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vf_overlay.c File Reference

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 "drawutils.h"
#include "framesync.h"
#include "video.h"
#include "vf_overlay.h"

Go to the source code of this file.

Data Structures

struct  ThreadData
 

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
 

Enumerations

enum  EvalMode {
  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, EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB,
  EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB, EVAL_MODE_INIT,
  EVAL_MODE_FRAME, EVAL_MODE_NB, EVAL_MODE_INIT, EVAL_MODE_FRAME,
  EVAL_MODE_NB
}
 

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_overlay (AVFilterLink *inlink)
 
static int config_output (AVFilterLink *outlink)
 
static av_always_inline void blend_slice_packed_rgb (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int main_has_alpha, int x, int y, int is_straight, int jobnr, int nb_jobs)
 Blend image in src to destination buffer dst at position (x, y). More...
 
static av_always_inline void blend_plane (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int src_w, int src_h, int dst_w, int dst_h, int i, int hsub, int vsub, int x, int y, int main_has_alpha, int dst_plane, int dst_offset, int dst_step, int straight, int yuv, int jobnr, int nb_jobs)
 
static void alpha_composite (const AVFrame *src, const AVFrame *dst, int src_w, int src_h, int dst_w, int dst_h, int x, int y, int jobnr, int nb_jobs)
 
static av_always_inline void blend_slice_yuv (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int hsub, int vsub, int main_has_alpha, int x, int y, int is_straight, int jobnr, int nb_jobs)
 
static av_always_inline void blend_slice_planar_rgb (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int hsub, int vsub, int main_has_alpha, int x, int y, int is_straight, int jobnr, int nb_jobs)
 
static int blend_slice_yuv420 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_yuva420 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_yuv422 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_yuva422 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_yuv444 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_yuva444 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_gbrp (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_gbrap (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_yuv420_pm (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_yuva420_pm (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_yuv422_pm (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_yuva422_pm (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_yuv444_pm (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_yuva444_pm (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_gbrp_pm (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_gbrap_pm (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_rgb (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_rgba (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_rgb_pm (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int blend_slice_rgba_pm (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int config_input_main (AVFilterLink *inlink)
 
static int do_blend (FFFrameSync *fs)
 
static av_cold int init (AVFilterContext *ctx)
 
static int activate (AVFilterContext *ctx)
 
 FRAMESYNC_DEFINE_CLASS (overlay, OverlayContext, fs)
 

Variables

static const char *const var_names []
 
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
 

Detailed Description

overlay one video on top of another

Definition in file vf_overlay.c.

Macro Definition Documentation

#define MAIN   0

Definition at line 63 of file vf_overlay.c.

Referenced by config_input_overlay(), config_output(), and query_formats().

#define OVERLAY   1

Definition at line 64 of file vf_overlay.c.

Referenced by config_input_overlay(), and query_formats().

#define R   0

Definition at line 66 of file vf_overlay.c.

Referenced by blend_slice_packed_rgb().

#define G   1

Definition at line 67 of file vf_overlay.c.

Referenced by blend_slice_packed_rgb().

#define B   2

Definition at line 68 of file vf_overlay.c.

Referenced by blend_slice_packed_rgb().

#define A   3

Definition at line 69 of file vf_overlay.c.

Referenced by blend_slice_packed_rgb().

#define Y   0

Definition at line 71 of file vf_overlay.c.

#define U   1

Definition at line 72 of file vf_overlay.c.

#define V   2

Definition at line 73 of file vf_overlay.c.

#define FAST_DIV255 (   x)    ((((x) + 128) * 257) >> 16)

Definition at line 345 of file vf_overlay.c.

Referenced by alpha_composite(), blend_plane(), and blend_slice_packed_rgb().

#define UNPREMULTIPLY_ALPHA (   x,
 
)    ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)))

Definition at line 351 of file vf_overlay.c.

Referenced by alpha_composite(), blend_plane(), and blend_slice_packed_rgb().

#define OFFSET (   x)    offsetof(OverlayContext, x)

Definition at line 990 of file vf_overlay.c.

Definition at line 991 of file vf_overlay.c.

Enumeration Type Documentation

enum EvalMode
Enumerator
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 
EVAL_MODE_INIT 
EVAL_MODE_FRAME 
EVAL_MODE_NB 
EVAL_MODE_INIT 
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 75 of file vf_overlay.c.

