FFmpeg
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overlay one video on top of another More...
#include "avfilter.h"
#include "formats.h"
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/avstring.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/timestamp.h"
#include "internal.h"
#include "dualinput.h"
#include "drawutils.h"
#include "video.h"
Go to the source code of this file.
Data Structures | |
struct | OverlayContext |
Macros | |
#define | MAIN 0 |
#define | OVERLAY 1 |
#define | R 0 |
#define | G 1 |
#define | B 2 |
#define | A 3 |
#define | Y 0 |
#define | U 1 |
#define | V 2 |
#define | FAST_DIV255(x) ((((x) + 128) * 257) >> 16) |
#define | UNPREMULTIPLY_ALPHA(x, y) ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x))) |
#define | OFFSET(x) offsetof(OverlayContext, x) |
#define | FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
Functions | |
static av_cold void | uninit (AVFilterContext *ctx) |
static int | normalize_xy (double d, int chroma_sub) |
static void | eval_expr (AVFilterContext *ctx) |
static int | set_expr (AVExpr **pexpr, const char *expr, const char *option, void *log_ctx) |
static int | process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags) |
static int | query_formats (AVFilterContext *ctx) |
static int | config_input_main (AVFilterLink *inlink) |
static int | config_input_overlay (AVFilterLink *inlink) |
static int | config_output (AVFilterLink *outlink) |
static void | blend_image (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y) |
Blend image in src to destination buffer dst at position (x, y). More... | |
static AVFrame * | do_blend (AVFilterContext *ctx, AVFrame *mainpic, const AVFrame *second) |
static int | filter_frame (AVFilterLink *inlink, AVFrame *inpicref) |
static int | request_frame (AVFilterLink *outlink) |
static av_cold int | init (AVFilterContext *ctx) |
AVFILTER_DEFINE_CLASS (overlay) | |
Variables | |
static const char *const | var_names [] |
static const char *const | eof_action_str [] |
static enum AVPixelFormat | alpha_pix_fmts [] |
static const AVOption | overlay_options [] |
static const AVFilterPad | avfilter_vf_overlay_inputs [] |
static const AVFilterPad | avfilter_vf_overlay_outputs [] |
AVFilter | ff_vf_overlay |
overlay one video on top of another
Definition in file vf_overlay.c.
#define MAIN 0 |
Definition at line 83 of file vf_overlay.c.
Referenced by config_input_overlay(), config_output(), Faac_encode_init(), and query_formats().
#define OVERLAY 1 |
Definition at line 84 of file vf_overlay.c.
Referenced by avfilter_register_all(), config_input_overlay(), and query_formats().
#define R 0 |
Definition at line 86 of file vf_overlay.c.
Referenced by blend_image().
#define G 1 |
Definition at line 87 of file vf_overlay.c.
Referenced by blend_image().
#define B 2 |
Definition at line 88 of file vf_overlay.c.
Referenced by blend_image().
#define A 3 |
Definition at line 89 of file vf_overlay.c.
Referenced by blend_image().
#define Y 0 |
Definition at line 91 of file vf_overlay.c.
#define U 1 |
Definition at line 92 of file vf_overlay.c.
#define V 2 |
Definition at line 93 of file vf_overlay.c.
#define FAST_DIV255 | ( | x | ) | ((((x) + 128) * 257) >> 16) |
Definition at line 367 of file vf_overlay.c.
Referenced by blend_image().
#define UNPREMULTIPLY_ALPHA | ( | x, | |
y | |||
) | ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x))) |
Definition at line 373 of file vf_overlay.c.
Referenced by blend_image().
#define OFFSET | ( | x | ) | offsetof(OverlayContext, x) |
Definition at line 626 of file vf_overlay.c.
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
Definition at line 627 of file vf_overlay.c.
enum var_name |
Definition at line 58 of file vf_overlay.c.
enum EOFAction |
Enumerator | |
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EOF_ACTION_REPEAT | |
EOF_ACTION_ENDALL | |
EOF_ACTION_PASS |
Definition at line 73 of file vf_overlay.c.
enum EvalMode |
Enumerator | |
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EVAL_MODE_ONCE | |
EVAL_MODE_FRAME | |
EVAL_MODE_NB | |
EVAL_MODE_INIT | |
EVAL_MODE_FRAME | |
EVAL_MODE_NB | |
EVAL_MODE_INIT | |
EVAL_MODE_FRAME | |
EVAL_MODE_NB |
Definition at line 95 of file vf_overlay.c.
enum OverlayFormat |
Enumerator | |
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OVERLAY_FORMAT_YUV420 | |
OVERLAY_FORMAT_YUV422 | |
OVERLAY_FORMAT_YUV444 | |
OVERLAY_FORMAT_RGB | |
OVERLAY_FORMAT_NB |
Definition at line 101 of file vf_overlay.c.
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Definition at line 137 of file vf_overlay.c.
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inlinestatic |
Definition at line 146 of file vf_overlay.c.
Referenced by eval_expr().
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Definition at line 153 of file vf_overlay.c.
Referenced by config_input_overlay(), do_blend(), and process_command().
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Definition at line 164 of file vf_overlay.c.
Referenced by config_input_overlay(), and process_command().
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Definition at line 185 of file vf_overlay.c.
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Definition at line 210 of file vf_overlay.c.
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Definition at line 285 of file vf_overlay.c.
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Definition at line 301 of file vf_overlay.c.
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Definition at line 349 of file vf_overlay.c.
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Blend image in src to destination buffer dst at position (x, y).
< the amount of overlay to blend on to main
< the amount of overlay to blend on to main
Definition at line 378 of file vf_overlay.c.
Referenced by do_blend().
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Definition at line 566 of file vf_overlay.c.
Referenced by init().
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Definition at line 591 of file vf_overlay.c.
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Definition at line 598 of file vf_overlay.c.
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Definition at line 604 of file vf_overlay.c.
AVFILTER_DEFINE_CLASS | ( | overlay | ) |
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Definition at line 43 of file vf_overlay.c.
Referenced by set_expr().
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Definition at line 79 of file vf_overlay.c.
Referenced by config_input_overlay().
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Definition at line 279 of file vf_overlay.c.
Referenced by config_input_main(), and config_input_overlay().
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Definition at line 629 of file vf_overlay.c.
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Definition at line 654 of file vf_overlay.c.
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Definition at line 671 of file vf_overlay.c.
AVFilter ff_vf_overlay |
Definition at line 681 of file vf_overlay.c.