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"
Include dependency graph for vf_crop.c:

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_RTCTIME, VAR_RTCSTART,
  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_HSUB, VAR_VSUB, VAR_X, VAR_Y,
  VAR_N, VAR_POS, VAR_T, 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

static int query_formats (AVFilterContext *ctx)
 
static av_cold void uninit (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, AVFrame *frame)
 
 AVFILTER_DEFINE_CLASS (crop)
 

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

Definition at line 308 of file vf_crop.c.

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

Definition at line 307 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_RTCTIME 
VAR_RTCSTART 
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_HSUB 
VAR_VSUB 
VAR_X 
VAR_Y 
VAR_N 
VAR_POS 
VAR_T 
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 int config_input ( AVFilterLink link)
static

Definition at line 151 of file vf_crop.c.

static int config_output ( AVFilterLink link)
static

Definition at line 241 of file vf_crop.c.

static int filter_frame ( AVFilterLink link,
AVFrame frame 
)
static

Definition at line 252 of file vf_crop.c.

static int normalize_double ( int *  n,
double  d 
)
inlinestatic

Definition at line 136 of file vf_crop.c.

Referenced by config_input(), and filter_frame().

static int query_formats ( AVFilterContext ctx)
static

Definition at line 95 of file vf_crop.c.

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 128 of file vf_crop.c.

Variable Documentation

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),
.priv_class = &crop_class,
}
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:117
static const AVFilterPad avfilter_vf_crop_outputs[]
Definition: vf_crop.c:334
static const AVFilterPad avfilter_vf_crop_inputs[]
Definition: vf_crop.c:323
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
static int query_formats(AVFilterContext *ctx)
Definition: vf_crop.c:95
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_crop.c:128
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs

Definition at line 343 of file vf_crop.c.

const AVFilterPad avfilter_vf_crop_inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = filter_frame,
.get_video_buffer = ff_null_get_video_buffer,
.config_props = config_input,
},
{ NULL }
}
static int config_input(AVFilterLink *link)
Definition: vf_crop.c:151
AVFrame * ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
Definition: video.c:35
NULL
Definition: eval.c:55
static int filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: vf_crop.c:252

Definition at line 323 of file vf_crop.c.

const AVFilterPad avfilter_vf_crop_outputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_output,
},
{ NULL }
}
NULL
Definition: eval.c:55
static int config_output(AVFilterLink *link)
Definition: vf_crop.c:241

Definition at line 334 of file vf_crop.c.

const AVOption crop_options[]
static
Initial value:
= {
{ "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 },
{ "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 },
{ "keep_aspect", "keep aspect ratio", OFFSET(keep_aspect), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
{NULL}
}
#define FLAGS
Definition: vf_crop.c:308
#define OFFSET(x)
Definition: vf_crop.c:307
NULL
Definition: eval.c:55

Definition at line 310 of file vf_crop.c.

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: eval.c:55

Definition at line 42 of file vf_crop.c.

Referenced by config_input().