path: root/libavfilter/allfilters.c

/*
 * filter registration
 * Copyright (c) 2008 Vitor Sessak
 *
 * 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 "libavutil/thread.h"
#include "avfilter.h"
#include "config.h"

extern AVFilter ff_af_abench;
extern AVFilter ff_af_acompressor;
extern AVFilter ff_af_acontrast;
extern AVFilter ff_af_acopy;
extern AVFilter ff_af_acue;
extern AVFilter ff_af_acrossfade;
extern AVFilter ff_af_acrossover;
extern AVFilter ff_af_acrusher;
extern AVFilter ff_af_adeclick;
extern AVFilter ff_af_adeclip;
extern AVFilter ff_af_adelay;
extern AVFilter ff_af_adenorm;
extern AVFilter ff_af_aderivative;
extern AVFilter ff_af_aecho;
extern AVFilter ff_af_aemphasis;
extern AVFilter ff_af_aeval;
extern AVFilter ff_af_aexciter;
extern AVFilter ff_af_afade;
extern AVFilter ff_af_afftdn;
extern AVFilter ff_af_afftfilt;
extern AVFilter ff_af_afir;
extern AVFilter ff_af_aformat;
extern AVFilter ff_af_afreqshift;
extern AVFilter ff_af_agate;
extern AVFilter ff_af_aiir;
extern AVFilter ff_af_aintegral;
extern AVFilter ff_af_ainterleave;
extern AVFilter ff_af_alimiter;
extern AVFilter ff_af_allpass;
extern AVFilter ff_af_aloop;
extern AVFilter ff_af_amerge;
extern AVFilter ff_af_ametadata;
extern AVFilter ff_af_amix;
extern AVFilter ff_af_amultiply;
extern AVFilter ff_af_anequalizer;
extern AVFilter ff_af_anlmdn;
extern AVFilter ff_af_anlms;
extern AVFilter ff_af_anull;
extern AVFilter ff_af_apad;
extern AVFilter ff_af_aperms;
extern AVFilter ff_af_aphaser;
extern AVFilter ff_af_aphaseshift;
extern AVFilter ff_af_apulsator;
extern AVFilter ff_af_arealtime;
extern AVFilter ff_af_aresample;
extern AVFilter ff_af_areverse;
extern AVFilter ff_af_arnndn;
extern AVFilter ff_af_aselect;
extern AVFilter ff_af_asendcmd;
extern AVFilter ff_af_asetnsamples;
extern AVFilter ff_af_asetpts;
extern AVFilter ff_af_asetrate;
extern AVFilter ff_af_asettb;
extern AVFilter ff_af_ashowinfo;
extern AVFilter ff_af_asidedata;
extern AVFilter ff_af_asoftclip;
extern AVFilter ff_af_asplit;
extern AVFilter ff_af_asr;
extern AVFilter ff_af_astats;
extern AVFilter ff_af_astreamselect;
extern AVFilter ff_af_asubboost;
extern AVFilter ff_af_asubcut;
extern AVFilter ff_af_asupercut;
extern AVFilter ff_af_asuperpass;
extern AVFilter ff_af_asuperstop;
extern AVFilter ff_af_atempo;
extern AVFilter ff_af_atrim;
extern AVFilter ff_af_axcorrelate;
extern AVFilter ff_af_azmq;
extern AVFilter ff_af_bandpass;
extern AVFilter ff_af_bandreject;
extern AVFilter ff_af_bass;
extern AVFilter ff_af_biquad;
extern AVFilter ff_af_bs2b;
extern AVFilter ff_vf_chromaber_vulkan;
extern AVFilter ff_af_channelmap;
extern AVFilter ff_af_channelsplit;
extern AVFilter ff_af_chorus;
extern AVFilter ff_af_compand;
extern AVFilter ff_af_compensationdelay;
extern AVFilter ff_af_crossfeed;
extern AVFilter ff_af_crystalizer;
extern AVFilter ff_af_dcshift;
extern AVFilter ff_af_deesser;
extern AVFilter ff_af_drmeter;
extern AVFilter ff_af_dynaudnorm;
extern AVFilter ff_af_earwax;
extern AVFilter ff_af_ebur128;
extern AVFilter ff_af_equalizer;
extern AVFilter ff_af_extrastereo;
extern AVFilter ff_af_firequalizer;
extern AVFilter ff_af_flanger;
extern AVFilter ff_af_haas;
extern AVFilter ff_af_hdcd;
extern AVFilter ff_af_headphone;
extern AVFilter ff_af_highpass;
extern AVFilter ff_af_highshelf;
extern AVFilter ff_af_join;
extern AVFilter ff_af_ladspa;
extern AVFilter ff_af_loudnorm;
extern AVFilter ff_af_lowpass;
extern AVFilter ff_af_lowshelf;
extern AVFilter ff_af_lv2;
extern AVFilter ff_af_mcompand;
extern AVFilter ff_af_pan;
extern AVFilter ff_af_replaygain;
extern AVFilter ff_af_resample;
extern AVFilter ff_af_rubberband;
extern AVFilter ff_af_sidechaincompress;
extern AVFilter ff_af_sidechaingate;
extern AVFilter ff_af_silencedetect;
extern AVFilter ff_af_silenceremove;
extern AVFilter ff_af_sofalizer;
extern AVFilter ff_af_speechnorm;
extern AVFilter ff_af_stereotools;
extern AVFilter ff_af_stereowiden;
extern AVFilter ff_af_superequalizer;
extern AVFilter ff_af_surround;
extern AVFilter ff_af_treble;
extern AVFilter ff_af_tremolo;
extern AVFilter ff_af_vibrato;
extern AVFilter ff_af_volume;
extern AVFilter ff_af_volumedetect;

