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ALSA: pcm: Unify read/write loop

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Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost
the same code to loop over samples.  For simplification, this patch
unifies both as the single helper, __snd_pcm_lib_xfer().

Other than that, there should be no functional change by this patch.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
2017-05-24 22:36:23 +02:00
parent 9f60063094
commit 5c7264cfbb
2 changed files with 56 additions and 151 deletions
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13
include/sound/pcm.h
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@ -1072,10 +1072,7 @@ void snd_pcm_set_sync(struct snd_pcm_substream *substream);
int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
unsigned int cmd, void *arg);
void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
snd_pcm_sframes_t __snd_pcm_lib_write(struct snd_pcm_substream *substream,
void *buf, bool interleaved,
snd_pcm_uframes_t frames);
snd_pcm_sframes_t __snd_pcm_lib_read(struct snd_pcm_substream *substream,
snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream,
void *buf, bool interleaved,
snd_pcm_uframes_t frames);
@ -1083,28 +1080,28 @@ static inline snd_pcm_sframes_t
snd_pcm_lib_write(struct snd_pcm_substream *substream,
const void __user *buf, snd_pcm_uframes_t frames)
{
return __snd_pcm_lib_write(substream, (void *)buf, true, frames);
return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames);
}
static inline snd_pcm_sframes_t
snd_pcm_lib_read(struct snd_pcm_substream *substream,
void __user *buf, snd_pcm_uframes_t frames)
{
return __snd_pcm_lib_read(substream, (void *)buf, true, frames);
return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames);
}
static inline snd_pcm_sframes_t
snd_pcm_lib_writev(struct snd_pcm_substream *substream,
void __user **bufs, snd_pcm_uframes_t frames)
{
return __snd_pcm_lib_write(substream, (void *)bufs, false, frames);
return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames);
}
static inline snd_pcm_sframes_t
snd_pcm_lib_readv(struct snd_pcm_substream *substream,
void __user **bufs, snd_pcm_uframes_t frames)
{
return __snd_pcm_lib_read(substream, (void *)bufs, false, frames);
return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames);
}
int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);