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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2015-02-07 00:55:51 +0300
committerTakashi Iwai <tiwai@suse.de>2015-02-09 18:01:53 +0300
commit2b79d7a6bf341ebeffb85fc2b3577d0cfa810c49 (patch)
tree164985dd74d92ed3563be5d52f656e1d7dd9444f /include/sound
parent0d59b814353d397ff5d00ac33acd536030252a98 (diff)
downloadlinux-2b79d7a6bf341ebeffb85fc2b3577d0cfa810c49.tar.xz
ALSA: pcm: allow for trigger_tstamp snapshot in .trigger
Don't use generic snapshot of trigger_tstamp if low-level driver or hardware can get a more precise value for better audio/system time synchronization. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/pcm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 07299b295233..c0ddb7e69c28 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -285,6 +285,7 @@ struct snd_pcm_runtime {
/* -- Status -- */
struct snd_pcm_substream *trigger_master;
struct timespec trigger_tstamp; /* trigger timestamp */
+ bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */
int overrange;
snd_pcm_uframes_t avail_max;
snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */