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submodule
ffmpeg
Commits
1c282f96
Commit
1c282f96
authored
Sep 09, 2011
by
Ramiro Polla
Committed by
Stefano Sabatini
Sep 12, 2011
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dshow: add option to list devices
Signed-off-by:
Stefano Sabatini
<
stefano.sabatini-lala@poste.it
>
parent
fad4e1a5
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1 changed file
with
40 additions
and
1 deletion
+40
-1
dshow.c
libavdevice/dshow.c
+40
-1
No files found.
libavdevice/dshow.c
View file @
1c282f96
...
...
@@ -19,14 +19,20 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/opt.h"
#include "avdevice.h"
#include "dshow.h"
struct
dshow_ctx
{
const
AVClass
*
class
;
IGraphBuilder
*
graph
;
char
*
device_name
[
2
];
int
list_devices
;
IBaseFilter
*
device_filter
[
2
];
IPin
*
device_pin
[
2
];
libAVFilter
*
capture_filter
[
2
];
...
...
@@ -217,6 +223,7 @@ fail:
* Cycle through available devices using the device enumerator devenum,
* retrieve the device with type specified by devtype and return the
* pointer to the object found in *pfilter.
* If pfilter is NULL, list all device names.
*/
static
int
dshow_cycle_devices
(
AVFormatContext
*
avctx
,
ICreateDevEnum
*
devenum
,
...
...
@@ -257,10 +264,14 @@ dshow_cycle_devices(AVFormatContext *avctx, ICreateDevEnum *devenum,
buf
=
dup_wchar_to_utf8
(
var
.
bstrVal
);
if
(
pfilter
)
{
if
(
strcmp
(
device_name
,
buf
))
goto
fail1
;
IMoniker_BindToObject
(
m
,
0
,
0
,
&
IID_IBaseFilter
,
(
void
*
)
&
device_filter
);
}
else
{
av_log
(
avctx
,
AV_LOG_INFO
,
"
\"
%s
\"\n
"
,
buf
);
}
fail1:
if
(
buf
)
...
...
@@ -272,12 +283,14 @@ fail1:
IEnumMoniker_Release
(
classenum
);
if
(
pfilter
)
{
if
(
!
device_filter
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"Could not find %s device.
\n
"
,
devtypename
);
return
AVERROR
(
EIO
);
}
*
pfilter
=
device_filter
;
}
return
0
;
}
...
...
@@ -555,7 +568,7 @@ static int dshow_read_header(AVFormatContext *avctx, AVFormatParameters *ap)
int
ret
=
AVERROR
(
EIO
);
int
r
;
if
(
!
parse_device_name
(
avctx
))
{
if
(
!
ctx
->
list_devices
&&
!
parse_device_name
(
avctx
))
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"Malformed dshow input string.
\n
"
);
goto
error
;
}
...
...
@@ -577,6 +590,15 @@ static int dshow_read_header(AVFormatContext *avctx, AVFormatParameters *ap)
goto
error
;
}
if
(
ctx
->
list_devices
)
{
av_log
(
avctx
,
AV_LOG_INFO
,
"DirectShow video devices
\n
"
);
dshow_cycle_devices
(
avctx
,
devenum
,
VideoDevice
,
NULL
);
av_log
(
avctx
,
AV_LOG_INFO
,
"DirectShow audio devices
\n
"
);
dshow_cycle_devices
(
avctx
,
devenum
,
AudioDevice
,
NULL
);
ret
=
AVERROR_EXIT
;
goto
error
;
}
if
(
ctx
->
device_name
[
VideoDevice
])
{
ret
=
dshow_open_device
(
avctx
,
devenum
,
VideoDevice
);
if
(
ret
<
0
)
...
...
@@ -664,6 +686,22 @@ static int dshow_read_packet(AVFormatContext *s, AVPacket *pkt)
return
pkt
->
size
;
}
#define OFFSET(x) offsetof(struct dshow_ctx, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static
const
AVOption
options
[]
=
{
{
"list_devices"
,
"list available devices"
,
OFFSET
(
list_devices
),
FF_OPT_TYPE_INT
,
{.
dbl
=
0
},
0
,
1
,
DEC
,
"list_devices"
},
{
"true"
,
""
,
0
,
FF_OPT_TYPE_CONST
,
{.
dbl
=
1
},
0
,
0
,
DEC
,
"list_devices"
},
{
"false"
,
""
,
0
,
FF_OPT_TYPE_CONST
,
{.
dbl
=
0
},
0
,
0
,
DEC
,
"list_devices"
},
{
NULL
},
};
static
const
AVClass
dshow_class
=
{
.
class_name
=
"DirectShow indev"
,
.
item_name
=
av_default_item_name
,
.
option
=
options
,
.
version
=
LIBAVUTIL_VERSION_INT
,
};
AVInputFormat
ff_dshow_demuxer
=
{
"dshow"
,
NULL_IF_CONFIG_SMALL
(
"DirectShow capture"
),
...
...
@@ -673,4 +711,5 @@ AVInputFormat ff_dshow_demuxer = {
dshow_read_packet
,
dshow_read_close
,
.
flags
=
AVFMT_NOFILE
,
.
priv_class
=
&
dshow_class
,
};
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