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avf_showwaves.c File Reference

audio to video multimedia filter More...

#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "formats.h"
#include "audio.h"
#include "video.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct  ShowWavesContext
 

Macros

#define OFFSET(x)   offsetof(ShowWavesContext, x)
 
#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
 
#define MAX_INT16   ((1<<15) -1)
 

Functions

 AVFILTER_DEFINE_CLASS (showwaves)
 
static av_cold int init (AVFilterContext *ctx, const char *args)
 
static av_cold void uninit (AVFilterContext *ctx)
 
static int query_formats (AVFilterContext *ctx)
 
static int config_output (AVFilterLink *outlink)
 
static void push_frame (AVFilterLink *outlink)
 
static int request_frame (AVFilterLink *outlink)
 
static int filter_frame (AVFilterLink *inlink, AVFilterBufferRef *insamples)
 

Variables

static const AVOption showwaves_options []
 
static const AVFilterPad showwaves_inputs []
 
static const AVFilterPad showwaves_outputs []
 
AVFilter avfilter_avf_showwaves
 

Detailed Description

audio to video multimedia filter

Definition in file avf_showwaves.c.

Macro Definition Documentation

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

Definition at line 47 of file avf_showwaves.c.

Definition at line 48 of file avf_showwaves.c.

#define MAX_INT16   ((1<<15) -1)

Definition at line 178 of file avf_showwaves.c.

Referenced by filter_frame().

Function Documentation

AVFILTER_DEFINE_CLASS ( showwaves  )
static av_cold int init ( AVFilterContext ctx,
const char *  args 
)
static

Definition at line 61 of file avf_showwaves.c.

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 76 of file avf_showwaves.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 84 of file avf_showwaves.c.

static int config_output ( AVFilterLink outlink)
static

Definition at line 118 of file avf_showwaves.c.

static void push_frame ( AVFilterLink outlink)
inlinestatic

Definition at line 152 of file avf_showwaves.c.

Referenced by filter_frame(), and request_frame().

static int request_frame ( AVFilterLink outlink)
static

Definition at line 162 of file avf_showwaves.c.

static int filter_frame ( AVFilterLink inlink,
AVFilterBufferRef insamples 
)
static

Definition at line 180 of file avf_showwaves.c.

Variable Documentation

const AVOption showwaves_options[]
static
Initial value:
= {
{ "rate", "set video rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
{ "r", "set video rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
{ "n", "set how many samples to show in the same point", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
{ NULL },
}

Definition at line 50 of file avf_showwaves.c.

const AVFilterPad showwaves_inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = filter_frame,
.min_perms = AV_PERM_READ,
},
{ NULL }
}

Definition at line 229 of file avf_showwaves.c.

const AVFilterPad showwaves_outputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_output,
.request_frame = request_frame,
},
{ NULL }
}

Definition at line 239 of file avf_showwaves.c.

AVFilter avfilter_avf_showwaves
Initial value:
= {
.name = "showwaves",
.description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output."),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.priv_size = sizeof(ShowWavesContext),
.priv_class = &showwaves_class,
}

Definition at line 249 of file avf_showwaves.c.