af_dynaudnorm.c File Reference

#include <float.h>
#include "libavutil/avassert.h"
#include "libavutil/opt.h"
#include "libavfilter/bufferqueue.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	local_gain
struct	cqueue
struct	DynamicAudioNormalizerContext

Macros
#define	MIN_FILTER_SIZE   3
#define	MAX_FILTER_SIZE   301
#define	FF_BUFQUEUE_SIZE   (MAX_FILTER_SIZE + 1)
#define	OFFSET(x)   offsetof(DynamicAudioNormalizerContext, x)
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Functions
	AVFILTER_DEFINE_CLASS (dynaudnorm)
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	frame_size (int sample_rate, int frame_len_msec)
static cqueue *	cqueue_create (int size, int max_size)
static void	cqueue_free (cqueue *q)
static int	cqueue_size (cqueue *q)
static int	cqueue_empty (cqueue *q)
static int	cqueue_enqueue (cqueue *q, double element)
static double	cqueue_peek (cqueue *q, int index)
static int	cqueue_dequeue (cqueue *q, double *element)
static int	cqueue_pop (cqueue *q)
static void	cqueue_resize (cqueue *q, int new_size)
static void	init_gaussian_filter (DynamicAudioNormalizerContext *s)
static av_cold void	uninit (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static double	fade (double prev, double next, int pos, int length)
static double	pow_2 (const double value)
static double	bound (const double threshold, const double val)
static double	find_peak_magnitude (AVFrame *frame, int channel)
static double	compute_frame_rms (AVFrame *frame, int channel)
static local_gain	get_max_local_gain (DynamicAudioNormalizerContext *s, AVFrame *frame, int channel)
static double	minimum_filter (cqueue *q)
static double	gaussian_filter (DynamicAudioNormalizerContext *s, cqueue *q, cqueue *tq)
static void	update_gain_history (DynamicAudioNormalizerContext *s, int channel, local_gain gain)
static double	update_value (double new, double old, double aggressiveness)
static void	perform_dc_correction (DynamicAudioNormalizerContext *s, AVFrame *frame)
static double	setup_compress_thresh (double threshold)
static double	compute_frame_std_dev (DynamicAudioNormalizerContext *s, AVFrame *frame, int channel)
static void	perform_compression (DynamicAudioNormalizerContext *s, AVFrame *frame)
static void	analyze_frame (DynamicAudioNormalizerContext *s, AVFrame *frame)
static void	amplify_frame (DynamicAudioNormalizerContext *s, AVFrame *frame, int enabled)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	flush_buffer (DynamicAudioNormalizerContext *s, AVFilterLink *inlink, AVFilterLink *outlink)
static int	flush (AVFilterLink *outlink)
static int	activate (AVFilterContext *ctx)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)

Variables
static const AVOption	dynaudnorm_options []
static const AVFilterPad	avfilter_af_dynaudnorm_inputs []
static const AVFilterPad	avfilter_af_dynaudnorm_outputs []
AVFilter	ff_af_dynaudnorm

Detailed Description

Dynamic Audio Normalizer

Definition in file af_dynaudnorm.c.

Macro Definition Documentation

MIN_FILTER_SIZE

#define MIN_FILTER_SIZE   3

Definition at line 32 of file af_dynaudnorm.c.

MAX_FILTER_SIZE

#define MAX_FILTER_SIZE   301

Definition at line 33 of file af_dynaudnorm.c.

FF_BUFQUEUE_SIZE

#define FF_BUFQUEUE_SIZE   (MAX_FILTER_SIZE + 1)

Definition at line 35 of file af_dynaudnorm.c.

OFFSET

#define OFFSET

(

x

)

offsetof(DynamicAudioNormalizerContext, x)

Definition at line 89 of file af_dynaudnorm.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 90 of file af_dynaudnorm.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

dynaudnorm

)

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 118 of file af_dynaudnorm.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 130 of file af_dynaudnorm.c.

frame_size()

static int frame_size ( int  sample_rate, int  frame_len_msec  )

inlinestatic

Definition at line 160 of file af_dynaudnorm.c.

Referenced by config_input(), and process_command().

cqueue_create()

static cqueue* cqueue_create ( int  size, int  max_size  )

static

Definition at line 166 of file af_dynaudnorm.c.

Referenced by config_input(), create_exec_ctx(), and ff_vk_create_exec_ctx().

cqueue_free()

static void cqueue_free ( cqueue *  q )

static

Definition at line 190 of file af_dynaudnorm.c.

Referenced by uninit().

cqueue_size()

static int cqueue_size ( cqueue *  q )

static

Definition at line 197 of file af_dynaudnorm.c.

Referenced by gaussian_filter(), minimum_filter(), and update_gain_history().

cqueue_empty()

static int cqueue_empty ( cqueue *  q )

static

Definition at line 202 of file af_dynaudnorm.c.

Referenced by cqueue_dequeue(), cqueue_pop(), filter_frame(), flush(), perform_compression(), perform_dc_correction(), and update_gain_history().

cqueue_enqueue()

static int cqueue_enqueue ( cqueue *  q, double  element  )

static

Definition at line 207 of file af_dynaudnorm.c.

