vf_fieldmatch.c File Reference

Fieldmatching filter, ported from VFM filter (VapourSynth) by Clément. More...

#include <inttypes.h>
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/timestamp.h"
#include "avfilter.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	FieldMatchContext

Macros
#define	INPUT_MAIN   0
#define	INPUT_CLEANSRC   1
#define	OFFSET(x)   offsetof(FieldMatchContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	FILTER(xm2, xm1, xp1, xp2)
#define	HAS_FF_AROUND(p, lz)
#define	C_ARRAY_ADD(v)
#define	VERTICAL_HALF(y_start, y_end)
#define	LOAD_COMB(mid)
#define	SLIDING_FRAME_WINDOW(prv, src, nxt)

Enumerations
enum	fieldmatch_parity { FM_PARITY_AUTO = -1, FM_PARITY_BOTTOM = 0, FM_PARITY_TOP = 1 }
enum	matching_mode {   MODE_PC, MODE_PC_N, MODE_PC_U, MODE_PC_N_UB,   MODE_PCN, MODE_PCN_UB, NB_MODE }
enum	comb_matching_mode { COMBMATCH_NONE, COMBMATCH_SC, COMBMATCH_FULL, NB_COMBMATCH }
enum	comb_dbg { COMBDBG_NONE, COMBDBG_PCN, COMBDBG_PCNUB, NB_COMBDBG }
enum	{   mP, mC, mN, mB,   mU }

Functions
	AVFILTER_DEFINE_CLASS (fieldmatch)
static int	get_width (const FieldMatchContext *fm, const AVFrame *f, int plane)
static int	get_height (const FieldMatchContext *fm, const AVFrame *f, int plane)
static int64_t	luma_abs_diff (const AVFrame *f1, const AVFrame *f2)
static void	fill_buf (uint8_t *data, int w, int h, int linesize, uint8_t v)
static int	calc_combed_score (const FieldMatchContext *fm, const AVFrame *src)
static void	build_abs_diff_mask (const uint8_t *prvp, int prv_linesize, const uint8_t *nxtp, int nxt_linesize, uint8_t *tbuffer, int tbuf_linesize, int width, int height)
static void	build_diff_map (FieldMatchContext *fm, const uint8_t *prvp, int prv_linesize, const uint8_t *nxtp, int nxt_linesize, uint8_t *dstp, int dst_linesize, int height, int width, int plane)
	Build a map over which pixels differ a lot/a little. More...
static int	get_field_base (int match, int field)
static AVFrame *	select_frame (FieldMatchContext *fm, int match)
static int	compare_fields (FieldMatchContext *fm, int match1, int match2, int field)
static void	copy_fields (const FieldMatchContext *fm, AVFrame *dst, const AVFrame *src, int field)
static AVFrame *	create_weave_frame (AVFilterContext *ctx, int match, int field, const AVFrame *prv, AVFrame *src, const AVFrame *nxt)
static int	checkmm (AVFilterContext *ctx, int *combs, int m1, int m2, AVFrame **gen_frames, int field)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	request_inlink (AVFilterContext *ctx, int lid)
static int	request_frame (AVFilterLink *outlink)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static av_cold int	fieldmatch_init (AVFilterContext *ctx)
static av_cold void	fieldmatch_uninit (AVFilterContext *ctx)
static int	config_output (AVFilterLink *outlink)

Variables
static const AVOption	fieldmatch_options []
static const int	fxo0m [] = { mP, mC, mN, mB, mU }
static const int	fxo1m [] = { mN, mC, mP, mU, mB }
static const AVFilterPad	fieldmatch_outputs []
AVFilter	ff_vf_fieldmatch

Detailed Description

Fieldmatching filter, ported from VFM filter (VapourSynth) by Clément.

Fredrik Mellbin is the author of the VIVTC/VFM filter, which is itself a light clone of the TIVTC/TFM (AviSynth) filter written by Kevin Stone (tritical), the original author.

See also

http://bengal.missouri.edu/~kes25c/

http://www.vapoursynth.com/about/

Definition in file vf_fieldmatch.c.

Macro Definition Documentation

INPUT_MAIN

#define INPUT_MAIN   0

Definition at line 42 of file vf_fieldmatch.c.

Referenced by config_output(), fieldmatch_init(), filter_frame(), and request_frame().

INPUT_CLEANSRC

#define INPUT_CLEANSRC   1

Definition at line 43 of file vf_fieldmatch.c.

Referenced by config_output(), fieldmatch_init(), filter_frame(), and request_frame().

OFFSET

#define OFFSET

(

x

)

offsetof(FieldMatchContext, x)

Definition at line 112 of file vf_fieldmatch.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 113 of file vf_fieldmatch.c.

