FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libswresample/options.c
Date: 2026-04-24 19:58:39
Exec Total Coverage
Lines: 9 11 81.8%
Functions: 2 3 66.7%
Branches: 1 2 50.0%
Line Branch Exec Source
1 /*
2 * Copyright (C) 2011-2013 Michael Niedermayer (michaelni@gmx.at)
3 *
4 * This file is part of libswresample
5 *
6 * libswresample 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 * libswresample 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 libswresample; 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/channel_layout.h"
22 #include "libavutil/mem.h"
23 #include "libavutil/opt.h"
24 #include "swresample_internal.h"
25
26 #include <float.h>
27
28 #define C30DB M_SQRT2
29 #define C15DB 1.189207115
30 #define C__0DB 1.0
31 #define C_15DB 0.840896415
32 #define C_30DB M_SQRT1_2
33 #define C_45DB 0.594603558
34 #define C_60DB 0.5
35
36 #define OFFSET(x) offsetof(SwrContext,x)
37 #define PARAM AV_OPT_FLAG_AUDIO_PARAM
38 #define DEPREC AV_OPT_FLAG_DEPRECATED
39
40 static const AVOption options[]={
41 {"isr" , "set input sample rate" , OFFSET( in_sample_rate), AV_OPT_TYPE_INT , {.i64=0 }, 0 , INT_MAX , PARAM},
42 {"in_sample_rate" , "set input sample rate" , OFFSET( in_sample_rate), AV_OPT_TYPE_INT , {.i64=0 }, 0 , INT_MAX , PARAM},
43 {"osr" , "set output sample rate" , OFFSET(out_sample_rate), AV_OPT_TYPE_INT , {.i64=0 }, 0 , INT_MAX , PARAM},
44 {"out_sample_rate" , "set output sample rate" , OFFSET(out_sample_rate), AV_OPT_TYPE_INT , {.i64=0 }, 0 , INT_MAX , PARAM},
45 {"isf" , "set input sample format" , OFFSET( in_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1 , INT_MAX, PARAM},
46 {"in_sample_fmt" , "set input sample format" , OFFSET( in_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1 , INT_MAX, PARAM},
47 {"osf" , "set output sample format" , OFFSET(out_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1 , INT_MAX, PARAM},
48 {"out_sample_fmt" , "set output sample format" , OFFSET(out_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1 , INT_MAX, PARAM},
49 {"tsf" , "set internal sample format" , OFFSET(user_int_sample_fmt), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1 , INT_MAX, PARAM},
50 {"internal_sample_fmt" , "set internal sample format" , OFFSET(user_int_sample_fmt), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1 , INT_MAX, PARAM},
51 {"ichl" , "set input channel layout" , OFFSET(user_in_chlayout ), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, .unit = "chlayout"},
52 {"in_chlayout" , "set input channel layout" , OFFSET(user_in_chlayout ), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, .unit = "chlayout"},
53 {"ochl" , "set output channel layout" , OFFSET(user_out_chlayout), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, .unit = "chlayout"},
54 {"out_chlayout" , "set output channel layout" , OFFSET(user_out_chlayout), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, .unit = "chlayout"},
55 {"uchl" , "set used channel layout" , OFFSET(user_used_chlayout), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, .unit = "chlayout"},
56 {"used_chlayout" , "set used channel layout" , OFFSET(user_used_chlayout), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, .unit = "chlayout"},
57 {"clev" , "set center mix level" , OFFSET(clev ), AV_OPT_TYPE_FLOAT, {.dbl=C_30DB }, -32 , 32 , PARAM},
58 {"center_mix_level" , "set center mix level" , OFFSET(clev ), AV_OPT_TYPE_FLOAT, {.dbl=C_30DB }, -32 , 32 , PARAM},
59 {"slev" , "set surround mix level" , OFFSET(slev ), AV_OPT_TYPE_FLOAT, {.dbl=C_30DB }, -32 , 32 , PARAM},
60 {"surround_mix_level" , "set surround mix Level" , OFFSET(slev ), AV_OPT_TYPE_FLOAT, {.dbl=C_30DB }, -32 , 32 , PARAM},
61 {"lfe_mix_level" , "set LFE mix level" , OFFSET(lfe_mix_level ), AV_OPT_TYPE_FLOAT, {.dbl=0 }, -32 , 32 , PARAM},
62 {"rmvol" , "set rematrix volume" , OFFSET(rematrix_volume), AV_OPT_TYPE_FLOAT, {.dbl=1.0 }, -1000 , 1000 , PARAM},
63 {"rematrix_volume" , "set rematrix volume" , OFFSET(rematrix_volume), AV_OPT_TYPE_FLOAT, {.dbl=1.0 }, -1000 , 1000 , PARAM},
64 {"rematrix_maxval" , "set rematrix maxval" , OFFSET(rematrix_maxval), AV_OPT_TYPE_FLOAT, {.dbl=0.0 }, 0 , 1000 , PARAM},
65
