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pcm: null plugin - fix the avail count

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The automatic threshold start is not activated when the wrong avail
count is returned in the prepared state.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2014-06-13 10:46:54 +02:00
parent 084e7a91d8
commit 9c3086fb74
1 changed files with 23 additions and 16 deletions
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39
src/pcm/pcm_null.c
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@ -80,6 +80,20 @@ static int snd_pcm_null_info(snd_pcm_t *pcm, snd_pcm_info_t * info)
return 0;
}
static snd_pcm_sframes_t snd_pcm_null_avail_update(snd_pcm_t *pcm)
{
snd_pcm_null_t *null = pcm->private_data;
if (null->state == SND_PCM_STATE_PREPARED) {
/* it is required to return the correct avail count for */
/* the prepared stream, otherwise the start is not called */
if (pcm->stream == SND_PCM_STREAM_PLAYBACK)
return snd_pcm_mmap_playback_avail(pcm);
else
return snd_pcm_mmap_capture_avail(pcm);
}
return pcm->buffer_size;
}
static int snd_pcm_null_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
{
snd_pcm_null_t *null = pcm->private_data;
@ -87,8 +101,8 @@ static int snd_pcm_null_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
status->state = null->state;
status->trigger_tstamp = null->trigger_tstamp;
gettimestamp(&status->tstamp, pcm->monotonic);
status->avail = pcm->buffer_size;
status->avail_max = status->avail;
status->avail = snd_pcm_null_avail_update(pcm);
status->avail_max = pcm->buffer_size;
return 0;
}
@ -109,15 +123,6 @@ static int snd_pcm_null_delay(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_sframes_t
return 0;
}
static int snd_pcm_null_prepare(snd_pcm_t *pcm)
{
snd_pcm_null_t *null = pcm->private_data;
null->state = SND_PCM_STATE_PREPARED;
*pcm->appl.ptr = 0;
*pcm->hw.ptr = 0;
return 0;
}
static int snd_pcm_null_reset(snd_pcm_t *pcm)
{
*pcm->appl.ptr = 0;
@ -125,6 +130,13 @@ static int snd_pcm_null_reset(snd_pcm_t *pcm)
return 0;
}
static int snd_pcm_null_prepare(snd_pcm_t *pcm)
{
snd_pcm_null_t *null = pcm->private_data;
null->state = SND_PCM_STATE_PREPARED;
return snd_pcm_null_reset(pcm);
}
static int snd_pcm_null_start(snd_pcm_t *pcm)
{
snd_pcm_null_t *null = pcm->private_data;
@ -251,11 +263,6 @@ static snd_pcm_sframes_t snd_pcm_null_mmap_commit(snd_pcm_t *pcm,
return snd_pcm_null_forward(pcm, size);
}
static snd_pcm_sframes_t snd_pcm_null_avail_update(snd_pcm_t *pcm)
{
return pcm->buffer_size;
}
static int snd_pcm_null_hw_refine(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params)
{
int err = snd_pcm_hw_refine_soft(pcm, params);