#include "libavutil/imgutils.h"
#include "libavutil/intfloat.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixfmt.h"
#include "avfilter.h"
#include "formats.h"
#include "framesync.h"
#include "internal.h"
#include "video.h"
#include "blend.h"

Data Structures
struct	BlendContext

struct	ThreadData
	Used for passing data between threads. More...

Macros
#define	TOP 0

#define	BOTTOM 1

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

#define	FLAGS AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_VIDEO_PARAM\|AV_OPT_FLAG_RUNTIME_PARAM

#define	COPY(src, depth)

#define	DEFINE_BLEND8(name, expr)

#define	DEFINE_BLEND16(name, expr, depth)

#define	DEFINE_BLEND32(name, expr, depth)

#define	A top[j]

#define	B bottom[j]

#define	MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 255))

#define	SCREEN(x, a, b) (255 - (x) * ((255 - (a)) * (255 - (b)) / 255))

#define	BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 255 - ((255 - (b)) << 8) / (a)))

#define	DODGE(a, b) (((a) == 255) ? (a) : FFMIN(255, (((b) << 8) / (255 - (a)))))

#define	MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 65535))

#define	SCREEN(x, a, b) (65535 - (x) * ((65535 - (a)) * (65535 - (b)) / 65535))

#define	BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 65535 - ((65535 - (b)) << 16) / (a)))

#define	DODGE(a, b) (((a) == 65535) ? (a) : FFMIN(65535, (((b) << 16) / (65535 - (a)))))

#define	MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 1023))

#define	SCREEN(x, a, b) (1023 - (x) * ((1023 - (a)) * (1023 - (b)) / 1023))

#define	BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 1023 - ((1023 - (b)) << 10) / (a)))

#define	DODGE(a, b) (((a) == 1023) ? (a) : FFMIN(1023, (((b) << 10) / (1023 - (a)))))

#define	MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 4095))

#define	SCREEN(x, a, b) (4095 - (x) * ((4095 - (a)) * (4095 - (b)) / 4095))

#define	BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 4095 - ((4095 - (b)) << 12) / (a)))

#define	DODGE(a, b) (((a) == 4095) ? (a) : FFMIN(4095, (((b) << 12) / (4095 - (a)))))

#define	MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 511))

#define	SCREEN(x, a, b) (511 - (x) * ((511 - (a)) * (511 - (b)) / 511))

#define	BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 511 - ((511 - (b)) << 9) / (a)))

#define	DODGE(a, b) (((a) == 511) ? (a) : FFMIN(511, (((b) << 9) / (511 - (a)))))

#define	MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 1.0))

#define	SCREEN(x, a, b) (1.0 - (x) * ((1.0 - (a)) * (1.0 - (b)) / 1.0))

#define	BURN(a, b) (((a) <= 0.0) ? (a) : FFMAX(0.0, 1.0 - (1.0 - (b)) / (a)))

#define	DODGE(a, b) (((a) >= 1.0) ? (a) : FFMIN(1.0, ((b) / (1.0 - (a)))))

#define	DEFINE_BLEND_EXPR(type, name, div)

#define	DEFINE_INIT_BLEND_FUNC(depth, nbits)

Enumerations
enum	{ VAR_X, VAR_Y, VAR_W, VAR_H, VAR_SW, VAR_SH, VAR_T, VAR_N, VAR_A, VAR_B, VAR_TOP, VAR_BOTTOM, VAR_VARS_NB }

Functions
	FRAMESYNC_DEFINE_CLASS (blend, BlendContext, fs)

static void	blend_normal_8bit (const uint8_t top, ptrdiff_t top_linesize, const uint8_t bottom, ptrdiff_t bottom_linesize, uint8_t dst, ptrdiff_t dst_linesize, ptrdiff_t width, ptrdiff_t height, FilterParams param, double *values, int starty)

static void	blend_normal_16bit (const uint8_t _top, ptrdiff_t top_linesize, const uint8_t _bottom, ptrdiff_t bottom_linesize, uint8_t _dst, ptrdiff_t dst_linesize, ptrdiff_t width, ptrdiff_t height, FilterParams param, double *values, int starty)

static void	blend_normal_32bit (const uint8_t _top, ptrdiff_t top_linesize, const uint8_t _bottom, ptrdiff_t bottom_linesize, uint8_t _dst, ptrdiff_t dst_linesize, ptrdiff_t width, ptrdiff_t height, FilterParams param, double *values, int starty)

