FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
vf_cropdetect.c File Reference
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/motion_vector.h"
#include "libavutil/qsort.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "edge_common.h"

Go to the source code of this file.

Data Structures

struct  CropDetectContext
 

Macros

#define SET_META(key, value)   av_dict_set_int(metadata, key, value, 0)
 
#define FIND(DST, FROM, NOEND, INC, STEP0, STEP1, LEN)
 
#define FIND_EDGE(DST, FROM, NOEND, INC, STEP0, STEP1, LEN)
 
#define OFFSET(x)   offsetof(CropDetectContext, x)
 
#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 
#define TFLAGS   AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
 

Enumerations

enum  CropMode { MODE_BLACK, MODE_MV_EDGES, MODE_NB }
 

Functions

static int comp (const int *a, const int *b)
 
static int checkline (void *ctx, const unsigned char *src, int stride, int len, int bpp)
 
static int checkline_edge (void *ctx, const unsigned char *src, int stride, int len, int bpp)
 
static av_cold int init (AVFilterContext *ctx)
 
static av_cold void uninit (AVFilterContext *ctx)
 
static int config_input (AVFilterLink *inlink)
 
static int filter_frame (AVFilterLink *inlink, AVFrame *frame)
 
static int process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
 
 AVFILTER_DEFINE_CLASS (cropdetect)
 

Variables

static enum AVPixelFormat pix_fmts []
 
static const AVOption cropdetect_options []
 
static const AVFilterPad avfilter_vf_cropdetect_inputs []
 
static const AVFilterPad avfilter_vf_cropdetect_outputs []
 
const AVFilter ff_vf_cropdetect
 

Detailed Description

border detection filter Ported from MPlayer libmpcodecs/vf_cropdetect.c.

Definition in file vf_cropdetect.c.

Macro Definition Documentation

◆ SET_META

#define SET_META (   key,
  value 
)    av_dict_set_int(metadata, key, value, 0)

Definition at line 241 of file vf_cropdetect.c.

◆ FIND

#define FIND (   DST,
  FROM,
  NOEND,
  INC,
  STEP0,
  STEP1,
  LEN 
)
Value:
outliers = 0;\
for (last_y = y = FROM; NOEND; y = y INC) {\
if (checkline(ctx, frame->data[0] + STEP0 * y, STEP1, LEN, bpp) > limit_upscaled) {\
if (++outliers > s->max_outliers) { \
DST = last_y;\
break;\
}\
} else\
last_y = y INC;\
}

◆ FIND_EDGE

#define FIND_EDGE (   DST,
  FROM,
  NOEND,
  INC,
  STEP0,
  STEP1,
  LEN 
)
Value:
for (last_y = y = FROM; NOEND; y = y INC) { \
if (checkline_edge(ctx, tmpbuf + STEP0 * y, STEP1, LEN, bpp)) { \
if (last_y INC == y) { \
DST = y; \
break; \
} else \
last_y = y; \
} \
} \
if (!(NOEND)) { \
DST = y -(INC); \
}

◆ OFFSET

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

Definition at line 467 of file vf_cropdetect.c.

◆ FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 468 of file vf_cropdetect.c.

◆ TFLAGS

#define TFLAGS   AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 469 of file vf_cropdetect.c.

Enumeration Type Documentation

◆ CropMode

enum CropMode
Enumerator
MODE_BLACK 
MODE_MV_EDGES 
MODE_NB 

Definition at line 79 of file vf_cropdetect.c.

Function Documentation

◆ comp()

static int comp ( const int *  a,
const int *  b 
)
static

Definition at line 85 of file vf_cropdetect.c.

Referenced by filter_frame().

◆ checkline()

static int checkline ( void *  ctx,
const unsigned char *  src,
int  stride,
int  len,
int  bpp 
)
static

Definition at line 90 of file vf_cropdetect.c.

