FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavfilter/af_vibrato.c	Lines:	0	78	0.0 %
Date:	2021-01-20 23:14:43	Branches:	0	38	0.0 %


/*
 * Copyright (c) 2015 Kyle Swanson <k@ylo.ph>.
 *
 * 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/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "audio.h"
#include "generate_wave_table.h"

typedef struct VibratoContext {
    const AVClass *class;
    double freq;
    double depth;
    int channels;

    double **buf;
    int buf_index;
    int buf_size;

    double *wave_table;
    int wave_table_index;
    int wave_table_size;
} VibratoContext;

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

static const AVOption vibrato_options[] = {
    { "f", "set frequency in hertz",    OFFSET(freq),    AV_OPT_TYPE_DOUBLE,   {.dbl = 5.0},   0.1,   20000.0, FLAGS },
    { "d", "set depth as percentage",   OFFSET(depth),   AV_OPT_TYPE_DOUBLE,   {.dbl = 0.5},   0.00,  1.0,     FLAGS },
    { NULL }
};

AVFILTER_DEFINE_CLASS(vibrato);

static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
    AVFilterContext *ctx = inlink->dst;
    VibratoContext *s = ctx->priv;
    AVFilterLink *outlink = ctx->outputs[0];
    AVFrame *out;
    int n, c;
    const double *src;
    double *dst;

    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);
    }


    for (n = 0; n < in->nb_samples; n++) {
        double integer, decimal;
        decimal = modf(s->depth * s->wave_table[s->wave_table_index], &integer);

        s->wave_table_index++;
        if (s->wave_table_index >= s->wave_table_size)
            s->wave_table_index -= s->wave_table_size;

        for (c = 0; c < inlink->channels; c++) {
            int samp1_index, samp2_index;
            double *buf;
            double this_samp;

            src = (const double *)in->extended_data[c];
            dst = (double *)out->extended_data[c];
            buf = s->buf[c];

            samp1_index = s->buf_index + integer;
            if (samp1_index >= s->buf_size)
                samp1_index -= s->buf_size;
            samp2_index = samp1_index + 1;
            if (samp2_index >= s->buf_size)
                samp2_index -= s->buf_size;

            this_samp = src[n];
            dst[n] = buf[samp1_index] + (decimal * (buf[samp2_index] - buf[samp1_index]));
            buf[s->buf_index] = this_samp;
        }
        s->buf_index++;
        if (s->buf_index >= s->buf_size)
            s->buf_index -= s->buf_size;
    }

    if (in != out)
        av_frame_free(&in);

    return ff_filter_frame(outlink, out);
}

static int query_formats(AVFilterContext *ctx)
{
    AVFilterFormats *formats;
    AVFilterChannelLayouts *layouts;
    static const enum AVSampleFormat sample_fmts[] = {
        AV_SAMPLE_FMT_DBLP,
        AV_SAMPLE_FMT_NONE
    };
    int 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_make_format_list(sample_fmts);
    if (!formats)
        return AVERROR(ENOMEM);
    ret = ff_set_common_formats(ctx, formats);
    if (ret < 0)
        return ret;

    formats = ff_all_samplerates();
    if (!formats)
        return AVERROR(ENOMEM);
    return ff_set_common_samplerates(ctx, formats);
}

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

    av_freep(&s->wave_table);
    for (c = 0; c < s->channels; c++)
        av_freep(&s->buf[c]);
    av_freep(&s->buf);
}

