_set_queue_info(snd_seq_t *seq, int q, snd_seq_queue_info_t *info)
{
if (!seq || !info)
return -EINVAL;
info->queue = q;
if (ioctl(seq->fd, SND_SEQ_IOCTL_SET_QUEUE_INFO, info) < 0)
return -errno;
return 0;
}
int snd_seq_get_named_queue(snd_seq_t *seq, char *name)
{
snd_seq_queue_info_t info;
if (!seq)
return -EINVAL;
strncpy(info.name, name, sizeof(info.name));
if (ioctl(seq->fd, SND_SEQ_IOCTL_GET_NAMED_QUEUE, &info) < 0)
return -errno;
return info.queue;
}
snd_seq_event_t *snd_seq_create_event(void)
{
return (snd_seq_event_t *) calloc(1, sizeof(snd_seq_event_t));
@ -558,11 +586,13 @@ static int snd_seq_decode_event(char **buf, int *len, snd_seq_event_t *ev)
case SND_SEQ_EVENT_LENGTH_VARIABLE:
if (*len < ev->data.ext.len) {
*len = 0;
ev->flags &= ~SND_SEQ_EVENT_LENGTH_MASK; /* clear flag */
return -ENOENT;
}
if (ev->data.ext.len > 0) {
ev->data.ext.ptr = (char *) malloc(ev->data.ext.len);
if (!(ev->data.ext.ptr)) {
ev->flags &= ~SND_SEQ_EVENT_LENGTH_MASK; /* clear flag */
*buf += ev->data.ext.len;
*len -= ev->data.ext.len;
return -ENOENT;
@ -595,6 +625,8 @@ int snd_seq_event_input(snd_seq_t *seq, snd_seq_event_t **ev)
return -ENOMEM;
cell = snd_seq_input_cell_out(seq);
memcpy(*ev, &cell->ev, sizeof(snd_seq_event_t));
/* clear flag to avoid free copied data */
cell->ev.flags &= ~SND_SEQ_EVENT_LENGTH_MASK;
snd_seq_free_cell(cell);
return seq->cells;
}