GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/af_acontrast.c Lines: 0 74 0.0 %
Date: 2020-10-23 17:01:47 Branches: 0 35 0.0 %

Line Branch Exec Source
1
/*
2
 * Copyright (c) 2008 Rob Sykes
3
 * Copyright (c) 2017 Paul B Mahol
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/opt.h"
24
#include "avfilter.h"
25
#include "audio.h"
26
#include "formats.h"
27
28
typedef struct AudioContrastContext {
29
    const AVClass *class;
30
    float contrast;
31
    void (*filter)(void **dst, const void **src,
32
                   int nb_samples, int channels, float contrast);
33
} AudioContrastContext;
34
35
#define OFFSET(x) offsetof(AudioContrastContext, x)
36
#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
37
38
static const AVOption acontrast_options[] = {
39
    { "contrast", "set contrast", OFFSET(contrast), AV_OPT_TYPE_FLOAT, {.dbl=33}, 0, 100, A },
40
    { NULL }
41
};
42
43
AVFILTER_DEFINE_CLASS(acontrast);
44
45
static int query_formats(AVFilterContext *ctx)
46
{
47
    AVFilterFormats *formats = NULL;
48
    AVFilterChannelLayouts *layouts = NULL;
49
    static const enum AVSampleFormat sample_fmts[] = {
50
        AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP,
51
        AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP,
52
        AV_SAMPLE_FMT_NONE
53
    };
54
    int ret;
55
56
    formats = ff_make_format_list(sample_fmts);
57
    if (!formats)
58
        return AVERROR(ENOMEM);
59
    ret = ff_set_common_formats(ctx, formats);
60
    if (ret < 0)
61
        return ret;
62
63
    layouts = ff_all_channel_counts();
64
    if (!layouts)
65
        return AVERROR(ENOMEM);
66
67
    ret = ff_set_common_channel_layouts(ctx, layouts);
68
    if (ret < 0)
69
        return ret;
70
71
    formats = ff_all_samplerates();
72
    return ff_set_common_samplerates(ctx, formats);
73
}
74
75
static void filter_flt(void **d, const void **s,
76
                       int nb_samples, int channels,
77
                       float contrast)
78
{
79
    const float *src = s[0];
80
    float *dst = d[0];
81
    int n, c;
82
83
    for (n = 0; n < nb_samples; n++) {
84
        for (c = 0; c < channels; c++) {
85
            float d = src[c] * M_PI_2;
86
87
            dst[c] = sinf(d + contrast * sinf(d * 4));
88
        }
89
90
        dst += c;
91
        src += c;
92
    }
93
}
94
95
static void filter_dbl(void **d, const void **s,
96
                       int nb_samples, int channels,
97
                       float contrast)
98
{
99
    const double *src = s[0];
100
    double *dst = d[0];
101
    int n, c;
102
103
    for (n = 0; n < nb_samples; n++) {
104
        for (c = 0; c < channels; c++) {
105
            double d = src[c] * M_PI_2;
106
107
            dst[c] = sin(d + contrast * sin(d * 4));
108
        }
109
110
        dst += c;
111
        src += c;
112
    }
113
}
114
115
static void filter_fltp(void **d, const void **s,
116
                        int nb_samples, int channels,
117
                        float contrast)
118
{
119
    int n, c;
120
121
    for (c = 0; c < channels; c++) {
122
        const float *src = s[c];
123
        float *dst = d[c];
124
125
        for (n = 0; n < nb_samples; n++) {
126
            float d = src[n] * M_PI_2;
127
128
            dst[n] = sinf(d + contrast * sinf(d * 4));
129
        }
130
    }
131
}
132
133
static void filter_dblp(void **d, const void **s,
134
                        int nb_samples, int channels,
135
                        float contrast)
136
{
137
    int n, c;
138
139
    for (c = 0; c < channels; c++) {
140
        const double *src = s[c];
141
        double *dst = d[c];
142
143
        for (n = 0; n < nb_samples; n++) {
144
            double d = src[n] * M_PI_2;
145
146
            dst[n] = sin(d + contrast * sin(d * 4));
147
        }
148
    }
149
}
150
151
static int config_input(AVFilterLink *inlink)
152
{
153
    AVFilterContext *ctx = inlink->dst;
154
    AudioContrastContext *s    = ctx->priv;
155
156
    switch (inlink->format) {
157
    case AV_SAMPLE_FMT_FLT:  s->filter = filter_flt;  break;
158
    case AV_SAMPLE_FMT_DBL:  s->filter = filter_dbl;  break;
159
    case AV_SAMPLE_FMT_FLTP: s->filter = filter_fltp; break;
160
    case AV_SAMPLE_FMT_DBLP: s->filter = filter_dblp; break;
161
    }
162
163
    return 0;
164
}
165
166
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
167
{
168
    AVFilterContext *ctx = inlink->dst;
169
    AVFilterLink *outlink = ctx->outputs[0];
170
    AudioContrastContext *s = ctx->priv;
171
    AVFrame *out;
172
173
    if (av_frame_is_writable(in)) {
174
        out = in;
175
    } else {
176
        out = ff_get_audio_buffer(outlink, in->nb_samples);
177
        if (!out) {
178
            av_frame_free(&in);
179
            return AVERROR(ENOMEM);
180
        }
181
        av_frame_copy_props(out, in);
182
    }
183
184
    s->filter((void **)out->extended_data, (const void **)in->extended_data,
185
              in->nb_samples, in->channels, s->contrast / 750);
186
187
    if (out != in)
188
        av_frame_free(&in);
189
190
    return ff_filter_frame(outlink, out);
191
}
192
193
static const AVFilterPad inputs[] = {
194
    {
195
        .name         = "default",
196
        .type         = AVMEDIA_TYPE_AUDIO,
197
        .filter_frame = filter_frame,
198
        .config_props = config_input,
199
    },
200
    { NULL }
201
};
202
203
static const AVFilterPad outputs[] = {
204
    {
205
        .name = "default",
206
        .type = AVMEDIA_TYPE_AUDIO,
207
    },
208
    { NULL }
209
};
210
211
AVFilter ff_af_acontrast = {
212
    .name           = "acontrast",
213
    .description    = NULL_IF_CONFIG_SMALL("Simple audio dynamic range compression/expansion filter."),
214
    .query_formats  = query_formats,
215
    .priv_size      = sizeof(AudioContrastContext),
216
    .priv_class     = &acontrast_class,
217
    .inputs         = inputs,
218
    .outputs        = outputs,
219
};