FFmpeg: libswscale/options.c Source File

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libswscale

options.c

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1 /*

3 *

4 * This file is part of FFmpeg.

5 *

6 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software

18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

19 */

21 #include "libavutil/opt.h"

22 #include "swscale.h"

23 #include "swscale_internal.h"

25 static const char *sws_context_to_name(void *ptr)

26 {

27 return "swscaler";

28 }

30 #define OFFSET(x) offsetof(SwsContext, x)

31 #define DEFAULT 0

32 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

34 static const AVOption swscale_options[] = {

35 { "sws_flags", "scaler flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, { .i64 = SWS_BICUBIC }, 0, UINT_MAX, VE, .unit = "sws_flags" },

36 { "fast_bilinear", "fast bilinear", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_FAST_BILINEAR }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

37 { "bilinear", "bilinear", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_BILINEAR }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

38 { "bicubic", "bicubic", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_BICUBIC }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

39 { "experimental", "experimental", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_X }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

40 { "neighbor", "nearest neighbor", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_POINT }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

41 { "area", "averaging area", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_AREA }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

42 { "bicublin", "luma bicubic, chroma bilinear", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_BICUBLIN }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

43 { "gauss", "Gaussian", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_GAUSS }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

44 { "sinc", "sinc", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_SINC }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

45 { "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_LANCZOS }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

46 { "spline", "natural bicubic spline", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_SPLINE }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

47 { "print_info", "print info", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_PRINT_INFO }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

48 { "accurate_rnd", "accurate rounding", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_ACCURATE_RND }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

49 { "full_chroma_int", "full chroma interpolation", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_FULL_CHR_H_INT }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

50 { "full_chroma_inp", "full chroma input", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_FULL_CHR_H_INP }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

51 { "bitexact", "", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_BITEXACT }, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

52 { "error_diffusion", "error diffusion dither", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_ERROR_DIFFUSION}, INT_MIN, INT_MAX, VE, .unit = "sws_flags" },

54 { "srcw", "source width", OFFSET(srcW), AV_OPT_TYPE_INT, { .i64 = 16 }, 1, INT_MAX, VE },

55 { "srch", "source height", OFFSET(srcH), AV_OPT_TYPE_INT, { .i64 = 16 }, 1, INT_MAX, VE },

56 { "dstw", "destination width", OFFSET(dstW), AV_OPT_TYPE_INT, { .i64 = 16 }, 1, INT_MAX, VE },

57 { "dsth", "destination height", OFFSET(dstH), AV_OPT_TYPE_INT, { .i64 = 16 }, 1, INT_MAX, VE },

58 { "src_format", "source format", OFFSET(srcFormat), AV_OPT_TYPE_PIXEL_FMT,{ .i64 = DEFAULT }, 0, INT_MAX, VE },

59 { "dst_format", "destination format", OFFSET(dstFormat), AV_OPT_TYPE_PIXEL_FMT,{ .i64 = DEFAULT }, 0, INT_MAX, VE },

60 { "src_range", "source is full range", OFFSET(srcRange), AV_OPT_TYPE_BOOL, { .i64 = DEFAULT }, 0, 1, VE },

61 { "dst_range", "destination is full range", OFFSET(dstRange), AV_OPT_TYPE_BOOL, { .i64 = DEFAULT }, 0, 1, VE },

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

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

65 { "src_v_chr_pos", "source vertical chroma position in luma grid/256" , OFFSET(src_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513 }, -513, 1024, VE },

66 { "src_h_chr_pos", "source horizontal chroma position in luma grid/256", OFFSET(src_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513 }, -513, 1024, VE },

67 { "dst_v_chr_pos", "destination vertical chroma position in luma grid/256" , OFFSET(dst_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513 }, -513, 1024, VE },

68 { "dst_h_chr_pos", "destination horizontal chroma position in luma grid/256", OFFSET(dst_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513 }, -513, 1024, VE },

70 { "sws_dither", "set dithering algorithm", OFFSET(dither), AV_OPT_TYPE_INT, { .i64 = SWS_DITHER_AUTO }, 0, NB_SWS_DITHER, VE, .unit = "sws_dither" },

71 { "auto", "leave choice to sws", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_DITHER_AUTO }, INT_MIN, INT_MAX, VE, .unit = "sws_dither" },

72 { "bayer", "bayer dither", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_DITHER_BAYER }, INT_MIN, INT_MAX, VE, .unit = "sws_dither" },

73 { "ed", "error diffusion", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_DITHER_ED }, INT_MIN, INT_MAX, VE, .unit = "sws_dither" },

74 { "a_dither", "arithmetic addition dither", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_DITHER_A_DITHER}, INT_MIN, INT_MAX, VE, .unit = "sws_dither" },

75 { "x_dither", "arithmetic xor dither", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_DITHER_X_DITHER}, INT_MIN, INT_MAX, VE, .unit = "sws_dither" },

76 { "gamma", "gamma correct scaling", OFFSET(gamma_flag),AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },

77 { "alphablend", "mode for alpha -> non alpha", OFFSET(alphablend),AV_OPT_TYPE_INT, { .i64 = SWS_ALPHA_BLEND_NONE}, 0, SWS_ALPHA_BLEND_NB-1, VE, .unit = "alphablend" },

78 { "none", "ignore alpha", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_ALPHA_BLEND_NONE}, INT_MIN, INT_MAX, VE, .unit = "alphablend" },

79 { "uniform_color", "blend onto a uniform color", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_ALPHA_BLEND_UNIFORM},INT_MIN, INT_MAX, VE, .unit = "alphablend" },

80 { "checkerboard", "blend onto a checkerboard", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_ALPHA_BLEND_CHECKERBOARD},INT_MIN, INT_MAX, VE, .unit = "alphablend" },

82 { "threads", "number of threads", OFFSET(nb_threads), AV_OPT_TYPE_INT, {.i64 = 1 }, 0, INT_MAX, VE, .unit = "threads" },

83 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, .flags = VE, .unit = "threads" },

85 { NULL }

86 };

88 const AVClass ff_sws_context_class = {

89 .class_name = "SWScaler",

90 .item_name = sws_context_to_name,

91 .option = swscale_options,

92 .parent_log_context_offset = OFFSET(parent),

93 .category = AV_CLASS_CATEGORY_SWSCALER,

94 .version = LIBAVUTIL_VERSION_INT,

95 };