◆ checkline_edge()

static int checkline_edge ( void *  ctx,
const unsigned char *  src,
int  stride,
int  len,
int  bpp 
)
static

Definition at line 145 of file vf_cropdetect.c.

◆ init()

static av_cold int init ( AVFilterContext *  ctx)
static

Definition at line 175 of file vf_cropdetect.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext *  ctx)
static

Definition at line 189 of file vf_cropdetect.c.

◆ config_input()

static int config_input ( AVFilterLink *  inlink)
static

Definition at line 203 of file vf_cropdetect.c.

◆ filter_frame()

static int filter_frame ( AVFilterLink *  inlink,
AVFrame *  frame 
)
static

Definition at line 244 of file vf_cropdetect.c.

◆ 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 446 of file vf_cropdetect.c.

◆ AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS ( cropdetect  )

Variable Documentation

◆ pix_fmts

enum AVPixelFormat pix_fmts[]
static
Initial value:
= {
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUV411P, AV_PIX_FMT_GRAY8,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUV420P9 , AV_PIX_FMT_YUV422P9 , AV_PIX_FMT_YUV444P9,
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_NV12, AV_PIX_FMT_NV21,
AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
AV_PIX_FMT_NONE
}

Definition at line 62 of file vf_cropdetect.c.

◆ cropdetect_options

const AVOption cropdetect_options[]
static
Initial value:
= {
{ "limit", "Threshold below which the pixel is considered black", OFFSET(limit), AV_OPT_TYPE_FLOAT, { .dbl = 24.0/255 }, 0, 65535, TFLAGS },
{ "round", "Value by which the width/height should be divisible", OFFSET(round), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, INT_MAX, FLAGS },
{ "reset", "Recalculate the crop area after this many frames", OFFSET(reset_count), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
{ "skip", "Number of initial frames to skip", OFFSET(skip), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, INT_MAX, FLAGS },
{ "reset_count", "Recalculate the crop area after this many frames",OFFSET(reset_count),AV_OPT_TYPE_INT,{ .i64 = 0 }, 0, INT_MAX, FLAGS },
{ "max_outliers", "Threshold count of outliers", OFFSET(max_outliers),AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
{ "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_BLACK}, 0, MODE_NB-1, FLAGS, "mode" },
{ "black", "detect black pixels surrounding the video", 0, AV_OPT_TYPE_CONST, {.i64=MODE_BLACK}, INT_MIN, INT_MAX, FLAGS, "mode" },
{ "mvedges", "detect motion and edged surrounding the video", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MV_EDGES}, INT_MIN, INT_MAX, FLAGS, "mode" },
{ "high", "Set high threshold for edge detection", OFFSET(high), AV_OPT_TYPE_FLOAT, {.dbl=25/255.}, 0, 1, FLAGS },
{ "low", "Set low threshold for edge detection", OFFSET(low), AV_OPT_TYPE_FLOAT, {.dbl=15/255.}, 0, 1, FLAGS },
{ "mv_threshold", "motion vector threshold when estimating video window size", OFFSET(mv_threshold), AV_OPT_TYPE_INT, {.i64=8}, 0, 100, FLAGS},
{ NULL }
}

Definition at line 471 of file vf_cropdetect.c.

◆ avfilter_vf_cropdetect_inputs

const AVFilterPad avfilter_vf_cropdetect_inputs[]
static
Initial value:
= {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
.filter_frame = filter_frame,
},
}

Definition at line 489 of file vf_cropdetect.c.

◆ avfilter_vf_cropdetect_outputs

const AVFilterPad avfilter_vf_cropdetect_outputs[]
static
Initial value:
= {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO
},
}

Definition at line 498 of file vf_cropdetect.c.

