swscale: fix gbrap to gbrap alpha scaling
[ffmpeg.git] / libswscale / options.c
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/opt.h"
23 #include "libavutil/pixfmt.h"
24 #include "swscale.h"
25 #include "swscale_internal.h"
26
27 static 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
36 static const AVOption swscale_options[] = {
37     { "sws_flags",       "scaler flags",                  OFFSET(flags),     AV_OPT_TYPE_FLAGS,  { .i64 = DEFAULT            }, 0,       UINT_MAX,       VE, "sws_flags" },
38     { "fast_bilinear",   "fast bilinear",                 0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_FAST_BILINEAR  }, INT_MIN, INT_MAX,        VE, "sws_flags" },
39     { "bilinear",        "bilinear",                      0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_BILINEAR       }, INT_MIN, INT_MAX,        VE, "sws_flags" },
40     { "bicubic",         "bicubic",                       0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_BICUBIC        }, INT_MIN, INT_MAX,        VE, "sws_flags" },
41     { "experimental",    "experimental",                  0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_X              }, INT_MIN, INT_MAX,        VE, "sws_flags" },
42     { "neighbor",        "nearest neighbor",              0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_POINT          }, INT_MIN, INT_MAX,        VE, "sws_flags" },
43     { "area",            "averaging area",                0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_AREA           }, INT_MIN, INT_MAX,        VE, "sws_flags" },
44     { "bicublin",        "luma bicubic, chroma bilinear", 0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_BICUBLIN       }, INT_MIN, INT_MAX,        VE, "sws_flags" },
45     { "gauss",           "gaussian",                      0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_GAUSS          }, INT_MIN, INT_MAX,        VE, "sws_flags" },
46     { "sinc",            "sinc",                          0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_SINC           }, INT_MIN, INT_MAX,        VE, "sws_flags" },
47     { "lanczos",         "lanczos",                       0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_LANCZOS        }, INT_MIN, INT_MAX,        VE, "sws_flags" },
48     { "spline",          "natural bicubic spline",        0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_SPLINE         }, INT_MIN, INT_MAX,        VE, "sws_flags" },
49     { "print_info",      "print info",                    0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_PRINT_INFO     }, INT_MIN, INT_MAX,        VE, "sws_flags" },
50     { "accurate_rnd",    "accurate rounding",             0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_ACCURATE_RND   }, INT_MIN, INT_MAX,        VE, "sws_flags" },
51     { "full_chroma_int", "full chroma interpolation",     0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_FULL_CHR_H_INT }, INT_MIN, INT_MAX,        VE, "sws_flags" },
52     { "full_chroma_inp", "full chroma input",             0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_FULL_CHR_H_INP }, INT_MIN, INT_MAX,        VE, "sws_flags" },
53     { "bitexact",        "",                              0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_BITEXACT       }, INT_MIN, INT_MAX,        VE, "sws_flags" },
54
55     { "srcw",            "source width",                  OFFSET(srcW),      AV_OPT_TYPE_INT,    { .i64 = 16                 }, 1,       INT_MAX,        VE },
56     { "srch",            "source height",                 OFFSET(srcH),      AV_OPT_TYPE_INT,    { .i64 = 16                 }, 1,       INT_MAX,        VE },
57     { "dstw",            "destination width",             OFFSET(dstW),      AV_OPT_TYPE_INT,    { .i64 = 16                 }, 1,       INT_MAX,        VE },
58     { "dsth",            "destination height",            OFFSET(dstH),      AV_OPT_TYPE_INT,    { .i64 = 16                 }, 1,       INT_MAX,        VE },
59     { "src_format",      "source format",                 OFFSET(srcFormat), AV_OPT_TYPE_INT,    { .i64 = DEFAULT            }, 0,       AV_PIX_FMT_NB - 1, VE },
60     { "dst_format",      "destination format",            OFFSET(dstFormat), AV_OPT_TYPE_INT,    { .i64 = DEFAULT            }, 0,       AV_PIX_FMT_NB - 1, VE },
61     { "src_range",       "source range",                  OFFSET(srcRange),  AV_OPT_TYPE_INT,    { .i64 = DEFAULT            }, 0,       1,              VE },
62     { "dst_range",       "destination range",             OFFSET(dstRange),  AV_OPT_TYPE_INT,    { .i64 = 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
69 const AVClass sws_context_class = { "SWScaler", sws_context_to_name, swscale_options };
70
71 const AVClass *sws_get_class(void)
72 {
73     return &sws_context_class;
74 }