FFmpeg
vf_overlay.h
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
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8  *
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11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
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15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #ifndef AVFILTER_OVERLAY_H
20 #define AVFILTER_OVERLAY_H
21 
22 #include "libavutil/eval.h"
23 #include "libavutil/pixdesc.h"
24 #include "framesync.h"
25 #include "avfilter.h"
26 
27 enum var_name {
40 };
41 
50 };
51 
52 typedef struct OverlayContext {
53  const AVClass *class;
54  int x, y; ///< position of overlaid picture
55 
62  int format; ///< OverlayFormat
64  int eval_mode; ///< EvalMode
65 
67 
68  int main_pix_step[4]; ///< steps per pixel for each plane of the main output
69  int overlay_pix_step[4]; ///< steps per pixel for each plane of the overlay
70  int hsub, vsub; ///< chroma subsampling values
71  const AVPixFmtDescriptor *main_desc; ///< format descriptor for main input
72 
74  char *x_expr, *y_expr;
75 
77 
78  int (*blend_row[4])(uint8_t *d, uint8_t *da, uint8_t *s, uint8_t *a, int w,
79  ptrdiff_t alinesize);
80  int (*blend_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
82 
83 void ff_overlay_init_x86(OverlayContext *s, int format, int pix_format,
84  int alpha_format, int main_has_alpha);
85 
86 #endif /* AVFILTER_OVERLAY_H */
Main libavfilter public API header.
const AVPixFmtDescriptor * main_desc
format descriptor for main input
Definition: vf_overlay.h:71
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
void ff_overlay_init_x86(OverlayContext *s, int format, int pix_format, int alpha_format, int main_has_alpha)
char * x_expr
Definition: vf_overlay.h:74
uint8_t
double var_values[VAR_VARS_NB]
Definition: vf_overlay.h:73
Definition: eval.c:157
uint8_t overlay_rgba_map[4]
Definition: vf_overlay.h:60
AVExpr * y_pexpr
Definition: vf_overlay.h:76
int eval_mode
EvalMode.
Definition: vf_overlay.h:64
int format
OverlayFormat.
Definition: vf_overlay.h:62
Frame sync structure.
Definition: framesync.h:146
int(* blend_row[4])(uint8_t *d, uint8_t *da, uint8_t *s, uint8_t *a, int w, ptrdiff_t alinesize)
Definition: vf_overlay.h:78
uint8_t main_has_alpha
Definition: vf_overlay.h:58
const char * arg
Definition: jacosubdec.c:66
var_name
Definition: aeval.c:46
uint8_t main_rgba_map[4]
Definition: vf_overlay.h:57
uint8_t w
Definition: llviddspenc.c:38
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
OverlayFormat
Definition: vf_overlay.h:42
int(* blend_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.h:80
int main_pix_step[4]
steps per pixel for each plane of the main output
Definition: vf_overlay.h:68
char * y_expr
Definition: vf_overlay.h:74
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
AVExpr * x_pexpr
Definition: vf_overlay.h:76
int y
position of overlaid picture
Definition: vf_overlay.h:54
Describe the class of an AVClass context structure.
Definition: log.h:67
uint8_t overlay_has_alpha
Definition: vf_overlay.h:61
uint8_t overlay_is_packed_rgb
Definition: vf_overlay.h:59
int overlay_pix_step[4]
steps per pixel for each plane of the overlay
Definition: vf_overlay.h:69
int
int vsub
chroma subsampling values
Definition: vf_overlay.h:70
uint8_t main_is_packed_rgb
Definition: vf_overlay.h:56
An instance of a filter.
Definition: avfilter.h:338
FFFrameSync fs
Definition: vf_overlay.h:66
simple arithmetic expression evaluator