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Linshizhi
ffmpeg.wasm-core
Commits
530902f3
Commit
530902f3
authored
Feb 01, 2008
by
Michael Niedermayer
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const
Originally committed as revision 11754 to
svn://svn.ffmpeg.org/ffmpeg/trunk
parent
48670d47
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Showing
1 changed file
with
16 additions
and
16 deletions
+16
-16
4xm.c
libavcodec/4xm.c
+16
-16
No files found.
libavcodec/4xm.c
View file @
530902f3
...
...
@@ -131,8 +131,8 @@ typedef struct FourXContext{
AVFrame
current_picture
,
last_picture
;
GetBitContext
pre_gb
;
///< ac/dc prefix
GetBitContext
gb
;
uint8_t
*
bytestream
;
uint16_t
*
wordstream
;
const
uint8_t
*
bytestream
;
const
uint16_t
*
wordstream
;
int
mv
[
256
];
VLC
pre_vlc
;
int
last_dc
;
...
...
@@ -347,7 +347,7 @@ static int get32(void *p){
return
le2me_32
(
*
(
uint32_t
*
)
p
);
}
static
int
decode_p_frame
(
FourXContext
*
f
,
uint8_t
*
buf
,
int
length
){
static
int
decode_p_frame
(
FourXContext
*
f
,
const
uint8_t
*
buf
,
int
length
){
int
x
,
y
;
const
int
width
=
f
->
avctx
->
width
;
const
int
height
=
f
->
avctx
->
height
;
...
...
@@ -379,10 +379,10 @@ static int decode_p_frame(FourXContext *f, uint8_t *buf, int length){
}
f
->
bitstream_buffer
=
av_fast_realloc
(
f
->
bitstream_buffer
,
&
f
->
bitstream_buffer_size
,
bitstream_size
+
FF_INPUT_BUFFER_PADDING_SIZE
);
f
->
dsp
.
bswap_buf
((
uint32_t
*
)
f
->
bitstream_buffer
,
(
uint32_t
*
)(
buf
+
extra
),
bitstream_size
/
4
);
f
->
dsp
.
bswap_buf
((
uint32_t
*
)
f
->
bitstream_buffer
,
(
const
uint32_t
*
)(
buf
+
extra
),
bitstream_size
/
4
);
init_get_bits
(
&
f
->
gb
,
f
->
bitstream_buffer
,
8
*
bitstream_size
);
f
->
wordstream
=
(
uint16_t
*
)(
buf
+
extra
+
bitstream_size
);
f
->
wordstream
=
(
const
uint16_t
*
)(
buf
+
extra
+
bitstream_size
);
f
->
bytestream
=
buf
+
extra
+
bitstream_size
+
wordstream_size
;
init_mv
(
f
);
...
...
@@ -396,12 +396,12 @@ static int decode_p_frame(FourXContext *f, uint8_t *buf, int length){
}
if
(
bitstream_size
!=
(
get_bits_count
(
&
f
->
gb
)
+
31
)
/
32
*
4
||
(((
c
har
*
)
f
->
wordstream
-
(
char
*
)
buf
+
2
)
&~
2
)
!=
extra
+
bitstream_size
+
wordstream_size
||
(((
c
har
*
)
f
->
bytestream
-
(
char
*
)
buf
+
3
)
&~
3
)
!=
extra
+
bitstream_size
+
wordstream_size
+
bytestream_size
)
||
(((
c
onst
char
*
)
f
->
wordstream
-
(
const
char
*
)
buf
+
2
)
&~
2
)
!=
extra
+
bitstream_size
+
wordstream_size
||
(((
c
onst
char
*
)
f
->
bytestream
-
(
const
char
*
)
buf
+
3
)
&~
3
)
!=
extra
+
bitstream_size
+
wordstream_size
+
bytestream_size
)
av_log
(
f
->
avctx
,
AV_LOG_ERROR
,
" %d %td %td bytes left
\n
"
,
bitstream_size
-
(
get_bits_count
(
&
f
->
gb
)
+
31
)
/
32
*
4
,
-
(((
c
har
*
)
f
->
bytestream
-
(
char
*
)
buf
+
3
)
&~
3
)
+
(
extra
+
bitstream_size
+
wordstream_size
+
bytestream_size
),
-
(((
c
har
*
)
f
->
wordstream
-
(
char
*
)
buf
+
2
)
&~
2
)
+
(
extra
+
bitstream_size
+
wordstream_size
)
-
(((
c
onst
char
*
)
f
->
bytestream
-
(
const
char
*
)
buf
+
3
)
&~
3
)
+
(
extra
+
bitstream_size
+
wordstream_size
+
bytestream_size
),
-
(((
c
onst
char
*
)
f
->
wordstream
-
(
const
char
*
)
buf
+
2
)
&~
2
)
+
(
extra
+
bitstream_size
+
wordstream_size
)
);
return
0
;
...
