af_apsyclip.c File Reference

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

Go to the source code of this file.

Data Structures
struct	AudioPsyClipContext

Macros
#define	OFFSET(x)   offsetof(AudioPsyClipContext, x)
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM

Functions
	AVFILTER_DEFINE_CLASS (apsyclip)
static void	generate_hann_window (float *window, float *inv_window, int size)
static void	set_margin_curve (AudioPsyClipContext *s, const int(*points)[2], int num_points, int sample_rate)
static void	generate_spread_table (AudioPsyClipContext *s)
static int	config_input (AVFilterLink *inlink)
static void	apply_window (AudioPsyClipContext *s, const float *in_frame, float *out_frame, const int add_to_out_frame)
static void	calculate_mask_curve (AudioPsyClipContext *s, const float *spectrum, float *mask_curve)
static void	clip_to_window (AudioPsyClipContext *s, const float *windowed_frame, float *clipping_delta, float delta_boost)
static void	limit_clip_spectrum (AudioPsyClipContext *s, float *clip_spectrum, const float *mask_curve)
static void	r2c (float *buffer, int size)
static void	c2r (float *buffer, int size)
static void	feed (AVFilterContext *ctx, int ch, const float *in_samples, float *out_samples, int diff_only, float *in_frame, float *out_dist_frame, float *windowed_frame, float *clipping_delta, float *spectrum_buf, float *mask_curve)
static int	psy_channel (AVFilterContext *ctx, AVFrame *in, AVFrame *out, int ch)
static int	psy_channels (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	activate (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	apsyclip_options []
static const AVFilterPad	inputs []
const AVFilter	ff_af_apsyclip

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(AudioPsyClipContext, x)

Definition at line 67 of file af_apsyclip.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 68 of file af_apsyclip.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

apsyclip

)

generate_hann_window()

static void generate_hann_window ( float *  window, float *  inv_window, int  size  )

static

Definition at line 83 of file af_apsyclip.c.

Referenced by config_input().

set_margin_curve()

static void set_margin_curve ( AudioPsyClipContext *  s, const int(*)  points[2], int  num_points, int  sample_rate  )

static

Definition at line 94 of file af_apsyclip.c.

Referenced by config_input().

generate_spread_table()

static void generate_spread_table ( AudioPsyClipContext *  s )

static

Definition at line 120 of file af_apsyclip.c.

Referenced by config_input().

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 185 of file af_apsyclip.c.

apply_window()

static void apply_window ( AudioPsyClipContext *  s, const float *  in_frame, float *  out_frame, const int  add_to_out_frame  )

static

Definition at line 267 of file af_apsyclip.c.

Referenced by feed().

calculate_mask_curve()

static void calculate_mask_curve ( AudioPsyClipContext *  s, const float *  spectrum, float *  mask_curve  )

static

Definition at line 281 of file af_apsyclip.c.

Referenced by feed().

clip_to_window()

static void clip_to_window ( AudioPsyClipContext *  s, const float *  windowed_frame, float *  clipping_delta, float  delta_boost  )

static

Definition at line 331 of file af_apsyclip.c.

Referenced by feed().

limit_clip_spectrum()

static void limit_clip_spectrum ( AudioPsyClipContext *  s, float *  clip_spectrum, const float *  mask_curve  )

static

Definition at line 348 of file af_apsyclip.c.

Referenced by feed().

r2c()

static void r2c ( float *  buffer, int  size  )

static

Definition at line 377 of file af_apsyclip.c.

Referenced by feed().

c2r()

static void c2r ( float *  buffer, int  size  )

static

Definition at line 386 of file af_apsyclip.c.

Referenced by feed().

feed()

static void feed ( AVFilterContext *  ctx, int  ch, const float *  in_samples, float *  out_samples, int  diff_only, float *  in_frame, float *  out_dist_frame, float *  windowed_frame, float *  clipping_delta, float *  spectrum_buf, float *  mask_curve  )

static

Definition at line 395 of file af_apsyclip.c.

Referenced by psy_channel().

psy_channel()

static int psy_channel ( AVFilterContext *  ctx, AVFrame *  in, AVFrame *  out, int  ch  )

static

Definition at line 510 of file af_apsyclip.c.

Referenced by psy_channels().

psy_channels()

static int psy_channels ( AVFilterContext *  ctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 531 of file af_apsyclip.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 544 of file af_apsyclip.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 572 of file af_apsyclip.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 602 of file af_apsyclip.c.

Variable Documentation

apsyclip_options

const AVOption apsyclip_options[]

static

Initial value:

= {
    { "level_in",   "set input level",         OFFSET(level_in),   AV_OPT_TYPE_DOUBLE, {.dbl=1},.015625,   64, FLAGS },
    { "level_out",  "set output level",        OFFSET(level_out),  AV_OPT_TYPE_DOUBLE, {.dbl=1},.015625,   64, FLAGS },
    { "clip",       "set clip level",          OFFSET(clip_level), AV_OPT_TYPE_DOUBLE, {.dbl=1},.015625,    1, FLAGS },
    { "diff",       "enable difference",       OFFSET(diff_only),  AV_OPT_TYPE_BOOL,   {.i64=0},      0,    1, FLAGS },
    { "adaptive",   "set adaptive distortion", OFFSET(adaptive),   AV_OPT_TYPE_DOUBLE, {.dbl=0.5},    0,    1, FLAGS },
    { "iterations", "set iterations",          OFFSET(iterations), AV_OPT_TYPE_INT,    {.i64=10},     1,   20, FLAGS },
    { "level",      "set auto level",          OFFSET(auto_level), AV_OPT_TYPE_BOOL,   {.i64=0},      0,    1, FLAGS },
    {NULL}
}

Definition at line 70 of file af_apsyclip.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 632 of file af_apsyclip.c.

ff_af_apsyclip

const AVFilter ff_af_apsyclip

Initial value:

= {
    .name            = "apsyclip",
    .description     = NULL_IF_CONFIG_SMALL("Audio Psychoacoustic Clipper."),
    .priv_size       = sizeof(AudioPsyClipContext),
    .priv_class      = &apsyclip_class,
    .uninit          = uninit,
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_FLTP),
    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
                       AVFILTER_FLAG_SLICE_THREADS,
    .activate        = activate,
    .process_command = ff_filter_process_command,
}

Definition at line 640 of file af_apsyclip.c.