vf_tiltandshift.c File Reference

#include <string.h>
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "filters.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	TiltandshiftContext

Macros
#define	OFFSET(x)   offsetof(TiltandshiftContext, x)
#define	V   AV_OPT_FLAG_VIDEO_PARAM

Enumerations
enum	PaddingOption { TILT_NONE, TILT_FRAME, TILT_BLACK, TILT_OPT_MAX }

Functions
static int	list_add_frame (TiltandshiftContext *s, AVFrame *frame)
static void	list_remove_head (TiltandshiftContext *s)
static av_cold void	uninit (AVFilterContext *ctx)
static int	config_props (AVFilterLink *outlink)
static void	copy_column (AVFilterLink *outlink, uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], int ncol, int tilt)
static int	output_frame (AVFilterLink *outlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *frame)
static int	request_frame (AVFilterLink *outlink)
	AVFILTER_DEFINE_CLASS (tiltandshift)

Variables
static enum AVPixelFormat	pix_fmts []
static const AVOption	tiltandshift_options []
static const AVFilterPad	tiltandshift_inputs []
static const AVFilterPad	tiltandshift_outputs []
const AVFilter	ff_vf_tiltandshift

Detailed Description

Simple time and space inverter.

Definition in file vf_tiltandshift.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(TiltandshiftContext, x)

Definition at line 308 of file vf_tiltandshift.c.

V

#define V   AV_OPT_FLAG_VIDEO_PARAM

Definition at line 309 of file vf_tiltandshift.c.

Enumeration Type Documentation

PaddingOption

enum PaddingOption

Enumerator
TILT_NONE
TILT_FRAME
TILT_BLACK
TILT_OPT_MAX

Definition at line 37 of file vf_tiltandshift.c.

Function Documentation

list_add_frame()

static int list_add_frame ( TiltandshiftContext *  s, AVFrame *  frame  )

static

Definition at line 74 of file vf_tiltandshift.c.

Referenced by filter_frame().

list_remove_head()

static void list_remove_head ( TiltandshiftContext *  s )

static

Definition at line 88 of file vf_tiltandshift.c.

Referenced by output_frame(), and uninit().

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 106 of file vf_tiltandshift.c.

config_props()

static int config_props ( AVFilterLink *  outlink )

static

Definition at line 114 of file vf_tiltandshift.c.

copy_column()

static void copy_column ( AVFilterLink *  outlink, uint8_t *  dst_data[4], int  dst_linesizes[4], const uint8_t *  src_data[4], const int  src_linesizes[4], int  ncol, int  tilt  )

static

Definition at line 167 of file vf_tiltandshift.c.

Referenced by output_frame().

output_frame()

static int output_frame ( AVFilterLink *  outlink )

static

Definition at line 190 of file vf_tiltandshift.c.

Referenced by filter_frame(), and request_frame().

filter_frame()

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

static

Definition at line 255 of file vf_tiltandshift.c.

request_frame()

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 276 of file vf_tiltandshift.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

tiltandshift

)

Variable Documentation

pix_fmts

enum AVPixelFormat pix_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
    AV_PIX_FMT_YUV410P,
    AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
    AV_PIX_FMT_YUVJ440P,
    AV_PIX_FMT_NONE
}

Definition at line 98 of file vf_tiltandshift.c.

tiltandshift_options

const AVOption tiltandshift_options[]

static

Initial value:

= {
    { "tilt", "Tilt the video horizontally while shifting", OFFSET(tilt), AV_OPT_TYPE_INT,
        { .i64 = 1 }, 0, 1, .flags = V, .unit = "tilt" },
 
    { "start", "Action at the start of input", OFFSET(start), AV_OPT_TYPE_INT,
        { .i64 = TILT_NONE }, 0, TILT_OPT_MAX, .flags = V, .unit = "start" },
    { "none", "Start immediately (default)", 0, AV_OPT_TYPE_CONST,
        { .i64 = TILT_NONE }, INT_MIN, INT_MAX, .flags = V, .unit = "start" },
    { "frame", "Use the first frames", 0, AV_OPT_TYPE_CONST,
        { .i64 = TILT_FRAME }, INT_MIN, INT_MAX, .flags = V, .unit = "start" },
    { "black", "Fill with black", 0, AV_OPT_TYPE_CONST,
        { .i64 = TILT_BLACK }, INT_MIN, INT_MAX, .flags = V, .unit = "start" },
 
    { "end", "Action at the end of input", OFFSET(end), AV_OPT_TYPE_INT,
        { .i64 = TILT_NONE }, 0, TILT_OPT_MAX, .flags = V, .unit = "end" },
    { "none", "Do not pad at the end (default)", 0, AV_OPT_TYPE_CONST,
        { .i64 = TILT_NONE }, INT_MIN, INT_MAX, .flags = V, .unit = "end" },
    { "frame", "Use the last frame", 0, AV_OPT_TYPE_CONST,
        { .i64 = TILT_FRAME }, INT_MIN, INT_MAX, .flags = V, .unit = "end" },
    { "black", "Fill with black", 0, AV_OPT_TYPE_CONST,
        { .i64 = TILT_BLACK }, INT_MIN, INT_MAX, .flags = V, .unit = "end" },
 
    { "hold", "Number of columns to hold at the start of the video", OFFSET(hold), AV_OPT_TYPE_INT,
        { .i64 = 0 }, 0, INT_MAX, .flags = V, .unit = "hold" },
    { "pad", "Number of columns to pad at the end of the video", OFFSET(pad), AV_OPT_TYPE_INT,
        { .i64 = 0 }, 0, INT_MAX, .flags = V, .unit = "pad" },
 
    { NULL },
}

Definition at line 310 of file vf_tiltandshift.c.

tiltandshift_inputs

const AVFilterPad tiltandshift_inputs[]

static

Initial value:

= {
    {
        .name         = "in",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
    },
}

Definition at line 342 of file vf_tiltandshift.c.

tiltandshift_outputs

const AVFilterPad tiltandshift_outputs[]

static

Initial value:

= {
    {
        .name          = "out",
        .type          = AVMEDIA_TYPE_VIDEO,
        .config_props  = config_props,
        .request_frame = request_frame,
    },
}

Definition at line 350 of file vf_tiltandshift.c.

ff_vf_tiltandshift

const AVFilter ff_vf_tiltandshift

Initial value:

= {
    .name          = "tiltandshift",
    .description   = NULL_IF_CONFIG_SMALL("Generate a tilt-and-shift'd video."),
    .priv_size     = sizeof(TiltandshiftContext),
    .priv_class    = &tiltandshift_class,
    .uninit        = uninit,
    FILTER_INPUTS(tiltandshift_inputs),
    FILTER_OUTPUTS(tiltandshift_outputs),
    FILTER_PIXFMTS_ARRAY(pix_fmts),
}

Definition at line 359 of file vf_tiltandshift.c.