avf_showcqt.c File Reference

#include "config.h"
#include "libavcodec/avfft.h"
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavutil/xga_font_data.h"
#include "libavutil/qsort.h"
#include "libavutil/time.h"
#include "libavutil/eval.h"
#include "avfilter.h"
#include "internal.h"
#include <math.h>
#include <stdlib.h>

Go to the source code of this file.

Data Structures
struct	SparseCoeff
struct	ShowCQTContext

Macros
#define	VIDEO_WIDTH   1920
#define	VIDEO_HEIGHT   1080
#define	FONT_HEIGHT   32
#define	SPECTOGRAM_HEIGHT   ((VIDEO_HEIGHT-FONT_HEIGHT)/2)
#define	SPECTOGRAM_START   (VIDEO_HEIGHT-SPECTOGRAM_HEIGHT)
#define	BASE_FREQ   20.051392800492
#define	COEFF_CLAMP   1.0e-4
#define	TLENGTH_MIN   0.001
#define	TLENGTH_DEFAULT   "384/f*tc/(384/f+tc)"
#define	VOLUME_MIN   1e-10
#define	VOLUME_MAX   100.0
#define	FONTCOLOR_DEFAULT
#define	OFFSET(x)   offsetof(ShowCQTContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Functions
	AVFILTER_DEFINE_CLASS (showcqt)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static double	a_weighting (void *p, double f)
static double	b_weighting (void *p, double f)
static double	c_weighting (void *p, double f)
static double	midi (void *p, double f)
static double	r_func (void *p, double x)
static double	g_func (void *p, double x)
static double	b_func (void *p, double x)
static int	qsort_sparsecoeff (const SparseCoeff *a, const SparseCoeff *b)
static int	config_output (AVFilterLink *outlink)
static int	plot_cqt (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *insamples)
static int	request_frame (AVFilterLink *outlink)

Variables
static const AVOption	showcqt_options []
static const AVFilterPad	showcqt_inputs []
static const AVFilterPad	showcqt_outputs []
AVFilter	ff_avf_showcqt

Macro Definition Documentation

#define VIDEO_WIDTH   1920

Definition at line 46 of file avf_showcqt.c.

Referenced by config_output(), plot_cqt(), and uninit().

#define VIDEO_HEIGHT   1080

Definition at line 47 of file avf_showcqt.c.

Referenced by config_output().

#define FONT_HEIGHT   32

Definition at line 48 of file avf_showcqt.c.

Referenced by plot_cqt().

#define SPECTOGRAM_HEIGHT   ((VIDEO_HEIGHT-FONT_HEIGHT)/2)

Definition at line 49 of file avf_showcqt.c.

Referenced by config_output(), and plot_cqt().

#define SPECTOGRAM_START   (VIDEO_HEIGHT-SPECTOGRAM_HEIGHT)

Definition at line 50 of file avf_showcqt.c.

Referenced by plot_cqt().

#define BASE_FREQ   20.051392800492

Definition at line 51 of file avf_showcqt.c.

Referenced by config_output().

#define COEFF_CLAMP   1.0e-4

Definition at line 52 of file avf_showcqt.c.

Referenced by config_output().

#define TLENGTH_MIN   0.001

Definition at line 53 of file avf_showcqt.c.

Referenced by config_output().

#define TLENGTH_DEFAULT   "384/f*tc/(384/f+tc)"

Definition at line 54 of file avf_showcqt.c.

#define VOLUME_MIN   1e-10

Definition at line 55 of file avf_showcqt.c.

Referenced by config_output().

#define VOLUME_MAX   100.0

Definition at line 56 of file avf_showcqt.c.

Referenced by config_output().

#define FONTCOLOR_DEFAULT

Value:

"st(0, (midi(f)-59.5)/12);" \
    "st(1, if(between(ld(0),0,1), 0.5-0.5*cos(2*PI*ld(0)), 0));" \
    "r(1-ld(1)) + b(ld(1))"

Definition at line 57 of file avf_showcqt.c.

#define OFFSET

(

x

)

offsetof(ShowCQTContext, x)

Definition at line 98 of file avf_showcqt.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 99 of file avf_showcqt.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

showcqt

)

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 118 of file avf_showcqt.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 136 of file avf_showcqt.c.

static double a_weighting ( void *  p, double  f  )

static

Definition at line 263 of file avf_showcqt.c.

