yading@10: /*
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * audio volume filter
yading@10:  */
yading@10: 
yading@10: #ifndef AVFILTER_AF_VOLUME_H
yading@10: #define AVFILTER_AF_VOLUME_H
yading@10: 
yading@10: #include "libavutil/common.h"
yading@10: #include "libavutil/float_dsp.h"
yading@10: #include "libavutil/opt.h"
yading@10: #include "libavutil/samplefmt.h"
yading@10: 
yading@10: enum PrecisionType {
yading@10:     PRECISION_FIXED = 0,
yading@10:     PRECISION_FLOAT,
yading@10:     PRECISION_DOUBLE,
yading@10: };
yading@10: 
yading@10: typedef struct VolumeContext {
yading@10:     const AVClass *class;
yading@10:     AVFloatDSPContext fdsp;
yading@10:     enum PrecisionType precision;
yading@10:     double volume;
yading@10:     int    volume_i;
yading@10:     int    channels;
yading@10:     int    planes;
yading@10:     enum AVSampleFormat sample_fmt;
yading@10: 
yading@10:     void (*scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples,
yading@10:                           int volume);
yading@10:     int samples_align;
yading@10: } VolumeContext;
yading@10: 
yading@10: void ff_volume_init_x86(VolumeContext *vol);
yading@10: 
yading@10: #endif /* AVFILTER_AF_VOLUME_H */