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Stefan Westerfeld
audiowmark
Commits
d42a8b0b
Commit
d42a8b0b
authored
May 27, 2022
by
Stefan Westerfeld
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Reuse last value for speed compare bits start search (performance).
Signed-off-by:
Stefan Westerfeld
<
stefan@space.twc.de
>
parent
09fd6a9b
Changes
1
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13 deletions
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-13
wmspeed.cc
src/wmspeed.cc
+13
-13
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src/wmspeed.cc
View file @
d42a8b0b
...
...
@@ -136,7 +136,7 @@ private:
void
prepare_mags
(
const
SpeedScanParams
&
scan_params
);
void
compare
(
double
relative_speed
);
template
<
bool
B2
>
void
compare_bits
(
BitValue
*
bit_values
,
double
relative_speed
,
int
offset
);
void
compare_bits
(
BitValue
*
bit_values
,
double
relative_speed
,
int
*
start_mi
,
int
offset
);
std
::
mutex
mutex
;
vector
<
Score
>
result_scores
;
...
...
@@ -283,25 +283,24 @@ SpeedSync::prepare_mags (const SpeedScanParams& scan_params)
}
template
<
bool
B2
>
void
SpeedSync
::
compare_bits
(
BitValue
*
bit_values
,
double
relative_speed
,
int
offset
)
SpeedSync
::
compare_bits
(
BitValue
*
bit_values
,
double
relative_speed
,
int
*
start_mi
,
int
offset
)
{
const
int
steps_per_frame
=
Params
::
frame_size
/
Params
::
sync_search_step
;
const
double
relative_speed_inv
=
1
/
relative_speed
;
/* search start */
auto
si
=
sync_bits
.
begin
()
;
while
(
si
!=
sync_bits
.
end
()
)
int
mi
=
*
start_mi
;
while
(
mi
>
0
)
{
int
index
=
offset
+
si
->
frame
*
steps_per_frame
;
if
(
index
>=
0
)
int
index
=
offset
+
sync_bits
[
mi
-
1
].
frame
*
steps_per_frame
;
if
(
index
<
0
)
break
;
si
++
;
mi
--
;
}
int
mi
=
si
-
sync_bits
.
begin
()
;
*
start_mi
=
mi
;
while
(
si
!=
sync_bits
.
end
()
)
for
(
auto
si
=
sync_bits
.
begin
()
+
mi
;
si
!=
sync_bits
.
end
();
si
++
)
{
int
index
=
offset
+
si
->
frame
*
steps_per_frame
;
...
...
@@ -323,7 +322,6 @@ SpeedSync::compare_bits (BitValue *bit_values, double relative_speed, int offset
}
bv
.
count
++
;
si
++
;
mi
++
;
}
}
...
...
@@ -337,12 +335,14 @@ SpeedSync::compare (double relative_speed)
assert
(
steps_per_frame
*
Params
::
sync_search_step
==
Params
::
frame_size
);
int
start_mi1
=
sync_bits
.
size
();
int
start_mi2
=
sync_bits
.
size
();
for
(
int
offset
=
-
pad_start
;
offset
<
0
;
offset
++
)
{
BitValue
bit_values
[
Params
::
sync_bits
];
compare_bits
<
false
>
(
bit_values
,
relative_speed
,
offset
);
compare_bits
<
true
>
(
bit_values
,
relative_speed
,
offset
+
frames_per_block
*
steps_per_frame
);
compare_bits
<
false
>
(
bit_values
,
relative_speed
,
&
start_mi1
,
offset
);
compare_bits
<
true
>
(
bit_values
,
relative_speed
,
&
start_mi2
,
offset
+
frames_per_block
*
steps_per_frame
);
double
sync_quality
=
0
;
int
bit_count
=
0
;
...
...
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