af_volume.c File Reference

audio volume filter More...

#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/ffmath.h"
#include "libavutil/float_dsp.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/replaygain.h"
#include "audio.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "af_volume.h"

Macros
#define	OFFSET(x)   offsetof(VolumeContext, x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM
#define	F   AV_OPT_FLAG_FILTERING_PARAM
#define	D2TS(d)   (isnan(d) ? AV_NOPTS_VALUE : (int64_t)(d))
#define	TS2D(ts)   ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts))
#define	TS2T(ts, tb)   ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts)*av_q2d(tb))

Functions
	AVFILTER_DEFINE_CLASS (volume)

Variables
AVFilter	ff_af_volume

Detailed Description

audio volume filter

Variable Documentation

ff_af_volume

AVFilter ff_af_volume

Initial value:

= {
    .name           = "volume",
    .description    = NULL_IF_CONFIG_SMALL("Change input volume."),
    .query_formats  = query_formats,
    .priv_size      = sizeof(VolumeContext),
    .priv_class     = &volume_class,
    .init           = init,
    .uninit         = uninit,
    .inputs         = avfilter_af_volume_inputs,
    .outputs        = avfilter_af_volume_outputs,
    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
    .process_command = process_command,
}