libavfilter/vf_select.c File Reference

filter for selecting which frame passes in the filterchain More...

#include "libavutil/eval.h"
#include "libavutil/fifo.h"
#include "libavutil/internal.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	SelectContext
Defines
#define	FIFO_SIZE   8
#define	INTERLACE_TYPE_P   0
#define	INTERLACE_TYPE_T   1
#define	INTERLACE_TYPE_B   2
#define	D2TS(d)   (isnan(d) ? AV_NOPTS_VALUE : (int64_t)(d))
#define	TS2D(ts)   ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts))
Enumerations
enum	var_name {   VAR_B1, VAR_B2, VAR_S1, VAR_S2,   VAR_T1, VAR_T2, VAR_NB, VAR_N,   VAR_T, VAR_S, VAR_VARS_NB, VAR_FRAME_RATE,   VAR_INTERLACED, VAR_N, VAR_NB_CONSUMED_SAMPLES, VAR_NB_SAMPLES,   VAR_POS, VAR_PREV_INPTS, VAR_PREV_INT, VAR_PREV_OUTPTS,   VAR_PREV_OUTT, VAR_PTS, VAR_SAMPLE_RATE, VAR_STARTPTS,   VAR_STARTT, VAR_T, VAR_TB, VAR_VARS_NB,   VAR_AVTB, VAR_INTB, VAR_SR, VAR_VARS_NB,   VAR_W, VAR_H, VAR_CW, VAR_CH,   VAR_HSUB, VAR_VSUB, VARS_NB, VAR_IN_W,   VAR_IW, VAR_IN_H, VAR_IH, VAR_OUT_W,   VAR_OW, VAR_OUT_H, VAR_OH, VAR_A,   VAR_SAR, VAR_DAR, VAR_HSUB, VAR_VSUB,   VAR_X, VAR_Y, VAR_N, VAR_POS,   VAR_T, VAR_VARS_NB, VAR_DAR, VAR_HSUB,   VAR_VSUB, VAR_LINE_H, VAR_LH, VAR_MAIN_H,   VAR_h, VAR_H, VAR_MAIN_W, VAR_w,   VAR_W, VAR_MAX_GLYPH_A, VAR_ASCENT, VAR_MAX_GLYPH_D,   VAR_DESCENT, VAR_MAX_GLYPH_H, VAR_MAX_GLYPH_W, VAR_N,   VAR_SAR, VAR_T, VAR_TEXT_H, VAR_TH,   VAR_TEXT_W, VAR_TW, VAR_X, VAR_Y,   VAR_VARS_NB, VAR_N, VAR_PTS, VAR_R,   VAR_T, VAR_TB, VAR_NB, VAR_W,   VAR_H, VAR_VAL, VAR_MAXVAL, VAR_MINVAL,   VAR_NEGVAL, VAR_CLIPVAL, VAR_VARS_NB, VAR_MAIN_W,   VAR_MW, VAR_MAIN_H, VAR_MH, VAR_OVERLAY_W,   VAR_OW, VAR_OVERLAY_H, VAR_OH, VAR_VARS_NB,   VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH,   VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH,   VAR_X, VAR_Y, VAR_A, VAR_SAR,   VAR_DAR, VAR_HSUB, VAR_VSUB, VARS_NB,   VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH,   VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH,   VAR_A, VAR_SAR, VAR_DAR, VAR_HSUB,   VAR_VSUB, VARS_NB, VAR_TB, VAR_PTS,   VAR_START_PTS, VAR_PREV_PTS, VAR_PREV_SELECTED_PTS, VAR_T,   VAR_START_T, VAR_PREV_T, VAR_PREV_SELECTED_T, VAR_PICT_TYPE,   VAR_PICT_TYPE_I, VAR_PICT_TYPE_P, VAR_PICT_TYPE_B, VAR_PICT_TYPE_S,   VAR_PICT_TYPE_SI, VAR_PICT_TYPE_SP, VAR_PICT_TYPE_BI, VAR_INTERLACE_TYPE,   VAR_INTERLACE_TYPE_P, VAR_INTERLACE_TYPE_T, VAR_INTERLACE_TYPE_B, VAR_N,   VAR_SELECTED_N, VAR_PREV_SELECTED_N, VAR_KEY, VAR_POS,   VAR_SCENE, VAR_VARS_NB, VAR_X, VAR_Y,   VAR_W, VAR_H, VAR_TIME, VAR_SPEED,   VAR_TEMPO, VAR_ORDER, VAR_PATTERN, VAR_ROW,   VAR_VARS_NB }
Functions
static av_cold int	init (AVFilterContext *ctx, const char *args)
static int	config_input (AVFilterLink *inlink)
static int	select_frame (AVFilterContext *ctx, AVFilterBufferRef *picref)
static int	start_frame (AVFilterLink *inlink, AVFilterBufferRef *picref)
static int	draw_slice (AVFilterLink *inlink, int y, int h, int slice_dir)
static int	end_frame (AVFilterLink *inlink)
static int	request_frame (AVFilterLink *outlink)
static int	poll_frame (AVFilterLink *outlink)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
Variables
static const char *const	var_names []
AVFilter	avfilter_vf_select

