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 
52 };
53 
54 typedef struct OverlayContext {
55  const AVClass *class;
56  int x, y; ///< position of overlaid picture
57 
64  int format; ///< OverlayFormat
66  int eval_mode; ///< EvalMode
67 
69 
70  int main_pix_step[4]; ///< steps per pixel for each plane of the main output
71  int overlay_pix_step[4]; ///< steps per pixel for each plane of the overlay
72  int hsub, vsub; ///< chroma subsampling values
73  const AVPixFmtDescriptor *main_desc; ///< format descriptor for main input
74 
76  char *x_expr, *y_expr;
77 
79 
80  int (*blend_row[4])(uint8_t *d, uint8_t *da, uint8_t *s, uint8_t *a, int w,
81  ptrdiff_t alinesize);
82  int (*blend_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
84 
85 void ff_overlay_init_x86(OverlayContext *s, int format, int pix_format,
86  int alpha_format, int main_has_alpha);
87 
88 #endif /* AVFILTER_OVERLAY_H */
Main libavfilter public API header.
const AVPixFmtDescriptor * main_desc
format descriptor for main input
Definition: vf_overlay.h:73
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:76
uint8_t
double var_values[VAR_VARS_NB]
Definition: vf_overlay.h:75
Definition: eval.c:157
uint8_t overlay_rgba_map[4]
Definition: vf_overlay.h:62
AVExpr * y_pexpr
Definition: vf_overlay.h:78
int eval_mode
EvalMode.
Definition: vf_overlay.h:66
int format
OverlayFormat.
Definition: vf_overlay.h:64
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:80
uint8_t main_has_alpha
Definition: vf_overlay.h:60
const char * arg
Definition: jacosubdec.c:66
var_name
Definition: aeval.c:46
uint8_t main_rgba_map[4]
Definition: vf_overlay.h:59
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:82
int main_pix_step[4]
steps per pixel for each plane of the main output
Definition: vf_overlay.h:70
char * y_expr
Definition: vf_overlay.h:76
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:78
int y
position of overlaid picture
Definition: vf_overlay.h:56
Describe the class of an AVClass context structure.
Definition: log.h:67
uint8_t overlay_has_alpha
Definition: vf_overlay.h:63
uint8_t overlay_is_packed_rgb
Definition: vf_overlay.h:61
int overlay_pix_step[4]
steps per pixel for each plane of the overlay
Definition: vf_overlay.h:71
int
int vsub
chroma subsampling values
Definition: vf_overlay.h:72
uint8_t main_is_packed_rgb
Definition: vf_overlay.h:58
An instance of a filter.
Definition: avfilter.h:341
FFFrameSync fs
Definition: vf_overlay.h:68
simple arithmetic expression evaluator