/* * 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_VOLUME_H#define AVFILTER_VOLUME_H #include <stdint.h>#include "libavutil/eval.h"#include "libavutil/float_dsp.h"#include "libavutil/log.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,#if FF_API_FRAME_PKT    VAR_POS,#endif    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;    int precision;    int eval_mode;    const char *volume_expr;    AVExpr *volume_pexpr;    double var_values[VAR_VARS_NB];     int replaygain;    double replaygain_preamp;    int    replaygain_noclip;    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_VOLUME_H */