af_crossfeed.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/ffmath.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
#include "formats.h"

Go to the source code of this file.

Data Structures
struct	CrossfeedContext

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

Functions
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static void	reverse_samples (double *dst, const double *src, int nb_samples)
static void	filter_samples (double *dst, const double *src, int nb_samples, double b0, double b1, double b2, double a1, double a2, double *sw1, double *sw2)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in, int eof)
static int	activate (AVFilterContext *ctx)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
static av_cold void	uninit (AVFilterContext *ctx)
	AVFILTER_DEFINE_CLASS (crossfeed)

Variables
static const AVOption	crossfeed_options []
static const AVFilterPad	inputs []
const AVFilter	ff_af_crossfeed

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(CrossfeedContext, x)

Definition at line 341 of file af_crossfeed.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 342 of file af_crossfeed.c.

AF

#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 343 of file af_crossfeed.c.

Function Documentation

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 50 of file af_crossfeed.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 66 of file af_crossfeed.c.

Referenced by process_command().

reverse_samples()

static void reverse_samples ( double *  dst, const double *  src, int  nb_samples  )

static

Definition at line 102 of file af_crossfeed.c.

Referenced by filter_frame().

filter_samples()

static void filter_samples ( double *  dst, const double *  src, int  nb_samples, double  b0, double  b1, double  b2, double  a1, double  a2, double *  sw1, double *  sw2  )

static

Definition at line 109 of file af_crossfeed.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 132 of file af_crossfeed.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 274 of file af_crossfeed.c.

process_command()

static int process_command ( AVFilterContext *  ctx, const char *  cmd, const char *  args, char *  res, int  res_len, int  flags  )

static

Definition at line 320 of file af_crossfeed.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 332 of file af_crossfeed.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

crossfeed

)

Variable Documentation

crossfeed_options

const AVOption crossfeed_options[]

static

Initial value:

= {
    { "strength",  "set crossfeed strength",  OFFSET(strength),  AV_OPT_TYPE_DOUBLE, {.dbl=.2}, 0, 1, FLAGS },
    { "range",     "set soundstage wideness", OFFSET(range),     AV_OPT_TYPE_DOUBLE, {.dbl=.5}, 0, 1, FLAGS },
    { "slope",     "set curve slope",         OFFSET(slope),     AV_OPT_TYPE_DOUBLE, {.dbl=.5}, .01, 1, FLAGS },
    { "level_in",  "set level in",            OFFSET(level_in),  AV_OPT_TYPE_DOUBLE, {.dbl=.9}, 0, 1, FLAGS },
    { "level_out", "set level out",           OFFSET(level_out), AV_OPT_TYPE_DOUBLE, {.dbl=1.}, 0, 1, FLAGS },
    { "block_size", "set the block size",     OFFSET(block_size),AV_OPT_TYPE_INT,    {.i64=0}, 0, 32768, AF },
    { NULL }
}

Definition at line 345 of file af_crossfeed.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 357 of file af_crossfeed.c.

ff_af_crossfeed

const AVFilter ff_af_crossfeed

Initial value:

= {
    .name           = "crossfeed",
    .description    = NULL_IF_CONFIG_SMALL("Apply headphone crossfeed filter."),
    .priv_size      = sizeof(CrossfeedContext),
    .priv_class     = &crossfeed_class,
    .activate       = activate,
    .uninit         = uninit,
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_QUERY_FUNC(query_formats),
    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
    .process_command = process_command,
}

Definition at line 365 of file af_crossfeed.c.