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BC
public
mediastreamer2
Commits
51feb8dc
Commit
51feb8dc
authored
Mar 05, 2013
by
Ghislain MARY
Browse files
Add the void_source filter that generates silence.
parent
e5f7137b
Changes
4
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4 changed files
with
87 additions
and
0 deletions
+87
-0
build/android/basedescs.h
build/android/basedescs.h
+2
-0
build/iphone/basedescs.h
build/iphone/basedescs.h
+2
-0
include/mediastreamer2/allfilters.h
include/mediastreamer2/allfilters.h
+1
-0
src/otherfilters/void.c
src/otherfilters/void.c
+82
-0
No files found.
build/android/basedescs.h
View file @
51feb8dc
...
...
@@ -2,12 +2,14 @@
extern
MSFilterDesc
ms_tee_desc
;
extern
MSFilterDesc
ms_join_desc
;
extern
MSFilterDesc
ms_void_source_desc
;
extern
MSFilterDesc
ms_void_sink_desc
;
MSFilterDesc
*
ms_base_filter_descs
[]
=
{
&
ms_tee_desc
,
&
ms_join_desc
,
&
ms_void_source_desc
,
&
ms_void_sink_desc
,
NULL
};
...
...
build/iphone/basedescs.h
View file @
51feb8dc
...
...
@@ -2,6 +2,7 @@
extern
MSFilterDesc
ms_tee_desc
;
extern
MSFilterDesc
ms_join_desc
;
extern
MSFilterDesc
ms_void_source_desc
;
extern
MSFilterDesc
ms_void_sink_desc
;
extern
MSFilterDesc
ms_itc_source_desc
;
extern
MSFilterDesc
ms_itc_sink_desc
;
...
...
@@ -9,6 +10,7 @@ extern MSFilterDesc ms_itc_sink_desc;
MSFilterDesc
*
ms_base_filter_descs
[]
=
{
&
ms_tee_desc
,
&
ms_join_desc
,
&
ms_void_source_desc
,
&
ms_void_sink_desc
,
&
ms_itc_source_desc
,
&
ms_itc_sink_desc
,
...
...
include/mediastreamer2/allfilters.h
View file @
51feb8dc
...
...
@@ -81,6 +81,7 @@ typedef enum MSFilterId{
MS_H263_OLD_ENC_ID
,
MS_MIRE_ID
,
MS_VFW_ID
,
MS_VOID_SOURCE_ID
,
MS_VOID_SINK_ID
,
MS_DSCAP_ID
,
MS_AQ_READ_ID
,
...
...
src/otherfilters/void.c
View file @
51feb8dc
...
...
@@ -18,8 +18,58 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "mediastreamer2/msfilter.h"
#include "mediastreamer2/msticker.h"
struct
VoidSourceState
{
int
rate
;
int
nchannels
;
};
typedef
struct
VoidSourceState
VoidSourceState
;
static
void
void_source_init
(
MSFilter
*
f
)
{
VoidSourceState
*
s
=
(
VoidSourceState
*
)
ms_new
(
VoidSourceState
,
1
);
s
->
rate
=
8000
;
s
->
nchannels
=
1
;
f
->
data
=
s
;
}
static
void
void_source_uninit
(
MSFilter
*
f
)
{
ms_free
(
f
->
data
);
}
static
void
void_source_process
(
MSFilter
*
f
)
{
mblk_t
*
m
;
VoidSourceState
*
s
=
(
VoidSourceState
*
)
f
->
data
;
int
nsamples
;
nsamples
=
(
f
->
ticker
->
interval
*
s
->
rate
)
/
1000
;
m
=
allocb
(
nsamples
*
s
->
nchannels
*
2
,
0
);
memset
(
m
->
b_wptr
,
0
,
nsamples
*
s
->
nchannels
*
2
);
m
->
b_wptr
+=
nsamples
*
s
->
nchannels
*
2
;
ms_queue_put
(
f
->
outputs
[
0
],
m
);
}
static
int
void_source_set_rate
(
MSFilter
*
f
,
void
*
arg
)
{
VoidSourceState
*
s
=
(
VoidSourceState
*
)
f
->
data
;
s
->
rate
=
*
((
int
*
)
arg
);
return
0
;
}
static
int
void_source_set_nchannels
(
MSFilter
*
f
,
void
*
arg
)
{
VoidSourceState
*
s
=
(
VoidSourceState
*
)
f
->
data
;
s
->
nchannels
=
*
(
int
*
)
arg
;
return
0
;
}
MSFilterMethod
void_source_methods
[]
=
{
{
MS_FILTER_SET_SAMPLE_RATE
,
void_source_set_rate
},
{
MS_FILTER_SET_NCHANNELS
,
void_source_set_nchannels
},
{
0
,
NULL
}
};
static
void
void_sink_process
(
MSFilter
*
f
){
mblk_t
*
im
;
while
((
im
=
ms_queue_get
(
f
->
inputs
[
0
]))
!=
NULL
){
...
...
@@ -29,6 +79,23 @@ static void void_sink_process(MSFilter *f){
#ifdef _MSC_VER
MSFilterDesc
ms_void_source_desc
=
{
MS_VOID_SOURCE_ID
,
"MSVoidSource"
,
N_
(
"A filter that generates silence on its output (useful for beginning some graphs)."
),
MS_FILTER_OTHER
,
NULL
,
0
,
1
,
void_source_init
,
NULL
,
void_source_process
,
NULL
,
void_source_uninit
,
void_source_methods
,
MS_FILTER_IS_PUMP
};
MSFilterDesc
ms_void_sink_desc
=
{
MS_VOID_SINK_ID
,
"MSVoidSink"
,
...
...
@@ -46,6 +113,20 @@ MSFilterDesc ms_void_sink_desc={
#else
MSFilterDesc
ms_void_source_desc
=
{
.
id
=
MS_VOID_SOURCE_ID
,
.
name
=
"MSVoidSource"
,
.
text
=
N_
(
"A filter that generates silence on its output (useful for beginning some graphs)."
),
.
category
=
MS_FILTER_OTHER
,
.
ninputs
=
0
,
.
noutputs
=
1
,
.
init
=
void_source_init
,
.
process
=
void_source_process
,
.
uninit
=
void_source_uninit
,
.
methods
=
void_source_methods
,
.
flags
=
MS_FILTER_IS_PUMP
};
MSFilterDesc
ms_void_sink_desc
=
{
.
id
=
MS_VOID_SINK_ID
,
.
name
=
"MSVoidSink"
,
...
...
@@ -58,4 +139,5 @@ MSFilterDesc ms_void_sink_desc={
#endif
MS_FILTER_DESC_EXPORT
(
ms_void_source_desc
)
MS_FILTER_DESC_EXPORT
(
ms_void_sink_desc
)
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