blob: af46e34ff645d10a09c38e5ee43d74d1727e99cc
1 | /* |
2 | * This file is part of FFmpeg. |
3 | * |
4 | * FFmpeg 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 | * FFmpeg 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 FFmpeg; 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_VOLUME_H |
25 | #define AVFILTER_VOLUME_H |
26 | |
27 | #include "libavutil/common.h" |
28 | #include "libavutil/eval.h" |
29 | #include "libavutil/float_dsp.h" |
30 | #include "libavutil/opt.h" |
31 | #include "libavutil/samplefmt.h" |
32 | |
33 | enum PrecisionType { |
34 | PRECISION_FIXED = 0, |
35 | PRECISION_FLOAT, |
36 | PRECISION_DOUBLE, |
37 | }; |
38 | |
39 | enum EvalMode { |
40 | EVAL_MODE_ONCE, |
41 | EVAL_MODE_FRAME, |
42 | EVAL_MODE_NB |
43 | }; |
44 | |
45 | enum VolumeVarName { |
46 | VAR_N, |
47 | VAR_NB_CHANNELS, |
48 | VAR_NB_CONSUMED_SAMPLES, |
49 | VAR_NB_SAMPLES, |
50 | VAR_POS, |
51 | VAR_PTS, |
52 | VAR_SAMPLE_RATE, |
53 | VAR_STARTPTS, |
54 | VAR_STARTT, |
55 | VAR_T, |
56 | VAR_TB, |
57 | VAR_VOLUME, |
58 | VAR_VARS_NB |
59 | }; |
60 | |
61 | enum ReplayGainType { |
62 | REPLAYGAIN_DROP, |
63 | REPLAYGAIN_IGNORE, |
64 | REPLAYGAIN_TRACK, |
65 | REPLAYGAIN_ALBUM, |
66 | }; |
67 | |
68 | typedef struct VolumeContext { |
69 | const AVClass *class; |
70 | AVFloatDSPContext *fdsp; |
71 | int precision; |
72 | int eval_mode; |
73 | const char *volume_expr; |
74 | AVExpr *volume_pexpr; |
75 | double var_values[VAR_VARS_NB]; |
76 | |
77 | int replaygain; |
78 | double replaygain_preamp; |
79 | int replaygain_noclip; |
80 | double volume; |
81 | int volume_i; |
82 | int channels; |
83 | int planes; |
84 | enum AVSampleFormat sample_fmt; |
85 | |
86 | void (*scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples, |
87 | int volume); |
88 | int samples_align; |
89 | } VolumeContext; |
90 | |
91 | void ff_volume_init_x86(VolumeContext *vol); |
92 | |
93 | #endif /* AVFILTER_VOLUME_H */ |
94 |