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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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18
src/pcm/pcm_file.c
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@ -86,7 +86,8 @@ static void snd_pcm_file_write_bytes(snd_pcm_t *pcm, size_t bytes)
static void snd_pcm_file_add_frames(snd_pcm_t *pcm,
const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t offset, snd_pcm_uframes_t frames)
snd_pcm_uframes_t offset,
snd_pcm_uframes_t frames)
{
snd_pcm_file_t *file = pcm->private_data;
while (frames > 0) {
@ -290,19 +291,22 @@ static snd_pcm_sframes_t snd_pcm_file_readn(snd_pcm_t *pcm, void **bufs, snd_pcm
return n;
}
static int snd_pcm_file_mmap_commit(snd_pcm_t *pcm,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size)
static snd_pcm_sframes_t snd_pcm_file_mmap_commit(snd_pcm_t *pcm,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size)
{
snd_pcm_file_t *file = pcm->private_data;
snd_pcm_uframes_t ofs;
snd_pcm_uframes_t siz = size;
const snd_pcm_channel_area_t *areas;
snd_pcm_sframes_t result;
snd_pcm_mmap_begin(file->slave, &areas, &ofs, &siz);
assert(ofs == offset && siz == size);
snd_pcm_mmap_commit(file->slave, ofs, siz);
snd_pcm_file_add_frames(pcm, areas, ofs, siz);
return 0;
result = snd_pcm_mmap_commit(file->slave, ofs, siz);
if (result > 0)
snd_pcm_file_add_frames(pcm, areas, ofs, result);
return result;
}
static snd_pcm_sframes_t snd_pcm_file_avail_update(snd_pcm_t *pcm)