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videolan
vlc
Commits
89d23df7
Commit
89d23df7
authored
Apr 02, 2012
by
Rémi Denis-Courmont
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ALSA: correct S/PDIF start timing (fixes #6565)
This is completely untested, but it seems logical.
parent
d521b25d
Changes
1
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20 additions
and
12 deletions
+20
-12
modules/audio_output/alsa.c
modules/audio_output/alsa.c
+20
-12
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modules/audio_output/alsa.c
View file @
89d23df7
...
...
@@ -580,22 +580,30 @@ static void Play (audio_output_t *aout, block_t *block)
if
(
state
!=
SND_PCM_STATE_RUNNING
)
{
delay
=
block
->
i_pts
-
(
mdate
()
+
delay
);
if
(
delay
>
0
&&
aout
->
format
.
i_format
!=
VLC_CODEC_SPDIFL
)
if
(
delay
>
0
)
{
frames
=
(
delay
*
aout
->
format
.
i_rate
)
/
CLOCK_FREQ
;
msg_Dbg
(
aout
,
"prepending %ld zeroes"
,
frames
);
void
*
pad
=
calloc
(
frames
,
aout
->
format
.
i_bytes_per_frame
);
if
(
likely
(
pad
!=
NULL
))
if
(
aout
->
format
.
i_format
!=
VLC_CODEC_SPDIFL
)
{
frames
=
(
delay
*
aout
->
format
.
i_rate
)
/
CLOCK_FREQ
;
msg_Dbg
(
aout
,
"prepending %ld zeroes"
,
frames
);
void
*
z
=
calloc
(
frames
,
aout
->
format
.
i_bytes_per_frame
);
if
(
likely
(
z
!=
NULL
))
{
snd_pcm_writei
(
pcm
,
z
,
frames
);
free
(
z
);
delay
=
0
;
}
}
/* Lame fallback if zero padding does not work */
if
(
delay
>
0
)
{
snd_pcm_writei
(
pcm
,
pad
,
frames
);
free
(
pad
);
delay
=
0
;
msg_Dbg
(
aout
,
"deferring start (%"
PRId64
" us)"
,
delay
);
msleep
(
delay
);
}
}
/* Lame fallback if zero padding does not work */
if
(
delay
>
0
)
mwait
(
block
->
i_pts
-
delay
);
else
msg_Dbg
(
aout
,
"starting late (%"
PRId64
" us)"
,
delay
);
}
else
aout_TimeReport
(
aout
,
block
->
i_pts
-
delay
);
...
...
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