avf_avectorscope.c File Reference

audio to video multimedia vectorscope filter More...

#include "libavutil/avassert.h"
#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	AudioVectorScopeContext

Macros
#define	OFFSET(x)   offsetof(AudioVectorScopeContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Enumerations
enum	VectorScopeMode { LISSAJOUS, LISSAJOUS_XY, POLAR, MODE_NB }

Functions
	AVFILTER_DEFINE_CLASS (avectorscope)
static void	draw_dot (AudioVectorScopeContext *s, unsigned x, unsigned y)
static void	fade (AudioVectorScopeContext *s)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	config_output (AVFilterLink *outlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *insamples)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	avectorscope_options []
static const AVFilterPad	audiovectorscope_inputs []
static const AVFilterPad	audiovectorscope_outputs []
AVFilter	ff_avf_avectorscope

Detailed Description

audio to video multimedia vectorscope filter

Definition in file avf_avectorscope.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(AudioVectorScopeContext, x)

Definition at line 55 of file avf_avectorscope.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 56 of file avf_avectorscope.c.

Enumeration Type Documentation

enum VectorScopeMode

Enumerator
LISSAJOUS
LISSAJOUS_XY
POLAR
MODE_NB

Definition at line 36 of file avf_avectorscope.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

avectorscope

)

static void draw_dot ( AudioVectorScopeContext *  s, unsigned  x, unsigned  y  )

static

Definition at line 82 of file avf_avectorscope.c.

Referenced by filter_frame().

static void fade ( AudioVectorScopeContext *  s )

static

Definition at line 102 of file avf_avectorscope.c.

Referenced by filter_frame().

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 121 of file avf_avectorscope.c.

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 151 of file avf_avectorscope.c.

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 165 of file avf_avectorscope.c.

static int filter_frame ( AVFilterLink *  inlink, AVFrame *  insamples  )

static

Definition at line 180 of file avf_avectorscope.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 263 of file avf_avectorscope.c.

Variable Documentation

const AVOption avectorscope_options[]

static

Initial value:

= {
    { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
    { "m",    "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
    { "lissajous",    "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS},    0, 0, FLAGS, "mode" },
    { "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, FLAGS, "mode" },
    { "polar",        "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR},        0, 0, FLAGS, "mode" },
    { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
    { "r",    "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
    { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
    { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
    { "rc", "set red contrast",   OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=40},  0, 255, FLAGS },
    { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=160}, 0, 255, FLAGS },
    { "bc", "set blue contrast",  OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=80},  0, 255, FLAGS },
    { "ac", "set alpha contrast", OFFSET(contrast[3]), AV_OPT_TYPE_INT, {.i64=255}, 0, 255, FLAGS },
    { "rf", "set red fade",       OFFSET(fade[0]), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, FLAGS },
    { "gf", "set green fade",     OFFSET(fade[1]), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, FLAGS },
    { "bf", "set blue fade",      OFFSET(fade[2]), AV_OPT_TYPE_INT, {.i64=5},  0, 255, FLAGS },
    { "af", "set alpha fade",     OFFSET(fade[3]), AV_OPT_TYPE_INT, {.i64=5},  0, 255, FLAGS },
    { "zoom", "set zoom factor",  OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1},  1, 10, FLAGS },
    { NULL }
}

Definition at line 58 of file avf_avectorscope.c.

const AVFilterPad audiovectorscope_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .config_props = config_input,
        .filter_frame = filter_frame,
    },
    { NULL }
}

Definition at line 270 of file avf_avectorscope.c.

const AVFilterPad audiovectorscope_outputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_output,
    },
    { NULL }
}

Definition at line 280 of file avf_avectorscope.c.

AVFilter ff_avf_avectorscope

Initial value:

= {
    .name          = "avectorscope",
    .description   = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."),
    .uninit        = uninit,
    .query_formats = query_formats,
    .priv_size     = sizeof(AudioVectorScopeContext),
    .inputs        = audiovectorscope_inputs,
    .outputs       = audiovectorscope_outputs,
    .priv_class    = &avectorscope_class,
}

Definition at line 289 of file avf_avectorscope.c.