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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2012-10-22 16:42:14 -0500
committerTakashi Iwai <tiwai@suse.de>2012-10-23 16:13:41 +0200
commit0e8014d772a7639f48d234b23dc4ce97335cce7f (patch)
treedc2be9b0067a1eb896474e8dfa1b0b2d88d14e93 /include/sound
parent86a778a78d06cdc8c3994837cd963c146acfba6a (diff)
ALSA: core: keep track of boundary wrap-around
Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level 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 6268a4192d5c..28fd9f95f9ba 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -281,6 +281,7 @@ struct snd_pcm_runtime {
unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */
snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
+ u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */
/* -- HW params -- */
snd_pcm_access_t access; /* access mode */