FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavfilter/af_afreqshift.c	Lines:	0	173	0.0 %
Date:	2020-11-28 20:53:16	Branches:	0	50	0.0 %


/*
 * Copyright (c) Paul B Mahol
 * Copyright (c) Laurent de Soras, 2005
 *
 * 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/channel_layout.h"
#include "libavutil/ffmath.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "formats.h"

#define NB_COEFS 16

typedef struct AFreqShift {
    const AVClass *class;

    double shift;

    double c[NB_COEFS];

    int64_t in_samples;

    AVFrame *i1, *o1;
    AVFrame *i2, *o2;

    void (*filter_channel)(AVFilterContext *ctx,
                           int nb_samples,
                           int sample_rate,
                           const double *src, double *dst,
                           double *i1, double *o1,
                           double *i2, double *o2);
} AFreqShift;

static int query_formats(AVFilterContext *ctx)
{
    AVFilterFormats *formats = NULL;
    AVFilterChannelLayouts *layouts = NULL;
    static const enum AVSampleFormat sample_fmts[] = {
        AV_SAMPLE_FMT_DBLP,
        AV_SAMPLE_FMT_NONE
    };
    int ret;

    formats = ff_make_format_list(sample_fmts);
    if (!formats)
        return AVERROR(ENOMEM);
    ret = ff_set_common_formats(ctx, formats);
    if (ret < 0)
        return ret;

    layouts = ff_all_channel_counts();
    if (!layouts)
        return AVERROR(ENOMEM);

    ret = ff_set_common_channel_layouts(ctx, layouts);
    if (ret < 0)
        return ret;

    formats = ff_all_samplerates();
    return ff_set_common_samplerates(ctx, formats);
}

static void pfilter_channel(AVFilterContext *ctx,
                            int nb_samples,
                            int sample_rate,
                            const double *src, double *dst,
                            double *i1, double *o1,
                            double *i2, double *o2)
{
    AFreqShift *s = ctx->priv;
    double *c = s->c;
    double shift = s->shift * M_PI;
    double cos_theta = cos(shift);
    double sin_theta = sin(shift);

    for (int n = 0; n < nb_samples; n++) {
        double xn1 = src[n], xn2 = src[n];
        double I, Q;

        for (int j = 0; j < NB_COEFS / 2; j++) {
            I = c[j] * (xn1 + o2[j]) - i2[j];
            i2[j] = i1[j];
            i1[j] = xn1;
            o2[j] = o1[j];
            o1[j] = I;
            xn1 = I;
        }

        for (int j = NB_COEFS / 2; j < NB_COEFS; j++) {
            Q = c[j] * (xn2 + o2[j]) - i2[j];
            i2[j] = i1[j];
            i1[j] = xn2;
            o2[j] = o1[j];
            o1[j] = Q;
            xn2 = Q;
        }
        Q = o2[NB_COEFS - 1];

        dst[n] = I * cos_theta - Q * sin_theta;
    }
}

static void ffilter_channel(AVFilterContext *ctx,
                            int nb_samples,
                            int sample_rate,
                            const double *src, double *dst,
                            double *i1, double *o1,
                            double *i2, double *o2)
{
    AFreqShift *s = ctx->priv;
    double *c = s->c;
    double ts = 1. / sample_rate;
    double shift = s->shift;
    int64_t N = s->in_samples;

    for (int n = 0; n < nb_samples; n++) {
        double xn1 = src[n], xn2 = src[n];
        double I, Q, theta;

        for (int j = 0; j < NB_COEFS / 2; j++) {
            I = c[j] * (xn1 + o2[j]) - i2[j];
            i2[j] = i1[j];
            i1[j] = xn1;
            o2[j] = o1[j];
            o1[j] = I;
            xn1 = I;
        }

        for (int j = NB_COEFS / 2; j < NB_COEFS; j++) {
            Q = c[j] * (xn2 + o2[j]) - i2[j];
            i2[j] = i1[j];
            i1[j] = xn2;
            o2[j] = o1[j];
            o1[j] = Q;
            xn2 = Q;
        }
        Q = o2[NB_COEFS - 1];

