ao_alsa: fix return value for volume operations with spdif

This AO pretended to support volume operations when in spdif passthrough
mode, but actually did nothing. This is wrong: at least the GET
operations must write their argument. Signal that volume is unsupported
instead.

This was probably a hack to prevent insertion of volume filters or so,
but it didn't work anyway, while recovering after failed volume filter
insertion does work, so this is not needed at all.

1 files changed, 1 insertions, 1 deletions

diff --git a/audio/out/ao_alsa.c b/audio/out/ao_alsa.c
index 08ddac75ea..d98bc861b8 100644
--- a/audio/out/ao_alsa.c
+++ b/audio/out/ao_alsa.c
@@ -100,7 +100,7 @@ static int control(struct ao *ao, enum aocontrol cmd, void *arg)
         float f_multi;
 
         if (AF_FORMAT_IS_IEC61937(ao->format))
-            return CONTROL_TRUE;
+            return CONTROL_FALSE;
 
         //allocate simple id
         snd_mixer_selem_id_alloca(&sid);