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FFmpeg/libavfilter/af_afwtdn.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* Copyright (c) 2020 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <float.h>
#include "libavutil/avassert.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
enum WaveletTypes {
SYM2,
SYM4,
RBIOR68,
DEB10,
SYM10,
COIF5,
BL3,
NB_WAVELET_TYPES,
};
/*
* All wavelets coefficients are taken from: http://wavelets.pybytes.com/
*/
static const double bl3_lp[42] = {
0.000146098, -0.000232304, -0.000285414, 0.000462093, 0.000559952,
-0.000927187, -0.001103748, 0.00188212, 0.002186714, -0.003882426,
-0.00435384, 0.008201477, 0.008685294, -0.017982291, -0.017176331,
0.042068328, 0.032080869, -0.110036987, -0.050201753, 0.433923147,
0.766130398, 0.433923147, -0.050201753, -0.110036987, 0.032080869,
0.042068328, -0.017176331, -0.017982291, 0.008685294, 0.008201477,
-0.00435384, -0.003882426, 0.002186714, 0.00188212, -0.001103748,
-0.000927187, 0.000559952, 0.000462093, -0.000285414, -0.000232304,
0.000146098, 0.0,
};
static const double bl3_hp[42] = {
0.0, 0.000146098, 0.000232304, -0.000285414, -0.000462093, 0.000559952,
0.000927187, -0.001103748, -0.00188212, 0.002186714, 0.003882426,
-0.00435384, -0.008201477, 0.008685294, 0.017982291, -0.017176331,
-0.042068328, 0.032080869, 0.110036987, -0.050201753, -0.433923147,
0.766130398, -0.433923147, -0.050201753, 0.110036987, 0.032080869,
-0.042068328, -0.017176331, 0.017982291, 0.008685294, -0.008201477,
-0.00435384, 0.003882426, 0.002186714, -0.00188212, -0.001103748,
0.000927187, 0.000559952, -0.000462093, -0.000285414, 0.000232304,
0.000146098,
};
static const double bl3_ilp[42] = {
0.0, 0.000146098, -0.000232304, -0.000285414, 0.000462093, 0.000559952,
-0.000927187, -0.001103748, 0.00188212, 0.002186714, -0.003882426,
-0.00435384, 0.008201477, 0.008685294, -0.017982291, -0.017176331,
0.042068328, 0.032080869, -0.110036987, -0.050201753, 0.433923147,
0.766130398, 0.433923147, -0.050201753, -0.110036987, 0.032080869,
0.042068328, -0.017176331, -0.017982291, 0.008685294, 0.008201477,
-0.00435384, -0.003882426, 0.002186714, 0.00188212, -0.001103748,
-0.000927187, 0.000559952, 0.000462093, -0.000285414, -0.000232304,
0.000146098,
};
static const double bl3_ihp[42] = {
0.000146098, 0.000232304, -0.000285414, -0.000462093, 0.000559952,
0.000927187, -0.001103748, -0.00188212, 0.002186714, 0.003882426,
-0.00435384, -0.008201477, 0.008685294, 0.017982291, -0.017176331,
-0.042068328, 0.032080869, 0.110036987, -0.050201753, -0.433923147,
0.766130398, -0.433923147, -0.050201753, 0.110036987, 0.032080869,
-0.042068328, -0.017176331, 0.017982291, 0.008685294, -0.008201477,
-0.00435384, 0.003882426, 0.002186714, -0.00188212, -0.001103748,
0.000927187, 0.000559952, -0.000462093, -0.000285414, 0.000232304,
0.000146098,
};
static const double sym10_lp[20] = {
0.0007701598091144901, 9.563267072289475e-05,
-0.008641299277022422, -0.0014653825813050513,
0.0459272392310922, 0.011609893903711381,
-0.15949427888491757, -0.07088053578324385,
0.47169066693843925, 0.7695100370211071,
0.38382676106708546, -0.03553674047381755,
-0.0319900568824278, 0.04999497207737669,
0.005764912033581909, -0.02035493981231129,
-0.0008043589320165449, 0.004593173585311828,
5.7036083618494284e-05, -0.0004593294210046588,
};
static const double sym10_hp[20] = {
0.0004593294210046588, 5.7036083618494284e-05,
-0.004593173585311828, -0.0008043589320165449,
0.02035493981231129, 0.005764912033581909,
-0.04999497207737669, -0.0319900568824278,
0.03553674047381755, 0.38382676106708546,
-0.7695100370211071, 0.47169066693843925,
0.07088053578324385, -0.15949427888491757,
-0.011609893903711381, 0.0459272392310922,
0.0014653825813050513, -0.008641299277022422,
-9.563267072289475e-05, 0.0007701598091144901,
};
static const double sym10_ilp[20] = {
-0.0004593294210046588, 5.7036083618494284e-05,
0.004593173585311828, -0.0008043589320165449,
-0.02035493981231129, 0.005764912033581909,
0.04999497207737669, -0.0319900568824278,
-0.03553674047381755, 0.38382676106708546,
0.7695100370211071, 0.47169066693843925,
-0.07088053578324385, -0.15949427888491757,
0.011609893903711381, 0.0459272392310922,
-0.0014653825813050513, -0.008641299277022422,
9.563267072289475e-05, 0.0007701598091144901,
};
static const double sym10_ihp[20] = {
0.0007701598091144901, -9.563267072289475e-05,
-0.008641299277022422, 0.0014653825813050513,
0.0459272392310922, -0.011609893903711381,
-0.15949427888491757, 0.07088053578324385,
0.47169066693843925, -0.7695100370211071,
0.38382676106708546, 0.03553674047381755,
-0.0319900568824278, -0.04999497207737669,
0.005764912033581909, 0.02035493981231129,
-0.0008043589320165449, -0.004593173585311828,
5.7036083618494284e-05, 0.0004593294210046588,
};
static const double rbior68_lp[18] = {