	DEFINE_BLEND8 (multiply128, av_clip_uint8((A - 128) *B/32.+128))

static AVFrame *	blend_frame (AVFilterContext ctx, AVFrame top_buf, const AVFrame *bottom_buf)

static int	blend_frame_for_dualinput (FFFrameSync *fs)

static av_cold int	init (AVFilterContext *ctx)

static int	query_formats (AVFilterContext *ctx)

static av_cold void	uninit (AVFilterContext *ctx)

void	ff_blend_init (FilterParams *param, int depth)

static int	config_params (AVFilterContext *ctx)

static int	config_output (AVFilterLink *outlink)

static int	process_command (AVFilterContext ctx, const char cmd, const char args, char res, int res_len, int flags)

Variables
static const char *const	var_names [] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL }

static const AVOption	blend_options []

Macro Definition Documentation

◆ TOP

#define TOP 0

Definition at line 33 of file vf_blend.c.

◆ BOTTOM

#define BOTTOM 1

Definition at line 34 of file vf_blend.c.

◆ OFFSET

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

Definition at line 63 of file vf_blend.c.

◆ FLAGS

#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 64 of file vf_blend.c.

◆ COPY

#define COPY	(	src,
		depth
	)

Value:

static void blend_copy ## src##_##depth(const uint8_t *top, ptrdiff_t top_linesize,    \
                            const uint8_t *bottom, ptrdiff_t bottom_linesize,\
                            uint8_t *dst, ptrdiff_t dst_linesize,            \
                            ptrdiff_t width, ptrdiff_t height,               \
                            FilterParams *param, double *values, int starty) \
{                                                                            \
    av_image_copy_plane(dst, dst_linesize, src, src ## _linesize,            \
                        width * depth / 8, height);                          \
}

Definition at line 122 of file vf_blend.c.

◆ DEFINE_BLEND8

#define DEFINE_BLEND8	(	name,
		expr
	)

Value:

static void blend_## name##_8bit(const uint8_t *top, ptrdiff_t top_linesize,         \
                                 const uint8_t *bottom, ptrdiff_t bottom_linesize,   \
                                 uint8_t *dst, ptrdiff_t dst_linesize,               \
                                 ptrdiff_t width, ptrdiff_t height,                \
                                 FilterParams *param, double *values, int starty) \
{                                                                              \
    double opacity = param->opacity;                                           \
    int i, j;                                                                  \
                                                                               \
    for (i = 0; i < height; i++) {                                             \
        for (j = 0; j < width; j++) {                                          \
            dst[j] = top[j] + ((expr) - top[j]) * opacity;                     \
        }                                                                      \
        dst    += dst_linesize;                                                \
        top    += top_linesize;                                                \
        bottom += bottom_linesize;                                             \
    }                                                                          \
}

Definition at line 213 of file vf_blend.c.

◆ DEFINE_BLEND16

#define DEFINE_BLEND16	(	name,
		expr,
		depth
	)

Value:

static void blend_## name##_##depth##bit(const uint8_t *_top, ptrdiff_t top_linesize,\
                                  const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
                                  uint8_t *_dst, ptrdiff_t dst_linesize,             \
                                  ptrdiff_t width, ptrdiff_t height,           \
                                  FilterParams *param, double *values, int starty)         \
{                                                                              \
    const uint16_t *top = (const uint16_t*)_top;                               \
    const uint16_t *bottom = (const uint16_t*)_bottom;                         \
    uint16_t *dst = (uint16_t*)_dst;                                           \
    double opacity = param->opacity;                                           \
    int i, j;                                                                  \
    dst_linesize /= 2;                                                         \
    top_linesize /= 2;                                                         \
    bottom_linesize /= 2;                                                      \
                                                                               \
    for (i = 0; i < height; i++) {                                             \
        for (j = 0; j < width; j++) {                                          \
            dst[j] = top[j] + ((expr) - top[j]) * opacity;                     \
        }                                                                      \
        dst    += dst_linesize;                                                \
        top    += top_linesize;                                                \
        bottom += bottom_linesize;                                             \
    }                                                                          \
}

Definition at line 233 of file vf_blend.c.

