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improved stream linking and plugin code cleanups

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- added link/unlink/link_fd fast_ops callbacks
- moved code from snd_pcm_link to pcm_hw.c
- moved "empty" routines pointing to slave to pcm_generic.c
- introduced snd_pcm_generic_t
This commit is contained in:
Jaroslav Kysela 2005-01-20 15:07:51 +00:00
parent 9501520606
commit 836987aa99
25 changed files with 767 additions and 957 deletions
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35
src/pcm/pcm_hw.c
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@ -656,6 +656,38 @@ static int snd_pcm_hw_resume(snd_pcm_t *pcm)
return 0;
}
static int snd_pcm_hw_link_fd(snd_pcm_t *pcm)
{
snd_pcm_hw_t *hw = pcm->private_data;
return hw->fd;
}
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);
if (fd2 < 0)
return -ENOSYS;
if (ioctl(hw->fd, SNDRV_PCM_IOCTL_LINK, fd2) < 0) {
SYSMSG("SNDRV_PCM_IOCTL_LINK failed");
return -errno;
}
return 0;
}
static int snd_pcm_hw_unlink(snd_pcm_t *pcm)
{
snd_pcm_hw_t *hw = pcm->private_data;
if (ioctl(hw->fd, SNDRV_PCM_IOCTL_UNLINK) < 0) {
SYSMSG("SNDRV_PCM_IOCTL_UNLINK failed");
return -errno;
}
return 0;
}
static snd_pcm_sframes_t snd_pcm_hw_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size)
{
int err;
@ -970,6 +1002,9 @@ static snd_pcm_fast_ops_t snd_pcm_hw_fast_ops = {
.forward = snd_pcm_hw_forward,
.resume = snd_pcm_hw_resume,
.poll_ask = NULL,
.link_fd = snd_pcm_hw_link_fd,
.link = snd_pcm_hw_link,
.unlink = snd_pcm_hw_unlink,
.writei = snd_pcm_hw_writei,
.writen = snd_pcm_hw_writen,
.readi = snd_pcm_hw_readi,