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c343e81f
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前往新版Gitcode,体验更适合开发者的 AI 搜索 >>
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c343e81f
编写于
12月 28, 2018
作者:
P
Paul B Mahol
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
avfilter/af_afir: introduce init_segment() and use it
上级
e5705341
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
39 addition
and
30 deletion
+39
-30
libavfilter/af_afir.c
libavfilter/af_afir.c
+39
-30
未找到文件。
libavfilter/af_afir.c
浏览文件 @
c343e81f
...
...
@@ -274,6 +274,42 @@ end:
av_free
(
mag
);
}
static
int
init_segment
(
AVFilterContext
*
ctx
,
AudioFIRSegment
*
seg
,
int
nb_partitions
,
int
part_size
)
{
seg
->
coeff
=
av_calloc
(
ctx
->
inputs
[
1
]
->
channels
,
sizeof
(
*
seg
->
coeff
));
seg
->
rdft
=
av_calloc
(
ctx
->
inputs
[
0
]
->
channels
,
sizeof
(
*
seg
->
rdft
));
seg
->
irdft
=
av_calloc
(
ctx
->
inputs
[
0
]
->
channels
,
sizeof
(
*
seg
->
irdft
));
if
(
!
seg
->
coeff
||
!
seg
->
rdft
||
!
seg
->
irdft
)
return
AVERROR
(
ENOMEM
);
seg
->
fft_length
=
part_size
*
4
+
1
;
seg
->
part_size
=
part_size
;
seg
->
block_size
=
FFALIGN
(
seg
->
fft_length
,
32
);
seg
->
coeff_size
=
FFALIGN
(
seg
->
part_size
+
1
,
32
);
seg
->
nb_partitions
=
nb_partitions
;
for
(
int
ch
=
0
;
ch
<
ctx
->
inputs
[
1
]
->
channels
;
ch
++
)
{
seg
->
coeff
[
ch
]
=
av_calloc
(
seg
->
nb_partitions
*
seg
->
coeff_size
,
sizeof
(
**
seg
->
coeff
));
if
(
!
seg
->
coeff
[
ch
])
return
AVERROR
(
ENOMEM
);
}
for
(
int
ch
=
0
;
ch
<
ctx
->
inputs
[
0
]
->
channels
;
ch
++
)
{
seg
->
rdft
[
ch
]
=
av_rdft_init
(
av_log2
(
2
*
part_size
),
DFT_R2C
);
seg
->
irdft
[
ch
]
=
av_rdft_init
(
av_log2
(
2
*
part_size
),
IDFT_C2R
);
if
(
!
seg
->
rdft
[
ch
]
||
!
seg
->
irdft
[
ch
])
return
AVERROR
(
ENOMEM
);
}
seg
->
sum
=
ff_get_audio_buffer
(
ctx
->
inputs
[
0
],
seg
->
fft_length
);
seg
->
block
=
ff_get_audio_buffer
(
ctx
->
inputs
[
0
],
seg
->
nb_partitions
*
seg
->
block_size
);
seg
->
buffer
=
ff_get_audio_buffer
(
ctx
->
inputs
[
0
],
seg
->
part_size
);
if
(
!
seg
->
buffer
||
!
seg
->
sum
||
!
seg
->
block
)
return
AVERROR
(
ENOMEM
);
return
0
;
}
static
int
convert_coeffs
(
AVFilterContext
*
ctx
)
{
AudioFIRContext
*
s
=
ctx
->
priv
;
...
...
@@ -287,36 +323,9 @@ static int convert_coeffs(AVFilterContext *ctx)
for
(
n
=
av_log2
(
s
->
minp
);
(
1
<<
n
)
<
s
->
nb_taps
;
n
++
);
N
=
FFMIN
(
n
,
av_log2
(
s
->
maxp
));
s
->
seg
.
coeff
=
av_calloc
(
ctx
->
inputs
[
1
]
->
channels
,
sizeof
(
*
s
->
seg
.
coeff
));
s
->
seg
.
rdft
=
av_calloc
(
ctx
->
inputs
[
0
]
->
channels
,
sizeof
(
*
s
->
seg
.
rdft
));
s
->
seg
.
irdft
=
av_calloc
(
ctx
->
inputs
[
0
]
->
channels
,
sizeof
(
*
s
->
seg
.
irdft
));
if
(
!
s
->
seg
.
coeff
||
!
s
->
seg
.
rdft
||
!
s
->
seg
.
irdft
)
return
AVERROR
(
ENOMEM
);
s
->
seg
.
fft_length
=
(
1
<<
(
N
+
1
))
+
1
;
s
->
seg
.
part_size
=
1
<<
(
N
-
1
);
s
->
seg
.
block_size
=
FFALIGN
(
s
->
seg
.
fft_length
,
32
);
s
->
seg
.
coeff_size
=
FFALIGN
(
s
->
seg
.
part_size
+
1
,
32
);
s
->
seg
.
nb_partitions
=
(
s
->
nb_taps
+
s
->
seg
.
part_size
-
1
)
/
s
->
seg
.
part_size
;
for
(
ch
=
0
;
ch
<
ctx
->
inputs
[
1
]
->
channels
;
ch
++
)
{
s
->
seg
.
coeff
[
ch
]
=
av_calloc
(
s
->
seg
.
nb_partitions
*
s
->
seg
.
coeff_size
,
sizeof
(
**
s
->
seg
.
coeff
));
if
(
!
s
->
seg
.
coeff
[
ch
])
return
AVERROR
(
ENOMEM
);
}
for
(
ch
=
0
;
ch
<
ctx
->
inputs
[
0
]
->
channels
;
ch
++
)
{
s
->
seg
.
rdft
[
ch
]
=
av_rdft_init
(
N
,
DFT_R2C
);
s
->
seg
.
irdft
[
ch
]
=
av_rdft_init
(
N
,
IDFT_C2R
);
if
(
!
s
->
seg
.
rdft
[
ch
]
||
!
s
->
seg
.
irdft
[
ch
])
return
AVERROR
(
ENOMEM
);
}
s
->
seg
.
sum
=
ff_get_audio_buffer
(
ctx
->
inputs
[
0
],
s
->
seg
.
fft_length
);
s
->
seg
.
block
=
ff_get_audio_buffer
(
ctx
->
inputs
[
0
],
s
->
seg
.
nb_partitions
*
s
->
seg
.
block_size
);
s
->
seg
.
buffer
=
ff_get_audio_buffer
(
ctx
->
inputs
[
0
],
s
->
seg
.
part_size
);
if
(
!
s
->
seg
.
buffer
||
!
s
->
seg
.
sum
||
!
s
->
seg
.
block
)
return
AVERROR
(
ENOMEM
);
ret
=
init_segment
(
ctx
,
&
s
->
seg
,
(
s
->
nb_taps
+
(
1
<<
N
)
-
1
)
/
(
1
<<
N
),
1
<<
N
);
if
(
ret
<
0
)
return
ret
;
ret
=
ff_inlink_consume_samples
(
ctx
->
inputs
[
1
],
s
->
nb_taps
,
s
->
nb_taps
,
&
s
->
in
[
1
]);
if
(
ret
<
0
)
...
...
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