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libswscale/options.c

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00001 /*
00002  * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
00003  *
00004  * This file is part of Libav.
00005  *
00006  * Libav is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * Libav is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with Libav; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00021 #include "libavutil/avutil.h"
00022 #include "libavutil/pixfmt.h"
00023 #include "libavutil/opt.h"
00024 #include "swscale.h"
00025 #include "swscale_internal.h"
00026 
00027 static const char * sws_context_to_name(void * ptr)
00028 {
00029     return "swscaler";
00030 }
00031 
00032 #define OFFSET(x) offsetof(SwsContext, x)
00033 #define DEFAULT 0
00034 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
00035 
00036 static const AVOption options[] = {
00037     { "sws_flags", "scaler/cpu flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.dbl = DEFAULT }, 0, UINT_MAX, VE, "sws_flags" },
00038     { "fast_bilinear", "fast bilinear", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_FAST_BILINEAR }, INT_MIN, INT_MAX, VE, "sws_flags" },
00039     { "bilinear", "bilinear", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_BILINEAR }, INT_MIN, INT_MAX, VE, "sws_flags" },
00040     { "bicubic", "bicubic", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_BICUBIC }, INT_MIN, INT_MAX, VE, "sws_flags" },
00041     { "experimental", "experimental", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_X }, INT_MIN, INT_MAX, VE, "sws_flags" },
00042     { "neighbor", "nearest neighbor", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_POINT }, INT_MIN, INT_MAX, VE, "sws_flags" },
00043     { "area", "averaging area", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_AREA }, INT_MIN, INT_MAX, VE, "sws_flags" },
00044     { "bicublin", "luma bicubic, chroma bilinear", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_BICUBLIN }, INT_MIN, INT_MAX, VE, "sws_flags" },
00045     { "gauss", "gaussian", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_GAUSS }, INT_MIN, INT_MAX, VE, "sws_flags" },
00046     { "sinc", "sinc", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_SINC }, INT_MIN, INT_MAX, VE, "sws_flags" },
00047     { "lanczos", "lanczos", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_LANCZOS }, INT_MIN, INT_MAX, VE, "sws_flags" },
00048     { "spline", "natural bicubic spline", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_SPLINE }, INT_MIN, INT_MAX, VE, "sws_flags" },
00049     { "print_info", "print info", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_PRINT_INFO }, INT_MIN, INT_MAX, VE, "sws_flags" },
00050     { "accurate_rnd", "accurate rounding", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_ACCURATE_RND }, INT_MIN, INT_MAX, VE, "sws_flags" },
00051     { "full_chroma_int", "full chroma interpolation", 0 , AV_OPT_TYPE_CONST, {.dbl = SWS_FULL_CHR_H_INT }, INT_MIN, INT_MAX, VE, "sws_flags" },
00052     { "full_chroma_inp", "full chroma input", 0 , AV_OPT_TYPE_CONST, {.dbl = SWS_FULL_CHR_H_INP }, INT_MIN, INT_MAX, VE, "sws_flags" },
00053     { "bitexact", "", 0 , AV_OPT_TYPE_CONST, {.dbl = SWS_BITEXACT }, INT_MIN, INT_MAX, VE, "sws_flags" },
00054 
00055     { "srcw", "source width"      , OFFSET(srcW), AV_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE },
00056     { "srch", "source height"     , OFFSET(srcH), AV_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE },
00057     { "dstw", "destination width" , OFFSET(dstW), AV_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE },
00058     { "dsth", "destination height", OFFSET(dstH), AV_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE },
00059     { "src_format", "source format"     , OFFSET(srcFormat), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, PIX_FMT_NB-1, VE },
00060     { "dst_format", "destination format", OFFSET(dstFormat), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, PIX_FMT_NB-1, VE },
00061     { "src_range" , "source range"      , OFFSET(srcRange) , AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, 1, VE },
00062     { "dst_range" , "destination range" , OFFSET(dstRange) , AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, 1, VE },
00063     { "param0" , "scaler param 0" , OFFSET(param[0]) , AV_OPT_TYPE_DOUBLE, {.dbl = SWS_PARAM_DEFAULT}, INT_MIN, INT_MAX, VE },
00064     { "param1" , "scaler param 1" , OFFSET(param[1]) , AV_OPT_TYPE_DOUBLE, {.dbl = SWS_PARAM_DEFAULT}, INT_MIN, INT_MAX, VE },
00065 
00066     { NULL }
00067 };
00068 
00069 const AVClass sws_context_class = { "SWScaler", sws_context_to_name, options };
00070 
00071 const AVClass *sws_get_class(void)
00072 {
00073     return &sws_context_class;
00074 }
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