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

    s->buf = av_calloc(inlink->channels, sizeof(*s->buf));
    if (!s->buf)
        return AVERROR(ENOMEM);
    s->buf_size = lrint(inlink->sample_rate * 0.005 + 0.5);
    for (c = 0; c < s->channels; c++) {
        s->buf[c] = av_malloc_array(s->buf_size, sizeof(*s->buf[c]));
        if (!s->buf[c])
            return AVERROR(ENOMEM);
    }
    s->buf_index = 0;

    s->wave_table_size = lrint(inlink->sample_rate / s->freq + 0.5);
    s->wave_table = av_malloc_array(s->wave_table_size, sizeof(*s->wave_table));
    if (!s->wave_table)
        return AVERROR(ENOMEM);
    ff_generate_wave_table(WAVE_SIN, AV_SAMPLE_FMT_DBL, s->wave_table, s->wave_table_size, 0.0, s->buf_size - 1, 3.0 * M_PI_2);
    s->wave_table_index = 0;

    return 0;
}

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

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

AVFilter ff_af_vibrato = {
    .name          = "vibrato",
    .description   = NULL_IF_CONFIG_SMALL("Apply vibrato effect."),
    .priv_size     = sizeof(VibratoContext),
    .priv_class    = &vibrato_class,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = avfilter_af_vibrato_inputs,
    .outputs       = avfilter_af_vibrato_outputs,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2015 Kyle Swanson <k@ylo.ph>.
3			*
4			* This file is part of FFmpeg.
5			*
6			* FFmpeg is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10			*
11			* FFmpeg is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15			*
16			* You should have received a copy of the GNU Lesser General Public
17			* License along with FFmpeg; if not, write to the Free Software
18			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19			*/
20
21			#include "libavutil/opt.h"
22			#include "avfilter.h"
23			#include "internal.h"
24			#include "audio.h"
25			#include "generate_wave_table.h"
26
27			typedef struct VibratoContext {
28			const AVClass *class;
29			double freq;
30			double depth;
31			int channels;
32
33			double **buf;
34			int buf_index;
35			int buf_size;
36
37			double *wave_table;
38			int wave_table_index;
39			int wave_table_size;
40			} VibratoContext;
41
42			#define OFFSET(x) offsetof(VibratoContext, x)
43			#define FLAGS AV_OPT_FLAG_AUDIO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM
44
45			static const AVOption vibrato_options[] = {
46			{ "f", "set frequency in hertz", OFFSET(freq), AV_OPT_TYPE_DOUBLE, {.dbl = 5.0}, 0.1, 20000.0, FLAGS },
47			{ "d", "set depth as percentage", OFFSET(depth), AV_OPT_TYPE_DOUBLE, {.dbl = 0.5}, 0.00, 1.0, FLAGS },
48			{ NULL }
49			};
50
51			AVFILTER_DEFINE_CLASS(vibrato);
52
53			static int filter_frame(AVFilterLink inlink, AVFrame in)
54			{
55			AVFilterContext *ctx = inlink->dst;
56			VibratoContext *s = ctx->priv;
57			AVFilterLink *outlink = ctx->outputs[0];
58			AVFrame *out;
59			int n, c;
60			const double *src;
61			double *dst;
62
63			if (av_frame_is_writable(in)) {
64			out = in;
65			} else {
66			out = ff_get_audio_buffer(outlink, in->nb_samples);
67			if (!out) {
68			av_frame_free(&in);
69			return AVERROR(ENOMEM);
70			}
71			av_frame_copy_props(out, in);
72			}
73
74
75			for (n = 0; n < in->nb_samples; n++) {
76			double integer, decimal;
77			decimal = modf(s->depth * s->wave_table[s->wave_table_index], &integer);
78
79			s->wave_table_index++;
80			if (s->wave_table_index >= s->wave_table_size)
81			s->wave_table_index -= s->wave_table_size;
82
83			for (c = 0; c < inlink->channels; c++) {
84			int samp1_index, samp2_index;