extern AVFilter ff_asrc_aevalsrc;
extern AVFilter ff_asrc_afirsrc;
extern AVFilter ff_asrc_anoisesrc;
extern AVFilter ff_asrc_anullsrc;
extern AVFilter ff_asrc_flite;
extern AVFilter ff_asrc_hilbert;
extern AVFilter ff_asrc_sinc;
extern AVFilter ff_asrc_sine;

extern AVFilter ff_asink_anullsink;

extern AVFilter ff_vf_addroi;
extern AVFilter ff_vf_alphaextract;
extern AVFilter ff_vf_alphamerge;
extern AVFilter ff_vf_amplify;
extern AVFilter ff_vf_ass;
extern AVFilter ff_vf_atadenoise;
extern AVFilter ff_vf_avgblur;
extern AVFilter ff_vf_avgblur_opencl;
extern AVFilter ff_vf_avgblur_vulkan;
extern AVFilter ff_vf_bbox;
extern AVFilter ff_vf_bench;
extern AVFilter ff_vf_bilateral;
extern AVFilter ff_vf_bitplanenoise;
extern AVFilter ff_vf_blackdetect;
extern AVFilter ff_vf_blackframe;
extern AVFilter ff_vf_blend;
extern AVFilter ff_vf_bm3d;
extern AVFilter ff_vf_boxblur;
extern AVFilter ff_vf_boxblur_opencl;
extern AVFilter ff_vf_bwdif;
extern AVFilter ff_vf_cas;
extern AVFilter ff_vf_chromahold;
extern AVFilter ff_vf_chromakey;
extern AVFilter ff_vf_chromanr;
extern AVFilter ff_vf_chromashift;
extern AVFilter ff_vf_ciescope;
extern AVFilter ff_vf_codecview;
extern AVFilter ff_vf_colorbalance;
extern AVFilter ff_vf_colorchannelmixer;
extern AVFilter ff_vf_colorcontrast;
extern AVFilter ff_vf_colorcorrect;
extern AVFilter ff_vf_colorize;
extern AVFilter ff_vf_colorkey;
extern AVFilter ff_vf_colorkey_opencl;
extern AVFilter ff_vf_colorhold;
extern AVFilter ff_vf_colorlevels;
extern AVFilter ff_vf_colormatrix;
extern AVFilter ff_vf_colorspace;
extern AVFilter ff_vf_colortemperature;
extern AVFilter ff_vf_convolution;
extern AVFilter ff_vf_convolution_opencl;
extern AVFilter ff_vf_convolve;
extern AVFilter ff_vf_copy;
extern AVFilter ff_vf_coreimage;
extern AVFilter ff_vf_cover_rect;
extern AVFilter ff_vf_crop;
extern AVFilter ff_vf_cropdetect;
extern AVFilter ff_vf_cue;
extern AVFilter ff_vf_curves;
extern AVFilter ff_vf_datascope;
extern AVFilter ff_vf_dblur;
extern AVFilter ff_vf_dctdnoiz;
extern AVFilter ff_vf_deband;
extern AVFilter ff_vf_deblock;
extern AVFilter ff_vf_decimate;
extern AVFilter ff_vf_deconvolve;
extern AVFilter ff_vf_dedot;
extern AVFilter ff_vf_deflate;
extern AVFilter ff_vf_deflicker;
extern AVFilter ff_vf_deinterlace_qsv;
extern AVFilter ff_vf_deinterlace_vaapi;
extern AVFilter ff_vf_dejudder;
extern AVFilter ff_vf_delogo;
extern AVFilter ff_vf_denoise_vaapi;
extern AVFilter ff_vf_derain;
extern AVFilter ff_vf_deshake;
extern AVFilter ff_vf_deshake_opencl;
extern AVFilter ff_vf_despill;
extern AVFilter ff_vf_detelecine;