0.0, 0.0, 0.0, 0.0,
0.014426282505624435, 0.014467504896790148,
-0.07872200106262882, -0.04036797903033992,
0.41784910915027457, 0.7589077294536541,
0.41784910915027457, -0.04036797903033992,
-0.07872200106262882, 0.014467504896790148,
0.014426282505624435, 0.0, 0.0, 0.0,
};
static const double rbior68_hp[18] = {
-0.0019088317364812906, -0.0019142861290887667,
0.016990639867602342, 0.01193456527972926,
-0.04973290349094079, -0.07726317316720414,
0.09405920349573646, 0.4207962846098268,
-0.8259229974584023, 0.4207962846098268,
0.09405920349573646, -0.07726317316720414,
-0.04973290349094079, 0.01193456527972926,
0.016990639867602342, -0.0019142861290887667,
-0.0019088317364812906, 0.0,
};
static const double rbior68_ilp[18] = {
0.0019088317364812906, -0.0019142861290887667,
-0.016990639867602342, 0.01193456527972926,
0.04973290349094079, -0.07726317316720414,
-0.09405920349573646, 0.4207962846098268,
0.8259229974584023, 0.4207962846098268,
-0.09405920349573646, -0.07726317316720414,
0.04973290349094079, 0.01193456527972926,
-0.016990639867602342, -0.0019142861290887667,
0.0019088317364812906, 0.0,
};
static const double rbior68_ihp[18] = {
0.0, 0.0, 0.0, 0.0,
0.014426282505624435, -0.014467504896790148,
-0.07872200106262882, 0.04036797903033992,
0.41784910915027457, -0.7589077294536541,
0.41784910915027457, 0.04036797903033992,
-0.07872200106262882, -0.014467504896790148,
0.014426282505624435, 0.0, 0.0, 0.0,
};
static const double coif5_lp[30] = {
-9.517657273819165e-08, -1.6744288576823017e-07,
2.0637618513646814e-06, 3.7346551751414047e-06,
-2.1315026809955787e-05, -4.134043227251251e-05,
0.00014054114970203437, 0.00030225958181306315,
-0.0006381313430451114, -0.0016628637020130838,
0.0024333732126576722, 0.006764185448053083,
-0.009164231162481846, -0.01976177894257264,
0.03268357426711183, 0.0412892087501817,
-0.10557420870333893, -0.06203596396290357,
0.4379916261718371, 0.7742896036529562,
0.4215662066908515, -0.05204316317624377,
-0.09192001055969624, 0.02816802897093635,
0.023408156785839195, -0.010131117519849788,
-0.004159358781386048, 0.0021782363581090178,
0.00035858968789573785, -0.00021208083980379827,
};
static const double coif5_hp[30] = {
0.00021208083980379827, 0.00035858968789573785,
-0.0021782363581090178, -0.004159358781386048,
0.010131117519849788, 0.023408156785839195,
-0.02816802897093635, -0.09192001055969624,
0.05204316317624377, 0.4215662066908515,
-0.7742896036529562, 0.4379916261718371,
0.06203596396290357, -0.10557420870333893,
-0.0412892087501817, 0.03268357426711183,
0.01976177894257264, -0.009164231162481846,
-0.006764185448053083, 0.0024333732126576722,
0.0016628637020130838, -0.0006381313430451114,
-0.00030225958181306315, 0.00014054114970203437,
4.134043227251251e-05, -2.1315026809955787e-05,
-3.7346551751414047e-06, 2.0637618513646814e-06,
1.6744288576823017e-07, -9.517657273819165e-08,
};
static const double coif5_ilp[30] = {
-0.00021208083980379827, 0.00035858968789573785,
0.0021782363581090178, -0.004159358781386048,
-0.010131117519849788, 0.023408156785839195,
0.02816802897093635, -0.09192001055969624,
-0.05204316317624377, 0.4215662066908515,
0.7742896036529562, 0.4379916261718371,
-0.06203596396290357, -0.10557420870333893,
0.0412892087501817, 0.03268357426711183,
-0.01976177894257264, -0.009164231162481846,
0.006764185448053083, 0.0024333732126576722,
-0.0016628637020130838, -0.0006381313430451114,
0.00030225958181306315, 0.00014054114970203437,
-4.134043227251251e-05, -2.1315026809955787e-05,
3.7346551751414047e-06, 2.0637618513646814e-06,
-1.6744288576823017e-07, -9.517657273819165e-08,
};
static const double coif5_ihp[30] = {
-9.517657273819165e-08, 1.6744288576823017e-07,
2.0637618513646814e-06, -3.7346551751414047e-06,
-2.1315026809955787e-05, 4.134043227251251e-05,
0.00014054114970203437, -0.00030225958181306315,
-0.0006381313430451114, 0.0016628637020130838,
0.0024333732126576722, -0.006764185448053083,
-0.009164231162481846, 0.01976177894257264,
0.03268357426711183, -0.0412892087501817,
-0.10557420870333893, 0.06203596396290357,
0.4379916261718371, -0.7742896036529562,
0.4215662066908515, 0.05204316317624377,
-0.09192001055969624, -0.02816802897093635,
0.023408156785839195, 0.010131117519849788,
-0.004159358781386048, -0.0021782363581090178,
0.00035858968789573785, 0.00021208083980379827,
};
static const double deb10_lp[20] = {
-1.326420300235487e-05, 9.358867000108985e-05,
-0.0001164668549943862, -0.0006858566950046825,
0.00199240529499085, 0.0013953517469940798,
-0.010733175482979604, 0.0036065535669883944,
0.03321267405893324, -0.02945753682194567,
-0.07139414716586077, 0.09305736460380659,
0.12736934033574265, -0.19594627437659665,
-0.24984642432648865, 0.2811723436604265,
0.6884590394525921, 0.5272011889309198,
0.18817680007762133, 0.026670057900950818,
