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af_tremolo.c File Reference
#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "audio.h"

Go to the source code of this file.

Data Structures

struct  TremoloContext


#define OFFSET(x)   offsetof(TremoloContext, x)


static int filter_frame (AVFilterLink *inlink, AVFrame *in)
static int query_formats (AVFilterContext *ctx)
static av_cold void uninit (AVFilterContext *ctx)
static int config_input (AVFilterLink *inlink)


static const AVOption tremolo_options []
static const AVFilterPad avfilter_af_tremolo_inputs []
static const AVFilterPad avfilter_af_tremolo_outputs []
AVFilter ff_af_tremolo

Macro Definition Documentation

#define OFFSET (   x)    offsetof(TremoloContext, x)

Definition at line 34 of file af_tremolo.c.

Definition at line 35 of file af_tremolo.c.

Function Documentation

static int filter_frame ( AVFilterLink inlink,
AVFrame in 

Definition at line 45 of file af_tremolo.c.

static int query_formats ( AVFilterContext ctx)

Definition at line 85 of file af_tremolo.c.

static av_cold void uninit ( AVFilterContext ctx)

Definition at line 115 of file af_tremolo.c.

static int config_input ( AVFilterLink inlink)

Definition at line 121 of file af_tremolo.c.

Variable Documentation

const AVOption tremolo_options[]
Initial value:
= {
{ "f", "set frequency in hertz", OFFSET(freq), AV_OPT_TYPE_DOUBLE, {.dbl = 5.0}, 0.1, 20000.0, FLAGS },
{ "d", "set depth as percentage", OFFSET(depth), AV_OPT_TYPE_DOUBLE, {.dbl = 0.5}, 0.0, 1.0, FLAGS },
{ NULL }
#define NULL
Definition: coverity.c:32
#define FLAGS
Definition: af_tremolo.c:35
#define OFFSET(x)
Definition: af_tremolo.c:34
int depth
Definition: v4l.c:62

Definition at line 37 of file af_tremolo.c.

const AVFilterPad avfilter_af_tremolo_inputs[]
Initial value:
= {
.name = "default",
.config_props = config_input,
.filter_frame = filter_frame,
{ NULL }
#define NULL
Definition: coverity.c:32
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: af_tremolo.c:45
static int config_input(AVFilterLink *inlink)
Definition: af_tremolo.c:121

Definition at line 143 of file af_tremolo.c.

const AVFilterPad avfilter_af_tremolo_outputs[]
Initial value:
= {
.name = "default",
{ NULL }
#define NULL
Definition: coverity.c:32

Definition at line 153 of file af_tremolo.c.

AVFilter ff_af_tremolo
Initial value:
= {
.name = "tremolo",
.description = NULL_IF_CONFIG_SMALL("Apply tremolo effect."),
.priv_size = sizeof(TremoloContext),
.priv_class = &tremolo_class,
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_tremolo.c:115
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
static int query_formats(AVFilterContext *ctx)
Definition: af_tremolo.c:85
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
static const AVFilterPad avfilter_af_tremolo_inputs[]
Definition: af_tremolo.c:143
static const AVFilterPad avfilter_af_tremolo_outputs[]
Definition: af_tremolo.c:153

Definition at line 161 of file af_tremolo.c.