FILTER

#define FILTER	(		xm2,
			xm1,
			xp1,
			xp2
	)

Value:

abs(  4 * srcp[x] \
             -3 * (srcp[x + (xm1)*src_linesize] + srcp[x + (xp1)*src_linesize]) \
             +    (srcp[x + (xm2)*src_linesize] + srcp[x + (xp2)*src_linesize])) > cthresh6

Referenced by calc_combed_score().

HAS_FF_AROUND

#define HAS_FF_AROUND	(		p,
			lz
	)

Value:

(p[(x)-1 - (lz)] == 0xff || p[(x) - (lz)] == 0xff || p[(x)+1 - (lz)] == 0xff || \
                              p[(x)-1       ] == 0xff ||                          p[(x)+1       ] == 0xff || \
                              p[(x)-1 + (lz)] == 0xff || p[(x) + (lz)] == 0xff || p[(x)+1 + (lz)] == 0xff)

Referenced by calc_combed_score().

C_ARRAY_ADD

#define C_ARRAY_ADD

(

v

)

Value:

do {                         \
    const int box1 = (x / blockx) * 4;              \
    const int box2 = ((x + xhalf) / blockx) * 4;    \
    c_array[temp1 + box1    ] += v;                 \
    c_array[temp1 + box2 + 1] += v;                 \
    c_array[temp2 + box1 + 2] += v;                 \
    c_array[temp2 + box2 + 3] += v;                 \
} while (0)

Referenced by calc_combed_score().

VERTICAL_HALF

#define VERTICAL_HALF	(		y_start,
			y_end
	)

Value:

do {                                  \
    for (y = y_start; y < y_end; y++) {                                     \
        const int temp1 = (y / blocky) * xblocks4;                          \
        const int temp2 = ((y + yhalf) / blocky) * xblocks4;                \
        for (x = 0; x < width; x++)                                         \
            if (cmkp[x - cmk_linesize] == 0xff &&                           \
                cmkp[x               ] == 0xff &&                           \
                cmkp[x + cmk_linesize] == 0xff)                             \
                C_ARRAY_ADD(1);                                             \
        cmkp += cmk_linesize;                                               \
    }                                                                       \
} while (0)

Referenced by calc_combed_score().

LOAD_COMB

#define LOAD_COMB

(

mid

)

Value:

do {                                                     \
    if (combs[mid] < 0) {                                                       \
        if (!gen_frames[mid])                                                   \
            gen_frames[mid] = create_weave_frame(ctx, mid, field,               \
                                                 fm->prv, fm->src, fm->nxt);    \
        combs[mid] = calc_combed_score(fm, gen_frames[mid]);                    \
    }                                                                           \
} while (0)

Referenced by checkmm().

SLIDING_FRAME_WINDOW

#define SLIDING_FRAME_WINDOW	(		prv,
			src,
			nxt
	)

Value:

do {                \
        if (prv != src) /* 2nd loop exception (1st has prv==src and we don't want to loose src) */ \
            av_frame_free(&prv);                                \
        prv = src;                                              \
        src = nxt;                                              \
        if (in)                                                 \
            nxt = in;                                           \
        if (!prv)                                               \
            prv = src;                                          \
        if (!prv) /* received only one frame at that point */   \
            return 0;                                           \
        av_assert0(prv && src && nxt);                          \
} while (0)

Referenced by filter_frame().

Enumeration Type Documentation

fieldmatch_parity

enum fieldmatch_parity

Enumerator
FM_PARITY_AUTO
FM_PARITY_BOTTOM
FM_PARITY_TOP

Definition at line 45 of file vf_fieldmatch.c.

matching_mode

enum matching_mode

Enumerator
MODE_PC
MODE_PC_N
MODE_PC_U
MODE_PC_N_UB
MODE_PCN
MODE_PCN_UB
NB_MODE

Definition at line 51 of file vf_fieldmatch.c.

comb_matching_mode

enum comb_matching_mode

Enumerator
COMBMATCH_NONE
COMBMATCH_SC
COMBMATCH_FULL
NB_COMBMATCH

Definition at line 61 of file vf_fieldmatch.c.

comb_dbg

enum comb_dbg

Enumerator
COMBDBG_NONE
COMBDBG_PCN
COMBDBG_PCNUB
NB_COMBDBG

Definition at line 68 of file vf_fieldmatch.c.

anonymous enum

anonymous enum

Enumerator
mP
mC
mN
mB
mU

Definition at line 471 of file vf_fieldmatch.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

fieldmatch

)

get_width()

static int get_width ( const FieldMatchContext *  fm, const AVFrame *  f, int  plane  )

static

Definition at line 154 of file vf_fieldmatch.c.

Referenced by calc_combed_score(), compare_fields(), and copy_fields().

get_height()

static int get_height ( const FieldMatchContext *  fm, const AVFrame *  f, int  plane  )

static

Definition at line 159 of file vf_fieldmatch.c.

Referenced by calc_combed_score(), compare_fields(), and copy_fields().

luma_abs_diff()

static int64_t luma_abs_diff ( const AVFrame *  f1, const AVFrame *  f2  )

static

Definition at line 164 of file vf_fieldmatch.c.