extern AVFilter ff_vf_dilation;
extern AVFilter ff_vf_dilation_opencl;
extern AVFilter ff_vf_displace;
extern AVFilter ff_vf_dnn_processing;
extern AVFilter ff_vf_doubleweave;
extern AVFilter ff_vf_drawbox;
extern AVFilter ff_vf_drawgraph;
extern AVFilter ff_vf_drawgrid;
extern AVFilter ff_vf_drawtext;
extern AVFilter ff_vf_edgedetect;
extern AVFilter ff_vf_elbg;
extern AVFilter ff_vf_entropy;
extern AVFilter ff_vf_epx;
extern AVFilter ff_vf_eq;
extern AVFilter ff_vf_erosion;
extern AVFilter ff_vf_erosion_opencl;
extern AVFilter ff_vf_estdif;
extern AVFilter ff_vf_exposure;
extern AVFilter ff_vf_extractplanes;
extern AVFilter ff_vf_fade;
extern AVFilter ff_vf_fftdnoiz;
extern AVFilter ff_vf_fftfilt;
extern AVFilter ff_vf_field;
extern AVFilter ff_vf_fieldhint;
extern AVFilter ff_vf_fieldmatch;
extern AVFilter ff_vf_fieldorder;
extern AVFilter ff_vf_fillborders;
extern AVFilter ff_vf_find_rect;
extern AVFilter ff_vf_floodfill;
extern AVFilter ff_vf_format;
extern AVFilter ff_vf_fps;
extern AVFilter ff_vf_framepack;
extern AVFilter ff_vf_framerate;
extern AVFilter ff_vf_framestep;
extern AVFilter ff_vf_freezedetect;
extern AVFilter ff_vf_freezeframes;
extern AVFilter ff_vf_frei0r;
extern AVFilter ff_vf_fspp;
extern AVFilter ff_vf_gblur;
extern AVFilter ff_vf_geq;
extern AVFilter ff_vf_gradfun;
extern AVFilter ff_vf_graphmonitor;
extern AVFilter ff_vf_greyedge;
extern AVFilter ff_vf_haldclut;
extern AVFilter ff_vf_hflip;
extern AVFilter ff_vf_histeq;
extern AVFilter ff_vf_histogram;
extern AVFilter ff_vf_hqdn3d;
extern AVFilter ff_vf_hqx;
extern AVFilter ff_vf_hstack;
extern AVFilter ff_vf_hue;
extern AVFilter ff_vf_hwdownload;
extern AVFilter ff_vf_hwmap;
extern AVFilter ff_vf_hwupload;
extern AVFilter ff_vf_hwupload_cuda;
extern AVFilter ff_vf_hysteresis;
extern AVFilter ff_vf_idet;
extern AVFilter ff_vf_il;
extern AVFilter ff_vf_inflate;
extern AVFilter ff_vf_interlace;
extern AVFilter ff_vf_interleave;
extern AVFilter ff_vf_kerndeint;
extern AVFilter ff_vf_kirsch;
extern AVFilter ff_vf_lagfun;
extern AVFilter ff_vf_lenscorrection;
extern AVFilter ff_vf_lensfun;
extern AVFilter ff_vf_libvmaf;
extern AVFilter ff_vf_limiter;
extern AVFilter ff_vf_loop;
extern AVFilter ff_vf_lumakey;
extern AVFilter ff_vf_lut;
extern AVFilter ff_vf_lut1d;
extern AVFilter ff_vf_lut2;
extern AVFilter ff_vf_lut3d;
extern AVFilter ff_vf_lutrgb;
extern AVFilter ff_vf_lutyuv;
extern AVFilter ff_vf_maskedclamp;
extern AVFilter ff_vf_maskedmax;
extern AVFilter ff_vf_maskedmerge;
extern AVFilter ff_vf_maskedmin;
extern AVFilter ff_vf_maskedthreshold;
