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

Data Structures
struct	AudioHistogramContext

Macros
#define	OFFSET(x) offsetof(AudioHistogramContext, x)

#define	FLAGS AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_VIDEO_PARAM

Enumerations
enum	DisplayScale { LINEAR, SQRT, CBRT, LOG, RLOG, NB_SCALES, LINEAR, SQRT, CBRT, LOG, FOURTHRT, FIFTHRT, NB_SCALES, LINEAR, LOG, NB_DISPLAY_SCALE }

enum	AmplitudeScale { ALINEAR, ALOG, NB_ASCALES, AS_LINEAR, AS_SQRT, AS_CBRT, AS_LOG, NB_ASCALES }

enum	SlideMode { REPLACE, SCROLL, NB_SLIDES, SLIDE_REPLACE, SLIDE_SCROLL, SLIDE_FRAME, NB_SLIDE, REPLACE, SCROLL, FULLFRAME, RSCROLL, LREPLACE, NB_SLIDES, REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES }

enum	DisplayMode { SINGLE, SEPARATE, NB_DMODES, LINE, BAR, DOT, NB_MODES, COMBINED, SEPARATE, NB_MODES }

enum	HistogramMode { ABS, SIGN, NB_HMODES }

Functions
	AVFILTER_DEFINE_CLASS (ahistogram)

static int	query_formats (AVFilterContext *ctx)

static int	config_input (AVFilterLink *inlink)

static int	get_lin_bin_abs (float in, int w)

static int	get_lin_bin_sign (float in, int w)

static int	get_log_bin_abs (float in, int w)

static int	get_log_bin_sign (float in, int w)

static int	config_output (AVFilterLink *outlink)

static int	filter_frame (AVFilterLink inlink, AVFrame in)

static int	activate (AVFilterContext *ctx)

static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	ahistogram_options []

static const AVFilterPad	ahistogram_inputs []

static const AVFilterPad	ahistogram_outputs []

const AVFilter	ff_avf_ahistogram

Macro Definition Documentation

◆ OFFSET

#define OFFSET ( x ) offsetof(AudioHistogramContext, x)

Definition at line 64 of file avf_ahistogram.c.

◆ FLAGS

#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 65 of file avf_ahistogram.c.

Enumeration Type Documentation

◆ DisplayScale

enum DisplayScale

Enumerator
LINEAR
SQRT
CBRT
LOG
RLOG
NB_SCALES
LINEAR
SQRT
CBRT
LOG
FOURTHRT
FIFTHRT
NB_SCALES
LINEAR
LOG
NB_DISPLAY_SCALE

Definition at line 31 of file avf_ahistogram.c.

◆ AmplitudeScale

enum AmplitudeScale

Enumerator
ALINEAR
ALOG
NB_ASCALES
AS_LINEAR
AS_SQRT
AS_CBRT
AS_LOG
NB_ASCALES

Definition at line 32 of file avf_ahistogram.c.

◆ SlideMode

enum SlideMode

Enumerator
REPLACE
SCROLL
NB_SLIDES
SLIDE_REPLACE
SLIDE_SCROLL
SLIDE_FRAME
NB_SLIDE
REPLACE
SCROLL
FULLFRAME
RSCROLL
LREPLACE
NB_SLIDES
REPLACE
SCROLL
FULLFRAME
RSCROLL
NB_SLIDES

Definition at line 33 of file avf_ahistogram.c.

◆ DisplayMode

enum DisplayMode

Enumerator
SINGLE
SEPARATE
NB_DMODES
LINE
BAR
DOT
NB_MODES
COMBINED
SEPARATE
NB_MODES

Definition at line 34 of file avf_ahistogram.c.

◆ HistogramMode

enum HistogramMode

Enumerator
ABS
SIGN
NB_HMODES

Definition at line 35 of file avf_ahistogram.c.

Function Documentation

◆ AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS ( ahistogram )

◆ query_formats()

static int query_formats ( AVFilterContext * ctx )

static

Definition at line 97 of file avf_ahistogram.c.

◆ config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 124 of file avf_ahistogram.c.

◆ get_lin_bin_abs()

static int get_lin_bin_abs	(	float	in,
		int	w
	)

static

Definition at line 142 of file avf_ahistogram.c.

Referenced by config_output().

◆ get_lin_bin_sign()

static int get_lin_bin_sign	(	float	in,
		int	w
	)

static

Definition at line 147 of file avf_ahistogram.c.

Referenced by config_output().

◆ get_log_bin_abs()

static int get_log_bin_abs	(	float	in,
		int	w
	)

static

Definition at line 152 of file avf_ahistogram.c.

Referenced by config_output().

◆ get_log_bin_sign()

static int get_log_bin_sign	(	float	in,
		int	w
	)

static

Definition at line 157 of file avf_ahistogram.c.

Referenced by config_output().

◆ config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 162 of file avf_ahistogram.c.

◆ filter_frame()

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

static

Definition at line 205 of file avf_ahistogram.c.

