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Added functions:

Browse source 
snd_ctl_rawmidi_prefer_subdevice
	snd_rawmidi_open_subdevice
Fixed functions:
	snd_pcm_hw_open - fixed prefer subdevice code
This commit is contained in:
Jaroslav Kysela 2000-10-30 12:15:18 +00:00
parent 8a625fd63b
commit 0e561770c6
10 changed files with 93 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

49
src/rawmidi/rawmidi.c
View file

@ -38,33 +38,69 @@ struct snd_rawmidi {
int mode;
};
int snd_rawmidi_open(snd_rawmidi_t **handle, int card, int device, int mode)
int snd_rawmidi_open_subdevice(snd_rawmidi_t **handle, int card, int device, int subdevice, int mode)
{
int fd, ver;
int fd, ver, ret;
int attempt = 0;
char filename[32];
snd_ctl_t *ctl;
snd_rawmidi_t *rmidi;
snd_rawmidi_info_t info;
*handle = NULL;
if (card < 0 || card >= SND_CARDS)
return -EINVAL;
if ((ret = snd_ctl_hw_open(&ctl, NULL, card)) < 0)
return ret;
sprintf(filename, SND_FILE_RAWMIDI, card, device);
__again:
if (attempt++ > 3) {
snd_ctl_close(ctl);
return -EBUSY;
}
ret = snd_ctl_rawmidi_prefer_subdevice(ctl, subdevice);
if (ret < 0) {
snd_ctl_close(ctl);
return ret;
}
if ((fd = open(filename, mode)) < 0) {
snd_card_load(card);
if ((fd = open(filename, mode)) < 0)
if ((fd = open(filename, mode)) < 0) {
snd_ctl_close(ctl);
return -errno;
}
}
if (ioctl(fd, SND_RAWMIDI_IOCTL_PVERSION, &ver) < 0) {
ret = -errno;
close(fd);
return -errno;
snd_ctl_close(ctl);
return ret;
}
if (SND_PROTOCOL_INCOMPATIBLE(ver, SND_RAWMIDI_VERSION_MAX)) {
close(fd);
snd_ctl_close(ctl);
return -SND_ERROR_INCOMPATIBLE_VERSION;
}
if (subdevice >= 0) {
memset(&info, 0, sizeof(info));
if (ioctl(fd, SND_RAWMIDI_IOCTL_INFO, &info) < 0) {
ret = -errno;
close(fd);
snd_ctl_close(ctl);
return ret;
}
if (info.subdevice != subdevice) {
close(fd);
goto __again;
}
}
rmidi = (snd_rawmidi_t *) calloc(1, sizeof(snd_rawmidi_t));
if (rmidi == NULL) {
close(fd);
snd_ctl_close(ctl);
return -ENOMEM;
}
rmidi->card = card;
@ -75,6 +111,11 @@ int snd_rawmidi_open(snd_rawmidi_t **handle, int card, int device, int mode)
return 0;
}
int snd_rawmidi_open(snd_rawmidi_t **handle, int card, int device, int mode)
{
return snd_rawmidi_open_subdevice(handle, card, device, -1, mode);
}
int snd_rawmidi_close(snd_rawmidi_t *rmidi)
{
int res;