vf_histogram.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	HistogramContext

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

Enumerations
enum	HistogramMode {   MODE_LEVELS, MODE_WAVEFORM, MODE_COLOR, MODE_COLOR2,   MODE_NB }

Functions
	AVFILTER_DEFINE_CLASS (histogram)
static av_cold int	init (AVFilterContext *ctx, const char *args)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	config_output (AVFilterLink *outlink)
static int	filter_frame (AVFilterLink *inlink, AVFilterBufferRef *in)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	histogram_options []
static enum AVPixelFormat	color_pix_fmts []
static enum AVPixelFormat	levels_pix_fmts []
static const uint8_t	black_yuva_color [4] = { 0, 127, 127, 255 }
static const uint8_t	black_gbrp_color [4] = { 0, 0, 0, 255 }
static const uint8_t	white_yuva_color [4] = { 255, 127, 127, 255 }
static const uint8_t	white_gbrp_color [4] = { 255, 255, 255, 255 }
static const AVFilterPad	inputs []
static const AVFilterPad	outputs []
AVFilter	avfilter_vf_histogram

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(HistogramContext, x)

Definition at line 53 of file vf_histogram.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 54 of file vf_histogram.c.

Enumeration Type Documentation

enum HistogramMode

Enumerator:

MODE_LEVELS
MODE_WAVEFORM
MODE_COLOR
MODE_COLOR2
MODE_NB

Definition at line 30 of file vf_histogram.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

histogram

)

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

static

Definition at line 76 of file vf_histogram.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 100 of file vf_histogram.c.

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 128 of file vf_histogram.c.

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 148 of file vf_histogram.c.

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

static

Definition at line 177 of file vf_histogram.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 310 of file vf_histogram.c.

Variable Documentation

const AVOption histogram_options[]

static

Initial value:

= {
    { "mode", "set histogram mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_LEVELS}, 0, MODE_NB-1, FLAGS, "mode"},
    { "levels", "standard histogram", 0, AV_OPT_TYPE_CONST, {.i64=MODE_LEVELS}, 0, 0, FLAGS, "mode" },
    { "waveform", "per row/column luminance graph", 0, AV_OPT_TYPE_CONST, {.i64=MODE_WAVEFORM}, 0, 0, FLAGS, "mode" },
    { "color", "chroma values in vectorscope", 0, AV_OPT_TYPE_CONST, {.i64=MODE_COLOR}, 0, 0, FLAGS, "mode" },
    { "color2", "chroma values in vectorscope", 0, AV_OPT_TYPE_CONST, {.i64=MODE_COLOR2}, 0, 0, FLAGS, "mode" },
    { "level_height", "set level height", OFFSET(level_height), AV_OPT_TYPE_INT, {.i64=200}, 50, 2048, FLAGS},
    { "scale_height", "set scale height", OFFSET(scale_height), AV_OPT_TYPE_INT, {.i64=12}, 0, 40, FLAGS},
    { "step", "set waveform step value", OFFSET(step), AV_OPT_TYPE_INT, {.i64=10}, 1, 255, FLAGS},
    { "waveform_mode", "set waveform mode", OFFSET(waveform_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "waveform_mode"},
    { "row",   NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "waveform_mode" },
    { "column", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "waveform_mode" },
    { "display_mode", "set display mode", OFFSET(display_mode), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, "display_mode"},
    { "parade",  NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "display_mode" },
    { "overlay", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "display_mode" },
    { NULL },
}

Definition at line 56 of file vf_histogram.c.

enum AVPixelFormat color_pix_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVJ444P,
    AV_PIX_FMT_NONE
}

Definition at line 90 of file vf_histogram.c.

Referenced by query_formats().

enum AVPixelFormat levels_pix_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVJ444P,
    AV_PIX_FMT_GRAY8, AV_PIX_FMT_GBRP, AV_PIX_FMT_NONE
}

Definition at line 95 of file vf_histogram.c.

Referenced by query_formats().

const uint8_t black_yuva_color[4] = { 0, 127, 127, 255 }

static

Definition at line 123 of file vf_histogram.c.

Referenced by config_input().

const uint8_t black_gbrp_color[4] = { 0, 0, 0, 255 }

static

Definition at line 124 of file vf_histogram.c.

Referenced by config_input().

const uint8_t white_yuva_color[4] = { 255, 127, 127, 255 }

static

Definition at line 125 of file vf_histogram.c.

Referenced by config_input().

const uint8_t white_gbrp_color[4] = { 255, 255, 255, 255 }

static

Definition at line 126 of file vf_histogram.c.

Referenced by config_input().

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 317 of file vf_histogram.c.

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 328 of file vf_histogram.c.

AVFilter avfilter_vf_histogram

Initial value:

= {
    .name          = "histogram",
    .description   = NULL_IF_CONFIG_SMALL("Compute and draw a histogram."),
    .priv_size     = sizeof(HistogramContext),
    .init          = init,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = inputs,
    .outputs       = outputs,
    .priv_class    = &histogram_class,
}

Definition at line 337 of file vf_histogram.c.