Fieldmatching filter, ported from VFM filter (VapouSsynth) 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"

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.

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	avfilter_vf_fieldmatch

Detailed Description

Fieldmatching filter, ported from VFM filter (VapouSsynth) 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

#define INPUT_MAIN 0

Definition at line 42 of file vf_fieldmatch.c.

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

#define INPUT_CLEANSRC 1

Definition at line 43 of file vf_fieldmatch.c.

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

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

Definition at line 112 of file vf_fieldmatch.c.

#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 113 of file vf_fieldmatch.c.

#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

#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().

#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().

#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().

#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().

#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

enum fieldmatch_parity

Enumerator:

FM_PARITY_AUTO
FM_PARITY_BOTTOM
FM_PARITY_TOP

Definition at line 45 of file vf_fieldmatch.c.

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.

enum comb_matching_mode

Enumerator:

COMBMATCH_NONE
COMBMATCH_SC
COMBMATCH_FULL
NB_COMBMATCH

Definition at line 61 of file vf_fieldmatch.c.

enum comb_dbg

Enumerator:

COMBDBG_NONE
COMBDBG_PCN
COMBDBG_PCNUB
NB_COMBDBG

Definition at line 68 of file vf_fieldmatch.c.

anonymous enum

Enumerator:

mP
mC
mN
mB
mU

Definition at line 471 of file vf_fieldmatch.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( fieldmatch )

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().

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().

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().

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(), and compare_fields().

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().

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().

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().

static int get_field_base	(	int	match,
		int	field
	)

static

Definition at line 473 of file vf_fieldmatch.c.

Referenced by compare_fields().

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

static

Definition at line 478 of file vf_fieldmatch.c.

Referenced by 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().

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().

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

static

Definition at line 617 of file vf_fieldmatch.c.

Referenced by filter_frame().

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

static

Definition at line 644 of file vf_fieldmatch.c.

Referenced by filter_frame().

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

static

Definition at line 671 of file vf_fieldmatch.c.

Referenced by fieldmatch_init(), and request_inlink().

static int request_inlink	(	AVFilterContext *	ctx,
		int	lid
	)

static

Definition at line 818 of file vf_fieldmatch.c.

Referenced by request_frame().

static int request_frame ( AVFilterLink * outlink )

static

Definition at line 834 of file vf_fieldmatch.c.

static int query_formats ( AVFilterContext * ctx )

static

Definition at line 850 of file vf_fieldmatch.c.

static int config_input ( AVFilterLink * inlink )

static

Definition at line 862 of file vf_fieldmatch.c.

Referenced by fieldmatch_init().

static av_cold int fieldmatch_init ( AVFilterContext * ctx )

static

Definition at line 893 of file vf_fieldmatch.c.

static av_cold void fieldmatch_uninit ( AVFilterContext * ctx )

static

Definition at line 929 of file vf_fieldmatch.c.

static int config_output ( AVFilterLink * outlink )

static

Definition at line 947 of file vf_fieldmatch.c.

Variable Documentation

const AVOption fieldmatch_options[]

static

Definition at line 115 of file vf_fieldmatch.c.

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

static

Definition at line 668 of file vf_fieldmatch.c.

Referenced by filter_frame().

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

static

Definition at line 669 of file vf_fieldmatch.c.

Referenced by filter_frame().

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 963 of file vf_fieldmatch.c.

AVFilter avfilter_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 973 of file vf_fieldmatch.c.

Data Structures

Macros

Enumerations

Functions

Variables

Detailed Description

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation