FFmpeg
blend.h
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2013 Paul B Mahol
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVFILTER_BLEND_H
22 #define AVFILTER_BLEND_H
23 
24 #include "libavutil/eval.h"
25 #include "avfilter.h"
26 
27 enum BlendMode {
63 };
64 
65 typedef struct FilterParams {
67  double opacity;
69  char *expr_str;
70  void (*blend)(const uint8_t *top, ptrdiff_t top_linesize,
71  const uint8_t *bottom, ptrdiff_t bottom_linesize,
72  uint8_t *dst, ptrdiff_t dst_linesize,
73  ptrdiff_t width, ptrdiff_t height,
74  struct FilterParams *param, double *values, int starty);
75 } FilterParams;
76 
77 void ff_blend_init(FilterParams *param, int depth);
78 void ff_blend_init_x86(FilterParams *param, int depth);
79 
80 #endif /* AVFILTER_BLEND_H */
AVExpr * e
Definition: blend.h:68
double opacity
Definition: blend.h:67
void(* blend)(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, struct FilterParams *param, double *values, int starty)
Definition: blend.h:70
Main libavfilter public API header.
Definition: blend.h:62
uint8_t
char * expr_str
Definition: blend.h:69
Definition: eval.c:157
#define height
enum BlendMode mode
Definition: blend.h:66
#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
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
filter data
Definition: mlp.h:74
void ff_blend_init(FilterParams *param, int depth)
Definition: vf_blend.c:648
void ff_blend_init_x86(FilterParams *param, int depth)
BlendMode
Definition: blend.h:27
Definition: blend.h:44
simple arithmetic expression evaluator