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audio:add getlatency for virtio snd driver

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add getlatency in virtio snd driver

Signed-off-by: shipei <shipei@xiaomi.com>
This commit is contained in:
shipei
2023-10-09 11:31:27 +08:00
committed by Xiang Xiao
parent 50f21f93d4
commit 551b9b1626
1 changed files with 13 additions and 0 deletions
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drivers/virtio/virtio-snd.c
+13
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@@ -70,7 +70,9 @@ struct virtio_snd_buffer_s
struct virtio_snd_dev_s
{
struct audio_lowerhalf_s dev;
uint32_t cache_buffers;
uint32_t period_bytes;
uint32_t frame_size;
uint32_t index;
bool running;
FAR void *priv;
@@ -333,6 +335,7 @@ static void virtio_snd_pcm_notify_cb(FAR struct virtqueue *vq)
for (; ; )
{
FAR struct virtio_snd_buffer_s *buf;
FAR struct virtio_snd_dev_s *sdev;
buf = virtqueue_get_buffer(vq, NULL, NULL);
if (buf == NULL)
{
@@ -346,6 +349,8 @@ static void virtio_snd_pcm_notify_cb(FAR struct virtqueue *vq)
buf->dev->upper(buf->dev->priv, AUDIO_CALLBACK_DEQUEUE,
&buf->apb, OK);
#endif
sdev = (FAR struct virtio_snd_dev_s *)buf->dev;
sdev->cache_buffers--;
}
}
@@ -401,6 +406,7 @@ static int virtio_snd_send_pcm(FAR struct virtio_snd_dev_s *sdev,
}
virtqueue_kick(vq);
sdev->cache_buffers++;
return OK;
}
@@ -736,6 +742,7 @@ static int virtio_snd_configure(FAR struct audio_lowerhalf_s *dev,
rate = caps->ac_controls.hw[0] | (caps->ac_controls.b[3] << 16);
bps = caps->ac_controls.b[2];
ch = caps->ac_channels;
sdev->frame_size = ch * bps / 8;
sdev->period_bytes =
virtio_snd_get_period_bytes(rate, ch, bps,
CONFIG_DRIVERS_VIRTIO_SOUND_PERIOD_TIME);
@@ -980,6 +987,7 @@ static int virtio_snd_ioctl(FAR struct audio_lowerhalf_s *dev,
{
FAR struct virtio_snd_dev_s *sdev = (FAR struct virtio_snd_dev_s *)dev;
FAR struct ap_buffer_info_s *bufinfo;
FAR long *latency = (FAR long *)arg;
switch (cmd)
{
@@ -989,6 +997,11 @@ static int virtio_snd_ioctl(FAR struct audio_lowerhalf_s *dev,
bufinfo->buffer_size = sdev->period_bytes;
break;
case AUDIOIOC_GETLATENCY:
*latency = sdev->cache_buffers * sdev->period_bytes /
sdev->frame_size;
break;
default:
return -ENOTTY;
}