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Linshizhi
ffmpeg.wasm-core
Commits
6adf97fe
Commit
6adf97fe
authored
Nov 21, 2012
by
Michael Niedermayer
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avcodec_get_pix_fmt_loss: remove PixFmtInfo use
Signed-off-by:
Michael Niedermayer
<
michaelni@gmx.at
>
parent
fc04c99d
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1 changed file
with
34 additions
and
17 deletions
+34
-17
imgconvert.c
libavcodec/imgconvert.c
+34
-17
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libavcodec/imgconvert.c
View file @
6adf97fe
...
...
@@ -433,6 +433,22 @@ void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int
*
v_shift
=
desc
->
log2_chroma_h
;
}
static
get_color_type
(
AVPixFmtDescriptor
*
desc
)
{
if
(
desc
->
nb_components
==
1
||
desc
->
nb_components
==
2
)
return
FF_COLOR_GRAY
;
if
(
desc
->
name
&&
!
strncmp
(
desc
->
name
,
"yuvj"
,
4
))
return
FF_COLOR_YUV_JPEG
;
if
(
desc
->
flags
&
PIX_FMT_RGB
)
return
FF_COLOR_RGB
;
if
(
desc
->
nb_components
==
0
)
return
0
;
return
FF_COLOR_YUV
;
}
static
int
get_pix_fmt_depth
(
int
*
min
,
int
*
max
,
enum
AVPixelFormat
pix_fmt
)
{
const
AVPixFmtDescriptor
*
desc
=
av_pix_fmt_desc_get
(
pix_fmt
);
...
...
@@ -454,17 +470,15 @@ static int get_pix_fmt_depth(int *min, int *max, enum AVPixelFormat pix_fmt)
int
avcodec_get_pix_fmt_loss
(
enum
AVPixelFormat
dst_pix_fmt
,
enum
AVPixelFormat
src_pix_fmt
,
int
has_alpha
)
{
const
PixFmtInfo
*
pf
,
*
ps
;
const
AVPixFmtDescriptor
*
src_desc
=
av_pix_fmt_desc_get
(
src_pix_fmt
);
const
AVPixFmtDescriptor
*
dst_desc
=
av_pix_fmt_desc_get
(
dst_pix_fmt
);
int
src_color
,
dst_color
;
int
src_min_depth
,
src_max_depth
,
dst_min_depth
,
dst_max_depth
;
int
ret
,
loss
;
if
(
dst_pix_fmt
>=
AV_PIX_FMT_NB
||
dst_pix_fmt
<=
AV_PIX_FMT_NONE
)
return
~
0
;
ps
=
&
pix_fmt_info
[
src_pix_fmt
];
/* compute loss */
loss
=
0
;
...
...
@@ -472,6 +486,10 @@ int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat
return
ret
;
if
((
ret
=
get_pix_fmt_depth
(
&
dst_min_depth
,
&
dst_max_depth
,
dst_pix_fmt
))
<
0
)
return
ret
;
src_color
=
get_color_type
(
src_desc
);
dst_color
=
get_color_type
(
dst_desc
);
if
(
dst_min_depth
<
src_min_depth
||
dst_max_depth
<
src_max_depth
)
loss
|=
FF_LOSS_DEPTH
;
...
...
@@ -479,40 +497,39 @@ int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat
dst_desc
->
log2_chroma_h
>
src_desc
->
log2_chroma_h
)
loss
|=
FF_LOSS_RESOLUTION
;
pf
=
&
pix_fmt_info
[
dst_pix_fmt
];
switch
(
pf
->
color_type
)
{
switch
(
dst_color
)
{
case
FF_COLOR_RGB
:
if
(
ps
->
color_type
!=
FF_COLOR_RGB
&&
ps
->
color_type
!=
FF_COLOR_GRAY
)
if
(
src_color
!=
FF_COLOR_RGB
&&
src_color
!=
FF_COLOR_GRAY
)
loss
|=
FF_LOSS_COLORSPACE
;
break
;
case
FF_COLOR_GRAY
:
if
(
ps
->
color_type
!=
FF_COLOR_GRAY
)
if
(
src_color
!=
FF_COLOR_GRAY
)
loss
|=
FF_LOSS_COLORSPACE
;
break
;
case
FF_COLOR_YUV
:
if
(
ps
->
color_type
!=
FF_COLOR_YUV
)
if
(
src_color
!=
FF_COLOR_YUV
)
loss
|=
FF_LOSS_COLORSPACE
;
break
;
case
FF_COLOR_YUV_JPEG
:
if
(
ps
->
color_type
!=
FF_COLOR_YUV_JPEG
&&
ps
->
color_type
!=
FF_COLOR_YUV
&&
ps
->
color_type
!=
FF_COLOR_GRAY
)
if
(
src_color
!=
FF_COLOR_YUV_JPEG
&&
src_color
!=
FF_COLOR_YUV
&&
src_color
!=
FF_COLOR_GRAY
)
loss
|=
FF_LOSS_COLORSPACE
;
break
;
default:
/* fail safe test */
if
(
ps
->
color_type
!=
pf
->
color_type
)
if
(
src_color
!=
dst_color
)
loss
|=
FF_LOSS_COLORSPACE
;
break
;
}
if
(
pf
->
color_type
==
FF_COLOR_GRAY
&&
ps
->
color_type
!=
FF_COLOR_GRAY
)
if
(
dst_color
==
FF_COLOR_GRAY
&&
src_color
!=
FF_COLOR_GRAY
)
loss
|=
FF_LOSS_CHROMA
;
if
(
!
pixdesc_has_alpha
(
dst_desc
)
&&
(
pixdesc_has_alpha
(
src_desc
)
&&
has_alpha
))
loss
|=
FF_LOSS_ALPHA
;
if
(
dst_pix_fmt
==
AV_PIX_FMT_PAL8
&&
(
src_pix_fmt
!=
AV_PIX_FMT_PAL8
&&
(
ps
->
color_type
!=
FF_COLOR_GRAY
||
(
pixdesc_has_alpha
(
src_desc
)
&&
has_alpha
))))
(
src_pix_fmt
!=
AV_PIX_FMT_PAL8
&&
(
src_color
!=
FF_COLOR_GRAY
||
(
pixdesc_has_alpha
(
src_desc
)
&&
has_alpha
))))
loss
|=
FF_LOSS_COLORQUANT
;
return
loss
;
...
...
@@ -986,7 +1003,7 @@ int main(void){
AVPixFmtDescriptor
*
desc
=
av_pix_fmt_desc_get
(
i
);
if
(
!
desc
)
continue
;
av_log
(
0
,
AV_LOG_INFO
,
"pix fmt %s yuv_plan:%d avg_bpp:%d colortype:%d
\n
"
,
desc
->
name
,
is_yuv_planar
(
i
),
avg_bits_per_pixel
(
i
),
pix_fmt_info
[
i
].
color_type
);
av_log
(
0
,
AV_LOG_INFO
,
"pix fmt %s yuv_plan:%d avg_bpp:%d colortype:%d
\n
"
,
desc
->
name
,
is_yuv_planar
(
i
),
avg_bits_per_pixel
(
i
),
get_color_type
(
desc
)
);
}
return
0
;
}
...
...
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