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FFmpeg/libswresample/options.c

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swresample: split option table to a separate file Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-06 04:08:34 +03:00
/*
* Copyright (C) 2011-2013 Michael Niedermayer (michaelni@gmx.at)
*
* This file is part of libswresample
*
* libswresample 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.
*
* libswresample 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 libswresample; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
avcodec/avcodec: Stop including channel_layout.h in avcodec.h Also include channel_layout.h directly wherever used. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-06-12 01:10:58 +02:00
#include "libavutil/channel_layout.h"
swresample: split option table to a separate file Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-06 04:08:34 +03:00
#include "libavutil/opt.h"
#include "swresample_internal.h"
#include <float.h>
#define C30DB M_SQRT2
#define C15DB 1.189207115
#define C__0DB 1.0
#define C_15DB 0.840896415
#define C_30DB M_SQRT1_2
#define C_45DB 0.594603558
#define C_60DB 0.5
#define OFFSET(x) offsetof(SwrContext,x)
#define PARAM AV_OPT_FLAG_AUDIO_PARAM
swresample: convert to new channel layout API Signed-off-by: James Almer <jamrial@gmail.com>
2021-08-27 05:37:53 +02:00
#define DEPREC AV_OPT_FLAG_DEPRECATED
swresample: split option table to a separate file Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-06 04:08:34 +03:00
static const AVOption options[]={
swresample: convert to new channel layout API Signed-off-by: James Almer <jamrial@gmail.com>
2021-08-27 05:37:53 +02:00
#if FF_API_OLD_CHANNEL_LAYOUT
{"ich" , "set input channel count (Deprecated, use ichl)",
OFFSET(user_in_ch_count ), AV_OPT_TYPE_INT, {.i64=0 }, 0 , SWR_CH_MAX, PARAM|DEPREC},
{"in_channel_count" , "set input channel count (Deprecated, use in_chlayout)",
OFFSET(user_in_ch_count ), AV_OPT_TYPE_INT, {.i64=0 }, 0 , SWR_CH_MAX, PARAM|DEPREC},
{"och" , "set output channel count (Deprecated, use ochl)",
OFFSET(user_out_ch_count ), AV_OPT_TYPE_INT, {.i64=0 }, 0 , SWR_CH_MAX, PARAM|DEPREC},
{"out_channel_count" , "set output channel count (Deprecated, use out_chlayout)",
OFFSET(user_out_ch_count ), AV_OPT_TYPE_INT, {.i64=0 }, 0 , SWR_CH_MAX, PARAM|DEPREC},
swresample/swresample: add a used channel layout option using the new API Replaces the "used channel count" option, which is now deprecated. Signed-off-by: James Almer <jamrial@gmail.com>
2023-02-17 20:41:56 +02:00
{"uch" , "set used channel count" , OFFSET(user_used_ch_count), AV_OPT_TYPE_INT, {.i64=0 }, 0 , SWR_CH_MAX, PARAM|DEPREC},
{"used_channel_count" , "set used channel count" , OFFSET(user_used_ch_count), AV_OPT_TYPE_INT, {.i64=0 }, 0 , SWR_CH_MAX, PARAM|DEPREC},
swresample: convert to new channel layout API Signed-off-by: James Almer <jamrial@gmail.com>
2021-08-27 05:37:53 +02:00
#endif
swresample: split option table to a separate file Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-06 04:08:34 +03:00
{"isr" , "set input sample rate" , OFFSET( in_sample_rate), AV_OPT_TYPE_INT , {.i64=0 }, 0 , INT_MAX , PARAM},
{"in_sample_rate" , "set input sample rate" , OFFSET( in_sample_rate), AV_OPT_TYPE_INT , {.i64=0 }, 0 , INT_MAX , PARAM},
{"osr" , "set output sample rate" , OFFSET(out_sample_rate), AV_OPT_TYPE_INT , {.i64=0 }, 0 , INT_MAX , PARAM},
{"out_sample_rate" , "set output sample rate" , OFFSET(out_sample_rate), AV_OPT_TYPE_INT , {.i64=0 }, 0 , INT_MAX , PARAM},
{"isf" , "set input sample format" , OFFSET( in_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1 , INT_MAX, PARAM},
{"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},
{"osf" , "set output sample format" , OFFSET(out_sample_fmt ), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1 , INT_MAX, PARAM},
{"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},
swr: Remember previously set int_sample_format from user Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-06-22 18:27:27 +02:00
{"tsf" , "set internal sample format" , OFFSET(user_int_sample_fmt), AV_OPT_TYPE_SAMPLE_FMT , {.i64=AV_SAMPLE_FMT_NONE}, -1 , INT_MAX, PARAM},