---

Detailed Description

filter for selecting which frame passes in the filterchain

Definition in file vf_select.c.

---

Define Documentation

#define D2TS

(

d

)

(isnan(d) ? AV_NOPTS_VALUE : (int64_t)(d))

Definition at line 232 of file vf_select.c.

#define FIFO_SIZE   8

Definition at line 116 of file vf_select.c.

Referenced by init().

#define INTERLACE_TYPE_B   2

Definition at line 160 of file vf_select.c.

Referenced by config_input(), and select_frame().

#define INTERLACE_TYPE_P   0

Definition at line 158 of file vf_select.c.

Referenced by config_input(), and select_frame().

#define INTERLACE_TYPE_T   1

Definition at line 159 of file vf_select.c.

Referenced by config_input(), and select_frame().

#define TS2D

(

ts

)

((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts))

Definition at line 233 of file vf_select.c.

---

Enumeration Type Documentation

enum var_name

Enumerator:

VAR_B1
VAR_B2
VAR_S1
VAR_S2
VAR_T1
VAR_T2
VAR_NB
VAR_N
VAR_T
VAR_S
VAR_VARS_NB
VAR_FRAME_RATE
VAR_INTERLACED
VAR_N
VAR_NB_CONSUMED_SAMPLES
VAR_NB_SAMPLES
VAR_POS
VAR_PREV_INPTS
VAR_PREV_INT
VAR_PREV_OUTPTS
VAR_PREV_OUTT
VAR_PTS
VAR_SAMPLE_RATE
VAR_STARTPTS
VAR_STARTT
VAR_T
VAR_TB
VAR_VARS_NB
VAR_AVTB
VAR_INTB
VAR_SR
VAR_VARS_NB
VAR_W
VAR_H
VAR_CW
VAR_CH
VAR_HSUB
VAR_VSUB
VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_X
VAR_Y
VAR_N
VAR_POS
VAR_T
VAR_VARS_NB
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_LINE_H
VAR_LH
VAR_MAIN_H
VAR_h
VAR_H
VAR_MAIN_W
VAR_w
VAR_W
VAR_MAX_GLYPH_A
VAR_ASCENT
VAR_MAX_GLYPH_D
VAR_DESCENT
VAR_MAX_GLYPH_H
VAR_MAX_GLYPH_W
VAR_N
VAR_SAR
VAR_T
VAR_TEXT_H
VAR_TH
VAR_TEXT_W
VAR_TW
VAR_X
VAR_Y
VAR_VARS_NB
VAR_N
VAR_PTS
VAR_R
VAR_T
VAR_TB
VAR_NB
VAR_W
VAR_H
VAR_VAL
VAR_MAXVAL
VAR_MINVAL
VAR_NEGVAL
VAR_CLIPVAL
VAR_VARS_NB
VAR_MAIN_W
VAR_MW
VAR_MAIN_H
VAR_MH
VAR_OVERLAY_W
VAR_OW
VAR_OVERLAY_H
VAR_OH
VAR_VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_X
VAR_Y
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VARS_NB
VAR_TB
VAR_PTS
VAR_START_PTS
VAR_PREV_PTS
VAR_PREV_SELECTED_PTS
VAR_T
VAR_START_T
VAR_PREV_T
VAR_PREV_SELECTED_T
VAR_PICT_TYPE
VAR_PICT_TYPE_I
VAR_PICT_TYPE_P
VAR_PICT_TYPE_B
VAR_PICT_TYPE_S
VAR_PICT_TYPE_SI
VAR_PICT_TYPE_SP
VAR_PICT_TYPE_BI
VAR_INTERLACE_TYPE
VAR_INTERLACE_TYPE_P
VAR_INTERLACE_TYPE_T
VAR_INTERLACE_TYPE_B
VAR_N
VAR_SELECTED_N
VAR_PREV_SELECTED_N
VAR_KEY
VAR_POS
VAR_SCENE
VAR_VARS_NB
VAR_X
VAR_Y
VAR_W
VAR_H
VAR_TIME
VAR_SPEED
VAR_TEMPO
VAR_ORDER
VAR_PATTERN
VAR_ROW
VAR_VARS_NB