Function Documentation

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 81 of file vf_overlay.c.

static int normalize_xy ( double  d,
int  chroma_sub 
)
inlinestatic

Definition at line 90 of file vf_overlay.c.

Referenced by eval_expr().

static void eval_expr ( AVFilterContext ctx)
static

Definition at line 97 of file vf_overlay.c.

Referenced by config_input_overlay(), do_blend(), and process_command().

static int set_expr ( AVExpr **  pexpr,
const char *  expr,
const char *  option,
void log_ctx 
)
static

Definition at line 109 of file vf_overlay.c.

Referenced by config_input_overlay(), and 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 130 of file vf_overlay.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 161 of file vf_overlay.c.

static int config_input_overlay ( AVFilterLink inlink)
static

Definition at line 280 of file vf_overlay.c.

static int config_output ( AVFilterLink outlink)
static

Definition at line 327 of file vf_overlay.c.

static av_always_inline void blend_slice_packed_rgb ( AVFilterContext ctx,
AVFrame dst,
const AVFrame src,
int  main_has_alpha,
int  x,
int  y,
int  is_straight,
int  jobnr,
int  nb_jobs 
)
static

Blend image in src to destination buffer dst at position (x, y).

< the amount of overlay to blend on to main

Definition at line 357 of file vf_overlay.c.

Referenced by blend_slice_rgb(), blend_slice_rgb_pm(), blend_slice_rgba(), and blend_slice_rgba_pm().

static av_always_inline void blend_plane ( AVFilterContext ctx,
AVFrame dst,
const AVFrame src,
int  src_w,
int  src_h,
int  dst_w,
int  dst_h,
int  i,
int  hsub,
int  vsub,
int  x,
int  y,
int  main_has_alpha,
int  dst_plane,
int  dst_offset,
int  dst_step,
int  straight,
int  yuv,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 444 of file vf_overlay.c.

Referenced by blend_slice_planar_rgb(), and blend_slice_yuv().

static void alpha_composite ( const AVFrame src,
const AVFrame dst,
int  src_w,
int  src_h,
int  dst_w,
int  dst_h,
int  x,
int  y,
int  jobnr,
int  nb_jobs 
)
inlinestatic

< the amount of overlay to blend on to main

Definition at line 553 of file vf_overlay.c.

Referenced by blend_slice_planar_rgb(), and blend_slice_yuv().

static av_always_inline void blend_slice_yuv ( AVFilterContext ctx,
AVFrame dst,
const AVFrame src,
int  hsub,
int  vsub,
int  main_has_alpha,
int  x,
int  y,
int  is_straight,
int  jobnr,
int  nb_jobs 
)
static
static av_always_inline void blend_slice_planar_rgb ( AVFilterContext ctx,
AVFrame dst,
const AVFrame src,
int  hsub,
int  vsub,
int  main_has_alpha,
int  x,
int  y,
int  is_straight,
int  jobnr,
int  nb_jobs 
)
static
static int blend_slice_yuv420 ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 658 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_yuva420 ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 666 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_yuv422 ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 674 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_yuva422 ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 682 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_yuv444 ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 690 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_yuva444 ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 698 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_gbrp ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 706 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_gbrap ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 714 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_yuv420_pm ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 722 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_yuva420_pm ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 730 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_yuv422_pm ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 738 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_yuva422_pm ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 746 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_yuv444_pm ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 754 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_yuva444_pm ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 762 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_gbrp_pm ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 770 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_gbrap_pm ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 778 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_rgb ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 786 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_rgba ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 794 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_rgb_pm ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 802 of file vf_overlay.c.

Referenced by config_input_main().

static int blend_slice_rgba_pm ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 810 of file vf_overlay.c.

Referenced by config_input_main().

static int config_input_main ( AVFilterLink inlink)
static

Definition at line 818 of file vf_overlay.c.

static int do_blend ( FFFrameSync fs)
static

Definition at line 930 of file vf_overlay.c.

Referenced by init().

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 976 of file vf_overlay.c.

static int activate ( AVFilterContext ctx)
static

Definition at line 984 of file vf_overlay.c.

