vf_fps.c File Reference
a filter enforcing given constant framerate More...
#include <float.h>#include <stdint.h>#include "libavutil/avassert.h"#include "libavutil/eval.h"#include "libavutil/mathematics.h"#include "libavutil/opt.h"#include "avfilter.h"#include "ccfifo.h"#include "filters.h"#include "video.h"Go to the source code of this file.
Data Structures | |
| struct | FPSContext |
Macros | |
| #define | OFFSET(x) |
| #define | V AV_OPT_FLAG_VIDEO_PARAM |
| #define | F AV_OPT_FLAG_FILTERING_PARAM |
Enumerations | |
| enum | EOFAction { EOF_ACTION_ROUND , EOF_ACTION_PASS , EOF_ACTION_NB } |
| enum | var_name { VAR_SOURCE_FPS , VAR_FPS_NTSC , VAR_FPS_PAL , VAR_FPS_FILM , VAR_FPS_NTSC_FILM , VARS_NB } |
Functions | |
| AVFILTER_DEFINE_CLASS (fps) | |
| static av_cold int | init (AVFilterContext *ctx) |
| static AVFrame * | shift_frame (AVFilterContext *ctx, FPSContext *s) |
| static av_cold void | uninit (AVFilterContext *ctx) |
| static int | config_props (AVFilterLink *outlink) |
| static int | read_frame (AVFilterContext *ctx, FPSContext *s, AVFilterLink *inlink, AVFilterLink *outlink) |
| static int | write_frame (AVFilterContext *ctx, FPSContext *s, AVFilterLink *outlink, int *again) |
| static void | update_eof_pts (AVFilterContext *ctx, FPSContext *s, AVFilterLink *inlink, AVFilterLink *outlink, int64_t status_pts) |
| static int | activate (AVFilterContext *ctx) |
Variables | |
| static const char *const | var_names [] |
| static const double | ntsc_fps = 30000.0 / 1001.0 |
| static const double | pal_fps = 25.0 |
| static const double | film_fps = 24.0 |
| static const double | ntsc_film_fps = 24000.0 / 1001.0 |
| static const AVOption | fps_options [] |
| static const AVFilterPad | avfilter_vf_fps_outputs [] |
| const FFFilter | ff_vf_fps |
Detailed Description
a filter enforcing given constant framerate
Definition in file vf_fps.c.
Macro Definition Documentation
◆ OFFSET
| #define OFFSET | ( | x | ) |
Value:
offsetof(FPSContext, x)
Definition vf_fps.c:70
◆ V
| #define V AV_OPT_FLAG_VIDEO_PARAM |
◆ F
| #define F AV_OPT_FLAG_FILTERING_PARAM |
Enumeration Type Documentation
◆ EOFAction
| enum EOFAction |
◆ var_name
| enum var_name |
Function Documentation
◆ AVFILTER_DEFINE_CLASS()
| AVFILTER_DEFINE_CLASS | ( | fps | ) |
◆ init()
|
static |
◆ shift_frame()
|
static |
Definition at line 132 of file vf_fps.c.
Referenced by uninit(), and write_frame().
◆ uninit()
|
static |
◆ config_props()
|
static |
◆ read_frame()
|
static |
Definition at line 230 of file vf_fps.c.
Referenced by activate().
◆ write_frame()
|
static |
Definition at line 264 of file vf_fps.c.
Referenced by activate().
◆ update_eof_pts()
|
static |
Definition at line 317 of file vf_fps.c.
Referenced by activate().
◆ activate()
|
static |
Variable Documentation
◆ var_names
|
static |
Initial value:
= {
"source_fps",
"ntsc",
"pal",
"film",
"ntsc_film",
}
◆ ntsc_fps
|
static |
Definition at line 65 of file vf_fps.c.
Referenced by config_props().
◆ pal_fps
|
static |
Definition at line 66 of file vf_fps.c.
Referenced by config_props().
◆ film_fps
|
static |
Definition at line 67 of file vf_fps.c.
Referenced by config_props().
◆ ntsc_film_fps
|
static |
Definition at line 68 of file vf_fps.c.
Referenced by config_props().
◆ fps_options
|
static |
Initial value:
= {
{ "fps", "A string describing desired output framerate", OFFSET(framerate), AV_OPT_TYPE_STRING, { .str = "25" }, 0, 0, V|F },
{ "start_time", "Assume the first PTS should be this value.", OFFSET(start_time), AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX}, -DBL_MAX, DBL_MAX, V|F },
{ "round", "set rounding method for timestamps", OFFSET(rounding), AV_OPT_TYPE_INT, { .i64 = AV_ROUND_NEAR_INF }, 0, 5, V|F, .unit = "round" },
{ "zero", "round towards 0", 0, AV_OPT_TYPE_CONST, { .i64 = AV_ROUND_ZERO }, 0, 0, V|F, .unit = "round" },
{ "inf", "round away from 0", 0, AV_OPT_TYPE_CONST, { .i64 = AV_ROUND_INF }, 0, 0, V|F, .unit = "round" },
{ "down", "round towards -infty", 0, AV_OPT_TYPE_CONST, { .i64 = AV_ROUND_DOWN }, 0, 0, V|F, .unit = "round" },
{ "up", "round towards +infty", 0, AV_OPT_TYPE_CONST, { .i64 = AV_ROUND_UP }, 0, 0, V|F, .unit = "round" },
{ "near", "round to nearest", 0, AV_OPT_TYPE_CONST, { .i64 = AV_ROUND_NEAR_INF }, 0, 0, V|F, .unit = "round" },
{ "eof_action", "action performed for last frame", OFFSET(eof_action), AV_OPT_TYPE_INT, { .i64 = EOF_ACTION_ROUND }, 0, EOF_ACTION_NB-1, V|F, .unit = "eof_action" },
{ "round", "round similar to other frames", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ROUND }, 0, 0, V|F, .unit = "eof_action" },
{ "pass", "pass through last frame", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, 0, 0, V|F, .unit = "eof_action" },
{ NULL }
}
#define F(x)
@ AV_OPT_TYPE_STRING
Underlying C type is a uint8_t* that is either NULL or points to a C string allocated with the av_mal...
Definition opt.h:275
◆ avfilter_vf_fps_outputs
|
static |
Initial value:
◆ ff_vf_fps
| const FFFilter ff_vf_fps |
Initial value:
= {
.p.name = "fps",
.p.description = NULL_IF_CONFIG_SMALL("Force constant framerate."),
.p.priv_class = &fps_class,
.p.flags = AVFILTER_FLAG_METADATA_ONLY,
.init = init,
.uninit = uninit,
.priv_size = sizeof(FPSContext),
}
#define AVFILTER_FLAG_METADATA_ONLY
The filter is a "metadata" filter - it does not modify the frame data in any way.
Definition avfilter.h:182
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition internal.h:88
const AVFilterPad ff_video_default_filterpad[1]
An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_VIDEO.
Definition video.c:37
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