Referenced by activate().

◆ activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 449 of file avf_ahistogram.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 476 of file avf_ahistogram.c.

Variable Documentation

◆ ahistogram_options

const AVOption ahistogram_options[]

static

Initial value:

= {
    { "dmode", "set method to display channels", OFFSET(dmode), AV_OPT_TYPE_INT, {.i64=SINGLE}, 0, NB_DMODES-1, FLAGS, .unit = "dmode" },
        { "single", "all channels use single histogram", 0, AV_OPT_TYPE_CONST, {.i64=SINGLE},   0, 0, FLAGS, .unit = "dmode" },
        { "separate", "each channel have own histogram", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, .unit = "dmode" },
    { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
    { "r",    "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
    { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, FLAGS },
    { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, FLAGS },
    { "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, LINEAR, NB_SCALES-1, FLAGS, .unit = "scale" },
        { "log",  "logarithmic",         0, AV_OPT_TYPE_CONST, {.i64=LOG},    0, 0, FLAGS, .unit = "scale" },
        { "sqrt", "square root",         0, AV_OPT_TYPE_CONST, {.i64=SQRT},   0, 0, FLAGS, .unit = "scale" },
        { "cbrt", "cubic root",          0, AV_OPT_TYPE_CONST, {.i64=CBRT},   0, 0, FLAGS, .unit = "scale" },
        { "lin",  "linear",              0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, .unit = "scale" },
        { "rlog", "reverse logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=RLOG},   0, 0, FLAGS, .unit = "scale" },
    { "ascale", "set amplitude scale", OFFSET(ascale), AV_OPT_TYPE_INT, {.i64=ALOG}, LINEAR, NB_ASCALES-1, FLAGS, .unit = "ascale" },
        { "log",  "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=ALOG},    0, 0, FLAGS, .unit = "ascale" },
        { "lin",  "linear",      0, AV_OPT_TYPE_CONST, {.i64=ALINEAR}, 0, 0, FLAGS, .unit = "ascale" },
    { "acount", "how much frames to accumulate", OFFSET(count), AV_OPT_TYPE_INT, {.i64=1}, -1, 100, FLAGS },
    { "rheight", "set histogram ratio of window height", OFFSET(phisto), AV_OPT_TYPE_FLOAT, {.dbl=0.10}, 0, 1, FLAGS },
    { "slide", "set sonogram sliding", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=REPLACE}, 0, NB_SLIDES-1, FLAGS, .unit = "slide" },
        { "replace", "replace old rows with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE},    0, 0, FLAGS, .unit = "slide" },
        { "scroll",  "scroll from top to bottom", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, FLAGS, .unit = "slide" },
    { "hmode", "set histograms mode", OFFSET(hmode), AV_OPT_TYPE_INT, {.i64=ABS}, 0, NB_HMODES-1, FLAGS, .unit = "hmode" },
        { "abs",  "use absolute samples",  0, AV_OPT_TYPE_CONST, {.i64=ABS}, 0, 0, FLAGS, .unit = "hmode" },
        { "sign", "use unchanged samples", 0, AV_OPT_TYPE_CONST, {.i64=SIGN},0, 0, FLAGS, .unit = "hmode" },
    { NULL }
}

Definition at line 67 of file avf_ahistogram.c.

◆ ahistogram_inputs

const AVFilterPad ahistogram_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .config_props = config_input,
    },
}

Definition at line 489 of file avf_ahistogram.c.

◆ ahistogram_outputs

const AVFilterPad ahistogram_outputs[]

static

Initial value:

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

Definition at line 497 of file avf_ahistogram.c.

◆ ff_avf_ahistogram

const AVFilter ff_avf_ahistogram

Initial value:

= {
    .name          = "ahistogram",
    .description   = NULL_IF_CONFIG_SMALL("Convert input audio to histogram video output."),
    .uninit        = uninit,
    .priv_size     = sizeof(AudioHistogramContext),
    .activate      = activate,
    FILTER_INPUTS(ahistogram_inputs),
    FILTER_OUTPUTS(ahistogram_outputs),
    FILTER_QUERY_FUNC(query_formats),
    .priv_class    = &ahistogram_class,
}

Definition at line 505 of file avf_ahistogram.c.

Data Structures

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

◆ OFFSET

◆ FLAGS

Enumeration Type Documentation

◆ DisplayScale

◆ AmplitudeScale

◆ SlideMode

◆ DisplayMode

◆ HistogramMode

Function Documentation

◆ AVFILTER_DEFINE_CLASS()

◆ query_formats()

◆ config_input()

◆ get_lin_bin_abs()

◆ get_lin_bin_sign()

◆ get_log_bin_abs()

◆ get_log_bin_sign()

◆ config_output()

◆ filter_frame()

◆ activate()

◆ uninit()

Variable Documentation

◆ ahistogram_options

◆ ahistogram_inputs

◆ ahistogram_outputs

◆ ff_avf_ahistogram