...
@@ -512,14 +512,14 @@ static int decode_i_mb(FourXContext *f){
return
0
;
}
static
uint8_t
*
read_huffman_tables
(
FourXContext
*
f
,
uint8_t
*
const
buf
){
static
const
uint8_t
*
read_huffman_tables
(
FourXContext
*
f
,
const
uint8_t
*
const
buf
){
int
frequency
[
512
];
uint8_t
flag
[
512
];
int
up
[
512
];
uint8_t
len_tab
[
257
];
int
bits_tab
[
257
];
int
start
,
end
;
uint8_t
*
ptr
=
buf
;
const
uint8_t
*
ptr
=
buf
;
int
j
;
memset
(
frequency
,
0
,
sizeof
(
frequency
));
...
...
@@ -596,7 +596,7 @@ static int mix(int c0, int c1){
return
red
/
3
*
1024
+
green
/
3
*
32
+
blue
/
3
;
}
static
int
decode_i2_frame
(
FourXContext
*
f
,
uint8_t
*
buf
,
int
length
){
static
int
decode_i2_frame
(
FourXContext
*
f
,
const
uint8_t
*
buf
,
int
length
){
int
x
,
y
,
x2
,
y2
;
const
int
width
=
f
->
avctx
->
width
;
const
int
height
=
f
->
avctx
->
height
;
...
...
@@ -632,7 +632,7 @@ static int decode_i2_frame(FourXContext *f, uint8_t *buf, int length){
return
0
;
}
static
int
decode_i_frame
(
FourXContext
*
f
,
uint8_t
*
buf
,
int
length
){
static
int
decode_i_frame
(
FourXContext
*
f
,
const
uint8_t
*
buf
,
int
length
){
int
x
,
y
;
const
int
width
=
f
->
avctx
->
width
;
const
int
height
=
f
->
avctx
->
height
;
...
...
@@ -641,7 +641,7 @@ static int decode_i_frame(FourXContext *f, uint8_t *buf, int length){
const
unsigned
int
bitstream_size
=
get32
(
buf
);
const
int
token_count
av_unused
=
get32
(
buf
+
bitstream_size
+
8
);
unsigned
int
prestream_size
=
4
*
get32
(
buf
+
bitstream_size
+
4
);
uint8_t
*
prestream
=
buf
+
bitstream_size
+
12
;
const
uint8_t
*
prestream
=
buf
+
bitstream_size
+
12
;
if
(
prestream_size
+
bitstream_size
+
12
!=
length
||
bitstream_size
>
(
1
<<
26
)
...
...
@@ -657,7 +657,7 @@ static int decode_i_frame(FourXContext *f, uint8_t *buf, int length){
prestream_size
=
length
+
buf
-
prestream
;
f
->
bitstream_buffer
=
av_fast_realloc
(
f
->
bitstream_buffer
,
&
f
->
bitstream_buffer_size
,
prestream_size
+
FF_INPUT_BUFFER_PADDING_SIZE
);
f
->
dsp
.
bswap_buf
((
uint32_t
*
)
f
->
bitstream_buffer
,
(
uint32_t
*
)
prestream
,
prestream_size
/
4
);
f
->
dsp
.
bswap_buf
((
uint32_t
*
)
f
->
bitstream_buffer
,
(
const
uint32_t
*
)
prestream
,
prestream_size
/
4
);
init_get_bits
(
&
f
->
pre_gb
,
f
->
bitstream_buffer
,
8
*
prestream_size
);
f
->
last_dc
=
0
*
128
*
8
*
8
;
...
...
@@ -680,7 +680,7 @@ static int decode_i_frame(FourXContext *f, uint8_t *buf, int length){
static
int
decode_frame
(
AVCodecContext
*
avctx
,
void
*
data
,
int
*
data_size
,
uint8_t
*
buf
,
int
buf_size
)
const
uint8_t
*
buf
,
int
buf_size
)
{
FourXContext
*
const
f
=
avctx
->
priv_data
;
AVFrame
*
picture
=
data
;
...
...
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