FRAMESYNC_DEFINE_CLASS ( overlay  ,
OverlayContext  ,
fs   
)

Variable Documentation

const char* const var_names[]
static
Initial value:
= {
"main_w", "W",
"main_h", "H",
"overlay_w", "w",
"overlay_h", "h",
"hsub",
"vsub",
"x",
"y",
"n",
"pos",
"t",
}
#define NULL
Definition: coverity.c:32

Definition at line 48 of file vf_overlay.c.

Referenced by set_expr().

enum AVPixelFormat alpha_pix_fmts[]
static
Initial value:
= {
}
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:97
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:90
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:172
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:91
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:88
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:89
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:173
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:211

Definition at line 155 of file vf_overlay.c.

Referenced by config_input_main(), config_input_overlay(), and query_formats().

const AVOption overlay_options[]
static
Initial value:
= {
{ "x", "set the x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "eof_action", "Action to take when encountering EOF from secondary input ",
OFFSET(fs.opt_eof_action), AV_OPT_TYPE_INT, { .i64 = EOF_ACTION_REPEAT },
EOF_ACTION_REPEAT, EOF_ACTION_PASS, .flags = FLAGS, "eof_action" },
{ "repeat", "Repeat the previous frame.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, "eof_action" },
{ "endall", "End both streams.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, "eof_action" },
{ "pass", "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, .flags = FLAGS, "eof_action" },
{ "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_FRAME}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
{ "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
{ "frame", "eval expressions per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
{ "shortest", "force termination when the shortest input terminates", OFFSET(fs.opt_shortest), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
{ "format", "set output format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=OVERLAY_FORMAT_YUV420}, 0, OVERLAY_FORMAT_NB-1, FLAGS, "format" },
{ "yuv420", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV420}, .flags = FLAGS, .unit = "format" },
{ "yuv422", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV422}, .flags = FLAGS, .unit = "format" },
{ "yuv444", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV444}, .flags = FLAGS, .unit = "format" },
{ "rgb", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_RGB}, .flags = FLAGS, .unit = "format" },
{ "gbrp", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_GBRP}, .flags = FLAGS, .unit = "format" },
{ "auto", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_AUTO}, .flags = FLAGS, .unit = "format" },
{ "repeatlast", "repeat overlay of the last overlay frame", OFFSET(fs.opt_repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "alpha", "alpha format", OFFSET(alpha_format), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "alpha_format" },
{ "straight", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, .flags = FLAGS, .unit = "alpha_format" },
{ "premultiplied", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, .flags = FLAGS, .unit = "alpha_format" },
{ NULL }
}
#define NULL
Definition: coverity.c:32
static const char * format[]
Definition: af_aiir.c:311
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
#define OFFSET(x)
Definition: vf_overlay.c:990
#define FLAGS
Definition: vf_overlay.c:991

Definition at line 993 of file vf_overlay.c.

const AVFilterPad avfilter_vf_overlay_inputs[]
static
Initial value:
= {
{
.name = "main",
.config_props = config_input_main,
},
{
.name = "overlay",
.config_props = config_input_overlay,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int config_input_overlay(AVFilterLink *inlink)
Definition: vf_overlay.c:280
static int config_input_main(AVFilterLink *inlink)
Definition: vf_overlay.c:818

Definition at line 1022 of file vf_overlay.c.

const AVFilterPad avfilter_vf_overlay_outputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_output,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int config_output(AVFilterLink *outlink)
Definition: vf_overlay.c:327

Definition at line 1036 of file vf_overlay.c.

AVFilter ff_vf_overlay
Initial value:
= {
.name = "overlay",
.description = NULL_IF_CONFIG_SMALL("Overlay a video source on top of the input."),
.preinit = overlay_framesync_preinit,
.init = init,
.uninit = uninit,
.priv_size = sizeof(OverlayContext),
.priv_class = &overlay_class,
}
static int activate(AVFilterContext *ctx)
Definition: vf_overlay.c:984
static const AVFilterPad avfilter_vf_overlay_inputs[]
Definition: vf_overlay.c:1022
#define flags(name, subs,...)
Definition: cbs_h2645.c:263
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
static const AVFilterPad avfilter_vf_overlay_outputs[]
Definition: vf_overlay.c:1036
static av_cold int init(AVFilterContext *ctx)
Definition: vf_overlay.c:976
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_overlay.c:81
static int query_formats(AVFilterContext *ctx)
Definition: vf_overlay.c:161
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:133
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_overlay.c:130

Definition at line 1045 of file vf_overlay.c.