avf_ahistogram.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	AudioHistogramContext

Macros
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Enumerations
enum	DisplayScale {   LINEAR , SQRT , CBRT , LOG ,   RLOG , NB_SCALES }
enum	AmplitudeScale { ALINEAR , ALOG , NB_ASCALES }
enum	SlideMode { REPLACE , SCROLL , NB_SLIDES }
enum	DisplayMode { SINGLE , SEPARATE , NB_DMODES }
enum	HistogramMode { ABS , SIGN , NB_HMODES }

Functions
	AVFILTER_DEFINE_CLASS (ahistogram)
static int	query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
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 FFFilter	ff_avf_ahistogram

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(AudioHistogramContext, x)

Definition at line 62 of file avf_ahistogram.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 63 of file avf_ahistogram.c.

Enumeration Type Documentation

DisplayScale

enum DisplayScale

Enumerator
LINEAR
SQRT
CBRT
LOG
RLOG
NB_SCALES

Definition at line 29 of file avf_ahistogram.c.

AmplitudeScale

enum AmplitudeScale

Enumerator
ALINEAR
ALOG
NB_ASCALES

Definition at line 30 of file avf_ahistogram.c.

SlideMode

enum SlideMode

Enumerator
REPLACE
SCROLL
NB_SLIDES

Definition at line 31 of file avf_ahistogram.c.

DisplayMode

enum DisplayMode

Enumerator
SINGLE
SEPARATE
NB_DMODES

Definition at line 32 of file avf_ahistogram.c.

HistogramMode

enum HistogramMode

Enumerator
ABS
SIGN
NB_HMODES

Definition at line 33 of file avf_ahistogram.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

ahistogram

)

query_formats()

static int query_formats ( const AVFilterContext * ctx, AVFilterFormatsConfig ** cfg_in, AVFilterFormatsConfig ** cfg_out )

static

Definition at line 95 of file avf_ahistogram.c.

config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 115 of file avf_ahistogram.c.

get_lin_bin_abs()

static int get_lin_bin_abs ( float in, int w )

static

Definition at line 133 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 138 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 143 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 148 of file avf_ahistogram.c.

Referenced by config_output().

config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 153 of file avf_ahistogram.c.

filter_frame()

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

static

Definition at line 197 of file avf_ahistogram.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 441 of file avf_ahistogram.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 468 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 65 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 481 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 489 of file avf_ahistogram.c.

ff_avf_ahistogram

const FFFilter ff_avf_ahistogram

Initial value:

= {
    .p.name        = "ahistogram",
    .p.description = NULL_IF_CONFIG_SMALL("Convert input audio to histogram video output."),
    .p.priv_class  = &ahistogram_class,
    .uninit        = uninit,
    .priv_size     = sizeof(AudioHistogramContext),
    .activate      = activate,
    FILTER_INPUTS(ahistogram_inputs),
    FILTER_OUTPUTS(ahistogram_outputs),
    FILTER_QUERY_FUNC2(query_formats),
}

Definition at line 497 of file avf_ahistogram.c.