1/* 2 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of Libav. 5 * 6 * Libav is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * Libav is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with Libav; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#include "libavutil/avutil.h" 22#include "libavutil/pixfmt.h" 23#include "libavutil/opt.h" 24#include "swscale.h" 25#include "swscale_internal.h" 26 27static const char * sws_context_to_name(void * ptr) 28{ 29 return "swscaler"; 30} 31 32#define OFFSET(x) offsetof(SwsContext, x) 33#define DEFAULT 0 34#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM 35 36static const AVOption options[] = { 37 { "sws_flags", "scaler/cpu flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.dbl = DEFAULT }, 0, UINT_MAX, VE, "sws_flags" }, 38 { "fast_bilinear", "fast bilinear", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_FAST_BILINEAR }, INT_MIN, INT_MAX, VE, "sws_flags" }, 39 { "bilinear", "bilinear", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_BILINEAR }, INT_MIN, INT_MAX, VE, "sws_flags" }, 40 { "bicubic", "bicubic", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_BICUBIC }, INT_MIN, INT_MAX, VE, "sws_flags" }, 41 { "experimental", "experimental", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_X }, INT_MIN, INT_MAX, VE, "sws_flags" }, 42 { "neighbor", "nearest neighbor", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_POINT }, INT_MIN, INT_MAX, VE, "sws_flags" }, 43 { "area", "averaging area", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_AREA }, INT_MIN, INT_MAX, VE, "sws_flags" }, 44 { "bicublin", "luma bicubic, chroma bilinear", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_BICUBLIN }, INT_MIN, INT_MAX, VE, "sws_flags" }, 45 { "gauss", "gaussian", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_GAUSS }, INT_MIN, INT_MAX, VE, "sws_flags" }, 46 { "sinc", "sinc", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_SINC }, INT_MIN, INT_MAX, VE, "sws_flags" }, 47 { "lanczos", "lanczos", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_LANCZOS }, INT_MIN, INT_MAX, VE, "sws_flags" }, 48 { "spline", "natural bicubic spline", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_SPLINE }, INT_MIN, INT_MAX, VE, "sws_flags" }, 49 { "print_info", "print info", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_PRINT_INFO }, INT_MIN, INT_MAX, VE, "sws_flags" }, 50 { "accurate_rnd", "accurate rounding", 0, AV_OPT_TYPE_CONST, {.dbl = SWS_ACCURATE_RND }, INT_MIN, INT_MAX, VE, "sws_flags" }, 51 { "full_chroma_int", "full chroma interpolation", 0 , AV_OPT_TYPE_CONST, {.dbl = SWS_FULL_CHR_H_INT }, INT_MIN, INT_MAX, VE, "sws_flags" }, 52 { "full_chroma_inp", "full chroma input", 0 , AV_OPT_TYPE_CONST, {.dbl = SWS_FULL_CHR_H_INP }, INT_MIN, INT_MAX, VE, "sws_flags" }, 53 { "bitexact", "", 0 , AV_OPT_TYPE_CONST, {.dbl = SWS_BITEXACT }, INT_MIN, INT_MAX, VE, "sws_flags" }, 54 55 { "srcw", "source width" , OFFSET(srcW), AV_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE }, 56 { "srch", "source height" , OFFSET(srcH), AV_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE }, 57 { "dstw", "destination width" , OFFSET(dstW), AV_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE }, 58 { "dsth", "destination height", OFFSET(dstH), AV_OPT_TYPE_INT, {.dbl = 16 }, 1, INT_MAX, VE }, 59 { "src_format", "source format" , OFFSET(srcFormat), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, PIX_FMT_NB-1, VE }, 60 { "dst_format", "destination format", OFFSET(dstFormat), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, PIX_FMT_NB-1, VE }, 61 { "src_range" , "source range" , OFFSET(srcRange) , AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, 1, VE }, 62 { "dst_range" , "destination range" , OFFSET(dstRange) , AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, 1, VE }, 63 { "param0" , "scaler param 0" , OFFSET(param[0]) , AV_OPT_TYPE_DOUBLE, {.dbl = SWS_PARAM_DEFAULT}, INT_MIN, INT_MAX, VE }, 64 { "param1" , "scaler param 1" , OFFSET(param[1]) , AV_OPT_TYPE_DOUBLE, {.dbl = SWS_PARAM_DEFAULT}, INT_MIN, INT_MAX, VE }, 65 66 { NULL } 67}; 68 69const AVClass sws_context_class = { "SWScaler", sws_context_to_name, options }; 70 71const AVClass *sws_get_class(void) 72{ 73 return &sws_context_class; 74} 75