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5de9e45f
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体验新版 GitCode,发现更多精彩内容 >>
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5de9e45f
编写于
10月 20, 2010
作者:
J
Jaroslav Kysela
浏览文件
操作
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电子邮件补丁
差异文件
ALSA: snd-aloop - add pause support
Signed-off-by:
N
Jaroslav Kysela
<
perex@perex.cz
>
上级
dd04bb12
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
22 addition
and
5 deletion
+22
-5
sound/drivers/aloop.c
sound/drivers/aloop.c
+22
-5
未找到文件。
sound/drivers/aloop.c
浏览文件 @
5de9e45f
...
...
@@ -77,6 +77,7 @@ struct loopback_cable {
/* flags */
unsigned
int
valid
;
unsigned
int
running
;
unsigned
int
pause
;
};
struct
loopback_setup
{
...
...
@@ -254,7 +255,7 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
struct
snd_pcm_runtime
*
runtime
=
substream
->
runtime
;
struct
loopback_pcm
*
dpcm
=
runtime
->
private_data
;
struct
loopback_cable
*
cable
=
dpcm
->
cable
;
int
err
;
int
err
,
stream
=
1
<<
substream
->
stream
;
switch
(
cmd
)
{
case
SNDRV_PCM_TRIGGER_START
:
...
...
@@ -264,7 +265,8 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
dpcm
->
last_jiffies
=
jiffies
;
dpcm
->
pcm_rate_shift
=
0
;
spin_lock
(
&
cable
->
lock
);
cable
->
running
|=
(
1
<<
substream
->
stream
);
cable
->
running
|=
stream
;
cable
->
pause
&=
~
stream
;
spin_unlock
(
&
cable
->
lock
);
loopback_timer_start
(
dpcm
);
if
(
substream
->
stream
==
SNDRV_PCM_STREAM_PLAYBACK
)
...
...
@@ -272,12 +274,26 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
break
;
case
SNDRV_PCM_TRIGGER_STOP
:
spin_lock
(
&
cable
->
lock
);
cable
->
running
&=
~
(
1
<<
substream
->
stream
);
cable
->
running
&=
~
stream
;
cable
->
pause
&=
~
stream
;
spin_unlock
(
&
cable
->
lock
);
loopback_timer_stop
(
dpcm
);
if
(
substream
->
stream
==
SNDRV_PCM_STREAM_PLAYBACK
)
loopback_active_notify
(
dpcm
);
break
;
case
SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
spin_lock
(
&
cable
->
lock
);
cable
->
pause
|=
stream
;
spin_unlock
(
&
cable
->
lock
);
loopback_timer_stop
(
dpcm
);
break
;
case
SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
spin_lock
(
&
cable
->
lock
);
dpcm
->
last_jiffies
=
jiffies
;
cable
->
pause
&=
~
stream
;
spin_unlock
(
&
cable
->
lock
);
loopback_timer_start
(
dpcm
);
break
;
default:
return
-
EINVAL
;
}
...
...
@@ -468,7 +484,7 @@ static unsigned int loopback_pos_update(struct loopback_cable *cable)
unsigned
int
running
;
spin_lock
(
&
cable
->
lock
);
running
=
cable
->
running
;
running
=
cable
->
running
^
cable
->
pause
;
if
(
running
&
(
1
<<
SNDRV_PCM_STREAM_PLAYBACK
))
{
delta_play
=
jiffies
-
dpcm_play
->
last_jiffies
;
dpcm_play
->
last_jiffies
+=
delta_play
;
...
...
@@ -532,7 +548,7 @@ static snd_pcm_uframes_t loopback_pointer(struct snd_pcm_substream *substream)
static
struct
snd_pcm_hardware
loopback_pcm_hardware
=
{
.
info
=
(
SNDRV_PCM_INFO_INTERLEAVED
|
SNDRV_PCM_INFO_MMAP
|
SNDRV_PCM_INFO_MMAP_VALID
),
SNDRV_PCM_INFO_MMAP_VALID
|
SNDRV_PCM_INFO_PAUSE
),
.
formats
=
(
SNDRV_PCM_FMTBIT_S16_LE
|
SNDRV_PCM_FMTBIT_S16_BE
|
SNDRV_PCM_FMTBIT_S32_LE
|
SNDRV_PCM_FMTBIT_S32_BE
|
SNDRV_PCM_FMTBIT_FLOAT_LE
|
SNDRV_PCM_FMTBIT_FLOAT_BE
),
...
...
@@ -1060,6 +1076,7 @@ static void print_substream_info(struct snd_info_buffer *buffer,
}
snd_iprintf
(
buffer
,
" valid: %u
\n
"
,
cable
->
valid
);
snd_iprintf
(
buffer
,
" running: %u
\n
"
,
cable
->
running
);
snd_iprintf
(
buffer
,
" pause: %u
\n
"
,
cable
->
pause
);
print_dpcm_info
(
buffer
,
cable
->
streams
[
0
],
"Playback"
);
print_dpcm_info
(
buffer
,
cable
->
streams
[
1
],
"Capture"
);
}
...
...
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