◆ DEFINE_BLEND32

#define DEFINE_BLEND32	(	name,
		expr,
		depth
	)

Value:

static void blend_## name##_##depth##bit(const uint8_t *_top, ptrdiff_t top_linesize,\
                                  const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
                                  uint8_t *_dst, ptrdiff_t dst_linesize,             \
                                  ptrdiff_t width, ptrdiff_t height,                 \
                                  FilterParams *param, double *values, int starty)   \
{                                                                              \
    const float *top = (const float*)_top;                                     \
    const float *bottom = (const float*)_bottom;                               \
    float *dst = (float*)_dst;                                                 \
    double opacity = param->opacity;                                           \
    int i, j;                                                                  \
    dst_linesize /= 4;                                                         \
    top_linesize /= 4;                                                         \
    bottom_linesize /= 4;                                                      \
                                                                               \
    for (i = 0; i < height; i++) {                                             \
        for (j = 0; j < width; j++) {                                          \
            dst[j] = top[j] + ((expr) - top[j]) * opacity;                     \
        }                                                                      \
        dst    += dst_linesize;                                                \
        top    += top_linesize;                                                \
        bottom += bottom_linesize;                                             \
    }                                                                          \
}

Definition at line 259 of file vf_blend.c.

◆ A

#define A top[j]

Definition at line 285 of file vf_blend.c.

◆ B

#define B bottom[j]

Definition at line 286 of file vf_blend.c.

◆ MULTIPLY [1/6]

#define MULTIPLY	(	x,
		a,
		b
	)	((x) * (((a) * (b)) / 255))

Definition at line 288 of file vf_blend.c.

◆ SCREEN [1/6]

#define SCREEN	(	x,
		a,
		b
	)	(255 - (x) * ((255 - (a)) * (255 - (b)) / 255))

Definition at line 289 of file vf_blend.c.

◆ BURN [1/6]

#define BURN	(	a,
		b
	)	(((a) == 0) ? (a) : FFMAX(0, 255 - ((255 - (b)) << 8) / (a)))

Definition at line 290 of file vf_blend.c.

◆ DODGE [1/6]

#define DODGE	(	a,
		b
	)	(((a) == 255) ? (a) : FFMIN(255, (((b) << 8) / (255 - (a)))))

Definition at line 291 of file vf_blend.c.

◆ MULTIPLY [2/6]

#define MULTIPLY	(	x,
		a,
		b
	)	((x) * (((a) * (b)) / 65535))

Definition at line 288 of file vf_blend.c.

◆ SCREEN [2/6]

#define SCREEN	(	x,
		a,
		b
	)	(65535 - (x) * ((65535 - (a)) * (65535 - (b)) / 65535))

Definition at line 289 of file vf_blend.c.

◆ BURN [2/6]

#define BURN	(	a,
		b
	)	(((a) == 0) ? (a) : FFMAX(0, 65535 - ((65535 - (b)) << 16) / (a)))

Definition at line 290 of file vf_blend.c.

◆ DODGE [2/6]

#define DODGE	(	a,
		b
	)	(((a) == 65535) ? (a) : FFMIN(65535, (((b) << 16) / (65535 - (a)))))

Definition at line 291 of file vf_blend.c.

◆ MULTIPLY [3/6]

#define MULTIPLY	(	x,
		a,
		b
	)	((x) * (((a) * (b)) / 1023))

Definition at line 288 of file vf_blend.c.

◆ SCREEN [3/6]

#define SCREEN	(	x,
		a,
		b
	)	(1023 - (x) * ((1023 - (a)) * (1023 - (b)) / 1023))

Definition at line 289 of file vf_blend.c.

◆ BURN [3/6]

#define BURN	(	a,
		b
	)	(((a) == 0) ? (a) : FFMAX(0, 1023 - ((1023 - (b)) << 10) / (a)))

Definition at line 290 of file vf_blend.c.

◆ DODGE [3/6]

#define DODGE	(	a,
		b
	)	(((a) == 1023) ? (a) : FFMIN(1023, (((b) << 10) / (1023 - (a)))))

Definition at line 291 of file vf_blend.c.

◆ MULTIPLY [4/6]

#define MULTIPLY	(	x,
		a,
		b
	)	((x) * (((a) * (b)) / 4095))

Definition at line 288 of file vf_blend.c.

◆ SCREEN [4/6]

#define SCREEN	(	x,
		a,
		b
	)	(4095 - (x) * ((4095 - (a)) * (4095 - (b)) / 4095))

Definition at line 289 of file vf_blend.c.

◆ BURN [4/6]

#define BURN	(	a,
		b
	)	(((a) == 0) ? (a) : FFMAX(0, 4095 - ((4095 - (b)) << 12) / (a)))

Definition at line 290 of file vf_blend.c.

◆ DODGE [4/6]

#define DODGE	(	a,
		b
	)	(((a) == 4095) ? (a) : FFMIN(4095, (((b) << 12) / (4095 - (a)))))

Definition at line 291 of file vf_blend.c.

