f_drawgraph.c File Reference

#include "config_components.h"
#include "libavutil/avstring.h"
#include "libavutil/eval.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	DrawGraphContext

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

Enumerations
enum	{ VAR_MAX, VAR_MIN, VAR_VAL, VAR_VARS_NB }

Functions
	AVFILTER_DEFINE_CLASS_EXT (drawgraph, "(a)drawgraph", drawgraph_options)
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
static void	clear_image (DrawGraphContext *s, AVFrame *out, AVFilterLink *outlink)
static void	draw_dot (int fg, int x, int y, AVFrame *out)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	request_frame (AVFilterLink *outlink)
static int	config_output (AVFilterLink *outlink)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	drawgraph_options []
static const char *const	var_names [] = { "MAX", "MIN", "VAL", NULL }
static const AVFilterPad	drawgraph_outputs []

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(DrawGraphContext, x)

Definition at line 56 of file f_drawgraph.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 57 of file f_drawgraph.c.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
VAR_MAX
VAR_MIN
VAR_VAL
VAR_VARS_NB

Definition at line 91 of file f_drawgraph.c.

Function Documentation

AVFILTER_DEFINE_CLASS_EXT()

AVFILTER_DEFINE_CLASS_EXT	(	drawgraph	,
		"(a)drawgraph"	,
		drawgraph_options
	)

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 93 of file f_drawgraph.c.

query_formats()

static int query_formats ( const AVFilterContext *  ctx, AVFilterFormatsConfig **  cfg_in, AVFilterFormatsConfig **  cfg_out  )

static

Definition at line 130 of file f_drawgraph.c.

clear_image()

static void clear_image ( DrawGraphContext *  s, AVFrame *  out, AVFilterLink *  outlink  )

static

Definition at line 147 of file f_drawgraph.c.

Referenced by filter_frame().

draw_dot()

static void draw_dot ( int  fg, int  x, int  y, AVFrame *  out  )

inlinestatic

Definition at line 157 of file f_drawgraph.c.

Referenced by filter_frame(), and request_frame().

filter_frame()

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

static

Definition at line 162 of file f_drawgraph.c.

request_frame()

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 344 of file f_drawgraph.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 426 of file f_drawgraph.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 441 of file f_drawgraph.c.

Variable Documentation

drawgraph_options

const AVOption drawgraph_options[]

static

Initial value:

= {
    { "m1", "set 1st metadata key", OFFSET(key[0]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
    { "fg1", "set 1st foreground color expression", OFFSET(fg_str[0]), AV_OPT_TYPE_STRING, {.str="0xffff0000"}, 0, 0, FLAGS },
    { "m2", "set 2nd metadata key", OFFSET(key[1]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
    { "fg2", "set 2nd foreground color expression", OFFSET(fg_str[1]), AV_OPT_TYPE_STRING, {.str="0xff00ff00"}, 0, 0, FLAGS },
    { "m3", "set 3rd metadata key", OFFSET(key[2]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
    { "fg3", "set 3rd foreground color expression", OFFSET(fg_str[2]), AV_OPT_TYPE_STRING, {.str="0xffff00ff"}, 0, 0, FLAGS },
    { "m4", "set 4th metadata key", OFFSET(key[3]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
    { "fg4", "set 4th foreground color expression", OFFSET(fg_str[3]), AV_OPT_TYPE_STRING, {.str="0xffffff00"}, 0, 0, FLAGS },
    { "bg", "set background color", OFFSET(bg), AV_OPT_TYPE_COLOR, {.str="white"}, 0, 0, FLAGS },
    { "min", "set minimal value", OFFSET(min), AV_OPT_TYPE_FLOAT, {.dbl=-1.}, INT_MIN, INT_MAX, FLAGS },
    { "max", "set maximal value", OFFSET(max), AV_OPT_TYPE_FLOAT, {.dbl=1.}, INT_MIN, INT_MAX, FLAGS },
    { "mode", "set graph mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, .unit = "mode" },
        {"bar", "draw bars", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "mode"},
        {"dot", "draw dots", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "mode"},
        {"line", "draw lines", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, .unit = "mode"},
    { "slide", "set slide mode", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=0}, 0, 4, FLAGS, .unit = "slide" },
        {"frame", "draw new frames", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "slide"},
        {"replace", "replace old columns with new", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "slide"},
        {"scroll", "scroll from right to left", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, .unit = "slide"},
        {"rscroll", "scroll from left to right", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, .unit = "slide"},
        {"picture", "display graph in single frame", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, FLAGS, .unit = "slide"},
    { "size", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
    { "s", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
    { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
    { "r",    "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
    { NULL }
}

Definition at line 59 of file f_drawgraph.c.

var_names

const char* const var_names[] = { "MAX", "MIN", "VAL", NULL }

static

Definition at line 90 of file f_drawgraph.c.

Referenced by init().

drawgraph_outputs

const AVFilterPad drawgraph_outputs[]

static

Initial value:

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

Definition at line 458 of file f_drawgraph.c.