h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / af_volume.h
1 /*
2 * This file is part of Libav.
3 *
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 /**
20 * @file
21 * audio volume filter
22 */
23
24 #ifndef AVFILTER_AF_VOLUME_H
25 #define AVFILTER_AF_VOLUME_H
26
27 #include "libavutil/common.h"
28 #include "libavutil/float_dsp.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/samplefmt.h"
31
32 enum PrecisionType {
33 PRECISION_FIXED = 0,
34 PRECISION_FLOAT,
35 PRECISION_DOUBLE,
36 };
37
38 enum ReplayGainType {
39 REPLAYGAIN_DROP,
40 REPLAYGAIN_IGNORE,
41 REPLAYGAIN_TRACK,
42 REPLAYGAIN_ALBUM,
43 };
44
45 typedef struct VolumeContext {
46 const AVClass *class;
47 AVFloatDSPContext fdsp;
48 enum PrecisionType precision;
49 enum ReplayGainType replaygain;
50 double replaygain_preamp;
51 int replaygain_noclip;
52 double volume;
53 int volume_i;
54 int channels;
55 int planes;
56 enum AVSampleFormat sample_fmt;
57
58 void (*scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples,
59 int volume);
60 int samples_align;
61 } VolumeContext;
62
63 void ff_volume_init_x86(VolumeContext *vol);
64
65 #endif /* AVFILTER_AF_VOLUME_H */