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Stefan Westerfeld
ffmpeg
Commits
8a6799d2
Commit
8a6799d2
authored
Oct 15, 2011
by
JULIAN GARDNER
Committed by
Michael Niedermayer
Oct 15, 2011
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dvbsub: add dvb_encode_rle8()
Signed-off-by:
Michael Niedermayer
<
michaelni@gmx.at
>
parent
7fa1f02c
Changes
1
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1 changed file
with
61 additions
and
0 deletions
+61
-0
dvbsub.c
libavcodec/dvbsub.c
+61
-0
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libavcodec/dvbsub.c
View file @
8a6799d2
...
...
@@ -194,6 +194,61 @@ static void dvb_encode_rle4(uint8_t **pq,
*
pq
=
q
;
}
static
void
dvb_encode_rle8
(
uint8_t
**
pq
,
const
uint8_t
*
bitmap
,
int
linesize
,
int
w
,
int
h
)
{
uint8_t
*
q
;
int
x
,
y
,
len
,
x1
,
f
,
color
;
q
=
*
pq
;
for
(
y
=
0
;
y
<
h
;
y
++
)
{
*
q
++
=
0x12
;
x
=
0
;
f
=
0
;
while
(
x
<
w
)
{
x1
=
x
;
color
=
bitmap
[
x1
++
];
while
(
x1
<
w
&&
bitmap
[
x1
]
==
color
)
x1
++
;
len
=
x1
-
x
;
if
(
len
==
1
&&
color
)
{
// 00000001 to 11111111 1 pixel in colour x
*
q
++
=
color
;
}
else
{
if
(
color
==
0x00
)
{
// 00000000 0LLLLLLL L pixels (1-127) in colour 0 (L > 0)
len
=
FFMIN
(
len
,
127
);
*
q
++
=
0x00
;
*
q
++
=
len
;
}
else
if
(
len
>
2
)
{
// 00000000 1LLLLLLL CCCCCCCC L pixels (3-127) in colour C (L > 2)
len
=
FFMIN
(
len
,
127
);
*
q
++
=
0x00
;
*
q
++
=
0x80
+
len
;
*
q
++
=
color
;
}
else
if
(
len
==
2
)
{
*
q
++
=
color
;
*
q
++
=
color
;
}
else
{
*
q
++
=
color
;
len
=
1
;
}
}
x
+=
len
;
}
/* end of line */
// 00000000 00000000 end of 8-bit/pixel_code_string
*
q
++
=
0x00
;
*
q
++
=
0x00
;
bitmap
+=
linesize
;
}
*
pq
=
q
;
}
static
int
encode_dvb_subtitles
(
DVBSubtitleContext
*
s
,
uint8_t
*
outbuf
,
AVSubtitle
*
h
)
{
...
...
@@ -245,6 +300,9 @@ static int encode_dvb_subtitles(DVBSubtitleContext *s,
}
else
if
(
h
->
rects
[
clut_id
]
->
nb_colors
<=
16
)
{
/* 4 bpp, standard encoding */
bpp_index
=
1
;
}
else
if
(
h
->
rects
[
clut_id
]
->
nb_colors
<=
256
)
{
/* 8 bpp, standard encoding */
bpp_index
=
2
;
}
else
{
return
-
1
;
}
...
...
@@ -332,6 +390,9 @@ static int encode_dvb_subtitles(DVBSubtitleContext *s,
}
else
if
(
h
->
rects
[
object_id
]
->
nb_colors
<=
16
)
{
/* 4 bpp, standard encoding */
dvb_encode_rle
=
dvb_encode_rle4
;
}
else
if
(
h
->
rects
[
object_id
]
->
nb_colors
<=
256
)
{
/* 8 bpp, standard encoding */
dvb_encode_rle
=
dvb_encode_rle8
;
}
else
{
return
-
1
;
}
...
...
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