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Linshizhi
ffmpeg.wasm-core
Commits
7016aa65
Commit
7016aa65
authored
Nov 29, 2012
by
Peter Ross
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Plain Diff
iff decoder: support RGB8 and RGBN
parent
53ae32d3
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1 changed file
with
70 additions
and
1 deletion
+70
-1
iff.c
libavcodec/iff.c
+70
-1
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libavcodec/iff.c
View file @
7016aa65
...
...
@@ -335,7 +335,11 @@ static av_cold int decode_init(AVCodecContext *avctx)
avctx
->
pix_fmt
=
(
avctx
->
bits_per_coded_sample
<
8
)
||
(
avctx
->
extradata_size
>=
2
&&
palette_size
)
?
AV_PIX_FMT_PAL8
:
AV_PIX_FMT_GRAY8
;
}
else
if
(
avctx
->
bits_per_coded_sample
<=
32
)
{
if
(
avctx
->
codec_tag
!=
MKTAG
(
'D'
,
'E'
,
'E'
,
'P'
))
{
if
(
avctx
->
codec_tag
==
MKTAG
(
'R'
,
'G'
,
'B'
,
'8'
))
{
avctx
->
pix_fmt
=
AV_PIX_FMT_RGB32
;
}
else
if
(
avctx
->
codec_tag
==
MKTAG
(
'R'
,
'G'
,
'B'
,
'N'
))
{
avctx
->
pix_fmt
=
AV_PIX_FMT_RGB444
;
}
else
if
(
avctx
->
codec_tag
!=
MKTAG
(
'D'
,
'E'
,
'E'
,
'P'
))
{
if
(
avctx
->
bits_per_coded_sample
==
24
)
{
avctx
->
pix_fmt
=
AV_PIX_FMT_RGB0
;
}
else
if
(
avctx
->
bits_per_coded_sample
==
32
)
{
...
...
@@ -484,6 +488,61 @@ static int decode_byterun(uint8_t *dst, int dst_size,
return
buf
-
buf_start
;
}
#define DECODE_RGBX_COMMON(pixel_size) \
if (!length) { \
length = bytestream2_get_byte(gb); \
if (!length) { \
length = bytestream2_get_be16(gb); \
if (!length) \
return; \
} \
} \
for (i = 0; i < length; i++) { \
*(uint32_t *)(dst + y*linesize + x * pixel_size) = pixel; \
x += 1; \
if (x >= width) { \
y += 1; \
if (y >= height) \
return; \
x = 0; \
} \
}
/**
* Decode RGB8 buffer
* @param[out] dst Destination buffer
* @param width Width of destination buffer (pixels)
* @param height Height of destination buffer (pixels)
* @param linesize Line size of destination buffer (bytes)
*/
static
void
decode_rgb8
(
GetByteContext
*
gb
,
uint8_t
*
dst
,
int
width
,
int
height
,
int
linesize
)
{
int
x
=
0
,
y
=
0
,
i
,
length
;
while
(
bytestream2_get_bytes_left
(
gb
)
>=
4
)
{
uint32_t
pixel
=
0xFF000000
|
bytestream2_get_be24
(
gb
);
length
=
bytestream2_get_byte
(
gb
)
&
0x7F
;
DECODE_RGBX_COMMON
(
4
)
}
}
/**
* Decode RGBN buffer
* @param[out] dst Destination buffer
* @param width Width of destination buffer (pixels)
* @param height Height of destination buffer (pixels)
* @param linesize Line size of destination buffer (bytes)
*/
static
void
decode_rgbn
(
GetByteContext
*
gb
,
uint8_t
*
dst
,
int
width
,
int
height
,
int
linesize
)
{
int
x
=
0
,
y
=
0
,
i
,
length
;
while
(
bytestream2_get_bytes_left
(
gb
)
>=
2
)
{
uint32_t
pixel
=
bytestream2_get_be16u
(
gb
);
length
=
pixel
&
0x7
;
pixel
>>=
4
;
DECODE_RGBX_COMMON
(
2
)
}
}
/**
* Decode DEEP RLE 32-bit buffer
* @param[out] dst Destination buffer
...
...
@@ -599,6 +658,7 @@ static int decode_frame(AVCodecContext *avctx,
const
int
buf_size
=
avpkt
->
size
>=
2
?
avpkt
->
size
-
AV_RB16
(
avpkt
->
data
)
:
0
;
const
uint8_t
*
buf_end
=
buf
+
buf_size
;
int
y
,
plane
,
res
;
GetByteContext
gb
;
if
((
res
=
extract_header
(
avctx
,
avpkt
))
<
0
)
return
res
;
...
...
@@ -770,6 +830,15 @@ static int decode_frame(AVCodecContext *avctx,
return
unsupported
(
avctx
);
}
break
;
case
4
:
bytestream2_init
(
&
gb
,
buf
,
buf_size
);
if
(
avctx
->
codec_tag
==
MKTAG
(
'R'
,
'G'
,
'B'
,
'8'
))
decode_rgb8
(
&
gb
,
s
->
frame
.
data
[
0
],
avctx
->
width
,
avctx
->
height
,
s
->
frame
.
linesize
[
0
]);
else
if
(
avctx
->
codec_tag
==
MKTAG
(
'R'
,
'G'
,
'B'
,
'N'
))
decode_rgbn
(
&
gb
,
s
->
frame
.
data
[
0
],
avctx
->
width
,
avctx
->
height
,
s
->
frame
.
linesize
[
0
]);
else
return
unsupported
(
avctx
);
break
;
case
5
:
if
(
avctx
->
codec_tag
==
MKTAG
(
'D'
,
'E'
,
'E'
,
'P'
))
{
const
AVPixFmtDescriptor
*
desc
=
av_pix_fmt_desc_get
(
avctx
->
pix_fmt
);
...
...
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