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Changed result of mmap_commit callback

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(follows description of snd_pcm_mmap_commit function).
This commit is contained in:
Jaroslav Kysela 2001-12-08 21:02:20 +00:00
parent 8ca451f0e1
commit 0917ba63b0
11 changed files with 57 additions and 53 deletions
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19
src/pcm/pcm_plugin.c
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@ -286,28 +286,30 @@ snd_pcm_sframes_t snd_pcm_plugin_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_ufra
snd_pcm_plugin_read_areas);
}
snd_pcm_sframes_t snd_pcm_plugin_mmap_commit(snd_pcm_t *pcm,
snd_pcm_uframes_t offset ATTRIBUTE_UNUSED,
snd_pcm_uframes_t size)
int snd_pcm_plugin_mmap_commit(snd_pcm_t *pcm,
snd_pcm_uframes_t offset ATTRIBUTE_UNUSED,
snd_pcm_uframes_t size)
{
snd_pcm_plugin_t *plugin = pcm->private_data;
snd_pcm_t *slave = plugin->slave;
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t xfer, hw_offset;
snd_pcm_uframes_t slave_size;
snd_pcm_sframes_t slave_size;
if (pcm->stream == SND_PCM_STREAM_CAPTURE) {
snd_atomic_write_begin(&plugin->watom);
snd_pcm_mmap_appl_forward(pcm, size);
snd_atomic_write_end(&plugin->watom);
return size;
return 0;
}
slave_size = snd_pcm_avail_update(slave);
if (slave_size <= 0)
if (slave_size < 0)
return slave_size;
if (slave_size == 0)
return -EIO;
areas = snd_pcm_mmap_areas(pcm);
hw_offset = snd_pcm_mmap_hw_offset(pcm);
xfer = 0;
while (size && slave_size) {
while (size > 0 && slave_size > 0) {
snd_pcm_uframes_t frames = size;
snd_pcm_uframes_t cont = pcm->buffer_size - hw_offset;
const snd_pcm_channel_area_t *slave_areas;
@ -331,7 +333,8 @@ snd_pcm_sframes_t snd_pcm_plugin_mmap_commit(snd_pcm_t *pcm,
size -= frames;
slave_size -= slave_frames;
}
return xfer;
assert(size == 0);
return 0;
}
snd_pcm_sframes_t snd_pcm_plugin_avail_update(snd_pcm_t *pcm)