Referenced by filter_frame().

fill_buf()

static void fill_buf ( uint8_t *  data, int  w, int  h, int  linesize, uint8_t  v  )

static

Definition at line 184 of file vf_fieldmatch.c.

Referenced by calc_combed_score(), compare_fields(), and intercept_id3().

calc_combed_score()

static int calc_combed_score ( const FieldMatchContext *  fm, const AVFrame *  src  )

static

Definition at line 194 of file vf_fieldmatch.c.

Referenced by filter_frame().

build_abs_diff_mask()

static void build_abs_diff_mask ( const uint8_t *  prvp, int  prv_linesize, const uint8_t *  nxtp, int  nxt_linesize, uint8_t *  tbuffer, int  tbuf_linesize, int  width, int  height  )

static

Definition at line 392 of file vf_fieldmatch.c.

Referenced by build_diff_map().

build_diff_map()

static void build_diff_map ( FieldMatchContext *  fm, const uint8_t *  prvp, int  prv_linesize, const uint8_t *  nxtp, int  nxt_linesize, uint8_t *  dstp, int  dst_linesize, int  height, int  width, int  plane  )

static

Build a map over which pixels differ a lot/a little.

Definition at line 413 of file vf_fieldmatch.c.

Referenced by compare_fields().

get_field_base()

static int get_field_base ( int  match, int  field  )

static

Definition at line 473 of file vf_fieldmatch.c.

Referenced by compare_fields().

select_frame()

static AVFrame* select_frame ( FieldMatchContext *  fm, int  match  )

static

Definition at line 478 of file vf_fieldmatch.c.

Referenced by compare_fields().

compare_fields()

static int compare_fields ( FieldMatchContext *  fm, int  match1, int  match2, int  field  )

static

Definition at line 485 of file vf_fieldmatch.c.

Referenced by filter_frame().

copy_fields()

static void copy_fields ( const FieldMatchContext *  fm, AVFrame *  dst, const AVFrame *  src, int  field  )

static

Definition at line 607 of file vf_fieldmatch.c.

Referenced by create_weave_frame().

create_weave_frame()

static AVFrame* create_weave_frame ( AVFilterContext *  ctx, int  match, int  field, const AVFrame *  prv, AVFrame *  src, const AVFrame *  nxt  )

static

Definition at line 620 of file vf_fieldmatch.c.

Referenced by filter_frame().

checkmm()

static int checkmm ( AVFilterContext *  ctx, int *  combs, int  m1, int  m2, AVFrame **  gen_frames, int  field  )

static

Definition at line 647 of file vf_fieldmatch.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 674 of file vf_fieldmatch.c.

Referenced by fieldmatch_init(), and request_inlink().

request_inlink()

static int request_inlink ( AVFilterContext *  ctx, int  lid  )

static

Definition at line 821 of file vf_fieldmatch.c.

Referenced by request_frame().

request_frame()

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 837 of file vf_fieldmatch.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 853 of file vf_fieldmatch.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 867 of file vf_fieldmatch.c.

Referenced by fieldmatch_init().

fieldmatch_init()

static av_cold int fieldmatch_init ( AVFilterContext *  ctx )

static

Definition at line 898 of file vf_fieldmatch.c.

fieldmatch_uninit()

static av_cold void fieldmatch_uninit ( AVFilterContext *  ctx )

static

Definition at line 941 of file vf_fieldmatch.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 959 of file vf_fieldmatch.c.

Variable Documentation

fieldmatch_options

const AVOption fieldmatch_options[]

static

Definition at line 115 of file vf_fieldmatch.c.

fxo0m

const int fxo0m[] = { mP, mC, mN, mB, mU }

static

Definition at line 671 of file vf_fieldmatch.c.

Referenced by filter_frame().

fxo1m

const int fxo1m[] = { mN, mC, mP, mU, mB }

static

Definition at line 672 of file vf_fieldmatch.c.

Referenced by filter_frame().

fieldmatch_outputs

const AVFilterPad fieldmatch_outputs[]

static

Initial value:

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

Definition at line 974 of file vf_fieldmatch.c.

ff_vf_fieldmatch

AVFilter ff_vf_fieldmatch

Initial value:

= {
    .name           = "fieldmatch",
    .description    = NULL_IF_CONFIG_SMALL("Field matching for inverse telecine."),
    .query_formats  = query_formats,
    .priv_size      = sizeof(FieldMatchContext),
    .init           = fieldmatch_init,
    .uninit         = fieldmatch_uninit,
    .inputs         = NULL,
    .outputs        = fieldmatch_outputs,
    .priv_class     = &fieldmatch_class,
    .flags          = AVFILTER_FLAG_DYNAMIC_INPUTS,
}

Definition at line 984 of file vf_fieldmatch.c.