asrc_afdelaysrc.c File Reference

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

Go to the source code of this file.

Data Structures
struct	AFDelaySrcContext

Macros
#define	AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	OFFSET(x)   offsetof(AFDelaySrcContext, x)

Functions
static av_cold int	init (AVFilterContext *ctx)
static float	sincf (float x)
static int	activate (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_output (AVFilterLink *outlink)
static av_cold void	uninit (AVFilterContext *ctx)
	AVFILTER_DEFINE_CLASS (afdelaysrc)

Variables
static const AVFilterPad	afdelaysrc_outputs []
static const AVOption	afdelaysrc_options []
const AVFilter	ff_asrc_afdelaysrc

Macro Definition Documentation

AF

#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 143 of file asrc_afdelaysrc.c.

OFFSET

#define OFFSET

(

x

)

offsetof(AFDelaySrcContext, x)

Definition at line 144 of file asrc_afdelaysrc.c.

Function Documentation

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 43 of file asrc_afdelaysrc.c.

sincf()

static float sincf ( float  x )

static

Definition at line 55 of file asrc_afdelaysrc.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 62 of file asrc_afdelaysrc.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 97 of file asrc_afdelaysrc.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 115 of file asrc_afdelaysrc.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 136 of file asrc_afdelaysrc.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

afdelaysrc

)

Variable Documentation

afdelaysrc_outputs

const AVFilterPad afdelaysrc_outputs[]

static

Initial value:

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

Definition at line 128 of file asrc_afdelaysrc.c.

afdelaysrc_options

const AVOption afdelaysrc_options[]

static

Initial value:

= {
    { "delay",       "set fractional delay",                          OFFSET(delay),       AV_OPT_TYPE_DOUBLE,{.dbl=0},      0, INT16_MAX, AF },
    { "d",           "set fractional delay",                          OFFSET(delay),       AV_OPT_TYPE_DOUBLE,{.dbl=0},      0, INT16_MAX, AF },
    { "sample_rate", "set sample rate",                               OFFSET(sample_rate), AV_OPT_TYPE_INT,   {.i64=44100},  1, INT_MAX,   AF },
    { "r",           "set sample rate",                               OFFSET(sample_rate), AV_OPT_TYPE_INT,   {.i64=44100},  1, INT_MAX,   AF },
    { "nb_samples",  "set the number of samples per requested frame", OFFSET(nb_samples),  AV_OPT_TYPE_INT,   {.i64=1024},   1, INT_MAX,   AF },
    { "n",           "set the number of samples per requested frame", OFFSET(nb_samples),  AV_OPT_TYPE_INT,   {.i64=1024},   1, INT_MAX,   AF },
    { "taps",        "set number of taps for delay filter",           OFFSET(nb_taps),     AV_OPT_TYPE_INT,   {.i64=0},      0,   32768,   AF },
    { "t",           "set number of taps for delay filter",           OFFSET(nb_taps),     AV_OPT_TYPE_INT,   {.i64=0},      0,   32768,   AF },
    { "channel_layout", "set channel layout",                         OFFSET(chlayout_str),AV_OPT_TYPE_STRING,{.str="stereo"},0,      0,   AF },
    { "c",              "set channel layout",                         OFFSET(chlayout_str),AV_OPT_TYPE_STRING,{.str="stereo"},0,      0,   AF },
    { NULL }
}

Definition at line 146 of file asrc_afdelaysrc.c.

ff_asrc_afdelaysrc

const AVFilter ff_asrc_afdelaysrc

Initial value:

= {
    .name          = "afdelaysrc",
    .description   = NULL_IF_CONFIG_SMALL("Generate a Fractional delay FIR coefficients."),
    .priv_size     = sizeof(AFDelaySrcContext),
    .priv_class    = &afdelaysrc_class,
    .init          = init,
    .activate      = activate,
    .uninit        = uninit,
    .inputs        = NULL,
    FILTER_OUTPUTS(afdelaysrc_outputs),
    FILTER_QUERY_FUNC(query_formats),
}

Definition at line 162 of file asrc_afdelaysrc.c.