        theta = 2. * M_PI * fmod(shift * (N + n) * ts, 1.);
        dst[n] = I * cos(theta) - Q * sin(theta);
    }
}

static void compute_transition_param(double *K, double *Q, double transition)
{
    double kksqrt, e, e2, e4, k, q;

    k  = tan((1. - transition * 2.) * M_PI / 4.);
    k *= k;
    kksqrt = pow(1 - k * k, 0.25);
    e = 0.5 * (1. - kksqrt) / (1. + kksqrt);
    e2 = e * e;
    e4 = e2 * e2;
    q = e * (1. + e4 * (2. + e4 * (15. + 150. * e4)));

    *Q = q;
    *K = k;
}

static double ipowp(double x, int64_t n)
{
    double z = 1.;

    while (n != 0) {
        if (n & 1)
            z *= x;
        n >>= 1;
        x *= x;
    }

    return z;
}

static double compute_acc_num(double q, int order, int c)
{
    int64_t i = 0;
    int j = 1;
    double acc = 0.;
    double q_ii1;

    do {
        q_ii1  = ipowp(q, i * (i + 1));
        q_ii1 *= sin((i * 2 + 1) * c * M_PI / order) * j;
        acc   += q_ii1;

        j = -j;
        i++;
    } while (fabs(q_ii1) > 1e-100);

    return acc;
}

static double compute_acc_den(double q, int order, int c)
{
    int64_t i = 1;
    int j = -1;
    double acc = 0.;
    double q_i2;

    do {
        q_i2  = ipowp(q, i * i);
        q_i2 *= cos(i * 2 * c * M_PI / order) * j;
        acc  += q_i2;

        j = -j;
        i++;
    } while (fabs(q_i2) > 1e-100);

    return acc;
}

static double compute_coef(int index, double k, double q, int order)
{
    const int    c    = index + 1;
    const double num  = compute_acc_num(q, order, c) * pow(q, 0.25);
    const double den  = compute_acc_den(q, order, c) + 0.5;
    const double ww   = num / den;
    const double wwsq = ww * ww;

    const double x    = sqrt((1 - wwsq * k) * (1 - wwsq / k)) / (1 + wwsq);
    const double coef = (1 - x) / (1 + x);

    return coef;
}

static void compute_coefs(double *coef_arr, int nbr_coefs, double transition)
{
    const int order = nbr_coefs * 2 + 1;
    double k, q;

    compute_transition_param(&k, &q, transition);

    for (int n = 0; n < nbr_coefs; n++)
        coef_arr[(n / 2) + (n & 1) * nbr_coefs / 2] = compute_coef(n, k, q, order);
}

static int config_input(AVFilterLink *inlink)
{
    AVFilterContext *ctx = inlink->dst;
    AFreqShift *s = ctx->priv;

    compute_coefs(s->c, NB_COEFS, 2. * 20. / inlink->sample_rate);

    s->i1 = ff_get_audio_buffer(inlink, NB_COEFS);
    s->o1 = ff_get_audio_buffer(inlink, NB_COEFS);
    s->i2 = ff_get_audio_buffer(inlink, NB_COEFS);
    s->o2 = ff_get_audio_buffer(inlink, NB_COEFS);
    if (!s->i1 || !s->o1 || !s->i2 || !s->o2)
        return AVERROR(ENOMEM);

    if (!strcmp(ctx->filter->name, "afreqshift"))
        s->filter_channel = ffilter_channel;
    else
        s->filter_channel = pfilter_channel;

    return 0;
}

typedef struct ThreadData {
    AVFrame *in, *out;
} ThreadData;

static int filter_channels(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
    AFreqShift *s = ctx->priv;
    ThreadData *td = arg;
    AVFrame *out = td->out;
    AVFrame *in = td->in;
    const int start = (in->channels * jobnr) / nb_jobs;
    const int end = (in->channels * (jobnr+1)) / nb_jobs;

