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Improved plugin code (simpler, faster and multithread ready)

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This commit is contained in:
Abramo Bagnara 2001-02-27 13:42:12 +00:00
parent afde2cfab2
commit 3830b168ef
13 changed files with 407 additions and 564 deletions
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90
src/pcm/pcm_adpcm.c
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@ -452,74 +452,44 @@ static int snd_pcm_adpcm_init(snd_pcm_t *pcm)
return 0;
}
static snd_pcm_sframes_t snd_pcm_adpcm_write_areas(snd_pcm_t *pcm,
const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size,
snd_pcm_uframes_t *slave_sizep)
static snd_pcm_uframes_t
snd_pcm_adpcm_write_areas(snd_pcm_t *pcm,
const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size,
const snd_pcm_channel_area_t *slave_areas,
snd_pcm_uframes_t slave_offset,
snd_pcm_uframes_t *slave_sizep)
{
snd_pcm_adpcm_t *adpcm = pcm->private_data;
snd_pcm_t *slave = adpcm->plug.slave;
snd_pcm_uframes_t xfer = 0;
snd_pcm_sframes_t err = 0;
if (slave_sizep && *slave_sizep < size)
if (size > *slave_sizep)
size = *slave_sizep;
assert(size > 0);
while (xfer < size) {
snd_pcm_uframes_t frames = snd_pcm_mmap_playback_xfer(slave, size - xfer);
adpcm->func(snd_pcm_mmap_areas(slave), snd_pcm_mmap_offset(slave),
areas, offset,
pcm->channels, frames,
adpcm->getput_idx, adpcm->states);
err = snd_pcm_mmap_forward(slave, frames);
if (err < 0)
break;
assert((snd_pcm_uframes_t)err == frames);
offset += err;
xfer += err;
snd_pcm_mmap_hw_forward(pcm, err);
}
if (xfer > 0) {
if (slave_sizep)
*slave_sizep = xfer;
return xfer;
}
return err;
adpcm->func(slave_areas, slave_offset,
areas, offset,
pcm->channels, size,
adpcm->getput_idx, adpcm->states);
*slave_sizep = size;
return size;
}
static snd_pcm_sframes_t snd_pcm_adpcm_read_areas(snd_pcm_t *pcm,
const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size,
snd_pcm_uframes_t *slave_sizep)
static snd_pcm_uframes_t
snd_pcm_adpcm_read_areas(snd_pcm_t *pcm,
const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size,
const snd_pcm_channel_area_t *slave_areas,
snd_pcm_uframes_t slave_offset,
snd_pcm_uframes_t *slave_sizep)
{
snd_pcm_adpcm_t *adpcm = pcm->private_data;
snd_pcm_t *slave = adpcm->plug.slave;
snd_pcm_uframes_t xfer = 0;
snd_pcm_sframes_t err = 0;
if (slave_sizep && *slave_sizep < size)
if (size > *slave_sizep)
size = *slave_sizep;
assert(size > 0);
while (xfer < size) {
snd_pcm_uframes_t frames = snd_pcm_mmap_capture_xfer(slave, size - xfer);
adpcm->func(areas, offset,
snd_pcm_mmap_areas(slave), snd_pcm_mmap_offset(slave),
pcm->channels, frames,
adpcm->getput_idx, adpcm->states);
err = snd_pcm_mmap_forward(slave, frames);
if (err < 0)
break;
assert((snd_pcm_uframes_t)err == frames);
offset += err;
xfer += err;
snd_pcm_mmap_hw_forward(pcm, err);
}
if (xfer > 0) {
if (slave_sizep)
*slave_sizep = xfer;
return xfer;
}
return err;
adpcm->func(areas, offset,
slave_areas, slave_offset,
pcm->channels, size,
adpcm->getput_idx, adpcm->states);
*slave_sizep = size;
return size;
}
static void snd_pcm_adpcm_dump(snd_pcm_t *pcm, snd_output_t *out)