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arch/sim : Audio driver add AUDIOIOC_GETLATENCY ioctl

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add AUDIOIOC_GETLATENCY definition, and add reference code in sim alsa.

Signed-off-by: libei1 <libei1@xiaomi.com>
This commit is contained in:
libei1 2023-06-15 20:14:50 +08:00 committed by Xiang Xiao
parent cbbeec3183
commit 63774125d9
2 changed files with 33 additions and 0 deletions
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32
arch/sim/src/sim/posix/sim_alsa.c
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@ -600,6 +600,38 @@ static int sim_audio_ioctl(struct audio_lowerhalf_s *dev, int cmd,
audinfo("%s , arg: %s\n", __func__, (char *)arg);
} break;
case AUDIOIOC_GETLATENCY:
{
long *latency = (long *)arg;
long remain = 0;
dq_entry_t *cur;
if (!priv->pcm)
{
ret = -ENXIO;
break;
}
ret = snd_pcm_delay(priv->pcm, latency);
if (ret < 0)
{
return ret;
}
else
{
remain = priv->aux->nbytes - priv->aux->curbyte;
for (cur = dq_peek(&priv->pendq); cur; cur = dq_next(cur))
{
struct ap_buffer_s *apb = (struct ap_buffer_s *)cur;
remain += apb->nbytes - apb->curbyte;
}
*latency += remain / priv->frame_size;
}
}
break;
default:
ret = -ENOTTY;
break;

1
include/nuttx/audio/audio.h
View file

@ -112,6 +112,7 @@
#define AUDIOIOC_HWRESET _AUDIOIOC(16)
#define AUDIOIOC_SETBUFFERINFO _AUDIOIOC(17)
#define AUDIOIOC_SETPARAMTER _AUDIOIOC(18)
#define AUDIOIOC_GETLATENCY _AUDIOIOC(19)
/* Audio Device Types *******************************************************/