};
static const double deb10_hp[20] = {
-0.026670057900950818, 0.18817680007762133,
-0.5272011889309198, 0.6884590394525921,
-0.2811723436604265, -0.24984642432648865,
0.19594627437659665, 0.12736934033574265,
-0.09305736460380659, -0.07139414716586077,
0.02945753682194567, 0.03321267405893324,
-0.0036065535669883944, -0.010733175482979604,
-0.0013953517469940798, 0.00199240529499085,
0.0006858566950046825, -0.0001164668549943862,
-9.358867000108985e-05, -1.326420300235487e-05,
};
static const double deb10_ilp[20] = {
0.026670057900950818, 0.18817680007762133,
0.5272011889309198, 0.6884590394525921,
0.2811723436604265, -0.24984642432648865,
-0.19594627437659665, 0.12736934033574265,
0.09305736460380659, -0.07139414716586077,
-0.02945753682194567, 0.03321267405893324,
0.0036065535669883944, -0.010733175482979604,
0.0013953517469940798, 0.00199240529499085,
-0.0006858566950046825, -0.0001164668549943862,
9.358867000108985e-05, -1.326420300235487e-05,
};
static const double deb10_ihp[20] = {
-1.326420300235487e-05, -9.358867000108985e-05,
-0.0001164668549943862, 0.0006858566950046825,
0.00199240529499085, -0.0013953517469940798,
-0.010733175482979604, -0.0036065535669883944,
0.03321267405893324, 0.02945753682194567,
-0.07139414716586077, -0.09305736460380659,
0.12736934033574265, 0.19594627437659665,
-0.24984642432648865, -0.2811723436604265,
0.6884590394525921, -0.5272011889309198,
0.18817680007762133, -0.026670057900950818,
};
static const double sym4_lp[8] = {
-0.07576571478927333,
-0.02963552764599851,
0.49761866763201545,
0.8037387518059161,
0.29785779560527736,
-0.09921954357684722,
-0.012603967262037833,
0.0322231006040427,
};
static const double sym4_hp[8] = {
-0.0322231006040427,
-0.012603967262037833,
0.09921954357684722,
0.29785779560527736,
-0.8037387518059161,
0.49761866763201545,
0.02963552764599851,
-0.07576571478927333,
};
static const double sym4_ilp[8] = {
0.0322231006040427,
-0.012603967262037833,
-0.09921954357684722,
0.29785779560527736,
0.8037387518059161,
0.49761866763201545,
-0.02963552764599851,
-0.07576571478927333,
};
static const double sym4_ihp[8] = {
-0.07576571478927333,
0.02963552764599851,
0.49761866763201545,
-0.8037387518059161,
0.29785779560527736,
0.09921954357684722,
-0.012603967262037833,
-0.0322231006040427,
};
static const double sym2_lp[4] = {
-0.12940952255092145, 0.22414386804185735,
0.836516303737469, 0.48296291314469025,
};
static const double sym2_hp[4] = {
-0.48296291314469025, 0.836516303737469,
-0.22414386804185735, -0.12940952255092145,
};
static const double sym2_ilp[4] = {
0.48296291314469025, 0.836516303737469,
0.22414386804185735, -0.12940952255092145,
};
static const double sym2_ihp[4] = {
-0.12940952255092145, -0.22414386804185735,
0.836516303737469, -0.48296291314469025,
};
#define MAX_LEVELS 13
typedef struct ChannelParams {
int *output_length;
int *filter_length;
double **output_coefs;
double **subbands_to_free;
double **filter_coefs;
int tempa_length;
int tempa_len_max;
int temp_in_length;
int temp_in_max_length;
int buffer_length;
int min_left_ext;
int max_left_ext;
double *tempa;
double *tempd;
double *temp_in;
double *buffer;
double *buffer2;
double *prev;
double *overlap;
} ChannelParams;
typedef struct AudioFWTDNContext {
const AVClass *class;
double sigma;
double percent;
double softness;
uint64_t sn;
int64_t eof_pts;
int eof;
int wavelet_type;
int channels;
int nb_samples;
int levels;
int wavelet_length;
int need_profile;
int got_profile;
int adaptive;
int delay;
int drop_samples;
int padd_samples;
int overlap_length;
int prev_length;
ChannelParams *cp;
const double *lp, *hp;
const double *ilp, *ihp;
AVFrame *stddev, *absmean, *filter;
AVFrame *new_stddev, *new_absmean;
int (*filter_channel)(AVFilterContext *ctx, void *arg, int ch, int nb_jobs);
} AudioFWTDNContext;
#define OFFSET(x) offsetof(AudioFWTDNContext, x)
#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define AFR AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption afwtdn_options[] = {
{ "sigma", "set noise sigma", OFFSET(sigma), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, AFR },
{ "levels", "set number of wavelet levels", OFFSET(levels), AV_OPT_TYPE_INT, {.i64=10}, 1, MAX_LEVELS-1, AF },
{ "wavet", "set wavelet type", OFFSET(wavelet_type), AV_OPT_TYPE_INT, {.i64=SYM10}, 0, NB_WAVELET_TYPES - 1, AF, .unit = "wavet" },
{ "sym2", "sym2", 0, AV_OPT_TYPE_CONST, {.i64=SYM2}, 0, 0, AF, .unit = "wavet" },
{ "sym4", "sym4", 0, AV_OPT_TYPE_CONST, {.i64=SYM4}, 0, 0, AF, .unit = "wavet" },
{ "rbior68", "rbior68", 0, AV_OPT_TYPE_CONST, {.i64=RBIOR68}, 0, 0, AF, .unit = "wavet" },
{ "deb10", "deb10", 0, AV_OPT_TYPE_CONST, {.i64=DEB10}, 0, 0, AF, .unit = "wavet" },
{ "sym10", "sym10", 0, AV_OPT_TYPE_CONST, {.i64=SYM10}, 0, 0, AF, .unit = "wavet" },
