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Linshizhi
ffmpeg.wasm-core
Commits
6735534f
Commit
6735534f
authored
Jan 15, 2011
by
Stefano Sabatini
Committed by
Anton Khirnov
May 09, 2012
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lavfi: use avfilter_get_audio_buffer_ref_from_arrays() in avfilter_default_get_audio_buffer
parent
e727bca3
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1 changed file
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18 additions
and
64 deletions
+18
-64
defaults.c
libavfilter/defaults.c
+18
-64
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libavfilter/defaults.c
View file @
6735534f
...
...
@@ -61,78 +61,32 @@ AVFilterBufferRef *avfilter_default_get_audio_buffer(AVFilterLink *link, int per
enum
AVSampleFormat
sample_fmt
,
int
nb_samples
,
uint64_t
channel_layout
)
{
AVFilterBuffer
*
samples
=
av_mallocz
(
sizeof
(
AVFilterBuffer
));
AVFilterBufferRef
*
ref
=
NULL
;
int
i
,
sample_size
,
chans_nb
,
bufsize
,
per_channel_size
,
step_size
=
0
;
int
planar
=
av_sample_fmt_is_planar
(
sample_fmt
);
char
*
buf
;
if
(
!
samples
||
!
(
ref
=
av_mallocz
(
sizeof
(
AVFilterBufferRef
))))
AVFilterBufferRef
*
samplesref
=
NULL
;
uint8_t
**
data
;
int
planar
=
av_sample_fmt_is_planar
(
sample_fmt
);
int
nb_channels
=
av_get_channel_layout_nb_channels
(
channel_layout
);
int
planes
=
planar
?
nb_channels
:
1
;
int
linesize
;
if
(
!
(
data
=
av_mallocz
(
sizeof
(
*
data
)
*
planes
)))
goto
fail
;
ref
->
buf
=
samples
;
ref
->
format
=
sample_fmt
;
ref
->
audio
=
av_mallocz
(
sizeof
(
AVFilterBufferRefAudioProps
));
if
(
!
ref
->
audio
)
if
(
av_samples_alloc
(
data
,
&
linesize
,
nb_channels
,
nb_samples
,
sample_fmt
,
0
)
<
0
)
goto
fail
;
ref
->
audio
->
channel_layout
=
channel_layout
;
ref
->
audio
->
nb_samples
=
nb_samples
;
ref
->
audio
->
planar
=
planar
;
/* make sure the buffer gets read permission or it's useless for output */
ref
->
perms
=
perms
|
AV_PERM_READ
;
samples
->
refcount
=
1
;
samples
->
free
=
ff_avfilter_default_free_buffer
;
sample_size
=
av_get_bytes_per_sample
(
sample_fmt
);
chans_nb
=
av_get_channel_layout_nb_channels
(
channel_layout
);
per_channel_size
=
nb_samples
*
sample_size
;
/* Set the number of bytes to traverse to reach next sample of a particular channel:
* For planar, this is simply the sample size.
* For packed, this is the number of samples * sample_size.
*/
for
(
i
=
0
;
i
<
chans_nb
;
i
++
)
samples
->
linesize
[
i
]
=
planar
>
0
?
per_channel_size
:
sample_size
;
memset
(
&
samples
->
linesize
[
chans_nb
],
0
,
(
8
-
chans_nb
)
*
sizeof
(
samples
->
linesize
[
0
]));
/* Calculate total buffer size, round to multiple of 16 to be SIMD friendly */
bufsize
=
(
nb_samples
*
chans_nb
*
sample_size
+
15
)
&~
15
;
buf
=
av_malloc
(
bufsize
);
if
(
!
buf
)
samplesref
=
avfilter_get_audio_buffer_ref_from_arrays
(
data
,
linesize
,
perms
,
nb_samples
,
sample_fmt
,
channel_layout
);
if
(
!
samplesref
)
goto
fail
;
/* For planar, set the start point of each channel's data within the buffer
* For packed, set the start point of the entire buffer only
*/
samples
->
data
[
0
]
=
buf
;
if
(
buf
&&
planar
)
{
for
(
i
=
1
;
i
<
chans_nb
;
i
++
)
{
step_size
+=
per_channel_size
;
samples
->
data
[
i
]
=
buf
+
step_size
;
}
}
else
{
for
(
i
=
1
;
i
<
chans_nb
;
i
++
)
samples
->
data
[
i
]
=
buf
;
}
memset
(
&
samples
->
data
[
chans_nb
],
0
,
(
8
-
chans_nb
)
*
sizeof
(
samples
->
data
[
0
]));
memcpy
(
ref
->
data
,
samples
->
data
,
sizeof
(
ref
->
data
));
memcpy
(
ref
->
linesize
,
samples
->
linesize
,
sizeof
(
ref
->
linesize
));
return
ref
;
av_freep
(
&
data
);
fail:
if
(
ref
)
av_free
(
ref
->
audio
);
av_free
(
ref
);
av_free
(
samples
);
return
NULL
;
if
(
data
)
av_freep
(
&
data
[
0
]);
av_freep
(
&
data
);
return
samplesref
;
}
void
avfilter_default_start_frame
(
AVFilterLink
*
inlink
,
AVFilterBufferRef
*
picref
)
...
...
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