Referenced by filter_frame(), and update_gain_history().

cqueue_peek()

static double cqueue_peek ( cqueue *  q, int  index  )

static

Definition at line 217 of file af_dynaudnorm.c.

Referenced by gaussian_filter(), minimum_filter(), and update_gain_history().

cqueue_dequeue()

static int cqueue_dequeue ( cqueue *  q, double *  element  )

static

Definition at line 223 of file af_dynaudnorm.c.

Referenced by amplify_frame(), and filter_frame().

cqueue_pop()

static int cqueue_pop ( cqueue *  q )

static

Definition at line 234 of file af_dynaudnorm.c.

Referenced by cqueue_resize(), and update_gain_history().

cqueue_resize()

static void cqueue_resize ( cqueue *  q, int  new_size  )

static

Definition at line 244 of file af_dynaudnorm.c.

Referenced by process_command().

init_gaussian_filter()

static void init_gaussian_filter ( DynamicAudioNormalizerContext *  s )

static

Definition at line 266 of file af_dynaudnorm.c.

Referenced by config_input(), and process_command().

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 293 of file af_dynaudnorm.c.

Referenced by config_input().

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 326 of file af_dynaudnorm.c.

fade()

static double fade ( double  prev, double  next, int  pos, int  length  )

inlinestatic

Definition at line 372 of file af_dynaudnorm.c.

Referenced by amplify_frame(), perform_compression(), and perform_dc_correction().

pow_2()

static double pow_2 ( const double  value )

inlinestatic

Definition at line 380 of file af_dynaudnorm.c.

Referenced by compute_frame_rms(), and compute_frame_std_dev().

bound()

static double bound ( const double  threshold, const double  val  )

inlinestatic

Definition at line 385 of file af_dynaudnorm.c.

Referenced by get_max_local_gain(), mp_decode_layer1(), mp_decode_layer2(), perform_compression(), and setup_compress_thresh().

find_peak_magnitude()

static double find_peak_magnitude ( AVFrame *  frame, int  channel  )

static

Definition at line 391 of file af_dynaudnorm.c.

Referenced by get_max_local_gain().

compute_frame_rms()

static double compute_frame_rms ( AVFrame *  frame, int  channel  )

static

Definition at line 413 of file af_dynaudnorm.c.

Referenced by get_max_local_gain().

get_max_local_gain()

static local_gain get_max_local_gain ( DynamicAudioNormalizerContext *  s, AVFrame *  frame, int  channel  )

static

Definition at line 440 of file af_dynaudnorm.c.

Referenced by analyze_frame().

minimum_filter()

static double minimum_filter ( cqueue *  q )

static

Definition at line 454 of file af_dynaudnorm.c.

Referenced by update_gain_history().

gaussian_filter()

static double gaussian_filter ( DynamicAudioNormalizerContext *  s, cqueue *  q, cqueue *  tq  )

static

Definition at line 466 of file af_dynaudnorm.c.

Referenced by update_gain_history().

update_gain_history()

static void update_gain_history ( DynamicAudioNormalizerContext *  s, int  channel, local_gain  gain  )

static

Definition at line 482 of file af_dynaudnorm.c.

Referenced by analyze_frame().

update_value()

static double update_value ( double  new, double  old, double  aggressiveness  )

inlinestatic

Definition at line 537 of file af_dynaudnorm.c.

Referenced by perform_compression(), and perform_dc_correction().

perform_dc_correction()

static void perform_dc_correction ( DynamicAudioNormalizerContext *  s, AVFrame *  frame  )

static

Definition at line 543 of file af_dynaudnorm.c.

Referenced by analyze_frame().

setup_compress_thresh()

static double setup_compress_thresh ( double  threshold )

static

Definition at line 566 of file af_dynaudnorm.c.

Referenced by perform_compression().

compute_frame_std_dev()

static double compute_frame_std_dev ( DynamicAudioNormalizerContext *  s, AVFrame *  frame, int  channel  )

static

Definition at line 588 of file af_dynaudnorm.c.

Referenced by perform_compression().

perform_compression()

static void perform_compression ( DynamicAudioNormalizerContext *  s, AVFrame *  frame  )

static

Definition at line 615 of file af_dynaudnorm.c.

Referenced by analyze_frame().

analyze_frame()

static void analyze_frame ( DynamicAudioNormalizerContext *  s, AVFrame *  frame  )

static

Definition at line 660 of file af_dynaudnorm.c.

Referenced by filter_frame().

amplify_frame()

static void amplify_frame ( DynamicAudioNormalizerContext *  s, AVFrame *  frame, int  enabled  )

static

Definition at line 684 of file af_dynaudnorm.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 706 of file af_dynaudnorm.c.

Referenced by activate(), and flush_buffer().

flush_buffer()

static int flush_buffer ( DynamicAudioNormalizerContext *  s, AVFilterLink *  inlink, AVFilterLink *  outlink  )

static

Definition at line 738 of file af_dynaudnorm.c.

