avf_ahistogram.c File Reference

#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"

Go to the source code of this file.

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, REPLACE,   SCROLL, FULLFRAME, RSCROLL, 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 { ACCUMULATE, CURRENT, NB_HMODES }

Functions
	AVFILTER_DEFINE_CLASS (ahistogram)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
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 []
AVFilter	ff_avf_ahistogram

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(AudioHistogramContext, x)

Definition at line 61 of file avf_ahistogram.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 62 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
REPLACE
SCROLL
FULLFRAME
RSCROLL
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
ACCUMULATE
CURRENT
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 91 of file avf_ahistogram.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 118 of file avf_ahistogram.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 136 of file avf_ahistogram.c.

filter_frame()

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

static

Definition at line 157 of file avf_ahistogram.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 374 of file avf_ahistogram.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 396 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, "dmode" },
        { "single", "all channels use single histogram", 0, AV_OPT_TYPE_CONST, {.i64=SINGLE},   0, 0, FLAGS, "dmode" },
        { "separate", "each channel have own histogram", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "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, "scale" },
        { "log",  "logarithmic",         0, AV_OPT_TYPE_CONST, {.i64=LOG},    0, 0, FLAGS, "scale" },
        { "sqrt", "square root",         0, AV_OPT_TYPE_CONST, {.i64=SQRT},   0, 0, FLAGS, "scale" },
        { "cbrt", "cubic root",          0, AV_OPT_TYPE_CONST, {.i64=CBRT},   0, 0, FLAGS, "scale" },
        { "lin",  "linear",              0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
        { "rlog", "reverse logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=RLOG},   0, 0, FLAGS, "scale" },
    { "ascale", "set amplitude scale", OFFSET(ascale), AV_OPT_TYPE_INT, {.i64=ALOG}, LINEAR, NB_ASCALES-1, FLAGS, "ascale" },
        { "log",  "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=ALOG},    0, 0, FLAGS, "ascale" },
        { "lin",  "linear",      0, AV_OPT_TYPE_CONST, {.i64=ALINEAR}, 0, 0, FLAGS, "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, "slide" },
        { "replace", "replace old rows with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE},    0, 0, FLAGS, "slide" },
        { "scroll",  "scroll from top to bottom", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, FLAGS, "slide" },
    { NULL }
}

Definition at line 64 of file avf_ahistogram.c.

ahistogram_inputs

const AVFilterPad ahistogram_inputs[]

static

Initial value:

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

Definition at line 409 of file avf_ahistogram.c.

ahistogram_outputs

const AVFilterPad ahistogram_outputs[]

static

Initial value:

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

Definition at line 418 of file avf_ahistogram.c.

ff_avf_ahistogram

AVFilter ff_avf_ahistogram

Initial value:

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

Definition at line 427 of file avf_ahistogram.c.