Definition at line 77 of file vf_select.c.

---

Function Documentation

static int config_input

(

AVFilterLink *

inlink

)

[static]

Definition at line 162 of file vf_select.c.

static int draw_slice	(	AVFilterLink *	inlink,
		int	y,
		int	h,
		int	slice_dir
	)			[static]

Definition at line 310 of file vf_select.c.

static int end_frame

(

AVFilterLink *

inlink

)

[static]

Definition at line 319 of file vf_select.c.

static av_cold int init	(	AVFilterContext *	ctx,
		const char *	args
	)			[static]

Definition at line 133 of file vf_select.c.

static int poll_frame

(

AVFilterLink *

outlink

)

[static]

Definition at line 359 of file vf_select.c.

static int query_formats

(

AVFilterContext *

ctx

)

[static]

Definition at line 404 of file vf_select.c.

static int request_frame

(

AVFilterLink *

outlink

)

[static]

Definition at line 331 of file vf_select.c.

static int select_frame	(	AVFilterContext *	ctx,
		AVFilterBufferRef *	picref
	)			[static]

Definition at line 235 of file vf_select.c.

Referenced by start_frame().

static int start_frame	(	AVFilterLink *	inlink,
		AVFilterBufferRef *	picref
	)			[static]

Definition at line 284 of file vf_select.c.

static av_cold void uninit

(

AVFilterContext *

ctx

)

[static]

Definition at line 381 of file vf_select.c.

---

Variable Documentation

AVFilter avfilter_vf_select

Initial value:

 {
    .name      = "select",
    .description = NULL_IF_CONFIG_SMALL("Select frames to pass in output."),
    .init      = init,
    .uninit    = uninit,
    .query_formats = query_formats,

    .priv_size = sizeof(SelectContext),

    .inputs    = (const AVFilterPad[]) {{ .name             = "default",
                                          .type             = AVMEDIA_TYPE_VIDEO,
                                          .get_video_buffer = ff_null_get_video_buffer,
                                          .min_perms        = AV_PERM_PRESERVE,
                                          .config_props     = config_input,
                                          .start_frame      = start_frame,
                                          .draw_slice       = draw_slice,
                                          .end_frame        = end_frame },
                                        { .name = NULL }},
    .outputs   = (const AVFilterPad[]) {{ .name             = "default",
                                          .type             = AVMEDIA_TYPE_VIDEO,
                                          .poll_frame       = poll_frame,
                                          .request_frame    = request_frame, },
                                        { .name = NULL}},
}

Definition at line 420 of file vf_select.c.

const char* const var_names[] [static]

Definition at line 38 of file vf_select.c.