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Linshizhi
ffmpeg.wasm-core
Commits
10024d44
Commit
10024d44
authored
Jul 18, 2007
by
Vitor Sessak
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More cosmetics
Originally committed as revision 9736 to
svn://svn.ffmpeg.org/ffmpeg/trunk
parent
d0da8020
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Showing
1 changed file
with
21 additions
and
23 deletions
+21
-23
alac.c
libavcodec/alac.c
+21
-23
No files found.
libavcodec/alac.c
View file @
10024d44
...
...
@@ -170,7 +170,7 @@ static void bastardized_rice_decompress(ALACContext *alac,
if
(
x
>
8
)
{
/* RICE THRESHOLD */
/* use alternative encoding */
/* use alternative encoding */
int32_t
value
;
value
=
get_bits
(
&
alac
->
gb
,
readsamplesize
);
...
...
@@ -181,7 +181,7 @@ static void bastardized_rice_decompress(ALACContext *alac,
x
=
value
;
}
else
{
/* standard rice encoding */
/* standard rice encoding */
int
extrabits
;
int
k
;
/* size of extra bits */
...
...
@@ -202,9 +202,8 @@ static void bastardized_rice_decompress(ALACContext *alac,
if
(
extrabits
>
1
)
{
x
+=
extrabits
-
1
;
get_bits
(
&
alac
->
gb
,
k
);
}
else
{
}
else
get_bits
(
&
alac
->
gb
,
k
-
1
);
}
}
}
...
...
@@ -217,8 +216,8 @@ static void bastardized_rice_decompress(ALACContext *alac,
sign_modifier
=
0
;
/* now update the history */
history
+=
(
x_modified
*
rice_historymult
)
-
((
history
*
rice_historymult
)
>>
9
);
history
+=
x_modified
*
rice_historymult
-
((
history
*
rice_historymult
)
>>
9
);
if
(
x_modified
>
0xffff
)
history
=
0xffff
;
...
...
@@ -260,7 +259,6 @@ static void bastardized_rice_decompress(ALACContext *alac,
if
(
block_size
>
0
)
{
memset
(
&
output_buffer
[
output_count
+
1
],
0
,
block_size
*
4
);
output_count
+=
block_size
;
}
if
(
block_size
>
0xffff
)
...
...
@@ -292,7 +290,9 @@ static void predictor_decompress_fir_adapt(int32_t *error_buffer,
*
buffer_out
=
*
error_buffer
;
if
(
!
predictor_coef_num
)
{
if
(
output_size
<=
1
)
return
;
if
(
output_size
<=
1
)
return
;
memcpy
(
buffer_out
+
1
,
error_buffer
+
1
,
(
output_size
-
1
)
*
4
);
return
;
}
...
...
@@ -301,21 +301,22 @@ static void predictor_decompress_fir_adapt(int32_t *error_buffer,
/* second-best case scenario for fir decompression,
* error describes a small difference from the previous sample only
*/
if
(
output_size
<=
1
)
return
;
if
(
output_size
<=
1
)
return
;
for
(
i
=
0
;
i
<
output_size
-
1
;
i
++
)
{
int32_t
prev_value
;
int32_t
error_value
;
prev_value
=
buffer_out
[
i
];
error_value
=
error_buffer
[
i
+
1
];
buffer_out
[
i
+
1
]
=
SIGN_EXTENDED32
((
prev_value
+
error_value
),
readsamplesize
);
buffer_out
[
i
+
1
]
=
SIGN_EXTENDED32
((
prev_value
+
error_value
),
readsamplesize
);
}
return
;
}
/* read warm-up samples */
if
(
predictor_coef_num
>
0
)
{
int
i
;
if
(
predictor_coef_num
>
0
)
for
(
i
=
0
;
i
<
predictor_coef_num
;
i
++
)
{
int32_t
val
;
...
...
@@ -325,7 +326,6 @@ static void predictor_decompress_fir_adapt(int32_t *error_buffer,
buffer_out
[
i
+
1
]
=
val
;
}
}
#if 0
/* 4 and 8 are very common cases (the only ones i've seen). these
...
...
@@ -345,9 +345,7 @@ static void predictor_decompress_fir_adapt(int32_t *error_buffer,
/* general case */
if
(
predictor_coef_num
>
0
)
{
for
(
i
=
predictor_coef_num
+
1
;
i
<
output_size
;
i
++
)
{
for
(
i
=
predictor_coef_num
+
1
;
i
<
output_size
;
i
++
)
{
int
j
;
int
sum
=
0
;
int
outval
;
...
...
@@ -405,13 +403,14 @@ static void predictor_decompress_fir_adapt(int32_t *error_buffer,
}
static
void
deinterlace_16
(
int32_t
*
buffer_a
,
int32_t
*
buffer_b
,
int16_t
*
buffer_out
,
int
numchannels
,
int
numsamples
,
uint8_t
interlacing_shift
,
uint8_t
interlacing_leftweight
)
int16_t
*
buffer_out
,
int
numchannels
,
int
numsamples
,
uint8_t
interlacing_shift
,
uint8_t
interlacing_leftweight
)
{
int
i
;
if
(
numsamples
<=
0
)
return
;
if
(
numsamples
<=
0
)
return
;
/* weighted interlacing */
if
(
interlacing_leftweight
)
{
...
...
@@ -533,9 +532,8 @@ static int alac_decode_frame(AVCodecContext *avctx,
predictor_coef_num
[
chan
]
=
get_bits
(
&
alac
->
gb
,
5
);
/* read the predictor table */
for
(
i
=
0
;
i
<
predictor_coef_num
[
chan
];
i
++
)
{
for
(
i
=
0
;
i
<
predictor_coef_num
[
chan
];
i
++
)
predictor_coef_table
[
chan
][
i
]
=
(
int16_t
)
get_bits
(
&
alac
->
gb
,
16
);
}
}
if
(
wasted_bytes
)
{
...
...
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