{ "coif5", "coif5", 0, AV_OPT_TYPE_CONST, {.i64=COIF5}, 0, 0, AF, .unit = "wavet" },
{ "bl3", "bl3", 0, AV_OPT_TYPE_CONST, {.i64=BL3}, 0, 0, AF, .unit = "wavet" },
{ "percent", "set percent of full denoising", OFFSET(percent),AV_OPT_TYPE_DOUBLE, {.dbl=85}, 0, 100, AFR },
{ "profile", "profile noise", OFFSET(need_profile), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, AFR },
{ "adaptive", "adaptive profiling of noise", OFFSET(adaptive), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, AFR },
{ "samples", "set frame size in number of samples", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=8192}, 512, 65536, AF },
{ "softness", "set thresholding softness", OFFSET(softness), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 10, AFR },
{ NULL }
};
AVFILTER_DEFINE_CLASS(afwtdn);
#define pow2(x) (1U << (x))
#define mod_pow2(x, power_of_two) ((x) & ((power_of_two) - 1))
static void conv_down(double *in, int in_length, double *low, double *high,
int out_length, const double *lp, const double *hp,
int wavelet_length, int skip,
double *buffer, int buffer_length)
{
double thigh = 0.0, tlow = 0.0;
int buff_idx = 1 + skip;
memcpy(buffer, in, buff_idx * sizeof(*buffer));
memset(buffer + buff_idx, 0, (buffer_length - buff_idx) * sizeof(*buffer));
for (int i = 0; i < out_length - 1; i++) {
double thigh = 0.0, tlow = 0.0;
for (int j = 0; j < wavelet_length; j++) {
const int idx = mod_pow2(-j + buff_idx - 1, buffer_length);
const double btemp = buffer[idx];
thigh += btemp * hp[j];
tlow += btemp * lp[j];
}
high[i] = thigh;
low[i] = tlow;
buffer[buff_idx++] = in[2 * i + 1 + skip];
buffer[buff_idx++] = in[2 * i + 2 + skip];
buff_idx = mod_pow2(buff_idx, buffer_length);
}
for (int i = 0; i < wavelet_length; i++) {
const int idx = mod_pow2(-i + buff_idx - 1, buffer_length);
const double btemp = buffer[idx];
thigh += btemp * hp[i];
tlow += btemp * lp[i];
}
high[out_length - 1] = thigh;
low[out_length - 1] = tlow;
}
static int left_ext(int wavelet_length, int levels, uint64_t sn)
{
if (!sn)
return 0;
return (pow2(levels) - 1) * (wavelet_length - 2) + mod_pow2(sn, pow2(levels));
}
static int nb_coefs(int length, int level, uint64_t sn)
{
const int pow2_level = pow2(level);
return (sn + length) / pow2_level - sn / pow2_level;
}
static int reallocate_inputs(double **out, int *out_length,
int in_length, int levels, int ch, uint64_t sn)
{
const int temp_length = nb_coefs(in_length, levels, sn);
for (int level = 0; level < levels; level++) {
const int temp_length = nb_coefs(in_length, level + 1, sn);
if (temp_length > out_length[level]) {
av_freep(&out[level]);
out_length[level] = 0;
out[level] = av_calloc(temp_length + 1, sizeof(**out));
if (!out[level])
return AVERROR(ENOMEM);
out_length[level] = temp_length + 1;
}
memset(out[level] + temp_length, 0,
(out_length[level] - temp_length) * sizeof(**out));
out_length[level] = temp_length;
}
if (temp_length > out_length[levels]) {
av_freep(&out[levels]);
out_length[levels] = 0;
out[levels] = av_calloc(temp_length + 1, sizeof(**out));
if (!out[levels])
return AVERROR(ENOMEM);
out_length[levels] = temp_length + 1;
}
memset(out[levels] + temp_length, 0,
(out_length[levels] - temp_length) * sizeof(**out));
out_length[levels] = temp_length;
return 0;
}
static int max_left_zeros_inverse(int levels, int level, int wavelet_length)
{
return (pow2(levels - level) - 1) * (wavelet_length - 1);
}
static int reallocate_outputs(AudioFWTDNContext *s,
double **out, int *out_length,
int in_length, int levels, int ch, uint64_t sn)
{
ChannelParams *cp = &s->cp[ch];
int temp_length = 0;
int add = 0;
for (int level = 0; level < levels; level++) {
temp_length = nb_coefs(in_length, level + 1, sn);
if (temp_length > out_length[level]) {
av_freep(&cp->subbands_to_free[level]);
out_length[level] = 0;
add = max_left_zeros_inverse(levels, level + 1, s->wavelet_length);
cp->subbands_to_free[level] = av_calloc(add + temp_length + 1, sizeof(**out));
if (!cp->subbands_to_free[level])
return AVERROR(ENOMEM);
out_length[level] = add + temp_length + 1;
out[level] = cp->subbands_to_free[level] + add;
}
memset(out[level] + temp_length, 0,
FFMAX(out_length[level] - temp_length - add, 0) * sizeof(**out));
out_length[level] = temp_length;
}
temp_length = nb_coefs(in_length, levels, sn);
if (temp_length > out_length[levels]) {
av_freep(&cp->subbands_to_free[levels]);
out_length[levels] = 0;
cp->subbands_to_free[levels] = av_calloc(temp_length + 1, sizeof(**out));
if (!cp->subbands_to_free[levels])
return AVERROR(ENOMEM);
out_length[levels] = temp_length + 1;
out[levels] = cp->subbands_to_free[levels];
}
memset(out[levels] + temp_length, 0,
(out_length[levels] - temp_length) * sizeof(**out));
out_length[levels] = temp_length;
return 0;
}
static int discard_left_ext(int wavelet_length, int levels, int level, uint64_t sn)
{
if (levels == level || sn == 0)