{"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},
swresample: convert to new channel layout API Signed-off-by: James Almer <jamrial@gmail.com>
2021-08-27 05:37:53 +02:00
#if FF_API_OLD_CHANNEL_LAYOUT
{"icl" , "set input channel layout (Deprecated, use ichl)",
OFFSET(user_in_ch_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=0 }, INT64_MIN, INT64_MAX, PARAM|DEPREC, "channel_layout"},
{"in_channel_layout" , "set input channel layout (Deprecated, use in_chlayout)",
OFFSET(user_in_ch_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=0 }, INT64_MIN, INT64_MAX, PARAM|DEPREC, "channel_layout"},
{"ocl" , "set output channel layout (Deprecated, use ochl)",
OFFSET(user_out_ch_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=0 }, INT64_MIN, INT64_MAX, PARAM|DEPREC, "channel_layout"},
{"out_channel_layout" , "set output channel layout (Deprecated, use out_chlayout)",
OFFSET(user_out_ch_layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=0 }, INT64_MIN, INT64_MAX, PARAM|DEPREC, "channel_layout"},
#endif
{"ichl" , "set input channel layout" , OFFSET(user_in_chlayout ), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, "chlayout"},
{"in_chlayout" , "set input channel layout" , OFFSET(user_in_chlayout ), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, "chlayout"},
{"ochl" , "set output channel layout" , OFFSET(user_out_chlayout), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, "chlayout"},
{"out_chlayout" , "set output channel layout" , OFFSET(user_out_chlayout), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, "chlayout"},
swresample/swresample: add a used channel layout option using the new API Replaces the "used channel count" option, which is now deprecated. Signed-off-by: James Almer <jamrial@gmail.com>
2023-02-17 20:41:56 +02:00
{"uchl" , "set used channel layout" , OFFSET(user_used_chlayout), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, "chlayout"},
{"used_chlayout" , "set used channel layout" , OFFSET(user_used_chlayout), AV_OPT_TYPE_CHLAYOUT, {.str=NULL }, 0, 0 , PARAM, "chlayout"},
swresample: split option table to a separate file Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-06 04:08:34 +03:00
{"clev" , "set center mix level" , OFFSET(clev ), AV_OPT_TYPE_FLOAT, {.dbl=C_30DB }, -32 , 32 , PARAM},
{"center_mix_level" , "set center mix level" , OFFSET(clev ), AV_OPT_TYPE_FLOAT, {.dbl=C_30DB }, -32 , 32 , PARAM},
{"slev" , "set surround mix level" , OFFSET(slev ), AV_OPT_TYPE_FLOAT, {.dbl=C_30DB }, -32 , 32 , PARAM},
{"surround_mix_level" , "set surround mix Level" , OFFSET(slev ), AV_OPT_TYPE_FLOAT, {.dbl=C_30DB }, -32 , 32 , PARAM},
{"lfe_mix_level" , "set LFE mix level" , OFFSET(lfe_mix_level ), AV_OPT_TYPE_FLOAT, {.dbl=0 }, -32 , 32 , PARAM},
{"rmvol" , "set rematrix volume" , OFFSET(rematrix_volume), AV_OPT_TYPE_FLOAT, {.dbl=1.0 }, -1000 , 1000 , PARAM},
{"rematrix_volume" , "set rematrix volume" , OFFSET(rematrix_volume), AV_OPT_TYPE_FLOAT, {.dbl=1.0 }, -1000 , 1000 , PARAM},
{"rematrix_maxval" , "set rematrix maxval" , OFFSET(rematrix_maxval), AV_OPT_TYPE_FLOAT, {.dbl=0.0 }, 0 , 1000 , PARAM},
{"flags" , "set flags" , OFFSET(flags ), AV_OPT_TYPE_FLAGS, {.i64=0 }, 0 , UINT_MAX , PARAM, "flags"},
{"swr_flags" , "set flags" , OFFSET(flags ), AV_OPT_TYPE_FLAGS, {.i64=0 }, 0 , UINT_MAX , PARAM, "flags"},
{"res" , "force resampling" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_FLAG_RESAMPLE }, INT_MIN, INT_MAX , PARAM, "flags"},
{"dither_scale" , "set dither scale" , OFFSET(dither.scale ), AV_OPT_TYPE_FLOAT, {.dbl=1 }, 0 , INT_MAX , PARAM},
swresample: Skip over dither steps if dithering scale is 0 Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2016-08-18 11:52:11 +02:00
{"dither_method" , "set dither method" , OFFSET(user_dither_method),AV_OPT_TYPE_INT, {.i64=0 }, 0 , SWR_DITHER_NB-1, PARAM, "dither_method"},
swresample: split option table to a separate file Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-06 04:08:34 +03:00
{"rectangular" , "select rectangular dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_RECTANGULAR}, INT_MIN, INT_MAX , PARAM, "dither_method"},
