FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
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 "formats.h"
#include "framesync.h"
#include "internal.h"
#include "video.h"
#include "blend.h"

Go to the source code of this file.

Data Structures

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

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 COPY(src, depth)
 
#define DEFINE_BLEND8(name, expr)
 
#define DEFINE_BLEND16(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 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)
 
 DEFINE_BLEND8 (multiply128, av_clip_uint8((A-128)*B/32.+128))
 
static AVFrameblend_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_output (AVFilterLink *outlink)
 

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 config_output().

#define BOTTOM   1

Definition at line 33 of file vf_blend.c.

Referenced by config_output().

#define COMMON_OPTIONS

Definition at line 62 of file vf_blend.c.

Referenced by config_output().

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

Definition at line 114 of file vf_blend.c.

Definition at line 115 of file vf_blend.c.

#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); \
}
#define src
Definition: vp8dsp.c:254
uint8_t
#define height
#define _
#define width
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 the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return values
filter data
Definition: mlp.h:74
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:338

Definition at line 124 of file vf_blend.c.

#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; \
} \
}
uint8_t
#define height
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define width
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 the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return values
filter data
Definition: mlp.h:74
int
for(j=16;j >0;--j)
const char * name
Definition: opengl_enc.c:102

Definition at line 187 of file vf_blend.c.

#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; \
} \
}
uint8_t
#define height
#define _
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define width
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 the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return values
filter data
Definition: mlp.h:74
int
#define bit(string, value)
Definition: cbs_mpeg2.c:58
for(j=16;j >0;--j)
const char * name
Definition: opengl_enc.c:102

Definition at line 207 of file vf_blend.c.

#define A   top[j]

Definition at line 233 of file vf_blend.c.

#define B   bottom[j]

Definition at line 234 of file vf_blend.c.

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

Definition at line 236 of file vf_blend.c.

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

Definition at line 237 of file vf_blend.c.

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

Definition at line 238 of file vf_blend.c.

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

Definition at line 239 of file vf_blend.c.

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

Definition at line 236 of file vf_blend.c.

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

Definition at line 237 of file vf_blend.c.

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

Definition at line 238 of file vf_blend.c.

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

Definition at line 239 of file vf_blend.c.

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

Definition at line 236 of file vf_blend.c.

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

Definition at line 237 of file vf_blend.c.

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

Definition at line 238 of file vf_blend.c.

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

Definition at line 239 of file vf_blend.c.

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

Definition at line 236 of file vf_blend.c.

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

Definition at line 237 of file vf_blend.c.

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

Definition at line 238 of file vf_blend.c.

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

Definition at line 239 of file vf_blend.c.

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

Definition at line 236 of file vf_blend.c.

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

Definition at line 237 of file vf_blend.c.

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

Definition at line 238 of file vf_blend.c.

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

Definition at line 239 of file vf_blend.c.

#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_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 NULL
Definition: coverity.c:32
GLint GLenum type
Definition: opengl_enc.c:104
uint8_t
Definition: vf_blend.c:51
#define height
Definition: vf_blend.c:51
Definition: vf_blend.c:51
#define width
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 the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return values
filter data
Definition: mlp.h:74
Definition: vf_blend.c:51
int
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:738
for(j=16;j >0;--j)
const char * name
Definition: opengl_enc.c:102
#define DEFINE_INIT_BLEND_FUNC (   depth,
  nbits 
)

Definition at line 603 of file vf_blend.c.

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 51 of file vf_blend.c.

Function Documentation

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

Definition at line 143 of file vf_blend.c.

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 162 of file vf_blend.c.

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

Definition at line 246 of file vf_blend.c.

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

Definition at line 507 of file vf_blend.c.

Referenced by blend_frame_for_dualinput(), and config_output().

static int blend_frame_for_dualinput ( FFFrameSync fs)
static

Definition at line 540 of file vf_blend.c.

Referenced by init().

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 555 of file vf_blend.c.

Referenced by config_output().

static int query_formats ( AVFilterContext ctx)
static

Definition at line 565 of file vf_blend.c.

Referenced by config_output().

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 591 of file vf_blend.c.

Referenced by config_output().

void ff_blend_init ( FilterParams param,
int  depth 
)

Definition at line 648 of file vf_blend.c.

Referenced by config_output().

static int config_output ( AVFilterLink outlink)
static

Definition at line 681 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 50 of file vf_blend.c.

Referenced by config_output().

const AVOption blend_options[]
static
Initial value:
= {
{ NULL }
}
#define NULL
Definition: coverity.c:32
#define COMMON_OPTIONS
Definition: vf_blend.c:62

Definition at line 117 of file vf_blend.c.