return 0;
return (pow2(levels - level) - 1) * (wavelet_length - 2) + mod_pow2(sn, pow2(levels)) / pow2(level);
}
static int forward(AudioFWTDNContext *s,
const double *in, int in_length,
double **out, int *out_length, int ch, uint64_t sn)
{
ChannelParams *cp = &s->cp[ch];
int levels = s->levels;
int skip = sn ? s->wavelet_length - 1 : 1;
int leftext, ret;
ret = reallocate_inputs(out, out_length, in_length, levels, ch, sn);
if (ret < 0)
return ret;
ret = reallocate_outputs(s, cp->filter_coefs, cp->filter_length,
in_length, levels, ch, sn);
if (ret < 0)
return ret;
leftext = left_ext(s->wavelet_length, levels, sn);
if (cp->temp_in_max_length < in_length + cp->max_left_ext + skip) {
av_freep(&cp->temp_in);
cp->temp_in_max_length = in_length + cp->max_left_ext + skip;
cp->temp_in = av_calloc(cp->temp_in_max_length, sizeof(*cp->temp_in));
if (!cp->temp_in) {
cp->temp_in_max_length = 0;
return AVERROR(ENOMEM);
}
}
memset(cp->temp_in, 0, cp->temp_in_max_length * sizeof(*cp->temp_in));
cp->temp_in_length = in_length + leftext;
if (leftext)
memcpy(cp->temp_in, cp->prev + s->prev_length - leftext, leftext * sizeof(*cp->temp_in));
memcpy(cp->temp_in + leftext, in, in_length * sizeof(*in));
if (levels == 1) {
conv_down(cp->temp_in, cp->temp_in_length, out[1], out[0], out_length[1],
s->lp, s->hp, s->wavelet_length, skip,
cp->buffer, cp->buffer_length);
} else {
int discard = discard_left_ext(s->wavelet_length, levels, 1, sn);
int tempa_length_prev;
if (cp->tempa_len_max < (in_length + cp->max_left_ext + s->wavelet_length - 1) / 2) {
av_freep(&cp->tempa);
av_freep(&cp->tempd);
cp->tempa_len_max = (in_length + cp->max_left_ext + s->wavelet_length - 1) / 2;
cp->tempa = av_calloc(cp->tempa_len_max, sizeof(*cp->tempa));
cp->tempd = av_calloc(cp->tempa_len_max, sizeof(*cp->tempd));
if (!cp->tempa || !cp->tempd) {
cp->tempa_len_max = 0;
return AVERROR(ENOMEM);
}
}
memset(cp->tempa, 0, cp->tempa_len_max * sizeof(*cp->tempa));
memset(cp->tempd, 0, cp->tempa_len_max * sizeof(*cp->tempd));
cp->tempa_length = out_length[0] + discard;
conv_down(cp->temp_in, cp->temp_in_length,
cp->tempa, cp->tempd, cp->tempa_length,
s->lp, s->hp, s->wavelet_length, skip,
cp->buffer, cp->buffer_length);
memcpy(out[0], cp->tempd + discard, out_length[0] * sizeof(**out));
tempa_length_prev = cp->tempa_length;
for (int level = 1; level < levels - 1; level++) {
if (out_length[level] == 0)
return 0;
discard = discard_left_ext(s->wavelet_length, levels, level + 1, sn);
cp->tempa_length = out_length[level] + discard;
conv_down(cp->tempa, tempa_length_prev,
cp->tempa, cp->tempd, cp->tempa_length,
s->lp, s->hp, s->wavelet_length, skip,
cp->buffer, cp->buffer_length);
memcpy(out[level], cp->tempd + discard, out_length[level] * sizeof(**out));
tempa_length_prev = cp->tempa_length;
}
if (out_length[levels] == 0)
return 0;
conv_down(cp->tempa, cp->tempa_length, out[levels], out[levels - 1], out_length[levels],
s->lp, s->hp, s->wavelet_length, skip,
cp->buffer, cp->buffer_length);
}
if (s->prev_length < in_length) {
memcpy(cp->prev, in + in_length - cp->max_left_ext, cp->max_left_ext * sizeof(*cp->prev));
} else {
memmove(cp->prev, cp->prev + in_length, (s->prev_length - in_length) * sizeof(*cp->prev));
memcpy(cp->prev + s->prev_length - in_length, in, in_length * sizeof(*cp->prev));
}
return 0;
}
static void conv_up(double *low, double *high, int in_length, double *out, int out_length,
const double *lp, const double *hp, int filter_length,
double *buffer, double *buffer2, int buffer_length)
{
int shift = 0, buff_idx = 0, in_idx = 0;
memset(buffer, 0, buffer_length * sizeof(*buffer));
memset(buffer2, 0, buffer_length * sizeof(*buffer2));
for (int i = 0; i < out_length; i++) {
double sum = 0.0;
if ((i & 1) == 0) {
if (in_idx < in_length) {
buffer[buff_idx] = low[in_idx];
buffer2[buff_idx] = high[in_idx++];
} else {
buffer[buff_idx] = 0;
buffer2[buff_idx] = 0;
}
buff_idx++;
if (buff_idx >= buffer_length)
buff_idx = 0;
shift = 0;
}
for (int j = 0; j < (filter_length - shift + 1) / 2; j++) {
const int idx = mod_pow2(-j + buff_idx - 1, buffer_length);
sum += buffer[idx] * lp[j * 2 + shift] + buffer2[idx] * hp[j * 2 + shift];
}
out[i] = sum;
shift = 1;
}
}
static int append_left_ext(int wavelet_length, int levels, int level, uint64_t sn)
{
if (levels == level)
return 0;
return (pow2(levels - level) - 1) * (wavelet_length - 2) +
mod_pow2(sn, pow2(levels)) / pow2(level);
}
static int inverse(AudioFWTDNContext *s,
double **in, int *in_length,
double *out, int out_length, int ch, uint64_t sn)
{
ChannelParams *cp = &s->cp[ch];
const int levels = s->levels;
int leftext = left_ext(s->wavelet_length, levels, sn);
int temp_skip = 0;
if (sn == 0)
temp_skip = cp->min_left_ext;
memset(out, 0, out_length * sizeof(*out));
if (cp->temp_in_max_length < out_length + cp->max_left_ext + s->wavelet_length - 1) {
