vf_palettegen.c File Reference

Generate one palette for a whole video stream. More...

#include "libavutil/avassert.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/qsort.h"
#include "libavutil/intreadwrite.h"
#include "avfilter.h"
#include "internal.h"

Classes
struct	color_ref
struct	range_box
struct	hist_node
struct	PaletteGenContext

Macros
#define	NBITS   5
#define	HIST_SIZE   (1<<(3*NBITS))
#define	OFFSET(x)   offsetof(PaletteGenContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	DECLARE_CMP_FUNC(name, pos)

Typedefs
typedef struct PaletteGenContext	PaletteGenContext
typedef int(*	cmp_func) (const void *, const void *)

Enumerations
enum	{ STATS_MODE_ALL_FRAMES, STATS_MODE_DIFF_FRAMES, STATS_MODE_SINGLE_FRAMES, NB_STATS_MODE }

Functions
	AVFILTER_DEFINE_CLASS (palettegen)

Variables
AVFilter	ff_vf_palettegen

Detailed Description

Generate one palette for a whole video stream.

Macro Definition Documentation

DECLARE_CMP_FUNC

#define DECLARE_CMP_FUNC	(		name,
			pos
	)

Value:

static int cmp_##name(const void *pa, const void *pb)   \
{                                                       \
    const struct color_ref * const *a = pa;             \
    const struct color_ref * const *b = pb;             \
    return   ((*a)->color >> (8 * (2 - (pos))) & 0xff)  \
           - ((*b)->color >> (8 * (2 - (pos))) & 0xff); \
}

Variable Documentation

ff_vf_palettegen

AVFilter ff_vf_palettegen

Initial value:

= {
    .name          = "palettegen",
    .description   = NULL_IF_CONFIG_SMALL("Find the optimal palette for a given stream."),
    .priv_size     = sizeof(PaletteGenContext),
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = palettegen_inputs,
    .outputs       = palettegen_outputs,
    .priv_class    = &palettegen_class,
}