vf_codecview.c File Reference

Codec debug viewer filter. More...

#include "libavutil/imgutils.h"
#include "libavutil/motion_vector.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	CodecViewContext

Macros
#define	MV_P_FOR   (1<<0)
#define	MV_B_FOR   (1<<1)
#define	MV_B_BACK   (1<<2)
#define	OFFSET(x)   offsetof(CodecViewContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Functions
	AVFILTER_DEFINE_CLASS (codecview)
static int	query_formats (AVFilterContext *ctx)
static int	clip_line (int *sx, int *sy, int *ex, int *ey, int maxx)
static void	draw_line (uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color)
	Draw a line from (ex, ey) -> (sx, sy).
static void	draw_arrow (uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color, int tail, int direction)
	Draw an arrow from (ex, ey) -> (sx, sy).
static int	filter_frame (AVFilterLink *inlink, AVFrame *frame)

Variables
static const AVOption	codecview_options []
static const AVFilterPad	codecview_inputs []
static const AVFilterPad	codecview_outputs []
AVFilter	ff_vf_codecview

Detailed Description

Codec debug viewer filter.

All the MV drawing code from Michael Niedermayer is extracted from libavcodec/mpegvideo.c.

TODO: segmentation TODO: quantization

Definition in file vf_codecview.c.

Macro Definition Documentation

#define MV_P_FOR   (1<<0)

Definition at line 39 of file vf_codecview.c.

Referenced by filter_frame().

#define MV_B_FOR   (1<<1)

Definition at line 40 of file vf_codecview.c.

Referenced by filter_frame().

#define MV_B_BACK   (1<<2)

Definition at line 41 of file vf_codecview.c.

Referenced by filter_frame().

#define OFFSET

(

x

)

offsetof(CodecViewContext, x)

Definition at line 48 of file vf_codecview.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 49 of file vf_codecview.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

codecview

)

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 60 of file vf_codecview.c.

static int clip_line ( int *  sx, int *  sy, int *  ex, int *  ey, int  maxx  )

static

Definition at line 69 of file vf_codecview.c.

Referenced by draw_line().

static void draw_line ( uint8_t *  buf, int  sx, int  sy, int  ex, int  ey, int  w, int  h, int  stride, int  color  )

static

Draw a line from (ex, ey) -> (sx, sy).

Parameters

w	width of the image
h	height of the image
stride	stride/linesize of the image
color	color of the arrow

Definition at line 97 of file vf_codecview.c.

Referenced by draw_arrow().

static void draw_arrow ( uint8_t *  buf, int  sx, int  sy, int  ex, int  ey, int  w, int  h, int  stride, int  color, int  tail, int  direction  )

static

Draw an arrow from (ex, ey) -> (sx, sy).

Parameters

w	width of the image
h	height of the image
stride	stride/linesize of the image
color	color of the arrow

Definition at line 155 of file vf_codecview.c.

Referenced by filter_frame().

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

static

Definition at line 193 of file vf_codecview.c.

Variable Documentation

const AVOption codecview_options[]

static

Initial value:

= {
    { "mv", "set motion vectors to visualize", OFFSET(mv), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv" },
        {"pf", "forward predicted MVs of P-frames",  0, AV_OPT_TYPE_CONST, {.i64 = MV_P_FOR },  INT_MIN, INT_MAX, FLAGS, "mv"},
        {"bf", "forward predicted MVs of B-frames",  0, AV_OPT_TYPE_CONST, {.i64 = MV_B_FOR },  INT_MIN, INT_MAX, FLAGS, "mv"},
        {"bb", "backward predicted MVs of B-frames", 0, AV_OPT_TYPE_CONST, {.i64 = MV_B_BACK }, INT_MIN, INT_MAX, FLAGS, "mv"},
    { NULL }
}

Definition at line 50 of file vf_codecview.c.

const AVFilterPad codecview_inputs[]

static

Initial value:

= {
    {
        .name           = "default",
        .type           = AVMEDIA_TYPE_VIDEO,
        .filter_frame   = filter_frame,
        .needs_writable = 1,
     },
     { NULL }
}

Definition at line 217 of file vf_codecview.c.

const AVFilterPad codecview_outputs[]

static

Initial value:

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

Definition at line 227 of file vf_codecview.c.

AVFilter ff_vf_codecview

Initial value:

= {
    .name          = "codecview",
    .description   = NULL_IF_CONFIG_SMALL("Visualize information about some codecs"),
    .priv_size     = sizeof(CodecViewContext),
    .query_formats = query_formats,
    .inputs        = codecview_inputs,
    .outputs       = codecview_outputs,
    .priv_class    = &codecview_class,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}

Definition at line 235 of file vf_codecview.c.