extern AVFilter ff_vf_maskfun;
extern AVFilter ff_vf_mcdeint;
extern AVFilter ff_vf_median;
extern AVFilter ff_vf_mergeplanes;
extern AVFilter ff_vf_mestimate;
extern AVFilter ff_vf_metadata;
extern AVFilter ff_vf_midequalizer;
extern AVFilter ff_vf_minterpolate;
extern AVFilter ff_vf_mix;
extern AVFilter ff_vf_monochrome;
extern AVFilter ff_vf_mpdecimate;
extern AVFilter ff_vf_negate;
extern AVFilter ff_vf_nlmeans;
extern AVFilter ff_vf_nlmeans_opencl;
extern AVFilter ff_vf_nnedi;
extern AVFilter ff_vf_noformat;
extern AVFilter ff_vf_noise;
extern AVFilter ff_vf_normalize;
extern AVFilter ff_vf_null;
extern AVFilter ff_vf_ocr;
extern AVFilter ff_vf_ocv;
extern AVFilter ff_vf_oscilloscope;
extern AVFilter ff_vf_overlay;
extern AVFilter ff_vf_overlay_opencl;
extern AVFilter ff_vf_overlay_qsv;
extern AVFilter ff_vf_overlay_vulkan;
extern AVFilter ff_vf_overlay_cuda;
extern AVFilter ff_vf_owdenoise;
extern AVFilter ff_vf_pad;
extern AVFilter ff_vf_pad_opencl;
extern AVFilter ff_vf_palettegen;
extern AVFilter ff_vf_paletteuse;
extern AVFilter ff_vf_perms;
extern AVFilter ff_vf_perspective;
extern AVFilter ff_vf_phase;
extern AVFilter ff_vf_photosensitivity;
extern AVFilter ff_vf_pixdesctest;
extern AVFilter ff_vf_pixscope;
extern AVFilter ff_vf_pp;
extern AVFilter ff_vf_pp7;
extern AVFilter ff_vf_premultiply;
extern AVFilter ff_vf_prewitt;
extern AVFilter ff_vf_prewitt_opencl;
extern AVFilter ff_vf_procamp_vaapi;
extern AVFilter ff_vf_program_opencl;
extern AVFilter ff_vf_pseudocolor;
extern AVFilter ff_vf_psnr;
extern AVFilter ff_vf_pullup;
extern AVFilter ff_vf_qp;
extern AVFilter ff_vf_random;
extern AVFilter ff_vf_readeia608;
extern AVFilter ff_vf_readvitc;
extern AVFilter ff_vf_realtime;
extern AVFilter ff_vf_remap;
extern AVFilter ff_vf_removegrain;
extern AVFilter ff_vf_removelogo;
extern AVFilter ff_vf_repeatfields;
extern AVFilter ff_vf_reverse;
extern AVFilter ff_vf_rgbashift;
extern AVFilter ff_vf_roberts;
extern AVFilter ff_vf_roberts_opencl;
extern AVFilter ff_vf_rotate;
extern AVFilter ff_vf_sab;
extern AVFilter ff_vf_scale;
extern AVFilter ff_vf_scale_cuda;
extern AVFilter ff_vf_scale_npp;
extern AVFilter ff_vf_scale_qsv;
extern AVFilter ff_vf_scale_vaapi;
extern AVFilter ff_vf_scale_vulkan;
extern AVFilter ff_vf_scale2ref;
extern AVFilter ff_vf_scdet;
extern AVFilter ff_vf_scroll;
extern AVFilter ff_vf_select;
extern AVFilter ff_vf_selectivecolor;
extern AVFilter ff_vf_sendcmd;
extern AVFilter ff_vf_separatefields;
extern AVFilter ff_vf_setdar;
extern AVFilter ff_vf_setfield;
extern AVFilter ff_vf_setparams;
