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implemented snd_pcm_rewindable() and snd_pcm_forwardable(), removed can_rewind and can_forward

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This commit is contained in:
Jaroslav Kysela 2008-04-21 12:46:50 +02:00
parent 058dde8b7d
commit c88672d86f
17 changed files with 212 additions and 55 deletions
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26
src/pcm/pcm_dshare.c
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@ -410,15 +410,27 @@ static int snd_pcm_dshare_pause(snd_pcm_t *pcm ATTRIBUTE_UNUSED, int enable ATTR
return -EIO;
}
static snd_pcm_sframes_t snd_pcm_dshare_rewind(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_uframes_t frames ATTRIBUTE_UNUSED)
static snd_pcm_sframes_t snd_pcm_dshare_rewindable(snd_pcm_t *pcm)
{
#if 0
/* FIXME: substract samples from the mix ring buffer, too? */
return snd_pcm_mmap_playback_hw_avail(pcm);
}
static snd_pcm_sframes_t snd_pcm_dshare_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames)
{
snd_pcm_sframes_t avail;
avail = snd_pcm_mmap_playback_hw_avail(pcm);
if (avail < 0)
return 0;
if (frames > (snd_pcm_uframes_t)avail)
frames = avail;
snd_pcm_mmap_appl_backward(pcm, frames);
return frames;
#else
return -EIO;
#endif
}
static snd_pcm_sframes_t snd_pcm_dshare_forwardable(snd_pcm_t *pcm)
{
return snd_pcm_mmap_playback_avail(pcm);
}
static snd_pcm_sframes_t snd_pcm_dshare_forward(snd_pcm_t *pcm, snd_pcm_uframes_t frames)
@ -574,7 +586,9 @@ static snd_pcm_fast_ops_t snd_pcm_dshare_fast_ops = {
.drop = snd_pcm_dshare_drop,
.drain = snd_pcm_dshare_drain,
.pause = snd_pcm_dshare_pause,
.rewindable = snd_pcm_dshare_rewindable,
.rewind = snd_pcm_dshare_rewind,
.forwardable = snd_pcm_dshare_forwardable,
.forward = snd_pcm_dshare_forward,
.resume = snd_pcm_direct_resume,
.link = NULL,