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Better PCM mmap API. Fixed pcm_multi

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This commit is contained in:
Abramo Bagnara 2001-04-13 15:40:53 +00:00
parent c4f95f48c3
commit 6a3b962d06
16 changed files with 279 additions and 279 deletions
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31
src/pcm/pcm_file.c
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@ -268,26 +268,19 @@ static snd_pcm_sframes_t snd_pcm_file_readn(snd_pcm_t *pcm, void **bufs, snd_pcm
return n;
}
static snd_pcm_sframes_t snd_pcm_file_mmap_forward(snd_pcm_t *pcm, 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_mmap_offset(pcm);
snd_pcm_sframes_t n = snd_pcm_mmap_forward(file->slave, size);
snd_pcm_uframes_t xfer = 0;
if (n <= 0)
return n;
while (xfer < (snd_pcm_uframes_t)n) {
snd_pcm_uframes_t frames = n - xfer;
snd_pcm_uframes_t cont = pcm->buffer_size - ofs;
if (frames > cont)
frames = cont;
snd_pcm_file_add_frames(pcm, snd_pcm_mmap_areas(file->slave), ofs, frames);
ofs += frames;
if (ofs == pcm->buffer_size)
ofs = 0;
xfer += frames;
}
return n;
snd_pcm_uframes_t ofs;
snd_pcm_uframes_t siz = size;
const snd_pcm_channel_area_t *areas;
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;
}
static snd_pcm_sframes_t snd_pcm_file_avail_update(snd_pcm_t *pcm)
@ -400,7 +393,7 @@ snd_pcm_fast_ops_t snd_pcm_file_fast_ops = {
readi: snd_pcm_file_readi,
readn: snd_pcm_file_readn,
avail_update: snd_pcm_file_avail_update,
mmap_forward: snd_pcm_file_mmap_forward,
mmap_commit: snd_pcm_file_mmap_commit,
};
int snd_pcm_file_open(snd_pcm_t **pcmp, const char *name, const char *fname, int fd, const char *fmt, snd_pcm_t *slave, int close_slave)