66 {"flags" , "set flags" , OFFSET(flags ), AV_OPT_TYPE_FLAGS, {.i64=0 }, 0 , UINT_MAX , PARAM, .unit = "flags"},
67 {"swr_flags" , "set flags" , OFFSET(flags ), AV_OPT_TYPE_FLAGS, {.i64=0 }, 0 , UINT_MAX , PARAM, .unit = "flags"},
68 {"res" , "force resampling" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_FLAG_RESAMPLE }, INT_MIN, INT_MAX , PARAM, .unit = "flags"},
69
70 {"dither_scale" , "set dither scale" , OFFSET(dither.scale ), AV_OPT_TYPE_FLOAT, {.dbl=1 }, 0 , INT_MAX , PARAM},
71
72 {"dither_method" , "set dither method" , OFFSET(user_dither_method),AV_OPT_TYPE_INT, {.i64=0 }, 0 , SWR_DITHER_NB-1, PARAM, .unit = "dither_method"},
73 {"rectangular" , "select rectangular dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_RECTANGULAR}, INT_MIN, INT_MAX , PARAM, .unit = "dither_method"},
74 {"triangular" , "select triangular dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_TRIANGULAR }, INT_MIN, INT_MAX , PARAM, .unit = "dither_method"},
75 {"triangular_hp" , "select triangular dither with high pass" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_TRIANGULAR_HIGHPASS }, INT_MIN, INT_MAX, PARAM, .unit = "dither_method"},
76 {"lipshitz" , "select Lipshitz noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_LIPSHITZ}, INT_MIN, INT_MAX, PARAM, .unit = "dither_method"},
77 {"shibata" , "select Shibata noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_SHIBATA }, INT_MIN, INT_MAX, PARAM, .unit = "dither_method"},
78 {"low_shibata" , "select low Shibata noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_LOW_SHIBATA }, INT_MIN, INT_MAX, PARAM, .unit = "dither_method"},
79 {"high_shibata" , "select high Shibata noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_HIGH_SHIBATA }, INT_MIN, INT_MAX, PARAM, .unit = "dither_method"},
80 {"f_weighted" , "select f-weighted noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_F_WEIGHTED }, INT_MIN, INT_MAX, PARAM, .unit = "dither_method"},
81 {"modified_e_weighted" , "select modified-e-weighted noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_MODIFIED_E_WEIGHTED }, INT_MIN, INT_MAX, PARAM, .unit = "dither_method"},
82 {"improved_e_weighted" , "select improved-e-weighted noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_IMPROVED_E_WEIGHTED }, INT_MIN, INT_MAX, PARAM, .unit = "dither_method"},
83
84 {"filter_size" , "set swr resampling filter size", OFFSET(filter_size) , AV_OPT_TYPE_INT , {.i64=32 }, 0 , INT_MAX , PARAM },
85 {"phase_shift" , "set swr resampling phase shift", OFFSET(phase_shift) , AV_OPT_TYPE_INT , {.i64=10 }, 0 , 24 , PARAM },
86 {"linear_interp" , "enable linear interpolation" , OFFSET(linear_interp) , AV_OPT_TYPE_BOOL , {.i64=1 }, 0 , 1 , PARAM },
87 {"exact_rational" , "enable exact rational" , OFFSET(exact_rational) , AV_OPT_TYPE_BOOL , {.i64=1 }, 0 , 1 , PARAM },
88 {"cutoff" , "set cutoff frequency ratio" , OFFSET(cutoff) , AV_OPT_TYPE_DOUBLE,{.dbl=0. }, 0 , 1 , PARAM },
89
90 /* duplicate option in order to work with avconv */
91 {"resample_cutoff" , "set cutoff frequency ratio" , OFFSET(cutoff) , AV_OPT_TYPE_DOUBLE,{.dbl=0. }, 0 , 1 , PARAM },
92
93 {"resampler" , "set resampling Engine" , OFFSET(engine) , AV_OPT_TYPE_INT , {.i64=0 }, 0 , SWR_ENGINE_NB-1, PARAM, .unit = "resampler"},
94 {"swr" , "select SW Resampler" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_ENGINE_SWR }, INT_MIN, INT_MAX , PARAM, .unit = "resampler"},
95 {"soxr" , "select SoX Resampler" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_ENGINE_SOXR }, INT_MIN, INT_MAX , PARAM, .unit = "resampler"},
96 {"precision" , "set soxr resampling precision (in bits)"
97 , OFFSET(precision) , AV_OPT_TYPE_DOUBLE,{.dbl=20.0 }, 15.0 , 33.0 , PARAM },
98 {"cheby" , "enable soxr Chebyshev passband & higher-precision irrational ratio approximation"
99 , OFFSET(cheby) , AV_OPT_TYPE_BOOL , {.i64=0 }, 0 , 1 , PARAM },
100 {"min_comp" , "set minimum difference between timestamps and audio data (in seconds) below which no timestamp compensation of either kind is applied"
101 , OFFSET(min_compensation),AV_OPT_TYPE_FLOAT ,{.dbl=FLT_MAX }, 0 , FLT_MAX , PARAM },
102 {"min_hard_comp" , "set minimum difference between timestamps and audio data (in seconds) to trigger padding/trimming the data."
