af_aemphasis.c File Reference

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

Go to the source code of this file.

Data Structures
struct	BiquadCoeffs
struct	RIAACurve
struct	AudioEmphasisContext
struct	ThreadData
	Used for passing data between threads. More...

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

Functions
	AVFILTER_DEFINE_CLASS (aemphasis)
static void	biquad_process (BiquadCoeffs *bq, double *dst, const double *src, int nb_samples, double *w, double level_in, double level_out)
static int	filter_channels (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static void	set_highshelf_rbj (BiquadCoeffs *bq, double freq, double q, double peak, double sr)
static void	set_lp_rbj (BiquadCoeffs *bq, double fc, double q, double sr, double gain)
static double	freq_gain (BiquadCoeffs *c, double freq, double sr)
static int	config_input (AVFilterLink *inlink)
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)

Variables
static const AVOption	aemphasis_options []
static const AVFilterPad	avfilter_af_aemphasis_inputs []
const FFFilter	ff_af_aemphasis

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(AudioEmphasisContext, x)

Definition at line 46 of file af_aemphasis.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 47 of file af_aemphasis.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

aemphasis

)

biquad_process()

static void biquad_process ( BiquadCoeffs * bq, double * dst, const double * src, int nb_samples, double * w, double level_in, double level_out )

inlinestatic

Definition at line 70 of file af_aemphasis.c.

Referenced by filter_channels().

filter_channels()

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

static

Definition at line 100 of file af_aemphasis.c.

filter_frame()

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

static

Definition at line 127 of file af_aemphasis.c.

set_highshelf_rbj()

static void set_highshelf_rbj ( BiquadCoeffs * bq, double freq, double q, double peak, double sr )

inlinestatic

Definition at line 154 of file af_aemphasis.c.

Referenced by config_input().

set_lp_rbj()

static void set_lp_rbj ( BiquadCoeffs * bq, double fc, double q, double sr, double gain )

inlinestatic

Definition at line 178 of file af_aemphasis.c.

Referenced by config_input().

freq_gain()

static double freq_gain ( BiquadCoeffs * c, double freq, double sr )

static

Definition at line 192 of file af_aemphasis.c.

Referenced by config_input().

config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 205 of file af_aemphasis.c.

Referenced by process_command().

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 336 of file af_aemphasis.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 348 of file af_aemphasis.c.

Variable Documentation

aemphasis_options

const AVOption aemphasis_options[]

static

Initial value:

= {
    { "level_in",      "set input gain", OFFSET(level_in),  AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 64, FLAGS },
    { "level_out",    "set output gain", OFFSET(level_out), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 64, FLAGS },
    { "mode",         "set filter mode", OFFSET(mode), AV_OPT_TYPE_INT,   {.i64=0}, 0, 1, FLAGS, .unit = "mode" },
    { "reproduction",              NULL,            0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "mode" },
    { "production",                NULL,            0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "mode" },
    { "type",         "set filter type", OFFSET(type), AV_OPT_TYPE_INT,   {.i64=4}, 0, 8, FLAGS, .unit = "type" },
    { "col",                 "Columbia",            0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "type" },
    { "emi",                      "EMI",            0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "type" },
    { "bsi",              "BSI (78RPM)",            0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, .unit = "type" },
    { "riaa",                    "RIAA",            0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, .unit = "type" },
    { "cd",         "Compact Disc (CD)",            0, AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, FLAGS, .unit = "type" },
    { "50fm",               "50µs (FM)",            0, AV_OPT_TYPE_CONST, {.i64=5}, 0, 0, FLAGS, .unit = "type" },
    { "75fm",               "75µs (FM)",            0, AV_OPT_TYPE_CONST, {.i64=6}, 0, 0, FLAGS, .unit = "type" },
    { "50kf",            "50µs (FM-KF)",            0, AV_OPT_TYPE_CONST, {.i64=7}, 0, 0, FLAGS, .unit = "type" },
    { "75kf",            "75µs (FM-KF)",            0, AV_OPT_TYPE_CONST, {.i64=8}, 0, 0, FLAGS, .unit = "type" },
    { NULL }
}

Definition at line 49 of file af_aemphasis.c.

avfilter_af_aemphasis_inputs

const AVFilterPad avfilter_af_aemphasis_inputs[]

static

Initial value:

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

Definition at line 355 of file af_aemphasis.c.

ff_af_aemphasis

const FFFilter ff_af_aemphasis

Initial value:

= {
    .p.name        = "aemphasis",
    .p.description = NULL_IF_CONFIG_SMALL("Audio emphasis."),
    .p.priv_class  = &aemphasis_class,
    .p.flags       = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC |
                     AVFILTER_FLAG_SLICE_THREADS,
    .priv_size     = sizeof(AudioEmphasisContext),
    .uninit        = uninit,
    FILTER_INPUTS(avfilter_af_aemphasis_inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_DBLP),
    .process_command = process_command,
}

Definition at line 364 of file af_aemphasis.c.