[alsa-devel] [PATCH alsa-lib] pcm: fix return value of snd_pcm_share_slave_avail

[Alexander E. Patrakov]

The return value was wrong for playback if slave->hw_ptr was near the
boundary and *pcm->appl.ptr was near zero. The wrong result was greater
than the boundary.

Signed-off-by: Alexander E. Patrakov <patrakov at gmail.com>
---
 src/pcm/pcm_share.c | 2 ++
 1 file changed, 2 insertions(+)

Only compile-tested, as I don't know how to setup the "share" pcm.

diff --git a/src/pcm/pcm_share.c b/src/pcm/pcm_share.c
index 9770544..c301c7a 100644
--- a/src/pcm/pcm_share.c
+++ b/src/pcm/pcm_share.c
@@ -128,6 +128,8 @@ static snd_pcm_uframes_t snd_pcm_share_slave_avail(snd_pcm_share_slave_t *slave)
 		avail += pcm->buffer_size;
 	if (avail < 0)
 		avail += pcm->boundary;
+	else if ((snd_pcm_uframes_t) avail >= pcm->boundary)
+		avail -= pcm->boundary;
 	return avail;
 }
 
-- 
2.1.0