    for (int ch = start; ch < end; ch++) {
        s->filter_channel(ctx, in->nb_samples,
                          in->sample_rate,
                          (const double *)in->extended_data[ch],
                          (double *)out->extended_data[ch],
                          (double *)s->i1->extended_data[ch],
                          (double *)s->o1->extended_data[ch],
                          (double *)s->i2->extended_data[ch],
                          (double *)s->o2->extended_data[ch]);
    }

    return 0;
}

static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
    AVFilterContext *ctx = inlink->dst;
    AVFilterLink *outlink = ctx->outputs[0];
    AFreqShift *s = ctx->priv;
    AVFrame *out;
    ThreadData td;

    if (av_frame_is_writable(in)) {
        out = in;
    } else {
        out = ff_get_audio_buffer(outlink, in->nb_samples);
        if (!out) {
            av_frame_free(&in);
            return AVERROR(ENOMEM);
        }
        av_frame_copy_props(out, in);
    }

    td.in = in; td.out = out;
    ctx->internal->execute(ctx, filter_channels, &td, NULL, FFMIN(inlink->channels,
                                                            ff_filter_get_nb_threads(ctx)));

    s->in_samples += in->nb_samples;

    if (out != in)
        av_frame_free(&in);
    return ff_filter_frame(outlink, out);
}

static av_cold void uninit(AVFilterContext *ctx)
{
    AFreqShift *s = ctx->priv;

    av_frame_free(&s->i1);
    av_frame_free(&s->o1);
    av_frame_free(&s->i2);
    av_frame_free(&s->o2);
}

#define OFFSET(x) offsetof(AFreqShift, x)
#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

static const AVOption afreqshift_options[] = {
    { "shift", "set frequency shift", OFFSET(shift), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -INT_MAX, INT_MAX, FLAGS },
    { NULL }
};

AVFILTER_DEFINE_CLASS(afreqshift);

static const AVFilterPad inputs[] = {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .filter_frame = filter_frame,
        .config_props = config_input,
    },
    { NULL }
};

static const AVFilterPad outputs[] = {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_AUDIO,
    },
    { NULL }
};

AVFilter ff_af_afreqshift = {
    .name            = "afreqshift",
    .description     = NULL_IF_CONFIG_SMALL("Apply frequency shifting to input audio."),
    .query_formats   = query_formats,
    .priv_size       = sizeof(AFreqShift),
    .priv_class      = &afreqshift_class,
    .uninit          = uninit,
    .inputs          = inputs,
    .outputs         = outputs,
    .process_command = ff_filter_process_command,
    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC |
                       AVFILTER_FLAG_SLICE_THREADS,
};

static const AVOption aphaseshift_options[] = {
    { "shift", "set phase shift", OFFSET(shift), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1.0, 1.0, FLAGS },
    { NULL }
};

AVFILTER_DEFINE_CLASS(aphaseshift);

