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The stream linking problem for pcm_multi.c should be fixed now

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- extended link_fd callback
- added snd_pcm_generic_link2()
- added _snd_pcm_link_descriptors()
This commit is contained in:
Jaroslav Kysela 2005-01-20 18:37:13 +00:00
parent 6cac58179b
commit a5831c7300
6 changed files with 124 additions and 17 deletions
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33
src/pcm/pcm_hw.c
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@ -656,25 +656,40 @@ static int snd_pcm_hw_resume(snd_pcm_t *pcm)
return 0;
}
static int snd_pcm_hw_link_fd(snd_pcm_t *pcm)
static int snd_pcm_hw_link_fd(snd_pcm_t *pcm, int *fds, int count, int (**failed)(snd_pcm_t *, int))
{
snd_pcm_hw_t *hw = pcm->private_data;
return hw->fd;
if (count < 1)
return -EINVAL;
*failed = NULL;
fds[0] = hw->fd;
return 1;
}
static int snd_pcm_hw_link(snd_pcm_t *pcm1, snd_pcm_t *pcm2)
{
snd_pcm_hw_t *hw = pcm1->private_data;
int fd2 = _snd_pcm_link_descriptor(pcm2);
int fds[16];
int (*failed)(snd_pcm_t *, int) = NULL;
int count = _snd_pcm_link_descriptors(pcm2, fds, 16, &failed);
int i, err = 0;
if (fd2 < 0)
return -ENOSYS;
if (ioctl(hw->fd, SNDRV_PCM_IOCTL_LINK, fd2) < 0) {
SYSMSG("SNDRV_PCM_IOCTL_LINK failed");
return -errno;
if (count < 0)
return count;
for (i = 0; i < count; i++) {
if (fds[i] < 0)
return 0;
if (ioctl(hw->fd, SNDRV_PCM_IOCTL_LINK, fds[i]) < 0) {
if (failed != NULL) {
err = failed(pcm2, fds[i]);
} else {
SYSMSG("SNDRV_PCM_IOCTL_LINK failed");
err = -errno;
}
}
}
return 0;
return err;
}
static int snd_pcm_hw_unlink(snd_pcm_t *pcm)