vf_crop.c File Reference

video crop filter More...

#include <stdio.h>
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "libavutil/eval.h"
#include "libavutil/avstring.h"
#include "libavutil/internal.h"
#include "libavutil/libm.h"
#include "libavutil/imgutils.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"

Go to the source code of this file.

Data Structures
struct	CropContext

Macros
#define	OFFSET(x)   offsetof(CropContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

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_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_CONSUMED_SAMPLES_N, VAR_SAMPLES_N, VAR_SAMPLE_RATE, VAR_N,   VAR_SELECTED_N, VAR_PREV_SELECTED_N, VAR_KEY, VAR_POS,   VAR_SCENE, 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_X, VAR_Y, VAR_W,   VAR_H, VAR_TIME, VAR_SPEED, VAR_TEMPO,   VAR_ORDER, VAR_PATTERN, VAR_ROW, VAR_VARS_NB }

Functions
	AVFILTER_DEFINE_CLASS (crop)
static av_cold int	init (AVFilterContext *ctx, const char *args)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	normalize_double (int *n, double d)
static int	config_input (AVFilterLink *link)
static int	config_output (AVFilterLink *link)
static int	filter_frame (AVFilterLink *link, AVFilterBufferRef *frame)

Variables
static const char *const	var_names []
static const AVOption	crop_options []
static const AVFilterPad	avfilter_vf_crop_inputs []
static const AVFilterPad	avfilter_vf_crop_outputs []
AVFilter	avfilter_vf_crop

Detailed Description

video crop filter

Definition in file vf_crop.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(CropContext, x)

Definition at line 95 of file vf_crop.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 96 of file vf_crop.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_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_CONSUMED_SAMPLES_N
VAR_SAMPLES_N
VAR_SAMPLE_RATE
VAR_N
VAR_SELECTED_N
VAR_PREV_SELECTED_N
VAR_KEY
VAR_POS
VAR_SCENE
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_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 60 of file vf_crop.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

crop

)

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

static

Definition at line 111 of file vf_crop.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 122 of file vf_crop.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 131 of file vf_crop.c.

static int normalize_double ( int *  n, double  d  )

inlinestatic

Definition at line 164 of file vf_crop.c.

Referenced by config_input(), and filter_frame().

static int config_input ( AVFilterLink *  link )

static

Definition at line 179 of file vf_crop.c.

static int config_output ( AVFilterLink *  link )

static

Definition at line 269 of file vf_crop.c.

static int filter_frame ( AVFilterLink *  link, AVFilterBufferRef *  frame  )

static

Definition at line 280 of file vf_crop.c.

Variable Documentation

const char* const var_names[]

static

Initial value:

= {
    "in_w", "iw",   
    "in_h", "ih",   
    "out_w", "ow",  
    "out_h", "oh",  
    "a",
    "sar",
    "dar",
    "hsub",
    "vsub",
    "x",
    "y",
    "n",            
    "pos",          
    "t",            
    NULL
}

Definition at line 42 of file vf_crop.c.

Referenced by config_input().

const AVOption crop_options[]

static

Initial value:

= {
    { "x",           "set the x crop area expression",       OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "(in_w-out_w)/2"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "y",           "set the y crop area expression",       OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "(in_h-out_h)/2"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "out_w",       "set the width crop area expression",   OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "w",           "set the width crop area expression",   OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "out_h",       "set the height crop area expression",  OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "h",           "set the height crop area expression",  OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "keep_aspect", "force packed RGB in input and output", OFFSET(keep_aspect), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
    {NULL}
}

Definition at line 98 of file vf_crop.c.

const AVFilterPad avfilter_vf_crop_inputs[]

static

Initial value:

= {
    {
        .name             = "default",
        .type             = AVMEDIA_TYPE_VIDEO,
        .filter_frame     = filter_frame,
        .get_video_buffer = ff_null_get_video_buffer,
        .config_props     = config_input,
    },
    { NULL }
}

Definition at line 334 of file vf_crop.c.

const AVFilterPad avfilter_vf_crop_outputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_output,
    },
    { NULL }
}

Definition at line 345 of file vf_crop.c.

AVFilter avfilter_vf_crop

Initial value:

= {
    .name      = "crop",
    .description = NULL_IF_CONFIG_SMALL("Crop the input video to width:height:x:y."),

    .priv_size = sizeof(CropContext),

    .query_formats = query_formats,
    .init          = init,
    .uninit        = uninit,

    .inputs    = avfilter_vf_crop_inputs,
    .outputs   = avfilter_vf_crop_outputs,
    .priv_class = &crop_class,
}

Definition at line 354 of file vf_crop.c.