af_superequalizer.c File Reference

#include "libavutil/opt.h"
#include "libavcodec/avfft.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	EqParameter
struct	SuperEqualizerContext

Macros
#define	NBANDS   17
#define	M   15
#define	AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	OFFSET(x)   offsetof(SuperEqualizerContext, x)

Functions
static float	izero (SuperEqualizerContext *s, float x)
static float	hn_lpf (int n, float f, float fs)
static float	hn_imp (int n)
static float	hn (int n, EqParameter *param, float fs)
static float	alpha (float a)
static float	win (SuperEqualizerContext *s, float n, int N)
static void	process_param (float *bc, EqParameter *param, float fs)
static int	equ_init (SuperEqualizerContext *s, int wb)
static void	make_fir (SuperEqualizerContext *s, float *lbc, float *rbc, EqParameter *param, float fs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	activate (AVFilterContext *ctx)
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	config_output (AVFilterLink *outlink)
static av_cold void	uninit (AVFilterContext *ctx)
	AVFILTER_DEFINE_CLASS (superequalizer)

Variables
static const float	bands []
static const AVFilterPad	superequalizer_inputs []
static const AVFilterPad	superequalizer_outputs []
static const AVOption	superequalizer_options []
AVFilter	ff_af_superequalizer

Macro Definition Documentation

NBANDS

#define NBANDS   17

Definition at line 31 of file af_superequalizer.c.

M

#define M   15

Definition at line 32 of file af_superequalizer.c.

AF

#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 350 of file af_superequalizer.c.

OFFSET

#define OFFSET

(

x

)

offsetof(SuperEqualizerContext, x)

Definition at line 351 of file af_superequalizer.c.

Function Documentation

izero()

static float izero ( SuperEqualizerContext *  s, float  x  )

static

Definition at line 61 of file af_superequalizer.c.

Referenced by equ_init(), and win().

hn_lpf()

static float hn_lpf ( int  n, float  f, float  fs  )

static

Definition at line 76 of file af_superequalizer.c.

Referenced by hn().

hn_imp()

static float hn_imp ( int  n )

static

Definition at line 86 of file af_superequalizer.c.

Referenced by hn().

hn()

static float hn ( int  n, EqParameter *  param, float  fs  )

static

Definition at line 91 of file af_superequalizer.c.

Referenced by make_fir(), and vaapi_encode_h264_default_ref_pic_list().

alpha()

static float alpha ( float  a )

static

Definition at line 110 of file af_superequalizer.c.

Referenced by equ_init(), and win().

win()

static float win ( SuperEqualizerContext *  s, float  n, int  N  )

static

Definition at line 119 of file af_superequalizer.c.

Referenced by apply_window_and_mdct(), celt_frame_mdct(), check_vector_fmul_window(), check_vector_fmul_window_scaled(), codebook_trellis_rate(), compute_imdct(), encode_window_bands_info(), ff_imdct36_blocks_TMPL(), ff_vector_fmul_window_altivec(), ff_vector_fmul_window_vsx(), generate_kernel(), imdct36(), make_fir(), test_vector_fmul_window(), transform(), vector_fmul_window_c(), vector_fmul_window_scaled_c(), vector_multiplication(), vector_rmultiplication(), and vorbis_parse_audio_packet().

process_param()

static void process_param ( float *  bc, EqParameter *  param, float  fs  )

static

Definition at line 124 of file af_superequalizer.c.

Referenced by make_fir().

equ_init()

static int equ_init ( SuperEqualizerContext *  s, int  wb  )

static

Definition at line 135 of file af_superequalizer.c.

Referenced by init().

make_fir()

static void make_fir ( SuperEqualizerContext *  s, float *  lbc, float *  rbc, EqParameter *  param, float  fs  )

static

Definition at line 163 of file af_superequalizer.c.

Referenced by config_output().

filter_frame()

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

static

Definition at line 185 of file af_superequalizer.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 244 of file af_superequalizer.c.

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 266 of file af_superequalizer.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 273 of file af_superequalizer.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 298 of file af_superequalizer.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 310 of file af_superequalizer.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 320 of file af_superequalizer.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

superequalizer

)

Variable Documentation

bands

const float bands[]

static

Initial value:

= {
    65.406392, 92.498606, 130.81278, 184.99721, 261.62557, 369.99442, 523.25113, 739.9884, 1046.5023,
    1479.9768, 2093.0045, 2959.9536, 4186.0091, 5919.9072, 8372.0181, 11839.814, 16744.036
}

Definition at line 56 of file af_superequalizer.c.

Referenced by decode_component(), ff_ivi_init_planes(), ff_ivi_init_tiles(), ff_mpc_dequantize_and_synth(), ff_psy_init(), ivi_free_buffers(), make_bands(), make_filters_from_proto(), mpc7_decode_frame(), mpc8_decode_frame(), process_param(), read_coeffs_coarse(), set_best_abits_code(), and set_special_band_scalefactors().

superequalizer_inputs

const AVFilterPad superequalizer_inputs[]

static

Initial value:

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

Definition at line 332 of file af_superequalizer.c.

superequalizer_outputs

const AVFilterPad superequalizer_outputs[]

static

Initial value:

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

Definition at line 341 of file af_superequalizer.c.

superequalizer_options

const AVOption superequalizer_options[]

static

Initial value:

= {
    {  "1b", "set 65Hz band gain",    OFFSET(gains [0]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    {  "2b", "set 92Hz band gain",    OFFSET(gains [1]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    {  "3b", "set 131Hz band gain",   OFFSET(gains [2]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    {  "4b", "set 185Hz band gain",   OFFSET(gains [3]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    {  "5b", "set 262Hz band gain",   OFFSET(gains [4]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    {  "6b", "set 370Hz band gain",   OFFSET(gains [5]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    {  "7b", "set 523Hz band gain",   OFFSET(gains [6]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    {  "8b", "set 740Hz band gain",   OFFSET(gains [7]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    {  "9b", "set 1047Hz band gain",  OFFSET(gains [8]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    { "10b", "set 1480Hz band gain",  OFFSET(gains [9]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    { "11b", "set 2093Hz band gain",  OFFSET(gains[10]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    { "12b", "set 2960Hz band gain",  OFFSET(gains[11]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    { "13b", "set 4186Hz band gain",  OFFSET(gains[12]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    { "14b", "set 5920Hz band gain",  OFFSET(gains[13]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    { "15b", "set 8372Hz band gain",  OFFSET(gains[14]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    { "16b", "set 11840Hz band gain", OFFSET(gains[15]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    { "17b", "set 16744Hz band gain", OFFSET(gains[16]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    { "18b", "set 20000Hz band gain", OFFSET(gains[17]), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 20, AF },
    { NULL }
}

Definition at line 353 of file af_superequalizer.c.

ff_af_superequalizer

AVFilter ff_af_superequalizer

Initial value:

= {
    .name          = "superequalizer",
    .description   = NULL_IF_CONFIG_SMALL("Apply 18 band equalization filter."),
    .priv_size     = sizeof(SuperEqualizerContext),
    .priv_class    = &superequalizer_class,
    .query_formats = query_formats,
    .init          = init,
    .activate      = activate,
    .uninit        = uninit,
    .inputs        = superequalizer_inputs,
    .outputs       = superequalizer_outputs,
}

Definition at line 377 of file af_superequalizer.c.