85			double *buf;
86			double this_samp;
87
88			src = (const double *)in->extended_data[c];
89			dst = (double *)out->extended_data[c];
90			buf = s->buf[c];
91
92			samp1_index = s->buf_index + integer;
93			if (samp1_index >= s->buf_size)
94			samp1_index -= s->buf_size;
95			samp2_index = samp1_index + 1;
96			if (samp2_index >= s->buf_size)
97			samp2_index -= s->buf_size;
98
99			this_samp = src[n];
100			dst[n] = buf[samp1_index] + (decimal * (buf[samp2_index] - buf[samp1_index]));
101			buf[s->buf_index] = this_samp;
102			}
103			s->buf_index++;
104			if (s->buf_index >= s->buf_size)
105			s->buf_index -= s->buf_size;
106			}
107
108			if (in != out)
109			av_frame_free(&in);
110
111			return ff_filter_frame(outlink, out);
112			}
113
114			static int query_formats(AVFilterContext *ctx)
115			{
116			AVFilterFormats *formats;
117			AVFilterChannelLayouts *layouts;
118			static const enum AVSampleFormat sample_fmts[] = {
119			AV_SAMPLE_FMT_DBLP,
120			AV_SAMPLE_FMT_NONE
121			};
122			int ret;
123
124			layouts = ff_all_channel_counts();
125			if (!layouts)
126			return AVERROR(ENOMEM);
127			ret = ff_set_common_channel_layouts(ctx, layouts);
128			if (ret < 0)
129			return ret;
130
131			formats = ff_make_format_list(sample_fmts);
132			if (!formats)
133			return AVERROR(ENOMEM);
134			ret = ff_set_common_formats(ctx, formats);
135			if (ret < 0)
136			return ret;
137
138			formats = ff_all_samplerates();
139			if (!formats)
140			return AVERROR(ENOMEM);
141			return ff_set_common_samplerates(ctx, formats);
142			}
143
144			static av_cold void uninit(AVFilterContext *ctx)
145			{
146			VibratoContext *s = ctx->priv;
147			int c;
148
149			av_freep(&s->wave_table);
150			for (c = 0; c < s->channels; c++)
151			av_freep(&s->buf[c]);
152			av_freep(&s->buf);
153			}
154
155			static int config_input(AVFilterLink *inlink)
156			{
157			int c;
158			AVFilterContext *ctx = inlink->dst;
159			VibratoContext *s = ctx->priv;
160			s->channels = inlink->channels;
161
162			s->buf = av_calloc(inlink->channels, sizeof(*s->buf));
163			if (!s->buf)
164			return AVERROR(ENOMEM);
165			s->buf_size = lrint(inlink->sample_rate * 0.005 + 0.5);
166			for (c = 0; c < s->channels; c++) {
167			s->buf[c] = av_malloc_array(s->buf_size, sizeof(*s->buf[c]));
168			if (!s->buf[c])
169			return AVERROR(ENOMEM);
170			}
171			s->buf_index = 0;
172
173			s->wave_table_size = lrint(inlink->sample_rate / s->freq + 0.5);
174			s->wave_table = av_malloc_array(s->wave_table_size, sizeof(*s->wave_table));
175			if (!s->wave_table)
176			return AVERROR(ENOMEM);
177			ff_generate_wave_table(WAVE_SIN, AV_SAMPLE_FMT_DBL, s->wave_table, s->wave_table_size, 0.0, s->buf_size - 1, 3.0 * M_PI_2);
178			s->wave_table_index = 0;
179
180			return 0;
181			}
182
183			static const AVFilterPad avfilter_af_vibrato_inputs[] = {
184			{
185			.name = "default",
186			.type = AVMEDIA_TYPE_AUDIO,
187			.config_props = config_input,
188			.filter_frame = filter_frame,
189			},
190			{ NULL }
191			};
192
193			static const AVFilterPad avfilter_af_vibrato_outputs[] = {
194			{
195			.name = "default",
196			.type = AVMEDIA_TYPE_AUDIO,
197			},
198			{ NULL }
199			};
200
201			AVFilter ff_af_vibrato = {
202			.name = "vibrato",
203			.description = NULL_IF_CONFIG_SMALL("Apply vibrato effect."),
204			.priv_size = sizeof(VibratoContext),
205			.priv_class = &vibrato_class,
206			.uninit = uninit,
207			.query_formats = query_formats,
208			.inputs = avfilter_af_vibrato_inputs,
209			.outputs = avfilter_af_vibrato_outputs,
210			};