103 , OFFSET(min_hard_compensation),AV_OPT_TYPE_FLOAT ,{.dbl=0.1 }, 0 , INT_MAX , PARAM },
104 {"comp_duration" , "set duration (in seconds) over which data is stretched/squeezed to make it match the timestamps."
105 , OFFSET(soft_compensation_duration),AV_OPT_TYPE_FLOAT ,{.dbl=1 }, 0 , INT_MAX , PARAM },
106 {"max_soft_comp" , "set maximum factor by which data is stretched/squeezed to make it match the timestamps."
107 , OFFSET(max_soft_compensation),AV_OPT_TYPE_FLOAT ,{.dbl=0 }, INT_MIN, INT_MAX , PARAM },
108 {"async" , "simplified 1 parameter audio timestamp matching, 0(disabled), 1(filling and trimming), >1(maximum stretch/squeeze in samples per second)"
109 , OFFSET(async) , AV_OPT_TYPE_FLOAT ,{.dbl=0 }, INT_MIN, INT_MAX , PARAM },
110 {"first_pts" , "Assume the first pts should be this value (in samples)."
111 , OFFSET(firstpts_in_samples), AV_OPT_TYPE_INT64 ,{.i64=AV_NOPTS_VALUE }, INT64_MIN,INT64_MAX, PARAM },
112
113 { "matrix_encoding" , "set matrixed stereo encoding" , OFFSET(matrix_encoding), AV_OPT_TYPE_INT ,{.i64 = AV_MATRIX_ENCODING_NONE}, AV_MATRIX_ENCODING_NONE, AV_MATRIX_ENCODING_NB-1, PARAM, .unit = "matrix_encoding" },
114 { "none", "select none", 0, AV_OPT_TYPE_CONST, { .i64 = AV_MATRIX_ENCODING_NONE }, INT_MIN, INT_MAX, PARAM, .unit = "matrix_encoding" },
115 { "dolby", "select Dolby", 0, AV_OPT_TYPE_CONST, { .i64 = AV_MATRIX_ENCODING_DOLBY }, INT_MIN, INT_MAX, PARAM, .unit = "matrix_encoding" },
116 { "dplii", "select Dolby Pro Logic II", 0, AV_OPT_TYPE_CONST, { .i64 = AV_MATRIX_ENCODING_DPLII }, INT_MIN, INT_MAX, PARAM, .unit = "matrix_encoding" },
117
118 { "filter_type" , "select swr filter type" , OFFSET(filter_type) , AV_OPT_TYPE_INT , { .i64 = SWR_FILTER_TYPE_KAISER }, SWR_FILTER_TYPE_CUBIC, SWR_FILTER_TYPE_KAISER, PARAM, .unit = "filter_type" },
119 { "cubic" , "select cubic" , 0 , AV_OPT_TYPE_CONST, { .i64 = SWR_FILTER_TYPE_CUBIC }, INT_MIN, INT_MAX, PARAM, .unit = "filter_type" },
120 { "blackman_nuttall", "select Blackman Nuttall windowed sinc", 0 , AV_OPT_TYPE_CONST, { .i64 = SWR_FILTER_TYPE_BLACKMAN_NUTTALL }, INT_MIN, INT_MAX, PARAM, .unit = "filter_type" },
121 { "kaiser" , "select Kaiser windowed sinc" , 0 , AV_OPT_TYPE_CONST, { .i64 = SWR_FILTER_TYPE_KAISER }, INT_MIN, INT_MAX, PARAM, .unit = "filter_type" },
122
123 { "kaiser_beta" , "set swr Kaiser window beta" , OFFSET(kaiser_beta) , AV_OPT_TYPE_DOUBLE , {.dbl=9 }, 2 , 16 , PARAM },
124
125 { "output_sample_bits" , "set swr number of output sample bits", OFFSET(dither.output_sample_bits), AV_OPT_TYPE_INT , {.i64=0 }, 0 , 64 , PARAM },
126 {0}
127 };
128
129 ✗ static const char* context_to_name(void* ptr) {
130 ✗ return "SWR";
131 }
132
133 static const AVClass av_class = {
134 .class_name = "SWResampler",
135 .item_name = context_to_name,
136 .option = options,
137 .version = LIBAVUTIL_VERSION_INT,
138 .log_level_offset_offset = OFFSET(log_level_offset),
139 .parent_log_context_offset = OFFSET(log_ctx),
140 .category = AV_CLASS_CATEGORY_SWRESAMPLER,
141 };
142
143 119239 const AVClass *swr_get_class(void)
144 {
145 119239 return &av_class;
146 }
147
148 2527 av_cold struct SwrContext *swr_alloc(void){
149 2527 SwrContext *s= av_mallocz(sizeof(SwrContext));
150
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 2527 if(s){
151 2527 s->av_class= &av_class;
152 2527 av_opt_set_defaults(s);
153 2527 s->firstpts = AV_NOPTS_VALUE;
154 }
155 2527 return s;
156 }
157