extern AVFilter ff_vf_setpts;
extern AVFilter ff_vf_setrange;
extern AVFilter ff_vf_setsar;
extern AVFilter ff_vf_settb;
extern AVFilter ff_vf_sharpness_vaapi;
extern AVFilter ff_vf_shear;
extern AVFilter ff_vf_showinfo;
extern AVFilter ff_vf_showpalette;
extern AVFilter ff_vf_shuffleframes;
extern AVFilter ff_vf_shufflepixels;
extern AVFilter ff_vf_shuffleplanes;
extern AVFilter ff_vf_sidedata;
extern AVFilter ff_vf_signalstats;
extern AVFilter ff_vf_signature;
extern AVFilter ff_vf_smartblur;
extern AVFilter ff_vf_sobel;
extern AVFilter ff_vf_sobel_opencl;
extern AVFilter ff_vf_split;
extern AVFilter ff_vf_spp;
extern AVFilter ff_vf_sr;
extern AVFilter ff_vf_ssim;
extern AVFilter ff_vf_stereo3d;
extern AVFilter ff_vf_streamselect;
extern AVFilter ff_vf_subtitles;
extern AVFilter ff_vf_super2xsai;
extern AVFilter ff_vf_swaprect;
extern AVFilter ff_vf_swapuv;
extern AVFilter ff_vf_tblend;
extern AVFilter ff_vf_telecine;
extern AVFilter ff_vf_thistogram;
extern AVFilter ff_vf_threshold;
extern AVFilter ff_vf_thumbnail;
extern AVFilter ff_vf_thumbnail_cuda;
extern AVFilter ff_vf_tile;
extern AVFilter ff_vf_tinterlace;
extern AVFilter ff_vf_tlut2;
extern AVFilter ff_vf_tmedian;
extern AVFilter ff_vf_tmidequalizer;
extern AVFilter ff_vf_tmix;
extern AVFilter ff_vf_tonemap;
extern AVFilter ff_vf_tonemap_opencl;
extern AVFilter ff_vf_tonemap_vaapi;
extern AVFilter ff_vf_tpad;
extern AVFilter ff_vf_transpose;
extern AVFilter ff_vf_transpose_npp;
extern AVFilter ff_vf_transpose_opencl;
extern AVFilter ff_vf_transpose_vaapi;
extern AVFilter ff_vf_trim;
extern AVFilter ff_vf_unpremultiply;
extern AVFilter ff_vf_unsharp;
extern AVFilter ff_vf_unsharp_opencl;
extern AVFilter ff_vf_untile;
extern AVFilter ff_vf_uspp;
extern AVFilter ff_vf_v360;
extern AVFilter ff_vf_vaguedenoiser;
extern AVFilter ff_vf_vectorscope;
extern AVFilter ff_vf_vflip;
extern AVFilter ff_vf_vfrdet;
extern AVFilter ff_vf_vibrance;
extern AVFilter ff_vf_vidstabdetect;
extern AVFilter ff_vf_vidstabtransform;
extern AVFilter ff_vf_vif;
extern AVFilter ff_vf_vignette;
extern AVFilter ff_vf_vmafmotion;
extern AVFilter ff_vf_vpp_qsv;
extern AVFilter ff_vf_vstack;
extern AVFilter ff_vf_w3fdif;
extern AVFilter ff_vf_waveform;
extern AVFilter ff_vf_weave;
extern AVFilter ff_vf_xbr;
extern AVFilter ff_vf_xfade;
extern AVFilter ff_vf_xfade_opencl;
extern AVFilter ff_vf_xmedian;
extern AVFilter ff_vf_xstack;
extern AVFilter ff_vf_yadif;
extern AVFilter ff_vf_yadif_cuda;
extern AVFilter ff_vf_yaepblur;
extern AVFilter ff_vf_zmq;
extern AVFilter ff_vf_zoompan;
extern AVFilter ff_vf_zscale;