◆ MULTIPLY [5/6]

#define MULTIPLY	(	x,
		a,
		b
	)	((x) * (((a) * (b)) / 511))

Definition at line 288 of file vf_blend.c.

◆ SCREEN [5/6]

#define SCREEN	(	x,
		a,
		b
	)	(511 - (x) * ((511 - (a)) * (511 - (b)) / 511))

Definition at line 289 of file vf_blend.c.

◆ BURN [5/6]

#define BURN	(	a,
		b
	)	(((a) == 0) ? (a) : FFMAX(0, 511 - ((511 - (b)) << 9) / (a)))

Definition at line 290 of file vf_blend.c.

◆ DODGE [5/6]

#define DODGE	(	a,
		b
	)	(((a) == 511) ? (a) : FFMIN(511, (((b) << 9) / (511 - (a)))))

Definition at line 291 of file vf_blend.c.

◆ MULTIPLY [6/6]

#define MULTIPLY	(	x,
		a,
		b
	)	((x) * (((a) * (b)) / 1.0))

Definition at line 288 of file vf_blend.c.

◆ SCREEN [6/6]

#define SCREEN	(	x,
		a,
		b
	)	(1.0 - (x) * ((1.0 - (a)) * (1.0 - (b)) / 1.0))

Definition at line 289 of file vf_blend.c.

◆ BURN [6/6]

#define BURN	(	a,
		b
	)	(((a) <= 0.0) ? (a) : FFMAX(0.0, 1.0 - (1.0 - (b)) / (a)))

Definition at line 290 of file vf_blend.c.

◆ DODGE [6/6]

#define DODGE	(	a,
		b
	)	(((a) >= 1.0) ? (a) : FFMIN(1.0, ((b) / (1.0 - (a)))))

Definition at line 291 of file vf_blend.c.

◆ DEFINE_BLEND_EXPR

#define DEFINE_BLEND_EXPR	(	type,
		name,
		div
	)

Value:

static void blend_expr_## name(const uint8_t *_top, ptrdiff_t top_linesize,          \
                               const uint8_t *_bottom, ptrdiff_t bottom_linesize,    \
                               uint8_t *_dst, ptrdiff_t dst_linesize,                \
                               ptrdiff_t width, ptrdiff_t height,              \
                               FilterParams *param, double *values, int starty) \
{                                                                              \
    const type *top = (type*)_top;                                             \
    const type *bottom = (type*)_bottom;                                       \
    type *dst = (type*)_dst;                                                   \
    AVExpr *e = param->e;                                                      \
    int y, x;                                                                  \
    dst_linesize /= div;                                                       \
    top_linesize /= div;                                                       \
    bottom_linesize /= div;                                                    \
                                                                               \
    for (y = 0; y < height; y++) {                                             \
        values[VAR_Y] = y + starty;                                            \
        for (x = 0; x < width; x++) {                                          \
            values[VAR_X]      = x;                                            \
            values[VAR_TOP]    = values[VAR_A] = top[x];                       \
            values[VAR_BOTTOM] = values[VAR_B] = bottom[x];                    \
            dst[x] = av_expr_eval(e, values, NULL);                            \
        }                                                                      \
        dst    += dst_linesize;                                                \
        top    += top_linesize;                                                \
        bottom += bottom_linesize;                                             \
    }                                                                          \
}

◆ DEFINE_INIT_BLEND_FUNC

#define DEFINE_INIT_BLEND_FUNC	(	depth,
		nbits
	)

Definition at line 701 of file vf_blend.c.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
VAR_X
VAR_Y
VAR_W
VAR_H
VAR_SW
VAR_SH
VAR_T
VAR_N
VAR_A
VAR_B
VAR_TOP
VAR_BOTTOM
VAR_VARS_NB

Definition at line 52 of file vf_blend.c.

Function Documentation

◆ FRAMESYNC_DEFINE_CLASS()

FRAMESYNC_DEFINE_CLASS	(	blend	,
		BlendContext	,
		fs
	)

◆ blend_normal_8bit()

static void blend_normal_8bit	(	const uint8_t *	top,
		ptrdiff_t	top_linesize,
		const uint8_t *	bottom,
		ptrdiff_t	bottom_linesize,
		uint8_t *	dst,
		ptrdiff_t	dst_linesize,
		ptrdiff_t	width,
		ptrdiff_t	height,
		FilterParams *	param,
		double *	values,
		int	starty
	)

static

Definition at line 144 of file vf_blend.c.