◆ ff_vf_cropdetect

const AVFilter ff_vf_cropdetect
Initial value:
= {
.name = "cropdetect",
.description = NULL_IF_CONFIG_SMALL("Auto-detect crop size."),
.priv_size = sizeof(CropDetectContext),
.priv_class = &cropdetect_class,
.init = init,
.uninit = uninit,
FILTER_INPUTS(avfilter_vf_cropdetect_inputs),
FILTER_OUTPUTS(avfilter_vf_cropdetect_outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_METADATA_ONLY,
.process_command = process_command,
}

Definition at line 505 of file vf_cropdetect.c.

init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_cropdetect.c:175
FILTER_PIXFMTS_ARRAY
#define FILTER_PIXFMTS_ARRAY(array)
Definition: internal.h:174
LEN
#define LEN
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:459
AV_PIX_FMT_BGR24
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
AV_PIX_FMT_BGRA
@ AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:95
AV_PIX_FMT_YUV440P
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
MODE_BLACK
@ MODE_BLACK
Definition: vf_cropdetect.c:80
checkline
static int checkline(void *ctx, const unsigned char *src, int stride, int len, int bpp)
Definition: vf_cropdetect.c:90
AV_PIX_FMT_YUV422P9
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:457
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:462
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:471
AV_PIX_FMT_YUVJ422P
@ AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
CropDetectContext
Definition: vf_cropdetect.c:38
s
#define s(width, name)
Definition: cbs_vp9.c:256
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:472
AV_PIX_FMT_YUV420P9
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:456
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:470
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:194
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
AV_PIX_FMT_YUVJ444P
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_cropdetect.c:244
NULL
#define NULL
Definition: coverity.c:32
FLAGS
#define FLAGS
Definition: vf_cropdetect.c:468
AV_PIX_FMT_YUVJ420P
@ AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:460
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
TFLAGS
#define TFLAGS
Definition: vf_cropdetect.c:469
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:115
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: vf_cropdetect.c:62
AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:464
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:466
OFFSET
#define OFFSET(x)
Definition: vf_cropdetect.c:467
MODE_MV_EDGES
@ MODE_MV_EDGES
Definition: vf_cropdetect.c:81
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_cropdetect.c:203
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:142
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
round
static av_always_inline av_const double round(double x)
Definition: libm.h:444
MODE_NB
@ MODE_NB
Definition: vf_cropdetect.c:82
AV_PIX_FMT_NV21
@ AV_PIX_FMT_NV21
as above, but U and V bytes are swapped
Definition: pixfmt.h:90
AV_PIX_FMT_YUV444P9
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:458
limit
static double limit(double x)
Definition: vf_pseudocolor.c:130
AV_PIX_FMT_NV12
@ AV_PIX_FMT_NV12
planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (firs...
Definition: pixfmt.h:89
frame
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 the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
AV_PIX_FMT_YUV420P12
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:463
AV_PIX_FMT_YUV422P14
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:468
mode
mode
Definition: ebur128.h:83
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_cropdetect.c:446
AVFILTER_FLAG_METADATA_ONLY
#define AVFILTER_FLAG_METADATA_ONLY
The filter is a "metadata" filter - it does not modify the frame data in any way.
Definition: avfilter.h:133
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
checkline_edge
static int checkline_edge(void *ctx, const unsigned char *src, int stride, int len, int bpp)
Definition: vf_cropdetect.c:145
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
avfilter_vf_cropdetect_inputs
static const AVFilterPad avfilter_vf_cropdetect_inputs[]
Definition: vf_cropdetect.c:489
avfilter_vf_cropdetect_outputs
static const AVFilterPad avfilter_vf_cropdetect_outputs[]
Definition: vf_cropdetect.c:498
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:195
AV_PIX_FMT_YUV411P
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
AV_PIX_FMT_YUV444P14
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:469
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_cropdetect.c:189
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
skip
static void BS_FUNC() skip(BSCTX *bc, unsigned int n)
Skip n bits in the buffer.
Definition: bitstream_template.h:375
AV_PIX_FMT_YUV420P14
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:467
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