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authorTakashi Iwai <tiwai@suse.de>2008-10-13 03:07:14 +0200
committerTakashi Iwai <tiwai@suse.de>2009-05-05 14:47:21 +0200
commit4bbe1ddf89a5ba3ec30fe5980912d8bda3a3cbb2 (patch)
treec57b1b83a23bd80535ea5b9220d07a3ab09df955 /include/sound/pcm.h
parent091438dd5668396328a3419abcbc6591159eb8d1 (diff)
downloadop-kernel-dev-4bbe1ddf89a5ba3ec30fe5980912d8bda3a3cbb2.zip
op-kernel-dev-4bbe1ddf89a5ba3ec30fe5980912d8bda3a3cbb2.tar.gz
ALSA: Add extra delay count in PCM
Added runtime->delay field to adjust the delayed samples for snd_pcm_delay(). Typically a hardware FIFO length is stored in this field, so that the extra delay between hwptr and applptr can be computed. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound/pcm.h')
-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 c172968..267effd 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -270,6 +270,7 @@ struct snd_pcm_runtime {
snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
+ snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
/* -- HW params -- */
snd_pcm_access_t access; /* access mode */
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