#include "libavutil/imgutils.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixfmt.h"
#include "avfilter.h"
#include "bufferqueue.h"
#include "formats.h"
#include "internal.h"
#include "dualinput.h"
#include "video.h"

Data Structures
struct	FilterParams
	filter data More...

struct	ThreadData

struct	BlendContext

Macros
#define	TOP 0

#define	BOTTOM 1

#define	COMMON_OPTIONS

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

#define	FLAGS AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_VIDEO_PARAM

#define	DEFINE_BLEND(name, expr)

#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)))))

Enumerations
enum	BlendMode { BLEND_UNSET = -1, BLEND_NORMAL, BLEND_ADDITION, BLEND_AND, BLEND_AVERAGE, BLEND_BURN, BLEND_DARKEN, BLEND_DIFFERENCE, BLEND_DIFFERENCE128, BLEND_DIVIDE, BLEND_DODGE, BLEND_EXCLUSION, BLEND_HARDLIGHT, BLEND_LIGHTEN, BLEND_MULTIPLY, BLEND_NEGATION, BLEND_OR, BLEND_OVERLAY, BLEND_PHOENIX, BLEND_PINLIGHT, BLEND_REFLECT, BLEND_SCREEN, BLEND_SOFTLIGHT, BLEND_SUBTRACT, BLEND_VIVIDLIGHT, BLEND_XOR, BLEND_NB }

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
	AVFILTER_DEFINE_CLASS (blend)

static void	blend_normal (const uint8_t top, int top_linesize, const uint8_t bottom, int bottom_linesize, uint8_t dst, int dst_linesize, int width, int start, int end, FilterParams param, double *values)

	DEFINE_BLEND (overlay,(A< 128)?MULTIPLY(2, A, B):SCREEN(2, A, B))

static int	filter_slice (AVFilterContext ctx, void arg, int jobnr, int nb_jobs)

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

static av_cold int	init (AVFilterContext *ctx)

static int	query_formats (AVFilterContext *ctx)

static av_cold void	uninit (AVFilterContext *ctx)

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

#define TOP 0

Definition at line 32 of file vf_blend.c.

Referenced by decode_pixel_in_context(), mss4_decode_dct(), mss4_decode_dct_block(), and mss4_update_dc_cache().

#define BOTTOM 1

Definition at line 33 of file vf_blend.c.

#define COMMON_OPTIONS

Definition at line 103 of file vf_blend.c.

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

Definition at line 145 of file vf_blend.c.

#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 146 of file vf_blend.c.

#define DEFINE_BLEND	(	name,
		expr
	)

Value:

static void blend_## name(const uint8_t *top, int top_linesize,       \
                          const uint8_t *bottom, int bottom_linesize, \
                          uint8_t *dst, int dst_linesize,             \
                          int width, int start, int end,              \
                          FilterParams *param, double *values)        \
{                                                                     \
    double opacity = param->opacity;                                  \
    int i, j;                                                         \
                                                                      \
    for (i = start; i < end; 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 166 of file vf_blend.c.

#define A top[j]

Definition at line 186 of file vf_blend.c.

#define B bottom[j]

Definition at line 187 of file vf_blend.c.

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

Definition at line 189 of file vf_blend.c.

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

Definition at line 190 of file vf_blend.c.

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

Definition at line 191 of file vf_blend.c.

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

Definition at line 192 of file vf_blend.c.

Enumeration Type Documentation

enum BlendMode

Enumerator:

BLEND_UNSET
BLEND_NORMAL
BLEND_ADDITION
BLEND_AND
BLEND_AVERAGE
BLEND_BURN
BLEND_DARKEN
BLEND_DIFFERENCE
BLEND_DIFFERENCE128
BLEND_DIVIDE
BLEND_DODGE
BLEND_EXCLUSION
BLEND_HARDLIGHT
BLEND_LIGHTEN
BLEND_MULTIPLY
BLEND_NEGATION
BLEND_OR
BLEND_OVERLAY
BLEND_PHOENIX
BLEND_PINLIGHT
BLEND_REFLECT
BLEND_SCREEN
BLEND_SOFTLIGHT
BLEND_SUBTRACT
BLEND_VIVIDLIGHT
BLEND_XOR
BLEND_NB

Definition at line 35 of file vf_blend.c.

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 66 of file vf_blend.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( blend )

static void blend_normal	(	const uint8_t *	top,
		int	top_linesize,
		const uint8_t *	bottom,
		int	bottom_linesize,
		uint8_t *	dst,
		int	dst_linesize,
		int	width,
		int	start,
		int	end,
		FilterParams *	param,
		double *	values
	)

static

Definition at line 157 of file vf_blend.c.

Referenced by init().

DEFINE_BLEND	(	overlay	,
		(A< 128)?MULTIPLY(2, A, B):SCREEN(2, A, B)
	)

Definition at line 202 of file vf_blend.c.

static int filter_slice	(	AVFilterContext *	ctx,
		void *	arg,
		int	jobnr,
		int	nb_jobs
	)

static

Definition at line 242 of file vf_blend.c.

Referenced by blend_frame().

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

static

Definition at line 269 of file vf_blend.c.

Referenced by init().

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 302 of file vf_blend.c.

static int query_formats ( AVFilterContext * ctx )

static

Definition at line 363 of file vf_blend.c.

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 376 of file vf_blend.c.

Variable Documentation

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

static

Definition at line 65 of file vf_blend.c.

Referenced by init().

const AVOption blend_options[]

static

Initial value:

= {
    COMMON_OPTIONS,
    { "shortest",    "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
    { "repeatlast",  "repeat last bottom frame", OFFSET(dinput.repeatlast), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS },
    { NULL }
}

Definition at line 148 of file vf_blend.c.

Data Structures

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation