FFmpeg
Data Structures | Macros | Functions | Variables
af_stereowiden.c File Reference
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "formats.h"

Go to the source code of this file.

Data Structures

struct  StereoWidenContext
 

Macros

#define OFFSET(x)   offsetof(StereoWidenContext, x)
 
#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 
#define AT   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
 

Functions

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

Variables

static const AVOption stereowiden_options []
 
static const AVFilterPad inputs []
 
static const AVFilterPad outputs []
 
const AVFilter ff_af_stereowiden
 

Macro Definition Documentation

◆ OFFSET

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

Definition at line 41 of file af_stereowiden.c.

◆ A

Definition at line 42 of file af_stereowiden.c.

◆ AT

Definition at line 43 of file af_stereowiden.c.

Function Documentation

◆ AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS ( stereowiden  )

◆ query_formats()

static int query_formats ( AVFilterContext ctx)
static

Definition at line 55 of file af_stereowiden.c.

◆ config_input()

static int config_input ( AVFilterLink inlink)
static

Definition at line 71 of file af_stereowiden.c.

◆ filter_frame()

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 86 of file af_stereowiden.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 134 of file af_stereowiden.c.

Variable Documentation

◆ stereowiden_options

const AVOption stereowiden_options[]
static
Initial value:
= {
{ "delay", "set delay time", OFFSET(delay), AV_OPT_TYPE_FLOAT, {.dbl=20}, 1, 100, A },
{ "feedback", "set feedback gain", OFFSET(feedback), AV_OPT_TYPE_FLOAT, {.dbl=.3}, 0, 0.9, AT },
{ "crossfeed", "set cross feed", OFFSET(crossfeed), AV_OPT_TYPE_FLOAT, {.dbl=.3}, 0, 0.8, AT },
{ "drymix", "set dry-mix", OFFSET(drymix), AV_OPT_TYPE_FLOAT, {.dbl=.8}, 0, 1.0, AT },
{ NULL }
}

Definition at line 45 of file af_stereowiden.c.

◆ inputs

const AVFilterPad inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = filter_frame,
.config_props = config_input,
},
{ NULL }
}

Definition at line 141 of file af_stereowiden.c.

◆ outputs

const AVFilterPad outputs[]
static
Initial value:
= {
{
.name = "default",
},
{ NULL }
}

Definition at line 151 of file af_stereowiden.c.

◆ ff_af_stereowiden

const AVFilter ff_af_stereowiden
Initial value:
= {
.name = "stereowiden",
.description = NULL_IF_CONFIG_SMALL("Apply stereo widening effect."),
.query_formats = query_formats,
.priv_size = sizeof(StereoWidenContext),
.priv_class = &stereowiden_class,
}

Definition at line 159 of file af_stereowiden.c.

uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_stereowiden.c:134
A
#define A
Definition: af_stereowiden.c:42
inputs
static const AVFilterPad inputs[]
Definition: af_stereowiden.c:141
StereoWidenContext
Definition: af_stereowiden.c:28
outputs
static const AVFilterPad outputs[]
Definition: af_stereowiden.c:151
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: af_stereowiden.c:86
NULL
#define NULL
Definition: coverity.c:32
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: af_acrusher.c:336
ff_filter_process_command
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
Definition: avfilter.c:842
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
AT
#define AT
Definition: af_stereowiden.c:43
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_stereowiden.c:55
OFFSET
#define OFFSET(x)
Definition: af_stereowiden.c:41
AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:134
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
config_input
static int config_input(AVFilterLink *inlink)
Definition: af_stereowiden.c:71