AVFilter ff_af_aphaseshift = {
    .name            = "aphaseshift",
    .description     = NULL_IF_CONFIG_SMALL("Apply phase shifting to input audio."),
    .query_formats   = query_formats,
    .priv_size       = sizeof(AFreqShift),
    .priv_class      = &aphaseshift_class,
    .uninit          = uninit,
    .inputs          = inputs,
    .outputs         = outputs,
    .process_command = ff_filter_process_command,
    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC |
                       AVFILTER_FLAG_SLICE_THREADS,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) Paul B Mahol
3			* Copyright (c) Laurent de Soras, 2005
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			#include "libavutil/channel_layout.h"
23			#include "libavutil/ffmath.h"
24			#include "libavutil/opt.h"
25			#include "avfilter.h"
26			#include "audio.h"
27			#include "formats.h"
28
29			#define NB_COEFS 16
30
31			typedef struct AFreqShift {
32			const AVClass *class;
33
34			double shift;
35
36			double c[NB_COEFS];
37
38			int64_t in_samples;
39
40			AVFrame i1, o1;
41			AVFrame i2, o2;
42
43			void (filter_channel)(AVFilterContext ctx,
44			int nb_samples,
45			int sample_rate,
46			const double src, double dst,
47			double i1, double o1,
48			double i2, double o2);
49			} AFreqShift;
50
51			static int query_formats(AVFilterContext *ctx)
52			{
53			AVFilterFormats *formats = NULL;
54			AVFilterChannelLayouts *layouts = NULL;
55			static const enum AVSampleFormat sample_fmts[] = {
56			AV_SAMPLE_FMT_DBLP,
57			AV_SAMPLE_FMT_NONE
58			};
59			int ret;
60
61			formats = ff_make_format_list(sample_fmts);
62			if (!formats)
63			return AVERROR(ENOMEM);
64			ret = ff_set_common_formats(ctx, formats);
65			if (ret < 0)
66			return ret;
67
68			layouts = ff_all_channel_counts();
69			if (!layouts)
70			return AVERROR(ENOMEM);
71
72			ret = ff_set_common_channel_layouts(ctx, layouts);
73			if (ret < 0)
74			return ret;
75
76			formats = ff_all_samplerates();
77			return ff_set_common_samplerates(ctx, formats);
78			}
79
80			static void pfilter_channel(AVFilterContext *ctx,
81			int nb_samples,
82			int sample_rate,
83			const double src, double dst,
84			double i1, double o1,
85			double i2, double o2)
86			{
87			AFreqShift *s = ctx->priv;
88			double *c = s->c;
89			double shift = s->shift * M_PI;
90			double cos_theta = cos(shift);
91			double sin_theta = sin(shift);
92
93			for (int n = 0; n < nb_samples; n++) {
94			double xn1 = src[n], xn2 = src[n];
95			double I, Q;
96
97			for (int j = 0; j < NB_COEFS / 2; j++) {
98			I = c[j] * (xn1 + o2[j]) - i2[j];
99			i2[j] = i1[j];
100			i1[j] = xn1;
101			o2[j] = o1[j];
102			o1[j] = I;
103			xn1 = I;
104			}
105
106			for (int j = NB_COEFS / 2; j < NB_COEFS; j++) {
107			Q = c[j] * (xn2 + o2[j]) - i2[j];
108			i2[j] = i1[j];
109			i1[j] = xn2;
110			o2[j] = o1[j];
111			o1[j] = Q;
112			xn2 = Q;
113			}
114			Q = o2[NB_COEFS - 1];
115
116			dst[n] = I * cos_theta - Q * sin_theta;
117			}
118			}
119
120			static void ffilter_channel(AVFilterContext *ctx,
121			int nb_samples,
122			int sample_rate,
123			const double src, double dst,
124			double i1, double o1,
125			double i2, double o2)
126			{
127			AFreqShift *s = ctx->priv;
128			double *c = s->c;
129			double ts = 1. / sample_rate;
130			double shift = s->shift;
131			int64_t N = s->in_samples;
132
133			for (int n = 0; n < nb_samples; n++) {
134			double xn1 = src[n], xn2 = src[n];
135			double I, Q, theta;
136
137			for (int j = 0; j < NB_COEFS / 2; j++) {
138			I = c[j] * (xn1 + o2[j]) - i2[j];
139			i2[j] = i1[j];
140			i1[j] = xn1;
