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Stefan Westerfeld
audiowmark
Commits
c2d3e569
Commit
c2d3e569
authored
Nov 28, 2018
by
Stefan Westerfeld
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More FFT refactoring.
Signed-off-by:
Stefan Westerfeld
<
stefan@space.twc.de
>
parent
9d0fa112
Changes
1
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audiowmark.cc
src/audiowmark.cc
+3
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src/audiowmark.cc
View file @
c2d3e569
...
...
@@ -390,33 +390,19 @@ get_watermark (const string& origfile, const string& infile, const string& orig_
frame
[
i
]
*=
2.0
/
window_weight
;
/* FFT transform */
float
*
fft_in
=
new_array_float
(
frame
.
size
());
float
*
fft_out
=
new_array_float
(
frame
.
size
());
std
::
copy
(
frame
.
begin
(),
frame
.
end
(),
fft_in
);
fftar_float
(
frame
.
size
(),
fft_in
,
fft_out
);
vector
<
complex
<
float
>>
fft_out
=
fft
(
frame
);
vector
<
int
>
up
;
vector
<
int
>
down
;
get_up_down
(
f
,
up
,
down
);
for
(
auto
u
:
up
)
{
const
double
re
=
fft_out
[
u
*
2
];
const
double
im
=
fft_out
[
u
*
2
+
1
];
const
double
mag
=
sqrt
(
re
*
re
+
im
*
im
);
umag
+=
log
(
mag
);
umag
+=
log
(
abs
(
fft_out
[
u
]));
}
for
(
auto
d
:
down
)
{
const
double
re
=
fft_out
[
d
*
2
];
const
double
im
=
fft_out
[
d
*
2
+
1
];
const
double
mag
=
sqrt
(
re
*
re
+
im
*
im
);
dmag
+=
log
(
mag
);
dmag
+=
log
(
abs
(
fft_out
[
d
]));
}
free_array_float
(
fft_out
);
free_array_float
(
fft_in
);
}
}
if
((
f
%
Params
::
frames_per_bit
)
==
(
Params
::
frames_per_bit
-
1
))
...
...
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