af_aemphasis.c File Reference

#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.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)   offsetof(AudioEmphasisContext, 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 []
static const AVFilterPad	avfilter_af_aemphasis_outputs []
const AVFilter	ff_af_aemphasis

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

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.

Referenced by filter_frame().

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

avfilter_af_aemphasis_outputs

const AVFilterPad avfilter_af_aemphasis_outputs[]

static

Initial value:

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

Definition at line 364 of file af_aemphasis.c.

ff_af_aemphasis

const AVFilter ff_af_aemphasis

Initial value:

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

Definition at line 371 of file af_aemphasis.c.