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Removed ptrs from status. Some cleaning for alsa-lib

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This commit is contained in:
Abramo Bagnara 2000-10-05 10:26:07 +00:00
parent 841c8e2909
commit b95bc05d81
5 changed files with 44 additions and 89 deletions
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63
src/pcm/pcm_mmap.c
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@ -86,60 +86,6 @@ size_t snd_pcm_mmap_hw_offset(snd_pcm_t *pcm)
return pcm->mmap_status->hw_ptr % pcm->setup.buffer_size;
}
int snd_pcm_mmap_state(snd_pcm_t *pcm)
{
assert(pcm);
assert(pcm->mmap_status);
return pcm->mmap_status->state;
}
ssize_t snd_pcm_mmap_hw_ptr(snd_pcm_t *pcm)
{
assert(pcm);
assert(pcm->mmap_status);
return pcm->mmap_status->hw_ptr;
}
ssize_t snd_pcm_mmap_appl_ptr(snd_pcm_t *pcm, off_t offset)
{
ssize_t appl_ptr;
assert(pcm);
assert(pcm->mmap_status && pcm->mmap_control);
assert(offset == 0 || pcm->type == SND_PCM_TYPE_HW);
appl_ptr = pcm->mmap_control->appl_ptr;
if (offset == 0)
return appl_ptr;
switch (pcm->mmap_status->state) {
case SND_PCM_STATE_RUNNING:
if (pcm->setup.xrun_mode == SND_PCM_XRUN_ASAP)
snd_pcm_avail_update(pcm);
break;
case SND_PCM_STATE_READY:
case SND_PCM_STATE_NOTREADY:
return -EBADFD;
}
if (offset < 0) {
if (offset < -(ssize_t)pcm->setup.buffer_size)
offset = -(ssize_t)pcm->setup.buffer_size;
appl_ptr += offset;
if (appl_ptr < 0)
appl_ptr += pcm->setup.boundary;
} else {
size_t avail;
if (pcm->stream == SND_PCM_STREAM_PLAYBACK)
avail = snd_pcm_mmap_playback_avail(pcm);
else
avail = snd_pcm_mmap_capture_avail(pcm);
if ((size_t)offset > avail)
offset = avail;
appl_ptr += offset;
if ((size_t)appl_ptr >= pcm->setup.boundary)
appl_ptr -= pcm->setup.boundary;
}
pcm->mmap_control->appl_ptr = appl_ptr;
return appl_ptr;
}
void snd_pcm_mmap_appl_backward(snd_pcm_t *pcm, size_t frames)
{
ssize_t appl_ptr = pcm->mmap_control->appl_ptr;
@ -158,6 +104,15 @@ void snd_pcm_mmap_appl_forward(snd_pcm_t *pcm, size_t frames)
pcm->mmap_control->appl_ptr = appl_ptr;
}
void snd_pcm_mmap_hw_backward(snd_pcm_t *pcm, size_t frames)
{
ssize_t hw_ptr = pcm->mmap_status->hw_ptr;
hw_ptr -= frames;
if (hw_ptr < 0)
hw_ptr += pcm->setup.boundary;
pcm->mmap_status->hw_ptr = hw_ptr;
}
void snd_pcm_mmap_hw_forward(snd_pcm_t *pcm, size_t frames)
{
size_t hw_ptr = pcm->mmap_status->hw_ptr;