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Cleaned the mmap_commit implementations in plugins.

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Added undo callbacks for snd_pcm_plugin based plugins.
  - helpers when mmap_commit proceed only a partial transfer
Fixes to avail_update implementation in pcm_hw.c.
This commit is contained in:
Jaroslav Kysela 2002-02-21 15:01:34 +00:00
parent 9b0eebbcb7
commit e128bf856e
22 changed files with 260 additions and 120 deletions
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26
src/pcm/pcm_multi.c
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@ -496,8 +496,14 @@ static snd_pcm_sframes_t snd_pcm_multi_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t
for (i = 0; i < multi->slaves_count; ++i) {
snd_pcm_t *slave_i = multi->slaves[i].pcm;
snd_pcm_uframes_t f = pos[i] - frames;
if (f > 0)
snd_pcm_mmap_commit(slave_i, snd_pcm_mmap_offset(slave_i), f);
snd_pcm_sframes_t result;
if (f > 0) {
result = snd_pcm_mmap_commit(slave_i, snd_pcm_mmap_offset(slave_i), f);
if (result < 0)
return result;
if ((snd_pcm_uframes_t)result != f)
return -EIO;
}
}
return frames;
}
@ -517,20 +523,22 @@ static int snd_pcm_multi_resume(snd_pcm_t *pcm)
return err;
}
static int snd_pcm_multi_mmap_commit(snd_pcm_t *pcm,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size)
static snd_pcm_sframes_t snd_pcm_multi_mmap_commit(snd_pcm_t *pcm,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size)
{
snd_pcm_multi_t *multi = pcm->private_data;
snd_pcm_t *slave;
unsigned int i;
int err;
snd_pcm_sframes_t result;
for (i = 0; i < multi->slaves_count; ++i) {
slave = multi->slaves[i].pcm;
err = snd_pcm_mmap_commit(slave, offset, size);
if (err < 0)
return err;
result = snd_pcm_mmap_commit(slave, offset, size);
if (result < 0)
return result;
if ((snd_pcm_uframes_t)result != size)
return -EIO;
}
return 0;
}