Referenced by config_output().

static double b_weighting ( void *  p, double  f  )

static

Definition at line 271 of file avf_showcqt.c.

Referenced by config_output().

static double c_weighting ( void *  p, double  f  )

static

Definition at line 278 of file avf_showcqt.c.

Referenced by config_output().

static double midi ( void *  p, double  f  )

static

Definition at line 285 of file avf_showcqt.c.

Referenced by config_output().

static double r_func ( void *  p, double  x  )

static

Definition at line 290 of file avf_showcqt.c.

Referenced by config_output().

static double g_func ( void *  p, double  x  )

static

Definition at line 296 of file avf_showcqt.c.

Referenced by config_output().

static double b_func ( void *  p, double  x  )

static

Definition at line 302 of file avf_showcqt.c.

Referenced by config_output().

static int qsort_sparsecoeff ( const SparseCoeff *  a, const SparseCoeff *  b  )

inlinestatic

Definition at line 308 of file avf_showcqt.c.

Referenced by config_output().

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 316 of file avf_showcqt.c.

static int plot_cqt ( AVFilterLink *  inlink )

static

Definition at line 528 of file avf_showcqt.c.

Referenced by filter_frame().

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

static

Definition at line 706 of file avf_showcqt.c.

Referenced by request_frame().

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 766 of file avf_showcqt.c.

Variable Documentation

const AVOption showcqt_options[]

static

Initial value:

= {
    { "volume", "set volume", OFFSET(volume), AV_OPT_TYPE_STRING, { .str = "16" }, CHAR_MIN, CHAR_MAX, FLAGS },
    { "tlength", "set transform length", OFFSET(tlength), AV_OPT_TYPE_STRING, { .str = TLENGTH_DEFAULT }, CHAR_MIN, CHAR_MAX, FLAGS },
    { "timeclamp", "set timeclamp", OFFSET(timeclamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 }, 0.1, 1.0, FLAGS },
    { "coeffclamp", "set coeffclamp", OFFSET(coeffclamp), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, 0.1, 10, FLAGS },
    { "gamma", "set gamma", OFFSET(gamma), AV_OPT_TYPE_FLOAT, { .dbl = 3 }, 1, 7, FLAGS },
    { "gamma2", "set gamma of bargraph", OFFSET(gamma2), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, 1, 7, FLAGS },
    { "fullhd", "set full HD resolution", OFFSET(fullhd), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS },
    { "fps", "set video fps", OFFSET(fps), AV_OPT_TYPE_INT, { .i64 = 25 }, 10, 100, FLAGS },
    { "count", "set number of transform per frame", OFFSET(count), AV_OPT_TYPE_INT, { .i64 = 6 }, 1, 30, FLAGS },
    { "fontfile", "set font file", OFFSET(fontfile), AV_OPT_TYPE_STRING, { .str = NULL }, CHAR_MIN, CHAR_MAX, FLAGS },
    { "fontcolor", "set font color", OFFSET(fontcolor), AV_OPT_TYPE_STRING, { .str = FONTCOLOR_DEFAULT }, CHAR_MIN, CHAR_MAX, FLAGS },
    { NULL }
}

Definition at line 101 of file avf_showcqt.c.

const AVFilterPad showcqt_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .filter_frame = filter_frame,
    },
    { NULL }
}

Definition at line 782 of file avf_showcqt.c.

const AVFilterPad showcqt_outputs[]

static

Initial value:

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

Definition at line 791 of file avf_showcqt.c.

AVFilter ff_avf_showcqt

Initial value:

= {
    .name          = "showcqt",
    .description   = NULL_IF_CONFIG_SMALL("Convert input audio to a CQT (Constant Q Transform) spectrum video output."),
    .uninit        = uninit,
    .query_formats = query_formats,
    .priv_size     = sizeof(ShowCQTContext),
    .inputs        = showcqt_inputs,
    .outputs       = showcqt_outputs,
    .priv_class    = &showcqt_class,
}

Definition at line 801 of file avf_showcqt.c.