extern AVFilter ff_vsrc_allrgb;
extern AVFilter ff_vsrc_allyuv;
extern AVFilter ff_vsrc_cellauto;
extern AVFilter ff_vsrc_color;
extern AVFilter ff_vsrc_coreimagesrc;
extern AVFilter ff_vsrc_frei0r_src;
extern AVFilter ff_vsrc_gradients;
extern AVFilter ff_vsrc_haldclutsrc;
extern AVFilter ff_vsrc_life;
extern AVFilter ff_vsrc_mandelbrot;
extern AVFilter ff_vsrc_mptestsrc;
extern AVFilter ff_vsrc_nullsrc;
extern AVFilter ff_vsrc_openclsrc;
extern AVFilter ff_vsrc_pal75bars;
extern AVFilter ff_vsrc_pal100bars;
extern AVFilter ff_vsrc_rgbtestsrc;
extern AVFilter ff_vsrc_sierpinski;
extern AVFilter ff_vsrc_smptebars;
extern AVFilter ff_vsrc_smptehdbars;
extern AVFilter ff_vsrc_testsrc;
extern AVFilter ff_vsrc_testsrc2;
extern AVFilter ff_vsrc_yuvtestsrc;

extern AVFilter ff_vsink_nullsink;

/* multimedia filters */
extern AVFilter ff_avf_abitscope;
extern AVFilter ff_avf_adrawgraph;
extern AVFilter ff_avf_agraphmonitor;
extern AVFilter ff_avf_ahistogram;
extern AVFilter ff_avf_aphasemeter;
extern AVFilter ff_avf_avectorscope;
extern AVFilter ff_avf_concat;
extern AVFilter ff_avf_showcqt;
extern AVFilter ff_avf_showfreqs;
extern AVFilter ff_avf_showspatial;
extern AVFilter ff_avf_showspectrum;
extern AVFilter ff_avf_showspectrumpic;
extern AVFilter ff_avf_showvolume;
extern AVFilter ff_avf_showwaves;
extern AVFilter ff_avf_showwavespic;
extern AVFilter ff_vaf_spectrumsynth;

/* multimedia sources */
extern AVFilter ff_avsrc_amovie;
extern AVFilter ff_avsrc_movie;

/* those filters are part of public or internal API,
 * they are formatted to not be found by the grep
 * as they are manually added again (due to their 'names'
 * being the same while having different 'types'). */
extern  AVFilter ff_asrc_abuffer;
extern  AVFilter ff_vsrc_buffer;
extern  AVFilter ff_asink_abuffer;
extern  AVFilter ff_vsink_buffer;
extern AVFilter ff_af_afifo;
extern AVFilter ff_vf_fifo;

#include "libavfilter/filter_list.c"


const AVFilter *av_filter_iterate(void **opaque)
{
    uintptr_t i = (uintptr_t)*opaque;
    const AVFilter *f = filter_list[i];

    if (f)
        *opaque = (void*)(i + 1);

    return f;
}

const AVFilter *avfilter_get_by_name(const char *name)
{
    const AVFilter *f = NULL;
    void *opaque = 0;

    if (!name)
        return NULL;

    while ((f = av_filter_iterate(&opaque)))
        if (!strcmp(f->name, name))
            return f;

    return NULL;
}


#if FF_API_NEXT
FF_DISABLE_DEPRECATION_WARNINGS
static AVOnce av_filter_next_init = AV_ONCE_INIT;

static void av_filter_init_next(void)
{
    AVFilter *prev = NULL, *p;
    void *i = 0;
    while ((p = (AVFilter*)av_filter_iterate(&i))) {
        if (prev)
            prev->next = p;
        prev = p;
    }
}

void avfilter_register_all(void)
{
    ff_thread_once(&av_filter_next_init, av_filter_init_next);
}

int avfilter_register(AVFilter *filter)
{
    ff_thread_once(&av_filter_next_init, av_filter_init_next);

    return 0;
}

const AVFilter *avfilter_next(const AVFilter *prev)
{
    ff_thread_once(&av_filter_next_init, av_filter_init_next);

    return prev ? prev->next : filter_list[0];
}

FF_ENABLE_DEPRECATION_WARNINGS
#endif