/*
  * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "libavutil/avutil.h"

 #include "libavutil/pixfmt.h"

 #include "libavutil/opt.h"

 #include "swscale.h"
 #include "swscale_internal.h"
 

 static const char * sws_context_to_name(void * ptr)
 {

     return "swscaler";
 }
 
 #define OFFSET(x) offsetof(SwsContext, x)
 #define DEFAULT 0
 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 
 static const AVOption options[] = {

     { "sws_flags", "scaler/cpu flags", OFFSET(flags), FF_OPT_TYPE_FLAGS, {.dbl = DEFAULT }, 0, UINT_MAX, VE, "sws_flags" },
     { "fast_bilinear", "fast bilinear", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_FAST_BILINEAR }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "bilinear", "bilinear", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_BILINEAR }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "bicubic", "bicubic", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_BICUBIC }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "experimental", "experimental", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_X }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "neighbor", "nearest neighbor", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_POINT }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "area", "averaging area", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_AREA }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "bicublin", "luma bicubic, chroma bilinear", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_BICUBLIN }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "gauss", "gaussian", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_GAUSS }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "sinc", "sinc", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_SINC }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "lanczos", "lanczos", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_LANCZOS }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "spline", "natural bicubic spline", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_SPLINE }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "print_info", "print info", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_PRINT_INFO }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "accurate_rnd", "accurate rounding", 0, FF_OPT_TYPE_CONST, {.dbl = SWS_ACCURATE_RND }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "full_chroma_int", "full chroma interpolation", 0 , FF_OPT_TYPE_CONST, {.dbl = SWS_FULL_CHR_H_INT }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "full_chroma_inp", "full chroma input", 0 , FF_OPT_TYPE_CONST, {.dbl = SWS_FULL_CHR_H_INP }, INT_MIN, INT_MAX, VE, "sws_flags" },
     { "bitexact", "", 0 , FF_OPT_TYPE_CONST, {.dbl = SWS_BITEXACT }, INT_MIN, INT_MAX, VE, "sws_flags" },

     { "srcw", "source width"      , OFFSET(srcW), FF_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE },
     { "srch", "source height"     , OFFSET(srcH), FF_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE },
     { "dstw", "destination width" , OFFSET(dstW), FF_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE },
     { "dsth", "destination height", OFFSET(dstH), FF_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE },
     { "src_format", "source format"     , OFFSET(srcFormat), FF_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, PIX_FMT_NB-1, VE },
     { "dst_format", "destination format", OFFSET(dstFormat), FF_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, PIX_FMT_NB-1, VE },
     { "src_range" , "source range"      , OFFSET(srcRange) , FF_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, 1, VE },
     { "dst_range" , "destination range" , OFFSET(dstRange) , FF_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, 1, VE },

     { "param0" , "scaler param 0" , OFFSET(param[0]) , FF_OPT_TYPE_DOUBLE, {.dbl = SWS_PARAM_DEFAULT}, INT_MIN, INT_MAX, VE },
     { "param1" , "scaler param 1" , OFFSET(param[1]) , FF_OPT_TYPE_DOUBLE, {.dbl = SWS_PARAM_DEFAULT}, INT_MIN, INT_MAX, VE },

     { NULL }
 };
 
 const AVClass sws_context_class = { "SWScaler", sws_context_to_name, options };