av_freep(&cp->temp_in);
cp->temp_in_max_length = out_length + cp->max_left_ext + s->wavelet_length - 1;
cp->temp_in = av_calloc(cp->temp_in_max_length, sizeof(*cp->temp_in));
if (!cp->temp_in) {
cp->temp_in_max_length = 0;
return AVERROR(ENOMEM);
}
}
memset(cp->temp_in, 0, cp->temp_in_max_length * sizeof(*cp->temp_in));
cp->temp_in_length = out_length + cp->max_left_ext;
if (levels == 1) {
conv_up(in[1], in[0], in_length[1], cp->temp_in, cp->temp_in_length,
s->ilp, s->ihp, s->wavelet_length,
cp->buffer, cp->buffer2, cp->buffer_length);
memcpy(out + cp->max_left_ext - leftext, cp->temp_in + temp_skip,
FFMAX(0, out_length - (cp->max_left_ext - leftext)) * sizeof(*out));
} else {
double *hp1, *hp2;
int add, add2;
if (cp->tempa_len_max < (out_length + cp->max_left_ext + s->wavelet_length - 1) / 2) {
av_freep(&cp->tempa);
cp->tempa_len_max = (out_length + cp->max_left_ext + s->wavelet_length - 1) / 2;
cp->tempa = av_calloc(cp->tempa_len_max, sizeof(*cp->tempa));
if (!cp->tempa) {
cp->tempa_len_max = 0;
return AVERROR(ENOMEM);
}
}
memset(cp->tempa, 0, cp->tempa_len_max * sizeof(*cp->tempa));
hp1 = levels & 1 ? cp->temp_in : cp->tempa;
hp2 = levels & 1 ? cp->tempa : cp->temp_in;
add = append_left_ext(s->wavelet_length, levels, levels - 1, sn);
conv_up(in[levels], in[levels - 1], in_length[levels], hp1, in_length[levels - 2] + add,
s->ilp, s->ihp, s->wavelet_length, cp->buffer, cp->buffer2, cp->buffer_length);
for (int level = levels - 1; level > 1; level--) {
add2 = append_left_ext(s->wavelet_length, levels, level - 1, sn);
add = append_left_ext(s->wavelet_length, levels, level, sn);
conv_up(hp1, in[level - 1] - add, in_length[level - 1] + add,
hp2, in_length[level - 2] + add2,
s->ilp, s->ihp, s->wavelet_length,
cp->buffer, cp->buffer2, cp->buffer_length);
FFSWAP(double *, hp1, hp2);
}
add = append_left_ext(s->wavelet_length, levels, 1, sn);
conv_up(hp1, in[0] - add, in_length[0] + add, cp->temp_in, cp->temp_in_length,
s->ilp, s->ihp, s->wavelet_length,
cp->buffer, cp->buffer2, cp->buffer_length);
}
memset(cp->temp_in, 0, temp_skip * sizeof(*cp->temp_in));
if (s->overlap_length <= out_length) {
memcpy(out + cp->max_left_ext - leftext, cp->temp_in + temp_skip,
FFMAX(0, out_length - (cp->max_left_ext - leftext)) * sizeof(*out));
for (int i = 0;i < FFMIN(s->overlap_length, out_length); i++)
out[i] += cp->overlap[i];
memcpy(cp->overlap, cp->temp_in + out_length - (cp->max_left_ext - leftext),
s->overlap_length * sizeof(*cp->overlap));
} else {
for (int i = 0;i < s->overlap_length - (cp->max_left_ext - leftext); i++)
cp->overlap[i + cp->max_left_ext - leftext] += cp->temp_in[i];
memcpy(out, cp->overlap, out_length * sizeof(*out));
memmove(cp->overlap, cp->overlap + out_length,
(s->overlap_length - out_length) * sizeof(*cp->overlap));
memcpy(cp->overlap + s->overlap_length - out_length, cp->temp_in + leftext,
out_length * sizeof(*cp->overlap));
}
return 0;
}
static int next_pow2(int in)
{
return 1 << (av_log2(in) + 1);
}
static void denoise_level(double *out, const double *in,
const double *filter,
double percent, int length)
{
const double x = percent * 0.01;
const double y = 1.0 - x;
for (int i = 0; i < length; i++)
out[i] = x * filter[i] + in[i] * y;
}
static double sqr(double in)
{
return in * in;
}
static double measure_mean(const double *in, int length)
{
double sum = 0.0;
for (int i = 0; i < length; i++)
sum += in[i];
return sum / length;
}
static double measure_absmean(const double *in, int length)
{
double sum = 0.0;
for (int i = 0; i < length; i++)
sum += fabs(in[i]);
return sum / length;
}
static double measure_stddev(const double *in, int length, double mean)
{
double sum = 0.;
for (int i = 0; i < length; i++) {
sum += sqr(in[i] - mean);
}
return sqrt(sum / length);
}
static void noise_filter(const double stddev, const double *in,
double *out, double absmean, double softness,
double new_stddev, int length)
{
for (int i = 0; i < length; i++) {
if (new_stddev <= stddev)
out[i] = 0.0;
else if (fabs(in[i]) <= absmean)
out[i] = 0.0;
else
out[i] = in[i] - FFSIGN(in[i]) * absmean / exp(3.0 * softness * (fabs(in[i]) - absmean) / absmean);
}
}
typedef struct ThreadData {
AVFrame *in, *out;
} ThreadData;
static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
{
AudioFWTDNContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
ChannelParams *cp = &s->cp[ch];
const double *src = (const double *)(in->extended_data[ch]);
double *dst = (double *)out->extended_data[ch];
double *absmean = (double *)s->absmean->extended_data[ch];
double *new_absmean = (double *)s->new_absmean->extended_data[ch];
double *stddev = (double *)s->stddev->extended_data[ch];
double *new_stddev = (double *)s->new_stddev->extended_data[ch];
double *filter = (double *)s->filter->extended_data[ch];
double is_noise = 0.0;
