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/*
* 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
*/
/**
* @file
* audio volume filter
*/
#ifndef AVFILTER_AF_VOLUME_H
#define AVFILTER_AF_VOLUME_H
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/float_dsp.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
enum PrecisionType {
PRECISION_FIXED = 0,
PRECISION_FLOAT,
PRECISION_DOUBLE,
};
enum EvalMode {
EVAL_MODE_ONCE,
EVAL_MODE_FRAME,
EVAL_MODE_NB
};
enum VolumeVarName {
VAR_N,
VAR_NB_CHANNELS,
VAR_NB_CONSUMED_SAMPLES,
VAR_NB_SAMPLES,
VAR_POS,
VAR_PTS,
VAR_SAMPLE_RATE,
VAR_STARTPTS,
VAR_STARTT,
VAR_T,
VAR_TB,
VAR_VOLUME,
VAR_VARS_NB
};
enum ReplayGainType {
REPLAYGAIN_DROP,
REPLAYGAIN_IGNORE,
REPLAYGAIN_TRACK,
REPLAYGAIN_ALBUM,
};
typedef struct VolumeContext {
const AVClass *class;
AVFloatDSPContext fdsp;
enum PrecisionType precision;
enum EvalMode eval_mode;
const char *volume_expr;
AVExpr *volume_pexpr;
double var_values[VAR_VARS_NB];
enum ReplayGainType replaygain;
double replaygain_preamp;
double volume;
int volume_i;
int channels;
int planes;
enum AVSampleFormat sample_fmt;
void (*scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples,
int volume);
int samples_align;
} VolumeContext;
void ff_volume_init_x86(VolumeContext *vol);
#endif /* AVFILTER_AF_VOLUME_H */
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