Referenced by flush().

flush()

static int flush ( AVFilterLink *  outlink )

static

Definition at line 762 of file af_dynaudnorm.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 780 of file af_dynaudnorm.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 826 of file af_dynaudnorm.c.

Variable Documentation

dynaudnorm_options

const AVOption dynaudnorm_options[]

static

Initial value:

= {
    { "framelen",    "set the frame length in msec",     OFFSET(frame_len_msec),    AV_OPT_TYPE_INT,    {.i64 = 500},   10,  8000, FLAGS },
    { "f",           "set the frame length in msec",     OFFSET(frame_len_msec),    AV_OPT_TYPE_INT,    {.i64 = 500},   10,  8000, FLAGS },
    { "gausssize",   "set the filter size",              OFFSET(filter_size),       AV_OPT_TYPE_INT,    {.i64 = 31},     3,   301, FLAGS },
    { "g",           "set the filter size",              OFFSET(filter_size),       AV_OPT_TYPE_INT,    {.i64 = 31},     3,   301, FLAGS },
    { "peak",        "set the peak value",               OFFSET(peak_value),        AV_OPT_TYPE_DOUBLE, {.dbl = 0.95}, 0.0,   1.0, FLAGS },
    { "p",           "set the peak value",               OFFSET(peak_value),        AV_OPT_TYPE_DOUBLE, {.dbl = 0.95}, 0.0,   1.0, FLAGS },
    { "maxgain",     "set the max amplification",        OFFSET(max_amplification), AV_OPT_TYPE_DOUBLE, {.dbl = 10.0}, 1.0, 100.0, FLAGS },
    { "m",           "set the max amplification",        OFFSET(max_amplification), AV_OPT_TYPE_DOUBLE, {.dbl = 10.0}, 1.0, 100.0, FLAGS },
    { "targetrms",   "set the target RMS",               OFFSET(target_rms),        AV_OPT_TYPE_DOUBLE, {.dbl = 0.0},  0.0,   1.0, FLAGS },
    { "r",           "set the target RMS",               OFFSET(target_rms),        AV_OPT_TYPE_DOUBLE, {.dbl = 0.0},  0.0,   1.0, FLAGS },
    { "coupling",    "set channel coupling",             OFFSET(channels_coupled),  AV_OPT_TYPE_BOOL,   {.i64 = 1},      0,     1, FLAGS },
    { "n",           "set channel coupling",             OFFSET(channels_coupled),  AV_OPT_TYPE_BOOL,   {.i64 = 1},      0,     1, FLAGS },
    { "correctdc",   "set DC correction",                OFFSET(dc_correction),     AV_OPT_TYPE_BOOL,   {.i64 = 0},      0,     1, FLAGS },
    { "c",           "set DC correction",                OFFSET(dc_correction),     AV_OPT_TYPE_BOOL,   {.i64 = 0},      0,     1, FLAGS },
    { "altboundary", "set alternative boundary mode",    OFFSET(alt_boundary_mode), AV_OPT_TYPE_BOOL,   {.i64 = 0},      0,     1, FLAGS },
    { "b",           "set alternative boundary mode",    OFFSET(alt_boundary_mode), AV_OPT_TYPE_BOOL,   {.i64 = 0},      0,     1, FLAGS },
    { "compress",    "set the compress factor",          OFFSET(compress_factor),   AV_OPT_TYPE_DOUBLE, {.dbl = 0.0},  0.0,  30.0, FLAGS },
    { "s",           "set the compress factor",          OFFSET(compress_factor),   AV_OPT_TYPE_DOUBLE, {.dbl = 0.0},  0.0,  30.0, FLAGS },
    { "threshold",   "set the threshold value",          OFFSET(threshold),         AV_OPT_TYPE_DOUBLE, {.dbl = 0.0},  0.0,   1.0, FLAGS },
    { "t",           "set the threshold value",          OFFSET(threshold),         AV_OPT_TYPE_DOUBLE, {.dbl = 0.0},  0.0,   1.0, FLAGS },
    { NULL }
}

Definition at line 92 of file af_dynaudnorm.c.

avfilter_af_dynaudnorm_inputs

const AVFilterPad avfilter_af_dynaudnorm_inputs[]

static

Initial value:

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

Definition at line 854 of file af_dynaudnorm.c.

avfilter_af_dynaudnorm_outputs

const AVFilterPad avfilter_af_dynaudnorm_outputs[]

static

Initial value:

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

Definition at line 863 of file af_dynaudnorm.c.

ff_af_dynaudnorm

AVFilter ff_af_dynaudnorm

Initial value:

= {
    .name          = "dynaudnorm",
    .description   = NULL_IF_CONFIG_SMALL("Dynamic Audio Normalizer."),
    .query_formats = query_formats,
    .priv_size     = sizeof(DynamicAudioNormalizerContext),
    .init          = init,
    .uninit        = uninit,
    .activate      = activate,
    .inputs        = avfilter_af_dynaudnorm_inputs,
    .outputs       = avfilter_af_dynaudnorm_outputs,
    .priv_class    = &dynaudnorm_class,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
    .process_command = process_command,
}

Definition at line 871 of file af_dynaudnorm.c.