int ret;
ret = forward(s, src, in->nb_samples, cp->output_coefs, cp->output_length, ch, s->sn);
if (ret < 0)
return ret;
if (!s->got_profile && s->need_profile) {
for (int level = 0; level <= s->levels; level++) {
const int length = cp->output_length[level];
const double scale = sqrt(2.0 * log(length));
stddev[level] = measure_stddev(cp->output_coefs[level], length,
measure_mean(cp->output_coefs[level], length)) * scale;
absmean[level] = measure_absmean(cp->output_coefs[level], length) * scale;
}
} else if (!s->got_profile && !s->need_profile && !s->adaptive) {
for (int level = 0; level <= s->levels; level++) {
const int length = cp->output_length[level];
const double scale = sqrt(2.0 * log(length));
stddev[level] = 0.5 * s->sigma * scale;
absmean[level] = 0.5 * s->sigma * scale;
}
}
for (int level = 0; level <= s->levels; level++) {
const int length = cp->output_length[level];
double vad;
new_stddev[level] = measure_stddev(cp->output_coefs[level], length,
measure_mean(cp->output_coefs[level], length));
new_absmean[level] = measure_absmean(cp->output_coefs[level], length);
if (new_absmean[level] <= FLT_EPSILON)
vad = 1.0;
else
vad = new_stddev[level] / new_absmean[level];
if (level < s->levels)
is_noise += sqr(vad - 1.232);
}
is_noise *= in->sample_rate;
is_noise /= s->nb_samples;
for (int level = 0; level <= s->levels; level++) {
const double percent = ctx->is_disabled ? 0. : s->percent;
const int length = cp->output_length[level];
const double scale = sqrt(2.0 * log(length));
if (is_noise < 0.05 && s->adaptive) {
stddev[level] = new_stddev[level] * scale;
absmean[level] = new_absmean[level] * scale;
}
noise_filter(stddev[level], cp->output_coefs[level], filter, absmean[level],
s->softness, new_stddev[level], length);
denoise_level(cp->filter_coefs[level], cp->output_coefs[level], filter, percent, length);
}
ret = inverse(s, cp->filter_coefs, cp->filter_length, dst, out->nb_samples, ch, s->sn);
if (ret < 0)
return ret;
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AudioFWTDNContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
ThreadData td;
AVFrame *out;
int eof = in == NULL;
out = ff_get_audio_buffer(outlink, s->nb_samples);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
if (in) {
av_frame_copy_props(out, in);
s->eof_pts = in->pts + in->nb_samples;
}
if (eof)
out->pts = s->eof_pts - s->padd_samples;
if (!in || in->nb_samples < s->nb_samples) {
AVFrame *new_in = ff_get_audio_buffer(outlink, s->nb_samples);
if (!new_in) {
av_frame_free(&in);
av_frame_free(&out);
return AVERROR(ENOMEM);
}
if (in)
av_frame_copy_props(new_in, in);
s->padd_samples -= s->nb_samples - (in ? in->nb_samples: 0);
if (in)
av_samples_copy(new_in->extended_data, in->extended_data, 0, 0,
in->nb_samples, in->ch_layout.nb_channels, in->format);
av_frame_free(&in);
in = new_in;
}
td.in = in;
td.out = out;
ff_filter_execute(ctx, s->filter_channel, &td, NULL, inlink->ch_layout.nb_channels);
if (s->need_profile)
s->got_profile = 1;
s->sn += s->nb_samples;
if (s->drop_samples >= in->nb_samples) {
s->drop_samples -= in->nb_samples;
s->delay += in->nb_samples;
av_frame_free(&in);
av_frame_free(&out);
FF_FILTER_FORWARD_STATUS(inlink, outlink);
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return 0;
} else if (s->drop_samples > 0) {
for (int ch = 0; ch < out->ch_layout.nb_channels; ch++) {
memmove(out->extended_data[ch],
out->extended_data[ch] + s->drop_samples * sizeof(double),
(in->nb_samples - s->drop_samples) * sizeof(double));
}
out->nb_samples = in->nb_samples - s->drop_samples;
out->pts = in->pts - av_rescale_q(s->delay, (AVRational){1, outlink->sample_rate}, outlink->time_base);
s->delay += s->drop_samples;
s->drop_samples = 0;
} else {
if (s->padd_samples < 0 && eof) {
out->nb_samples = FFMAX(0, out->nb_samples + s->padd_samples);
s->padd_samples = 0;
}
if (!eof)
out->pts = in->pts - av_rescale_q(s->delay, (AVRational){1, outlink->sample_rate}, outlink->time_base);
}
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static int max_left_ext(int wavelet_length, int levels)
{
return (pow2(levels) - 1) * (wavelet_length - 1);
}
static int min_left_ext(int wavelet_length, int levels)
{
return (pow2(levels) - 1) * (wavelet_length - 2);
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AudioFWTDNContext *s = ctx->priv;
switch (s->wavelet_type) {
case SYM2:
s->wavelet_length = 4;
s->lp = sym2_lp;
s->hp = sym2_hp;
s->ilp = sym2_ilp;
s->ihp = sym2_ihp;
break;
case SYM4:
s->wavelet_length = 8;
s->lp = sym4_lp;
s->hp = sym4_hp;
s->ilp = sym4_ilp;
s->ihp = sym4_ihp;
break;
case RBIOR68:
s->wavelet_length = 18;
s->lp = rbior68_lp;
s->hp = rbior68_hp;
s->ilp = rbior68_ilp;
s->ihp = rbior68_ihp;
break;
case DEB10:
s->wavelet_length = 20;
s->lp = deb10_lp;
s->hp = deb10_hp;
s->ilp = deb10_ilp;
s->ihp = deb10_ihp;
break;
