vf_monochrome.c File Reference

#include <float.h>
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	MonochromeContext

Macros
#define	PROCESS()
#define	OFFSET(x)   offsetof(MonochromeContext, x)
#define	VF   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Functions
static float	envelope (const float x)
static float	filter (float b, float r, float u, float v, float size)
static int	monochrome_slice8 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	monochrome_slice16 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	clear_slice8 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	clear_slice16 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *frame)
static av_cold int	query_formats (AVFilterContext *ctx)
static av_cold int	config_input (AVFilterLink *inlink)
	AVFILTER_DEFINE_CLASS (monochrome)

Variables
static const AVFilterPad	monochrome_inputs []
static const AVFilterPad	monochrome_outputs []
static const AVOption	monochrome_options []
AVFilter	ff_vf_monochrome

Macro Definition Documentation

PROCESS

#define PROCESS

(

)

Value:

    const int cx = x >> subw;                \
    float y = yptr[x] * imax;                \
    float u = uptr[cx] * imax - .5f;         \
    float v = vptr[cx] * imax - .5f;         \
    float tt, t, ny;                         \
                                             \
    ny = filter(b, r, u, v, size);           \
    tt = envelope(y);                        \
    t = tt + (1.f - tt) * ihigh;             \
    ny = (1.f - t) * y + t * ny * y;

Definition at line 68 of file vf_monochrome.c.

OFFSET

#define OFFSET

(

x

)

offsetof(MonochromeContext, x)

Definition at line 291 of file vf_monochrome.c.

VF

#define VF   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 292 of file vf_monochrome.c.

Function Documentation

envelope()

static float envelope ( const float  x )

static

Definition at line 46 of file vf_monochrome.c.

Referenced by amqp_proto_read(), and waves_synth().

filter()

static float filter ( float  b, float  r, float  u, float  v, float  size  )

static

Definition at line 61 of file vf_monochrome.c.

monochrome_slice8()

static int monochrome_slice8 ( AVFilterContext *  ctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 80 of file vf_monochrome.c.

Referenced by config_input().

monochrome_slice16()

static int monochrome_slice16 ( AVFilterContext *  ctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 119 of file vf_monochrome.c.

Referenced by config_input().

clear_slice8()

static int clear_slice8 ( AVFilterContext *  ctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 158 of file vf_monochrome.c.

Referenced by config_input().

clear_slice16()

static int clear_slice16 ( AVFilterContext *  ctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 184 of file vf_monochrome.c.

Referenced by config_input().

filter_frame()

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

static

Definition at line 212 of file vf_monochrome.c.

query_formats()

static av_cold int query_formats ( AVFilterContext *  ctx )

static

Definition at line 225 of file vf_monochrome.c.

config_input()

static av_cold int config_input ( AVFilterLink *  inlink )

static

Definition at line 257 of file vf_monochrome.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

monochrome

)

Variable Documentation

monochrome_inputs

const AVFilterPad monochrome_inputs[]

static

Initial value:

= {
    {
        .name           = "default",
        .type           = AVMEDIA_TYPE_VIDEO,
        .needs_writable = 1,
        .filter_frame   = filter_frame,
        .config_props   = config_input,
    },
    { NULL }
}

Definition at line 272 of file vf_monochrome.c.

monochrome_outputs

const AVFilterPad monochrome_outputs[]

static

Initial value:

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

Definition at line 283 of file vf_monochrome.c.

monochrome_options

const AVOption monochrome_options[]

static

Initial value:

= {
    { "cb",   "set the chroma blue spot",    OFFSET(b),    AV_OPT_TYPE_FLOAT, {.dbl=0},-1, 1, VF },
    { "cr",   "set the chroma red spot",     OFFSET(r),    AV_OPT_TYPE_FLOAT, {.dbl=0},-1, 1, VF },
    { "size", "set the color filter size",   OFFSET(size), AV_OPT_TYPE_FLOAT, {.dbl=1},.1,10, VF },
    { "high", "set the highlights strength", OFFSET(high), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
    { NULL }
}

Definition at line 294 of file vf_monochrome.c.

ff_vf_monochrome

AVFilter ff_vf_monochrome

Initial value:

= {
    .name          = "monochrome",
    .description   = NULL_IF_CONFIG_SMALL("Convert video to gray using custom color filter."),
    .priv_size     = sizeof(MonochromeContext),
    .priv_class    = &monochrome_class,
    .query_formats = query_formats,
    .inputs        = monochrome_inputs,
    .outputs       = monochrome_outputs,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
    .process_command = ff_filter_process_command,
}

Definition at line 304 of file vf_monochrome.c.