{"triangular" , "select triangular dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_TRIANGULAR }, INT_MIN, INT_MAX , PARAM, "dither_method"},
{"triangular_hp" , "select triangular dither with high pass" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_TRIANGULAR_HIGHPASS }, INT_MIN, INT_MAX, PARAM, "dither_method"},
doc/resampler, swresample/options: use proper capitalization Proper names should be capitalized in all user facing API as far as possible. The option names themselves have not been changed since: 1. We consistently keep option names in lower case. 2. Changing them would break existing scripts. 3. I suspect that we want to be similar to Sox and its relevant options. The converse is also true: improper names should not be capitalized generally. Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2015-10-10 18:48:08 +02:00
{"lipshitz" , "select Lipshitz noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_LIPSHITZ}, INT_MIN, INT_MAX, PARAM, "dither_method"},
{"shibata" , "select Shibata noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_SHIBATA }, INT_MIN, INT_MAX, PARAM, "dither_method"},
{"low_shibata" , "select low Shibata noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_LOW_SHIBATA }, INT_MIN, INT_MAX, PARAM, "dither_method"},
{"high_shibata" , "select high Shibata noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_HIGH_SHIBATA }, INT_MIN, INT_MAX, PARAM, "dither_method"},
swresample: split option table to a separate file Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-06 04:08:34 +03:00
{"f_weighted" , "select f-weighted noise shaping dither" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_DITHER_NS_F_WEIGHTED }, INT_MIN, INT_MAX, PARAM, "dither_method"},
{"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, "dither_method"},
{"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, "dither_method"},
{"filter_size" , "set swr resampling filter size", OFFSET(filter_size) , AV_OPT_TYPE_INT , {.i64=32 }, 0 , INT_MAX , PARAM },
{"phase_shift" , "set swr resampling phase shift", OFFSET(phase_shift) , AV_OPT_TYPE_INT , {.i64=10 }, 0 , 24 , PARAM },
swresample/options: enable linear_interp and exact_rational by default better quality without speedloss Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
2017-03-13 15:33:03 +02:00
{"linear_interp" , "enable linear interpolation" , OFFSET(linear_interp) , AV_OPT_TYPE_BOOL , {.i64=1 }, 0 , 1 , PARAM },
{"exact_rational" , "enable exact rational" , OFFSET(exact_rational) , AV_OPT_TYPE_BOOL , {.i64=1 }, 0 , 1 , PARAM },
swresample: split option table to a separate file Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-06 04:08:34 +03:00
{"cutoff" , "set cutoff frequency ratio" , OFFSET(cutoff) , AV_OPT_TYPE_DOUBLE,{.dbl=0. }, 0 , 1 , PARAM },
/* duplicate option in order to work with avconv */
{"resample_cutoff" , "set cutoff frequency ratio" , OFFSET(cutoff) , AV_OPT_TYPE_DOUBLE,{.dbl=0. }, 0 , 1 , PARAM },
{"resampler" , "set resampling Engine" , OFFSET(engine) , AV_OPT_TYPE_INT , {.i64=0 }, 0 , SWR_ENGINE_NB-1, PARAM, "resampler"},
{"swr" , "select SW Resampler" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_ENGINE_SWR }, INT_MIN, INT_MAX , PARAM, "resampler"},
{"soxr" , "select SoX Resampler" , 0 , AV_OPT_TYPE_CONST, {.i64=SWR_ENGINE_SOXR }, INT_MIN, INT_MAX , PARAM, "resampler"},
{"precision" , "set soxr resampling precision (in bits)"
, OFFSET(precision) , AV_OPT_TYPE_DOUBLE,{.dbl=20.0 }, 15.0 , 33.0 , PARAM },
{"cheby" , "enable soxr Chebyshev passband & higher-precision irrational ratio approximation"
swresample: use AV_OPT_TYPE_BOOL for linear_interp and cheby options
2015-11-21 23:05:40 +02:00
, OFFSET(cheby) , AV_OPT_TYPE_BOOL , {.i64=0 }, 0 , 1 , PARAM },
swresample: split option table to a separate file Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-06 04:08:34 +03:00
{"min_comp" , "set minimum difference between timestamps and audio data (in seconds) below which no timestamp compensation of either kind is applied"
, OFFSET(min_compensation),AV_OPT_TYPE_FLOAT ,{.dbl=FLT_MAX }, 0 , FLT_MAX , PARAM },
{"min_hard_comp" , "set minimum difference between timestamps and audio data (in seconds) to trigger padding/trimming the data."