case SYM10:
s->wavelet_length = 20;
s->lp = sym10_lp;
s->hp = sym10_hp;
s->ilp = sym10_ilp;
s->ihp = sym10_ihp;
break;
case COIF5:
s->wavelet_length = 30;
s->lp = coif5_lp;
s->hp = coif5_hp;
s->ilp = coif5_ilp;
s->ihp = coif5_ihp;
break;
case BL3:
s->wavelet_length = 42;
s->lp = bl3_lp;
s->hp = bl3_hp;
s->ilp = bl3_ilp;
s->ihp = bl3_ihp;
break;
default:
av_assert0(0);
}
s->levels = FFMIN(s->levels, lrint(log(s->nb_samples / (s->wavelet_length - 1.0)) / M_LN2));
av_log(ctx, AV_LOG_VERBOSE, "levels: %d\n", s->levels);
s->filter_channel = filter_channel;
s->stddev = ff_get_audio_buffer(outlink, MAX_LEVELS);
s->new_stddev = ff_get_audio_buffer(outlink, MAX_LEVELS);
s->filter = ff_get_audio_buffer(outlink, s->nb_samples);
s->absmean = ff_get_audio_buffer(outlink, MAX_LEVELS);
s->new_absmean = ff_get_audio_buffer(outlink, MAX_LEVELS);
if (!s->stddev || !s->absmean || !s->filter ||
!s->new_stddev || !s->new_absmean)
return AVERROR(ENOMEM);
s->channels = outlink->ch_layout.nb_channels;
s->overlap_length = max_left_ext(s->wavelet_length, s->levels);
s->prev_length = s->overlap_length;
s->drop_samples = s->overlap_length;
s->padd_samples = s->overlap_length;
s->sn = 1;
s->cp = av_calloc(s->channels, sizeof(*s->cp));
if (!s->cp)
return AVERROR(ENOMEM);
for (int ch = 0; ch < s->channels; ch++) {
ChannelParams *cp = &s->cp[ch];
cp->output_coefs = av_calloc(s->levels + 1, sizeof(*cp->output_coefs));
cp->filter_coefs = av_calloc(s->levels + 1, sizeof(*cp->filter_coefs));
cp->output_length = av_calloc(s->levels + 1, sizeof(*cp->output_length));
cp->filter_length = av_calloc(s->levels + 1, sizeof(*cp->filter_length));
cp->buffer_length = next_pow2(s->wavelet_length);
cp->buffer = av_calloc(cp->buffer_length, sizeof(*cp->buffer));
cp->buffer2 = av_calloc(cp->buffer_length, sizeof(*cp->buffer2));
cp->subbands_to_free = av_calloc(s->levels + 1, sizeof(*cp->subbands_to_free));
cp->prev = av_calloc(s->prev_length, sizeof(*cp->prev));
cp->overlap = av_calloc(s->overlap_length, sizeof(*cp->overlap));
cp->max_left_ext = max_left_ext(s->wavelet_length, s->levels);
cp->min_left_ext = min_left_ext(s->wavelet_length, s->levels);
if (!cp->output_coefs || !cp->filter_coefs || !cp->output_length ||
!cp->filter_length || !cp->subbands_to_free || !cp->prev || !cp->overlap ||
!cp->buffer || !cp->buffer2)
return AVERROR(ENOMEM);
}
return 0;
}
static int activate(AVFilterContext *ctx)
{
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
AudioFWTDNContext *s = ctx->priv;
AVFrame *in = NULL;
int ret, status;
int64_t pts;
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
if (!s->eof) {
ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
if (ret < 0)
return ret;
if (ret > 0)
return filter_frame(inlink, in);
}
if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
if (status == AVERROR_EOF)
s->eof = 1;
}
if (s->eof && s->padd_samples != 0) {
return filter_frame(inlink, NULL);
} else if (s->eof) {
ff_outlink_set_status(outlink, AVERROR_EOF, s->eof_pts);
return 0;
}
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return FFERROR_NOT_READY;
}
static av_cold void uninit(AVFilterContext *ctx)
{
AudioFWTDNContext *s = ctx->priv;
av_frame_free(&s->filter);
av_frame_free(&s->new_stddev);
av_frame_free(&s->stddev);
av_frame_free(&s->new_absmean);
av_frame_free(&s->absmean);
for (int ch = 0; s->cp && ch < s->channels; ch++) {
ChannelParams *cp = &s->cp[ch];
av_freep(&cp->tempa);
av_freep(&cp->tempd);
av_freep(&cp->temp_in);
av_freep(&cp->buffer);
av_freep(&cp->buffer2);
av_freep(&cp->prev);
av_freep(&cp->overlap);
av_freep(&cp->output_length);
av_freep(&cp->filter_length);
if (cp->output_coefs) {
for (int level = 0; level <= s->levels; level++)
av_freep(&cp->output_coefs[level]);
}
if (cp->subbands_to_free) {
for (int level = 0; level <= s->levels; level++)
av_freep(&cp->subbands_to_free[level]);
}
av_freep(&cp->subbands_to_free);
av_freep(&cp->output_coefs);
av_freep(&cp->filter_coefs);
}
av_freep(&s->cp);
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
AudioFWTDNContext *s = ctx->priv;
int ret;
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
if (ret < 0)
return ret;
if (!strcmp(cmd, "profile") && s->need_profile)
s->got_profile = 0;
return 0;
}
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = config_output,
},
};
const AVFilter ff_af_afwtdn = {
.name = "afwtdn",
.description = NULL_IF_CONFIG_SMALL("Denoise audio stream using Wavelets."),
.priv_size = sizeof(AudioFWTDNContext),
.priv_class = &afwtdn_class,
.activate = activate,
.uninit = uninit,
FILTER_INPUTS(ff_audio_default_filterpad),
FILTER_OUTPUTS(outputs),
FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_DBLP),
.process_command = process_command,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_SLICE_THREADS,
};
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