asrc_afirsrc.c File Reference

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

Go to the source code of this file.

Data Structures
struct	AudioFIRSourceContext

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

Functions
	AVFILTER_DEFINE_CLASS (afirsrc)
static av_cold int	init (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static av_cold int	query_formats (AVFilterContext *ctx)
static int	parse_string (char *str, float **items, int *nb_items, int *items_size)
static void	lininterp (AVComplexFloat *complexf, const float *freq, const float *magnitude, const float *phase, int m, int minterp)
static av_cold int	config_output (AVFilterLink *outlink)
static int	activate (AVFilterContext *ctx)

Variables
static const AVOption	afirsrc_options []
static const AVFilterPad	afirsrc_outputs []
const AVFilter	ff_asrc_afirsrc

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(AudioFIRSourceContext, x)

Definition at line 61 of file asrc_afirsrc.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 62 of file asrc_afirsrc.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

afirsrc

)

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 84 of file asrc_afirsrc.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 96 of file asrc_afirsrc.c.

query_formats()

static av_cold int query_formats ( AVFilterContext *  ctx )

static

Definition at line 109 of file asrc_afirsrc.c.

parse_string()

static int parse_string ( char *  str, float **  items, int *  nb_items, int *  items_size  )

static

Definition at line 129 of file asrc_afirsrc.c.

Referenced by config_output().

lininterp()

static void lininterp ( AVComplexFloat *  complexf, const float *  freq, const float *  magnitude, const float *  phase, int  m, int  minterp  )

static

Definition at line 156 of file asrc_afirsrc.c.

Referenced by config_output().

config_output()

static av_cold int config_output ( AVFilterLink *  outlink )

static

Definition at line 178 of file asrc_afirsrc.c.

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 257 of file asrc_afirsrc.c.

Variable Documentation

afirsrc_options

const AVOption afirsrc_options[]

static

Initial value:

= {
    { "taps",      "set number of taps",   OFFSET(nb_taps),         AV_OPT_TYPE_INT,    {.i64=1025}, 9, UINT16_MAX, FLAGS },
    { "t",         "set number of taps",   OFFSET(nb_taps),         AV_OPT_TYPE_INT,    {.i64=1025}, 9, UINT16_MAX, FLAGS },
    { "frequency", "set frequency points", OFFSET(freq_points_str), AV_OPT_TYPE_STRING, {.str="0 1"}, 0, 0, FLAGS },
    { "f",         "set frequency points", OFFSET(freq_points_str), AV_OPT_TYPE_STRING, {.str="0 1"}, 0, 0, FLAGS },
    { "magnitude", "set magnitude values", OFFSET(magnitude_str),   AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, FLAGS },
    { "m",         "set magnitude values", OFFSET(magnitude_str),   AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, FLAGS },
    { "phase",     "set phase values",     OFFSET(phase_str),       AV_OPT_TYPE_STRING, {.str="0 0"}, 0, 0, FLAGS },
    { "p",         "set phase values",     OFFSET(phase_str),       AV_OPT_TYPE_STRING, {.str="0 0"}, 0, 0, FLAGS },
    { "sample_rate", "set sample rate",    OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100},  1, INT_MAX,    FLAGS },
    { "r",           "set sample rate",    OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100},  1, INT_MAX,    FLAGS },
    { "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 1024}, 1, INT_MAX, FLAGS },
    { "n",          "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 1024}, 1, INT_MAX, FLAGS },
    WIN_FUNC_OPTION("win_func", OFFSET(win_func), FLAGS, WFUNC_BLACKMAN),
    WIN_FUNC_OPTION("w",        OFFSET(win_func), FLAGS, WFUNC_BLACKMAN),
    {NULL}
}

Definition at line 64 of file asrc_afirsrc.c.

afirsrc_outputs

const AVFilterPad afirsrc_outputs[]

static

Initial value:

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

Definition at line 283 of file asrc_afirsrc.c.

ff_asrc_afirsrc

const AVFilter ff_asrc_afirsrc

Initial value:

= {
    .name          = "afirsrc",
    .description   = NULL_IF_CONFIG_SMALL("Generate a FIR coefficients audio stream."),
    .init          = init,
    .uninit        = uninit,
    .activate      = activate,
    .priv_size     = sizeof(AudioFIRSourceContext),
    .inputs        = NULL,
    FILTER_OUTPUTS(afirsrc_outputs),
    FILTER_QUERY_FUNC(query_formats),
    .priv_class    = &afirsrc_class,
}

Definition at line 291 of file asrc_afirsrc.c.