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FFmpeg
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vf_blend.c File Reference
#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 "video.h"
Include dependency graph for vf_blend.c:
Go to the source code of this file.
Data Structures | |
| struct | FilterParams |
| filter data More... | |
| struct | BlendContext |
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 |
| #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)))) |
Typedefs | |
| typedef struct FilterParams | FilterParams |
Enumerations | |
| enum | BlendMode { BLEND_UNSET = -1, BLEND_NORMAL, BLEND_ADDITION, BLEND_AND, BLEND_AVERAGE, BLEND_BURN, BLEND_DARKEN, BLEND_DIFFERENCE, 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 height, FilterParams *param) |
| DEFINE_BLEND (overlay,(A< 128)?MULTIPLY(2, A, B):SCREEN(2, A, B)) | |
| static av_cold int | init (AVFilterContext *ctx) |
| static int | query_formats (AVFilterContext *ctx) |
| static int | config_output (AVFilterLink *outlink) |
| static int | config_input_top (AVFilterLink *inlink) |
| static av_cold void | uninit (AVFilterContext *ctx) |
| static int | request_frame (AVFilterLink *outlink) |
| static void | blend_frame (AVFilterContext *ctx, AVFrame *top_buf, AVFrame *bottom_buf, AVFrame *dst_buf) |
| static int | filter_frame (AVFilterLink *inlink, AVFrame *buf) |
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 [] |
| static const AVFilterPad | blend_inputs [] |
| static const AVFilterPad | blend_outputs [] |
| AVFilter | avfilter_vf_blend |
Macro Definition Documentation
| #define A top[j] |
Definition at line 167 of file vf_blend.c.
| #define B bottom[j] |
Definition at line 168 of file vf_blend.c.
| #define BOTTOM 1 |
Definition at line 32 of file vf_blend.c.
Referenced by config_output(), filter_frame(), and request_frame().
Definition at line 172 of file vf_blend.c.
| #define DEFINE_BLEND | ( | name, | |
| expr | |||
| ) |
Value:
{ \
double opacity = param->opacity; \
dst[j] = top[j] + ((expr) - top[j]) * opacity; \
} \
dst += dst_linesize; \
top += top_linesize; \
bottom += bottom_linesize; \
} \
}
Definition at line 148 of file vf_blend.c.
Definition at line 173 of file vf_blend.c.
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
Definition at line 93 of file vf_blend.c.
| #define OFFSET | ( | x | ) | offsetof(BlendContext, x) |
Definition at line 92 of file vf_blend.c.
Definition at line 171 of file vf_blend.c.
| #define TOP 0 |
Definition at line 31 of file vf_blend.c.
Referenced by config_output(), and request_frame().
Typedef Documentation
| typedef struct FilterParams FilterParams |
Enumeration Type Documentation
| 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 64 of file vf_blend.c.
| enum BlendMode |
Definition at line 34 of file vf_blend.c.
Function Documentation
| AVFILTER_DEFINE_CLASS | ( | blend | ) |
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static |
Definition at line 365 of file vf_blend.c.
Referenced by filter_frame().
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Definition at line 140 of file vf_blend.c.
Referenced by init().
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Definition at line 327 of file vf_blend.c.
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Definition at line 293 of file vf_blend.c.
Definition at line 182 of file vf_blend.c.
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Definition at line 397 of file vf_blend.c.
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Definition at line 223 of file vf_blend.c.
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Definition at line 280 of file vf_blend.c.
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Definition at line 349 of file vf_blend.c.
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Definition at line 337 of file vf_blend.c.
Variable Documentation
| AVFilter avfilter_vf_blend |
Initial value:
= {
.name = "blend",
.description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
.init = init,
.uninit = uninit,
.priv_size = sizeof(BlendContext),
.inputs = blend_inputs,
.outputs = blend_outputs,
.priv_class = &blend_class,
}
Definition: vf_blend.c:78
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: libavutil/internal.h:123
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:216
Definition at line 457 of file vf_blend.c.
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static |
Initial value:
= {
{
.name = "top",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input_top,
.filter_frame = filter_frame,
},{
.name = "bottom",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
}
Definition: avutil.h:143
Definition at line 433 of file vf_blend.c.
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Definition at line 95 of file vf_blend.c.
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Initial value:
= {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
.request_frame = request_frame,
},
{ NULL }
}
Definition: avutil.h:143
Definition at line 447 of file vf_blend.c.
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