vf_geq.c File Reference

Generic equation change filter Originally written by Michael Niedermayer for the MPlayer project, and ported by Clément Bœsch for FFmpeg. More...

#include "libavutil/avstring.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	GEQContext

Macros
#define	OFFSET(x)   offsetof(GEQContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Enumerations
enum	{   VAR_X, VAR_Y, VAR_W, VAR_H,   VAR_N, VAR_SW, VAR_SH, VAR_T,   VAR_VARS_NB }

Functions
	AVFILTER_DEFINE_CLASS (geq)
static double	getpix (void *priv, double x, double y, int plane)
static double	lum (void *priv, double x, double y)
static double	cb (void *priv, double x, double y)
static double	cr (void *priv, double x, double y)
static av_cold int	geq_init (AVFilterContext *ctx, const char *args)
static int	geq_query_formats (AVFilterContext *ctx)
static int	geq_config_props (AVFilterLink *inlink)
static int	geq_filter_frame (AVFilterLink *inlink, AVFilterBufferRef *in)
static av_cold void	geq_uninit (AVFilterContext *ctx)

Variables
static const AVOption	geq_options []
static const char *const	var_names [] = { "X", "Y", "W", "H", "N", "SW", "SH", "T", NULL }
static const AVFilterPad	geq_inputs []
static const AVFilterPad	geq_outputs []
AVFilter	avfilter_vf_geq

Detailed Description

Generic equation change filter Originally written by Michael Niedermayer for the MPlayer project, and ported by Clément Bœsch for FFmpeg.

Definition in file vf_geq.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(GEQContext, x)

Definition at line 44 of file vf_geq.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 45 of file vf_geq.c.

Enumeration Type Documentation

anonymous enum

Enumerator:

VAR_X
VAR_Y
VAR_W
VAR_H
VAR_N
VAR_SW
VAR_SH
VAR_T
VAR_VARS_NB

Definition at line 83 of file vf_geq.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

geq

)

static double getpix ( void *  priv, double  x, double  y, int  plane  )

inlinestatic

Definition at line 56 of file vf_geq.c.

Referenced by cb(), cr(), and lum().

static double lum ( void *  priv, double  x, double  y  )

static

Definition at line 78 of file vf_geq.c.

Referenced by blend_subrect(), and geq_init().

static double cb ( void *  priv, double  x, double  y  )

static

Definition at line 79 of file vf_geq.c.

Referenced by av_lockmgr_register(), blend_subrect(), codebook_trellis_rate(), create_vorbis_context(), decode_frame(), decode_lsp(), decode_q_branch(), dvbsub_parse_clut_segment(), encode_q_branch(), encode_window_bands_info(), escape130_decode_frame(), fill_gv_table(), fill_table(), find_best_vect(), find_min_book(), geq_init(), idct_put(), parse_palette_segment(), pgmyuv_save(), quantize_and_encode_band_cost_template(), ready_residue(), search_for_quantizers_anmr(), search_for_quantizers_twoloop(), set_blocks(), snow_set_blocks(), unpack_codebook(), vcr1_decode_frame(), vorbis_parse_setup_hdr_codebooks(), and yuv_a_to_rgba().

static double cr ( void *  priv, double  x, double  y  )

static

Definition at line 80 of file vf_geq.c.

Referenced by blend_subrect(), decode_frame(), decode_q_branch(), draw_mandelbrot(), dvbsub_parse_clut_segment(), encode_q_branch(), escape130_decode_frame(), geq_init(), idct_put(), parse_palette_segment(), pgmyuv_save(), set_blocks(), snow_set_blocks(), vcr1_decode_frame(), and yuv_a_to_rgba().

static av_cold int geq_init ( AVFilterContext *  ctx, const char *  args  )

static

Definition at line 85 of file vf_geq.c.

static int geq_query_formats ( AVFilterContext *  ctx )

static

Definition at line 133 of file vf_geq.c.

static int geq_config_props ( AVFilterLink *  inlink )

static

Definition at line 145 of file vf_geq.c.

static int geq_filter_frame ( AVFilterLink *  inlink, AVFilterBufferRef *  in  )

static

Definition at line 155 of file vf_geq.c.

static av_cold void geq_uninit ( AVFilterContext *  ctx )

static

Definition at line 200 of file vf_geq.c.

Variable Documentation

const AVOption geq_options[]

static

Initial value:

= {
    { "lum_expr",   "set luminance expression",   OFFSET(expr_str),                   AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "cb_expr",    "set chroma blue expression", OFFSET(expr_str) +   sizeof(char*), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "cr_expr",    "set chroma red expression",  OFFSET(expr_str) + 2*sizeof(char*), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
    {NULL},
}

Definition at line 47 of file vf_geq.c.

const char* const var_names[] = { "X", "Y", "W", "H", "N", "SW", "SH", "T", NULL }

static

Definition at line 82 of file vf_geq.c.

Referenced by geq_init().

const AVFilterPad geq_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = geq_config_props,
        .filter_frame = geq_filter_frame,
        .min_perms    = AV_PERM_READ,
    },
    { NULL }
}

Definition at line 210 of file vf_geq.c.

const AVFilterPad geq_outputs[]

static

Initial value:

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

Definition at line 221 of file vf_geq.c.

AVFilter avfilter_vf_geq

Initial value:

= {
    .name          = "geq",
    .description   = NULL_IF_CONFIG_SMALL("Apply generic equation to each pixel."),
    .priv_size     = sizeof(GEQContext),
    .init          = geq_init,
    .uninit        = geq_uninit,
    .query_formats = geq_query_formats,
    .inputs        = geq_inputs,
    .outputs       = geq_outputs,
    .priv_class    = &geq_class,
}

Definition at line 229 of file vf_geq.c.