141			o2[j] = o1[j];
142			o1[j] = I;
143			xn1 = I;
144			}
145
146			for (int j = NB_COEFS / 2; j < NB_COEFS; j++) {
147			Q = c[j] * (xn2 + o2[j]) - i2[j];
148			i2[j] = i1[j];
149			i1[j] = xn2;
150			o2[j] = o1[j];
151			o1[j] = Q;
152			xn2 = Q;
153			}
154			Q = o2[NB_COEFS - 1];
155
156			theta = 2. * M_PI * fmod(shift * (N + n) * ts, 1.);
157			dst[n] = I * cos(theta) - Q * sin(theta);
158			}
159			}
160
161			static void compute_transition_param(double K, double Q, double transition)
162			{
163			double kksqrt, e, e2, e4, k, q;
164
165			k = tan((1. - transition * 2.) * M_PI / 4.);
166			k *= k;
167			kksqrt = pow(1 - k * k, 0.25);
168			e = 0.5 * (1. - kksqrt) / (1. + kksqrt);
169			e2 = e * e;
170			e4 = e2 * e2;
171			q = e * (1. + e4 * (2. + e4 * (15. + 150. * e4)));
172
173			*Q = q;
174			*K = k;
175			}
176
177			static double ipowp(double x, int64_t n)
178			{
179			double z = 1.;
180
181			while (n != 0) {
182			if (n & 1)
183			z *= x;
184			n >>= 1;
185			x *= x;
186			}
187
188			return z;
189			}
190
191			static double compute_acc_num(double q, int order, int c)
192			{
193			int64_t i = 0;
194			int j = 1;
195			double acc = 0.;
196			double q_ii1;
197
198			do {
199			q_ii1 = ipowp(q, i * (i + 1));
200			q_ii1 = sin((i 2 + 1) * c * M_PI / order) * j;
201			acc += q_ii1;
202
203			j = -j;
204			i++;
205			} while (fabs(q_ii1) > 1e-100);
206
207			return acc;
208			}
209
210			static double compute_acc_den(double q, int order, int c)
211			{
212			int64_t i = 1;
213			int j = -1;
214			double acc = 0.;
215			double q_i2;
216
217			do {
218			q_i2 = ipowp(q, i * i);
219			q_i2 = cos(i 2 * c * M_PI / order) * j;
220			acc += q_i2;
221
222			j = -j;
223			i++;
224			} while (fabs(q_i2) > 1e-100);
225
226			return acc;
227			}
228
229			static double compute_coef(int index, double k, double q, int order)
230			{
231			const int c = index + 1;
232			const double num = compute_acc_num(q, order, c) * pow(q, 0.25);
233			const double den = compute_acc_den(q, order, c) + 0.5;
234			const double ww = num / den;
235			const double wwsq = ww * ww;
236
237			const double x = sqrt((1 - wwsq * k) * (1 - wwsq / k)) / (1 + wwsq);
238			const double coef = (1 - x) / (1 + x);
239
240			return coef;
241			}
242
243			static void compute_coefs(double *coef_arr, int nbr_coefs, double transition)
244			{
245			const int order = nbr_coefs * 2 + 1;
246			double k, q;
247
248			compute_transition_param(&k, &q, transition);
249
250			for (int n = 0; n < nbr_coefs; n++)
251			coef_arr[(n / 2) + (n & 1) * nbr_coefs / 2] = compute_coef(n, k, q, order);
252			}
253
254			static int config_input(AVFilterLink *inlink)
255			{
256			AVFilterContext *ctx = inlink->dst;
257			AFreqShift *s = ctx->priv;
258
259			compute_coefs(s->c, NB_COEFS, 2. * 20. / inlink->sample_rate);
260
261			s->i1 = ff_get_audio_buffer(inlink, NB_COEFS);
262			s->o1 = ff_get_audio_buffer(inlink, NB_COEFS);
263			s->i2 = ff_get_audio_buffer(inlink, NB_COEFS);
264			s->o2 = ff_get_audio_buffer(inlink, NB_COEFS);
265			if (!s->i1 \|\| !s->o1 \|\| !s->i2 \|\| !s->o2)
266			return AVERROR(ENOMEM);
267
268			if (!strcmp(ctx->filter->name, "afreqshift"))
269			s->filter_channel = ffilter_channel;
270			else
271			s->filter_channel = pfilter_channel;
272
273			return 0;
274			}
275
276			typedef struct ThreadData {
277			AVFrame in, out;
278			} ThreadData;
279
280			static int filter_channels(AVFilterContext ctx, void arg, int jobnr, int nb_jobs)
281			{
282			AFreqShift *s = ctx->priv;
283			ThreadData *td = arg;
284			AVFrame *out = td->out;
285			AVFrame *in = td->in;