◆ blend_normal_16bit()

static void blend_normal_16bit	(	const uint8_t *	_top,
		ptrdiff_t	top_linesize,
		const uint8_t *	_bottom,
		ptrdiff_t	bottom_linesize,
		uint8_t *	_dst,
		ptrdiff_t	dst_linesize,
		ptrdiff_t	width,
		ptrdiff_t	height,
		FilterParams *	param,
		double *	values,
		int	starty
	)

static

Definition at line 163 of file vf_blend.c.

◆ blend_normal_32bit()

static void blend_normal_32bit	(	const uint8_t *	_top,
		ptrdiff_t	top_linesize,
		const uint8_t *	_bottom,
		ptrdiff_t	bottom_linesize,
		uint8_t *	_dst,
		ptrdiff_t	dst_linesize,
		ptrdiff_t	width,
		ptrdiff_t	height,
		FilterParams *	param,
		double *	values,
		int	starty
	)

static

Definition at line 188 of file vf_blend.c.

◆ DEFINE_BLEND8()

DEFINE_BLEND8	(	multiply128	,
		av_clip_uint8((A - 128) *B/32.+128)
	)

Definition at line 298 of file vf_blend.c.

◆ blend_frame()

static AVFrame* blend_frame	(	AVFilterContext *	ctx,
		AVFrame *	top_buf,
		const AVFrame *	bottom_buf
	)

static

Definition at line 603 of file vf_blend.c.

Referenced by blend_frame_for_dualinput().

◆ blend_frame_for_dualinput()

static int blend_frame_for_dualinput ( FFFrameSync * fs )

static

Definition at line 636 of file vf_blend.c.

Referenced by init().

◆ init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 651 of file vf_blend.c.

◆ query_formats()

static int query_formats ( AVFilterContext * ctx )

static

Definition at line 661 of file vf_blend.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 689 of file vf_blend.c.

◆ ff_blend_init()

void ff_blend_init	(	FilterParams *	param,
		int	depth
	)

Definition at line 747 of file vf_blend.c.

Referenced by config_params().

◆ config_params()

static int config_params ( AVFilterContext * ctx )

static

Definition at line 783 of file vf_blend.c.

Referenced by config_output(), and process_command().

◆ config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 815 of file vf_blend.c.

◆ process_command()

static int process_command	(	AVFilterContext *	ctx,
		const char *	cmd,
		const char *	args,
		char *	res,
		int	res_len,
		int	flags
	)

static

Definition at line 869 of file vf_blend.c.

Variable Documentation

◆ var_names

const char* const var_names[] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL }

static

Definition at line 51 of file vf_blend.c.

Referenced by config_params().

◆ blend_options

const AVOption blend_options[]

static

Definition at line 66 of file vf_blend.c.

Data Structures

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

◆ TOP

◆ BOTTOM

◆ OFFSET

◆ FLAGS

◆ COPY

◆ DEFINE_BLEND8

◆ DEFINE_BLEND16

◆ DEFINE_BLEND32

◆ A

◆ B

◆ MULTIPLY [1/6]

◆ SCREEN [1/6]

◆ BURN [1/6]

◆ DODGE [1/6]

◆ MULTIPLY [2/6]

◆ SCREEN [2/6]

◆ BURN [2/6]

◆ DODGE [2/6]

◆ MULTIPLY [3/6]

◆ SCREEN [3/6]

◆ BURN [3/6]

◆ DODGE [3/6]

◆ MULTIPLY [4/6]

◆ SCREEN [4/6]

◆ BURN [4/6]

◆ DODGE [4/6]

◆ MULTIPLY [5/6]

◆ SCREEN [5/6]

◆ BURN [5/6]

◆ DODGE [5/6]

◆ MULTIPLY [6/6]

◆ SCREEN [6/6]

◆ BURN [6/6]

◆ DODGE [6/6]

◆ DEFINE_BLEND_EXPR

◆ DEFINE_INIT_BLEND_FUNC

Enumeration Type Documentation

◆ anonymous enum

Function Documentation

◆ FRAMESYNC_DEFINE_CLASS()

◆ blend_normal_8bit()

◆ blend_normal_16bit()

◆ blend_normal_32bit()

◆ DEFINE_BLEND8()

◆ blend_frame()

◆ blend_frame_for_dualinput()

◆ init()

◆ query_formats()

◆ uninit()

◆ ff_blend_init()

◆ config_params()

◆ config_output()

◆ process_command()

Variable Documentation

◆ var_names

◆ blend_options