vf_blend.c File Reference

#include "config_components.h"
#include "libavutil/eval.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixfmt.h"
#include "avfilter.h"
#include "filters.h"
#include "framesync.h"
#include "vf_blend_init.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	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
#define	DEFINE_BLEND_EXPR(type, name, div)

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 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 int	blend_frame_for_dualinput (FFFrameSync *fs)
static av_cold int	init (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
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 []
static enum AVPixelFormat	pix_fmts []
static const AVFilterPad	blend_outputs []

Macro Definition Documentation

TOP

#define TOP   0

Definition at line 34 of file vf_blend.c.

BOTTOM

#define BOTTOM   1

Definition at line 35 of file vf_blend.c.

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(BlendContext, x)

Definition at line 66 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 67 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, SliceParams *sliceparam)   \
{                                                                              \
    const type *top = (const type*)_top;                                       \
    const type *bottom = (const type*)_bottom;                                 \
    double *values = sliceparam->values;                                       \
    int starty = sliceparam->starty;                                           \
    type *dst = (type*)_dst;                                                   \
    AVExpr *e = sliceparam->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;                                             \
    }                                                                          \
}

Definition at line 132 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 55 of file vf_blend.c.

Function Documentation

FRAMESYNC_DEFINE_CLASS()

FRAMESYNC_DEFINE_CLASS	(	blend	,
		BlendContext	,
		fs	)

filter_slice()

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

static

Definition at line 168 of file vf_blend.c.

blend_frame()

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

static

Definition at line 198 of file vf_blend.c.

Referenced by blend_frame_for_dualinput(), and init().

blend_frame_for_dualinput()

static int blend_frame_for_dualinput ( FFFrameSync * fs )

static

Definition at line 236 of file vf_blend.c.

Referenced by init().

init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 251 of file vf_blend.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 283 of file vf_blend.c.

config_params()

static int config_params ( AVFilterContext * ctx )

static

Definition at line 301 of file vf_blend.c.

Referenced by config_output(), and process_command().

config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 342 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 394 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 54 of file vf_blend.c.

blend_options

const AVOption blend_options[]

static

Definition at line 69 of file vf_blend.c.

pix_fmts

enum AVPixelFormat pix_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
    AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
    AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
    AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,
    AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
    AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GRAY9,
    AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV440P10,
    AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
    AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GRAY10,
    AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
    AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
    AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GRAY12,
    AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_GBRP14,
    AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
    AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
    AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GRAY16,
    AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32, AV_PIX_FMT_GRAYF32,
    AV_PIX_FMT_NONE
}

Definition at line 262 of file vf_blend.c.

blend_outputs

const AVFilterPad blend_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .config_props  = config_output,
    },
}

Definition at line 406 of file vf_blend.c.