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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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121
src/pcm/pcm_rate.c
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@ -419,106 +419,39 @@ static int snd_pcm_rate_init(snd_pcm_t *pcm)
return 0;
}
static snd_pcm_sframes_t snd_pcm_rate_write_areas(snd_pcm_t *pcm,
const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t client_offset,
snd_pcm_uframes_t client_size,
snd_pcm_uframes_t *slave_sizep)
static snd_pcm_uframes_t
snd_pcm_rate_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_rate_t *rate = pcm->private_data;
snd_pcm_t *slave = rate->plug.slave;
snd_pcm_uframes_t client_xfer = 0;
snd_pcm_uframes_t slave_xfer = 0;
snd_pcm_sframes_t err = 0;
snd_pcm_uframes_t slave_size;
if (slave_sizep)
slave_size = *slave_sizep;
else
slave_size = INT_MAX;
assert(client_size > 0 && slave_size > 0);
while (client_xfer < client_size &&
slave_xfer < slave_size) {
snd_pcm_uframes_t src_frames, dst_frames;
src_frames = client_size - client_xfer;
dst_frames = snd_pcm_mmap_playback_xfer(slave, slave_size - slave_xfer);
src_frames = rate->func(snd_pcm_mmap_areas(slave), snd_pcm_mmap_offset(slave),
&dst_frames,
areas, client_offset, src_frames,
pcm->channels,
rate->get_idx, rate->put_idx,
rate->pitch, rate->states);
assert(src_frames || dst_frames);
if (dst_frames > 0) {
err = snd_pcm_mmap_forward(slave, dst_frames);
if (err < 0)
break;
assert((snd_pcm_uframes_t)err == dst_frames);
slave_xfer += dst_frames;
}
if (src_frames > 0) {
client_offset += src_frames;
client_xfer += src_frames;
snd_pcm_mmap_hw_forward(pcm, src_frames);
}
}
if (client_xfer > 0 || slave_xfer > 0) {
if (slave_sizep)
*slave_sizep = slave_xfer;
return client_xfer;
}
return err;
return rate->func(slave_areas, slave_offset, slave_sizep,
areas, offset, size,
pcm->channels,
rate->get_idx, rate->put_idx,
rate->pitch, rate->states);
}
static snd_pcm_sframes_t snd_pcm_rate_read_areas(snd_pcm_t *pcm,
const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t client_offset,
snd_pcm_uframes_t client_size,
snd_pcm_uframes_t *slave_sizep)
static snd_pcm_uframes_t
snd_pcm_rate_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_rate_t *rate = pcm->private_data;
snd_pcm_t *slave = rate->plug.slave;
snd_pcm_uframes_t client_xfer = 0;
snd_pcm_uframes_t slave_xfer = 0;
snd_pcm_sframes_t err = 0;
snd_pcm_uframes_t slave_size;
if (slave_sizep)
slave_size = *slave_sizep;
else
slave_size = INT_MAX;
assert(client_size > 0 && slave_size > 0);
while (client_xfer < client_size &&
slave_xfer < slave_size) {
snd_pcm_uframes_t src_frames, dst_frames;
dst_frames = client_size - client_xfer;
src_frames = snd_pcm_mmap_capture_xfer(slave, slave_size - slave_xfer);
src_frames = rate->func(areas, client_offset, &dst_frames,
snd_pcm_mmap_areas(slave), snd_pcm_mmap_offset(slave),
src_frames,
pcm->channels,
rate->get_idx, rate->put_idx,
rate->pitch, rate->states);
assert(src_frames || dst_frames);
if (src_frames > 0) {
err = snd_pcm_mmap_forward(slave, src_frames);
if (err < 0)
break;
assert((snd_pcm_uframes_t)err == src_frames);
slave_xfer += src_frames;
}
if (dst_frames > 0) {
client_offset += dst_frames;
client_xfer += dst_frames;
snd_pcm_mmap_hw_forward(pcm, dst_frames);
}
}
if (client_xfer > 0 || slave_xfer > 0) {
if (slave_sizep)
*slave_sizep = slave_xfer;
return client_xfer;
}
return err;
*slave_sizep = rate->func(areas, offset, &size,
slave_areas, slave_offset, *slave_sizep,
pcm->channels,
rate->get_idx, rate->put_idx,
rate->pitch, rate->states);
return size;
}
snd_pcm_sframes_t snd_pcm_rate_client_frames(snd_pcm_t *pcm, snd_pcm_sframes_t frames)