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libswscale
options.c
Go to the documentation of this file.
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/*
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* Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "
libavutil/avutil.h
"
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#include "
libavutil/opt.h
"
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#include "
libavutil/pixfmt.h
"
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#include "
swscale.h
"
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#include "
swscale_internal.h
"
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static
const
char
*
sws_context_to_name
(
void
*ptr)
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{
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return
"swscaler"
;
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}
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#define OFFSET(x) offsetof(SwsContext, x)
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#define DEFAULT 0
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#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
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static
const
AVOption
options
[] = {
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{
"sws_flags"
,
"scaler flags"
,
OFFSET
(
flags
),
AV_OPT_TYPE_FLAGS
, { .i64 =
DEFAULT
}, 0, UINT_MAX,
VE
,
"sws_flags"
},
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{
"fast_bilinear"
,
"fast bilinear"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_FAST_BILINEAR
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"bilinear"
,
"bilinear"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_BILINEAR
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"bicubic"
,
"bicubic"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_BICUBIC
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"experimental"
,
"experimental"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_X
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"neighbor"
,
"nearest neighbor"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_POINT
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"area"
,
"averaging area"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_AREA
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"bicublin"
,
"luma bicubic, chroma bilinear"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_BICUBLIN
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"gauss"
,
"gaussian"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_GAUSS
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"sinc"
,
"sinc"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_SINC
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"lanczos"
,
"lanczos"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_LANCZOS
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"spline"
,
"natural bicubic spline"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_SPLINE
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"print_info"
,
"print info"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_PRINT_INFO
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"accurate_rnd"
,
"accurate rounding"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_ACCURATE_RND
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"full_chroma_int"
,
"full chroma interpolation"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_FULL_CHR_H_INT
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"full_chroma_inp"
,
"full chroma input"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_FULL_CHR_H_INP
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"bitexact"
,
""
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_BITEXACT
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"error_diffusion"
,
"error diffusion dither"
, 0,
AV_OPT_TYPE_CONST
, { .i64 =
SWS_ERROR_DIFFUSION
}, INT_MIN, INT_MAX,
VE
,
"sws_flags"
},
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{
"srcw"
,
"source width"
,
OFFSET
(srcW),
AV_OPT_TYPE_INT
, { .i64 = 16 }, 1, INT_MAX,
VE
},
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{
"srch"
,
"source height"
,
OFFSET
(srcH),
AV_OPT_TYPE_INT
, { .i64 = 16 }, 1, INT_MAX,
VE
},
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{
"dstw"
,
"destination width"
,
OFFSET
(dstW),
AV_OPT_TYPE_INT
, { .i64 = 16 }, 1, INT_MAX,
VE
},
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{
"dsth"
,
"destination height"
,
OFFSET
(dstH),
AV_OPT_TYPE_INT
, { .i64 = 16 }, 1, INT_MAX,
VE
},
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{
"src_format"
,
"source format"
,
OFFSET
(srcFormat),
AV_OPT_TYPE_INT
, { .i64 =
DEFAULT
}, 0,
AV_PIX_FMT_NB
- 1,
VE
},
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{
"dst_format"
,
"destination format"
,
OFFSET
(dstFormat),
AV_OPT_TYPE_INT
, { .i64 =
DEFAULT
}, 0,
AV_PIX_FMT_NB
- 1,
VE
},
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{
"src_range"
,
"source range"
,
OFFSET
(srcRange),
AV_OPT_TYPE_INT
, { .i64 =
DEFAULT
}, 0, 1,
VE
},
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{
"dst_range"
,
"destination range"
,
OFFSET
(dstRange),
AV_OPT_TYPE_INT
, { .i64 =
DEFAULT
}, 0, 1,
VE
},
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{
"param0"
,
"scaler param 0"
,
OFFSET
(param[0]),
AV_OPT_TYPE_DOUBLE
, { .dbl =
SWS_PARAM_DEFAULT
}, INT_MIN, INT_MAX,
VE
},
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{
"param1"
,
"scaler param 1"
,
OFFSET
(param[1]),
AV_OPT_TYPE_DOUBLE
, { .dbl =
SWS_PARAM_DEFAULT
}, INT_MIN, INT_MAX,
VE
},
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{ NULL }
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};
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const
AVClass
sws_context_class
= {
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.
class_name
=
"SWScaler"
,
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.item_name =
sws_context_to_name
,
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.option =
options
,
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.category =
AV_CLASS_CATEGORY_SWSCALER
,
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.version =
LIBAVUTIL_VERSION_INT
,
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};
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const
AVClass
*
sws_get_class
(
void
)
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{
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return
&
sws_context_class
;
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}
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