, OFFSET(min_hard_compensation),AV_OPT_TYPE_FLOAT ,{.dbl=0.1 }, 0 , INT_MAX , PARAM },
{"comp_duration" , "set duration (in seconds) over which data is stretched/squeezed to make it match the timestamps."
, OFFSET(soft_compensation_duration),AV_OPT_TYPE_FLOAT ,{.dbl=1 }, 0 , INT_MAX , PARAM },
{"max_soft_comp" , "set maximum factor by which data is stretched/squeezed to make it match the timestamps."
, OFFSET(max_soft_compensation),AV_OPT_TYPE_FLOAT ,{.dbl=0 }, INT_MIN, INT_MAX , PARAM },
{"async" , "simplified 1 parameter audio timestamp matching, 0(disabled), 1(filling and trimming), >1(maximum stretch/squeeze in samples per second)"
, OFFSET(async) , AV_OPT_TYPE_FLOAT ,{.dbl=0 }, INT_MIN, INT_MAX , PARAM },
{"first_pts" , "Assume the first pts should be this value (in samples)."
, OFFSET(firstpts_in_samples), AV_OPT_TYPE_INT64 ,{.i64=AV_NOPTS_VALUE }, INT64_MIN,INT64_MAX, PARAM },
{ "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, "matrix_encoding" },
{ "none", "select none", 0, AV_OPT_TYPE_CONST, { .i64 = AV_MATRIX_ENCODING_NONE }, INT_MIN, INT_MAX, PARAM, "matrix_encoding" },
{ "dolby", "select Dolby", 0, AV_OPT_TYPE_CONST, { .i64 = AV_MATRIX_ENCODING_DOLBY }, INT_MIN, INT_MAX, PARAM, "matrix_encoding" },
{ "dplii", "select Dolby Pro Logic II", 0, AV_OPT_TYPE_CONST, { .i64 = AV_MATRIX_ENCODING_DPLII }, INT_MIN, INT_MAX, PARAM, "matrix_encoding" },
{ "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, "filter_type" },
{ "cubic" , "select cubic" , 0 , AV_OPT_TYPE_CONST, { .i64 = SWR_FILTER_TYPE_CUBIC }, INT_MIN, INT_MAX, PARAM, "filter_type" },
doc/resampler, swresample/options: use proper capitalization Proper names should be capitalized in all user facing API as far as possible. The option names themselves have not been changed since: 1. We consistently keep option names in lower case. 2. Changing them would break existing scripts. 3. I suspect that we want to be similar to Sox and its relevant options. The converse is also true: improper names should not be capitalized generally. Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2015-10-10 18:48:08 +02:00
{ "blackman_nuttall", "select Blackman Nuttall windowed sinc", 0 , AV_OPT_TYPE_CONST, { .i64 = SWR_FILTER_TYPE_BLACKMAN_NUTTALL }, INT_MIN, INT_MAX, PARAM, "filter_type" },
{ "kaiser" , "select Kaiser windowed sinc" , 0 , AV_OPT_TYPE_CONST, { .i64 = SWR_FILTER_TYPE_KAISER }, INT_MIN, INT_MAX, PARAM, "filter_type" },
swresample: split option table to a separate file Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-06 04:08:34 +03:00
swresample: allow double precision beta value for the Kaiser window Kaiser windows inherently don't require beta to be an integer. This was an arbitrary restriction. Moreover, soxr does not require it, and in fact often estimates beta to a non-integral value. Thus, this patch allows greater flexibility for swresample clients. Micro version is updated. Reviewed-by: Derek Buitenhuis <derek.buitenhuis@gmail.com> Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
2015-11-07 17:16:27 +02:00
{ "kaiser_beta" , "set swr Kaiser window beta" , OFFSET(kaiser_beta) , AV_OPT_TYPE_DOUBLE , {.dbl=9 }, 2 , 16 , PARAM },
swresample: split option table to a separate file Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-06 04:08:34 +03:00
{ "output_sample_bits" , "set swr number of output sample bits", OFFSET(dither.output_sample_bits), AV_OPT_TYPE_INT , {.i64=0 }, 0 , 64 , PARAM },
{0}
};
static const char* context_to_name(void* ptr) {
return "SWR";
}
static const AVClass av_class = {
.class_name = "SWResampler",
.item_name = context_to_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
.log_level_offset_offset = OFFSET(log_level_offset),
.parent_log_context_offset = OFFSET(log_ctx),
.category = AV_CLASS_CATEGORY_SWRESAMPLER,
};
const AVClass *swr_get_class(void)
{
return &av_class;
}
av_cold struct SwrContext *swr_alloc(void){
SwrContext *s= av_mallocz(sizeof(SwrContext));
if(s){
s->av_class= &av_class;
av_opt_set_defaults(s);
}
return s;
}
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