286			const int start = (in->channels * jobnr) / nb_jobs;
287			const int end = (in->channels * (jobnr+1)) / nb_jobs;
288
289			for (int ch = start; ch < end; ch++) {
290			s->filter_channel(ctx, in->nb_samples,
291			in->sample_rate,
292			(const double *)in->extended_data[ch],
293			(double *)out->extended_data[ch],
294			(double *)s->i1->extended_data[ch],
295			(double *)s->o1->extended_data[ch],
296			(double *)s->i2->extended_data[ch],
297			(double *)s->o2->extended_data[ch]);
298			}
299
300			return 0;
301			}
302
303			static int filter_frame(AVFilterLink inlink, AVFrame in)
304			{
305			AVFilterContext *ctx = inlink->dst;
306			AVFilterLink *outlink = ctx->outputs[0];
307			AFreqShift *s = ctx->priv;
308			AVFrame *out;
309			ThreadData td;
310
311			if (av_frame_is_writable(in)) {
312			out = in;
313			} else {
314			out = ff_get_audio_buffer(outlink, in->nb_samples);
315			if (!out) {
316			av_frame_free(&in);
317			return AVERROR(ENOMEM);
318			}
319			av_frame_copy_props(out, in);
320			}
321
322			td.in = in; td.out = out;
323			ctx->internal->execute(ctx, filter_channels, &td, NULL, FFMIN(inlink->channels,
324			ff_filter_get_nb_threads(ctx)));
325
326			s->in_samples += in->nb_samples;
327
328			if (out != in)
329			av_frame_free(&in);
330			return ff_filter_frame(outlink, out);
331			}
332
333			static av_cold void uninit(AVFilterContext *ctx)
334			{
335			AFreqShift *s = ctx->priv;
336
337			av_frame_free(&s->i1);
338			av_frame_free(&s->o1);
339			av_frame_free(&s->i2);
340			av_frame_free(&s->o2);
341			}
342
343			#define OFFSET(x) offsetof(AFreqShift, x)
344			#define FLAGS AV_OPT_FLAG_AUDIO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_RUNTIME_PARAM
345
346			static const AVOption afreqshift_options[] = {
347			{ "shift", "set frequency shift", OFFSET(shift), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -INT_MAX, INT_MAX, FLAGS },
348			{ NULL }
349			};
350
351			AVFILTER_DEFINE_CLASS(afreqshift);
352
353			static const AVFilterPad inputs[] = {
354			{
355			.name = "default",
356			.type = AVMEDIA_TYPE_AUDIO,
357			.filter_frame = filter_frame,
358			.config_props = config_input,
359			},
360			{ NULL }
361			};
362
363			static const AVFilterPad outputs[] = {
364			{
365			.name = "default",
366			.type = AVMEDIA_TYPE_AUDIO,
367			},
368			{ NULL }
369			};
370
371			AVFilter ff_af_afreqshift = {
372			.name = "afreqshift",
373			.description = NULL_IF_CONFIG_SMALL("Apply frequency shifting to input audio."),
374			.query_formats = query_formats,
375			.priv_size = sizeof(AFreqShift),
376			.priv_class = &afreqshift_class,
377			.uninit = uninit,
378			.inputs = inputs,
379			.outputs = outputs,
380			.process_command = ff_filter_process_command,
381			.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC \|
382			AVFILTER_FLAG_SLICE_THREADS,
383			};
384
385			static const AVOption aphaseshift_options[] = {
386			{ "shift", "set phase shift", OFFSET(shift), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1.0, 1.0, FLAGS },
387			{ NULL }
388			};
389
390			AVFILTER_DEFINE_CLASS(aphaseshift);
391
392			AVFilter ff_af_aphaseshift = {
393			.name = "aphaseshift",
394			.description = NULL_IF_CONFIG_SMALL("Apply phase shifting to input audio."),
395			.query_formats = query_formats,
396			.priv_size = sizeof(AFreqShift),
397			.priv_class = &aphaseshift_class,
398			.uninit = uninit,
399			.inputs = inputs,
400			.outputs = outputs,
401			.process_command = ff_filter_process_command,
402			.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC \|
403			AVFILTER_FLAG_SLICE_THREADS,
404			};