ALSA: pcm: Unify delay calculation in snd_pcm_status() and snd_pcm_delay()

Yet another slight code cleanup: there are two places where
calculating the PCM delay, and they can be unified in a single
helper.  It reduces the multiple open codes.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index eddb0cd6d1eb6290ab42dc80b559801224e9b814..7585444352df80a5cdf4686d278d43986cf487a3 100644 (file)
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -857,6 +857,18 @@ static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
        return err;
 }
 
+static inline snd_pcm_uframes_t
+snd_pcm_calc_delay(struct snd_pcm_substream *substream)
+{
+       snd_pcm_uframes_t delay;
+
+       if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+               delay = snd_pcm_playback_hw_avail(substream->runtime);
+       else
+               delay = snd_pcm_capture_avail(substream->runtime);
+       return delay + substream->runtime->delay;
+}
+
 int snd_pcm_status(struct snd_pcm_substream *substream,
                   struct snd_pcm_status *status)
 {
@@ -909,19 +921,8 @@ int snd_pcm_status(struct snd_pcm_substream *substream,
        status->appl_ptr = runtime->control->appl_ptr;
        status->hw_ptr = runtime->status->hw_ptr;
        status->avail = snd_pcm_avail(substream);
-       if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-               if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
-                   runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
-                       status->delay = runtime->buffer_size - status->avail;
-                       status->delay += runtime->delay;
-               } else
-                       status->delay = 0;
-       } else {
-               if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
-                       status->delay = status->avail + runtime->delay;
-               else
-                       status->delay = 0;
-       }
+       status->delay = snd_pcm_running(substream) ?
+               snd_pcm_calc_delay(substream) : 0;
        status->avail_max = runtime->avail_max;
        status->overrange = runtime->overrange;
        runtime->avail_max = 0;
@@ -2655,19 +2656,13 @@ static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
                
 static snd_pcm_sframes_t snd_pcm_delay(struct snd_pcm_substream *substream)
 {
-       struct snd_pcm_runtime *runtime = substream->runtime;
        int err;
        snd_pcm_sframes_t n = 0;
 
        snd_pcm_stream_lock_irq(substream);
        err = do_pcm_hwsync(substream);
-       if (!err) {
-               if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-                       n = snd_pcm_playback_hw_avail(runtime);
-               else
-                       n = snd_pcm_capture_avail(runtime);
-               n += runtime->delay;
-       }
+       if (!err)
+               n = snd_pcm_calc_delay(substream);
        snd_pcm_stream_unlock_irq(substream);
        return err < 0 ? err : n;
 }