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ALSA: pcm: Unify snd_pcm_delay() and snd_pcm_hwsync()

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Both snd_pcm_delay() and snd_pcm_hwsync() do the almost same thing.
The only difference is that the former calculate the delay, so unify
them as a code cleanup, and treat NULL delay argument only for hwsync
operation.

Also, the patch does a slight code refactoring in snd_pcm_delay().
The initialization of the delay value is done in the caller side now.

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20211014145323.26506-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2021-10-14 16:53:23 +02:00
parent b96681bd58
commit c18c496603
1 changed files with 8 additions and 16 deletions
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24
sound/core/pcm_native.c
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@ -2932,32 +2932,24 @@ static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream,
return ret;
}
static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
{
int err;
snd_pcm_stream_lock_irq(substream);
err = do_pcm_hwsync(substream);
snd_pcm_stream_unlock_irq(substream);
return err;
}
static int snd_pcm_delay(struct snd_pcm_substream *substream,
snd_pcm_sframes_t *delay)
{
int err;
snd_pcm_sframes_t n = 0;
snd_pcm_stream_lock_irq(substream);
err = do_pcm_hwsync(substream);
if (!err)
n = snd_pcm_calc_delay(substream);
if (delay && !err)
*delay = snd_pcm_calc_delay(substream);
snd_pcm_stream_unlock_irq(substream);
if (!err)
*delay = n;
return err;
}
static inline int snd_pcm_hwsync(struct snd_pcm_substream *substream)
{
return snd_pcm_delay(substream, NULL);
}
static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
struct snd_pcm_sync_ptr __user *_sync_ptr)
{
@ -3275,7 +3267,7 @@ static int snd_pcm_common_ioctl(struct file *file,
return snd_pcm_hwsync(substream);
case SNDRV_PCM_IOCTL_DELAY:
{
snd_pcm_sframes_t delay;
snd_pcm_sframes_t delay = 0;
snd_pcm_sframes_t __user *res = arg;
int err;