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authorRobert Rosengren <robert.rosengren@axis.com>2018-03-26 07:24:49 +0200
committerTakashi Iwai <tiwai@suse.de>2018-03-27 08:00:28 +0200
commit306a4f3ca7f3c7dfa473ebd19d66e40e59d99734 (patch)
treec275ecc8324f5221d215670d49b8d950a15a4f94 /sound/drivers
parent568fa7e087ef98bc85b5aa31ea7c9252c1305c1f (diff)
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ALSA: aloop: Mark paused device as inactive
Show paused ALSA aloop device as inactive, i.e. the control "PCM Slave Active" set as false. Notification sent upon state change. This makes it possible for client capturing from aloop device to know if data is expected. Without it the client expects data even if playback is paused. Signed-off-by: Robert Rosengren <robert.rosengren@axis.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/drivers')
-rw-r--r--sound/drivers/aloop.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c
index 1063a4377502..58e349fc893f 100644
--- a/sound/drivers/aloop.c
+++ b/sound/drivers/aloop.c
@@ -296,6 +296,8 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
cable->pause |= stream;
loopback_timer_stop(dpcm);
spin_unlock(&cable->lock);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ loopback_active_notify(dpcm);
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
@@ -304,6 +306,8 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
cable->pause &= ~stream;
loopback_timer_start(dpcm);
spin_unlock(&cable->lock);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ loopback_active_notify(dpcm);
break;
default:
return -EINVAL;
@@ -892,9 +896,11 @@ static int loopback_active_get(struct snd_kcontrol *kcontrol,
[kcontrol->id.subdevice][kcontrol->id.device ^ 1];
unsigned int val = 0;
- if (cable != NULL)
- val = (cable->running & (1 << SNDRV_PCM_STREAM_PLAYBACK)) ?
- 1 : 0;
+ if (cable != NULL) {
+ unsigned int running = cable->running ^ cable->pause;
+
+ val = (running & (1 << SNDRV_PCM_STREAM_PLAYBACK)) ? 1 : 0;
+ }
ucontrol->value.integer.value[0] = val;
return 0;
}